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为了快速检出APC基因突变,应用选择性检测产生终止密码突变的体外蛋白合成试验(IVSP),对115例Non-FAP大肠肿瘤标本进行了研究。发现76例107条不全蛋白条带,序列分析证实94%(101/107)为突变带,其中6条非特异性带可能与片段内ATG启动子存在有关。为排除小分子量APC不全蛋白的遗漏,对各片段起始部的400直接行序列分析均未检出突变点。结果显示,IVSP不仅是迄今最为快速、敏感和特异的APC突变检测方法之一,而且还有助于突变的定性(病理性)和定位。
In order to rapidly detect APC gene mutations, an in vitro Protein Synthesis Assay (IVSP) was performed to selectively detect non-FAP colorectal tumors. Seventy-seven samples of 107 incomplete protein bands were found. Sequence analysis confirmed that 94% (101/107) of the bands were mutational bands, of which 6 non-specific bands may be related to the presence of the ATG promoter in the fragments. To exclude the omission of small-molecular-weight APC incomplete proteins, no mutations were detected in the 400 direct sequence analysis of the start of each fragment. The results show that IVSP is not only one of the fastest, sensitive and specific APC mutation detection methods to date, but also contributes to the qualitative (pathological) and localization of mutations.