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相关概念视频

Bacterial Meningitis01:24

Bacterial Meningitis

Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...

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相关实验视频

Updated: Jun 23, 2026

Humanized Mouse Model to Study Bacterial Infections Targeting the Microvasculature
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鼠标中枢神经系统免疫细胞的单细胞地图显示了Streptococcus suis引起的脑膜炎进展期间独特的感染阶段免疫特征

Xuan Jiang1, Jikun Mei1, Junhui Zhu1

  • 1State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, China.

Communications biology
|August 30, 2025
PubMed
概括

这项研究揭示了Streptococcus suis 2型脑膜炎期间大脑中免疫细胞的动态变化. 关键免疫细胞种群的变化,为细菌脑膜炎的发病和潜在的治疗点提供了洞察力.

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Intracranial Subarachnoidal Route of Infection for Investigating Roles of Streptococcus suis Biofilms in Meningitis in a Mouse Infection Model
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Isolating Central Nervous System Tissues and Associated Meninges for the Downstream Analysis of Immune cells
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相关实验视频

Last Updated: Jun 23, 2026

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Intracranial Subarachnoidal Route of Infection for Investigating Roles of Streptococcus suis Biofilms in Meningitis in a Mouse Infection Model
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科学领域:

  • 免疫学
  • 神经科学
  • 微生物学

背景情况:

  • 细菌性脑膜炎,特别是Streptococcus suis血清型2 (SS2),会导致严重的神经损伤.
  • 免疫微环境在脑膜炎进展中的作用尚未完全理解.
  • 在SS2脑膜炎期间大脑的动态免疫系统变化需要详细调查.

研究的目的:

  • 在SS2脑膜炎期间全面描述小鼠大脑中的免疫细胞组成和表型.
  • 阐明不同感染阶段的动态免疫场景和细胞反应.
  • 确定SS2脑膜炎的潜在诊断标志物和治疗点.

主要方法:

  • 用单细胞质细胞测量分析雌性小鼠大脑中的免疫细胞.
  • 在SS2脑膜炎的不同阶段对免疫细胞群进行了分析.
  • 相关性分析将免疫细胞群与SS2感染进展联系起来.

主要成果:

  • 在脑膜炎期间T细胞和树突细胞增加;B细胞在晚期增加.
  • 中性粒细胞在急性阶段表现出细胞和杀菌作用.
  • 微细胞呈现出从稳态到激活的顺序变化,MHCII和TNF-α的增强.
  • 大细胞 (边缘相关和单细胞衍生) 调高了CD38和MHCII.
  • CD11c+CD8+T细胞成为IFN-γ的主要来源.
  • 其他淋巴细胞如B细胞,NK细胞和ILC3s与脑膜炎进展相关.

结论:

  • 这项研究揭示了SS2脑膜炎期间独特的,针对感染阶段的免疫微环境.
  • 这些发现为了解细菌性脑膜炎免疫学提供了资源.
  • 确定的免疫细胞动态和标记可以为诊断和治疗策略提供信息.