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Excretion of metabolites of prostacyclin and thromboxane by rats with nephrotoxic nephritis: effects of interleukin-1.

Abstract：

:1. To obtain direct evidence of abnormal eicosanoid biosynthesis in rats injected with anti-glomerular-basement-membrane antibodies (a-GBM), products derived from thromboxane A2 (TXA2) and prostacyclin (PGI2) were measured in 24 h urine collections before and after a-GBM. 2. Administration of a-GBM (9.5 mg) caused albuminuria, decreased creatinine clearance, increased numbers of intra-glomerular neutrophils and increased excretion of TXB2, 2,3-dinor-TXB2 (products of TXA2) and 6-oxo-PGF 1 alpha and 2,3-dinor-6-oxo-PGF 1 alpha (products of PGI2) at 24 h. 3. Interleukin-1 (IL-1 beta; 5 micrograms) alone caused an increase in PGI2 metabolite excretion but had no effect on TXA2 metabolites. It had no effect on creatinine clearance but increased numbers of glomerular neutrophils by approximately 4-5 fold compared to a-GBM. 4. Pretreatment of rats with IL-1 beta before a-GBM synergistically increased albumin excretion but only additively increased eicosanoid excretion. Numbers of intra-glomerular neutrophils and creatinine clearance were unchanged compared to IL-1 beta alone. 5. The cyclo-oxygenase inhibitor, ibuprofen (10 mgkg-1 i.p., twice daily for 4 days) inhibited both serum TXB2 production and urinary prostaglandin excretion. It also caused an almost complete attenuation of albumin excretion. Creatinine clearance and glomerular neutrophils remained unchanged after a-GBM/IL-1 beta. 6. We conclude that the 50% inhibition of thromboxane production induced by ibuprofen does not modify the fall in creatinine clearance of accumulation of neutrophils in the glomerulus caused by the a-GBM. This degree of inhibition of eicosanoid production was associated with a striking decrease in proteinuria, but this may reflect a haemodynamic rather than a disease modifying action.

journal_name

Br J Pharmacol

journal_title

British journal of pharmacology

authors

Ward PS,Fuller RW,Ritter JM,Cashman SJ,Rees AJ,Dollery CT

doi

10.1111/j.1476-5381.1991.tb09844.x

subject

Has Abstract

pub_date

1991-07-01 00:00:00

pages

1663-8

issue

3

eissn

0007-1188

issn

1476-5381

journal_volume

103

pub_type

杂志文章

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