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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 J+Am+Soc+Nephrol
2015 ; 26
(4
): 896-906
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Vascular-resident CD169-positive monocytes and macrophages control neutrophil
accumulation in the kidney with ischemia-reperfusion injury
#MMPMID25266072
Karasawa K
; Asano K
; Moriyama S
; Ushiki M
; Monya M
; Iida M
; Kuboki E
; Yagita H
; Uchida K
; Nitta K
; Tanaka M
J Am Soc Nephrol
2015[Apr]; 26
(4
): 896-906
PMID25266072
show ga
Monocytes and kidney-resident macrophages are considered to be involved in the
pathogenesis of renal ischemia-reperfusion injury (IRI). Several subsets of
monocytes and macrophages are localized in the injured tissue, but the pathologic
roles of these cells are not fully understood. Here, we show that CD169(+)
monocytes and macrophages have a critical role in preventing excessive
inflammation in IRI by downregulating intercellular adhesion molecule-1 (ICAM-1)
expression on vascular endothelial cells. Mice depleted of CD169(+) cells showed
enhanced endothelial ICAM-1 expression and developed irreversible renal damage
associated with infiltration of a large number of neutrophils. The perivascular
localization of CD169(+) monocytes and macrophages indicated direct interaction
with blood vessels, and coculture experiments showed that the direct interaction
of CD169(+) cell-depleted peripheral blood leukocytes augments the expression
levels of ICAM-1 on endothelial cells. Notably, the transfer of Ly6C(lo)
monocytes into CD169(+) cell-depleted mice rescued the mice from lethal renal
injury and normalized renal ICAM-1 expression levels, indicating that the
Ly6C(lo) subset of CD169(+) monocytes has a major role in the regulation of
inflammation. Our findings highlight the previously unknown role of CD169(+)
monocytes and macrophages in the maintenance of vascular homeostasis and provide
new approaches to the treatment of renal IRI.