Abstract
This study aims to examine the correlation between two single nucleotide polymorphisms (SNPs) of apoptosis-related genes and clinical outcomes in gastric cancer. A total of 221 patients with stage T2 and T3 gastric cancer treated with postoperative chemotherapy between 2003 and 2008 were retrospectively collected in this study to explore the association of rs4645878 located in BAX gene and rs1801270 located in CDKN1A gene with survival, recurrence, and toxicity to chemotherapy. Additionally, immunohistochemistry was used to detect the BAX expression in gastric cancer tissues. Patients carrying at least one variant genotype in BAX SNP (rs4645878) showed a significantly increased recurrence risk [hazard ratio (HR) 2.63; 95 % confidence internal (95 % CI) 1.71–4.03] and poor survival (HR 2.89; 95 % CI 1.88–4.44). Moreover, the recurrence and survival rate in patients with GA genotype was 72.7 and 24.7 %, respectively, compared with total recurrence rate of 54.8 %, P = 0.006, and compared with total survival rate of 46.6 %, P = 0.001. In addition, the GA genotype was related to lower BAX expression in gastric cancer tissues. The CDKN1A (rs1801270) mutant genotype was associated with a significantly decreased risk of hematologic toxicity [odds ratio (OR) 0.28; 95 % CI 0.12–0.63]. SNPs located in BAX and CDKN1A genes are closely associated with clinical outcomes in patients with gastric cancer.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. 81372788), the Medical Scientific Research Key Foundation of Nanjing Command (No. 11Z032), and the Natural Science Foundation of Fujian Province Grant (No. 2014J01427) for Qiaojia Huang, and the Medical Scientific Innovation Foundation of Nanjing Command (No. MS122) for Yinghao Yu.
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Xiaoting Wang and Youdong Lin have contributed equally to this paper.
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Wang, X., Lin, Y., Lan, F. et al. BAX and CDKN1A polymorphisms correlated with clinical outcomes of gastric cancer patients treated with postoperative chemotherapy. Med Oncol 31, 249 (2014). https://doi.org/10.1007/s12032-014-0249-4
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DOI: https://doi.org/10.1007/s12032-014-0249-4