原发性肝癌患者体内调节性T细胞的生成和数量增加与疾病进展相关分析

目的:观察原发性肝癌(HCC)患者外周血和肝脏CD4+ CD25+ FoxP3+ 调节性T细胞(Treg)的频率、表型和分布特点.方法:应用流式细胞术分析30例原发性肝癌患者、30例健康人的外周血或HCC组织中肿瘤浸润淋巴细胞(TIL)和非肿瘤浸润淋巴细胞(NIL),Treg细胞的特点,并分析其临床意义.结果:结果表明...     

Treg细胞在食管鳞癌患者体内的分布及临床意义

目的:研究食管鳞癌患者外周血、肿爝旁组织和肿瘤组织内Treg细胞的分布情况及其在肿瘤免疫中的作用.方法:分离食管鳞癌患者外周血、肿瘤旁组织及肿瘤组织内浸润淋巴细胞,采用流式细胞术分析Treg细胞占CD4+T细胞的比例.结果:食管鳞癌患者肿瘤组织内Treg细胞占CD4+T细胞的比例明显高于肿瘤旁组织及外周血,且与临床分期相关.结论:食管鳞癌的免疫微环境存在免疫抑制.     

宫颈癌患者外周血中CD4+CD25+Foxp3+调节性T淋巴细胞及血清中IL-10、TGF-β的表达及其临床意义

目的 探讨宫颈癌患者外周血CD4+ CD25+ Foxp3+调节性T淋巴细胞(regulatory T cells,Treg)、T淋巴细胞亚群以及血清IL-10、TGF-β1、TGF-β2细胞因子的表达及其临床意义.方法 选取32例宫颈癌患者和24位健康体检者为研究对象,采用流式细胞术检测受试者外周血中CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比例、T淋巴细胞亚群细胞比例;采用ELISA方法检测血清中细胞因子IL-10、TGF-β1、TGF-β2的含量.结果 与健康对照组相比,宫颈癌组外周血中CD4+CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比值明显增高,差异有统计学意义(P＜0.01),T淋巴细胞亚群(CD3+、CD4+、CD8+、CD4 +/CD8+、CD19+)比例差异无统计学意义(P＞0.05),血清IL-10含量明显增高,TGF-β2含量明显降低,差异有统计学意义(P＜0.01),TGF-β1的含量差异无统计学意义(P＞0.05);宫颈癌组手术后、化疗后CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比例,血清IL-10、TGF-β1、TGF-β2含量均明显降低,差异有统计学意义(P＜0.01),CD4+ CD25+ Foxp3+Treg与TGF-β1之间存在正相关(r=0.673,P＜0.01).结论宫颈癌患者CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比值增高,且与TGF-B1含量呈正相关,可能在宫颈癌的肿瘤发生发展及肿瘤免疫逃逸中起着重要作用.     

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。     

甲状腺与外周血T淋巴细胞亚群比例差异

目的观察正常甲状腺与外周血T淋巴细胞亚群,包括调节性T细胞(regulatory T cells,Treg)、辅助性T细胞1(T helper 1 cells,Th1 cells)和辅助性T细胞2(T helper 2 cells,Th2 cells)的分布,Treg细胞中干扰素-γ(interferon-γ,IFN-γ)、白介素-4(interleukin-4,IL-4)及其mRNA的表达。方法 20名良性甲状腺肿物患者、3名胸腺手术及3名脾脏切除术患者,术前当天留取外周空腹静脉血,术中分别留取甲状腺、胸腺及脾脏标本,分离单个核细胞,流式细胞术检测标本组织及外周血T淋巴细胞亚群差异。磁珠分离法分离甲状腺及外周血CD25+T细胞,RT-PCR检测Treg中IFN-γ和IL-4 mRNA的表达。NKT细胞受体激动剂α-Galcer刺激Treg 7 d后,RT-PCR检测Treg中IFN-γ、IL-4、CD1d、Vα24及Vβ11 mRNA的表达。结果 1)甲状腺组织Th1、Th2细胞比例低于外周血(P0.001),而Th0、Treg细胞比例高于外周血(P0.001)。2)在甲状腺内,几乎所有的CD4+CD25+Foxp3+细胞可以同时分泌IL-4、IFN-γ,RT-PCR提示其IL-4、IFN-γmRNA表达明显高于外周血,而在外周血中,CD4+CD25+Foxp3+细胞并不表达IL-4或IFN-γ。3)在胸腺和脾脏中,未检测到同时表达IL-4、IFN-γ的CD4+CD25+Foxp3+细胞。4)甲状腺内Treg在α-GalCer刺激前后均不表达NKT细胞的表面标志CD1d、Vα24及Vβ11 m RNA,而IL-4和IFN-γmRNA的表达在刺激前后无明显差异。结论正常甲状腺与外周血T淋巴细胞亚群分布存在差异,甲状腺内Treg特异性的同时表达IL-4及IFN-γ。     

NF-κB寡核苷酸对CIA大鼠Th17/Treg平衡及细胞因子表达影响的研究

为探讨NF-κB寡核苷酸(oligodeoxynucleotide,ODN)对CIA大鼠Th17/Treg平衡及细胞因子表达的影响,建立Ⅱ型胶原诱导大鼠关节炎模型,将NF-κB ODN注射到大鼠右后踝关节腔内,并设对照组、模型组和实验组。42d后用流式细胞仪检测各组大鼠脾脏Th17、Treg百分率、凋亡率;qRT-PCR检测IL-17、TGF-β和IL-6mRNA表达;用ELISA检测血清和关节液IL-17、TGF-β、IL-6含量。结果显示实验组大鼠脾脏Th17占CD4~+T细胞比例及IL-17和IL-6mRNA表达、血清和关节液中IL-17和IL-6的水平均低于模型组,差别有统计学意义(P0.05);实验组大鼠脾脏Th17凋亡百分率低于模型组,差别有统计学意义(P0.05);实验组大鼠脾脏Treg占CD4~+T细胞比例及TGF-βmRNA表达、血清和关节液中TGF-β的水平均高于模型组,差别有统计学意义(P0.05);实验组大鼠脾脏Treg凋亡百分率与模型组相比明显降低,差别有统计学意义(P0.05)。由此可知,NF-κB ODN调节CD4~+T细胞Th17、Treg之间细胞平衡及相关细胞因子的分泌,对CIA有较好的治疗作用。     

Decorin提升小鼠脾脏细胞对乳腺癌细胞系4T1的免疫响应性

目的评价高表达核心蛋白聚糖(Decorin)的小鼠乳腺癌细胞系4T1对正常小鼠脾细胞的免疫激活效应,明确Decorin对抗肿瘤免疫的调节作用。方法采用携带Decorin基因的复制缺陷型重组腺病毒Ad.DCN感染小鼠乳腺癌细胞系4T1。与小鼠脾细胞共培养3d后,通过流式细胞术检测小鼠脾细胞的CD4~+T细胞、CD8~+T细胞、T记忆细胞(Tm)和T调节细胞(Treg)的百分比;利用实时定量PCR(qPCR)技术检测Th1类细胞因子IL-2、IL-12、TNF-α和IFN-γ的表达,Th2类细胞因子IL-4、IL-6、IL-10和转化生长因子β(TGF-β)的表达,以及与杀伤相关基因穿孔素与颗粒酶B的表达。结果与小鼠乳腺癌细胞系4T1共培养后,小鼠脾细胞CD4~+T淋巴细胞、CD8~+T淋巴细胞、Treg细胞比例无明显改变,但Tm细胞比例显著升高;同时,细胞因子、穿孔素和颗粒酶B表达下调。但是,病毒感染的4T1细胞,特别是Ad.DCN感染的4T1细胞可显著抑制Treg细胞,并部分逆转细胞因子表达的下调。结论 Decorin高表达可增强正常小鼠脾脏细胞对乳腺癌细胞系4T1的免疫响应性,从而激活抗肿瘤免疫反应。     

强直性脊柱炎患者外周血CD4+调节性T细胞的变化及意义

目的 探讨强直性脊柱炎(ankylosing spondylitis,AS)患者外周血中CD4+调节性T细胞(regulatory T cells,Treg)的表达、功能及意义.方法 采用流式细胞术检测78例AS患者和50例健康志愿者外周血中CD4+CD25+CD127lo/- Treg、细胞毒性T细胞(cytotoxic T lymphocytes,CTL)和NK细胞,采用ELISA法检测血清中β型转化生长因子(transforming growth factor-β,TGF-β)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的表达水平.从患者外周血单个核细胞中磁珠分选出CD4+CD25+ Treg细胞,混合淋巴细胞培养(mixed lymphocyte culture, MLC)分析其免疫抑制功能.结果 AS活动期患者外周血中CD4+CD25+CD127lo/-Treg占CD4+ T淋巴细胞的百分比为(4.36±1.21)%,MLC中CD4+CD25+ Treg抑制同种异体T淋巴细胞增殖功能低下,与其Treg分泌TGF-β减少相关,CD4+ Treg含量及功能均低于健康志愿者(P<0.05).AS患者外周血中CD4+CD25+CD127lo/- Treg水平与TGF-β呈正相关,与TNF-α呈负相关.结论 AS患者外周血中Treg表达水平低,且存在功能缺陷,导致体内诱导免疫耐受机能不足,可能参与AS免疫发病.     

支气管哮喘患者外周血Th17、CD4~+CD25~+Treg细胞表达特征

目的:探讨外周血Th17和CD4+CD25+调节性T细胞(Treg)在支气管哮喘患者中的表达特征。方法:41例慢性持续期哮喘患者,分为间歇-轻度组(n=23)和中重度组(n=18),行肺功能检查和哮喘控制问卷(ACQ)调查,20例正常人作为对照。通过流式细胞术检测外周血Th17和CD4+CD25+Treg细胞的比例。ELISA检测血浆以及植物血凝素刺激24小时后外周血单个核细胞(PBMC)上清液中的IL-17、IL-10、TGF-β水平。结果:中重度哮喘组外周血Th17细胞比例及血浆IL-17水平高于间歇-轻度哮喘和正常人组,而外周血CD4+CD25+Foxp3+Treg细胞比例及血浆IL-10、TGF-β水平则降低。中重度哮喘组PBMC上清液中IL-17水平增高。哮喘患者FEV1(%预计值)与Th17细胞及血浆IL-17表达成负相关,与CD4+CD25+Treg表达成正相关。ACQ平均得分与Th17细胞和血浆IL-17表达成正相关,与外周血CD4+CD25+Treg表达成负相关。结论:中重度哮喘中外周血Th17细胞应答增强,而CD4+CD25+Treg细胞缺乏,哮喘的严重程度及症状控制与外周血Th17/Treg免疫应答失衡密切相关。     

CD4~+ CD25~+调节性T细胞及Foxp3基因在不同淋巴结转移状态的非小细胞肺癌患者中的表达差异

目的:比较CD4+CD25+调节性T细胞及Foxp3基因在不同淋巴结转移状态的非小细胞肺癌患者外周血及肿瘤微环境中的表达差异。方法:46例初诊、初治的非小细胞肺癌患者根据有无淋巴结转移分为两组,采用流式细胞仪检测两组患者外周血中CD4+CD25+调节性T细胞的比例,Real-time PCR检测Foxp3基因的表达,免疫组化法检测肿瘤微环境中Foxp3的表达情况,ELISA法检测外周血及肿瘤组织匀浆中的TGF-β和IFN-γ水平。结果:Foxp3基因在转移淋巴结中的表达明显强于无转移的淋巴结,有淋巴结转移的非小细胞肺癌患者肿瘤微环境中的Foxp3表达明显强于无淋巴结转移的非小细胞肺癌患者,前者肿瘤组织匀浆中的TGF-β水平也明显高于后者,差异均具有显著性。两组患者外周血中CD4+CD25+调节性T细胞比例、Foxp3基因的表达及TGF-β、IFN-γ水平比较无显著性差异。结论:有淋巴结转移的非小细胞肺癌患者肿瘤微环境中存在Foxp3基因表达增强及TGF-β水平增高的现象,提示该类患者存在较为严重的局部肿瘤免疫抑制状态。     

NY-ESO-1和MAGE-A3抗原肽诱导肝癌患者的免疫应答研究

目的利用合成的HLA-A02限制性NY—ESO-1 p157—165或MAGE—A3p271—279抗原肽，体外通过抗原递呈细胞诱导HCC患者外周血T淋巴细胞，从而成功诱导出特异性CD8^＋T淋巴细胞免疫应答。方法通过SSP方法筛选20例HLA—A＊02的HCC患者的HLA亚型；通过逆转录多聚酶链反应和测序分析NY—ESO-1和MAGE—A3在肝癌组织中的表达以及多肽表位密集区的核苷酸变异状况；体外用细胞因子培养HCC患者外周血来源的树突状细胞（DC）；人工合成HLA—A＊02限制性NY—ESO-1p157—165或MAGE—A3 p271—279多肽，直接或用去除CD8^＋T淋巴细胞的PBMC或DC递呈，体外同T淋巴细胞孵育16d后，利用Elispot、细胞内细胞因子染色和四聚体实验检测T细胞免疫应答。结果20例HLA—A＊02患者中，NY-ESO-1mRNA阳性患者为11例，MAGE—A3mRNA阳性患者12例。中国HCC患者表达的NY—ESO-1和MAGE—A3序列高度保守。经多肽直接或用去除CD8^＋T淋巴细胞的PBMC或DC递呈，体外活化外周血T淋巴细胞，4例（36．4％）NY—ESO-1阳性HCC患者以及4例（33．3％）MAGE．A3患者产生针对多肽特异性的CD8’T细胞免疫应答。不同HLA—A＊02亚型HCC患者可产生针对NY—ESO-1p157—165或MAGE—A3p271—279抗原肽的免疫应答。结论NY—ESO-1p157-165或MAGE—A3p271—279抗原肽可以诱导出针对抗原肽的特异性CD8^＋T淋巴细胞免疫应答。提示HLA—A＊02限制性的NY-ESO-1 p157-165或MAGE—A3p271—279抗原肽可以作为有潜力的肝癌免疫治疗疫苗。     

Immune regulation by CD4+CD25+ T cells and interleukin-10 in birch pollen-allergic patients and non-allergic controls

BACKGROUND: CD4+CD25+ regulatory T (Treg) cells and the cytokines IL-10 or TGF-beta play key roles in the maintenance of T cell homeostasis and tolerance to infectious and non-infectious antigens such as allergens. OBJECTIVE: To investigate the regulation of immune responses to birch pollen allergen compared with influenza antigen by Treg cells obtained from birch pollen-allergic patients and non-allergic controls. METHODS: Peripheral blood was collected from 10 birch pollen-allergic patients and 10 non-allergic healthy controls. CD4+CD25+ and CD4+CD25- cells isolated by magnetic-activated cell sorting were co-cultured and stimulated with birch pollen extract or influenza vaccine in the absence or presence of anti-IL-10 or soluble TGF-betaRII. RESULTS: CD4+CD25+ cells from non-allergic controls were able to suppress influenza antigen and birch pollen stimulated effector cell proliferation, whereas CD4+CD25+ cells from allergic patients suppressed influenza antigen-, but not birch pollen-stimulated proliferation. The production of Th1 cytokines, but not Th2 cytokines, was suppressed by CD4+CD25+ cells from both allergic patients and controls, upon stimulation with birch pollen extract. Neutralization of IL-10 led to significantly increased production of IFN-gamma in cultures with CD4+CD25- T effector cells. In addition, six-fold higher concentrations of TNF-alpha were detected after neutralization of IL-10 in both CD4+CD25- and CD4+CD25+ cell cultures from allergic patients and controls. CONCLUSION: We demonstrate that the allergen-specific suppressive function of CD4+CD25+ cells from allergic patients is impaired compared with non-allergic controls. Moreover, neutralization of IL-10 enhances the production of TNF-alpha, suggesting counter-acting properties of IL-10 and TNF-alpha, where IL-10 promotes tolerance and suppression by Treg cells and TNF-alpha promotes inflammatory responses.     

解脲脲原体GrpE蛋白促进小鼠树突状细胞成熟并诱导Th1型免疫应答

目的:探讨解脲脲原体GrpE蛋白( Ureaplasma urealyticum GrpE, Uu-GrpE)对树突状细胞成熟的影响及其对T细胞极化的作用。 方法:表达纯化 Uu-GrpE蛋白并利用Western blot鉴定。分离培养小鼠骨髓来源树突状细胞(bone ma...     

Localized Wegener's granulomatosis: predominance of CD26 and IFN-gamma expression

The immune response in Wegener's granulomatosis (WG) has been characterized as a predominant, potentially pathogenic Th1-like reaction by blood T cells and T-cell clones from diseased tissues. To elucidate further the immunopathogenic mechanisms, this study analysed the phenotypes of inflammatory infiltrates in frozen nasal biopsies with involvement of the upper respiratory tract only (localized or 'initial phase' WG) and with multi-organ involvement, including systemic vasculitis (generalized WG). The expression and production of Th1 and Th2 cytokines were examined in tissue specimens and peripheral blood mononuclear cells (PBMCs) of localized and generalized WG. The number of CD3+ T cells in inflammatory infiltrates ranged from 50 to 70%, together with approximately 30% CD14+ monocytes/macrophages. An average of 40% of T cells expressed CD26 in nasal biopsies of localized WG, compared with about 16% in specimens of generalized WG. In parallel, a higher number of interferon-gamma (IFN-gamma)-positive cells were detected in nasal tissue of localized than in generalized WG. PBMCs from localized WG similarly exhibited higher spontaneous IFN-gamma production in contrast to generalized WG (207 vs. 3 pg/ml, p<0.05). Interleukin-4 (IL-4) mRNA was found in higher amounts in generalized than in localized WG. IL-4 production was negligible in both disease and controls. In addition, both IL-10 mRNA and IL-10 protein levels of activated PBMCs from localized WG were elevated when compared with generalized disease (574 vs. 154 pg/ml, p<0.05) or healthy controls (574 vs. 246 pg/ml, p<0.05). It is conluded that in nasal tissues, mainly CD4+/CD26+ T cells as well as IFN-gamma-positive cells may support a polarized Th1-like immune response. Furthermore, the data suggest that this in situ immune response is already initiated and established in localized WG, accompanied by increased peripheral IFN-gamma and IL-10 production.     

Th1、Th2样细胞因子对CD158+细胞比率的调节作用

目的:观察Th1、Th2样细胞因子对外周血CD158+细胞比率的调节作用,为寻找干细胞移植免疫耐受的方法提供论理依据。方法:将Th1样细胞因子(IL-2、IFN-γ)和Th2样细胞因子(IL-4、IL-6),单独或联合与人外周血单个核细胞(PBMC)培养72h,用流式细胞法分析总CD158a+、CD158b+细胞及CD3+、CD4+、CD8+和CD16+ CD56+细胞亚群中CD158a+、CD158b+细胞的比率。结果:①细胞因子对CD3+、CD4+、CD8+细胞及CD16+ CD56+细胞的影响:IL-2和IFN-γ均可增加上述细胞的百分率(P<0.05),但IL-2的作用大于IFN-γ(P<0.05)。IL-2+IFN-γ联合处理的效应高于IFN-γ单独处理(P<0.05)。IL-4+IL-6可降低上述细胞的百分率(P<0.05)。IL-2+IL-4对上述细胞百分率的影响,高于IL-4(P<0.05)但低于IL-2(P<0.05)。②细胞因子对CD158a+/b+细胞的影响:IL-2可增加总的CD158a+/b+细胞及CD3+、CD4+、CD8+和CD16+ CD56+细胞中的CD158a+/b+细胞的百分比率(P<0.05);IL-2+IFN-γ可增加CD158a+/b+细胞的百分率(P<0.05),但与IL-2单独处理无明显区别,IL-4+IL-6可降低CD158a+/b+细胞的百分率(P<0.05)。IL-2+IL-4可增加总的CD158a+/b+细胞及各亚群中CD158a+/b+细胞的百分率(P<0.05),但低于IL-2单独处理(P<0.05)。结论:IL-2有促进CD158基因表达或使CD158a+、CD158b+     

Endogenous IL-4 and IFN-gamma are essential for expression of Th2, but not Th1 cytokine message during the early differentiation of human CD4+ T helper cells

CD4+ T cells can be divided into several distinct effector subpopulations, including Th1 and Th2. Human Th1 cells are essential for the establishment of cellular immune responses, whereas Th2 cells for immunoglobulin E synthesize by B cells and immunoregulation. This study determines the involvement of exogenously and endogenously produced T cell-derived cytokines during early differentiation of naive CD4+ T cells into Th1 and Th2 cells. Cytokine gene expression of purified experienced and naive CD4+T cells in the presence or absence of Th-directing cytokines and neutralizing anti-cytokine antibodies, was determined at early (20 and 40 h) time points, after in vitro activation. These studies demonstrated that: (1) endogenously produced, T cell-derived cytokines (interferon [IFN]-gamma and interleukin [IL]-4), play an important role in the regulation of early gene expression of Th2, but not Th1 type cytokines; (2) Th1-related cytokines, IFN-gamma, and IL-2, are preferentially expressed in cultures directed toward Th1, as compared with Th2; and (3) IL-4 and IFN-gamma showed early message expression in both differentiating populations, indicating a mixed profile of Th1 and Th2 cytokine production in early human Th cell development. These findings point to the critical role for endogenously produced cytokines in the early differentiation of human Th1 or Th2 cells.     

灭活HIV-1颗粒对人CD4+T细胞活化和全血Th1/Th2细胞因子分泌的影响

目的：体外研究AT-2灭活的HIV-1颗粒对人CD4+T细胞活化和全血(whole blood，WB) Th1/Th2细胞因子分泌的影响。方法:AT-2灭活HIV-1ⅢB型病毒颗粒，运用ELISA法测定所制备的灭活病毒中p24抗原的含量，按照1/500、1/50和1/5 (V/V)的浓度加入到WB中，以植物血凝素(phytohemagglutinin，PHA)组为阳性对照；24 h后，收集WB培养上清，运用流式微球分析法（cytometric bead array，CBA）检测WB分泌Th1 (IL-2、IFN-γ和TNF-α)和Th2 (IL-4、IL-6和IL-10)细胞因子水平；同时运用免疫荧光抗体染色技术结合流式细胞术检测WB中CD4+T细胞早期活化标记分子CD69的表达百分率。结果:我们所制备的灭活病毒中p24抗原的含量为85.5 μg/L；24 h后，空白对照组中，CD4+T细胞CD69的表达百分率为(1.62±0.63)%，PHA组为(38.82±6.00)%，HIV-1(1/500)组为(3.83±1.07)%，HIV-1(1/50)组为(5.94±0.85)%，HIV-1(1/5)组为(9.30±1.22)%；空白对照组WB培养上清中细胞因子主要为IL-6和TNF-α，PHA组中Th1和Th2细胞因子全部升高，3个浓度的HIV-1组中Th1和Th2细胞因子也全部升高。结论:AT-2灭活的HIV-1ⅢB颗粒能够明显引起WB中CD4＋T细胞活化，并上调WB培养上清中Th1和Th2细胞因子的水平，其机制可能是除了HIV-1病毒蛋白的作用外，HIV-1出胞时，许多宿主细胞来源的免疫分子整合到病毒颗粒包膜中，而模拟抗原提呈细胞，从而产生免疫调节作用。     

Preclinical evaluation of cellular immune responses elicited by a polyvalent DNA prime/protein boost HIV-1 vaccine

While DNA vaccines have been shown to prime cellular immune responses, levels are often low in nonhuman primates or humans. Hence, efforts have been directed toward boosting responses by combining DNA with different vaccination modalities. To this end, a polyvalent DNA prime/protein boost vaccine, consisting of codon optimized HIV-1 env (A, B, C, E) and gag (C) and homologous gp120 proteins in QS-21, was evaluated in rhesus macaques and BALB/c mice. Humoral and cellular responses, detected following DNA immunization, were increased following protein boost in macaques and mice. In dissecting cellular immune responses in mice, protein-enhanced responses were found to be mediated by CD4+ and CD8+ T cells with a Th1 cytokine bias. Our study reveals that, in addition to augmenting humoral responses, protein boosting of DNA-primed animals augments cellular immune responses mediated by CD8+ CTL, CD4+ T-helper cells and Th1 cytokines; thus, offering much promise in controlling HIV-1 in vaccinees.     

佐剂性关节炎大鼠肺功能变化与Th1/Th2细胞、调节性T细胞的相关性研究

目的:探讨细胞因子、Th1/Th2细胞及调节性T细胞(Treg)、转录因子Foxp3在佐剂性关节炎(AA)大鼠肺功能损害中的作用机制。方法:将24只Wistar大鼠随机分为正常对照(NC)组和模型(Model)组,每组12只,向Model组大鼠右后足跖皮内注射弗氏完全佐剂0.1mL致炎,复制成AA模型。致炎48d后,观察两组大鼠足跖肿胀度(E)及关节炎指数(AI),HE染色观察肺组织病理学改变,计算两组大鼠肺系数(LI)、肺泡炎积分,免疫组化染色法检测Foxp3、TGF-β1蛋白表达情况。通过小动物肺功能仪检测肺功能,ELISA法测定细胞因子的变化,流式细胞术(FCM)测定Treg的表达。结果:与NC组相比,Model组大鼠E、AI、LI、1s内平均呼气流量(FEV1/FVC%)、肺泡炎积分、血清TNF-α、Th1/Th2、肺组织TGF-β1、CD4+ CD25- T细胞的表达水平明显升高,且两者差异有统计学意义(P<0.05或P<0.01);用力肺活量(FVC)、25%肺活量的最大呼气流量(FEF25)、50%肺活量的最大呼气流量(FEF50)、75%肺活量的最大呼气流量(FEF75)、最大呼气中期流量(MMF)、用力最大呼气流量(PEF)、肺动态顺应性(Cldyn)、血清IL-10、CD4+ Treg、CD4+ CD25- Treg、肺组织Foxp3蛋白表达水平显著降低(P<0.01)。Spearman相关分析结果显示,AA大鼠肺功能参数分别与E、AI、TNF-α、IL-10、Th1/Th2及CD4+ Treg、CD4+CD25+Treg、CD4+ CD25- T细胞、Foxp3、TGF-β1表达呈相关性,且相关有统计学意义(P<0.05或P<0.01)。结论:大鼠在致炎后对抗原刺激呈高敏反应状态,Th1/Th2状态失衡、CD4+ CD25- T细胞转化成CD4+ CD25+ Treg受阻,免疫调节功能紊乱,释放大量细胞因子和炎症介质,导致局部关节的病变和肺组织损害,从而发生AA肺功能降低。     

青少年吸毒者免疫细胞、细胞因子和生长激素的改变

目的：通过测定青少年吸食海洛因者外周血中T细胞亚群、Th1／1112细胞因子和血清中的生长激素，从分子水平探讨吸食海洛因对青少年免疫功能和生长发育的影响。方法：用微量全血直接免疫荧光染色，用流式细胞术检测外周血中T细胞亚群；流式细胞（Cytometric bead array，CBA）技术测定Th1／Th2细胞因子；化学发光法测定生长激素。结果：青少年吸食海洛因组（n=20）CD3^＋、CD3^＋＋CIM^＋、CD3^＋＋CIM^＋／CD3^＋＋CD8^＋、Th1细胞因子（IL-2，TNF-α和IFN-γ）和Th2细胞因子（IL-4，IL-10）低于健康组（n=23）（P〈0．01或0．05）；且Th1细胞因子下降程度大于Th2细胞因子（P〈0．05）；血清生长激素显著高于健康组（P〈0．01）。结论：海洛因降低青少年机体免疫功能，对细胞免疫的损伤大于体液免疫；海洛因能升高青少年血清生长激素，机制需进一步探讨。