Low Serum Cultured Adipose Tissue-Derived Stromal Cells Ameliorate Acute Kidney Injury in Rats

Abstract

Current studies suggest that mesenchymal stromal cells (MSCs) improve acute kidney injury (AKI) via paracrine/endocrine effects. We established human adipose tissue-derived stromal cells (hASCs) cultured in low (2%) serum (hLASCs), which have great potential of tissue regeneration. The present study was performed to investigate the therapeutic effects of hLASCs on AKI and to clarify the mechanisms involved. In low serum, hASCs proliferated well, while human bone marrow-derived stromal cells (hBMSCs) did not. hLASCs secreted higher levels of hepatocyte growth factor (HGF) and vascular endothelial growth factor (VEGF) than did hASCs cultured in high (20%) serum (hHASCs) or hBMSCs cultured in high serum (hHBMSCs). AKI was induced in nude rats by folic acid, and hLASCs, hHASCs or control medium were administered into the renal subcapsules. hLASCs significantly attenuated acute renal damage, while hHASCs showed far less effect. Furthermore, interstitial fibrosis observed on day 14 was less pronounced in the hLASCs group. Cell tracking experiment showed no evidence of transdifferentiation. Intravenous injection of hLASCs or hHBMSCs or subcapsular injection of hHBMSCs did not ameliorate AKI. Concerning the mechanisms, our in vivo experiments showed that HGF knockdown by siRNA impaired the ability of hLASCs to protect the kidney from acute injury whereas VEGF knockdown did not. In conclusion, hLASCs, but not hHASCs or hHBMSCs, ameliorated AKI via paracrine effects, and HGF is one of the key mediators.

Transplanted Adipose Derived Mesenchymal Stem Cells Attenuate The Acute Renal Injury Induced by Cisplatin in Rats

“…As reported before that MSCs reduced the production of TNF-α which mediated the deposition of extracellular matrix in the renal interstitium by the myofibroblasts [10,19] .…”

Melatonin pretreatment of human adipose tissue-derived mesenchymal stromal cells enhances their prosurvival and protective effects on human kidney cells

“…Furthermore, in a model of cisplatin-induced AKI, mouse ASCs, as well as their CM, showed protective effects by decreasing kidney injury and tubular cell apoptosis, and increasing mouse survival (2). With regard to human ASCs for renal protection/ repair, one study demonstrated their ability to protect recipient nude rats from folic acid-induced kidney injury and subsequent fibrosis (22). Also, an investigation using a rat model of cisplatin-induced nephrotoxicity revealed that intravenous delivery of hASCs led to lower renal damage and dysfunction, as well as higher survival (24).…”

Serum-Starved Adipose-Derived Stromal Cells Ameliorate Crescentic GN by Promoting Immunoregulatory Macrophages

“…14,15,32 Systemic or local administration of LASCs improved rat ischemic hind limb injury 15 and folic acid-induced acute renal tubular injury, 32 and impeded production of antibodies against exogenous porcine red blood cells. 14 Moreover, LASCs produce higher amounts of hepatocyte growth factor (HGF) and vascular endothelial growth factor (VEGF) in vitro than HASCs (Supplemental Figure 1C).…”