title: Transplantation of bone marrow-derived MSCs improves cisplatinum-induced renal injury through paracrine mechanisms.
abstract: Mesenchymal stem cells (MSCs) have been reported to preserve renal function in various models of acute kidney injury (AKI). Different routes were used to transplant MSCs but the role of cell transplantation routes in directing outcomes has been unknown. In the present study, we evaluated organ bio-distributions of transplanted MSCs, and correlated survival of transplanted cells with outcomes in mice with cisplatinum-induced AKI. We found that after intravenous administration, MSCs were largely localized in pulmonary capillaries and only a minute fraction of MSCs entered kidneys and the cells survived only transiently. Therefore, we also transplanted MSCs via intraperitoneal and renal subcapsular routes. Transplanted MSCs survived longer in peritoneal cavity and renal subcapsular space. Interestingly, when MSC transplantation was followed by cisplatinum-induced AKI, renal morphology and renal functions were better preserved, irrespective of the cell transplantation route. As transplanted MSCs did not migrate to kidneys from either peritoneal cavity or renal subcapsular space, this finding suggested that migration of cells was not required for the beneficial response. The possibility of indirect mechanisms was confirmed when administration of the conditioned medium from MSCs also protected renal tubular cells from cisplatinum-induced cytotoxicity. We identified presence of over forty regulatory cytokines in the conditioned medium obtained from MSCs. Since paracrine factors released by transplanted cells accounted for improvements, it appears that the route of cell transplantation is not critical for realizing benefits of cell therapy with MSCs in AKI. Studies of specific cytokines secreted by MSCs will help to obtain new therapeutic mechanisms for renal protection.
authors.affiliation: Feinstein Institute for Medical Research, North Shore-Long Island Jewish Health System, Albert Einstein College of Medicine, Bronx, NY, United States.
authors.forename: Kang
authors.initials: K
authors.lastname: Cheng
authors.forename: Partab
authors.initials: P
authors.lastname: Rai
authors.forename: Andrei
authors.initials: A
authors.lastname: Plagov
authors.forename: Xiqian
authors.initials: X
authors.lastname: Lan
authors.forename: Dileep
authors.initials: D
authors.lastname: Kumar
authors.forename: Divya
authors.initials: D
authors.lastname: Salhan
authors.forename: Shabina
authors.initials: S
authors.lastname: Rehman
authors.forename: Ashwani
authors.initials: A
authors.lastname: Malhotra
authors.forename: Kuldeep
authors.initials: K
authors.lastname: Bhargava
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Palestro
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Gupta
authors.forename: Pravin C
authors.initials: PC
authors.lastname: Singhal
mesh_terms: D058186:Acute Kidney Injury / Q000139:chemically induced / Q000378:metabolism / Q000601:surgery*; D000818:Animals; D001806:Blood Urea Nitrogen; D001854:Bone Marrow Cells / Q000166:cytology; D002945:Cisplatin / Q000633:toxicity*; D017077:Culture Media, Conditioned / Q000494:pharmacology; D006085:Graft Survival; D007684:Kidney Tubules / Q000187:drug effects / Q000473:pathology; D045164:Mesenchymal Stem Cell Transplantation / Q000379:methods*; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D019899:Paracrine Communication / Q000502:physiology*
chemical_list: D017077:Culture Media, Conditioned; D002945:Cisplatin
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