Article
Inflammatory mediators from monocytes down-regulate cellular proliferation and enhance cytokines production in patients with polar clinical forms of Chagas disease
Registro en:
GOMES, Juliana Assis Silva et al. Inflammatory mediators from monocytes down-regulate cellular proliferation and enhance cytokines production in patients with polar clinical forms of Chagas disease. Hum Immunol. , vol. 75, n. 1, p. 20-8, 2014
0198-8859
10.1016/j.humimm.2013.09.009
Autor
Gomes, Juliana Assis Silva
Molica, Andreia Maria
Keesen, Tatjana Souza Lima
Morato, Maria José Ferreira
Araujo, Fernanda Fortes de
Fares, Rafaelle Christine Gomes
Fiuza, Jacqueline Araujo
Chaves, Ana Thereza
Pinheiro, Vladimir
Nunes, Maria do Carmo Pereira
Oliveira, Rodrigo Correa de
Rocha, Manoel Otávio da Costa
Resumen
Exposure to Trypanosoma cruzi parasites induces monocytes and macrophages to produce various endogenous mediators, including prostaglandins and cytokines. To clarify the involvement of monocytes as an important source of inflammatory mediators in Chagas disease patients, we evaluated PBMC before and after depletion of adherent cells (monocytes) from patients with indeterminate (IND) and cardiac (CARD) clinical forms and from non-infected individuals (NI). We demonstrated that after the partial depletion of adherent cells, production of PGE2 was slightly decreased in patients with Chagas disease. Inhibition of the cells by indomethacin increased the proliferation in PBMC cells from patients after antigen stimulation. Pro-inflammatory cytokines as IL-2 and IFN-γ also had a greater decrease after partial depletion of adherent cells in both clinical forms of Chagas disease. IL-10 and IL-5 levels were also reduced after partial depletion of adherent cells both in IND and CARD patients. In addition, we evaluated the APC potential of B cells and observed that the MHCII and CD80 molecules had an increased expression after partial depletion of most monocytes in all groups. Thus, inflammatory mediators produced by monocytes seem to be important to modulate immune responses in Chagas disease by regulating the processes of inflammation and antigen presentation.