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ESE1 is Associated with Neuronal Apoptosis in Lipopolysaccharide Induced Neuroinflammation.
Neurochemical Research 2016 October
Neuronal apoptosis induced by the over-activation of microglia during neuroinflammation contributes to the pathology of central nervous system (CNS) degenerative diseases. ESE1 regulates apoptosis of intestinal epithelial cells in ulcerative colitis via accelerating NF-κB activation. NF-κB activation participates in neuronal apoptosis. However, the expression and functions of ESE1 in neuronal apoptosis during CNS inflammatory response remain unclear. In present study, ESE1 expression significantly increased in cerebral cortex after lipopolysaccharide (LPS) intracerebroventricular injection. Immunofluorescence staining indicated that ESE1 was located in neurons. Furthermore, there was a concomitant up-regulation of apoptotic markers including active caspase-3, BAX and decreased expression of anti-apoptosis protein Bcl-2. In vitro, ESE1 depletion in cortical primary neurons inhibited active caspase-3 and BAX expression as well as lactate dehydrogenase (LDH) release with up-regulation of Bcl-2, while ESE1 overexpression can exert opposite effects, indicating that ESE1 promoted neuronal apoptosis induced by LPS or LPS exposed microglia conditioned media (CM). ESE1 accelerated NF-κB activation in neurons with CM treatment. Collectively, all these data suggested that ESE1 might boost neuronal apoptosis during neuroinflammation via up-regulating NF-κB activation. These findings have implications on the potential target of ESE1 in CNS inflammation treatment.
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