NDLI: Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells

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Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells

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Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells

Content Provider	MDPI
Author	Liu, Cheng-Ling Lim, Yun-Ping Hu, Miao-Lin
Abstract	Pregnane X receptor (PXR) has been reported to regulate the expression of drug-metabolizing enzymes, such as the cytochrome P450 3A (CYP3A) family and transporters, such as multiple drug resistance 1 (MDR1). Fucoxanthin, the major carotenoid in brown sea algae, is a putative chemopreventive agent. In this study, we determined whether fucoxanthin could overcome drug resistance through attenuation of rifampin-induced CYP3A4 and MDR1 gene expression by PXR-mediated pathways in HepG2 hepatoma cells. We found that fucoxanthin (1–10 μM) significantly attenuated rifampin (20 μM)-induced CYP3A4, MDR1 mRNA and CYP3A4 protein expression at 24 h of incubation. Mechanistically, fucoxanthin strongly attenuated the PXR-mediated CYP3A4 promoter activity in HepG2 cells. In addition, fucoxanthin attenuated constitutive androstane receptor (CAR)- and rPXR-mediated CYP3A4 promoter activity in this cell line. Using the mammalian two-hybrid assay, we found that fucoxanthin significantly decreased the interaction between PXR and SRC-1, a PXR co-activator. Thus, fucoxanthin can decrease rifampin-induced CYP3A4 and MDR1 expression through attenuation of PXR-mediated CYP3A4 promoter activation and interaction between PXR and co-activator. These findings could lead to potentially important new therapeutic and dietary approaches to reduce the frequency of adverse drug reactions.
File Size	782336
Ending Page	257
Page Count	16
Starting Page	242
File Format	PDF
e-ISSN	16603397
DOI	10.3390/md10010242
Journal	Marine Drugs
Issue Number	1
Volume Number	10
Language	English
Publisher Date	2012-01-23
Access Restriction	Open
Subject Keyword	fucoxanthin PXR CYP3A4 MDR1 drug resistance rifampin
Content Type	Text
Resource Type	Article

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Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells

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Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells

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Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells

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Fucoxanthin Attenuates Rifampin-Induced Cytochrome P450 3A4 (CYP3A4) and Multiple Drug Resistance 1 (MDR1) Gene Expression Through Pregnane X Receptor (PXR)-Mediated Pathways in Human Hepatoma HepG2 and Colon Adenocarcinoma LS174T Cells