Nitric oxide is not involved in the initiation of insulin secretion from rat islets of Langerhans.

Abstract:

:The involvement of nitric oxide as an intracellular messenger in the control of insulin secretion from pancreatic Beta cells was studied in rat islets of Langerhans by measuring: (i) nitric oxide generation in response to physiological insulin secretagogues; (ii) the effects of inhibitors of nitric oxide synthesis on insulin secretory responses to physiological secretagogues, and on insulin synthesis; (iii) changes in islet cyclic guanosine monophosphate in response to secretagogues; (iv) the effects of exogenous cyclic guanosine monophosphate and dibutyryl cyclic guanosine monophosphate on insulin secretion from electrically permeabilised islets and from intact, respectively. These studies produced no evidence that nitric oxide generation is required for the initiation of insulin secretion by common secretagogues. However, the results of our experiments suggest that the generation of nitric oxide may be involved in long-term, glucose-dependent increases in cyclic guanosine monophosphate content of islet cells, although the physiological relevance of these changes requires further investigation.

journal_name

Diabetologia

journal_title

Diabetologia

authors

Jones PM,Persaud SJ,Bjaaland T,Pearson JD,Howell SL

doi

10.1007/BF02221676

subject

Has Abstract

pub_date

1992-11-01 00:00:00

pages

1020-7

issue

11

eissn

0012-186X

issn

1432-0428

journal_volume

35

pub_type

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