Leishmania amazonensis infection impairs dendritic cell migration from the inflammatory site to the draining lymph node

BMC Infectious Diseases

Washington LC dos-Santos²  José O Mengel¹  Angela MP Taguchi²  Priscila G Doria²  Micely DR Hermida² 

[1] Faculty of Medicine of Petrópolis, FMP-FASE, Petrópolis, Brazil;Centro de Pesquisas Gonçalo Moniz, Oswaldo Cruz Foundation, Fiocruz, LPBI, Salvador, Brazil

关键词: Macrophage;    Lymph node;    Dendritic cell;    Leukocyte migration;    Leishmania;   

Others  :  1125814
DOI  :  10.1186/1471-2334-14-450

 received in 2014-03-17, accepted in 2014-08-13,  发布年份 2014

【 摘 要 】

Background

In vitro studies show that Leishmania infection decreases the adhesion of inflammatory phagocytes to connective tissue by a mechanism dependent on the modulation of integrin function. However, we know little about the influence of this reduction in leukocyte adhesion on parasite dissemination from the infection site.

Methods

In this work, we used a model of chronic peritonitis induced by thioglycollate to study the effect of L. amazonensis infection on the ability of inflammatory phagocyte populations to migrate from an inflammatory site to the draining lymph node. Uninfected or Leishmania-infected thioglycollate-elicited peritoneal exudate cells were transferred from C57BL/6 to BALB/c mice or from Ly5.1⁺ to Ly5.1^- mice. The transferred cells were injected into the peritoneal cavity and tracked to the draining lymph node.

Results

Migrating cells corresponded to approximately 1% of the injected leukocytes. The proportion of migrating CD11b⁺CD11c⁺ (myeloid dendritic cell) was lower after incubation with Leishmania (1.3 to 2.6 times lower in the experiments using C57BL/6 to BALB/c animals and 2.7 to 3.4 times lower in the experiments using Ly5.1⁺ to Ly5.1^- animals) than after leukocyte incubation with medium alone (P < 0.01). There was no consistent decrease in the migration of CD11b⁺F4/80⁺ (macrophage) or SSC^hi GR-1⁺ (neutrophil) populations.

Conclusions

Coincubation with Leishmania changes the migratory pattern of dendritic cells in vivo. Such changes in dendritic cell migration may be associated with immunological events that maintain inflammation at the sites of infection.

【 授权许可】

   
2014 Hermida et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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