Abstract | BACKGROUND: RESEARCH DESIGN AND METHODS: RESULTS: PDCD4 expression increased and it was mainly distributed in hepatocyte nuclei of the HFD- NAFLD rats. as well as the FFAs-treated CBRH-7919 and BRL 3A cell lines. Pdcd4 knockout significantly suppressed FFAs-induced lipid accumulation, and Pdcd4 overexpression accelerated FFAs-induced lipid accumulation in hepatocytes. Mechanistically, Pdcd4 negatively regulated the expression Pparα and Acox1-3. In addition, rescue experiments confirmed that Pparα knockdown could attenuate the expression of Acox1-3 in Pdcd4 knockout cells, which ultimately restored lipid deposition to normal levels. PPARα expression decreased in the liver of the HFD- NAFLD rats. The enrichment of PDCD4 in hepatocyte nuclei correlated with lower PPARα expression after FFAs treatment in vitro. CONCLUSION: Our results indicate that the abundance of PDCD4 under high-fat conditions facilitates hepatocellular lipid accumulation by decreasing PPARα-dependent FA peroxisomal β-oxidation.
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Authors | Xiaojuan Du, Ezra Kombo Osoro, Qian Chen, Xiaofei Yan, Dan Gao, Litao Wu, Jiajun Ren, Lina Feng, Nan Wu, Kaikai Lu, Xudong Yang, Bo Zhong, Yan Han, Fujun Zhang, Dongmin Li, Xi Lan, Shemin Lu |
Journal | Molecular and cellular endocrinology
(Mol Cell Endocrinol)
Vol. 545
Pg. 111562
(04 05 2022)
ISSN: 1872-8057 [Electronic] Ireland |
PMID | 35051553
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2022 Elsevier B.V. All rights reserved. |
Chemical References |
- Apoptosis Regulatory Proteins
- Fatty Acids
- Lipids
- PPAR alpha
- Pdcd4 protein, rat
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Topics |
- Animals
- Apoptosis Regulatory Proteins
(genetics, metabolism)
- Fatty Acids
(metabolism)
- Hepatocytes
(metabolism)
- Lipid Metabolism
(genetics)
- Lipids
- Liver
(metabolism)
- Non-alcoholic Fatty Liver Disease
(metabolism)
- PPAR alpha
(genetics, metabolism)
- Rats
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