Intracellular signaling pathway for growth factor

The intracellular signaling pathway for growth factors refers collectively to the complex network by which extracellular signals from various growth factors—such as epidermal growth factor (EGF), fibroblast growth factors (FGF), transforming growth factors beta/alpha (TGF-β/TGF-α), platelet-derived growth factor (PDGF), insulin-like growth factors (IGF), hepatocyte-growth-factor/c-MET—are transmitted into cells via their respective receptors. These receptors typically activate intracellular cascades involving adaptor proteins and enzymes such as kinases. Key downstream effectors include RAS-MAP kinase cascades, PI3 kinase-AKT-mTOR axis, PLCγ-PKC-Ca²⁺ systems, STAT transcription factors among others. These pathways regulate fundamental cellular processes including cell proliferation, survival/apoptosis balance differentiation angiogenesis immune responses tissue repair wound healing embryogenesis organ development homeostasis maintenance tumorigenesis metastasis drug resistance etc. Because these networks integrate multiple inputs from different families they exhibit extensive crosstalk redundancy feedback loops context-dependent outcomes making them both powerful regulators physiology pathology attractive targets therapeutic intervention particularly oncology where aberrant activation drives malignant transformation progression treatment resistance. The term "intracellular signaling pathway for growth factor" does not refer to one molecule but rather encompasses all major signal transduction routes activated by various types/groups/families/superfamilies ligands binding cognate membrane-bound receptors triggering cytoplasmic/nuclear events ultimately controlling gene expression behavior fate cells tissues organs organisms health disease states.

Other names

Growth factor signal transduction pathwayGrowth factor receptor signaling cascadeGrowth factor-mediated intracellular signalingGrowth factor-regulated proliferation pathways

Inhibition of receptor tyrosine kinase activity or downstream kinases such as MEK and PI3K/AKT/mTOR to block cell proliferation and survival signals