Summary
The effect of high concentrations of testosterone on ovarian follicle development was investigated. Primary follicles and granulosa cells were cultured in vitro in media supplemented with a testosterone concentration gradient. The combined effects of testosterone and follicle-stimulating hormone (FSH) on follicular growth and granulosa cell gonadotropin receptor mRNA expression were also investigated. Follicle growth in the presence of high testosterone concentrations was promoted at early stages (days 1–7), but inhibited at later stage (days 7–14) of in vitro culture. Interestingly, testosterone-induced follicle development arrest was rescued by treatment with high concentrations of FSH (400 mIU/mL). In addition, in cultured granulosa cells, high testosterone concentrations induced cell proliferation, and increased the mRNA expression level of FSH receptor (FSHR), and luteinized hormone/choriogonadotropin receptor. It was concluded that high concentrations of testosterone inhibited follicle development, most likely through regulation of the FSH signaling pathway, although independently from FSHR downregulation. These findings are an important step in further understanding the pathogenesis of polycystic ovary syndrome.
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This project was supported by grants from the National Basic Research Program of China (973 program) (Nos. 2012CB944700 and 2011CB944502), the National Natural Science Foundation of China (No. 31371453), the Scientific Research Foundation of Shandong Province of Outstanding Young Scientist (No. 2012BSE27089), and 2012 Shandong Province Post-Doctoral Innovation Foundation (Nos. 201102017 and 201203052).
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Liu, T., Cui, Yq., Zhao, H. et al. High levels of testosterone inhibit ovarian follicle development by repressing the FSH signaling pathway. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 35, 723–729 (2015). https://doi.org/10.1007/s11596-015-1497-z
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DOI: https://doi.org/10.1007/s11596-015-1497-z