Abstract:
:Two strains of mice selected according to extreme phenotypes of susceptibility and resistance to oral tolerance (TS and TR mice, respectively) were infected with 1 x 10(7) Leishmania amazonensis promastigotes and studied comparatively. TS mice developed a minor pathology while permitting parasite growth with the presence of increased IL-4, IL-10 and IFN-gamma, and lower NO and IL-2 levels and delayed-type hypersensitivity (DTH). In contrast, in TR mice, footpad swelling was increased but parasite growth was reduced. They produced lower IL-4, IL-10 and IFN-gamma but increased NO, IL-2 levels, DTH, activated spleen macrophages and periarteriolar lymphoid sheaths. The results suggest that the tolerogenic TS mouse profile, with higher IL-10 production, impaired lesion development but also avoided macrophage leishmanicidal activity, maintaining in this manner a silent parasite load. On the other hand, the TR mouse profile contributed to lesion progression with controlled parasite load. To directly address the influence of oral tolerance on infection, mice were gavaged with OVA, and 7 days afterwards were infected and challenged to bystander suppression with OVA in the same footpad. In TR mice gavaged with 25 mg OVA the inflammatory lesion was largely enhanced, while with 5 mg OVA the lesion was diminished. In TS mice the footpad swelling was always lower. However, the bystander effect did not modify the establishment of infection; and similarly to the control non-bystander mice, parasite clearance was maintained in TR and prevented in TS mice. Therefore, a better comprehension of immunoregulation of innate and adaptive immunity in the early stages of infection is necessary for the development of protocols preventing inflammation and contributing to the elimination of parasites.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Tavares D,da Conceição Ribeiro R,Carlos da Silva Adoi
10.1016/j.micinf.2005.09.018subject
Has Abstractpub_date
2006-04-01 00:00:00pages
957-64issue
4eissn
1286-4579issn
1769-714Xpii
S1286-4579(06)00021-9journal_volume
8pub_type
杂志文章abstract::The mechanisms and molecular effectors of pathogen recognition systems in diverse hosts are highly conserved. Both plant and animal recognition of pathogens relies on sensing of Pathogen-Associated Molecular Patterns (PAMPs) by Pattern Recognition Molecules (PRMs). To detect bacteria, these sensor molecules can recogn...
journal_title:Microbes and infection
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journal_title:Microbes and infection
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journal_title:Microbes and infection
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journal_title:Microbes and infection
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pub_type: 杂志文章,评审
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pub_type: 杂志文章
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更新日期:2008-01-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2010.04.002
更新日期:2010-08-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
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更新日期:2011-11-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2008.01.012
更新日期:2008-04-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2006.11.006
更新日期:2007-02-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2011.06.001
更新日期:2011-11-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2013.02.002
更新日期:2013-06-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2007.07.001
更新日期:2007-09-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 历史文章,杂志文章,评审
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journal_title:Microbes and infection
pub_type: 杂志文章
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更新日期:2015-11-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2005.02.005
更新日期:2005-05-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2006.06.010
更新日期:2006-09-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/s1286-4579(00)00390-7
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pub_type: 杂志文章,评审
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更新日期:2003-03-01 00:00:00
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journal_title:Microbes and infection
pub_type: 信件
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更新日期:2003-01-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章
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更新日期:1999-08-01 00:00:00
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journal_title:Microbes and infection
pub_type: 杂志文章,评审
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更新日期:2003-04-01 00:00:00
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pub_type: 杂志文章,评审
doi:10.1016/j.micinf.2015.10.006
更新日期:2016-02-01 00:00:00