Cannabinoid receptor agonist WIN55,212-2 and fatty acid amide hydrolase inhibitor URB597 suppress chronic cerebral hypoperfusion-induced neuronal apoptosis by inhibiting c-Jun N-terminal kinase signaling.

Neuroscience
S-H SuJian Hai

Abstract

The endocannabinoid system (ECS) has therapeutic potential for treating chronic cerebral hypoperfusion (CCH)-induced cerebral diseases. This study investigated the protective effects of two ECS compounds, cannabinoid receptor agonist WIN55,212-2 (WIN) and fatty acid amide hydrolase inhibitor URB597 (URB) on CCH-induced neuronal apoptosis in vivo. CCH was induced in male Sprague-Dawley rats by bilateral common carotid artery occlusion (BCCAo); the rats were then treated with WIN or URB for 12weeks and their spatial learning and memory abilities were assessed using the Morris water maze. Changes in neuronal number were examined by labeling neurons with an antibody against the neuronal nuclei antigen, and apoptosis of cortical and hippocampal CA1 neurons was detected by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling. The expression of B cell lymphoma (Bcl)-2, Bcl-2-associated X protein (Bax), and activated caspase-3 as well as mitogen-activated protein kinases including extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK), p38, phosphorylated (p-)ERK, p-JNK, and p-P38 was examined by Western blotting. Rats treated with WIN or URB showed better learning and memory performance than...Continue Reading

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Jul 1, 2019·Archives of Toxicology·Je-Oh LimJong-Choon Kim

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