Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Lactobacillus plantarum DR7 Reduces Cholesterol via Phosphorylation of AMPK That Down-regulated the mRNA Expression of HMG-CoA Reductase

  • Lew, Lee-Ching (School of Industrial Technology, Universiti Sains Malaysia) ;
  • Choi, Sy-Bing (School of Industrial Technology, Universiti Sains Malaysia) ;
  • Khoo, Boon-Yin (Institute for Research on Molecular Medicine, Universiti Sains Malaysia) ;
  • Sreenivasan, Sasidharan (Institute for Research on Molecular Medicine, Universiti Sains Malaysia) ;
  • Ong, Kee-Leong (Clinical Nutrition Intl (M) Sdn Bhd) ;
  • Liong, Min-Tze (School of Industrial Technology, Universiti Sains Malaysia)
  • Received : 2017.09.29
  • Accepted : 2018.03.13
  • Published : 2018.04.30
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Abstract

Hypercholesterolemia is one of the primary risk factors for cardiovascular diseases. The use of lactobacilli probiotics to reduce blood cholesterol levels have been extensively reported. However, more information is needed to evaluate the possible mechanisms involved and to identify possible targets for further therapeutic development. In this study, strains of lactobacilli were screened based on the ability to assimilate cholesterol, and prevention of cholesterol accumulation in hepatic (HepG2) and intestinal (HT-29) cells. Cell free supernatant (CFS) from Lactobacillus plantarum DR7 showed a higher ability to assimilate cholesterol, reduction in cholesterol accumulation in both HepG2 and HT-29 cells, accompanied by reduced mRNA expression of HMG-CoA reductase (HMGCR) in HepG2 (p<0.05), compared to other lactobacilli. The reduction of HMGCR expression was also diminished in the presence of an AMPK inhibitor (Compound C), suggesting that L. plantarum DR7 exerted its effect via the AMPK pathway, typically via the phosphorylation of AMPK instead of the AMPK mRNA expression in HepG2 (p<0.05). Altogether, our present study illustrated that lactobacilli could exert cholesterol lowering properties along the AMPK pathway, specifically via phosphorylation of AMPK that led to reduced expression of HMGCR.

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References

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