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 exac-erbation 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.     

fas介导系统性红斑狼疮患者Foxp3+CD4+CD25+Treg细胞凋亡的研究

目的 探讨fas凋亡信号传导途径在系统性红斑狼疮(SLE)患者Foxp3+CD4+CD25+Treg凋亡异常中的作用.方法 选取活动期SLE患者25例、缓解期SLE患者20例及健康对照25名为研究对象,检测所有研究对象外周血Foxp3+CD4+CD25+Treg表面fas的表达,同时分析CD4+CD25+T细胞Foxp3表达.并分别将fas表达率及Foxp3表达率与病情活动性(SLEDAI评分)进行相关分析.结果 (1)外周血Foxp3+CD4+CD25+Treg上fas的表达:活动期SLE组为(23.72±2.35)%,缓解期SLE组为(14.0±2.1)%,对照组为(10.1±1.2)%,在活动期SLE组明显高于缓解期SLE组(P＜0.01)和对照组(P＜0.01),而缓解期SLE组与对照组差异无统计学意义(P＞0.05),fas在Foxp3+CD4+CD25+Treg上的表达与SLEDAI评分呈正相关(r=0.336,P＜0.05).(2)外周血CD4+CD25+T细胞Foxp3的表达:活动期SLE组为(2.83±0.30)%,缓解期SLE组为(5.38±0.63)%,对照组为(8.12-±0.70)%.活动期SLE组外周血 CD4+CD25+T细胞Foxp3表达明显低于缓解期SLE组(P＜0.01)和对照组(P＜0.01);而缓解期SLE组亦低于对照组(P＜0.05).外周血Foxp3表达与SLEDAI评分呈负相关(r=-0.581,P＜0.01).(3)Foxp3与fas的表达呈负相关(r=-0.349,P＜0.01).结论 SLE患者中存在由fas介导的Foxp3+CD4+CD25+Treg的过度凋亡,这可能是导致SLE病情活动的机制之一.

Abstract：

Objective To explore the role of fas apoptosis signal transduction pathway in the abnormal apoptosis of Foxp3 + CD4 + CD25 + Treg in patients with systemic lupus erythematosus ( SLE ).Methods Twenty-five active SLE patients, 20 remission SLE patients and 25 controls were selected. The level of fas expression on peripheral blood Foxp3 + CD4 + CD25 + Treg surface was detected in SLE patients.And analyzed the expression rate of Foxp3 on CD4 + CD25 + T cells was analyzed to explore the relationship between the expression rate and disease activity. Results ( 1 ) The expression rate of fas on Foxp3 + CD4 +CD25 + Treg was (23.72 ± 2. 35 )% , ( 14. 0 ± 2. 1 )% in active and remission SLE groups respectively versus ( 10. 1 ± 1.2)% in control group. The fas expression rate of active SLE group was significantly higher than those of remission SLE group( P ＜ 0. 01 ) and control group ( P ＜ 0. 01 ). And the remission SLE and control groups were not statistically significant ( P ＞0. 05 ). The expression rate of fas on the Foxp3 + CD4 +CD25 + Treg was positively correlated with the SLEDAI ( SLE disease activity index ) score ( r = 0. 336, P ＜0.05). (2) The expression rate of Foxp3 on CD4 +CD25 +T cells was (2.83 ±0.30)%, (5.38 ±0. 63 ) % in active and remission SLE groups respectively versus ( 8. 12 ± 0. 70 ) % in control group. The expression rate of Foxp3 was significantly lower in active SLE group than that in remission SLE group ( P ＜0. 01 )and control group( P ＜0. 01 ). And the Foxp3 expression rate of remission group was also lower than that of control group ( P ＜ 0.05 ). The expression rate of Foxp3 was negatively correlated with the SLEDAI score (r = -0. 581, P ＜ 0. 01 ). (3) The expression rate of Foxp3 was negatively correlated with fas (r=- 0. 349, P ＜ 0. 01 ). Conclusion The abnormal apoptosis of Foxp3 + CD4 + CD25 + Treg mediated by the fas apoptosis signal transduction pathway may be one of the pathogenic mechanisms of disease activity in SLE patients.     

Transplantation tolerance mediated by regulatory T cells in mice

Background With potent suppressive effect on responder T cells, CD4+CD25+ regulatory T (Treg) cells have become the focus of attention only recently and they may play an important role in transplantation tolerance. However, the mechanism of action is not clear. This study was designed to assess the possibility of using CD4+CD25+ Treg cells to induce transplantation tolerance and to investigate their mechanism of action.Methods CD4+CD25+ Treg cells were isolated using magnetic cell separation techniques. Mixed lymphocyte reactions were used to assess the ability of Treg cells to suppress effector T cells. Before skin transplantation, various numbers of CD4+CD25+Treg cells, which have been induced using complex skin antigens from the donor, were injected into the host mice either intraperitoneally ［0.5×10(5), 1×10（5）, 2×10（5）, 3×10（5）, 4×10（5）, or 5×10（5）］ or by injection through the tail vein ［5×10（3）, 1×10（4）, 2×10（4）, 5×10（4）, 1×10（5）, 2×10（5）］. Skin grafts from two different donor types were used to assess whether the induced Treg cells were antigen-specific. The survival time of the allografts were observed. Single photon emission computed tomography was also used to determine the distribution of Treg cells before and after transplantation. Results Treg cells have suppressive effect on mixed lymphocyte reactions. Grafts survived longer in mice receiving CD4+CD25+ Treg cell injections than in control mice. There was a significant difference between groups receiving intraperitoneal injection of either 2×10（5） or 3×10（5） CD4+CD25+Treg cells and the control group (P&lt;0.05, respectively). Better results were achieved when Treg cells were injected via the tail vein than when injected intraperitoneally. The transplantation tolerance induced by CD4+CD25+ Treg cells was donor-specific. Analysis of the localization of Treg cells revealed that Treg cells mainly migrated from the liver to the allografts and the spleen.Conclusions CD4+CD25+Treg cells can induce donor-specific transplantation tolerance. Cell-to-cell contact may be the primary mechanism by which Treg cells act on effector T cells.     

Targeting Foxp3+ regulatory T cells-related immunosuppression for cancer immunotherapy

Objective To review the current research into Foxp3^＋ regulatory T cells （Treg） cell surface molecules, plasticity of Treg cells and mechanisms of Treg cell suppression and to explore the possibilities to interfere in Treg cell suppression of anti-tumor immunity. Data sources A literature search of all English articles was performed on the online electronic PubMed database dated 1995 to 2010. The keywords searched included： CD4^＋CD25^＋Foxp3^＋ regulatory T lymphocytes, cancer, and immunotherapy. After finding relevant articles within these search limits, a manual search was conducted through the references from these articles. Study selection Articles regarding the role of Treg cells in tumor immunity and the utility of Treg cells in tumor immunotherapy. Results The results show that significant numbers of Treg cells are found in many tumors and it has been shown that the number of tumor infiltrating Treg cells correlates with adverse clinic outcomes. Treg cells are emerging as a key component of acquired tolerance to tumors. Conclusions Several mechanisms of immunosuppression can be mediated by Treg cell function. Distinct immunosuppressive molecules expressed by Treg cells or diverse molecules related to Treg induction or migration represent potential drug targets for caner immunotherapy.     

Involvement of CD4^＋CD25^＋ regulatory T cells in the pathogenesis of polycythaemia vera

Background Regulatory T cells （mreg） have been shown to play an important role in the regulation of hematopoietic activity. However, there is no information about the effect of Treg cells in the pathogenesis of polycythaemia vera （PV）. Methods In this study, we investigated the percentage and function of Treg cells in the peripheral blood of 21 PV patients and 25 healthy donors, mreg cells were identified and characterized as CD4^＋CD25^＋FOXP3^＋ by flow cytometry. The suppressive activity of CD4^＋CD25^＋ Treg cells was assessed by the proliferation and cytokine secretion of the co-cultured CD4^＋CD25^- fractions. Results The results showed that the percentage of Treg cells in the peripheral blood of PV patients significantly increased compared to healthy controls （（10.93±4.02）% vs （5.86±1.99）%, P 〈0.05）. Moreover, the mRNA and protein expression of FOXP3 was higher in CD4^＋CD25^＋ Treg cells. Coordinately, when co-cultured with the activated CD4^＋CD25^- cells, the CD4^＋CD25^＋ Treg cells showed enhanced suppressive function in PV. Yet, the underlying mechanism for the increased frequency and function of CD4^＋CD25^＋ Treg cells is still to be clarified. Conclusion Treg cells expansion might account for the abnormal T cell immunity in PV patients and thus contribute to the pathogenesis of PV.     

Acupuncture Regulates the Balance of CD4+ T Cell Subtypes in Experimental Asthma Mice

Objective: To evaluate the involvement of different CD4+ T cell subtypes in the anti-asthmatic effects of acupuncture in asthmatic mice. Methods: BALB/c mice were challenged by ovalbumin(OVA) for the establishment of experimental asthma model. Mice were divided into 4 groups by a random number table including the normal control, asthma model, acupuncture and sham acupuncture groups(14 per group). Acupoints Dazhui(GV 14), bilateral Fengmen(BL 12) and Feishu(BL 13) were selected for manual acupuncture treatment every other day for 4 weeks and Huantiao(GB 30) was selected for sham acupuncture. Airway hyperresponsiveness was examined by Buxco Pulmonary System. Pulmonary histopathology analysis was performed for inflammatory cell infiltration and mucus hypersecretion by haematoxylin eosin staining and periodic acid-Schiff staining. Inflammatory mediators assays of serum were investigated by enzyme-linked immunosorbent assay and Bio-Plex. CD4+ T cell subpopulations including the expression levels of important factors in T lymphocyte polarization in lung tissue were examined by flow cytometric and Western blot analyses. Related pathways were detected by Western blot assay. Results: Compared with the OVA-induced asthma model group, acupuncture could attenuate airway hyperresponsiveness, inhibit inflammatory cell infiltration and mucus hypersecretion(P0.05 or P0.01). Furthermore, acupuncture increased the expressions of T-bet and Foxp3+, the cell numbers of CD4+interferon gamma(IFN-γ)+ and CD4+ Foxp3+ in lung tissue and the level of Treg type cytokine interleukin(IL)-10 in serum(P0.05 or P0.01). Meanwhile, acupuncture reduced the RAR-related orphan receptor gamma t(RORγt) level, the cell numbers of CD4+ IL-17 A+ as well as the levels of IL-5, IL-13 and IL-17 A in serum(P0.05 or P0.01). In addition, both acupuncture and sham acupuncture could inhibit the phosphorylation of p38 and p44/42(P0.01). Conclusion: Acupuncture could alleviate allergic airway inflammation by strengthening the activities of Th1 and Treg, thus regulating the balance of CD4+ T cell subtypes in experimental asthmatic mice.     

Reversal of Multidrug Resistance and Inhibition of Phosphorylation of AKT in Human Ovarian Cancer Cell Line by Wild-type PTEN Gene

The reversing effect of wild-type PTEN gene on resistance of C13K cells to cisplatin and its inhibitory effect on the phosphorylation of protein kinase B (AKT) were studied. The expression of PTEN mRNA and protein in OV2008 cells and C13K cells were semi-quantitatively detected by using RT-PCR and Western blotting. Recombinant eukaryotic expression plasmid containing human wild-type PTEN gene was transfected into C13K cells by lipofectamine2000. The expression of PTEN mRNA was monitored by RT-PCR and the expression of PTEN, Akt, p-Akt protein were ana- lyzed by Western blotting in PTEN-transfected and non-transfected C13K cells. Proliferation and chemosensitivity of cells to DDP were measured by MTT, and cell apoptosis was detected by flow cytometry after treatment with cisplatin. The expression of PTEN mRNA and protein in OV2008 cells were significantly higher than those in C13K cells. After transfection with PTEN gene for 48 h, the expression of PTEN mRNA and protein in C13K cells were 2.04±0.10, 0.94±0.04 respectively and the expression of p-Akt protein ( 0.94±0.07) was lower than those in control groups (1.68±0.14, 1.66±0.10) (P< 0.05). The IC50 of DDP to C13K cells transfected with PTEN (7.2±0.3 μmol/L) was obviously lower than those of empty-vector transfected cells and non-transfected cells (12.7±0.4 μmol/l, 13.0±0.3 μmol/L) (P<0.05). The apopototis ratio of wild-type PTEN-transfected, empty vector transfected and non-transfected C13K cells were (41.65±0.87)%, (18.61±0.70)% and (15.28 ±0.80)% respectively, and the difference was statistically significant (P<0.05). PTEN gene plays an important role in ovarian cancer multidrug resistance. Transfection of PTEN could increase the ex- pression of PTEN and restore drug sensitivity to cisplatin in human ovarian cancer cell line C13K with multidrug-resistance by decreasing the expression of p-Akt.     

人天然CD4+CD25+调节性T细胞的体外扩增培养及鉴定

目的：建立有效的体外培养扩增人天然CD4+CD25+调节性T细胞(regulatory T cell,Treg)的体系,并检测扩 增细胞的表型及体外免疫抑制功能,为Treg应用于临床免疫治疗提供实验基础。方法：免疫磁珠分离(MACS)方法从 人外周血单个核细胞中分离CD4+CD25+Treg,加入抗CD3/CD28包被磁珠刺激扩增;用台盼蓝染色法测定新鲜分选 的和扩增的Treg的数量和活性,用流式细胞法检测新鲜的和扩增的Treg主要表型标志和纯度,用混合淋巴细胞反应 (mixed lymphocyte reaction,MLR)法检测扩增的Treg对羧基荧光素二醋酸盐琥珀酰亚胺酶(CFSE)标记的自体和异体的 CD4+CD25–T细胞增殖的抑制作用。结果：扩增3周后Treg数目约为新鲜分选细胞数的2 000倍(由5.23×105±1.52×105扩增 至1.02×109±0.20×109),活性>97%。扩增3周后的Treg与新鲜分选细胞保持了相似的表型特征：CD4⁺CD25⁺FoxP3⁺三阳细 胞约占(94.22±2.12)%,与新鲜分选细胞相似。扩增3周后的Treg对自体和异体的CD4+CD25–T细胞的增殖均有明显的抑 制作用,抑制率随着效靶比浓度的增高而增高(P<0.01),而且其各浓度梯度对自体和异体CD4⁺CD25^–T细胞的抑制率 无明显差异(P>0.05)。结论：创建的分离和体外扩增人CD4⁺CD25⁺Treg的方法,可以大量扩增出高纯度且保留其免疫 抑制功能的Treg,解决了Treg数目少的问题,有利于进一步的免疫研究和治疗。     

自体灭活T细胞免疫后诱导Treg下调的机制

目的 探讨自体灭活T细胞免疫注射后诱导体内调节性T细胞（Treg）下调的机制。方法 自体T细胞体外用刀豆蛋白(ConA)刺激活化,照射灭活T细胞给小鼠进行皮下和腹腔免疫（每只小鼠5×106/次）,每隔5 d免疫一次,免疫3次后检测小鼠体内Treg的数量及功能;对照组小鼠皮下注射PBS。ELISA法检测血清中抗鼠CD25抗体。免疫小鼠血清分离后经尾静脉注入未免疫小鼠体内,检测受体小鼠Treg的数量及功能变化。结果 免疫小鼠体内CD4+CD25+Foxp3+ Treg数量较对照组减少（P<0.01）,抑制功能也显著降低（P<0.01）,但血清中抗CD25的抗体增加（P<0.01）。正常小鼠接受免疫小鼠血清后,Treg的数量和抑制功能下调（P<0.01）。结论 采用ConA 活化的自体灭活T细胞免疫,可诱导抗CD25抗体增加,进而减少体内CD4+CD25+Foxp3+ Treg 细胞数量和功能。     

毛细支气管炎CD4+ CD25+调节性T细胞和Foxp3 mRNA表达与激素调控

目的 探讨毛细支气管炎(简称毛支)的发病机制与激素治疗.方法 对呼吸道合胞病毒(RSV)阳性的毛支患儿,根据血清总IgE是否增高以及有无湿疹、皮炎等过敏病史,分为特应体质和非特应体质2组,各50例,另选健康对照组25名.毛支患儿按临床评分分为轻、中、重度(18、62、20例);再随机分成激素组(49例)和非激素组(51例).流式细胞仪检测外周血CD4+ CD25+调节性T细胞(Treg)的比例;反转录(RT)-PCR检测Foxp3 mRNA的表达量.结果 CD4+ CD25+ Treg的数量和Foxp3 mRNA表达量:健康对照组、非特应体质组、特应体质组分别为(10.5±1.6)%和0.34±0.11、(8.8±2.2)%和0.26±0.08、(7.6±1.8)%和0.21±0.09,差异均有统计学意义(均P<0.05);轻、中、重组分别为(9.7±1.6)%和0.28±0.08、(7.8±2.1)%和0.24±0.06、(6.7±1.3)%和0.20±0.07(均P<0.05).CD4+ CD25+ Treg数量、Foxp3 mRNA的表达量与临床评分均呈显著负相关(r=-0.62、-0.71,均P<0.01);激素治疗后两者均升高[(9.5±2.1)%和0.33±0.10分别比(8.5±1.8)%和0.27±0.12,P<0.05和<0.01].结论 CD4+ CD25+ Treg和Foxp3 mRNA与RSV毛支气道炎症关系密切,可反映毛支的病情严重程度.激素可促进CD4+ CD25+ Treg的发育和功能.     

从Th17和CD4+CD25+Foxp3+T细胞功能变化探讨肺结核的耐药机制

目的 分析耐药肺结核患者外周血Th17细胞与CD4+CD25+Foxp3+T细胞比例及细胞因子的变化,从免疫学角度探讨其耐药机制。 方法 分别选取33例耐药肺结核(耐药组)、49例普通肺结核(普通组)及51例健康志愿者(对照组)展开对比研究。检测Th17细胞与CD4+CD25+Foxp3+T细胞比例;采用RT-PCR检测其特异性转录因子RORγt与Foxp3的mRNA表达水平;采用ELISA实验检测IL-17A、IL-17F、TGF-β1及IL-10的血清水平。 结果 普通组Th17细胞比例和RORγt mRNA表达水平低于对照组,耐药组低于普通组;普通组CD4+CD25+Foxp3+T细胞比例和Foxp3 mRNA表达水平高于对照组,耐药组高于普通组;普通组Th17/CD4+CD25+Foxp3+T和RORγt/Foxp3低于对照组,耐药组低于普通组(P＜0.05)。普通组IL-17A、IL-17F水平低于对照组,耐药组低于普通组;普通组TGF-β1、IL-10水平高于对照组,耐药组高于普通组;其组间差异均有统计学意义(P＜0.05)。 结论 Th17/CD4+CD25+Foxp3+T平衡向CD4+CD25+Foxp3+T偏移、免疫系统功能抑制,可能是结核病慢性化和产生耐药的重要机制之一。      

CD137信号下调乳腺癌患者外周血Treg细胞的免疫抑制功能

目的探讨CD137信号对CD4^＋CD25^＋调节性T细胞（Treg）的生物学效应及机制。方法采用激发型抗人CD137单抗加入PHA刺激的乳腺癌患者外周血T细胞培养体系及Treg细胞培养体系中,利用细胞计数及^3H-TdR掺入法分析T细胞的增殖,流式细胞术分析细胞膜分子和Foxp3表达,ELISA分析细胞因子的分泌。结果CD137分子表达于乳腺癌患者外周血CD4^＋CD25^＋Treg细胞膜;抗人CD137单抗加入PHA活化的乳腺癌患者T细胞培养体系后,T细胞增殖明显增加,Foxp3^＋Treg细胞比例明显下降;激发CD137信号可下调CD4^＋CD25^＋Treg细胞的Foxp3表达,抑制Treg细胞产生TGF-β1和IL-10,以及下调Treg细胞对PHA刺激的CD4^＋CD25^-T细胞增殖的抑制效应。结论CD137信号可抑制Treg细胞的免疫抑制功能,CD137可能是对Treg细胞进行免疫干预的重要靶点。     

体外培养扩增CD4+CD25+调节性T细胞的实验观察

目的 观察细胞因子体外培养扩增CD4+CD25+调节性T细胞(Treg)的作用,以便从体外获取大量Treg细胞.方法 将从C57BL/6幼稚小鼠脾脏和淋巴结中提取的Treg与从DBA/2小鼠骨髓中提取的成熟树突细胞(mDC)混合培养,并分别加入白细胞介素-2(IL-2)、IL-4或IL-15,检测Treg增殖和凋亡的情况,与不加入任何细胞因子为对照.分别将培养获得的Treg与C57BL/6幼稚小鼠的效应性T细胞(Teff)混合培养,测定扩增后的Treg对Teff的抑制活性.检测扩增后Treg的Foxp3表达,从而证明培养获得的Treg仍保持其表型.结果 在保持其对Teff抑制活性的同时,IL-2组、IL-4组、IL-15组Treg的增殖细胞前体频率分别为31.3%、28.9%、34.5%,明显高于对照组(14.5%),均P＜0.05;增殖指数分别为1.9、1.7、1.8,明显高于对照组(1.5),均P＜0.05.IL-2组、IL-4组、IL-15组Treg的凋亡细胞比例分别为12.8%、11.4%、12.7%,均明显低于对照组(28.9%),均P＜0.05.扩增后的Treg仍高表达Foxp3(91.75%).结论 IL-4、IL-15和IL-2一样,具有促进Treg增殖、减少其凋亡的作用,并同时保持对Teff的抑制功能.扩增后的Treg仍保持其表型,高表达Foxp3.     

CD4+CD25+、CD4+CD25hig调节性T细胞和Foxp3 mRNA在婴幼儿喘息中的表达及意义

目的探讨婴幼儿喘息CD4+CD25+、CD4+CD25hig调节性T细胞(Treg)和叉头/翼状螺旋转录因子(Foxp3)mRNA的表达及意义。方法采用流式细胞术检测51例首次喘息婴幼儿外周血CD4+CD25+Treg和CD4+CD25hig Treg的比例,RT-PCR检测Foxp3mRNA的表达量,酶联免疫吸附法(ELASA)检测总IgE水平,并与正常婴幼儿对照。结果喘息婴幼儿外周血CD4+CD25+Treg、CD4+CD25higTreg占CD4+T细胞的百分比分别为(6.31+2.96)%和(3.52+1.46)%,均明显低于健康对照组(P<0.01);特应征喘息组CD4+CD25+Treg、CD4+CD25higTreg及Foxp3mRNA表达均低于非特应征喘息组(P<0.05)。喘息患儿CD4+CD25higTreg百分率及Foxp3mRNA表达与血清总IgE之间呈显著负相关(r=-0.75,r=-0.61,P<0.01),而CD4+CD25+Treg百分比与血清总IgE存在正相关(r=0.36,P<0.05)。结论 CD4+CD25+Treg、CD4+CD25hig Treg及Foxp3mRNA在婴幼儿喘息的发病中起重要作用。     

妊娠期高血压疾病妇女外周血调节性T细胞和辅助性T细胞表达分析

目的 分析妊娠期高血压疾病(PIH)妇女外周血调节性T细胞和辅助性T细胞表达变化。方法 连续选择近期住院确诊的PIH 妇女27例(PIH组),入选对象均接受了外周血调节性T细胞(CD+4CD+25 Treg 和CD+4CD+25 Foxp3+Treg)和辅助性T细胞(CD+3、CD+4、CD+8、CD+4/CD+8)检测,并与同期住院正常怀孕产妇 (对照组,20例)相同测试结果进行比较。结果 调节性T细胞数据中,PIH组血清CD+4CD+25 Treg和CD+4CD+25 Foxp3+ Treg水平明显低于对照组(P均<0.05～0.01)。辅助性T细胞中,PIH组血清CD+4/CD+8表达水平明显高于对照组,而CD+8表达水平则显著低于对照组(P均<0.05～0.01)。结论 PIH患者存在明确的外周血调节性T细胞和辅助性T细胞异常表达。     

结核患者外周血CD4＋CD25＋Foxp3＋ Treg表达与巨噬细胞凋亡的临床意义

目的：探讨结核病患者外周血单个核细胞（PBMC）中CD4＋CD25＋ Foxp3＋调节性T淋巴细胞（Treg）表达与单核巨噬细胞（MΦ）凋亡的可能关系及临床意义。方法用流式仪测定29例活动性结核、17例肺外结核患者治疗前及治疗后3、6个月PBMC中CD4＋CD25＋ Foxp3＋ Treg表达及MΦ凋亡率,并与20例健康对照者（健康对照组）进行比较。结果活动性结核患者PBMC中CD4＋CD25＋ Foxp3＋ Treg表达明显高于健康对照组和治疗后患者,且复治患者高于初治患者,肺外结核高于肺结核;患者MΦ凋亡率明显高于健康对照组（P＜0．01）,初治组明显高于复治组（P＜0．01）。活动性结核患者 PBMC中CD4＋ CD25＋Foxp3＋ T reg表达与MΦ凋亡呈负相关。结论 CD4＋ CD25＋ Foxp3＋ T reg表达升高,MΦ凋亡下降,提示与结核病呈慢性感染有关。