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首页> 外文期刊>World Mycotoxin Journal >Evaluation of zearalenone, alpha-zearalenol, beta-zearalenol, zearalenone 4-sulfate and beta-zearalenol 4-glucoside levels during the ensiling process
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Evaluation of zearalenone, alpha-zearalenol, beta-zearalenol, zearalenone 4-sulfate and beta-zearalenol 4-glucoside levels during the ensiling process

机译：保鲜过程中评估玉米赤霉烯酮，α-玉米赤霉烯醇，β-玉米赤霉烯醇，4-硫酸玉米赤霉烯酮和β-玉米赤霉烯醇4-葡萄糖苷水平

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Zearalenone-producing Fusarium species can contaminate maize before ensiling and cause reproductive problems in animals. Suspect feeds are only routinely analysed for zearalenone (ZEA), not considering other oestrogenic metabolites or masked derivatives. The aims of the present study were to monitor the levels of ZEA, alpha-zearalenol (alpha-ZOL), beta-zearalenol (beta-ZOL), zearalenone-4-sulfate (ZEA-4S) and beta-zearalenol-4-glucoside (beta-ZOL-4G) in artificially contaminated maize silage and determine the effect of the ensiling process on these toxins. A laboratory silo model was designed using polystyrene bags filled with previously contaminated chopped whole-plant maize, stored in a dry and cool room and sampled at days 7, 45, 90, 120 and 127. ZEA, alpha-ZOL, beta-ZOL, ZEA-4S and beta-ZOL-4G levels were quantified by liquid chromatography - tandem mass spectrometry. Chemical and physical analysis indicated silage maintained good quality in all stages. pH was reduced favourably (P<0.05) from 4.69 to 3.80 during the preservation stage. Dry matter, moisture content and water activity did not vary from day 7 to 127. ZEA, alpha-ZOL, beta-ZOL and ZEA-4S levels also did not change from day 7 to 127, indicating no significant degradation by the ensiling process or silage-native microbiota. This study suggests that ZEA levels remain invariable during the ensiling process, as well as the levels of its derivatives. The presence of highly oestrogenic metabolites, like alpha-ZOL and the masked ZEA-4S, which are not screened in the routine analyses, increases the overall toxicity of ZEA-contaminated silage
机译：生产玉米赤霉烯酮的镰刀菌可能在包住之前污染玉米，并引起动物繁殖问题。仅对可疑饲料中的玉米赤霉烯酮（ZEA）进行常规分析，而不考虑其他雌激素代谢物或掩盖衍生物。本研究的目的是监测ZEA，α-玉米赤霉烯醇（α-ZOL），β-玉米赤霉烯醇（β-ZOL），玉米赤霉烯酮-4-硫酸盐（ZEA-4S）和β-玉米赤霉烯醇-4-葡萄糖苷的水平（β-ZOL-4G）在人工污染的玉米青贮饲料中的含量，并确定包埋过程对这些毒素的影响。实验室筒仓模型的设计是使用装有预先污染的切碎的全植物玉米的聚苯乙烯袋包装，将其储存在干燥阴凉的房间中，并在第7、45、90、120和127天取样。通过液相色谱-串联质谱法定量ZEA-4S和β-ZOL-4G水平。化学和物理分析表明青贮饲料在所有阶段均保持良好的品质。在保存阶段，pH值从4.69有利地降低（P <0.05）至3.80。从第7天到127天，干物质，水分含量和水分活度没有变化。从第7天到127天，ZEA，α-ZOL，β-ZOL和ZEA-4S的含量也没有变化，表明包衣过程或青贮天然菌群。这项研究表明，ZEA的水平及其衍生衍生物的水平在加成过程中保持不变。常规分析中未筛选的高雌激素代谢物（如α-ZOL和掩蔽的ZEA-4S）的存在会增加受ZEA污染的青贮饲料的总体毒性

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