埃莫丁破坏了Notch1/Nrf2/GPX4抗氧化系统,并促进细胞铁亡
Journal of applied toxicology : JAT
|July 2, 2023
概括
埃莫丁通过诱导铁,一个涉及铁积累和氧化应激的过程,引起毒性. 这通过抑制Notch1/Nrf2/glutathione过氧化酶4通路而发生,突出了emodin诱导的毒性的一种新机制.
科学领域:
- 毒理学 毒理学 毒理学
- 细胞生物学 细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 埃莫丁表现出各种药理作用,但在高剂量时可能导致脏毒性.
- 埃莫丁诱导的毒性背后的确切机制,特别是氧化应激和铁亡的作用,仍然不清楚.
研究的目的:
- 为了调查氧化应激和铁死在埃莫丁诱导的毒性中的参与.
- 为了阐明分子机制,特别是Notch1/Nrf2/glutathione过氧化酶4信号通路,在emodin毒性.
主要方法:
- 用emodin治疗小鼠,以在体内评估损伤和生化标志物.
- NRK-52E细胞暴露于以诺奇1,Akt或Nrf2通路为目标的干预或不干预的埃莫丁.
- 评估的标记物包括氧化应激指标,铁含量,细胞活力,线粒体膜潜力和关键蛋白质表达.
主要成果:
- 在体内以埃莫丁治疗增加了血尿素,血清肌素,马隆迪甲基和Fe2+,同时降低了超氧化物转化酶和谷氨,导致病理.
- 在体外,埃莫丁降低了细胞活力,增加了铁的积累,反应性氧物种和脂质过氧化,以及去极化了线粒体膜潜力.
- 埃莫丁降低了诺奇1活性,Nrf2核转位和谷氨过氧化酶4水平的调节,这表明该途径受阻.
结论:
- 埃莫丁诱导的脏毒性是由铁死中介的,其特点是铁的积累和氧化损伤.
- 诺奇1/Nrf2/谷氨酸过氧化酶4轴在保护免受埃莫丁诱导的铁亡和随后的毒性方面发挥着至关重要的作用.
- 准Notch1/Nrf2通路可能提供一种治疗策略,以减轻与emodin相关的损伤.
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