一个依赖于乙化的开关是链球菌感染期间宿主疾病耐受性的基础
Sumit Kumar Paudel1, Sowmya Gannavaram1, Michael G Caparon2
1Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, Huntington, 25755, WV, USA.
Scientific reports
|March 4, 2026
概括
菌 pyogenes pyruvate dehydrogenase (PDH) 通过改变新陈代谢和表观遗传调节来操纵宿主免疫力. 这项研究揭示了细菌PDH如何通过代谢和表观遗传交叉影响疾病耐受性 (DT).
科学领域:
- 免疫代谢过程中的免疫代谢.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 微生物病原体的产生
背景情况:
- 以前发现,Streptococcus pyogenes pyruvate脱酶 (PDH) 通过调节短链脂肪酸 (SCFA) 介导的宿主乙-CoA和IL-10水平来抑制宿主疾病耐受性 (DT).
- 了解这种免疫代谢操纵的转录和表观遗传机制对于破译宿主-病原体相互作用至关重要.
研究的目的:
- 描述Streptococcus pyogenes PDH操纵宿主疾病耐受性的全球转录和表观遗传机制.
- 研究代谢重编程和表观遗传调节在宿主对细菌感染的反应中的作用.
主要方法:
- 组织学和超结构分析.
- 重新分析单细胞和大量RNA-seq数据集.
- 感染组织的代谢分析.
- 来自HDAC抑制巨的转录组数据集的计算分析.
主要成果:
- 在S. pyogenes中,PDH缺乏导致了广泛的免疫学重新连接,包括细胞内细菌制,髓状细胞扩张和改变细胞-细胞通信.
- 感染诱导了从乙-CoA代谢转移到糖溶解的代谢转变,激活了缺氧信号,铁处理和NRF2介导的抗氧化反应.
- 基因组脱乙酶 (HDAC) 抑制取消了保护性转录组,表明依赖乙化抑制调节了宿主DT反应.
结论:
- 细菌PDH采用一种代谢-表观遗传交叉策略来操纵宿主疾病耐受性.
- 乙化被确定为缓解感染相关组织损伤的关键控制点,提供潜在的治疗点.
更多相关视频
相关概念视频
Defense Against Bacterial Pathogens
3.2K
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...
3.2K
Special Features of Adaptive Immunity
3.7K
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,...
3.7K
Cell-mediated Immune Responses
85.3K
Overview
85.3K
Transduction
2.1K
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...
2.1K
Drug Toxicity: Allergic Reactions
75
Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
75
Phase II Reactions: Acetylation Reactions
940
Acetylation, a phase II biotransformation reaction, introduces an acetyl group to drugs or their metabolites. Acetyltransferase enzymes facilitate this reaction, which resembles α-amino acid conjugation due to the addition of a functional group to the drug molecule.
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
The substrates for acetylation are typically drugs or their metabolites with an amino, sulfonamide, or hydrazine functional group. Acetylation can occur at several points in the drug molecule, including primary, secondary, and...
940


