45 resultados para 2009 Influenza A (H1N1) vaccine
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Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-04T06:57:43Z No. of bitstreams: 1 71.pdf: 92858 bytes, checksum: 2a0a4972af8e56b0fced818042dd6dbd (MD5)
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获得性免疫缺陷综合征(AIDS)是一种由人类免疫缺陷病毒(HIV)引起的,以全身免疫系统受到严重损害为特征的传染性疾病。从目前HIV-1的流行趋势来看,HIV-1 C亚型已经成为全球最主要的流行株之一,因此,针对HIV-1 C亚型的疫苗设计颇为重要。gp120作为HIV-1的包膜糖蛋白,能够诱导广泛的中和抗体反应,中和进入机体的病毒粒子,阻止病毒早期感染,所以本实验选取HIV-1 C亚型密码子优化的gp120作为免疫原进行研究。目前的疫苗研究中,腺病毒载体是较理想的病毒载体之一,具有安全性好、外源基因容纳量大、感染效率高、操作简便等优点。我们以复制缺陷型腺病毒为载体,构建了表达HIV-1 C亚型密码子优化的gp120的重组腺病毒vAd-gp120,经Western Blot方法检测到了gp120蛋白的表达。树突状细胞(DC)是已知最强的抗原呈递细胞(APC),也是目前发现的唯一能够刺激初始型T细胞增殖的细胞。经抗原致敏的DC可通过MHC-Ⅰ、MHC-Ⅱ途径递呈抗原,并激活T细胞,从而激发体内的体液免疫和特异性细胞免疫反应。我们利用Amaxa系统将HIV-1 C亚型gp120基因转入人外周血单核细胞来源的DC,构建了以DC为载体的治疗性疫苗,并对其功能进行初步研究,发现负载gp120的DC能够显著刺激淋巴细胞的增殖、增强CD8T细胞表面活化分子CD25的表达以及促进CD8T细胞分泌++IFN-γ,为下一步DC治疗性疫苗的体内研究奠定了基础。
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<正>2010年1月9~10日,近空间飞行器的关键基础科学问题重大研究计划2009年度学术交流会在北京市昌平区召开.参加会议的有该重大研究计划学术指导专家组、秘书组和管理工作组的成员,项目负责人和部分项目组成员,共计150余人.
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In this report, matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) was used to study the binding interactions between calmodulin and two target peptides (melittin and substance P). Various matrix conditions were tested and the less acidic matrix DHAP and THAP were found to favor the survival of the intact calcium-calmodulin as well as the calmodulin-peptide complexes. However, the application of direct MALDI-MS to detect the intact complexes turned out to be very difficult due to the dissociation of the complexes and the formation of nonspecific aggregates. In contrast, the specific binding of the target peptides to calmodulin could be easily deduced using intensity-fading (IF) MALDI-MS. Compared with the nonbinding control, clear reduction in the ion abundances of the target peptides was observed with the addition of calmodulin.