孕产妇肥胖症计划通过表观遗传,代谢和免疫失调来对后代进行心脏重塑
bioRxiv : the preprint server for biology
|June 12, 2025
概括
通过高脂肪饮食 (HFD) 的孕产妇肥胖会让后代患上心血管疾病. 后代心脏的早期表观遗传变化与晚年代谢和心脏功能障碍有关,提供了干预目标.
科学领域:
- 发展生物学 发展生物学
- 心血管科学 心血管科学
- 代谢健康 代谢健康
背景情况:
- 孕产妇的肥胖是后代心血管疾病的重要危险因素.
- 高脂肪饮食 (HFD) 诱导的母婴肥胖症在小鼠模型人类代谢异常.
研究的目的:
- 为了研究暴露于母体HFD的后代的心脏代谢干扰.
- 确定早期发育变化,包括表观遗传修饰,将母亲肥胖与后代心血管疾病联系起来.
主要方法:
- 利用小鼠模型对母体HFD诱导的肥胖症进行研究.
- 对肥胖,高血压,失脂症和代谢不灵活性的后代进行了评估.
- 进行了详细的心脏功能,代谢和免疫分析.
- 在生命早期的后代中分析了心脏DNA甲基化.
主要成果:
- 被高血压养母亲 (非高血压养) 的后代表现出肥胖,高血压,血脂不良和代谢不灵活.
- 没有HFD的小鼠表现出心脏缩,排泄率降低,纤维化和线粒体功能障碍.
- 免疫变化包括巨细胞增加和T细胞亚种群减少在非HFD心脏中.
- 在Off-HFD后代中观察到早期的心脏DNA甲基化变化.
结论:
- 母亲的HFD重新编程后代,导致渐进的心脏代谢功能障碍和免疫系统的改变.
- 后代心脏的早期表观遗传重塑与晚年心血管失调有关.
- 研究结果表明,早期治疗干预可能有助于减轻与孕产妇肥胖相关的风险.
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