Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\26496711
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+Negl+Trop+Dis
2015 ; 9
(10
): e0004145
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
M2 Polarization of Monocytes-Macrophages Is a Hallmark of Indian Post Kala-Azar
Dermal Leishmaniasis
#MMPMID26496711
Mukhopadhyay D
; Mukherjee S
; Roy S
; Dalton JE
; Kundu S
; Sarkar A
; Das NK
; Kaye PM
; Chatterjee M
PLoS Negl Trop Dis
2015[Oct]; 9
(10
): e0004145
PMID26496711
show ga
The high level of functional diversity and plasticity in monocytes/macrophages
has been defined within in vitro systems as M1 (classically activated), M2
(alternatively activated) and deactivated macrophages, of which the latter two
subtypes are associated with suppression of cell mediated immunity, that confers
susceptibility to intracellular infection. Although the Leishmania parasite
modulates macrophage functions to ensure its survival, what remains an unanswered
yet pertinent question is whether these macrophages are deactivated or
alternatively activated. This study aimed to characterize the functional
plasticity and polarization of monocytes/macrophages and delineate their
importance in the immunopathogenesis of Post kala-azar dermal leishmaniasis
(PKDL), a chronic dermatosis of human leishmaniasis. Monocytes from PKDL patients
showed a decreased expression of TLR-2/4, along with an attenuated generation of
reactive oxidative/nitrosative species. At disease presentation, an increased
mRNA expression of classical M2 markers CD206, ARG1 and PPARG in monocytes and
lesional macrophages indicated M2 polarization of macrophages which was
corroborated by increased expression of CD206 and arginase-1. Furthermore,
altered vitamin D signaling was a key feature in PKDL, as disease presentation
was associated with raised plasma levels of monohydroxylated vitamin D3 and
vitamin D3- associated genes, features of M2 polarization. Taken together, in
PKDL, monocyte/macrophage subsets appear to be alternatively activated, a
phenotype that might sustain disease chronicity. Importantly, repolarization of
these monocytes to M1 by antileishmanial drugs suggests that switching from M2 to
M1 phenotype might represent a therapeutic opportunity, worthy of future
pharmacological consideration.