南方医科大学学报2017，Vol.37Issue(7)：962-966,5.DOI:10.3969/j.issn.1673-4254.2017.07.20
结直肠癌患者血浆循环游离DNA的RAS突变与临床特征的关系
Association of RAS mutations in circulating cell-free DNA in the plasma with clinicopathological features of colorectal cancer
摘要
Abstract
Objective To detect RAS mutations in the circulating cell-free DNA (cfDNA) in the plasma and explore the their correlation with the clinicopathological features in patients with colorectal cancer. Methods Real-time PCR was used to detect RAS mutations in plasma cfDNA and matched tumor tissue DNA samples from 71 colorectal cancer patients. The correlation of RAS mutations with the clinicopathological features of the patients were analyzed. Results Of the 71 patients with colorectal cancer, 23 (32.39%) showed RAS mutations in the cfDNA and 36 (50.7%) showed RAS mutations in tumor tissue DNA, with a concordance rate of 76.06% in the results between the two samples (Kappa=0.523). RAS mutations in the cfDNA were not related to the patients' age (P=0.072), gender (P=0.320), tumor stage (IVa and IVb, P=0.450), primary tumor position (P=0.324), lung metastasis (P=0.237), CEA level (P=0.284) or CA199 level (P=0.427). The positivity rate of RAS mutations in plasma cfDNA was significantly higher in patients with liver metastasis than those without liver metastasis (P=0.045). Conclusion Plasma cfDNA can be a reliable source of diagnostic DNA to replace the tumor tissue DNA for diagnosis of RAS mutations. RAS mutations in plasma cfDNA occur more frequently in colorectal cancer patients with liver metastasis.关键词
结直肠癌/循环游离DNA/RASKey words
colorectal cancer/circulating cell-free DNA/RAS引用本文复制引用
伍婧,招丽蓉,林秀强,冯芬,陈永昌,邓伟英,邓燕明,王巍..结直肠癌患者血浆循环游离DNA的RAS突变与临床特征的关系[J].南方医科大学学报,2017,37(7):962-966,5.基金项目
2015年佛山市医学类科技攻关项目(2015AB00309) （2015AB00309）
