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MTSS1下调对扩展性心肌病的性别特异性影响
Dongwook Choe1,2, Megan Burke1,2, Jeffrey A Brandimarto1,2
1Division of Cardiovascular Medicine, University of Pennsylvania Perelman School of Medline, Philadelphia, PA, USA.
medRxiv : the preprint server for health sciences
|March 11, 2024
概括
在MTSS1 (转移抑制剂1) 的遗传变异保护免受扩张性心肌病,与性别的影响不同. 较低的MTSS1表达在雌性小鼠中部分挽救了心脏功能,并且与女性的心脏特征有关.
科学领域:
- 心血管遗传学 心血管遗传学
- 分子心脏病学分子心脏病学
- 系统生物学 系统生物学
背景情况:
- MTSS1 (转移抑制剂1) 是一个I-BAR蛋白调节细胞骨动力学.
- 在MTSS1上游的心脏增强剂中的遗传变异减少了其表达,并防止扩张性心肌病 (DCM).
- MTSS1变异对心脏特征的性别特异性影响需要进一步研究.
研究的目的:
- 通过人口基因组学和小鼠模型研究MTSS1变异对心脏功能和重塑的功能影响.
- 探索MTSS1对心脏特征影响的潜在性别特异性差异.
主要方法:
- 交叉MTSs1哈普洛因不足小鼠与DCM的转基因小鼠模型.
- 分析了22381名英国生物库参与者的心脏磁共振 (CMR) 特征.
- 精确地绘制了MTSS1位点,并检查了与CMR特征的关联,按生物性别分层.
- 与基因型-组织表达 (GTEx) 项目的MTSS1表达数据进行局部化发现.
主要成果:
- 与对照组相比,雌性转基因/Mtss1+/-小鼠显示DCM的部分救援,LV射出分数增加和LV体积减少.
- 在雄性小鼠中没有观察到显著差异.
- 在人类中,MTSS1增强剂变体显示出与CMR特征的性别特异关联,主要在女性中.
- 在男性中,关联显著较弱,支持性别二态化.
结论:
- MTSS1的哈普洛缺陷提供了对DCM的部分保护,特别是在女性身上.
- 影响MTSS1表达的基因变异对心脏重塑表现出性别特异性的影响.
- 这些发现突显了心脏特征和疾病中性别二态化的遗传基础.
- 激励性别特定的方法来研究心脏病的常见变体.
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