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Abstract Title:

Dietary supplementation with omega-3 polyunsaturated fatty acids modulate matrix metalloproteinase immunoreactivity in a mouse model of pre-abdominal aortic aneurysm.

Abstract Source:

Heart Lung Circ. 2015 Apr ;24(4):377-85. Epub 2014 Nov 20. PMID: 25512019

Abstract Author(s):

Kristyn Kavazos, Maria Nataatmadja, Kathryn M Wales, Elke Hartland, Chloe Williams, Fraser D Russell

Article Affiliation:

Kristyn Kavazos

Abstract:

BACKGROUND: Two-day infusion of angiotensin II to apolipoprotein E-deficient (ApoE(-/-)) mice provides a model of pre-abdominal aortic aneurysm. Long chain omega-3 polyunsaturated fatty acids (n-3 PUFAs) have anti-inflammatory effects. This study examined the effect of an eight-week low or high n-3 PUFA diet in ApoE(-/-) mice on matrix metalloproteinase (MMP) expression and elastin degradation.

METHODS: ApoE(-/-) mice were fed a low or high n-3 PUFA diet for eight weeks prior to two-day infusion with angiotensin II. The omega-3 index, MMP-2, MMP-9, TIMP-1, and TGF-β1 immunoreactivity, and elastin fragmentation were measured.

RESULTS: The omega-3 index with the low and high n-3 PUFA diet was 3.78% and 13.03%, respectively. MMP-9 immunoreactive stain intensity was lower in mice fed the high, compared to the low n-3 PUFA diet in endothelial cells (suprarenal aorta), and inflammatory cells (suprarenal and infrarenal aorta). Inflammatory cells had higher TIMP-1 and TGF-β1 stain intensity in mice fed the high, compared to the low n-3 PUFA diet (suprarenal aorta). MMP-2 immunoreactivity was unaffected by diet. A non-significant trend for reduced elastin fragmentation was observed in mice fed the high n-3 PUFA diet.

CONCLUSION: Dietary supplementation with n-3 PUFAs may have protective anti-inflammatory effects mediated through modulation of MMPs and TIMPs.

Study Type : Animal Study

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