GHSR1a对手LEAP2以性别特定的方式调节小岛激素的释放
Nirun Hewawasam1, Debalina Sarkar1, Olivia Bolton1
1School of Life and Health Sciences, University of Roehampton, London, UK.
The Journal of endocrinology
|September 18, 2024
概括
肝脏表达的抗微生物2 (LEAP2) 和乙格林 (AG) 不同调节胰腺小岛激素. LEAP2增强了男性小岛的胰岛素分泌,而这两种激素对雌激素调节的体静止素释放有性别特异性的影响.
科学领域:
- 内分泌学 在内分泌学.
- 代谢过程中的代谢.
- 分子生物学分子生物学
背景情况:
- 格林林受体 (GHSR1a) 抗剂,如LEAP2,影响食欲和能量平衡.
- 对于LEAP2和ghrelin在调节胰腺小岛激素中的作用,这对葡萄糖平衡至关重要,仍然不太了解.
- 已知胰腺小岛激素分泌表现出性别特异性差异.
研究的目的:
- 研究乙格林 (AG) 和LEAP2对胰腺小岛激素释放的性别特异性影响.
- 探索17-β雌二醇 (E2) 对AG和LEAP2介导的小岛激素调节的影响.
- 阐明GHSR1a信号传递在小岛功能和葡萄糖代谢中的作用.
主要方法:
- 从雄性和雌性小鼠中分离出来的小岛被用于激素分泌实验.
- 激素水平使用放射性免疫试验量化.
- 相关基因的mRNA表达 (Ghsr1a,Ghrelin,Leap2,Mrap2,Mboat4,Sstr3) 通过qPCR进行了分析.
主要成果:
- LEAP2在雄性小岛上显著增强了胰岛素分泌,但在雌性小岛上没有.
- LEAP2在雄性小岛上逆转了AG刺激的体静止素释放,但在雌性小岛上没有观察到这种效应.
- 17β雌二醇 (E2) 调节了AG和LEAP2对雄性小岛的胰岛素和体静止素释放的影响.
结论:
- AG和LEAP2对胰腺小岛的胰岛素和体静止素释放产生相反的,取决于性别的影响.
- 雌激醇在调节男性的这些荷尔蒙反应方面发挥着重要作用.
- 通过GHSR1a信号来调节体静止素的释放是了解岛屿功能和葡萄糖代谢的关键因素.
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