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Pomegranate juice inhibits oxidized LDL uptake and cholesterol biosynthesis in macrophages

Bianca Fuhrman1, Nina Volkova, Michael Aviram

  • 1Lipid Research Laboratory, Technion Faculty of Medicine, The Rappaport Family Institute for Research in the Medical Sciences, Rambam Medical Center, Haifa 31096, Israel.

The Journal of Nutritional Biochemistry
|August 24, 2005
PubMed

Insights

Pomegranate juice (PJ) inhibits macrophage foam cell formation by reducing oxidized LDL degradation and cholesterol biosynthesis. This study clarifies mechanisms behind PJ

Area of Science:

  • Cardiovascular Science
  • Cell Biology
  • Nutritional Science

Background:

  • Macrophage cholesterol accumulation and foam cell formation are key in early atherogenesis.
  • Pomegranate juice (PJ) has demonstrated potential in inhibiting foam cell formation and atherosclerotic lesion development.

Purpose of the Study:

  • To investigate the mechanisms by which pomegranate juice (PJ) reduces cholesterol accumulation in macrophages.
  • To elucidate the impact of PJ on cholesterol influx, efflux, and biosynthesis in macrophages.

Main Methods:

  • J774.A1 macrophages were incubated with PJ.
  • Assessed cholesterol influx via LDL and oxidized LDL (Ox-LDL) degradation.
  • Measured cholesterol efflux and cholesterol biosynthesis rates.

Main Results:

  • PJ significantly reduced Ox-LDL degradation by 40% (P<.01).
  • PJ did not affect native LDL degradation or cholesterol efflux.
  • Macrophage cholesterol biosynthesis was inhibited by 50% (P<.01) but not via the HMG-CoA reductase pathway.

Conclusions:

  • Pomegranate juice suppresses Ox-LDL degradation and cholesterol biosynthesis in macrophages.
  • These actions contribute to reduced cellular cholesterol accumulation and foam cell formation.
  • PJ offers a potential dietary intervention for mitigating early atherogenesis.

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