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2015 ; 13
(9
): 1909-1921
Nephropedia Template TP
gab.com Text
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English Wikipedia
Dectin-1 Regulates Hepatic Fibrosis and Hepatocarcinogenesis by Suppressing TLR4
Signaling Pathways
#MMPMID26655905
Seifert L
; Deutsch M
; Alothman S
; Alqunaibit D
; Werba G
; Pansari M
; Pergamo M
; Ochi A
; Torres-Hernandez A
; Levie E
; Tippens D
; Greco SH
; Tiwari S
; Ly NNG
; Eisenthal A
; van Heerden E
; Avanzi A
; Barilla R
; Zambirinis CP
; Rendon M
; Daley D
; Pachter HL
; Hajdu C
; Miller G
Cell Rep
2015[Dec]; 13
(9
): 1909-1921
PMID26655905
show ga
Dectin-1 is a C-type lectin receptor critical in anti-fungal immunity, but
Dectin-1 has not been linked to regulation of sterile inflammation or
oncogenesis. We found that Dectin-1 expression is upregulated in hepatic fibrosis
and liver cancer. However, Dectin-1 deletion exacerbates liver fibro-inflammatory
disease and accelerates hepatocarcinogenesis. Mechanistically, we found that
Dectin-1 protects against chronic liver disease by suppressing TLR4 signaling in
hepatic inflammatory and stellate cells. Accordingly, Dectin-1(-/-) mice
exhibited augmented cytokine production and reduced survival in
lipopolysaccharide (LPS)-mediated sepsis, whereas Dectin-1 activation was
protective. We showed that Dectin-1 inhibits TLR4 signaling by mitigating TLR4
and CD14 expression, which are regulated by Dectin-1-dependent macrophage colony
stimulating factor (M-CSF) expression. Our study suggests that Dectin-1 is an
attractive target for experimental therapeutics in hepatic fibrosis and
neoplastic transformation. More broadly, our work deciphers critical cross-talk
between pattern recognition receptors and implicates a role for Dectin-1 in
suppression of sterile inflammation, inflammation-induced oncogenesis, and
LPS-mediated sepsis.