Mitochondrial and cellular stress pathway components

Mitochondrial and cellular stress pathway components encompass a broad array of signaling networks, such as the Integrated Stress Response (ISR) and the Mitochondrial Unfolded Protein Response (UPRmt), which maintain proteostasis and metabolic balance [1][2]. These pathways are activated by various stimuli, including nutrient deprivation, oxidative stress, and mitochondrial dysfunction, primarily through the phosphorylation of eIF2α or the activation of transcription factors like ATF4 and ATF5 [1][3]. In neurodegenerative diseases like Alzheimer's and Parkinson's, chronic activation of these pathways can lead to persistent translational inhibition and eventual neuronal death [3]. Conversely, in oncology, cancer cells often exploit these stress responses to survive hypoxic and nutrient-poor environments [1]. Pharmacological modulation of these pathways, using agents like ISRIB or NRF2 activators, aims to restore cellular health or induce apoptosis in stressed cells, though systemic toxicity remains a significant challenge due to the fundamental role of these pathways in normal physiology [3][4]. Sources: [1] Pakos-Zebrucka et al. (2016) EMBO Rep; [2] Shpilka & Haynes (2018) Nat Rev Mol Cell Biol; [3] Costa-Mattioli & Walter (2020) Science; [4] Suomalainen & Battersby (2018) Nat Rev Mol Cell Biol.

Other names

Cellular stress response pathwaysMitochondrial stress responseIntegrated stress response (ISR)Mitochondrial unfolded protein response (UPRmt)Organelle stress response

Modulation of specific signaling nodes within stress pathways, such as inhibiting eIF2α phosphorylation, activating NRF2-mediated antioxidant responses, or modulating mitochondrial proteostasis to restore cellular homeostasis or selectively induce apoptosis in damaged cells.