Abstract | PURPOSE: EXPERIMENTAL DESIGN: Forty-three patients with metastatic colorectal adenocarcinoma were analyzed. All patients were treated with p.o. or i.v. fluoropyrimidine-based chemotherapy. A comprehensive chart examination was performed to determine tumor response rates. Genomic DNA was extracted from blood, and MTHFR genotypes were determined. RESULTS: At least one copy of the mutant valine allele was present in 26 patients (21 heterozygotes and 5 homozygotes). The remaining 17 patients carried only the alanine allele. Exploration of the relationship between MTHFR alleles and response rates revealed a statistically significant difference in the frequency of the valine allele among responders versus nonresponders (P = 0.0351). This observation was associated with an odds ratio of 2.86 (95% confidence interval 1.06-7.73) for a response in individuals with a valine allele. CONCLUSIONS: Our results show a link between the MTHFR polymorphism and tumor response to fluoropyrimidine-based chemotherapy and suggest that MTHFR genotyping may be of predictive benefit in selecting treatment regimens.
|
Authors | Victor Cohen, Valerie Panet-Raymond, Nelly Sabbaghian, Isabelle Morin, Gerald Batist, Rima Rozen |
Journal | Clinical cancer research : an official journal of the American Association for Cancer Research
(Clin Cancer Res)
Vol. 9
Issue 5
Pg. 1611-5
(May 2003)
ISSN: 1078-0432 [Print] United States |
PMID | 12738713
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Antineoplastic Agents
- DNA, Neoplasm
- Deoxycytidine
- Capecitabine
- Methylenetetrahydrofolate Reductase (NADPH2)
- Fluorouracil
|
Topics |
- Adenocarcinoma
(drug therapy, genetics, secondary)
- Adult
- Aged
- Alleles
- Antineoplastic Agents
(therapeutic use)
- Capecitabine
- Colorectal Neoplasms
(drug therapy, genetics)
- DNA, Neoplasm
(genetics)
- Deoxycytidine
(analogs & derivatives, therapeutic use)
- Female
- Fluorouracil
(therapeutic use)
- Genotype
- Humans
- Male
- Methylenetetrahydrofolate Reductase (NADPH2)
(genetics)
- Middle Aged
- Neoplasm Staging
- Polymorphism, Genetic
- Predictive Value of Tests
|