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- W3011955349 abstract "BACKGROUND AND PURPOSE Protective mechanisms of the endogenous cannabinoid system against drug-induced liver injury (DILI) are actively being investigated regarding the differential regulatory role of the cannabinoid CB1 and CB2 receptors in liver fibrogenesis and inflammation. EXPERIMENTAL APPROACH The 2-arachidonoylglycerol (2-AG)-related signalling receptors and enzymatic machinery, and inflammatory/fibrogenic factors were investigated in the liver of a mouse model of hepatotoxicity induced by acute and repeated overdoses (750 mg·kg-1 ·day-1 ) of paracetamol (acetaminophen), previously treated with selective CB1 (ACEA) and CB2 (JWH015) agonists (10 mg·kg-1 ), or lacking CB1 and CB2 receptors. KEY RESULTS Acute paracetamol increased the expression of CB2 , ABHD6 and COX-2, while repeated paracetamol increased that of CB1 and COX-2 and decreased that of DAGLβ. Both acute paracetamol and repeated paracetamol decreased the liver content of acylglycerols (2-AG, 2-LG and 2-OG). Human liver samples from a patient suffering APAP hepatotoxicity confirmed CB1 and CB2 increments. Acute paracetamol-exposed CB2 KO mice had higher expression of the fibrogenic αSMA and the cytokine IL-6 and lower apoptotic cleaved caspase 3. CB1 deficiency enhanced the repeated APAP-induced increases in αSMA and cleaved caspase 3 and blocked those of CYP2E1, TNF-α, the chemokine CCL2 and the circulating γ-glutamyltransferase (γGT). Although JWH015 reduced the expression of αSMA and TNF-α in acute paracetamol, ACEA increased the expression of cleaved caspase 3 and CCL2 in repeated paracetamol. CONCLUSION AND IMPLICATIONS The differential role of CB1 versus CB2 receptors on inflammatory/fibrogenic factors related to paracetamol-induced hepatotoxicity should be considered for designing alternative therapies against DILI." @default.
- W3011955349 created "2020-03-23" @default.
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- W3011955349 date "2020-04-15" @default.
- W3011955349 modified "2023-10-17" @default.
- W3011955349 title "Differential hepatoprotective role of the cannabinoid CB <sub>1</sub> and CB <sub>2</sub> receptors in paracetamol‐induced liver injury" @default.
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- W3011955349 doi "https://doi.org/10.1111/bph.15051" @default.
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