多可沙赫萨酸及其代谢产物能防止臭氧引起的肺炎
Michael J Yaeger1, Tyson Ngatikaura2, Natali Zecchino1
1The Ohio State University Wexner Medical Center, Columbus, Ohio, United States.
American journal of respiratory cell and molecular biology
|April 10, 2025
概括
饮食中的多可萨赫萨酸 (DHA) 通过增加专门的亲溶解媒介 (SPMs) 来保护肺部免受臭氧 (O3) 空气污染. 这种饮食方法可以减少炎症,并增强臭氧暴露后的肺部恢复.
科学领域:
- 环境健康 环境健康
- 营养科学 营养科学
- 肺部病理学 肺部病理学
背景情况:
- 臭氧 (O3) 是一种有害的空气污染物,会引起肺炎并加剧慢性肺病.
- 预计随着全球变暖,环境O3水平将增加.
- 作为一种omega-3脂肪酸的多可萨赫萨酸 (DHA) 具有由专门的亲溶解介质 (SPMs) 介导的抗炎性质.
研究的目的:
- 调查饮食DHA补充剂是否能保护肺部免受O3诱导的炎症和损伤.
- 为了确定DHA补充是否增强肺SPM的产生,并减少O3诱导的炎症.
主要方法:
- 在6周的时间里,小鼠接受了对照或DHA丰富的饮食.
- 小鼠被暴露在过空气或1ppm O3中3小时.
- 肺炎标志物,细胞因子生产和氧利平因型被分析在暴露后的24小时和48小时.
主要成果:
- 补充DHA显著降低了O3诱导的中性恋和肺部促炎性细胞因子的产生.
- 饮食DHA增加了肺部DHA及其SPM,同时降低了促炎性氧利平.
- 服用DHA衍生氧利平 (14-HDHA或MaR1) 模仿了饮食中的DHA的保护作用.
结论:
- 饮食中的DHA通过增加肺SPMs,特别是14-HDHA和MaR1.1,保护肺部免受O3诱导的炎症.
- 这些SPM通过抑制巨细胞中性粒细胞化学因子的产生来减少中性粒细胞的招募.
- 饮食中的DHA代表了减轻空气污染引起的肺炎的潜在治疗策略.
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