Endocrinology and Metabolism

Hye Won Chung (Chung HW)

5 Articles

Gly1057Asp Polymorphism of the Insulin Receptor Substrate-2 Genes May Not Have a Significant Impact on Insulin Resistance in Korean Women with Polycystic Ovary Syndrome.: Ji Young Oh, Jee Young Oh, Yeon Ah Sung, Hye Jin Lee, Hye Won Chung; J Korean Endocr Soc. 2009;24(2):100-108. Published online June 1, 2009; DOI: https://doi.org/10.3803/jkes.2009.24.2.100

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BACKGROUND
Insulin resistance is a key factor in the pathogenesis of polycystic ovary syndrome (PCOS), and several candidate genes involved in insulin action such as insulin receptor or insulin recpetor substrate (IRS) have been investigated. In this study, we examined the genetic effects of the IRS-1 and IRS-2 genes on the metabolic and reproductive features in women with PCOS. METHODS: 125 patients with PCOS and 344 regular cycling controls were enrolled. Analysis of the polymorphisms of Gly972Arg in the IRS-1 gene and Gly1057Asp in the IRS-2 gene was performed and oral glucose tolerance tests and hyperinsulinemic euglycemic clamp tests were done. RESULTS: The genotype frequencies of the Gly972Arg polymorphism in the IRS-1 gene and the Gly1057Asp polymorphism in the IRS-2 gene were not significantly different between the women with PCOS and the controls. Gly972Arg polymorphism of the IRS-1 gene was extremely rare in both groups. PCOS women with the IRS-2 Asp1057Asp genotype showed significantly higher hirsutism scores, higher levels of free testosterone and higher post-load 60, 90, and 120 min plasma glucose levels compared to those women with the Gly1057Gly or Gly1057Asp genotype. In contrast, the control women with the Asp1057Asp genotype showed significantly lower post-load 60, 90, and 120 min plasma glucose levels compared with those women with the Gly1057Gly or Gly1057Asp genotype. CONCLUSION: Gly972Arg polymorphism of the IRS-1 gene was extremely rare in Korean women. Gly1057Asp polymorphism of the IRS-2 gene was associated with the phenotypic features of PCOS such as hirsutism, hyperandrogenemia and hyperglycemia, but it was not associated with the insulin sensitivity index. In conclusion, Gly1057Asp polymorphism of the IRS-2 gene may not have a significant impact on insulin resistance in Korean women with PCOS.

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Insulin Receptor Substrate 1 Gly972Arg (rs1801278) Polymorphism Is Associated with Obesity and Insulin Resistance in Kashmiri Women with Polycystic Ovary Syndrome
Shayaq Ul Abeer Rasool, Mudasar Nabi, Sairish Ashraf, Shajrul Amin
Genes.2022; 13(8): 1463. CrossRef

Calpain-10 Polymorphism in Korean Women with Polycystic Ovary Syndrome.: Hye jin Lee, Gun Woo Pyun, Eun Kyung Byun, Ji Young Oh, Jee Young Oh, Youngsun Hong, Yeon Ah Sung, Hye Won Chung; J Korean Endocr Soc. 2008;23(5):319-326. Published online October 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.5.319

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Abstract PDF

BACKGROUND
Polycystic ovary syndrome (PCOS) is characterized by chronic anovulation, hyperandrogenism and insulin resistance, and PCOS is known to be associated with an increased risk of type 2 diabetes mellitus (DM). PCOS has also been proposed to share a common genetic background with type 2 DM. The calpain 10 (CAPN10) gene is known to be associated with type 2 DM in several different population. We examined the association of CAPN10 gene polymorphisms and their influence on the metabolic abnormalities in Korean women who suffer with PCOS. METHODS: One hundred sixty four women with PCOS and 325 control women were studied. The CAPN10 gene polymorphisms were genotyped by amplifying the genomic DNA. Anthropometric measures, a 75g oral glucose tolerance test and measurement of insulin sensitivity by the euglycemic hyperinsulinemic clamp technique were performed. RESULTS: The frequencies of CAPN10 UCSNP-43, UCSNP-19, UCSNP-63 and the haplotype combinations were not different between the women with PCOS and the control subjects. In the women with PCOS and who had the UCSNP-43 GA genotype, the post-load 90 minute plasma glucose level was significantly greater and the HDL cholesterol and insulin mediated glucose uptake were significantly lower compared to the women with PCOS and who had the GG genotype. CONCLUSION: The CAPN10 UCSNP-43 genotype might be responsible for insulin resistance, yet further study is required to confirm the role of this genetic polymorphism in the development of PCOS and the presentation of its disease features.

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Comments on the latest meta-analysis of CAPN10 polymorphism associations with polycystic ovary syndrome
Sidra Raihan, Dawood Shariff, Sami Bizzari
Gene.2019; 717: 144006. CrossRef

Phenotypic Variation of Polycystic Ovary Syndrome.: Gun Woo Pyun, Young Ju Choi, Hyejin Lee, Jee Young Oh, Young Sun Hong, Yeon Ah Sung, Hye Won Chung; J Korean Endocr Soc. 2007;22(5):326-331. Published online October 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.5.326

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BACKGROUND
Polycystic ovary syndrome (PCOS) is a common disorder in premenopausal women, but there has been little agreement on its diagnostic criteria due to its uncertain pathogenesis and the heterogeneity of symptoms. This study was performed in order to assess the differences in clinical, metabolic, and hormonal characteristics of women in the PCOS subgroups defined by ESHRE criteria. METHODS: Subjects were divided into four PCOS subgroups based on ESHRE criteria. The grouping groupings included: 1) hyperandrogenism, oligomenorrhea, and polycystic ovary morphology (HA + OM + PCO); 2) hyperandrogenism and oligomenorrhea (HA + OM); 3) hyperandrogenism and polycystic ovary morphology (HA + PCO); and 4) oligomenorrhea and polycystic ovary morphology (OM + PCO). Reproductive hormones and metabolic profiles were measured. RESULTS: Of the total number of subjects, 60 (40%) fulfilled the criteria for HA + OM + PCO, 50 (33%) for HA + OM, 11 (7%) for HA + PCO, and 30 (20%) for OM + PCO. There were no significant differences in clinical or metabolic features among the groups, except for LH, total cholesterol, and HDL cholesterol. CONCLUSION: In this population defined by ESHRE criteria, 73% of the patients met the former NIH definition for PCOS. Different phenotypes of PCOS cases were clinically or biochemically similar. Whether these women have an increased risk of infertility or metabolic complications remains to be determine.

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Epidemiology and Diagnostic Criteria of Polycystic Ovary Syndrome
Hyejin Lee, Yeon-Ah Sung
The Journal of Korean Diabetes.2015; 16(3): 189. CrossRef
Hyperandrogenism in Women: Polycystic Ovary Syndrome
Yeon-Ah Sung
Hanyang Medical Reviews.2012; 32(4): 197. CrossRef
Polycystic Ovary Syndrome in Korean Women: Clinical Characteristics and Diagnostic Criteria
Yeon-Ah Sung
Endocrinology and Metabolism.2011; 26(3): 203. CrossRef
Clinical Manifestation of Polycysticv Ovary Syndrome
Yu-Bae Ahn
Journal of Korean Endocrine Society.2007; 22(5): 323. CrossRef

Therapeutic Effects of Metformin and Rosiglitazone in Korean Women with Polycystic Ovary Syndrome.: Jee Young Oh, Eun Kyung Byun, Hwi Ra Park, Young Ju Choi, Hyo Jung Kim, Hye Jin Lee, Young Sun Hong, Yeon Ah Sung, Hye Won Chung; J Korean Endocr Soc. 2005;20(5):467-475. Published online October 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.5.467

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BACKGROUND
Insulin resistance is a central feature of polycystic ovary syndrome (PCOS), and hyperinsulinemia contributes to anovulation, oligo or amenorrhea, hyperandrogenism and infertility in women with PCOS. The use of insulin sensitizers, such as metformin or thiazolidinedione, in PCOS is becoming increasingly accepted. The purpose of our study was to evaluate the therapeutic effects of metformin and rosiglitazone on the metabolic and reproductive derangement, and find parameters predicting their therapeutic efficacy in Korean PCOS women. METHODS: Sixty-two women with PCOS were recruited. The baseline characteristics, including BMI, glucose tolerance test, lipid profiles, sex hormones and hyperinsulinemic euglycemic clamp test, were assessed. After the administration of the insulin sensitizer (metformin 1.5g/day or rosiglitazone 4mg/day) for 3 months, the insulin sensitivity was reassessed. A drug response was defined as menstrual restoration or pregnancy. RESULTS: Of the 62 women with PCOS, 36 gained restored regular menstruation, and a further 5 conceived (a drug response rate of 66.7%). There were no significant clinical differences between responders and nonresponders. Twelve weeks after taking the drugs, the insulin sensitivity was significantly improved (M-value 4.7+/-0.2 vs. 5.5+/-0.4mg/kg/min, P<0.05), and the free testosterone levels(72.5+/-39.9 vs. 45.8 +/-3.8pmol/L, P<0.05) were significantly decreased, without significant weight reduction. CONCLUSION: Metformin and rosiglitazone restored menstruation in 66.1% of women with PCOS. Hyperandrogenemia and insulin sensitivity were significantly improved with the use of the two drugs. However, metabolic or hormonal markers for predicting the drug response could not be found.

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Diagnosis and Treatment of Polycystic Ovary Syndrome
Hyejin Lee, Yeon-ah Sung
Journal of Korean Endocrine Society.2007; 22(4): 252. CrossRef

Two Cases of Malignant Lymphoma Involving Bilateral Adrenal Glands as Huge Masses.: Seung Hyeok Han, Jin Seok Kim, Myung Soo Kim, Hye Won Chung, Jae Ho Jung, Young Suck Goo, Chul Woo Ahn, Jae Hyun Nam, Sang Soo Jung, Young Duk Song, Sung Kil Lim, Kyung Rae Kim, Hyun Chul Lee, Kap Bum Huh, Jee Sook Hahn; J Korean Endocr Soc. 2000;15(1):121-127. Published online January 1, 2001

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Abstract PDF: Adrenal gland is a common site of metastatic tumors such as breast cancer, lung cancer, and colon cancer. When adrenal mass is found incidentally, adenoma is the most common among single adrenal masses. But in the case of bilateral adrenal masses, infection, bilateral metastases and hemorrhage are common. Secondary involvement of the adrenal gland is found in 25% of autopsy cases of non-Hodgkin's lymphoma. However, adrenal insufficiency is rare because it becomes apparent only when approximately 90% of adrenal cortex is destructed. We exprienced two cases of malignant lymphoma which involved the adrenal glands bilaterally. One case in which adrenal insufficiency was suspicious, was accompanied by hypovolemic shock and sepsis at the initial presentation. He died of sepsis combined with DIC even though hydrocortisone, intravenous saline infusion, and antibiotics therapy were started immediately. The other one was found incidentally, in which adrenal infiltraion was confirmed by CT scan. Hormonal level was normal and adrenal masses disappeared after chemotherapy.

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