Cell stress adaptive response pathway

The cell stress adaptive response pathway is a collective term for several conserved signaling networks, including the Integrated Stress Response (ISR), the Unfolded Protein Response (UPR), and the Heat Shock Response (HSR), which enable cells to adapt to environmental and internal stressors (Source: Nature Reviews Molecular Cell Biology, DOI: 10.1038/nrm.2017.129). These pathways are activated by triggers such as nutrient deprivation, viral infection, oxidative stress, and the accumulation of misfolded proteins in the endoplasmic reticulum (Source: PubMed, PMID: 29449310). Upon activation, these pathways typically lead to a transient inhibition of general protein synthesis while selectively increasing the translation of cytoprotective genes, such as molecular chaperones and antioxidant enzymes (Source: Science, DOI: 10.1126/science.1236301). While these responses are initially pro-survival, chronic or overwhelming stress can shift the signaling toward pro-apoptotic pathways, contributing to the pathogenesis of neurodegenerative disorders, metabolic diseases, and cancer (Source: NIH, StatPearls, Cellular Stress Response). In oncology, tumors often hijack these adaptive responses to survive in harsh microenvironments and resist chemotherapy, making components of these pathways attractive targets for therapeutic intervention (Source: PubMed, PMID: 31036890). Small molecules like ISRIB and proteasome inhibitors like Bortezomib are examples of agents that modulate these pathways to achieve therapeutic effects (Source: PubMed, PMID: 23640885).

Other names

Integrated stress responseUnfolded protein responseHeat shock responseCellular stress responseAdaptive stress signaling

Modulation of eIF2α phosphorylation, inhibition of the proteasome, induction of ER stress, or activation of heat shock proteins to either restore homeostasis or trigger apoptosis in diseased cells.