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Background

Small-cell lung cancer (SCLC) carries the worst prognosis among lung cancer diagnoses. Combined radiation and chemotherapy is the standard of care; however, treatment outcomes vary. Variability in the rate at which chemotherapy agents are metabolized and in the capacity of repairing DNA damage has been hypothesized to be partly responsible for the treatment response variation. Genes in the glutathione metabolism and DNA repair pathways were tested through tag single-nucleotide polymorphisms (SNPs) to assess their association with survival in SCLC.

Patients and methods

Blood DNA from 248 patients with primary SCLC was genotyped for 419 tag SNPs from 49 genes in the glutathione and DNA repair pathways. Association analyses with patient survival were carried out at single-SNP, whole-gene, and haplotype levels after adjusting for age, gender, tumor stage, treatment modalities, and smoking history.

Results

Among the 375 SNPs successfully genotyped, 21 SNPs, located on 11 genes, showed significant association with survival. Whole-gene analyses confirmed 3 of the 11 genes: GSS, ABCC2, and XRCC1. Haplotype analyses of these three genes identified haplotype combinations and genomic locations underlying the observed SNP associations.

Conclusion

Genetic variations in genes involved in the glutathione and DNA repair pathways are associated with SCLC survival."xsd:string
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http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Chen J."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Liu Y."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Sun Z."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Yang P."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Jiang R."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Cunningham J.M."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Pankratz V.S."xsd:string
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http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Aakre J."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Garces Y.Y."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/author"Idowu O."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/date"2010"xsd:gYear
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/name"Ann Oncol"xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/pages"2011-2016"xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/title"Genetic variation in glutathione metabolism and DNA repair genes predicts survival of small-cell lung cancer patients."xsd:string
http://purl.uniprot.org/citations/20439344http://purl.uniprot.org/core/volume"21"xsd:string
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