在小鼠中,ACSS2调解了一条表观遗传途径,以调节妊娠期间的β细胞适应
Yu Zhang1,2,3, Shuang He2,4, Xi Wang2,3
1State Key Laboratory of Female Fertility Promotion, Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, 100191, China.
Nature communications
|May 20, 2025
概括
孕产妇的胰腺β细胞通过涉及乙-A合成酶2 (ACSS2) 的表观遗传变化适应怀孕. 干扰,特别是高脂肪饮食,损害功能,但ACSS2删除可以恢复它,提供了关于妊娠糖尿病的见解.
科学领域:
- 生殖生物学 生殖生物学
- 代谢内分泌学代谢内分泌学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 孕产妇的胰腺β细胞适应了怀孕的需求,但不适应导致妊娠糖尿病.
- 怀孕期间β细胞适应的机制尚不清楚.
- 孕期糖尿病 (GDM) 对母亲和胎儿的健康构成风险.
研究的目的:
- 阐明怀孕期间β细胞适应的单细胞机制.
- 确定参与β细胞可塑性的关键分子参与者和表观遗传途径.
- 探索乙-A合成酶2 (ACSS2) 在怀孕引起的代谢压力中的作用.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 的小鼠胰腺β细胞.
- 基因分析,包括β细胞特异性基因删除.
- 染色体免疫沉 (ChIP) 测试用于评估基因素乙化.
- 高脂肪饮食 (HFD) 和标准饮食 (SD) 的养研究.
主要成果:
- 确定了一种精确的β细胞适应过程,涉及代谢压力,增加乙-CoA生物合成和基因素乙化.
- STAT3和ACSS2促进了与怀孕相关的基因的基因素乙化.
- HFD诱导染色质过乙化,导致β细胞功能障碍,通过Acss2删除来挽救.
- 在HFD养的小鼠中,ACSS2对于早期适应至关重要,但不是SD养的小鼠.
结论:
- 在怀孕期间发现了详细的,单细胞调节的β细胞适应过程.
- 确定了一种特定的表观遗传通路 (STAT3/p300/ACSS2),该通路控制着β细胞的可塑性.
- 这些发现提供了对GDM病原体和β细胞功能障碍的潜在治疗点的见解.
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