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Updated: Jun 28, 2025

Human Vastus Lateralis Skeletal Muscle Biopsy Using the Weil-Blakesley Conchotome
Published on: March 4, 2016
Human skeletal muscle aging atlas
Veronika R Kedlian1, Yaning Wang2,3, Tianliang Liu2,3
1Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK.
Abstract:
Skeletal muscle aging is a key contributor to age-related frailty and sarcopenia with substantial implications for global health. Here we profiled 90,902 single cells and 92,259 single nuclei from 17 donors to map the aging process in the adult human intercostal muscle, identifying cellular changes in each muscle compartment. We found that distinct subsets of muscle stem cells exhibit decreased ribosome biogenesis genes and increased CCL2 expression, causing different aging phenotypes. Our atlas also highlights an expansion of nuclei associated with the neuromuscular junction, which may reflect re-innervation, and outlines how the loss of fast-twitch myofibers is mitigated through regeneration and upregulation of fast-type markers in slow-twitch myofibers with age. Furthermore, we document the function of aging muscle microenvironment in immune cell attraction. Overall, we present a comprehensive human skeletal muscle aging resource ( https://www.muscleageingcellatlas.org/ ) together with an in-house mouse muscle atlas to study common features of muscle aging across species.
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