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.     

CD4+CD25+Foxp3+调节性T细胞在不同月龄小鼠中的变化及与肺癌关系

目的 探讨CD4+CD25+Foxp3+调节性T(Treg)细胞在衰老过程中的变化及与肺癌的关系.方法 建立Lewis肺癌模型,36只C57BL/6小鼠分成6组,青年健康组、中年健康组、老年健康组以及青年肿瘤组、中年肿瘤组、老年肿瘤组.通过流式细胞分析法测定6组小鼠脾脏细胞中CD4+CD25+Foxp3+Treg占CD4+T细胞的百分比来反映CD4+CD25+Foxp3+Treg细胞含量,通过实时荧光定量PCR法测定Foxp3mRNA的含量.结果 与健康组相比,肺肿瘤鼠脾脏中CD4+CD25+Foxp3+/CD4+T细胞和Foxp3 mRNA的含量明显增高(均P＜0.05);在健康组内,各年龄段CD4+CD25+Foxp3+/CD4+T细胞(F=47.70,P=0.000)和Foxp3mRNA(F=6.56,P=0.009)差异有统计学意义,老年鼠脾脏细胞中含有高数量的CD4+CD25+Foxp3+Treg细胞和Foxp3mRNA,最高组是老年肺肿瘤鼠.结论 CD4+CD25+Foxp3+Treg细胞和其功能基因Foxp3含量的改变与增龄和肺肿瘤的发生和发展存在密切的关系.

Abstract：

Objective To explore the change of CD4+CD25+Foxp3+ regulatory T (Treg) cells during aging and the relation with lung tumor. Methods The Lewis lung cancer model was set up in C57BL/6 female mice, and the 36 mice were divided into young health group, middle-aged health group, elderly health group, young tumor group, middle-aged tumor group and elderly tumor group. The percentages of CD4+CD25+Foxp3+ Treg in CD4+ T cells in mice spleen cells were measured by flow cytometry, for reflecting the quantity of CD4+CD25+Foxp3+ Treg cells. And the level of Foxp3 mRNA in splenocyte was tested by real-time PCR method. Results The level of CD4+CD25+Foxp3+/CD4+ T cells and the quantity of Foxp3 mRNA were higher in tumor groups than in healthy groups(both P＜0.05 ). Besides, in the healthy groups, there were statistical differences in the level of CD4+CD25+Foxp3+/CD4+ T cells (F=47.70, P=0.000) and the quantity of Foxp3 mRNA among the different months groups. Accumulation of the CD4+CD25+Foxp3+ Treg cells was accompanied with aging, the elderly mice contained a significantly larger population of CD4+CD25+Foxp3+ Treg cells in their spleen when compared with the younger counterparts, and the highest was the elderly tumor group. So it was with the functional gene Foxp3 mRNA (F=6.56, P=0.009). Conclusions The results suggest a close relationship of the change of CD4+CD25+Foxp3+Treg cells with aging and the genesis and development of lung tumor.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

CD4+CD25-Foxp3+T淋巴细胞的表型鉴定及其在初发系统性红斑狼疮中的意义

Objective To compare the phenotypes of abnormal CD4+CD25-Foxp3+ T cells with traditional regulatory T cells (CD4+CD25+Foxp3+) in patients with untreated new-onset lupus (UNoL) and investigate their clinical relevance. Methods The expressions of surface markers (CD25, CD127, CCR4, GITR, CTLA-4) and intracellular marker(Foxp3) on the peripheral blood mononuclear cells from twenty-two UNoL patients were analyzed by flow cytometry analysis, and their clinical relevance were assessed. Results There were no significant differences between CD4+CD25-Foxp3+ and CD4+CD25+Foxp3- T cells in the expressions of GITR, CTLA--4 and CCR4 (P>0.05), but they were significantly lower than those of CD4+CD25+ Foxp3+ T cells in UNoL patients (P<0.01). The percentages of CD127low- in CD4+Foxp3+CD25high,CD4+Foxp3+ CD25low and CD4+Foxp3+CD25+ T cells were (93.8±3.5 )%, (93.7±2.3)% and (92.0±2.1)% respectively (P> 0.05), whereas the expressions of Foxp3 on CD4+CD127low- T subpopulations showed significant differences in CD4+CDI27low-CD25high (91.4±2.6)%, CD4+CD127low-CD25low (71.9±3.3)% and CD4+CD127low-CD25- (9.0± 2.2)% T cells(P<0.01 ). The frequency of CD+CCR4+CD25high T cells correlated negatively with SLEDAI (r=-0.695,P<0.001).and it was significantly lower in lupus nephritis patients(1.10±0.17)%compared with SLE patients without nephritis [(1.61±0.23)%,P<0.01]and healthy controls [(1.75±0.10)%,P<0.01], furthermore,the frequency of CD4+CCR4+CD25low-T cells in lupus nephritis was significantly higher than that in healthy controls[(11.5±2.3)%vs (8.0±1.0)%,P<0.01].Conclusion The increased CD4+CD25-Foxp3+ T cells in the Untreated Newonset Lupus(UNoL)patients mimic activated T effector cells.CD4+CD25high-CD127low-T cells can be used to isolate live CD4+CD25highFoxp3+regulatory T cells.CCR4+regulatory T cells may be involved in the pathogenesis of lupus nephritis.     

慢性乙型肝炎患者浆样树突状细胞体外诱导CD4+CD25+调节性T细胞的研究

目的 观察慢性乙型肝炎患者,乙型肝炎恢复者和健康人浆样树突状细胞(pDCs)体外诱导CD4+CD25+调节性T细胞(CD4+CD25+Treg)能力的差异,为阐明HBV感染慢性化的机制奠定基础.方法 采用免疫磁珠分离法体外分离46例慢性乙型肝炎患者,10例乙型肝炎恢复者和25名健康人外周血单个核细胞中pDCs,并将其分别与健康人CD4+CD45RA+初始T细胞共培养.采用HBcAg或破伤风毒素对去除CD25+细胞的外周血单个核细胞进行增殖刺激后,使用流式细胞仪及RT-PCR对pDCs-T共培养细胞中CD4+CD25+Treg的数量、表型及FOXP3基因表达情况进行测定;采用酶联免疫吸附法对共培养细胞上清液中的白细胞介素-10和转化生长因子β1进行了进一步检测.两组数据比较采用Mann Whitney U-test.结果 当细胞增殖刺激物为HBcAg时,细胞增殖幅度慢性乙型肝炎患者组为(7999.36±374.74)cpm,乙型肝炎恢复者组为(11 282.56±1174.46)cpm和健康人组为(12 304.58±1462.81)cpm,慢性乙型肝炎患者组细胞增殖幅度明显小于乙型肝炎恢复者组和健康人组,U=0～22.0,P值均<0.05·乙型肝炎恢复者组和健康人组间增殖幅度差异无统计学意义.当增殖刺激物为破伤风毒素时,细胞增殖幅度与阳性对照组之间,差异无统计学意义.CD4+CD25+Treg比例慢性乙型肝炎患者组为5.99%±1.85%,乙型肝炎恢复者组为3.04%±0.79%,健康人组为3.01%±1.53%,慢性乙型肝炎患者组中韵CD4+CD25+Treg比例明显高于乙型肝炎恢复者组和健康人组,U=6.0～71.5,P值均<0.05.3组人群pDCs-T共培养细胞的CD4+CD25+T细胞均检测到Fox p3 RNA,而在CD4+CD25 T细胞中,均未检测到Fox p3RNA.3组人群pDCs-T共培养细胞实验组上清液的白细胞介素-10和转化生长因子β1含量均明显高于阳性对照组.结论 pDCs以诱导CD4+CD25+Treg形式参与了乙型肝炎的慢性化.     

老年脓毒症休克患者CD4+CD25+调节性T细胞的变化及对预后的影响

目的 探讨老年脓毒症休克患者CD4+CD25+调节性T淋巴细胞(CD4+CD25+Treg)的变化及对预后的影响.方法 选择老年脓毒症休克患者75例,采用流式细胞仪检测患者外周血第1、4天和第7～10天CD4+CD25+叉头转录基因P3(FoxP3)/CD4+比例和白细胞DR抗原(HLA-DR)表达.结果 老年脓毒症休克患者平均年龄(69.2±7.5)岁,28 d病死率为53.3%.(1)休克死亡组与生存组CD4+CD25+FoxP3/CD4+比较,第1天(1.76±0.31)对(1.68±0.24)%,第4天(1.94±0.32)%对(1.82±0.28)%,差异均无统计学意义(P＞0.05),第7～10天休克死亡组(2.65±0.28)%,明显高于存活组(1.79±0.27)%,差异有统计学意义(t=11.30,P＜0.01);(2)死亡组第4天和第7～10天HLA-DR表达持续低下,显著低于生存组(t=7.29,t=16.80,均P＜0.01),并分别与CD4+CD25+FoxP3/CD4+比例呈显著负相关(r=-0.39,P＜0.05;r=-0.58,P＜0.01);(3)多元Logistic回归分析显示,脓毒症休克患者第7～10天CD4+CD25+FoxP3/CD4+(OR=3.47,95%CI:1.33～10.0)和HLA-DR(OR=0.27,95%CI:0.14～0.73)是影响其死亡的独立危险因素.结论 老年脓毒症休克患者CD4+CD25+Treg持续上升,提示机体免疫功能抑制,脓毒症休克死亡的危险性增加.     

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.     

老年肿瘤患者外周血CD4+CD25+调节性T细胞的检测及临床意义

目的 探讨老年肿瘤患者CD4+CD25+凋节性T细胞的变化及其与免疫衰老的关系.方法 以64例健康青年人(青年组)、52例健康老年人(老年组)和64例老年肿瘤患者(老年肿瘤组)为研究对象,采用多色荧光素标记和多参数流式细胞术,分别检测外周血中CD4+CD25high、CD4+CD25+FoxP3+和CD4+CD25+CD127low T细胞,分析和比较各组之间的差异及各指标之间的相关性.结果 以外周血中CD4+ T细胞设门,青年组、老年组和老年肿瘤组CD4+CD25high T细胞分别为(1.390±0.4]2)%、(1.729士0.247)%和(2.150±0.769)%,CD4+CD25+FoxP3+细胞分别为(1.180±0.343)%、(2.477士0.400)%和(4.980±2.177)%,CD4+CD25+CD127low T细胞分别为(5.213±0.942)%、(6.186±1.196)%和(7.194±1.538)%.3项指标均为老年肿瘤组最高,青年组最低,差异有统计学意义(P＜0.05);3项指标均呈正相关(P＜O.05).结论 CD4+CD25+调节性T细胞过量累积可能与免疫衰老及老年肿瘤密切相关.     

慢性乙型肝炎患者外周血及肝组织中CD4+CD25+调节性T细胞和乙型肝炎病毒特异性细胞毒性T淋巴细胞的表达及意义

目的 研究CD4+CD25+调节性T细胞和HBV特异性CTL在慢性乙型肝炎患者外周血和肝组织中的表达和临床意义.方法 流式细胞分析技术和流式细胞术细胞因子测定法(CFC)检测157例HBV感染者(包括急性乙型肝炎20例、慢性乙型肝炎115例、乙型肝炎肝硬化22例)和20例健康对照组外周血和部分肝组织中CD4+CD25+调节性T细胞和HBV特异性CTL的表达.组间分析采用t检验.结果急性乙型肝炎,慢性乙型肝炎轻、中、重度患者外周血中CD4+CD25+调节性T细胞分别为(2.87±0.94)%、(3.53±1.56)%、(4.59±2.98)%和(3.65±1.73)%,明显高于对照组的(2.36±0.60)%(t值分别为2.04、5.97、3.30和3.17,P<0.01);慢性乙型肝炎轻、中、重度和乙型肝炎肝硬化患者外周血HBV特异性CTL为(0.189土0.152)%、(0.103±0.110)%、(0.118±0.120)%和(0.098±0.101)%,明显低于急性乙型肝炎患者的(0.815±0.360)%(t值分别为10.09、11.87、9.17和8.96,P<0.01).肝组织中CD4+CD25+调节性T细胞和HBV特异性CTL的表达高于外周血.结论 CD4+CD25+调节性T细胞可能通过抑制CD8+T淋巴细胞在机体抗病毒过程中发挥重要作用.     

M受体拮抗剂对提高慢性阻塞性肺疾病患者调节性T细胞表达的影响

目的 观察COPD稳定期患者体内是否存在CD_8~+CD_(25)~+Foxp_3~+调节性T细胞(Treg细胞),以及M受体拈抗剂噻托溴铵对其表达的影响.方法 2007年10月至2008年3月,选择23例COPD稳定期患者,每日1次吸入噻托溴铵18 μg,连续治疗3个月.分别在治疗前后榆查患者的肺功能和检测外周血中T细胞亚群的数量.两组间均数比较采用配对t检验,相关分析采用直线相关分析.结果 COPD稳定期患者在吸入噻托溴铵治疗后,外周血巾CD_4~+为(36±46)%,CD_8~+CD_(25)~+Treg 细胞为(21±21)%,明显高于治疗前的(28±10)%和(8±8)%;CD_4~+CD_(25)~+为(4±3)%,明显低于治疗前的(10±7)%,差异均有统计学意义(t值为2.72～3.78,P<0.01和P<0.05).CD_8~+、CD_8~+CD_(25)~+和CD_4~+CD_(25)~+Treg细胞均有表达,但治疗前后无明显变化.治疗后肺通气功能得到明显改善,FEV_1、FEV_1占预计值%和FEV_1/FVC分别由(1.0±0.3)L、(35±10)%和(41±8)%提高到(1.1±0.3)L、(40±11)%和(45±11)%,差异均有统计学意义(t值为2.37～2.65,均P相似文献   

CD25+ regulatory T cells isolated from HIV-infected individuals suppress the cytolytic and nonlytic antiviral activity of HIV-specific CD8+ T cells in vitro

HIV infection is characterized by CD4(+) T cell depletion and progressive immune dysfunction; particularly impacted are HIV-specific T cell responses. An important component of immune-mediated control of HIV replication, killing of infected cells, appears to be impaired, in part due to poor cytolytic activity of HIV-specific cytotoxic T cells (CTL). In vitro, several functions of HIV-specific T cells, such as cytokine production, can be enhanced by the depletion of the immunosuppressive CD25(+) FoxP3(+) CD4(+) regulatory (Treg) cell subset. However, the effect of CD25(+) Treg cells on virus-specific cytolytic activity in the context of HIV or any human viral infection has not been investigated. The present study demonstrates that CD25(+) Treg cells isolated from the peripheral blood of HIV-infected subjects significantly suppress HIV Gag-specific cytolytic activity in vitro. In addition, CD25(+) Treg cells suppress effector function (coexpression of TNF-alpha and IFN-gamma) of HIV-specific CD8(+) T cells that proliferate in response to HIV antigen. Finally, the secretion of HIV-inhibitory CC-chemokines by HIV-specific and nonspecific CD8(+) T cells is significantly reduced in the presence of CD25(+) Treg cells. These data suggest that CD25(+) Treg-mediated suppression of the antiviral activity of HIV-specific CD8(+) T cells could impact the ability of HIV-infected individuals to control HIV replication in vivo.     

系统性红斑狼疮患者外周血Th17细胞与调节性T细胞的变化

目的 探讨外周血辅助性T细胞17(Th17)与调节性T细胞在系统性红斑狼疮(SLE)发生、发展中的变化.方法 选取32例SLE活动期患者作为SLE活动组、30例SLE稳定期患者作为SLE稳定组及25名健康者作为对照组,采用流式细胞术及定量聚合酶链反应(PCR)的方法,分别从蛋白质水平与mRNA水平检测其外周血CD4+T细胞IL-17及FoxP3的表达.采用单因素方差分析进行统计学处理.结果 SLE活动组外周血CD4+T细胞IL-17蛋白质(1.01±0.22)％及mRNA(2.04±0.63)表达水平显著高于SLE稳定组(0.48±0.16)％、(1.12±0.34)及健康对照组(0.41±0.12)％、1(P＜0.01),但SLE稳定组与健康者对照组差异无统计学意义(P＞0.05).SLE活动组外周血CD4+T细胞FoxP3蛋白质(2.36±0.54)％及mRNA(0.42±0.16)表达水平显著低于SLE稳定组(4.34±0.95)％、(0.87±0.28)及健康对照组(5.09±1.17)％、 1(P＜0.01),SLE稳定组又低于健康对照组(P＜0.05).结论 SLE患者外周血中可能存在Th17/调节性T细胞的失衡,且失衡程度可能与病情活动性相关.     

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.