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[摘要]：Transcription is activated by signal-induced protein-protein interaction between transcription factors on regulatory elements positioned near their target genes. Here, we tested the utility of the beta-catenin binding RNA aptamer as a tool for studying protein-protein interaction within transcription complex and for modulating expression of a target gene. The RNA aptamer bound Armadillo repeats of beta-catenin and was effective in disrupting protein-protein interaction between beta-catenin and nuclear factor-kappa B (NF-kappa B) p50. In addition, the RNA aptamer effectively reduced tumor necrosis factor-alpha a induced transcription from the promoter of C-reactive protein regulated by beta-catenin and NF-kappa B p50. Taken together, beta-catenin binding RNA aptamer was an effective regulator of beta-catenin and NF-kappa B p50 mediated transcription. |
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