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Elucidation of gene function using C-5 propyne antisense oligonucleotides

Nature Biotechnology volume 14, pages 1139–1145 (1996)Cite this article

Abstract

Identification of human disease-causing genes continues to be an intense area of research. While cloning of genes may lead to diagnostic tests, development of a cure requires an understanding of the gene's function in both normal and diseased cells. Thus, there exists a need for a reproducible and simple method to elucidate gene function. We evaluate C-5 propyne pyrimidine modified phosphorothioate antisense oligonucleotides (ONs) targeted against two human cell cycle proteins that are aberrantly expressed in breast cancer: p34cdc2 kinase and cyclin B1. Dose-dependent, sequence-specific, and gene-specific inhibition of both proteins was achieved at nanomolar concentrations of ONs in normal and breast cancer cells. Precise binding of the antisense ONs to their target RNA was absolutely required for antisense activity. Four or six base-mismatched ONs eliminated antisense activity confirming the sequence specificity of the antisense ONs. Antisense inhibition of p34cdc2 kinase resulted in a significant accumulation of cells in the Gap2/mitosis phase of the cell cycle in normal cells, but caused little effect on cell cycle progression in breast cancer cells. These data demonstrate the potency, specificity, and utility of C-5 propyne modified antisense ONs as biological tools and illustrate the redundancy of cell cycle protein function that can occur in cancer cells.

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  1. W. Michael Flanagan: michael_ flanagan@gilead.com

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  1. Gilead Sciences, 353 Lakeside Dr., Foster City, CA, 94404

    W. Michael Flanagan, Leon L. Su & Richard W. Wagner

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Flanagan, W., Su, L. & Wagner, R. Elucidation of gene function using C-5 propyne antisense oligonucleotides. Nat Biotechnol 14, 1139–1145 (1996). https://doi.org/10.1038/nbt0996-1139

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