Evidence |
Another myonuclear cluster was labeled Cluster MTJ, as the myonuclei in this cluster selectively express Col22a1, a transcript that encodes a member of the collagen family that contributes to the stabilization of myotendinous junctions (MTJ) and strengthens skeletal muscle attachments during contraction. Additionally, a subset of genes expressed in the NMJ and MTJ clusters is also highly expressed in the nuclei of other mononucleated cell types (e.g., Lama2 in fibro/adipogenic progenitor [FAP] cells and tenocytes), but these genes are not expressed in the myonuclei of Clusters IIa, IIx, or IIb, supporting the uniqueness of Clusters NMJ and MTJ. |