Cell growth signaling pathways

Cell growth signaling pathways represent complex networks of molecular interactions that govern fundamental cellular processes such as proliferation, growth, differentiation, and survival. These pathways are initiated by external stimuli, like growth factors, binding to specific receptors on the cell surface, triggering a cascade of intracellular biochemical events. Key pathways include PI3K/AKT/mTOR, RAS/RAF/MEK/ERK (MAPK), JAK/STAT, Wnt/β-catenin, Hedgehog, and Notch pathways, involving various components such as receptors, enzymes (kinases), G proteins, and transcription factors. While essential for normal development and tissue homeostasis, dysregulation or aberrant activation of these pathways is a hallmark of many diseases, most notably cancer. In cancer, mutations or overexpression of pathway components can lead to uncontrolled cell growth, evasion of apoptosis, and metastasis. Consequently, these pathways are critical therapeutic targets in oncology, with drugs designed to inhibit specific components (e.g., kinase inhibitors, receptor blockers) to halt tumor progression. However, targeting these fundamental pathways can lead to side effects in healthy cells and the development of drug resistance, necessitating the exploration of combination therapies.

Other names

Cell proliferation pathwaysGrowth factor signaling pathwaysSignal transduction pathways involved in growth

Drugs targeting cell growth signaling pathways typically act by inhibiting specific kinases (e.g., RAF, MEK, PI3K, AKT, mTOR), blocking the activation of growth factor receptors (e.g., EGFR), or disrupting downstream signaling cascades that promote cell proliferation and survival. Some therapies aim to restore programmed cell death (apoptosis) in cancer cells. These mechanisms collectively aim to interrupt the aberrant signals that drive uncontrolled cell growth and division.