O-GlcNAc expression in developing and ageing mouse brain - PubMed (original) (raw)
Comparative Study
O-GlcNAc expression in developing and ageing mouse brain
M Rex-Mathes et al. Biochimie. 2001 Jul.
Abstract
In order to understand whether there is a specific role for the posttranslational N-acetylglucosamine modification linked O-glycosidically (O-GlcNAc) to serine and threonine residues of proteins during development and/or ageing of the brain, we investigated the O-GlcNAc expression of early postnatal cerebellar neurons as well as of mouse brain of different ages. In all cells either in culture or of cryosections mainly the nuclei and nuclear membranes were stained with an O-GlcNAc specific monoclonal antibody. In cerebellar neurons in culture the level of expression could be manipulated by directly interfering with either the biosynthesis of GlcNAc or the removal of O-GlcNAc from proteins confirming the dynamic nature of this protein modification. O-GlcNAc was ubiquitously expressed in mouse brains from embryonic day 10 until late adulthood with some variations in expression strength from cell to cell. In addition, no significant difference in O-GlcNAc expression of subcellular fractions from brains of mice which age at an accelerated rate could be detected compared to normal mice. Taken together these observations support the view that the O-GlcNAc modification has important functional roles for physiological processes of neural cell throughout development, in adulthood and ageing.
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