Motohashi Y, Nishihara T, Tanabe K. Preparation of a multifunctional photoactivated prodrug on a streptavidin scaffold bearing a DNA aptamer.
Bioorg Med Chem Lett 2022;
71:128819. [PMID:
35643261 DOI:
10.1016/j.bmcl.2022.128819]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 11/19/2022]
Abstract
Prodrugs that present strong cytotoxicity toward specific cells have been utilized for cell-type selection and purification. In this study, we designed and prepared a multifunctional, photoactivated prodrug based on a streptavidin scaffold. Biotin-labeled DNA aptamer that recognizes the membrane antigen EpCAM, and biotin-labeled photoactivated prodrug bearing the antitumor camptothecin, were prepared. Both molecules were linked to the streptavidin scaffold by simple mixing. The resulting prodrug bound to the EpCAM-overexpressing SK-BR-3 target cells and showed cytotoxic effects upon photoirradiation, corresponding to cytotoxic drug release.
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