Abstract
High-mobility group box-1 (HMGB1) acts as a proinflammatory molecule once released into the extracellular space and inhibition of HMGB1 signaling has been reported be neuroprotective in neurodegenerative diseases. Besides, chronic cerebral hypoperfusion (CCH) causes cognitive impairment in neurodegenerative diseases. Here we tested the protective role of HMGB1 inhibition using anti-HMGB1 neutralizing antibody (Ab) against CCH in rats after bilateral common carotid artery occlusion (2VO). 169 male Sprague-Dawley rats underwent 2VO or sham operation. PBS, anti-HMGB1 Ab (1 mg/kg), or control IgG Ab (1 mg/kg) was intravenously administered post-operation. HMGB1 translocation, blood-brain barrier (BBB) permeability and glial activation were evaluated at 3 d, as well as the levels of inflammatory cytokines and oxidative stress. NeuN immunostaining and Morris Water Maze (MWM) were performed at 3 d, 4 w and 12 w. We found that anti-HMGB1 neutralizing Ab inhibited HMGB1 translocation in hippocampal CA1 subarea and improved hippocampal HMGB1 level. Besides, anti-HMGB1 Ab preserved BBB integrity and reduced glial activation, in association with the related changes in oxidative stress (increased activities of superoxide dismutase (SOD) and...Continue Reading
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