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Abstract Title:

Protective Role of Flaxseed Oil and Flaxseed Lignan Secoisolariciresinol Diglucoside Against Oxidative Stress in Rats with Metabolic Syndrome.

Abstract Source:

J Food Sci. 2017 Dec ;82(12):3029-3036. Epub 2017 Oct 30. PMID: 29083494

Abstract Author(s):

Bruna Pilar, Angélica Güllich, Patrícia Oliveira, Deise Ströher, Jacqueline Piccoli, Vanusa Manfredini

Article Affiliation:

Bruna Pilar

Abstract:

: This study evaluated the protective effect of flaxseed oil (FO) and flaxseed lignan secoisolariciresinol diglucoside (SDG) against oxidative stress in rats with metabolic syndrome (MS). 48 rats were allocated into the following 6 groups: Groups 1 (control), 5 (FO), and 6 (SDG) received water and were treated daily orally with saline, FO, and SDG, respectively. Groups 2 (MS), 3 (MS+FO), and 4 (MS+SDG) received 30% fructose in drinking water for MS induction and were treated daily orally with saline, FO, and SDG, respectively. After 30 d, animals were sacrificed, and blood was collected for biochemical and oxidative analysis. Body weight was recorded weekly. Systolic blood pressure (SBP) was measured before and after treatment. Fructose could produce MS and oxidative stress. FO and SDG prevented changes in SBP, lipids, and glucose. FO and SDG prevented oxidative damage to lipids, and only FO prevented oxidative damage to proteins associated to MS. FO and SDG improved enzymatic antioxidants defenses and reduced glutathione levels, which was greater with SDG. Total polyphenol levels were enhanced in groups that received SDG. Thus, the results of this study demonstrated that treatment with a 30% fructose solution for 30 d is effective for MS induction and the oxidative stress is involved in the pathophysiology of MS induced by fructose-rich diets. Furthermore, we demonstrated that the antioxidant effects attributed to flaxseed are mainly due to its high lignan content especially that of SDG, suggesting that this compound can be used in isolation to prevent oxidative stress associated with MS.

PRACTICAL APPLICATION: We report that the antioxidant effects attributed to flaxseed are mainly due to its high lignan content, especially that of secoisolariciresinol diglucoside. This is significant because suggests that this compound can be used in isolation to prevent oxidative stress associated with MS. Furthermore, this study was the only one to perform a comparison of the abilities of 2 components of flaxseed to protect against oxidative stress in an MS model, which brings a great advance in the medicine's field, since it indicates another alternative for improve the health and the quality of life of patients with this disorder.

Study Type : Animal Study

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Sayer Ji
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