Abstract
Objective
Human blood plasma is a complex that communicates with most parts of the body and reflects the changes in the state of an organism. Identifying age-related biomarkers can help predict and monitor age-related physiological decline and diseases and identify new treatments for diseases.
Methods and Participants
In this study, TMT-LC-MS/MS was utilized to screen differentially expressed plasma proteins in 118 healthy adults of different ages. Participants were divided into three groups: 21–30 years of age (Young), 41–50 years of age (Middle) and ≥60 years of age (Old).
Results
The number of differentially expressed proteins in the comparisons of Young vs Middle, Middle vs Old and Young vs Old were 82, 22 and 99, respectively. These proteins were involved in numerous physiological processes, such as “negative regulation of smooth muscle cell proliferation” and “blood coagulation”. Moreover, when Young was compared with Middle or Old, “complement and coagulation cascades” was the top enriched pathway by KEGG pathway enrichment analysis. Functional phenotyping of the proteome demonstrated that the plasma proteomic profiles of young adults were strikingly dissimilar to those of the middle-aged or older adults.
Conclusions
The results of this study mapped the variation in the expression of plasma proteins and provided information about possible biomarkers/treatments for different age-related functional disorders.
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Acknowledgements
The authors thank all the participants in the present study.
Funding
This work was supported by National Natural Science Fund for Distinguish Young Scholars (No. 81525008); National Natural Science Foundation for Young Scientists of China (No. 81901271); Miao Pu project of Army Medical University (2017R016).
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R.X., C.X.G., X.Y.X. and Q.W.Y., designed the experiments, performed the statistical analyses and drafted the manuscript; C.M.D., J.C.H., G.Q.Y., J.J.Y., and Q.Z. performed the experiments. X.Y.X. and Q.W.Y., supervised throughout the study. All authors read and approved the final manuscript.
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The study complies with the current laws of the country in which it was performed.
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Conflict of interest
The authors declare no conflicts of interests.
Data availability
The datasets for this study have been deposited to the ProteomeXchange Consortium via the PRIDE partner repository with the dataset identifier PXD016199. Reviewer account details: Username: reviewer53396@ebi.ac.uk; Password: HpSbIf0s
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Xu, R., Gong, C.X., Duan, C.M. et al. Age-Dependent Changes in the Plasma Proteome of Healthy Adults. J Nutr Health Aging 24, 846–856 (2020). https://doi.org/10.1007/s12603-020-1392-6
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DOI: https://doi.org/10.1007/s12603-020-1392-6