Abstract:
:The functions of phagocytic cells against pathogens are initiated by the interaction between membrane receptors and molecular structures which compose the cell wall of these microorganisms. Thus our study aimed to identify the neutrophil receptors involved in the recognition of different strains of Paracoccidioides brasiliensis and the consequent modulation of immune response through the production of cytokines and inflammatory mediators. Neutrophils did not produce TNF-alfa in response to both strains. However, these cells produce IL-12, mainly in response to Pb 265, with participation of TLR2 and dectin-1. These cells also produce L-10, whose levels were higher for Pb 18 with involvement of TLR2 and MR and only TLR2 for Pb 265. The production of PGE2 and LTB4 was detected similarly for the two strains. For PGE2, MR and dectin-1 were involved, while in relation to LTB4, none of them. In summary, we demonstrated that neutrophils have a dynamic role during host immune response to P. brasiliensis, since in addition to their role as effector cells of innate immunity; they have the capacity to modulate innate and adaptative immune response against this fungus by producing cytokines and lipidic mediators. This modulation may be toward a pró- or anti-inflammatory pattern in a dependence of P. brasiliensis strains and PRR involved in fungus recognition by these cells.
journal_name
Cytokinejournal_title
Cytokineauthors
Balderramas HA,Penitenti M,Rodrigues DR,Bachiega TF,Fernandes RK,Ikoma MR,Dias-Melicio LA,Oliveira SL,Soares ÂMdoi
10.1016/j.cyto.2014.02.004subject
Has Abstractpub_date
2014-05-01 00:00:00pages
36-43issue
1eissn
1043-4666issn
1096-0023pii
S1043-4666(14)00046-5journal_volume
67pub_type
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