Rac1–PAK1–p38 mitogen-activated protein kinase signaling pathway

The Rac1–PAK1–p38 MAPK signaling pathway is a key intracellular cascade that transmits signals from extracellular stimuli to downstream cellular responses. Rac1, a member of the Rho family of small GTPases, activates PAK1, a serine/threonine kinase, which in turn can activate the p38 MAPK subfamily. This pathway regulates diverse processes including cell proliferation, apoptosis, inflammation, cell cycle progression, and gene expression. Upstream and downstream effectors integrate environmental and genetic cues, making the pathway central to normal cell biology and numerous diseases, especially cancer and inflammatory conditions. The individual molecules within the pathway (Rac1, PAK1, p38 MAPKs) are considered drug targets, but the pathway itself is not a single canonical target[1][2][3][4].

Other names

Rac1–PAK/p38 MAPK pathwayRac1–PAK1–p38 signaling axisRac1–PAK1–p38 MAPK cascade

Inhibition of kinase activity (blocks signal transduction downstream of Rac1, PAK1, or p38[1]); Modulation of GTPase activity (for Rac1)