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Related Experiment Videos

Morphine enhances hepatitis C virus (HCV) replicon expression.

Yuan Li1, Ting Zhang, Steven D Douglas

  • 1Division of Immunologic and Infectious Diseases, Department of Pediatrics, Stokes Research Institute, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, 34th Street & Civic Center Boulevard, Philadelphia, PA 19104, USA.

The American Journal of Pathology
|August 26, 2003
PubMed
Summary

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Morphine significantly increases hepatitis C virus (HCV) replication in liver cells by activating NF-kappaB. This opioid may also reduce the effectiveness of interferon-alpha (IFN-alpha) therapy for HCV.

Area of Science:

  • Hepatology
  • Virology
  • Pharmacology

Background:

  • Substance abuse impact on hepatitis C virus (HCV) replication and disease progression is not well understood.
  • Investigating the role of morphine, a common substance of abuse, on HCV replication is crucial.

Purpose of the Study:

  • To determine if morphine affects HCV mRNA expression in liver cells.
  • To elucidate the underlying mechanisms of morphine's effect on HCV replication.
  • To assess morphine's influence on the efficacy of interferon-alpha (IFN-alpha) therapy.

Main Methods:

  • Utilized HCV replicon-containing human liver cells for in vitro experiments.
  • Administered morphine and opioid receptor antagonists (naltrexone, beta-funaltrexamine).
  • Assessed HCV mRNA levels and NF-kappaB promoter activity.

Related Experiment Videos

  • Evaluated the impact of morphine on IFN-alpha treatment.

    • Main Results:

    • Morphine significantly increased HCV mRNA expression in a dose-dependent manner.
    • The effect of morphine on HCV replication was blocked by opioid receptor antagonists.
    • Morphine activated the NF-kappaB promoter, which was responsible for increased HCV RNA expression.
    • Morphine diminished the anti-HCV effects of IFN-alpha.

    Conclusions:

    • Morphine acts as a positive regulator of HCV replication in human hepatic cells.
    • Morphine may compromise the effectiveness of IFN-alpha therapy for hepatitis C.
    • These findings highlight a potential mechanism by which substance abuse could worsen HCV disease.