Abstract
Background
Mesenchymal stem cell therapy in renal failure is rarely used because of low rates of cell engraftment after systemic delivery. Repeated intra-arterial cell administration may improve results; however, no current delivery method permits repeated intra-arterial infusions in a rat model. In this study, we developed an intra-arterial delivery system for repeated stem cell infusion via the aorta, catheterizing the left femoral artery to the suprarenal aorta under fluoroscopic guidance in rats with adenosine-induced renal failure.
Methods
First, we compared our intra-arterial catheter system (C group, n = 3) with tail vein injection (V group, n = 3) for engraftment efficacy, using mesenchymal stem cells from luciferase transgenic rats. Rats were infused with the cells and euthanized the following day; we performed cell-tracking experiments using a bioluminescence imaging system to assess the distribution of the infused cells. Second, we assessed the safety of the system over a 30-day period in a second group of six rats receiving infusions every 7 days.
Results
Cells infused through our delivery system efficiently engrafted into the kidney, compared with peripheral venous infusion. In five of the six rats in the safety study, the delivery system remained patent for at least 9 days (range, 9–24 days). Complications became evident only after 10 days.
Conclusion
Our intra-arterial catheter system was effective in delivering cells to the kidney and permitted repeated injection of cells.
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Acknowledgments
The authors would like to thank Ms. Hanako Goto for secretarial assistance and all personnel in the Institute for Laboratory Animal Research in The Jikei University School of Medicine. We are indebted to Dr. Jane Charbonneau for processing the manuscript. Luciferase transgenic rats were kindly donated by Prof. Eiji Kobayashi and Takumi Teratani (Jichi Medical University, Japan). This work was supported by grants from The Uehara Memorial Foundation and the Ministry of Education, Culture, Sports, Science and Technology and the Ministry of Health, Labour and Welfare of Japan.
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Katsuoka, Y., Ohta, H., Fujimoto, E. et al. Intra-arterial catheter system to repeatedly deliver mesenchymal stem cells in a rat renal failure model. Clin Exp Nephrol 20, 169–177 (2016). https://doi.org/10.1007/s10157-015-1161-8
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DOI: https://doi.org/10.1007/s10157-015-1161-8