Document Detail


Purinergic receptors involved in the stimulation of insulin and glucagon secretion.
MedLine Citation:
PMID:  3042486     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The study of purinergic receptors in the endocrine pancreas is a recent field of investigations. Until recently, ATP has been considered only as an intracellular fuel by most authors. Nevertheless for some years evidence has been obtained that extracellular ATP and/or ADP could act on the B cell membrane to increase insulin secretion. Furthermore it was shown that adenosine could act on the A cell surface to increase glucagon secretion. In both cases the involvement of purinoceptors could be demonstrated using structural analogues which are metabolically stable and not taken up by cells. Also the effects of activators of purinoceptors on B and A cells were suppressed by antagonists. So, it was possible to establish that the purinoceptors involved in the stimulation of insulin and glucagon secretion were different. The B cell is endowed with P2 purinoceptors (for ATP and/or ADP) and the A cell possess P1 purinoceptors (for adenosine). It is of interest to note that B and A cells, which secrete hormones with opposite roles, anabolic and catabolic respectively, have two different types of purinoceptors involved in stimulatory process. The purinergic modulation of B and A cells appears to be of physiological relevance.
Authors:
M M Loubatieres-Mariani; J Chapal
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Diabète & métabolisme     Volume:  14     ISSN:  0338-1684     ISO Abbreviation:  Diabete Metab     Publication Date:    1988 Mar-Apr
Date Detail:
Created Date:  1988-09-15     Completed Date:  1988-09-15     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  7604157     Medline TA:  Diabete Metab     Country:  FRANCE    
Other Details:
Languages:  eng     Pagination:  119-26     Citation Subset:  IM    
Affiliation:
Faculté de Médecine, Laboratoire de Pharmacologie, CNRS UA 599, Institut de Biologie, Montpellier.
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MeSH Terms
Descriptor/Qualifier:
Animals
Glucagon / secretion*
Insulin / secretion*
Islets of Langerhans / secretion*
Models, Biological
Receptors, Purinergic / physiology*
Chemical
Reg. No./Substance:
0/Receptors, Purinergic; 11061-68-0/Insulin; 9007-92-5/Glucagon

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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