Biotransformations of 6',7'-dihydroxybergamottin and 6',7'-epoxybergamottin by the citrus-pathogenic fungi diminish cytochrome P450 3A4 inhibitory activity.

Abstract:

:Penicillium digitatum, as well as five other citrus pathogenic species, (Penicillium ulaiense Link, Geotrichum citri Link, Botrytis cinerea P. Micheli ex Pers., Lasiodiplodia theobromae (Pat.) Griffon & Maubl., and Phomopsis citri (teleomorph Diaporthe citri)) were observed to convert 6',7'-epoxybergamottin (1) into 6',7'-dihydroxybergamottin (2), bergaptol (3), and an opened lactone ring metabolite 6,7-furano-5-(6',7'-dihydroxy geranyloxy)-2-hydroxy-hydrocoumaric acid (4). Metabolism of 2 by these fungi also proceeded to 4. The structure of 4 was established by high resolution mass spectrometry and (1)H and (13)C NMR techniques. The inhibitory activity of 4 towards human intestinal cytochrome P450 3A4 (CYP3A4) was greatly decreased (IC(50) >172.0 μM) compared to 2 (IC(50)=0.81 μM).

journal_name

Bioorg Med Chem Lett

authors

Myung K,Manthey JA,Narciso JA

doi

10.1016/j.bmcl.2012.01.081

subject

Has Abstract

pub_date

2012-03-15 00:00:00

pages

2279-82

issue

6

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(12)00114-X

journal_volume

22

pub_type

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