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Selection of Aptamers against Metastatic Tumor Cells for Molecular Imaging

Abstract

转移是导致癌症死亡的最主要原因,但基于形态标准的传统诊断方法只能对癌症的晚期表现进行成像。基于配体指数富集系统进化(SELEX)技术获得的核酸适体,被誉为“化学抗体”。与抗体相比,核酸适体具有靶分子广泛,化学合成、修饰方便,稳定性好,分子量小,无免疫原性等优势。因此,发展特异性识别转移癌细胞的核酸适体进行分子成像,将有利于转移癌的早期诊断、合理治疗和准确预后。本文围绕转移性癌细胞的核酸适体筛选及应用,主要开展以下两方面的工作: (1)转移性乳腺癌细胞MDA-MB-231的核酸适体筛选及应用。 乳腺癌是最常见的女性癌症。一般通过活检、X线影像、超声和MR成像等显微分析方法对乳腺癌进行诊断。但...Metastasis is the leading cause of cancer deaths, and traditional diagnostic methods based on morphologic criteria mainly image the advanced manifestation of cancer. Aptamers evolved by Systematic Evolution of Ligands by Exponential Enrichment (SELEX) are known as the “artificial antibody” with high affinity and specificity to their targets. Compared with antibodies, aptamers have significant adva...学位:理学硕士院系专业:化学化工学院_分析化学学号:2052011115158

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