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Effects of Chronic Morphine Treatment on Β-Endorphin-Related Peptides in the Caudal Medulla and Spinal Cord

dc.contributor.authorBronstein, David M.en_US
dc.contributor.authorGutstein, Howard B.en_US
dc.contributor.authorAkil, Hudaen_US
dc.date.accessioned2010-04-01T15:11:32Z
dc.date.available2010-04-01T15:11:32Z
dc.date.issued1993-06en_US
dc.identifier.citationBronstein, David M.; Gutstein, Howard B.; Akil, Huda (1993). "Effects of Chronic Morphine Treatment on Β-Endorphin-Related Peptides in the Caudal Medulla and Spinal Cord." Journal of Neurochemistry 60(6): 2304-2307. <http://hdl.handle.net/2027.42/65660>en_US
dc.identifier.issn0022-3042en_US
dc.identifier.issn1471-4159en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/65660
dc.identifier.urihttp://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=8492132&dopt=citationen_US
dc.description.abstractThe effects of chronic morphine treatment on Β-endorphin (ΒE)-immunoreactive (ΒE-ir) peptide levels were determined in the rat caudal medulla and different areas of the spinal cord. Seven days of morphine pelleting had no effect on total ΒE-ir peptides in the caudal medulla. In contrast, it significantly increased ΒE-ir peptide concentrations in the cervical and thoracic regions of the spinal cord compared with placebo-pelleted controls, whereas in the lumbosacral region this trend did not reach statistical significance. Injections of the opiate receptor antagonist naloxone 1 h before the rats were killed had no effect on the morphine-induced increases in the cord. Chromatographic analyses revealed that enzymatic processing of ΒE-related peptides in the spinal cord seemed unaffected by the morphine and/or naloxone treatments. In light of previous data showing that morphine down-regulates ΒE biosynthesis in the hypothalamus, the present results suggest that the regulation of ΒE-ir peptides in the spinal cord is distinct from that found in other CNS areas. These data provide support for previous results suggesting that ΒE-expressing neurons may be intrinsic to the spinal cord.en_US
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dc.format.extent3110 bytes
dc.format.mimetypeapplication/pdf
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dc.publisherBlackwell Publishing Ltden_US
dc.rights1993 International Society for Neurochemistryen_US
dc.subject.otherOpiateen_US
dc.subject.otherEndogenous Opioiden_US
dc.subject.otherProopiomelanocortinen_US
dc.subject.otherMorphineen_US
dc.subject.otherNucleus Tractus Solitarius.en_US
dc.titleEffects of Chronic Morphine Treatment on Β-Endorphin-Related Peptides in the Caudal Medulla and Spinal Corden_US
dc.typeArticleen_US
dc.rights.robotsIndexNoFollowen_US
dc.subject.hlbsecondlevelNeurosciencesen_US
dc.subject.hlbtoplevelHealth Sciencesen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationum* Department ofAnesthesiology, University of Michigan, Ann Arbor, Michigan, U.S.A.en_US
dc.contributor.affiliationotherMental Health Research Instituteen_US
dc.identifier.pmid8492132en_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/65660/1/j.1471-4159.1993.tb03518.x.pdf
dc.identifier.doi10.1111/j.1471-4159.1993.tb03518.xen_US
dc.identifier.sourceJournal of Neurochemistryen_US
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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