Kidney Int:足细胞Lon蛋白酶1表达减少促进足细胞病变进展

2020-11-16 MedSci原创 MedSci原创

足细胞的线粒体功能障碍会导致肾小球疾病进展,虽然改善足细胞线粒体功能的具体治疗靶点尚不明确。新兴证据表明,线粒体功能障碍与足细胞病变的发病机制密切相关,但介导足细胞线粒体功能障碍的分子机制仍不清楚。L

足细胞的线粒体功能障碍会导致肾小球疾病进展,虽然改善足细胞线粒体功能的具体治疗靶点尚不明确。新兴证据表明,线粒体功能障碍与足细胞病变的发病机制密切相关,但介导足细胞线粒体功能障碍的分子机制仍不清楚。Lon蛋白酶1(Lonp1)是位于线粒体基质中的重要可溶性蛋白酶,尽管其在足细胞损伤中的确切作用尚未确定。

在该研究中,研究人员采用足细胞特异性Lon蛋白酶1敲除小鼠研究了这种足细胞蛋白酶在肾小球损伤和足细胞病变进展中的特异性作用。

肾小球Lonp1表达与蛋白尿相关

在肾活检样本中观察到,Lon蛋白酶1在肾小球中的表达水平下调,证实局灶性节段性肾小球硬化症和微小病变患者的尿蛋白水平与肾小球病变呈负相关。足细胞特异性缺失Lon蛋白酶1可引起严重的蛋白尿、重度肾损伤,最终导致小鼠死亡。

敲除Lonp1可导致肾功能障碍

在机制上,研究人员发现持续抑制足细胞Lon蛋白酶1可引起的线粒体稳态失衡和功能障碍,进而导致足细胞损伤和肾小球硬化。体外实验证实了Lon蛋白酶1的肾脏保护作用,该酶可抑制线粒体功能障碍和足细胞凋亡。

综上,该研究揭示了Lon蛋白酶1在足细胞中的调控作用,或可为足细胞肾病提供新的治疗方法。

原始出处:

Wei Gong, et al. Reduced Lon protease 1 expression in podocytes contributes to the pathogenesis of podocytopathy. Kidney International. November 09, 2020.

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    2021-09-28 canlab
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    2020-11-18 gwc389
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    2020-11-16 Nebula-Qin

    Lon蛋白酶1在足细胞中具有调控作用,或可为足细胞肾病提供新的治疗方法

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