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High-resolution myogenic lineage mapping by single-cell mass cytometry.
Ermelinda Porpiglia1,2,3, Nikolay Samusik2,4, Andrew Tri Van Ho1,2,3
1Blau Laboratory, Stanford University School of Medicine, Stanford, California 94305, USA.
Nature Cell Biology
|April 18, 2017
Summary
Researchers identified new markers (CD9 and CD104) to track muscle stem cells during regeneration. This advances understanding of muscle repair dynamics and potential treatments for muscle diseases.
Area of Science:
- Muscle biology and regeneration research.
- Stem cell dynamics and differentiation.
- Biotechnology applications in cell tracking.
Background:
- Muscle regeneration involves complex, time-dependent cell state changes.
- Existing tools lack the resolution to track myogenic progression in vivo.
- Understanding these dynamics is crucial for addressing muscle diseases and aging.
Purpose of the Study:
- To develop novel tools for resolving myogenic progression in vivo.
- To identify and isolate skeletal muscle stem and progenitor cells.
- To delineate the molecular signature of activated stem cells and their trajectory.
Main Methods:
- Utilized single-cell mass cytometry (CyTOF) for high-resolution cell analysis.
- Employed the X-shift algorithm and force-directed layout for data visualization.
- Identified cell surface markers CD9 and CD104 for prospective cell isolation.
Main Results:
- Discovered CD9 and CD104 as key markers for identifying muscle stem and progenitor cells in vivo.
- Defined the molecular signature of activated stem cells as CD44+/CD98+/MyoD+.
- Mapped the myogenic trajectory during skeletal muscle regeneration after injury.
Conclusions:
- This study provides novel insights into the dynamics of skeletal muscle regeneration.
- The identified markers and methods enable precise tracking of muscle stem cell populations.
- Findings lay the groundwork for investigating regulatory networks in muscle aging and disease.