铁死亡在空气污染导致相关疾病中的作用机制研究进展

Research advances in mechanisms of ferroptosis in air pollution-related diseases

  • 摘要: 流行病学研究证实,大气污染物暴露会导致人体不良健康结局,但具体的生物学机制尚不明确。空气污染暴露后,氧化应激已被证实是影响健康的经典调控机制。近年来研究发现,氧化应激导致的脂质过氧化与铁累积共同作用,可诱导调节性细胞死亡,被称为“铁死亡”。因此,铁死亡可能是空气污染物引发不良健康结局的重要机制。为了探究空气污染引发不良健康结局的铁死亡机制,基于已有研究成果,梳理了铁死亡在空气污染导致不良健康结局中的作用靶点,详细探讨了空气污染物诱导铁死亡的调控机制。系统综述结果表明:细颗粒物(PM2.5)、臭氧(ozone,O3)、香烟烟雾(cigarette smoke,CS)均可通过影响铁代谢和脂质过氧化途径中的关键基因诱发铁死亡;大气污染物对铁死亡的调控过程主要是通过引发氧化应激降低机体抗氧化能力,从而降低铁死亡的抗性。本综述结果进一步补充了空气污染诱导疾病的发生机制,可为潜在的疾病治疗策略提供理论支持。

     

    Abstract: Epidemiologic studies have confirmed that air pollutants exposure could result in various adverse health outcomes, but the specific biological mechanism is still unclear. Oxidative stress (OS) induced by air pollution exposure has been confirmed as a classical regulatory mechanism that affects our health. In recent years, it has been found that the combined effect of lipid peroxidation induced by OS and iron accumulation can induce programmed cell death, which has been termed "ferroptosis". Thus, ferroptosis could be an important regulatory mechanism of adverse health outcomes induced by air pollutants exposure. To explore the mechanisms by which air pollution triggers ferroptosis, we reviewed and summarized the targets and regulatory mechanisms of ferroptosis in regulating adverse health outcomes caused by air pollution, based on existing research results. The result showed that fine particulate matter (PM2.5), ozone (O3) and cigarette smoke (CS) could induce ferroptosis by affecting key genes in iron metabolism and lipid peroxidation pathways. In a word, air pollutants could cause OS and reduce the antioxidant capacity, then reduce the resistance of ferroptosis. This review further supplemented the mechanism of air pollution-induced diseases, which could provide theoretical support for potential disease treatment strategies.

     

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