Correlation between the number of placental opioid receptors, mode of delivery, and maternal narcotic use

Mahmoud Ahmed, Jay S. Schinfeld, R. Jones, A. G. Cavinato, C. Baker

Research output: Contribution to journalArticle

10 Scopus citations


Human placental opioid receptors were assayed using the radioactive opioid agonist, etorphine, to determine the number of binding sites in villous tissue membrane preparations. Significant differences in receptor concentration per milligram of protein of tissue were found between placentas obtained following vaginal or abdominal delivery (P < 0.002). Labor itself did not alter apparent receptor numbers. In patients with maternal narcotic abuse during pregnancy, no opioid binding could be detected regardless of the mode of delivery, suggesting possible receptor down-regulation.

Original languageEnglish (US)
Pages (from-to)255-267
Number of pages13
JournalMolecular Membrane Biology
Issue number3
StatePublished - 1986
Externally publishedYes


ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology
  • Biochemistry

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