creators_name: Kristal, Mark B.
creators_name: Tarapacki, J. A.
creators_name: Barton, Debra
creators_id: kristal@buffalo.edu
type: journalp
datestamp: 2008-11-02 10:00:23
lastmod: 2011-03-11 08:57:13
metadata_visibility: show
title: Amniotic Fluid Ingestion Enhances
Opioid-Mediated But Not
Nonopioid-Mediated Analgesia
ispublished: pub
subjects: psy-bio
subjects: physio-psy
subjects: behav-neuro-sci
subjects: neuro-chem
full_text_status: public
keywords: Amniotic fluid, Opioids, Analgesia, Aspirin, Rats, Morphine, Pain, Parturition, POEF, Formalin test, Placentophagia
abstract: Ingestion of amniotic fluid or placenta by rats has been shown to enhance several types of opioid-mediated analgesia: that induced by morphine, footshock, vaginal/cervical stimulation, and late pregnancy. This enhancement has also been blocked by administration of opioid antagonists. The present study was designed to examine further the specificity of the enhancement effect for opioid-mediated analgesia by testing for enhancement following administration of aspirin, a nonopioid analgesic. The formalin test was used as the pain threshold assay. Amniotic fluid or beef bouillon was administered by orogastric tube to rats that were treated either with morphine sulfate or saline. or pretreated with naltrexone, then treated with aspirin or vehicle. Both morphine and aspirin treatments produced analgesia. Amniotic fluid significantly enhanced the analgesia produced by morphine, but did not enhance the analgesia produced by aspirin, further suggesting that the enhancing effect of amniotic fluid ingestion is specific for opioid-mediated analgesia, such as that existing at the start of parturition.
date: 1990
date_type: published
publication: Physiology & Behavior
volume: 47
number: 1
publisher: Pergamon Press
pagerange: 79-81
refereed: TRUE
citation:   Kristal, Dr. Mark B. and Tarapacki, J. A. and Barton, Debra  (1990) Amniotic Fluid Ingestion Enhances Opioid-Mediated But Not Nonopioid-Mediated Analgesia.  [Journal (Paginated)]     
document_url: http://cogprints.org/6249/1/nonopioid.pdf