Mitogen-activated protein kinase pathways and Akt (Protein kinase B) (MAPK/Akt)

The Mitogen-Activated Protein Kinase (MAPK) pathways and Akt (Protein Kinase B) are fundamental intracellular signaling networks that coordinate cellular responses to extracellular stimuli such as growth factors, cytokines, and stress (Source: NIH/NCBI). The MAPK pathways, including the ERK, JNK, and p38 cascades, primarily regulate cell proliferation, differentiation, and stress responses through a series of phosphorylation events (Source: StatPearls). Akt is the central effector of the PI3K/Akt/mTOR pathway, playing a pivotal role in promoting cell survival, inhibiting apoptosis, and regulating glucose metabolism (Source: UniProt). Aberrant activation of these pathways is a primary driver in various malignancies, where mutations in upstream components like Ras, Raf, or PI3K lead to constitutive signaling and tumor progression (Source: PubMed). Because of the significant crosstalk and reciprocal feedback loops between MAPK and Akt signaling, therapeutic strategies often involve dual targeting to prevent the emergence of resistance in clinical settings (Source: Nature Reviews Drug Discovery). Drugs targeting these pathways include MEK inhibitors like trametinib and Akt inhibitors like capivasertib, which are often used in combination to achieve more durable responses in cancer patients. Beyond oncology, these pathways are also implicated in inflammatory diseases and metabolic disorders, making them versatile targets for drug development.

Other names

MAPK/ERK and PI3K/Akt pathwaysRas-Raf-MEK-ERK and PI3K-Akt-mTOR signalingMitogen-activated protein kinase and Protein kinase BMAPK and Akt signaling cascades

Inhibition of specific kinase components (e.g., BRAF, MEK, Akt) within the signaling cascades to prevent phosphorylation of downstream substrates and inhibit pro-survival/pro-proliferative gene expression.