Inhibition of neutrophil elastase prevents the development of murine dextran sulfate sodium-induced colitis.

Abstract:

BACKGROUND:Neutrophil elastase (NE) is a major secretory product from activated neutrophils and a major contributor to tissue destruction. However, little is known about the pathogenic contribution of NE to ulcerative colitis (UC). This study was designed to investigate the contribution of NE by measuring NE activity in plasma and colonic mucosal tissue from UC patients and a murine acute colitis model, and to elucidate the therapeutic effect of the NE-specific inhibitor ONO-5046. METHODS:The NE enzyme activities in plasma and colonic mucosal tissue from UC patients were directly measured using an enzyme-substrate reaction. Acute colitis was induced in mice by administration of 1.5% dextran sulfate sodium (DSS) for 5 days. DSS-induced colitis mice were then treated with ONO-5046 (50 mg/kg body weight) intraperitoneally twice a day. RESULTS:In UC patients, the NE enzyme activity was significantly elevated in both the plasma and colonic mucosal tissue compared with healthy controls. In DSS-induced colitis mice, the NE enzyme activity increased in parallel with the disease development. ONO-5046 showed therapeutic effects in DSS-treated mice by significantly reducing weight loss and histological score. ONO-5046 suppressed the NE enzyme activities in both plasma and culture supernatant of colonic mucosa from DSS-induced colitis mice. CONCLUSIONS:ONO-5046, a specific NE inhibitor, prevented the development of DSS-induced colitis in mice. NE therefore represents a promising target for the treatment of UC patients.

journal_name

J Gastroenterol

authors

Morohoshi Y,Matsuoka K,Chinen H,Kamada N,Sato T,Hisamatsu T,Okamoto S,Inoue N,Takaishi H,Ogata H,Iwao Y,Hibi T

doi

10.1007/s00535-005-1768-8

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

318-24

issue

4

eissn

0944-1174

issn

1435-5922

journal_volume

41

pub_type

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