卵巢切除和性类固醇对前素合成的影响
Zhuoma Cairang1, Haruhiko Kanasaki1, Tuvshintugs Tumurbaatar1
1Department of Obstetrics and Gynecology, Shimane University Faculty of Medicine, Izumo, 693-8501, Japan, shimane-u.ac.jp.
International journal of endocrinology
|January 1, 2026
概括
雌性大鼠的卵巢切除 (OVX) 抑制了前乳素 (PRL) 的产生,后乳素由雌激醇 (E2) 恢复. 雌激醇直接增加垂体细胞中的PRL水平,独立于下丘脑因素.
科学领域:
- 内分泌学 在内分泌学.
- 生殖生物学 生殖生物学
- 分子内分泌学分子内分泌学
背景情况:
- 孕产腺素 (PRL) 对于女性生殖功能至关重要.
- 雌性大鼠的卵巢切除 (OVX) 会导致垂体PRL mRNA表达的显著下降.
- 卵巢激素在调节PRL产生的作用需要进一步阐明.
研究的目的:
- 为了研究卵巢切除 (OVX) 和卵巢激素对大鼠的益生菌 (PRL) 表达的影响.
- 确定雌激醇 (E2),孕 (P4) 和二 (DHT) 对PRL产生的直接影响.
- 检查OVX和E2对PRL的下丘脑和脑垂体调节因子的影响.
主要方法:
- 在OVX和卵巢完整的老鼠的前垂体中研究了PRLmRNA表达.
- 向OVX和完整的老鼠注射雌激醇 (E2),孕 (P4) 和二激素 (DHT).
- 利用产生PRL的GH3细胞系来评估对PRL表达的直接荷尔蒙影响.
- 分析了甲状腺激素释放激素 (TRH),氨酸氧酶,TRH受体,多巴胺D2受体和folistatin (Fst) 的基因表达.
主要成果:
- OVX显著抑制了PRLmRNA的表达,这种表达通过E2补充恢复.
- P4和DHT并没有阻止OVX诱导的PRL降低或调节完整的老鼠或细胞系中的PRL表达.
- 在完整的老鼠和GH3细胞中,E2显著增加了PRL表达,独立于下丘脑因素或follistatin.
- 欧维克斯没有改变下丘脑TRH或氨酸氧酶的表达,也没有改变垂体TRH/多巴胺受体的表达.
结论:
- 在OVX之后PRL的减少主要是由于E2耗尽.
- 雌激醇直接刺激 pituitary 乳腺的 PRL 生产.
- 脑下垂体PRL调节因子和follistatin不是E2对PRL影响的主要媒介.
关键词:
在HPG轴上TRHH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH TRH雌二醇是雌二醇的一种药物.进行卵巢切除.益生菌蛋白是一种益生菌素.更多相关视频
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