Endocrinology and Metabolism

Kyong Soo Park (Park KS)

41 Articles

Diabetes, obesity and metabolism
Partial Deletion of Perk Improved High-Fat Diet-Induced Glucose Intolerance in Mice: Jooyeop Lee, Min Joo Kim, Seoil Moon, Ji Yoon Lim, Kyong Soo Park, Hye Seung Jung; Endocrinol Metab. 2023;38(6):782-787. Published online November 13, 2023; DOI: https://doi.org/10.3803/EnM.2023.1738

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Abstract PDF Supplementary Material PubReader ePub: Although pancreatic endoplasmic reticulum kinase (PERK) is indispensable to beta cells, low-dose PERK inhibitor improved glucose- stimulated insulin secretion (GSIS) and hyperglycemia in diabetic mice. Current study examined if partial deletion of Perk (Perk^+/-) recapitulated the effects of PERK inhibitor, on the contrary to the complete deletion. Perk^+/- mice and wild-type controls were fed with a high-fat diet (HFD) for 23 weeks. Glucose tolerance was evaluated along with serum insulin levels and islet morphology. Perk^+/- mice on normal chow were comparable to wild-type mice in various metabolic features. HFD-induced obesity was not influenced by Perk reduction; however, HFD-induced glucose intolerance was significantly improved since 15-week HFD. HFD-induced compromises in GSIS were relieved by Perk reduction, accompanied by reductions in phosphorylated PERK and activating transcription factor 4 (ATF4) in the islets. Meanwhile, HFD-induced islet expansion was not significantly affected. In summary, partial deletion of Perk improved glucose tolerance and GSIS impaired by diet-induced obesity, without changes in body weights or islet mass.

Diabetes, obesity and metabolism
Triglyceride-Glucose Index Predicts Future Atherosclerotic Cardiovascular Diseases: A 16-Year Follow-up in a Prospective, Community-Dwelling Cohort Study: Joon Ho Moon, Yongkang Kim, Tae Jung Oh, Jae Hoon Moon, Soo Heon Kwak, Kyong Soo Park, Hak Chul Jang, Sung Hee Choi, Nam H. Cho; Endocrinol Metab. 2023;38(4):406-417. Published online August 3, 2023; DOI: https://doi.org/10.3803/EnM.2023.1703

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Background
While the triglyceride-glucose (TyG) index is a measure of insulin resistance, its association with cardiovascular disease (CVD) has not been well elucidated. We evaluated the TyG index for prediction of CVDs in a prospective large communitybased cohort.
Methods
Individuals 40 to 70 years old were prospectively followed for a median 15.6 years. The TyG index was calculated as the Ln [fasting triglycerides (mg/dL)×fasting glucose (mg/dL)/2]. CVDs included any acute myocardial infarction, coronary artery disease or cerebrovascular disease. We used a Cox proportional hazards model to estimate CVD risks according to quartiles of the TyG index and plotted the receiver operating characteristics curve for the incident CVD.
Results
Among 8,511 subjects (age 51.9±8.8 years; 47.5% males), 931 (10.9%) had incident CVDs during the follow-up. After adjustment for age, sex, body mass index, diabetes mellitus, hypertension, total cholesterol, smoking, alcohol, exercise, and C-reactive protein, subjects in the highest TyG quartile had 36% increased risk of incident CVD compared with the lowest TyG quartile (hazard ratio, 1.36; 95% confidence interval, 1.10 to 1.68). Carotid plaque, assessed by ultrasonography was more frequent in subjects in the higher quartile of TyG index (P for trend=0.049 in men and P for trend <0.001 in women). The TyG index had a higher predictive power for CVDs than the homeostasis model assessment of insulin resistance (HOMA-IR) (area under the curve, 0.578 for TyG and 0.543 for HOMA-IR). Adding TyG index on diabetes or hypertension alone gave sounder predictability for CVDs.
Conclusion
The TyG index is independently associated with future CVDs in 16 years of follow-up in large, prospective Korean cohort.

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Construction and validation of a nomogram for predicting diabetes remission at 3 months after bariatric surgery in patients with obesity combined with type 2 diabetes mellitus
Kaisheng Yuan, Bing Wu, Ruiqi Zeng, Fuqing Zhou, Ruixiang Hu, Cunchuan Wang
Diabetes, Obesity and Metabolism.2024; 26(1): 169. CrossRef
Association between the triglyceride glucose index and chronic total coronary occlusion: A cross-sectional study from southwest China
Kaiyong Xiao, Huili Cao, Bin Yang, Zhe Xv, Lian Xiao, Jianping Wang, Shuiqing Ni, Hui Feng, Zhongwei He, Lei Xv, Juan Li, Dongmei Xv
Nutrition, Metabolism and Cardiovascular Diseases.2024; 34(4): 850. CrossRef
The association between TyG and all-cause/non-cardiovascular mortality in general patients with type 2 diabetes mellitus is modified by age: results from the cohort study of NHANES 1999–2018
Younan Yao, Bo Wang, Tian Geng, Jiyan Chen, Wan Chen, Liwen Li
Cardiovascular Diabetology.2024;[Epub] CrossRef
Triglyceride-glucose index predicts type 2 diabetes mellitus more effectively than oral glucose tolerance test-derived insulin sensitivity and secretion markers
Min Jin Lee, Ji Hyun Bae, Ah Reum Khang, Dongwon Yi, Mi Sook Yun, Yang Ho Kang
Diabetes Research and Clinical Practice.2024; 210: 111640. CrossRef
Prognostic value of triglyceride-glucose index for left ventricular remodeling in nondiabetic ST-elevation myocardial infarction patients
Tolga Han Efe, Engin Algül
Biomarkers in Medicine.2024;[Epub] CrossRef
Evaluation of the novel three lipid indices for predicting five- and ten-year incidence of cardiovascular disease: findings from Kerman coronary artery disease risk factors study (KERCADRS)
Alireza Jafari, Hamid Najafipour, Mitra Shadkam, Sina Aminizadeh
Lipids in Health and Disease.2023;[Epub] CrossRef

Diabetes
Pathophysiology of Type 2 Diabetes in Koreans: Soo Heon Kwak, Kyong Soo Park; Endocrinol Metab. 2018;33(1):9-16. Published online March 21, 2018; DOI: https://doi.org/10.3803/EnM.2018.33.1.9

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The pathophysiology of type 2 diabetes is characterized by variable degrees of insulin resistance and impaired insulin secretion. Both genetic and environmental factors serve as etiologic factors. Recent genetic studies have identified at least 83 variants associated with diabetes. A significant number of these loci are thought to be involved in insulin secretion, either through β-cell development or β-cell dysfunction. Environmental factors have changed rapidly during the past half century, and the increased prevalence of obesity and diabetes can be attributed to these changes. Environmental factors may affect epigenetic changes and alter susceptibility to diabetes. A recent epidemiologic study revealed that Korean patients with type 2 diabetes already had impaired insulin secretion and insulin resistance 10 years before the onset of diabetes. Those who developed diabetes showed impaired β-cell compensation with an abrupt decrease in insulin secretion during the last 2 years before diabetes developed. The retrograde trajectory of the disposition index differed according to the baseline subgroups of insulin secretion and insulin sensitivity. We hope that obtaining a more detailed understanding of the perturbations in the major pathophysiologic process of diabetes on the individual level will eventually lead to the implementation of precision medicine and improved patient outcomes.

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Associations between serum perfluoroalkyl and polyfluoroalkyl concentrations and diabetes mellitus in the Korean general population: Insights from the Korean National Environmental Health Survey 2018–2020
Habyeong Kang, Shin-Hye Kim
International Journal of Hygiene and Environmental Health.2024; 259: 114385. CrossRef
Stress-Reducing Psychological Interventions as Adjuvant Therapies for Diabetic Chronic Wounds
Isadora Pombeiro, João Moura, M. Graça Pereira, Eugénia Carvalho
Current Diabetes Reviews.2022;[Epub] CrossRef
Umbilical Cord-Mesenchymal Stem Cell-Conditioned Medium Improves Insulin Resistance in C2C12 Cell
Kyung-Soo Kim, Yeon Kyung Choi, Mi Jin Kim, Jung Wook Hwang, Kyunghoon Min, Sang Youn Jung, Soo-Kyung Kim, Yong-Soo Choi, Yong-Wook Cho
Diabetes & Metabolism Journal.2021; 45(2): 260. CrossRef
Dose-Dependent Effect of Smoking on Risk of Diabetes Remains after Smoking Cessation: A Nationwide Population-Based Cohort Study in Korea
Se Eun Park, Mi Hae Seo, Jung-Hwan Cho, Hyemi Kwon, Yang-Hyun Kim, Kyung-Do Han, Jin-Hyung Jung, Yong-Gyu Park, Eun-Jung Rhee, Won-Young Lee
Diabetes & Metabolism Journal.2021; 45(4): 539. CrossRef
DNA Methylation Changes Associated With Type 2 Diabetes and Diabetic Kidney Disease in an East Asian Population
Hakyung Kim, Jae Hyun Bae, Kyong Soo Park, Joohon Sung, Soo Heon Kwak
The Journal of Clinical Endocrinology & Metabolism.2021; 106(10): e3837. CrossRef
Associations among Obesity Degree, Glycemic Status, and Risk of Heart Failure in 9,720,220 Korean Adults
Eun-Jung Rhee, Hyemi Kwon, Se Eun Park, Kyung-Do Han, Yong-Gyu Park, Yang-Hyun Kim, Won-Young Lee
Diabetes & Metabolism Journal.2020; 44(4): 592. CrossRef
Smoking as a Target for Prevention of Diabetes
Ye Seul Yang, Tae Seo Sohn
Diabetes & Metabolism Journal.2020; 44(3): 402. CrossRef
Clinical characteristics of diabetic ketoacidosis in users and non-users of SGLT2 inhibitors
J.Y. Jeon, S.-K. Kim, K.-S. Kim, S.O. Song, J.-S. Yun, B.-Y. Kim, C.-H. Kim, S.O. Park, S. Hong, D.H. Seo, J.A. Seo, J.H. Noh, D.J. Kim
Diabetes & Metabolism.2019; 45(5): 453. CrossRef
Identifying Pathogenic Variants of Monogenic Diabetes Using Targeted Panel Sequencing in an East Asian Population
Seung Shin Park, Se Song Jang, Chang Ho Ahn, Jung Hee Kim, Hye Seung Jung, Young Min Cho, Young Ah Lee, Choong Ho Shin, Jong Hee Chae, Jae Hyun Kim, Sung Hee Choi, Hak C Jang, Jee Cheol Bae, Jong Cheol Won, Sung-Hoon Kim, Jong-Il Kim, Soo Heon Kwak, Kyong
The Journal of Clinical Endocrinology & Metabolism.2019; 104(9): 4188. CrossRef
Epigenetic Markers and Microbiota/Metabolite-Induced Epigenetic Modifications in the Pathogenesis of Obesity, Metabolic Syndrome, Type 2 Diabetes, and Non-alcoholic Fatty Liver Disease
Daniela Stols-Gonçalves, Luca Schiliró Tristão, Peter Henneman, Max Nieuwdorp
Current Diabetes Reports.2019;[Epub] CrossRef
The cut-off values of surrogate measures for insulin resistance in the Korean population according to the Korean Genome and Epidemiology Study (KOGES)
Bongyoung Kim, Hyun Young Choi, Wonhee Kim, Chiwon Ahn, Juncheol Lee, Jae Guk Kim, Jihoon Kim, Hyungoo Shin, Jae Myung Yu, Shinje Moon, Taulant Muka
PLOS ONE.2018; 13(11): e0206994. CrossRef

Erratum: Correction of Figure. Clinical Implications of Various Criteria for the Biochemical Diagnosis of Insulinoma: Chang Ho Ahn, Lee-Kyung Kim, Jie Eun Lee, Chan-Hyeon Jung, Se-Hee Min, Kyong Soo Park, Seong Yeon Kim, Young Min Cho; Endocrinol Metab. 2017;32(2):306. Published online June 23, 2017; DOI: https://doi.org/10.3803/EnM.2017.32.2.306

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Clinical Study
1,5-Anhydro-D-Glucitol Could Reflect Hypoglycemia Risk in Patients with Type 2 Diabetes Receiving Insulin Therapy: Min Kyeong Kim, Hye Seung Jung, Soo Heon Kwak, Young Min Cho, Kyong Soo Park, Seong Yeon Kim; Endocrinol Metab. 2016;31(2):284-291. Published online May 27, 2016; DOI: https://doi.org/10.3803/EnM.2016.31.2.284

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Background

The identification of a marker for hypoglycemia could help patients achieve strict glucose control with a lower risk of hypoglycemia. 1,5-Anhydro-D-glucitol (1,5-AG) reflects postprandial hyperglycemia in patients with well-controlled diabetes, which contributes to glycemic variability. Because glycemic variability is related to hypoglycemia, we aimed to evaluate the value of 1,5-AG as a marker of hypoglycemia.

Methods

We enrolled 18 adults with type 2 diabetes mellitus (T2DM) receiving insulin therapy and assessed the occurrence of hypoglycemia within a 3-month period. We measured 1,5-AG level, performed a survey to score the severity of hypoglycemia, and applied a continuous glucose monitoring system (CGMS).

Results

1,5-AG was significantly lower in the high hypoglycemia-score group compared to the low-score group. Additionally, the duration of insulin treatment was significantly longer in the high-score group. Subsequent analyses were adjusted by the duration of insulin treatment and mean blood glucose, which was closely associated with both 1,5-AG level and hypoglycemia risk. In adjusted correlation analyses, 1,5-AG was negatively correlated with hypoglycemia score, area under the curve at 80 mg/dL, and low blood glucose index during CGMS (P=0.068, P=0.033, and P=0.060, respectively).

Conclusion

1,5-AG level was negatively associated with hypoglycemia score determined by recall and with documented hypoglycemia after adjusting for mean glucose and duration of insulin treatment. As a result, this level could be a marker of the risk of hypoglycemia in patients with well-controlled T2DM receiving insulin therapy.

Citations

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Mobile Healthcare System Provided by Primary Care Physicians Improves Quality of Diabetes Care
Tae Jung Oh, Jie-Eun Lee, Seok Kim, Sooyoung Yoo, Hak Chul Jang
CardioMetabolic Syndrome Journal.2021; 1(1): 88. CrossRef
Effects of mobile phone application combined with or without self‐monitoring of blood glucose on glycemic control in patients with diabetes: A randomized controlled trial
Yuan Yu, Qun Yan, Huizhi Li, Hongmei Li, Lin Wang, Hua Wang, Yiyun Zhang, Lei Xu, Zhaosheng Tang, Xinfeng Yan, Yinghua Chen, Huili He, Jie Chen, Bo Feng
Journal of Diabetes Investigation.2019; 10(5): 1365. CrossRef
Articles inEndocrinology and Metabolismin 2016
Won-Young Lee
Endocrinology and Metabolism.2017; 32(1): 62. CrossRef
A Diet Diverse in Bamboo Parts is Important for Giant Panda (Ailuropoda melanoleuca) Metabolism and Health
Hairui Wang, Heju Zhong, Rong Hou, James Ayala, Guangmang Liu, Shibin Yuan, Zheng Yan, Wenping Zhang, Yuliang Liu, Kailai Cai, Zhigang Cai, He Huang, Zhihe Zhang, De Wu
Scientific Reports.2017;[Epub] CrossRef
Low and exacerbated levels of 1,5-anhydroglucitol are associated with cardiovascular events in patients after first-time elective percutaneous coronary intervention
Shuhei Takahashi, Kazunori Shimada, Katsumi Miyauchi, Tetsuro Miyazaki, Eiryu Sai, Manabu Ogita, Shuta Tsuboi, Hiroshi Tamura, Shinya Okazaki, Tomoyuki Shiozawa, Shohei Ouchi, Tatsuro Aikawa, Tomoyasu Kadoguchi, Hamad Al Shahi, Takuma Yoshihara, Makoto Hi
Cardiovascular Diabetology.2016;[Epub] CrossRef

Clinical Study
Clinical Characteristics of Subjects with Sulfonylurea-Dependent Type 2 Diabetes: Se Hee Min, Soo Heon Kwak, Young Min Cho, Kyong Soo Park, Hye Seung Jung; Endocrinol Metab. 2015;30(4):509-513. Published online December 31, 2015; DOI: https://doi.org/10.3803/EnM.2015.30.4.509

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Background

Even though several oral anti-diabetic drugs (OAD) with various modes of action are replacing sulfonylurea (SU), some patients seem to be dependent on SU for adequate glycemic control. Therefore, we evaluated the clinical characteristics of such patients.

Methods

We selected the patients with type 2 diabetes who met following criteria from 2009 to 2014 at Seoul National University Hospital: glycated hemoglobin (HbA1c) was maintained below 7.5% for at least 6 months under small dose of SU (glimepiride ≤2 mg/day or equivalent dose); after discontinuation of SU, HbA1c increased ≥1.2% within 3 months or ≥1.5% within 6 months; and after resuming SU, HbA1c reduction was ≥0.8% or reduction of fasting plasma glucose was ≥40 mg/dL within 3 months. Patients with impaired hepatic or renal function, and steroid users were excluded.

Results

Nineteen subjects were enrolled: after averaged 4.8±1.5 months of SU-free period, HbA1c increased from 6.7%±0.4% to 8.8%±0.8% even though adding other OAD such as gliptins. However, HbA1c decreased to 7.4%±0.7% after resuming SU within 2.4±0.8 months. There was no sexual predominance. Despite their old age (67±11 years) and long duration of diabetes (18±10 years), fasting C-peptide was relatively well-reserved (3.9±2.6 ng/mL), and nephropathy was not observed (albumin-creatinine ratio 21.2±16.6 mg/g and estimated glomerular filtration rate 75.8±18.0 mL/min/1.73 m²). Strong family history was also noted (73.7%).

Conclusion

Despite hypoglycemia risk of SU, it seemed indispensable for a subset of patients with regard to insulin secretion. Genetic influences would be evaluated.

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Incident Hepatocellular Carcinoma Risk in Patients Treated with a Sulfonylurea: A Nationwide, Nested, Case-Control Study
Ji-Yeon Lee, Suk-Yong Jang, Chung Mo Nam, Eun Seok Kang
Scientific Reports.2019;[Epub] CrossRef
A genetic variant in GLP1R is associated with response to DPP-4 inhibitors in patients with type 2 diabetes
Eugene Han, Hye Sun Park, Obin Kwon, Eun Yeong Choe, Hye Jin Wang, Yong-ho Lee, Sang-Hak Lee, Chul Hoon Kim, Lee-Kyung Kim, Soo Heon Kwak, Kyong Soo Park, Chul Sik Kim, Eun Seok Kang
Medicine.2016; 95(44): e5155. CrossRef

Endocrine Research
Thyroid Hormone Regulates the mRNA Expression of Small Heterodimer Partner through Liver Receptor Homolog-1: Hwa Young Ahn, Hwan Hee Kim, Ye An Kim, Min Kim, Jung Hun Ohn, Sung Soo Chung, Yoon-Kwang Lee, Do Joon Park, Kyong Soo Park, David D. Moore, Young Joo Park; Endocrinol Metab. 2015;30(4):584-592. Published online December 31, 2015; DOI: https://doi.org/10.3803/EnM.2015.30.4.584

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Background

Expression of hepatic cholesterol 7α-hydroxylase (CYP7A1) is negatively regulated by orphan nuclear receptor small heterodimer partner (SHP). In this study, we aimed to find whether thyroid hormone regulates SHP expression by modulating the transcriptional activities of liver receptor homolog-1 (LRH-1).

Methods

We injected thyroid hormone (triiodothyronine, T3) to C57BL/6J wild type. RNA was isolated from mouse liver and used for microarray analysis and quantitative real-time polymerase chain reaction (PCR). Human hepatoma cell and primary hepatocytes from mouse liver were used to confirm the effect of T3 in vitro. Promoter assay and electrophoretic mobility-shift assay (EMSA) were also performed using human hepatoma cell line

Results

Initial microarray results indicated that SHP expression is markedly decreased in livers of T3 treated mice. We confirmed that T3 repressed SHP expression in the liver of mice as well as in mouse primary hepatocytes and human hepatoma cells by real-time PCR analysis. LRH-1 increased the promoter activity of SHP; however, this increased activity was markedly decreased after thyroid hormone receptor β/retinoid X receptor α/T3 administration. EMSA revealed that T3 inhibits specific LRH-1 DNA binding.

Conclusion

We found that thyroid hormone regulates the expression of SHP mRNA through interference with the transcription factor, LRH-1.

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Bile acid and receptors: biology and drug discovery for nonalcoholic fatty liver disease
Ting-ying Jiao, Yuan-di Ma, Xiao-zhen Guo, Yun-fei Ye, Cen Xie
Acta Pharmacologica Sinica.2022; 43(5): 1103. CrossRef
Loperamide induces excessive accumulation of bile acids in the liver of mice with different diets
Zili Lei, Hedong Rong, Yanhong Yang, Siping Yu, Tianle Zhang, Lei Chen, Ya Nie, Qi Song, Qing Hu, Jiao Guo
Toxicology.2022; 477: 153278. CrossRef
Pathogenesis of hypothyroidism-induced NAFLD is driven by intra- and extrahepatic mechanisms
Giuseppe Ferrandino, Rachel R. Kaspari, Olga Spadaro, Andrea Reyna-Neyra, Rachel J. Perry, Rebecca Cardone, Richard G. Kibbey, Gerald I. Shulman, Vishwa Deep Dixit, Nancy Carrasco
Proceedings of the National Academy of Sciences.2017;[Epub] CrossRef

Obesity and Metabolism
Genetic Studies on Diabetic Microvascular Complications: Focusing on Genome-Wide Association Studies: Soo Heon Kwak, Kyong Soo Park; Endocrinol Metab. 2015;30(2):147-158. Published online June 30, 2015; DOI: https://doi.org/10.3803/EnM.2015.30.2.147

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Diabetes is a common metabolic disorder with a worldwide prevalence of 8.3% and is the leading cause of visual loss, end-stage renal disease and amputation. Recently, genome-wide association studies (GWASs) have identified genetic risk factors for diabetic microvascular complications of retinopathy, nephropathy, and neuropathy. We summarized the recent findings of GWASs on diabetic microvascular complications and highlighted the challenges and our opinion on future directives. Five GWASs were conducted on diabetic retinopathy, nine on nephropathy, and one on neuropathic pain. The majority of recent GWASs were underpowered and heterogeneous in terms of study design, inclusion criteria and phenotype definition. Therefore, few reached the genome-wide significance threshold and the findings were inconsistent across the studies. Recent GWASs provided novel information on genetic risk factors and the possible pathophysiology of diabetic microvascular complications. However, further collaborative efforts to standardize phenotype definition and increase sample size are necessary for successful genetic studies on diabetic microvascular complications.

Citations

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Genetics of diabetes
Shiwali Goyal, Jyoti Rani, Mohd Akbar Bhat, Vanita Vanita
World Journal of Diabetes.2023; 14(6): 656. CrossRef
Plasma thrombin-activatable fibrinolysis inhibitor and the 1040C/T polymorphism are risk factors for diabetic kidney disease in Chinese patients with type 2 diabetes
Qinghua Huang, Dujin Feng, Lianlian Pan, Huan Wang, Yan Wu, Bin Zhong, Jianguang Gong, Huijun Lin, Xianming Fei
PeerJ.2023; 11: e16352. CrossRef
The G Allele of the rs12050217 Polymorphism in the BDKRB1 Gene Is Associated with Protection for Diabetic Retinopathy
Leticia A. Brondani, Daisy Crispim, Julia Pisco, Jorge A. Guimarães, Markus Berger
Current Eye Research.2019; 44(9): 994. CrossRef
Genome‐wide association study identifies new susceptibility loci for diabetic nephropathy in Korean patients with type 2 diabetes mellitus
Kyung H. Jeong, Jin S. Kim, Jeong‐Taek Woo, Sang Y. Rhee, Yu H. Lee, Yang G. Kim, Ju‐Young Moon, Su K. Kim, Sun W. Kang, Sang H. Lee, Yeong H. Kim
Clinical Genetics.2019; 96(1): 35. CrossRef
Diabetic polyneuropathy, deep white matter lesions, and carotid atherosclerosis: is there any association?
Sevgi Ferik, Hayat Güven, Mehlika Panpallı Ateş, Işık Conkbayır, Selçuk Çomoğlu, Bülent Güven
Neurological Sciences.2018; 39(1): 103. CrossRef
Altered expression of WFS1 and NOTCH2 genes associated with diabetic nephropathy in T2DM patients
Sahar A. Sharaf, Nagwa A. Kantoush, Dina F. Ayoub, Alshaymaa A. Ibrahim, Amaal A. Abdelaal, Rokaya Abdel Aziz, Mahmoud M. ElHefnawi, Amira N. Ahmed
Diabetes Research and Clinical Practice.2018; 140: 304. CrossRef
Precision medicine in diabetes prevention, classification and management
Fangying Xie, Juliana CN Chan, Ronald CW Ma
Journal of Diabetes Investigation.2018; 9(5): 998. CrossRef
Clinical worthlessness of genetic prediction of common forms of diabetes mellitus and related chronic complications
R. Buzzetti, S. Prudente, M. Copetti, M. Dauriz, S. Zampetti, M. Garofolo, G. Penno, V. Trischitta
Nutrition, Metabolism and Cardiovascular Diseases.2017; 27(2): 99. CrossRef
Diabetic macular oedema: clinical risk factors and emerging genetic influences
Ebony Liu, Jamie E Craig, Kathryn Burdon
Clinical and Experimental Optometry.2017; 100(6): 569. CrossRef
Normoalbuminuric diabetic kidney disease
Chao Chen, Chang Wang, Chun Hu, Yachun Han, Li Zhao, Xuejing Zhu, Li Xiao, Lin Sun
Frontiers of Medicine.2017; 11(3): 310. CrossRef
Biomarkers of Diabetic Retinopathy
Daniel Shu Wei Ting, Kara-Anne Tan, Val Phua, Gavin Siew Wei Tan, Chee Wai Wong, Tien Yin Wong
Current Diabetes Reports.2016;[Epub] CrossRef
Association Between Heme Oxygenase-1 Promoter Polymorphisms and the Development of Albuminuria in Type 2 Diabetes
Eun Young Lee, Yong-ho Lee, Soo Hyun Kim, Kyu Sik Jung, Obin Kwon, Beom Seok Kim, Chung Mo Nam, Chun Sik Park, Byung-Wan Lee, Eun Seok Kang, Bong-Soo Cha, Hyun Chul Lee
Medicine.2015; 94(43): e1825. CrossRef

Obesity and Metabolism
Mitochondrial Complexes I and II Are More Susceptible to Autophagy Deficiency in Mouse β-Cells: Min Joo Kim, Ok Kyong Choi, Kyung Sil Chae, Min Kyeong Kim, Jung Hee Kim, Masaaki Komatsu, Keiji Tanaka, Hakmo Lee, Sung Soo Chung, Soo Heon Kwak, Young Min Cho, Kyong Soo Park, Hye Seung Jung; Endocrinol Metab. 2015;30(1):65-70. Published online March 27, 2015; DOI: https://doi.org/10.3803/EnM.2015.30.1.65

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Background

Damaged mitochondria are removed by autophagy. Therefore, impairment of autophagy induces the accumulation of damaged mitochondria and mitochondrial dysfunction in most mammalian cells. Here, we investigated mitochondrial function and the expression of mitochondrial complexes in autophagy-related 7 (Atg7)-deficient β-cells.

Methods

To evaluate the effect of autophagy deficiency on mitochondrial function in pancreatic β-cells, we isolated islets from Atg7^F/F:RIP-Cre+ mice and wild-type littermates. Oxygen consumption rate and intracellular adenosine 5'-triphosphate (ATP) content were measured. The expression of mitochondrial complex genes in Atg7-deficient islets and in β-TC6 cells transfected with siAtg7 was measured by quantitative real-time polymerase chain reaction.

Results

Baseline oxygen consumption rate of Atg7-deficient islets was significantly lower than that of control islets (P<0.05). Intracellular ATP content of Atg7-deficient islets during glucose stimulation was also significantly lower than that of control islets (P<0.05). By Oxygraph-2k analysis, mitochondrial respiration in Atg7-deficient islets was significantly decreased overall, although state 3 respiration and responses to antimycin A were unaffected. The mRNA levels of mitochondrial complexes I, II, III, and V in Atg7-deficient islets were significantly lower than in control islets (P<0.05). Down-regulation of Atg7 in β-TC6 cells also reduced the expression of complexes I and II, with marginal significance (P<0.1).

Conclusion

Impairment of autophagy in pancreatic β-cells suppressed the expression of some mitochondrial respiratory complexes, and may contribute to mitochondrial dysfunction. Among the complexes, I and II seem to be most vulnerable to autophagy deficiency.

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Proteomic pathways to metabolic disease and type 2 diabetes in the pancreatic islet
Belinda Yau, Sheyda Naghiloo, Alexis Diaz-Vegas, Austin V. Carr, Julian Van Gerwen, Elise J. Needham, Dillon Jevon, Sing-Young Chen, Kyle L. Hoehn, Amanda E. Brandon, Laurence Macia, Gregory J. Cooney, Michael R. Shortreed, Lloyd M. Smith, Mark P. Keller,
iScience.2021; 24(10): 103099. CrossRef
Natural compound oblongifolin C inhibits autophagic flux, and induces apoptosis and mitochondrial dysfunction in human cholangiocarcinoma QBC939 cells
Aiqing Zhang, Wei He, Huimin Shi, Xiaodan Huang, Guozhong Ji
Molecular Medicine Reports.2016; 14(4): 3179. CrossRef
Autophagy deficiency in β cells blunts incretin-induced suppression of glucagon release from α cells
Min Joo Kim, Ok Kyong Choi, Kyung Sil Chae, Hakmo Lee, Sung Soo Chung, Dong-Sik Ham, Ji-Won Kim, Kun-Ho Yoon, Kyong Soo Park, Hye Seung Jung
Islets.2015; 7(5): e1129096. CrossRef

Obesity and Metabolism
Clinical Implications of Various Criteria for the Biochemical Diagnosis of Insulinoma: Chang Ho Ahn, Lee-Kyung Kim, Jie Eun Lee, Chan-Hyeon Jung, Se-Hee Min, Kyong Soo Park, Seong Yeon Kim, Young Min Cho; Endocrinol Metab. 2014;29(4):498-504. Published online December 29, 2014; DOI: https://doi.org/10.3803/EnM.2014.29.4.498

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Background

Among the various diagnostic criteria for insulinoma, the ratio criteria have been controversial. However, the amended insulin-glucose ratio exhibited excellent diagnostic performance in a recent retrospective cohort study, although it has not yet been validated in other patient cohorts. We examined the diagnostic performance of the current criteria of the Endocrine Society, insulin-glucose ratio, C-peptide-glucose ratio, and amended ratios in terms of differentiating insulinomas.

Methods

We reviewed the medical records of patients who underwent evaluation for hypoglycemia from 2000 to 2013. Fourteen patients with histopathologically confirmed insulinoma and 18 patients without clinical evidence of insulinoma were included. The results of a prolonged fast test were analyzed according to the abovementioned criteria.

Results

Fulfilling all three Endocrine Society criteria-plasma levels of glucose (<3.0 mmol/L), insulin (≥8 pmol/L), and C-peptide (≥0.2 nmol/L)-exhibited 100% sensitivity and 89% specificity. Fulfilling the glucose and C-peptide criteria showed 100% sensitivity and 83% specificity, while fulfilling the glucose and insulin criteria showed 100% sensitivity and 72% specificity. Among the ratio criteria, the insulin-glucose ratio [>24.0 (pmol/L)/(mmol/L)] gave the highest area under the receiver operating characteristic curve, with 93% sensitivity and 94% specificity.

Conclusion

Fulfilling the glucose, insulin, and C-peptide criteria of the Endocrine Society guidelines exhibited the best diagnostic performance for insulinoma. Nonetheless, the insulin-glucose ratio may still have a role in the biochemical diagnosis of insulinoma.

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Homeostasis Model Assessment of β-Cell Function for Diagnosis of Insulinoma
Kálmán Bódis, Martin Schön, Laura Dauben, Miriam Wilker, Klaus Strassburger, Volker Burkart, Michael Roden, Karsten Müssig
The Journal of Clinical Endocrinology & Metabolism.2024; 109(3): e1125. CrossRef
A novel diagnostic model for insulinoma
Feng Wang, Zhe Yang, XiuBing Chen, Yiling Peng, HaiXing Jiang, ShanYu Qin
Discover Oncology.2022;[Epub] CrossRef
Comparison of the diagnostic accuracy of the current guidelines for detecting insulinoma
Laura Dauben, Marie-Christine Simon, Klaus Strassburger, Volker Burkart, Katharina S Weber, Sven Schinner, Michael Roden, Karsten Müssig
European Journal of Endocrinology.2019; 180(6): 381. CrossRef
EUS-guided lauromacrogol ablation of insulinomas: a novel treatment
Shanyu Qin, Yongru Liu, Hongjian Ning, Lin Tao, Wei Luo, Donghong Lu, Zuojie Luo, Yingfen Qin, Jia Zhou, Junqiang Chen, Haixing Jiang
Scandinavian Journal of Gastroenterology.2018; 53(5): 616. CrossRef
Diagnosis of insulinoma using the ratios of serum concentrations of insulin and C-peptide to glucose during a 5-hour oral glucose tolerance test
Xu Li, Feng Zhang, Haibing Chen, Haoyong Yu, Jian Zhou, Ming Li, Qing Li, Lianxi Li, Jun Yin, Fang Liu, Yuqian Bao, Junfeng Han, Weiping Jia
Endocrine Journal.2017; 64(1): 49. CrossRef
Insulinoma in a 5‐Year‐Old Dexter Cow
C. Binici, S. Plog, O. Kershaw, M. Schmicke, J.H. van der Kolk, K.E. Müller
Journal of Veterinary Internal Medicine.2016; 30(4): 1402. CrossRef
Vague neuroglycopenic complaints camouflage diagnosis of adolescent insulinoma: a case report
Kelsee Halpin, Ryan McDonough, Patria Alba, Jared Halpin, Vivekanand Singh, Yun Yan
International Journal of Pediatric Endocrinology.2016;[Epub] CrossRef
Articles in 'Endocrinology and Metabolism' in 2014
Won-Young Lee
Endocrinology and Metabolism.2015; 30(1): 47. CrossRef

Obesity and Metabolism
A Novel Mutation in the Von Hippel-Lindau Tumor Suppressor Gene Identified in a Patient Presenting with Gestational Diabetes Mellitus: Yun Hyi Ku, Chang Ho Ahn, Chan-Hyeon Jung, Jie Eun Lee, Lee-Kyung Kim, Soo Heon Kwak, Hye Seung Jung, Kyong Soo Park, Young Min Cho; Endocrinol Metab. 2013;28(4):320-325. Published online December 12, 2013; DOI: https://doi.org/10.3803/EnM.2013.28.4.320

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Background

Von Hippel-Lindau (VHL) disease is an autosomal dominantly inherited, multisystemic tumor syndrome caused by mutations in the VHL gene. To date, more than 1,000 germline and somatic mutations of the VHL gene have been reported. We present a novel mutation in the VHL tumor suppressor gene that presented with gestational diabetes mellitus.

Methods

A 30-year-old woman presented with gestational diabetes mellitus. She sequentially showed multiple pancreatic cysts, spinal cord hemangioblastoma, cerebellar hemangioblastoma, and clear cell type renal cell carcinomas. Also, her father and brother had brain hemangioblastomas. Each of the three exons of the VHL gene was individually amplified by polymerase chain reaction and direct sequencing was performed using an ABI 3730 DNA analyzer.

Results

DNA sequence analysis to determine the presence of VHL mutation in her family revealed del291C, a novel frameshift mutation.

Conclusion

We found a novel mutation in the VHL tumor suppressor gene that presented with gestational diabetes mellitus.

Citations

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Diversities of Mechanism in Patients with VHL Syndrome and diabetes: A Report of Two Cases and Literature Review
Yanlei Wang, Zhaoxiang Liu, Wenhui Zhao, Chenxiang Cao, Luqi Xiao, Jianzhong Xiao
Diabetes, Metabolic Syndrome and Obesity.2024; Volume 17: 1611. CrossRef
Retinal hemangioblastoma in a patient with Von Hippel-Lindau disease: A case report and literature review
Yikeng Huang, Weiwen Hu, Xionggao Huang
Frontiers in Oncology.2022;[Epub] CrossRef
Updates on the Role of Molecular Alterations and NOTCH Signalling in the Development of Neuroendocrine Neoplasms
Claudia von Arx, Monica Capozzi, Elena López-Jiménez, Alessandro Ottaiano, Fabiana Tatangelo, Annabella Di Mauro, Guglielmo Nasti, Maria Lina Tornesello, Salvatore Tafuto
Journal of Clinical Medicine.2019; 8(9): 1277. CrossRef
Brief Review of Articles in 'Endocrinology and Metabolism' in 2013
Won-Young Lee
Endocrinology and Metabolism.2014; 29(3): 251. CrossRef

Thyroid
Expression of Thyroid Stimulating Hormone Receptor mRNA in Mouse C2C12 Skeletal Muscle Cells: Jung Hun Ohn, Sun Kyoung Han, Do Joon Park, Kyong Soo Park, Young Joo Park; Endocrinol Metab. 2013;28(2):119-124. Published online June 18, 2013; DOI: https://doi.org/10.3803/EnM.2013.28.2.119

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Background

We analyzed whether thyroid stimulating hormone receptor (TSH-R) is expressed in a skeletal muscle cell line and if TSH has influence on the differentiation of muscle cells or on the determination of muscle fiber types.

Methods

TSH-R gene expression was detected with nested real-time polymerase chain reaction (RT-PCR) in C2C12, a mouse skeletal muscle cell line. The effect of TSH on myotube differentiation was assessed by microscopic examination of myotube formation and through the measurement of expression of muscle differentiation markers, i.e., myogenin and myoD, and muscle type-specific genes, i.e., MyHC1, MyHC2a, and MyHC2b, with quantitative RT-PCR before and after incubation of C2C12 myotube with TSH.

Results

TSH-R was expressed in the mouse skeletal muscle cell line. However, treatment with TSH had little effect on the differentiation of muscle cells, although the expression of the muscle differention marker myogenin was significantly increased after TSH treatment. Treatment of TSH did not affect the expression of muscle type-specific genes.

Conclusion

TSH-R is expressed in a mouse skeletal muscle cell line, but the role of TSH receptor signaling in skeletal muscle needs further investigation.

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Associations between thyroid hormones and appendicular skeletal muscle index, and hand grip strength in people with diabetes: The KAMOGAWA-A study
Shinnosuke Hata, Hiroshi Okada, Megumi Minamida, Junya Hironaka, Yuka Hasegawa, Yuriko Kondo, Hanako Nakajima, Nobuko Kitagawa, Takuro Okamura, Yoshitaka Hashimoto, Takafumi Osaka, Noriyuki Kitagawa, Saori Majima, Takafumi Senmaru, Emi Ushigome, Naoko Nak
Diabetes Research and Clinical Practice.2024; 209: 111573. CrossRef
Clinical parameters correlated with the psoas muscle index in Japanese individuals with type 2 diabetes mellitus
Emi Asano-Hayami, Yoshiaki Morishita, Tomohide Hayami, Yuka Shibata, Toshiki Kiyose, Sachiko Sasajima, Yusuke Hayashi, Mikio Motegi, Makoto Kato, Saeko Asano, Hiromi Nakai-Shimoda, Yuichiro Yamada, Emiri Miura-Yura, Tatsuhito Himeno, Masaki Kondo, Shin Ts
Diabetology International.2023; 14(1): 76. CrossRef
Effect of Thyroid-Stimulating Hormone Suppression on Muscle Function After Total Thyroidectomy in Patients With Thyroid Cancer
Jun Choul Lee, Byong-Sop Song, Young Mi Kang, Yu-Ri Kim, Yea Eun Kang, Ju Hee Lee, Minho Shong, Hyon-Seung Yi
Frontiers in Endocrinology.2021;[Epub] CrossRef
Different Relationships Between Thyrotropin and Muscle Strength According to Sex and Age in Euthyroid Koreans (The 6th Korea National Health and Nutritional Examination Survey 2014–2015)
Seong Hee Ahn, Da Hea Seo, Yongin Cho, Mihye Jung, So Hun Kim, Seongbin Hong
Thyroid.2020; 30(12): 1710. CrossRef
A Significant Association of Upper Limb Muscle Strength with Thyroid Function in Overweight and Obese Population: A Study of the Sixth Korea National Health and Nutrition Examination Survey (KNHANES 2014-2015)
Jeongmin Lee, Kwanhoon Jo, Jeonghoon Ha, Dong-Jun Lim, Jung Min Lee, Sang-Ah Chang, Moo Il Kang, Min-Hee Kim, Flavia Magri
International Journal of Endocrinology.2020; 2020: 1. CrossRef
Muscle-derived IL-6 improved insulin resistance of C2C12 cells through activating AMPK and inhibiting p38MAPK signal pathway in vitro
Hui Tang, Shuai Deng, Jian-guang Cai, Xue-nan Ma, Man Liu, Liang Zhou
International Journal of Diabetes in Developing Countries.2019; 39(3): 486. CrossRef
Thyroid Function as a Predictor of Handgrip Strength Among Middle-Aged and Older Euthyroid Adults: The TCLSIH Cohort Study
Yeqing Gu, Ge Meng, Hongmei Wu, Qing Zhang, Li Liu, Xue Bao, Yawen Wang, Shunming Zhang, Shaomei Sun, Xing Wang, Ming Zhou, Qiyu Jia, Kun Song, Kaijun Niu
Journal of the American Medical Directors Association.2019; 20(10): 1236. CrossRef
Association of Serum TSH With Handgrip Strength in Community-Dwelling Euthyroid Elderly
Beom-Jun Kim, Seung Hun Lee, Carlos M Isales, Mark W Hamrick, Mi Kyung Kwak, Jung-Min Koh
The Journal of Clinical Endocrinology & Metabolism.2018; 103(11): 3986. CrossRef
Changes in Thyroid Hormone Levels Within the Normal and/or Subclinical Hyper- or Hypothyroid Range Do Not Affect Circulating Irisin Levels in Humans
Grigorios Panagiotou, Kalliopi Pazaitou-Panayiotou, Stavroula A. Paschou, Despina Komninou, Nikolaos Kalogeris, Andromachi Vryonidou, Christos S. Mantzoros
Thyroid.2016; 26(8): 1039. CrossRef
Thyroid-stimulating hormone improves insulin sensitivity in skeletal muscle cells via cAMP/PKA/CREB pathway-dependent upregulation of insulin receptor substrate-1 expression
Min Kyong Moon, Geun Hyung Kang, Hwan Hee Kim, Sun Kyoung Han, Young Do Koo, Sun Wook Cho, Ye An Kim, Byung-Chul Oh, Do Joon Park, Sung Soo Chung, Kyong Soo Park, Young Joo Park
Molecular and Cellular Endocrinology.2016; 436: 50. CrossRef
Brief Review of Articles in 'Endocrinology and Metabolism' in 2013
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Thyroid
Two Cases of Methimazole-Induced Insulin Autoimmune Syndrome in Graves' Disease: Eun Roh, Ye An Kim, Eu Jeong Ku, Jae Hyun Bae, Hye Mi Kim, Young Min Cho, Young Joo Park, Kyong Soo Park, Seong Yeon Kim, Soo Heon Kwak; Endocrinol Metab. 2013;28(1):55-60. Published online March 25, 2013; DOI: https://doi.org/10.3803/EnM.2013.28.1.55

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We report here the cases of two females with Graves' disease who developed insulin autoimmune syndrome after treatment with methimazole. The patients exhibited a sudden altered mental state after treatment with methimazole for approximately 4 weeks. Patients had hypoglycemia with serum glucose below 70 mg/dL, and laboratory findings showed both high levels of serum insulin and high titers of insulin autoantibodies. The two women had never been exposed to insulin or oral antidiabetic agents, and there was no evidence of insulinoma in imaging studies. After glucose loading, serum glucose, and total insulin levels increased abnormally. One of the patient was found to have HLA-DRB1*0406, which is known to be strongly associated with methimazole-induced insulin autoimmune syndrome. After discontinuation of methimazole, hypoglycemic events disappeared within 1 month. Insulin autoantibody titer and insulin levels decreased within 5 months and there was no further development of hypoglycemic events. We present these cases with a review of the relevant literature.

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Insulin Autoimmune Syndrome: A Systematic Review
MingXu Lin, YuHua Chen, Jie Ning, Tatsuya Kin
International Journal of Endocrinology.2023; 2023: 1. CrossRef
Safety of Antithyroid Drugs in Avoiding Hyperglycemia or Hypoglycemia in Patients With Graves’ Disease and Type 2 Diabetes Mellitus: A Literature Review
Yu-Shan Hsieh
Cureus.2023;[Epub] CrossRef
Case report: hypoglycemia secondary to methimazole-induced insulin autoimmune syndrome in young Taiwanese woman with Graves’ disease
Hsuan-Yu Wu, I-Hua Chen, Mei-Yueh Lee
Medicine.2022; 101(25): e29337. CrossRef
Analysis of the clinical characteristics of insulin autoimmune syndrome induced by methimazole
Linli Sun, Weijin Fang, Dan Yi, Wei Sun, Chunjiang Wang
Journal of Clinical Pharmacy and Therapeutics.2021; 46(2): 470. CrossRef
Preoperative plasmapheresis experience in Graves’ disease patients with anti-thyroid drug-induced hepatotoxicity
Tugce Apaydın, Onur Elbasan, Dilek Gogas Yavuz
Transfusion and Apheresis Science.2020; 59(5): 102826. CrossRef
Glycemic variation in uncontrolled Graves’ disease patients with normal glucose metabolism: Assessment by continuous glucose monitoring
Gu Gao, Feng-fei Li, Yun Hu, Reng-na Yan, Bing-li Liu, Xiao-mei Liu, Xiao-fei Su, Jian-hua Ma, Gang Hu
Endocrine.2019; 64(2): 265. CrossRef
Insulin autoimmune syndrome induced by exogenous insulin injection: a four-case series
Yimin Shen, Xiaoxiao Song, Yuezhong Ren
BMC Endocrine Disorders.2019;[Epub] CrossRef
Assessment and Management of Anti-Insulin Autoantibodies in Varying Presentations of Insulin Autoimmune Syndrome
David Church, Luís Cardoso, Richard G Kay, Claire L Williams, Bernard Freudenthal, Catriona Clarke, Julie Harris, Myuri Moorthy, Efthmia Karra, Fiona M Gribble, Frank Reimann, Keith Burling, Alistair J K Williams, Alia Munir, T Hugh Jones, Dagmar Führer,
The Journal of Clinical Endocrinology & Metabolism.2018; 103(10): 3845. CrossRef
MANAGEMENT OF ENDOCRINE DISEASE: Pathogenesis and management of hypoglycemia
Nana Esi Kittah, Adrian Vella
European Journal of Endocrinology.2017; 177(1): R37. CrossRef
Insulin autoimmune syndrome during the administration of clopidogrel
Eijiro Yamada, Shuichi Okada, Tsugumichi Saito, Aya Osaki, Atushi Ozawa, Masanobu Yamada
Journal of Diabetes.2016; 8(4): 588. CrossRef
Hyperinsulinemic hypoglycemia associated with insulin antibodies caused by exogenous insulin analog
Chih-Ting Su, Yi-Chun Lin
Endocrinology, Diabetes & Metabolism Case Reports.2016;[Epub] CrossRef
Anti-tuberculosis Treatment-Induced Insulin Autoimmune Syndrome
Jung Suk Han, Han Ju Moon, Jin Seo Kim, Hong Il Kim, Cheol Hyeon Kim, Min Joo Kim
The Ewha Medical Journal.2016; 39(4): 122. CrossRef
2016 American Thyroid Association Guidelines for Diagnosis and Management of Hyperthyroidism and Other Causes of Thyrotoxicosis
Douglas S. Ross, Henry B. Burch, David S. Cooper, M. Carol Greenlee, Peter Laurberg, Ana Luiza Maia, Scott A. Rivkees, Mary Samuels, Julie Ann Sosa, Marius N. Stan, Martin A. Walter
Thyroid.2016; 26(10): 1343. CrossRef
Insulin Autoimmune Syndrome in a Patient with Hashimoto's Thyroiditis
In Wook Song, Eugene Han, Nan Hee Cho, Ho Chan Cho
Journal of Korean Thyroid Association.2014; 7(2): 180. CrossRef
Brief Review of Articles in 'Endocrinology and Metabolism' in 2013
Won-Young Lee
Endocrinology and Metabolism.2014; 29(3): 251. CrossRef

Primary Hyperaparathyroidism due to Cystic Parathyroid Adenoma not Detected on 99mTc-Sestamibi Scan.: Ah Reum Khang, Eun Ki Kim, Eun Young Nam, Sun Ju Byeon, Jung Hee Kim, Jung Hun Ohn, Eun Shil Hong, Hyung Jin Choi, Kyeong Cheon Jung, Myung Whun Sung, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim; Endocrinol Metab. 2012;27(1):83-88. Published online March 1, 2012; DOI: https://doi.org/10.3803/EnM.2012.27.1.83

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Parathyroid cysts, which can be divided into functional and non-functional cysts, are rare causes of primary hyperparathyroidism. A technetium-99m-methoxyisobutylisonitrile (99mTc-sestamibi) parathyroid scan is a sensitive diagnostic tool for the localization, although it sometimes shows a false-negative result. Here we report a case of presumed cystic parathyroid adenoma based on clinical findings and analysis of cystic fluid with negative findings in a parathyroid scan. A 44-year-old male patient visited the hospital due to leg pain and compressive symptoms (dysphagia, hoarseness) that had started 4-5 months before. His serum calcium level was 14.4 mg/dL and his intact parathyroid hormone (iPTH) had increased to 478.1 pg/mL. On neck computed tomography, a cystic nodule measuring 6.2 cm was detected in the inferior part of the right thyroid gland. Sestamibi uptake for this nodule was not detected on 2-h delayed imaging, and fluorodeoxyglucose positron emission tomography showed only subtle uptake. Fine-needle aspiration was performed and intracystic iPTH had increased to 61,600 pg/mL. Focused parathyroidectomy guided by intraoperative iPTH monitoring led to successful enucleation of the right inferior parathyroid gland. A parathyroid adenoma was confirmed, and his laboratory results had normalized. This study shows that cystic parathyroid adenoma can sometimes be difficult to detect on a 99mTc-sestamibi parathyroid scan.

Citations

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Functional parathyroid cystic adenoma: A rare cause of hypercalcemic crisis with primary hyperparathyroidism
BS Sumana, M Sabaretnam, Vijaya Sarathi, Akshatha Savith
Indian Journal of Pathology and Microbiology.2015; 58(4): 487. CrossRef
Normocalcemic primary hyperparathyroidism: long-term follow-up associated with multiple adenomas
Larissa Pimentel, Sirley Portela, Alyne Loureiro, Francisco Bandeira
Arquivos Brasileiros de Endocrinologia & Metabologia.2014; 58(5): 583. CrossRef

Androgen Receptor Gene CAG Repeat Polymorphism and Effect of Testosterone Therapy in Hypogonadal Men in Korea.: Min Joo Kim, Jin Taek Kim, Sun Wook Cho, Sang Wan Kim, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim; Endocrinol Metab. 2011;26(3):225-231. Published online September 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.3.225

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BACKGROUND
As the number of CAG repeats in the androgen receptor (AR) gene increases, transcriptional activities decrease and the effects of testosterone decline. In this study, we evaluated the importance of the CAG repeat polymorphism in regard to the effect/safety of testosterone therapy in hypogonadal Korean men. METHODS: The number of CAG repeats was determined in 42 hypogonadal men who underwent testosterone therapy for more than 24 months between December 1999 and August 2007. Body mass index, lean body mass, body fat, bone mineral density, type I collagen N-telopeptide (NTx), osteocalcin, lipid profile, hematocrit and PSA levels prior to and after 24 months of testosterone therapy were identified in our medical record review. RESULTS: Twenty-four months of testosterone therapy increased lean body mass, hematocrit, and PSA levels and reduced body fat, NTx, and HDL cholesterol levels. The mean number of CAG repeats in the AR gene was 23 +/- 3 (range, 15-29) in hypogonadal Korean men. The number of CAG repeats was not found to be associated with changes in lean body mass, body fat, NTx, HDL cholesterol, hematocrit, or PSA levels during testosterone therapy. CONCLUSIONS: No association between the number of CAG repeats in the AR gene and the effect/safety of testosterone therapy was detected in hypogonadal Korean men.

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Androgen Receptor CAG Repeat Length as a Risk Factor of Late-Onset Hypogonadism in a Korean Male Population
Jong Wook Kim, Young Dae Bae, Sun Tae Ahn, Jin Wook Kim, Je Jong Kim, Du Geon Moon
Sexual Medicine.2018; 6(3): 203. CrossRef
Positive Correlation between Androgen Receptor CAG Repeat Length and Metabolic Syndrome in a Korean Male Population
Jong Wook Kim, Young Dae Bae, Sun Tae Ahn, Jin Wook Kim, Je Jong Kim, Du Geon Moon
The World Journal of Men's Health.2018; 36(1): 73. CrossRef
Genome-Based Approaches in Endocrinology and Metabolism: From Clinical and Research Aspects
Sihoon Lee
Endocrinology and Metabolism.2011; 26(3): 208. CrossRef

Association of the Parathyroid Adenoma Volume and the Biochemical Parameters in Primary Hyperparathyroidism.: Yul Hwang-Bo, Jung Hee Kim, Jee Hyun An, Eun Shil Hong, Jung Hun Ohn, Eun Ky Kim, Ah Reum Khang, Sun Wook Cho, Do Joon Park, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Chan Soo Shin; Endocrinol Metab. 2011;26(1):62-66. Published online March 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.1.62

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BACKGROUND
The objective of this study is to demonstrate the relationship between the volume of a parathyroid adenoma and the preoperative biochemical parameters in patients undergoing surgery for primary hyperparathyroidism. METHODS: The medical records of 68 patients who underwent a parathyroidectomy for a single parathyroid adenoma were retrospectively reviewed. The volume of the adenoma was estimated using its measured size and a mathematical formula. The correlation between the volume of the parathyroid adenoma and the preoperative laboratory data was assessed. RESULTS: There were no correlations between the estimated volume of the adenoma and the serum calcium, alkaline phosphatase and parathyroid hormone levels. However, the volume of the adenoma was associated with the preoperative level of serum phosphorus. After excluding 5 adenomas with cystic degeneration, a positive correlation was noted between the adenoma volume and the preoperative levels of alkaline phosphatase and parathyroid hormone. CONCLUSION: The preoperative serum levels of calcium, alkaline phosphatase and parathyroid hormone are of limited use to predict the volume of the parathyroid adenoma in patients with a single parathyroid adenoma. We suggest that the absence of a correlation between the volume of the adenoma and the biochemical parameters can be attributed to the cystic degeneration of the adenomas.

Citations

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Differentiating pathologic parathyroid glands from thyroid nodules on neck ultrasound: the PARATH-US cross-sectional study
Dolly Yazgi, Carine Richa, Sylvie Salenave, Peter Kamenicky, Amel Bourouina, Lorraine Clavier, Margot Dupeux, Jean-François Papon, Jacques Young, Philippe Chanson, Luigi Maione
The Lancet Regional Health - Europe.2023; 35: 100751. CrossRef
Primer hiperparatiroidide Tc99m-MIBI sintigrafi sonuçlarının biyokimyasal ve histopatolojik bulgular ile ilişkisi
Seda TURGUT, Ezgi Başak ERDOĞAN
OSMANGAZİ JOURNAL OF MEDICINE.2020;[Epub] CrossRef
Letter: Association of the Parathyroid Adenoma Volume and the Biochemical Parameters in Primary Hyperparathyroidism (Endocrinol Metab 26:62-66, 2011, Yul Hwang-Bo et al.)
Dong Jin Chung
Endocrinology and Metabolism.2011; 26(2): 185. CrossRef

Clinical Characteristics of Langerhans Cell Histiocytosis with Hypothalamo-Pituitary Involvement.: Eun Shil Hong, Jung Hun Ohn, Jung Hee Kim, Yul Hwang-Bo, Jin Joo Kim, Jung Hee Kwon, Jung Won Lee, Se Youn Choi, Eun Kyung Lee, Sun Wook Cho, Chan Soo Shin, Kyong Soo Park, Hak Chul Jang, Bo Youn Cho, Hong Kyu Lee, Choong Ho Shin, Sei Won Yang, Seong Yeon Kim; Endocrinol Metab. 2011;26(1):38-43. Published online March 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.1.38

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BACKGROUND
Langerhans cell histiocytosis (LCH) is a rare disease that involves a clonal proliferation of Langerhans cells. LCH has a predilection for hypothalamo-pituitary axis (HPA) dysfunction, and this leads to diabetes insipidus (DI) and/or anterior pituitary dysfunction. Here, we describe the endocrine dysfunction and clinical characteristics of adult patients with LCH and we analyzed the differences between an adult-onset type and a childhood-onset type. METHODS: The data was obtained from a retrospective chart review of the patients with LCH that involved the HPA and who attended Seoul National University Hospital. The patients were classified into the adult-onset type (age at the time of diagnosis > or = 16) and the childhood-onset type (age at the time of diagnosis < or = 15). RESULTS: Ten patients (9 males and 1 female) were diagnosed with LCH involving the HPA. Five patients were classified as an adultonset type and the other five patients were classified as a childhood-onset type. The median follow-up duration was 6 (3-12) years for the adult-onset type and 16 (15-22) years for the childhood-onset type. All the patients presented with DI as the initial manifestation of HPA involvement. Four adult-onset patients and three childhood-onset patients had a multi-system disease. Panhypopituitarism developed in three adult-onset patients and in one childhood-onset patient. The pituitary lesion of the three adult-onset patients had spread to the brain during the follow-up duration. In contrast, the pituitary lesion of the other two adult-onset patients without panhypopituitarism and all the childhood-onset patients had not changed. CONCLUSION: DI was the initial presentation symptom of HPA involvement. Anterior pituitary hormone deficiency followed in some patients. Compared with the childhood-onset patients, the adult-onset patients were more likely to have panhypopituitarism and a poor prognosis.

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Pulmonary Langerhans Cell Histiocytosis in an Adult Male Presenting with Central Diabetes Insipidus and Diabetes Mellitus: A Case Report
Yeun Seoung Choi, Jung Soo Lim, Woocheol Kwon, Soon-Hee Jung, Il Hwan Park, Myoung Kyu Lee, Won Yeon Lee, Suk Joong Yong, Seok Jeong Lee, Ye-Ryung Jung, Jiwon Choi, Ji Sun Choi, Joon Taek Jeong, Jin Sae Yoo, Sang-Ha Kim
Tuberculosis and Respiratory Diseases.2015; 78(4): 463. CrossRef
Adult Multisystem Langerhans Cell Histiocytosis Presenting with Central Diabetes Insipidus Successfully Treated with Chemotherapy
Jung-Eun Choi, Hae Ri Lee, Jung Hun Ohn, Min Kyong Moon, Juri Park, Seong Jin Lee, Moon-Gi Choi, Hyung Joon Yoo, Jung Han Kim, Eun-Gyoung Hong
Endocrinology and Metabolism.2014; 29(3): 394. CrossRef

Pituitary Apoplexy in Korea - Characteristics, Treatment Options and Outcomes.: Jung Ah Lim, Jin Taek Kim, Min Joo Kim, Tae Hyuk Kim, Yenna Lee, Hwa Young Cho, Chan Soo Shin, Kyong Soo Park, Hak Chul Jang, Bo Youn Cho, Hong Kyu Lee, Seong Yeon Kim; J Korean Endocr Soc. 2009;24(4):247-253. Published online December 1, 2009; DOI: https://doi.org/10.3803/jkes.2009.24.4.247

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BACKGROUND
Reports on pituitary apoplexy in Korea are limited. There are two treatment options for pituitary apoplexy - surgical decompression and conservative management. In this study, we examined clinical presentation and outcomes following different therapies in Korean patients with pituitary apoplexy. METHODS: Clinical data and treatment outcomes from 52 patients with pituitary apoplexy who visited Seoul National University Hospital between January 1992 and June 2008 were reviewed retrospectively. Patients were divided into 2 groups according to management options (a surgery group vs. a conservative management group) and their outcomes were compared. For patients who underwent surgery due to neurological symptoms, outcomes were compared between early and late surgery groups. RESULTS: Headache (73.1%) was the most common presenting symptom, and more than half of the patients were reported to have visual symptoms. The most common type of pathology was a nonfunctioning pituitary adenoma (67.3%). Nine patients received conservative management and 43 underwent surgical decompression. Their recovery from neurological and endocrinological abnormalities were similar. Among patients who showed neurological symptoms, 9 underwent surgery within 1 week of symptom onset and 24 underwent surgery after 1 week. There was no significant difference between outcomes of early and late surgery groups except recovery from impaired visual deficit was greater in the late surgery group. CONCLUSION: Patients with pituitary apoplexy in Korea show similar clinical features as similar patients in other countries. In our study, there was no significant difference between clinical outcomes of the surgery group and the conservative treatment group.

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The Outcomes of Pituitary Apoplexy with Conservative Treatment: Experiences at a Single Institution
Youngbeom Seo, Yong Hwy Kim, Yun-Sik Dho, Jung Hee Kim, Jin Wook Kim, Chul-Kee Park, Dong Gyu Kim
World Neurosurgery.2018; 115: e703. CrossRef
Characteristics and Treatment Options of Pituitary Apoplexy
Dong-Sun Kim
Journal of Korean Endocrine Society.2009; 24(4): 237. CrossRef

Six Cases of Congenital Adrenal Hyperplasia That Were Due to 17alpha-hydroxylase/17,20-lyase Deficiency.: Dong Hoon Shin, Sung Hoon Yu, Young Min Choi, Jung Gu Kim, Sang Wan Kim, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim; J Korean Endocr Soc. 2009;24(2):109-115. Published online June 1, 2009; DOI: https://doi.org/10.3803/jkes.2009.24.2.109

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Abstract PDF

17alpha-hydroxylase/17,20-lyase deficiency is a rare phenotype of congenital adrenal hyperplasia (CAH), and this is characterized by hyporeninemic hypertension, primary amenorrhea and abnormality of the secondary sexual characteristics (pseudohermaphroditism in men). This type of CAH is usually misdiagnosed at first as mineralocorticoid induced hypertension with primary aldosteronism, but primary amenorrhea with deficient sex hormone is a clue for making the correct diagnosis. The authors experienced 6 cases of 17alpha-hydroxylase/17,20-lyase deficiency in patients who ranged from 15 to 42 years of age. 4 cases were diagnosed according to the investigation of their mineralocorticoid-induced hypertension and 2 cases their primary amenorrhea and sexual infantilism. All of them had hypokalemia, hyporeninemic hypertension and an atrophied uterus and ovaries. In the genotypic male (46 XY), the testicles were atrophied in the abdominal cavity. The levels of cortisol, estrogen and dehydroepiandrosterone sulfate (DHEAS) were low, but the levels of progesterone and 11-deoxycorticosterone were high. Therefore, the diagnosis of 17alpha-hydroxylase/17,20-lyase deficiency should be considered in female patients who present with both sexual infantilism and mineralocorticoid hypertension. We report on these cases with a brief review of the literature.

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Functional Identification of Compound Heterozygous Mutations in the CYP17A1 Gene Resulting in Combined 17α-Hydroxylase/17,20-Lyase Deficiency
Eun Yeong Mo, Ji-young Lee, Su Yeon Kim, Min Ji Kim, Eun Sook Kim, Seungok Lee, Je Ho Han, Sung-dae Moon
Endocrinology and Metabolism.2018; 33(3): 413. CrossRef
17α-hydroxylase Deficiency Mimicking Hyperaldosteronism by Aldosterone-producing Adrenal Adenoma
Yun Kyung Cho, Hyeseon Oh, Sun-myoung Kang, Sujong An, Jin-Young Huh, Ji-Hyang Lee, Woo Je Lee
The Korean Journal of Medicine.2016; 91(2): 191. CrossRef

Discrepancy between the Growth Hormone and Insulin-like Growth Factor-I Concentrations in Patients with Acromegaly.: Ji Won Yoon, Mi Yeon Kang, Hwa Young Ahn, Jee Hyun An, Sang Wan Kim, Chan Soo Shin, Kyong Soo Park, Hak Chul Jang, Bo Youn Cho, Hong Kyu Lee, Seong Yeon Kim; J Korean Endocr Soc. 2008;23(6):395-403. Published online December 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.6.395

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Abstract PDF: BACKGROUND
This study was performed to evaluate the frequency and clinical characteristics of patients with active acromegaly and who show discordance of the growth hormone (GH) level and the insulin-like growth factor-I (IGF-I) level. METHODS: We reviewed the medical records of the patients who were diagnosed with acromegaly between 01/01/1995 and 6/30/2007 at Seoul National University Hospital. We selected only the patients whose basal GH and IGF-I levels were available. We investigated the pre- and post-operative clinical characteristics, as well as the blood concentrations of GH and IGF-I. The concordance rate between the two hormones was examined. The patients were considered to have active disease on the basis of their IGF-I levels above the normal range, after adjustment for age and gender, and their mean basal GH value was > or = 2.5 microgram/L. The hormone levels and the clinical parameters were compared between the hormone concordant and discordant groups. RESULTS: We reviewed the preoperative records of 103 acromegalic patients, and these patients met the above-mentioned criteria. 53 postoperative patients who were not cured by operation were monitored without them receiving radiation or medical therapy. Both the basal GH and IGF-I levels were above normal in 103 patients preoperatively, and the discordant rate was 0% (0/103 cases). Postoperatively, the discordant rate between the two hormones was increased to 30.2% (16/53 cases). Age, gender, body mass index and tumor size were insignificantly different between the concordant and discordant groups. However, postoperative residual tumors were less frequently observed in the discordant group (P = 0.006). CONCLUSION: For the patients with acromegaly, unlike the 0% discordance preoperatively, 30.2% of patients showed a discrepancy between their GH and IGF-I levels postoperatively. The patients who had hormonal discrepancy were less likely to have residual tumors after operation. Considering the frequency of this hormonal discrepancy, both hormone levels should be measured to evaluate the disease activity after treatment. Further, oral glucose tolerance testing should be performed and especially for the patients with an increased GH level, but who have a normal IGF-I concentration.

Characteristics and Natural Course of Pituitary Incidentaloma in Korea.: You Jin Lee, Sun Wook Cho, Sang Wan Kim, Chan Soo Shin, Kyong Soo Park, Bo Youn Cho, Hong Kyu Lee, Seong Yeon Kim; J Korean Endocr Soc. 2008;23(2):111-116. Published online April 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.2.111

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BACKGROUND
A pituitary incidentaloma is a pituitary mass discovered incidentally by computed tomography (CT) or magnetic resonance (MRI) of the brain performed for evaluation of an unrelated disease, and when the patient did not show neurological or endocrine signs and symptoms. Despite of increasing incidence, only a few studies have reported on characteristics, natural history, treatment, or follow-up strategy. Moreover no epidemiologic data exist on pituitary incidentaloma in Korean. METHODS: We retrospectively enrolled subjects diagnosed as pituitary incidentaloma in Seoul National University Hospital from January 1992 to August 2006. We reviewed baseline demographic findings and the results of basal hormone tests, visual field test, and MRI (or CT) at baseline and during follow-up. RESULTS: Among 1310 patients with pituitary adenoma, 161 subjects were diagnosed with incidentaloma. The subject age at diagnosis was 49.7 +/- 15.5 years, with 84 males. Macroadenoma was more frequent (n = 110, 68.3%). with microadenomas and Rathke's cleft cysts found in 21 and 30 cases, respectively. The mean diameter of the tumor was 1.75 cm. Functional incidentalomas such as prolactinoma or acromegaly were found in 31 cases (19.3%) although there were no symptoms or visual field defects. Of 61 incidentaloma patients who did not undergo surgery or other treatment over one year, only 3 patient showed an increase in tumor size during the mean 38.0 +/- 24.9 months follow-up. CONCLUSION: Pituitary incidentaloma generally showed a benign course despite the high prevalence of macroadenoma (68.3%). However, as about 20% of the patients had functioning tumors, pituitary hormonal evaluation at diagnosis is mandatory. Furthermore, as we experienced 3 cases with increased tumor size during follow up, including a case of pituitary microadenoma, long-term careful follow-up of pituitary incidentaloma seems necessary. A long-term, prospective study with more patients would reveal the characteristics and the natural history of pituitary incidentalomas in Korea.

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Sellar Masses: An Epidemiological Study
Khaled Al-Dahmani, Syed Mohammad, Fatima Imran, Chris Theriault, Steve Doucette, Deborah Zwicker, Churn-Ern Yip, David B. Clarke, Syed Ali Imran
Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques.2016; 43(2): 291. CrossRef
Optimal Surgical Approaches for Rathke Cleft Cyst With Consideration of Endocrine Function
Jeong Kyung Park, Eun Jig Lee, Sun Ho Kim
Operative Neurosurgery.2012; 70: ons250. CrossRef
Clinical Characteristics of 16 Patients with Pituitary Tumor Incidentally Detected by18F-Fluorodeoxyglucose PET-CT (18F-FDG PET-CT)
Hyung Jin Kim, Gi Jeong Cheon, A Ra Cho, Chang Hoon Lee, Sang Min Youn, Se jin Ahn, Sang Eon Jang, Jung Min Kim, Yun Yong Lee, Ka Hee Yi
Endocrinology and Metabolism.2010; 25(4): 321. CrossRef

Cystic Insulinoma of the Pancreas.: Sun Wook Cho, Eun Jung Lee, Soo Heon Kwak, Young Min Cho, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2006;21(6):552-555. Published online December 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.6.552

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Abstract PDF: Cystic islet cell neoplasms are among the rarest entities in the differential diagnosis of cystic tumor of the pancreas, and this malady raises difficult clinical problems. The diagnosis of insulinoma could be difficult if the functional activity is incomplete, which possibly leads to blunted symptoms of hypoglycemia and failure in the laboratory to provide evidence of hyperinsulinemia. Furthermore, if the imaging shows a smaller tumor than usual or an unusual morphology like cyctic tumor, then physicians can become somewhat confused. We report here on a clinical case of cystic insulinoma with the typical neuroglycopenic symptoms and laboratory-confirmed hyperinsulinemia. At resection, a 2-cm cavitary mass without central necrosis was excised and this was confirmed histologically as a purely cystic insulioma. This is the first report of a functional cystic insulinoma of the pancreas in Korea. We suggest that the differential diagnosis of endocrine tumor must be considered for any pancreatic cyst, and especially when it is discovered in a patient who is clinically suggestive of having the associated syndrome.

Relation between Adiponectin and Metabolic Risk Factors.: Kyong Soo Park; J Korean Endocr Soc. 2005;20(5):441-443. Published online October 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.5.441

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Abstract PDF

No abstract available.

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Anti-Obesity Effect of Aster yomena Extracts through Regulation of AMPK/SIRT1 Signaling
Hye-Jeong Hwang, Yu Jin Hwang, Hyunseo Go, Kyung-A Hwang
Journal of the Korean Society of Food Science and Nutrition.2024; 53(3): 223. CrossRef
Effects of Administering Platycladus orientalis Leaf Extract on Glucose and Lipid Metabolism and Plasma Adiponectin Levels in Rats
Chaeyeong Kim, Inkyung Baik
Journal of the Korean Society of Food Science and Nutrition.2023; 52(11): 1119. CrossRef
A study on the effect on obesity and lipid metabolism in liver hypofunction animal-experimental model induced by injection
Junghwan Park, Yoonha Kim, Jinyoung Kwak, Seojin Hong, Jungmi Park, Taekwon Ahn
Journal of Korean Medicine.2016; 37(3): 47. CrossRef
The Effects of 12-Weeks Intensive Intervention Program on Cardiovascular Risk Factors, Adipocytokines and Nutrients Intakes in Industrial Male Workers
Kieun Moon, Ill Keun Park, Yeon Sang Jo, Yun Kyun Chang, Yun Mi Paek, Tae In Choi
The Korean Journal of Nutrition.2011; 44(4): 292. CrossRef

The Effects on Visceral Fat and Cardiovascular Risk Factors of Testosterone Replacement in Secondary Hypogonadal Men.: Eui Sil Hong, Sung Yeon Kim, Young Ju Choi, Sang Wan Kim, Chan Soo Shin, Kyong Soo Park, Hak Chul Jang, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2005;20(3):252-260. Published online June 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.3.252

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Abstract PDF

BACKGROUND
Increased body fat, abdominal obesity and insulin resistance are important clinical features in hypogonadal men. Several studies have demonstrated that a low testosterone concentration in men is associated with coronary heart disease, visceral obesity and insulin resistance. In this study, the effects of testosterone replacement therapy on the abdominal visceral fat and cardiovascular risk factors in hypogonadal men were investigated. METHODS: We selected 26 men with secondary hypogonadism (mean serum testosterone+/-SD 0.39+/- 0.57ng/mL), who were then treated with testosterone for 12 months. We measured the body composition, including the abdominal visceral fat area by abdominal CT at the L4 level, both before and 12 months after treatment, and the lipid profile, fasting plasma insulin, HOMA-IR and the serum homocysteine, CRP and IL-6 before and 6, 12 months after treatment. RESULTS: With respect to the body composition, the lean body mass had significantly increased 12 months after treatment(P= 0.002), but there were no significant changes in the body fat mass and abdominal visceral fat area. There was a trend toward a decreased fasting plasma insulin and HOMA-IR, but this did not reach statistical significance. The total cholesterol had decreased significantly at 12 months(P=0.04) and the HDL cholesterol decreased significantly over the course of study(P=0.02). There were no significant changes in the serum homocysteine, CRP and IL-6 after treatment. CONCLUSIONS: After 12 months testosterone replacement therapy in the 26 men with hypogonadism, the lean body mass had increased significantly, but there was no significant change on the abdominal visceral fat during the treatment period. Testosterone replacement had deleterious effect on HDL cholesterol, but not significant effects on insulin resistance and the serum homocysteine, CRP and IL-6. These results suggest that testosterone replacement therapy may have a few adverse effects on cardiovascular diseases in hypogonadal men. However, it will be necessary to examine the long-term effects of testosterone replacement on the incidence of cardiovascular events as well as the cardiovascular risk factors in men with hypogonadism

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The Association of Level of Testosterone and Parameters of Obesity
Chong Hwa Kim
The Korean Journal of Obesity.2015; 24(1): 28. CrossRef
The Relationship between Various Obesity Indices and Level of Male Hormone according to Different Age Groups
Yoo-Jung Lee, Hyeon-Ju Kim, Mi-Hee Kong
The Korean Journal of Obesity.2014; 23(4): 245. CrossRef
Androgen Receptor Gene CAG Repeat Polymorphism and Effect of Testosterone Therapy in Hypogonadal Men in Korea
Min Joo Kim, Jin Taek Kim, Sun Wook Cho, Sang Wan Kim, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim
Endocrinology and Metabolism.2011; 26(3): 225. CrossRef
Effects of Androgen on the Cardiovascular System in the Aging Male
Jin Wook Kim, Je Jong Kim, Du Geon Moon
Korean Journal of Andrology.2011; 29(1): 10. CrossRef

A Case of Primary Reninism Manifested by Hypertension with Hypokalemia.: Hyung Jin Choi, Eui Sil Hong, Young Min Cho, Do Joon Park, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2005;20(2):168-173. Published online April 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.2.168

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Abstract PDF

Primary reninism is a rare cause of hypertension manifesting along with hypokalemia. A high level of plasma renin activity and a high level of serum aldosterone are the whole markers of primary reninism. Upon making the diagnosis of primary reninism, other more common causes of aldosteronism must be differentiated, such as renovascular hypertension and primary aldosteronism. Primary reninism is commonly caused by juxtaglomerular cell tumor, which is one of the curable causes of hypertension, and this can be successfully treated by conservative surgery. We report here on a case of primary reninism that was caused by juxtaglomerular cell tumor that developed in a 22-year-old female patient. She was recently diagnosed with hypertension and hypokalemia. She had markedly elevated plasma renin activity and an increased serum aldosterone concentration. Computed tomography revealed a mass located in the right kidney and selective renal vein sampling suggested that the mass was secreting an excess of renin. Right nephrectomy was done and her hypertension with hypokalemia was successfully treated. We report here a case of primary reninism that presented with juxtaglomerular cell tumor along with a review of the literature

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Reninoma: a rare cause of curable hypertension
Ji Hye Kim, Ji Hyun Kim, Myung Hyun Cho, Eujin Park, Hye Sun Hyun, Yo Han Ahn, Hee Gyung Kang, Kyung Chul Moon, Il-Soo Ha, Hae Il Cheong
Korean Journal of Pediatrics.2019; 62(4): 144. CrossRef

The Efficacy of MIBG Scan as a Diagnostic and Docalization Test for Pheochromocytoma.: Cheol Ku Park, Kyeong Won Kim, Do Hee Kim, Jae Hyeon Kim, Jun Gu Kang, San Wan Kim, Young Min Cho, Do Joon Park, Chan Soo Shin, Kyong Soo Park, Bo Youn Cho, Hong Kyu Lee, Seong Yeon Kim; J Korean Endocr Soc. 2005;20(1):21-28. Published online February 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.1.21

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Abstract PDF: BACKGROUND
Computed tomography(CT) is currently considered as the initial imaging procedure of choice for the localization of pheochromocytomas in most of the cases. 131I-or 123I-Metaiodobenzylguanidine scintigraphy(MIBG scan) was proven to be a highly specific tool for the detection of adrenal and extra-adrenal pheochromocytomas, but was less sensitive than CT. The present study is aimed to evaluate the usefulness of a MIBG scan in diagnosis and localization of pheochromocytoma when compared to CT. METHODS: We retrospectively evaluated 27 patients who underwent a MIBG scan for a pheochromocytoma at the Seoul National University Hospital from the year 2000 and 2002. According to the pathological and clinical findings, in 16 the patients pheochromocytoma was confirmed to be positive and the rest 11 of the patients were excluded from the study. RESULTS: Pheochromocytomas was identified in 16 patients. Eleven of them were localized in adrenal gland and 5 were extra-adrenal lesions. The sensitivity to MIBG scan in adrenal lesions and extra-adrenal lesions, was 72%(8/11) and 40%(2/5) respectively. In our study, the overall sensitivity to MIBG scan was 62%(10/16), and overall specificity was 90.9%(10/11). By CT four were identified to have equivocal biochemical abnormalities, but were definite and extraadrenal tumors by MIBG scan showed abnormal uptakes in two of them. CONCLUSION: The MIBG scan was especially useful in 2 of the 27 patients but we had no experienced about the additional benefits of a MIBG scan in the other 25 cases. Our results reveal that a MIBG scan should be performed carefully for the diagnosis and localization of a pheochromocytoma, while considering cost and time of operation.

Metabolic Syndrom and Perosixome Proliferator-activated Receptor gamma.: Soo Lim, Kyong Soo Park; J Korean Endocr Soc. 2004;19(3):256-266. Published online June 1, 2004

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Abstract PDF: No abstract available.

Metabolic Syndrome.: Min Kyong Moon, Young Min Cho, Soo Lim, Kyong Soo Park, Hong Kyu Lee; J Korean Endocr Soc. 2003;18(2):105-119. Published online April 1, 2003

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Abstract PDF: No abstract available.

Vitamin D Receptor Gene 3' End Polymorphisms in Patients with Graves' Disease in Koreans.: Jae Kyung Hwang, Kyung Won Kim, Tae Yong Kim, Hui Su Lee, Young Joo Park, Chan Soo Shin, Do Joon Park, Kyong Soo Park, Byung Doo Rhee, Seong Yeon Kim, Hong Kyu Lee, Bo Youn Cho; J Korean Endocr Soc. 2003;18(1):12-23. Published online February 1, 2003

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Abstract PDF: BACKGROUND
The aim of this study was to evaluate the association of vitamin D receptor (VDR) gene polymorphisms with Graves' disease in Koreans. We also investigated the association of VDR gene polymorphisms with the clinical characteristics and titers of TSH receptor antibodies in patients with Graves' disease. SUBJECTS AND METHODS: The VDR gene polymorphisms were evaluated in 117 patients with Graves' disease and 156 normal controls. The polymorphisms were represented according to restriction fragment length polymorphism; Aa(ApaI), Bb(BsmI) and Tt(TaqI), with the capital letters signifying the absence, and small letters the presence of restriction sites. RESULTS: The distribution of the ApaI polymorphism genotype was: AA(17.1%), Aa(50.4%) and aa(32.5%). The BsmI polymorphism genotype distribution was: BB(7.1%), Bb(35.4%) and bb(57.5%); and the TaqI polymorphism genotype distribution was: TT(92.6%), Tt(6.2) and tt(1.2%). No significant differences in either genotypic or allelic distributions were observed, between the patients with Graves' disease and the normal controls, associated with the VDR gene polymorphisms. No significant differences were observed with age, sex, size of goiter or the presence of ophthalmopathy, in patients with Graves' disease associated with the VDR gene polymorphisms. However, the titers of the TBII were significantly higher in the aa than the Aa genotype, and were also higher in the group without the A allele than in groups with(aa 55.9+/-18.3 vs. Aa 43.2+/-23.4, p<0.05; aa 55.9+/-18.3 vs. AA and Aa 42.9+/-23.5, p<0.05). Thyroid stimulating antibodies measured with a CHO cell transfected with a wild type of human TSH receptor, were also higher in patients without the A allele than in those with(aa 620+/-829 vs. AA and Aa 353+/-306, p<0.05). The titers of the anti-thyroglobulin antibodies were significantly higher in the groups not containing the B allele than in the group that did(bb 50.9+/-42.8 vs. BB and Bb 31.9+/-38.9, p<0.05). The serum alkaline phosphatase activities were higher in the group having the b allele than in the group that did not(Bb and bb 139+/-68 vs. BB 82.2+/-15.5, p<0.05). CONCLUSIONS: The VDR gene 3' end polymorphism was not associated with susceptibility to Graves' disease in Koreans. The studies of other polymorphism sites of the VDR gene might be required to elucidate the association of VDR gene polymorphisms with Graves' disease in Koreans.

Changes in Plasma Leptin Levels Relating to Short-Term Thyroid Manipulation in Rats.: Min Seon Kim, Cho Ya Yoon, Young Min Cho, Hye Seung Jung, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Stephen R Bloom; J Korean Endocr Soc. 2002;17(2):197-205. Published online April 1, 2002

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Abstract PDF: BACKGROUND
Leptin, an adipocyte derived hormone, and thyroid hormone have similar effects on energy homeostasis, such that a shortage of both hormones is associated with decreased energy expenditure and increased body weight. Therefore, for the maintenance of energy homeostasis may require a close interaction between leptin and thyroid hormone. This study was performed to investigate the change in plasma leptin levels relating to short-term thyroid manipulation causing no significant change in body weight. METHODS: Hypothyroidism was induced by surgical thyroidectomy and hyperthyroidism by subcutaneous injection of 50 g of L-T3/100 g body weight/day, for 5 days, in 6~8 weeks old male Wistar rats. Body weights and food intakes were monitored daily until sacrifice. Plasma samples were collected, and the thyroid stimulating hormone (TSH), free triiodothyronine (T3) and leptin levels measured. The plasma leptin levels in rats with hypothyroidism and hyperthyroidism were compared with those of body weights at death and food intakes during the study, atched controls. RESULTS: The rats treated with L-T3 consumed equal amount of food as freely fed, rats but their final body weights were significantly lower (L-T3 treated 220.0 +/- 1.8 vs. freely fed 226.0 +/- 2.0 g, p<0.05). There was no difference in food intake during study, and final body weight, between the thyroidectomised rats and their paired controls (thyroidectomised 220.4 +/- 1.7 vs. paired 223.9 +/- 4.7 g, P=NS). Plasma leptin levels in the L-T3 treated rats were significantly lower than those in freely fed rats (L-T3 treated 1.7 +/- 0.1 vs. freely fed 4.8 +/- 0.2 ng/ml, p<0.005). Conversely, the thyroidectomised rats had higher plasma leptin levels, compared to those of their paired controls (thyroidectomised 4.8 +/- 0.3 vs. paired 1.7 +/- 0.1 ng/ml, p<0.005). CONCLUSION: The Plasma leptin levels in the rats were decreased by short term hyperthyroidism, while they were increased by short term hypothyroidism. These findings suggest that thyroid hormones may affect the production or secretion of leptin

Hypertensive Complications in Patients with Primary Aldosteronism.: Seong Hee Kwon, Yeong Min Cho, Heoung Kyu Park, Do Jun Park, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Yeon Cho, Hong Kyu Lee; J Korean Endocr Soc. 2002;17(1):95-103. Published online February 1, 2002

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Abstract PDF: BACKGROUND
Primary aldosteronism (PA) is believed to be a benign form of secondary hypertension due to the low incidence of hypertensive complications. Recently, several studies have shown that hypertensive complications were common in patients with PA. Therefore, we investigated hypertensive complications in 46 PA patients. METHEODS: Clinical and laboratory features of 46 46 patients were retrospectively analyzed. Hypertensive complications of this group were left ventricular hypertrophy, cerebrovascular accidents, hypertensive nephropathy and hypertensive retinopathy. RESULTS: Hypertensive complications were found in 30 (65.2%) of the 46 patients. The incidence of severe hypertension (higher than or equal to 110 mmHg in diastolic blood pressure) was 17.6%. Left ventricular hypertrophy was found in 26 (56.7%) of the 46 patients. Cerebrovascular accidents were found in 6 patients, and hypertensive nephropathy in 4 patients. The incidence of severe hypertensive retinopathy (higher than or equal to grade 3 in the Keith-Wagener Barker classification) was 17.6%. Of the 35 PA patients who underwent surgical treatment hypertension was found in 18 (51.4%). CONCLUSION: These results indicate that hypertensive complications are common in patients with PA, suggesting that early detection, treatment and close follow-up are necessary in PA.

Comparison of Treatment Modalities in Hyperprolactinemia.: Sun Hee Park, Hyeon Jeong Jeon, Do Joon Park, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2002;17(1):32-42. Published online February 1, 2002

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Abstract PDF: BACKGROUND
Prolactinomas have been treated primarily with bromocriptine, a dopamine agonists, rather than by transsphenoidal pituitary adenomectomy. However, lower success rates, as well as intolerance or resistance to medical therapy, have been reported in some recent series. The purpose of this study was to compare the effects of surgery and bromocriptine in the treatment of prolactinomas patients. Also we investigated the natural history and effects of bromocriptine on patients with idiopathic hyperprolactinemia. METHEODS: We retrospectively compared the effects of treatment with surgery and with bromocriptine in 27 idiopathic hyperprolactinemia patients, 35 microprolactinoma patients and 61 macroprolactinoma patients. RESULTS: (1) In 14 patients with untreated idiopathic hyperprolactinemia, 8 (57%) achieved remission. In patients without remission, preoperative serum prolactin level was significantly higher than patients with remission (p<0.05). In 13 patients on bromocriptine, 11 (85%) achieved remission, while the other 2, taking bromocriptine irregularly because of side effects, had persistent hyperprolactinemia. (2) In 35 patients with microprolactinoma, 11 (30%) surgery as initial therapy and surgical remission was achieved in only 5 of the 11 (45%). In 23 patients on bromocriptine, 17 (74%) achieved remission. Among the 6 patients without remission, 5 patients took bromocriptine irregularly because of side effect. (3) In 61 patients with macroprolactinoma, 49 (80%) underwent surgery as initial therapy and surgical remission was achieved in only 9 of the 49 (18%). In 50 patients on bromocriptine, 30 (60%) achieved remission. Among the 20 patients without remission, 13 took bromocriptine irregularly because of side effect and 5 were resistant to bromocriptine. CONCLUSION: In idiopathic hyperprolactinemia, the requirement for medical treatment is doubtful because of a high tendency to ward spontaneous cure. In spite of the low success rate, surgery has been used as the primary therapy for prolactinoma in Korea. And yet, medical treatment with bromocriptine is superior to surgery. However, irrgular administration of medication due to drug side effects was the main cause of the low success rate. Therefore, the necessity for new drug development is emphasized

IL-10 Plasmid DNA Delivery in NOD Mice for the Prevention of Autoimmune Pancreatic Beta Cell Destruction.: Jae Joon Koh, Kyung Soo Ko, Jong Sang Park, Won Bae Kim, Kyong Soo Park, Seong Yeon Kim, Hong Kyu Lee, San Goo Shin, Sung Wan Kim; J Korean Endocr Soc. 2000;15(2):262-271. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Recently, we have reported that biodegradable poly [-(4-aminobutyl)-L-glycolic acid] (PAGA) can condense and protect plasmid DNA from DNase I. In this study, we investigated whether the systemic administration of pCAGGS mouse IL-10 (mIL-10) expression plasmid complexed with PAGA can reduce the development of insulitis in non-obese diabetic (NOD) mice. METHODS: PAGA/mIL-10 plasmid complexes were stable for more than 60 minutes, but the naked DNA was destroyed within 10 minutes by DNase I. The PAGA/DNA complexes were injected into the tail vein of 3 week-old NOD mice. RESULTS: Serum mIL-10 level peaked at 5 days after injection, could be detected for more than 7 weeks. The prevalence of severe insulitis at 12 week-old NOD mice was markedly reduced by the intravenous injection of PAGA/DNA complex (15.7%) compared to that of naked DNA injection (34.5%) and non-treated controls (90.9%). In conclusion, systemic administration of pCAGGS mIL-10 plasmid/PAGA complexes can reduce the severity of insulitis in NOD mice. CONCLUSION: The study presents the PAGA/DNA complex has the potential for the application of the prevention of autoimmune diabetes mellitus.

The Correlation of Plasma Homocysteine and Mitochondrial DNA Content in Peripheral Blood in Healthy Women.: Soo Lim, Won Shik Shin, Kyong Soo Park, Seong Yeon Kim, Jong Ho Lee, Mi Ja Yim, Ji Hyun Song, Hong Kyu Lee; J Korean Endocr Soc. 2000;15(2):248-261. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Hyperhomocysteinemia is an independent risk factor for cardiovascular diseases. Previous reports showed that homocysteine damages mitochondrial gene expression, function and structure. In recent years, homocysteine and mitochondrial DNA (mtDNA) content are reported to relate with insulin resistance. The aim of this study is to investigate the correlation of plasma homocysteine level and mitochondrial DNA content in peripheral blood. METHODS: The mtDNA content, homocysteine and insulin resistance parameters were measured in healthy women (n=60). Plasma homocysteine level was measured by ion-exchange chromatography method and the mtDNA content in peripheral blood was measured by real time PCR method using ABI Prism 7700 machine. RESULTS: Significant correlation was found between homocysteine and mtDNA content (r=-0.507, p<0.05). Homocysteine was correlated with age (r=0.397), cholesterol (r=0.327), LDL-cholesterol (r=0.318), apolipoprotein B (r=0.387), HbA1c (r=0.274) positively and folate (r=-0.262), apolipoprotein A1 (r=-0.293), VO2max (r=-0.332) negatively. Mitochondrial DNA content was correlated with age (r=-0.535), BMI (r=-0.397), cholesterol (r=-0.340), LDL-cholesterol (r=-0.319), apolipoprotein B (r=-0.367) negatively and apolipoprotein A1 (r=0.346), lactate (r=0.307), VO2max (r=0.308) positively. All correlations were statistically significant(p<0.05). CONCLUSION: In this study, plasma homocysteine level was related with mitochondrial DNA content negatively and these two factors are estimated to be concerned with insulin resistance.

Changes of Biochemical Bone Markers and Bone Mineral Density after Hormone Replacement Therapy in Korean Women.: Kyong Soo Park, Do Joon Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Jae Hyeon Kim, Jeong Goo Kim; J Korean Endocr Soc. 2000;15(2):226-236. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Biochemical bone markers have been suggested to reflect postmenopausal high bone turnover. These markers could be useful in following response to hormone replacement therapy (HRT). But we have few studies about the sequential changes of biochemical bone markers and bone mass after HRT in Korean women, and it is unclear whether women with early menopause have different response to HRT from women with normal menopause. The aims of the present study were to see the sequential changes of biochemical bone markers and bone mass after HRT in Korean women, to examine whether a single baseline biochemical bone marker or a change in biochemical bone marker could predict subsequent bone mass, and to determine the difference of response to HRT between women with early menopause and women with normal menopause. METHODS: Postmenopausal women (n=21) were divided with into three groups according to their age at menopause (AAM): the first group with AAM < or = 43 years (early menopause group, n=7), the second group with 43 years < or = AAM < or = 50 years (n=4), and the third group with AAM > or = 50 years (normal menopause group, n=10). For the HRT, conjugated estrogen (0.625mg per day) and continuous or cyclic medroxyprogesterone (2.5-10mg per day) were administered. Bone mineral density (BMD) was measured at baseline and 12 months and biochemical bone markers were measured at baseline and 3, 6, and 12 months during HRT. RESULTS: Deoxypyridinoline, type 1 collagen N-telopeptide, bone alkaline phosphatase, and osteocalcin were significantly decreased at 3 months, and mean percent changes from baseline of bone resorption markers were larger than those of bone formation markers. At 12 months, BMD was significantly increased at lumbar spine and Ward's triangle. But BMD was not significantly increased at femur neck and femur trochanter. Two baseline bone markers (bone alkaline phosphatase and type 1 collagen N-telopeptide) correlated with changes of BMD but any changes of bone markers at 3, 6 months didn't correlate with changes of BMD. In early menopause group, changes of bone markers and BMD were larger than those in normal menopause group, but the difference between the two groups was not significant. CONCLUSION: All four bone markers showed significant reduction at 3 months, but bone resorption markers were decreased more markedly and rapidly, and some baseline bone markers can predict the change of BMD after HRT. The difference of response to HRT between early menopause group and normal menopause group was not significant.

Bone Turnover and Bone Mineral Density in Acromegaly.: Sun Wook Kim, Hee Jin Kim, Seon Hwa Lee, Won Bae Kim, Do Joon Park, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 1999;14(4):688-697. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Abnormalities of calcium homeostasis and bone remodelling were known in acromegaly, but controversy concerning the influence of chronically elevated serum growth hormone (GH)/insulin like growth factor-I (IGF-I) concentrations on bone metabolism has been existed. In this study, we assess the effect of chronically elevated serum GH/IGF-I levels on bone metabolism and bone mineral density (BMD) in patients with acromegaly and compare the markers of bone metabolism and BMD of active acromegaly according to gonadal function. METHODS: We measured biochemical markers of bone turnover and BMD in 50 acromegalic patients (41 active disease, 9 inactive disease) and 41 control subjects. RESULTS: Active acromegalic patients had significantly higher serum oteocalcin levels (13.8+/-7.7 versus 6.8+/-4.7, 6.0+/--3.4 ng/mL, p<0.05) and urinary type I cross-linked N-telopeptide (101.7+/-64.2 versus 49.3+/-33.3, 56.1+/-39.4 nM BCM/mM Cr, p<0.05) compared with inactive acromegaly and control subjects. Serum IGF-I levels correlated positively with serum osteocalcin levels(r=0.69, p<0.05) and urinary type I cross-linked N-telopeptide (r=0.44, p<0.05). In the female patients with active acromegaly, BMD (T-score) was elevated in the femoral neck(1.00+/-0.14 versus 0.89+/-0.12,p<0.05) and trochanter (0.88+/-0.15 versus 0.77+/-0.11, p<0.05), whereas BMD of lumbar spine(1.13+/- 0.17 versus 1.17+/-0.17, p>0.05) and femoral Ward's triangle (0.78+/-0.16 versus 0.77+0.13, p>0.05) were not different from those of control subjects. In the patients with active acromegaly, serum osteocalcin levels (16.4+/-8.8 versus 14.9+/-10.1 ng/mL, p>0.05) as well as urinary type I cross-linked N-telopeptide (104.8+/-68.1 versus 122.0+/-80.3 nM BCM/mM Cr, p>0.05) were not different according to gonadal function. Also, femoral and spinal BMD were not different according to the gonadal function. CONCLUSION: GH/IGF-I excess increase bone turnover and might achieve a positive bone balance at each remodelling cycle. Markers of bone turnover and BMD of skeletal bone were not influenced by gonadal function in the patients with active acromegaly.

Diagnosis of Cushing's Disease by Inferior Petrosal Sinus Sampling (IPSS): Evidence of False Negative Results.: Seon Hwa Lee, Hyeon Jeong Jeon, Sun Hee Park, Sun Wook Kim, Do Joon Park, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 1999;14(3):483-492. Published online January 1, 2001

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Abstract PDF: BACKGROUND
While inferior petrosal sinus sampling (IPSS) correctly diagnoses pituitary dependent Cushings syndrome if a significant ratio of plasma ACTH between the IPS and the peripheral blood is demonstrated, little has been said about the significance of a negative ratio in Cushings disease (e.g. false negative result). We evaluated the results of IPSS with Cushings disease, and compared them with imaging findings through transsphenoidal surgery. METHODS: 29 patients with Cushings disease underwent transsphenoidal examination of the pituitary gland from 1989 to 1998 at Seoul National University Hospital were evaluated. We compared the results of IPSS and imaging findings with sellar CT or dynamic MRI. The ratio of the ACTH concentrations at the IPS and in the peripheral blood (IPS:P ratio) and the ratio of the ACTH concentrations between the IPSs (interpetrosal ratio) were calculated before and after CRH infusion. RESULTS: With IPSS the diagnosis of Cushings disease was possible in 90% (26/29), and 3 cases in whom IPSS did not show significant IPS:P ACTH ratio were confirmed to be Cushings disease through hemihypophysectomy of lesion suspected by sellar dynamic MRI and achieved remission after operation (e.g. false negative result of diagnosis for Cushings disease by IPSS). However, accurate localization of microadenoma was achieved in only 59% (17/29). Imaging study detected microadenoma in 76% (22/29) and correctly localized in 66% (19/29). Both IPSS and imaging study precisely localized the pituitary microadenoma in 10 (34.5%) cases of 29 cases and a discrepancy between two studies existed in 7 (24.1%) cases in which the imaging study correctly localized microadenoma in 6 cases and IPSS in 1 case. CONCLUSION: Only when a significant IPS:P ACTH ratio is present can Cushings disease be established by IPSS. The absence of a significant IPS:P ACTH ratio does not necessarily imply ectopic secretion of ACfH, nor does it exclude Cushings disease. The results of lateralization by IPSS do not remove the need for transsphenoidal examination of the sella turcica because false negative result can be. IPSS and radiologic study should be complementary used in diagnosis of Cushings disease and localization of microadenoma, as IPSS can be used when sellar imaging study failed to visualize the lesion and hemihypophysectomy of suspected lesion by imaging study can be considered when IPSS did not show significant ratio of ACTH.

Activation of phosphatidylinositol 4, 5-biphosphate(PIP2) cascade by thyroid stimulating antibody.: Jae Hoon Chung, Bo Youn Cho, Jae Seok Jeon, Kyong Soo Park, Seong Yeon Kim, Hong Kyu Lee, Chang Soon Koh; J Korean Endocr Soc. 1993;8(4):422-431. Published online January 1, 2001

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Preoperative treatment of acromegaly with long-acting somatostatin analog octreotide.: Seok In Lee, Hyun Kyu Kim, Kyung Soo Ko, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Hyun Jip Kim, Heu Won Jeong, Dae Hee Han; J Korean Endocr Soc. 1993;8(1):35-41. Published online January 1, 2001

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Combined estrogen-progesterone(Divina@) treatment in postmenopausal women with special reference to serum lipoprotein patterns.: Min Seon Kim, Tae Geun Oh, Kyung Soo Ko, Kyong Soo Park, Seong Yeon Kim, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Hak Chul Jang, Yong Ki Min, In Kwon Han; J Korean Endocr Soc. 1992;7(3):267-272. Published online January 1, 2001

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Induction of puberty and spermatogenesis by pulsatile gonadotropin releasing hormone(GnRH) therapy in men with isolated hypogonadotro- pic hypogonadism(IHH) with or without anosmia.: Yong Soo Park, Kyung Soo Ko, Kyong Soo Park, Seong Yeun Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Ryoung Doo Rhee, Hak Chul Chang; J Korean Endocr Soc. 1991;6(4):332-341. Published online January 1, 2001

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