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Assessing Muscle Stem Cell Clonal Complexity During Aging
Changes in muscle stem cell (MuSC) function during aging have been assessed using various in vivo and ex vivo systems. However, changes in clonal complexity within the aged MuSC pool are relatively understudied. Although the dissection of stem cell heterogeneity has greatly benefited from several technological advancements, including single cell sequencing, these methods preclude longitudinal measures of individual stem cell behavior. Instead, multicolor labeling systems enable lineage tracing with single cell resolution. Here, we describe a method of inducibly labeling MuSCs with the Brainbow-2.1 multicolor lineage tracing reporter in vivo to track individual MuSC fate and assess clonal complexity in the overall MuSC pool throughout the mouse lifespan.
KeywordsAging Brainbow Clonal complexity Multicolor lineage tracing Satellite cell Skeletal muscle
This work was supported by NIH grant R01 AR064873 (to A.S.), NIH grant F31 AR065923 (to M.T.T.), and NIH grant F32 AR070630 (to M.J.S.). We thank Leslie Boyd, Buddy Charbono, and the Cell Imaging and Animal Core Facilities at SBPMDI for technical support.
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