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- W2890733735 abstract "e15151 Background: We examined whether 133 germline polymorphisms (SNPs) in 15 candidate genes (CSF1R, IL8RA, TLR4, IL10, IL10RA, CTLA4, IL2, IL2RA, TGF b1, ICOS, IL13, IL13RA2, IFNgR, IL15 and IL15RA) would predict clinical outcome in the ACCORD-12 phase III trial which randomly compared neoadjuvant radiotherapy (RT) plus capecitabine (CAP45) with dose-intensified RT plus capecitabine and oxaliplatin (CAPOX50) in T3-4 Nx M0 resectable rectal cancer. Methods: A candidate-gene association study was conducted in 316 patients (n = 161 in the CAPOX50 and n = 155 in the CAP45 arm). The primary end-point was tumor response according to the Dworak score in each arm. Logistic regressions were used to assess univariate/multivariate associations. The Storey and Tibshirani method based on the control of false discovery rate was used ( q-value < 0.10 (adjusted p-value) considered as true discovery). Multivariate models adjusted on treatment arm and T stage were performed to determine prognostic and predictive values of SNPs for tumor response. Results: In univariate analysis, two SNPs in IL2RA (rs11256456: OR = 5.1 [2.38; 11] and rs706781: OR = 4.2 [1.98 ; 8.74]) were significantly associated with the Dworak score in the CAP45 arm, and one in IL2RA the CAPOX50 arm (rs2104286: OR = 0.11 [0.01 ; 0.90]. All were confirmed in the multivariate analysis. A significant haplotypic effect was observed in the CAP-45 arm (p = 0.0001). Interaction was significant for IL2RA rs11256456 ( p= 0.03) and rs706781 ( p= 0.002) and no significant for IL2RA rs2104286 ( p= 0.722), suggesting a predictive deleterious effect the first two ones for response to oxaliplatin-based chemoRT, and a prognostic effect of the third one for response to chemoRT (+/- oxaliplatin). None of the three IL2RA SNPs were correlated with survival in the multivariate analysis. Conclusions: This pharmacogenetic analysis shows that SNPs in IL2RA have a significant association with response to chemoRT with capecitabine in patients with locally advanced rectal cancer. Their predictive effect may identify patients in whom oxaliplatin addition to chemoRT is deleterious." @default.
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- W2890733735 date "2017-05-20" @default.
- W2890733735 modified "2023-10-18" @default.
- W2890733735 title "Impact of Immune response-associated gene polymorphisms on tumor response in rectal cancer patients treated with capecitabine +/- oxaliplatine and radiation in the ACCORD-12/PRODIGE-2 phase III trial." @default.
- W2890733735 doi "https://doi.org/10.1200/jco.2017.35.15_suppl.e15151" @default.
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