机构地区:[1]首都医科大学宣武医院细胞生物室,北京100053 [2]广州军区广州总医院神经内科,广州510010 [3]中山大学生命科学大学院,广州510275 [4]首都医科大学宣武医院神经外科,北京100053
出 处:《中华神经医学杂志》2016年第8期770-777,共8页Chinese Journal of Neuromedicine
基 金:(1)基金项目:北京市自然科学基金(7102078)(2)基金项目:北京市科委健康培育项目(Z111107067311033)(3)基金项目:北京市科技新星项目(2009822)(4)基金项目:北京市教育委员会科技计划重点项目(KZ201310025024)
摘 要:目的观察胚胎来源人骨髓间充质干细胞(hBM-MSCs)能否抑制体外培养的大鼠外周血单个核细胞(PBMCs)增殖和炎症因子表达,探讨哪些人源性促炎因子可以诱导hBM-MSCs发挥免疫抑制作用,并观察hBM-MSCs对脑梗死模型大鼠梗死区肿瘤坏死因子-α(TNF-α)mRNA和蛋白表达的影响。方法将提取的hBM-MSCs和大鼠PBMCs进行共培养,并以在培养基中添加10 μg/mL刀豆蛋白A(ConA)方式激活大鼠PBMCs。(1)实验主要包括hBM-MSCs+PBMCs组、hBM-MSCs+PBMCs+ConA组、PBMCs组、hBM-MSCs组,采用CCK-8法检测各组细胞增殖情况。(2)实验主要包括hBM-MSCs+PBMCs+ConA组、PBMCs+ConA组,采用ELISA法检测培养液中TNF-α、干扰素-γ (IFN-γ)、白介素-10 (IL-10)的表达水平。(3)实验分为hBM-MSCs+PBMCs (IFN-γ+IL-1α)组、hBM-MSCs+PBMCs (IFN-γ+IL-1β)组、hBM-MSCs+PBMCs (IFN-γ+TNF-α)组、hBM-MSCs+PBMCs组,采用CCK-8法检测各组细胞增殖情况。(4)SD大鼠30只按随机数字表法分为假手术组、对照组(脑缺血后尾静脉给予生理盐水)和hBM-MSCs组(脑缺血后尾静脉给予hBM-MSCs),每组10只。术后3 d取材,采用RT-PCR、Western blotting检测脑梗死区TNF-α mRNA和蛋白表达。结果(1)与PBMCs组、hBM-MSCs组相比,hBM-MSCs+PBMCs组吸光度值均显著升高,差异均有统计学意义(P〈0.05)。与hBM-MSCs+PBMCs组相比,hBM-MSCs+PBMCs+ ConA组吸光度值明显下降,差异有统计学意义(P〈0.05)。(2)与PBMCs+ConA组TNF-α、IFN-γ[(1030± 196) pg/mL、(2880±250) pg/mL]比较,hBM-MSCs+PBMCs+ConA组TNF-α、IFN-γ表达[(160±10) pg/mL、(240±55) pg/mL]明显降低,IL-10表达[(330±45) pg/mL vs. (750±110) pg/mL]明显升高,差异均有统计学意义(P〈0.05)。(3)hBM-MSCs+PBMCs (IFN-γ+IL-1α)组、hBM-MSCs+PBMCs(IFN-γ+ IL-1β)组、hBM-MSCs+PBMCs (IFN-γ+TNF-�Objective To investigate whether human bone marrow mesenchymal stem cells (hBC-MSCs) have the immune-suppression ability on the proliferation of peripheral blood mononuclear cells (PBMCs) and their pro-inflammatory cytokine production in rats, to explore what kinds of human cytokines are required for the induction of hBM-MSCs to become immune-suppressive, and to observe the effect of intravenous delivery of hBM-MSCs on tumor necrosis factor (TNF)-a transcription and expression in the core infarct areas of rats after cerebral ischemia. Methods The fetal-originated hBC-MSCs and rat PBMCs were extracted; the rat PBMCs were activated by adding 10 μg/mL concanavalin A (ConA). (1) The first experiment was divided into hBM-MSCs+PBMCs group, hBM-MSCs+PBMCs+ConA group, PBMCs group and hBM-MSCs group; CCK-8 assay was employed to detect the proliferation of these cells. (2) The second experiment was divided into hBM-MSCs+PBMCs+ConA group, PBMCs+ConA group; ELISA was used to detect the TNF-a, interferon-Y(IFN-7) and interleukin (IL)-10 expressions. (3) The third experiment was divided into hBM-MSCs+PBMCs (IFN-Y+IL-la) group, hBM-MSCs+PBMCs (IFN-Y+IL-1β) group, hBM-MSCs+PBMCs (IFN-Y+TNF-a) group and hBM-MSCs+PBMCs group; CCK-8 assay was used to detect the proliferation of these cells. (4) Thirty SD rats were randomly divided sham-operated group, control group (giving normal saline after ischemia) and hBM-MSCs group (giving hBM-MSCs after ischemia, n=10); on the third d of ischemia, the TNF-a mR_NA and protein expressions at the infarct areas was detected by real time PCR and Western blotting, respectively. Results (1) The optical density (OD) in the hBM-MSCs+PBMCs group was significantly increased as compared with that in the PBMCs group and hBM-MSCs group (P〈0.05); OD in the hBM-MSCs+PBMCs group was significantly increased as compared with that in the hBM-MSCs+PBMCs+ConA group (P〈0.05). (2) The TNF-a, IFN-Y
关 键 词:脑梗死 人骨髓间充质干细胞 单个核细胞 炎症因子 免疫抑制
分 类 号:R743.3[医药卫生—神经病学与精神病学]
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