Cell surface and extracellular matrix negatively charged components

Cell surface and extracellular matrix (ECM) negatively charged components represent a broad class of polyanionic molecules, including glycosaminoglycans (GAGs) such as heparan sulfate and chondroitin sulfate, as well as sialic acid-rich glycoproteins (Morla, 2019). These components constitute the glycocalyx and the structural scaffold of the ECM, serving vital roles in regulating cell-cell interactions, growth factor signaling, and maintaining the physical barrier of the cell membrane (Varki, 2017). In pathological states, alterations in the sulfation patterns or density of these molecules can promote tumor cell invasion, facilitate viral and bacterial attachment, and modulate inflammatory responses (Poole et al., 2018). Therapeutic strategies targeting these components often utilize cationic molecules, such as polymyxins or protamine, which bind via electrostatic interactions to neutralize charge or disrupt membrane integrity (Trimble et al., 2018). While effective, the lack of high specificity for diseased versus healthy tissue often leads to safety concerns like nephrotoxicity. Consequently, these components are increasingly studied as targets for site-specific drug delivery and the development of glycomimetic drugs (Morla, 2019).

Other names

Cell surface polyanionsAnionic glycocalyxNegatively charged cell surfaceExtracellular matrix glycosaminoglycansAnionic surface componentsPericellular matrix polyanions

Electrostatic binding to anionic groups such as sulfate, carboxylate, or phosphate moieties on the cell surface or within the extracellular matrix, leading to charge neutralization, competitive inhibition of ligand-receptor interactions, or physical disruption of the lipid bilayer (Trimble et al., 2018; Morla, 2019).