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Pathophysiological significance of c-jun N-terminal kinase in acetaminophen hepatotoxicity

Kuo Du1, Yuchao Xie1, Mitchell R McGill1

  • 1a University of Kansas Medical Center, Department of Pharmacology, Toxicology and Therapeutics , Kansas City, KS, USA +1 913 588 7969 ; +1 913 588 7501 ; hjaeschke@kumc.edu.

Expert Opinion on Drug Metabolism & Toxicology
|July 21, 2015
PubMed
Abstract

Insights

Acetaminophen (APAP) overdose causes liver failure. While c-jun N-terminal Kinase (JNK) is a potential target, its role in APAP liver injury remains controversial, requiring further research.

Area of Science:

  • Hepatology
  • Toxicology
  • Molecular Biology

Background:

  • Acetaminophen (APAP) overdose is a primary cause of acute liver failure in the U.S.
  • Current therapeutic options for APAP-induced liver injury are limited, necessitating novel treatment strategies.
  • c-jun N-terminal Kinase (JNK) signaling pathways have been identified as a potential therapeutic target.

Purpose of the Study:

  • To review and reconcile conflicting findings regarding the role of JNK activation in APAP hepatotoxicity.
  • To critically evaluate the therapeutic potential of targeting JNK for APAP poisoning.

Main Methods:

  • Review of early and recent studies on JNK activation in APAP hepatotoxicity.
  • Analysis of discrepancies in findings related to JNK deficiency and inhibitor effects.
  • Examination of recent studies showing variable effects on liver injury independent of JNK activation.

Main Results:

  • Early studies suggested a critical role for JNK activation and mitochondrial translocation in APAP hepatotoxicity.
  • Subsequent studies failed to consistently reproduce the protective effects of JNK deficiency.
  • Recent research indicates that liver injury can be modulated with or without significant changes in JNK activation.

Conclusions:

  • JNK remains a potential therapeutic target for APAP poisoning.
  • Significant controversies persist regarding the precise role of JNK in APAP-induced liver injury.
  • Further investigation with specific inhibitors in preclinical models and human hepatocytes is essential to validate JNK as a therapeutic target.
Keywords:
acetaminophenc-jun N-terminal kinasedrug hepatotoxicitymitochondrial dysfunction

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