骨髓间充质干细胞对致敏小鼠淋巴细胞增殖的影响及其作用方式

本研究探讨骨髓间充质干细胞(mesenchymal stem cells,MSC)在体外对致微小鼠淋巴细胞增殖的影响及其作用方式,以便进一步了解MSC对致敏小鼠影响的可能机制.建立致敏模型后,将应用贴壁培养法体外培养的正常小鼠骨髓MSC或其培养上清液作为免疫细胞或免疫因子,致敏小鼠的淋巴细胞作为效应细胞,用植物血凝素( phytohemagglutinin,PHA)刺激淋巴细胞增殖,在体外应用MTT法检测两者的混合淋巴细胞增殖反应.结果表明,正常小鼠骨髓MSC在体外能很好地抑制致敏小鼠脾淋巴细胞增殖,同时在MSC培养上清液也能观察到类似现象,而且随着两者细胞比例或浓度比的增大,抑制作用有所加大,当两者比例为1∶1时抑制作用最大(有明显的统计学意义).结论:MSC能在体外明显抑制致敏小鼠脾淋巴细胞增殖,该作用可以通过细胞与细胞(MSC和淋巴细胞)直接接触抑制,也可通过细胞与细胞的间接作用(如MSC的培养上清液与淋巴细胞)方式发挥作用.

Effects of mesenchymal stem cells on lymphocyte proliferation of sensitized mice in vitro and their action manner

This study was purposed to investigate the effects of mesenchymal stem cells(MSC) on lymphocyte proliferation of sensitized mice in vitro and their action manner so as to more understand the possible mechanisms of bone marrow-derived MSC action on the engraftment of hematopoietic stem/progenitor cells in sensitized mice.Bone marrow-derived MSC were cultured by adherent culture method,the MSC or culture supernatant were used as immune cells or immunologic factor,the spleen lymphocytes of sensitized mice were...