Retraction Note to: Correlation between PARP-1 Val762Ala polymorphism and the risk of lung cancer in a Chinese population.

Abstract

The aim of this study was to investigate the relationship of the PARP-1 Val762Ala (rs1136410 T>C) polymorphism and the risk of lung cancer. A population-based case–control study of 373 lung cancer patients and 360 healthy control subjects (individually matched on age and gender) in a Chinese population was conducted. Genomic DNA was extracted by the phenol-chloroform method from the peripheral blood. PARP-1 Val762Ala polymorphism was identified using polymerase chain reaction–restriction fragments length polymorphism technique. After adjusting for age, tobacco smoking, gender, smoking index, and drinking status, logistic regression analysis demonstrated that CC genotype in PARP-1 Val762Ala polymorphism had an increased risk of lung cancer compared with TT genotype (OR = 1.59, 95 % CI = 1.03 ~ 2.50, P = 0.048), a statistically difference that still existed when merging CC and TC genotypes (OR = 1.56, 95 % CI = 1.03 ~ 2.44, P = 0.042). However, no obvious difference was found between TT and TC (OR = 1.54, 95 % CI = 0.96 ~ 2.44, P = 0.073). Subgroup analysis by histological type indicated that adenocarcinoma patients had higher frequencies of CC or TC+CC genotypes than healthy controls (CC: OR = 1.85, 95 % CI = 1.12 ~ 3.03, P = 0.015; TC+CC: OR = 1.67, 95 % CI = 1.06 ~ 2.63, P = 0.027, respectively), but no statistically significant difference within each genotype in squamous cell carcinoma or small cell lung cancer (all P > 0.05). Our findings support the view that PARP-1 Val762Ala polymorphism may contribute to an increased risk of lung cancer in the Chinese population, especially for adenocarcinoma.