Flow cytometry-based functional selection of RNA interference triggers for efficient epi-allelic analysis of therapeutic targets.

Flow cytometry-based functional selection of RNA interference triggers for efficient epi-allelic analysis of therapeutic targets.
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DOI:
10.1186/1472-6750-14-57
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发表时间:
2014-06-21
期刊:
影响因子:
3.5
通讯作者:
Lorens JB
Lorens JB
中科院分区:
工程技术3区
文献类型:
--
作者:
Micklem DR;Blø M;Bergström P;Hodneland E;Tiron C;Høiby T;Gjerdrum C;Hammarsten O;Lorens JB

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The dose-response relationship is a fundamental pharmacological parameter necessary to determine therapeutic thresholds. Epi-allelic hypomorphic analysis using RNA interference (RNAi) can similarly correlate target gene dosage with cellular phenotypes. This however requires a set of RNAi triggers empirically determined to attenuate target gene expression to different levels. In order to improve our ability to incorporate epi-allelic analysis into target validation studies, we developed a novel flow cytometry-based functional screening approach (CellSelectRNAi) to achieve unbiased selection of shRNAs from high-coverage libraries that knockdown target gene expression to predetermined levels. Employing a Gaussian probability model we calculated that knockdown efficiency is inferred from shRNA sequence frequency profiles derived from sorted hypomorphic cell populations. We used this approach to generate a hypomorphic epi-allelic cell series of shRNAs to reveal a functional threshold for the tumor suppressor p53 in normal and transformed cells. The unbiased CellSelectRNAi flow cytometry-based functional screening approach readily provides an epi-allelic series of shRNAs for graded reduction of target gene expression and improved phenotypic validation.
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