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Nutrition. 2015 Sep;31(9):1148-54. doi: 10.1016/j.nut.2015.03.014. Epub 2015 Apr 28.

Dietary silicon-enriched spirulina improves early atherosclerosis markers in hamsters on a high-fat diet.

Author information

1
Nutrition and Metabolism, UMR 204 NUTRIPASS, Prevention of Malnutrition and Linked Pathologies, University of Montpellier, Montpellier, France.
2
INSERM U1046, University of Montpellier, Montpellier, France.
3
Anatomy-Pathology, Guy de Chauliac Hospital-University Center, Montpellier, France.
4
Phyco-Biotech, Rue Maurice Béjart, Montpellier, France.
5
Nutrition and Metabolism, UMR 204 NUTRIPASS, Prevention of Malnutrition and Linked Pathologies, University of Montpellier, Montpellier, France. Electronic address: Jm.rouanet@univ-montp2.fr.

Abstract

OBJECTIVE:

The aim of this study was to investigate the effects of dietary silicon-enriched spirulina (SES) on atherosclerosis.

METHODS:

Hamsters (six per group) on a high-fat (HF) diet received SES or non-enriched spirulina (both at 57 mg/kg body weight) daily. This corresponded to 0.57 mg silicon/kg body weight daily.

RESULTS:

The HF diet induced dyslipidemia, insulin resistance, oxidative stress, and vascular dysfunction. Compared with the HF group, SES attenuated increases of lipemia and prevented insulin resistance (IR) (P = 0.001). SES protected against oxidative stress through a reduction of heart (P = 0.006) and liver (P < 0.0001) nicotinamide adenine dinucleotide phosphate-oxidase activity and by sparing the activity of superoxide dismutase (P = 0.0017) and glutathione peroxidase (P = 0.01861). SES decreased inflammation, lowering tumor necrosis factor-α (P = 0.0006) and interleukin-6 levels (P = 0.0112), decreasing polymorphonuclear cells and preventing nuclear factor-κB activity (P = 0.0259). SES corrected plasma level of monocyte chemoattractant protein-1 (P = 0.0380), which was increased by the HF diet. Finally, SES supplementation prevented vascular and endothelial functions assessed respectively by the contractile response to the agonist phenylephrine and the relaxation induced by acetylcholine.

CONCLUSION:

SES protects against metabolic imbalance, inflammation, oxidative stress, and vascular dysfunction induced by an HF diet, and could prevent the atherogenic processes. Synergistic effects between spirulina and silicon were observed.

KEYWORDS:

Atherosclerosis; Hamsters; Liver inflammation; Oxidative stress; Silicon-enriched spirulina

PMID:
26233874
DOI:
10.1016/j.nut.2015.03.014
[Indexed for MEDLINE]

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