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Screening for noise in gene expression identifies drug synergies.


ABSTRACT: Stochastic fluctuations are inherent to gene expression and can drive cell-fate specification. We used such fluctuations to modulate reactivation of HIV from latency-a quiescent state that is a major barrier to an HIV cure. By screening a diverse library of bioactive small molecules, we identified more than 80 compounds that modulated HIV gene-expression fluctuations (i.e., "noise"), without changing mean expression. These noise-modulating compounds would be neglected in conventional screens, and yet, they synergized with conventional transcriptional activators. Noise enhancers reactivated latent cells significantly better than existing best-in-class reactivation drug combinations (and with reduced off-target cytotoxicity), whereas noise suppressors stabilized latency. Noise-modulating chemicals may provide novel probes for the physiological consequences of noise and an unexplored axis for drug discovery, allowing enhanced control over diverse cell-fate decisions.

SUBMITTER: Dar RD 

PROVIDER: S-EPMC4122234 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature

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Screening for noise in gene expression identifies drug synergies.

Dar Roy D RD   Hosmane Nina N NN   Arkin Michelle R MR   Siliciano Robert F RF   Weinberger Leor S LS  

Science (New York, N.Y.) 20140605 6190


Stochastic fluctuations are inherent to gene expression and can drive cell-fate specification. We used such fluctuations to modulate reactivation of HIV from latency-a quiescent state that is a major barrier to an HIV cure. By screening a diverse library of bioactive small molecules, we identified more than 80 compounds that modulated HIV gene-expression fluctuations (i.e., "noise"), without changing mean expression. These noise-modulating compounds would be neglected in conventional screens, an  ...[more]

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