Endocrinology and Metabolism

Yoon Hee Cho (Cho YH)

3 Articles

Endocrine Research
Danshen Extracts Prevents Obesity and Activates Mitochondrial Function in Brown Adipose Tissue: Yoon Hee Cho, Cheol Ryong Ku, Young-Suk Choi, Hyeon Jeong Lee, Eun Jig Lee; Endocrinol Metab. 2021;36(1):185-195. Published online February 24, 2021; DOI: https://doi.org/10.3803/EnM.2020.835

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Background
Danshen has been widely used in oriental medicine to improve body function. The purpose of this study is to investigate the effect of water-soluble Danshen extract (DE) on weight loss and on activation proteins involved in mitochondrial biogenesis in brown adipose tissue (BAT) in obese mice.
Methods
BAT was isolated from 7-week-old male Sprague-Dawley rats, and expression of proteins related to mitochondrial biogenesis was confirmed in both brown preadipocytes and mature brown adipocytes treated with DE. For the in vivo study, low-density lipoprotein receptor knock out mice were divided into three groups and treated for 17 weeks with: standard diet; high fat diet (HFD); HFD+DE. Body weight was measured every week, and oral glucose tolerance test was performed after DE treatment in streptozotocin-induced diabetic mice. To observe the changes in markers related to thermogenesis and adipogenesis in the BAT, white adipose tissue (WAT) and liver of experimental animals, tissues were removed and immediately frozen in liquid nitrogen.
Results
DE increased the expression of uncoupling protein 1 and peroxisome proliferator-activated receptor gamma coactivator 1-alpha in brown preadipocytes, and also promoted the brown adipocyte differentiation and mitochondrial function in the mature brown adipocytes. Reactive oxygen species production in brown preadipocytes was increased depending on the concentration of DE. DE activates thermogenesis in BAT and normalizes increased body weight and adipogenesis in the liver due to HFD. Browning of WAT was increased in WAT of DE treatment group.
Conclusion
DE protects against obesity and activates mitochondrial function in BAT.

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Pharmacological Benefits and Underlying Mechanisms of Salvia miltiorrhiza against Molecular Pathology of Various Liver Diseases: A Review
Cho Hyun Hwang, Eungyeong Jang, Jang-Hoon Lee
The American Journal of Chinese Medicine.2023; 51(07): 1675. CrossRef

Endocrine Research
The Effects of High Fat Diet and Resveratrol on Mitochondrial Activity of Brown Adipocytes: Cheol Ryong Ku, Yoon Hee Cho, Zhen-Yu Hong, Ha Lee, Sue Ji Lee, Seung-soo Hong, Eun Jig Lee; Endocrinol Metab. 2016;31(2):328-335. Published online April 8, 2016; DOI: https://doi.org/10.3803/EnM.2016.31.2.328

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Abstract PDF PubReader

Background

Resveratrol (RSV) is a polyphenolic phytoalexin that has many effects on metabolic diseases such as diabetes and obesity. Given the importance of brown adipose tissue (BAT) for energy expenditure, we investigated the effects of RSV on brown adipocytes.

Methods

For the in vitro study, interscapular BAT was isolated from 7-week-old male Sprague Dawley rats. For the in vivo study, 7-week-old male Otsuka Long Evans Tokushima Fatty (OLETF) rats were divided into four groups and treated for 27 weeks with: standard diet (SD); SD+RSV (10 mg/kg body weight, daily); high fat diet (HFD); HFD+RSV. RSV was provided via oral gavage once daily during the in vivo experiments.

Results

RSV treatment of primary cultured brown preadipocytes promoted mitochondrial activity, along with over-expression of estrogen receptor α (ER-α). In OLETF rats, both HFD and RSV treatment increased the weight of BAT and the differentiation of BAT. However, only RSV increased the mitochondrial activity and ER-α expression of BAT in the HFD-fed group. Finally, RSV improved the insulin sensitivity of OLETF rats by increasing the mitochondrial activity of BAT, despite having no effects on white adipocytes and muscles in either diet group.

Conclusion

RSV could improve insulin resistance, which might be associated with mitochondrial activity of brown adipocyte. Further studies evaluating the activity of RSV for both the differentiation and mitochondrial activity of BAT could be helpful in investigating the effects of RSV on metabolic parameters.

Citations

Citations to this article as recorded by

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Response: The Effects of High Fat Diet and Resveratrol on Mitochondrial Activity of Brown Adipocytes (Endocrinol Metab2016;31:328-35, Cheol Ryong Ku et al.)
Cheol Ryong Ku, Eun Jig Lee
Endocrinology and Metabolism.2016; 31(3): 482. CrossRef
Letter: The Effects of High Fat Diet and Resveratrol on Mitochondrial Activity of Brown Adipocytes (Endocrinol Metab2016;31:328-35, Cheol Ryong Ku et al.)
Ji-Young Cha
Endocrinology and Metabolism.2016; 31(3): 480. CrossRef

Development of a Long-Acting Follicle-Stimulating Hormone Using Serum Albumin Fab-Associated Technology for Female Infertility: Daham Kim, Yoon Hee Cho, Min Jeong Kang, So Jeong Lee, Soohyun Lee, Bo Hyon Yun, Hyunjin Chi, Jeongsuk An, Kyungsun Lee, Jaekyu Han, Susan Chi, Moo Young Song, Sang-Hoon Cha, Eun Jig Lee; Received July 4, 2024 Accepted September 11, 2024 Published online December 4, 2024; DOI: https://doi.org/10.3803/EnM.2024.2090 [Epub ahead of print]

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Abstract PDF: Background
Recombinant human follicle-stimulating hormone (rhFSH) is commonly used to treat female infertility, but its short half-life necessitates multiple doses. Even corifollitropin alfa, with an extended half-life, requires supplementary injections of rhFSH after 7 days. This study aimed to develop and evaluate a long-acting follicle-stimulating hormone (FSH) formulation using anti-serum albumin Fab-associated (SAFA) technology to avoid additional injections and enhance ovarian function.
Methods
SAFA-FSH was synthesized using a Chinese hamster ovary expression system. Its biological efficacy was confirmed through assays measuring its ability to stimulate cyclic adenosine monophosphate (cAMP) production, estradiol synthesis, and the expression of human cytochrome P450 family 19 subfamily A member 1 (hCYP19α1) and human steroidogenic acute regulatory protein (hSTAR) in human ovarian granulosa (KGN) cells. To evaluate the effects of SAFA-FSH, we compared its impact on serum estradiol levels and ovarian weight increase with that of rhFSH in Sprague-Dawley (SD) rats using the modified Steelman-Pohley test.
Results
The results indicated that SAFA-FSH induces cAMP synthesis in KGN cells and upregulates the expression of hCYP19α1 and hSTAR in a dose-dependent manner. Female SD rats, aged 21 days, receiving daily subcutaneous human chorionic gonadotropin injections for 5 days exhibited a significant increase in serum estradiol levels and ovarian weight when administered SAFA-FSH on the first day or when given nine injections of rhFSH over 5 days. Notably, the group receiving SAFA-FSH on the first and third days demonstrated an even greater rise in serum estradiol levels and ovarian weight.
Conclusion
These findings suggest that SAFA-FSH presents a promising alternative to current rhFSH treatments for female infertility. However, further research is essential to thoroughly assess its safety and efficacy in clinical contexts.

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