4.5 Article

Methamphetamine mediates apoptosis of vascular smooth muscle cells via the chop-related endoplasmic reticulum stress pathway

期刊

TOXICOLOGY LETTERS
卷 350, 期 -, 页码 98-110

出版社

ELSEVIER IRELAND LTD
DOI: 10.1016/j.toxlet.2021.06.019

关键词

Methamphetamine; Vascular smooth muscle cell; Endoplasmic reticulum stress; Chop; Apoptosis

资金

  1. Guangzhou Sci-Tech Project [201803010005, 201707010302]
  2. Medical Scientific Research Foundation of Guangdong Province of China [B2018145]

向作者/读者索取更多资源

The study found that METH can induce apoptosis of vascular smooth muscle cells and regulate the apoptosis process through the endoplasmic reticulum stress pathway. Chop plays an important role in the endoplasmic reticulum stress and apoptosis induced by METH, and may be a potential therapeutic target for METH-induced VSMC injury.
Methamphetamine (METH) is a highly addictive amphetamine-type drug that has caused persistent harm to society and human health in recent years. Most studies have shown that METH severely damages the central nervous system, and this drug has been found to be toxic to the cardiovascular system in recent years. Therefore, we hypothesized that METH may also damage vascular smooth muscle. We examined the expression of the apoptosis-related proteins Caspase 3 and PARP after METH treatment in vivo and in vitro and detected the expression of endoplasmic reticulum stress-related proteins. After treatment with the endoplasmic reticulum stress inhibitor 4-PBA, changes in the above indicators were examined. C/EBP homologous protein (Chop) expression was also detected, and the relationship between endoplasmic reticulum stress and apoptosis was further determined by siRNA silencing of Chop. The results indicated that METH can induce apoptosis of vascular smooth muscle cells (VSMCs) and upregulate the expression of Chop and endoplasmic reticulum stress-related proteins. Chop inhibits protein kinase B phosphorylation and further inhibits forkhead box class O3a (Foxo3a) dephosphoryla-tion, resulting in increased p53 upregulated molecular of apoptosis (PUMA) transcription. Increased PUMA induces apoptosis through the mitochondrial pathway. These results indicate that Chop is involved in the METH-induced endoplasmic reticulum stress and apoptosis in VSMCs and may be a potential therapeutic target for METH-induced VSMC injury. (c) 2021 Elsevier B.V. All rights reserved.

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