趋化性细胞因子对人Tc1和Tc2细胞内Ca~(2+)浓度变化的影响

为了探讨趋化性细胞因子在体外对人Tc1和Tc2亚群细胞内Ca2 + 浓度变化的影响 ,从PBMC中分离纯化CD8+ T细胞 ,在特定细胞因子及细胞因子抗体作用下 ,体外定向诱导出能长期培养的Tc1和Tc2细胞系 ,用免疫荧光染色结合流式细胞术分析对其进行鉴定后 ,通过流式细胞术检测在趋化性细胞因子刺激前后 ,细胞内Ca2 + 浓度的变化。发现受SDF 1作用后 ,Tc1及Tc2细胞内Ca2 + 浓度变化均不明显 ,而IP 10刺激后 ,Tc1及Tc2细胞内Ca2 + 水平在短时间内明显上调 ,且在Tc1胞内的上升幅度远高于Tc2细胞 ,在MIP 1β刺激后 ,也观察到类似趋势 ;受Eotaxin刺激后 ,Tc1及Tc2细胞内Ca2 + 水平均有微小上升 ,在Tc2细胞内的上升幅度略高于Tc1细胞。说明Tc1和Tc2细胞受趋化性细胞因子作用后 ,细胞内Ca2 + 浓度有不同程度的变化 ,且与趋化性细胞因子受体的表达呈现一定的相关性。     

趋化性细胞因子及其受体和对疾病的免疫干预

趋化性细胞因子是一类重要的免疫调节因子 ,为介绍有关趋化性细胞因子 /趋化性细胞因子受体在抗肿瘤免疫反应和自身免疫性疾病中所起的重要作用 ,以及特异性趋化性细胞因子受体阻断剂的应用研究新进展。趋化性细胞因子与趋化性细胞因子受体的相互作用是IL 12诱导的抗肿瘤T细胞向肿瘤局部浸润的必备因素之一 ,当运用CCR5的特异性阻断剂TAK 779时 ,几乎完全阻断了IL 12的抗肿瘤作用 ;在II型胶原蛋白诱导的小鼠关节炎模型上 ,体内给予CCR5的阻断剂TAK 779后 ,关节炎的发病率明显降低 ,临床症状得到显著改善 ;在动物实验中 ,运用抗CCR5的抗体或CXCR3配体Mig的中和抗体可缓解移植物抗宿主反应 (GVHD) ;此外 ,CCR5和CXCR4在HIV感染宿主细胞时是必需的。所以针对趋化性细胞因子及受体的应用研究将为许多疾病的药物治疗提供新的手段     

趋化性细胞因子及其受体与类风湿性关节炎

趋化性细胞因子主要介导炎症性细胞向损伤处的迁移。类风湿性关节炎 (RA )是以Th1型细胞浸润为主的慢性炎症性疾病 ,在RA的滑膜组织及关节腔滑液中含有大量的趋化性细胞因子 ,趋化性细胞因子受体则在T细胞、单核细胞及中性粒细胞等细胞上高表达。趋化性细胞因子与其受体间的相互作用在RA的致病机制中起着重要的作用。基于此 ,众多抗趋化性细胞因子或抗趋化性细胞因子受体的研究已经开展 ,这也为RA的治疗开辟了新的途径     

趋化性细胞因子及其受体和淋巴细胞的迁移

大多数趋化性细胞因子主要是在炎症病理条件下由单核巨噬细胞、内皮细胞和浸润的淋巴细胞产生 ,现在认为它在免疫应答及其调节、淋巴组织和器官的形成、淋巴细胞的迁移等多种生理和病理过程中发挥重要的作用。本文将讨论趋化性细胞因子及其受体在树突状细胞和淋巴细胞中的分泌和表达以及它们在淋巴细胞迁移、极化效应等过程中的作用。     

肾综合征出血热患者TH1/TH2、Tc1/Tc2亚群比例及有关细胞因子变化的研究

目的：探讨肾综合征血热（HFRS）患者TH1样和TH2样细胞平衡状态以及血清中细胞因子的变化，方法：收集HFRS患者和健康个体血清，采用夹心ELISA方法测定IFN－γ、IL－4和TNF－α的水平，分离PBMC，采用三色流式细胞术分析HFRS患者CD4^ T细胞和CD8^ T细胞中IFN－γ^ 和IL－4^ 细胞的百分率。观察HFRS患者TH1／TH2，Tc1/Tc2比例的变化，比较了不同病程和病情HFRS患者血清中上述指标的变化，结果：HFRS患者血清中TH1类和TH2类细胞因子水平均明显升高，其中IFN－γ和IL－4的平均水平显著高于健康个体（P＝0．016，P＝0．019）。HFRS患者PBMC中TH1、TH2、Tc1,Tc2细胞的平均百分率均高健康个体Tc细胞比例的改变较TH细胞明显，TH1样细胞的比例较TH2样细胞变化明显。发热期患者血清中IFN－γ、IL－4和TNF-α的水平明显升高于恢复期患者，发热期的重症患者的IFN－γ水平升高较轻症明显。结论：HFRS患者血清中IFN－γ和IL－4水平以及PMBMC中TH1、TH2、Tc1和Tc2细胞的比例均有所升高，发热期的患者和重症HFRS患者上述参数变化更明显，表明感染机体总体的免疫平衡偏向TH1类。     

趋化性细胞因子及其受体与凋亡--喜忧参半

最新研究结果表明,趋化性细胞因子及其受体与凋亡之间存在着密切关系。它们可通过不同的途径对凋亡进行调节,即通过死亡受体途径、线粒体途径诱导某些细胞发生凋亡,或通过MAPK途径、PI3K途径、上调PEG10、APRIL等抗凋亡蛋白的表达增强其他一些细胞的抗凋亡活性。这一发现打破了传统的趋化性细胞因子主要介导趋化作用的观念,揭示了趋化性细胞因子及其受体生物学作用的多面性。一方面,趋化性细胞因子可通过这种调节机制促进某些疾病,如白血病的发生发展;另一方面,我们又可通过调控其中的关键分子对某些恶性肿瘤进行治疗,在临床上有广阔的应用前景。文章将集中探讨趋化性细胞因子及其受体与凋亡间关系的最新研究进展。     

Th1/Th2、Tc1/Tc2亚群在乙肝肝硬化患者中的作用

目的 :探讨乙肝肝硬化患者外周血 (PBMC)中CD4 和CD8 T细胞内Th1和Th2类细胞的平衡状态 ,探明Th1、Th2类细胞在乙肝肝硬化中的作用。方法 :乙肝肝硬化患者CD4 T细胞和CD8 T细胞中IFN γ 和IL 4 细胞的百分率 ,观察乙肝肝硬化患者Th1 Th2、Tc1 Tc2比例的变化。结果 :乙肝肝硬化患者PBMC中CD4 ,CD8细胞 ,CD4 CD8比值与健康对照者相比无统计学差异 (P >0 0 5 ) ,Th1细胞及Tc1细胞百分率为 8 8% ,9 0 % ,较健康对照者 7 5 % ,7 7%升高 (P <0 0 5 )。结论 :乙肝肝硬化患者外周血T细胞亚群发生Th1类偏移 ,在乙肝肝硬化的发生和发展中可能起重要作用     

084 趋化性细胞因子及其受体和淋巴细胞的迁移

大多数趋化性细胞因子主要是在炎症病理条件下由单核巨噬细胞、内皮细胞和浸润的淋巴细胞产生，现在认为它在免疫应答及其调节、淋巴组织和器官的形成、淋巴细胞的迁移等多种生理和病理过程中发挥重要的作用。本文将讨论趋化性细胞因子及其受体在树突状细胞和淋巴细胞中的分泌和表达以及它们在淋巴细胞迁移、极化效应等过程中的作用。     

趋化性细胞因子及其受体和淋巴细胞的迁移

大多数趋化性细胞因子主要是在炎症病理条件下由单核巨噬细胞、内皮细胞和浸润的淋巴细胞产生，现在认为它在免疫应答及其调节、淋巴组织和器官的形成、淋巴细胞的迁移等多种生理和病理过程中发挥重要的作用。本文将讨论趋化性细胞因子及其受体在树突状细胞和淋巴细胞中的分泌和表达以及它们在淋巴细胞迁移、极化效应等过程中的作用。     

趋化性细胞因子及其受体对造血调节作用的研究现状

趋化性细胞因子是一类通过受体介导参与体内白细胞迁移、活化和分布，从而调节免疫应答的一类细胞因子。近年来发现趋化性细胞因子与造血调控密切相关。本文着重综述了近几年来国内外对几种与造血调节有关的趋化性细胞因子的研究进展。     

Differential expression of chemokine receptors on human IgA+ and IgG+ B cells

Organ-specific lymphocyte homing is dependent on the expression of tissue-specific homing receptors and selected chemokine receptors. During the effector phase of an immune response, IgA and IgG antibody-secreting cells (ASC) are differently distributed in the body. Still, B cell expression of L-selectin and the mucosal homing receptor integrin alpha4beta7 is not related to the isotype produced, but only to the site of antigen encounter. In this study, we examined if differences in chemokine responsiveness between IgA+ and IgG+ B cells could explain their different tissue localization. Circulating CD19+ B cells were isolated and their expression of IgA, IgG, and selected chemokine receptors was determined by flow cytometry. Few Ig+ cells expressed CCR2, CCR3, or CCR9, and there was no difference in the expression of these receptors between IgA+ and IgG+ cells. In contrast, CCR4, CCR5, and CXCR3 was expressed on significantly more IgG+ than IgA+ cells. The function of chemokine receptors on memory B cells and ASC was then tested in the transwell system. IgG+ memory cells migrated to a higher extent than IgA+ cells towards the CXCR3 ligand CXCL11/I-TAC, while there was only a small migration towards the CCR4 ligand CCL17/TARC and the CCR9 ligand CCL25/TECK. ASC migrated poorly to all chemokines tested. In conclusion, this study shows that IgG+ and IgA+ memory B cells have a differential expression of the Th1 associated chemokine receptor CXCR3, as well as of CCR4 and CCR5. In contrast, none of the studied chemokine receptors was preferentially expressed by IgA+ cells.     

Estrogen decreases expression of chemokine receptors, and suppresses chemokine bioactivity in murine monocytes

Problem:  We propose that the ability of estrogen exposure to increase the probability of a woman developing breast cancer may be related to decreased chemokine activity and suppression of immune surveillance in mammary tissue. The present study was conducted to determine whether estrogen could decrease monocyte bioactivity through alteration of chemokine receptor expression.
Method of study:  We examined the effect of estrogen and tamoxifen on the expression of the chemokine receptors CCR2 and CXCR3 on murine monocytes treated in culture and in vivo . Effects of estrogen on chemokine activation of monocytes were also evaluated.
Results:  Estrogen and tamoxifen significantly decreased expression of CCR2 and, to a lesser extent, CXCR3 on murine monocytes. Estrogen decreased chemotaxis of monocytes towards MCP-1/JE. The chemokines MCP-1/JE and MIP-1 α were unable to evoke increases in intracellular calcium in murine monocytes treated with estrogen, alone or in combination with tamoxifen.
Conclusions:  Our results show that estrogen suppresses the ability of monocytes to respond to certain chemokines, suggesting that estrogen exposure might decrease immune surveillance in tissues where the action of specific chemokines is involved.     

T细胞相关趋化因子及受体的研究进展

T细胞在发育、成熟、活化及发挥生物学效应的各个阶段表达不同的趋化因子受体。T细胞相关趋化因子及其受体的表达在不同的细胞类群上具有时相和分布的差异,并通过趋化因子与其受体特异性结合的模式,参与T细胞的发育过程,调控细胞的定向迁移,从而影响局部甚至整个机体的免疫状态。此外,它还在炎症、感染、肿瘤、自身免疫疾病等众多病理生理的过程中发挥重要作用。在这一领域的深入研究将为相关疾病的预防和治疗提供新的思路和途径。     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.     

尖锐湿疣患者外周血Thl/Th2及Tc1/Tc2亚群的检测及意义

Objective To investigate the role of T-helper (Th) and cytotoxic T (Tc) lymphocyte polarization in the pathogenesis of condyloma acuminatum (CA) and its correlation with recurrence. Methods Three-colour immunofluorescent flow cytometry was used to detect the proportion of CD3+ CD8-/IFN-γ+ (Th1),CD3+CD8-/IL-4+ (Th2), CD3+ CD8+/IFN-γ+ (Tel) and CD3+ CD8+/IL-4+ (Tc2) cells in the peripheral blood of CA patients and health controls. Results Compared to health controls, CA patients showed a decreased number of Thl (P < 0.01) and Tcl cells (P < 0.05), as well as a decreased Th1/Th2 and Tc1/Tc2 ratio (P <0.05). Furthermore, in 15 recurrent CA patients the ratio of Th1/Th2 was remarkably decreased (P < 0.01),while the ratio of Tc1/Tc2 had no significant change in comparison with health controls. Conclusion The decrease of Th1 and Tc1 subsets results in relative Th2 and Tc2 predominance, and this tendency is more significant in recurrent CA patients. The Th1 to Th2 and Te1 to Tc2 shifts in CA patients could be responsible for the fact that human papilloma virus (HPV) is hard to be eliminated.