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2014 ; 209
(8
): 1288-96
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
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English Wikipedia
Human classical monocytes control the intracellular stage of Leishmania
braziliensis by reactive oxygen species
#MMPMID24403561
Novais FO
; Nguyen BT
; Beiting DP
; Carvalho LP
; Glennie ND
; Passos S
; Carvalho EM
; Scott P
J Infect Dis
2014[Apr]; 209
(8
): 1288-96
PMID24403561
show ga
Leishmania braziliensis are intracellular parasites that cause unique clinical
forms of cutaneous leishmaniasis. Previous studies with other leishmania species
demonstrated that reactive oxygen species (ROS) control promastigotes, the
infective stage of the parasite, but not the amastigote form that exists in the
mammalian host. Here we show that ROS inhibits growth of L. braziliensis
amastigotes in resting monocytes, and that classical monocytes are primarily
responsible for this control. ROS, but not nitric oxide, also contributed to
killing of L. braziliensis by IFN-? activated monocytes. Furthermore, by gene
expression profiling of human lesions we found greater expression of genes
associated with ROS, but not nitric oxide, compared to normal skin. This study
shows that ROS are important for control of L. braziliensis both at the initial
stages of infection, as well as at later time points, and highlights that
monocyte subsets may play different roles during leishmaniasis.
|Animals
[MESH]
|Flow Cytometry
[MESH]
|Gene Expression Profiling
[MESH]
|Humans
[MESH]
|Leishmania braziliensis/*physiology
[MESH]
|Leishmaniasis, Cutaneous/metabolism/*prevention & control
[MESH]