CALCA and Ureteral obstruction: However, in the 7d‐UUO model, the inflammatory response to ureteral obstruction has peaked, and thus, it was not surprising to find that the relatively low levels of proinflammatory cytokines in the plasma of the mice, whereas the keratinocyte chemoattractant (KC) and interleukin‐6 (IL‐6) was still statistically significantly elevated in female UUO mice.