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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+Immunol
2016 ; 196
(7
): 3135-47
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Human SR-BI and SR-BII Potentiate Lipopolysaccharide-Induced Inflammation and
Acute Liver and Kidney Injury in Mice
#MMPMID26936883
Baranova IN
; Souza AC
; Bocharov AV
; Vishnyakova TG
; Hu X
; Vaisman BL
; Amar MJ
; Chen Z
; Kost Y
; Remaley AT
; Patterson AP
; Yuen PS
; Star RA
; Eggerman TL
J Immunol
2016[Apr]; 196
(7
): 3135-47
PMID26936883
show ga
The class B scavenger receptors BI (SR-BI) and BII (SR-BII) are high-density
lipoprotein receptors that recognize various pathogens, including bacteria and
their products. It has been reported that SR-BI/II null mice are more sensitive
than normal mice to endotoxin-induced inflammation and sepsis. Because the
SR-BI/II knockout model demonstrates multiple immune and metabolic disorders, we
investigated the role of each receptor in the LPS-induced inflammatory response
and tissue damage using transgenic mice with pLiv-11-directed expression of human
SR-BI (hSR-BI) or human SR-BII (hSR-BII). At 6 h after i.p. LPS injection,
transgenic hSR-BI and hSR-BII mice demonstrated markedly higher serum levels of
proinflammatory cytokines and 2- to 3-fold increased expression levels of
inflammatory mediators in the liver and kidney, compared with wild-type (WT)
mice. LPS-stimulated inducible NO synthase expression was 3- to 6-fold higher in
the liver and kidney of both transgenic strains, although serum NO levels were
similar in all mice. Despite the lower high-density lipoprotein plasma levels,
both transgenic strains responded to LPS by a 5-fold increase of plasma
corticosterone levels, which were only moderately lower than in WT animals. LPS
treatment resulted in MAPK activation in tissues of all mice; however, the
strongest response was detected for hepatic extracellular signal-regulated
protein kinase 1 and 2 and kidney JNK of both transgenic mice. Histological
examination of hepatic and renal tissue from LPS-challenged mice revealed more
injury in hSR-BII, but not hSR-BI, transgenic mice versus WT controls. Our
findings demonstrate that hSR-BII, and to a lesser extent hSR-BI, significantly
increase LPS-induced inflammation and contribute to LPS-induced tissue injury in
the liver and kidney, two major organs susceptible to LPS toxicity.