TY - JOUR
T1 - Role of endothelin receptors in the control of central nervous system parasitism in Trypanosoma cruzi infection in rats
AU - Rachid, Milene A.
AU - Teixeira, Antônio L.
AU - Barcelos, Lucíola S.
AU - Machado, Conceição R.S.
AU - Chiari, Egler
AU - Tanowitz, Herbert B.
AU - Camargos, Elizabeth R.S.
AU - Teixeira, Mauro M.
N1 - Funding Information:
Supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Fundação de Amparo a Pesquisa de Minas Gerais (Fapemig), and NIH Grants ( AI-076248 ).
PY - 2010/3/30
Y1 - 2010/3/30
N2 - Endothelin has been implicated in the pathogenesis of experimental and human Chagas disease. In the present study, we investigated whether the treatment with bosentan, an antagonist of both ETA/ETB endothelin receptors, modified parasite load and inflammation in the central nervous system (CNS) of Trypanosoma cruzi-infected rats. The cerebellum was the most affected region in the CNS with marked parasitism and inflammation. Treatment with bosentan enhanced parasitemia and CNS parasitism, but control of infection was eventually attained. There was also an increase in the levels of the cytokines TNF-α, IL-10, IFN-γ, CCL2/MCP-1, CCL3/MIP-1α and CCL5/RANTES in the brain of infected animals at days 9, 13 and 18 after infection. Overall, bosentan has some effects on the expression of certain cytokines and this may be related to the initial enhanced parasite load. Altogether, our data suggest that endothelin action via ETA and ETB receptors may play a role in the initial resistance of the CNS to T. cruzi infection in rats.
AB - Endothelin has been implicated in the pathogenesis of experimental and human Chagas disease. In the present study, we investigated whether the treatment with bosentan, an antagonist of both ETA/ETB endothelin receptors, modified parasite load and inflammation in the central nervous system (CNS) of Trypanosoma cruzi-infected rats. The cerebellum was the most affected region in the CNS with marked parasitism and inflammation. Treatment with bosentan enhanced parasitemia and CNS parasitism, but control of infection was eventually attained. There was also an increase in the levels of the cytokines TNF-α, IL-10, IFN-γ, CCL2/MCP-1, CCL3/MIP-1α and CCL5/RANTES in the brain of infected animals at days 9, 13 and 18 after infection. Overall, bosentan has some effects on the expression of certain cytokines and this may be related to the initial enhanced parasite load. Altogether, our data suggest that endothelin action via ETA and ETB receptors may play a role in the initial resistance of the CNS to T. cruzi infection in rats.
KW - Central nervous system
KW - Chagas disease
KW - Chemokines
KW - Endothelin
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UR - http://www.scopus.com/inward/citedby.url?scp=77649193422&partnerID=8YFLogxK
U2 - 10.1016/j.jneuroim.2010.01.008
DO - 10.1016/j.jneuroim.2010.01.008
M3 - Article
C2 - 20116865
AN - SCOPUS:77649193422
SN - 0165-5728
VL - 220
SP - 64
EP - 68
JO - Journal of Neuroimmunology
JF - Journal of Neuroimmunology
IS - 1-2
ER -
