Although such treatments do not affect cell proliferation at the experimental tested condition, it induces a decrease in MRFs, desmin, irisin, myostatin, MHC, FGFRs, and α-KLOTHO gene expression during differentiation, indicating the possible involvement of FGF23 in muscular dysfunction characterizing hypophosphatemic rickets and the possible presence of negative feedback providing protection against high FGF23 levels. This evidence concerns the gene FNDC5 and Dent disease.