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Immunocompetent host develops mild intestinal inflammation in acute infection with Toxoplasma gondii

Watanabe, Paulo da Silva ; Trevizan, Aline Rosa ; Silva-Filho, Saulo Euclides ; Góis, Marcelo Biondaro ; Garcia, João Luiz ; Cuman, Roberto Kenji Nakamura ; Breithaupt-Faloppa, Ana Cristina ; Sant Ana, Débora de Mello Gonçales ; Nogueira de Melo, Gessilda de Alcantara Consolaro, Marcia Edilaine Lopes

PloS one, 2018-01, Vol.13 (1), p.e0190155-e0190155 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Immunocompetent host develops mild intestinal inflammation in acute infection with Toxoplasma gondii
Autor: Watanabe, Paulo da Silva ; Trevizan, Aline Rosa ; Silva-Filho, Saulo Euclides ; Góis, Marcelo Biondaro ; Garcia, João Luiz ; Cuman, Roberto Kenji Nakamura ; Breithaupt-Faloppa, Ana Cristina ; Sant Ana, Débora de Mello Gonçales ; Nogueira de Melo, Gessilda de Alcantara
Consolaro, Marcia Edilaine Lopes
Assuntos: Acute Disease ; Adhesion ; Adhesion tests ; Animals ; Biology and Life Sciences ; Blood ; Blood cells ; CD31 antigen ; Complications and side effects ; Cysts ; Cytokines ; Deoxyribonucleic acid ; DNA ; Duodenum ; Euthanasia ; Experiments ; Ileum ; Immune response ; Immune system ; Immunocompetence ; Immunocompromised host ; Immunohistochemistry ; Infections ; Inflammation ; Inflammation - pathology ; Inflammatory bowel diseases ; Innate immunity ; Intercellular adhesion molecule 1 ; Intercellular Adhesion Molecule-1 - metabolism ; Intestine ; Intestines - pathology ; Jejunum ; Leukocytes ; Medicine and Health Sciences ; Mesentery ; Microscopy ; Nitric oxide ; Nitric Oxide - metabolism ; Oocysts ; P-selectin ; Parasites ; Parasitology ; Peripheral blood ; Peroxidase ; Peroxidase - metabolism ; Pharmaceutical sciences ; Production increases ; Protozoa ; Rats ; Real-Time Polymerase Chain Reaction ; Risk factors ; Rodents ; Studies ; Toxoplasma - genetics ; Toxoplasma - isolation & purification ; Toxoplasma - pathogenicity ; Toxoplasma gondii ; Toxoplasmosis ; Toxoplasmosis, Animal - pathology ; Vertebrates
É parte de: PloS one, 2018-01, Vol.13 (1), p.e0190155-e0190155
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Competing Interests: The authors have declared that no competing interests exist.
Descrição: Toxoplasma gondii (T. gondii) is the causative agent of toxoplasmosis, common zoonosis among vertebrates and high incidence worldwide. During the infection, the parasite needs to transpose the intestinal barrier to spread throughout the body, which may be a trigger for an inflammatory reaction. This work evaluated the inflammatory alterations of early T. gondii infection in peripheral blood cells, in the mesenteric microcirculation, and small intestinal tissue by measurement of MPO (myeloperoxidase) activity and NO (nitric oxide) level in rats. Animals were randomly assigned into control group (CG) that received saline orally and groups infected with 5,000 oocysts for 6 (G6), 12 (G12), 24 (G24), 48 (G48) and 72 hours (G72). Blood samples were collected for total and differential leukocyte count. Intravital microscopy was performed in the mesentery to evaluate rolling and adhesion of leukocytes. After euthanasia, 0.5cm of the duodenum, jejunum and ileum were collected for the determination of MPO activity, NO level and PCR to identify the parasite DNA and also the mesentery were collected to perform immunohistochemistry on frozen sections to quantify adhesion molecules ICAM-1, PECAM-1 and P-Selectin. The parasite DNA was identified in all infected groups and there was an increase in leukocytes in the peripheral blood and in expression of ICAM-1 and PECAM-1 in G6 and G12, however, the expression of P-selectin was reduced in G12. Leukocytes are in rolling process during the first 12 hours and they are adhered at 24 hours post-infection. The activity of MPO increased in the duodenum at 12 hours, and NO increased in the jejunum in G72 and ileum in G24, G48 and G72. Our study demonstrated that T. gondii initiates the infection precociously (at 6 hours) leading to a systemic activation of innate immune response resulting in mild inflammation in a less susceptible experimental model.
Editor: United States: Public Library of Science
Idioma: Inglês

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Immunocompetent host develops mild intestinal inflammation in acute infection with Toxoplasma gondii

United States: Public Library of Science

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