6,7-dihydroxy Bergamottin

- Overview
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    Background
    
    IC50: 25 μM6,7-dihydroxy Bergamottin, also known as 6,7-DHB, is a potent inhibitor of cytochrome P4503A4 (CYP3A4) with an IC50 value of 25 μM. As a primary compound in grapefruit juice, 6,7-DHB is responsible for the blockade the activity of testosterone 6β-hydrolase. CYP3A4 is an important enzyme, mainly found in both the intestinal wall and liver, which oxidizes small foreign organic molecules (xenobiotics), such as toxins or drugs.In vitro: 6,7-DHB significantly blocked the testosterone 6β-hydrolase in human liver microsomes and human CYP3A4 expressed in Escherichia coli membrane in a time- and concentration-dependent manner. Furthermore, 6,7-DHB proved to be a potent NADPH- and time-dependent inhibitor of CYP3A4 [1]. 6,7-DHB concentration-dependently inhibited nifedipine (NFP) oxidation in HepG2-GS-3A4 cell, a cell line from hepatoblastoma with overexpression of human CYP3A4 [2].In vivo: Male Wistar-ST rats were intraduodenally administered with 6,7-DHB at a dose of 3.4 mg/ml. After 4 hours, 6,7-DHB had no significant effects on the NFP plasma concentrations, suggesting that 6,7-DHB had no pharmacokinetic effect on the rats [3].
    
    [1]. Bellevue, F., Woster, P., Edwards, D., He, K., & Hollenberg, P. Synthesis and biological evaluation of 6′,7′-dihydroxybergamottin (6,7-DHB), a naturally occurring inhibitor of cytochrome P450 3A4. Bioorganic & Medicinal Chemistry Letters. 1997; 7(20): 2593-2598.
    [2]. Araki, N., Tsuruoka, S., Hasegawa, G., Yanagihara, H., Omasa, T., & Enosawa, S. et al. Inhibition of CYP3A4 by 6′,7′-dihydroxybergamottin in human CYP3A4 over-expressed hepG2 cells. Journal of Pharmacy and Pharmacology. 2012; 64(12): 1715-1721.
    [3]. Mohri, K., & Uesawa, Y. Effects of Furanocoumarin Derivatives in Grapefruit Juice on Nifedipine Pharmacokinetics in Rats. Pharmaceutical Research, 2001;18(2):177-182.
- Properties
  - Alternative Name
    
    6,7-DHB; 4-[[(2E)-6,7-dihydroxy-3,7-dimethyl-2-octenyl]oxy]-7H-fuoro[3,2-g][1]benzopyran-7-one
    
    CAS Number
    
    145414-76-2
    
    Molecular Formula
    
    C21H24O6
    
    Molecular Weight
    
    372.4
    
    Appearance
    
    A crystalline solid
    
    Purity
    
    98.00%
    
    Solubility
    
    ≤10mg/ml in ethanol;30mg/ml in DMSO;30mg/ml in dimethyl formamide
    
    Storage
    
    Store at -20°C
    
    * For Research Use Only

6,7-dihydroxy Bergamottin

Background

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