Interruption of Ganglioside Synthesis Produces Central Nervous System Degeneration and Altered Axon-glial Interactions
Overview
Authors
Affiliations
Gangliosides, which are sialylated glycosphingolipids, are the major class of glycoconjugates on neurons and carry the majority of the sialic acid within the central nervous system (CNS). To determine the role of ganglioside synthesis within the CNS, mice carrying null mutations in two critical ganglioside-specific glycosyltransferase genes, Siat9 (encoding GM3 synthase) and Galgt1 (encoding GM2 synthase), were generated. These double-null mice were unable to synthesize gangliosides of the ganglio-series of glycosphingolipids, which are the major ganglioside class in the CNS. Soon after weaning, viable mice developed a severe neurodegenerative disease that resulted in death. Histopathological examination revealed striking vacuolar pathology in the white matter regions of the CNS with axonal degeneration and perturbed axon-glia interactions. These results indicate that ganglioside synthesis is essential for the development of a stable CNS, possibly by means of the promotion of interactions between axon and glia.
Tot O, Mrdenovic S, Ivic V, Roncevic R, Milic J, Viljetic B Curr Issues Mol Biol. 2024; 46(8):8376-8394.
PMID: 39194711 PMC: 11352286. DOI: 10.3390/cimb46080494.
Depletion of b-series ganglioside prevents limb length discrepancy after growth plate injury.
Hosokawa Y, Matsuoka M, Sakai Y, Fukuda R, Matsugasaki K, Homan K BMC Musculoskelet Disord. 2024; 25(1):565.
PMID: 39033138 PMC: 11264953. DOI: 10.1186/s12891-024-07704-7.
Schindler R, Oloumi A, Tena J, Alvarez M, Liu Y, Grijaldo S Anal Chem. 2024; 96(15):5951-5959.
PMID: 38563595 PMC: 11024888. DOI: 10.1021/acs.analchem.4c00077.
Lipid Rafts: The Maestros of Normal Brain Development.
Viljetic B, Blazetic S, Labak I, Ivic V, Zjalic M, Heffer M Biomolecules. 2024; 14(3).
PMID: 38540780 PMC: 10967752. DOI: 10.3390/biom14030362.
Dookwah M, Wagner S, Ishihara M, Yu S, Ulrichs H, Kulik M Hum Mol Genet. 2023; 32(24):3323-3341.
PMID: 37676252 PMC: 10695682. DOI: 10.1093/hmg/ddad146.