Galactose-terminated glycans

Galactose-terminated glycans, commonly known as asialoglycans, are carbohydrate motifs found on the surface of cell membranes, specifically on glycoproteins and glycolipids where the terminal sialic acid residue is absent [1]. These glycans serve as essential biological signals, most notably recognized by the asialoglycoprotein receptor (ASGPR) in the liver, which facilitates the clearance and degradation of desialylated proteins from the bloodstream [2]. In oncological contexts, the exposure of terminal galactose residues, such as the Thomsen-Friedenreich (TF) antigen, is a well-documented marker of malignant transformation and is heavily involved in tumor cell adhesion and metastasis [3]. Consequently, these glycans are targeted for both diagnostic imaging and therapeutic intervention, particularly through the use of monoclonal antibodies and lectins that bind specifically to these carbohydrate structures [4]. Furthermore, the high affinity of hepatic receptors for galactose-terminated structures has been exploited to develop targeted delivery systems for nucleic acids and small molecules, enhancing therapeutic efficacy while minimizing systemic toxicity [5].

Other names

AsialoglycansTerminal galactose residuesThomsen-Friedenreich antigen (TF antigen)Galactose-exposed glycansDesialylated glycans

Binding to terminal galactose residues to facilitate targeted cell lysis, inhibit metastatic adhesion, or mediate receptor-driven endocytosis.