FOXM1与ERα合作,调节功能β细胞质量
Guihong Peng1, Elham Mosleh2, Andrew Yuhas2
1Department of Medicine, Johns Hopkins University, Baltimore, Maryland, United States.
American journal of physiology. Endocrinology and metabolism
|April 22, 2025
概括
叉头盒 (FOX) M1 增强了雄性小鼠但不是雌性小鼠的β细胞功能. 雌激素受体α (ERα) 与女性β细胞中的FOXM1合作,解释了糖尿病易感性的性别差异.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 代谢疾病 代谢疾病
背景情况:
- 叉头盒 (FOX) M1是一种转录因子,对β细胞增殖和胰岛素分泌至关重要.
- 之前的研究表明,FOXM1激活可增强雄性小鼠中的β细胞功能.
- 然而,FOXM1在雌性小鼠中的作用和潜在的机制仍然不清楚.
研究的目的:
- 为了研究FOXM1对β细胞功能的调节中的性二态.
- 探索FOXM1与β细胞中雌激素信号传递之间的潜在相互作用.
- 阐明导致糖尿病易感性性别差异的分子机制.
主要方法:
- 在雄性和雌性小鼠的β细胞中表达构成性活跃的FOXM1 (FOXM1*).
- 评估β细胞增殖,耐葡萄糖和胰岛素分泌.
- 对β细胞特异性ERα删除模型的分析.
- 染色体免疫沉测序 (ChIP-seq) 用于确定β细胞中的FOXM1和ERα结合位.
主要成果:
- 在雄性小鼠中,FOXM1*表达增加了β细胞功能,增殖和质量,但不是雌性小鼠.
- 福克斯M1*在男性,但不是女性人类小岛上增强了葡萄糖刺激的胰岛素分泌.
- 在雌性小鼠中,FOXM1*表达拯救了具有β细胞特异性ERα缺失的代谢功能障碍.
- 在β细胞中的FOXM1和ERα结合部位之间观察到显著的重叠,特别是在雌激素的存在下.
结论:
- 福克斯M1和雌激素受体α (ERα) 在调节β细胞功能方面具有功能性合作.
- 这种由雌激素介导的相互作用解释了FOXM1对β细胞的影响中的性二态性.
- 这些发现表明女性糖尿病发病率较低的机制,并突出了性别特定的治疗目标.
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