Targeted drug delivery using an aptamer against shared tumor-specific peptide antigen of MAGE-A3.

ABSTRACT: We developed a DNA aptamer, Ap52, against the shared tumor-specific MAGE-A3_111-125 peptide antigen that was used to target multiple types of cancer cells. Here we report the in vivo study of mice implanted with pancreatic tumor cells AsPC-1, which demonstrates accumulation of phosphorothioate-modified Ap52 (ThioAp52) at the xenograft tumor following either intravenous or in situ injection. When complexed with antitumor drug doxorubicin (Dox), ThioAp52 achieves targeted delivery to four types of cancer cells, including breast, oral, pancreatic, and skin. Image analysis shows that ThioAp52-Dox complex selectively enters cancer cells, while free Dox is taken up by all cell lines. The cytotoxicity of ThioAp52-Dox for cancer cells is enhanced as compared to that for the

SUBMITTER: Wang CY 

PROVIDER: S-EPMC7834050 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature