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The Inhibitory Effect of S-777469, a Cannabinoid Type 2 Receptor Agonist, on Skin Inflammation in Mice.
Pharmacology 2017
We investigated the effects of S-777469 (1-[[6-Ethyl-1-[4-fluorobenzyl]-5-methyl-2-oxo-1, 2-dihydropyridine-3-carbonyl]amino]-cyclohexanecarboxylic acid), a novel cannabinoid type 2 receptor (CB2) agonist, on 1-fluoro-2,4-dinitrobenzene (DNFB)-induced ear inflammation and mite antigen-induced dermatitis in mice. The oral administration of S-777469 significantly suppressed DNFB-induced ear swelling in a dose-dependent manner. In addition, S-777469 significantly alleviated mite antigen-induced atopic dermatitis-like skin lesions in NC/Nga mice. A histological analysis revealed that S-777469 significantly reduced the epidermal thickness and the number of mast cells infiltrating skin lesions. We demonstrated that S-777469 inhibited mite antigen-induced eosinophil accumulation in skin lesions and an endogenous CB2 ligand, 2-arachidonoylglycerol (2-AG)-induced eosinophil migration in vitro. Moreover, we confirmed that 2-AG levels significantly increased in skin lesions of mite antigen-induced dermatitis model. Together, these results suggest that S-777469 inhibits skin inflammation in mice by blocking the activities of 2-AG.
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