Th17细胞和Treg细胞与某些疾病关系的研究进展

初始CD4+T细胞受到外来抗原刺激后,经过增殖并分化为各种效应T细胞。在IL-12和IFN-γ的诱导下分化为Th1细胞,产生IFN-γ,促进机体细胞免疫,从而发挥抗感染、抗肿瘤作用;在IL-4诱导下分化为Th2细胞,分泌IL-4、IL-5和IL-13,     

胰岛素对初诊2型糖尿病患者Th1/Th2平衡的影响

目的探讨胰岛素对初诊2型糖尿病(T2DM)Th1/Th2细胞平衡的影响。方法选择30例初诊T2DM患者,20名年龄、性别匹配的健康志愿者为对照。T2DM接受单纯胰岛素(Ins)治疗12 w,于治疗后分别采血,运用三色流式细胞术检测IFN-γ和IL-4在Th1/Th2细胞内的表达。结果 T2DM Ins治疗前表达CD4+IFN-γ和CD4+IL-4的细胞百分比分别(1.99±0.28)%和(2.82±0.35)%,Th1/Th2比率为0.76±0.06,治疗后表达CD4+IFN-γ和CD4+IL-4的细胞百分比分别为(2.89±0.31)%和(2.23±0.27)%,Th1/Th2比率为1.35±0.08,治疗前后相比Th1细胞百分比显著升高(P<0.05),Th2细胞有所下降(P>0.05),治疗前后Th1/Th2比值相比差异有显著性(P<0.05)。T2DM Ins治疗后Th1、Th2细胞、Th1/Th2比值与正常对照组无明显差异。Homa B指数治疗后较治疗前也明显升高(P<0.05)。结论胰岛素能调节T2DM患者Th1/Th2的免疫失衡,有利于胰岛功能的恢复。     

哮喘患者树突状细胞分泌细胞因子的变化及其对Th1/Th2细胞因子的影响

目的观察过敏性哮喘(哮喘)患者外周血单个核细胞(PBMC)来源树突状细胞(DC)分泌IL-12和IL-10的情况,及其对Th1/Th2型细胞因子平衡的影响.方法分别取9例哮喘患者和14例正常人外周血PBMC来源的DC经LPS刺激使其发育为成熟DC(mDC).另取脐血初始T淋巴细胞(Th0).Th0和两组mDC共培养,通过ELISA法检测mDC分泌的IL-12和IL-10及辅助性T淋巴细胞(Th)分泌的IFN-γ和IL-4的含量.结果①哮喘组DC产生IL-12及其亚单位IL-12p40和IL-10较对照组显著降低(P＜0.01、P＜0.05).②哮喘组Th释放Th1型细胞因子IFN-γ较对照组减少(P＜0.05);Th2型细胞因子IL-4较对照组显著增多(P＜0.01).③两组IL-12和IFN-γ均呈正相关(r＝0.7581、P＜0.01,r＝0.6028、P＜0.05),IL-12和IL-4均呈负相关(r＝-0.7498、P＜0.01,r＝-0.7481、P＜0.01).④哮喘组IL-10与IFN-γ呈正相关(r＝0.6437,P＜0.05).⑤两组IL-12和IL-10均呈正相关(P均＜0.01).结论哮喘患者DC分泌IL-12和IL-10减少,导致Th0向Th2优势分化,细胞因子平衡向Th2型倾斜,合成IL-4增多和IFN-γ减少,后者是哮喘发生的重要机制之一.     

日本血吸虫感染小鼠肠系膜淋巴结Th17细胞的免疫应答

目的观察C57BL/6小鼠感染日本血吸虫后肠系膜淋巴结Th17细胞的免疫应答。方法 20只C57BL/6小鼠随机分为感染组和对照组,每组10只,感染组小鼠经腹部皮肤感染日本血吸虫尾蚴,每鼠(40±5)条。感染后5~6周分离小鼠肠系膜淋巴结的淋巴细胞,分别用抗小鼠CD3单克隆抗体(anti-CD3,1μg/ml)和抗小鼠CD28单克隆抗体(anti-CD28,1μg/ml)刺激,培养4 h后收集细胞,RT-PCR检测小鼠肠系膜淋巴结淋巴细胞中白细胞介素17(IL-17)和维甲酸相关孤独受体(ROR-γt)mRNA的转录水平;培养72 h后,ELISA检测细胞培养上清液IL-17和γ干扰素(IFN-γ)的含量。同时用佛波酯(PMA,10 ng/ml)和离子霉素(1μg/ml)刺激淋巴细胞5 h后,胞内细胞因子染色,流式细胞术检测Th17细胞的含量和其他细胞因子的产生。结果 ELISA检测结果显示,感染小鼠肠系膜淋巴结培养物上清液中IFN-γ[(214.3±62.6)pg/ml]和IL-17[(176.8±62.1)pg/ml]的含量明显高于健康小鼠[(46.7±13.9)和0 pg/ml](P<0.05)。RT-PCR检测结果显示,IL-17和ROR-γt mRNA转录水平也明显高于健康小鼠。感染小鼠肠系膜淋巴细胞CD4+T细胞中,Th17细胞的比例为(0.55±0.03)%,明显高于健康小鼠[(0.16±0.01)%](P<0.05)。在CD4+T细胞中,IL-17+IL-4+细胞占0.06%,IL-17+IFN-γ+和IL-17+IL-5+细胞各占0.02%,IL-17+IL-9+细胞占0.01%,未检测到IL-17+IL-10+和IL-17+Foxp3+细胞。结论日本血吸虫感染C57BL/6小鼠的肠系膜淋巴结能诱导Th17细胞产生。Th17细胞能分泌IL-4,及少量的IFN-γ、IL-5和IL-9,不分泌IL-10,也不表达Foxp3。     

强直性脊柱炎患者外周血Th1/Th2淋巴细胞类型

目的　通过检测强直性脊柱炎患者外周血中CD4+ 和CD8+ T淋巴细胞分泌细胞因子的情况 ,探讨T淋巴细胞亚群与强直性脊柱炎发病的关系。方法　建立三色流式细胞分析法对强直性脊柱炎患者和健康志愿者外周血中淋巴细胞的胞内细胞因子 (IFNγ、IL 4)和表面抗原 (CD4、CD8)进行分析。同时采用夹心酶联免疫吸附法测定血清中IFNγ和IL 4的水平。结果　无论是CD4+ 还是CD8+ T淋巴细胞 ,分泌IFNγ的细胞群要比分泌IL 4的细胞群多 ;IL 4主要由Th2细胞产生 ,而Th1分泌的IFNγ要比Th2多 ;患者的Th1或Th2型细胞数与炎症活动指标呈负相关。与对照组相比 ,强直性脊柱炎患者外周血中Th1和Th2细胞在受刺激后并未增多。患者外周血中IFNγ水平明显升高 ,而IL 4水平无显著变化 ;IFNγ水平与炎症活动指标无明显相关性。结论　在强直性脊柱炎患者的外周血淋巴细胞中 ,以Th1型细胞为主。但Th1细胞在受刺激后分泌细胞因子的能力比Th2细胞低。     

菌血症患者外周血Th1、Th2细胞水平的变化研究

正常机体的CD4 T淋巴细胞根据其分泌细胞因子的不同可分别称为Th1、Th2,Th1细胞主要分泌TNF、IFN-γ、IL-2,Th2主要分泌IL-4、IL-5、IL-10等,它们发挥着不同的功能[1]。Th细胞之间的失衡与自身免疫病、过敏性疾病、肿瘤、移植排斥反应以及感染性疾病的发生发展有密切的关系。近     

HBsAg负载的慢性乙肝患者DCs诱导特异性Th1细胞分化的作用

目的:研究HBsAg负载的慢性乙肝患者外周血树突状细胞(dendritic cells,DCs)对自身Th1细胞分化的诱导作用.方法:Fico11密度梯度离心和贴壁法分离慢性乙肝患者外周血单核细胞,以含ThIL-4 rhGMCSF的完全培养基诱导DCs.流式细胞术检测各组DC表面CD80,CD86,CD40和HLA-DR分子的表达,CCK-8法检测各组DCs刺激同种异体淋巴细胞增殖的能力,ELISA法检测各组DCs培养液上清中IL-12的水平.免疫磁珠分选慢性乙肝患者外周血CD4 T细胞,分别与患者自身的DCs共培养,细胞内细胞因子染色,流式细胞仪检测共培养后CD4 T细胞内特征性细胞因子IFN-γ和IL-4,ELISA法检测共培养上清中IFN-γ/IL-4的水平.结果:与对照组相比,HBsAg、IFN-γ和HBsAg IFN-γ组DCs表面表达CD80,CD86,CD40和HLA-DR分子水平较高;刺激同种异体淋巴细胞增殖的能力较强;DCs分泌的上清液中、IL-12水平也较高.与对照组相比,HBsAg、IFN-γ和HBsAg IFN-γ组DCs与自身Th细胞共培养后,Th1细胞占CD4 T细胞的百分比升高(10.76%±3.98%,11.43%±4.32%,15.28%±4.73% vs 7.84%±3.10%,P＜0.01),Th2细胞占CD4 T细胞的百分比降低(1.43%±0.96%.1.68%±0.16%,0.92%±0.21% vs 2.61%±1.27%,P＜0.01),共培养上清中IFN-γ的水平增高(578±47 mg/L,496±92 mg/L,784±97 mg/L vs 342±34 meg/L,P＜0.05),IL-4的水平降低(187±52 mg/L,169±38 mg/L,89±37 mg/L vs 226±48 mg/L,P＜0.05),以HBsAg IFN-γ组最为明显.结论:经HBsAg负载的DCs可以改善患者体内因DCs功能低下而引起的Th1细胞分化不足的状态.     

肠系膜淋巴结Th1、Th17细胞在小鼠结肠炎模型发病中作用的研究

背景:大量研究表明细胞因子网络在溃疡性结肠炎(UC)的发病和疾病进程中起关键作用,但相关研究主要集中于肠黏膜免疫细胞方面。目的:探讨肠系膜淋巴结Th1、Th17细胞在模拟人类UC的小鼠DSS结肠炎模型发病中的作用。方法:C57BL/6小鼠饮用5%DSS溶液7 d诱导实验性结肠炎,实验过程中每天评估疾病活动指数(DAI)。于第8 d处死小鼠,ELISA法测定结肠组织IL-1β含量;分离肠系膜淋巴结细胞,以CD3/CD28单抗诱导淋巴细胞活化并以ELISA法测定细胞培养上清液中的Th1、Th17细胞因子含量,流式细胞术检测肠系膜淋巴结F4/80+CD11b+巨噬细胞和CD4+T细胞内Th1、Th17细胞因子表达。结果:结肠炎模型组DAI随实验进程而逐渐增加,于第7 d达峰值。与正常对照组相比,模型组结肠组织IL-1β蛋白表达显著上调(P<0.05),肠系膜淋巴结巨噬细胞浸润增加(P<0.001),淋巴细胞IL-17A分泌水平显著增高(P<0.05),IFN-γ分泌水平亦呈增高趋势(P>0.05),CD4+T细胞内IL-17A、IFN-γ表达显著上调(P<0.05)。结论:肠系膜淋巴结Th1、Th17细胞过度激活可能通过释放效应细胞因子诱导巨噬细胞等浸润、活化,参与介导小鼠DSS结肠炎模型的肠黏膜炎症反应和病理损伤。     

重症胸部创伤大鼠Th1／Th2平衡变化的实验研究

目的检测重症胸部创伤大鼠受伤后7d外周血单个核细胞（PBMC）培养上清液γ-干扰素（IFN-γ）、白细胞介素4（IL-4）水平,研究其Th1、Th2细胞功能的动态变化。方法雄性SD大鼠20只随机分为对照组与创伤组,创伤组大鼠进行胸部撞击建立重症胸部创伤模型,对照组进行假撞击。分别于受伤前及受伤后第1、3、5、7天取全血各1．0ml,分离PBMC体外培养72h,收集上清液冻存,ELISA法集中检测IFN-γ、IL-4浓度。结果两组大鼠伤后IFN-γ、IL-4水平均迅速升高,但创伤组IFN-γ水平低于对照组,而IL-4水平高于对照组。两组大鼠IFN-γ上升倍数／IL-4上升倍数（△IFN-γ/△IL-4）比值伤后均升高,创伤组在伤后第3天恢复1．0左右、并继续降低至0．34,对照组伤后7d内始终高于1．0。结论轻度创伤可以诱导大鼠Th1细胞功能加强;重症创伤大鼠在伤后早期以Th1细胞功能增强为主,创伤急性期后随着Th2细胞功能持续增强、Th1细胞功能受到抑制,发生Th1细胞向Th2细胞的漂移。     

Th17细胞与肝脏及相关疾病的研究进展

人体免疫类型包括特异性（获得性）免疫和非特异性（固有）免疫,其中特异性免疫主要由T淋巴细胞和B淋巴细胞参与。辅助性T细胞（Th细胞）由CD4＋T细胞分化成熟而来,在机体细胞免疫及体液免疫中发挥重要作用。1986年Mosmann等,将Th细胞根据其分泌的细胞因子以及在机体免疫中的不同作用,把Th细胞分为Th1和Th2细胞亚群［1］。在IFN-γ及IL-12的协同作用下,CD4＋T细胞分化成熟为Th1细胞,并分泌肿瘤坏死因子α（TNF-α）、γ干扰素（IFN-γ）、白介素（IL-2）等,在抗细胞内感染和细胞免疫反应中起到重要的作用。     

类风湿关节炎患者外周血Th17细胞的检测及意义

目的 探讨Th17细胞在类风湿关节炎(RA)患者外周血中的水平及意义.方法 分离RA患者和健康者外周血单个核细胞(PBMC),免疫磁珠阴选CD4~+T细胞,用或不用非特异性刺激剂(A-CD3、A-CD28),然后加佛波酯/离子霉素(PMA/Ion),经固定,透膜处理进行细胞内染色,流式细胞术(FCM)检测CD4~+T细胞内白细胞介素(IL)-17~+/干扰素(IFN)-γ~+、IL-17~+/IL-6~+水平.分组:①健康对照组;②RA病情稳定组;③RA病情活动组.结果 免疫磁珠阴选CD4~+T细胞纯度>90%.RA病情活动组IL-17表达水平(1.54±0.41)显著高于RA病情稳定组(0.70±0.21,P<0.01),二者又显著高于健康对照组(0.42±0.12,P<0.01).用A-CD3、A-CD28、IL-23刺激后,CD4~+T细胞IL-17胞内表达水平较无刺激组显著增加(P<0.05).CD4~+T细胞IFN-γ表达水平呈现与IL-17表达相似的特点,而RA患者与健康对照组IL-6表达水平差异无统计学意义.RA患者IL-17胞内表达水平与IFN-γ、IL-6无显著相关.结论 RA患者外周血CD4~+T细胞中存在异常增高的Th17细胞,且其水平与病情活动相关,有望作为判断RA患者病情活动的指标之一.     

急性冠状动脉综合征患者外周血中辅助性T细胞亚群失衡促进血管内皮细胞的损伤作用

目的 分析急性冠状动脉综合征(ACS)和稳定性心绞痛(SAP)患者外周血中1型辅助性T细胞2型辅助性T细胞(Th1/Th2)的变化,探讨Th细胞在ACS中的变化及对血管内皮细胞损伤的作用.方法 收集40例ACS患者和18例SAP患者的外周血,检测外周血中Th1/Th2相关细胞因子的浓度,及不同细胞哑群对人脐静脉内皮细胞(HUVEC)的杀伤作用.结果 ACS组外周血中干扰素-γ(IFN-γ)和白细胞介素-2(IL-2)的浓度,均高于SAP组[IFN-γ:(131.2±42.2)ng/L比(47.6±20.2)ng/L,P<0.05;IL-2:(83.7±21.3)ns/L比(46.2 ±16.7)ng/L,P<0.05],ACS组外周血中IL-10浓度低于SAP组[(16.7±4.3)ng/L比(27.5±5.5)ns/L,P<0.05];ACS组患者的外周血单个核细胞(PBMC)对HUVEC的杀伤作用较SAP组明显增强(PBMC:28.84%±4.20%比20.28%±2.71%,P<0.05),而ACS组患者清除CD4+T细胞的PBMC[(CD4-)-PBMC]对HUVEC的杀伤作用与SAP组比较,差异无统计学意义[(CD4-)-PBMC:20.70%±3.26%比20.28%±2.71%,P>0.05].结论 ACS患者Th1亚群相关细胞凶子水平明显高于SAP患者,Th2亚群相父细胞因子水平显著低于SAP患者,Th1/Th2亚群失衡在PBMC对血管内皮的损伤中起促进作用,提示Th1/Th2亚群失衡可能参与了ACS的发生.     

强直性脊柱炎患者外周血T细胞亚群的变化及意义

目的探讨强直性脊柱炎（AS）患者外周血中T细胞亚群的变化及其意义。方法采用流式细胞仪（FCM）检测外周血淋巴细胞表面CD3、CD4、CD8及其胞质内细胞因子IFN-γ和IL-4的表达。结果与正常对照组相比,As患者外周血Th细胞（CD;CD4＋）百分率无显著差异,Tc细胞（CD;CD;）明显升高（P〈0．05）;Th1细胞（CD3^＋CD4^＋IFN-γ^＋）百分率明显升高,Th2细胞（CD3^＋CD4^＋IL4^＋）无显著性差异;Te1细胞（CD3^＋CD8^＋IFN-γ^＋）百分率明显降低,T02细胞（CD3^＋CD8^＋IL4^＋）无显著性差异。结论AS患者外周血T细胞Th1／Th2、Tcl／Tc2亚群比例失衡,呈Th1、Tc2优势型。     

Toll样受体2介导的Th17细胞活化在HBV感染中的作用

目的探讨乙型肝炎患者外周血单个核细胞(PBMC)中Toll样受体2(TLR2)与Th17细胞的相关性,为阐述HBV感染诱导炎症应答机制提供理论和实验依据。方法选取2012年7月-2013年7月唐都医院感染科门诊和住院的34例乙型肝炎初治患者,其中24例慢性乙型肝炎和10例急性乙型肝炎;另外选取健康对照者10例,分离PBMC,利用HBV C基因型Envelope区肽段(特异性)或佛波酯联合伊屋诺霉素(非特异性)刺激,流式细胞术检测TLR2表达及Th17细胞百分比。进一步用TLR2的激动剂刺激PBMC,检测Th17细胞变化情况。组间比较采用Kruskal-Wallis H检验。结果在非特异性刺激条件下,Th17细胞在慢性乙型肝炎患者体内的百分比(4.08±1.78)%显著高于急性乙型肝炎患者(1.85±1.28)%及健康对照者(2.09±0.53)%(P=0.000 9、0.000 4),而TLR2+及IL-17A+TLR2+的表达在急、慢性乙型肝炎患者与健康人外周血中差异均无统计学意义(P均0.05)。在特异性刺激条件下Th17及TLR2的表达在慢性乙型肝炎患者体内的表达显著高于急性乙型肝炎组[(5.45±1.61)%vs(3.20±1.13)%;(5.19±3.18)%vs(1.88±1.30)%],差异具有统计学意义(P=0.000 6、0.000 6)。加入TLR2激动剂后急、慢性乙型肝炎患者体内Th17细胞的比例均显著升高,但在急性乙型肝炎患者中,刺激前后差异无统计学意义(P0.05)。结论 TLR2可以直接影响Th17细胞的应答,从而促进乙型肝炎中炎症应答反应。     

The Effect of Safranal on Th1/Th2 Cytokine Balance

Background: Several biological and medical benefits of Saffron, Crocus sativus (Iridaceae), have been demonstrated. However, mechanisms of actions for purified constituents are greatly unknown. Objective: To examine the effects of Safranal, a main constituent of Saffron stigma, on cell viability and cytokine profile of peripheral blood mononuclear cells (PBMC) were examined. Methods: Effects of Safranal at 0.1, 0.5 and 1 mM concentrations were evaluated on cell viability and production of interleukin 4 (IL-4), IL-10 and interferon-γ (IFN-γ) from non-stimulated and phytohemagglutinin (PHA) stimulated PBMCs, compared to 0.1 mM dexamethasone and saline. Results: In stimulated cells, different concentrations of Safranal caused significant decrease of lymphocytes viability (p<0.001 for all concentrations). All concentrations of Safranal inhibited IFN-γ and IL-10 secretion in stimulated cells (p<0.01). In addition, high concentration of Safranal significantly decreased cell viability of non-stimulated PBMCs (p<0.001). The effect of 1 mM Safranal on IL-4 secretion was less than dexamethasone (p<0.05). Safranal showed a stimulatory effect on IFN-γ secretion in non-stimulated cells. The IFN-γ/IL-4 ratio at the presence of two higher Safranal concentrations both in non-stimulated and stimulated cells were significantly higher than those of control and PHA stimulated groups, respectively (p<0.05). Conclusion: The IFN-γ/IL-4 ratio increases in the presence of Safranal which indicates an effect on Th1/Th2 balance. Therefore, Safranal may have therapeutic effects in inflammatory diseases associated with Th1/Th2 imbalance.     

慢性乙型肝炎患者应用拉米夫定前后T淋巴细胞亚群、CD4+CD25+调节性T淋巴细胞及白细胞介素-10、干扰素-γ的变化

目的 观察慢性乙型肝炎(CHB)患者应用拉米夫定抗病毒治疗前后外周血T淋巴细胞亚群、CD4+CD25+调节性T淋巴细胞(CD4+CD25+Treg)及IL-10、IFN-γ水平的变化.方法 选择CHB患者90例,在应用拉米夫定抗病毒治疗前及治疗后52周时,用流式细胞仪检测患者外周血T淋巴细胞亚群;在治疗前及治疗后12、24、36、52周时,用流式细胞仪检测外周血CD4+CD25+Treg频率,用双抗体夹心ELISA法检测IL-10、IFN-γ水平.组间及组内总体均数比较采用方差齐性的单因素方差分析或Dunnett's检验,组内治疗前后两时段均数比较采用配对t检验.结果 在90例CHB患者中,完全应答的32例患者的CD4+T淋巴细胞、CD8+T淋巴细胞及CD4+/CD8+较治疗前升高(t=4.055、3.267、2.328,均P＜0.05),外周血CD4+CD25+Treg频率在0、12、24、36、52周时分别为(5.40±0.60)%、(4.99±0.59)%、(4.54±0.72)%、(3.86±0.95)%、(3.44±0.76)%;IFN-γ水平、IFN-γ/IL-10逐步上升,IL-10水平逐步下降.部分应答的43例患者的CD4+T淋巴细胞及CD4+/CD8+较治疗前升高(t=3.484、2.018,均P＜0.05),CD8+T淋巴细胞较治疗前无明显差异,外周血CD4+CD25+Treg频率在0、12、24、36、52周时分别为(5.65±0.60)%、(5.23±0.63)%、(4.65±0.98)%、(4.42±0.97)%、(4.32±0.82)%,IFN-γ水平、IFN-γ/IL-10升高,IL-10水平降低.无应答的15例患者的外周血CD4+T淋巴细胞、CD8+T淋巴细胞及CD4+/CD8+、外周血CD4+CD25+Treg频率及IFN-y水平、IFN-γ/IL-10、IL-10水平较治疗前无明显变化.结论 应用拉米夫定治疗过程中,获得满意应答的CHB患者的外周血CD4+CD25+Treg频率下降,CD4+/CD8+、IFN-γ/IL-10的比例升高.

Abstract：

Objective To explore the correlation between the efficacy of lamivudine (LAM)therapy and changes of T lymphocyte subsets,CD4+ CD25+ regulatory T lymphocytes (Treg),and levels of interleukin-10 (IL-10)and interferon-gamma (IFN-γ)in the peripheral blood of patients with chronic hepatitis B (CHB).Methods Ninety CHB patients were enrolled in this study.T lymphocyte subsets in the peripheral blood were detected by flow cytometry at baseline and week 52 of LAM therapy.The frequencies of CD4+ CD25+ Treg in the peripheral blood were detected by flow cytometry and levels of IL-10 and IFN-γ were detected by enzyme-linked immunosorbent assay (ELISA)at baseline,week 12,24,36 and 52.The comparisons of overall means between groups and within groups were done by analysis of variance or Dunnett's test.The comparison of means before and after LAM therapy was done by paired t test.Results In 32 complete-responders of 90 CHB patients,the proportions of CD4+ T lymphocytes,CD8+ T lymphocytes and CD4+/CD8+ ratio were increased significantly after LAM therapy (t=4.055、3.267、2.328,all P＜0.05); the frequencies of CD4+CD25+ Treg at baseline,week 12,24,36 and 52 were (5.40±0.60)%,(4.99±0.59)%,(4.54± 0.72)%,(3.86±0.95)% and (3.44±0.76)%,respectively; the levels of IFN-γ,IFN-γ/IL-10 ratio were increased,while the IL-10 level was decreased after LAM therapy.In 43 partial-responders,the proportion of CD4+T lymphocytes and ratio of CD4+/CD8+ were increased after LAM therapy (t= 3.484,2.018,both P＜0.05); the proportion of CD8+ T lymphocytes was not changed significantly after therapy; the frequencies of CD4+ CD25+ Treg at baseline,week 12,24,36 and 52 were (5.65±0.60)%,(5.23±0.63)%,(4.65±0.98)%,(4.42±0.97)% and (4.32±0.82)%,respectively;IFN-γ level,IFN-γ/IL-10 ratio were increased,while IL-10 level was decreased.In 15 non-responders,the proportion of T lymphocyte subsets,the frequency of CD4+ CD25+ Treg,the levels of IFN-γ and IL-10 were not changed significantly after LAM treatment.Conclusions In CHB patients who have achieved response after LAM therapy,the frequency of CD4+ CD25+ Treg in the peripheral blood is decreased,while ratios of CD4+/CD8+ and IFN-γ/IL-10 in the peripheral blood are increased.     

HCV感染患者免疫细胞部分细胞因子分泌情况的初步研究

目的研究与正常人比较丙型肝炎病毒（HCV）感染患者免疫细胞分泌γ干扰素（IFN-γ）、白细胞介素10（IL-10）、肿瘤坏死因子α（TNF-α）及白细胞介素4（IL-4）的细胞频数情况,了解HCV感染对其影响。方法分离外周血单核细胞（PBMCs）,应用IL-10、IFN-γ、TNF-α及IL-4流式抗体进行细胞内因子染色,应用FACSCalibur流式细胞仪及FACSCalibur软件进行检测分析。结果HCV感染患者分泌IL-10、IFN-γ、IL-4的细胞频数在CD4＋CD8-T细胞、CD4-CD8＋T细胞、NK细胞和NKT细胞均发生明显下降;分泌TNF-α的细胞频数在CD4-CD8＋T淋巴细胞及NK细胞出现下降;HCV感染患者NK细胞、NKT细胞分泌IL-10和IFN-γ的细胞频数较CD4＋CD8-T淋巴细胞、CD4-CD8＋T淋巴细胞下降得更加明显。结论HCV感染患者的细胞免疫功能受到明显的损害,细胞因子分泌能力明显减低;固有免疫细胞功能受损可能是HCV感染慢性化的重要原因;细胞因子分泌的调节是抗HCV感染免疫治疗过程中需要调节的方向。     

羟氯喹抑制紫外线诱导的系统性红斑狼疮CD4+T细胞白细胞介素-10和干扰素-γ的表达

目的 研究紫外线对系统性红斑狼疮(SLE)CD4+T细胞因子的影响和羟氯喹的抑制作用.方法 选择SLE 30例,健康对照10名.磁珠分选SLE患者和健康人的CD4+T细胞,紫外线311 nm窄谱中波紫外线暴露,加入羟氯喹共培养,酶联免疫吸附试验(ELISA)检测培养上清白细胞介素(IL)-10和干扰素-γ的表达水平.采用t检验进行统计学分析.结果 SLE患者CD4+T细胞IL-10表达高于健康对照[(27±4)和(18±3) pg/ml,P=0.011];经45、100 mJ/cm2紫外线暴露后,SLE活动患者CD4+T细胞IL-10表达升高[(27±4)和(77±42) pg/ml,(40±18)和(77±42) pg/ml,P=0.022,P=0.048],经100 mJ/cm2紫外线暴露后,活动患者CD4+T细胞IL-10表达高于稳定患者[(77±42)和(24±4)pg/ml,P=0.029];羟氯喹降低SLE活动患者CD4+T细胞IL-10和干扰素-γ表达[(2.6±4.0)和(17.9±2.3)pg/ml,P=0.018,P=-0.017)];羟氯喹降低经45,100 mJ/cm2紫外线暴露后SLE活动患者T细胞IL-10表达[(40±18)和(22±6)pg/ml,(77±42)和(21±5) pg/ml,P=0.037,P=0.04];羟氯喹降低经100 mJ/cm2紫外线暴露的SLE活动和稳定患者T细胞干扰素-γ表达[(18±3)和(13±14) pg/ml,(19±7)和(12±5) pg/ml,P=0.013,P=0.049].结论 紫外线加重SLE患者体内Th1/Th2细胞因子的比例失衡;羟氯喹抑制了紫外线诱发SLE患者干扰素-γ和IL-10的表达.

Abstract：

Objective To explore the role of hydroxychloroquine (HCQ) in ultraviolet B (UVB)- induced expression of interleukin (IL)-10 and interferon (IFN)-γ from CD4+T cells in patients with systemic lupus erythematosus (SLE). Methods Thirty patients with SLE and 10 healthy controls were enrolled in the study. CD4+ T cells were isolated using magnetic beads from SLE patients and healthy controls. HCQ was added in culture media before and after irradiation with UVB 311 nm narrow band ultraviolet B (NB-UVB). The levels of IL-10 and IFN-γ in the supernatant were detected with enzyme-linked immunosorbent (ELISA). Comparisons between groups were performed by t-test. Results The level of IL-10 was higher in SLE patients [(27±4) pg/ml] than that in healthy controls [(18±3) pg/ml, P=0.011]. After exposure of CD4+T cells to UVB in 45 or 100 mJ/cm2 dosages, the level of IL-10 was increased significantly in patients with active disease (P=0.022, P=0.048). After exposure of CD4+T cells to UVB in 100 mJ/cm2 dosages, the levels of IL-10 was higher in patients with active disease [(77±42) pg/ml] than patients with stable disease [(24± 4) pg/ml, P=0.029]. When CD4+ T cell were cultured with HCQ, IL-10 and IFN-γ levels in patients with active disease [(2.6±4.0), (17.5±2.3) pg/ml] were decreased significantly (P=0.018, P=0.017). HCQ reversed UVB-induced IL-10 expression in active SLE patients after exposure of CD4+T cells to UVB in 45 or 100 mJ/cm2 dosages (P=0.037, P=0.04). HCQ also reversed UVB-induced IFN-7 expression in active SLE patients and stable SLE patients after exposure to CD4+T cells with UVB in 100 mJ/cm2 dosages (P=0.013, P= 0.049). Conclusion UVB can aggravate the imbalance of Th1 and Th2 cytokines. HCQ inhibits UVB-induced IL-10 and IFN-7 expression of CD4+T cells in patients with SLE, especially in patients with active disease.     

T Helper Cells Profile and CD4+CD25+Foxp3+Regulatory T Cells in Polycystic Ovary Syndrome

Background: Polycystic ovary syndrome (PCOS) is considered as the most common cause of female infertility that affects 4-10% of women in the reproductive age. Previous studies have shown the role of a balanced immune response in a successful pregnancy and fertility. Objective: To investigate the T helper cells type 1 (Th1) /Th2/Th17/Treg paradigms in peripheral blood of infertile PCOS compared with normal fertile women. Methods: Peripheral blood mononuclear cells (PBMCs) were isolated at the late follicular phase from 10 PCOS and 10 fertile women. PBMCs were stimulated with PMA and ionomycin in the presence of Berefeldin A as Golgi stop agent to detect intracellular cytokine production (IFN-γ, IL-17, and IL-4) from CD3+CD4+T cells population indicating T helper (Th) cells subsets by flowcytometry. Moreover, regulatory T cells were enumerated using CD25 and Foxp3 markers. Results: In this study, we report that the frequency of Th1 cells was increased compared to Th2 cells in infertile PCOS when considering Th1/Th2 ratio (P=0.05). Analysis of Th17/Th2 ratio showed a significant difference with a bias toward Th17 dominancy in PCOS (P=0.02). The proportion of CD4+CD25+Foxp3+ regulatory T cells was significantly lower in PCOS patients than that of healthy fertile women (P=0.02). Conclusion: In summary, Th1 and Th17 bias and reduction of Treg and Th2 cells as regulators of immune responses might be involved in the pathogenesis of PCOS. These results are suggestive of an altered immune response to inflammatory status in PCOS patients, likely causing some complications such as infertility in these patients.     

华支睾吸虫成虫抗原和排泄分泌产物对T细胞的作用研究

目的观察华支睾吸虫成虫抗原(Crude antigen,CA)、排泄/分泌产物(excretory-secretory products,ESPs)对T细胞的作用。方法体外分离小鼠骨髓细胞诱导分化为未成熟骨髓树突状细胞(immature DC,iDC);磁珠分选仪分选小鼠脾脏细胞的初始CD4+T细胞;流式细胞术检测DC、CD4+T细胞的纯度;抗原刺激DC细胞,实验分为PBS阴性对照组,LPS阳性对照组,CA和ESPs刺激组;负载抗原后的DC细胞与分选的CD4+T细胞共培养72h;Real time-PCR检测T-bet、GATA3mRNA的相对表达量;ELISA检测细胞培养上清中IFN-γ、IL-4细胞因子的表达量。结果与PBS组相比,ESPs刺激组Tbet、GATA3mRNA表达水平升高(P0.05),而CA刺激组T-bet、GATA3 mRNA表达水平差异不显著;与PBS组相比,ESPs刺激组细胞因子IFN-γ、IL-4的含量均升高(P0.05),CA刺激组仅IFN-γ的分泌增高(P0.05),IL-4无明显变化。结论 CA可能诱导宿主产生Th1型免疫应答,ESPs可能诱导宿主产生Th1型、Th2型免疫应答。