関連する実験動画
Updated: Jul 20, 2026

13:54
Tractable Mammalian Cell Infections with Protozoan-primed Bacteria
Published on: April 2, 2013
標的細胞におけるウイルスタンパク質合成の欠如におけるT細胞細胞毒性
U Koszinowski1, M J Gething, M Waterfield
1ICRF Tumour Immunology Unit, Department of Zoology, University College London, UK.
Nature
|May 12, 1977
まとめ
細胞毒性T細胞は,ウイルスの抗原をメジャー・ヒストコンパティビリティ・コンプレックス (MHC) 分子と関連付けることで,ウイルスに感染した細胞を認識します. この研究は,仙台ウイルスの封筒が細胞を直接改変し,内部ウイルスの改変を除いて,T細胞殺害のターゲットにすることができることを示しています.
科学分野:
- 免疫学 免疫学とは
- ウイルス学 ウイルス学 ウイルス学
- 分子生物学は分子生物学である.
背景:
- 細胞毒性Tリンパ球 (CTLs) は,ウイルスに感染した細胞を認識し,排除することによって,抗ウイルス免疫において重要な役割を果たします.
- 認識には,ウイルス抗原と主要基因相容性複合体 (MHC) のクラスI分子との相互作用が標的細胞表面に含まれる.
- ウイルスが標的細胞を内部 ("内部からの改変") または外部 ("外部からの改変") で変異させるメカニズムは,依然として調査の分野です.
研究 の 目的:
- 細胞毒性T細胞がウイルスに感染した標的細胞を認識するメカニズムを調査する.
- 外部ウイルス成分がT細胞認識のための標的細胞を直接修正できるかどうかを判断する.
- 仙台ウイルス感染症の文脈で",内部からの改変"と"外部からの改変"を区別する.
主な方法:
- 不活性化された仙台ウイルスと孤立した仙台ウイルスの封筒を使用しました.
- これらの成分が,Sendai virus-immune T細胞の殺戮に標的細胞を敏感にする能力を in vitroで評価した.
- 改変メカニズムを明らかにするために,ウイルス全体とウイルス封筒の効果を比較しました.
主要な成果:
- イナクティブ化された仙台ウイルスと孤立した仙台ウイルスの封筒は,標的細胞を改変するのに十分でした.
- 改変された標的細胞は,仙台ウイルス-免疫T細胞媒介溶解の特定の標的となった.
- これらの発見は,仙台ウイルスが誘発した標的細胞認識の"内部からの改変"仮説を排除しています.
結論:
- 標的細胞の主要な組織適合性複合体 (MHC) 抗原は,外部ウイルス成分によって変化することがあります.
- 仙台ウイルスの"外部からの改変"は,細胞毒性T細胞による標的細胞認識のための有効なメカニズムです.
- これは,ウイルス感染症におけるCTLの関連認識メカニズムに関する重要な洞察を提供します.
関連する概念動画
Cell-mediated Immune Responses
Overview
Cells of the Innate Immune Response
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Cytotoxic 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...
Defense Against Bacterial Pathogens
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Immune 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...
Cytomegalovirus 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...

