Biochemical and histological effects of embryonic stem cells in a mouse model of renal failure.

Kidney diseases are a global public health problem. Despite significant advances in the understanding of renal failure (RF) and replacement therapies, this condition carries a series of complications and the life's quality of patients decreases. Differentiation capability of stem cells and their beneficial effects when they are implanted in animal models have been reported. Therefore, this work aimed to induce a long-term RF in mice, evaluating the biochemical and histological effects after implanting mouse embryonic stem cells (mESC). Mice were subjected to renal failure induction (RFI) employing cisplatin, subsequently received intraperitoneal (i.p.) injections of salt solution (control group, n=19) or 50 000 mESC (experimental group, n=19) at 24 hours, 7 days, and 13 days post-RFI. Ten animals in each group were used to analyze functional damage through serum biochemical analysis, and the mortality. For histopathological examination, three animals of each group were sacrificed at 5, 10, and 20 days post-RFI, analyzing the tubular system and glomeruli. Both groups showed blood urea nitrogen (BUN) and creatinine elevation three days post-RFI. Accumulated mortality was lower in the experimental group, presenting statistical significance. Respect to histopathological effects, the control group showed tubular dilatation, segmental focal glomerulosclerosis data, and collapsed glomeruli, while in the experimental group, glomerulosclerosis or collapsed glomeruli were not observed, evidencing regenerative data as characterized by large nuclei with prominent and binucleate nucleoli. In conclusion, mESC implant in mice with RFI significantly decreased the mortality, avoiding a greater histological deterioration related to the disease.