PUBLICATION

E2F8 promotes hepatic steatosis through FABP3 expression in diet-induced obesity in zebrafish

Authors
Shimada, Y., Kuninaga, S., Ariyoshi, M., Zhang, B., Shiina, Y., Takahashi, Y., Umemoto, N., Nishimura, Y., Enari, H., Tanaka, T.
ID
ZDB-PUB-150609-5
Date
2015
Source
Nutrition & metabolism   12: 17 (Journal)
Registered Authors
Tanaka, Toshio
Keywords
Cross-species analysis, DNA microarray, Fatty liver, High-fat feeding, Obesity, Two-dimensional electrophoresis, Zebrafish
MeSH Terms
none
PubMed
26052340 Full text @ Nutr. Metab. (Lond).
Abstract
Diet-induced hepatic steatosis is highly associated with nonalcoholic fatty liver disease, which is related to the development of metabolic syndrome. While advanced stage nonalcoholic hepatic steatosis and steatohepatitis (NASH) result ultimately in fibrosis and cirrhosis, the molecular basis for lipid droplet formation is poorly understood. Common pathways underlie the pathology of mammalian obesity and the zebrafish diet-induced obesity model (DIO-zebrafish) used in this study.
Our analysis involved a combination of transcriptome (DNA microarray) and proteome (two-dimensional electrophoresis) methods using liver tissue from DIO-zebrafish to find candidate genes involved in hepatic steatosis. We conducted intraperitoneal injection (i.p.) of morpholino antisense oligonucleotides (MOs) for each gene into DIO-zebrafish. We also conducted in vitro overexpression in human cells. Additionally, we examined gene expression during feeding experiments involving anti-obesity compounds, creatine and anserine.
We found that fatty acid binding protein 3 (fabp3) and E2F transcription factors were upregulated in hepatic steatosis. E2f8 MO i.p. suppressed fabp3 expression in liver, and ameliorated hepatic steatosis. In human cells (HepG2), E2F8 overexpression promoted FABP3 expression. Additionally, co-administration of creatine and anserine suppressed obesity associated phenotypes including hepatic steatosis as indicated by e2f8 and fabp3 down regulation.
We discovered that the e2f8-fabp3 axis is important in the promotion of hepatic steatosis in DIO-zebrafish. The combination of transcriptome and proteome analyses using the disease model zebrafish allow identification of novel pathways involved in human diseases.
Genes / Markers
Figures
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Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping