Multiple cell surface growth factor and cytokine receptors

Multiple cell surface growth factor and cytokine receptors represent a broad category of transmembrane proteins that facilitate communication between the extracellular environment and the cell interior. This group includes receptor tyrosine kinases (RTKs) such as EGFR and VEGFR, as well as cytokine receptors that signal through the JAK/STAT pathway (Lemmon & Schlessinger, 2010, Cell; Spangler et al., 2015, Annu Rev Biochem). These receptors are fundamental to physiological processes including cell growth, survival, and immune regulation (Ihle, 1995, Nature). In pathological states like cancer and autoimmune diseases, these receptors are frequently overexpressed or mutated, leading to aberrant signaling and disease progression (Gschwind et al., 2004, Nat Rev Cancer). Therapeutic agents, particularly multi-kinase inhibitors like sunitinib and sorafenib, are designed to target several of these receptors simultaneously to enhance efficacy and prevent resistance (Wilhelm et al., 2006, Nat Rev Drug Discov). However, the broad inhibition of these essential signaling hubs often results in significant clinical safety concerns, including cardiovascular and gastrointestinal toxicities (Force et al., 2007, J Clin Invest).

Other names

Cell surface receptorsGrowth factor receptorsCytokine receptorsTransmembrane signaling receptorsReceptor tyrosine kinases and cytokine receptors

Drugs targeting these receptors typically act as competitive inhibitors of ligand binding (monoclonal antibodies) or as small molecule inhibitors of the intracellular kinase domains (tyrosine kinase inhibitors), thereby blocking downstream signaling pathways such as MAPK/ERK, PI3K/Akt, and JAK/STAT.