Title
Sex differences in skeletal muscle-aging trajectory: same processes, but with a different ranking
Author
de Jong, J.C.B.C.
Attema, B.J.
van der Hoek, M.D.
Verschuren, L.
Caspers, M.P.M.
Kleemann, R.
van der Leij, F.R.
van den Hoek, A.M.
Nieuwenhuizen, A.G.
Keijer, J.
Publication year
2023
Abstract
Sex differences in muscle aging are poorly understood, but could be crucial for the optimization of sarcopenia-related interventions. To gain insight into potential sex differences in muscle aging, we recruited young (23 ± 2 years, 13 males and 13 females) and old (80 ± 3.5 years, 28 males and 26 females) participants. Males and females in both groups were highly matched, and vastus lateralis muscle parameters of old versus young participants were compared for each sex separately, focusing on gene expression. The overall gene expression profiles separated the sexes, but similar gene expression patterns separated old from young participants in males and females. Genes were indeed regulated in the same direction in both sexes during aging; however, the magnitude of differential expression was sex specific. In males, oxidative phosphorylation was the top-ranked differentially expressed process, and in females, this was cell growth mediated by AKT signaling. Findings from RNA-seq data were studied in greater detail using alternative approaches. In addition, we confirmed our data using publicly available data from three independent human studies. In conclusion, top-ranked pathways differ between males and females, but were present and altered in the same direction in both sexes. We conclude that the same processes are associated with skeletal muscle aging in males and females, but the differential expression of those processes in old vs. young participants is sex specific. (C) 2023, The Author(s).
Subject
AKT signaling
Frailty
Gender
Mitochondria
Myofiber type
Oxidative phosphorylation
To reference this document use:
http://resolver.tudelft.nl/uuid:3aa33b06-4fcc-47b1-8e9d-cdc056682902
DOI
https://doi.org/10.1007/s11357-023-00750-4
TNO identifier
982777
ISSN
2509-2715
Source
GeroScience, Epub 23 Feb
Document type
article