FTY720, a sphingosine 1-phosphate receptor modulator, induces a marked decrease in the number of peripheral blood lymphocytes and exerts immunomodulating activity in various experimental allograft and autoimmune disea...FTY720, a sphingosine 1-phosphate receptor modulator, induces a marked decrease in the number of peripheral blood lymphocytes and exerts immunomodulating activity in various experimental allograft and autoimmune disease models. In this study, we evaluated the effect of FTY720 and its active metabolite, （S）-enantiomer of FTY720-phosphate [（S）-FTY720-P] on experimental autoimmune encephalomyelitis （EAE） in rats and mice. Prophylactic administration of FTY720 at 0.1 to 1 mg/kg almost completely prevented the development of EAE, and therapeutic treatment with FTY720 significantly inhibited the progression of EAE and EAE-associated histological change in the spinal cords of LEW rats induced by immunization with myelin basic protein. Consistent with rat EAE, the development of proteolipid protein-induced EAE in SJL/J mice was almost completely prevented and infiltration of CD4^＋ T cells into spinal cord was decreased by prophylactic treatment with FTY720 and （S）-FTY720-P. When FTY720 or （S）-FTY720-P was given after establishment of EAE in SJL/J mice, the relapse of EAE was markedly inhibited as compared with interferon-β, and the area of demyelination and the infiltration of CD4^＋ T cells were decreased in spinal cords of EAE mice. Similar therapeutic effect by FTY720 was obtained in myelin oligodendrocyte glycoprotein-induced EAE in C57BL/6 mice. These results indicate that FTY720 exhibits not only a prophylactic but also a therapeutic effect on EAE in rats and mice, and that the effect of FTY720 on EAE appears to be due to a reduction of the infiltration of myelin antigen-specific CD4^＋ T cells into the inflammation site. Cellular ＆ Molecular Immunology. 2005;2（6）：439-448.展开更多
活化T细胞核因子(nuclear factor of activated Tcell,NFAT)作为细胞信号转导中的一类重要因子,不仅在免疫系统中发挥功能,在肿瘤发生、发展中也起着关键性作用。NFAT的活化主要通过钙离子信号启动,进而发生核转位并与DNA结合,通过与其...活化T细胞核因子(nuclear factor of activated Tcell,NFAT)作为细胞信号转导中的一类重要因子,不仅在免疫系统中发挥功能,在肿瘤发生、发展中也起着关键性作用。NFAT的活化主要通过钙离子信号启动,进而发生核转位并与DNA结合,通过与其他共转录因子的相互协同,调节目的基因的表达。不同亚型的NFAT在肿瘤细胞转化和生长中发挥不同的调控作用,并促进肿瘤血管生成和肿瘤细胞的浸润或迁移。进一步了解NFAT在肿瘤中的表达和作用机制,探究其在肿瘤发生、发展中的作用,可为肿瘤临床治疗中有效靶点的寻找带来更多新的突破。展开更多
文摘FTY720, a sphingosine 1-phosphate receptor modulator, induces a marked decrease in the number of peripheral blood lymphocytes and exerts immunomodulating activity in various experimental allograft and autoimmune disease models. In this study, we evaluated the effect of FTY720 and its active metabolite, （S）-enantiomer of FTY720-phosphate [（S）-FTY720-P] on experimental autoimmune encephalomyelitis （EAE） in rats and mice. Prophylactic administration of FTY720 at 0.1 to 1 mg/kg almost completely prevented the development of EAE, and therapeutic treatment with FTY720 significantly inhibited the progression of EAE and EAE-associated histological change in the spinal cords of LEW rats induced by immunization with myelin basic protein. Consistent with rat EAE, the development of proteolipid protein-induced EAE in SJL/J mice was almost completely prevented and infiltration of CD4^＋ T cells into spinal cord was decreased by prophylactic treatment with FTY720 and （S）-FTY720-P. When FTY720 or （S）-FTY720-P was given after establishment of EAE in SJL/J mice, the relapse of EAE was markedly inhibited as compared with interferon-β, and the area of demyelination and the infiltration of CD4^＋ T cells were decreased in spinal cords of EAE mice. Similar therapeutic effect by FTY720 was obtained in myelin oligodendrocyte glycoprotein-induced EAE in C57BL/6 mice. These results indicate that FTY720 exhibits not only a prophylactic but also a therapeutic effect on EAE in rats and mice, and that the effect of FTY720 on EAE appears to be due to a reduction of the infiltration of myelin antigen-specific CD4^＋ T cells into the inflammation site. Cellular ＆ Molecular Immunology. 2005;2（6）：439-448.
文摘目的 研究T细胞免疫球蛋白黏蛋白3(TIM-3)及乳腺癌易感基因相关蛋白1(BAP1)、泛素特异性蛋白酶39(USP39)与早期胃癌免疫浸润的关系。方法 选取2019年4月至2021年12月于我院行内镜下黏膜剥离术(ESD)治疗的87例早期胃癌患者,收集其术后病理组织及其癌旁组织;采用免疫组织化学法检测组织TIM-3、BAP1、USP39及CD3^(+)、CD4^(+)、CD8^(+)、CD68^(+)阳性表达,实时荧光定量PCR法检测其mRNA表达;采用Spearman法分析相关性;并比较TIM-3、BAP1、USP39阳性表达的病理参数,随访统计阴阳性表达者生存时间,COX回归分析影响预后的危险因素。结果 TIM-3、BAP1、USP39在胃癌组织中阳性表达率高于癌旁组织(P<0.05)。胃癌组织TIM-3 m RNA、BAP1 m RNA、USP39 mRNA表达量高于癌旁组织(P<0.05)。胃癌组织中CD3^(+)、CD4^(+)阳性率高于癌旁组织,CD8^(+)、CD68^(+)阳性表达率低于癌旁组织(P<0.05)。TIM-3、BAP1、USP39阳性表达在年龄、性别方面,无统计学意义(P>0.05);在分化程度、淋巴结转移方面,具有统计学意义(P<0.05)。经Spearman分析显示,TIM-3、BAP1、USP39表达与CD3^(+)、CD4^(+)浸润量呈正相关(P<0.05),与CD8^(+)、CD68^(+)浸润量呈负相关(P<0.05)。术后随访1年,TIM-3、BAP1、USP39阳性表达者生存率分别为75.68%(56/74)、73.33%(44/60)、71.43%(40/56),阴性表达者分别为100.00%(13/13)、92.59%(25/27)、93.55%(29/31);阴阳性表达患者生存率差异有统计学意义(P<0.05)。经COX多因素分析显示,分化程度对胃癌预后无显著影响(P>0.05),淋巴结转移、TIM-3、BAP1、USP39阳性表达为影响预后的危险因素(P<0.05)。结论 TIM-3、BAP1、USP39在胃癌组织中阳性表达率高,其表达与组织免疫浸润有关,且TIM-3、BAP1、USP39阳性表达者预后差。
文摘活化T细胞核因子(nuclear factor of activated Tcell,NFAT)作为细胞信号转导中的一类重要因子,不仅在免疫系统中发挥功能,在肿瘤发生、发展中也起着关键性作用。NFAT的活化主要通过钙离子信号启动,进而发生核转位并与DNA结合,通过与其他共转录因子的相互协同,调节目的基因的表达。不同亚型的NFAT在肿瘤细胞转化和生长中发挥不同的调控作用,并促进肿瘤血管生成和肿瘤细胞的浸润或迁移。进一步了解NFAT在肿瘤中的表达和作用机制,探究其在肿瘤发生、发展中的作用,可为肿瘤临床治疗中有效靶点的寻找带来更多新的突破。
