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A novel chemotherapy drug-free delivery system composed of three therapeutic aptamers for the treatment of prostate and breast cancers in vitro and in vivo.
In this study, a novel chemotherapy drug-free DNA nanocomplex composed of three therapeutic aptamers (IDA, AS1411 and apMNK2F) was designed for treatment of cancer cells. For MTT assay, PC-3 and 4T1 cells (target cells) and CHO cells (nontarget cells) were treated with apMNK2F-AS1411-IDA complex (DNA nanocomplex), as well as AS1411, IDA and apMNK2F alone. Internalization of apMNK2F-AS1411-IDA complex was analyzed by fluorescence imaging and flow cytometry analysis. In the last step, the presented DNA nanocomplex was applied for prohibition of tumor growth in vivo. The results of internalization assay verified that the developed apMNK2F-AS1411-IDA complex was remarkably internalized into PC-3 and 4T1 cells, but not into CHO cells. The results of internalization assay was confirmed by MTT assay. apMNK2F-AS1411-IDA complex was more cytotoxic in PC-3 and 4T1 cells (target) and less cytotoxic in CHO cells (nontarget). Also, the DNA nanocomplex could effectively suppress the growth of tumors in vivo.
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