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Hairpin/DNA Ring Ternary Complex Initiated Rolling Circle Amplification for an Elevated Accuracy and Its Application in Analyzing Let-7a
ACS Omega ( IF 3.7 ) Pub Date : 2023-11-10 , DOI: 10.1021/acsomega.3c06227
Hongyu Hui 1 , Xianxian Zhao 2 , Hongmin Zhang 3 , Xiaoyan Li 4 , Ping Fu 1 , Mingbin Wu 5 , Qingqing Dai 1
ACS Omega ( IF 3.7 ) Pub Date : 2023-11-10 , DOI: 10.1021/acsomega.3c06227
Hongyu Hui 1 , Xianxian Zhao 2 , Hongmin Zhang 3 , Xiaoyan Li 4 , Ping Fu 1 , Mingbin Wu 5 , Qingqing Dai 1
Affiliation
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Rolling circle amplification (RCA) is an attractive isothermal nucleic acid amplification approach and has been widely applied in constructing a variety of biosensors. However, the inevitable drawbacks of lacking enough selectivity greatly hindered further applications of RCA-based approaches. Here, we develop a novel RCA-based approach by integrating the specific target recognition capability of the hairpin/DNA ring ternary complex and multiple signal amplification and successfully applied it for let-7a detection. In this method, let-7a specifically unfolds the hairpin probe (Hp probe) in the ternary complex to induce target recycle and RCA- and DNAzyme-based signal generation. Based on this, the established approach exhibits a high selectivity to let-7a, and the response of the approach to one base pair mismatched sequences was 24.9%, indicating a significantly improved specificity. Meanwhile, the limit of detection is as low as 342 aM, which can meet the high requirement for a trace amount of miRNA detection. In all, we believe that the established approach can offer a new avenue for miRNA detection and post-tumor care.
中文翻译:
发夹/DNA环三元复合物启动滚环扩增提高准确度及其在分析Let-7a中的应用
滚环扩增(RCA)是一种有吸引力的等温核酸扩增方法,已广泛应用于构建各种生物传感器。然而,缺乏足够选择性的不可避免的缺点极大地阻碍了基于 RCA 的方法的进一步应用。在这里,我们通过整合发夹/DNA环三元复合物的特定目标识别能力和多重信号放大,开发了一种基于RCA的新型方法,并成功地将其应用于let-7a检测。在此方法中,let-7a 特异性展开三元复合物中的发夹探针(Hp 探针),以诱导靶标循环以及基于 RCA 和 DNAzyme 的信号生成。基于此,所建立的方法对let-7a表现出较高的选择性,该方法对1个碱基对错配序列的响应率为24.9%,特异性显着提高。同时,检测限低至342 aM,可以满足微量miRNA检测的高要求。总之,我们相信所建立的方法可以为 miRNA 检测和肿瘤后护理提供新途径。
更新日期:2023-11-10
中文翻译:

发夹/DNA环三元复合物启动滚环扩增提高准确度及其在分析Let-7a中的应用
滚环扩增(RCA)是一种有吸引力的等温核酸扩增方法,已广泛应用于构建各种生物传感器。然而,缺乏足够选择性的不可避免的缺点极大地阻碍了基于 RCA 的方法的进一步应用。在这里,我们通过整合发夹/DNA环三元复合物的特定目标识别能力和多重信号放大,开发了一种基于RCA的新型方法,并成功地将其应用于let-7a检测。在此方法中,let-7a 特异性展开三元复合物中的发夹探针(Hp 探针),以诱导靶标循环以及基于 RCA 和 DNAzyme 的信号生成。基于此,所建立的方法对let-7a表现出较高的选择性,该方法对1个碱基对错配序列的响应率为24.9%,特异性显着提高。同时,检测限低至342 aM,可以满足微量miRNA检测的高要求。总之,我们相信所建立的方法可以为 miRNA 检测和肿瘤后护理提供新途径。