Abstract:
:Lipoprotein(a) [Lp(a)] is a highly atherogenic lipoprotein, whose metabolism is poorly understood. Efficient and secure drugs that can lower elevated plasma Lp(a) concentrations are currently lacking. Fibroblast growth factor-21 (FGF-21), a member of the FGFS super family, regulates glucose and lipid metabolism in hepatocytes and adipocytes via FGFR-ERK1/2 signaling. In this study, we investigated the molecular mechanisms that influence apolipoprotein(a) [apo(a)] biosynthesis. We also determined the effects of FGF21 on HepG2 cell apo(a) expression and secretion, as well as the mechanism of FGF21 in these effects. Results showed that FGF21 inhibited apo(a) expression at both mRNA and protein levels in a dose- and time--dependent manner and then suppressed the secretion of apo(a). These effects were attenuated by PD98059 (ERK1/2 inhibitor) and Elk-1 siRNA. PD166866 (FGFR1 inhibitor) also attenuated the FGF21-mediated inhibition of apo(a) expression and inhibited ERK1/2 and Elk-1 activation. These results demonstrate that FGF21 suppresses apo(a) expression via the FGFR1-ERK1/2-Elk-1 pathway.
journal_name
Mol Cell Biochemjournal_title
Molecular and cellular biochemistryauthors
Lin X,Li G,He X,Ma X,Zhang K,Zhang H,Zeng G,Wang Zdoi
10.1007/s11010-014-2044-0subject
Has Abstractpub_date
2014-08-01 00:00:00pages
33-42issue
1-2eissn
0300-8177issn
1573-4919journal_volume
393pub_type
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