Sulfated glycosaminoglycans (sGAGs)

Sulfated glycosaminoglycans (sGAGs) are complex, linear polysaccharides found on the surface of almost all animal cells and within the extracellular matrix, where they are typically covalently attached to core proteins to form proteoglycans (Gandhi & Mancera, 2008, Chemical Biology & Drug Design). These molecules, including heparan sulfate and chondroitin sulfate, are characterized by high negative charge density due to their sulfate and carboxyl groups, allowing them to interact with a vast array of ligands such as growth factors, chemokines, and morphogens (Vlodavsky et al., 2012, Matrix Biology). In the context of infectious diseases, sGAGs serve as critical attachment factors or co-receptors for numerous pathogens, including viruses like SARS-CoV-2, herpes simplex virus, and HIV, facilitating their concentration on the cell surface and subsequent entry (Clausen et al., 2020, Cell). Beyond infection, dysregulation of sGAG expression and their remodeling by enzymes like heparanase are heavily implicated in cancer metastasis, angiogenesis, and chronic inflammatory states (Hammond et al., 2014, FEBS Journal). Therapeutic strategies targeting sGAGs often utilize heparin mimetics to competitively block pathogen or growth factor binding, or small molecule inhibitors to prevent the enzymatic degradation of the glycocalyx in malignant tissues.

Other names

Heparan sulfateChondroitin sulfateDermatan sulfateKeratan sulfateCell surface glycosaminoglycansProteoglycan carbohydrate chainsGlycocalyx glycosaminoglycans

Competitive inhibition of protein-GAG interactions, enzymatic degradation of GAG chains via heparanase modulation, or direct neutralization of GAG negative charges to prevent pathogen attachment and signaling.