Effects of Chemical Modification of Ursodeoxycholic Acid on TGR5 Activation

The aim of this study is to examine the ability of the bile acid analogues obtained by chemical modification of ursodeoxycholic acid (UDCA) for TGR5 activation. Eleven UDCA analogues including 3- or 7-methylated UDCAs and amino acid conjugates were investigated as to their ability to activate TGR5 b...

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Veröffentlicht in:Biological & Pharmaceutical Bulletin 2011/01/01, Vol.34(1), pp.1-7
Hauptverfasser: Iguchi, Yusuke, Nishimaki-Mogami, Tomoko, Yamaguchi, Masafumi, Teraoka, Fumiteru, Kaneko, Tetsuo, Une, Mizuho
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container_issue 1
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container_title Biological & Pharmaceutical Bulletin
container_volume 34
creator Iguchi, Yusuke
Nishimaki-Mogami, Tomoko
Yamaguchi, Masafumi
Teraoka, Fumiteru
Kaneko, Tetsuo
Une, Mizuho
description The aim of this study is to examine the ability of the bile acid analogues obtained by chemical modification of ursodeoxycholic acid (UDCA) for TGR5 activation. Eleven UDCA analogues including 3- or 7-methylated UDCAs and amino acid conjugates were investigated as to their ability to activate TGR5 by means of the luciferase assay. It was noteworthy that 7α-methylated UDCA, namely 3α,7β-dihydroxy-7α-methyl-5β-cholanoic acid, had a significantly high affinity for and ability to activate TGR5 as compared to UDCA. Additionally, FXR activation ability of 7α-methylated UDCA was low relative to that of UDCA. However, other modification of UDCA, such as the introduction of methyl group at its C-3 position and oxidation or epimerization of hydroxyl group in the C-3 position, could not elicit such remarkable effect. The present findings would provide a useful strategy for the development of TGR5-selective agonist.
doi_str_mv 10.1248/bpb.34.1
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Eleven UDCA analogues including 3- or 7-methylated UDCAs and amino acid conjugates were investigated as to their ability to activate TGR5 by means of the luciferase assay. It was noteworthy that 7α-methylated UDCA, namely 3α,7β-dihydroxy-7α-methyl-5β-cholanoic acid, had a significantly high affinity for and ability to activate TGR5 as compared to UDCA. Additionally, FXR activation ability of 7α-methylated UDCA was low relative to that of UDCA. However, other modification of UDCA, such as the introduction of methyl group at its C-3 position and oxidation or epimerization of hydroxyl group in the C-3 position, could not elicit such remarkable effect. 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subjects Dose-Response Relationship, Drug
farnesoid X receptor
Gene Expression Regulation - drug effects
HEK293 Cells
Humans
metabolic syndrome
Molecular Structure
Receptors, G-Protein-Coupled - genetics
Receptors, G-Protein-Coupled - metabolism
Structure-Activity Relationship
TGR5
ursodeoxycholic acid
Ursodeoxycholic Acid - analogs & derivatives
Ursodeoxycholic Acid - chemistry
Ursodeoxycholic Acid - pharmacology
title Effects of Chemical Modification of Ursodeoxycholic Acid on TGR5 Activation
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