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Related Concept Videos

Genetic Screens02:46

Genetic Screens

Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...

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Cellular Target Deconvolution of Small Molecules Using a Selection-Based Genetic Screening Platform.

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We developed a new CRISPR knockout screening platform for identifying drug targets in signaling pathways. This method successfully identified STING as the target for BDW568, a type-I interferon signaling activator.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Drug Discovery

Background:

  • Small-molecule drug target identification is crucial but challenging in phenotypic drug discovery.
  • Identifying targets for signaling pathway activators is essential for therapeutic development.

Purpose of the Study:

  • To present a novel platform for identifying drug targets of small-molecule activators using CRISPR technology.
  • To demonstrate the platform's efficacy in identifying targets and essential genes involved in small molecule activity.

Main Methods:

  • Utilized a clustered regularly interspaced short palindromic repeats (CRISPR) knockout library coupled with a suicide gene selection system.
  • Performed loss-of-function screening with CRISPR single-guide (sg) RNA to enrich cells with knocked-out targets.
  • Employed sequencing to identify drug targets and essential genes.

Main Results:

  • Successfully identified Stimulator of Interferon Genes (STING) as the direct target of BDW568, a type-I interferon signaling activator.
  • Identified Carboxylesterase 1 (CES1) as a key metabolizing enzyme required for BDW568 activation and target engagement.
  • Validated the platform's capability for general application in drug target identification.

Conclusions:

  • The developed CRISPR-based platform offers a robust method for identifying small-molecule drug targets and related genes.
  • This approach accelerates phenotypic drug discovery by efficiently pinpointing molecular targets and activation mechanisms.
  • The platform is broadly applicable to various small molecules and signaling pathways, paving the way for new therapeutic strategies.