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 role...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.展开更多
Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistoc...Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistochemistry and real-time reverse trancription polymerase chain reaction (real-time RT-PCR) techniques to determine Foxp3+ Treg counts and the expression levels of Foxp3 mRNA and TSLP mRNA in thymomas of 23 MG patients and thymuses of 4 healthy controls. Results: The CD4+ Foxp3+ nTreg (natural regulatory T cells) counts in thymomas were significantly lower than those in normal thymuses (P<0.01), and the expression levels of Foxp3 mRNA and TSLP mRNA were also lower in thymomas(P<0.01). Among the thymoma types, type B1 thymoma had the highest Foxp3+ nTreg count and standard values of Foxp3 mRNA and TSLP mRNA. There was a strong positive correlation between the mRNA transcriptional levels of Foxp3 and TSLP. Conclusion: The insufficient expression of Foxp3 in thymoma, which may be caused by decreased transcription of TSLP, may result in the reduction of Tregs and cause autoimmune disorders.展开更多
Immunotherapy may be used for the treatment of glioblastoma multiforme; however, the induced immune response is inadequate when either T cells or dendritic cells are used alone. In this study we established a novel va...Immunotherapy may be used for the treatment of glioblastoma multiforme; however, the induced immune response is inadequate when either T cells or dendritic cells are used alone. In this study we established a novel vaccine procedure in rats, using dendritic cells pulsed with C6 tumor cell lysates in combination with adoptive transfer of T lymphocytes from syngenic donors. On day 21 after tumor inoculation, all the rats were sacrificed, the brains were harvested for calculation of glioma volume, cytolytic T lymphocyte responses were measured by cytotoxic assay, and the frequency of regulatory T lymphocytes （CD4＋CD25~FOXP3~） in the peripheral blood was investigated by flow cytometric analysis. The survival rate of rats bearing C6 glioma was observed. Results showed that the co-immunization strategy had significant anti-tumor potential against the pre-established C6 glioma, and induced a strong cytolytic T lymphocyte response in rats. The frequency of peripheral blood CD4＊CD25＊FOXP3＊ regulatory T lymphocytes was significantly decreased following the combination therapy, and the rats survived for a longer period. Experimental findings indicate that the combined immunotherapy of glioma cell lysate-pulsed dendritic cell vaccination following adoptive transfer of T cells can effectively inhibit the growth of gliomas in rats, boost anti-tumor immunity and produce a sustained immune response while avoiding the accumulation of CD4＋CD25＋FOXP3＋ regulatory r lymphocytes.展开更多
目的检测哮喘小鼠与对照小鼠肺组织中Th1、Th2、Th17及Foxp3+Treg细胞占CD4+T细胞百分比,探讨哮喘小鼠中Foxp3+Treg/Th17比值变化及其在哮喘中的意义。方法将6周清洁级Balb/c小鼠随机分为对照组(control)和哮喘组(OVA),哮喘组给予OVA致...目的检测哮喘小鼠与对照小鼠肺组织中Th1、Th2、Th17及Foxp3+Treg细胞占CD4+T细胞百分比,探讨哮喘小鼠中Foxp3+Treg/Th17比值变化及其在哮喘中的意义。方法将6周清洁级Balb/c小鼠随机分为对照组(control)和哮喘组(OVA),哮喘组给予OVA致敏和激发,建立哮喘小鼠模型,对照组用PBS代替OVA。最后1次激发后24 h内检测支气管肺泡灌洗液(BALF)中细胞总数及细胞分类计数;HE染色制作肺组织病理切片,光镜下观察病理变化;小鼠肺功能仪检测小鼠气道高反应性;流式细胞术检测小鼠肺组织中Th1、Th2、Th17、Foxp3+Treg细胞占CD4+T细胞百分比。结果哮喘组BALF细胞总数、淋巴细胞、嗜酸性粒细胞及中性粒细胞比例显著高于对照组,肺部炎症反应与气道高反应显著高于对照组。哮喘组小鼠肺组织中Th2、Th17细胞百分比明显高于对照组[分别为(0.83±0.08)%vs(0.50±0.03)%;(1.74±0.17)%vs(1.07±0.07)%,P<0.01];而Th1、Foxp3+Treg细胞百分比显著低于对照组[分别为(1.39±0.14)%vs(2.56±0.18)%;(4.87±0.35)%vs(7.67±0.44)%,P<0.001];哮喘组Th1/Th2及Foxp3+Treg/Th17明显低于对照组(分别为1.66±0.17 vs 5.19±0.56;3.02±0.49 vs 7.38±0.71,P<0.001)。结论除Th1/Th2失衡外,Foxp3+Treg/Th17失衡在哮喘发病中亦有重要作用。展开更多
基金This project was supported by a program of Science Project of Hubei Province (No.2003AA301C10).
文摘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.
文摘Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistochemistry and real-time reverse trancription polymerase chain reaction (real-time RT-PCR) techniques to determine Foxp3+ Treg counts and the expression levels of Foxp3 mRNA and TSLP mRNA in thymomas of 23 MG patients and thymuses of 4 healthy controls. Results: The CD4+ Foxp3+ nTreg (natural regulatory T cells) counts in thymomas were significantly lower than those in normal thymuses (P<0.01), and the expression levels of Foxp3 mRNA and TSLP mRNA were also lower in thymomas(P<0.01). Among the thymoma types, type B1 thymoma had the highest Foxp3+ nTreg count and standard values of Foxp3 mRNA and TSLP mRNA. There was a strong positive correlation between the mRNA transcriptional levels of Foxp3 and TSLP. Conclusion: The insufficient expression of Foxp3 in thymoma, which may be caused by decreased transcription of TSLP, may result in the reduction of Tregs and cause autoimmune disorders.
基金supported by the grant from the National Natural Science Foundation of China,No.30872647
文摘Immunotherapy may be used for the treatment of glioblastoma multiforme; however, the induced immune response is inadequate when either T cells or dendritic cells are used alone. In this study we established a novel vaccine procedure in rats, using dendritic cells pulsed with C6 tumor cell lysates in combination with adoptive transfer of T lymphocytes from syngenic donors. On day 21 after tumor inoculation, all the rats were sacrificed, the brains were harvested for calculation of glioma volume, cytolytic T lymphocyte responses were measured by cytotoxic assay, and the frequency of regulatory T lymphocytes （CD4＋CD25~FOXP3~） in the peripheral blood was investigated by flow cytometric analysis. The survival rate of rats bearing C6 glioma was observed. Results showed that the co-immunization strategy had significant anti-tumor potential against the pre-established C6 glioma, and induced a strong cytolytic T lymphocyte response in rats. The frequency of peripheral blood CD4＊CD25＊FOXP3＊ regulatory T lymphocytes was significantly decreased following the combination therapy, and the rats survived for a longer period. Experimental findings indicate that the combined immunotherapy of glioma cell lysate-pulsed dendritic cell vaccination following adoptive transfer of T cells can effectively inhibit the growth of gliomas in rats, boost anti-tumor immunity and produce a sustained immune response while avoiding the accumulation of CD4＋CD25＋FOXP3＋ regulatory r lymphocytes.
文摘目的检测哮喘小鼠与对照小鼠肺组织中Th1、Th2、Th17及Foxp3+Treg细胞占CD4+T细胞百分比,探讨哮喘小鼠中Foxp3+Treg/Th17比值变化及其在哮喘中的意义。方法将6周清洁级Balb/c小鼠随机分为对照组(control)和哮喘组(OVA),哮喘组给予OVA致敏和激发,建立哮喘小鼠模型,对照组用PBS代替OVA。最后1次激发后24 h内检测支气管肺泡灌洗液(BALF)中细胞总数及细胞分类计数;HE染色制作肺组织病理切片,光镜下观察病理变化;小鼠肺功能仪检测小鼠气道高反应性;流式细胞术检测小鼠肺组织中Th1、Th2、Th17、Foxp3+Treg细胞占CD4+T细胞百分比。结果哮喘组BALF细胞总数、淋巴细胞、嗜酸性粒细胞及中性粒细胞比例显著高于对照组,肺部炎症反应与气道高反应显著高于对照组。哮喘组小鼠肺组织中Th2、Th17细胞百分比明显高于对照组[分别为(0.83±0.08)%vs(0.50±0.03)%;(1.74±0.17)%vs(1.07±0.07)%,P<0.01];而Th1、Foxp3+Treg细胞百分比显著低于对照组[分别为(1.39±0.14)%vs(2.56±0.18)%;(4.87±0.35)%vs(7.67±0.44)%,P<0.001];哮喘组Th1/Th2及Foxp3+Treg/Th17明显低于对照组(分别为1.66±0.17 vs 5.19±0.56;3.02±0.49 vs 7.38±0.71,P<0.001)。结论除Th1/Th2失衡外,Foxp3+Treg/Th17失衡在哮喘发病中亦有重要作用。
