Cell surface components

Cell surface components refer to the diverse set of molecules—including proteins, lipids, and carbohydrates—that reside on or are embedded within the plasma membrane of a cell [Alberts et al., 2002]. These components are vital for maintaining cellular integrity and facilitating communication between the cell and its external environment through processes like signal transduction, cell adhesion, and molecular transport [Lodish et al., 2000]. In pharmacology, cell surface proteins represent the most significant class of therapeutic targets, accounting for more than half of all FDA-approved drug targets, including G protein-coupled receptors (GPCRs), ion channels, and transporters [Santos et al., 2017]. While specific components like HER2 or the LDL receptor are discrete targets, the term "Cell surface components" is a broad descriptive category rather than a single target [NCBI MeSH]. Dysregulation of these surface molecules is a hallmark of various pathologies, particularly in oncology where they serve as antigens for monoclonal antibodies and CAR-T cell therapies [Scott et al., 2012]. Consequently, while the category is essential to drug discovery, therapeutic intervention requires the identification of specific molecular entities within this group to ensure efficacy and minimize off-target effects.

Other names

Cell surface moleculesCell surface markersMembrane-bound componentsPlasma membrane componentsSurface antigens

Drugs targeting cell surface components act through diverse mechanisms including competitive inhibition of receptors, modulation of ion channel conductance, stabilization of transporters, or induction of antibody-dependent cellular cytotoxicity (ADCC) [Santos et al., 2017; Scott et al., 2012].