Publication Date:
1981-06-05
Description:
Methionine enkephalin release was evoked by depolarization of slices from rat striatum with potassium. In the presence of 0.1 microM thiorphan [(N(R,S)-3-mercapto-2-benzylpropionyl)glycine], a potent inhibitor of enkephalin dipeptidyl carboxypeptidase (enkephalinase), the recovery of the pentapeptide in the incubation medium was increased by about 100 percent. A similar effect was observed with the dipeptide phenylalanylalanine, a selective although less potent enkephalinase inhibitor. Inhibition of other known enkephalin-hydrolyzing enzymes--aminopeptidase by 0.1 mM puromycin or angiotensin-converting enzyme by 1 microM captopril--did not significantly enhance the recovery of released methionine enkephalin. These data indicate that enkephalinase is critically involved in the inactivation of the endogenous opioid peptide released from striatal neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patey, G -- De La Baume, S -- Schwartz, J C -- Gros, C -- Roques, B -- Fournie-Zaluski, M C -- Soroca-Lucas, E -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1153-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7015510" target="_blank"〉PubMed〈/a〉
Keywords:
Amino Acids, Sulfur/*pharmacology
;
Animals
;
Corpus Striatum/drug effects/*metabolism
;
Endorphins/*secretion
;
Enkephalin, Methionine
;
Enkephalins/antagonists & inhibitors/*secretion
;
Mice
;
Neprilysin
;
Potassium/pharmacology
;
*Protease Inhibitors/*pharmacology
;
Rats
;
Thiorphan
;
Tiopronin/analogs & derivatives/*pharmacology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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