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HIV进入抑制多肽VIR576可抑制抗原特异性CD4^+T细胞的体外活化:一种潜在的双功能杀微生物剂(英文)
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作者 李珉珉 张瑞涛 +4 位作者 胡义平 李建军 姜世勃 李晓娟 刘叔文 《南方医科大学学报》 CAS CSCD 北大核心 2014年第5期597-602,共6页
目的观察VIR576对CD4+T细胞活化的作用。方法分离DO11.10小鼠脾细胞并用OVA或ConA分别刺激,观察VIR576对抗原特异性和非特异性T细胞活化的影响;培养A2b CD4+T细胞株和磁珠分离的DO11.10小鼠脾脏CD4+CD25-效应性T细胞,分别用特异性抗原激... 目的观察VIR576对CD4+T细胞活化的作用。方法分离DO11.10小鼠脾细胞并用OVA或ConA分别刺激,观察VIR576对抗原特异性和非特异性T细胞活化的影响;培养A2b CD4+T细胞株和磁珠分离的DO11.10小鼠脾脏CD4+CD25-效应性T细胞,分别用特异性抗原激活,观察VIR576对抗原特性CD4+T细胞活化的影响。结果 VIR576抑制抗原特异性T细胞的活化,但对非抗原特异性T细胞活化的影响不显著,非特异性T细胞活化不需要TCR和CD3的交联。进一步研究发现,VIR576也可以下调抗原特异性CD4+T细胞的活化。结论粘膜活化的CD4+T细胞对HIV-1高度易感,VIR576不仅具有抑制HIV进入的活性还能够抑制CD4+T细胞活化,提示VIR576是一种有开发潜能的预防HIV性传播的杀微生物剂。 展开更多
关键词 HIV进入抑制多肽 GP41 融合多肽 VIR576 cd4’t细胞活化
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Novel function of perforin in negatively regulating CD4^+ T cell activation by affecting calcium signaling 被引量:2
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作者 Enguang Bi Chunjian Huang +10 位作者 Yu Hu Xiaodong Wu Weiwen Deng Guomei Lin Zhiduo Liu Lin Tian Shuhui Sun Kairui Mao Jia Zou Yuhan Zheng Bing Sun 《Cell Research》 SCIE CAS CSCD 2009年第7期816-827,共12页
Perforin is a pore-forming protein engaged mainly in mediating target T cell death and is employed by cytotoxic T lymphocytes (CTLs) and natural killer cells. However, whether it also plays a role in conventional C... Perforin is a pore-forming protein engaged mainly in mediating target T cell death and is employed by cytotoxic T lymphocytes (CTLs) and natural killer cells. However, whether it also plays a role in conventional CD4^+ T cell function remains unclear. Here we report that in perforin-deficient (PKO) mice, CD4^+ T cells are hyperproliferative in response to T cell receptor (TCR) stimulation. This feature of hyperproliferation is accompanied by the enhancement both in cell division and in IL-2 secretion. It seems that the perforin deficiency does not influence T cell development in thymus spleen and lymph node. In vivo, perforin deficiency results in increased antigen-specific T cell proliferation and antibody production. Furthermore, PKO mice are more susceptible to experimental autoimmune uveitis. To address the molecular mechanism, we found that after TCR stimulation, CD4^+ T cells from PKO mice display an increased intracellular calcium flux and subsequently enhance activation of transcription factor NFAT1. Our results indicate that perforin plays a negative role in regulating CD4^+ T cell activation and immune response by affecting TCR-dependent Ca^2+ signaling. 展开更多
关键词 PERFORIN t cell activation tCR signal autoimmune disease Ca^2+ signaling
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Fuzhengpaidu granule regulates immune activation molecules CD38 and human leukocyte antigen-D related on CD4+ and CD8+ T cells in patients with acquired immunodeficiency syndrome/human immunodeficiency virus 被引量:8
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作者 Feng Jiang Rongxin Zhang +4 位作者 Zhenfang Gu Huailing Zhang Huijun Guo Xin Deng Jian Liang 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2013年第4期439-443,共5页
OBJECTIVE: To evaluate the effect of Fuzhengpaidu granule (FZPDG) on immune activation molecules CD38 and human leukocyte antigen-D related (HLA-DR) on CD4+ and CD8+ cells in HIV/AIDS patients, and to explore the unde... OBJECTIVE: To evaluate the effect of Fuzhengpaidu granule (FZPDG) on immune activation molecules CD38 and human leukocyte antigen-D related (HLA-DR) on CD4+ and CD8+ cells in HIV/AIDS patients, and to explore the underlying mechanism of this therapy. METHODS: Plasma changes in CD3+, CD4+, CD8+, CD3+CD4+CD38+, CD3+CD4+HLA-DR+, CD3+ CD8+CD38+, and CD3+CD8+HLA-DR+levels in HIV/ AIDS patients treated with FZPDG for six months were examined by flow cytometry and compared with levels in healthy controls. RESULTS: The clinical trial included 34 outpatients with HIV/AIDS. Before treatment, plasma levels of CD38+ and HLA-DR+ on CD4/CD8 cells were higherthan those in 28 health controls (P<0.05). There were no significant changes in serum levels of CD3+, CD4+, and CD8+ T cells between pretreatment baseline versus after treatment, which were 82.85% ± 5.41% , 14.57% ± 10.31% and 54.55% ± 11.43% before treatment and 79.15% ± 8.21% , 19.96% ± 9.58% and 56.36% ± 11.67% after treatment, respectively (P>0.05). Plasma levels of CD3+ CD4+CD38+and CD3+CD4+HLA-DR+were 2.3%± 2.2% and 7.8%±5.5% before treatment and 1.2%± 0.8% and 2.6%±1.0% after treatment, respectively. Plasma levels of CD3+CD8+CD38+ and CD3+CD8+ HLA-DR+ were 41.4%±13.4% and 17.8%±11.3% beforetreatment,whichchangedto27.1%±10.2%and 3.8%±2.4%aftertreatment,respectively(P<0.05). CONCLUSION: HIV/AIDS patients exhibited an immune activation profile following FZPDG treatment. A potential mechanism of action for FZPDG appears to lie in its ability to up-regulate CD38 and HLA-DR levels on CD4+ T cells, and down-regulate them on CD8+ cells, thereby modulating immune activation of CD4+and CD8+T cells. 展开更多
关键词 HIV Acquired immunodeficiency syndrome Fuzhengpaidu granule Activated-leukocyte cell adhesion molecule HLA-DR antigens Immunocompetence
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