A1 Refereed original research article in a scientific journal
Heat Shock Factor 2 Protects against Proteotoxicity by Maintaining Cell-Cell Adhesion
Authors: Jenny Joutsen, Alejandro Jose Da Silva, Jens Christian Luoto, Marek Andrzej Budzynski, Anna Serafia Nylund, Aurelie de Thonel, Jean-Paul Concordet, Valérie Mezger, Délara Saberan-Djoneidi, Eva Henriksson, Lea Sistonen
Publisher: CELL PRESS
Publication year: 2020
Journal: Cell Reports
Journal name in source: CELL REPORTS
Journal acronym: CELL REP
Volume: 30
Issue: 2
First page : 583
Last page: 587
Number of pages: 21
ISSN: 2211-1247
eISSN: 2211-1247
DOI: https://doi.org/10.1016/j.celrep.2019.12.037
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/46048760
Maintenance of protein homeostasis, through inducible expression of molecular chaperones, is essential for cell survival under protein-damaging conditions. The expression and DNA-binding activity of heat shock factor 2 (HSF2), a member of the heat shock transcription factor family, increase upon exposure to prolonged proteotoxicity. Nevertheless, the specific roles of HSF2 and the global HSF2-dependent gene expression profile during sustained stress have remained unknown. Here, we found that HSF2 is critical for cell survival during prolonged proteotoxicity. Strikingly, our RNA sequencing (RNA-seq) analyses revealed that impaired viability of HSF2-deficient cells is not caused by inadequate induction of molecular chaperones but is due to marked downregulation of cadherin superfamily genes. We demonstrate that HSF2-dependent maintenance of cadherin-mediated cell-cell adhesion is required for protection against stress induced by proteasome inhibition. This study identifies HSF2 as a key regulator of cadherin superfamily genes and defines cell-cell adhesion as a determinant of proteotoxic stress resistance.
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