European Journal of Nutrition

, Volume 50, Issue 2, pp 81–88 | Cite as

Dietary naringenin increases hepatic peroxisome proliferators–activated receptor α protein expression and decreases plasma triglyceride and adiposity in rats

  • Kae Won Cho
  • Yong Ook Kim
  • Juan E. Andrade
  • John R. Burgess
  • Young-Cheul Kim
Original Contribution

Abstract

Background

Naringenin, a flavonoid present in grapefruit, has recently been shown to exert hypolipidemic and hypocholesterolemic effects, which has a particular importance for protecting against chronic diseases. However, the lipid-lowering potential of naringenin at the concentrations in the dietary range and its underlying mechanisms have yet to be fully elucidated.

Aim

The aim of the present study was (1) to investigate the effects of dietary naringenin on plasma and hepatic triglyceride and cholesterol levels and on adipose deposition in rat and (2) to determine the contribution of hepatic peroxisome proliferators–activated receptor α (PPARα) expression to fatty acid oxidation.

Methods

Male Long-Evans hooded rats were fed a diet supplemented with naringenin (0.003, 0.006, and 0.012%) for 6 weeks. We analyzed plasma and hepatic lipid contents and determined the protein expression of PPARα, carnitine-palmitoyl transferase 1L (CPT-1), and uncoupling protein 2 (UCP2), all of which are critical genes for fatty acid oxidation.

Results

Naringenin supplementation caused a significant reduction in the amount of total triglyceride and cholesterol in plasma and liver. In addition, naringenin supplementation lowered adiposity and triglyceride contents in parametrial adipose tissue. Naringenin-fed animals showed a significant increase in PPARα protein expression in the liver. Furthermore, expression of CPT-1 and UCP2, both of which are known to be regulated by PPARα, was markedly enhanced by naringenin treatment.

Conclusions

Our results indicate that the activation of PPARα transcription factor and upregulation of its fatty acid oxidation target genes by dietary naringenin may contribute to the hypolipidemic and anti-adiposity effects in vivo.

Keywords

Naringenin Hypolipidemic effect Anti-adiposity PPAR-α CPT-1 UCP2 In vivo 

Notes

Acknowledgments

This research was in part supported by Grants (S00000005000000) from the University of Massachusetts, Amherst.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Kae Won Cho
    • 1
  • Yong Ook Kim
    • 1
  • Juan E. Andrade
    • 2
  • John R. Burgess
    • 2
  • Young-Cheul Kim
    • 1
  1. 1.Department of NutritionUniversity of MassachusettsAmherstUSA
  2. 2.Department of Foods and NutritionPurdue UniversityWest LafayetteUSA

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