新兴的真菌毒素Versicolorin A的变异性和基因毒性评估,这是阿弗拉托克素B1前体
Carine Al-Ayoubi1, Maria Alonso-Jauregui2, Amaya Azqueta2
1Toxalim (Research Centre in Food Toxicology), University of Toulouse, INRAE, ENVT, INP-Purpan, UPS, 31027, Toulouse, France.
Environmental pollution (Barking, Essex : 1987)
|July 30, 2023
概括
弗西色素A (VerA) 是阿弗拉托辛B1的前体,即使在低度下,也会导致DNA损伤和点突变. 这种新兴的食物污染物是新兴的食物污染物.
科学领域:
- 毒理学 毒理学 毒理学
- 菌毒素研究 菌毒素研究
- 食品安全 食品安全
背景情况:
- 非洲毒素B1 (AFB1) 是一种强有力的致癌物.
- 色素A (VerA) 是AFB1.1的生物合成前体.
- 关于VerA毒性的数据有限,特别是在低剂量时.
研究的目的:
- 调查Versicolorin A (VerA) 的基因毒性和破坏DNA的影响.
- 评估VerA对细胞DNA修复机制的影响.
主要方法:
- 使用沙门氏菌Typhimurium菌株进行SOS/umu和小型化的Ames测试.
- 在肠道细胞中的微核测定 (IPEC-1).
- 标准和酶修改的彗星测定.
- 对DNA修复生物标记物的分析 (γH2AX,53BP1/FANCD2).
主要成果:
- 维拉诱导点突变和染色体损伤.
- 在低至0.03μM的度下观察到DNA损伤.
- 代谢激活对于VerA的基因毒性作用至关重要.
- 暴露于VerA激活了DNA修复通路.
结论:
- VerA是一种基因毒性化合物,在低度时会诱导DNA损伤,但不会影响细胞活力.
- 作为一种新兴的食品污染物,VerA具有潜在的风险.
- 对VerA的致癌性进行进一步的研究是有必要的.
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