聚乙烯微塑料加速Caenorhabditis elegans的衰老,通过与铁死相关的胰岛素信号通路
Yunjiang Yu1,2, Shihui Tan2, Hongzhi Guo2
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Environmental science & technology
|January 30, 2026
概括
环境光衰老的微塑料通过破坏胰岛素信号传递和诱导铁亡来加速生物的衰老. 由于毒性增加,这些老化微塑料比原始微塑料对健康构成更大的风险.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 衰老研究研究 衰老研究
背景情况:
- 微塑料 (MP) 是普遍存在的环境污染物.
- 由于环境因素 (如光衰老) 而导致国会议员的衰老过程尚不清楚.
- 摄影老化MP对生物体衰老和分子机制的影响需要研究.
研究的目的:
- 研究光衰老聚烯微塑料对*Caenorhabditis elegans*老化的影响.
- 为了阐明的分子途径背后的毒性,照片老化MPs.
- 为了比较处女国会议员与照相成年国会议员的衰老效应.
主要方法:
- 暴露于各种度的处女 (PS-0) 和光衰老 (PS-45) 聚烯微塑料中的 *C. elegans*.
- 评估寿命,生理行为,脂素积累和颗粒吸收.
- 对胰岛素/IGF-1信号通路基因表达和铁亡标记物的分析.
- 在关键的衰老和铁灭基因中利用了基因突变.
主要成果:
- 摄影年龄的国会议员表现出改变的物理化学性质.
- 处女和照相成年的国会议员都缩短了寿命和行为障碍,照相成年的国会议员显示出更强烈的效应.
- 光衰老的MP增加了自由基生成,粒子积累,抑制了DAF-16核转位,以及失调的胰岛素/IGF-1信号传递.
- 摄影老化MP诱导铁亡,其证据是铁的增加,脂质过氧化,谷氨酸的减少和*ftn-1*表达的改变.
- 基因突变调节了MP诱导的衰老和铁亡.
结论:
- 摄影老化微塑料的老化风险比原始的MP更大.
- 在MP诱导的衰老中,发现了胰岛素信号和铁亡之间的机械联系.
- DAF-2-AGE-1-PDK-1-AKT-DAF-16-FTN-1通路是光老化MP毒性的核心.
- 摄影老年国会议员代表了一个高度的环境健康问题.
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