| First Author | Scott RW | Year | 2019 |
| Journal | Cell Stem Cell | Volume | 25 |
| Issue | 6 | Pages | 797-813.e9 |
| PubMed ID | 31809738 | Mgi Jnum | J:292396 |
| Mgi Id | MGI:6449010 | Doi | 10.1016/j.stem.2019.11.004 |
| Citation | Scott RW, et al. (2019) Hic1 Defines Quiescent Mesenchymal Progenitor Subpopulations with Distinct Functions and Fates in Skeletal Muscle Regeneration. Cell Stem Cell 25(6):797-813.e9 |
| abstractText | Many adult tissues contain resident stem cells, such as the Pax7(+) satellite cells within skeletal muscle, that regenerate parenchymal elements following damage. Tissue-resident mesenchymal progenitors (MPs) also participate in regeneration, although their function and fate in this process are unclear. Here, we identify Hypermethylated in cancer 1 (Hic1) as a marker of MPs in skeletal muscle and further show that Hic1 deletion leads to MP hyperplasia. Single-cell RNA-seq and ATAC-seq analysis of Hic1(+) MPs in skeletal muscle shows multiple subpopulations, which we further show have distinct functions and lineage potential. Hic1(+) MPs orchestrate multiple aspects of skeletal muscle regeneration by providing stage-specific immunomodulation and trophic and mechanical support. During muscle regeneration, Hic1(+) derivatives directly contribute to several mesenchymal compartments including Col22a1-expressing cells within the myotendinous junction. Collectively, these findings demonstrate that HIC1 regulates MP quiescence and identifies MP subpopulations with transient and enduring roles in muscle regeneration. |
