The role of chaperone-mediated autophagy in neurotoxicity induced by alpha-synuclein after methamphetamine exposure
The role of chaperone-mediated autophagy in neurotoxicity induced by alpha-synuclein after methamphetamine exposure
复制标题
伴侣介导的自噬在甲基苯丙胺暴露后α-突触核蛋白诱导的神经毒性中的作用
DOI：
10.1002/brb3.1352
复制
发表时间：
2019
影响因子：
3.1
通讯作者：
Qiu Pingming
中科院分区：
文献类型：
--
作者：
Sun Leping;Lian Yongling;Ding Jiuyang;Meng Yunle;Li Chen;Chen Ling;Qiu Pingming
IntroductionChaperone‐mediated autophagy (CMA) is an autophagy–lysosome pathway (ALP) that is different from the other two lysosomal pathways, namely, macroautophagy and microautophagy, and can selectively degrade cytosolic proteins in lysosomes without vesicle formation. CMA activity declines in neurodegenerative diseases such as Parkinson's disease, and similar neurotoxicity can occur after methamphetamine (METH) treatment. The relationship between CMA and METH‐induced neurotoxicity is not clear.MethodsWe detected changes in the chaperone protein Hsc70 and the lysosomal surface receptor Lamp‐2a after METH treatment and then regulated these two proteins by small interfering RNA and DNA plasmid transfection to investigate how CMA influences METH‐induced neurotoxicity.ResultsWe found that CMA activity is decreased after METH exposure in neurons and downregulated Lamp‐2a can aggravate the neurotoxicity induced by α‐Syn after METH exposure and that Hsc70 overexpression can relieve the abnormal levels of alpha‐synuclein and its aggregate forms and the increase in cell apoptosis induced by METH.ConclusionsThe results provide in vivo evidence for CMA plays a pivotal role in METH‐induced neurotoxicity, and upregulation of Hsc70 expression significantly protects neuronal cells against METH‐induced toxicity. This research may pave the way for potential therapeutic approaches targeting CMA for METH abuse and neurodegenerative disorders.
