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。

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.

Effects of estrogen on CD4^+ CD25^+ regulatory T cell in peripheral blood during pregnancy

Objective To investigate the effects of estrogen(E_2)level on regulatory T cells(Treg)in peripheral blood during pregnancy.Methods:A total of 30 healthy non-pregnant women were selected as control group,90 pregnant women of early,middle and late pregnancy and 30 postpartum women at 1 month after parturition were selected as experimental groups including early pregnancy group,middle pregnancy group and late pregnancy group;the proportions of CD4^+CD25^+Treg and CD4^+CD25^+CD127^-Treg among CD4 T cells were detected by flow cytometry;the serum estrogen content in peripheral blood was detected by electrochemical immune luminescence method.Results:E_2 level was coincident with the change of Tregs number during pregnancy.The estrogen content in peripheral blood increased gradually from early pregnancy to late pregnancy,then decreased significantly after parturition,and the level at 1 month after parturition down to the level in non-pregnancy group(P>0.05);the level of E_2 in pregnancy groups were significantly higher than those in non-pregnancy group(P<0.01);and there were significant differences among early pregnancy group,middle pregnancy group and late pregnancy group(P<0.05).The proportions of CD4^+CD25^+Treg and CD4^+CD25^+CD127^-Treg in pregnancy groups were significantly higher than those in non-pregnancy group(P<0.05),but decreased significantly after parturition,and there was no significant difference between non-pregnancy group and postpartum women group(P>0.05):the proportions in middle and late pregnancy groups were significantly higher than those in early pregnancy group(P<0.05).but decreased slightly in late pregnancy group,there was no significant difference between late pregnancy group and middle pregnancy group(P>0.05).There was correlation between Tregs number with estrogen level during pregnancy.The proportion of CD4^+CD25^+Treg and CD4^+CD25^+CD 127^-Treg were positively correlated with estrogen level.Conclusions:High proportion of CD4^+CD25^+Trcg and CD4^+CD25^+CD127^-Treg is closely related to the high level of E,during pregnancy.It suggested that high level of estrogen may induce an increase of CD4^+CD25^+Treg in peripheral blood.and then influence the immune function of pregnant women.The results of this experiment might play an important role of estrogen in immune-modulation during pregnancy.

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.

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.

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.

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.

Effect of CD4^+CD25^+ regulatory T cells in the development of anterior chamber-associated immune deviation

AIM: To investigate whether CD4(+)CD25(+) regulatory T (Treg) cells play a role in the development of anterior chamber-associated immune deviation (ACAID). METHODS: The dynamic changes in the frequency of CD4(+)D25(+) T cells, CD4(+)D25(+) FoxP3(+) T cells and CD4(+)CD25(+) PD-1(+) T cells from spleens of mice with ACAID were analyzed by flow cytometry. Foxp3 mRNA expression in purified CD4(+)CD25(+) T cells was analyzed using real-time PCR. The suppressive effect of purified CD4(+)CD25(+) T cells on the proliferation of CD4(+)CD25(-) T cells was evaluated by [H-3] thymidine incorporation. A blocking experiment was performed to further address the role of CD4(+)CD25(+) T cells in ACAID. The expression of IL-10 in purified CD4(+)CD25(+) T cells was evaluated by ELISA. RESULTS: Increased frequencies of CD4(+)CD25(+) T cells, CD4(+)CD25(+) Foxp3(+) T cells and CD4(+)CD25(+) PD-1(+) T cells were observed in ACAID. The CD4(+)CD25(+) T cells from mice with ACAID showed enhanced suppressive effect on the proliferation of CD4(+)CD25(-) T cells. Treatment of BALB/c mice with anti-CD25 antibody after injection of OVA into the anterior chamber significantly inhibited the induction of ACAID. Furthermore, purified CD4(+)CD25(+) T cells from ACAID mice secreted IL-10. CONCLUSION: Our results demonstrate that Treg cells are induced in the mice undergoing ACAID. These Treg cells may play a role in the development of ACAID.

糖皮质激素对哮喘小鼠CD4^+CD25^+调节性T细胞的作用

目的建立哮喘小鼠动物模型并给予吸入糖皮质激素治疗,通过分析CD4+CD25+调节性T细胞及相关细胞因子在哮喘发病中的变化情况,以及观察糖皮质激素治疗对该细胞的影响和干预作用,探讨哮喘发作的新的免疫机制。方法分别制备哮喘组(OVA),哮喘吸入激素治疗组(OVA/GC)及对照组(NS)动物模型。所有小鼠于末次激发后24 h,取右肺中叶标本作病理切片,观察炎症改变;同时收集外周抗凝血及肺组织细胞悬液,通过流式细胞仪及酶联免疫吸附试验(ELISA)测定CD4+CD25+调节性T细胞占CD4+T细胞的百分比和血浆中IL-10和TGF-β1水平。结果①哮喘小鼠外周血及肺组织细胞悬液中CD4+CD25+调节性T细胞百分率明显降低(P<0.01),吸入糖皮质激素治疗后CD4+CD25+调节性T细胞百分率明显升高(P<0.01)。②IL-10在哮喘组较对照组明显降低(P<0.01),糖皮质激素治疗组IL-10明显升高(P<0.01)。③TGF-β1在哮喘小鼠较对照组明显降低(P<0.01),吸入糖皮质激素治疗后TGF-β1有所升高,但差异无显著性。结论①哮喘小鼠CD4+CD25+调节性T细胞和IL-10,TGF-β1数量和分泌水平降低,尤其是肺部CD4+CD25+调节性T细胞不能有效聚集,导致全身和局部对炎症反应的抑制作用减弱,可能是导致哮喘发生的原因之一。②糖皮质激素可通过增加CD4+CD25+调节性T细胞及IL-10数量和分泌水平,增强其免疫抑制功能而发挥治疗作用。③外周血和肺部CD4+CD25+调节性T细胞百分率变化具有一致性,监测外周血CD4+CD25+调节性T细胞变化情况可以了解肺部变化趋势。

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。

中国健康人外周血中具有CD4^+CD25^(nt/hi)CD127^(lo)特征的调节性T细胞频率

目的:初步确定健康人外周血中具有CD4+CD25nt/hiCD127lo特征的调节性T细胞(Treg)频率,为临床相关疾病的研究及Treg的分选提供参考。方法:采集312名8~60岁(5个年龄组)、不同性别健康人的静脉血,经三重免疫荧光染色,用流式细胞术分析CD4+CD25nt/hiCD127loTreg细胞频率,并观察细胞内Foxp3转录因子的表达。结果:健康人CD4+CD25nt/hiCD127loTreg细胞在外周血中约占CD4+T细胞的(6.55±0.11)%,各年龄组之间有差异(P=0.015),组内性别之间也存在统计学意义(P<0.05);CD25nt/hiCD127lo细胞特异性地表达Foxp3转录因子。结论:初步确定了中国健康人外周血中具有CD4+CD25nt/hiCD127lo表达特征的细胞频率,为Treg细胞的临床研究奠定了基础;CD25nt/hiCD127lo作为CD4+CD25+Treg细胞表面的特征性标志,可在分选时排除其他细胞干扰,获得较完整的Treg细胞。

骨髓间充质干细胞在CD4^+CD25^+调节性T细胞减轻大鼠移植物抗宿主反应中的作用

本研究探讨间充质干细胞(MSC)对GVHD的作用及其机制。建立大鼠同种异体骨髓移植模型,同时输入供者的T淋巴细胞诱导出移植物抗宿主反应,联合或不联合移植供体来源的MSC,观察受鼠的GVHD的发生情况;利用双荧光标记抗体标记受鼠脾脏和胸腺单个淋巴细胞,通过流式细胞术分析CD4+CD25+调节性T细胞亚群比例的变化,分析MSC的作用机制。结果显示实验组的GVHD的发生程度减轻,存活率提高,而CD4/CD8比值在GVHD组出现不同程度的减少,CD4+CD25+调节性T细胞在实验组中的脾淋巴细胞和胸腺淋巴细胞的比例分别为31.55±7.58%、93.20±2.69%,在GVHD组中的比例分别为20.90±1.90%、57.17±6.79%,实验组中CD4+CD25+调节性T细胞比例比GVHD组中增多,具有显著性差异。结论MSC能有效抑制HSC移植后致死性GVHD的发生,提高生存率,同时MSC可能通过作用于体内调节性T淋巴细胞而间接发挥了抑制GVHD的作用。

非霍奇金淋巴瘤患者外周血CD4^+CD25^(high)调节性T细胞研究

本研究分析B细胞非霍奇金淋巴瘤(B-NHL)患者外周血T细胞亚群及CD4+CD25high调节T(Tr)细胞比例及其变化规律,初步探讨B-NHL免疫抑制机制,以及化疗对此免疫抑制功能的影响。采用流式细胞术检测42例初治B-NHL患者、36例化疗后达CR/PR患者及15例正常健康者(对照组)外周血CD3+、CD4+、CD8+和CD4+CD25highT细胞的比例。结果显示:B-NHL患者CD3+及CD4+T细胞比例、CD4/CD8比值均低于正常对照组,它们依次为(68.33±15.27)%,对照(72.06±9.26)%;(34.47±12.84)%,对照(42.45±9.2)%;1.36±0.26,对照1.92±0.20,但CD4+CD25highTr细胞比例明显高于正常对照组,为(4.10±1.21)%,对照(2.04±1.03)%,(P<0.001)。化疗后组CD4/CD8比值低于化疗前组(P<0.05);而外周血CD4+CD25highTr细胞比例,显著高于化疗前组和对照组(P<0.01)。结论:B-NHL初治化疗前及化疗后患者外周血CD4+CD25highTr细胞比例都显著升高,提示CD4+CD25highTr细胞可能是B-NHL患者免疫抑制的重要原因之一。

标本放置时间及年龄对CD4^+CD25^+调节性T细胞的影响

目的探讨标本放置时间及年龄对外周血CD4+CD25+调节性T细胞的影响,明确标本可放置的时间界限,建立不同年龄段的正常参考值范围。方法以171例不同年龄健康人的外周血为标本,采用双色直接荧光素标记法和多参数流式细胞术检测和分析。结果10份标本均分别在室温下放置0、1、2、3、4、5和6h检测时,CD4+CD25+Treg及CD4+CD25highT细胞分别为(12.00±1.12)%、(11.56±1.19)%、(10.72±1.29)%、(10.29±1.57)%、(8.11±1.28)%、(7.97±1.07)%、(7.70±0.93)%及(1.41±0.26)%、(1.45±0.26)%、(1.32±0.26)%、(1.27±0.28)%、(1.09±0.24)%、(0.95±0.18)%、(0.91±0.21)%。4~6岁组(n=34)、7~14岁组(n=24)、20~59岁组(n=95)、60岁以上组(n=18)健康人群CD4+CD25+Treg参考值分别是(6.55±1.28)%、(9.41±2.08)%、(11.67±2.14)%和(9.73±2.79)%,CD4+CD25high分别是(0.92±0.30)%、(1.21±0.45)%、(1.44±0.52)%及(1.51±0.55)%。结论外周血CD4+CD25+Treg和CD4+CD25highT细胞的检测结果随标本放置时间延长呈逐渐降低趋势,因此为真实反映体内CD4+CD25+Treg水平,标本放置时间应限制在3h以内。不同年龄段健康人群外周血中的CD4+CD25+Treg和CD4+CD25highT数值有明显差异,在探讨各种免疫相关性疾病与CD4+CD25+Treg之间的关系时,应该以与其年龄段相匹配的正常参考值为依据。

鼻咽癌组织与外周血CD4^+ CD25^+调节性T细胞检测及临床意义

目的通过检测鼻咽癌患者肿瘤组织及外周血中CD4+T、CD8+T、CD4+CD25-T、CD4+CD25+T细胞的频数,寻找客观、全面评价鼻咽癌患者免疫状态的临床指标。方法采用流式细胞术检测40例初诊鼻咽癌患者及10例正常对照鼻咽部组织和外周血CD4+T、CD8+T、CD4+CD25-T、CD4+CD25+T细胞比例。结果鼻咽癌患者CD4+T细胞比例及CD4+/CD8+T比值均低于对照组(P<0.05),而CD8+T细胞两组间差异无统计学意义(P>0.05),但是CD4+/CD8+T比值在鼻咽癌组织与外周血间差异无统计学意义(P>0.05)。鼻咽癌组织及外周血中CD4+CD25+T细胞比例都高于对照组(P<0.05),同时癌组织中该细胞比例远远高于外周血(P<0.05)。在鼻咽癌组织中CD4+CD25+T细胞与CD8+T细胞、CD4+CD25-T细胞呈负相关(r分别为-0.70、-0.675,P<0.05),而在外周血中没有相关关系(P>0.05)。在不同T(原发肿瘤大小)组间,T4组的鼻咽癌组织中CD4+CD25+T细胞分别高于T1、T2、T3各组(P<0.05),而在T1、T2、T3各组间差异无统计学意义(P>0.05);鼻咽癌中CD4+CD25+T细胞比例与患者有无淋巴结转移并无关系(P>0.05);鼻咽癌组织中Ⅲ+Ⅳ期组CD4+CD25+T细胞比例高于Ⅰ+Ⅱ期组(P<0.05),而在外周血中两组间差异无统计学意义(P>0.05)。结论CD4+CD25+T细胞与鼻咽癌病程进展无相关性,但是联合检测患者肿瘤组织及外周血中CD4+CD25+T细胞的频数并结合既往CD4+/CD8+T比值会全面反应患者免疫状态,为临床治疗提供依据。

人CD4^+CD25^+调节性T细胞系的建立与功能分析

目的 :建立可在体外长期培养的人CD4+CD2 5+调节性T细胞系并研究其免疫生物学特性。方法 :用流式分选的方法从健康人外周血淋巴细胞中得到CD4+CD2 5+T细胞 ,并对其进行体外长期培养、扩增 ;淋巴细胞转化实验分析其免疫抑制功能 ,流式细胞法分析其表型。结果 :经对人CD4+CD2 5+T细胞的长期培养扩增 ,获得具有免疫抑制功能的调节性T细胞系。该T细胞系对经TCR的刺激不敏感 ,且能抑制同一来源或同种异型CD4+CD2 5-T细胞的活化 ,大剂量IL 2可以逆转其抑制功能。长期培养的CD4+CD2 5+T细胞 ,膜表面CD2 5和CTLA 4分子持续高表达 ,而CD4+CD2 5-T细胞CD2 5和CTLA 4分子的表达呈周期性变化。结论 :将CD4+CD2 5+T细胞体外扩增培养成系 ,其功能和表型与同一来源的CD4+CD2

急性冠脉综合征患者外周血中CD4^+ CD25^+调节性T细胞的检测及意义

目的探讨急性冠脉综合征(ACS)患者外周血中CD4+CD25+调节性T细胞(Treg)的异常与疾病的关系。方法28例ACS患者(ACS组)2、6例稳定性心绞痛(SAP)患者(SAP组)和30例正常人(对照组)作为入选对象,均采用流式细胞术检测各组外周血中Treg表达百分比,并检测各组Treg的功能状态,ELISA法检测循环及上清液中细胞因子TNF-α和IL-10浓度,常规检测循环CRP及血脂水平。结果外周血中Treg表达百分比水平及功能ACS组显著低于SAP组(P<0.05)和对照组(P<0.05),CRP、TNF-α的水平ACS组显著高于SAP组(P<0.05)和对照组(P<0.05),ACS组IL-10的水平显著低于SAP组(P<0.05)和对照组(P<0.05)。结论ACS患者外周血中Treg比例减少及功能的降低可能破坏了外周免疫耐受的平衡,参与炎症反应激活致动脉粥样硬化发生发展这一病理过程。