Mitogen-activated protein kinase pathway components (MAPK pathway)

The Mitogen-Activated Protein Kinase (MAPK) pathway is a fundamental signal transduction cascade that translates extracellular stimuli, such as growth factors and cytokines, into specific cellular responses (NIH). It typically operates through a three-tiered kinase module consisting of a MAP kinase kinase kinase (MAP3K/RAF), a MAP kinase kinase (MAP2K/MEK), and a MAP kinase (MAPK/ERK) (Abcam). This pathway regulates critical processes including cell growth, proliferation, differentiation, and survival (Wikipedia). Dysregulation of the MAPK pathway, often driven by oncogenic mutations in genes like BRAF or KRAS, is a major driver of tumorigenesis in various cancers, including melanoma and colorectal cancer (MDPI). Therapeutic strategies focus on small-molecule inhibitors targeting specific components like BRAF and MEK, which have significantly improved outcomes in mutation-positive patients (PubMed). However, clinical utility is frequently challenged by the rapid emergence of resistance through bypass signaling and paradoxical pathway activation in non-mutated cells (StatPearls).

Other names

Ras-Raf-MEK-ERK pathwayMAPK signaling cascadeERK pathwayMitogen-activated protein kinase signaling pathwayMAP kinase signaling toolkit

Inhibition of specific kinase components (e.g., BRAF, MEK, or ERK) within the signaling cascade to block downstream phosphorylation and nuclear translocation of transcription factors.