Regulation of Thb Gene Expression by PPARα and HNF4α
Author Information
Author(s): J. Chamouton, H. Hansmannel, J. A. Bonzo, M. C. Clémencet, G. Chevillard, M. Battle, P. Martin, T. Pineau, S. Duncan, F. J. Gonzalez, N. Latruffe, S. Mandard, N. Nicolas-Francès
Primary Institution: Centre de Recherche, INSERM U866, Dijon, France
Hypothesis
HNF4α enhances the PPARα-mediated activation of Thb gene expression in the liver.
Conclusion
HNF4α plays a critical role in the regulation of Thb gene expression, particularly in response to PPARα activation.
Supporting Evidence
- HNF4α enhances the transcriptional activity of PPARα on the Thb gene.
- Thb mRNA levels were significantly induced by the PPARα agonist Wy14,643.
- Coimmunoprecipitation assays showed physical interaction between HNF4α and RXRα.
- Transactivation assays indicated that HNF4α modulates PPARα activity.
- Thb expression was lower in HNF4α-null mice compared to controls.
- Multiple PPREs were identified in the Thb gene, indicating complex regulation.
Takeaway
This study shows that two important proteins in the liver, PPARα and HNF4α, work together to control a gene that helps break down fats.
Methodology
The study used transgenic mice and cell culture experiments to assess the regulation of Thb by PPARα and HNF4α.
Potential Biases
Potential bias due to the use of specific mouse strains and the controlled laboratory environment.
Limitations
The study primarily focuses on mouse models, which may not fully represent human physiology.
Participant Demographics
Nine-week-old male C57BL/6J mice and age-matched wild-type mice were used.
Statistical Information
P-Value
0.029
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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