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A loss-of-adhesion CRISPR-Cas9 screening platform to identify cell adhesion-regulatory proteins and signaling pathways

Martin F. M. Rooij, Yvonne J. Thus, Nathalie Swier, Roderick L. Beijersbergen, Steven T. Pals and Marcel Spaargaren ()
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Martin F. M. Rooij: Amsterdam UMC location University of Amsterdam
Yvonne J. Thus: Amsterdam UMC location University of Amsterdam
Nathalie Swier: Amsterdam UMC location University of Amsterdam
Roderick L. Beijersbergen: The Netherlands Cancer Institute
Steven T. Pals: Amsterdam UMC location University of Amsterdam
Marcel Spaargaren: Amsterdam UMC location University of Amsterdam

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract The clinical introduction of the Bruton’s tyrosine kinase (BTK) inhibitor ibrutinib, which targets B-cell antigen-receptor (BCR)-controlled integrin-mediated retention of malignant B cells in their growth-supportive lymphoid organ microenvironment, provided a major breakthrough in lymphoma and leukemia treatment. Unfortunately, a significant subset of patients is intrinsically resistant or acquires resistance against ibrutinib. Here, to discover novel therapeutic targets, we present an unbiased loss-of-adhesion CRISPR-Cas9 knockout screening method to identify proteins involved in BCR-controlled integrin-mediated adhesion. Illustrating the validity of our approach, several kinases with an established role in BCR-controlled adhesion, including BTK and PI3K, both targets for clinically applied inhibitors, are among the top hits of our screen. We anticipate that pharmacological inhibitors of the identified targets, e.g. PAK2 and PTK2B/PYK2, may have great clinical potential as therapy for lymphoma and leukemia patients. Furthermore, this screening platform is highly flexible and can be easily adapted to identify cell adhesion-regulatory proteins and signaling pathways for other stimuli, adhesion molecules, and cell types.

Date: 2022
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DOI: 10.1038/s41467-022-29835-y

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