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Related Experiment Videos

Naloxone blocks the interferon-alpha induced changes in hypothalamic neuronal activity.

T Nakashima1, T Hori, K Kuriyama

  • 1Department of Physiology, Saga Medical College, Japan.

Neuroscience Letters
|December 4, 1987
PubMed
Summary

Recombinant human interferon-alpha (IFN-alpha) affects hypothalamic neuron activity, potentially via opiate receptors. Naloxone (NLX) blocks these IFN-alpha-induced changes, suggesting a link between interferon and the opioid system.

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Area of Science:

  • Neuroscience
  • Immunology
  • Endocrinology

Background:

  • Interferon-alpha (IFN-alpha) is a cytokine with diverse biological effects.
  • The hypothalamus plays a crucial role in regulating various physiological functions.
  • Opiate receptors are involved in numerous central nervous system processes.

Purpose of the Study:

  • To investigate the effects of recombinant human interferon-alpha (IFN-alpha) on neuronal activity in the preoptic and anterior hypothalamus (PO/AH) and ventromedial hypothalamus (VMH).
  • To determine if naloxone (NLX), an opioid receptor antagonist, can modulate the effects of IFN-alpha on these hypothalamic neurons.

Main Methods:

  • Single neuron activity was recorded in hypothalamic tissue slices.
  • Neurons in the PO/AH and VMH were perfused with physiological doses of IFN-alpha.

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  • The effects of IFN-alpha were examined with and without the simultaneous application of NLX.

    • Main Results:

    • IFN-alpha decreased the firing rate of most PO/AH neurons.
    • IFN-alpha increased the firing rate of most VMH neurons.
    • NLX administration reversibly blocked or attenuated the IFN-alpha-induced changes in neuronal firing rates in both regions.

    Conclusions:

    • IFN-alpha influences neuronal activity in key hypothalamic areas (PO/AH and VMH).
    • The observed effects of IFN-alpha on hypothalamic neurons are mediated, at least in part, through opiate receptors.
    • These findings suggest a potential interaction between the interferon and opioid systems within the hypothalamus.