Endocrinology and Metabolism

Ho Yeon Chung (Chung HY)

17 Articles

Adrenal gland
Acromegaly with Normal Insulin-Like Growth Factor-1 Levels and Congestive Heart Failure as the First Clinical Manifestation: Hyae Min Lee, Sun Hee Lee, In-Ho Yang, In Kyoung Hwang, You Cheol Hwang, Kyu Jeung Ahn, Ho Yeon Chung, Hui-Jeong Hwang, In-Kyung Jeong; Endocrinol Metab. 2015;30(3):395-401. Published online December 9, 2014; DOI: https://doi.org/10.3803/EnM.2015.30.3.395

4,247 View
44 Download
7 Web of Science
4 Crossref

The leading cause of morbidity and mortality in patients with acromegaly is cardiovascular complications. Myocardial exposure to excessive growth hormone can cause ventricular hypertrophy, hypertension, arrhythmia, and diastolic dysfunction. However, congestive heart failure as a result of systolic dysfunction is observed only rarely in patients with acromegaly. Most cases of acromegaly exhibit high levels of serum insulin-like growth factor-1 (IGF-1). Acromegaly with normal IGF-1 levels is rare and difficult to diagnose. Here, we report a rare case of an acromegalic patient whose first clinical manifestation was severe congestive heart failure, despite normal IGF-1 levels. We diagnosed acromegaly using a glucose-loading growth hormone suppression test. Cardiac function and myocardial hypertrophy improved 6 months after transsphenoidal resection of a pituitary adenoma.

Citations

Citations to this article as recorded by

Risk of Neurodegenerative Diseases in Patients With Acromegaly
Sangmo Hong, Kyungdo Han, Kyung-Soo Kim, Cheol-Young Park
Neurology.2022;[Epub] CrossRef
Levels of Serum IGF-1, HCY, and Plasma BNP in Patients with Chronic Congestive Heart Failure and Their Relationship with Cardiac Function and Short-Term Prognosis
Zhengyi Hu, Leifang Mao, Ling Wang, Weiguo Li
Evidence-Based Complementary and Alternative Medicine.2022; 2022: 1. CrossRef
Neurofibromatosis Type 1 with Concurrent Multiple Endocrine Disorders: Adenomatous Goiter, Primary Hyperparathyroidism, and Acromegaly
Shigemitsu Yasuda, Ikuo Inoue, Akira Shimada
Internal Medicine.2021; 60(15): 2451. CrossRef
Metformin stimulates IGFBP-2 gene expression through PPARalpha in diabetic states
Hye Suk Kang, Ho-Chan Cho, Jae-Ho Lee, Goo Taeg Oh, Seung-Hoi Koo, Byung-Hyun Park, In-Kyu Lee, Hueng-Sik Choi, Dae-Kyu Song, Seung-Soon Im
Scientific Reports.2016;[Epub] CrossRef

A Case of Fulminant Type 1 Diabetes Mellitus with Human Leukocyte Antigen DR4-DQ4.: Ye Ri So, Ja Won Koo, Young Hak Cho, You Cheol Hwang, Kyu Jeung Ahn, Ho Yeon Chung, In Kyung Jeong; Endocrinol Metab. 2012;27(4):314-317. Published online December 20, 2012; DOI: https://doi.org/10.3803/EnM.2012.27.4.314

1,647 View
20 Download

Abstract PDF: The clinical characteristics of fulminant type 1 diabetes are abrupt onset of disease, very short (<1 week) duration of diabetic symptoms, ketoacidosis at diagnosis, negativity for islet-related autoantibodies, virtually no C-peptide secretion (fasting plasma C-peptide <0.3 ng/mL), a near normal hemoglobin A1c (HbA1c) level and an elevated serum pancreatic enzyme level. The pathogenesis has not yet been clarified, however the involvement of both genetic background and viral infections has been suggested. We reported a case of fulminant type 1 diabetes. A 37-year-old woman was admitted with stuporous consciousness to our hospital. Four days prior to the admission, she was hospitalized with the diagnosis of acute pancreatitis in another hospital, and at that time her glucose level was 79 mg/dL. Three days after the hospitalization, her state of consciousness became stuporous and she was transferred to our hospital. The laboratory results were as follows: pH 6.94, glucose 1,602 mg/dL, and HbA1c 5.5%. She was negative for islet-related autoantibodies and viral antibodies. HLA haplotypes were DRB1*04:05/*04:06, DQB1*03:02/*04:01 which might be a considerable risk allele for fulminant type 1 diabetes. She was diagnosed with fulminant type 1 diabetes, and has been treated with multiple component insulin regimens.

A Case of Primary Adrenal Insufficiency in a Patient with Acquired Immunodeficiency Syndrome.: Jae Ho Choi, Suk Chon, Yu Chul Hwang, Jun Seong Son, Seung Joon Oh, Kyu Jeung Ahn, Ho Yeon Chung, Jeong Taek Woo, Sung Woon Kim, Jin Woo Kim, Young Seol Kim, In Kyung Jeong; Endocrinol Metab. 2011;26(3):253-257. Published online September 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.3.253

2,132 View
24 Download
1 Crossref

Abstract PDF

The adrenal gland is the most commonly involved endocrine organ in patients infected with the human immunodeficiency virus (HIV). Adrenal function abnormality is more common in HIV patients than in the general population. It is important to recognize the condition of adrenal insufficiency, as this adrenal disorder may prove fatal if left untreated. Herein, we report a case of primary adrenal insufficiency in a 37-year-old male patient with acquired immunodeficiency syndrome. The patient complained of fever, general weakness, and fatigue. Impaired adrenal function was noted in the rapid ACTH stimulation test. After steroid supplementation, the patient's symptoms were improved. Therefore, HIV care physicians should ascertain adrenal dysfunction in HIV patients when they complain of fever and general weakness.

Citations

Citations to this article as recorded by

A Case Report of Adrenal Insufficiency Treated with Korean Medicine
Young-ji Kim, Jung-yeon Kwon, Ho-yeon Go, Kyung-hwan Kong
The Journal of Internal Korean Medicine.2017; 38(5): 583. CrossRef

A Case of Adrenocortical Carcinoma Secreting Cortisol, Androgen and Aldosterone.: Jae Ho Choi, Ye Ri So, Yu Chul Hwang, In Kyung Jeong, Kyu Jeung Ahn, Ho Yeon Chung, Seung Ae Yang; Endocrinol Metab. 2011;26(3):239-242. Published online September 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.3.239

2,081 View
30 Download
1 Crossref

Abstract PDF

Primary adrenocortical carcinoma is a rare tumor, and is characterized by a peri-tumor mass effect and hormone excess signs. Adrenocortical carcinoma most commonly secretes cortisol, but tumors that secrete other adrenal hormones (aldosterone, androgen) are rare. Herein, we report the case of a 70-year-old woman with cortisol, androgen, and aldosterone-secreting adrenal carcinoma. The patient complained of generalized weakness, moon face, and central obesity. On laboratory examination, hypokalemia and metabolic alkalosis was detected. On the hormone test, cortisol, DHEA-S, and aldosterone were all increased. Abdominal CT showed a large right adrenal mass. She underwent right adrenalectomy and the histology revealed the presence of an adrenocortical carcinoma. After adrenalectomy, the patient was treated with hydrocortisone and mitotane.

Citations

Citations to this article as recorded by

A Case of Adrenocortical Carcinoma Secreting Cortisol and Aldosterone
Jiyoon Ha, Min Kyung Kim, Yoon Jin Cha, Seung Kyu Kim, Gi Young Yun, Kwangwon Rhee, Joon Seong Park, Eun-Suk Cho, Chul Woo Ahn, Jong Suk Park
Yeungnam University Journal of Medicine.2012; 29(2): 132. CrossRef

Osteoporosis Diagnosis and Treatment 2007.: Ho Yeon Chung; J Korean Endocr Soc. 2008;23(2):76-108. Published online April 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.2.76

1,879 View
43 Download
23 Crossref

Abstract PDF

No abstract available.

Citations

Citations to this article as recorded by

Preliminary Study on the Osteoporosis Improvement Effect of Compounds Isolated from Oryza sativa L. root Extract in the Ovariectomized Mouse Model
Seon-Hee Kim, Eun-Yong Choi, Hee-Jin Yang, Jun Sang Bae
Journal of Physiology & Pathology in Korean Medicine.2023; 37(2): 30. CrossRef
Sex-specific bi‑directional association between osteoporosis and depression from the national representative data of South Korea
Min Kyoung Shin, Hyejin Kim, Soo-Hee Choi, Beom-Jun Kim, Obin Kwon
Scientific Reports.2022;[Epub] CrossRef
Effects of Herbal Medicines on Osteoporosis in Rheumatoid Arthritis: Study Protocol for a Systematic Review and Meta-Analysis
Do Young Kwon, Ji Hyang Gu, Eun Jung Lee
Journal of Korean Medicine Rehabilitation.2022; 32(3): 77. CrossRef
Development and Effect Analysis of UVB-LED General Lighting to Support Vitamin D Synthesis
Seung-Taek Oh, Jae-Hyun Lim
Applied Sciences.2020; 10(3): 889. CrossRef
Effect of Cheongawongagam Extract on the Ovariectomized Rat Model of Osteoporosis
Gee Won Yun, Hyun Lee
Journal of Physiology & Pathology in Korean Medicine.2020; 34(1): 14. CrossRef
Survey on Usage of Korean Quantitative Ultrasound for Proposing Quantitative Ultrasound Quality Control Guideline
Jeong Yoon-Ji, Kim Mi-Jeong, Lee Seung-Youl, Lee Tae-Hee, Seoung Youl-Hun
Journal of Radiological Science and Technology.2018; 41(4): 329. CrossRef
Comparison of the Effects of Deer Antler, Old Antler, and Antler Glue on Osteoporosis in Ovariectomized Rats
Hae In Park, Kwang Ho Lee
Journal of Acupuncture Research.2018; 35(1): 21. CrossRef
Influence of Cortical Endplates on Ultrasonic Properties of Trabecular Bone
Yoon Mi Kim, Kang Il Lee
Journal of the Korean Society for Nondestructive Testing.2015; 35(2): 103. CrossRef
Inhibitory Effects of on Osteoclast Differentiation and Bone Resorption
Jeong Ju Lee, So Hyun Jo, Min Cheol Park, Eun Heui Jo
The Acupuncture.2015; 32(3): 27. CrossRef
Factor Analysis of Biochemical Markers Associated with Bone Mineral Density in Adults
Jae-Hwan Cho, Min-Tae Kim, Hae-Kag Lee, In-Sik Hong, Hyon-Chol Jang
Journal of Physical Therapy Science.2014; 26(8): 1225. CrossRef
The Association between Changes in Food and Nutrient Intakes and Changes in Bone Metabolic Indicators in Postmenopausal Women with Osteopenia after a 12-week Intervention of Nutrition Education and Aerobic Exercise
Seo-Jin Kim, Suh-Jung Kang, Yoon Jung Park, Ji-Yun Hwang
Korean Journal of Community Nutrition.2013; 18(3): 213. CrossRef
Omega-3 and Menopause
Tae-Hee Kim, Dong Won Byun, Yongsoon Park
The Journal of Korean Society of Menopause.2012; 18(2): 75. CrossRef
Comparative Study of Osteoporosis Treatment of Elderly Patients with Degenerative Osteoarthritis of the Knee Joints, according to the Korean Health Insurance Review & Assessment Service Criteria versus the FRAX® Criteria
Su Chan Lee, Chang Hyun Nam, Ji Yeol Yoon, Kwang Am Jung, Bo Hyun Hwang, Hye Sun Ahn
Journal of the Korean Orthopaedic Association.2012; 47(5): 368. CrossRef
Dependences of Ultrasonic Parameters for Osteoporosis Diagnosis on Bone Mineral Density
Kyo Seung Hwang, Yoon Mi Kim, Jong Chan Park, Min Joo Choi, Kang Il Lee
Journal of the Korean Society for Nondestructive Testing.2012; 32(5): 502. CrossRef
The Beneficial Effect of Leisure-Time Physical Activity on Bone Mineral Density in Pre- and Postmenopausal Women
Kyee-Zu Kim, Aesun Shin, Jeonghee Lee, Seung-Kwon Myung, Jeongseon Kim
Calcified Tissue International.2012; 91(3): 178. CrossRef
The Clinical Significance of Adjacent Rib Involvement on MRI in Patients with Acute Osteoporotic Compression Fractures of the Thoracic Spine
Hyun-Joo Kim, Jae Hyun Kim, Kui Hyang Kwon, Deuk Lin Choi, Won Kyung Bae, Dong Erk Goo, You-Sung Suh
Journal of the Korean Society of Radiology.2012; 66(5): 473. CrossRef
A Case of Multiple Osteoporotic Compression Fractures in Young Man with Budd-Chiari Syndrome
Sun Hwa Kim, Tae Un Yang, Byeong Kwang Choi, Hye Jin Yoo, Ji A Seo, Kyung Mook Choi, Nan Hee Kim, Sin Gon Kim, Sei Hyun Baik, Dong Seop Choi, Hae Yoon Choi
Endocrinology and Metabolism.2012; 27(4): 334. CrossRef
Effect of Pig Skin Gelatin Hydrolysates on the Bone Mineral Density of Ovariectomized Rats
Jeong-Eun Park, Jun-Sang Ham, Hey-Kyung Kim, Chi-Ho Lee, Dong-Wook Kim, Kuk-Hwan Seol, Mi-Hwa Oh, Dong-Hun Kim, Ae-Ra Jang
Korean Journal for Food Science of Animal Resources.2012; 32(2): 234. CrossRef
The relationship between the bone mineral density and urinary cadmium concentration of residents in an industrial complex
Minah Shin, Domyung Paek, Chungsik Yoon
Environmental Research.2011; 111(1): 101. CrossRef
Prevalence, Pathophysiology, Screening and Management of Osteoporosis in Gastric Cancer Patients
Jung Sub Lim, Jong-Inn Lee
Journal of Gastric Cancer.2011; 11(1): 7. CrossRef
Relationship between vitamin K status, bone mineral density, and hs-CRP in young Korean women
Misung Kim, Heeseon Kim, Cheongmin Sohn
Nutrition Research and Practice.2010; 4(6): 507. CrossRef
Analysis of Risk Factors for Low Bone Mineral Density in Patients with Inflammatory Bowel Disease
Jae Jung Park, Sung-Ae Jung, Young Wook Noh, Min-Jung Kang, Ji Min Jung, Seong-Eun Kim, Hye-Kyung Jung, Ki-Nam Shim, Tae Hun Kim, Kwon Yoo, Il Hwan Moon, Young Sun Hong
The Korean Journal of Gastroenterology.2010; 55(4): 237. CrossRef
Restoration of Bone Turnover Rate After Decompression Surgery in Patients With Symptomatic Lumbar Spinal Stenosis
Ho-Joong Kim, Hwan-Mo Lee, Heoung-Jae Chun, Kyoung-Tak Kang, Hak-Sun Kim, Jin-Oh Park, Eun-Su Moon, Kwang-Hwan Park, Seong-Hwan Moon
Spine.2009; 34(18): E635. CrossRef

A Case of Type I Osteogenesis Imperfecta Differentially Diagnosed as a Cause of a Spinal Compression Fracture.: Sang Youl Rhee, Soo Young Moon, Suk Chon, In Kyung Jeong, Seungjoon Oh, Kyu Jeung Ahn, Ho Yeon Chung, Jeong Taek Woo, Sung Woon Kim, Young Seol Kim, Jin Woo Kim; J Korean Endocr Soc. 2007;22(6):446-452. Published online December 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.6.446

1,840 View
21 Download

Abstract PDF: Osteogenesis imperfecta (OI) is a genetic disease that is caused by a synthetic anomaly of type I collagen. It is characterized by such features as low bone density, multiple fractures, bone deformities and chronic bone pain. According to the hereditary pattern and degree of phenotypical expression, it also has various extraskeletal manifestations such as blue sclera, hearing deformities and dentinogenesis imperfecta. Recently, an expanded seven subgroup classification of OI has been suggested by means of its clinical severity and mutational characteristics. However, most of the OI cases reported in Korea have been classified as type II or III that can be diagnosed easily and present with severe clinical manifestations. Only rare type I OI cases have been currently reported in Korea. Herein, we report a case of type I OI that was differentially diagnosed as a cause of a spinal compression fracture.

A Case of Osteomalacia Caused by Severe Vitamin D Deficiency.: Seok Yeon Kim, Sang Youl Rhee, Soo Young Moon, Suk Chon, In Kyung Jeong, Seungjoon Oh, Kyu Jeung Ahn, Deog Yoon Kim, Ho Yeon Chung, Sung Woon Kim, Jin Woo Kim, Young Seol Kim, Jeong Taek Woo; J Korean Endocr Soc. 2007;22(1):55-61. Published online February 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.1.55

2,056 View
52 Download
1 Crossref

Abstract PDF

Vitamin D is a kind of hormone that can be synthesized in the skin or it is supplied in the diet it is involved in a central role in bone and calcium homeostasis in vivo. Metabolic bone diseases such as rickets in children and osteomalacia in adults can also be caused by deficiency or metabolic defects in the vitamin D hormone related system. However, there has been a lack of generalized epidemiologic studies about the vitamin D deficiency status in Koreans. We recently experienced a case of osteomalacia caused by severe vitamin D deficiency. These kinds of case have not been reported elsewhere in Korea for the last twenty years.

Citations

Citations to this article as recorded by

A Case of Nutritional Osteomalacia in Young Adult Male
Choong-Kyun Noh, Min-Jeong Lee, Bu Kyung Kim, Yoon-Sok Chung
Journal of Bone Metabolism.2013; 20(1): 51. CrossRef

RANK-Fc Gene Therapy in Mouse Model of Osteoporosis.: Ho Yeon Chung; J Korean Endocr Soc. 2006;21(3):189-191. Published online June 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.3.189

1,432 View
18 Download

Abstract PDF: No abstract available.

The Postpartum Recurrence of Graves'Disease and its Contributing Factors.: Chang Hoon Yim, Hyun Ah Choi, Seung Suk Han, Hae Sung Kim, Chang Uk Lee, Ho Yeon Chung, Ki Ok Han, Hak Chul Jang, Won Keun Park, Hyun Ku Yoon, In Kwon Han; J Korean Endocr Soc. 2002;17(2):189-196. Published online April 1, 2002

1,163 View
32 Download

Abstract PDF: BACKGROUND
Pregnancy affects the course of Graves' Disease (GD), and patients who initially maintain euthyroid function into their middle trimester with minimum doses of antithyroid drugs become exacerbated after delivery. Even patients who are completely cured, requiring no treatment during pregnancy, can relapse after delivery. In this study, we examined the postpartum changes in the thyroid functions of patients with GD, and attempted to determine the factors contributing to these changes. METHODS: The study subjects were recruited from pregnant women visiting our outpatient clinic for routine prenatal evaluations. 45 women previously diagnosed with GD, who had been treated and cured with hyperthyroidism, and were no longer taking any thyroid medications, were evaluated for 1 year post delivery. RESULTS: Among 45 patients, 20 (44.4%) developed thyroid disorders following delivery. Postpartum thyroiditis (PPT) developed in 8 patients (17.8%), and GD developed in 12 (26.0%). The onset of the PPT disease 3.1 +/- 1.4 months following delivery, which was significantly earlier than the 6.7 +/- 2.7 months required for the post delivery onset of GD (p=0.003). The TBII values, measured during the thyrotoxic state in each womaen, were negative in women with PPT and positive in 71.4% of women with GD (p=0.030). The duration of treatment for hyperthyroidism prior or pregnancy, the number of recurrences, and the time interval without treatment, were not associated with the development of postpartum thyroid disorders. Whereas, the mean number of past pregnancies for women who developed PPT was 3.9 +/- 2.1, and was significantly higher than the 2.2+/- 1.7 for women developing no thyroid dysfunctions (p=0.044). In 13 women their initial onset of GD occurred within one year postpartum, 7 (53.8%) having had a recurrence, which was significantly higher than in women whose disease onset occurred unrelated to delivery (5 of 32 women: 15.6%). CONCLUSION: Women with GD developed postpartum thyroid dysfunctions in 44.4% of cases. Women whose initial disease onset occurred within one year postpartum had higher recurrences of GD, and women who developed PPT had a history of higher gravidity compared to the euthyroid women postpartum. Therefore, if women with GD develop postpartum thyroid dysfunctions, the diagnosis should be made, and a treatment modality planned, following careful considerations of the patients' past obstetric history, changes in clinical manifestations and the TBII values.

Prevalence of Thyroid Nodules detected by Ultrasonography in Womens Attending Health Check-Ups.: Chang Hoon Yim, Han Jin Oh, Ho Yeon Chung, Ki Ok Han, Hak Chul Jang, Hyun Ku Yoon, In Kwon Han, Byoung Hee Han, Kyung Sang Lee, Byung Jae Cho; J Korean Endocr Soc. 2002;17(2):183-188. Published online April 1, 2002

1,258 View
26 Download

Abstract PDF: BACKGROUND
Thyroid nodules are commonly found in clinical practice, and the recent development of thyroid ultrasonography has allowed for the detection of small nodules previously undetectable by routine palpations. Since previous studies on thyroid ultrasonography have been focused on patients with known thyroid disorders, we aimed to determine the prevalence of thyroid nodules in a female population. METHODS: We studied women in the age range 30 to 70 years visiting the health promotion center at Samsung Cheil Hospital for routine health check-ups. After excluding patients with previous thyroid disorders, 1300 women where selected to undergo thyroid ultrasonography for the detection of the presence of thyroid nodules. If nodules were found, their size and numbers were recorded, and these data correlated with the patients age. RESULTS: Of the 1300 subjects, thyroid nodules were detected in 490 (37.7%) with their prevalence (p=0.009), and that of multinodularity of thyroid nodules (p=0.001), increasing with the increasing age of the patients (Age 30 to 39: 30.8%, 40 to 49: 37.0%, 50 to 59: 41.5% and 60 to 69: 65.2%). Among these study subjects, nodules larger than 15 mm in size were detected in 29 and after performing fine needle aspirations on 18 nodules, 17 were found to be benign, with 1 papillary carcinoma, which required a total thyroidectomy. CONCLUSION: The prevalence of thyroid nodules in our female study population was 37.7%, with their prevalence, and that of multinodularity of thyroid nodules, increasing with increased age.

Thyroid Dysfunction after Abortion.: Chang Hoon Yim, Hyun Ah Choi, Ho Yeon Chung, Ki Ok Han, Hak Chul Jang, Hyun Ku Yoon, In Kwon Han; J Korean Endocr Soc. 2001;16(2):252-259. Published online April 1, 2001

981 View
16 Download

Abstract PDF: BACKGROUND
Postpartum thyroiditis is an autoimmune thyroid dysfunction that occurs in the first year after a delivery. Although a postpartum thyroid dysfunction after a full-term pregnancy is well described, little is known about its association with an abortion. The purpose of this study was to investigate the clinical and laboratory findings in thyroid dysfunction that develops after abortion and to investigate the differences in the clinical course according to the types of abortion. METHODS: Thirty patients who were proven to have thyroid dysfunction after either spontaneous or an elective abortion were studied. We analyzed their past history, the type of abortion, their clinical features, the laboratory findings and the courses of the disease. RESULTS: Seventeen patients were hypothyroid and 13 were thyrotoxic at the time of the initial thyroid function evaluation. In the thyrotoxic group, the T3 and free T4 were significantly higher but the TSH was lower than in the hypothyroid group. The titers of antimicrosomal and antithyroglobulin antibody were not different between the two groups. In the thyrotoxic group, 3 cases showed normal values, 2 cases were hypothyroid and the remaining 8 cases were persistently thyrotoxic during the 2 months of observation. TSH receptor antibodies were absent in all of the transient thyrotoxic patients, but they were present in 83.3% of the persistent thyrotoxic patients. The clinical manifestations of the thyroid dysfunction were not different according to the type of abortion. CONCLUSION: Reproductive-age women who have an abnormal thyroid function require careful history taking with respect to their history of regarding parturition or abortion in order to evaluate the possibility of a transient thyroid dysfunction after the abortion.

The Regulation of OPG/OCIF mRNA Epression by IL-1beta in Peripheral Blood Mononuclear Cells.: In Gul Moon, Ho Yeon Chung, Chang Sun Hwang, Young Soon Kang, Mi Sun Chung, Han Jin Oh, Kyu Hong Choi, Sun Woo Kim, Eui Hyun Kim, Youn Yee Kim, Chang Hoon Yim, Ki VOk Han, Hak Chul Jang, Hyun Koo Yoon, In Kwon Han; J Korean Endocr Soc. 2000;15(2):204-213. Published online January 1, 2001

1,004 View
17 Download

Abstract PDF: BACKGROUND
Osteoprotegerin(OPG) is a soluble member of the tumor necrosis factor(TNF) receptor family and inhibits osteoclastogenesis by interrupting the cell-to-cell interaction between osteoblastic/stromal cells and osteoclast progenitors. OPG is expressed in many tissues including osteoblasts and may act on bone tissues in a paracrine and/or autocrine fashion. Futhermore, many cytokines and growth factors are known to influence the regulation of OPG expression in osteoblastic/stromal cells. The aims of the present study were to examine whether or not OPG was expressed in human peripheral blood mononuclear cells(PBMCs) and to investigate the effects of IL-1beta, which were known as potent osteotropic agents, on the regulation of OPG mRNA in PBMCs. METHODS: PBMCs were isolated by centrifugation over Ficoll-Hypaque density gradients from postmenopausal women and cultured in 6-well plates containing alpha-MEM supplemented with 5% FBS. The expression of OPG mRNA in PBMCs was observed by RT-PCR in adherent and nonadherent cells on culture plates. To observe the effect of OPG expression by IL-1beta, we measured the concentration of OPG mRNA by altering the concentration and incubation time of IL-1beta. The measurement of OPG mRNA was done by semi-quantitative PCR and indicated as OPG/GAPDH. RESULTS: OPG was expressed both in cells attached to the surface of culture plates and in non-adherent cells for the incubation of peripheral blood mononuclear cells. The effect of OPG mRNA by IL-1beta tend to increase in accordance with the length of incubation time and maximizes at 12 hours of incubation time and shows 1.2-3.5 times higher than the standard level at the concentration of 0.5ng/ml. However, the increased quantity in concentration varies according to individuals.] CONCLUSION: OPG mRNA is expressed in peripheral blood mononuclear cells and known to be increased by IL-1beta.

Association of Estrogen Receptor Genotypes with Serum Lipids and Responsiveness of Serum Lipids to Hormonal Replacement Therapy in Korean Postmenopausal Women.: So Ra Park, Jae Eun Park, Chung Kyu Hwang, Phil Ho Jung, Chang Hoon Yim, Ho Yeon Chung, Ki Ok Han, Hyun Ku Yoon, Hak Chul Jang, In Kwon Han; J Korean Endocr Soc. 1999;14(3):553-561. Published online January 1, 2001

1,057 View
16 Download

Abstract PDF: BACKGROUND
Several biologically plausible mechanisms have been proposed for estrogen-mediated caridoprotection, including estrogen-assocaited changes in lipid metabolism and endothelial function of vessel walls. These effects are thought to be mediated via estrogen receptor (ER). Relationships between ER polymorphisms and serum lipid levels were not investigated enoughly. METHODS: Three restriction fragment length polymorphisms (RFLPs) at the ER gene locus, represented as B-variant, PvuII and XbaI, and their relationship to serum lipid levels were examined in 318 postmenopausal women. Their mean age was 54.5+/-6.5 years (mean+SD). An association between ER genotypes and changes in lipid levels after 1 year of estrogen replacement therapy was also investigated in follow-up 251 women. RESULTS: The B-variant was not found in Korean women. The distribution of the PvuII and XbaI polymorphisms was as follows: PP 109 (34%), Pp 166 (52%), pp 43 (14%), and XX 204 (64%), Xx 95 (30%), xx 19 (6%). Significant relationship was found between genotypes and changes in serum total cholesterol levels after lyr estrogen replacement therapy. There was no significant relationship between ER genotypes and changes in HDL cholesterol, LDL cholesterol and triglyceride levels after estrogen therapy. CONCLUSION: These data indicate that these polymorphisms are possible predictor on lipid response to estrogen replacement therapy.

Serum Fluoride Level in Normal Adult Women and Changes in Serum Fluoride Level after Disodium Monofluorophosphate Administration.: Hyun Koo Yoon, Mi Sun Jung, In Kul Moon, Sang Woo Kim, Ho Yeon Chung, Ki Ok Han, Hak Chul Jang, In Kwon Han, Hun Ki Min; J Korean Endocr Soc. 1997;12(4):565-570. Published online January 1, 2001

945 View
18 Download

Abstract PDF: BACKGROUND
Since the morning fluoride level of 10 uM is recommended for adults patients being treated for osteoporosis so far, measurement of serum fluoride level is important to detect abnormally high levels or to detect levels below the therapeutic windows. Aims of this study are to determine the normal range of serum ionic fluoride levels in Korean female adults (from 5th to 7th decade), and to evaluate the in vivo fluoride pharmacokinetics of monofluorophosphate in Korean adults. METHODS: Serum level of fluoride was measured from blood samples of 72 female subjects (age 43-69years) using an ion selective electrode. For pharrnacokinetics of monofluorophosphate-calcium (MFP-Ca), 6 subjects (age 27~45 years) were included to be withdrawn the blood hourly for the first S hours and the blood was withdrawn at 24 hours after a single dose of MFP-Ca. RESULTS: Mean level of serum fluoride was 1.64+-0.12uM in 5th, 6th, 7th decades adults, and there was no difference of serum fluoride levels among age groups. Peak serum fluoride level exhibited 5.02+-0.67pM, and returned to basal level on 24 hours after a single dose of MFP-Ca. CONCLUSION: This study shows that mean serutn fluoride of Korean female adults (from 5th to 7th decade) is not different from that of other reports, and a single dose of MFP-Ca does not cause serum fluoride levels above the recommended therapeutic windows of 5-10uM for 24 hours.

Non-association of Pvull and Xval Estrogen receptor Genotypes with Bone Mineral Density and Bone Markers in Korean Premenopausal Women.: Hyun Koo Yoon, Ho Yeon Chung, In Gul Moon, Chang Hoon Yim, Sang Woo Kim, Ki Ok Han, In Kwon Han, Hun Ki Min, Dong Won Suh, Dong Hee Cho, Bo Kyung Park, Jong Tae Choi; J Korean Endocr Soc. 1997;12(2):207-214. Published online January 1, 2001

1,143 View
17 Download

Abstract PDF: BACKGROUND
Bone mineral density (BMD) is under strong genetic control. A recently reported case of severe estrogen resistance caused by a germ-line mutation at the estrogen receptor gene locus suggests the possibility that other variants of the estrogen receptor (ER) gene could be responsible for the heritable components of bone density. METHODS: Two restriction fragment length polymorphisms (RFLPs) at the ER gene locus, represented as PvuII and XbaI, and their relationship to bone mineral density (BMD) and bone turnover markers were examined in 95 healthy premenopausal women. Their mean age was 29 +-6.9 years (mean+-SD). RESULTS: The distribution of the PvuII and XbaI RFLPs was as follows: PP 20 (21.1%), Pp 40 (42.1%), pp 35 (36.8%), and XX 5 (5.3%), Xx 33 (34.7%), xx 57 (60.0%) (capital letters signify the absence of, and lower case letters signify the presence of the restriction site of each RFLP). There was no significant relation between ER genotypes and BMD measured at several sites such as lumbar spine (L2-4), distal forearm, and femoral neck. Also no significant genotypic differences were found in the several biochemical markers and sex hormone status. CONCLUSION: These data indicate that these polymorphisms are not predietive of bone turnover nor BMD in a sample of healthy Korean premenopausal women.

Effect of Dexamethasone and Deflazacort on the Function and Gene Expression of the Primary Cultured Human Osteoblast-Like Cells.: Hyun Koo Yoon, In Myung Yang, Sung Woon Kim, Soung Seol Kim, Young Kil Choi, Ho Yeon Chung, Young Soon Kang, In Gul Moon, Chang Hoon Yim, Sang Woo Kim, Ki Ok Han, Hak Chul Chang, In Kwon Han; J Korean Endocr Soc. 1996;11(4):479-491. Published online November 7, 2019

1,187 View
32 Download

Abstract PDF: Background
Chronic use of glucocorticoid is known to result in osteoporosis. Deflazacort (DFZ), a synthetic glucocorticoid, has been reported to have bone sparing properties in vivo eompared to dexamethasone(DEX). Not only the direct effect of DFZ on human osteoblast but the mechanism by which the drug spares bone remains unclear. This study, therefore, is aimed to investigate the direct effect of DFZ on the proliferation and differentiation of human osteoblast as well as on the gene expression of osteocalcin and osteoblast as well as on the gene expression of osteocalcin and growth factor produced in osteoblast. Methods: Human osteoblast-like cells were cultured from a piece of the tibia removed during selective orthopedic surgery for patients without metabolic bone diseases. The morphological iden- tification of osteoblast-like cell was performed under the light microscope after alkaline phosphatase staining. Cell proliferation rate was determined by [3H] thymidine incorporation into DNA. Cell differentiation was determined by alkaline phophatase activity. mRNA expression was quanti- tatively measured by the competitive reverse transcription-polymerase ehain reaction(RT-PCR). Results: The cultured cells demonstrated 1,25-dihydroxyvitamin D3-induced increases in alkaline phophatase activity and osteocalcin mRNA expression which are the properties of osteoblast. Twenty six percent of the cultured cells were identified as osteoblast-like cells by alkaline phophatase staining. After 24hr incubation with DEX or DFZ, the [3H) thymidine incorporation was significantly inhibited by 100nM DEX or DFL Alkaine phophatase activity was significantly increased by 100nM DEX. Osteocalcin mRNA was significantly decreased by both glueocorticoids. While DEX significantly suppressed expression of asteocalcin mRNA at 10nM and 100nM, DFZ did so only at 100nM. IGF-I mRNA was significantly decreased by 100nM DEX. Conclusion: These results suggest that the inhibitory effect of DFZ on the cell proliferation and protein synthesis is less than that of DEX, which might be responsible for the bone sparing effect of DFZ in vivo.

A Case of Subclinical Hypothyroidism Associated with Turner's Syndrome.: In Kwon Han, Jung Gil Lee, Sun Wha Lee, Seong Kyu Lee, Chan Moon Pak, Ho Yeon Chung; J Korean Endocr Soc. 1994;9(1):35-38. Published online November 6, 2019

1,254 View
20 Download

Abstract PDF: Recently it is known that Turner's syndrome is frequently associated with hypothyroidism. We report a case of Turner's syndrome associated with subclinical hypothyroidism. A 23-year-old female was admitted to the hospital with complaints of amenorrhea and short stature. She had a mosaicism of 45, X0/46, Xi(X_q) in the cell, cultured from the peripheral blood. The plasma thyroxine and triiodothyronine were normal and there was no clinical symptom of hypothyroidism. But the thyroid-stimulating hormone(TSH) concentration was unusually higher(184 uU/L). She has been treated with the cyclic therapy of conjugated estrogen and medroxyprogesterone, in addition to the thyroxine replacement therapy. After 2 months, the menstruation was restored and TSH was normalized.

Author index