Salmonella Typhi: Enhancement of Endemic Potential through its Unique Virulence Factors

伤寒沙门氏菌：通过其独特的毒力因子增强地方病的可能性

基本信息

批准号：
10543076
负责人：
Jeongmin Song
金额：
$ 58.14万
依托单位：
CORNELL UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2018
资助国家：
美国
起止时间：
2018-12-21 至 2024-11-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10543076
关键词：
Acetylation Acute Africa South of the Sahara Anabolism Antibiotic Therapy B-Lymphocytes Bacteria Cell Cycle Arrest Cell Death Cell Nucleus Cells Cessation of life Child Chronic Communicable Diseases Complex Cytoplasm DNA Damage Data Development Disease Outbreaks Endocytosis Environment Enzymes Etiology Exotoxins Gram-Negative Bacteria Human Infection Integration Host Factors Intervention Knowledge Leukopenia Lymphocyte Macrophage Maintenance Mediating Membrane Modeling Modification Molecular Mono(ADP-Ribose) Transferases Multi-Drug Resistance Organ Penetration Persons Polysaccharides Proteins Recording of previous events Regulation Research Role Salmonella Salmonella paratyphi Salmonella typhi Series Southeastern Asia Structure T-Lymphocyte Testing Toxin Typhoid Fever Vaccination Vacuole Vi capsular polysaccharide Virulence Factors acute infection chronic infection efficacious intervention experimental study extensive drug resistance extracellular global health holotoxins humanized mouse low and middle-income countries mouse model mutant neutrophil novel novel strategies nuclease pathogen prevent programs receptor binding receptor mediated endocytosis success trafficking transmission process vesicle transport

项目摘要

PROJECT SUMMARY/ABSTRACT Typhoid fever is one of the most successful and devastating infectious diseases in human history and remains a serious real-world problem that kills 0.2 million and sickens 21 million people every year. The etiological agent of typhoid fever is the gram-negative bacterium Salmonella enterica serovar Typhi (S. Typhi), which is adapted solely to humans. S. Typhi’s persistent-carriage infection state, exemplified by “Typhoid Mary,” is critical for person-to-person transmission and the continued maintenance of the bacterium within humans. If we are to effectively contain and eradicate typhoid fever, we need to implement strategies inhibiting S. Typhi’s transition to the persistent infection state. First, however, we must understand how S. Typhi facilitates transition from acute to a persistent/carriage infection state. In a humanized mouse model that serves as a S. Typhi’s persistent infection model, typhoid toxin, a distinct A2B5 toxin or exotoxin produced by intracellular S. Typhi, has been identified as a critical bacterial determinant facilitating the transition of S. Typhi infection to the persistent-carriage infection state. In this R01, we propose a series of experiments to better understand the typhoid toxin-mediated host cell interactive mechanism promoting S. Typhi’s persistent infection. The proposed research may provide critical information for the development of efficacious intervention strategies to better control S. Typhi’s transmission and outbreaks.

项目概要/摘要伤寒是人类历史上最成功和最具破坏性的传染病之一，并且仍然存在这是一个严重的现实问题，每年导致 20 万人死亡、2100 万人患病。伤寒的病原体是革兰氏阴性细菌肠沙门氏菌伤寒血清型（S. Typhi），它适应于仅对人类来说，伤寒沙门氏菌的持续感染状态（以“伤寒玛丽”为例）对于人类来说至关重要。如果我们愿意的话，人与人之间的传播以及细菌在人体内的持续存在。为了有效遏制和根除伤寒，我们需要实施抑制伤寒沙门氏菌转变的策略然而，首先，我们必须了解伤寒沙门氏菌如何促进急性感染状态的转变。在作为伤寒沙门氏菌持续感染的人源化小鼠模型中。感染模型，伤寒毒素，一种由细胞内伤寒沙门氏菌产生的独特 A2B5 毒素或外毒素，已被被确定为促进伤寒沙门氏菌感染向持续携带转变的关键细菌决定因素在这个R01中，我们提出了一系列实验来更好地了解伤寒毒素介导的情况。拟议的研究可能提供促进伤寒沙门氏菌持续感染的宿主细胞相互作用机制。制定有效干预策略以更好地控制伤寒沙门氏菌的关键信息传播和爆发。

项目成果

期刊论文数量（13）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Direct IgG epitope mapping on bacterial AB toxins by cryo-EM.

DOI：
10.1016/j.xpro.2021.100852
发表时间：
2021-12-17
期刊：
STAR protocols
影响因子：
0
作者：
Nguyen T;Song J
通讯作者：
Song J

Complete Genome Sequence of Salmonella enterica Serovar Typhi Strain ISP2825.

DOI：
10.1128/mra.00804-21
发表时间：
2021-10-14
期刊：
Microbiology resource announcements
影响因子：
0.8
作者：
Lee GY;Song J
通讯作者：
Song J

Neutralization of Typhoid Toxin by Alpaca-Derived, Single-Domain Antibodies Targeting the PltB and CdtB Subunits.

DOI：
10.1128/iai.00515-21
发表时间：
2022-02-17
期刊：
Infection and immunity
影响因子：
3.1
作者：
Dulal HP;Vance DJ;Neupane DP;Chen X;Tremblay JM;Shoemaker CB;Mantis NJ;Song J
通讯作者：
Song J

Enteric Fever Diagnosis: Current Challenges and Future Directions.