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Eukaryotic initiation factor (eIF) modulators act on the proteins that start translation of messenger RNA (mRNA). The cap-binding protein eIF4E recruits the scaffold eIF4G and the RNA helicase eIF4A, which together form the eIF4F complex. 4EGI-1, reported in 2007, inhibits the interaction between eIF4E and eIF4G, and 4E1RCat and 4E2RCat disrupt the same assembly. Silvestrol targets eIF4A, while eIF4A3-IN-1 acts on the related helicase eIF4A3. Under cellular stress, phosphorylation of the eIF2α subunit lowers global protein synthesis. Salubrinal, described in 2005, inhibits eIF2α dephosphorylation and protects cells from endoplasmic reticulum (ER) stress. ISRIB (trans-isomer), reported in 2013, restores translation in cells with phosphorylated eIF2α and enhanced memory in rodents.
Episilvestrol is a derivative of Silvestrol, which can induce apoptosis in LNCaP cells through the mitochondrial/apoptosome pathway without activation of executioner caspase-3 or -7; 5'myc-UTR-LUC inhibtior (IC50= 0.8 nM).
CCT020312 is a selective EIF2AK3/PERK activator. CCT020312 elicits EIF2A phosphorylation in cells.
HR-19011 is an eIF2α phosphorylation activator that specifically targets the heme-regulated inhibitor HRI (EIF2AK1). It demonstrates significant growth inhibitory activity against K562 leukemia cells, with an IC50 value of 3.91 µM. By activating the integrated stress response through the HRI-eIF2α-ATF4 axis, HR-19011 effectively contributes to the suppression of hematologic malignancies. Its favorable safety profile in vivo further supports its use in research focused on leukemia and other blood-related cancers.
PRXS571 is a potent modulator of the integrated stress response (ISR) in neurons. This compound enhances our understanding of the cellular mechanisms underlying stress adaptation, making it valuable for research into neurodegenerative diseases and other neurological conditions. PRXS571 can be utilized to investigate the role of ISR modulation in various biological processes and therapeutic applications.
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ISR Modulator-1 is a compound that targets the integrated stress response (ISR) pathway. It functions by modulating cellular responses to stressors, enhancing cell survival under adverse conditions. This reagent is valuable for research applications investigating the mechanisms of cellular stress, neurodegenerative diseases, and metabolic disorders.
ISR Activator 3 (Compound cc81) is a potent activator of the integrated stress response (ISR), targeting RIG-I with a dissociation constant of approximately 0.55 μM. This compound enhances the interferon response in the presence of viral mimicry signals while not inducing lipid droplet clearance. ISR Activator 3 is suitable for research related to neurodegenerative diseases and immune stress mechanisms, providing valuable insights into cellular stress pathways and their implications in various biological contexts.
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ISR Activator 2 is a selective activator of the integrated stress response (ISR), primarily targeting the cytosolic pattern recognition receptor RIG-I. By binding to RIG-I, it notably activates the heme-regulated inhibitor (HRI) ISR kinase without invoking an interferon response. This compound is especially relevant for research into pancreatic cancer, offering insights into the mechanisms of stress response and potential therapeutic strategies.
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2BAct is a selective activator of the eukaryotic initiation factor 2B (eIF2B) with an EC50 of 33 nM. This compound effectively prevents neurological defects associated with a chronic integrated stress response, making it a valuable tool for research in neurobiology and stress response mechanisms. Additionally, 2BAct demonstrates enhanced solubility and improved pharmacokinetic properties compared to the eIF2B activator ISRIB trans-isomer.
EIF2α Activator 2 is a potent activator of eukaryotic initiation factor 2 alpha (eIF2α) phosphorylation. It demonstrates significant antiproliferative activity, with IC50 values of 4.79 μM against K562 cells and 10.52 μM against peripheral blood mononuclear cells (PBMCs). This compound is primarily used in research focused on understanding the regulatory mechanisms of protein synthesis and cell proliferation.
Synonyms: ABBV-CLS-7262 THAM sodium
Fosigotifator THAM sodium is a potent activator of eukaryotic initiation factor 2B (EIF2B), enhancing its stability and function. This compound is capable of penetrating the blood-brain barrier and demonstrates efficacy in boosting EIF2B activity, particularly in scenarios involving pathogenic vanishing white matter (VWM) mutations. As an integrated stress response inhibitor, Fosigotifator THAM sodium serves as a valuable tool in research focused on amyotrophic lateral sclerosis and related neurodegenerative conditions.
Synonyms: ABBV-CLS-7262
Fosigotifator is an orally active activator of eukaryotic initiation factor 2B (eIF2B), known for its ability to penetrate the blood-brain barrier. By stabilizing the eIF2B complex, Fosigotifator enhances its activity, particularly in the context of pathogenic vanishing white matter (VWM) mutations. As an integrated stress response inhibitor (ISRI), this compound is valuable for research in neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS).
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1,3-Bis[3,5-bis(trifluoromethyl)phenyl]urea is a potent activator of the eIF2α kinase heme-regulated inhibitor. It effectively reduces the levels of the eIF2·GTP·tRNAiMet ternary complex, thereby modulating protein synthesis. This compound also demonstrates significant inhibitory effects on cancer cell proliferation, making it a valuable tool in cancer research and investigations into cellular stress responses.
