摘要
背景：人表皮生长因子受体2(HER 2)在头颈部鳞状细胞癌(HNSCC)细胞株HN5中的表达，为人头颈部鳞状细胞癌(HNSCC)细胞株HN5的成功应用提供了抗癌化疗药物的特异性靶向性研究。 目的：本研究选择her 2特异性粘附体分子zher 2：342(一种与her 2受体有很强亲和力的工程蛋白)与伊大比星(一种抗新生体)结合。(IC抗生素) 方法：在ITS 5‘端添加半胱氨酸编码的ZHER 2：342亲和体基因重新合成，插入pET 302质粒，转入大肠杆菌BL 21宿主系统。后印利用Ni-NTA树脂纯化了重组ZHER 2亲体分子，并用SDS-PAGE分析了其纯度。亲和纯化的粘附体分子通过异双功能交联剂磺基琥珀酰亚胺4-(N-马来酰亚胺基)环己烷-1-羧酸盐(Sulfo-SMCC)。依达鲁比星-ZHER 2粘附体结合物对t的特异性毒性用MTT法检测WoHER 2阳性细胞、HN5和MCF-7在不同浓度的共轭物作用48h后的变化。 结果：非偶联型依达拉霉素对两种细胞系均有较强的毒性作用，而HN5细胞对MCF-7细胞的敏感性明显高于MCF-7细胞。二聚体ZHER 2在最佳浓度下，对HN5和MCF-7细胞的生长均有轻微的抑制作用。伊达比星-ZHER 2结合物在最佳浓度下降低Hn5细胞活力的研究与MCF-7细胞株比较有显着性差异。 结论：依达比星-ZHER 2亲和体结合物的最佳浓度可用于HN5细胞的特异性靶向和杀伤。
关键词: 头颈部肿瘤，HN5细胞，HER 2受体，特异性靶向，依达卢比-ZHER 2结合物。
图形摘要
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