Figure 5.
Elevated phosphaturia generates renal oxidative stress. Glutathione peroxidase (GPx) activity in renal tissue. (A) GPx activity was determined in 20 µg of total protein extracts of kidney samples by a coupled reaction with glutathione reductase. Units are expressed as nanomoles of NADPH oxidized per minute and milliliter. White bars are LPD (0.2%P diet) groups and black bars are HPD (1.2%P diet) groups. t-test analysis *p < 0.05, **p < 0.01. (B) Negative correlation between renal mRNA α-klotho expression and GPx activity.