Endocrinology and Metabolism

Yoon Soo Rhee (Rhee YS)

3 Articles

CAG Repeats in the Androgen Receptor Polymorphism do not Correlate with Thyrotoxic Periodic Paralysis.: Won Gu Kim, Tae Yong Kim, Jung Min Kim, Yoon Soo Rhee, Hyun Jeung Choi, Won Bae Kim, Young Kee Shong; J Korean Endocr Soc. 2008;23(2):117-122. Published online April 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.2.117

1,759 View
21 Download
3 Crossref

BACKGROUND
Thyrotoxic periodic paralysis (TPP) occurs mostly in males, but no studies have addressed the role of androgen in the disease. Hyperinsulinemia can precipitate acute paralysis in TPP patients. CAG repeats in the androgen receptor (AR), an X-linked gene, correlate with serum insulin levels. AIM: To evaluate whether CAG repeats in the AR gene might predict the susceptibility to TPP in Korean male Graves' patients. METHODS: We evaluated CAG repeat length in a series of 33 male TPP patients and 48 control patients by direct sequencing of the PCR product of the AR promoter site. Control patients were male Graves' patients without a history of paralysis. RESULTS: The CAG repeat length varied from 15 to 34 (median of 23). The upper quartile of CAG length was equal to or above 26 repeats (long AR). The distribution of long AR was 0.30 in TPP and 0.15 in control patients, respectively (odds ratio, 2.51; 95% confidence interval, 0.92~6.85; P = 0.09). CONCLUSION: AR gene polymorphisms may not confer genetic susceptibility to TPP in Korean male patients with Graves' disease.

Citations

Citations to this article as recorded by

Contributions of CAG repeat length in the androgen receptor gene and androgen profiles to premature pubarche in Korean girls
Min Jae Kang, Jeong Seon Lee, Hwa Young Kim, Hae Woon Jung, Young Ah Lee, Sun Hee Lee, Ji-Young Seo, Jae Hyun Kim, Hye Rim Chung, Se Young Kim, Choong Ho Shin, Sei Won Yang
Endocrine Journal.2017; 64(1): 91. CrossRef
Thyrotoxic Periodic Paralysis and Polymorphisms of the ADRB2, AR, and GABRA3 Genes in Men with Graves Disease
Suyeon Park, Tae Yong Kim, Soyoung Sim, Seonhee Lim, Mijin Kim, Hyemi Kwon, Min Ji Jeon, Won Gu Kim, Young Kee Shong, Won Bae Kim
Endocrinology and Metabolism.2016; 31(1): 142. 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 Wnt-1 on the Growth and Apoptosis of FRTL-5 Cells.: Jung Min Kim, Tae Yong Kim, Young Kee Shong, Yoon Soo Rhee, Eun Jung Park, Hyun Chung Choi, Won Bae Kim; J Korean Endocr Soc. 2007;22(1):35-44. Published online February 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.1.35

1,869 View
18 Download

Abstract PDF: BACKGROUND
Wnt proteins are major signaling molecules involved in embryonic induction, generation of cell polarity and the cell fate decision. A central player in the Wnt signaling pathways is beta-catenin. Several studies have suggested that the Wnt/beta-catenin signaling pathway may be involved in the physiologic/pathologic control of thyroid cell growth and function. METHODS: We investigated the effect of thyroid-stimulating hormone (TSH) on the expression of Wnt proteins in FRTL-5 cells. To evaluate the effect of Wnt-1 on FRTL-5 cells growth, we isolated a stable cell line that overexpressed Wnt-1 (W1), and a vector-transfected cell clone (V3) was used as a control. We investigated the differences in the cellular growth rate, the cell cycle and cell apoptosis in the W1 and V3 cell lines. RESULTS: TSH caused a significant increase in the Wnt-1 level and a pronounced decrease in both the active and total beta-catenin levels in the FRTL-5 cells. The growth rate, the percentage of cells in the S/G2/M phase and the c-myc level were significantly higher in the W1 cells compared with the V3 cells. There was no change in the beta-catenin level and the cyclin D1 level in the W1 cells compared with the V3 cells. The cellular apoptosis induced by actinomycin-D seemed to be significantly decreased because the level of bcl-2 was increased in the W1 cells compared with the V3 cells. CONCLUSION: The FRTL-5 cells expressed Wnt-1 protein, and TSH increased the Wnt-1 expression, and it paradoxically decreased beta-catenin in the FRTL-5 cells. Overexpression of Wnt-1 in the FRTL-5 cells increased cell growth and it decreased apoptosis. Growth stimulation by Wnt-1 overexpression was not mediated by beta-catenin (the canonical Wnt pathway), but seemed to be mediated by activation of the Wnt/Ca2+ pathway, which involves an increased c-myc level. Suppression of apoptosis with Wnt-1 overexpression was due to the increased bcl-2 level.

Role of 5-aminoimidazole-4-carboxamide-1-beta-D-ribofuranoside in the Growth Regulation of Anaplastic Thyroid Cancer Cells Lines.: Ja Young Song, Tae Yong Kim, Won Bae Kim, Young Kee Shong, Yoon Soo Rhee, Ji Hye Suck, Suck Joon Hong; J Korean Endocr Soc. 2006;21(2):125-131. Published online April 1, 2006; DOI: https://doi.org/10.3803/jkes.2008.21.2.125

1,433 View
18 Download

Abstract PDF: BACKGROUND
Anaplastic thyroid carcinoma is one of the most aggressive human cancers with a median survival of only 6 months. Local surgical tumor debulking combined with radio-chemotherapy is generally used to treat this malady, but the low success rate has prompted the search for new therapeutic targets. We used 5-aminoimidazole-4-carboxamide-1-beta-D-ribofuranoside (AICAR) as an AMP-activated protein kinase (AMPK) activator to induce growth suppression and apoptosis in the anaplastic thyroid carcinoma cells. METHODS: We investigated the effect of AICAR on the proliferation of thyroid cancer cell lines (ARO, WRO and FRO) by performing methyl-thiazoletetrazolium bromide assay. We wanted to see the effect of AICAR on the apoptosis and cell cycle of the thyroid cancer cells, and we wanted to determine the mechanism of these changes. RESULTS: The proliferation of all thyroid cancer cell lines was significantly inhibited by administration of AICAR. FRO was the most susceptible cell line to AICAR treatment and so further studies were then performed with this cell line. The suppressive effect of AICAR on cell proliferation was related with phosphorylation of AMPK and the increased apoptosis. Also, cell cycle analysis revealed that progression to the G2-M phase was arrested (S-phase arrest) by AICAR treatment. S-phase arrest was associated with the increased protein expression of p21. CONCLUSION: In the anaplastic thyroid cancer cell lines, AICAR inhibited proliferation due to the arrest in the S-phase; this was accompanied with the increased expression of p21. Overall, AMPK activation by AICAR or any other pharmacological agent could be a tempting potential target for thyroid cancer therapy.

Author index