Endocrinology and Metabolism

Won Jun Kim (Kim WJ)

3 Articles

Isolation of Density Enrichment Fraction of Adipose-Derived Stem Cells from Stromal Vascular Fraction by Gradient Centrifugation Method.: Min Kyung Kim, Yong Soon Park, Hee Soon Park, Jung Mook Choi, Won Jun Kim, Se Eun Park, Eun Jung Rhee, Cheol Young Park, Won Young Lee, Ki Won Oh, Sung Woo Park, Sun Woo Kim, Kwang Sik Suh, Jeong Taek Woo; Endocrinol Metab. 2010;25(2):103-109. Published online June 1, 2010; DOI: https://doi.org/10.3803/EnM.2010.25.2.103

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BACKGROUND
Adipose tissues include multipotent cells, the same as bone marrow-derived mesenchymal stem cells. The stromal vascular fractions (SVFs) from adipose tissues represent a heterogeneous cell population. The purpose of this study was to isolate and purify adipose-derived stem cells (ASCs) in SVFs by the density gradient method. METHODS: SVFs were extracted from the subcutaneous, epididymal, mesenteric and retroperitoneal adipose tissue of 8 weeks old male Sprague-Dawley rats (n = 15) and these were separated into 4 layers according to a Nycodenz gradient (Fx-1: < 11%, Fx-2: 11-13%, Fx-3: 13-19% and Fx-4: 19-30%). The post-confluent SVFs were cultured in adipogenic medium for 2 days, in insulin medium for 2 days and in 10% fetal bovine serum medium for 5 days. To observe lipid droplets in SVFs, we performed Oil Red O staining. RESLTS: The SVFs' cellular fractions (Fx-1, Fx-2, Fx-3 and Fx-4) were isolated by density gradient centrifugation from the adipose tissues of rats. The SVFs extracted to fraction 3 (Fx-3) had the most abundant cells compared to that of the other fractions. However fraction 1 (Fx-1) or 2 (Fx-2) had a superior ability to make lipid droplets. The adipogenic differentiation of Fx-1 or 2 was higher than that of the unfractionated cells. The SVFs extracted from retroperitoneal adipose tissue had the highest efficiency for adipogenic differentiation, whereas the SVFs from mesenteric adipose tissue did not differentiate. CONCLUSION: This density gradient fractionated method leads to efficient isolation and purification of cells with the characteristics of ASCs.

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Embolic Infarction Presented after Intravenous Injection of Stromal Vascular Fraction
Jin Young Seo, Ju-Hun Lee, Hong-Ki Song, Jong Seok Bae, Yerim Kim
Journal of Neurosonology and Neuroimaging.2018; 10(2): 181. CrossRef

A Case of Pseudohypoparathyroidism Worsened by Rhabdomyolysis.: Won Jun Kim, Sin Je Moon, Hye Young Kim, Chang Beom Lee; J Korean Endocr Soc. 2009;24(3):195-200. Published online September 1, 2009; DOI: https://doi.org/10.3803/jkes.2009.24.3.195

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Abstract PDF

The term pseudohypoparathyroidism describes a rare disorder characterized by resistance to the action of immunoreactive parathyroid hormone (PTH) in peripheral tissue rather than a deficiency of PTH. Patients present with tetany, spasm, hypocalcemia, hyperphosphatemia, and Albright's hereditary osteodystrophy (AHO). We present a case of symptomatic hypocalcemia due to pseudohypoparathyroidism aggravated by rhabdomyolysis. A 21-year-old man presented with tetany, AHO phenotypes and an ankle infection. Rhabdomyolysis was confirmed by marked elevation of serum creatine phosphokinase, more than 10 times above normal. Spasm was observed and the serum value of total calcium was as low as 3.7 mg/dL and that of phosphate was as high as 7.0 mg/dL, and the peak level of PTH was at 80.4 pg/mL. Although not surveyed by Ellsworth-Howard test and molecular study, it was classified as pseudohypoparathyroidism type 1a or 1c. The clinical and laboratory abnormalities were corrected by vitamin D in addition to calcium. The patient's mother, sister, and grandmother had AHO phenotypes without clinical and biochemical manifestations. To the best of our knowledge, this is the first case by maternal inheritance that AHO phenotypes appear for three generations of a family in Korea.

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A Case of Pseudohypoparathyroidism with Graves' Disease
Gil Woo Lee, Jae Hoon Kim, Kang Won Lee, Sa Il Kim, Sang Mo Hong, Dong Sun Kim, Woong Hwan Choi, You Hern Ahn, Tae Wha Kim
Endocrinology and Metabolism.2010; 25(3): 221. CrossRef

Prevalence of Thyroid Nodules Detected by Ultrasonography in Adults for Health Check-Ups and Analysis of Fine Needle Aspiration Cytology.: Won Jun Kim, Joo Hyong Kim, Dong Won Park, Chang Beom Lee, Yong Soo Park, Dong Sum Kim, Woong Hwan Choi, Tae Wha Kim, You Hern Ahn; J Korean Endocr Soc. 2008;23(6):413-419. Published online December 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.6.413

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Abstract PDF

BACKGROUND
The purpose of this study was to assess the prevalence of thyroid nodules in healthy adults without a history of thyroid disease and the results of fine needle aspiration cytology (FNAC). METHODS: We retrospectively studied 4,832 adults (2,427 women, 2,405 men) over the age of 20 who had visited our health care center from January, 2005, to March, 2008. Subjects with previous thyroid disease were excluded. All were screened by thyroid ultrasonography and FNAC was performed on large or potentially malignant nodules. RESULTS: Thyroid nodules were present in 686 women (28.3%) and 396 men (16.5%), with a female predominance (odds ratio = 1.47, 95% CI = 1.35~1.60). The prevalence of a thyroid nodule was significantly correlated with age in both women and men (P < 0.001). Multinodularity also increased according to age in both groups. Ninety patients were tested with conventional FNAC and 195 underwent ultrasonography-guided FNAC. The rate of inadequate cytology by ultrasonographic guidance was lower than by freehand methods, and the total rate of malignant cytology per patient was 17.9%. Ultrasonographic characteristics that significantly correlated with histologically-confirmed papillary carcinoma included a solid component, hypoechogenecity, irregular margin, and the presence of microcalcification or macrocalcification. CONCLUSION: The prevalence of thyroid nodules detected by ultrasonography was 28.3% in healthy women and 16.5% in healthy men population. The prevalence and multinodularity was significantly correlated with age in both groups. It's useful to examine thyroid by ultrasonography because of detecting more nodules, providing guidance of FNAC, achieving more adequate sampling and not missing small malignant nodules.

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The Prevalence of Thyroid Nodules and the Morphological Analysis of Malignant Nodules on Ultrasonography
An Hyun, Ji Tae-jeong, Lee Hyo-young, Im In-chul
Journal of Radiological Science and Technology.2019; 42(3): 201. CrossRef
Ultrasonographic Characteristics of the Hyperfunctioning Thyroid Nodule and Predictive Factors for Thyroid Stimulating Hormone Suppression
Won Sang Yoo, Hoon Sung Choi
International Journal of Thyroidology.2019; 12(1): 35. CrossRef
Prevalence and Annual Incidence of Thyroid Disease in Korea from 2006 to 2015: A Nationwide Population-Based Cohort Study
Hyemi Kwon, Jin-hyung Jung, Kyung-Do Han, Yong-Gyu Park, Jung-Hwan Cho, Da Young Lee, Ji Min Han, Se Eun Park, Eun-Jung Rhee, Won-Young Lee
Endocrinology and Metabolism.2018; 33(2): 260. CrossRef
Prevalence of thyroid nodules and their associated clinical parameters: a large-scale, multicenter-based health checkup study
Jae Hoon Moon, Min Kyung Hyun, Ja Youn Lee, Jung Im Shim, Tae Hyuk Kim, Hoon Sung Choi, Hwa Young Ahn, Kyung Won Kim, Do Joon Park, Young Joo Park, Ka Hee Yi
The Korean Journal of Internal Medicine.2018; 33(4): 753. CrossRef
Analysis of Fine Needle Aspiration Results of Thyroid Nodules in Ultrasonography
Jong-Gil Kwak, Jae-Bok Han, Jong-Nam Song, Il-Bong Moon, Nam-Gil Choi
The Journal of the Korea Contents Association.2016; 16(5): 290. CrossRef
Clinical Characteristics and Incidence of Thyroid Nodule in the Male Population for Health Check-up
Yeon Jin Jeon, Young Teag Koh, Seung Jong Oh, Min Young Koo
Korean Journal of Endocrine Surgery.2015; 15(4): 93. CrossRef
Clinical Characteristics and Incidence of Thyroid Nodule in the Male Population for Health Check-up
Yeon Jin Jeon, Young Teag Koh, Seung Jong Oh, Min Young Koo
Korean Journal of Endocrine Surgery.2015; 15(4): 93. CrossRef
Management of Thyroid Nodules and Cancers Arising in the Elderly
Eunyoung Kim, June Young Choi, Kyu Eun Lee
Journal of Korean Thyroid Association.2012; 5(2): 99. CrossRef
Screening of Thyroid Cancer and Management of Thyroid Incidentaloma
Jung Jin Cho
Korean Journal of Family Medicine.2010; 31(2): 87. CrossRef

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