Journal
GASTROENTEROLOGY
Volume 119, Issue 6, Pages 1461-1472Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1053/gast.2000.20196
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Background & Aims: Interleukin (IL)-10 is a cytokine with potent anti-inflammatory properties. We investigated the safety and efficacy of different doses of human recombinant (rhu)IL-10 in patients with Crohn's disease (CD), Methods: A prospective, multicenter, double-blind, placebo-controlled study was conducted in 329 therapy-refractory patients with CD, Clinical improvement was defined by a reduction of the Crohn's Disease Activity Index (CDAI) by 100 points or move and clinical remission by a decrease of the CDAI to <150 points. At selected centers, patients underwent ileocolonoscopies and activation of the nuclear factor-KB (NF-KB) system was assessed in biopsy specimens. Results: Subcutaneous treatment with rhuIL-10 over 28 days induced a fully reversible, dose-dependent decrease in hemoglobin and thrombocyte counts but no clinically significant side effects. No differences in the induction of remission were observed between rhuIL-10 groups (1 g, 18% [9.6-29.2]; 4 mug, 20% [11.3-32.2]; 8 mug, 20% [11.1-31.8]; 20 mug, 28% [18-40.7]; and placebo, 18% [9.6-29.6]). Clinical improvement was observed in 46% (33.7-59) in the 8-mug/kg rhuIL-10 group in comparison with 27% (17-39.6) in patients taking placebo. Responders to rhulL-10 showed inhibition of NF-KB p65 activation in contrast to nonresponders, Conclusions: Up to 8 mug/kg of rhuIL-10 was well tolerated, A tendency toward clinical impvovement but not remission was observed in the 8-mug/kg dose group, Further studies should delineate which subgroups of patients with CD benefit from rhuIl-10 therapy.
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