A mouse model for the human pathogen Salmonella typhi.

A mouse model for the human pathogen Salmonella typhi.
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DOI:
10.1016/j.chom.2010.09.003
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发表时间:
2010-10-21
影响因子:
30.3
通讯作者:
Galán JE
Galán JE
中科院分区:
医学1区
文献类型:
--
作者:
Song J;Willinger T;Rongvaux A;Eynon EE;Stevens S;Manz MG;Flavell RA;Galán JE

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伤寒沙门氏菌(S.Typhi)是伤寒的病因,伤寒是一种危及人类生命的疾病。由于伤寒沙门氏菌严格的人类宿主特异性,缺乏动物模型一直是了解其发病机制和开发安全有效的伤寒疫苗的重大障碍。我们在此报告伤寒沙门氏菌感染小鼠模型的开发。我们发现,移植人胎肝造血干细胞和祖细胞的免疫缺陷 Rag2 -/- γc -/- 小鼠能够支持伤寒沙门氏菌复制和持续感染。伤寒沙门氏菌菌株携带其对人类毒力所需的基因突变,无法在这些人源化小鼠中复制。相比之下,另一种不能产生最近鉴定的伤寒毒素的突变菌株表现出复制增加,表明该毒素在建立持续感染中具有潜在作用。此外,受感染的动物对伤寒沙门氏菌产生了人类先天性和适应性免疫反应,导致细胞因子和病原体特异性抗体的产生。因此,这些结果表明该动物模型可用于研究伤寒沙门氏菌发病机制并评估潜在的伤寒候选疫苗。
Salmonella enterica serovar Typhi (S. Typhi) is the cause of typhoid fever, a life-threatening disease of humans. The lack of an animal model due to S. typhi's strict human host specificity has been a significant obstacle in the understanding of its pathogenesis and the development of a safe and effective vaccine against typhoid fever. We report here the development of a mouse model for S. Typhi infection. We showed that immunodeficient Rag2 -/- γc -/- mice engrafted with human fetal liver hematopoietic stem and progenitor cells were able to support S. Typhi replication and persistent infection. A S. Typhi strain carrying a mutation in a gene required for its virulence in humans was not able to replicate in these humanized mice. In contrast, another mutant strain unable to produce the recently identified typhoid toxin, exhibited increased replication suggesting a potential role for this toxin in the establishment of persistent infection. Furthermore, infected animals mounted a human innate and adaptive immune response to S. Typhi resulting in the production of cytokines and pathogen-specific antibodies. These results therefore indicate that this animal model can be used to study S. Typhi pathogenesis and to evaluate potential vaccine candidates against typhoid fever.
DOI: 10.1038/icb.2009.31
发表时间: 2009-07
影响因子: 4
作者:
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通讯作者: Levine, Myron M
DOI: 10.1038/nrg2703
发表时间: 2010-01
期刊: Nature reviews. Genetics
影响因子: --
作者:
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鼠伤寒沙门氏菌持续存在于慢性感染 Nramp1+/+ 小鼠肠系膜淋巴结的巨噬细胞内,并可通过 IFNγ 中和重新激活。
DOI: 10.1084/jem.20031319
发表时间: 2004-01-19
影响因子: 15.3
作者:
Monack, DM;Bouley, DM;Falkow, S
通讯作者: Falkow, S
DOI: 10.1016/j.clim.2009.12.008
发表时间: 2010-04
期刊: Clinical immunology (Orlando, Fla.)
影响因子: --
作者:
Brehm MA;Cuthbert A;Yang C;Miller DM;DiIorio P;Laning J;Burzenski L;Gott B;Foreman O;Kavirayani A;Herlihy M;Rossini AA;Shultz LD;Greiner DL
通讯作者: Greiner DL
DOI: 10.1086/649541
发表时间: 2010-01-15
期刊: Clinical infectious diseases : an official publication of the Infectious Diseases Society of America
影响因子: --
作者:
Crump JA;Mintz ED
通讯作者: Mintz ED