In situ spatial glycomic imaging of mouse and human Alzheimer's disease brains.
IF: 16.655
Cited by: 19


N-linked protein glycosylation in the brain is an understudied facet of glucose utilization that impacts a myriad of cellular processes including resting membrane potential, axon firing, and synaptic vesicle trafficking. Currently, a spatial map of N-linked glycans within the normal and Alzheimer's disease (AD) human brain does not exist. A comprehensive analysis of the spatial N-linked glycome would improve our understanding of brain energy metabolism, linking metabolism to signaling events perturbed during AD progression, and could illuminate new therapeutic strategies. Herein we report an optimized in situ workflow for enzyme-assisted, matrix-assisted laser desorption and ionization (MALDI) mass spectrometry imaging (MSI) of brain N-linked glycans. Using this workflow, we spatially interrogated N-linked glycan heterogeneity in both mouse and human AD brains and their respective age-matched controls. We identified robust regional-specific N-linked glycan changes associated with AD in mice and humans. These data suggest that N-linked glycan dysregulation could be an underpinning of AD pathologies.


MALDI imaging
N-linked glycosylation
carbohydrate metabolism
neuronal function
synaptic transmission

MeSH terms

Alzheimer Disease
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization


Hawkinson, Tara R
Clarke, Harrison A
Young, Lyndsay E A
Conroy, Lindsey R
Markussen, Kia H
Kerch, Kayla M
Johnson, Lance A
Nelson, Peter T
Wang, Chi
Allison, Derek B
Gentry, Matthew S
Sun, Ramon C

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