BACH1 (BTB domain and CNC homolog 1) is a redox-sensitive transcription factor that functions as both a repressor and activator depending on cellular context. It binds to NF-E2 DNA binding sites and acts as a heme-binding protein whose stability is inversely regulated by oxidative stress 1. Under reduced ROS conditions, BACH1 stabilization promotes metabolic reprogramming toward glycolysis and mitochondrial dysfunction, which facilitates cancer progression 23. In cancer biology, BACH1 demonstrates pleiotropic pro-tumoral functions. It stimulates angiogenesis gene expression in a HIF1α-independent manner 4 and promotes ferroptosis resistance by competing with NRF2 to suppress ferroptosis-regulatory pathways 5. In glioblastoma, BACH1 activity increases in infiltrating tumor cells, and combined BACH1 and AP-1 inhibition synergistically suppresses progression 6. Beyond cancer, BACH1 functions as a mechanosensor of hemodynamic stress in endothelial cells. It forms a transcriptional complex with YAP to upregulate adhesion molecules and proinflammatory cytokines, promoting atherosclerotic lesion formation 7. In hepatic metabolism, BACH1 suppresses insulin signaling by facilitating PTP1B-mediated inhibition of the insulin receptor, contributing to insulin resistance and metabolic syndrome 8. BACH1 thus emerges as a multifaceted therapeutic target across multiple disease contexts.