PubMed:22608953 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/22608953","sourcedb":"PubMed","sourceid":"22608953","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/22608953","text":"HSPB1 gene polymorphisms predict risk of mortality for US patients after radio(chemo)therapy for non-small cell lung cancer.\nPURPOSE: We investigated potential associations between single-nucleotide polymorphisms (SNPs) in the heat shock protein beta-1 (HSPB1) gene and overall survival in US patients with non-small cell lung cancer (NSCLC).\nMETHODS AND MATERIALS: Using available genomic DNA samples from 224 patients with NSCLC treated with definitive radio(chemo)therapy, we genotyped 2 SNPs of HSPB1 (NCBI SNP nos. rs2868370 and rs2868371). We used both Kaplan-Meier cumulative probability and Cox proportional hazards analyses to evaluate the effect of HSPB1 genotypes on survival.\nRESULTS: Our cohort consisted of 117 men and 107 women, mostly white (79.5%), with a median age of 70 years. The median radiation dose was 66 Gy (range, 63-87.5 Gy), and 183 patients (82%) received concurrent platinum-based chemotherapy. The most common genotype of the rs2868371 SNP was CC (61%). Univariate and multivariate analyses showed that this genotype was associated with poorer survival than CG and GG genotypes (univariate hazard ratio [HR] = 1.39, 95% confidence interval [CI], 1.02-1.90; P=.037; multivariate HR = 1.39; 95% CI, 1.01-1.92; P=.045).\nCONCLUSIONS: Our results showed that the CC genotype of HSPB1 rs2868371 was associated with poorer overall survival in patients with NSCLC after radio(chemo)therapy, findings that contradict those of a previous study of Chinese patients. Validation of our findings with larger numbers of similar patients is needed, as are mechanical and clinical studies to determine the mechanism underlying these 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