甲基酸抑制了阿弗拉托克辛的产生,并调节了阿斯伯吉卢斯黄菌的基因表达
1Department of Food Toxicology and Contaminant, National Research Centre, Dokki, Giza, Egypt. eldesoukyt@yahoo.com.
Scientific reports
|July 10, 2025
概括
甲基酸 (PCA) 有效地抑制了像阿斯伯吉卢斯 (Aspergillus flavus) 这样的真菌产生的有毒亚毒素. 这种天然化合物有望改善食品安全,并保护收获后作物免受污染.
科学领域:
- 食品科学 食品科学 食品科学
- 菌类学 菌类学是指菌类学.
- 自然产品化学 自然产品化学
背景情况:
- 青毒素,特别是青毒素B1 (AFB1),是由阿斯伯吉勒斯菌种产生的致癌性菌毒素.
- AFB1污染对人类健康和粮食安全构成重大风险.
- 需要有效的策略来控制毒菌性真菌和AFB1的产生.
研究的目的:
- 为了研究Protocatechuic Acid (PCA) 的抗真菌和抗毒素的潜力.
- 评估PCA在菌毒性Aspergillus物种和AFB1生产中的疗效,试验室和收获后的玉米.
主要方法:
- 使用抑制区测定对阿斯伯吉卢斯物种进行抗真菌活性评估.
- AFB1的产量用液体介质量化.
- 使用RT-qPCR分析了AFB1生物合成途径基因 (nor-1,omt-A) 的基因表达.
- 评估了PCA对收割后玉米粒的疗效,以控制AFB1污染.
主要成果:
- PCA对阿斯伯吉勒斯菌种,包括A. flavus和A. ochraceus,表现出显著的剂量依赖的抗真菌活性.
- 在液体培养中,PCA显著降低了AFB1的产量,高达80.21%,并减少了A. flavus菌重量60.8%.
- PCA降低了关键的AFB1生物合成基因 (nor-1增加95%,omt-A减少74%) 的下调,并有效降低了玉米粒中的AFB1污染 (高达64.6%).
结论:
- 普罗托卡特丘酸显示出强大的抗真菌和抗亚弗拉托克西基因性质.
- 通过降低AFB1生物合成途径中关键基因的调节,PCA起作用.
- PCA是一种有前途的天然剂,可以提高食品安全,控制收获后的亚拉托克辛污染.
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