自然杀伤T细胞(natural killer T cells,NKT细胞)属于T淋巴细胞,能特异性识别抗原递呈细胞表面主要组织相容性复合体I类样分子CD1d递呈的糖脂类抗原。活化的NKT细胞能发挥抗病毒感染和抗肿瘤等作用,参与机体重要的免疫反应。本文对NKT...自然杀伤T细胞(natural killer T cells,NKT细胞)属于T淋巴细胞,能特异性识别抗原递呈细胞表面主要组织相容性复合体I类样分子CD1d递呈的糖脂类抗原。活化的NKT细胞能发挥抗病毒感染和抗肿瘤等作用,参与机体重要的免疫反应。本文对NKT细胞抗病毒作用的相关进展进行综述,同时分析NKT细胞参与肝损伤等慢性病毒感染的发病进程。展开更多
Bone marrow precursor cells were extracted from C57BL/6J mice aged 7-8 weeks, and dendritic cells were purified using anti-CD1 lc （a specific marker for dendritic cells） antibody-coated magnetic beads. Immunofluores...Bone marrow precursor cells were extracted from C57BL/6J mice aged 7-8 weeks, and dendritic cells were purified using anti-CD1 lc （a specific marker for dendritic cells） antibody-coated magnetic beads. Immunofluorescence staining revealed that the expression levels of endomorphin-1 and endomorphin-2 were upregulated in dendritic cells activated by lipopolysaccharide. An enzyme Jmmunoassay showed that lipopolysaccharide and other Toll-like receptor ligands promoted the secretion of endomorphin-1 and endomorphin-2 from activated dendritic cells. [3H]-thymidine incorporation demonstrated that endomorphin-1 and endomorphin-2 both inhibited the proliferation of T lymphocyte induced by activated dendritic cells. Furthermore, this immunosuppressive effect was blocked by CTOP, a specific antagonist of IJ-opioid receptors. Our experimental findings indicate that activated dendritic cells can induce the expression and secretion of endomorphins, and that endomorphins suppress T lymphocyte proliferation through activation of iJ-opioid receptors.展开更多
Whitman had a lifelong attachment to the grammatical form of the present participles and the poetic "I". In this thesis, I proposed that these devices constitute an essential part of his poetics and that the...Whitman had a lifelong attachment to the grammatical form of the present participles and the poetic "I". In this thesis, I proposed that these devices constitute an essential part of his poetics and that they reflect and express some of this poet’s most fundamental ideas and beliefs about life and poetry. Here I used I HEAR AMERICAN SINGING, as illustration, in the hope that some of the conclusions I made here would help us to understand his other poems better.展开更多
文摘自然杀伤T细胞(natural killer T cells,NKT细胞)属于T淋巴细胞,能特异性识别抗原递呈细胞表面主要组织相容性复合体I类样分子CD1d递呈的糖脂类抗原。活化的NKT细胞能发挥抗病毒感染和抗肿瘤等作用,参与机体重要的免疫反应。本文对NKT细胞抗病毒作用的相关进展进行综述,同时分析NKT细胞参与肝损伤等慢性病毒感染的发病进程。
基金supported by the Natural Science Research Foundation of Anhui Province Universities,No.KJ2011A202the National Natural Science Foundation of China,No.81000074
文摘Bone marrow precursor cells were extracted from C57BL/6J mice aged 7-8 weeks, and dendritic cells were purified using anti-CD1 lc （a specific marker for dendritic cells） antibody-coated magnetic beads. Immunofluorescence staining revealed that the expression levels of endomorphin-1 and endomorphin-2 were upregulated in dendritic cells activated by lipopolysaccharide. An enzyme Jmmunoassay showed that lipopolysaccharide and other Toll-like receptor ligands promoted the secretion of endomorphin-1 and endomorphin-2 from activated dendritic cells. [3H]-thymidine incorporation demonstrated that endomorphin-1 and endomorphin-2 both inhibited the proliferation of T lymphocyte induced by activated dendritic cells. Furthermore, this immunosuppressive effect was blocked by CTOP, a specific antagonist of IJ-opioid receptors. Our experimental findings indicate that activated dendritic cells can induce the expression and secretion of endomorphins, and that endomorphins suppress T lymphocyte proliferation through activation of iJ-opioid receptors.
文摘Whitman had a lifelong attachment to the grammatical form of the present participles and the poetic "I". In this thesis, I proposed that these devices constitute an essential part of his poetics and that they reflect and express some of this poet’s most fundamental ideas and beliefs about life and poetry. Here I used I HEAR AMERICAN SINGING, as illustration, in the hope that some of the conclusions I made here would help us to understand his other poems better.
