title: Predictive effects of ERCC1 and XRCC3 SNP on efficacy of platinum-based chemotherapy in advanced NSCLC patients.
abstract: OBJECTIVE
  The purpose of the study was to investigate whether single-nucleotide polymorphisms of deoxyribonucleic acid repair gene excision repair cross-complementing group 1 at codon 118 and X-ray repair cross-complementing group 3 at codon 241 affected clinical outcomes in advanced non-small cell lung cancer patients receiving first-line platinum-based chemotherapy.
  
  
  METHODS
  A total of 130 patients treated with platinum-based doublets were examined for genotyping of excision repair cross-complementing group 1 118 and X-ray repair cross-complementing group 3 241 in peripheral blood lymphocytes with the method of the TaqMan assay plus the real-time polymerase chain reaction method. Multivariate logistic or Cox's regression analyses were used to adjust for possible confounding variables.
  
  
  RESULTS
  There were no differences in clinical characteristics among the different single-nucleotide polymorphisms. Overall response rate in the 130 patients was 20% with 85.4% of disease control rate. Followed up to 31 March 2008, there were 47 patients still alive. Overall survival was 15 months. No relationship was found between excision repair cross-complementing group 1 or X-ray repair cross-complementing group 3 single-nucleotide polymorphisms and tumor response to platinum-based chemotherapy. A significant correlation was found between excision repair cross-complementing group 1 118 C/T single-nucleotide polymorphisms and survival (P = 0.003). In the multivariate model, the survival was highly related with excision repair cross-complementing group 1 118 C/T or T/T genotypes and tumor response to chemotherapy.
  
  
  CONCLUSIONS
  Overall survival was significantly improved in the patients with excision repair cross-complementing group 1 118 T/T or C/T treated by platinum-based chemotherapy.
authors.affiliation: Medical Oncology Department, Tongji University Affiliated Shanghai Pulmonary Hospital and Tongji University Medical School Cancer Institute, No 507, Zhengmin Road, Shanghai 200433, People's Republic of China. caicunzhou@yahoo.com.cn
authors.forename: Caicun
authors.initials: C
authors.lastname: Zhou
authors.forename: Shengxiang
authors.initials: S
authors.lastname: Ren
authors.forename: Songwen
authors.initials: S
authors.lastname: Zhou
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Cunxia
authors.initials: C
authors.lastname: Su
authors.forename: Zengli
authors.initials: Z
authors.lastname: Zhang
authors.forename: Qinfang
authors.initials: Q
authors.lastname: Deng
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D001483:Base Sequence; D016190:Carboplatin / Q000008:administration & dosage; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology; D002945:Cisplatin / Q000008:administration & dosage; D004268:DNA-Binding Proteins / Q000235:genetics*; D004720:Endonucleases / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D053208:Kaplan-Meier Estimate; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D020641:Polymorphism, Single Nucleotide; D011379:Prognosis; D012044:Regression Analysis; D016896:Treatment Outcome
chemical_list: D004268:DNA-Binding Proteins; C110901:X-ray repair cross complementing protein 3; D016190:Carboplatin; C071447:ERCC1 protein, human; D004720:Endonucleases; D002945:Cisplatin