HCMV感染对单核细胞HLA－DR表达的影响

本文采用细胞ＥＬＩＳＡ法，研究发现人巨细胞病毒（ＨＣＭＶ）感染对单核细胞ＨＬＡ－ＤＲ的影响。结果表明ＨＣＭＶ感染后１ｄ，单核细胞ＨＬＡ－ＤＲ表达显著增高（Ｐ＜０．０１），以后逐渐降低，ｄ５降至对照水平；ＩＦＮγ（５００Ｕ／ｍｌ）．ＴＮＦ（２５０Ｕ／ｍｌ）、ＩＬ－６（５００／ｍｌ）、ＩＬ－１（５００／ｍｌ）均能不同程度地刺激单核细胞ＨＬＡ－ＤＲ表达；ＨＣＭＶ感染后，细胞因子刺激ＨＬＡ－ＤＲ表达的水平在感染后ｄ５，较对照组均显著降低（Ｐ＜０．０１）；ＩＬ－１＋ＩＦＮ－γ及ＴＮＦ＋ＩＦＮ－γ在刺激单核细胞ＨＬＡ－ＤＲ表达时有协同作用；ＨＣＭＶ感染后，ＩＦＮ－γ＋ＩＬ－１及ＴＮＦ＋ＩＦＮ协同刺激单核细胞ＨＬＡ－ＤＲ表达水平较对照组显著降低（Ｐ＜０．０１）。结果提示：在ＨＣＭＶ感染引起免疫抑制过程中，其引起单核细胞ＨＬＡ－ＤＲ表达降低是一重要机制。     

HCMV感染对单核细胞HLA－DR表达的影响

本文采用细胞ＥＬＩＳＡ法，研究发现人巨细胞病毒（ＨＣＭＶ）感染对单核细胞ＨＬＡ－ＤＲ的影响。结果表明ＨＣＭＶ感染后１ｄ，单核细胞ＨＬＡ－ＤＲ表达显著增高（Ｐ＜０．０１），以后逐渐降低，ｄ５降至对照水平；ＩＦＮγ（５００Ｕ／ｍｌ）．ＴＮＦ（２５０Ｕ／ｍｌ）、ＩＬ－６（５００／ｍｌ）、ＩＬ－１（５００／ｍｌ）均能不同程度地刺激单核细胞ＨＬＡ－ＤＲ表达；ＨＣＭＶ感染后，细胞因子刺激ＨＬＡ－ＤＲ表达的水平在感染后ｄ５，较对照组均显著降低（Ｐ＜０．０１）；ＩＬ－１＋ＩＦＮ－γ及ＴＮＦ＋ＩＦＮ－γ在刺激单核细胞ＨＬＡ－ＤＲ表达时有协同作用；ＨＣＭＶ感染后，ＩＦＮ－γ＋ＩＬ－１及ＴＮＦ＋ＩＦＮ协同刺激单核细胞ＨＬＡ－ＤＲ表达水平较对照组显著降低（Ｐ＜０．０１）。结果提示：在ＨＣＭＶ感染引起免疫抑制过程中，其引起单核细胞ＨＬＡ－ＤＲ表达降低是一重要机制。     

EB病毒潜在膜蛋白对鼻咽癌细胞系CNE1生长及HLA表达的影响

目的研究ＥＢＶ－ＬＭＰ对高分化鼻咽癌细胞株ＣＮＥ１生长及ＨＬＡ表达的影响。方法以人高分化鼻咽癌细胞株（ＣＮＥ１）为对象，采用电穿孔基因转染技术，将重组ＥＢＶ－ＬＭＰ表达质粒ｐＣＭＶａ－ＬＭＰ转染ＣＮＥ１细胞。用细胞体外增殖试验、免疫组化和流式细胞术等方法，观察细胞生长及ＨＬＡ表达的变化。结果ＥＢＶ－ＬＭＰ在体外可明显促进ＣＮＥ１细胞的增殖，增殖吸光度（Ａ）比值试验组与空白组及阴性对照组比较有显著性差异（Ｐ＜０．０１）；实验组细胞软琼脂克隆形成率显著高于空白及阴性对照组（Ｐ＜０．０１）；细胞ＤＮＡ含量明显增高（Ｐ＜０．０１／０．０５）；ＦＣＭ法测定细胞角蛋白表达，实验组比空白及阴性对照组阳性率显著降低（Ｐ＜０．０５）；ＨＬＡ免疫组化检测结果表明，ＬＭＰ表达细胞系ＨＬＡⅠ类及Ⅱ类抗原的表达都明显下降（Ｐ＜０．０１）。结论ＥＢＶ－ＬＭＰ对ＣＮＥ１细胞生长有明显的促进作用且可明显抑制细胞分化，ＬＭＰ可致鼻咽癌细胞ＨＬＡ抗原的表达改变。     

EBV-LMP及二甲基亚砜对人鼻咽癌细胞生长分化的影响

目的：研究ＥＢＶ－ＬＭＰ及二甲基亚砜（ＤＭＳＯ）对人鼻咽癌（ＮＰＣ）细胞体外生长分化的影响。方法：以人高分化鼻咽癌细胞株（ＣＮＥ１）为对象，采用电穿孔基因转染技术，将重组ＥＢＶ－ＬＭＰ表达质粒转染ＣＮＥ１细胞，以载体质粒转染及ＣＮＥ１细胞为对照，用细胞体外增殖实验、流式细胞仪和免疫组化等方法，观察细胞生长分化的变化情况。结果：ＥＢＶ－ＬＭＰ在体外可明显促进ＣＮＥ１细胞的增殖，实验组与空白组及阴性对照组比较Ｐ＜０．０１，实验组Ｓ期细胞明显增多，细胞角蛋白表达显著下降（Ｐ＜０．０５），有向低分化鳞癌发展倾向；ＤＭＳＯ诱导后ＣＮＥ１细胞增殖力明显下降（Ｐ＜０．０１），细胞角蛋白表达显著增高（Ｐ＜０．０１）；ＬＭＰ可明显抑制ＤＭＳＯ对ＣＮＥ１细胞的诱导分化作用，转染细胞诱导后增殖力和角蛋白表达无显著改变（Ｐ＞０．０５）。结论：ＤＭＳＯ可在一定程度上诱导ＣＮＥ１细胞分化；ＥＢＶ－ＬＭＰ对ＣＮＥ１细胞生长有明显的促进作用，可抑制细胞分化及降低细胞对终末分化信号的反应，有助于深入研究ＮＰＣ的发生机理及防治     

IL－4对多发性骨髓瘤患者外周血细胞CD20及HLA－DR表达的影响

本文报道用流式细胞分析技术，检测了２８例多发性骨髓瘤（ＭＭ）患者和２０名健康对照者外周血Ｂ细胞（ＣＤ２０＋）以及Ｂ、Ｔ和单核细胞中ＨＬＡ－ＤＲ＋细胞比率。结果发现，ＭＭ患者ＣＤ２０＋以及Ｂ、Ｔ及单核细胞中ＨＬＡ－ＤＲ＋细胞比率与正常对照组差异非常显著（Ｐ＜０．０１）。加入重组ＩＬ－４，可使８名ＭＭ患者ＣＤ２０＋、ＨＬＡ－ＤＲ＋ＣＤ２０＋、ＨＬＡ－ＤＲ＋单核细胞比率提高非常显著（Ｐ＜０．０１）。而在Ｔ细胞，Ｐ值则＞０．０５。我们认为由于ＩＬ－４分泌减少，一方面使多克隆Ｂ细胞激活及增殖受抑，另一方面使单核细胞ＨＬＡ－ＤＲ抗原表达减少，抗原提呈能力下降可能是ＭＭ发生多克隆免疫球蛋白抑制的重要原因。     

SRBC膜提取物对猪PBMNC第二信使的影响

胰酶水解绵羊红细胞（ＳＲＢＣ）释放膜表面活性蛋白组分Ⅲ（ＴＲＦ－Ⅲ），单独作用可使猪外周血单个核细胞（ＰＢＭＮＣ）胞内ｃＡＭＰ水平升高，以１００μｇ／ｍｌ浓度刺激达最高峰，由对照组０．９４±０．１４ｐｍｏｌ／Ｌ升高到２．７５±０．２５ｐｍｏｌ／Ｌ（Ｐ＜０．０１）。如果ＰＢＭＮＣ事先与腺苷酸环化酶（ＡＣａｓｅ）抑制剂ＬｉC１孵育后再以ＴＲＦ－Ⅲ或ＰＡＨ刺激。ｃＡＭＰ增高受到抑制（Ｐ＜０．０１）；而ＥＤＴＡ－２Ｎａ（一种磷酸二酯酶ＰＤＥ抑制剂）对此ｃＡＭＰ升高无影响。结果提示，此ｃＡＭＰ升高主要是通过活化ＡＣａｓｅ水解ＡＴＰ生成ｃＡＭＰ，而不像是抑制ＰＤＥ减少ｃＡＭＰ降解引起的。ＴＲＦ－Ⅲ诱导猪ＰＢＭＮＣ胞内Ｃａ~(２＋)浓度升高，以１００μｇ／ｍｌ刺激２分钟升高最多，由对照组的２４２±７ｎｍｏｌ／Ｌ升高到３２３±１５ｎｍｏｌ／Ｌ（Ｐ＜０．０１）。以ＥＧ－ＴＡ除去胞外Ｃａ~(２＋)再以ＴＲＦ－Ⅲ或ＰＡＨ刺激，仅观察到小范围［Ｃａ~(２＋)］ｉ升高。看来这一过程包括了刺激胞内Ｃａ~(２＋)释放和胞外Ｃａ~(２＋)内流两种方式。以上结果证明，ＴＲＦ－Ⅲ对淋巴细胞功能影响与细胞内第二信使有关。     

PCR法检测EB病毒BNLF1基因

目前已建立分子杂交和ＰＣＲ检测ＥｐｓｔｅｉｎＢａｒｒ病毒（ＥＢＶ）ＤＮＡ的方法。近年来研究发现ＥＢＶ致癌作用与ＬＭＰ１蛋白的表达密切相关〔１〕。为此,我们针对ＥＢＶ表达ＬＭＰ１蛋白的ＢＮＬＦ１基因片段建立ＰＣＲ检测方法。１　材料与方法１１　标准病毒和对照病毒　含有ＥＢＶ的Ｒａｊｉ细胞系和带有ＰＧＥＭＩＢＮＬＦ１的菌种有美国国立卫生研究院（ＮＩＨ）Ｊａｃｋｓｏｎ博士赠送。ＨＣＭＶＡＤ１６９、ＨＳＶⅠ、ＶＺＶ购自于上海第二医科大学。１２　主要试剂与仪器　限制性内切酶ＳｔｙＩ,Ｍａｒｋｅｒ购…     

ER阳性和ER阴性人乳腺癌细胞株p53、mdm-2及p21~(WAF1)蛋白表达的研究

目的研究ＥＲ阳性和ＥＲ阴性人乳腺癌细胞株ｐ５３、ｍｄｍ－２和ｐ２１ＷＡＦ１蛋白的表达及其与细胞生物学特性的关系。方法应用细胞培养、基因转染和免疫组化染色ＬＳＡＢ法等技术，检测ＥＲ阳性、表达野生型ｐ５３（ｗｔｐ５３）蛋白的ＭＣＦ－７细胞和ＥＲ阴性、表达突变型ｐ５３（ｍｔｐ５３）的ＭＤＡ－ＭＢ－２３１细胞以及ＥＲ转染阳性ＭＤＡ－ＭＢ－２３１细胞中ｐ５３、ｍｄｍ－２和ｐ２１ＷＡＦ１蛋白的表达水平，比较其与细胞生物学特性的关系。结果（１）ＭＣＦ－７细胞和ＭＤＡ－ＭＢ－２３１细胞ｐ５３蛋白的性质和分布明显不同，前者ｐ２１ＷＡＦ１和ｍｄｍ－２蛋白的表达水平明显高于后者（Ｐ＜０．０５），且前者的生物学特性较后者为好。（２）ＥＲ质粒转染ＭＤＡ－ＭＢ－２３１细胞后，其ｐ５３蛋白的表达水平降低（Ｐ＜０．０５），而ｍｄｍ－２蛋白的表达水平增加（Ｐ＜０．０５），生物学特性得以改善。结论乳腺癌细胞ＥＲ状态与ｐ５３和ｍｄｍ－２蛋白的表达水平以及生物学特性有关。     

GM-CSF诱导外周血单核细胞的分化及其对混合淋巴细胞反应的影响

作者对 Ｇ Ｍ Ｃ Ｓ Ｆ 作用下的外周血单核细胞（ Ｐ Ｍ Ｃ） 的形态特征及免疫表型进行了测定, 并观察了其对混合淋巴细胞反应（ Ｍ Ｌ Ｒ） 的影响。结果显示, Ｇ Ｍ Ｃ Ｓ Ｆ 可使外周血单核细胞分化为 Ｃ Ｄ１４ ＋ 、 Ｃ Ｄ１ａ 或低表达、 Ｃ Ｄ８０ 、 Ｃ Ｄ８６ 低表达、 Ｈ Ｌ Ａ Ｄ Ｒ＋ 、 Ｃ Ｄ１１ａ ＋ 、 Ｃ Ｄ４５ Ｒ Ａ＋ , 和非特异性酯酶呈强阳性反应的细胞, 符合巨噬细胞的形态及表型特征。在 Ｍ Ｌ Ｒ 体系中加入上述细胞, 发现其 Ｍ Ｌ Ｒ 的结果因巨噬细胞含量的不同而异, 巨噬细胞与反应细胞比例为１∶２ 时抑制 Ｍ Ｌ Ｒ（ Ｐ＜ ００５ ） , １∶４或１∶８ 时刺激 Ｍ Ｌ Ｒ（ Ｐ＜ ００５ ） ; Ｐ Ｈ Ａ 和 Ｉ Ｌ ２ 能够逆转大剂量巨噬细胞对 Ｍ Ｌ Ｒ 的抑制作用, 抗 Ｃ Ｄ３ 单抗可增强其对 Ｍ Ｌ Ｒ 的抑制作用, 消炎痛不影响巨噬细胞对 Ｍ Ｌ Ｒ 的作用。     

MDR相关性单克隆抗体MGr－1逆转胃癌细胞耐药的体外研究

目的：研究胃癌细胞耐药相关性单克隆抗体ＭＧｒ－１对耐长春新碱胃癌细胞（ＳＧＣ７９０１／ＶＣＲ）多药耐药性（ＭＤＲ）的影响。方法：用ＭＴＴ法检测阿霉素的细胞毒性；用流式细胞仪检测阿霉素在细胞内的蓄积及潴留。结果：ＭＧｒ－１能明显逆转ＳＧＣ７９０１／ＶＣＲ细胞对阿霉素的耐药性（Ｐ＜０．０１），并可增加ＳＧＣ７９０１／ＶＣＲ细胞内阿霉素的蓄积（Ｐ＜０．０１）及潴留（Ｐ＜０．０１）。结论：ＭＧｒ－１具有通过增加细胞内药物蓄积及潴留逆转ＳＧＣ７９０１／ＶＣＲ细胞耐药性的功能。提示ＭＧｒ－１所对应的细胞膜抗原可能为一种新的有活性功能并与ＭＤＲ相关的分子。     

系统性红斑狼疮患者外周血淋巴细胞表达BLyS和CD38的变化

目的:研究系统性红斑狼疮(SLE)患者外周血淋巴细胞表达BLyS和CD38的变化。方法:收集22名SLE患者和14名健康人外周血淋巴细胞, 用流式细胞仪检测外周血淋巴细胞表达BLyS和CD38的变化。结果:SLE患者外周血BLyS⁺淋巴细胞、CD19⁺淋巴细胞和CD19⁺CD38⁺淋巴细胞显著增加, BLyS⁺淋巴细胞增加与CD19⁺CD38⁺淋巴细胞增加呈正相关(r=0.434, P<0.05).结论:SLE患者外周血淋巴细胞表达BLyS和CD19⁺B淋巴细胞表达CD38均显著增加, 且二者增加呈正相关。     

sCD23在SLE患者血清中的检测

目的了解ｓＣＤ２３及ＣＤ２３在系统性红斑狼疮（ＳＬＥ）发病中的变化及意义。方法采用双抗体夹心ＥＬＩＳＡ法、ＳＰ及ＡＰＡＡＰ免疫组化法检测ＳＬＥ患者血清ｓＣＤ２３水平、皮损及外周血单个核细胞（ＰＢＭＣ）ＣＤ２３表达,对ｓＣＤ２３及ＣＤ２３同ＡＮＡ、抗ｄｓＤＮＡ抗体关系进行了比较。结果①病人组血清ｓＣＤ２３水平〔（４．１０±３．１６）ｎｇ／ｍｌ〕与正常对照组〔（１．４８±０．４１）ｎｇ／ｍｌ〕比较显著增高（Ｐ＜０．００５）,活动期水平明显高于静止期;②血清ｓＣＤ２３与ＡＮＡ滴度、抗ｄｓＤＮＡ抗体等具有明显的平行关系;③皮损表皮少数（３／９）弱表达ＣＤ２３,ＰＢＭＣ则明显表达ＣＤ２３。结论ＣＤ２３及ｓＣＤ２３在ＳＬＥ发病中有一定的意义,其主要作用可能与抗原处理和递呈以及促进Ｂ淋巴细胞分化、增殖产生自身抗体有关,而且ｓＣＤ２３是监测ＳＬＥ疾病活动程度一个很好的指标     

Evidence for lytic infection by Epstein-Barr virus in mucosal lymphocytes instead of nasopharyngeal epithelial cells in normal individuals.

Normal nasopharyngeal tissues from 23 individuals who died of causes unrelated to the upper respiratory system and had no evidence of Epstein-Barr virus (EBV)-related diseases were studied using in situ hybridisation (ISH) and immunohistochemistry for the detection of EBV RNA and expression of EBV proteins, respectively. ISH using ³⁵S-labelled riboprobe for EBV EBER RNA showed occasional to a few EBER + lymphocytes in the stroma of nasopharyngeal mucosa in 14/16 cases with available paraffin-embedded tissues. In addition, very rare intraep-ithelial EBER+ lymphocytes were also detected in 3/16 cases. However, in none of these cases was EBER detected in the epithelial cells. Similar results were obtained using a nonradioactive ISH method for EBER (Dako). In 3/23 cases, im-munostaining using monoclonal antibodies for EBV proteins on cryostat sections showed occasional cells in the stroma expressing EBV nuclear antigen 2 (EBNA2), latent membrane protein-1 (LMP), and switch protein encoded by BZLF1 gene (ZEBRA) in two cases and only very rare LMP+ and ZEBRA+ cells in one other case. Double immuno-staining combining alkaline phosphatase anti-alkaline phosphatase (APAAP) for CD markers and indirect immunofluorescence for LMP showed that the LMP+ cells were either CD19+ or less frequently CD3+, but none were CD68+. These results show that both B and T lymphocytes harbouring EBV can be found in the normal nasopharyngeal tissues. Interestingly, EBV proteins associated with lytic viral replication—diffuse early antigen (EA-D), viral capsid antigen (VCA), or membrane antigen (MA)—were also detected in rare cells in the stroma in one case, and in another case only one MA+ cell was detected. These results provide evidence for a lytic type of infection by EBV in the normal nasopharynx involving a very small proportion of stromal lymphocytes and support the view that nasopharyngeal lymphocytes can act as a reservoir for EBV in normal individuals. © 1995 Wiley-Liss, Inc.     

Soluble CD23 levels are elevated in the serum of patients with primary Sjögren''s syndrome and systemic lupus erythematosus.

The low affinity IgE receptor Fc epsilon RII (CD23) is important in several aspects of T and B cell function. In this study serum levels of soluble CD23 (sCD23) were measured in three groups: 26 female patients with systemic lupus erythematosus (SLE), 21 females with primary Sjögren''s syndrome (pSS) and 25 normal healthy females. The concentration of sCD23 was determined using an enhanced chemiluminescent sandwich ELISA developed in this laboratory. Increased levels of sCD23 were observed in pSS and in SLE patients compared with controls (median 23.0 versus 8.6, P less than 0.0002 and 18.1 versus 8.6, P less than 0.002 respectively). While the median level of sCD23 was found to be higher in pSS than in SLE the difference was not statistically significant. Patients with SLE and pSS on glucocorticoid treatment had significantly lower levels of sCD23 than patients not on this treatment (median 28.9 versus 14.4, P less than 0.05). Amongst the control patients sCD23 was inexplicably lower in the female members relative to the males (median 8.5 versus 12.3, P less than 0.05). Although serum IgG and IgA levels were significantly elevated in pSS and SLE patients relative to controls there was no direct correlation between sCD23 and the serum levels of these immunoglobulins. We conclude that B cell hyperactivity which occurs in both pSS and SLE is associated with raised levels of sCD23.     

系统性红斑狼疮患者的Th2偏移不受CD40/CD154影响

目的 探讨系统性红斑狼疮(SEE)患者外周血Th极化状况的改变以及其受CD40/CD154和地塞米松(Dex)的影响.方法 使用ELISA法检测SEE患者和对照组血浆IFN-γ和IL-10水平,分离、培养外周血单个核细胞(PBMC),应用CD40 mAb和Dex进行干预,使用ELISA法检测培养液上清IFN-γ和IL-10水平.结果 SLE患者血浆IFN-γ水平明显低于对照组(P<0.01,P<0.05),活动期组血浆IL-10水平明显高于缓解期组和对照组(均P<0.01);CD40 mAb对PBMC培养液上清IFN-γ和IL-10水平无影响(均P>0.05);Dex可使SLE患者PBMC培养液上清IFN-γ水平升高(P<0.05,P<0.01),Dex可以明显降低SEE患者和对照组PBMC培养液上清IL-10水平(均P<0.05).结论 SEE患者血浆IFN-γ水平降低、IL-10水平增高,存在Th2偏移;此种改变不受CD40/CD154影响但能被Dex抑制.     

Analysis of expression and function of the inhibitory receptor ILT2 (CD85j/LILRB1/LIR-1) in peripheral blood mononuclear cells from patients with systemic lupus erythematosus (SLE)

The aim of this work was to study the expression and function of the inhibitory receptor ILT2/CD85j in peripheral blood mononuclear cells (PBMC) from patients with systemic lupus erythematosus (SLE). We studied 23 SLE patients as well as 17 patients with rheumatoid arthritis, 10 with fibromyalgia, and 23 healthy individuals. We found a variable level of expression of ILT2 in the PBMC from both SLE patients and controls, with no significant differences among them. However, when the expression of this receptor was assessed in cell subsets, significantly lower levels were detected in CD19+ lymphocytes from SLE patients compared with healthy controls. Functional assays performed in unfractionated PBMC, showed a significant diminished inhibitory activity of ILT2 in CD4+ and CD8+ cell subsets from SLE patients compared to either rheumatoid arthritis or fibromyalgia patients, and healthy individuals. Our results show that the PBMC from some patients with SLE show a defective expression of ILT2, and that most of them exhibit a poor function of this inhibitory receptor.     

Reduction of forkhead box P3 levels in CD4+CD25high T cells in patients with new-onset systemic lupus erythematosus

The aim of this study was to quantify and evaluate the forkhead box P3 (FoxP3) expression regulatory T cells in new-onset systemic lupus erythematosus (SLE) patients before and after treatment. Forty-four newly diagnosed and untreated SLE patients, including 24 with active disease (SLEDAI > or = 10) and 20 with inactive disease (SLEDAI < 5), were enrolled in this study. Twenty-one age- and sex-matched healthy volunteers were also included as controls. Peripheral blood samples were collected and mononuclear cells isolated. The expression of CD25 and FoxP3 in CD4(+) T cells were analysed with flow cytometry. CD4(+)CD25(+) (3.95-13.04%) and CD4(+)CD25(high) (0.04-1.34%) T cells in peripheral blood in untreated patients with new-onset active lupus were significantly lower than that in the patients with inactive lupus (7.27-24.48%, P < 0.05 and 0.14-3.07% P < 0.01 respectively) and that in healthy controls (5.84-14.84%, P < 0.05). Interestingly, the decrease in CD4(+)CD25(high) T cells was restored significantly in patients with active lupus after corticosteroid treatment. There was, however, a significantly higher percentage of CD4(+)FoxP3(+) T cells in patients with active (5.30-23.00%) and inactive (7.46-17.38%) new-onset lupus patients compared with healthy control subjects (2.51-12.94%) (P < 0.01). Intriguingly, CD25 expression in CD4(+)FoxP3(+) T cells in patients with active lupus (25.24-62.47%) was significantly lower than that in those patients with inactive lupus (30.35-75.25%, P < 0.05) and healthy controls (54.83-86.38%, P < 0.01). Most strikingly, the levels of FoxP3 expression determined by mean fluorescence intensity in CD4(+)CD25(high) cells in patients with active SLE were significantly down-regulated compared with healthy subjects (130 +/- 22 versus 162 +/- 21, P = 0.012). CD4(+)CD25(high) T cells are low in new-onset patients with active SLE and restored after treatment. Despite that the percentage of CD4(+)FoxP3(+) T cells appear high, the levels of FoxP3 expression in CD4(+)CD25(high) T cells are down-regulated in untreated lupus patients. There is a disproportional expression between CD25(high) and FoxP3(+) in new-onset patients with active SLE.     

儿童系统性红斑狼疮患者外周血淋巴细胞表面CD95的表达及临床意义

目的:探讨儿童系统性红斑狼疮(systemic lupus erythematosus,SLE)外周血淋巴细胞表达CD95的特征及与疾病活动性和其他免疫学指标间的关系.方法:使用流式细胞术检测60例SLE患儿和20例对照外周血T淋巴细胞亚群和B淋巴细胞表面CD95的表达,并分析其与SLE疾病活动性以及实验室检查之间的关系.结果:初发SLE患儿外周血中CD4+T细胞表面CD95的表达显著高于对照组,差异有统计学意义(P<0.05);初发SLE患儿外周血中CD19+B细胞表面CD95的表达显著高于健康儿童(P<0.05);CD19+CD95+B细胞的比例和SLE疾病活动性呈正相关(r=0.4,P<0.05);CD4+CD95+T细胞的比例和SLE疾病活动性呈正相关(r=0.3,P<0.05),CD4+CD95+T细胞的比例和外周血抗双链DNA抗体(anti-dsDNA Abs)的水平呈正相关(r=0.2,P<0.05);治疗后SLE患儿外周血中CD19+CD95+B细胞和CD4+CD95+T细胞的比例均有显著下降,差异有统计学意义(P<0.05).结论:儿童SLE患者外周血中淋巴细胞表达CD95的水平显著升高,且与SLE的疾病活动性及血清中抗双链DNA抗体相关,可以作为SLE的评价指标.     

茯苓多糖对系统性红斑狼疮患者Th17/Treg平衡的影响

目的:研究茯苓多糖对系统性红斑狼疮(SLE)患者外周血辅助性T细胞17(Th17)/调节性T细胞(Treg)平衡的免疫调节作用。方法:选取45例SLE患者和35例健康对照者,应用磁珠分选法分离外周血CD4~+ T细胞,流式细胞术检测CD4~+ T细胞中Th17和Treg细胞的比例。用茯苓多糖分别处理健康对照者及患者的CD4~+ T细胞,MTT法检测细胞活力以测定茯苓多糖毒性,ELISA检测细胞中白细胞介素17(IL-17)、IL-6、IL-10及转化生长因子β(TGF-β)的含量,RT-q PCR和Western blot法分别测定维甲酸相关孤儿受体γt(RORγt)与叉头框蛋白P3(Foxp3)的mRNA和蛋白表达水平。结果:与健康对照组相比,SLE患者的Th17细胞比例显著升高,Treg细胞比例明显降低(P0.05)。用100μg/L的茯苓多糖处理SLE患者CD4~+ T细胞,与空白对照组相比,IL-17和IL-6的含量显著降低,IL-10和TGF-β的含量明显上升(P0.05);RORγt的mRNA和蛋白表达显著下降,同时Foxp3的表达在mRNA和蛋白水平上明显增加(P0.05);并且Th17/Treg的比值降低(P0.05)。结论:茯苓多糖可以通过升高Treg并降低Th17细胞的比例,对SLE起到一定的治疗作用。     

Clinical usefulness of serum EBV DNA levels of BamHI W and LMP1 for Nasal NK/T-cell lymphoma

Quantitative real-time polymerase chain reaction (PCR) was utilized to measure serum EBV DNA levels of BamHI W fragment and latent membrane protein 1 (LMP1) in 20 nasal natural killer (NK)/T-cell lymphoma patients. Both serum EBV DNAs were detected at high levels in all patients, but the levels were below the limit of detection in all healthy controls. The BamHI Z fragment, Epstein-Barr-replication activator (ZEBRA) expression was detected in a small proportion (0.1-3%) of lymphoma cells from 10 (50%) of the patients. Patients with ZEBRA expression showed significantly higher DNA levels of BamHI W and LMP1 (P = 0.0081, P = 0.004), suggesting that EBV DNA may be caused by EBV replication from lymphoma cells. Kaplan-Meier and univariate analyses revealed that high DNA levels of BamHI W and LMP1 at pre-treatment and high BamHI W DNA level at post-treatment were associated with short disease-free survival and overall survival (P < 0.05, each). Although the DNA levels of BamHI W and LMP1 correlated significantly, their dynamics were not always parallel. Patients with low pre-treatment level of both EBV DNAs showed a favorable course, in contrast to patients with high pre-treatment level of both EBV DNAs who showed an aggressive course (P = 0.0085). More importantly, the high pre-treatment level of both EBV DNAs was determined as the only independent prognostic factor among various prognostic factors. These data suggest that simultaneous measurement of serum levels of both BamHI W and LMP1 DNAs may be useful for diagnosis, disease monitoring, and prediction of prognosis for nasal NK/T-cell lymphoma patients.