热诱导凋亡胶质瘤细胞致敏树突状细胞疫苗的制备与鉴定

目的 制备热诱导凋亡胶质瘤细胞致敏树突状细胞疫苗,探讨其增强树突状细胞抗原递呈、诱导细胞毒性T淋巴细胞产生更强肿瘤细胞杀伤作用的机制.方法 采用改良Inaba法,在重组小鼠粒细胞巨噬细胞集落刺激因子(rmGM-CSF)和重组小鼠白细胞介素-4(rmIL-4)作用下,体外诱导扩增小鼠骨髓来源的树突状细胞,电子显微镜和流式细胞术检测其生物学特征;分别以不同加热温度处理U251细胞,制备凋亡U251细胞致敏树突状细胞疫苗,3H-TdR掺入法和MTT法检测T淋巴细胞增殖能力和活化细胞毒性T淋巴细胞杀伤率.结果 在rmGM-CSF和rmIL-4作用下,小鼠骨髓来源细胞体外培养6～7 d即可诱导出树突状细胞,经倒置相差显微镜和电子显微镜证实细胞表面呈典型树突状结构;流式细胞术检测证实其表达特异性表面标记物CD11c,同时表达功能相关性抗原CD80、CD86和MHCⅡ.倒置相差显微镜和流式细胞术确定热诱导U251细胞凋亡的最佳条件为:44℃处理3 h再常规培养12 h,凋亡U251细胞可更好地负载树突状细胞,负载的树突状细胞可以激发T淋巴细胞增殖,诱导活化细胞毒性T淋巴细胞具有更强的杀伤肿瘤细胞的能力.结论 在rmGM-CSF和rmIL-4作用下,经体外成功制备的小鼠骨髓来源的树突状细胞,可热诱导凋亡胶质瘤细胞敏敏树突状细胞疫苗于体外有效激发T淋巴细胞增殖,诱导细胞毒性T淋巴细胞产生较强的杀伤肿瘤细胞能力.     

急性脑血管病患者协同刺激分子表达的研究

目的：探讨急性脑血管病患者血液中协同刺激分子白细胞分化抗原簇80（chuster of differention80,CED80,B7-1)、白细胞分化抗原簇86（cluster of differention86,CD86,B7-2)、白细胞分化抗原簇28（cluster of differention28,CD28）,细胞毒性T淋巴细胞抗原－4（cytotoxic T lymphocyte antigen-4,CTLA-4)蛋白的表达和B7－1、B7－2信使核糖核酸（messenger ribonucleic acid,mRNA)的表达其与急性脑血管病病损的关系。方法：应用分子生物学技术,检测急性期脑梗死（26例）,脑出血患者（26例）和年龄匹配的26名健康对照者外周血淋巴细胞B7－1,B7－2,CD28和CTLA－4蛋白的表达和外周血淋巴细胞B7－1、B7－2mRAN的表达,各病列均经头部CT或MRI并计算病灶体积,采用改良爱丁堡＋斯堪的那维亚评分标准（SSS）对临床神经功能 缺损程度进行评分,分析其相互关系。结果：外周血淋巴细胞B7－1、CD28和CTLA－4蛋白的表达,脑梗死组高于脑出血组,两组均高于健康对照组;外周血淋巴细胞B7－2蛋白的表达,三组间无显著性差异,健康对照组外周血淋巴细胞未检测到CTLA－4蛋白的表达;外周血淋巴细胞B7－1mRNA的表达,脑梗死组高于脑出血组,两组均高于健康对照,外周血淋巴细胞B7－2mRNA的表达,三组间无显著性差异,脑梗死组B7－1及CD28与SSS呈正相关,脑出血组协同刺激分子的表达以及病灶的大小与SSS无相关性,脑梗死组病灶的大小与SSS呈正相关,结论：协同刺激分子B7－1、CD28和CTLA－4在急性脑血管病的病理机制中起着重要作用。     

脱氢异雄酮对大鼠星形胶质细胞CD80、CD86和MHC-Ⅱ分子表达及其细胞增生影响的研究

目的　探讨脱氢异雄酮 ( dehydroepiandrosterone,DHEA)对大鼠星形胶质细胞 CD80、CD86和 MHC- 分子表达及其细胞增生的影响。方法　用 2、1 0、5 0 μg/m L DHEA处理体外培养的新生 Lewis大鼠星形胶质细胞后 ,应用流式细胞仪检测星形胶质细胞表面 CD80、CD86和 MHC- 分子表达 ,用液体闪烁计数器测定掺入星形胶质细胞内3H-甲基 -胸腺嘧啶核苷。结果　不同浓度的 DHEA可降低大鼠星形胶质细胞 CD86分子表达 ,5 0μg/m L DHEA可降低星形胶质细胞的增生。结论　 DHEA可能通过降低星形胶质细胞表面 CD86共刺激分子的表达抑制中枢神经系统内的免疫反应 ,高浓度的 DHEA可降低星形胶质细胞的增生。     

人脐带间充质干细胞体外成骨及其免疫学特征

背景：目前关于脐带源性干细胞的研究主要是针对其多向分化、组织修复方面,而对脐带干细胞的同种异体之间移植免疫学的报道较少。 目的：观察体外培养的人脐带间充质干细胞生物学特性、成骨分化潜能及移植免疫学特征。 设计、时间及地点：细胞学体外实验,于2008-11在吉林大学药学院病理学实验室完成。 材料：脐带来源于健康产妇足月剖腹产的胎儿,靠近胎儿侧5 cm,均征得孕妇同意。 方法：应用组织块贴壁法分离培养脐带间充质干细胞,胰酶消化传代。取传至第5代细胞,加入含地塞米松、抗坏血酸、 β-甘油磷酸钠的α-MEM完全培养基进行成骨诱导。另取传至第5代细胞,分别进行正常培养及应用γ-干扰素刺激48 h。 主要观察指标：脐带间充质干细胞形态观察、生长曲线分析、免疫表型分析。碱性磷酸酶染色观察细胞成骨分化情况。流式细胞仪检测γ-干扰素刺激后细胞免疫表型变化。 结果：培养7 d倒置显微镜下可见组织块边缘出现呈长梭形、多角形或三角形的贴壁细胞,且随时间延长组织块周围细胞数量逐渐增多。第2,5,9代细胞之间的生长曲线无明显变化,培养20代内未见细胞衰老及增殖速度减慢等现象发生。第2代贴壁细胞CD44,CD105均呈阳性表达,CD34,CD45均呈阴性表达。成骨诱导14 d后,碱性磷酸酶染色可见胞核染成均一的淡蓝色。第5代脐带间充质干细胞HLA-ABC呈弱阳性(40.50%),HLA-DR,CD80,CD86呈阴性表达;γ-干扰素刺激48 h后,HLA-ABC阳性率增加至87.44%,HLA-DR,CD80,CD86仍呈阴性表达。 结论：人脐带间充质干细胞体外诱导成骨能力确切,具有类似骨髓间充质干细胞的特异性表面标记,且具有同种异体移植的低免疫原性。     

嗅鞘细胞移植治疗免疫性脑脊髓炎：有免疫学排斥现象吗？

目的：研究嗅鞘细胞（OECs）的免疫原性及移植实验性免疫性脑脊髓炎（EAE）后颈淋巴系统的反应。方法：用新生ICR小鼠嗅球培养出OECs, 流式细胞术（FCM）检测其表面主要组织相容性抗原I、II类（MHC-I、MHC-II）表达情况。将经荧光染料CFSE标记OECs悬液或PBS注入EAE大鼠或正常大鼠的侧脑室,收集移植7天后颈部淋细胞,FCM检测CFSE+、抗原提呈细胞标志物CD83+及CFSE+CD83+的表达率,混合淋巴细胞培养检测淋巴细胞增殖率（PI）。结果：OECs高表达MHC-I (78.4±4.45%),中表达MHC-II(43.2±2.98%)。移植实验显示移植OECs的EAE大鼠颈部淋巴结中CD83+（3.83±0.03%）、CFSE+（2.47±0.05%）及CD83+CFSE+（1.98±0.04%）检出率及OECs诱导的PI值（1.32±0.06）均高于对照组或正常大鼠（P<0.05）。同时,PBS注射的EAE大鼠,较正常大鼠亦有较高的CD83+检出率（3.12±0.04%）及PI值（1.20±0.03）（P<0.05）。结论： OECs高表达的MHC分子提示OECs有免疫原性,移植后局部淋巴系统可出现针对OECs的抗原引流、提呈及T细胞的活化,进一步分析提示这种免疫反应的启动依赖于EAE的炎性环境,而OECs移植则加重这一过程。     

大鼠脂肪和骨髓来源间充质干细胞的生物学特性比较

背景：除骨髓外,人们已从胎盘组织、脐带血肌肉组织、脂肪组织中分离到了间充质干细胞。 目的：比较大鼠脂肪和骨髓间充质干细胞生物学特性和免疫调节功能的差异。 方法：脂肪间充质干细胞和骨髓间充质干细胞分别来自BN大鼠的脂肪和骨髓。体外分离、纯化脂肪和骨髓来源间充质干细胞,进行细胞形态、表面标志、生长动力学、分化潜能鉴定;混合淋巴细胞反应比较两种细胞的免疫调节特性。 结果与结论：脂肪间充质干细胞与骨髓间充质干细胞光镜和透射电镜下形态相似,第3代的脂肪间充质干细胞和骨髓间充质干细胞均高表达CD29,CD90,低表达CD34,CD45,CD11b;第3,4,5代脂肪间充质干细胞增殖速度明显快于骨髓间充质干细胞;两者都具有低免疫原性,可以抑制异基因抗原引起的T淋巴细胞增殖,且这种抑制作用与细胞数目成正相关,等量脂肪间充质干细胞和骨髓间充质干细胞抑制作用差异无显著性意义。结果证实脂肪间充质干细胞具有和骨髓间充质干细胞同样的低免疫原性和免疫调节功能。     

经阿魏酸钠定向诱导的骨髓间充质干细胞在脑缺血大鼠体内移植研究

目的探讨经阿魏酸钠定向诱导的人骨髓间充质干细胞(mesenchymal stem cells,MSC)体内移植后在局灶性脑缺血大鼠脑内的存活及分布状况。方法分离、培养人MSC,经阿魏酸钠定向诱导后用于移植。复制大鼠局灶性大脑中动脉栓塞模型,实验组经股静脉注入诱导后CM-DiI标记的MSC,对照组注入等体积的生理盐水。2周后取脑组织行冰冻切片,荧光显微镜下观察移植细胞在脑组织中的存活及分布状况,同时检测神经元标志物NSE的表达。结果 MSC经阿魏酸钠诱导24h后,细胞逐渐圆缩并伸出突触,呈现神经细胞样形态,CD29表达阳性,CD34表达阴性。实验组大鼠脑内可见CM-DiI标记的MSC,主要分布在缺血侧损伤灶;同时可检测到细胞表面表达神经元标志物NSE。结论 MSC经阿魏酸钠诱导后向神经细胞分化,诱导分化的细胞能在脑缺血大鼠脑内存活,且主要分布在缺血侧损伤区,并仍保留已分化神经细胞的特性。     

人脐血间充质干细胞对T淋巴细胞旁分泌的免疫调节作用**☆

背景：相关研究表明脐血间充质干细胞具有一定的免疫调节作用,但具体机制不详。 目的：观察脐血源间充质干细胞通过旁分泌机制对T淋巴细胞增殖的影响。 方法：分离正常分娩产妇脐血间充质干细胞和健康志愿者外周血T淋巴细胞,按不同比例建立脐血间充质干细胞与T淋巴细胞非接触共培养体系,以单独培养T淋巴细胞作为对照组。 结果与结论：脐血间充质干细胞形态学呈现成纤维梭型细胞样,呈旋涡状团集生长。流式细胞仪检测脐血间充质干细胞表面标记物：CD29(+),CD44(+),CD34(-),CD45(-),HLA-DR(-);与对照组相比,共培养组可明显抑制植物血凝素刺激T淋巴细胞的增殖作用(P < 0.05),且呈剂量依赖性;ElISA法检测共培养组分泌的白细胞介素10水平较对照组明显升高(P < 0.05);中和试验后脐血间充质干细胞对T淋巴细胞增殖的抑制作用明显减弱。结果说明脐血间充质干细胞可明显抑制异体外周血T淋巴细胞的增殖,可能是通过旁分泌白细胞介素10达到负向免疫调节作用。     

人类胚胎干细胞及其衍生的神经干细胞的免疫原性

目的体外观察人类胚胎干细胞（hESCs）及其衍生的神经干细胞（NSCs）的免疫原性。方法运用流式细胞仪检测hESCs及其衍生的NSCs表面HLA-I类分子（HLA．ABC）、HLA-Ⅱ类分子（HLA—DR、-DP、-DQ）的组成型表达，并观察在30ng／ml重组人干扰素-γ（IFN-γ）诱导作用下NSCs细胞表面HLA-I、HLA-Ⅱ诱导型表达的情况。同时通过将IFN-γ诱导前后的NSCs与健康人外周血淋巴细胞共培养，观察淋巴细胞增殖的程度，了解其免疫反应情况。结果在未分化前hESCs表面仅少量表达HLA—I类抗原（6．18％），几乎没有HLA-Ⅱ类抗原的表达；经诱导分化成NSCs后HLA-I类抗原表达有所增加（23．56％），HLA-Ⅱ类抗原表达亦轻度增高（1．28％、1．73％）；经IFN-γ诱导后，NSCs表面HLA-I类抗原表达（46．43％）明显上调，HLA-Ⅱ类抗原的表达（8．73％、10．57％）也进-步地上调，且其刺激淋巴细胞发生增殖反应的能力也进-步增强。结论hESCs衍生的NSCs具有-定的免疫原性，可能会诱导针对HLA-I类分子的排斥反应，而在宿主的机体处于某些炎症或应激状态及移植局部存在炎症反应时，有可能进-步诱导针对HLA-Ⅱ类分子的免疫反应。     

益肾达络饮与变应性脑脊髓炎小鼠血脑屏障的完整性

为了验证益肾达络饮对实验性变应性脑脊髓炎小鼠血脑屏障完整性的保护作用,应用实时荧光定量RT-PCR和分光光度计检测实验性变应性脑脊髓炎小鼠脑和脊髓内T淋巴细胞表面标记物CD4、CD8以及单核细胞表面标记物CD11b mRNA的表达变化以及伊文思蓝含量。结果提示实验性变应性脑脊髓炎小鼠血脑屏障通透性增高与脑内CD4、CD8、CD11b mRNA表达的升高相关,应用益肾达络饮可以明显减轻实验性变应性脑脊髓炎小鼠大脑和脊髓炎性细胞的聚集。     

Expression of the B7-related molecule ICOSL by human glioma cells in vitro and in vivo

Human glioblastoma is a highly lethal tumor known for its capability of interfering with effective antitumor immune responses. Costimulatory signals are of critical relevance in both the inductive and effector phases of immune responses. Inducible costimulator-ligand (ICOSL), a member of the B7 family of costimulatory molecules related to CD80/CD86, regulates CD4 as well as CD8 T-cell responses via interaction with its receptor, ICOS, on activated T cells. We report the expression of ICOSL by glioma cells in vitro and in vivo. In contrast to CD80 (B7.1) and CD86 (B7.2), ICOSL protein and mRNA was expressed in 7 of 12 glioma cell lines. ICOSL expression is upregulated by the inflammatory cytokine, tumor necrosis factor-alpha (TNF-alpha), whereas interferon-gamma (IFN-gamma) has no such effect. Further, immunohistochemical analysis of human brain tumors demonstrates the expression of ICOSL in three of four tissue samples. ICOSL expression is functional in that a neutralizing ICOSL antibody (HIL-131) reduces Th1 and Th2 cytokine levels in cocultures of peripheral blood lymphocytes or T-cell subsets (CD4 and CD8) with glioma cells. However, ICOSL gene transfer into glioma cells does not alter their immunogenicity under primary or secondary alloreactive coculture assays.     

Expression of costimulatory molecules on peripheral blood mononuclear cells in multiple sclerosis

OBJECTIVE: To determine whether there was aberrant expression of costimulatory molecules and their receptors on peripheral blood mononuclear cells of MS patients and healthy individuals and whether expression correlated with disease status. METHODS: Forty-six patients with MS and 29 healthy individuals were analyzed by direct 2-color immunofluorescence flow cytometry for expression of CD80, CD86, CD28 and CTLA-4 on T and B cells and monocytes. RESULTS: Expression of CD80 on CD4+ T cells was upregulated in progressing MS patients compared to stable MS patients and controls. Marked increase in the expression of CD80 and CD86 was seen on both CD4+ and CD8+ T cells from an MS patient with rapidly progressing disease. No difference in the expression of the costimulatory molecules or their ligands was seen between IFN-beta treated and non-treated MS patients. CONCLUSIONS: Aberrant expression of costimulatory molecules occurs on T lymphocytes in MS patients with progressing disease.     

The 'immunological-synapse' at its APC side in relapsing and secondary-progressive multiple sclerosis: modulation by interferon-beta

Reciprocal interactions between T cells and antigen-presenting cells (APCs) within the 'Immunological-Synapse' (IS) govern immune cell autoreactivity in multiple sclerosis (MS). The present study examined the expression of a range of co-stimulatory molecules: CD40, CD54, CD80, CD86 and HLA-DR, on the cell-surface of CD14(+) peripheral blood monocytes (PBM) from relapsing-remitting (RR) and secondary-progressive (SP)-MS patients, prior to and during 1 year of Interferon (IFN)-beta-1a (Rebif(R)) therapy. Prior to treatment, patients from both MS subtypes expressed elevated CD80 and reduced CD40 levels in comparison to controls. CD86 expression was significantly reduced in SP compared to RR patients and controls. IFN-beta therapy led to a significant reduction in the expression of CD54 and CD80 in both groups of patients as well as to elevation of CD40 and CD86 expression in SP patients. These results confirm IFN-mediated modulation of the APC surface within the immunological-synapse and implicate CD80 and CD86 as targets for interventional therapies in MS as well as other Th1-mediated autoimmune diseases.     

“自体血清＋鸡尾酒法”诱导外周血DC成熟的研究

目的比较三种不同的分离诱导外周血树突状细胞（DC）成熟的方法。方法取正常成人外周血约180ml，分成三组。分离单核细胞后，经典脂多糖（LPS）诱导组（A组）：接种于含RPM11640＋胎牛血清完全培养基的25cm^2培养瓶中，2h后弃悬浮细胞，将贴壁单核细胞，用粒-巨噬细胞集落刺激因子和白介素4培养，培养到第6天时加入LPS诱导24h；鸡尾酒诱导组（B组）：单核细胞的培养同A组，培养到第6天时用细胞因子组合（1000U／ml肿瘤坏死因子、10ng／ml白介素6、10ng／ml白介素1β、1μg/ml前列腺素E2）诱导24h；自体血清＋鸡尾酒诱导组（C组）：单核细胞用RPM11640＋10％自体血清完全培养基培养，诱导方法同B组。用流式细胞仪检测各组收集的DC细胞成熟表型CD80、CD86、CD83以及白细胞表面抗原HLA-DR的表达；动态观察各组细胞成熟过程中形态的改变以及其激活淋巴细胞增殖的能力。结果C组DC成熟过程中形态好、突起多；其成熟表型CD86、CD83、CD80以及HLA-DR的平均表达率分别是（88．60±6．34）％、（50．55±4．03）％、（73．89±6．15）％、（93．24±7．78）％，明显高于A、B组（P〈0．05）；激活淋巴细胞增殖指数为2．03，亦明显高于A、B组（P〈0．05）。结论自体血清＋鸡尾酒诱导法是一种简单、方便、经济的外周血DC分离诱导成熟的新方法。     

Interleukin-2 receptor in peripheral blood lymphocytes of Alzheimer's disease patients.

In this study, we investigated the differences in the incidence rate of human leukocyte antigen-DR (HLA-DR) and interleukin 2 receptor (IL-2R) in the peripheral blood lymphocytes of 13 women who were diagnosed clinically as having Alzheimer's disease (AD group), and 13 healthy women with no mental disorders (control group). As a result, the AD group showed a markedly higher rate of lymphocyte subsets of CD4+HLA-DR+, CD4+IL-2R+, CD8+HLA-DR+, CD8-HLA-DR+ and CD8+IL-2R+. This finding indicates a possible immune reaction occurring in the peripheral blood of AD patients. In addition, these higher rates correlate well with the changes in the immune system reported in the postmortem brains of AD patients. Our findings indicate that immunological interactions exist between the central nervous system and the peripheral blood lymphocytes of AD patients, and AD might be induced by an immune reaction occurring in the brain.     

特发性多发性肌炎外周血淋巴细胞共刺激分子表达的研究

目的观察特发性多发性肌炎患者外周血淋巴细胞共刺激分子CD28、CD152、CD80、CD86表达,进一步分析共刺激分子与疾病的关系。方法研究分三组,即健康对照者（HC,n=5）、特发性多发性肌炎组（IPM,n=8）和肌营养不良组（MD,n=8）,后两组患者均经肌肉活检酶组织化学确诊。三组患者均通过流式细胞术检测外周血淋巴细胞CD4、CD8、CD4＋CD28＋、CD8＋CD28＋、CD152、CD80、CD86表达,并计算出CD4＋CD28-、CD8＋CD28-表达。结果与HC组比较,IPM组CD4＋CD28＋表达降低（31.9±6.6 vs 39.5±6.9,P〈0.05）,其所占CD4＋T细胞的百分率亦明显下降（92.2%±6.2% vs 98.1%±0.7%,P〈0.05）,与之相反的是CD4＋CD28-表达明显升高（2.0±1.8 vs 0.6±0.2,P〈0.05）。IPM组CD4、CD8表达及CD8＋CD28＋/CD8百分比与HC组无明显差异,CD8＋CD28-表达则呈上升趋势。IPM组CD152较HC组明显升高（18.5±13.8 vs 7.1±1.2,P〈0.05）,各组间CD80表达无明显差异,CD86以IPM组最高（6.8±1.9 vs 4.6±1.7,P〈0.05）。结论IPM患者外周血CD4阳性的T细胞表面的CD28表达下降,但CD152和CD86表达升高。     

Monocytes in multiple sclerosis: phenotype and cytokine profile

Multiple sclerosis (MS) is an inflammatory demyelinating disease characterised by immune abnormalities in the central nervous system (CNS) as well as systemically. Activated, blood-borne monocytes are abundant in MS lesions, the properties of circulating monocytes are incompletely known. To delineate phenotype and levels of cytokine secreting monocytes in MS patients' blood, ELISPOT assays were used for detection and enumeration of monocytes secreting the cytokines IL-6, IL-12, TNF-alpha and IL-10. In parallel, the expression by monocytes of co-stimulatory molecules (CD40, CD80, CD86), major histocompatibility complex molecules (HLA-ABC, HLA-DR) and Fcgamma receptors (CD16, CD64) was examined by flow cytometry. Levels of blood monocytes secreting IL-6 and IL-12 were higher in patients with untreated MS and other neurological diseases (OND) compared to healthy controls, while levels of monocytes secreting TNF-alpha and IL-10 did not differ between groups. MS patients' blood monocytes also displayed elevated mean fluorescence intensity for the co-stimulatory molecule CD86, and MS patients with longer disease duration (>10 years) and higher disease severity (EDSS >3) had higher percentages of CD80 expressing monocytes compared to patients with short duration or lower severity. In conclusion, monocyte aberrations occur in MS and may change over the disease course.     

Immunological effects of in vivo interferon-β1b treatment in ten patients with multiple sclerosis: a 1-year follow-up

Ten patients with multiple sclerosis and treated with interferon-β_1b (IFN-β_1b) were followed-up for 1 year with quantitation of serum VCAM-1 and ICAM-1 levels, mean fluorescence intensity of HLA-DR, VLA-4, CD11a, and CD18 on peripheral blood monocytes and lymphocytes, and adhesion of peripheral blood monocytes and CD45⁺ cells on endothelial cell monolayers. Adhesion molecule expression and adhesion of peripheral blood monocytes to endothelium were also monitored in healthy controls. No differences in adhesion were detected between MS patients before treatment and healthy controls, while after 1 year a marked decrease in the number of monocytes and mononuclear cells adhering to human umbilical vein endothelial cell monolayers was observed in patients treated with IFN-β_1b. After 1 year of treatment a significant increase in HLA-DR on peripheral blood monocytes was also detected. Our findings regarding lowered adhesion add information to available evidence of the mechanisms of action of IFN-β_1b in MS. Received: 10 August 1998 Received in revised form: 9 December 1998 Accepted: 23 December 1998     

经血源性子宫内膜间充质干细胞的分离、培养与鉴定*****

背景：目前用于干细胞研究的主要来源为胚胎干细胞和骨髓干细胞,但这两种来源都存在着部分局限性,因此需要寻找一种新型的干细胞以克服肿瘤形成的潜在性、标本来源的缺乏及伦理学的争议等弊端。 目的：分离培养经血源性子宫内膜间充质干细胞并进行鉴定。 方法：采用Ficoll密度梯度离心法分离出人经血源性子宫内膜间充质干细胞,对细胞的形态及生长特性进行观察;采用流式细胞仪对细胞表面抗原CD29、CD44、CD34 、CD45、HLA-ABC及HLA-DR进行表型鉴定;免疫细胞化学法测定经血源性子宫内膜间充质干细胞中nestin阳性细胞表达。 结果与结论：应用Ficoll密度梯度离心法可以从女性月经血中分离培养出干细胞,约2周原代细胞达到80%~90%融合,细胞呈漩涡状、网状、辐射状。传代后能稳定生长,可见纤维样细胞形态为主导。流式检测结果显示,经血源性子宫内膜间充质干细胞表现出CD29强阳性,CD44阳性,CD34 、CD45 、HLA-DR阴性,低表达HLA-ABC。染色显示nestin抗原在经血源性子宫内膜间充质干细胞中有表达,约占经血源性子宫内膜间充质干细胞的(10.35±0.51) %。结果表明经血源性子宫内膜间充质干细胞表达间充质干细胞的标记物,具低免疫源性;经血源性子宫内膜间充质干细胞表达nestin抗原,为经血源性子宫内膜间充质干细胞在神经系统应用提供一定的理论依据。