瘦肉MAFLD中的端粒长度和死亡率:代谢适应的另一面

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Mohammad Alarabi¹, Ziyan Pan¹, Manuel Romero-Gómez²

¹Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Westmead, Sydney, 2145 NSW, Australia.

Hepatology international

|June 20, 2024

概括

患有代谢功能障碍相关的脂肪肝疾病 (MAFLD) 的瘦肉患者的端粒较短,增加了他们的死亡风险. 这种端粒磨损与氧化应激有关,为MAFLD提供了潜在的治疗点.

科学领域:

肝病学肝病学是一种肝病学.
遗传学遗传学是一个
衰老研究研究衰老研究

背景情况:

具有代谢功能障碍相关的脂肪肝疾病 (MAFLD) 的瘦肉患者具有悖论性地显示出更高的死亡率,尽管代谢概况更好.
瘦肉MAFLD患者死亡率增加的潜在机制尚不清楚.
端粒衰减是一种已知的生物标志物,与各种疾病的死亡率增加有关.

研究的目的:

调查端粒长度在瘦肉MAFLD病变发生过程中的作用.
探索端粒长度,氧化应激和MAFLD患者的死亡率之间的关联.
为了检查反应性氧物种 (ROS) 对肝细胞中端粒长度的影响.

主要方法:

活检证明MAFLD的队列中端粒长度的分析 (n=303).
测量血清甲酸 (MDA) 和肝脏ROS标记物 (8-基氧氨酸,4-基-2-非氨酸).
评估生长/分化因子-15 (GDF-15) 和体外测试过氧化 (H2O2) 对肝细胞细胞系中端粒长度的影响.

主要成果:

与非瘦身患者相比,瘦身MAFLD患者的端粒长度显著缩短 (p < 0.001).
在瘦肉MAFLD患者中观察到ROS水平升高和GDF-15降低.
在肝细胞细胞系中,H2O2诱导端粒缩短和减少端粒活性,并且基线端粒缩短预测增加了全因死亡率,特别是在瘦个体中.

结论:

端粒长度差异部分解释了与非瘦身患者相比,在瘦身MAFLD患者中观察到的死亡率增加.
氧化应激和ROS激活在调解瘦肉MAFLD中端粒磨损的不良影响方面发挥着重要作用.
这些发现表明,针对端粒长度和氧化应激通路的潜在治疗策略可以改善MAFLD患者的治疗结果.

关键词:

简单的说来就是Lean Lean.马夫尔德 (MAFLD) 是一个死亡率死亡率死亡率这就是ROSOS ROS.泰洛米尔 (Telomere) 是一种电离体.

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