Heparin and heparan sulfate-like glycosaminoglycans (HS-GAGs)

Heparin and heparan sulfate-like glycosaminoglycans (HS-GAGs) are complex, linear polysaccharides found on cell surfaces and within the extracellular matrix [2][4]. They are characterized by a high negative charge density due to extensive sulfation, which allows them to interact with a vast array of proteins, including coagulation factors, growth factors, and chemokines [3]. In clinical medicine, heparin and its low-molecular-weight derivatives are gold-standard anticoagulants that function by binding to antithrombin III, significantly accelerating the inactivation of thrombin and Factor Xa [1]. Beyond their role in hematology, HS-GAGs act as essential co-receptors in various cell signaling pathways and serve as primary attachment sites for numerous pathogens, including viruses like SARS-CoV-2 and Herpes Simplex Virus [3]. Their structural diversity and ubiquity make them critical regulators of physiological processes such as angiogenesis, wound healing, and the inflammatory response [2].

Other names

Heparan sulfateHeparinHSGlycosaminoglycansHeparan sulfate proteoglycan chainsHeparinoids

Drugs targeting these molecules primarily act by potentiating antithrombin III to accelerate the inhibition of coagulation factors like Thrombin (Factor IIa) and Factor Xa, or by competitively inhibiting the binding of endogenous ligands and pathogens to the glycosaminoglycan chains [1][3].