细胞巨乳病毒载体违反了CD8+ T细胞表位识别范式
Scott G Hansen1, Jonah B Sacha, Colette M Hughes
1Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA.
Science (New York, N.Y.)
|May 25, 2013
概括
猿类免疫缺陷病毒 (SIV) 蛋白质表达的 rhesus 细胞巨乳病毒 (RhCMV) 载体诱导多种 CD8 (((+)) T 细胞反应. 这些细胞巨乳病毒 (CMV) 载体的遗传编程可以控制T细胞表皮图识别模式,从而改善免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- CD8(+) T细胞的反应往往局限于有限的一组病原体或疫苗编码的.
- 这种有限的认可可能会阻碍有效的抗病原体免疫力.
研究的目的:
- 为了研究由猿类免疫缺陷病毒 (SIV) 蛋白表达 rhesus cytomegalovirus (RhCMV) 载体引起的 CD8(+) T 细胞表皮图识别模式.
- 确定特定的RhCMV基因在调节这些T细胞反应中的作用.
主要方法:
- 在 rhesus 模型中利用表达 SIV 蛋白质的 RhCMV 载体.
- 分析了CD8(+) T细胞的反应,重点是表位识别和主要基因相容性复合体 (MHC) I类和II类分子的限制.
- 通过基因操纵研究了特定RhCMV基因 (Rh189,Rh157.5,Rh157.4,Rh157.6) 对T细胞反应的影响.
主要成果:
- RhCMV 载体引起了特定于 SIV 的 CD8 ((+) T 细胞识别多样化和乱交的表位,包括那些受到 MHC II 类限制的表位.
- 编码RhCMV的Rh189基因抑制了正规的SIV表位特异性CD8(+) T细胞反应.
- 只有当Rh157.5,Rh157.4和Rh157.6基因缺席时,才观察到与MHC I类和II类受限制的CD8 (((+) T细胞反应.
结论:
- 细胞巨乳病毒 (CMV) 载体可以通过基因工程来指导CD8(+) T细胞表位识别的独特模式.
- 这种基因可编程性为通过定制的T细胞反应增强抗病原体免疫力提供了一种新的策略.
相关概念视频
01:27Cytomegalovirus Disease
Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
01:27Cytotoxic T Cells-mediated Immune Response
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
01:29Immune Response Against Viral Pathogens
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...