摘要
循环肿瘤脱氧核糖核酸(ctDNA)是一种新的工具,已经在几种类型的肿瘤中进行了研究,包括结直肠癌。事实上,基于液体活检的技术被认为是组织活检的有吸引力的非侵入性替代方法,增加了对肿瘤分子特征、异质性以及癌症检测和监测的更多见解。此外,一些分析表明,在结直肠癌患者中,结缔组织脱氧核糖核酸似乎作为一种生物标志物,能够预测结果(预后作用)和对治疗的反应(预测作用)。特别是,在早期结直肠癌(第一至第三阶段),它可以代表辅助治疗的时间标记,以及除了已经认识到的风险因素之外的最小残留疾病和复发风险的标记。在转移性结直肠癌中,通过结缔组织脱氧核糖核酸对分子肿瘤谱的分析显示出与诊断时的组织活检高度一致。此外,一些研究表明,治疗期间的ctDNA水平与治疗的早期反应和预后有关。最后,对ctDNA和拷贝数变化的定量分析可能有助于在疾病进展时检测对治疗的耐药性,并有助于寻找新的治疗靶点。
关键词: 分子特征,RAS,异质性,循环肿瘤脱氧核糖核酸,转移性,微小残留病,第二阶段,EGFR。
图形摘要
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