当前位置： SCI文献检索 > BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS期刊下所有文献 > Gastric and thymic assay of acute oral treatment of rats with nitric oxide esters of ibuprofen or indomethacin.

Gastric and thymic assay of acute oral treatment of rats with nitric oxide esters of ibuprofen or indomethacin.

Abstract：

:Two common non-steroidal anti-inflammatory drugs (NSAIDs) and their nitric oxide (NO) adducts were evaluated for effects on stomach and thymus. Following 4-h duration (acute) oral dosing of fasted male Wistar rats, 1.33 x 10(-4)mol/kg of ibuprofen caused significant visual irritation score and microscopic thinning, although an ulceration assay proved insensitive. Ibuprofen esterified with NO abolished irritation and significantly reduced thinning. Gastro-protective effects of NO-linked ibuprofen were associated with higher levels of diaphorase by optical density, an enzymatic marker of local synthesis of nitric oxide. Both indomethacin and its congener at 2 x 10(-5)mol/kg produced microscopic signs of thinning only, not visible irritation or alteration of diaphorase staining. Results suggest that NO-linked ibuprofen can promote resistance to mucosal injury, possibly via local synthesis of NO. All NO-congeners and parent NSAIDs produced comparable reductions in the abundance of medullary nitrergic cells, those synthesising NO in thymus, without significantly lowering T-cellularity, the relative size of cortex wherein T-cells are produced. Findings indicate disturbance of T-cell tolerance, consistent with increased risk of autoimmune susceptibility.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Downing JE,Madden JC,Ingram MJ,Rostron C

doi

10.1016/j.bbrc.2005.06.149

subject

Has Abstract

pub_date

2005-08-26 00:00:00

pages

646-53

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)01384-7

journal_volume

334

pub_type

杂志文章

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