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Related Experiment Videos

Morphine-induced immune alterations in vivo.

P K Arora1, E Fride, J Petitto

  • 1Laboratory of Neuroscience, NIDDK, National Institutes of Health, Bethesda, Maryland 20892.

Cellular Immunology
|April 1, 1990
PubMed
Summary

Morphine treatment in mice caused a significant increase in CD4+/CD8+ cell ratios in immune organs. This immune alteration suggests opiates may increase susceptibility to HIV infection and AIDS development.

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Area of Science:

  • Immunology
  • Virology
  • Pharmacology

Background:

  • High human immunodeficiency virus (HIV) seropositivity rates are observed in drug abusers.
  • Opiate abuse is a significant public health concern linked to increased infectious disease risk.

Purpose of the Study:

  • To investigate the impact of chronic morphine administration on immune system components relevant to HIV infection.
  • To explore the potential role of opiates as cofactors in HIV susceptibility.

Main Methods:

  • Chronic morphine treatment was administered to a mouse model.
  • Flow cytometry was used to analyze immune cell populations, specifically CD4+ and CD8+ T-cells, in spleen and thymus.
  • Cellular morphology of immune organs was assessed.

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Main Results:

  • A robust and sustained elevation in the CD4+/CD8+ cell ratio was observed in the spleen and thymus of morphine-treated mice.
  • Marked cellular atrophy was noted, primarily affecting immune system organs.
  • CD4+ T-cells, known targets for HIV, showed altered ratios.

Conclusions:

  • Chronic morphine exposure induces significant changes in immune cell profiles, particularly increasing the CD4+/CD8+ ratio.
  • These opiate-induced immune alterations may enhance host susceptibility to HIV infection.
  • Opiates could act as cofactors, contributing to the higher incidence of HIV and AIDS in opiate abusers.