Role of Bcl-2 adenovirus/E1B 19kD interacting protein 3 in oligodendrocyte apoptosis after diffuse axonal injury

doi:10.16098/j.issn.0529-1356.2021.04.003

Abstract

Abstract:

Objective To investigate the role of Bcl-2 adenovirus/E1B 19kD interacting protein 3 (BNIP3) in oligodendrocyte apoptosis after diffuse axonal injury (DAI) in rats. Methods Seventy-seven male adult Sprague-Dawley rats were randomly divided into sham group (n=11), DAI group (n=33), and intervention group (n=33). DAI model was made referring to modified Marmarou method and the rats in intervention group received intracerebroventricular injection of BNIP3 inhibitor, necrostatin-1(Nec -1,30 g/L, 2 μl) immediately after injury. Tested the BNIP3 protein expression, oligodendrocyte apoptosis and myelin histopathology before and after the intervention of Nec-1. Results Compared with the sham group, DAI rats upregulated BNIP3 levels and had positive correlation with cell apoptosis in brainstem. Nec-1 significantly inhibited BNIP3 expression, then decreased the number of apoptotic oligodendrocytes, increased the average absorbance of luxol fast blue(LFB) staining and myelin basic protein (MBP) levels, and alleviated the myelin ultrastructure of DAI rats. Conclusion BNIP3 participate in the DAI-induced apoptosis of oligodendrocytes, and inhibition of BNIP3 can protect oligodendrocytes and myelin sheath from DAI injury.

Key words: Diffuse axonal injury, Bcl-2 adenovirus/E1B 19kD interacting protein 3, Oligodendrocyte, Myelin, Immunohistochemistry, Western blotting, Rat

CLC Number:

651.1⁺5

WANG Ting-ting MU Jiao LI Mei-yu YU Hong JIANG Cong-zheng ZHANG Xiao-li ZHANG Guo-hui. Role of Bcl-2 adenovirus/E1B 19kD interacting protein 3 in oligodendrocyte apoptosis after diffuse axonal injury[J]. Acta Anatomica Sinica, 2021, 52(4): 512-519.

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