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The research project focused on heat shock factor 2 (HSF2), a specialized gene regulating protein, and its impact on cells' capacity to survive protein-damaging stress. Protein-damaging stress is caused by, for example, high temperatures, virus infections and certain anti-cancer medications.
The results showed that HSF2 contributes to protecting cells against stress by regulating those genes that mediate cell adhesion contacts.
The results were obtained by studying, among other things, how cancer cells respond to certain commonly used anti-cancer drugs. Cancer cells with impaired cell adhesion contacts were significantly less successful in surviving the drug treatment than the cells showing intact cell adhesion.
"Cell-to-cell contacts are essential for normal tissue functioning and mechanisms. Cancer cells are known to utilize these contacts to form aggressive tumors and metastases. Our results show, indeed, that cancer cells become more vulnerable to drug treatment, when their cell contacts are weakened", says Sistonen.
"Cell adhesion contacts are mediated by proteins known as cadherins, which serve as the source of message chains regulating cell death, but understanding of the molecular basis for these processes calls for further research. Individual differences in these particular cell processes may partly explain why certain drugs work effectively for some patients but not for others."
The research headed by Professor Sistonen is part of the CellMech project, an internal Center of Excellence project in Cellular Mechanostasis (2019-2023) at Åbo Akademi University, which studies the impacts of mechanical stress on the signaling and functioning of cells and tissues. The CellMech project is led by Cecilia Sahlgren, Professor in Cell Biology. Drug Development and Diagnostics is one of the focal research areas at Åbo Akademi University. Source:
Abo Akademi University Journal reference:
Joutsen, J., et al. (2020) Heat Shock Factor 2 Protects against Proteotoxicity by Maintaining Cell-Cell Adhesion. Cell Reports . doi.org/10.1016/j.celrep.2019.12.037 .
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