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2018 ; 12
(4
): 449-456
Nephropedia Template TP
gab.com Text
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Expression of Fibroblast Growth Factor 21 and ?-Klotho Regulates Hepatic Fibrosis
through the Nuclear Factor-?B and c-Jun N-Terminal Kinase Pathways
#MMPMID29699061
Lee KJ
; Jang YO
; Cha SK
; Kim MY
; Park KS
; Eom YW
; Baik SK
Gut Liver
2018[Jul]; 12
(4
): 449-456
PMID29699061
show ga
BACKGROUND/AIMS: Fibroblast growth factor (FGF) 21 is associated with hepatic
inflammation and fibrosis. However, little is known regarding the effects of
inflammation and fibrosis on the ?-Klotho and FGF21 pathway in the liver.
METHODS: Enrolled patients had biopsy-confirmed viral or alcoholic hepatitis.
FGF19, FGF21 and ?-Klotho levels were evaluated using enzyme-linked immunosorbent
assay, real-time polymerase chain reaction, and Western blotting. Furthermore, we
explored the underlying mechanisms for this process by evaluating nuclear
factor-?B (NF-?B) and c-Jun N-terminal kinase (JNK) pathway involvement in Huh-7
cells. RESULTS: We observed that the FGF19 and FGF21 serum and mRNA levels in the
biopsied liver tissue gradually increased and were correlated with fibrosis
stage. Inflammatory markers (interleukin 1? [IL-1?], IL-6, and tumor necrosis
factor-?) were positively correlated, while ?-Klotho expression was negatively
correlated with the degree of fibrosis. In Huh-7 cells, IL-1? increased FGF21
levels and decreased ?-Klotho levels. NF-?B and JNK inhibitors abolished the
effect of IL-1? on both FGF21 and ?-Klotho expression. FGF21 protected
IL-1?-induced growth retardation in Huh-7 cells. CONCLUSIONS: These results
indicate that the inflammatory response during fibrogenesis increases FGF21
levels and suppresses ?-Klotho via the NF-?B and JNK pathway. In addition, FGF21
likely protects hepatocytes from hepatic inflammation and fibrosis.