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    Br J Cancer. 2009 Jul 21;101(2):357-62. Epub 2009 Jun 16.

    Explorative study to identify novel candidate genes related to oxaliplatin efficacy and toxicity using a DNA repair array.

    Kweekel DM, Antonini NF, Nortier JW, Punt CJ, Gelderblom H, Guchelaar HJ.

    Source

    Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, The Netherlands. d.m.kweekel@lumc.nl

    Abstract

    PURPOSE:

    To identify new polymorphisms (single nucleotide polymorphisms, SNPs) in DNA repair pathways that are associated with efficacy and toxicity in patients receiving oxaliplatin and capecitabine for advanced colorectal cancer (ACC).

    METHODS:

    We studied progression-free survival (PFS) in 91 ACC patients, of whom germ-line DNA was isolated and genotyped using an Asper Biotech array. Overall survival (OS) and toxicity were studied as secondary end points. A step-wise selection of SNPs was performed, involving univariate and multivariate log-rank tests and Cox regression analysis, with age and performance status as covariates.

    RESULTS:

    A total of 81 SNPs in 46 genes on the array were selected for further analysis, based on genotyping success rates and minor allele frequencies. After step-wise selection, we found that homozygosity for the ataxia telangiectasia mutated gene (ATM) rs1801516 or excision repair cross-complementing gene (ERCC5) rs1047768 SNPs was associated with shorter PFS; however there were no significant associations (P>0.01) with OS or toxicity.

    DISCUSSION:

    This is the first study describing the pathway gene approach for the selection of new candidate genes involved in oxaliplatin efficacy and toxicity. The results suggest that the ATM and ERCC5 genes may be associated with oxaliplatin efficacy in ACC.

    Comment in

    PMID:
    19536092
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2720215
    Free PMC Article

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