title: No association between the Arg194Trp and Arg399Gln polymorphisms of the XRCC1 gene and colorectal cancer risk and progression in a Polish population.
abstract: BACKGROUND
  The risk of sporadic colorectal cancer can be associated with environmental and lifestyle factors that may be sources of physical and chemical carcinogens, modulated by products of many low penetrance genes. Polymorphisms of DNA repair genes may influence variation in individual DNA repair capacity, which is crucial for preventing genomic instability, which, in turn, may be associated with risk of cancer. XRCC1 is an essential protein for the base excision repair pathway which primarily deals with DNA base modifications, arisen spontaneously or as a consequence of the action of environmental factors.
  
  
  OBJECTIVE
  To perform a case-control study and test the association between two polymorphisms in the XRCC1 gene: Arg194Trp and Arg399Gln and colorectal cancer risk and progression.
  
  
  METHODS
  Genotypes were determined in DNA from peripheral blood lymphocytes of 100 colorectal cancer patients and 100 age, sex and ethnic-matched cancer-free controls by PCR RFLP.
  
  
  RESULTS
  We found that both polymorphisms of the XRCC1 gene were not associated with risk and progession of colorectal cancer in a Polish population. Moreover, there was not such association form the Arg194Trp/Arg399Gln haplotypes.
  
  
  CONCLUSIONS
  The Arg194Trp and Arg399Gln polymorphisms of the XRCC1 gene may not be associated with colorectal cancer in Polish population.
authors.affiliation: Department of Molecular Genetics, University of Lodz, Banacha, Lodz, Poland.
authors.forename: T
authors.initials: T
authors.lastname: Sliwinski
authors.forename: R
authors.initials: R
authors.lastname: Krupa
authors.forename: M
authors.initials: M
authors.lastname: Wisniewska-Jarosinska
authors.forename: J
authors.initials: J
authors.lastname: Lech
authors.forename: Z
authors.initials: Z
authors.lastname: Morawiec
authors.forename: J
authors.initials: J
authors.lastname: Chojnacki
authors.forename: J
authors.initials: J
authors.lastname: Blasiak
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D015179:Colorectal Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D004268:DNA-Binding Proteins / Q000235:genetics*; D018450:Disease Progression; D005260:Female; D006239:Haplotypes; D006801:Humans; D008297:Male; D008875:Middle Aged; D011044:Poland / Q000453:epidemiology; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D012307:Risk Factors; D044465:White People; D000076105:X-ray Repair Cross Complementing Protein 1
chemical_list: D004268:DNA-Binding Proteins; D000076105:X-ray Repair Cross Complementing Protein 1; C000619371:XRCC1 protein, human