Abstract
Accumulation of mutations and single nucleotide polymorphisms (SNPs) in the displacement loop (D-loop) of mitochondrial DNA (mtDNA) has been identified for their association with cancer risk and disease outcome in a variety of cancers. We have identified cancer risk-associated D-loop SNPs in gastric cancer patients. In this study, we evaluated the predictive value of these SNPs for cancer outcome. Two SNP sites of nucleotides 489C/T and 523–524AC/del were identified for statistically significant prediction of postoperative survival in gastric cancer by univariate analysis with log-rank test. In addition, the mitochondrial DNA haplogroup N (489T) contributed to the good survival of gastric cancer patients compared with the mitochondrial DNA haplogroup M (489C) genotype (relative risk, 1.753; 95 %CI, 1.005–3.060; p = 0.048) by multivariate analysis with COX hazards model. In conclusion, analysis of genetic polymorphisms in the mitochondrial D-loop can help identify subgroups of patients who are at a high risk of a poor disease outcome.
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This work was supported by Key Basic Research Program of Hebei (14967713D).
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Cuiju Wang and Yingnan Wang contributed equally to this work.
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Wang, C., Wang, Y., Wang, H. et al. Mitochondrial DNA haplogroup N is associated good outcome of gastric cancer. Tumor Biol. 35, 12555–12559 (2014). https://doi.org/10.1007/s13277-014-2575-8
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DOI: https://doi.org/10.1007/s13277-014-2575-8