与年龄相关的免疫失调和B细胞功能障碍导致SFTSV感染的严重结果
Eun-Ha Kim1, Ho Bin Jang2, Se-Mi Kim2
1Center for Virus Research Resource, Korea Virus Research Institute, Institute for Basic Science (IBS), Daejeon, Republic of Korea.
PLoS pathogens
|August 12, 2025
概括
衰老会损害对严重发烧与血小板缩小综合征病毒 (SFTSV) 的免疫反应,增加老年人死亡率. 这项研究揭示了老的免疫失调和病毒储备,为干预提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 老年学是一门学科.
背景情况:
- 衰老严重影响免疫对病毒感染的反应,如严重发烧与血栓塞缩综合征病毒 (SFTSV).
- 由于高死亡率和缺乏有效治疗方法,SFTSV对患者,特别是老年患者构成重大威胁.
- 对SFTSV病原体的年龄依赖机制仍然不太了解.
研究的目的:
- 使用模型阐明SFTSV病原体的年龄依赖机制.
- 确定关键的免疫细胞群和参与老年人SFTSV感染严重程度的途径.
主要方法:
- 利用模型,一个免疫能力强的系统,准确地模仿人类的SFTSV感染.
- 进行多组织单细胞RNA测序和组织病理学分析以检查免疫反应.
- 进行了老年和年轻成年之间的比较分析,以及人类致命病例.
主要成果:
- 与年轻不同的是,老由于细胞死亡和血细胞分裂,B细胞和T细胞显著减少.
- 老的免疫调节障碍包括激活的T-bet+年龄相关记忆B细胞 (ABCs) 和增殖的缺陷血清细胞 (MKI67+ PB1).
- 确定MKI67+ PB1细胞是主要的病毒储存库,驱动系统传播,并在老和人类致命病例中主导SFTSV+细胞. 单细胞和巨细胞显示炎症基因表达增加,导致过度炎症.
结论:
- 失调的记忆B细胞反应和超炎症是依赖年龄的SFTSV病原体的关键驱动因素.
- 缺陷的血芽细胞 (MKI67+ PB1) 作为关键的病毒储存库,并有助于老年人群的疾病严重程度.
- 这些发现突出了减轻老年人SFTSV严重性的潜在治疗目标.
相关概念视频
Immunodeficiency Diseases
1.2K
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
There are three main causes of immunodeficiency...
1.2K
Pulmonary Tuberculosis I
324
Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
324
Humoral Immune Responses
75.9K
Overview
75.9K
Immune Response Against Viral Pathogens
917
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...
917
Factors Affecting the Risk of Infection
12.3K
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
12.3K
Cell-mediated Immune Responses
72.5K
Overview
72.5K


