General study design to compare two CKD rodent models. Two weeks after surgery, groups AD-2K and AD-1K were fed an AD diet over 3 weeks. The control group was sham-operated and fed a standard rodent chow. Parameters to monitor disease progression were frequently assessed throughout the study. AD, adenine at 0.75% in the diet; AD-1K rats, rats with unilateral nephrectomy and AD; AD-2K rats, sham-operated rats with AD; CKD, chronic kidney disease; UNx, unilateral nephrectomy.