胰岛素抵抗的慢性丙型肝炎患者外周血CD4+CD25+调节性T细胞的数量及其功能

目的 了解胰岛素抵抗的慢性丙型肝炎患者外周血CD4 +CD25+调节性T细胞(Treg)数量和功能的变化.方法 筛选40例HLA-A2+慢性丙型肝炎患者(其中20例合并胰岛素抵抗),流式细胞仪检测患者CD4+CD25+Treg细胞占外周血中CD4+T细胞的频率,液闪计数仪检测对HCV特异性CD8+T细胞增殖的抑制作用,ELISA法检测IFN-y水平.统计学处理采用t检验.结果 胰岛素抵抗的慢性丙型肝炎患者外周血CD4 +CD25+ Treg细胞占CD4+T细胞的(9.5±1.9)％,明显低于慢性丙型肝炎患者的(11.2±2.2)％(t=2.615,P＜0.05).胰岛素抵抗指数(HOMA-IR)≥4患者的CD4+CD25+ Treg细胞比例为(9.0±1.8)％,明显低于HOMA-IR＜4患者的(10.8±2.3)％(t=2.413,P＜0.05).胰岛素抵抗的慢性丙型肝炎患者CD4+CD25+ Treg细胞和去除Treg的外周血单个核细胞(PBMC)共培养上清液中IFN-y为(4 050±580) pg/mL,明显高于慢性丙型肝炎患者的(2 005±330)pg/mL(t=13.705,P＜0.01).HOMA-IR≥4患者IFN-y为(5 682±986)pg/mL,明显高于HOMA-IR＜4患者的(2 819±660) pg/mL(t=7.630,P＜0.01).结论 随着胰岛素抵抗程度加重,慢性丙型肝炎患者外周血CD4+ CD25+ Treg细胞频率减低,对HCV特异性CD8+T细胞增殖的抑制作用减弱.     

胸腺肽α1对慢性乙型肝炎CD4~+CD25~+CD127~(dim/-)调节性T淋巴细胞功能的影响

目的观察胸腺肽α1对慢性乙型肝炎CD4~+CD25~+CD127~(dim/-)调节性T淋巴细胞(Treg)功能的影响。方法选取2016年12月-2017年7月陕西省人民医院感染性疾病科收治的慢性乙型肝炎患者67例,其中38例接受恩替卡韦抗病毒治疗(对照组),29例接受恩替卡韦联合注射用胸腺肽α1治疗(治疗组),分别于治疗前后分离外周血单个核细胞,流式细胞术检测CD4~+CD25~+CD127~(dim/-)Treg水平,纯化CD4~+CD25~+CD127~(dim/-)Treg,与自体CD4+CD25-T淋巴细胞共培养,CCK-8法检测细胞增殖,ELISA法检测细胞因子分泌水平。计量资料2组间比较采用t检验,计数资料组间比较采用χ2检验。结果对照组、治疗组患者经治12周CD4~+CD25~+CD127~(dim/-)Treg均较基线水平明显下降,差异均有统计学意义(8.85±2.18)%vs(12.32±1.22)%、(9.26±2.30)%vs(13.71±2.32)%,t值分别为4.579、4.803,P值分别为0.0005、0.0003]。选取17例对照组患者和21例治疗组患者检测细胞因子分泌水平。经治12周对照组患者治疗12周后Treg与CD4+CD25-T淋巴细胞共培养系统中细胞增殖和分泌细胞因子水平均无明显变化;治疗组共培养系统中细胞计数较基线水平明显升高,差异有统计学意义[(3.66±0.95)×106个vs(2.07±0.51)×106个,t=5.709,P0.0001];治疗组共培养细胞分泌抑制性细胞因子IL-10、IL-35水平明显降低,差异均有统计学意义[(41.40±11.89)pg/ml vs(56.53±27.85)pg/ml、(122.9±9.98)pg/ml vs(130.0±15.98)pg/ml,t值分别为2.639、2.459,P值分别为0.019、0.028)],分泌抗病毒细胞因子IFNα、IFNγ水平明显升高,差异均有统计学意义[(297.5±83.56)pg/ml vs(235.6±67.72)pg/ml、(5.83±0.85)pg/ml vs(4.39±0.95)pg/ml,t值分别为2.603、4.659,P值分别0.017、0.0004]。结论胸腺肽α1能够抑制慢性乙型肝炎CD4~+CD25~+CD127~(dim/-)Treg水平及免疫抑制功能,提高患者免疫功能。     

子痫前期患者Th及外周血CD+4CD+25Tr的变化及意义

30例重度子痫前期患者(子痫前期组)及25例正常妊娠妇女(对照组)的外周血单个核细胞(PBMC)加入植物血凝素进行体外培养诱生,采用ELISA法测定PBMC培养上清液中的辅助性T淋巴细胞(Th)1型因子、白细胞介素(IL)-2、干扰素(IFN)-γ及Th2型因子IL-4的水平.流式细胞仪检测受检者外周血CD 4CD 25调节性T淋巴细胞(CD 4CD 25Tr)的表达.结果 子痫前期组IL-4为(207.92±34.89)pg/ml,对照组为(281.26±47.23)pg/ml,两组相比,P＜0.01;子痫前期组IL-2、IFN-γ为(511.26±134.45)、(2898.34±1245.67)pg/ml,对照组为(334.78±98.21)、(2012.12±678.23)pg/ml,两组相比,P均＜0.01.IFN-γ/IL-4在子痫前期组为12.47±5.93,明显高于对照组(7.89±2.34)(P＜0.05).子痫前期组外周血CD 4CD 25Tr占CD 4T细胞的比率(5.45%±1.46%)明显低于对照组的(11.56%±1.43%)(P＜0.01).认为子痫前期患者外周血存在Th1功能亢进和Th2功能减低,机体处于Th2→Th1的漂移状态,其外周血CD 4CD 25Tr数量减少可能促使Th1/Th2平衡向Th1偏移.二者相互作用可能在子痫前期的发病过程中发挥重要作用.     

激素抵抗性哮喘患者外周血CD4+CD25+Foxp3+调节性T细胞及IL-10、TGF-β1的变化及意义

目的 观察激素抵抗性哮喘(SRA)患者外周血CD4+CD25+Foxp3+调节性T细胞(Treg)及白介素10(IL-10)、转化生长因子β1(TGF-β1)的变化,分析其在SRA发病机制中的作用.方法 采用流式细胞术检测40例SRA患者(激素抵抗组)外周血单个核细胞CD4+CD25+Foxp3+ Treg数目,并计算CD4+CD25+Foxp3+ Treg占CD4+T淋巴细胞的百分比;酶联免疫吸附试验(ELISA)法检测其血清IL-10、TGF-β1水平,并与激素敏感性患者(激素敏感组,46例)及正常体检者(正常组,30例)进行对比.结果 激素抵抗组患者外周血CD4+CD25+Foxp3+Treg占CD4+T淋巴细胞的百分比、CD4+CD25+Foxp3+Treg绝对值及血清IL-10、TGF-β1水平均明显低于激素敏感组与正常组(P＜0.01,P＜0.05);激素敏感组患者外周血CD4+CD25+Foxp3+Treg占CD4+T淋巴细胞的百分比、CD4+CD25+Foxp3+Treg绝对值及血清TGF-β1水平明显低于正常组(P＜0.01,P＜0.05),血清IL-10无明显差异(P＞0.05);CD4+CD25+Foxp3+Treg/CD4+T及CD4+CD25+Foxp3+Treg绝对数均与血清IL-10、TGF-β1水平呈明显正相关(P＜0.01).结论 SRA患者外周血CD4+CD25+Foxp3+ Treg数目减少及IL-10、TGF-β1含量减低可能与SRA的发生、发展有关.     

激素抵抗性哮喘患者外周血CD4+CD25+Foxp3+调节性T细胞及IL-10、TGF-β1的变化及意义

目的 观察激素抵抗性哮喘(SRA)患者外周血CD4+ CD25+ Foxp3+调节性T细胞(Treg)及白介素10(IL-10)、转化生长因子β1(TGF-β1)的变化,分析其在SRA发病机制中的作用.方法 采用流式细胞术检测40例SRA患者(激素抵抗组)外周血单个核细胞CD4+ CD25+ Foxp3+ Treg数目,并计算CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的百分比;酶联免疫吸附试验(ELISA)法检测其血清IL-10、TGF-β1水平,并与激素敏感性患者(激素敏感组,46例)及正常体检者(正常组,30例)进行对比.结果 激素抵抗组患者外周血CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的百分比、CD4+ CD25+Foxp3+ Treg绝对值及血清IL-10、TGF-β1水平均明显低于激素敏感组与正常组(P＜0.01,P＜0.05);激素敏感组患者外周血CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的百分比、CD4+ CD25+ Foxp3+Treg绝对值及血清TGF-β1水平明显低于正常组(P＜0.01,P＜0.05),血清IL-10无明显差异(P＞0.05);CD4+ CD25+ Foxp3+ Treg/CD4+T及CD4+ CD25+ Foxp3+ Treg绝对数均与血清IL-10、TGF-β1水平呈明显正相关(P＜0.01).结论 SRA患者外周血CD4+ CD25+ Foxp3+ Treg数目减少及IL-10、TGF-β1含量减低可能与SRA的发生、发展有关.     

Treg/Th17细胞在不同时期慢性阻塞性肺疾病患者中的改变及意义探讨

目的 探讨CD4+ CD25+ CD127low调节性T细胞(Treg细胞)、Th17细胞特异性分泌因子IL-17在COPD急性加重期(AECOPD)及COPD稳定期中的改变及临床意义.方法 选取住院AECOPD患者26例,随访COPD稳定期患者20例,健康对照患者15例.流式细胞仪检测患者外周血CD4+ CD25+ CD1271.wTreg细胞比例、ELISA检测外周血IL-17浓度.结果 ①AECOPD组患者外周血Treg细胞比例较COPD稳定期组、对照组均明显升高[分别为(10.319±2.154)％,(6.406±1.498)％,(6.307±1.626)％;P＜0.05],COPD稳定期组患者Treg细胞比例高于对照组但差异无统计学意义;②A ECO PD组及COPD稳定期组外周血IL-17水平较对照组明显升高[分别为(0.813±0.233) ng/L,(o.547±0.157) ng/L,(0.408±0.169) ng/L;P＜0.001],AECOPD组IL-17水平高于COPD稳定期组(P＜0.01),COPD稳定期组IL-17水平高于对照组(P=0.046);③各组Treg细胞、IL-17水平与各指标之间未见相关性.结论 Treg细胞、IL-17在AECOPD及COPD稳定期中的水平异常说明在COPD的不同时期存在着不同的炎症,Treg/Th17细胞失衡可能导致COPD的免疫紊乱和慢性炎症持续.     

CD4~+ CD25~+调节性T细胞对慢性淋巴细胞白血病预后的影响

目的:探讨慢性淋巴细胞白血病(CLL)患者外周血CD4+CD25+调节性T细胞(Treg细胞)表达及其与预后的相关性。方法:采用流式细胞仪检测50例健康者(对照组)及30例CLL患者(CLL组)治疗前后CD4+CD25+Treg、CD4+CD25+Foxp3+Treg水平。结果:初诊CLL组患者外周血T淋巴细胞数量、CD4+CD25+Treg、CD4+CD25+Foxp3+Treg水平均显著高于对照组,差异有统计学意义(P0.05)。治疗后,CLL组患者外周血T淋巴细胞数量、CD4+CD25+Foxp3+Treg水平显著降低,与初诊时比较差异有统计学意义(P0.05),但仍高于对照组(P0.05)。CLL患者中,Binet临床分期A期患者CD4+CD25+Foxp3+Treg水平显著低于B/C期患者,差异有统计学意义(P0.05)。Spearman相关分析结果显示,Binet临床分期与CD4+CD25+Foxp3+Treg水平呈正相关(r=0.511,P0.05)。结论:CD4+CD25+Foxp3+Treg水平可能是评估CLL患者预后的有效指标。     

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.     

抗结核治疗对肺结核患者Th17/Treg的影响

目的分析抗结核治疗前后肺结核患者外周血(CD3+CD4+IL-17+)辅助性T细胞17(Th17)和(CD4+CD25+Foxp3+)调节性T细胞(Treg)平衡状态的变化及其临床意义。方法收集本院2014年10月至2015年5月感染科收治的肺结核患者80例,选择30例健康体检者作为对照组。流式细胞术检测患者抗结核药物治疗前、治疗6个月以及对照组的外周血Th17细胞和Treg细胞的表达,ELISA检测外周血中IL-17A的表达。结果流式结果显示,治疗前肺结核患者外周血Th17细胞,Treg细胞表达率为分别为(1.18±0.74)%、(7.68±0.92)%,均明显低于健康体检者((3.95±1.17)%,(4.17±1.12)%,P0.05);治疗6个月后肺结核患者外周血Th17细胞,Treg细胞表达率分别为(2.98±1.42)%,(5.26±0.72)%,均明显高于治疗前、但仍显著低于健康体检者(P0.05)。治疗前肺结核患者Th17/Treg为0.15±0.21,明显低于健康体检者(0.95±0.45,P0.05);治疗6个月后肺结核患者Th17/Treg为0.56±0.39,明显高于治疗前、但仍显著低于健康体检者(P0.05)。ELISA检测结果显示,治疗6个月后肺结核患者外周血IL-17A表达水平为39.06±5.83 pg/m L,明显高于治疗前、但仍显著低于健康体检者(P0.05)。结论结核分枝杆菌可破坏肺结核患者机体Th17/Treg平衡,抗结核治疗可缓解患者外周血Th17/Treg失衡状态。     

CD4~+LAP~+T细胞在慢性心力衰竭患者中的变化及意义

目的:探讨CD4+LAP+T细胞在慢性心力衰竭(CHF)患者中变化及意义。方法:本研究共纳入85例研究对象,其中CHF患者55例(病例组):缺血性心脏病(IHD)30例,非缺血性心脏病(NIHD)25例;对照组30例。采用流式细胞术分别测定病例组和对照组外周血中CD4+LAP+T细胞在CD4+T细胞中的比例;采用夹心酶联免疫法(ELISA)测定转化生长因子(TGF)-β1、白细胞介素(IL)-10的浓度。结果:病例组外周血中CD4+LAP+T/CD4+T细胞比例显著低于对照组[(2.23±0.76)%∶(3.66±0.84)%,P0.05];病例组血浆中TGF-β1的水平显著低于对照组[(256.52±78.74)pg/ml∶(386.83±85.27)pg/ml,P0.05],病例组血浆中IL-10水平显著低于对照组[(16.82±5.21)pg/ml∶(25.71±5.81)pg/ml,P0.05]。相关性分析提示CD4+LAP+T细胞比例与血浆TGF-β1、IL-10、左室射血分数呈显著正相关,与左室舒张末期内径、C-反应蛋白水平呈显著负相关。结论:CD4+LAP+T细胞比例在CHF患者中显著减少,相关细胞因子表达下调,预示CD4+LAP+T细胞减少在CHF的进展中发挥促进作用。     

Dysfunctional CD4+,CD25+ regulatory T cells in untreated active systemic lupus erythematosus secondary to interferon-alpha-producing antigen-presenting cells

OBJECTIVE: To explore whether there are extrinsic factors that impair the suppressive function of CD4+,CD25+ regulatory T cells in patients with untreated active systemic lupus erythematosus (SLE). METHODS: We studied 15 patients with untreated active SLE, 10 patients with SLE in remission, and 15 healthy control subjects. Percentages of CD4+,CD25+,FoxP3+ Treg cells and levels of forkhead box P3 (FoxP3) protein were analyzed by flow cytometry. Expression of messenger RNA (mRNA) for FoxP3 in purified Treg cell populations was assessed by real-time polymerase chain reaction analysis. Experiments examining Treg cell function in SLE were designed to distinguish primary from secondary T cell dysfunction. Levels of interferon-alpha (IFNalpha) in supernatants from the function assays were determined with an IFN-stimulated response element-luciferase reporter assay. RESULTS: The percentage of CD4+,CD25+, FoxP3+ cells in peripheral blood was significantly increased in SLE patients as compared with controls (mean +/- SEM 9.11 +/- 0.73% versus 4.78 +/- 0.43%; P < 0.0001). We found no difference in FoxP3 expression at either the mRNA or protein level in any CD4+,CD25+ T cell subset from SLE patients as compared with controls. Antigen-presenting cells (APCs) from SLE patients were responsible for decreased Treg cell activity and could also render dysfunctional Treg cells from healthy control subjects. CD4+,CD25+ Treg cells from SLE patients exhibited normal suppressive activity when cultured with APCs from healthy controls. A partial Treg cell blockade effect was induced by the high levels of IFNalpha derived from SLE patient APCs. CONCLUSION: We suggest that blockade of Treg cell-mediated suppression by IFNalpha-producing APCs in SLE patients may contribute to a pathogenic loss of peripheral tolerance in this disease.     

强直性脊柱炎患者外周血CD4+CD25+调节性T细胞的研究

目的 观察强直性脊柱炎(AS)患者外周血CD4+CD25调节性T细胞(Treg)的数量、功能及肿瘤坏死因子(TNF)-a 抑制剂治疗的影响.方法 活动性AS患者25例,10例给予etanercept治疗12周,健康对照21名,分离外周血单个核细胞(PBMC),流式细胞术检测CD4+CD25high T细胞比例;实时定量聚合酶链反应检测FOXP3 mRNA表达;免疫磁珠法去除CD25+细胞,可溶性噻唑盐(WST-1)法检测T细胞增殖.结果 活动性AS组CD4+CD25high T细胞比例与对照组差异尤统计学意义,但FOXP3 mRNA表达明显低于对照组(P＜0.01),并与C反应蛋白(CRP)呈负相关(P＜0.01).两组的CD4+CD25+细胞体外均能抑制T细胞增殖(P均＜0.01). Etanercept治疗明显增加CD4+CD25highT细胞比例和FOXP3 mRNA表达(P均＜0.01),与CRP降低呈负相关(P＜0.05;P＜0.01).结论 AS患者外周血表达FOXP3的CD4+CD25+Treg细胞异常,可能参与AS发生和发展;Etanercept治疗上调Treg细胞,可能是抗TNF-α治疗的一个机制.     

Evaluation of CD4+/CD25+/high/CD127low/- Regulatory T Cells in Rheumatoid Arthritis Patients

Background: Rheumatoid arthritis (RA) is the most common rheumatoid disease of unknown etiology, determined by the articular cartilage destruction and bone loss. The hallmark of RA is the defect in immune tolerance. Regulatory T cells (Treg) play a critical role in the protection of peripheral tolerance. Objective:  To assess the percentage of CD4+/CD25+/high/CD127low/- Treg cells in peripheral blood of RA patients as compared with the healthy individuals. Methods: The number of CD4+/CD25+/high/CD127low/- Treg cells was assessed by multicolor flow cytometry. The clinical disease activity of RA patients was determined by disease activity score 28 (DAS-28). The correlations of DAS-28 and erythrocyte sedimentation rate (ESR) with Treg cells were evaluated. Results: The percentage of CD4+/CD25+/high/CD127low/- Treg cells in peripheral blood of RA patients significantly decreased as compared with the healthy individuals (P= 0.0002). The percentage of CD4+/CD25+/high/CD127low/- Treg cells negatively correlated with DAS-28 and ESR. Conclusion: This study concludes that the defect of Treg cells plays a vital role in the pathogenesis of this disease. Further studies are necessary to determine the role of Treg cells in the clinical course of rheumatoid arthritis.     

Significance of the frequency of CD4+CD25+CD127- T-cells in patients with pulmonary tuberculosis and diabetes mellitus

Background and objective: Pulmonary tuberculosis and diabetes mellitus (DM) are closely associated. The objective of this study was to determine whether the expression of CD4+CD25+CD127? T‐cells (regulatory T‐cells (Treg)) is associated with diabetic pulmonary tuberculosis. Methods: Flow cytometry was used to determine the frequencies of CD4+CD25+ and CD4+CD25+CD127? T‐cells in peripheral blood, bronchoalveolar lavage fluid (BALF) and pleural effusions from 120 patients (30 with pulmonary tuberculosis and DM (TBDM), 30 with pulmonary tuberculosis without DM (TB), 30 with tuberculous pleurisy without DM (TBP) and 30 healthy volunteers). The concentrations of interferon (IFN)‐γ and interleukin (IL)‐10 in BALF and pleural effusions were determined by enzyme‐linked immunosorbent assay. Results: Treg frequencies in peripheral blood were significantly higher in patients with TBDM, TB and TBP than in the control group, with the frequency in TBDM being the highest (P < 0.01 for all). In TBP patients, Treg frequencies were significantly lower in pleural effusions than in peripheral blood. In TB patients, Treg frequencies in BALF and peripheral blood were not significantly different. However, in TBDM patients, Treg frequencies were significantly higher in BALF than in peripheral blood. IL‐10 expression was significantly higher, and IFN‐γ expression was significantly lower in BALF of TBDM patients compared with BALF and pleural effusions of TB patients. Conclusions: In patients with pulmonary tuberculosis and DM, the imbalance between Treg and effector T‐cells at pathological sites may be associated with weakened immunity and clinical manifestations of TB.     

系统性红斑狼疮患者外周血CD4+CD25highFoxp3+调节性T细胞数量和Foxp3mRNA的表达水平与疾病活动性的相关性

目的 研究系统性红斑狼疮(SEE)患者CD4+CD25highFoxp3+调节性T细胞的数量及其功能基因Foxp3 mRNA的表达水平与SLE疾病活动性和肾脏损伤的相关性.方法 采用四色流式细胞术以Foxp3-异硫氰酸荧光素(FITC )/CD25-藻红蛋白/CD4-多甲藻叶绿素蛋白(PerCP)/CD3-藻蓝蛋白7抗体组合检测40名健康对照者及42例SLE患者外周血CD4+CD25highFoxp3+调节性T细胞的数量,实时荧光定量聚合酶链反应(PCR)检测特异性转录因子Foxp3 mRNA的表达水平,并分析其与SLE患者疾病活动指数(SLEDAI)、补体C3及血清抗双链DNA(dsDNA)抗体的关系.统计学方法采用t检验和Spearman相关分析.结果 活动期SLE患者外周血CD4+CD25highFoxp3+调节性T细胞数量显著低于健康对照组[(4±3)％与(7±4)％,P＜0.05],稳定期与健康对照组差异无统计学意义(P＞0.05);活动期SLE患者外周血CD4+CD25highFoxp3+调节性T细胞数量及CD4+CD25highFoxp3+调节性T细胞/CD4+比值显著低于稳定期患者[(4±3)％,(9±6)％与(5±4)％,(10±6)％,P均＜0.05];活动期SLE患者外周血Foxp3 mRNA的表达水平明显低于稳定期和对照组(P＜0.01,P＜0.05);SLE患者并发肾病组外周血CD4+CD25highFoxp3+调节性T细胞数量及CD4+CD25highFoxp3+调节性T细胞/CD4+比值显著低于SLE非肾病组(P＜0.05).相关分析显示,SLE患者外周血CD4+CD25highFoxp3+调节性T细胞数量与SLEDAI呈负相关(r=-0.5782,P＜0.05);CD4+CD25highFoxp3+调节性T细胞/CD4+比值与SLEDAI呈负相关(r=-0.4913,P＜0.05),与补体C3呈正相关(r=0.3687,P＜0.05);SLE患者外周血CD4+CD25highFoxp3+调节性T细胞数量与Foxp3 mRNA的表达水平呈正相关(r=0.6142,P＜0.0l).结论 SLE患者外周血CD4+CD25highFoxp3+调节性T细胞和Foxp3 mRNA的变化可能是导致SLE疾病发生和发展的关键因素之一,与疾病的活动性有密切关系.     

慢性HBV感染者外周血CXCR5~+CD4~+Tfh细胞的测定及其与FoxP3~+Treg细胞的相关性

目的:探讨慢性乙型肝炎病毒(hepatitis Bvirus,HBV)感染不同阶段患者外周血CD4+T淋巴细胞中CD4+CXCR5+Tfh细胞及CD4+CD25+FoxP3+Treg细胞的百分比及其意义.方法:应用流式细胞术检测15例慢性无症状HBV携带者(chronic asymptomatic HBV carriers,AsC)、42例慢性乙型肝炎(chronic hepatitisB,CHB)患者(HBeAg阳性25例、HBeAg阴性17例)、11例非活动性HBsAg携带者(inactive HBsAg carriers,InC)外周血CD4+CXCR5+Tfh细胞及CD4+CD25+FoxP3+Treg细胞占CD4+T淋巴细胞的百分比,并与15例健康对照(healthycontrol,HC)进行比较.结果:AsC、HBeAg(+)CHB、HBeAg(-)CHB组外周血CD4+CXCR5+Tfh细胞占CD4+T淋巴细胞的比例分别为17.66(15.34%-20.56%),21.95(19.60%-26.32%),22.33(17.58%-24.85%),显著高于HC组的13.67(9.80%-15.32%),差异具有统计学意义(P<0.001).与AsC及InC组的16.11(12.33%-19.73%)相比,HBeAg(+)、HBeAg(-)CHB组外周血CD4+CXCR5+Tfh细胞占CD4+T淋巴细胞的比例显著升高(P<0.05).此外,AsC组外周血CD4+CD25+FoxP3+Treg细胞占CD4+T淋巴细胞的比例为7.70(6.35%-9.13%),显著高于HC组的6.53(5.54%-7.35%),P<0.05.HBeAg(+)CHB组外周血CD4+T淋巴细胞中CD4+CD25+FoxP3+Treg细胞的频率为7.52(6.09%-8.49%),与AsC组相比呈降低的趋势.外周血CD4+CXCR5+Tfh细胞占CD4+T淋巴细胞的比例与HBVDNA载量呈负性相关(r=-0.275,P<0.05);而与血清ALT水平、HBsAg滴度无相关性.结论:CD4+CXCR5+Tfh细胞可能参与了慢性HBV感染所介导的免疫反应,外周血CD4+CD25+FoxP3+Treg细胞及CD4+CXCR5+Tfh细胞的消长可能与疾病的活动性相关.     

系统性红斑狼疮患者CD4~+CD25~+CD127~(low/-)调节性T细胞中Foxp3的表达及免疫抑制功能研究

目的 研究系统性红斑狼疮(SEE)外周血中调节性T细胞不同标志以及调节性T细胞在SLE发病中的作用;探讨CD127与Foxp3的相关性,明确CD127定义调节性T细胞的特异性;鉴定CD4~+CD25~+CD127~(low/-)T淋巴细胞免疫抑制功能.方法 ①采用四色直接荧光素标记法和多参数流式细胞术检测40例SLE患者(19例初发和21例缓解)及15名健康对照外周血CD4~+CD25~+T淋巴细胞、CD4~+CD25~+CD127~(low-)T淋巴细胞、CD4~+CD25~+Foxp3~+T淋巴细胞、CD4~+CD25~(high)T淋巴细胞、CD4~+CD25~(high)CD127~(low/-)T淋巴细胞、CD4~+CD25~(high)Foxp3~+T淋巴细胞以及CD4~+CD127~(low/-)Foxp3~+T淋巴细胞占CD4~+T淋巴细胞的比率,并且将7种调节性T细胞比率与外周血抗双链DNA(dsDNA)等抗体及SLE疾病活动指数(SLEDA1)评分等进行相关性分析.②以流式细胞分选术结合细胞培养技术,检测和分析3例SLE患者和4名健康人外周血中CD4~+CD25~+CD127~(low/-)调节性T细胞对CD4~+CD25~-效应性T细胞增殖的抑制作用.采用两样本均数的t检验,重复测量的方差分析,Pearson相关与Spearman相关分析进行统计学处理.结果 ①SLE患者组7种调节性T细胞比率分别为(6.1±1.7)%,(3.1±1.3)%,(2.1±1.0)%,(1.6±0.3)%,(0.97±0.28)%,(0.69±0.23)%和(0.71±0.35)%.与健康对照组比较:SLE患者组前6种调节性T细胞比率均低于健康对照组(P<0.05).②SLE患者组:CD4~+CD25~+Foxp3~+、CD4~+CD25~(high)Foxp3~+T淋巴细胞比率与IgA呈正相关;CD4~+CD25~(high)CD127~(low/-)T淋巴细胞比率与抗SSB抗体呈正相关.③SLE患者初发组和缓解组比较:SLE患者初发组7种调节性T细胞中除CD4~+CD127~(low/-)Foxp3~+T淋巴细胞比率外,其余均低于缓解组(P<0.05).④SLE患者初发组治疗前后比较:激素治疗前6种调节性T细胞比率均低于激素治疗后(P<0.05).⑤SLE患者初发组、缓解组和对照组中,CD4~+CD25~+T淋巴细胞及CD4~+CD25~(high)T淋巴细胞中Foxp3的表达与CD127低表达均呈正相关.⑥SLE患者、健康人CD4+CD25-效应性T细胞的体外增殖都可以被自身CD4~+CD25~+CD127~(low/-)调节性T细胞所抑制,但SLE患者的抑制率明显低于健康对照.结论 SLE的免疫异常可能与调节性T细胞的数量和功能缺陷有关;CD127可能代替Foxp3作为调节性T细胞特异性的表面标记物.     

CD+4 CD+25调节性T细胞抑制持续性丙型肝炎病毒感染患者CD+4T细胞反应

目的探讨CD+4 CD+25调节性T细胞(CD+4 CD+25Treg细胞)在持续性HCV感染患者CD+4 T细胞下调中的意义.方法流式细胞术检测慢性丙型肝炎患者外周血中CD+4 CD+25Treg细胞的数量以及细胞内因子的合成;与正常人或患者CD+4 CD-25 T细胞共同培养,检测其抑制功能;RT-PCR检测Foxp3的mRNA表达.结果 CD+4 CD+25Treg细胞约占慢性丙型肝炎患者外周血中CD+4 T细胞的(13.5±1.8)%,高于正常对照(5.3±0.8)% (P=0.004);主要合成IL-10,高表达Foxp3;CD+4 CD+25Treg细胞显著抑制CD+4 T细胞的增殖,以及合成IFNγ,并且抑制活性较正常人增高(P=0.034),这种作用不依赖IL-10和转化生长因子β.结论持续性HCV感染患者CD+4 CD+25Treg细胞表达增加,抑制活性增强,特异性抑制Th1反应.     

CD4+CD25+Treg细胞与支气管哮喘

CD4+ CD25+ Treg细胞的主要作用表现为免疫无能性和免疫抑制性,是外周免疫耐受形成机制的主要组成部分.其主要作用机制为分泌抑制性细胞因子(IL-10和TGF-β)、表达细胞表面分子(CTLA-4、GITR等)及Foxp3等.支气管哮喘患者外周血CD4+ CD25+ Treg功能及数量存在异常,这可能是支气管哮...