相关实验视频
Updated: Sep 19, 2025

13:54
Tractable Mammalian Cell Infections with Protozoan-primed Bacteria
Published on: April 2, 2013
10.6K
面对先天免疫记忆的病原体的实验进化增加了病毒性变异
Ana Korša1, Moritz Baur1, Nora K E Schulz1
1Institute for Evolution and Biodiversity, University of Münster, Münster, Germany.
PLoS pathogens
|June 18, 2025
概括
红面粉甲虫的先天免疫原始化并没有改变平均病原体毒性,但增加了其变异性. 病原体进化显示了移动体活动的增加,而不是对原始化的抗性.
科学领域:
- 进化生物学是进化的生物学.
- 流行病学 流行病学
- 病原体的进化过程
背景情况:
- 病毒性进化是由病原体适应性和宿主反应 (如耐药性和耐受性) 的权衡驱动的.
- 病原体进化传统上是在适应性免疫下研究的,人们对在先天性免疫原始化下的进化知之甚少.
研究的目的:
- 调查红面粉甲虫的先天免疫原始化如何影响它们的细菌病原体Bacillus thuringiensis tenebrionis的进化.
- 了解在宿主免疫记忆下演变的病原体中的遗传和表型变化.
主要方法:
- 在红面粉甲虫中Bacillus thuringiensis tenebrionis的实验进化与非红面粉甲虫的实验进化.
- 测量病原体的毒性和对宿主耐药性的评估.
- 全基因组测序,以识别进化病原体系中的遗传变化.
主要成果:
- 在原始宿主中,没有观察到平均病原体毒性的显著变化.
- 在原始宿主中演变的病原体线之间的毒性变异性显著增加.
- 病原体并没有对宿主免疫启动产生抗性;发现了移动体活性增加 (原体,等离子体).
- 毒素表达与等离子体拷贝数的变化有关,但不是直接与毒性有关.
结论:
- 天生的免疫记忆可以驱动病原体特征的变异性增加,可能增强适应各种环境的适应性.
- 了解在天生的免疫原始化下病原体进化对于医学,害虫控制和农业的应用至关重要.
相关概念视频
Immunological Memory
6.2K
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
6.2K
Defense Against Bacterial Pathogens
1.5K
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...
1.5K
Transduction
144
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
144
Immune Response Against Viral Pathogens
937
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...
937
Cells of the Adaptive Immune Response
4.8K
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
4.8K
Viral Mutations
33.1K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
33.1K

