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Liver X receptor α induces 17β-hydroxysteroid dehydrogenase-13 expression through SREBP-1c
- Su, W (författare)
- Peng, J (författare)
- Li, S (författare)
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- Dai, YB (författare)
- Wang, CJ (författare)
- Xu, H (författare)
- Gao, M (författare)
- Ruan, XZ (författare)
- Guan, YF (författare)
- Zhang, XY (författare)
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- (creator_code:org_t)
- American Physiological Society, 2017
- 2017
- Engelska.
- Ingår i: American journal of physiology. Endocrinology and metabolism. - : American Physiological Society. - 1522-1555 .- 0193-1849. ; 312:4, s. E357-E367
- Tidskriftsartikel (refereegranskat)
Abstract
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- Liver X receptors, including LXRα and LXRβ, are known to be master regulators of liver lipid metabolism. Activation of LXRα increases hepatic lipid storage in lipid droplets (LDs). 17β-Hydroxysteroid dehydrogenase-13 (17β-HSD13), a recently identified liver-specific LD-associated protein, has been reported to be involved in the development of nonalcoholic fatty liver disease. However, little is known about its transcriptional regulation. In the present study, we aimed at determining whether 17β-HSD13 gene transcription is controlled by LXRs. We found that treatment with T0901317, a nonspecific LXR agonist, increased both 17β-HSD13 mRNA and protein levels in cultured hepatocytes. It also significantly upregulated hepatic 17β-HSD13 expression in wild-type (WT) and LXRβ−/−mice but not in LXRα−/−mice. Basal expression of 17β-HSD13 in the livers of LXRα−/−mice was lower than that in the livers of WT and LXRβ−/−mice. Moreover, induction of hepatic 17β-HSD13 expression by T0901317 was almost completely abolished in SREBP-1c−/−mice. Bioinformatics analysis revealed a consensus sterol regulatory element (SRE)-binding site in the promoter region of the 17β-HSD13 gene. A 17β-HSD13 gene promoter-driven luciferase reporter and ChIP assays further confirmed that the 17β-HSD13 gene was under direct control of SREBP-1c. Collectively, these findings demonstrate that LXRα activation induces 17β-HSD13 expression in a SREBP-1c-dependent manner. 17β-HSD13 may be involved in the development of LXRα-mediated fatty liver.
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- American journal of physiology. Endocrinology and metabolism (Sök värdpublikationen i LIBRIS)
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- Su, W
- Peng, J
- Li, S
- Dai, YB
- Wang, CJ
- Xu, H
- visa fler...
- Gao, M
- Ruan, XZ
- Gustafsson, JA
- Guan, YF
- Zhang, XY
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