Platelet activating factor receptor blockade alone or in combination with leukotriene synthesis inhibition does not ameliorate alpha-naphthylisothiocyanate-induced hepatotoxicity

Toxicology Letters
M B BailieR A Roth

Abstract

Alpha-naphthylisothiocyanate (ANIT) is a cholangiolitic hepatotoxicant that causes periportal edema, hepatic parenchymal and biliary epithelial cell necrosis, and cholestasis in the rat. A hallmark of ANIT hepatotoxicity is periportal inflammation that includes neutrophil infiltration. Neutrophils are requisite for the expression of ANIT-induced liver injury; however, the mechanism(s) of neutrophil accumulation in the liver and the role of these cells in ANIT hepatotoxicity is incompletely understood. Platelet activating factor (PAF) is a proinflammatory agent that is both a chemoattractant for and an activator of neutrophils. Therefore, we evaluated the role of PAF in ANIT-induced liver injury. Rats were treated with the PAF receptor antagonist, WEB 2086 (WEB), to determine if it afforded protection from ANIT hepatotoxicity. In a separate study, a combination of WEB and the leukotriene synthesis inhibitor, Zileuton (ZIL), was used to address the possible interaction of PAF and leukotrienes in ANIT-induced liver injury. Treatment of rats with WEB, alone or in combination with Zileuton, did not attenuate ANIT-induced liver injury as assessed by increases in plasma alanine aminotransferase or gamma-glutamyl transferase activities...Continue Reading

References

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Citations

Nov 25, 2003·Prostaglandins & Other Lipid Mediators·Ramin Farzaneh-Far, Kevin Moore
May 8, 2004·American Journal of Physiology. Gastrointestinal and Liver Physiology·Junquan XuJacquelyn J Maher
Apr 28, 2012·Immunopharmacology and Immunotoxicology·Alexandra Ivo de MedeirosRoberto G S Berlinck
Oct 19, 2007·Toxicologic Pathology·Shashi K Ramaiah, Hartmut Jaeschke
Jun 15, 2006·World Journal of Gastroenterology : WJG·Nikolaos-P KaridisStamatios-E Theocharis

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