间充质干细胞的免疫原性及其在移植中的应用(1)
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[摘要] 目的：探讨研究间充质干细胞的免疫原性以及rMSCs在临床移植中的应用。方法：使用免疫组化方法鉴定rMSCs表面rat LA-ABC、rat LA-DR、CD80、CD86分子，并使用流式细胞术检测其含量；免疫组化法rMSC表面MHCI、Ⅱ类分子的鉴定。结果：rat LA-ABC分子在大鼠间充质干细胞的表面的表达率为13.08%，同时rat LA-DR以及CD80、CD86分子在大鼠间充质干细胞的表面均未有不表达，而外周血淋巴细胞PBLs的表面对rat LA-ABC、rat LA-DR、CD80、CD86这些分子的表达率分别为92.71%、22.39%、14.08%、9.03%。光学显微镜下观察细胞染色情况，细胞核中有棕黄染色者为阳性细胞。结论：MSC具有多向分化潜能，特性稳定；MSC不表达MHCⅡ类分子,不表达或极低表达MHCI类分子，能逃脱宿主免疫系统的排斥，异基因MSC可以进入宿主细胞，并能长期存在。MSC具有低免疫原性，临床上大大降低移植排斥及移植物抗宿主病，提高临床移植的存活率。
[关键词] 间充质干细胞；免疫原性；移植；临床应用
[中图分类号] R-332 [文献标识码]A[文章编号]1674-4721(2011)03(b)-012-02
Mesenchymal stem cells and their immunogenicity in transplantation research
YANG Jindong; ZHAO Zhenlin
Department of General Surgery, the Second Hospital of Shanxi Medicial Univerdity, Taiyuan 030001, China
[Abstract] Objective: To investigate the mesenchymal stem cells of the immunogenicity and rMSCs in clinical transplantation. Methods: Immunohistochemistry identified rMSCs surface rat LA-ABC, rat LA-DR, CD80, CD86 molecules, and using flow cytometry and their contents; immunohistochemistry rMSC surface MHCI, Ⅱ molecule identification. Results: rat LA-ABC molecules in rat mesenchymal stem cell surface expression was 13.08%, while rat LA-DR and CD80, CD86 molecules in rat mesenchymal stem cells are not expressed on the surface were not suits the week the surface of blood lymphocytes PBLs of rat LA-ABC, rat LA-DR, CD80, CD86 expression of these molecules were 92.71%, 22.39%, 14.08%, 9.03%. Cells were observed under light microscope staining, nuclei were stained in brown positive cells. Conclusion: MSC have multilineage differentiation potential, characteristics and stability; MSC did not express MHC Ⅱ molecules, did not express or very low expression of MHCI molecules, can escape the host immune system rejection, allogeneic MSC can enter the host cell, and long-term existence. MSC with low immunogenicity, greatly reduce the clinical transplant rejection and graft versus host disease, improve the survival rate of clinical transplantation.
[Key words] Bone marrow-derived mesenchymal stem cells; Immunogenicity; Transplant; Clinical appication ......
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