Abstract
Purpose
Studies have found that pomegranate juice (PJ) consumption increases the binding of high-density lipoproteins (HDL) to paraoxonase 1 (PON1), thus increasing the catalytic activity of this enzyme. PON1 is an antioxidant arylesterase synthesized in the liver and transported in plasma in association with HDL. Decreased levels of PON1 are associated with higher levels of cholesterol. We determined the effects of PJ on body weight, cholesterol, and triacylglycerols through 5 months of supplementation. In addition, the effect of PJ on pon1 gene expression in the liver was also measured by RT-qPCR as well as the activity in serum by a semiautomated method using paraoxon as a substrate.
Methods
CD-1 mice were either fed a control diet or were fed a high-fat diet 1.25% (wt/wt) cholesterol, 0.5% (wt/wt) sodium cholate, and 15% (wt/wt) saturated fat. 300 μL of PJ containing 0.35 mmol total polyphenols was administered by oral gavage to half of the high fat mice daily. The rest of the high fat mice and the control mice were administered with 300 μL of water.
Results
PJ-supplemented animals had significantly higher levels of expression of pon1 compared to the unsupplemented group. PJ-supplemented animals had twice the PON1 activity of the unsupplemented group. In addition, PJ-supplemented animals had the lowest body weight and significantly reduced cholesterol and triacylglycerol levels, although the tricylglycerol levels were not consistently decreased.
Conclusions
These results suggest that PJ protects against the effects of a high-fat diet in body weight, and cholesterol levels.
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Acknowledgements
Financial support for this work was provided by CONACyT Problemas Nacionales PDCPN2013-01 and PAI 2015 UAEH. Juan C. Cancino-Díaz is a fellow from COFAA-IPN, EDI-IPN, and SNI-CONACYT. We also thank Fernanda Resendiz and Rodrigo Ronces for his assistance in editing this work.
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Estrada-Luna, D., Martínez-Hinojosa, E., Cancino-Diaz, J.C. et al. Daily supplementation with fresh pomegranate juice increases paraoxonase 1 expression and activity in mice fed a high-fat diet. Eur J Nutr 57, 383–389 (2018). https://doi.org/10.1007/s00394-017-1394-2
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DOI: https://doi.org/10.1007/s00394-017-1394-2