IRS-2通道整合了女性的生殖和能量平衡
D J Burks1, J Font de Mora, M Schubert
1Howard Hughes Medical Institute, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts 02215, USA.
Nature
|October 3, 2000
概括
胰岛素受体基质-2 (IRS-2) 对女性生育至关重要. 它的缺失导致不孕,肥胖和荷尔蒙失衡,突出了哺乳动物调节生殖和能量的保护途径.
科学领域:
- 生殖内分泌学 生殖内分泌学
- 代谢信号传递 代谢信号传递
- 哺乳动物生理学哺乳动物生理学
背景情况:
- 营养素的可用性显著影响物种的生育能力,从哺乳动物到C. elegans.
- 肥胖和诸如多囊卵巢综合征之类的疾病与不孕症有关.
- 生殖成功需要代谢和生殖信号的整合.
研究的目的:
- 为了研究胰岛素受体基质-2 (IRS-2) 在女性生育能力和能量平衡中的作用.
- 阐明IRS-2缺乏对生殖器官和内分泌功能的影响.
- 探索IRS-2,食欲调节和生殖内分泌学之间的联系.
主要方法:
- 一代的IRS-2淘汰赛小鼠.
- 卵巢形态和卵泡数量的分析.
- 测量血激素水平 (黄蛋白化激素,益乳素,性类固醇,瘦素).
- 评估垂体腺大小和淋巴细胞群.
- 评估食物摄入量和体重.
主要成果:
- 删除IRS-2导致女性不孕,卵巢小,无排卵,卵泡减少.
- 缺乏IRS-2的小鼠表现出低水平的黄素化激素,益生素和性类固醇.
- 在缺少IRS-2的小鼠中,垂体腺体较小,具有较少的淋巴细胞.
- 缺少IRS-2的女性表现出增加的食物摄入量和肥胖,尽管瘦素水平升高.
结论:
- 在哺乳动物中,IRS-2对雌性生育至关重要.
- 胰岛素信号,由素和神经调节,影响下丘脑对食欲和生殖的控制.
- 一个涉及IRS-2的进化保存机制调节了生殖和能量平衡.
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