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Suppression of immunological functions in morphine addicted mice
W K Ho1, K W Cheung, K N Leung
1Department of Biochemistry, Chineses University of Hong Kong.
NIDA Research Monograph
|January 1, 1986
Summary
Morphine addiction impairs immune cell functions in mice, including mitogenesis and natural killer cell activity. Opioid peptide levels in lymph nodes were also found to be depressed.
Area of Science:
- Immunology
- Neuroscience
- Pharmacology
Background:
- Opioid addiction is a significant public health concern.
- Morphine, a potent opioid analgesic, is frequently misused.
- Opioid use can affect various physiological systems, including the immune system.
Purpose of the Study:
- To investigate the impact of morphine addiction on immune cell function in mice.
- To examine specific immunological parameters in morphine-addicted mice.
- To assess the levels of endogenous opioid peptides in lymph nodes of addicted mice.
Main Methods:
- Isolation of lymphocytes from morphine-addicted and control mice.
- Assessment of Concanavalin A (Con A) stimulated mitogenesis.
- Measurement of Natural Killer (NK) cell activity.
- Evaluation of plaque-forming cell activity and delayed-type hypersensitivity.
- Quantification of met-enkephalin and beta-endorphin levels in lymph nodes.
Main Results:
- Lymphocytes from morphine-addicted mice exhibited impaired Con A stimulated mitogenesis.
- Reduced Natural Killer (NK) cell activity was observed in addicted mice.
- Plaque-forming cell activity and delayed-type hypersensitivity were also diminished.
- Significant depression in met-enkephalin and beta-endorphin levels within the lymph nodes of addicted mice.
Conclusions:
- Morphine addiction leads to a broad spectrum of immunological dysfunctions in mice.
- The observed immune deficits may be linked to altered endogenous opioid peptide levels.
- These findings highlight the complex interplay between opioid addiction and immune system integrity.