title: Differential postnatal development of mu and delta opiate receptors.
abstract: We found a differential postnatal development of mu and delta opiate receptors. Mu receptors labelled with low concentrations of [3H]naloxone appeared to develop earlier than did delta receptors labelled with [3H]D-Ala2-D-Leu5-enkephalin (0.5 nM). Competition binding studies also revealed a delayed appearance of delta receptors (day 12 postnatal).
mesh_terms: D000375:Aging; D000818:Animals; D001921:Brain / Q000254:growth & development* / Q000378:metabolism; D004723:Endorphins / Q000378:metabolism*; D016308:Enkephalin, Leucine-2-Alanine; D004745:Enkephalins / Q000378:metabolism*; D007700:Kinetics; D009270:Naloxone / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D011957:Receptors, Opioid / Q000378:metabolism*; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu
chemical_list: D004723:Endorphins; D004745:Enkephalins; D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu; D009270:Naloxone; D016308:Enkephalin, Leucine-2-Alanine