Chronic renal failure (CRF, or "chronic kidney failure", CKF, or "chronic kidney disease", CKD) is a slowly progressive loss of renal function over a period of months or years and defined as an abnormally low glomerular filtration rate, which is usually determined indirectly by the creatinine level in blood serum.
Chronic renal failure is an important clinical problem with significant socioeconomic impact worldwide. CRF that leads to severe illness and requires some form of renal replacement therapy (such as dialysis) is called end-stage renal disease (ESRD). Despite advances in renal replacement therapies and organ transplantation, poor quality of life for dialysis patients and long transplant waiting lists remain major concerns for nephrologists treating this condition. Renal transplantation increases the survival of patients with stage 5 CKD significantly when compared to other therapeutic options; however, it is associated with an increased short-term mortality (due to complications of the surgery).
There is therefore a pressing need for novel therapies to promote renal cellular repair and tissue remodelling. Over the past decade, advances in the field of regenerative medicine allowed development of cell therapies suitable for kidney repair.