CD40在系统性红斑狼疮外周血淋巴细胞的表达

使用密度离心法分离SLE患者和正常人外周血单个核细胞 (PBMC ) ,采用流式细胞术检测B淋巴细胞白细胞分化抗原 4 0 (CD4 0 )的表达水平 ,进行SLE患者 (活动期和缓解期 )和正常人之间的比较 ;并进行B淋巴细胞CD4 0表达水平和血清抗dsDNA抗体水平及狼疮活动指数 (SLEDAI)的相关分析。结果表明 ,活动期SLE患者外周血B淋巴细胞比例 (% )和其表达CD4 0的比例 (% )均明显高于缓解期SLE患者和对照组 ,其表达CD4 0的平均荧光强度 (MFI)在活动期SLE患者最高 ,缓解期SLE患者稍低 ,对照组最低 ;相关分析结果表明 ,活动期SLE患者B淋巴细胞CD4 0的表达比例 (% )和强度 (MFI)均与血清抗dsDNA抗体及SLEDAI呈正相关 ,后两者呈高度相关 ;缓解期SLE患者B淋巴细胞表达CD4 0的强度 (MFI)和SLEDAI呈正相关。CD4 0在活动期SLE患者B淋巴细胞的表达增加 ,其水平与疾病活动度有关。     

Expression of CTLA-4 Molecule in Peripheral Blood T Lymphocytes from Patients with Systemic Lupus Erythematosus

CTLA-4 is a cell surface molecule expressed on activated T cells that is suggested to deliver a negative signal for T cell activation. Since CTLA-4 might be a negative regulator of autoimmune diseases, we investigated its expression on T cells from 20 patients with systemic lupus erythematosus (SLE) by flow cytometric analysis and RT-PCR. We found that although CTLA-4 mRNA was readily detected in all patients and controls, only a very minor subset of T cells expressed detectable surface CTLA-4 molecules in both groups. But patients with SLE had significantly increased percentages of CTLA-4-positive T cells compared with normal controls, implying at least that there was no apparent defective expression of CTLA-4 molecule in human lupus. The kinetics of CTLA-4 expression on T cells stimulated in vitro with PMA plus ionomycin were similar in normal controls and patients with SLE. The expression of CTLA-4 molecules after stimulation increased gradually and peaked at 72 hr. However, the induction of CTLA-4 expression on patients' T cells appeared to be weaker than that of normal individuals. Whether this reflects impaired down regulation by CTLA-4 molecules in SLE patients needs to be clarified further.     

系统性红斑狼疮病人T和B淋巴细胞凋亡的观察

为了研究SLE的T、B淋巴细胞及其亚类的凋亡情况,采用碘化丙锭染色,在流式细胞仪下观察计数:22例SLE病人淋巴细胞(包括总体淋巴细胞、CD3~+、CD4~+、CD8~+T细胞和CDl9~+B细胞)凋亡率在培养0、24、48h时均较正常组有显著增高,并以CD4~+T细胞和CDl9~+B细胞在活动期SLE病人中凋亡更突出。此外,SLE病人,自身抗体产生愈多,其细胞凋亡率愈高;疾病活动度增高,凋亡率也较高。提示;SLE病人的淋巴细胞凋亡在体外加速,与其自身抗体产生有密切关系,在其发病机制中起一定的作用。     

系统性红斑狼疮患者的Th细胞亚群平衡失调的初步研究

为分析Th亚群平衡失调在系统性红斑狼疮 (SLE )发生发展中的变化特点 ,以ELISA法检测血清IL 10、IL 12水平 ,以细胞内细胞因子的流式细胞术检测SLE患者PBMC的不同Th细胞亚群分泌细胞因子的变化特点 ,应用三色荧光标记技术分析Th1/Th2细胞表型。结果显示 :SLE患者血清IL 10水平显著高于正常人 ,而IL 12呈低水平表达。SLE患者CD4 + IFN γ IL 10 + 细胞亚群百分率显著高于正常人 ,IFN γ+ IL 10 与IFN γ IL 10 + 细胞亚群的比值明显降低 ,IFN γ+ IL 10 + 双阳性的CD4 + T细胞亦显著增多。SLE患者的CD4 + CCR5 CCR3+ 细胞亚群百分率与正常人比较显著升高 ,CD4 + CCR5 + CCR3 细胞亚群与正常人比较 ,示发现有显著差异 ,CD4 + CCR5 + CCR3 /CD4 + CCR3+ CCR5 比值显著低于正常对照组。这些结果提示 :SLE高水平IL 10与IL 12的低水平表达呈负相关 ;患者体内分泌IL 10的Th细胞数增多 ;Th细胞表面趋化因子受体的表达提示SLE存在CCR5 CCR3+ 细胞亚群的优势活化、数量增多 ,CCR5 + CCR3 /CCR3+ CCR5 细胞比例失调 ,从而导致免疫网络平衡被破坏。     

SLE患者T细胞TCR/CD3复合物介导的信号转导研究

为证明SLE患者T细胞功能异常是否与其生物化学信号转导异常有关。用CD3单抗与羊抗鼠二抗IgG相交联刺激T细胞并用Thapsigargin和EGTA干预后 ,用分别粘附细胞仪连续观察 10minT细胞 [Ca2 + ]i的变化 ,并评价 [Ca2 + ]i反应与CD3分子、InsP3 生成量和患者临床特征的相关性。结果显示 :正常人和SLE患者T细胞 [Ca2 + ]i反应的基准值相似 (P =0 10 5 ) ;SLE患者高峰值、平台值T细胞的 [Ca2 + ]i反应明显高于正常对照 (P <0 0 0 1,P <0 0 0 1) ;加入Thapsigargin后二者 [Ca2 + ]i反应无显著差异 ,而加入EGTA后二者 [Ca2 + ]i反应有显著差异 ;二者的T细胞CD3阳性率和InsP3 生成量无差异 (P =0 6 6 5 ,P =0 5 37) ;且 [Ca2 + ]i异常反应与患者的疾病活动性无关。这些结果提示 :SLE患者T细胞TCR/CD3介导的信号转导途径存在异常 ;SLE患者T细胞功能异常可能是因细胞内生物化学信号途径异常所致。     

系统性红斑狼疮患者外周血调节性T细胞、Foxp3和IL-6的表达

目的探讨系统性红斑狼疮(systemic lupus erythematosus,SLE)患者外周血CD4 CD25 调节性T细胞(regulatory Tcells,Tregs)、Foxp3mRNA和血浆IL-6表达的意义。方法对38例SLE患者和16例正常人采用流式细胞术检测外周血CD4 CD25 Tregs百分率,RT-PCR检测Foxp3mRNA表达,ELISA法检测IL-6水平。结果①SLE活动组和非活动组的CD4 CD25 Tregs水平均显著低于正常对照组(P<0.01);②SLE活动组的Foxp3mRNA表达水平明显低于正常对照组(P<0.05);③SLE活动组和非活动组血浆的IL-6水平均显著高于正常对照组(P<0.01),而且活动组显著高于非活动组(P<0.05);④38例SLE患者的CD4 CD25 Tregs水平与SLEDAI评分呈显著性负相关(P<0.01),Foxp3mRNA水平与CD4 CD25 Tregs呈显著性正相关(P<0.01),血浆IL-6水平与SLEDAI评分之间呈显著性正相关(P<0.01),血浆IL-6水平与CD4 CD25 Tregs/CD4 细胞比值呈显著负相关(P<0.05)。结论CD4 CD25 Tregs和Foxp3以及IL-6可能在SLE的发生和发展中发挥重要作用。     

SLE患者淋巴细胞Caspase-3和Annexin V/PI的定量检测

为了研究SLE患者外周血淋巴细胞 (PBL)在体外培养下细胞凋亡指标Caspase 3和AnnexinV/PI的变化 ,使用AnnexinV联合PI染色和FITC标记的ActiveCaspase 3抗体染色 ,流式细胞术检测 4 4例SLE患者和 30例正常人外周血淋巴细胞在体外培养 4 8h后淋巴细胞 (PBL )凋亡的发生率。结果显示在体外培养作用下 ,活动期SLE患者PBL凋亡率较正常人显著增高(P <0 0 1) ,而静止期则无明显差别 (P >0 0 5 )。SLE疾病活动指数SLEDAI,抗dsDNA抗体与淋巴细胞Caspase 3和AnnexinV/PI表达呈明显的正相关 (P <0 0 5 )。活动期SLE患者PBL凋亡较正常人显著增高。淋巴细胞凋亡与SLE疾病活动指数之间具有明显的相关性 ,表明SLE存在体内凋亡或凋亡相关性免疫机制失调     

SLE患者细胞粘附分子CD11a、CD18、CD54表达初探

利用流式细胞术及免疫荧光双染色法，检测３５例系统性红斑狼疮（ＳＬＥ）患者外周血细胞粘附分子表型（ＣＤ１１ａ、ＣＤ１８、ＣＤ５４）及淋巴细胞表型（ＣＤ３、ＣＤ４、ＣＤ８、ＣＤ４５、ＲＡ、ＣＤ４５ＲＯ）。结果表明，ＳＬＥ活动组ＣＤ８＋细胞增高，ＣＤ４＋ＣＤ４５ＲＡ＋细胞减少；ＣＤ４＋细胞表面ＣＤ１１ａ、ＣＤ１８表达降低，后二者在ＣＤ８＋细胞上表达增高；ＣＤ５４在ＣＤ２０＋细胞上增高。进一步发现，ＣＤ８＋细胞的ＣＤ１８增高与ＣＤ４＋ＣＤ４５ＲＡ＋细胞减少呈负相关（Ｐ＜００５），而与ＣＤ２０＋细胞表面ＣＤ５４增高呈正相关（Ｐ＜００１）。本文提示，细胞粘附分子可能在ＳＬＥ发病机理中占有重要意义。     

系统性红斑狼疮患者自身抗体检测及意义

目的：探讨自身抗体在系统性红斑狼疮（SLE）中的意义。方法：采用放射免疫分析检测50例SLE患者血清中的抗双链DNA（dsDNA）抗体,采用德国IMTEC公司抗核抗体谱线性印迹法检测抗核小体抗体（AnuA）、抗组蛋白抗体（AHA）、抗StuD1等其他自身抗体。结果：抗StuD1阳性率最高（82％）,其次是抗R060KD抗体（80％）和AunA（72％）;抗dsDNA、AHA、抗U1-RNP、抗R052KD、抗SSB的阳性率分别为44％、32％、58％、48％、24％。其他三种自身抗体阳性率很低。结论：SLE患者血清中可出现大量的自身抗体,同时检测多种自身抗体能提高对SLE的鉴别诊断。     

系统性红斑狼疮病人环孢素A受体mRNA的表达

目的 探讨静止期、活动期系统性红斑狼疮病人（SLE）外周血单个核细胞（PBMC）环孢素A受体（CyP）mRNA表达及糖皮质激素对其表达的影响,为临床应用环孢素A辅助治疗该病提供理论依据。方法 采用逆转录PCR方法,经凝胶图像半定量分析,检测患者外周血单个核细胞CyP mRNA的表达。结果 SLE病人外周血单个核细胞存在有CyPmRNA的表达,静止期较正常人差异无显著性（P＞0．05）意义,但在活动期CyPmRNA的表达较正常人和静止期病人明显降低（P＜0．01）,地塞米松处理后,活动期病人CyPmRNA的表达水平显著上升（P＜0．01）。结论 SLE病人有CyPmRNA的表达,但活动期明显下降,糖皮质激素可改善CyP mRNA的表达。     

Increased Microchimeric CD4 T Lymphocytes in Peripheral Blood from Women with Systemic Sclerosis

Recent studies have demonstrated the presence of microchimeric cells in peripheral blood and skin lesions from patients with systemic sclerosis (SSc). In a previous study we found that some peripheral blood CD3⁺ cells from female patients with SSc contained male DNA. Here, peripheral blood samples from 47 patients with SSc (30 with diffuse cutaneous SSc and 17 with limited cutaneous SSc) and 22 healthy controls were sorted for CD4⁺ and CD8⁺ T cells. Both positively and negatively selected populations were analyzed for male DNA by quantitative PCR. Analysis of Y chromosome sequences in the sorted cells demonstrated the presence of microchimerism in 82.9% of SSc patients compared to 63.6% of controls. The numbers of CD4⁺ and CD8⁺ T cells were found to be significantly higher in the SSc patients than in controls. Furthermore, patients with dcSSc were observed to have significantly more CD4⁺ microchimeric T cells than the controls. In the CD8⁺ T-cell population, there was a trend toward more microchimeric cells in the patients but this did not reach significance. These results support the hypothesis that microchimeric CD4⁺ T cells may be involved in the pathogenesis of SSc.     

CD226在系统性红斑狼疮患者T淋巴细胞亚群上的表达

目的：研究CD226在SLE患者外周血T淋巴细胞亚群上的表达，以阐明CD226抗原在SLE患者体内T细胞活化中作用以及与SLE发病的关系。方法：31例SLE患者和30例健康志愿者外周血单个核细胞，在体外培养72h后，三色荧光标记的单克隆抗体染色，利用流式细胞仪测定T细胞亚群细胞表面CD226抗原的表达。结果；SLE患者组的CD3^ 、CD4^ 、CD8^ T淋巴细胞上CD226^ 表达均高于正常对照组（P＜0．01）；活动期SLE组、静止期SLE组的CD3^ 、CD4^ 、CD8^ T细胞上CD226^ 表达均显著高于对照组（P＜0．01），而活动期与静止期患者之间T细胞亚群上CD226^ 表达则无显著性差异（P＞0．05）。SLE患者CD3^ 、CD4^ 、CD8^ T细胞CD226^ 抗原表达水平与SLEDAI之间无明显相关性（P＞0．05）。结论：SLE患者体内存在T细胞亚群异常活化；活动期、静止期SLET淋巴细胞CD226^＋表达均增高，CD226^ 可能参与了SLE的免疫发病。     

系统性红斑狼疮与遗传性补体缺陷相关性探讨

本文报道了二例经实验证实为补体 C_4缺陷的系统性红斑狼疮患者,长期追踪观察的结果表明,二例患者持续血清 C_4低水平,一例伴有 C_(3)缺陷的患者反复肺部感染.本文并对补体与系统性红斑狼疮间的相互关系进行了简要分析.     

系统性红斑狼疮皮肤表皮抗核抗体的探讨

本文对１９１例ＳＬＥ患者的“正常”皮肤进行了免疫荧光的研究，结果发现６．８％（１３／１９１）的患者伴有“体内”ＡＮＡ或称ＥＮＳ，其中以Ｓ型ＩｇＧ在表皮细胞核内沉积最为多见。同时与其他检测结果做了比较，未发现ＥＮＳ的核型或荧光强度受血清ＡＮＡ，抗ｄｓ－ＤＮＡ抗体，ＢＭＺ荧光染色的影响，因此我们认为，ＥＮＳ的出现对ＳＬＥ具有协助诊断价值。     

系统性红斑狼疮患者血清IV型胶原和层粘连蛋白测定的意义

为探讨血清IV型胶原 (IV C)和层粘连蛋白 (LN)在系统性红斑狼疮 (SLE)患者中的临床意义 ;我们采用放射免疫法(RIA)对 34例SLE和 6 3例正常人的血清IV C和LN含量进行了测定 ,并进行治疗前后对比以及血清IV C和LN水平与其它临床指标间的直线相关关系分析。结果发现SLE组血清IV C和LN均较对照组显著升高 (P <0 0 0 0 1) ;治疗后随病情缓解较治疗前明显降低 (分别为P <0 0 0 1;0 0 0 5 )。血清LN与血清白蛋白呈显著负相关 (P <0 0 0 1) ,与 2 4h尿蛋白定量、血清免疫球蛋白M和补体C3水平之间呈明显的正相关 (P <0 0 5 ) ;血清IV C与血沉呈显著正相关 (P <0 0 5 )。上述结果提示血清IV C和LN水平在SLE患者中普遍升高 ,是评估SLE患者病情活动的重要指标     

SLE患者检测血清ANCA的临床价值

目的 探讨抗中性粒细胞胞浆抗体（ANCA）在系统性红斑狼疮（SLE）患者中检测的临床意义.方法 通过间接免疫荧光法（IIF）检测57例SLE患者血清中的ANCA,对ANCA阳性血清采用免疫斑点法检测抗髓过氧化物酶（MPO）和蛋白酶3（PR3）抗体;同时以35例正常健康者作为对照组.回顾性分析SLE临床表现和实验室检查结果,SLE患者以SLE disease activity index（SLEDAI）分组（SLEDAI≥10为疾病活动组、〈10为疾病非活动组）,分析ANCA与其的相关性.结果 SLE患者中ANCA 阳性率为22.8%,其中核周型（pANCA）阳性12例,阳性率为 21.1%,胞浆型（cANCA）1例,阳性率为 1.7%,靶抗原均为非MPO、PR3;ANCA阳性组与ANCA阴性组SLE活动性存在显著性差异（P〈0.05）,ANCA阳性组患者的补体C3的下降、血沉（ESR）的增高、抗dsDNA抗体的阳性以及皮肤血管炎和肾脏损伤与ANCA阴性组比较,差异有统计学意义（P〈0.05）.结论 ANCA在SLE中有一定阳性检出率,对疾病活动性判断有一定的临床价值.     

Bladder cancer immunogenicity: expression of CD80 and CD86 is insufficient to allow primary CD4+ T cell activation in vitro

Transitional cell carcinomas (TCC) of the urinary bladder are known to express proteins which can yield potentially immunogenic peptide epitopes for expression in the context of cell surface class I or class II MHC antigens. However, additional costimulatory ligands must also be expressed before such a cell might directly induce full activation and proliferation of resting, antigen-specific T lymphocytes. Intravesical therapy might be used to manipulate T cell costimulation in order to promote specific rejection of TCC cells. This in vitro study examined the potential of such a strategy by transfection of the prototypical TCC line J82 with the important costimulatory molecules CD80 (B7-1) and CD86 (B7-2). Untransfected J82 cells expressed class I and II MHC antigens, a range of cell adhesion molecules, though did not induce T cell proliferation in a robust, allogeneic co-culture system. Transfected J82 cells expressed CD80 or CD86 at levels comparable to an antigen-presenting B cell line. Furthermore, functional surface expression of CD80 and CD86 was demonstrated in a mitogen-dependent assay of costimulation. However, neither CD80+ nor CD86+ transfectant J82 cells could induce significant proliferation of antigen-specific CD4+ T cells. Further analysis showed that bystander J82 cells could inhibit independent T cell activation in an effect dependent on direct cell contact. This inhibitory effect was associated with increased cell death in the responding lymphocyte population and is concordant with surface expression of CD95L by the J82 cell line.     

CD80和CD86在肾细胞癌组织中的表达

目的　观察肾细胞癌细胞中共刺激分子CD80 (B7- 1)和CD86(B7- 2 )的表达 ,以了解共刺激途径在肾细胞癌的肿瘤免疫中的作用和意义。方法　以正常肾组织和癌周组织为对照 ,采用免疫组织化学方法观察肾细胞癌组织中CD80 (B7-1)和CD86(B7- 2 )的表达。结果　CD80和CD86在肾细胞癌组织中的表达的阳性率明显低于癌周组织和正常肾组织 (P <0 0 5 ) ,但癌周组织与正常肾组织的CD80和CD86表达的阳性率无显著差别 (P >0 0 5 )。结论　共刺激分子CD80和CD86在肾细胞癌组织中呈低水平表达。肾细胞癌组织低水平表达共刺激分子可能与肿瘤细胞“逃避”机体的免疫攻击有关。     

Genetic Contribution to Carotid Vascular Disease in Patients with Systemic Lupus Erythematosus

Objective We investigated whether stromelysin, a candidate gene in atherogenesis, plays a role in atherogenesis of systemic lupus erythematosus (SLE), a leading cause of mortality in SLE. Patients and Methods A genetic study using polymorphism located in the promoter region of stromelysin was performed in 55 Italian patients with SLE. Carotid intimal-medial thickness (IMT) was evaluated by B mode ultrasonography. Results All patients with an “abnormal” (≥0.9 mm) IMT carried at least one 6A allele, and the degree of IMT was significantly greater in patients carrying at least one 6A allele (0.63 ± 0.22 vs 0.43 ± 0.04 mm, 5A/6A + 6A/6A vs 5A/5A, p = 0.018). Conclusion Our data show that polymorphism of stromelysin promoter may be relevant for SLE-related cardiovascular disease.