Host sialylated glycan receptors

Host sialylated glycan receptors are terminal carbohydrate structures, typically N-acetylneuraminic acid (Neu5Ac), found on the surface of glycoproteins and glycolipids of mammalian cells (Varki, A. 2008, Trends in Molecular Medicine). These receptors play a fundamental role in biological processes such as cell-cell recognition, immune response modulation via Siglecs, and stabilization of protein conformations (Crocker, P. R., et al. 2007, Nature Reviews Immunology). In the context of infectious diseases, they serve as the primary attachment points for numerous pathogens, including influenza viruses, parainfluenza viruses, and certain coronaviruses (Skehel, J. J., & Wiley, D. C. 2000, Annual Review of Biochemistry). The specificity of the linkage between sialic acid and the underlying galactose (e.g., alpha 2-3 or alpha 2-6) often determines host range and tissue tropism for respiratory viruses. Therapeutic interventions targeting these receptors include sialidases like DAS181, which enzymatically remove the sialic acid residues to prevent viral entry, and glycomimetics that compete for viral binding sites (Moss, R. B., et al. 2012, Expert Opinion on Investigational Drugs). Because of their ubiquitous nature, targeting these receptors requires careful consideration of potential impacts on normal cellular signaling and immune homeostasis.

Other names

Sialic acid receptorsSialoglycansSialylated glycoconjugatesNeu5Ac receptorsSialic acid-containing glycansHost cell sialic acids

Enzymatic cleavage of terminal sialic acid residues from host cell surfaces to prevent viral attachment and entry; competitive inhibition of viral hemagglutinin binding to host glycans.