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Original Article
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Volume 350:876-885 February 26, 2004 Number 9
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Infliximab Maintenance Therapy for Fistulizing Crohn's Disease
Bruce E. Sands, M.D., Frank H. Anderson, M.D., Charles N. Bernstein, M.D., William Y. Chey, M.D., D.Sc., Brian G. Feagan, M.D., Richard N. Fedorak, M.D., Michael A. Kamm, M.D., Joshua R. Korzenik, M.D., Bret A. Lashner, M.D., Jane E. Onken, M.D., Daniel Rachmilewitz, M.D., Paul Rutgeerts, M.D., Ph.D., Gary Wild, M.D., Ph.D., Douglas C. Wolf, M.D., Paul A. Marsters, M.S., Suzanne B. Travers, M.D., Marion A. Blank, Ph.D., and Sander J. van Deventer, M.D., Ph.D.

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ABSTRACT

Background Infliximab, a monoclonal antibody against tumor necrosis factor, is an effective maintenance therapy for patients with Crohn's disease without fistulas. It is not known whether infliximab is an effective maintenance therapy for patients with fistulas.

Methods We performed a multicenter, double-blind, randomized, placebo-controlled trial to evaluate the efficacy of infliximab maintenance therapy in 306 adult patients with Crohn's disease and one or more draining abdominal or perianal fistulas of at least three months' duration. Patients received 5 mg of infliximab per kilogram of body weight intravenously on weeks 0, 2, and 6. A total of 195 patients who had a response at weeks 10 and 14 and 87 patients who had no response were then randomly assigned to receive placebo or 5 mg of infliximab per kilogram every eight weeks and to be followed to week 54. The primary analysis was the time to the loss of response among patients who had a response at week 14 and underwent randomization.

Results The time to loss of response was significantly longer for patients who received infliximab maintenance therapy than for those who received placebo maintenance (more than 40 weeks vs. 14 weeks, P<0.001). At week 54, 19 percent of patients in the placebo maintenance group had a complete absence of draining fistulas, as compared with 36 percent of patients in the infliximab maintenance group (P=0.009).

Conclusions Patients with fistulizing Crohn's disease who have a response to induction therapy with infliximab have an increased likelihood of a sustained response over a 54-week period if infliximab treatment is continued every 8 weeks.


Source Information

From the Gastrointestinal Unit, Massachusetts General Hospital, and Harvard Medical School, Boston (B.E.S.); Department of Medicine, Vancouver Hospital, Vancouver, B.C., Canada (F.H.A.); Section of Gastroenterology, Health Sciences Centre, University of Manitoba, Winnipeg, Canada (C.N.B.); Rochester Institute for Digestive Diseases and Sciences, Rochester, N.Y. (W.Y.C.); Robarts Research Institute, University of Western Ontario, London, Canada (B.G.F.); Division of Gastroenterology, University of Alberta, Edmonton, Canada (R.N.F.); Physiology Unit, St. Mark's Hospital, London, (M.A.K.); Division of Gastroenterology, Washington University School of Medicine, St. Louis (J.R.K.); Department of Gastroenterology, Center for Inflammatory Bowel Disease, Cleveland Clinic Foundation, Cleveland (B.A.L.); Department of Gastroenterology, Duke University Medical Center, Durham, N.C. (J.E.O.); Division of Medicine, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel (D.R.); Division of Gastroenterology, University Hospital Leuven, Leuven, Belgium (P.R.); Division of Gastroenterology, Montreal General Hospital, Montreal (G.W.); Atlanta Gastroenterology Associates, Atlanta (D.C.W.); Centocor, Malvern, Pa. (P.A.M., S.B.T., M.A.B.); and Afdeling Gastroenterologie, Academisch Medisch Centrum, Amsterdam (S.J.D.).

Address reprint requests to Dr. Sands at the Gastrointestinal Unit, Massachusetts General Hospital, 55 Fruit St., GRJ 7, Boston, MA 02114.

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