周产期缺铁会改变新生儿后代的心脏蛋白质组和线粒体功能
Claudia D Holody1,2, Andrew G Woodman3, Chunpeng Nie1,2
1Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada.
American journal of physiology. Heart and circulatory physiology
|November 21, 2024
概括
周产期缺铁 (ID) 损害了新生小鼠的心脏线粒体功能,特别是在雄性小鼠中. 能量代谢的这些变化可能会影响心血管健康,强调需要针对性别的干预措施.
科学领域:
- 心血管生理学心血管生理学
- 营养生物化学 营养生物化学
- 发展生物学 发展生物学
背景情况:
- 缺铁 (ID) 是一个普遍的全球营养问题,影响孕妇和婴儿.
- 怀孕和婴儿早期的ID可能会对心血管发育和长期健康产生负面影响.
- 虽然围产期ID导致新生儿心脏功能障碍,但潜在的机制仍然不清楚.
研究的目的:
- 为了研究围产期铁缺乏对新生小鼠心脏线粒体功能的影响.
- 鉴于性别差异,对ID诱导的心脏变化的分子机制进行表征.
- 评估ID对心脏发育过程中的氧化应激和能量代谢的影响.
主要方法:
- 雌性大鼠在怀孕期间被食铁含量有限或铁补充饮食.
- 后代的心脏被分析使用定量猎枪蛋白质组学和高分辨率呼吸计.
- 测量了氧化应激标志物和抗氧化剂基因表达.
- 研究是在出生后的0,14,28天进行的.
主要成果:
- 缺铁的幼体重减轻,心脏体重相对增加.
- 蛋白质组分析揭示了线粒体蛋白质的显著失调,特别是在男性中.
- 男性ID心脏显示线粒体含量增加,但通过NADH,糖酸盐和FAO通路的呼吸减少.
- 贫血症在28日后消失,但线粒体缺陷仍然存在.
结论:
- 在新生小鼠中,周产期缺铁会改变心脏线粒体蛋白质表达和功能.
- 这些线粒体变化可能代表过渡到子宫外生命期间的不适应性补偿.
- 应对围产期ID的性别特异性需要进一步调查,并可能影响治疗策略.
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