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    Region-Specific Characterization of N-Glycans in the Striatum and Substantia Nigra of an Adult Rodent Brain


    Samal, Juhi and Saldova, Radka and Rudd, Pauline M. and Pandit, Abhay and O’Flaherty, Roisin (2020) Region-Specific Characterization of N-Glycans in the Striatum and Substantia Nigra of an Adult Rodent Brain. Analytical Chemistry, 92 (19). pp. 12842-12851. ISSN 0003-2700

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    Abstract

    N-glycan alterations in the nervous system can result in different neuropathological symptoms such as mental retardation, seizures, and epilepsy. Studies have reported the characterization of N-glycans in rodent brains, but there is a lack of spatial resolution as either the tissue samples were homogenized or specific proteins were selected for analysis of glycosylation. We hypothesize that region-specific resolution of N-glycans isolated from the striatum and substantia nigra (SN) can give an insight into the establishment and pathophysiological degeneration of neural circuitry in Parkinson’s disease. Specific objectives of the study include isolation of N-glycans from the rat striatum and SN; reproducibility, resolution, and relative quantitation of N-glycome using ultra-performance liquid chromatography (UPLC), weak anion exchange-UPLC, and lectin histochemistry. The total N-glycomes from the striatum and SN were characterized using database mining (GlycoStore), exoglycosidase digestions, and liquid chromatography-mass spectrometry. It revealed significant differences in complex and oligomannose type N-glycans, sialylation (mono-, di-, and tetra-), fucosylation (tri-, core, and outer arm), and galactosylation (di-, tri-, and tetra-) between striatum and SN N-glycans with the detection of phosphorylated N-glycans in SN which were not detected in the striatum. This study presents the most comprehensive comparative analysis of relative abundances of N-glycans in the striatum and SN of rodent brains, serving as a foundation for identifying “brain-type” glycans as biomarkers or therapeutic targets and their modulation in neurodegenerative disorders.

    Item Type: Article
    Keywords: Region-Specific; Characterization; N-Glycans; Striatum; Substantia Nigra; Adult Rodent; Brain;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Faculty of Science and Engineering > Research Institutes > Human Health Institute
    Item ID: 16173
    Identification Number: https://doi.org/10.1021/acs.analchem.0c01206
    Depositing User: Roisin O'Flaherty
    Date Deposited: 22 Jun 2022 08:01
    Journal or Publication Title: Analytical Chemistry
    Refereed: Yes
    URI:

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