Cited by 141Drug Transport and Resistance MechanismsLiver Diseases and ImmunityCholesterol and Lipid Metabolism

Pharmacological inhibition of apical sodium-dependent bile acid transporter changes bile composition and blocks progression of sclerosing cholangitis in multidrug resistance 2 knockout mice

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Miethke, Alexander G., Zhang, Wujuan, Simmons, Julia, Taylor, Amy E., Shi, Tiffany, Shanmukhappa, Shiva Kumar, Karns, Rebekah, White, Shana +5 more·2016·Hepatology

Abstract

UNLABELLED: Deficiency of multidrug resistance 2 (mdr2), a canalicular phospholipid floppase, leads to excretion of low-phospholipid "toxic" bile causing progressive cholestasis. We hypothesize that pharmacological inhibition of the ileal, apical sodium-dependent bile acid transporter (ASBT), blocks progression of sclerosing cholangitis in mdr2(-/-) mice. Thirty-day-old, female mdr2(-/-) mice were fed high-fat chow containing 0.006% SC-435, a minimally absorbed, potent inhibitor of ASBT, providing, on average, 11 mg/kg/day of compound. Bile acids (BAs) and phospholipids were measured by mass spectrometry. Compared with untreated mdr2(-/-) mice, SC-435 treatment for 14 days increased fecal BA excretion by 8-fold, lowered total BA concentration in liver by 65%, reduced total BA and individual hydrophobic BA concentrations in serum by >98%, and decreased plasma alanine aminotransferase, total bilirubin, and serum alkaline phosphatase levels by 86%, 93%, and 55%, respectively. Liver histology of sclerosing cholangitis improved, and extent of fibrosis decreased concomitant with reduction of hepatic profibrogenic gene expression. Biliary BA concentrations significantly decreased and phospholipids remained low and unchanged with treatment. The phosphatidylcholine (PC)/BA ratio in treated mice corrected toward a ratio of 0.28 found in wild-type mice, indicating decreased bile toxicity. Hepatic RNA sequencing studies revealed up-regulation of putative anti-inflammatory and antifibrogenic genes, including Ppara and Igf1, and down-regulation of several proinflammatory genes, including Ccl2 and Lcn2, implicated in leukocyte recruitment. Flow cytometric analysis revealed significant reduction of frequencies of hepatic CD11b(+) F4/80(+) Kupffer cells and CD11b(+) Gr1(+) neutrophils, accompanied by expansion of anti-inflammatory Ly6C(-) monocytes in treated mdr2(-/-) mice. CONCLUSION: Inhibition of ASBT reduces BA pool size and retention of hydrophobic BA, favorably alters the biliary PC/BA ratio, profoundly changes the hepatic transcriptome, attenuates recruitment of leukocytes, and abrogates progression of murine sclerosing cholangitis.

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  • The BA sequestrant colesevelam and ASBT inhibitors (lopixibat and A4250) completely reversed liver and bile duct injury in Mdr2/Abcb4-/- mice.

    “The BA sequestrant colesevelam and ASBT inhibitors (lopixibat and A4250) completely reversed liver and bile duct injury in Mdr2/Abcb4–/– mice,198–200”

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Authors
Miethke, A. G., Zhang, W., Simmons, J., Taylor, A. E., Shi, T., Shanmukhappa, S. K., Karns, R., White, S., Jegga, A. G., Lages, C. S., Nkinin, S., Keller, B. T., & Setchell, K. D. R.
Affiliations
  • Cincinnati Children's Hospital Medical Center (US)
  • Takeda (United States) (US)
Corresponding author
Miethke, Alexander G.
Venue
Hepatology
Published
2015-08-21
Volume
63
Issue
2
Pages
512-523
ISSN
  • 0270-9139 (ISSN-L)
  • 1527-3350
OpenAlex
W1657692460
Cited by
141
References
38
Citations by year
2026: 5 · 2025: 6 · 2024: 13 · 2023: 8 · 2022: 9 · 2021: 16 · 2020: 20 · 2019: 11 · 2018: 21 · 2017: 17 · 2016: 11 · 2015: 4
FWCI
7.72
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (UL1TR001425)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK78392, DK095001, P30DK090971, DK90971, R01DK095001, T32DK007727, P30DK078392)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR47363, P30AR047363)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Health Sciences › Medicine › Hepatology › Liver Diseases and Immunity
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
ASBT, Mdr2 knockout mice, sclerosing cholangitis, bile acid composition, cholestasis, liver fibrosis, Kupffer cells, neutrophils, monocytes, liver transcriptome, anti-inflammatory genes, bile acid excretion, drug repurposing, cholangiocarcinoma
MeSH terms
ATP-Binding Cassette Sub-Family B Member 4, Animals, Bile, Cyclic N-Oxides, Female, Tropanes, Cholangitis, Sclerosing, Mice, Knockout, ATP Binding Cassette Transporter, Subfamily B, Disease Progression, Symporters, Organic Anion Transporters, Sodium-Dependent, Mice

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