菌性亚那托克辛-a在体外没有诱导发育性神经毒性,但在与全转化网红酸共同暴露时会改变基因表达模式
Barbara Kubickova1, Sarka Martinkova1, Dasa Bohaciakova2
1RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, Brno, Czech Republic.
Toxicology letters
|December 9, 2023
概括
蓝藻细菌的开花释放的神经毒素,如阿纳毒素-a. 这项研究发现,单独使用阿纳托克辛-A 不会引起发育性神经毒性,但与全转网红酸结合时会损害胆能神经元分化.
科学领域:
- 环境毒理学环境毒理学
- 神经科学是一个神经科学.
- 发育生物学是发展生物学.
背景情况:
- 在全球范围内,蓝藻细菌的繁殖正在增加,影响着水资源.
- 这些花会产生神经毒素,包括亚纳毒素a,以及生物活性代谢物,如视网类药物.
- 人类神经干细胞为研究毒素对神经发育的影响提供了一个模型.
研究的目的:
- 为了研究毒素-a对分化人类神经干细胞的影响.
- 评估单独和与视网酸一起使用的阿纳托克辛-a的潜在发育神经毒性.
- 评估对神经和质分化标记物的影响.
主要方法:
- 使用了体外人类神经干细胞模型.
- 暴露于亚纳托克辛-a (单独或与全转化网红酸) 的细胞9天或18天.
- 分析了神经和质分化生物标志物的蛋白质和基因表达.
主要成果:
- 单独的阿纳托克辛-a并没有诱导明显的发育神经毒性.
- 与全转化网红酸同时暴露没有显著的神经毒性影响.
- 在1000nM时,与200nM全转录氨酸酸共同暴露的亚纳托克辛-a降低了乙胆能神经元亚型差异化.
结论:
- 毒素-a似乎不会独立引起发育神经毒性.
- 与全转网红酸的联合暴露可能会损害特定的神经元亚型的发育.
- 研究结果表明,对神经系统发育有潜在的功能影响,特别是对胆固醇神经元.
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