The T393C polymorphism of GNAS1 is a predictor for relapse and survival in resectable non-small cell lung cancer
Menée sur 163 patients atteints d'un cancer du poumon non à petites cellules traité par chirurgie entre 1998 et 2010, cette étude montre que le polymorphisme à simple nucléotide T393C du gène GNAS1 est associé au risque de récidive et à la survie des patients
Introduction The GNAS1 T393C single nucleotide polymorphism (T393C-SNP) correlates with Gαs mRNA stability and protein expression and augmented apoptosis. Genetic germ line variations as stable and reproducible markers potentially serve as prognostic marker in oncology. The aim of this study was to evaluate the potential prognostic value of T393C-SNP in complete resected non-small cell lung cancer (NSCLC). Patients and methods In total 163 Caucasian patients, who had been surgically treated for NSCLC between 1998 and 2010, were included in this study. Genotyping of peripheral blood cells was performed by polymerase chain reaction and digestion using the restriction enzyme FokI. The T393C-SNP was correlated with clinic-pathological parameters and survival. Chi-square test, Kaplan–Meier estimator and cox regression hazard model were used to assess the prognostic value of the T393C-SNP. Results C-allele carriers had a higher recurrence rate (p = 0.018) and a shorter disease-free survival compared to homozygous T-allele carriers (12.26 months vs. 44.65 months, p = 0.009). The overall survival in homozygous C allele carriers was shorter (19.10 months vs. 53.95 months, p = 0.019). Multivariate Cox regression identified the CC genotype as a negative independent prognostic factor for recurrence (hazard ratio 2.36, p = 0.007) and survival (hazard ratio 2.51, p = 0.008). Conclusion Determination of T393C-SNP preoperatively potentially allows allocation of NSCLC patients into different risk profiles and may influence the therapeutic strategy.
Lung Cancer , résumé, 2011