Characterization of oligonucleotide transport into living cells

S. L. Loke, C. A. Stein, X. H. Zhang, K. Mori, M. Nakanishi, C. Subasinghe, J. S. Cohen, L. M. Neckers

Research output: Contribution to journalArticlepeer-review

774 Scopus citations

Abstract

Addition of antisense oligonucleotides to cell cultures has been used to specifically inhibit gene expression. We have investigated the mechanism by which oligonucleotides enter living cells. These compounds are taken up by cells in a saturable, size-dependent manner compatible with receptor-mediated endocytosis. Polynucleotides of any length are competitive inhibitors of oligomer transport, providing they possess a 5'-phosphate moiety. Using oligo(dT)-cellulose for affinity purification, we have identified an 80-kDa surface protein that may mediate transport. Knowledge of the oligonucleotide transport mechanism should facilitate the design of more effective synthetic antisense oligomers as potential clinical agents.

Original languageEnglish
Pages (from-to)3474-3478
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume86
Issue number10
DOIs
StatePublished - 1 Jan 1989
Externally publishedYes

ASJC Scopus subject areas

  • General

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