Abstract.
Objective and design: RDP58 is a novel anti-inflammatory peptide that inhibits TNF synthesis and upregulates heme oxygenase-1. RDP58 therapy was evaluated in the dextran sodium sulphate (DSS) model of chronic colitis.¶Material: Colitis was induced by giving DSS to mice (n = 8 animals/group). Toxicity studies were done in Rhesus monkeys (n = 5), dogs (n = 3) and mice (n = 10).¶Treatment: In colitis, mice were treated with p.o. vehicle (saline), RDP58 (5 and 10 mg/kg/day) or 5-ASA (50 mg/kg/day).¶Methods: Disease activity index (DAI) was used as the endpoint of efficacy.¶Results: RDP58 therapy significantly reduced DAI and histological scores in all animals. DAI scores in RDP58 treated animals declined faster than 5-ASA. RDP58 at 5 or 10 mg/kg/day significantly reduced DAI compared to 5-ASA. RDP58 significantly reduced acute, chronic and total inflammation scores. It enhanced re-epithelialization by reducing crypt scores. RDP58 was not bioavailable and was well tolerated.¶Conclusions: Therapeutic efficacy of RDP58 combined with a lack of bioavailibility and toxicity suggest that RDP58 may be a promising new therapeutic for IBD.
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Received 20 February 2002; returned for revision 28 June 2002; accepted by G. Letts 6 July 2002
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ID="*"Correspondence to: S. Murthy
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Murthy, S., Flanigan, A., Coppola, D. et al. RDP58, a locally active TNF inhibitor, is effective in the dextran sulphate mouse model of chronic colitis. Inflamm. res. 51, 522–531 (2002). https://doi.org/10.1007/PL00012423
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DOI: https://doi.org/10.1007/PL00012423