4-Octyl Itaconate

4-Octyl Itaconate is a cell-permeable itaconate derivative and prodrug form intended for immunometabolism and lead compound research. It can be hydrolyzed by esterases intracellularly to release the endogenous metabolite itaconate (a metabolite derived from the IRG1-catalyzed cis-aconitate decarboxylation pathway), thereby acting as an electrophilic molecule to regulate signaling related to inflammation and oxidative stress; it has been reported to promote Nrf2 stabilization and transcriptional activation of downstream antioxidant response genes through covalent alkylation of KEAP1, and to inhibit STING phosphorylation events to affect innate immune pathways. In in vitro studies, 4-Octyl Itaconate often exhibits quantifiable modulatory activity on macrophage function and pro-inflammatory mediator production in the low micromolar to mid-micromolar range, with effective concentrations influenced by cell type, stimulation conditions, and readout indicators; in cellular models, it is commonly used in human macrophage and peripheral blood mononuclear cell systems to elucidate the causal relationships and temporal dynamics of the KEAP1–Nrf2 and STING axes; in animal models and pharmacodynamic exploration, it is often used as a chemical probe to assess signaling pathway changes under conditions of disrupted immune homeostasis and systemic inflammation induction; in drug discovery settings, it can serve as a tool molecule for hit validation and mechanism-of-action elucidation, supporting pathway selection, target confirmation, and phenotypic screening, while the specific concentrations or doses used in experiments generally depend on the research objective and experimental design.