Global quantitative analysis of the human brain proteome and phosphoproteome in Alzheimer’s disease
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Abstract
Alzheimer’s disease (AD) is characterized by an early, asymptomatic phase (AsymAD) in which individuals exhibit amyloid-beta (Aβ) plaque accumulation in the absence of clinically detectable cognitive decline. Here we report an unbiased multiplex quantitative proteomic and phosphoproteomic analysis using tandem mass tag (TMT) isobaric labeling of human post-mortem cortex ( n = 27) across pathology-free controls, AsymAD and symptomatic AD individuals. With off-line high-pH fractionation and liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) on an Orbitrap Lumos mass spectrometer, we identified 11,378 protein groups across three TMT 11-plex batches. Immobilized metal affinity chromatography (IMAC) was used to enrich for phosphopeptides from the same TMT-labeled cases and 51,736 phosphopeptides were identified. Of these, 48,992 were quantified by TMT reporter ions representing 33,652 unique phosphosites. Two reference standards in each TMT 11-plex were included to assess intra- and inter-batch variance at the protein and peptide level. This comprehensive human brain proteome and phosphoproteome dataset will serve as a valuable resource for the identification of biochemical, cellular and signaling pathways altered during AD progression.
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Proteomic approaches have revealed dysregulation in synaptic proteins, immune modulators, and metabolic enzymes that extend beyond the classical amyloid and tau pathways.
“These approaches have revealed dysregulation in synaptic proteins, immune modulators, and metabolic enzymes that extend beyond the classical amyloid and tau pathways134,160,170, 171, 172, 173.”
From Artificial intelligence-driven multi-omics approaches in Alzheimer's disease: Progress, challenges, and future directions (2025) · cites this paper as [134]
The Usage Notes (‘AD stage-specific differential protein expression’; page not provided) report substantial peptide-level differences between Alzheimer’s disease and controls, beyond the paper’s separate measurements of amyloid and tau. The passages do not identify the altered proteins as synaptic proteins, immune modulators, or metabolic enzymes, so those specific parts of the claim are not supported by this copy. (LLM, conf=0.82)
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Self-citation
- Authors
- Ping, L., Kundinger, S. R., Duong, D. M., Yin, L., Gearing, M., Lah, J. J., Levey, A. I., & Seyfried, N. T.
- Affiliations
- Emory University (US)
- Corresponding author
- Seyfried, Nicholas T.
- ORCID
- Venue
- Scientific Data
- Published
- 2020-09-28
- Volume
- 7
- Issue
- 1
- Pages
- 315-315
- ISSN
- 2052-4463 (ISSN-L)
- PMC
- PMC7522715
- OpenAlex
- W3088072832
- Cited by
- 127
- References
- 8
- Citations by year
- 2026: 21 · 2025: 22 · 2024: 17 · 2023: 30 · 2022: 20 · 2021: 12 · 2020: 4
- Type
- data paper
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Data (publishedVersion, cc-by)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- Emory University (R01AG061800, RF1AG057471, R01AG053960, P50AG025688, U01AG061357, R01AG057339, RF1AG057470)
- Alzheimer's Disease Research Center, Emory University (P50 AG025688)
- National Institute on Aging (RF1AG057470, U01AG061357, RF1AG062181, U01AG046161, RF1AG057471, P50AG025688, R01AG057339, R01AG053960, R01AG061800)
- Topics
- Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Keywords
- Alzheimer's disease, human brain proteome, amyloid plaques, phosphopeptides, phosphosites, protein quantification, disease progression
- MeSH terms
- Alzheimer Disease, Brain, Chromatography, Liquid, Humans, Phosphoproteins, Proteome, Tandem Mass Spectrometry
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