申请人:Tokyo University of Science Foundation
公开号:EP3998338A1
公开(公告)日:2022-05-18
A nucleic acid amplification method using a solid-phase carrier according to the present invention comprises: capturing a target nucleic acid comprising mRNA on a solid-phase carrier; carrying out complementary-strand synthesis on the solid phase; carrying out exonuclease treatment to degrade and remove unreacted target-capturing nucleic acid on the solid phase; and then carrying out mRNA degradation and homopolymer addition by TdT reaction in the presence of a chain-terminating nucleotide triphosphate. According to the method of the present invention, cDNA can be stably and highly efficiently amplified even from a small amount of sample even in cases where the ratio of the amount of enzyme to the DNA substrate on the solid phase is excessive, where the reaction time is excessive, and/or where reagents show lot-to-lot variation. Further, the amplification method of the present invention can broaden the range of applications of techniques in which analysis using a specific-binding molecule labeled with an oligonucleic acid such as a DNA-labeled antibody and analysis of transcripts are carried out simultaneously.
根据本发明,一种使用固相载体的核酸扩增方法包括:在固相载体上捕获由mRNA组成的目标核酸;在固相上进行互补链合成;进行外切酶处理以降解和去除固相上未反应的目标捕获核酸;然后在链终止核苷酸三磷酸存在下通过TdT反应进行mRNA降解和均聚物添加。根据本发明的方法,即使在固相上酶与 DNA 底物的量比过大、反应时间过长和/或试剂出现批次间差异的情况下,也能从少量样品中稳定、高效地扩增出 cDNA。此外,本发明的扩增方法可以拓宽使用 DNA 标记抗体等寡核酸标记的特异性结合分子进行分析和转录本分析同时进行的技术的应用范围。