Gangliotetraosylceramide (Asialo-GM1) (GA1)

Asialo-GM1, chemically known as gangliotetraosylceramide or GA1, is a neutral glycosphingolipid and a member of the ganglioside family that lacks the sialic acid residues found in GM1. It is predominantly expressed on the cell surface of natural killer (NK) cells, certain subsets of T lymphocytes, basophils, and fetal thymocytes, where it serves as a distinctive immunological marker [5]. In the central and peripheral nervous systems, it is localized in myelin and is involved in modulating neuronal plasticity, repair mechanisms, and the release of neurotrophins [1, 3]. Asialo-GM1 plays a significant role in human disease as a primary receptor for bacterial toxins, such as those produced by Cholera and E. coli, and as an adhesion site for pathogens like Pseudomonas aeruginosa [1]. It is also a critical target for pathogenic autoantibodies in various autoimmune peripheral neuropathies, including multifocal motor neuropathy and Guillain-Barré syndrome [6, 9]. In pharmacological and immunological research, anti-asialo-GM1 antibodies are standard tools used to selectively deplete NK cell populations in vivo to investigate their role in tumor surveillance and infectious disease models [5].

Other names

Asialo-GM1Asialo-GM1 gangliosideGA1Ganglio-N-tetraosylceramideGgOse4CerNeutral glycosphingolipid

Targeted depletion of natural killer (NK) cells and certain T cells via antibody-dependent cellular cytotoxicity (ADCC) or complement-mediated lysis; competitive binding site for bacterial toxins and pathogen adhesins.