Abstract
Alzheimer’s disease (AD) is the most common neurodegenerative disorder, and is caused by multiple pathological factors, such as the overproduction of β-amyloid (Aβ) and the hyperphosphorylation of tau. However, there is limited knowledge of the mechanisms underlying AD pathogenesis and no effective biomarker for the early diagnosis of this disorder. Thus in this study, a quantitative phosphoproteomics analysis was performed to evaluate global protein phosphorylation in the hippocampus of Aβ overexpressing APP/PS1 transgenic mice and tau overexpressing MAPT×P301S transgenic mice, two in vivo AD model systems. These animals, up to ten weeks old, do not exhibit cognitive dysfunctions and are widely used to simulate early-stage AD patients. The number of differentially phosphorylated proteins (DPPs) was greater for APP/PS1 transgenic mice than for MAPT×P301S transgenic mice. The function of the DPPs in APP/PS1 transgenic mice was mainly related to synapses, while the function of the DPPs in MAPT×P301S transgenic mice was mainly related to microtubules. In addition, an AD core network was established including seven phosphoproteins differentially expressed in both animal models, and the function of this core network was related to synapses and oxidative stress. The results of this study suggest that Aβ and tau induce different protein phosphorylation profiles in the early stage of AD, leading to the dysfunctions in synapses and microtubule, respectively. And the detection of same DPPs in these animal models might be used for early AD diagnosis.
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Data availability
The raw LC-MS data and supplemental information are available via the integrated Proteome Resources (https://www.iprox.cn//page/project.html?id=IPX0005949000).
Abbreviations
- AAK1:
-
ap2 associated protein kinase 1
- Aβ:
-
β-amyloid
- ADAM22:
-
disintegrin and metalloproteinase domain containing protein 22
- AD:
-
Alzheimer’s disease
- ADD2:
-
β-adducin 2
- ANK2:
-
ankyrin-2
- APBA1:
-
amyloid beta A4 precursor protein binding family a member 1
- BCA:
-
bicinchoninic acid
- BCR:
-
breakpoint cluster region protein
- BP:
-
biological process
- BSN:
-
bassoon
- CANX:
-
calnexin
- CAP2:
-
adenylyl cyclase-associated protein
- CC:
-
cellular components
- CDK5:
-
cyclin dependent kinase 5
- CFL1:
-
cofilin 1
- cGMP-PKG:
-
cyclic guanosine monophosphate- protein kinase G
- CSF:
-
cerebrospinal fluid
- CTNND2:
-
catenina δ-2
- DBN1:
-
drebrin 1
- DNM1:
-
dynamin-1
- DPPs:
-
differentially phosphorylated proteins
- DPYSL2:
-
dihydropyrimidinase-related protein 2
- ERK1/2:
-
extracellular regulated protein kinase 1/2
- FC:
-
fold change
- FDRs:
-
false discovery rates
- GIT1:
-
ARF GTPase-activating protein
- GO:
-
Gene Ontology
- GPM6A:
-
neuronal membrane glycoprotein M6-a
- GSK3β:
-
glycogen synthase kinase-3β
- HIST1H1B:
-
histone H1.5
- HSP90AA1:
-
heat shock protein 90-α
- INA:
-
α-internexin
- KCNA2:
-
potassium voltage-gated channel subfamily A member 2
- KEGG:
-
Kyoto Encyclopedia of Genes and Genomes
- MAP1A:
-
microtubule-associated protein 1 A
- MAP1B:
-
microtubule-associated protein 1B
- MAPK3:
-
mitogen-activated protein kinase 3
- MAP2:
-
microtubule-associated protein 2
- MAP7D1:
-
MAP7 domain-containing protein 1
- MAPT:
-
microtubule-associated protein tau
- MF:
-
molecular function
- nano-LC-MS/MS:
-
nanoscale liquid chromatography with tandem mass spectrometry
- NEFH:
-
neurofilament heavy polypeptide
- NF1:
-
neurofibromin
- NFTs:
-
neurofibrillary tangles
- NIH:
-
national Institutes of Health
- NLRP3:
-
Nucleotide-binding oligomerization domain, leucine- rich repeat and pyrin domain- containing 3
- NMDAR:
-
N-methyl-d-aspartic acid receptor
- OXR1:
-
oxidation resistance protein 1
- PACS1:
-
phosphofurin acidic cluster sorting protein 1
- PCA:
-
principal component analysis
- PLCB1:
-
1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase β-1
- PLXNC1:
-
plexin-C1
- PP1:
-
(phosphatase-1)
- PP2A:
-
protein phosphatase-2 A
- PP5:
-
protein phosphatase-5
- PPI:
-
protein-protein interaction
- PRKCE:
-
protein kinase C epsilon type
- PRKCG:
-
protein kinase C gamma type
- PSEN1:
-
presenilin 1
- RIMS1:
-
regulating synaptic membrane exocytosis protein 1
- RTN4:
-
reticulon 4
- SORT1:
-
sortilin 1
- SPNB2:
-
β-spectrin
- SRRM2:
-
serine/arginine repetitive matrix protein 2
- SYN2:
-
synapsin-2
- SYNJ1:
-
synaptojanin 1
- SV2A:
-
synaptic vesicle glycoprotein 2a
- TTBK1:
-
tau tubulin kinase 1
- UNC13A:
-
protein unc-13 homolog A
- VMAP2:
-
vesicle-associated membrane protein 2
- WT:
-
wild-type
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Acknowledgements
We would like to express our gratitude to all members of the College Student Innovation Team in Dr. Cui Wei’s Lab. We sincerely appreciate the technical supports by Dr. Majie Wang in Ningbo Kangning hospital, and by the Core Facilities and Laboratory Animal Center of Ningbo University, School of Medicine.
Funding
This work was supported by Natural Science Foundation of Zhejiang Province (LY21H090002), the National Natural Science Foundation of China (81870853, 82271443), Applied Research Project on Nonprofit Technology of Ningbo (20211JCGY020160), Major program of Ningbo Science and Technology Innovation 2025 (2019B10067, 2020Z093, 2021Z046), and the K. C. Wong Magna Fund in Ningbo University.
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Qiyao Wang: Conceptualization, Methodology, Formal analysis, Investigation, Data curation, Writing - original draft, and Writing - review & editing. Chenglong Xia: Investigation, Data curation. An Zhu: Investigation. Yongjie Bao: Investigation. Jiani Lu: Investigation. Yuan Chen: Investigation. Jiayi Xu: Investigation. Binbin Wang, Investigation. C. Benjamin Naman: Investigation, and Writing - review & editing. Liping Li: Investigation. Qinwen Wang: Investigation. Hao Liu: Investigation. Hongze Liang: Conceptualization, Writing - original draft, Writing - review & editing, Supervision, Funding acquisition. Wei Cui: Conceptualization, Writing - original draft, Writing - review & editing, Supervision, Funding acquisition.
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Wang, Q., Xia, C., Zhu, A. et al. Discrepancy of synaptic and microtubular protein phosphorylation in the hippocampus of APP/PS1 and MAPT×P301S transgenic mice at the early stage of Alzheimer’s disease. Metab Brain Dis 38, 1983–1997 (2023). https://doi.org/10.1007/s11011-023-01209-3
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DOI: https://doi.org/10.1007/s11011-023-01209-3