Relative roles of ABCG5/ABCG8 in liver and intestine

Copyright © 2015 by the American Society for Biochemistry and Molecular Biology, Inc.

Bibliographic Details
Published in:Journal of lipid research, Vol. 56, No. 2 (2015), p. 319-30
Main Author: Wang, Jin
Other Involved Persons: Mitsche, Matthew A ; Lütjohann, Dieter ; Cohen, Jonathan C ; Xie, Xiao-Song ; Hobbs, Helen H
Format: electronic Article
Language:English
ISSN:1539-7262
Item Description:Date Completed 20.10.2015
Date Revised 02.12.2018
published: Print-Electronic
CommentIn: J Lipid Res. 2015 Feb;56(2):201-2. - PMID 25527605
Citation Status MEDLINE
Copyright: From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Physical Description:Online-Ressource
DOI:10.1194/jlr.M054544
Subjects:
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500 |a Citation Status MEDLINE 
500 |a Copyright: From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine 
520 |a Copyright © 2015 by the American Society for Biochemistry and Molecular Biology, Inc. 
520 |a ABCG5 (G5) and ABCG8 (G8) form a sterol transporter that acts in liver and intestine to prevent accumulation of dietary sterols. Mutations in either G5 or G8 cause sitosterolemia, a recessive disorder characterized by sterol accumulation and premature coronary atherosclerosis. Hepatic G5G8 mediates cholesterol excretion into bile, but the function and relative importance of intestinal G5G8 has not been defined. To determine the role of intestinal G5G8, we developed liver-specific (L-G5G8(-/-)), intestine-specific (I-G5G8(-/-)), and total (G5G8(-/-)) KO mice. Tissue levels of sitosterol, the most abundant plant sterol, were >90-fold higher in G5G8(-/-) mice than in WT animals. Expression of G5G8 only in intestine or only in liver decreased tissue sterol levels by 90% when compared with G5G8(-/-) animals. Biliary sterol secretion was reduced in L-G5G8(-/-) and G5G8(-/-) mice, but not in I-G5G8(-/-) mice. Conversely, absorption of plant sterols was increased in I-G5G8(-/-) and G5G8(-/-) mice, but not in L-G5G8(-/-) mice. Reverse cholesterol transport, as assessed from the fraction of intravenously administered (3)H-cholesterol that appeared in feces, was reduced in G5G8(-/-), I-G5G8(-/-), and L-G5G8(-/-) mice. Thus, G5G8 expression in both the liver and intestine protects animals from sterol accumulation, and intestinal G5G8 contributes to extrahepatic cholesterol efflux in mice 
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653 2 |a Animals  |6 D000818 
653 2 |a Biological Transport  |6 D001692  |a physiology  |6 Q000502 
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653 2 |a Enterocytes  |6 D020895  |a metabolism  |6 Q000378 
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653 2 |a Female  |6 D005260 
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689 2 1 |a ABCG8 protein, mouse 
689 2 2 |a ATP Binding Cassette Transporter, Subfamily G, Member 5 
689 2 3 |a ATP Binding Cassette Transporter, Subfamily G, Member 8 
689 2 4 |a ATP-Binding Cassette Transporters 
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700 1 |a Mitsche, Matthew A 
700 1 |a Lütjohann, Dieter 
700 1 |a Cohen, Jonathan C 
700 1 |a Xie, Xiao-Song 
700 1 |a Hobbs, Helen H 
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