Figure 4.

Effect of continuous PTH on serum FGF23. All the mice received a continuous infusion of PTH or vehicle for 8 days, as described in Figure 1. Serum FGF23 of the infused mice was measured after infusion for 24 hours (A) and for 8 days (B). Data were expressed as mean ± SEM (n = 6). a, P < .05 (compared with vehicle infused mice with the same genotype).