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The effect of nitric oxide donors on insulin secretion, cyclic GMP and cyclic AMP in rat islets of Langerhans and the insulin-secreting cell lines HIT-T15 and RINm5F.

Abstract：

:The aim of this study was to investigate whether short-term treatment with nitric oxide donors could mimic cytokine inhibition of insulin secretion. We tested the nitric oxide generating compounds 3-morpholinosydnonimine (SIN-1), S-nitroso-N-penicillamine (SNAP), S-nitrosoglutathione and hydroxylamine for their ability to inhibit insulin secretion, raise cyclic GMP and lower cyclic AMP levels in isolated rat islets of Langerhans and the insulin-secreting cell lines HIT-T15 and RINm5F. In islets, all nitric oxide donors inhibited glucose-induced insulin secretion and raised cyclic GMP levels. SIN-1 and S-nitrosoglutathione also reduced cyclic AMP, while SNAP and hydroxylamine had no effect. Insulin secretion in HIT-T15 cells was inhibited by SIN-1, SNAP and hydroxylamine and in RINm5F cells by hydroxylamine. Inhibition of HIT-T15 and RINm5F cell insulin secretion was not accompanied by an increase in cyclic GMP levels. The degree of inhibition of insulin secretion was unrelated to the extent of release of nitric oxide by the compounds as measured by nitrite and nitrate production. More effective inhibition by S-nitrosoglutathione and hydroxylamine versus SIN-1 and SNAP may be related to intracellular versus extracellular site of nitric oxide generation.

journal_name

Mol Cell Endocrinol

journal_title

Molecular and cellular endocrinology

authors

Cunningham JM,Mabley JG,Delaney CA,Green IC

doi

10.1016/0303-7207(94)90093-0

subject

Has Abstract

pub_date

1994-06-01 00:00:00

pages

23-9

issue

1-2

eissn

0303-7207

issn

1872-8057

pii

0303-7207(94)90093-0

journal_volume

102

pub_type

杂志文章

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