Ethanol-induced damage to the developing spinal cord: The involvement of CCR2 signaling

BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE

卷:1863

Article

Ren, Zhenhua^1,2  Wang, Xin²  Yang, Fanmuyi²  Xu, Mei²  Frank, Jacqueline A.²  Wang, Haiping²  Wang, Siying^1,2  Ke, Zun-ji³  Luo, Jia^2,3 

[1] Anhui Med Univ, Sch Basic Med, Dept Anat, Hefei 230032, Anhui, Peoples R China

[2] Univ Kentucky, Coll Med, Dept Pharmacol & Nutr Sci, 132 Hlth Sci Res Bldg,1095 Vet Dr, Lexington, KY 40536 USA

[3] Shanghai Univ Tradit Chinese Med, Dept Biochem, Shanghai 201203, Peoples R China

关键词: Alcohol;    Apoptosis;    Development;    Inflammation;    Neurodegeneration;   

DOI  :  10.1016/j.bbadis.2017.07.035

来源: Elsevier

【 摘 要 】

Ethanol exposure during development causes fetal alcohol spectrum disorders (FASD). A large body of evidence shows that ethanol produces multiple abnormalities in the developing central nervous system (CNS), such as smaller brain size, reduced volume of cerebral white matter, permanent loss of neurons, and alterations in synaptogenesis and myelinogenesis. The effects of ethanol on the developing spinal cord, however, receive little attention and remain unclear. We used a third trimester equivalent mouse model to investigate the effect of ethanol on the developing spinal cord. Ethanol caused apoptosis and neurodegeneration in the dorsal horn neurons of mice of early postnatal days, which was accompanied by glial activation, macrophage infiltration, and increased expression of CCR2, a receptor for monocyte chemoattractant protein 1 (MCP-1). Ethanol-induced neuronal death during development resulted in permanent loss of spinal cord neurons in adult mice. Ethanol stimulated endoplasmic reticulum (ER) stress and oxidative stress, and activated glycogen synthase kinase 3 beta (GSK3 beta) and c-Jun N-terminal kinase (JNK) pathways. Knocking out MCP-1 or CCR2 made mice resistant to ethanol-induced apoptosis, ER stress, glial activation, and activation of GSK3 beta and JNK. CCR2 knock out offered much better protection against ethanol-induced damage to the spinal cord. Thus, developmental ethanol exposure caused permanent loss of spinal cord neurons and CCR2 signaling played an important role in ethanol neurotoxicity.

【 授权许可】

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