类风湿性关节炎患者外周血Th17/Treg细胞比率失衡的研究

目的:观察类风湿性关节炎(RA)患者外周血Th17细胞与Foxp3+CD4+CD25+调节性T(Treg)细胞的平衡状态与疾病状态的关系,初步阐明Th17/Treg细胞比率失衡在RA发病机制中的作用和意义。方法:流式细胞术(FCM)检测RA患者和健康人外周血中Th17细胞和Foxp3+CD4+CD25+Treg细胞的比率。结果:活动期RA患者外周血CD3+CD4+T细胞和Th17细胞的比率均明显高于健康对照组(P均0.05);而Foxp3+CD4+CD25+Treg细胞的比率明显低于健康对照组(P0.05)。随疾病活动性的增加,Th17细胞表达增高(P0.05);而Foxp3+CD4+CD25+Treg细胞表达降低,但无统计学意义(P0.05)。结论:RA患者外周血T细胞紊乱以CD4+T细胞的增加为主,Th17细胞比率的增加和Foxp3+CD4+CD25+Treg细胞比率的降低所致的Th17/Treg细胞比率失衡,可能在RA的发生发展中起重要作用。     

成人哮喘患者Treg/Th17细胞失衡与呼出气一氧化氮的相关性研究

目的:探讨成人哮喘患者Treg/Th17细胞失衡与呼出气一氧化氮(FeNO)的相关关系。方法:募集成人哮喘患者17例,慢性咳嗽非哮喘患者16例。所有患者均检测FeNO值,并用ELISA法检测血浆IL-17的表达水平,流式细胞术检测外周血中Treg、Th17细胞占CD4~+T淋巴细胞比例。比较两组患者FeNO水平的差异及其与Treg/Th17的相关关系。结果:与慢性咳嗽组相比,哮喘组血浆IL-17浓度升高(P<0.05)、外周血Th17/CD4~+T细胞比值升高(P<0.001)、FeNO水平升高(P<0.001)、Treg/Th17细胞的比值降低(P<0.001),而Treg/CD4~+细胞比值无明显变化(P>0.05)。哮喘组FeNO值与外周血Treg/CD4~+T细胞比值无明显相关性,而与Th17细胞占CD4~+T淋巴细胞比例呈正相关(r=0.663,P=0.01),与Treg/Th17细胞比值呈负相关(r=-0.757,P=0.002)。结论:哮喘患者FeNO水平升高与Treg/Th17失衡有关,主要与Th17细胞表达升高有关。     

Treg/Th17失衡在脓毒症发病机制中的作用

目的: 观察脓毒症患者外周血中CD4⁺CD2⁺CD127^-调节性T细胞(Treg)及辅助性T细胞17(Th17)的比例,并探讨Treg/Th17失衡在脓毒症发病中的作用。方法: 选择2010年1~8月入住我院ICU的脓毒症患者70例,按疾病严重程度分为脓毒症组(34例)、重症脓毒症组(21例)和脓毒症休克组(15例)。第1 d抽取外周血,应用流式细胞术检测不同组别患者外周血中Treg/Th17比例及CD14单核细胞 HLA-DR表达率,并探讨Treg/Th17比例与免疫状态及病情严重程度(APACHEⅡ评分)的关系。选取同期健康查体者为对照组(30例)。结果: (1) 和对照组相比,各病例组外周血Treg及Th17比例均明显升高(均P<0.01),但升高的程度不同。Th17表达以重症脓毒症组升高最明显,Treg表达以脓毒症休克组升高最明显。(2)Treg/Th17:脓毒症休克组>重症脓毒症组>脓毒症组,各组两两相比均有显著差异(均P<0.01)。脓毒症组Treg/Th17显著低于对照组(P<0.01),脓毒症休克组Treg/Th17显著高于对照组(P<0.01),但重症脓毒症组Treg/Th17与对照组比较无明显差异。(3)CD14单核细胞HLA-DR表达率:脓毒症休克组<重症脓毒症组<脓毒症组<对照组,两两比较均有显著差异(均P<0.01)。(4)Th17比例和APACHEⅡ评分及 HLA-DR表达率无相关性;Treg表达率和APACHEⅡ评分正相关(r=0.93, P<0.01),和HLA-DR表达率负相关(r=-0.89, P<0.01);HLA-DR表达率和APACHEⅡ评分负相关(r=-0.91, P<0.01)。结论: (1)脓毒症患者中Treg和Th17比例失调,Treg/Th17的失衡参与脓毒症的发病及进展。(1)Treg表达率可以在一定程度上反映机体病情及免疫状态。     

霉酚酸酯诱导治疗对狼疮性肾炎患者Treg/Th17的影响

目的 探讨霉酚酸酯(MMF)对狼疮性肾炎(LN)患者调节性细胞(Treg)/辅助性T细胞17 (Th17)的影响.方法 纳入2017年1月至2020年4月75例成年系统性红斑狼疮(SLE)患者作为研究对象,SLE活动度评分(SLEDAI) ＞4分,分为LN组(n=35)和SLE组(n=40).另外选取同期的30例健康志愿者作为对照组.LN组患者接受6个月MMF诱导治疗,分别采用流式细胞术和酶联免疫吸附测定法检测各组受试者以及LN患者基线、治疗3个月、6个月时外周血Th17、Treg百分比和血清白细胞介素(IL)-17、转化生长因子-beta(TGF-β)水平.结果 LN组患者Treg/Th17比值低于对照组和SLE组,同时血清IL-17水平高于对照组和SLE组(P＜0.05).与基线比较,LN患者治疗期间Treg/Th17比值逐渐上升,同时血清IL-17水平和SLEDAI评分逐渐降低(P＜0.05),与治疗3个月相比,治疗6个月时LN患者Treg/Th17比值进一步增加,同时血清IL-17水平和SLEDAI评分进一步降低(P＜0.05).经Spearman法分析,基线、3月、6月Treg/Th17与SLEDAI评分呈负相关(r=-0.724、-0.560、-0.336,P＜0.05).完成6个月随访后,12例LN患者达到了完全缓解(CR),14例部分缓解(PR),9例治疗无反应(NR).CR组和PR组患者Treg/Th17比值和血清TGF-β水平随着治疗的进行逐渐升高,同时血清IL-17水平逐渐降低,且CR组各指标变化趋势较PR组更明显(P＜0.05).结论 活动期LN患者外周血Th17亚群明显增加,且普遍存在Treg/Th17比例失衡情况.而经MMF诱导治疗后,外周血Th17亚群比例以及血清IL-17水平逐渐降低,有助于促进Treg/Th17恢复平衡.     

Th17 / Treg 比率在慢性乙型肝炎患者外周血的动态变化及意义

目的: 通过比较不同治疗方法对慢性乙型肝炎(Chronic hepatitis B ,CHB) 患者外周血Th17(T helper lymphocyte 17)、Treg(regular T cell)细胞频率及Th17/ Treg 比率的变化,探讨其在CHB 患者疾病转归中的意义。方法:CHB 患者40 例,根据保肝治疗基础上是否加用核苷酸抗病毒药物分为未抗病毒治疗组(Chronic hepatitis B without antiviral,CHBWA)20 例、抗病毒治疗组(Chronic hepatitis B antiviral,CHBA)20 例、乙肝病毒携带者(Asymptomatic hepatitis B carriers ,AsC)10 例、健康对照组(Health control,HC)10 例;采用流式细胞术检测CHBWA 组0 月、1 月及CHBA 组0 月、1 月、3 月,AsC 患者和HC外周血Th17、Treg 细胞频率,计算Th17/ Treg 比率,观察其在疾病不同阶段的动态变化。结果:CHBWA 组保肝治疗1 月后,Th17/ Treg 比率(0.39±0.11)比0 月(1.20±0.26)明显降低(P<0.01),已接近AsC 组(0.39±0.14)及HC 组(0.42±0.20)Th17/Treg 比率水平(P>0.05),且Th17/ Treg 比率与ALT 有良好的正相关关系(r =0.709,P =0.000);在CHBA 组,Th17/ Treg 比率在1 月(0.73依0.32)、3 月(0.76±0.44)均较0 月(1.18±0.27)明显下降,与0 月比较差异有统计学意义(P<0.01),但继续治疗到3 月时Th17/ Treg 比率较1 月时变化不明显,Th17/ Treg 比率在0、1、3 月均高于AsC 组及HC 组(P<0.01,0.05);Th17/ Treg 比率与ALT、HBV DNA 有良好的正相关关系(r =0.500,P =0.000;r =0.345,P =0.007);两组间比较,0 月时两组间Th17/ Treg 比率差异无统计学意义(P>0.05),但经治疗1 月后CHBA 组Th17/ Treg 比率高于CHBWA (t=4.471,P<0.01)。结论:CHB 患者中,抗病毒治疗将迅速影响Th17、Treg 细胞频率,导致Th17/ Treg 比率的变化,其变化可能与清除病毒有关。     

急性冠脉综合征患者Th17和Treg细胞的检测及意义

目的:探讨急性冠脉综合征患者Th17细胞和Treg细胞的变化及意义。方法:选取51例急性冠脉综合征患者,25例稳定性心绞痛(SA)患者,27例同期住院的健康对照者,分别采用流式细胞术、实时定量PCR和ELISA法检测外周血Th17细胞和Treg细胞百分率、关键核转录因子RORγt、STAT3和Foxp3 mRNA的表达以及血浆IL-17A和TGF-β1的浓度。结果:①ACS患者外周血中Th17细胞百分率、RORγt和STAT3 mRNA显著高于SA患者和对照组(P<0.01);②与SA组和对照组相比,ACS患者CD4+CD25+Foxp3+Treg和CD4+Foxp3+Treg细胞百分率,Foxp3 mRNA的表达以及血浆TGF-β1的浓度显著降低(P<0.01)。结论:ACS患者外周血中Th17/Treg失衡,Th17/Treg失衡可能与斑块的不稳定密切相关。     

子痫前期患者外周血树突状细胞与T细胞亚群的变化

目的 观察子痫前期患者外周血中的树突状细胞亚群与T细胞亚群相关细胞因子的变化.方法 实验组为子痫前期患者32例,对照组为未孕妇女20例,正常妊娠妇女20例.采集研究对象外周血细胞,流式细胞术检测全血细胞中髓系树突状细胞(mDC)和浆细胞样树突状细胞(pDC);分离外周血单个核细胞,经胞内细胞染色检测Th1、Th2、Th17细胞数量及Th1/Th2比值.结果 子痫前期组mDC百分比(0.33±0.12)％和mDC/pDC比值(2.96±1.65)均高于正常妊娠组,二组数据有明显差异(P＜0.05);pDC百分比(0.16±0.13)％较正常妊娠组(0.21 ±0.12)％有所下降,二组差异有统计学意义(P＜0.05).子痫前期组IFN-γ、IL-4和IL-17的百分比分别为(18.67 ±1.96)％、(1.88±0.51)％和(1.36±0.59)％,与正常妊娠组相比均有显著性差异(P＜0.01).子痫前期组mDC/pDC比率和Th1/Th2之间呈显著正相关(r=0.637,P＜0.01);Th17表达率与pDC表达率之间呈负相关(r=-0.670,P＜0.05),与mDC/pDC比率之间呈显著正相关(r=0.772,P＜0.01).结论 子痫前期患者外周血中树突状细胞亚群和Th1、Th2、Th17型细胞因子异常表达,可能是患者发生免疫失衡的重要原因.     

慢性牙周炎患者牙龈卟啉单胞菌与Th17/Treg的相关性研究北大核心CSCD

目的:探究慢性牙周炎(CP)患者口腔中牙龈卟啉单胞菌(Pg)的定植水平与外周血Th17/Treg动态平衡的关系。方法:收集2020年3月至2020年10月于新疆维吾尔自治区人民医院口腔科就诊的CP患者45例,其中中重度18例、轻度27例,以及健康志愿者27例。收集各组外周血标本,流式细胞术检测患者外周血中Th17细胞及Treg百分比。采集各组患者牙龈内菌斑标本,提取DNA,RT-qPCR检测Pg定植量。结果:3组Th17细胞水平分别为(0.94±0.48)%、(1.47±0.84)%和(0.54±0.34)%,Treg水平为(10.60±3.63)%、(8.20±2.43)%和(8.70±1.84)%。中重度组Th17/Treg显著高于轻度组和对照组(P<0.05)。Pg菌量值与Th17细胞百分比、Th17/Treg呈正相关(r=0.370、0.384,P<0.05);探诊深度(PD)与Pg菌量值、Th17细胞百分比、Th17/Treg呈显著正相关(r=0.622、0.468、0.405,P<0.001)。结论:Th17/Treg失衡可能影响CP发生发展,致病菌Pg的局部定植程度与外周血Th17细胞百分比相关。     

不同类型HBV感染者外周血Treg/Th17细胞的变化及意义

目的:探讨不同类型HBV感染者外周血中CD4+ Foxp3+ Treg/Th17细胞的变化及意义.方法:选取15例急性乙型肝炎(Acute Hepatitis B,AHB)患者、40例慢性乙型肝炎(Chronic hepatitis B,CHB)患者、40例无症状携带者(Asymptomatic HBV carriers,AsC)及30例健康对照者,分别采用流式细胞术、RT-PCR和ELISA检测外周血CD4+ Foxp3+ Treg/Th17细胞百分率、核转录因子foxhead winged-helix box protein 3 (Foxp3)/retinoid-related orphan receptor gamma-t (RORγt) mRNA的表达以及血浆转化生长因子-β1(Transforming growth factor-31,TGF-β1)/IL-17的水平.结果:AHB组患者CD4+ Foxp3+ Treg/CD4+T细胞百分率、Foxp3 mRNA及TGF-β1水平与正常对照组相比无明显差异(P＞0.05);而CD4+ IL-17 +/CD4+T细胞百分率、RORγtmRNA及IL-17水平与正常对照组相比明显升高,差异有统计学意义(P＜0.05).CHB组患者CD4+ Foxp3+ Treg/CD4+T细胞百分率、Foxp3 mRNA、TGF-31水平及CD4+ IL-17 +/CD4+T细胞百分率、RORγt mRNA、IL-17水平与正常对照组相比均明显升高,差异有统计学意义(P＜0.05);与正常对照组相比,AsC组患者CD4+ Foxp3+ Treg/CD4+T细胞百分率、Foxp3 mR-NA、TGF-β1水平及CD4+ IL-17 +/CD4+T细胞百分率、RORγt mRNA、IL-17水平无明显差异(P＞0.05).结论:在不同类型HBV感染者外周血中Treg/Th17细胞失衡,Treg/Th17细胞可能与HBV感染的状态有关.     

老年类风湿关节炎患者外周血Th17和Treg变化及其与共患冠心病关系的探讨

为分析老年类风湿关节炎（rheumatoid arthritis, RA）患者Th17和Treg变化与共患冠心病（coronary artery disease, CAD）的相关性,回顾性选取122例老年RA患者,其中未共患CAD者纳入无共患组（84例）,共患CAD者纳入共患组（38例）,使用FACS检测患者外周血Th17和Treg（CD25⁺、Foxp3⁺）水平,并计算Th17/Treg比值,分析其与共患CAD的相关性。结果显示,共患组患者外周血Th17水平高于无共患组（P=0.000）,Treg水平低于无共患组（P=0.001）,Th17/Treg比值高于无共患组（P=0.000）;外周血Th17、Th17/Treg比值与心血管共患症发生呈正相关（r=0.814,P=0.003;r=0.623,P=0.000）,而Treg与心血管共患症发生呈负相关（r=-0.824,P=0.002）。该研究提示,老年RA共患CAD患者存在明显的Th17、Treg亚群失衡及其免疫应答失衡,Th17、Treg可能与老年RA患者共患CAD有关。     

Impaired balance of Th17/Treg in patients with nasal polyposis

Nasal polyposis (NP) is a chronic inflammatory disease of the nasal cavity and sinuses that is regulated by T lymphocyte subsets. Imbalance of Th17/Treg has been considered critical in the development of inflammation and atopic reactions. To assess whether the balance of Th17/Treg is disrupted in patients with NP, we evaluated the distribution of Th17 and Treg cells among peripheral blood mononuclear cells (PBMCs) in atopic patients with NP, non-atopic patients with NP and controls. We then determined mRNA levels of RORc and Foxp3 and protein levels of IL-17, TGF-β and IL-10 in polyp tissue among the three groups. Finally, we investigated the correlation between Th17-, Treg- and Th1-, Th2-related cytokines (INF-γ, IL-4, IL-5). The results demonstrated that both atopic and non-atopic patients with NP revealed significantly increased Th17 proportion and decreased Treg proportion in PBMCs, as well as significantly increased RORc and IL-17 levels and decreased Foxp3 and TGF-β levels in polyp tissue. Furthermore, these differences were significant between atopic and non-atopic groups. The frequency of Treg in PBMCs was found to be negatively correlated with Th1 and Th2 cytokines in polyps. These results indicated that an impaired balance of Th17/Treg existed in patients with NP and was more severe in atopic patients, suggesting that the imbalance of Treg/Th17 may play an important role in the development of NP and that atopy may aggravate NP by promoting the imbalance of Th17/Treg.     

Decreased Expression of FOXP3 in Nasal Polyposis

Purpose

The pathogenesis of nasal polyposis (NP) is unclear. Eosinophils and mast cells are considered to play important roles in this process. In addition, the levels of Th2-type cells are increased, irrespective of the atopic status of the patient with NP. In this context, we and others have shown high levels of thymus and activation-related chemokine/CCL17, macrophage-derived chemokine, eotaxin, and RANTES in patients with NP. Forkhead box P3 (FOXP3) plays a key role in CD4+CD25+ regulatory T-cell function and represents a specific marker for regulatory T cells (Tregs). Decreased expression of FOXP3 has been reported in allergic diseases. The present study was designed to evaluate the presence and potential roles of Tregs, defined by the expression of FOXP3 protein, in NP.

Methods

Using immunohistochemistry, we estimated the numbers of FOXP3+ cells in the epithelium and lamina propria of the NPs of 17 patients with chronic rhinosinusitis with NP and the nasal mucosa of 15 patients with allergic rhinitis (AR). The number of FOXP3+ cells in NPs was compared with that in the nasal mucosa of patients with AR, and the numbers of FOXP3+ cells in atopic and non-atopic NP were also compared.

Results

The number of FOXP3+ cells in the lamina propria of patients with NP was significantly lower than that in the nasal mucosa of the AR patients (2.79 vs. 5.99, P=0.008). There was no statistically significant difference noted for the numbers of FOXP3+ cells between the epithelium of the NP and the nasal mucosa (3.60 vs. 2.39, P=0.180). Furthermore, the numbers of CD4+FOXP3+ cells were lower in NPs than in the allergic nasal mucosa. There was no difference in the number of FOXP3+ cells between the atopic and non-atopic NP patients.

Conclusions

Fewer Tregs (i.e., decreased FOXP3 expression) are found in NPs than in the nasal mucosa of AR patients. As the severity of eosinophilic, Th2-type inflammation and the levels of inflammatory mediators are much higher in NPs than in the nasal mucosa of AR patients, an inverse co-relationship may exist between these parameters and the number of Tregs. The deficiency of Tregs in NP may account for the more pronounced Th2-type inflammation seen in these patients.     

Transforming growth factor-β1 promotes Treg commitment in nasal polyposis after intranasal steroid treatment

Background

A predominant Th17 population and impaired Treg function is the marker of nasal polyposis (NP) in Chinese patients. TGF-β1, a multifunction cytokine, is a vital factor involved in inducing or restricting specific Th cell development. However, its role in NP has still not been well understood.

Methods

In a double-blind trial, 30 subjects were randomized into 2 groups (15 steroid-treated NP, 15 untreated NP), and 15 normal subjects were allocated as control group. We analyzed the expression of TGF-β1, p-Smad2, p-STAT3, Smad7, SOCS3, IL-10, IL-17A, Foxp3, and RORc in the NP tissue of Chinese patients using mRNA and protein detection methods.

Results

TGF-β1, p-Smad2, IL-10, SOCS3, and Foxp3 expression was higher in steroid-treated NP patients than in untreated NP patients. Conversely, expression of p-STAT3, Smad7, IL-17A, and RORc was higher in untreated NP patients than in steroid-treated NP patients, demonstrating that TGF-β1 was more likely to contribute to Treg commitment in Chinese NP patients after intranasal steroid treatment.

Conclusions

TGF-β1 may be a signature Treg cytokine, which is valuable for obtaining a clear understanding of the pathogenesis of NP. Moreover, intranasal steroid treatment attenuated the chronic inflammatory response in these patients by promoting Smad-dependent Treg functions and reducing STAT3-mediated Th17 reactions.     

CVB3诱导的病毒性心肌炎小鼠模型中CD4~+T细胞亚群格局及其作用

本研究主要关注BALB/c小鼠感染柯萨奇病毒B3型(CVB3)后CD4+T细胞亚群格局的变化及其对病毒性心肌炎发病的贡献度。CVB3腹腔感染小鼠后第7d,通过小鼠体重下降率、心肌损伤血清学指标肌酸激酶(CK)活性以及心肌组织病理学改变等多项指标证实小鼠心肌炎模型的成功建立。经Real-time PCR检测感染第7d脾脏CD4+T细胞亚群主要细胞因子IFN-γ、IL-4、IL-17A、IL-17F及转录因子Foxp3表达情况;以流式细胞术检测了CD4+T细胞各亚群比例,并通过多元线性回归分析法评估了各T细胞亚群对病毒性心肌炎发病的影响。结果显示,与对照组相比,CVB3感染小鼠脾脏IL-17A、IL-17F、IFN-γ表达均显著上升(分别约为12、8.5、5倍),而IL-4和Foxp3表达无明显变化。CVB3感染小鼠脾脏中CD4+IL-17+Th17细胞的上调幅度最为明显,约2.75倍,其次为IFN-γ+Th1细胞,上调约2.27倍,而Th2和Treg细胞无明显变化。进一步统计学分析显示,Th17对病毒性心肌炎发病的贡献度最高(1.808),Th1次之,贡献度为1.581,而Th2和Treg对病毒性心肌炎发病无显著影响,提示CD4+T细胞亚群格局变化与病毒性心肌炎发病密切相关,其中以Th17对心肌炎发病的贡献度尤为显著。     

Th17/Treg及其相关细胞因子在结肠癌中的表达并与肿瘤分期的相关性

研究结肠癌患者肿瘤组织中Th17细胞、Treg细胞及患者外周血中相关细胞因子的表达水平,探讨其表达与肿瘤分期的相关性及可能机制。运用流式细胞分析(FACS)技术检测30例结肠癌肿瘤组织及癌旁正常组织中Th17细胞及Treg细胞的比例;采用逆转录聚合酶链反应技术(RT-PCR)检测20例结肠癌患者外周血中Th17、Treg相关细胞因子IL-23和IL-10的表达水平。结果显示结肠癌肿瘤组织中Th17细胞和Treg细胞的比例明显高于癌旁正常组织(P<0.05),进展期肿瘤组织中Treg细胞的比例高于早期(P<0.05),而Th17细胞的比例较早期无明显差异(P>0.05),进展期肿瘤组织中Th17/Treg细胞的比例比早期偏低(P<0.05)。结肠癌患者外周血中IL-23、IL-10的mRNA水平升高,与健康对照组差异明显(P<0.05),且进展期与早期结肠癌IL-10mRNA的表达水平差异显著(P<0.05),而IL-23mRNA在两组间无明显差异(P>0.05)。随着结肠癌病程的进展,肿瘤组织内Th17细胞及Treg细胞的比例逐渐升高,且Treg细胞比Th17细胞升高更加明显。相关细胞因子IL-23和IL-10在患者外周血中的变化趋势和Th17、Treg细胞在肿瘤组织中的变化趋势相一致,提示Th17、Treg细胞在结肠癌的表达可能与肿瘤免疫微环境中相关的细胞因子调节有关。     

美沙拉嗪对DSS诱导小鼠溃疡性结肠炎模型Th1、Th17及Treg细胞亚群的影响

 目的:观察葡聚糖硫酸钠（DSS）诱导小鼠溃疡性结肠炎（UC）模型中辅助性T细胞（Th1、Th17亚群）及调节性T细胞（Treg）细胞亚群的变化,探讨美沙拉嗪（MSLZ）治疗UC的免疫学机制。方法: 采用流式细胞分析术检测DSS诱导的小鼠UC模型结肠组织及外周血单个核细胞中白细胞介素17（IL-17）、γ-干扰素（IFN-γ）及核转录因子Foxp3的表达,并检测MSLZ预治疗对小鼠UC 模型Th1、Th17和Treg亚群的影响。结果: 在DSS诱导的小鼠UC模型中,其外周血单个核细胞（PBMC）中CD3+T细胞高表达IL-17、IFN-γ及Foxp3,肠黏膜单个核细胞（LPMC）中CD3+T细胞高表达IFN-γ和Foxp3,但IL-17的表达与对照组无差异。进一步发现UC模型小鼠LPMC中Th17、Th1和Treg均显著高于对照组,但PBMC中只有Treg高于对照组。MSLZ预治疗能显著下调UC 模型小鼠PBMC和LPMC中Th17、Th1和Treg细胞亚群。结论: DSS诱导的小鼠 UC模型中CD4+T细胞亚群Th1、Th17及Treg细胞显著升高,提示CD4+T细胞亚群在UC发病中起重要作用,美沙拉嗪可能通过调节Th1、Th17及Treg细胞亚群发挥抗炎及治疗UC作用。     

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。     

Organization of secondary lymphoid tissue and local IgE formation to Staphylococcus aureus enterotoxins in nasal polyp tissue

BACKGROUND: Bilateral nasal polyposis (NP) is characterized by high concentrations of IgE in NP tissue, which show no relation to the atopic status. We aimed to study the relationship between systemic and local IgE formation, nasal carriage of Staphylococcus aureus and nasal polyposis. METHODS: In serum and nasal tissue homogenates from 24 NP patients and 12 controls, we determined concentrations of total IgE and IgE antibodies to inhalant allergens and S. aureus enterotoxins (SAEs; A,B,C,D,E,TSST) by ImmunoCAP. Tissue cryosections were stained for CD3, CD20, CD38, CD23, FcepsilonRI, IgE and SEA/SEB. RESULTS: We demonstrated a higher incidence of S. aureus colonization (17/24) and IgE antibodies to SAEs in NP tissue (12/24) compared with controls (3/12 and 0/12, respectively). Total IgE and IgE antibodies in serum and NP tissue were dissociated because of local polyclonal IgE formation in NP tissue. Staining of NP tissue revealed follicular structures characterized by B and T cells, and lymphoid accumulations with diffuse plasma cell infiltration. CONCLUSIONS: We demonstrated the organization of secondary lymphoid tissue in polyp tissue and a polyclonal hyper-immunoglobulinemia E associated with the presence of IgE antibodies to SAEs, colonization with S. aureus, and tissue eosinophilia in a relevant subgroup of polyp patients.