Naltrexone-induced opiate receptor supersensitivity

  title={Naltrexone-induced opiate receptor supersensitivity},
  author={R Suzanne Zukin and Jonathan R. Sugarman and M L Fitz-Syage and Eliot L. Gardner and Alan R. Gintzler},
  journal={Brain Research},
Chronic administration of the long-lived narcotic antagonist naltrexone resulted in a marked increase in brain opiate receptors. Similar changes in receptor density were observed for binding of the putative mu agonist [3H]dihydromorphine, the mu antagonist [3H]naloxone, the putative delta ligand [3H]D-Ala2,D-Leu5-enkephalin and [3H]etorphine. In addition, the sensitivity of agonist binding to guanyl nucleotide inhibition increased significantly. In contrast, no such changes in opiate binding… CONTINUE READING

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