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Children’s International Polyposis (CHIP) study: a randomized, double-blind, placebo-controlled study of celecoxib in children with familial adenomatous polyposis

Authors Burke CA, Phillips R, Berger MF, Li C, Essex MN, Iorga D, Lynch PM

Received 8 September 2016

Accepted for publication 5 March 2017

Published 19 July 2017 Volume 2017:10 Pages 177—185


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Amy Norman

Peer reviewer comments 3

Editor who approved publication: Professor Andreas M Kaiser

Carol A Burke,1 Robin Phillips,2 Manuela F Berger,3 Chunming Li,3 Margaret Noyes Essex,4 Dinu Iorga,3 Patrick M Lynch5

1Department of Gastroenterology and Hepatology, Cleveland Clinic, Cleveland, OH, USA; 2Department of Surgery, St Mark’s Hospital and Academic Institute, Middlesex, UK; 3Global Clinical Affairs, 4Global Medical Affairs, Pfizer Inc., New York, NY, 5Department of Gastroenterology, Hepatology and Nutrition, The University of Texas MD Anderson Cancer Center, Houston, TX, USA

Objective: To evaluate the efficacy and safety of celecoxib versus placebo in the prevention and treatment of colorectal polyposis in children with familial adenomatous polyposis (FAP).
Methods: In this Phase III, double-blind, randomized, placebo-controlled, multicenter trial patients aged 10–17 years with FAP were randomized to celecoxib (16 mg/kg/day) or placebo for up to 5 years. Patients underwent annual assessments, including colonoscopies, to detect the time from randomization to the earliest occurrence of ≥20 polyps (>2 mm in size) or colorectal malignancy. The study was terminated early due to low rate of observed endpoints combined with a lower than expected enrollment rate. Descriptive results are provided.
Results: Of 106 randomized patients, 55 were treated with celecoxib (mean age 12.6 years; 52.7% female) and 51 were given placebo (mean age 12.2 years; 54.9% female). Disease progression (≥20 polyps, >2 mm in size) was observed in seven (12.7%) and 13 (25.5%) patients, respectively. The median time to disease progression was 2.1 years in the celecoxib group and 1.1 years for placebo. No patient developed colorectal cancer. The rate of adverse events (AEs) was similar in both groups (75.5% and 72.9%, respectively). Three patients in the celecoxib group (none in the placebo group) experienced serious AEs.
Conclusion: In children with FAP, celecoxib was a well-tolerated treatment that was associated with a lower rate of colorectal polyposis and a longer time to disease progression compared with placebo. Due to the low rate of observed endpoints, the long-term impact of these results could not be ascertained.

Keywords: chemoprevention, clinical trial, adenoma, colorectal

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