Aptamer-targeted DNA nanostructures with doxorubicin to treat protein tyrosine kinase 7-positive tumours.

Aptamer-targeted DNA nanostructures with doxorubicin to treat protein tyrosine kinase 7-positive tumours.
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适配体靶向 DNA 纳米结构与阿霉素治疗蛋白酪氨酸激酶 7 阳性肿瘤

DOI:
10.1111/cpr.12511
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发表时间:
2019-01
期刊:
影响因子:
8.5
通讯作者:
Lin Y
Lin Y
中科院分区:
生物学1区
文献类型:
--
作者:
Liu M;Ma W;Li Q;Zhao D;Shao X;Huang Q;Hao L;Lin Y

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适体sgc8c是一段能够靶向蛋白酪氨酸激酶7(PTK7)的短DNA序列,PTK7在许多肿瘤细胞上过表达。本研究旨在构建一种以PTK7阳性细胞为靶点的新型DNA纳米给药系统-CCRF-CEM(Human T-cell ALL)。采用一步热退火法合成了适体修饰的四面体DNA。应用负载DOX复合体的SGC8c-TDNS(S-TDNS),研究其对PTK7阴性和阳性细胞的作用。在体外实验中,当S-TdN:DOX分别作用于PTK7阳性细胞和阴性细胞时,它们对PTK7阳性细胞有特异性的毒性作用,而对PTK7阴性的Ramos细胞无明显的毒性作用。在这项工作中,我们通过一锅法成功构建了PTK7靶向核酸适体引导的四面体纳米结构(S-TdN)作为药物传递系统。结果表明,S-TdN:DOX对PTK7阳性的CCRF-CEM细胞有较强的杀伤作用,而对PTK7阴性的Ramos细胞的杀伤作用较弱。因此,这种功能化的TDNS给药系统在靶向PTK7阳性肿瘤T细胞急性淋巴细胞性白血病方面显示了其潜在的应用前景。
Aptamer sgc8c is a short DNA sequence that can target protein tyrosine kinase 7 (PTK7), which was overexpressed on many tumour cells. This study aimed to fabricate a novelty DNA nanostructure drug delivery system target on PTK7‐positive cells—CCRF‐CEM (human T‐cell ALL). Aptamer‐modified tetrahedron DNA was synthesized through one‐step thermal annealing process. The sgc8c‐TDNs (s‐TDNs) loading DOX complexes were applied to investigate the effect to PTK7‐negative and ‐positive cells. When s‐TDN:DOX acted on PTK7‐positive and ‐negative cells respectively, the complexes exhibited specific toxic effect on PTK7‐positive cells but not on PTK7‐negative Ramos cells in vitro research. In this work, we successfully constructed a PTK7‐targeting aptamer‐guided DNA tetrahedral nanostructure (s‐TDN) as a drug delivery system via a facile one‐pot synthesis method. The results showed that s‐TDN:DOX exhibited enhanced cytotoxicity against PTK7‐positive CCRF‐CEM cells, with a minor effect against PTK7‐negative Ramos cells. Hence, this functionalized TDNs drug delivery system displayed its potential application in targeting PTK7‐positive tumour T‐cell acute lymphoblastic leukaemia.
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