Suppression of collagen Q expression in the extrajunctional regions of rat fast muscles is encoded in their stem cells (satellite cells)

► Muscle regeneration was used to study ColQ regulation in developing muscles. ► Extrajunctional ColQ mRNA levels are low in fast and high in slow regenerating muscle. ► Innervation slowly completely reduced ColQ mRNA levels in regenerating fast muscles. ► ColQ mRNA levels in fast muscles do not increase after tonic muscle activation. ► Low extrajunctional ColQ expression in fast muscles is encoded in their stem cells.