All subjects enrolled will receive REACT. Subjects will receive their first REACT injection as soon as the REACT product is manufactured and shipped to the clinical site. After 6 months (+4 weeks), a second injection will be given, as appropriate. Each subject's baseline rate of renal decline, based on adequate historical clinical data obtained 24 months prior to screening visit, will serve as a comparator for monitoring the rate of progression of renal insufficiency over time.