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Celecoxib in Preventing Colorectal Cancer in Young Patients With a Genetic Predisposition for Familial Adenomatous Polyposis

Phase I Pilot Toxicity/Methods Validation Study of Celecoxib in Genotype-Positive Children With Familial Adenomatous Polyposis

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00685568
Enrollment
22
Registered
2008-05-28
Start date
2002-11-21
Completion date
2006-04-21
Last updated
2018-11-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colorectal Cancer, Precancerous Condition

Keywords

colon cancer, rectal cancer, familial adenomatous polyposis

Brief summary

RATIONALE: Chemoprevention is the use of certain drugs to keep cancer from forming. The use of celecoxib may keep polyps and colorectal cancer from forming in patients with familial adenomatous polyposis. PURPOSE: This randomized phase I trial is studying the side effects and best dose of celecoxib in treating young patients with a genetic predisposition for familial adenomatous polyposis.

Detailed description

OBJECTIVES: Primary * Determine the safety and toxicity of celecoxib in pediatric patients with genotype-positive familial adenomatous polyposis. Secondary * Determine the aberrant crypt foci (ACF) and adenoma burden in the entire colorectum of these patients. * Eliminate the learning curve in a phase II/III trial (reproducibility of endoscopic techniques, tolerability of procedure). * Compare sedation strategies based on local standards (monitored anesthesia care vs conscious sedation). * Validate the ACF scoring technique. * Establish the short-term (3 month) impact of celecoxib on ACF count in order to determine appropriateness of ACF as a pathologic endpoint in a phase II/III trial. OUTLINE: This is a multicenter study. Patients are randomized to 1 of 2 treatment arms. * Arm I: Patients receive oral celecoxib twice daily for 3 months in the absence of disease progression or unacceptable toxicity. * Arm II: Patients receive oral placebo twice daily for 3 months in the absence of disease progression or unacceptable toxicity. Patients undergo colonoscopy at baseline and at 3 months. Patients also complete psychosocial questionnaires at baseline. Blood samples are collected at baseline to assess the influence of polymorphisms (CYP2C9, uridine diphosphate (UDP)-glucuronosyl transferase, A6, glutathione S-transferase \[GST\] M1, and Glutathione S-transferase (GST) theta 1 (GSTT1)) on age of onset of phenotype or number of colorectal polyps. Plasma drug trough levels are assessed at baseline, 1 month, and 3 months. After completion of study treatment, patients are followed periodically for up to 2 months.

Interventions

DRUGcelecoxib

Orally, twice daily for 3 months; 50 mg tablets. Celecoxib escalating doses starting at 4 mg/kg/day.

OTHERplacebo

Orally, twice daily for 3 months

Sponsors

National Cancer Institute (NCI)
CollaboratorNIH
M.D. Anderson Cancer Center
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Caregiver)

Eligibility

Sex/Gender
ALL
Age
10 Years to 14 Years
Healthy volunteers
No

Inclusion criteria

DISEASE CHARACTERISTICS: * Diagnosis of familial adenomatous polyposis (FAP) based on genetic predisposition testing * Genotype-positive FAP (pathologic Adenomatous polyposis coli (APC) mutation) * No attenuated FAP genotype, defined by any of the following: * Mutation at the 5' end of APC and exon 4 * Exon 9-associated phenotypes * 3' region mutations * Has an intact colon * No requirement for colectomy * Parent(s) do not desire colectomy (regardless of adenoma burden) * Colorectal adenoma burden as assessed by baseline colonoscopy * No diagnosis of severe dysplasia or greater * No more than 10 adenomas ≥ 1 cm * No more than 100 adenomas of any size * No evidence of anemia (hematocrit \< 33%) * No new diagnosis of carcinoma PATIENT CHARACTERISTICS: * White Blood Count (WBC) \> 3,000/μL * Platelet count \> 100,000/μL * Hemoglobin \> 10.0 g/dL * Aspartate aminotransferase/alanine aminotransferase (AST/ALT) \< 1.5 times upper limit of normal (ULN) * Alkaline phosphatase \< 1.5 times ULN * Total bilirubin \< 1.5 times ULN * Creatinine \< 1.5 times ULN * Not pregnant or nursing * Negative pregnancy test * Fertile patients must use effective contraception * No history of hypersensitivity to COX-2 inhibitors, sulfonamides, NSAIDs, or salicylates * No history of peptic ulcer disease * No significant medical or psychiatric problem that, in the opinion of the principal investigator, would make the patient a poor candidate for the study * No other unacceptable clinical risk (e.g., previously unknown bleeding diatheses) * No invasive carcinoma within the past 5 years PRIOR CONCURRENT THERAPY: * More than 3 months since prior investigational agent * More than 6 months since prior chemotherapy * No prior radiotherapy to the pelvis * At least 3 months since prior NSAIDs (at any dose) at a frequency of ≥ 3 times/week * At least 1 month since prior NSAIDs (at any dose) at a frequency of \< 3 times/week * At least 1 month since prior nasal steroids * Concurrent Nonsteroidal Antiinflammatory Drugs (NSAIDs) allowed provided they are administered ≤ 5 times per month * Concurrent orally inhaled steroids allowed provided they are administered for ≤ 4 weeks over a 6-month period * Concurrent oral or intravenous (IV) corticosteroids allowed provided they are administered for ≤ 2 consecutive weeks over a 6-month period * Concurrent proton pump inhibitors to treat gastric reflux allowed * No concurrent nasal steroids except mometasone (Nasonex) * No concurrent fluconazole, lithium, or adrenocorticosteroids

Design outcomes

Primary

MeasureTime frame
Toxicity3 months

Secondary

MeasureTime frame
Elimination of the learning curve in a phase II/III trial3 months
Comparison of sedation strategies based on local standards3 months
Validation of technique for scoring ACFs3 months
Short-term (3 month) impact of celecoxib on ACF count3 months
Aberrant crypt foci (ACF) and adenoma burden in the entire colorectum3 months
Influence of polymorphisms on age of onset of phenotype or on the number of colorectal polyps3 months
Feasibility of psychosocial questionnaires3 months
Pharmacokinetics (plasma drug trough concentrations)3 months
Adherence3 months

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026