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。

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。

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.

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。

Effects of GW5074 in the process of imDCs inducing differentiation of naive CD4^+ T cells into Treg cells in vitro

Objective To establish a stable and efficient method of culturing imDCs in vitro,and to explore the effect of GW5074,which blocks ERK1 /2 signal pathway in the process of immature dentritic cells ( imDCs) on inducing differentiation of the naive allogeneic CD4 + T

An Association between Immunosenescence and CD4^+CD25^+ Regulatory T Cells: A Systematic Review

Objective Age-related increment of the prevalence of CD4^＋CD25^＋ regulatory T （Treg） cells were described controversially, and whether such changes explain immune dysfunction in the elderly is still unclear. The aim of this systematic review is to evaluate the role of the Tregs in immunosenescence. Methods Medline and manual searches were performed to identify all published epidemiological and animal studies investigating the efficacy of the association between immunosenescence and Treg cells. Results It was founded that the frequency, phenotypic characteristics, and number/function of Tregs were altered significantly with aging. Medical conditions in individuals with advanced ageas well as apoptosis intensity of Treg cells had an impact on the accumulation of Tregs which in turn could deteriorate cytotoxic activity of CD8＋ T and NK cells and production of IL-2. The range of immune cells that could be suppressed by Treg cells was quite wide and covered CD4^＋CD25^＋ T cells, NK cells, dendritic cells and even monocytes. These changes were observed both in humans and experimental animals. Besides, it was believed that frequency of Tregs increased with age and was accompanied by intensified suppressive activity for Tregs in patients, for example, with Alzheimer disease （AD） and Parkinson disease （PD）. The impaired condition of CD4＋ T cells, so-called immunosenescence, rendered transplant recipients less responsive to an allogeneic kidney graft, an effect that was limited to transplant recipients who were aged over 60 years. Conclusions Treg cells are associated with immunosenescence. All these changes contribute to the aging-related decline of immune responses and lead to the higher risk of immune-mediated diseases, cancer or infections in aged individuals.

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.

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.

Role of LAP^+CD4^+ T cells in the tumor microenvironment of colorectal cancer

AIM To investigate the abundance and potential functions of LAP^+CD4^+ T cells in colorectal cancer(CRC). METHODS Proportions of LAP^+CD4^+ T cells were examined in peripheral blood and tumor/paratumor tissues of CRC patients and healthy controls using flow cytometry. Expression of phenotypic markers such as forkhead box(Fox)p3, cytotoxic T-lymphocyte-associated protein(CTLA)-4, chemokine CC receptor (CCR)4 and CCR5 was measured using flow cytometry. LAP^-CD4^+ and LAP^+CD4^+ T cells were isolated using a magnetic cellsorting system and cell purity was analyzed by flow cytometry. Real-time quantitative polymerase chain reaction was used to measure expression of cytokines interleukin (IL)-10 and transforming growth factor(TGF)-β.RESULTS The proportion of LAP^+CD4^+ T cells was significantly higher in peripheral blood from patients (9.44% ± 3.18%) than healthy controls (1.49% ± 1.00%, P < 0.001). Among patients, the proportion of LAP^+CD4^+ T cells was significantly higher in tumor tissues(11.76% ± 3.74%) compared with paratumor tissues (3.87% ± 1.64%, P < 0.001). We also observed positive correlations between the proportion of LAP^+CD4^+ T cells and TNM stage(P < 0.001), distant metastasis(P < 0.001) and serum level of carcinoembryonic antigen(P < 0.05). Magnetic-activated cell sorting gave an overall enrichment of LAP^+CD4^+ T cells (95.02% ± 2.87%), which was similar for LAP^-CD4^+ T cells(94.75% ± 2.76%). In contrast to LAP^-CD4^+ T cells, LAP^+CD4^+ T cells showed lower Foxp3 expression but significantly higher levels of CTLA-4, CCR4 and CCR5(P < 0.01). LAP^+CD4^+ T cells expressed significantly larger amounts of IL-10 and TGF-β but lower levels of IL-2, IL-4, IL-17 and interferon-γ, compared with LAPCD4+ T cells.CONCLUSION LAP^+CD4^+ T cells accumulated in the tumor microenvironment of CRC patients and were involved in immune evasion mediated by IL-10 and TGF-β.

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.

慢性丙型病毒性肝炎患者CD4^+CD25^+ Treg细胞与自身抗体的相关性研究

目的探讨慢性丙型病毒性肝炎患者CD4^+CD25^+Treg细胞水平与自身抗体之间的关系及其临床意义。方法选取2013年10月至2015年2月该院收治的324例新入院且未经治疗的慢性丙型病毒性肝炎患者,利用间接免疫荧光和免疫印迹方法检测患者自身抗体谱的表达状况,同时使用流式细胞术计数患者外周血CD4^+CD25^+Treg细胞数量。结果 324例慢性丙型病毒性肝炎患者,有136例患者至少有1项自身抗体阳性,另有188例慢性丙型病毒性肝炎患者自身抗体谱表达均为阴性。自身抗体阳性组CD4^+CD25^+Treg细胞百分比明显低于自身抗体阴性组(P<0.05);同时慢性丙型肝炎患者CD4^+CD25^+Treg细胞水平随着自身抗体表达数的增加而降低,呈负相关。结论对HCV感染患者进行CD4^+CD25^+Treg细胞水平监测,能有效预判患者发生免疫耐受的可能性。

花姜酮对小鼠CD4^+CD25^+Treg细胞分化功能的影响及机制

目的:建立小鼠CD4^+CD25^+Treg细胞的体外诱导及培养方法,同时探讨花姜酮(Zerumbone)对Treg细胞的分化、分泌功能的影响及其机制。方法:从BABL/c小鼠的脾脏分离、纯化CD4^+CD62L^+T细胞,加入转化生长因子(transforming growth factor,TGF)-β(5 ng/mL)、白细胞介素(interleukin,IL)-2(30μg/mL)促进CD4^+CD62L^+T细胞向Treg细胞分化。Treg细胞被分为5组:正常组、模型对照组、Zerumbone(1μmol/L)组、Zerumbone(10μmol/L)组、Zerumbone(30μmol/L)组。流式细胞术检测各组Treg细胞的比例,酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)方法检测IL-10含量,Foxp3、IL-10 mRNA的表达用实时荧光定量聚合酶链反应(RT-PCR)方法检测。结果:本实验方法使Treg细胞的诱导比例明显升高(P<0.01)。与模型对照组相比,Zerumbone组的Treg细胞比例呈剂量依赖性升高(P均<0.05)。IL-10蛋白的表达与模型对照组比较也呈剂量依赖性升高(P均<0.05),Foxp3、IL-10 mRNA的表达同样升高(P<0.05),其中Zerumbone(30μmol/L)组升高最明显(P<0.01)。结论:在体外实验中,Zerumbone可以促进BABL/c小鼠体内的CD4^+CD62L^+T细胞向Treg细胞分化,并促进IL-10蛋白的表达,其机制可能与诱导CD4^+CD25^+Treg特异性转录因子Foxp3的表达有关。

CD4^+CD25^+Treg在急性淋巴细胞白血病患者外周血中的表达及其体外实验研究

目的初步探讨CD4+CD25+调节性T细胞(CD4+CD25+ regulatory T cells,CD4+CD25+Treg)在急性淋巴细胞白血病(acute lymphocytic leukemia,ALL)患者化疗前及化疗缓解后外周血中的表达水平,并研究患者血清能否诱导外周血CD4+CD25-T细胞转化为CD4+CD25+Treg。方法①采用流式细胞术分别检测ALL初诊组、化疗完全缓解或部分缓解组及正常对照组外周血中CD4+CD25+T细胞所占比例,然后通过荧光定量RT-PCR检测各组外周血中转录因子Foxp3mRNA的表达水平,并逐层分析比较。②采集正常人外周血单个核细胞后,对照组用正常人血清,实验组用患者血清并分别设浓度梯度进行培养,72h后采用流式细胞术、荧光定量RT-PCR分别检测CD4+CD25+T细胞和Foxp3mRNA表达。结果ALL化疗缓解组CD4+CD25+T细胞及Foxp3mRNA表达水平均明显高于ALL初诊组和正常对照组(P<0.05),后两者之间CD4+CD25+T细胞水平无统计学差异(P>0.05),但ALL初诊组Foxp3mRNA含量较正常对照组明显升高(P<0.01),差异具有统计学意义;并且血清培养对照组CD4+CD25+T细胞水平及Foxp3mRNA含量均明显低于实验组(P<0.05),且其表达并不随血清浓度的增加而升高。结论CD4+CD25+Foxp3+Treg在ALL初诊组及化疗缓解组患者外周血中比例明显升高,且初步表明患者血清中的可溶性物质可诱导外周血CD4+CD25+T细胞转化为CD4+CD25+Treg,提示CD4+CD25+Treg可能是ALL免疫抑制的一个重要原因。

CD4^(+)CD25^(+)Foxp3^(+)Treg及CD19^(+)CD69^(+)B细胞在狼疮性肾炎患者外周血中的水平变化及其与疾病活动度的关系

目的研究CD4^(+)CD25^(+)Foxp3^(+)Treg、CD19^(+)CD69^(+)B细胞在狼疮性肾炎中的水平变化与及其与病活动度的关系。方法选取我院于2018年10月至2020年10月收治的108例狼疮性肾炎患者作为研究组,根据系统性红斑狼疮的疾病活动指数(SLEDAI)分为轻度活动度组(38例)、中度活动度组(44例)、重度活动度组(26例),另选取同期于我院行肾穿刺活检证实为微小病变患者为对照组(50例)。检测受试者外周血中CD4^(+)CD25^(+)Foxp3^(+)Treg、CD19^(+)CD69^(+)B细胞水平,分析各组间细胞水平差异,采用ROC曲线分析CD4^(+)CD25^(+)Foxp3^(+)Treg、CD19^(+)CD69^(+)B细胞诊断狼疮性肾炎的价值,采用Pearson相关性分析各细胞与疾病活动度间的相关性。结果研究组患者外周血CD19^(+)CD69^(+)B细胞、TNF-α、CA199水平均显著高于对照组(P<0.05),而CD4^(+)CD25^(+)Foxp3^(+)Treg明显低于对照组(P<0.05)。不同严重程度狼疮性肾炎患者外周血CD4^(+)CD25^(+)Foxp3^(+)Treg、CD19^(+)CD69^(+)B细胞、TNF-α、CA199水平差异有统计学意义(P<0.05),其中重度组患者外周血CD19^(+)CD69^(+)B细胞、TNF-α、CA199水平最高。Pearson相关性分析显示,CD4^(+)CD25^(+)Foxp3^(+)Treg、CD19^(+)CD69^(+)B细胞分别与SLEDAI评分呈现负、正相关性,相关系数r分别为-0.458、0.468。采用ROC曲线分析显示,CD19^(+)CD69^(+)B细胞、CD4^(+)CD25^(+)Foxp3^(+)Treg诊断狼疮性肾炎的曲线下面积分别为0.801(95%CI=0.722~0.880)、0.839(95%CI=0.775~0.903)。两者联合诊断的曲线下面积为0.885(95%CI=0.826~0.944),高于单独检测(P<0.05)。结论CD4^(+)CD25^(+)Foxp3^(+)Treg、CD19^(+)CD69^(+)B细胞在狼疮性肾炎患者外周血中处于异常水平状态,且水平与疾病活动度相关,两者联合检测可作为诊断狼疮性肾炎的新指标。

五味温通除痹胶囊联合中药熏蒸对AS患者外周血CD4^+CD25^+CD127^(low/-)Treg表达的影响

目的:观察五味温通除痹胶囊联合中药熏蒸对督寒型强直性脊柱炎(AS)患者的临床疗效及对外周血CD4^+CD25^+CD127^(low/-)Treg表达的影响。方法:将78例督寒型AS患者按随机数字表法分为治疗组和对照组,治疗组给予五味温通除痹胶囊口服并联合中药熏蒸治疗;对照组给予柳氮磺胺吡啶口服,2组疗程均为8周。对2组中医证候评分、总体疗效评价、中医证候疗效评价及CD4^+CD25^+Treg等实验室指标进行观察。结果:治疗组第4、8周有效率明显高于对照组,中医证候显效率及总有效率高于对照组;与对照组比较,治疗组患者治疗后中医证候积分、总体以及腰背痛VAS评分、BASDAI、BASFI功能评分、ASDAS评分均显著降低。结论:五味温通除痹胶囊联合中药熏蒸能显著上调督寒型AS外周血CD4^+CD25^+CD127^(low/-)Treg表达,有效改善AS患者临床症状。

原发性肝癌患者外周血CD4^(+)T、CD8^(+)T、Tc17、Th17和Treg淋巴细胞的变化及其意义

目的了解原发性肝癌(PLC)患者外周血CD4^(+)T、CD8^(+)T、Tc17、Th17和Treg淋巴细胞的变化。方法2018年6月~2019年12月我院诊治的PLC患者83例(巴塞罗那临床肝癌分期A期25例,B期23例,C期18例,D期17例)和健康人35例,采用流式细胞技术检测外周血CD4^(+)T、CD8^(+)T及Tc17(CD8^(+)IL-17)、Th17(CD4^(+)IL-17)和CD4^(+)CD25^(+)CD45RA^(+)Treg淋巴细胞百分比。结果PLC患者外周血CD4^(+)T淋巴细胞百分比为(32.8±8.5)%,显著低于健康人[(43.3±7.4)%,P<0.05],CD4^(+)/CD8^(+)细胞比值为(0.9±0.3),显著低于健康人[(1.2±0.1),P<0.05];PLC患者外周血Treg细胞[(6.4±0.9)%对(3.0±0.1)%]、Th17细胞[(5.0±1.1)%对(3.1±1.5)%]及Tc17细胞[(2.3±0.4)%对(1.0±0.2)%],均较健康人显著升高(P<0.05);BCLC C/D期患者外周血CD4^(+)CD25^(+)CD45RA^(+)Treg细胞百分比较A/B期患者显著升高[(7.6±0.4)%对(5.3±0.5)%,P<0.001],Th17(CD4^(+)IL-17)和Tc17(CD8^(+)IL-17)细胞百分比较A/B期亦显著升高[分别为(6.9±1.1)%对(5.4±0.6)%,P<0.01和(2.8±0.6)%对(1.6±0.4)%,P<0.01]。结论PLC患者外周血淋巴细胞亚群出现异常改变,可能与肿瘤的分期密切相关,为从免疫学角度开展调节T淋巴细胞失衡的免疫治疗提供了理论依据。

外周血CD4^+CD25^+ Treg细胞与HBV携带者相关性的Meta分析

目的:探讨CD4+CD25+Treg细胞在乙型肝炎病毒(hepatitis B virus,HBV)携带者及相关感染状态中分布特征,以期揭示其与HBV携带者的相关性,为临床干预提供依据.方法:计算机检索Pubmed、SCI、Embase、CNKI、万方及维普等数据库,依据NewcastleOttawa Scale(NOS)标准评价文献质量,按照PICOS原则提取资料,采用RevMan5.1软件进行Meta分析.结果:纳入文献24篇.HBV携带者外周血Treg细胞含量较健康对照高(P=0.01);与HBV携带者比较,慢性乙型肝炎Treg细胞含量较高(P=0.12),急性乙型肝炎较低(P=0.15);慢性HBV携带者Treg细胞高于非活动性HBsAg携带者(P=0.01).Treg细胞含量与HBV DNA、丙氨酸转氨酶是否存在相关性,因研究一致性差,结论尚不能确定.结论:CD4+CD25+Treg细胞可能成为影响HBV携带者预后及转归的重要因素.

应用CD4^+CD25^+Treg细胞诱导大鼠肾移植免疫耐受的研究

目的应用供体抗原特异性CD4+CD25+Treg细胞诱导移植免疫耐受,抑制大鼠肾移植慢性排斥反应。方法以SD、Wister大鼠分别为供、受体建立同种异体肾移植慢性排斥反应动物模型;受体脾细胞悬液同供体肾组织抗原孵育培养,诱导获得对供体抗原的特异性;采用MACS法分选具有供体抗原特异性的CD4+ CD25+T细胞,FACS流式细胞法检测分选的CD4+CD25+T细胞及CD4+CD25+Treg细胞纯度;获得之供体抗原特异性CD4+CD25+Treg细胞于同种异体肾移植术后2、4、6、8、10周,分别经尾静脉注射入受者体内(实验组,n=12),选取未注射组为对照(n=12)。观察两组移植肾脏存活时间;术后第10、40、80天MTT法检测比较两组受体脾细胞对供体抗原刺激反应程度;术后第10、20、40、60、80天分别监测各组血肌酐水平。结果FACS流式细胞法检测分选的CD4+CD25+T细胞得率为4.13%,分离纯度为73.34%;CD4+CD25+Treg细胞纯度为65.22%。所分选之CD4+CD25+Treg细胞成功获得供体抗原特异性,对供体抗原的抑制率(IR)为85.4%。移植肾存活时间:治疗组移植肾存活时间为(98.83±6.66)d,显著长于对照组的(78.25±4.71)d,组间差异有统计学意义(P<0.05);术后第40、80天治疗组脾细胞对供体抗原刺激反应程度均明显低于对照组,两组间差异有统计学意义(P<0.05)。术后第20、40、60、80天对照组血肌酐指标明显高于治疗组,同治疗组间差异有统计学意义(P<0.05)。结论供体抗原特异性CD4+CD25+Treg细胞可特异性抑制受体对供体抗原的免疫反应,有效抑制了移植肾慢性排斥反应的发生。

儿童AITP治疗前后CD_4^+CD_(25)^(High)Foxp3^+Treg细胞与Foxp3基因表达的变化

目的探讨CD4+CD25HighFoxp3+Treg细胞在儿童急性特发性血小板减少性紫癜(AITP)发病中的作用及对丙种球蛋白、激素治疗的效应关系。方法流式细胞仪检测AITP患儿治疗前后CD4+CD25HighFoxp3+Treg细胞比例变化,RT-PCR法检测外周血单个核细胞中Foxp3 mRNA的表达。结果单用激素或联用激素和丙种球蛋白治疗后AITP患儿CD4+CD25HighFoxp3+Treg细胞比例和Foxp3基因表达水平较治疗前和正常对照组明显增高(P<0.01),其中联用丙种球蛋白和激素组的增高水平更为明显(P<0.01)。结论CD4+CD25HighFoxp3+Treg细胞比例下降及Foxp3基因表达降低是AITP的发病机制之一,丙种球蛋白和激素可以通过诱导其扩增及活化发挥治疗AITP的作用。

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.