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Research Paper|Volume 12, Issue 13|pp 13529—13554

Quantitative proteomics analysis of young and elderly skin with DIA mass spectrometry reveals new skin aging-related proteins

Jing Ma1,2, Mengting Liu1,2, Yaochi Wang1,2, Cong Xin1,2, Hui Zhang1,2, Shirui Chen1,2, Xiaodong Zheng1,2, Xuejun Zhang1,2, Fengli Xiao1,2,3, Sen Yang1,2
  • 1Department of Dermatology of First Affiliated Hospital, and Institute of Dermatology, Anhui Medical University, Hefei, Anhui, China
  • 2Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, Hefei, Anhui, China
  • 3The Center for Scientific Research of Anhui Medical University, Hefei, Anhui, China
Received: February 25, 2020Accepted: May 27, 2020Published: June 29, 2020
https://doi.org/10.18632/aging.103461

Copyright © 2020 Ma et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Skin aging is a specific manifestation of the physiological aging process that occurs in virtually all organisms. In this study, we used data independent acquisition mass spectrometry to perform a comparative analysis of protein expression in volar forearm skin samples from of 20 healthy young and elderly Chinese individuals. Our quantitative proteomic analysis identified a total of 95 differentially expressed proteins (DEPs) in aged skin compared to young skin. Enrichment analyses of these DEPs (57 upregulated and 38 downregulated proteins) based on the GO, KEGG, and KOG databases revealed functional clusters associated with immunity and inflammation, oxidative stress, biosynthesis and metabolism, proteases, cell proliferation, cell differentiation, and apoptosis. We also found that GAPDH, which was downregulated in aged skin samples, was the top hub gene in a protein-protein interaction network analysis. Some of the DEPs identified herein had been previously correlated with aging of the skin and other organs, while others may represent novel age-related entities. Our non-invasive proteomics analysis of human epidermal proteins may guide future research on skin aging to help develop treatments for age-related skin conditions and rejuvenation.