[In vitro effect and mechanistic study of compound E23869 on lipid metabolism]

Yao Xue Xue Bao. 2016 Apr;51(4):563-72.
[Article in Chinese]

Abstract

This study was designed to identify inducers of ATP-binding cassette transporter A1(ABCA1) and CD36 and lysosomal integral membrane protein-II analogous-1(CLA-1) and to evaluate the in vitro effect of the active compound on lipid metabolism. Among 20 000 compounds screened, E23869 was found as a positive hit using cell-based high throughput screening models. The up-regulating activities of E23869 in ABCA1p-LUC and CLA-1p-LUC Hep G2 cells were 196% and 198%, respectively. The EC(50) values of E23869 in ABCA1p- LUC and CLA-1p-LUC Hep G2 cells were 0.25 μmol·L(-1) and 0.66 μmol·L(-1), respectively. E23869 significantly upregulated the protein levels of ABCA1, scavenger receptor class B type I(SR-BI)/CLA-1 and ATP-binding cassette transporter G1(ABCG1) in both macrophages RAW264.7 and L02 cells by Western blotting analysis. Foam cell assay showed that E23869 inhibited lipids accumulations in macrophages RAW264.7. Cholesterol efflux assay showed that E23869 induced HDL-mediated cholesterol efflux in macrophages RAW264.7. Moreover, E23869 up-regulated ABCA1, SR-BI/CLA-1 and ABCG1 expressions through activation of PPARα and PPARγ. In addition, E23869 weakly promoted in vitro differentiation of mouse preadipocytes 3T3-L1. In conclusion, E23869 up-regulated ABCA1, SR-BI/CLA-1 and ABCG1 expressions to promote cholesterol efflux, which is a good leading compound for regulation of lipid metabolism.

MeSH terms

  • ATP Binding Cassette Transporter 1 / metabolism*
  • ATP Binding Cassette Transporter, Subfamily G, Member 1 / metabolism*
  • Animals
  • Biological Transport
  • CD36 Antigens
  • Cell Line
  • Cholesterol / metabolism
  • Foam Cells / drug effects
  • Hep G2 Cells
  • Humans
  • Lipid Metabolism / drug effects*
  • Macrophages / drug effects
  • Mice
  • PPAR alpha / metabolism
  • PPAR gamma / metabolism
  • RAW 264.7 Cells
  • Scavenger Receptors, Class B / metabolism*
  • Transcriptional Activation
  • Up-Regulation

Substances

  • ABCA1 protein, human
  • ABCA1 protein, mouse
  • ABCG1 protein, mouse
  • ATP Binding Cassette Transporter 1
  • ATP Binding Cassette Transporter, Subfamily G, Member 1
  • CD36 Antigens
  • PPAR alpha
  • PPAR gamma
  • Scarb1 protein, mouse
  • Scavenger Receptors, Class B
  • Cholesterol