In order to identify genes that can serve as indicators for predicting the effectiveness of drug treatments in cancers and provide novel methods for predicting the effectiveness of treatments with drugs targeting said genes, transcriptome sequencing was performed of diffuse-type gastric cancer. As a result, in-frame fusion transcripts between the CEP55 gene and the RET gene were identified. It was also found that said gene fusions induce activation of RET protein, thereby causing canceration of cells. Further, it was demonstrated that the RET protein activation and canceration caused by said gene fusion can be suppressed by using a RET tyrosine kinase inhibitor, and that treatments with a RET tyrosine kinase inhibitor are effective in patients with detection of said gene fusion.
为了确定可作为预测癌症药物治疗效果指标的
基因,并为预测针对上述
基因的药物治疗效果提供新方法,对弥漫型胃癌进行了转录组测序。结果发现了 CEP55
基因与 RET
基因的框架内融合转录本。研究还发现,上述
基因融合会诱导 RET 蛋白活化,从而导致细胞癌变。此外,研究还证明,使用 RET
酪氨酸激酶
抑制剂可抑制上述
基因融合引起的 RET 蛋白活化和癌变,而且使用 RET
酪氨酸激酶
抑制剂治疗对检测出上述
基因融合的患者有效。