Cellular membrane and membrane-associated receptors

Cellular membranes are dynamic phospholipid bilayers that serve as the fundamental structural boundary of the cell, facilitating compartmentalization and selective permeability. Embedded within or associated with these membranes are a diverse array of proteins, including G protein-coupled receptors (GPCRs), ion channels, and transporters, which collectively represent the most significant class of therapeutic targets in modern medicine (Overington et al., 2006). These membrane-associated receptors are responsible for sensing extracellular signals and transducing them into intracellular responses, regulating vital processes such as growth, metabolism, and neurotransmission (Alberts et al., 2002). In many diseases, such as cancer and autoimmune disorders, these proteins are often overexpressed or mutated, leading to aberrant signaling pathways (Santos et al., 2017). Consequently, they are targeted by a wide range of drugs, including small molecule inhibitors and monoclonal antibodies, which modulate their activity to restore physiological balance. The accessibility of these targets on the cell surface makes them particularly attractive for drug development, though challenges remain regarding specificity and the maintenance of membrane integrity.

Other names

Plasma membraneBiological membraneCell surface receptorsIntegral membrane proteinsTransmembrane proteinsSurfaceome

Drugs targeting membrane-associated receptors typically function through agonism or antagonism of signaling pathways, inhibition of enzymatic activity, or the blocking of ion and molecule transport across the lipid bilayer (Santos et al., 2017; Alberts et al., 2002).