 The proposed studies will examine the effect of fisetin on adipose tissue-derived mesenchymal stemstromal cell function, kidney function, markers of inflammation, and physical function in individuals with advanced chronic kidney disease, particularly diabetic kidney disease. This study will involve a single 2-day oral treatment regimen with fisetin or placebo. Study subjects will be randomized 2:1 to study drug or placebo. Study visits will consist of blood, urine, and abdominal wall skin and subcutaneous fat samplings in addition to testing of physical strength at given time points. Subjects will be followed for a total of 12 months. 