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    標題: The Cholesterol-Modulating Effect of Methanol Extract of Pigeon Pea (Cajanus cajan (L.) Millsp.) Leaves on Regulating LDLR and PCSK9 Expression in HepG2 Cells
    作者: Chang, Heng-Yuan
    Wu, Jia-Ru
    Gao, Wan-Yun
    Lin, Huei-Ru
    Chen, Pei-Yi
    Chen, Chen-I
    Ming-Jiuan Wu(吳明娟)
    Yen, Jui-Hung
    貢獻者: Tzu Chi Univ, Sch Postbaccalaureate Chinese Med
    Tzu Chi Univ, Dept Mol Biol & Human Genet
    Tzu Chi Univ, Dept Lab Med & Biotechnol
    Buddhist Tzu Chi Gen Hosp, Ctr Med Genet
    Taitung Dist Agr Res & Extens Stn, Crop Improvement Dept
    Chia Nan Univ Pharm & Sci, Dept Biotechnol
    關鍵字: Cajanus cajan (L.) Millsp.
    HNF-1 alpha
    cajaninstilbene acid
    日期: 2019-02
    上傳時間: 2020-07-29 13:48:37 (UTC+8)
    出版者: MDPI
    摘要: Pigeon pea (Cajanus cajan (L.) Millsp.) is a legume crop consumed as an indigenous vegetable in the human diet and a traditional medicinal plant with therapeutic properties. The current study highlights the cholesterol-modulating effect and underlying mechanisms of the methanol extract of Cajanus cajan L. leaves (MECC) in HepG2 cells. We found that MECC increased the LDLR expression, the cell-surface LDLR levels and the LDL uptake activity in HepG2 cells. We further demonstrated that MECC suppressed the proprotein convertase subtilisin/kexin type 9 (PCSK9) mRNA and protein expression, but not affected the expression of other cholesterol or lipid metabolism-related genes including inducible degrader of LDLR (IDOL), HMG-CoA reductase (HMGCR), fatty acid synthase (FASN), acetyl-CoA carboxylase (ACC1), and liver X receptor-alpha (LXR-) in HepG2 cells. Furthermore, we demonstrated that MECC down-regulated the PCSK9 gene expression through reducing the amount of nuclear hepatocyte nuclear factor-1 (HNF-1), a major transcriptional regulator for activation of PCSK9 promoter, but not that of nuclear sterol-responsive element binding protein-2 (SREBP-2) in HepG2 cells. Finally, we identified the cajaninstilbene acid, a main bioactive stilbene component in MECC, which significantly modulated the LDLR and PCSK9 expression in HepG2 cells. Our current data suggest that the cajaninstilbene acid may contribute to the hypocholesterolemic activity of Cajanus cajan L. leaves. Our findings support that the extract of Cajanus cajan L. leaves may serve as a cholesterol-lowering agent.
    關聯: Molecules, v.24, n.3, 493
    显示于类别:[生物科技系(所)] 期刊論文


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