高脂肪饮食改善了CHCHD10突变小鼠中的线粒体心肌病变
Nneka Southwell1,2, Onorina Manzo3, Sandra Bacman4
1Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, 407 East 61st Street, New York, NY, 10065, USA.
EMBO molecular medicine
|May 9, 2024
概括
高脂肪饮食改善了CHCHD10突变导致线粒体心肌病的小鼠的心脏功能和存活率. 这种代谢疗法减少了蛋白质聚合和压力,为治疗类似的人类疾病提供了希望.
科学领域:
- 线粒体生物学 线粒体生物学
- 心血管研究研究心血管研究
- 代谢疾病 代谢疾病
背景情况:
- CHCHD10中的突变与自体主导线粒体疾病有关.
- CHCHD10蛋白聚合和蛋白质毒性线粒体综合应激反应 (mtISR) 在Chchd10敲进小鼠中引起致命的心肌病.
- 突变心脏表现出代谢重新连接,偏好糖解而不是脂肪酸氧化.
研究的目的:
- 为了研究高脂肪饮食 (HFD) 的治疗潜力,在与CHCHD10相关的线粒体心肌病的小鼠模型中抵消代谢重新连接.
- 评估HFD对S55L突变小鼠心脏功能,存活率,蛋白质聚合和分子标记物的影响.
主要方法:
- Chchd10 S55L敲进小鼠接受了长期高脂肪饮食.
- 评估心脏功能,并监测存活率.
- 用基因表达分析分析了代谢变化和心肌病标志物.
- 评估了CHCHD10的聚合水平.
主要成果:
- HFD改善了心室功能障碍,显著延长了生存期,特别是在患有怀孕引起心肌病的雌性小鼠中.
- 基因表达数据证实,HFD后脂肪酸利用率增加和心肌病标志物减少.
- HFD减少了聚合CHCHD10的积累,这表明加强了质量控制机制.
结论:
- 代谢疗法,特别是HFD,可以有效地抵消CHCHD10相关的线粒体心肌病的代谢重新连接.
- HFD通过改善心脏功能,延长存活时间和减少蛋白质毒性压力来证明治疗效益.
- 这些发现凸显了代谢干预作为治疗与蛋白质毒性压力相关的线粒体心肌病的有希望的策略.
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