目的分析T细胞活化免疫球蛋白抑制V型结构域(V-domain Ig suppressor of T cell activation,VISTA)在幼年特发性关节炎(juvenile idiopathic arthritis,JIA)患儿外周血的表达情况,探讨其在发病中的作用。方法前瞻性收集不同亚型JIA患儿...目的分析T细胞活化免疫球蛋白抑制V型结构域(V-domain Ig suppressor of T cell activation,VISTA)在幼年特发性关节炎(juvenile idiopathic arthritis,JIA)患儿外周血的表达情况,探讨其在发病中的作用。方法前瞻性收集不同亚型JIA患儿(47例)及健康儿童(10例)的外周血,利用流式细胞术检测CD14+单核细胞、CD4+T淋巴细胞、CD8+T淋巴细胞上VISTA、干扰素-γ(interfern-γ,IFN-γ)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的表达情况。结果VISTA在JIA患儿中的表达水平比健康儿童低(P<0.05);不同亚型JIA患儿VISTA表达差异有统计学意义,以全身型表达水平最低(P<0.05);不同免疫细胞表达VISTA差异有统计学意义,单核细胞表面VISTA表达水平更高(P<0.05)。相关性分析发现CD4+T细胞上VISTA与IFN-γ(r=-0.436,P<0.05)、TNF-α(r=-0.382,P<0.05)表达呈负相关,CD8+T细胞上VISTA与IFN-γ(r=-0.348,P<0.05)、TNF-α(r=-0.487,P<0.05)表达呈负相关;CD14+单核细胞上VISTA与IFN-γ(r=-0.582,P<0.05)、TNF-α(r=-0.603,P<0.05)表达呈负相关。结论VISTA表达不足可能与JIA发病相关,增强VISTA的免疫调节作用可能是未来治疗JIA的途径之一。展开更多
目的探讨奥司他韦联合黄芪注射液对手足口病(hand-foot-mouth disease,HFMD)患儿γ干扰素诱导蛋白10(Interferun-γinducible protein-10,IP-10)、免疫球蛋白、T细胞活性调节蛋白(regulated upon activation normal T-cell expressed an...目的探讨奥司他韦联合黄芪注射液对手足口病(hand-foot-mouth disease,HFMD)患儿γ干扰素诱导蛋白10(Interferun-γinducible protein-10,IP-10)、免疫球蛋白、T细胞活性调节蛋白(regulated upon activation normal T-cell expressed and secreted,RANTES)的影响及抗炎作用。方法选取2017年1月—2020年9月医院收治的102例HFMD患儿,随机数字表法分为两组,各51例。对照组给予奥司他韦,观察组给予奥司他韦联合黄芪注射液,比较两组总有效率、退热时间、皮疹消退时间、住院时间、IP-10、RANTES、免疫球蛋白(immunoglobulin,Ig)M、IgA、IgG、血清炎症因子[肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白介素(interleukin,IL)-1、IL-4、IL-12]、不良反应发生情况。结果观察组总有效率为94.12%(48/51),高于对照组的76.47%(39/51)(P<0.05);观察组退热时间、皮疹消退时间、住院时间均短于对照组(P<0.05);治疗后观察组IP-10、RANTES低于对照组(P<0.05);观察组治疗后IgM、IgA、IgG高于对照组(P<0.05);观察组治疗后TNF-α、IL-1、IL-4、IL-12低于对照组(P<0.05);观察组不良反应发生率(0)与对照组[3.92%(2/51)]相比,差异无统计学意义(P>0.05)。结论奥司他韦联合黄芪注射液可改善HFMD患儿免疫功能与炎症反应,促进病情恢复,疗效显著,安全可靠。展开更多
The Fas/FasL system transmits intracellular apoptotic signaling, inducing cell apoptosis. However, Fas signaling also exerts non-apoptotic functions in addition to inducing tumor cell apoptosis. For example, Fas signa...The Fas/FasL system transmits intracellular apoptotic signaling, inducing cell apoptosis. However, Fas signaling also exerts non-apoptotic functions in addition to inducing tumor cell apoptosis. For example, Fas signaling induces lung cancer tumor cells to produce prostaglandin E2 （PGE2） and recruit myeloid-derived suppressor cells （MDSCs）. Activated cytotoxic T lymphocytes （CTLs） induce and express high levels of FasL, but the effects of Fas activation initiated by FasL in CTLs on apoptosis-resistant tumor cells remain largely unclear. We purified activated CD8^＋ T cells from OT-1 mice, evaluated the regulatory effects of Fas activation on tumor cell escape and investigated the relevant mechanisms. We found that CTLs induced tumor cells to secrete PGE2 and increase tumor cell-mediated chemoattraction of MDSCs via Fas signaling, which was favorable to tumor growth. Our results indicate that CTLs may participate in the tumor immune evasion process. To the best of our knowledge, this is a novel mechanism by which CTLs play a role in tumor escape. Our findings implicate a strategy to enhance the antitumor immune response via reduction of negative immune responses to tumors promoted by CTLs through Fas signaling.展开更多
文摘目的探讨奥司他韦联合黄芪注射液对手足口病(hand-foot-mouth disease,HFMD)患儿γ干扰素诱导蛋白10(Interferun-γinducible protein-10,IP-10)、免疫球蛋白、T细胞活性调节蛋白(regulated upon activation normal T-cell expressed and secreted,RANTES)的影响及抗炎作用。方法选取2017年1月—2020年9月医院收治的102例HFMD患儿,随机数字表法分为两组,各51例。对照组给予奥司他韦,观察组给予奥司他韦联合黄芪注射液,比较两组总有效率、退热时间、皮疹消退时间、住院时间、IP-10、RANTES、免疫球蛋白(immunoglobulin,Ig)M、IgA、IgG、血清炎症因子[肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白介素(interleukin,IL)-1、IL-4、IL-12]、不良反应发生情况。结果观察组总有效率为94.12%(48/51),高于对照组的76.47%(39/51)(P<0.05);观察组退热时间、皮疹消退时间、住院时间均短于对照组(P<0.05);治疗后观察组IP-10、RANTES低于对照组(P<0.05);观察组治疗后IgM、IgA、IgG高于对照组(P<0.05);观察组治疗后TNF-α、IL-1、IL-4、IL-12低于对照组(P<0.05);观察组不良反应发生率(0)与对照组[3.92%(2/51)]相比,差异无统计学意义(P>0.05)。结论奥司他韦联合黄芪注射液可改善HFMD患儿免疫功能与炎症反应,促进病情恢复,疗效显著,安全可靠。
基金The work was supported by the Specialized Research Fund for the Chinese National 973 Project （2013CB530502）, the Doctoral Program of Higher Education of China （20110101110105）, the Project of the Chinese National Nature Science Foundation （31370902, 31070795, 31270944）, the Projects in Science and Technology Plan of Zhejiang Province （013C33G2010434） of China, the National Key Science and Technology Specific Proiect of China （2012ZX10002006）, the National High Technology Research and Development Program （2012AA020900）, and the Project of the Chinese National Natural Science Fund Committee for Talent Cultivation （J1103603）.
文摘The Fas/FasL system transmits intracellular apoptotic signaling, inducing cell apoptosis. However, Fas signaling also exerts non-apoptotic functions in addition to inducing tumor cell apoptosis. For example, Fas signaling induces lung cancer tumor cells to produce prostaglandin E2 （PGE2） and recruit myeloid-derived suppressor cells （MDSCs）. Activated cytotoxic T lymphocytes （CTLs） induce and express high levels of FasL, but the effects of Fas activation initiated by FasL in CTLs on apoptosis-resistant tumor cells remain largely unclear. We purified activated CD8^＋ T cells from OT-1 mice, evaluated the regulatory effects of Fas activation on tumor cell escape and investigated the relevant mechanisms. We found that CTLs induced tumor cells to secrete PGE2 and increase tumor cell-mediated chemoattraction of MDSCs via Fas signaling, which was favorable to tumor growth. Our results indicate that CTLs may participate in the tumor immune evasion process. To the best of our knowledge, this is a novel mechanism by which CTLs play a role in tumor escape. Our findings implicate a strategy to enhance the antitumor immune response via reduction of negative immune responses to tumors promoted by CTLs through Fas signaling.
