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2018 ; 8
(1
): 6737
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Sauchinone controls hepatic cholesterol homeostasis by the negative regulation of
PCSK9 transcriptional network
#MMPMID29712938
Chae HS
; You BH
; Kim DY
; Lee H
; Ko HW
; Ko HJ
; Choi YH
; Choi SS
; Chin YW
Sci Rep
2018[Apr]; 8
(1
): 6737
PMID29712938
show ga
Whole-transcriptome analysis and western blotting of sauchinone-treated HepG2
cells demonstrated that sauchinone regulated genes relevant to cholesterol
metabolism and synthesis. In particular, it was found that the expression of
proprotein convertase subtilisin/kexin type 9 (PCSK9) was downregulated, and the
expression of low density lipoprotein receptor (LDLR) was upregulated in
sauchinone-treated HepG2 cells. Consequently, LDL-cholesterol (LDL-C) uptake was
increased. As a transcriptional regulator of PCSK9 expression, sterol regulatory
elements binding protein-2 (SREBP-2) was proposed by transcriptome analysis and
western blotting. Oral administration of sauchinone increased hepatic LDLR
through PCSK9 inhibition in obese mice and showed the reduced serum LDL-C levels
and downstream targets of SREBP-2. Thus, it is evident that sauchinone reduces
hepatic steatosis by downregulating the expression of hepatic PCSK9 via SREBP-2.