Details
- Autor(en) / Beteiligte
- Titel
- Met and Cxcr4 cooperate to protect skeletal muscle stem cells against inflammation-induced damage during regeneration
- Ist Teil von
- eLife, 2021-08, Vol.10
- Ort / Verlag
- England: eLife Sciences Publications Ltd
- Erscheinungsjahr
- 2021
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Acute skeletal muscle injury is followed by an inflammatory response, removal of damaged tissue, and the generation of new muscle fibers by resident muscle stem cells, a process well characterized in murine injury models. Inflammatory cells are needed to remove the debris at the site of injury and provide signals that are beneficial for repair. However, they also release chemokines, reactive oxygen species, as well as enzymes for clearance of damaged cells and fibers, which muscle stem cells have to withstand in order to regenerate the muscle. We show here that MET and CXCR4 cooperate to protect muscle stem cells against the adverse environment encountered during muscle repair. This powerful cyto-protective role was revealed by the genetic ablation of Met and Cxcr4 in muscle stem cells of mice, which resulted in severe apoptosis during early stages of regeneration. TNFα neutralizing antibodies rescued the apoptosis, indicating that TNFα provides crucial cell-death signals during muscle repair that are counteracted by MET and CXCR4. We conclude that muscle stem cells require MET and CXCR4 to protect them against the harsh inflammatory environment encountered in an acute muscle injury.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 2050-084XeISSN: 2050-084XDOI: 10.7554/elife.57356Titel-ID: cdi_doaj_primary_oai_doaj_org_article_ee7880419f6c4b54acbc3f89d562f072
- Format
- –
- Schlagworte
- Animal models, Animals, Antibodies, Apoptosis, Cell culture, Cell death, Chemokines, Communication, cxcl12/cxcr4, CXCR4 protein, Cytokines, Developmental Biology, Hepatocyte Growth Factor - genetics, Hepatocyte Growth Factor - metabolism, hgf/met, Inflammation, Inflammation - physiopathology, Mice, Muscle Fibers, Skeletal - physiology, muscle stem cell, Muscle, Skeletal - physiology, Mutation, Neutrophils, Reactive oxygen species, Receptors, CXCR4 - genetics, Receptors, CXCR4 - metabolism, Regeneration, satellite cell, Skeletal muscle, skeletal muscle regeneration, Stem cell transplantation, Stem cells, Stem Cells - physiology, Tumor necrosis factor-α