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基于聚乙二醇-聚乙烯亚胺与超顺磁性氧化铁的前列腺癌靶向核磁共振显像纳米探针 被引量:5

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摘要 采用单甲基醚聚乙二醇(mPEG-OH)接枝支化聚乙烯亚胺(hy-PEI),得到水溶性共聚物聚乙二醇接枝聚乙烯亚胺(mPEG-g-PEI),通过配体交换的方法包裹超顺磁性四氧化三铁纳米粒子(SPIO),再通过功能化的聚乙二醇(mal-PEG-COOH)与活化的前列腺干细胞抗原(PSCA)单克隆单链抗体结合,获得前列腺癌细胞靶向核磁共振显像纳米探针.研究表明,负载超顺磁性四氧化三铁纳米粒子的聚乙二醇接枝聚乙烯亚胺(mPEI-g-PEG-SPIO)的粒径约为50nm,能显著提高对前列腺癌细胞的特异性输送效率,从而显著地降低前列腺癌细胞的核磁共振成像(MRI)T2信号强度,增强对前列腺癌的识别效率,有可能成为一种前列腺癌MRI早期诊断新型纳米探针或者基因治疗中一种MRI可见的核酸输送载体.
出处 《科学通报》 EI CAS CSCD 北大核心 2009年第10期1330-1337,共8页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:30772178,50673103) 教育部博士点基金(编号:20060558083) 广东省自然科学基金(编号:7003703) 广东省科技基金(编号:7117362) 卫生部部属医院临床学科重点项目资助
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