The homing of transplanted bone marrow mesenchymal stem cells to the thymus

doi:10.3969/j.issn.2095-4344.2016.10.010

Abstract

Abstract:

BACKGROUND: Bone marrow mesenchymal stem cells have low immunogenicity and can induce immune tolerance. At present, the mechanism of immune regulation of bone marrow mesenchymal stem cells is not completely understood. It has been rarely reported whether the bone marrow mesenchymal stem cells can migrate to the thymus after transplantation.

OBJECTIVE: To observe the distribution and survival of bone marrow mesenchymal stem cells in the thymus of aging rats after transplantation.

METHODS: Bone marrow mesenchymal stem cells cultured in vitro were transfected by adenovirus vectors expressing green fluorescent protein. Transfected bone marrow mesenchymal stem cells were injected into the portal vein of aging rats. At days 3, 7, 14, 21 after transplantation, the survival of bone marrow mesenchymal stem cells homing to the thymus was observed under fluorescence microscope. At day 3 after transplantation, thymus tissues were taken and stained with hematoxylin-eosin for pathological observation.

RESULTS AND CONCLUSION:Green fluorescent protein-labeled bone marrow mesenchymal stem cells had a strong green fluorescence at days 3 and 7 after transplantation, and the cell contour was clear. There was no significant difference in the mean absorbance values at days 3 and 7 (P > 0.05). Expression of green fluorescent protein was weakened significantly at days 14 and 21 compared with that at day 3 (P < 0.05). At 3 days after transplantation, the transplanted bone marrow mesenchymal stem cells were clearly visible in the thymus, and acute rejection was not observed. The results show that bone marrow mesenchymal stem cells can migrate to the damaged thymus tissue through the blood circulation, and can survive at least 1 week.

中国组织工程研究杂志出版内容重点：干细胞；骨髓干细胞；造血干细胞；脂肪干细胞；肿瘤干细胞；胚胎干细胞；脐带脐血干细胞；干细胞诱导；干细胞分化；组织工程

Wang Zhi-hong, Chen Wei-min, Guo Kun-yuan.

The homing of transplanted bone marrow mesenchymal stem cells to the thymus

[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(10): 1439-1445.

Figures/Tables 4

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