Issue 10, 2021

Uptake mechanisms of cell-internalizing nucleic acid aptamers for applications as pharmacological agents

Abstract

Nucleic acid aptamers, also regarded as chemical antibodies, show potential as targeted therapeutic and delivery agents since they possess unique advantages over antibodies. Generated by an iterative selection and amplification process from oligonucleotide libraries using cultured cells, the aptamers bind to their target molecules expressed on the cell surface. Excitingly, most aptamers also demonstrate a cell-internalizing property in native living cells, allowing them to directly enter the cells via endocytosis depending on the target. In this review, we discuss selection methods in generating cell-internalizing aptamers via a cell-based selection process, along with their challenges and optimization strategies. We highlight the cellular uptake routes adopted by the aptamers and also their intracellular fate after the uptake, to give an overview of their mechanism of action for applications as promising pharmacological agents.

Graphical abstract: Uptake mechanisms of cell-internalizing nucleic acid aptamers for applications as pharmacological agents

Article information

Article type
Review Article
Submitted
15 Jun 2021
Accepted
15 Jul 2021
First published
24 Jul 2021

RSC Med. Chem., 2021,12, 1640-1649

Uptake mechanisms of cell-internalizing nucleic acid aptamers for applications as pharmacological agents

S. H. Alamudi, M. Kimoto and I. Hirao, RSC Med. Chem., 2021, 12, 1640 DOI: 10.1039/D1MD00199J

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