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Abstract Title:

A high omega-3 fatty acid diet rapidly changes the lipid composition of cardiac tissue and results in cardio-protection.

Abstract Source:

Can J Physiol Pharmacol. 2018 May 28. Epub 2018 May 28. PMID: 29806983

Abstract Author(s):

Melissa Desnoyers, Kim Gilbert, Ness Madingou, Marc-André Gagné, Caroline Daneault, Christine des Rosiers, Guy Rousseau

Article Affiliation:

Melissa Desnoyers

Abstract:

The present study was designed to ascertain the effects of 3 diets with different omega-3/6 fatty acid ratios on infarct size and the modifications that these diets induce in the lipid composition of cardiac tissue. Sprague-Dawley rats were fed omega-3/6 fatty acid diets with 1:1, 1:5 or 1:20 ratios for at least 10 days, followed by occlusion of the left anterior descending artery for 40 min and 24 h of reperfusion. Infarct size was significantly smaller in the 1:1 group compared to the other groups. Significantly higher concentrations of the omega-3 fatty acids eicosapentaenoic acid, docosapentaenoic acid and docosahexaenoic acid were found in the 1:1 and other groups. Omega-6 polyunsaturated fatty acid levels were similar between groups, although they were higher in the 1:5 and 1:20 groups compared to the 1:1 group. Margaric acid concentrations were higher in the 1:1 group than in both other groups. Docosahexaenoic acid levels in cardiac tissue and infarct size were significantly correlated with no other significant links being apparent. In conclusion, the present study indicated that a 1:1 omega-3/6 fatty acid ratio protected against ischemia and was associated with increased omega-3 fatty acid composition of cardiac tissue.

Study Type : Animal Study

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