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2016 ; 90
(5
): 985-996
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Fibroblast growth factor 23 directly targets hepatocytes to promote inflammation
in chronic kidney disease
#MMPMID27457912
Singh S
; Grabner A
; Yanucil C
; Schramm K
; Czaya B
; Krick S
; Czaja MJ
; Bartz R
; Abraham R
; Di Marco GS
; Brand M
; Wolf M
; Faul C
Kidney Int
2016[Nov]; 90
(5
): 985-996
PMID27457912
show ga
Patients with chronic kidney disease (CKD) develop increased levels of the
phosphate-regulating hormone, fibroblast growth factor (FGF) 23, that are
associated with a higher risk of mortality. Increases in inflammatory markers are
another common feature that predicts poor clinical outcomes. Elevated FGF23 is
associated with higher circulating levels of inflammatory cytokines in CKD, which
can stimulate osteocyte production of FGF23. Here, we studied whether FGF23 can
directly stimulate hepatic production of inflammatory cytokines in the absence of
?-klotho, an FGF23 coreceptor in the kidney that is not expressed by hepatocytes.
By activating FGF receptor isoform 4 (FGFR4), FGF23 stimulated calcineurin
signaling in cultured hepatocytes, which increased the expression and secretion
of inflammatory cytokines, including C-reactive protein. Elevating serum FGF23
levels increased hepatic and circulating levels of C-reactive protein in
wild-type mice, but not in FGFR4 knockout mice. Administration of an
isoform-specific FGFR4 blocking antibody reduced hepatic and circulating levels
of C-reactive protein in the 5/6 nephrectomy rat model of CKD. Thus, FGF23 can
directly stimulate hepatic secretion of inflammatory cytokines. Our findings
indicate a novel mechanism of chronic inflammation in patients with CKD and
suggest that FGFR4 blockade might have therapeutic anti-inflammatory effects in
CKD.
|Animals
[MESH]
|Calcineurin/metabolism
[MESH]
|Cytokines/*metabolism
[MESH]
|Fibroblast Growth Factor-23
[MESH]
|Fibroblast Growth Factors/*metabolism
[MESH]
|Glucuronidase/metabolism
[MESH]
|Hepatocytes/*metabolism
[MESH]
|Humans
[MESH]
|Inflammation/*metabolism
[MESH]
|Klotho Proteins
[MESH]
|Mice
[MESH]
|NFATC Transcription Factors/metabolism
[MESH]
|Phospholipase C gamma/metabolism
[MESH]
|Primary Cell Culture
[MESH]
|Rats
[MESH]
|Receptor, Fibroblast Growth Factor, Type 4/metabolism
[MESH]