Human brain glycoproteomic network alterations in Alzheimer’s disease

We performed a large-scale, site-specific N-glycoproteome profiling study of human Alzheimer’s disease (AD) and control brains using mass spectrometry–based quantitative N-glycoproteomics. The study provided a system-level view of human brain N-glycoproteins and in vivo N-glycosylation sites and identified disease signatures of altered N-glycopeptides, N-glycoproteins, and N-glycosylation site occupancy in AD. Glycoproteomic data-driven network analysis showed 13 modules of co-regulated N-glycopeptides/glycoproteins, 6 of which are associated with AD phenotypes.