Cited by 72Drug Transport and Resistance MechanismsGut microbiota and healthCholesterol and Lipid Metabolism

Administration of Ampicillin Elevates Hepatic Primary Bile Acid Synthesis through Suppression of Ileal Fibroblast Growth Factor 15 Expression

Miyata, Masaaki, Takamatsu, Yuki, Kuribayashi, Hideaki, Yamazoe, Yasushi·2009·The Journal of Pharmacology and Experimental Therapeutics

Abstract

Administration of the antibacterial drug ampicillin (ABPC) significantly increased hepatic bile acid concentrations. In the present study, we investigated the mechanisms for the elevation of bile acid levels in ABPC-treated mice. Hepatic microsomal cholesterol 7alpha-hydroxylation and CYP7A1 mRNA level were increased 2.0-fold in ABPC-treated mice despite higher bile acid levels in the liver and small intestinal lumen. A significant change in hepatic small heterodimer partner (SHP) mRNA level was not observed in ABPC-treated mice, whereas a marked decrease in ileal fibroblast growth factor 15 (FGF15) mRNA level was observed (3% of vehicle-treated mice). These phenomena were also observed in mice cotreated with bacitracin/streptomycin/neomycin, which are barely absorbed from the intestine. Primary bile acid contents in the small intestinal lumen were increased in ABPC-treated mice, whereas secondary bile acid, deoxycholic acid (DCA), contents were reduced to below detection limits (<0.01 micromol). In ABPC-treated mice, cotreatment with tauroDCA reversed reductions in ileal FGF15 mRNA level. Ileal SHP mRNA level was, however, not decreased in ABPC-treated mice. ABPC administration to farnesoid X receptor (Fxr)-null mice also decreased ileal FGF15 mRNA levels and secondary bile acid content in the small intestinal lumen. These results suggest that ABPC administration elevates hepatic primary bile acid synthesis, at least in part, through suppression of ileal FGF15 expression.

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Crossref · 10.1124/jpet.109.160093

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Authors
Miyata, M., Takamatsu, Y., Kuribayashi, H., & Yamazoe, Y.
Affiliations
Tohoku University (JP)
Venue
The Journal of Pharmacology and Experimental Therapeutics
Publisher
Elsevier BV
Published
2009-12
Volume
331
Issue
3
Pages
1079-1085
ISSN
0022-3565 (ISSN-L)
OpenAlex
W2055432113
Cited by
72
References
39
Citations by year
2026: 4 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 4 · 2019: 4 · 2018: 5 · 2017: 3 · 2016: 8 · 2015: 10 · 2014: 8 · 2013: 5 · 2012: 5
FWCI
1.65
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Pharmacology and Experimental Therapeutics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
ampicillin, FGF15, ileum, small heterodimer partner, CYP7A1, farnesoid X receptor, deoxycholic acid, secondary bile acids
MeSH terms
Receptor, Farnesoid X-Activated, Ampicillin, Animals, Anti-Bacterial Agents, Bile Acids and Salts, Cholesterol 7-alpha-Hydroxylase, Fibroblast Growth Factors, Ileum, Liver, Male, Mice, Inbred C57BL, Microsomes, Liver, Receptors, Cytoplasmic and Nuclear, Mice, Knockout, Mice

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