概括
干扰素- (IFN-) 诱导人体内皮细胞和纤维细胞表达主要基因相容性复合体II (Ia) 类抗原. 这种表达使T细胞能够进行功能识别,这可能会影响异种移植的排斥.
科学领域:
- 免疫学 免疫学 免疫学
- 移植生物学 移植生物学
- 细胞和分子医学 细胞和分子医学
背景情况:
- 对血管部件的T淋巴细胞反应对于异位移植排斥至关重要.
- 细胞分解性T淋巴细胞 (CTL) 诱导依赖于识别外来II类 (Ia) 抗原,而杀死通常涉及I类抗原.
- 人们认为Ia抗原表达受限于免疫细胞,移植中的乘客白细胞是排斥的关键.
研究的目的:
- 在非血造细胞上研究Ia抗原表达的诱导.
- 为了确定免疫干扰素 (IFN-) 是否可以诱导各种人体介质细胞上的Ia表达.
- 评估诱导Ia表达在T细胞相互作用中的功能相关性.
主要方法:
- 治疗人类静脉内皮细胞 (HUVE),人类前皮毛细血管内皮细胞 (HFCE),SV-HUVE细胞和人类皮肤纤维细胞 (HDF) 用复合IFN-.
- 免疫光显微镜检测Ia抗原表达.
- 功能性测试以评估T细胞对Ia载体细胞的识别.
主要成果:
- 除了之前报告的HUVE细胞外,IFN-玛还诱导了HFCE细胞,SV-HUVE细胞和HDF细胞的Ia表达.
- 在HUVE细胞和HDF细胞表达的Ia抗原被人类T细胞功能性地识别.
- 有证据表明,T细胞和介质细胞通过Ia抗原识别之间存在双向相互作用.
结论:
- 免疫干扰素 (IFN-) 是人类内皮细胞和纤维细胞上主要基因相容性复合体II (Ia) 类抗原表达的强有力的诱导剂.
- 这些诱导的Ia抗原的T细胞的功能性识别表明它们在异种移植排斥中起着重要作用.
- 这种相互作用突出显示了T细胞与非造血细胞在移植的背景下接触的潜在途径.
相关概念视频
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...
Special Features of Adaptive Immunity
The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Antigens Involved in Adaptive Immunity
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
B Cell Activation and Differentiation
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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...


