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- W2123228720 abstract "Leptin, the 'obese' protein, is found in cultured granulosa cells derived from human pre-ovulatory follicles. However, the occurrence of leptin has not been studied in intact ovaries, either normal or polycystic, until now. Paraffin sections from 25 human ovaries of different cycle stages and 25 wedge resections of polycystic ovaries were investigated by means of immunochemistry. Additionally, three ovaries were available for reverse transcription-polymerase chain reaction analysis. Leptin-positive cells were located in the granulosa cells of pre-antral follicles, and distinctly in the thecal layer of intact and regressing antral follicles. In the corpus luteum (CL) in the developmental stage, the former epithelioid leptin-positive thecal cells became fibroblast-like in the septum. In the CL of the secretory stage, single leptin-positive cells were detected between luteal cells. In polycystic ovaries, leptin-positive cells were noted both in the hypertrophied thecal layer and in the luteinized granulosa layer. Our findings on leptin expression at the protein level were confirmed by a positive mRNA signal for leptin in granulosa cells and in the CL. Additionally, mRNA of the full-length leptin receptor OB-R and of the short isoforms B219.1-B219.3 was identified in granulosa cells and the CL, as well as in the cortex and medulla. We conclude that leptin is produced in the ovary and may act in autocrine and paracrine ways." @default.
- W2123228720 created "2016-06-24" @default.
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- W2123228720 date "2001-12-01" @default.
- W2123228720 modified "2023-09-25" @default.
- W2123228720 title "Evidence of leptin expression in normal and polycystic human ovaries" @default.
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- W2123228720 doi "https://doi.org/10.1093/molehr/7.12.1143" @default.
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