Korean J Parasitol.  2013 Feb;51(1):133-137. 10.3347/kjp.2013.51.1.133.

Increased Cytokine and Nitric Oxide Levels in Serum of Dogs Experimentally Infected with Rangelia vitalii

• Paim FC
• Da Silva A
• Paim CB
• Franca RT
• Costa MM
• Duarte MM
• Sangoi MB
• Moresco RN
• Monteiro S
• Lopes ST

• KMID: 1501822
• DOI: http://doi.org/10.3347/kjp.2013.51.1.133

Abstract

This study aimed to measure the levels of interferon-gamma (IFN-gamma), tumor necrosis factor-alpha (TNF-alpha), interleukin 1 (IL-1), interleukin 6 (IL-6), and nitrite/nitrate (NOx) in serum of dogs experimentally infected with Rangelia vitalii. Twelve female mongrel dogs were divided into 2 groups; group A (uninfected controls) composed by healthy dogs (n=5) and group B consisting of dogs inoculated with R. vitalii (n=7). Animals were monitored by blood smear examinations, which showed intraerythrocytic forms of the parasite on day 5 post-infection (PI). Blood samples were collected through the jugular vein on days 0, 10, and 20 PI to determine the serum levels of IFN-gamma, TNF-alpha, IL-1, IL-6, and NOx. Cytokines were assessed by ELISA quantitative sandwich technique, and NOx was measured by the modified Griess method. Cytokine levels (IFN-gamma, TNF-alpha, IL-1, and IL-6) were increased (P<0.01) in serum of infected animals. Serum levels of NOx were also increased on days 10 PI (P<0.01) and 20 PI (P<0.05) in infected animals. Therefore, the infection with R. vitalii causes an increase in proinflammatory cytokines and nitric oxide content. These alterations may be associated with host immune protection against the parasite.

Keyword

Rangelia vitalii; IFN-gamma; TNF-alpha; IL-1; IL-6; nitric oxide; immunity; rangeliosis

MeSH Terms

Animals
Chemistry Techniques, Analytical
Cytokines/*blood
Disease Models, Animal
Dogs
Enzyme-Linked Immunosorbent Assay
Female
Nitric Oxide/*blood
Piroplasmida/*immunology
Protozoan Infections/*immunology/parasitology/pathology
Serum/chemistry
Cytokines
Nitric Oxide