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Identifying Quiescent Satellite Cells: A Scoping...
Journal article

Identifying Quiescent Satellite Cells: A Scoping Review of Transcriptomic Markers and Limitations

Abstract

Skeletal muscle regeneration relies on the resident stem cell population, termed satellite cells. Mechanistically, understanding the quiescence and activation dynamics of muscle satellite cells are essential for regenerative therapies and emerging applications such as cellular agriculture. Quiescent satellite cells (QSCs) are typically identified by expression of PAX7 and functional characteristics including a lack of proliferation. However, with the rapidly growing body of transcriptomic data, there is a lack of consensus regarding what markers can be used to identify quiescent satellite cells across transcriptomic studies. The purpose of this review was to evaluate the transcripts currently used to identify QSCs using transcriptomics and to establish an evidence-based foundation that could be used for future analyses. After surveying published single-cell transcriptomic studies, we identified Pax7 and/or Myf5 as the most used markers of general satellite cell identity, while Spry1, Cd34, and Calcr, together with the absence of Myod1, Mki67, and Cdk1 were most commonly used to identify QSC clusters in murine studies. In contrast, there is currently insufficient literature to make a confident conclusion on quiescence markers in larger mammals, including humans, pigs, and cattle. We also highlight the conceptual and technical challenges associated with transcriptomic analysis of satellite cell subpopulations, including continuum-based cell states, isolation induced transcriptional changes, and inconsistent terminology. As a field, greater consistency in language, standardized analyses, and cross-species validation will be required to progress the study of satellite cell quiescence and its translational utility.

Authors

Syroid AL; Steele AP; Murach KA; Hawke TJ

Journal

American Journal of Physiology-Cell Physiology, , ,

Publisher

American Physiological Society

Publication Date

May 6, 2026

DOI

10.1152/ajpcell.00101.2026

ISSN

0363-6143

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