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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Arthritis+Res+Ther
2018 ; 20
(1
): 64
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Dysregulated heme oxygenase-1(low) M2-like macrophages augment lupus nephritis
via Bach1 induced by type I interferons
#MMPMID29636091
Kishimoto D
; Kirino Y
; Tamura M
; Takeno M
; Kunishita Y
; Takase-Minegishi K
; Nakano H
; Kato I
; Nagahama K
; Yoshimi R
; Igarashi K
; Aoki I
; Nakajima H
Arthritis Res Ther
2018[Apr]; 20
(1
): 64
PMID29636091
show ga
BACKGROUND: Innate immunity including macrophages (M?) in lupus nephritis (LN)
has been gaining attention, but roles of M? in LN remain uncertain. METHODS:
Immunohistochemical staining was performed to determine CD68, CD163, heme
oxygenase (HO)-1 (a stress-inducible heme-degrading enzyme with anti-inflammatory
property), pSTAT1, and CMAF-expressing M? in the glomeruli of patients with LN.
Effects of type I interferons on the expression levels of CD163, HO-1, BTB and
CNC homology 1 (Bach1; a transcriptional HO-1 repressor), interleukin (IL)-6, and
IL-10 by human M2-like M?, which were differentiated in vitro from peripheral
monocytes with macrophage colony-stimulating factor, were assessed by RT-PCR and
immunocytostaining. Clinical manifestations, anti-double-stranded DNA
(anti-dsDNA), and local HO-1 expression were compared in Bach1-deficient and
wild-type MRL/lpr mice. RESULTS: The number of glomerular M2-like M? correlated
with the amounts of proteinuria in patients with LN. Unlike monocyte-derived
M2-like M?, HO-1 expression was defective in the majority of glomerular M2-like
M? of patients with LN. Stimulation of human M2-like M? with type I interferons
led to reduced HO-1 expression and increased Bach1 and IL-6 expression.
Bach1-deficient MRL/lpr mice exhibited increased HO-1 expression in kidneys,
prolonged survival, reduced urine proteins, and serum blood urea nitrogen levels,
but serum anti-dsDNA antibody levels were comparable. Increased expression of
CD163 and HO-1 was found in peritoneal M? from Bach1-deficient MRL/lpr mice.
CONCLUSIONS: Our data suggest that dysregulated M2-like M? play a proinflammatory
role in LN. Bach1 is a potential therapeutic target that could restore the
anti-inflammatory property of M2 M?.