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Chemosphere. 2017 Apr;173:14-21. doi: 10.1016/j.chemosphere.2017.01.042. Epub 2017 Jan 8.

Combined effects of vitamin E and omega-3 fatty acids on protecting ambient PM2.5-induced cardiovascular injury in rats.

Author information

1
Department of Environmental Health, School of Public Health and the Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032, China.
2
Department of Cardiology, Xinhua Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, 200092, China.
3
Nutritional Product R&D, DSM (China) Ltd, Shanghai, 201203, China.
4
Department of Environmental Health, School of Public Health and the Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai, 200032, China. Electronic address: jinzhuozhao@fudan.edu.cn.

Abstract

OBJECTIVE:

This study aims to observe whether the combined treatment with vitamin E (vit E) and omega-3 polyunsaturated fatty acids (Ω-3 FA) could prevent the fine particulate matter (PM2.5)-induced cardiovascular injury through alleviating inflammation and oxidative stress. At the same time, the appropriate combination dosage of vit E and Ω-3 FA was explored to find an optimized protective dose to protect the injury induced by PM2.5.

METHODS:

The SD rats were pretreated with different concentration of vit E and Ω-3 FA separately or jointly. Then the rats were exposed to ambient PM2.5 by intratracheal instillation for three times. The expression of tumor necrosis factor α (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6) in serum and supernatant of cardiac tissue were detected by ELISA kits. The levels of malondialdehyde (MDA), superoxide Dismutase (SOD) and glutathione-peroxidase (GSH-Px) in myocardium and the level of MDA in serum were measured. Meanwhile, the cardiac injury was evaluated by histopathological examination.

RESULTS:

Compared with the severe injury of rats in PM2.5 exposure group, the rats in vit E or Ω-3 FA-pretreated groups had a slighter injury in heart. Meanwhile, pretreatment with vit E or Ω-3 FA induced a significantly alleviation of the inflammatory cytokines (TNF-α, IL-1β, IL-6) and the elevation of the anti-oxidative activity especially in the rats pretreated with combined vit E and Ω-3 FA. In addition, the combined protecting effects of vit E and Ω-3 FA showed a dose-dependent manner.

CONCLUSION:

Supplementation with vit E and Ω-3 FA could protect the PM2.5-induced injury, and the combination of vit E and Ω-3 FA might produce more effective effects than the separate nutrient did.

KEYWORDS:

Fine particulate matter; Inflammation; Omega-3 polyunsaturated fatty acids; Oxidative stress; Vitamin E

[Indexed for MEDLINE]

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