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2014 ; 20
(3
): 512-25
Nephropedia Template TP
gab.com Text
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English Wikipedia
The PPAR?-FGF21 hormone axis contributes to metabolic regulation by the hepatic
JNK signaling pathway
#MMPMID25043817
Vernia S
; Cavanagh-Kyros J
; Garcia-Haro L
; Sabio G
; Barrett T
; Jung DY
; Kim JK
; Xu J
; Shulha HP
; Garber M
; Gao G
; Davis RJ
Cell Metab
2014[Sep]; 20
(3
): 512-25
PMID25043817
show ga
The cJun NH2-terminal kinase (JNK) stress signaling pathway is implicated in the
metabolic response to the consumption of a high-fat diet, including the
development of obesity and insulin resistance. These metabolic adaptations
involve altered liver function. Here, we demonstrate that hepatic JNK potently
represses the nuclear hormone receptor peroxisome proliferator-activated receptor
? (PPAR?). Therefore, JNK causes decreased expression of PPAR? target genes that
increase fatty acid oxidation and ketogenesis and promote the development of
insulin resistance. We show that the PPAR? target gene fibroblast growth factor
21 (Fgf21) plays a key role in this response because disruption of the hepatic
PPAR?-FGF21 hormone axis suppresses the metabolic effects of JNK deficiency. This
analysis identifies the hepatokine FGF21 as a critical mediator of JNK signaling
in the liver.