Issue 24, 2021

Sesamin attenuates PM2.5-induced cardiovascular injury by inhibiting ferroptosis in rats

Abstract

Objective: This study aimed to elucidate the pharmacological effects of sesamin (Ses) and its mechanism of action towards PM2.5-induced cardiovascular injuries. Method: Forty Sprague Dawley (SD) rats were randomly divided into five groups: a saline control group; a PM2.5 exposure group; and low-, middle-, and high-dose Ses pretreatment groups. The SD rats were pretreated with different concentrations of Ses for 21 days. Afterward, the rats were exposed to ambient PM2.5 by intratracheal instillation every other day for a total of three times. The levels of inflammatory markers, including tumor necrosis factor-alpha (TNF-α), interleukin-1beta (IL-1β), and interleukin-6 (IL-6), and indicators related to oxidative responses, such as total superoxide dismutase (SOD), reduced glutathione (GSH), glutathione peroxidase (GSH-Px), and malondialdehyde (MDA), were measured in the blood and heart. The expression of ferroptosis-related proteins in heart tissues was determined via western blot and immunohistochemistry. Results: Ses pretreatment substantially ameliorated cardiovascular injuries in rats as evidenced by the decrease in the pathological score and collagen area. The decreased levels of SOD, GSH, and GSH-Px in the heart and serum were inhibited by Ses. In addition, Ses not only notably increased the activity of antioxidant enzymes but also reduced the levels of MDA, CK, LDH, CK-MB, IL-6, TNF-α, IL-1β, and IL-6. Furthermore, Ses pretreatment upregulated the expression levels of GPX4, SLC7A11, TFRC, and FPN1 and inhibited the expression levels of FTH1 and FTL. Conclusion: Ses pretreatment could ameliorate PM2.5-induced cardiovascular injuries perhaps by inhibiting ferroptosis. Therefore, Ses pretreatment may be a novel strategy for the prevention and treatment of PM2.5-induced cardiovascular injury.

Graphical abstract: Sesamin attenuates PM2.5-induced cardiovascular injury by inhibiting ferroptosis in rats

Article information

Article type
Paper
Submitted
02 Sep 2021
Accepted
05 Nov 2021
First published
09 Nov 2021
This article is Open Access
Creative Commons BY license

Food Funct., 2021,12, 12671-12682

Sesamin attenuates PM2.5-induced cardiovascular injury by inhibiting ferroptosis in rats

J. Ren, B. Yin, X. Li, S. Zhu, J. Deng, Y. Sun, Z. Zhang, Z. Guo, H. Pei, F. Zhang, R. Li, F. Chen and Y. Ma, Food Funct., 2021, 12, 12671 DOI: 10.1039/D1FO02913D

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