TY - JOUR T1 - Activation of mitochondrial unfolded protein response protects against multiple exogenous stressors JF - Life Science Alliance JO - Life Sci. Alliance DO - 10.26508/lsa.202101182 VL - 4 IS - 12 SP - e202101182 AU - Sonja K Soo AU - Annika Traa AU - Paige D Rudich AU - Meeta Mistry AU - Jeremy M Van Raamsdonk Y1 - 2021/12/01 UR - https://www.life-science-alliance.org/content/4/12/e202101182.abstract N2 - The mitochondrial unfolded protein response (mitoUPR) is an evolutionarily conserved pathway that responds to mitochondria insults through transcriptional changes, mediated by the transcription factor ATFS-1/ATF-5, which acts to restore mitochondrial homeostasis. In this work, we characterized the role of ATFS-1 in responding to organismal stress. We found that activation of ATFS-1 is sufficient to cause up-regulation of genes involved in multiple stress response pathways including the DAF-16–mediated stress response pathway, the cytosolic unfolded protein response, the endoplasmic reticulum unfolded protein response, the SKN-1–mediated oxidative stress response pathway, the HIF-1-mediated hypoxia response pathway, the p38-mediated innate immune response pathway, and antioxidant genes. Constitutive activation of ATFS-1 increases resistance to multiple acute exogenous stressors, whereas disruption of atfs-1 decreases stress resistance. Although ATFS-1–dependent genes are up-regulated in multiple long-lived mutants, constitutive activation of ATFS-1 decreases lifespan in wild-type animals. Overall, our work demonstrates that ATFS-1 serves a vital role in organismal survival of acute stressors through its ability to activate multiple stress response pathways but that chronic ATFS-1 activation is detrimental for longevity. ER -