The translocator protein (TSPO) is prodromal to mitophagy loss in neurotoxicity.

The translocator protein (TSPO) is prodromal to mitophagy loss in neurotoxicity.
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DOI:
10.1038/s41380-021-01050-z
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发表时间:
2021-07
影响因子:
11
通讯作者:
Campanella M
Campanella M
中科院分区:
医学1区
文献类型:
--
作者:
Frison M;Faccenda D;Abeti R;Rigon M;Strobbe D;England-Rendon BS;Cash D;Barnes K;Sadeghian M;Sajic M;Wells LA;Xia D;Giunti P;Smith K;Mortiboys H;Turkheimer FE;Campanella M

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线粒体功能障碍导致帕金森病(PD)。因此,揭示响应于病理线索而损害线粒体稳态的病原分子对于告知疾病的早期诊断和治疗至关重要,特别是在其特发性形式中。这项研究提出18 kDa的转运蛋白(TSPO)是其中之一。在体外和体内的数据表明,神经毒素,其表型模仿PD,增加TSPO,以增强细胞的氧化还原应激,多巴胺诱导的细胞死亡的易感性,和抑制泛素依赖性线粒体自噬。TSPO放大细胞外信号调节的蛋白激酶1和2(ERK 1/2)信号传导,形成正反馈,其抑制转录因子EB(TFEB)和溶酶体的受控产生。最后,转录组中的遗传差异证实了TSPO是在神经毒性期间改变自噬-溶酶体途径所必需的。
Dysfunctional mitochondria characterise Parkinson’s Disease (PD). Uncovering etiological molecules, which harm the homeostasis of mitochondria in response to pathological cues, is therefore pivotal to inform early diagnosis and therapy in the condition, especially in its idiopathic forms. This study proposes the 18 kDa Translocator Protein (TSPO) to be one of those. Both in vitro and in vivo data show that neurotoxins, which phenotypically mimic PD, increase TSPO to enhance cellular redox-stress, susceptibility to dopamine-induced cell death, and repression of ubiquitin-dependent mitophagy. TSPO amplifies the extracellular signal-regulated protein kinase 1 and 2 (ERK1/2) signalling, forming positive feedback, which represses the transcription factor EB (TFEB) and the controlled production of lysosomes. Finally, genetic variances in the transcriptome confirm that TSPO is required to alter the autophagy–lysosomal pathway during neurotoxicity.
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