Cell membrane and associated signaling pathways

The cell membrane is a dynamic, semipermeable lipid bilayer that delineates the boundaries of every cell. It contains embedded and associated proteins, including receptors, channels, and enzymes, which serve as the primary machinery for cellular signal transduction—converting extracellular signals (such as hormones, cytokines, neurotransmitters) into intracellular responses. Signaling events at the membrane regulate critical cellular processes, including growth, division, differentiation, motility, immune detection, and programmed cell death. Key signal transduction pathways initiated at the membrane include those mediated by G protein-coupled receptors, ion channels, and enzyme-linked receptors (e.g., receptor tyrosine kinases). Lipid composition and membrane fluidity profoundly influence the behavior of these signaling complexes. Defects, mutations, or dysregulation in membrane-associated signaling pathways are critical drivers in a wide range of diseases, notably cancer, autoimmune disorders, and neurologic conditions[1][2][3][4][5][6][7][8]. Because "cell membrane and associated signaling pathways" collectively refers to a diverse set of molecular systems, it cannot serve as a specific therapeutic target entry in a structured database. Individual membrane proteins or signaling complexes should be specified instead, such as "Epidermal growth factor receptor" or "Nicotinic acetylcholine receptor".

Other names

Plasma membranelipid bilayercell surface receptorssignaling complexes