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Antisense oligonucleotides to human SQA-neuropeptide FF decrease morphine tolerance and dependence in mice

A Gelot1, B Francés, S Gicquel

  • 1Institut de Pharmacologie et de Biologie Structurale, CNRS, Toulouse, France.

European Journal of Pharmacology
|November 21, 1998
PubMed
Summary
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Neuropeptide FF plays a key role in opioid dependence. Inhibiting its precursor gene reduced morphine tolerance and withdrawal symptoms in mice, highlighting its potential in addiction treatment.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Molecular Biology

Background:

  • Neuropeptide FF (NPFF) is known to modulate opioid analgesia.
  • The precise role of NPFF in opioid tolerance and withdrawal remains to be fully elucidated.

Purpose of the Study:

  • To investigate the role of Neuropeptide FF (NPFF) in the development of morphine tolerance and withdrawal syndrome.
  • To determine if NPFF signaling influences the antinociceptive effects of morphine.

Main Methods:

  • Intracerebroventricular administration of antisense-oligodeoxynucleotides targeting the NPFF precursor gene in mice.
  • Assessment of morphine antinociception using the mouse tail flick test.
  • Evaluation of morphine tolerance and naloxone-precipitated withdrawal syndrome.
  • Measurement of NPFF-immunoreactivity and effects of NPFF receptor agonist administration.

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Main Results:

  • Antisense-oligonucleotides, but not mismatch-oligonucleotides, significantly attenuated morphine tolerance and naloxone-induced withdrawal syndrome.
  • Neither antisense nor mismatch oligonucleotides altered NPFF-immunoreactivity in the whole brain.
  • Repeated administration of an NPFF receptor agonist exacerbated morphine tolerance.

Conclusions:

  • Neuropeptide FF signaling is critically involved in the development of opioid pharmacodependence.
  • Targeting NPFF pathways may offer a novel therapeutic strategy for managing opioid tolerance and withdrawal.
  • NPFF does not appear to influence the acute antinociceptive effects of morphine.