SFXN1激活剂

NFκB p65 activators belong to a class of chemical compounds known for their ability to modulate the nuclear factor kappa-light-chain-enhancer of activated B cells (NFκB) pathway, specifically targeting the p65 subunit. NFκB is a transcription factor that plays a pivotal role in the regulation of genes involved in immune responses, inflammation, cell survival, and proliferation. The p65 subunit, also referred to as RelA, is a critical component of the NFκB complex and is central to its activation. NFκB p65 activators are a diverse group of molecules that can trigger the activation of NFκB signaling by various mechanisms, primarily influencing the phosphorylation and degradation of inhibitory proteins called IκB (inhibitor of κB).

These activators can be broadly categorized into exogenous ligands and endogenous cellular factors. Exogenous NFκB p65 activators include microbial products like lipopolysaccharide (LPS), which activates NFκB via Toll-like receptor (TLR) signaling, and phorbol esters like phorbol 12-myristate 13-acetate (PMA), which activate protein kinase C (PKC) and subsequently the NFκB pathway. Reactive oxygen species (ROS), such as hydrogen peroxide (H2O2), also act as activators by inducing oxidative stress, leading to NFκB activation. On the other hand, endogenous NFκB p65 activators involve cytokines like tumor necrosis factor-alpha (TNF-α) and interleukin-1β (IL-1β), which bind to their respective receptors, triggering downstream signaling cascades that result in the phosphorylation and subsequent degradation of the inhibitory IκB proteins. Furthermore, cellular stressors like ceramide contribute to NFκB p65 activation through various pathways, including the activation of PKC and stress-activated protein kinases (SAPKs), culminating in IκB degradation. Overall, NFκB p65 activators represent a diverse set of compounds that exert their influence on this critical transcription factor, playing a pivotal role in regulating cellular responses to a wide range of stimuli.