Fig. 1. Effect of PAI-1 on circulating levels of cFGF23 and iFGF23 in Pai-1stab transgenic and Klotho mice.
Plasma levels of cFGF23 (black filled bars) and iFGF23 (gray filled bars) were measured in WT, untreated, and TM5441-treated Pai-1stab mice (A) and in WT, kl/kl, TM5441-treated kl/kl, and kl/klpai-1−/− mice (B). As seen in (A), changes in cFGF23 levels due to PAI-1 overexpression and TM5441 treatment were both significant in Pai-1stab mice. Similarly, TM5441 treatment and PAI-1 deficiency significantly reduced cFGF23 and iFGF23 levels in kl/kl mice. #P = 0.0003, $P = 0.0001 versus kl/kl cFGF23; *P = 0.03, **P = 0.001 versus kl/kl iFGF23. Analysis of the measurements by one-way analysis of variance (ANOVA) yielded significant differences (P < 0.0001) for both Pai-1stab and kl/kl mice groups.