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Open Access Research article

Trafficking of phagocytic peritoneal cells in hypoinsulinemic-hyperglycemic mice with systemic candidiasis

Thais Fernanda de Campos Fraga-Silva12, James Venturini13 and Maria Sueli Parreira de Arruda1*

Author Affiliations

1 Faculdade de Ciências, Bauru, Departamento de Ciências Biológicas, Laboratório de Imunopatologia Experimental (LIPE), UNESP - Univ Estadual Paulista, Bauru, SP 17033-360, Brazil

2 Instituto de Biociências, UNESP - Univ Estadual Paulista, Botucatu 18618-970, Brazil

3 Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Botucatu, SP, Brazil

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BMC Infectious Diseases 2013, 13:147  doi:10.1186/1471-2334-13-147

Published: 25 March 2013

Abstract

Background

Candidemia is a severe fungal infection that primarily affects hospitalized and/or immunocompromised patients. Mononuclear phagocytes have been recognized as pivotal immune cells which act in the recognition of pathogens, phagocytosis, inflammation, polarization of adaptive immune response and tissue repair. Experimental studies have showed that the systemic candidiasis could be controlled by activated peritoneal macrophages. However, the mechanism to explain how these cells act in distant tissue during a systemic fungal infection is still to be elucidated. In the present study we investigate the in vivo trafficking of phagocytic peritoneal cells into infected organs in hypoinsulinemic-hyperglycemic (HH) mice with systemic candidiasis.

Methods

The red fluorescent vital dye PKH-26 PCL was injected into the peritoneal cavity of Swiss mice 24 hours before the intravenous inoculation with Candida albicans. After 24 and 48 hours and 7 days of infection, samples of the spleen, liver, kidneys, brain and lungs were submitted to the microbiological evaluation as well as to phagocytic peritoneal cell trafficking analyses by fluorescence microscopy.

Results

In the present study, PKH+ cells were observed in the peritoneum, kidney, spleen and liver samples from all groups. In infected mice, we also found PKH+ cells in the lung and brain. The HH condition did not affect this process.

Conclusions

In the present study we have observed that peritoneal phagocytes migrate to tissues infected by C. albicans and the HH condition did not interfere in this process.