Abstract
LXRα agonists have attracted significant attention due to their potential biological activities on promoting cholesterol efflux. This study was designed to investigate whether setosphapyrone C and D have potential lipid-lowering capacity and the underlying mechanisms in vitro. Our data showed that setosphapyrone C and D had weak cytotoxicity compared to the liver X receptor α (LXRα) agonist T0901317. In RAW 264.7 macrophages, setosphapyrone C and D significantly enhanced [3H]-cholesterol efflux by ~ 21.3% and 32.4%, respectively; furthermore, setosphapyrone C and D enhanced the protein levels of ATP-binding cassette transporter (ABC) A1 and LXRα by 58% and 69%, and 60% and 70% (8 µM), respectively; however, they had no effect on the protein levels of ABCG1 and scavenger receptor B type 1; additionally, they had minor effect on the mRNA expression of lipogenic genes. Of note, setosphapyrone C and D significantly enhanced LXRα/ABCA1pathway in mice primary macrophages. In BRL cells, setosphapyrone C and D significantly improved the protein levels of ABCA1 and ABCG1; setosphapyrone D significantly enhanced the protein expression of low-density lipoprotein. Collectively, setosphapyrone C and D with weak cytotoxicity exhibited effective lipid-lowering effect via enhancing LXRα/ABC pathways. Setosphapyrones possess potential application for the treatment of hyperlipidemic diseases.
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Acknowledgements
This work was supported by Natural Science Foundation of China (81770463, 31300639), Shandong Provincial Natural Science Fund (ZR2013HQ014), Medicine & Health Scientific Technology Development Program of Shandong Province (2018WS064), and Study Abroad Fund of Weifang Medical University. We thank Guanghai Zhou at Shandong First Medical University & Shandong Academy of Medical Sciences for providing help in performing the isotope tracing assay.
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Li, T., Yin, J., Ji, Y. et al. Setosphapyrone C and D accelerate macrophages cholesterol efflux by promoting LXRα/ABCA1 pathway. Arch. Pharm. Res. 43, 788–797 (2020). https://doi.org/10.1007/s12272-020-01255-w
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DOI: https://doi.org/10.1007/s12272-020-01255-w