Publication details

ER Stress Modulates Senescence and EMT in Ovarian Surface Epithelium

Authors

KRATOCHVÍLOVÁ Kateřina MORÁŇ Lukáš FONT CALVARONS Cristina BALTASOVÁ Ivana HAMPL Aleš VAŇHARA Petr

Year of publication 2016
Type Conference abstract
Citation
Description Endoplasmic reticulum (ER) is a multifunctional organelle primarily responsible for protein synthesis and folding. Disruption of ER function triggers a protective machinery called the unfolded protein response (UPR). UPR pathways then arrest the RNA translation and increase the production of ER chaperones to alleviate ER stress, or, if the stress cannot be resolved, UPR induces phenotypic change and/or apoptosis. Cellular senescence is a complex cell phenotype, whereby cells irreversibly cease to divide after a number of passages. It can be induced by telomere shortening, DNA damage, oxidative stress and activation of some oncogenes. Senescent cells accumulate with age in tissues and are assumed to play a role in age-associated diseases, such as Alzheimer disease or cancer. In our work, induction of senescence lead to upregulation of UPR hallmark proteins and interestingly, alleviation of ER stress by inhibition of UPR signaling or by chemical chaperons, overridden the onset of senescence. In summary, these results indicate a biologically relevant link between UPR and senescence of OSE cells that may contribute to better understanding of ovarian pathologies extending the portfolio of druggable molecular targets.