The aim of this pilot project is to assess the potential of urine miRNAs as biomarkers for characterizing patients with autosomal dominant polycystic kidney disease (ADPKD), the most prevalent inherited cause of kidney failure. Individuals with other causes of chronic kidney disease (e.g., diabetes, glomerulonephritis), who are matched for key characteristics (e.g. age, sex, level of kidney function) will serve as the control population. A technique for isolation of miRNAs from urine samples will be tailored for the specific needs of this project. Biochemical and computational analysis of small RNAs from these samples will provide urine miRNA profiles and key variability statistics that will be use to design follow-up projects involving patients with kidney disease.