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Thakur, S.* ; Cahais, V.* ; Turkova, T.* ; Zikmund, T. ; Renard, C.* ; Stopka, T.* ; Korenjak, M.* ; Zavadil, J.*

Chromatin remodeler smarca5 is required for cancer-related processes of primary cell fitness and immortalization.

Cells 11:808 (2022)
Publ. Version/Full Text Research data DOI PMC
Open Access Gold
Creative Commons Lizenzvertrag
Smarca5, an ATPase of the ISWI class of chromatin remodelers, is a key regulator of chromatin structure, cell cycle and DNA repair. Smarca5 is deregulated in leukemia and breast, lung and gastric cancers. However, its role in oncogenesis is not well understood. Chromatin remodelers often play dosage-dependent roles in cancer. We therefore investigated the epigenomic and phenotypic impact of controlled stepwise attenuation of Smarca5 function in the context of primary cell transformation, a process relevant to tumor formation. Upon conditional single-or double-allele Smarca5 deletion, the cells underwent both accelerated growth arrest and senescence entry and displayed gradually increased sensitivity to genotoxic insults. These phenotypic characteristics were explained by specific remodeling of the chromatin structure and the transcriptome in primary cells prior to the immortalization onset. These molecular programs implicated Smarca5 requirement in DNA damage repair, telomere maintenance, cell cycle progression and in restricting apoptosis and cellular senescence. Consistent with the molecular programs, we demonstrate for the first time that Smarca5-deficient primary cells exhibit dramatically decreased capacity to bypass senescence and immortalize, an indispensable step during cell transformation and cancer development. Thus, Smarca5 plays a crucial role in key homeostatic processes and sustains cancer-promoting molecular programs and cellular phenotypes.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Atac-seq ; Cell Cycle ; Cell Immortalization ; Homologous Recombination ; Mef ; Non-homologous End-joining ; Rna-seq ; Senescence ; Smarca5 ; Snf2h
ISSN (print) / ISBN 2073-4409
e-ISSN 2073-4409
Journal Cells
Quellenangaben Volume: 11, Issue: 5, Pages: , Article Number: 808 Supplement: ,
Publisher MDPI
Publishing Place Basel
Non-patent literature Publications
Institute(s) Institute of Epigenetics and Stem Cells (IES)
Grants Charles University stipends: SVV260521, UNCE/MED/016

Grant Agency of the Ministry of Health of the Czech Republic