Open AccessDelta‐Like 4 Activates Notch 3 to Regulate Self‐Renewal in Skeletal Muscle Stem Cells
Author(s) -
Low SiewHui,
Barnes Josephine L.,
Zammit Peter S.,
Beauchamp Jonathan R.
Publication year - 2018
Publication title -
stem cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.159
H-Index - 229
eISSN - 1549-4918
pISSN - 1066-5099
DOI - 10.1002/stem.2757
Subject(s) - biology , myogenesis , notch signaling pathway , microbiology and biotechnology , c2c12 , stem cell , skeletal muscle , myocyte , gene knockdown , regeneration (biology) , signal transduction , anatomy , cell culture , genetics
Notch signaling is essential to maintain skeletal muscle stem cells in quiescence. However, the precise roles of different Notch receptors are incompletely defined. Here, we demonstrate a role for Notch3 (N3) in the self‐renewal of muscle stem cells. We found that N3 is active in quiescent C2C12 reserve cells (RCs), and N3 over‐expression and knockdown studies in C2C12 and primary satellite cells reveal a role in self‐renewal. The Notch ligand Delta‐like 4 (Dll4) is expressed by newly formed myotubes and interaction with this ligand is sufficient to maintain N3 activity in quiescent C2C12 RCs to prevent activation and progression into the cell cycle. Thus, our data suggest a model whereby during regeneration, expression of Dll4 by nascent muscle fibers triggers N3 signaling in associated muscle stem cells to recruit them to quiescence, thereby renewing the stem cell pool. S tem C ells 2018;36:458–466