Acrolein Aggravates Secondary Brain Injury After Intracerebral Hemorrhage Through Drp1-Mediated Mitochondrial Oxidative Damage in Mice

• 作者: Dayun Feng Haixiao Liu Hao Bai Hao Guo Jianing Luo Lei Zhao Longlong Zheng Wei Guo Wenxing Cui Xun Wu Yan Qu
• 来源期刊: 神经科学通报（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: Original Articles
• 页码范围: 1158-1170
• 页数: 13页
• 语种: 英文

摘要

Clinical advances in the treatment of intracranial hemorrhage (ICH) are restricted by the incomplete understanding of the molecular mechanisms contributing to secondary brain injury.Acrolein is a highly active unsaturated aldehyde which has been implicated in many nervous system diseases.Our results indicated a significant increase in the level of acrolein after ICH in mouse brain.In primary neurons,acrolein induced an increase in mitochondrial fragmentation,loss of mitochondrial membrane potential,generation of reactive oxidative species,and release of mitochondrial cytochrome c.Mechanistically,acrolein facilitated the translocation of dynaminrelated protein1 (Drp1) from the cytoplasm onto the mitochondrial membrane and led to excessive mitochondrial fission.Further studies found that treatment with hydralazine (an acrolein scavenger) significantly reversed Drp1 translocation and the morphological damage of mitochondria after ICH.In parallel,the neural apoptosis,brain edema,and neurological functional deficits induced by ICH were also remarkably alleviated.In conclusion,our results identify acrolein as an important contributor to the secondary brain injury following ICH.Meanwhile,we uncovered a novel mechanism by which Drp1-mediated mitochondrial oxidative damage is involved in acroleininduced brain injury.