Changes in arachidonic acid metabolite patterns in alloxan-induced diabetic rats.

Abstract:

:The vasodepressor responses to intravenous injections of arachidonic acid, and the formation of its metabolites, were studied in rats made diabetic 1 or 2 weeks after a 1-dose alloxan treatment. Arachidonic acid dose-dependently decreased the diastolic blood pressure in normal animals, but this hypotensive effect was significantly weaker in 2-week postalloxan-treated rats. Indometacin abolished arachidonic-acid-induced depressor responses in both normal and diabetic animals. Hypotension induced by sodium nitroprusside was of the same magnitude in non-diabetic and insulin deficient rats. Plasma levels of thromboxane B2 were significantly increased in both the 1- and 2-week diabetic rats, being greater in the latter group; those of 6-keto-PGF1 alpha remained unchanged during the 2-week diabetic period. It is concluded that the attenuation by diabetes of depressor responses to arachidonic acid could be due to changes in the thromboxane/prostacyclin balance, with thromboxane formation being elevated whereas prostacyclin generation remains unaffected.

journal_name

Pharmacology

journal_title

Pharmacology

authors

Hui SC,Ogle CW,Wang Z,An Y,Hu YH

doi

10.1159/000138612

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

291-8

issue

5

eissn

0031-7012

issn

1423-0313

journal_volume

39

pub_type

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