title: XRCC1 R399Q polymorphism is associated with response to platinum-based neoadjuvant chemotherapy in bulky cervical cancer.
abstract: OBJECTIVE
  The aim of the study was to assess whether the genetic polymorphisms were associated with the tumor response in patients treated with platinum-based neoadjuvant chemotherapy (NAC) for bulky cervical cancer.
  
  
  METHODS
  We retrospectively reviewed the clinical data and recruited paraffin-embedded, formalin-fixed tissues of 36 patients with bulky cervical carcinoma. All patients underwent two or three cycles of platinum-based NAC followed by radical hysterectomy. We determined the genotypes of each single nucleotide polymorphism (SNP) of ERCC1, ERCC2, GGH, GSTP1, MTHFR, SLC19A1 and XRCC1 using single base primer extension assay.
  
  
  RESULTS
  The response to platinum-based NAC was higher in patients with SNP of XRCC1 R399Q (P=0.015), and there was a significant increased chance of treatment response in women with the G/G genotype (OR 38.0; 95% CI 1.66-870.45; P=0.023). The probability of response was also higher in patients with SNP of SLC19A1 6318C/T (P=0.032). There were dose-dependent influence of the number of alleles on the response to platinum-based chemotherapy (chi2 test for linear-by-linear association; P=0.009 for XRCC1 R399Q and P=0.017 for SLC19A1 6318C/T, respectively). Moreover, the multifactor dimensionality reduction (MDR) analysis documented that the combinations of XRCC1 R399Q and GGH-401C/T genetic polymorphisms were significantly associated with response to chemotherapy (P<0.0001).
  
  
  CONCLUSIONS
  Genetic polymorphism of XRCC1 R399Q is associated with response to platinum-based NAC in bulky cervical cancer, and MDR analysis documented association between gene-gene interaction of XRCC1 R399Q and treatment response.
authors.affiliation: Department of Obstetrics and Gynecology, College of Medicine, Seoul National University, 28 Yongon-dong, Chongno-gu, Seoul 110-744, South Korea.
authors.forename: Hyun Hoon
authors.initials: HH
authors.lastname: Chung
authors.forename: Mi-Kyung
authors.initials: MK
authors.lastname: Kim
authors.forename: Jae Weon
authors.initials: JW
authors.lastname: Kim
authors.forename: Noh-Hyun
authors.initials: NH
authors.lastname: Park
authors.forename: Yong-Sang
authors.initials: YS
authors.lastname: Song
authors.forename: Soon-Beom
authors.initials: SB
authors.lastname: Kang
authors.forename: Hyo-Pyo
authors.initials: HP
authors.lastname: Lee
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage*; D016190:Carboplatin / Q000008:administration & dosage*; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology / Q000601:surgery; D002945:Cisplatin / Q000008:administration & dosage*; D017931:DNA Primers; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D006801:Humans; D007044:Hysterectomy; D007262:Infusions, Intravenous; D008875:Middle Aged; D020360:Neoadjuvant Therapy; D009367:Neoplasm Staging; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D012189:Retrospective Studies; D002583:Uterine Cervical Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology / Q000601:surgery; D000076105:X-ray Repair Cross Complementing Protein 1
chemical_list: D000970:Antineoplastic Agents; D017931:DNA Primers; D004268:DNA-Binding Proteins; D000076105:X-ray Repair Cross Complementing Protein 1; C000619371:XRCC1 protein, human; D016190:Carboplatin; D002945:Cisplatin