Wu WY, Chen QK. Mesenchymal stem cells
engraftment in the injured intestine of mice.
Shijie Huaren Xiaohua Zazhi 2010;
18:3129-3133. [DOI:
10.11569/wcjd.v18.i29.3129]
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Abstract
AIM: To investigate the engraftment of murine bone marrow mesenchymal stem cells (MSCs) in the irradiated intestine of mice to provide some clues about the mechanism of intestine epithelium healing and lay an experimental foundation for treatment of intestine diseases by intravenous transplantation of MSCs.
METHODS: MSCs from male mice were isolated, expanded, identified, suspended in sterile normal saline (1 × 106 cells/mL), and slowly infused into irradiated female mice via the tail vein. Meanwhile, a group of irradiated female mice receiving an equal volume of sterile normal saline were used as controls. For tracing male MSC residence in the intestine after intravenous transplantation, in situ hybridization (ISH) was used to detect the Sry gene on the Y chromosome.
RESULTS: In the transplantation group, ISH analysis revealed the presence of male donor MSCs in the submucosa of the intestine of female mice, but not in the mucosal epithelium. At week 1 after cell transplantation, Sry-positive cells were scattered around the crypt, with a percentage of 19.48% ± 5.01%. At week 2, this percentage rose to 30.86% ± 12.14%, significantly higher than that at week 1 (P < 0.05). However, there was no significant difference in the percentage of Sry-positive cells between at week 2 and week 4 (week 4: 35.95% ± 11.98%, P > 0.05). In the control group, no Sry-positive cells were found.
CONCLUSION: After MSCs were transplanted into mice, they were attracted to and retained in the irradiated intestine and colonized in the intestinal submucosa.
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