Innate intracellular immune programs mediate our first line of defense against virus infection and are dependent on type I interferon （IFNs） [1]. IFNs are cytokines that are produced and secreted from virus-infected...Innate intracellular immune programs mediate our first line of defense against virus infection and are dependent on type I interferon （IFNs） [1]. IFNs are cytokines that are produced and secreted from virus-infected cells. Autocrine and paracrine engagement by IFNs of the type I IFN receptor initiates tissue-wide and systemic signaling through the cellular Jak-STAT pathway to induce the transcription of hundreds of interferon-stimulated genes （ISGs） （Figure 1A）. ISG products confer a variety of functions, including direct antiviral activity, immunomodulatory function, and metabolic control to limit virus infection and promote the adaptive immune resoonse.展开更多
To investigate the expression of plasmacytoid dendritic cells （pDCs）, interferon regulatory factor-7 （IRF-7） and interferon alpha （IFN- α ） mRNA in skin lesions of patients with psoriasis vulgaris, the expressi...To investigate the expression of plasmacytoid dendritic cells （pDCs）, interferon regulatory factor-7 （IRF-7） and interferon alpha （IFN- α ） mRNA in skin lesions of patients with psoriasis vulgaris, the expressions of plasmacytoid dendritic cells, IRF-7, IFN-α mRNA in the lesional skin of psoriasis vulgaris were detected by immunohistochemical technique （SP） and RT-PCR. Normal skin of healthy volunteers, serving as control, was also tested. The immunohistochemical study showed that the expression of pDCs in the psoriatic lesions was significantly higher than that in the normal controls. RT-PCR showed that the mRNA expression of IRF-7 was much higher than that in normal controls, but no difference in the expression of IFN-α mRNA was found between two groups. Our findings indicate that up-regulated expression of pDCs, IRF-7mRNA might be involved in the pathogenesis of psoriasis.展开更多
[目的]干扰素调节因子(IRFs)-5,IRF-7在抗病毒免疫反应中发挥重要作用,研究黄鳝(Monopterus albus)干扰素调节因子的结构及表达有助于阐明黄鳝抗病毒的机理。[方法]通过PCR法扩增黄鳝IRF-5和IRF-7两个基因c DNA序列,分析其氨基酸序列,...[目的]干扰素调节因子(IRFs)-5,IRF-7在抗病毒免疫反应中发挥重要作用,研究黄鳝(Monopterus albus)干扰素调节因子的结构及表达有助于阐明黄鳝抗病毒的机理。[方法]通过PCR法扩增黄鳝IRF-5和IRF-7两个基因c DNA序列,分析其氨基酸序列,并利用荧光定量PCR技术研究黄鳝不同组织这两个基因的表达。[结果]已扩增到黄鳝IRF5 c DNA序列887bp,编码295aa;IRF7 c DNA序列1 181bp,编码378aa。荧光定量显示:IRF-5在脑中表达量很高,IRF5/β-actin高达120.3×10-2,而在主要免疫器官头肾、尾肾、肠和脾脏中这个比值仅分别为:0.17×10-2、0.11×10-2、0.69×10-2和0.60×10-2。IRF-7在皮肤中表达量很高,IRF7/β-actin比值达68.3×10-2。[结论]IRF-5可能在黄鳝神经系统中发挥重要作用,而IRF-7在黄鳝粘膜免疫中发挥重要作用。展开更多
文摘Innate intracellular immune programs mediate our first line of defense against virus infection and are dependent on type I interferon （IFNs） [1]. IFNs are cytokines that are produced and secreted from virus-infected cells. Autocrine and paracrine engagement by IFNs of the type I IFN receptor initiates tissue-wide and systemic signaling through the cellular Jak-STAT pathway to induce the transcription of hundreds of interferon-stimulated genes （ISGs） （Figure 1A）. ISG products confer a variety of functions, including direct antiviral activity, immunomodulatory function, and metabolic control to limit virus infection and promote the adaptive immune resoonse.
文摘To investigate the expression of plasmacytoid dendritic cells （pDCs）, interferon regulatory factor-7 （IRF-7） and interferon alpha （IFN- α ） mRNA in skin lesions of patients with psoriasis vulgaris, the expressions of plasmacytoid dendritic cells, IRF-7, IFN-α mRNA in the lesional skin of psoriasis vulgaris were detected by immunohistochemical technique （SP） and RT-PCR. Normal skin of healthy volunteers, serving as control, was also tested. The immunohistochemical study showed that the expression of pDCs in the psoriatic lesions was significantly higher than that in the normal controls. RT-PCR showed that the mRNA expression of IRF-7 was much higher than that in normal controls, but no difference in the expression of IFN-α mRNA was found between two groups. Our findings indicate that up-regulated expression of pDCs, IRF-7mRNA might be involved in the pathogenesis of psoriasis.
文摘[目的]干扰素调节因子(IRFs)-5,IRF-7在抗病毒免疫反应中发挥重要作用,研究黄鳝(Monopterus albus)干扰素调节因子的结构及表达有助于阐明黄鳝抗病毒的机理。[方法]通过PCR法扩增黄鳝IRF-5和IRF-7两个基因c DNA序列,分析其氨基酸序列,并利用荧光定量PCR技术研究黄鳝不同组织这两个基因的表达。[结果]已扩增到黄鳝IRF5 c DNA序列887bp,编码295aa;IRF7 c DNA序列1 181bp,编码378aa。荧光定量显示:IRF-5在脑中表达量很高,IRF5/β-actin高达120.3×10-2,而在主要免疫器官头肾、尾肾、肠和脾脏中这个比值仅分别为:0.17×10-2、0.11×10-2、0.69×10-2和0.60×10-2。IRF-7在皮肤中表达量很高,IRF7/β-actin比值达68.3×10-2。[结论]IRF-5可能在黄鳝神经系统中发挥重要作用,而IRF-7在黄鳝粘膜免疫中发挥重要作用。
