Authors: A. Bourreille; M. Doubremelle; D. Raingeard de la Blétière; J.-P. Segain; C. Toquet; R. Buelow; J.-P. Galmiche

Source: Scandinavian Journal of Gastroenterology, Volume 38, Number 5, May 2003 , pp. 526-532(7)

Publisher: Informa Healthcare

Abstract:

Background: Tumour necrosis factor (TNF) plays a key role in the pathogenesis of Crohn disease (CD). RDP58 is a novel anti-inflammatory decapeptide which was developed using a novel rational design strategy. Recently, RDP58 has proved to be a potent inhibitor of TNF production at a post-transcriptional step. The aims of this study were to investigate the anti-inflammatory properties of RDP58 ex vivo in human CD and in vivo in an experimental model colitis. Methods: Biopsies and lamina propria mononuclear cells from inflamed colonic mucosa of 18 CD patients were cultured for 24 h in the presence or absence of RDP58. TNF was quantified in a bioassay; interferon (IFN)- and interleukin (IL)-1 levels were measured by enzyme-linked immunosorbent assays. Colitis was induced by intra-rectal administration of 2, 4, 6 trinitrobenzene sulphonic acid (TNBS) in rats. Inflammation was assessed following 7 days of oral therapy with RDP58 or vehicle alone. Results: RDP58 led to decreased TNF and IFN- (but not IL-1) production by biopsies and lamina propria mononuclear cells from CD patients. In rats with TNBS-induced colitis, oral RDP58 therapy reduced weight loss and diarrhoea and improved macroscopic and histological inflammation scores. Conclusions: Our results suggest that RDP58 may be an effective therapy for CD with the clinical advantage of an oral administration.

Keywords: Crohn disease; inflammation; inflammatory bowel disease; TNF; RDP58

Document Type: Research article

DOI: http://dx.doi.org/10.1080/00365520310002922

Publication date: 2003-05-01

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