In addition to Fgf23, R1MAb2 and vitamin D treatment similarly induced the expression of several genes, including osteocalcin (Ocn), osteoprotegerin (Opg), progressive ankylosis (Ank), dual-specificity phosphatase 6 (Dusp6), and apolipoprotein D (Apod). Here, FGF23 is linked to ankylosis.