Mitogen-activated protein kinase 14 (p38α) (MAPK14)

Mitogen-activated protein kinase 14 (MAPK14), commonly referred to as p38α, is a member of the p38 mitogen-activated protein kinase family that acts as a critical integrator of cellular stress signals [UniProt: P47811]. It is activated by a variety of environmental stimuli, including osmotic stress, inflammatory cytokines, and lipopolysaccharides, leading to the phosphorylation of numerous downstream transcription factors and kinases [PMID: 10485906]. This signaling cascade is essential for the production of pro-inflammatory cytokines such as TNF-α and IL-1β, making p38α a central player in the pathogenesis of chronic inflammatory diseases like rheumatoid arthritis and COPD [PMID: 25613372]. In addition to inflammation, p38α is involved in regulating cell cycle progression, apoptosis, and differentiation, which links its dysregulation to various cancers and neurodegenerative conditions [PMID: 16424881]. Pharmacological targeting of p38α has primarily focused on small-molecule inhibitors that compete with ATP or bind to allosteric sites to block its catalytic activity [PMID: 18448147]. While many inhibitors have demonstrated potent anti-inflammatory effects in preclinical models, their clinical utility has been limited by systemic toxicities and the activation of alternative pathways that bypass the inhibition [PMID: 19151665].

Other names

p38 alphaMAP kinase p38αSAPK2ACSBPRKMXI2Cytokine suppressive anti-inflammatory drug-binding proteinStress-activated protein kinase 2aCSBP1CSBP2PRKM14PRKM15

ATP-competitive kinase inhibition; Allosteric kinase inhibition; Reduction of pro-inflammatory cytokine biosynthesis [PMID: 10485906, PMID: 18448147].