Renal expression of cyclooxygensae-2 for experimental groups as described in Figure 1. Data are normalized to β-actin and expressed as percent of the LZR group. Data are means ± SEM of 7-9 animals per group. Also shown is representative blot for each group and its β-actin control. * p < 0.05 compared to the LZR or OZR; 10 Cr groups.