Public Release: 

CETSA HT in early drug discovery through screening against B-Raf and PARP1

SLAS (Society for Laboratory Automation and Screening)


IMAGE: An evaluation of high-throughput CETSA for hit identification and SAR screening with comparisons to alternative assay formats demonstrates the technology can be robustly and reliably applied throughout early drug discovery.... view more 

Credit: Joseph Shaw, AstraZeneca

A new study published ahead-of-print by SLAS Discovery describes an evaluation of microplate-based high-throughput cellular thermal shift assay (CETSA HT) performed at AstraZeneca to assess its suitability and reliability for application to early drug discovery campaigns.

The CETSA is a technology that measures intracellular compound target engagement by quantifying changes in the thermal stability of the target protein in live cells. The technology has a number of advantages over alternative methods including the ability to detect binding to the intended target in cellular models without requiring any overexpression or tagging of the target protein, or any chemical modifications or probe compounds.

Novel CETSA HT assays are described for two important oncology targets, B-Raf and PARP1, and applied to both primary screening for hit identification and SAR screening for lead optimization. Comparisons are performed with conventional drug discovery assay technologies including a biochemical probe-displacement binding assay and a cellular imaging assay.

The findings demonstrate that CETSA HT shows good correlations to other assay formats, but can also highlight different compound responses that allow for a more thorough understanding of cellular effects. CETSA HT can be reliably applied throughout various stages of early drug discovery to quantify intracellular binding to the desired target, providing a better understanding of the action of small molecules which may help advance novel therapeutic drugs.


"Positioning High-Throughput CETSA in Early Drug Discovery through Screening against B-Raf and PARP1" can be accessed for free at For more information about SLAS and its journals, visit

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About our Society and Journals

SLAS (Society for Laboratory Automation and Screening) is an international community of nearly 20,000 professionals and students dedicated to life sciences discovery and technology. The SLAS mission is to bring together researchers in academia, industry and government to advance life sciences discovery and technology via education, knowledge exchange and global community building.

SLAS DISCOVERY: 2016 Impact Factor 2.355. Editor-in-Chief Robert M. Campbell, Ph.D., Eli Lilly and Company, Indianapolis, IN (USA). SLAS Discovery (Advancing Life Sciences R&D) was previously published (1996-2016) as the Journal of Biomolecular Screening (JBS).

SLAS TECHNOLOGY: 2016 Impact Factor 2.632. Editor-in-Chief Edward Kai-Hua Chow, Ph.D., National University of Singapore (Singapore). SLAS Technology (Translating Life Sciences Innovation) was previously published (1996-2016) as the Journal of Laboratory Automation (JALA).

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