High-selenium lentil diet protects against arsenic-induced atherosclerosis in a mouse model

卷:27

Krohn, Regina M. ; Lemaire, Maryse ; Silva, Luis F. Negro ; Lemarie, Catherine ; Bolt, Alicia ; Mann, Koren K. ; Smits, Judit E.

Univ Calgary

关键词: Arsenic toxicity;    Atherosclerosis;    Selenium;    Biofortification;    Lentils;    Oxidative stress;   

DOI  :  10.1016/j.jnutbio.2015.07.003

学科分类：食品科学和技术

【 摘 要 】

Background: Cardiovascular disease (CVD) is a major cause of death worldwide, and arsenic (As) intake, mainly through drinking water, is a well-known risk factor for CVD as well as other health problems. Selenium (Se) is a known antagonist to As toxicity. Objective: We tested the potential of high-Se lentils from the Canadian prairies as a therapeutic food to alter the outcome of As-enhanced atherosclerosis. Materials and Methods: Male ApoE(-/-) mice exposed to a moderate level of As (200 ppb) in their drinking water, and control mice on tap water received one of three lentil diets: Se-deficient (0.009 mg/kg), Se-adequate (0.16 mg/kg) or Se-high (0.3 mg/kg). After 13 weeks, lesion formation in the aortic arch and sinus were assessed. Intralesional cellular composition, serum lipid levels and hepatic oxidative stress were assessed as well. Results: Arsenic-exacerbated plaque formation was reduced in the sinus and completely abolished in the aortic arch of mice on the Se-fortified lentil diet, whereas lesions were increased in As-exposed mice on both the Se-deficient and Se-adequate diets. Notably, Se deficiency contributed to proatherogenic composition of serum lipids in As-exposed mice as indicated by high-density lipoprotein:low-density lipoprotein. At least adequate Se status was crucial for counteracting As-induced oxidative stress. Conclusion: This study is the first to show the potential of high-Se lentils to protect against As-triggered atherosclerosis, and this invites further investigations in human populations at risk from As contamination of their drinking water. Crown Copyright (C) 2015 Published by Elsevier Inc. All rights reserved.