外周血CD4^(+)CD25^(+)Treg细胞、TLR4、hCMV-IgM与动脉粥样硬化型急性脑梗死患者颈动脉粥样硬化的关系

目的探讨外周血CD4^(+)CD25^(+)Treg细胞、TLR4、人巨细胞病毒(hCMV)-IgM与动脉粥样硬化型急性脑梗死(As-ACI)患者颈动脉粥样硬化的关系。方法选取89例As-ACI患者(脑梗死组),另选取健康体检者43例(对照组)。根据颈内动脉超声结果将As-ACI患者分为内膜正常组、内膜增厚组、斑块组、狭窄组。比较各组外周血CD4^(+)CD25^(+)Treg细胞水平、单个核细胞TLR4表达水平、hCMV-IgM抗体阳性率和内膜中膜厚度(IMT)。分析As-ACI患者颈动脉狭窄的危险因素,分析CD4^(+)CD25^(+)Treg细胞、TLR4与IMT的相关性及其对颈动脉狭窄的预测价值。结果脑梗死组CD4^(+)CD25^(+)Treg细胞、HDLC水平低于对照组,TLR4表达、hCMV-IgM抗体阳性率、TC、TG、LDLC、hs-CRP水平、IMT高于对照组(P<0.05)。内膜正常组、内膜增厚组、斑块组、狭窄组CD4^(+)CD25^(+)Treg细胞水平依次降低,TLR4表达、hCMV-IgM抗体阳性率、IMT依次增高(P<0.05)。CD4^(+)CD25^(+)Treg细胞水平与IMT呈负相关,TLR4表达与IMT呈正相关(P<0.05)。高血压、CD4^(+)CD25^(+)Treg表达、TLR4表达、hCMV-IgM抗体阳性是As-ACI患者颈动脉狭窄的危险因素(P<0.05)。CD4^(+)CD25^(+)Treg细胞、TLR4表达水平联合检测的预测价值高于单独检测(P<0.05)。结论外周血CD4^(+)CD25^(+)Treg细胞、TLR4、hCMV-IgM抗体阳性率与As-ACI患者颈动脉粥样硬化进展有关,外周血CD4^(+)CD25^(+)Treg细胞、TLR4联合可以较好预测病变过程。

RhoA、CD4^(+)CD25^(+)调节性T细胞、MYBL2在胃癌患者中的表达及对预后和生存时间的影响

目的:探讨RhoA、CD4^(+)CD25^(+)调节性T细胞、成髓细胞瘤转录因子第2亚型(MYBL2)在胃癌患者中的表达及对预后和生存时间的影响。方法:选取2017年1月至2019年1月于本院就诊的134例胃癌患者术后癌组织标本作为研究对象,另选取其中62例胃癌患者相应的癌旁组织标本及40例同期非胃癌患者正常胃黏膜组织标本进行对照,检测癌组织、癌旁组织、正常胃黏膜组织中RhoA、CD4^(+)CD25^(+)调节性T细胞、MYBL2的表达情况,分析其对胃癌预后及生存时间的影响。结果:RhoA,CD4^(+)CD25^(+)调节性T细胞、MYBL2在癌组织中的阳性率均明显高于癌旁组织和正常胃黏膜组织(P<0.05)。胃癌患者术后平均生存时间为(28.61±1.34)个月,其中RhoA、CD4^(+)CD25^(+)调节性T细胞、MYBL2阳性患者的生存时间均短于阴性患者(P<0.05)。RhoA(+)、CD4^(+)CD25^(+)调节性T细胞(+)、MYBL2(+)是胃癌患者预后的危险因素(P<0.05)。结论:检测RhoA,CD4^(+)CD25^(+)调节性T细胞、MYBL2的表达可作为胃癌病情严重程度、预后及生存时间评估的重要补充手段。

外周血CD4^(+)CD25^(+)、CD8^(+)CD28^(+)调节性T细胞水平对早期宫颈癌患者腹腔镜根治术后预后的预测价值

目的分析外周血CD4^(+)CD25^(+)、CD8^(+)CD28^(+)调节性T细胞水平对早期宫颈癌(CC)患者腹腔镜根治术后预后的预测价值。方法招募2018年9月至2020年9月于儋州市人民医院接受腹腔镜根治术治疗的早期CC患者204例,根据患者术后随访期间预后情况分为预后不良组(43例)和预后良好组(161例)。比较两组临床资料。采用Spearman秩相关分析外周血CD4^(+)CD25^(+)调节性T细胞水平与CD8^(+)CD28^(+)调节性T细胞水平的相关性。采用多因素logistic回归分析早期CC患者腹腔镜根治术后预后不良的影响因素。采用受试者工作特征(ROC)曲线评估外周血CD4^(+)CD25^(+)、CD8^(+)CD28^(+)调节性T细胞水平对早期CC患者腹腔镜根治术后预后不良的预测价值。结果预后不良组CD4^(+)CD25^(+)调节性T细胞、癌胚抗原(CEA)、糖类抗原125(CA125)水平,术后切缘阳性占比以及术中宫旁浸润占比高于预后良好组,CD8^(+)CD28^(+)调节性T细胞水平低于预后良好组,差异有统计学意义(P<0.05)。Spearman秩相关分析结果显示,早期CC患者外周血CD4^(+)CD25^(+)调节性T细胞水平与CD8^(+)CD28^(+)调节性T细胞水平呈负相关(r_(s)=-0.478,P<0.05)。多因素logistic回归分析结果显示,较高的CEA、CA125、CD4^(+)CD25^(+)调节性T细胞水平是促进早期CC患者腹腔镜根治术后预后不良发生的独立危险因素(P<0.05),较高的CD8^(+)CD28^(+)调节性T细胞水平是抑制早期CC患者腹腔镜根治术后预后不良发生的独立保护因素(P<0.05)。ROC曲线分析结果显示,外周血CD4^(+)CD25^(+)、CD8^(+)CD28^(+)调节性T细胞水平能有效预测早期CC患者腹腔镜根治术后预后不良(P<0.05),两项指标联合可进一步提高预测效能[AUC(95%CI)=0.939(0.898~0.979),P<0.001],灵敏度和特异度分别为86.00%、88.20%。结论外周血CD4^(+)CD25^(+)、CD8^(+)CD28^(+)调节性T细胞水平与早期CC患者腹腔镜根治术后预后不良有关,二者能有效预测早期CC患者腹腔镜根治术后预后不良。

外周血CD4^(+)PD-1^(+)Tcells及CD4^(+)T淋巴细胞ATP含量与复发性卵巢癌疗效的相关性分析

目的 探讨外周血CD4^(+)程序性细胞死亡受体-1(PD-1)^(+)T cells及CD4^(+)T淋巴细胞三磷酸腺苷(ATP)含量与复发性卵巢癌疗效的相关性。方法 选取30例复发性卵巢癌患者为复发组,30例未复发卵巢癌患者为非复发组;另选取30名同期体检健康者作为对照组。评估外周血CD4^(+)PD-1^(+)T cells及CD4^(+)T淋巴细胞ATP含量与复发性卵巢癌疗效的相关性。结果 复发组和非复发组的CD4^(+)PD-1^(+)T cells较对照组明显升高(P<0.05)。复发组和非复发组的CD4^(+)T淋巴细胞ATP含量较对照组明显降低(P<0.05)。复发组治疗后CD4^(+)PD-1^(+)Tcells显著低于治疗前(P<0.05),治疗后CD4^(+)T淋巴细胞ATP含量显著高于治疗前(P<0.05)。CD4^(+)PD-1^(+)T cells与复发性卵巢癌疗效成负相关(r=-0.393,P=0.039),CD4^(+)T淋巴细胞ATP含量与复发性卵巢癌疗效成正相关(r=0.449,P=0.031)。结论 复发性卵巢癌患者外周血CD4^(+)PD-1^(+)T cells及CD4^(+)T淋巴细胞ATP含量与疗效密切相关。

急性非ST抬高心肌梗死患者外周血CD4^(+)CD25^(+)Foxp3^(+)Treg和IL-27变化的临床意义

目的观察急性非ST抬高心肌梗死患者(Non-STMI)治疗过程中外周血CD4^(+)CD25^(+)T/CD4^(+)T、CD4^(+)CD25highFoxp3^(+)Treg/CD4^(+)CD25high T比例及细胞因子TGF-β1、IL-10、INF-γ、IL-27的浓度变化,阐明Non-STMI患者是否存在调节性T细胞比例及功能异常。方法选取2012年8月至2016年4月入住中山大学附属第一医院急诊病房和CCU的Non-STMI40名,不稳定性心绞痛(UA)患者19名和同龄健康志愿者20名作为对照组(HC)。患者诊断明确后次日清晨和经规范治疗后5~7天,留取空腹外周血标本。流式细胞术检测CD4^(+)CD25^(+)T/CD4^(+)T、CD4^(+)CD25high Foxp3^(+)Treg/CD4^(+)CD25high T细胞。ELISA法检测细胞因子TGF-β1、IL-10、INF-γ和IL-27浓度。结果UA、Non-STMI组CD4^(+)CD25highFoxp3^(+)Treg/CD4^(+)CD25highT比例较HC组减低(P<0.01);Non-STMI明显低于UA组(P<0.05),而治疗后Non-STMI组Foxp3^(+)Treg细胞比例显著升高(P<0.05)。入院时Non-STMI和UA组TGF-β1、IL-10浓度较HC组明显降低(P<0.05),而INF-γ和IL-27浓度明显升高(P<0.05)。治疗后Non-STMI组IL-27迅速下降,而UA组变化不明显。治疗前IL-27浓度与CD4^(+)CD25highFoxp3^(+)Treg/CD4^(+)CD25highT呈线性负相关、与INF-γ浓度呈线性正相关。治疗后只有IL-27和CD4^(+)CD25high Foxp3^(+)Treg/CD4^(+)CD25highT呈线性负相关。结论Non-STMI患者CD4^(+)CD25highFoxp3^(+)Treg比例及功能异常,细胞因子IL-27有助于判断患者的临床疗效。

冷冻消融联合养肺方治疗对Lewis肺癌CD4^(+)CD25^(+)Foxp3^(+)Treg的影响及机制

目的 探讨冷冻消融联合养肺方治疗对Lewis肺癌CD4^(+)CD25^(+)Foxp3^(+)Treg细胞影响及机制。方法 构建C57BL/6小鼠肺癌皮下移植瘤模型,随机分为模型组、冷冻消融组、冷冻消融联合养肺方低、中、高剂量组,每组5只。模型组行假手术,在小鼠移植瘤部位切开缝合,其余各组均行双循环冷冻消融术。术后冷冻消融联合养肺方低、中、高剂量组分别给予1.64、3.28、6.56 g/kg养肺方灌胃,模型组、冷冻消融组分别给予等体积的生理盐水灌胃,均1次/d,连续给药14 d。给药期间观察并记录各组小鼠肿瘤体积,末次给药后剥离脾脏和移植瘤,称取瘤体质量并计算抑瘤率;流式细胞术检测脾脏CD4^(+)T、CD4^(+)CD25^(+)Foxp3^(+)T细胞比例;qRT-PCR和Western blot法检测瘤组织中Foxp3表达。结果 各组小鼠肿瘤体积均逐渐增长,增长速度为模型组>冷冻消融组>冷冻消融联合养肺方低剂量组>冷冻消融联合养肺方中剂量组>冷冻消融联合养肺方高剂量组。手术联合药物干预14 d后,与模型组比较,各治疗组肿瘤体积小(P<0.05);与冷冻消融组比较,冷冻消融联合养肺方低、中、高剂量组肿瘤体积小(P<0.01);冷冻消融联合养肺方高剂量组肿瘤体积小于低剂量组(P<0.01)。与模型组比较,冷冻消融联合养肺方低、中、高剂量组瘤体质量小(P<0.05);与冷冻消融组比较,冷冻消融联合养肺方低、中、高剂量组瘤体质量小(P<0.05)。冷冻消融组、冷冻消融联合养肺方低、中、高剂量组抑瘤率逐渐升高。与模型组比较,各治疗组CD4^(+)T细胞比例低(P<0.05),冷冻消融联合养肺方低、中、高剂量组的CD4^(+)CD25^(+)Foxp3^(+)T%细胞比例低(P<0.05);与冷冻消融组比较,冷冻消融联合养肺方高剂量组CD4^(+)T、CD4^(+)CD25^(+)Foxp3^(+)T细胞比例低(P<0.05);冷冻消融联合养肺方低、中、高剂量组CD4^(+)T、CD4^(+)CD25^(+)Foxp3^(+)T细胞比例逐渐降低。与模型组比较,冷冻消融联合养肺方低、中、高剂量组肿瘤组织中Foxp3 mRNA相对表达量和Foxp3蛋白表达均降低(P<0.01);冷冻消融联合养肺方中、高剂量组Foxp3 mRNA相对表达量和Foxp3蛋白表达均低于冷冻消融组(P<0.01)和冷冻消融联合养肺方低剂量组(P<0.05)。结论冷冻消融联合养肺方通过减少Lewis肺癌小鼠脾脏CD4^(+)CD25^(+)Foxp3^(+)Treg细胞比例,下调肿瘤组织中Foxp3表达,发挥抑制Lewis肺癌增殖作用,其机制可能与增强机体抗肿瘤免疫应答,改善肿瘤免疫抑制有关。

口腔扁平苔藓组织中IL-35表达水平与外周血CD4^(+)CD25^(+)Treg的相关性

目的探究口腔扁平苔藓(OLP)组织中白介素-35(IL-35)表达水平与外周血CD4^(+)CD25^(+)调节性T细胞(Treg)的相关性。方法收集2016年9月至2018年9月期间我院口腔科收治的口腔扁平苔藓患者38例,设为OLP组,另选同期来我院体检的健康人群20例作为对照组。取两组外周静脉血,荧光定量PCR检测外周血单个核细胞内IL-35两个亚基EB病毒诱导蛋白3(EBI3)、IL-12 p35和CD4^(+)CD25^(+)Treg标志物叉状头转录因子P3(FOXP3)的表达,酶联免疫吸附法检测血清IL-35、白介素-10(IL-10)、白介素-17(IL-17)和转化生长因子β1(TGF-β1)的含量,流式细胞仪检测外周血CD4^(+)CD25^(+)Treg细胞水平,分析IL-35和CD4^(+)CD25^(+)Treg水平与OLP患者临床病理特征之间的关系,Pearson法分析EBI3、IL-35与CD4^(+)CD25^(+)Treg的相关性。结果与对照组相比,OLP组外周血单个核细胞内EBI3、IL-12 p35、FOXP3的mRNA均显著上调(P<0.05)。与对照组相比,OLP组患者血清IL-35、IL-10、IL17、TGF-β1含量显著均上调,差异有统计学意义(P<0.05);与对照组相比,OLP组患者外周血CD4^(+)T细胞和CD4^(+)CD25^(+)Treg细胞水平均显著下降,差异有统计学意义(P<0.05);IL-35和CD4^(+)CD25^(+)Treg水平与患者基底细胞变性程度有关(P<0.05),而与性别、年龄、病程、疾病类型和淋巴细胞浸润无关(P>0.05)。OLP中IL-35与外周血CD4^(+)CD25^(+)Treg的水平呈正相关(r=0.3644,P<0.05)。结论OLP中IL-35与CD4^(+)CD25^(+)Treg表达均显著升高,且二者具有正相关关系。

Peripheral CD4^(+)CD8^(+) double positive T cells:A potential marker to evaluate renal impairment susceptibility during systemic lupus erythematosus

Lupus nephritis(LN) has a high incidence in systemic lupus erythematosus(SLE) patients, but there is a lack of sensitive predictive markers. The purpose of the study was to investigate the association between the CD4^(+)CD8^(+)double positive T(DPT) lymphocytes and LN. The study included patients with SLE without renal impairment(SLE-NRI), LN, nephritic syndrome(NS), or nephritis. Peripheral blood lymphocyte subsets were analyzed by flow cytometry. Biochemical measurements were performed with peripheral blood in accordance with the recommendations proposed by the National Center for Clinical Laboratories. The proportions of DPT cells in the LN group were significantly higher than that in the SLE-NRI group(t=4.012, P<0.001), NS group(t=3.240,P=0.001), and nephritis group(t=2.57, P=0.011). In the LN group, the risk of renal impairment increased significantly in a DPT cells proportion-dependent manner. The risk of LN was 5.136 times(95% confidence interval, 2.115–12.473) higher in cases with a high proportion of DPT cells than those whose proportion of DPT cells within the normal range. These findings indicated that the proportion of DPT cells could be a potential marker to evaluate LN susceptibility, and the interference of NS and nephritis could be effectively excluded when assessing the risk of renal impairment during SLE with DPT cell proportion.

Analysis of CD4^+CD25^+ Regulatory T Cells and Foxp3 mRNA in the Peripheral Blood of Patients with Asthma

The changes of CD4^＋CD25^＋ regulatory T cells （CD4^＋CD25^＋ Treg） and Foxp3 mRNA in peripheral blood mononuclear cells （PBMCs） from patients with asthma were investigated in order to elucidate the possible roles of CD4^＋CD25^＋ Treg in the development of asthma. The peripheral blood samples were collected from 29 healthy controls （normal control group） and 78 patients with asthma which included 30 patients in exacerbation group, 25 patients in persistent group, and 23 patients in remission group. By using flow cytometry and RT-PCR, the CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA in PBMCs were detected. The CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA in PBMCs of exacerbation and persistent groups were lower than that of remission and normal control groups （P〈0.05）. Although the CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA of remission group were also lower than that of normal control group, there was no significant difference between them （P〉0.05）. As compared with persistent group, exacerbation group had lower CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA （P〈0.05）. It was indicated that the decrease of CD4^＋CD25^＋ Treg ratio and its function in PBMCs may be responsible for pathogenesis of asthma.

Depletion of CD4^+CD25^+ regulatory T cells can promote local immunity to suppress tumor growth in benzo[a]pyrene-induced forestomach carcinoma

AIM： To elucidate the distribution of CD4^＋CD25^＋ regulatory T cells （Tregs） in different lymphoid tissues and its local enhancement on tumor growth before and after depletion of CD4^＋CD25^＋ Tregs. METHODS： Female ICR mice were garaged with benzo[a]pyrene （BaP） to induce forestomach carcinoma. CD4^＋CD25^＋ Tregs were intraperitoneally depleted with monoclonal antibody PC61. These mice were divided into BaP-only, BaP ＋ IgG, BaP ＋ PC61, and control groups. The forestomach of mice was dissected for histological analysis, and tunnel test was performed for apoptosis of tumor cells. CD4^＋CD25^＋ Tregs were sorted from different lymphoid tissues and expression of Foxp3, IL-10, and chemokine receptors was analyzed by flow cytometry, semi-quantitative and veal-time polymerase chain reaction. RESULTS： The mice gavaged with only BaP showed increased forestomach papilloma and carcinoma at wk 16 and 32. The proportion of CD4^＋CD25^＋ Tregs was significantly higher in peri-stomach regional lymph nodes than in other lymphoid tissues. These CD4^＋CD25^＋ Tregs in regional lymph nodes expressed higher levels of Foxp3 and IL-10, enriched in the CD62L-subset, and CCR1 and CCR5 chemokine receptors. In mice gavaged with BaP ＋ PC61, the number of tumor nodules and tumor volume decreased significantly with massive infiltrating cells and apoptosis of tumor cells. In the draining regional lymph nodes, the number of CD4^＋CD25^＋ Tregs also decreased significantly. CONCLUSION： Inducible and activated CD4^＋CD25^＋ Tregs in the draining regional lymph nodes suppress host local immunity during tumor growth. Depletion of CD4^＋CD25^＋ Tregs can promote host local immunity to suppress tumor growth.

Changes of CD4^+CD25^+ Regulatory T Cells in Patients with Acute Coronary Syndrome and the Effects of Atorvastatin

The function of CD4＋CD25＋ regulatory T lymphocytes （Treg） in patients with acute coronary syndrome （ACS） and the effects of atorvastatin were investigated. Forty-eight patients with ACS were randomly divided into two groups： group C receiving conventional therapy （n=24）, and group C＋A receiving conventional therapy＋atorvastatin （10 mg/day, n=24）. T lymphocytes from ACS patients （before and 2 weeks after the treatment） or 18 healthy subjects were separated and the flow cytometry was used to measure the percentage of Treg. The inhibitory ability of Treg on effector T cells was determined by mixed lymphocyte reaction （MLR）. ELISA was used to measure the serum levels of cytokines （IL-10, TGF-β1 and IFN-γ） before and after treatment. The results showed that as compared with normal control group, Treg percentage was decreased significantly （P〈0.01）, the inhibitory ability of Treg on the T lymphocytes proliferation was reduced （P〈0.01）, IFN-γ levels were increased and IL-10 and TGF-β1 levels were lowered in ACS patients. After treatment with atorvastatin, Treg percentage and the inhibitory ability of Treg on T lymphocytes proliferation were significantly increased in ACS patients. Serum IFN-γ was decreased significantly, while IL-10 and TGF-β1 were elevated significantly as compared with the non-atorvastatin group. The number of Treg was positively correlated with serum TGF-β1, but negatively with serum IFN-γ and CRP. It was concluded that ACS was associated with decreased number and defected function of Treg, which may play an important role in initiating immune-inflammatory response in ACS. The inhibitory effects of atorvastatin on inflammation in ACS may be due to its beneficial effects on Treg and restoration of immune homeostasis.

Increase of CD4^+CD25^+ T cells in Smad3^(-/-) mice

AIM： To investigate the changes of lymphocyte subpopulations, especially CD4^＋CD25^ T regulatory cells in Smad3^-/- mice. METHODS： Hematological changes and changes of lymphocyte subpopulations were detected in Smad3＂/- mice using cell counter and flow cytometry, respectively, and compared to their littermate controls. RESULTS： The numbers of neutrophils and lymphocytes in peripheral blood were significantly increased in Smad3^-/- mice compared to littermate controls. CD19^＋ expressing cells in blood and spleen, and CD8^＋ T cells in thymus were all markedly decreased in Smad3^-/- mice. More important, Smad3^-/- mice had an increased population of CD4^＋CD25^＋ T cells in peripheral lymphoid tissues, including thymus, spleen, and lymph nodes. CONCLUSION： These observations suggest that the changes of lymphocyte subpopulations might play a role in susceptibility to inflammation of Smad3^-/- mice.

Influence of Danshen Injection on airway inflammation and CD4^+ CD25^+ regulatory T cells of asthmatic rats

Objective： To investigate the influence of Danshen Injection on airway inflammation and CD4^＋CD25^＋ regulatory T cells（CD4^＋CD25^＋ Tr） of asthmatic rats, and elucidate the possible mechanism of Danshen Injection in treatment of asthma. Methods： 30 Wister rats were randomly divided into control group, asthma group and Danshen Injection treated group. Bronchoalveolar lavage fluids （BALF） were collected, and cytology studies were conducted. Lung tissues were obtained and pathologic analyses were done with hematoxylin and eosin stain （HE）. Flow cytometry was used to detect the CD4^＋CD25^＋ Tr ratio in peripheral blood mononuclear cells （PBMCs）. Results： Total cell, the percentage of lymphocytes, neutrophils and eosinophils （Eos） in BALF of Danshen Injection-treated group were lower than that in asthma group （P〈0.05, P〈0.01）. Compared with asthma group, less infiltration of inflammatory cells in lung tissues was observed in Danshen Injection-treated group. CD4^＋CD25^＋ Tr of asthma group was lower than that of control and Danshen Injection treated group （P〈0.05）. Conclusion： Danshen Injection can suppress airway inflammation of asthmatic rats, probably by increasing the number of CD4^＋CD25^＋ Tr.

Isolation and identification of CD4^+CD25^+ regulatory T cells in rat

Objective： To establish a stable and high efficient method for collection of CD4^＋CD25^＋ regulatory T cells from rats in vitro. Methods： CD4^＋CD25^＋ regulatory T cells were isolated from the rat splenic cells through two steps by magic cell sorting （MACS） system. The first step was negative selection of CD4^＋T cells by cocktail antibodies and anti-IgG magic microbeads, and the second step was positive selection of CD25^＋T cells by anti-CD25 PE and anti-PE magic microbeads. The purity and viability of separated cells were measured by flow cytometry （FACS） and Trypan blue staining. The suppressive ability of seperated cells on the proliferation of CD4^＋CD25^- T cells was assessed by cell proliferation assay. Results： The purity of negatively enriched CD4^＋ T cells was 79%-87% （83.6%±2.5% ） , and the purity of positively enriched CD4^＋CD25^＋ T cells was 86%- 93% （ 90.2±1.8% ） with the viability of 92%～95% （92.8% ± 3.4% ）. The enriched cells significantly suppressed the proliferation of CD4^＋CD25^- T cells in mixed lymphocyte culture （P 〈 0.05）. Conclusion： An effective method can be established for enrichment of CD4^＋CD25^＋ regulatory T cells in two steps by MACS, with satisfied cell purity, viability and function.

CD4^+CD25^(high) Regulatory Cells in Peripheral Blood of NSCLC Patients

The proportion and changes of CD4^＋CD25^high regulatory T cells （Trs） in peripheral blood of non-small cell lung cancer （NSCLC） patients were analyzed and their clinical significance explored. The peripheral blood was collected from 61 patients with NSCLC and 15 healthy controls. By using monoclonal antibodies, the blood samples were evaluated with the flow cytometry for lymphocyte subsets （CD3^＋, CD4^＋ and CD8^＋） and CD4^＋CD25^high Tr cells. The results showed that the proportion of CD4^＋CD25^high Tr cells in NSCLC group was significantly higher than in control group [（4.36 ±2.07） % vs （2.04±1.03） %, P〈0.01]. The proportion of CD4^＋CD25^ high Tr cells in late stage was higher than that in early stage [stages Ⅰ ＋Ⅱ （2.264±0.6） %; stage Ⅲ（3.284± 1.38） %; stage IV （6.06 4±4.08） %] （P〈0.05）. Kaplan-Meier survival analysis revealed that the prognosis of the patients who had higher proportion of CD4^＋CD25^high Tr cells in peripheral blood was worse （P=0.0026）. In conclusion, the relative increase in CD4^＋CD25^high Tr cells in peripheral blood may be related to im- munosuppression and tumor progression in patients with NSCLC. This finding suggests that CD4^＋CD25^high Tr cells in peripheral blood of NSCLC may be positive for prognosis analysis. The use of depletion of the CD4^＋CD25^high Tr cell therapy to treat NSCLC patients may be an effective strategy.

胃癌患者血清CA72-4、CEA、CA19-9水平与CD4^(+)CD25^(+)Treg细胞比例的相关性及临床意义

目的探讨胃癌患者血清糖类抗原72-4(CA72-4)、癌胚抗原(CEA)、糖类抗原19-9(CA19-9)水平与外周血CD4^(+)CD25^(+)调节性T(Treg)细胞比例的相关性和临床意义。方法回顾性分析2020年1月至2022年12月在西安长安医院就诊的胃癌患者68例作为胃癌组,另选取同期体检的健康志愿者50例作为对照组。检测并比较两组患者血清CA72-4、CEA、CA19-9水平及外周血CD4^(+)CD25^(+)Treg细胞比例。比较胃癌组不同临床资料患者的CA72-4、CEA、CA19-9水平及CD4^(+)CD25^(+)Treg细胞比例,采用Pearson相关分析胃癌组CA72-4、CEA、CA19-9水平与CD4^(+)CD25^(+)Treg细胞比例的相关性。结果胃癌组血清CA72-4、CEA、CA19-9水平及外周血CD4^(+)CD25^(+)Treg细胞比例比对照组高,差异均有统计学意义(P<0.05)。胃癌组TNM分期为Ⅲ~Ⅳ期患者的CA72-4、CEA、CA19-9水平及CD4^(+)CD25^(+)Treg细胞比例比Ⅰ~Ⅱ期患者高,高~中分化程度患者CA72-4、CEA、CA19-9水平比低分化程度患者低,淋巴结转移患者的CA72-4、CEA、CA19-9水平及CD4^(+)CD25^(+)Treg细胞比例比淋巴结未转移患者高,差异均有统计学意义(P<0.05)。胃癌组血清CA72-4、CEA、CA19-9水平与CD4^(+)CD25^(+)Treg细胞比例均呈正相关(r=0.587,0.678,0.696,P<0.05)。结论胃癌患者血清CA72-4、CEA、CA19-9水平及外周血CD4^(+)CD25^(+)Treg细胞比例明显升高且存在正相关性,与胃癌的发生、发展及肿瘤浸润转移密切相关;CD4^(+)CD25^(+)Treg细胞比例随肿瘤负荷的变化而变化,对胃癌患者病情评估、监测机体免疫状态及判断预后具有一定临床价值。

类风湿性关节炎患者抗环瓜氨酸肽抗体、CD4^(+)CD25^(+)调节性T细胞与类风湿因子的检验价值分析

目的探讨抗环瓜氨酸肽抗体(Anti-CCP)、CD4^(+)CD25^(+)调节性T细胞与类风湿因子(RF)在类风湿性关节炎患者中的检出结果及意义。方法选取2019年1月至2021年5月的昆明市延安医院的130例疑似类风湿性关节炎患者作为研究对象,进行Anti-CCP、CD4^(+)CD25^(+)调节性T细胞与RF水平进行检测,以晨僵持续1 h以上、3组关节肿胀与特异性抗体检测阳性作为金标准,分析上述指标的诊断效能,并对比类风湿性关节炎患者和非类风湿性关节炎患者的上述指标水平、不同活动度的类风湿性关节炎患者的指标水平。结果RF、Anti-CCP与CD4^(+)CD25^(+)调节性T细胞检测对类风湿性关节炎的诊断准确率为97.69%、特异度为98.11%、敏感度为97.70%、阳性预测值为98.84%、阴性预测值为96.30%。类风湿性关节炎患者的RF平均值、Anti-CCP平均值指标高于非类风湿性关节炎患者,且CD4^(+)CD25^(+)调节性T细胞低于非类风湿性关节炎患者,差异有统计学意义(P<0.05)。高度活动组患者RF平均值、Anti-CCP平均值高于低中度活动组,且CD4^(+)CD25^(+)调节性T细胞低于低中度活动组,差异有统计学意义(P<0.05)。结论Anti-CCP、CD4^(+)CD25^(+)调节性T细胞与RF指标检测有助于对类风湿性关节炎患者进行鉴别,并判断患者的疾病活动情况。

25-羟基胆固醇通过调控干扰素调节因子4抑制CD4^(+)T细胞IL-17的表达

目的探讨25-羟基胆固醇(25-hydroxycholesterol,25-HC)对人外周血单个核细胞(PBMCs)产生IL-17的抑制作用及其机制。方法用抗人CD3抗体联合抗CD28抗体刺激培养外周血单个核细胞(PBMCs)和纯化CD4^(+)T细胞,加或不加25-HC进行培养,ELISA、ELISPOT和PCR检测IL-17和IFN-γ的表达;流式细胞术检测T细胞转录因子(RORγt、RUNX1和IRF4)的表达、细胞表面活化分子的表达以及T细胞分裂增殖情况。通过电转染过表达IRF4,检测其对IL-17表达的影响。结果25-HC呈时间和剂量依赖的方式抑制T细胞产生IL-17,且主要抑制CD4^(+)T细胞中IL-17的表达。进一步研究发现,25-HC抑制T细胞晚期活化分子的表达和细胞分裂增殖,抑制IL-17相关转录因子IRF4的表达;过表达IRF4后,25-HC对IL-17表达的抑制作用被恢复。结论25-HC抑制Th17细胞的活化和增殖,并通过下调IRF4的表达抑制CD4^(+)T细胞产生IL-17。25-HC可能是IL-17相关炎症性疾病的一个具有前景的调控靶点。

肺癌患者CD4^+ CD25^(high) Foxp3^+调节性T细胞的格局变化及意义

目的:研究肺癌患者外周血(PBMC)及肿瘤浸润淋巴细胞(TIL)中CD4+CD25h ighFoxp3+调节性T细胞(Treg)的比例改变,探讨其在抗肿瘤免疫中的调节作用。方法:分离肺癌患者PBMC及TIL,FACS分析CD4+/CD8+T细胞的比值及CD4+CD25h ighT细胞占CD4+T细胞的比例。Real-tim e PCR检测Treg特异性转录因子Foxp3基因在PBMC及TIL中的表达。结果:肺癌患者PBMC及TIL中CD4+/CD8+比值降低;而CD4+CD25h ighT细胞在CD4+T细胞中所占比例升高;Foxp3基因仅在TIL中高表达,而在PBMC中低或不表达,表明肿瘤局部的CD4+CD25h ighT细胞主要是CD4+CD25h ighFoxp3+Treg。结合临床资料分析显示Treg在肺腺癌比例较高。结论:CD4+CD25h ighFoxp3+Treg在肺癌患者肿瘤浸润淋巴细胞中明显升高,可能与其通过细胞与细胞间接触抑制CD8+T细胞的杀伤效应,最终发挥免疫抑制效应相关。

补肾活血方联合地屈孕酮对复发性自然流产患者CD4^+CD25^+调节性T细胞及IL-10、TGF-β1表达的影响

目的:探讨补肾活血方联合地屈孕酮治疗复发性自然流产(RSA)的疗效及免疫调节机制。方法:选择肾虚血瘀型RSA妊娠患者62例,随机分为中药组(21例)、西药组(20例)、中西药组(21例)。中药组采用自拟补肾活血方治疗,西药组采用地屈孕酮治疗,中西药组采用两者联合治疗。同时选正常妊娠者20例为正常对照组,不予任何药物治疗。观察各组治疗前后临床疗效、流式细胞仪测定外周血CD4+CD25+调节性T细胞百分率,ELISA法检测血清IL-10、TGF-β1水平。结果:中西药组临床综合疗效优于其余两组,但差异无统计学意义(P>0.05),中药组和西药组疗效比较,差异亦无统计学意义(P>0.05)。治疗组各组治疗后较治疗前外周血CD4+CD25+调节性T细胞百分率、血清IL-10及TGF-β1水平均明显升高(P<0.05)。治疗后与中药组、西药组相比,中西药组外周血CD4+CD25+调节性T细胞百分率、血清IL-10及TGF-β1水平升高(P<0.05),中药组与西药组间比较,则均无统计学意义(P>0.05)。结论:补肾活血方联合地屈孕酮治疗肾虚血瘀型RSA临床疗效确切,从整体上调节免疫耐受状态,使妊娠得以维持。