骨髓和脂肪来源的间充质干细胞免疫调节作用的比较研究

本研究中我们分离骨髓和脂肪的间充质干细胞,分别检测它们对T细胞周期、活化、抑制和增殖的作用情况,研究脂肪来源(adipose-derived mesenchemal stem cell,AMSC)和骨髓来源(bone marrow derived mesenchemal stem cell,BMSC)间充质干细胞的免疫学特征,比较它们是否存在免疫功能的差异,结果显示AMSC和BMSC均具有抑制T细胞增殖的能力,在有丝分裂原刺激和MLR的T细胞增殖中均具有剂量依赖性的,在1∶2时有极强的抑制作用,但是在1∶100时这种作用基本消失,在共培养时AMSC和BMSC都可使更多的T细胞被抑制在G0/G1期,同时也可以抑制T细胞的早期活化,但是上述作用AMSC均较BMSC弱,但是AMSC并不具有抑制T细胞凋亡的作用,而两者在Th0向Th1或Th2分化中所起的作用是基本相似的,主要抑制Th0向Th1细胞(IL-2和IFN-γ生成细胞)的分化,而对向Th2细胞(IL-4和IL-10生成细胞)分化没有明显的影响。所以,AMSC和BMSC具有类似的免疫调节作用,因AMSC取材方便而成为更佳的材料来源。

The research on the immuno-modulatory abilities of bone marrow-derived and fat-derived MSCs

To investigate that whether the immuno-modulatory capacity is intact in bone marrow-and fat derived-mesenchymal stem cells(MSCs),MSCs from the CML patients and the normal donors were isolated and the differences between the two groupe in the capability of T lymphocyte activation,proliferation and suppression were examined.The results showed that the capacity of suppressing T cell proliferation and activation is weakened.We propose that MSCs from pathological environment might be abnormal and should not be used for autologous transplantation.