MAPK14 (p38α) is a stress-activated protein kinase that coordinates cellular responses to diverse stimuli including endotoxin, osmotic stress, and viral infection. It functions as a central hub in inflammatory signaling, activated by upstream kinases in response to lipopolysaccharide, UV irradiation, amino acid starvation, and ribosome collisions 12. MAPK14 regulates production of pro-inflammatory cytokines such as interleukin-1 and tumor necrosis factor, with selective inhibitors blocking this pathway 3. In microbial infection, Mycobacterium tuberculosis phosphorylates MAPK14 in T cells to suppress interferon-gamma production. MAPK14 has been implicated in multiple disease contexts, with therapeutic targeting showing promise in colorectal cancer and glioblastoma. Recent evidence suggests context-dependent roles: in NRAS-mutant melanoma, MAPK14 activation suppresses tumor growth, whereas in glioblastoma, ARNT-mediated p38α signaling promotes chemoresistance 45. Specialized p38α inhibitors with extended target residence times induce mitotic catastrophe in colorectal cancer cells 6. Multiple p38α inhibitors including losmapimod, doramapimod, and neflamapimod have entered clinical development, with several reaching late-stage trials for inflammatory and fibrotic diseases.