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2015 ; 9
(9
): e0004037
Nephropedia Template TP
gab.com Text
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English Wikipedia
Neutrophil Extracellular Traps Identification in Tegumentary Lesions of Patients
with Paracoccidioidomycosis and Different Patterns of NETs Generation In Vitro
#MMPMID26327485
Della Coletta AM
; Bachiega TF
; de Quaglia e Silva JC
; Soares ÂM
; De Faveri J
; Marques SA
; Marques ME
; Ximenes VF
; Dias-Melicio LA
PLoS Negl Trop Dis
2015[]; 9
(9
): e0004037
PMID26327485
show ga
Paracoccidioidomycosis (PCM) is a systemic mycosis, endemic in most Latin
American countries, especially in Brazil. It is caused by the thermo-dimorphic
fungus of the genus Paracoccidioides (Paracoccidioides brasiliensis and
Paracoccidioides lutzii). Innate immune response plays a crucial role in host
defense against fungal infections, and neutrophils (PMNs) are able to combat
microorganisms with three different mechanisms: phagocytosis, secretion of
granular proteins, which have antimicrobial properties, and the most recent
described mechanism called NETosis. This new process is characterized by the
release of net-like structures called Neutrophil Extracellular Traps (NETs),
which is composed of nuclear (decondensed DNA and histones) and granular material
such as elastase. Several microorganisms have the ability of inducing NETs
formation, including gram-positive and gram-negative bacteria, viruses and some
fungi. We proposed to identify NETs in tegumentary lesions of patients with PCM
and to analyze the interaction between two strains of P. brasiliensis and human
PMNs by NETs formation in vitro. In this context, the presence of NETs in vivo
was evidenced in tegumentary lesions of patients with PCM by confocal spectrum
analyzer. Furthermore, we showed that the high virulent P. brasiliensis strain 18
(Pb18) and the lower virulent strain Pb265 are able to induce different patterns
of NETs formation in vitro. The quantification of extracellular DNA corroborates
the idea of the ability of P. brasiliensis in inducing NETs release. In
conclusion, our data show for the first time the identification of NETs in
lesions of patients with PCM and demonstrate distinct patterns of NETs in
cultures challenged with fungi in vitro. The presence of NETs components both in
vivo and in vitro open new possibilities for the detailed investigation of
immunity in PCM.