Abstract:
:Hepatic nuclear factor 4 alpha (HNF4α) drives the expression of apolipoprotein B (ApoB), microsomal triglyceride transfer protein (MTP) and phospholipase A2 G12B (PLA2G12B), governing hepatic very-low-density lipoprotein (VLDL) production and secretion. Andrographolide (AP) is a major constituent isolated from Andrographis paniculata. We found that AP can disrupt the interaction between HNF4α and its coactivator peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α). Virtual docking and mutational analysis indicated that arginine 235 of HNF4α is essential for binding to AP. As a consequence of antagonizing the activity of HNF4α, AP suppresses the expression of ApoB, MTP and PLA2G12B and reduces the rate of hepatic VLDL secretion in vivo. AP additionally reduced gluconeogenesis via down-regulating the expression of HNF4α target genes phosphoenolpyruvate carboxykinase (Pepck) and glucose-6-phosphatase (G6pc). Collectively, our results suggest that AP affects liver function via modulating the transcriptional activity of HNF4α.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Zhang M,Yang M,Wang N,Liu Q,Wang B,Huang T,Tong Y,Ming Y,Wong CW,Liu J,Yao D,Guan Mdoi
10.1016/j.mce.2020.110867subject
Has Abstractpub_date
2020-08-01 00:00:00pages
110867eissn
0303-7207issn
1872-8057pii
S0303-7207(20)30167-2journal_volume
513pub_type
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