A Potential Role for SerpinA3N in Acetaminophen-Induced Hepatotoxicity

Overview

Journal Mol Pharmacol

Specialties Molecular Biology
Pharmacology

Date 2021 Jan 13

PMID 33436521

Citations 3

Authors

Melanie Tran

Jianguo Wu

Li Wang

Dong-Ju Shin

Affiliations

Soon will be listed here.

Abstract

Acetaminophen (APAP) is a commonly used pain and fever reliever but is also the most frequent cause of drug-induced liver injury. The mechanism pertaining acetaminophen toxicity has been well documented, whereas mechanisms of hepatotoxicity are not well established. Serine (or cysteine) peptidase inhibitor, clade A, member 3N (SerpinA3N), a serine protease inhibitor, is synthesized in the liver but the role of SerpinA3N in relation to APAP-induced liver injury is not known. Wild-type and hepatocyte-specific SerpinA3N knockout (HKO) mice were injected intraperitoneally with a single dose of PBS or APAP (400 mg/kg) for 12 hours, and markers of liver injury, cell death, and inflammation were assessed. SerpinA3N expression was highly induced in mice with APAP overdose. SerpinA3N HKO mice had diminished liver injury and necrosis as shown by lower alanine aminotransferase and interleukin-6 levels, accompanied by suppressed inflammatory cytokines and reduced neutrophil infiltration. The reduced oxidative stress was associated with enhanced antioxidant enzyme capabilities. Taken together, hepatocyte SerpinA3N deficiency reduced APAP-induced liver injury by ameliorating inflammation and modulating the 5' AMP-activated protein kinase-unc-51-like autophagy activating kinase 1 signaling pathway. Our study provides novel insights into a potential role for SerpinA3N in APAP-induced liver injury. SIGNIFICANCE STATEMENT: Our studies indicate that serine (or cysteine) peptidase inhibitor, clade A, member 3N (SerpinA3N) may have a pathophysiological role in modulating acetaminophen (APAP)-induced liver injury. More specifically, mice with hepatic deletion of SerpinA3N suppressed inflammation and liver injury to reduce APAP-induced hepatotoxicity. Controlling the inflammatory response offers possible approaches for novel therapeutics; therefore, understanding the pathophysiological role of SerpinA3N in inducing liver injury may add to the development of more efficacious treatments.

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