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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

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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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Authors and Affiliations

Authors

Contributions

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.

Corresponding authors

Correspondence to Hongze Liang or Wei Cui.

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Competing interests

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Ethics approval

All procedures in our animal experiments were approved by the Animal Ethics and Welfare Committee of Ningbo University (SYXK-2019-0005).

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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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