Autophagy:抗抑郁药舍曲林靶向线粒体VDAC1蛋白调控自噬

2020-11-02 haibei MedSci原创

研究人员进一步表明,Sert通过诱导自噬,促进MAPT(微管相关蛋白tau)蛋白的自噬降解,从而抑制tau病。

自噬是一种高度保守的细胞内过程,它能清除细胞中错误折叠或老化的蛋白质,并回收受损的细胞器。自噬在维持细胞稳态方面起着关键作用,因为它能调节分解代谢,通过回收受损或老化的线粒体来缓解活性氧(ROS)的产生,并保护细胞免受外源性或内源性刺激的影响,如营养物质匮乏、氧气耗竭、病原体入侵(包括细菌和病毒)以及紫外线照射等。

自噬的失调与神经退行性疾病、血管再狭窄、白血病、癌症和衰老等多种疾病有关。因此,开发自噬调节剂成为治疗疾病的重要策略。

阿尔茨海默病是神经退行性疾病之一,涉及炎症和自噬缺陷。其特点是认知能力不可逆地大量丧失,并在神经元皮层形成由MAPT(微管相关蛋白tau)聚集物和淀粉样蛋白β组成的病态斑块复合物。自噬诱导剂被认为可以促进AD脑内有害蛋白的降解。因此,人们对开发可与其他AD疗法一起使用的强效自噬诱导剂的需求很高。

最近,研究人员在Autophagy杂志报道了一种抗抑郁药物,舍曲林(Sert),是一种自噬诱导剂。从机制上讲,Sert潜在地结合并拮抗线粒体VDAC1(电压依赖性阴离子通道1),导致细胞ATP(三磷酸腺苷)水平降低,激活AMP激活蛋白激酶(AMPK),并抑制其下游的MTOR(雷帕霉素激酶的机制性靶点)-RPS6KB1(核糖体蛋白S6激酶B1)信号通路。

缺乏VDAC1表达的细胞中,Sert完全丧失了对AMPK-MTOR通路和自噬诱导活性的调节作用。研究人员进一步表明,Sert通过诱导自噬,促进MAPT(微管相关蛋白tau)蛋白的自噬降解,从而抑制tau病。

因此,该研究证明了Sert作为一种新型小分子自噬诱导剂的潜力,并提供了一种通过靶向VDAC1治疗自噬相关疾病的新候选药物。

 

原始出处:

Hui-Yun Hwang et al. Antidepressant drug sertraline modulates AMPK-MTOR signaling-mediated autophagy via targeting mitochondrial VDAC1 protein. Autophagy (2020). DOI: https://doi.org/10.1080/15548627.2020.1841953

 

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    2021-03-13 wetgdt
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    2020-11-04 lichifeng

    长见识啦

    0

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    2020-11-02 1e16b3b8m12(暂无匿称)

    学习了谢谢

    0

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    2020-11-02 ms3000000568632153

    学习

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    2020-11-02 lovetcm

    #舍曲林#靶向#线粒体#VDAC1蛋白调控#自噬#

    0

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