欧盟评估转基因米曲霉菌株MUCL44346生产的菊粉酶的安全性

 

　　据了解，这种食品酶是由转基因米曲霉菌株MUCL 44346生产的，旨在用于从菊苣根提取的菊粉中生产低聚果糖。

 

　　经过评估，专家小组认为，在预期的使用条件下，不能排除饮食暴露引起过敏反应的风险，尤其是对番茄过敏的个体。根据所提供的数据，评估小组得出结论，这种食品酶在预期使用条件下不会引起安全问题。部分原文报道如下：

 

　　The food enzyme inulinase (1-β-d-fructan fructanohydrolase; EC 3.2.1.7) is produced with the genetically modified Aspergillus oryzae strain MUCL 44346 by PURATOS NV. The genetic modifications do not give rise to safety concerns. The food enzyme is free from viable cells of the production organism and its DNA. It is intended to be used in the production of fructo-oligosaccharides (FOS) from inulin extracted from chicory roots. Dietary exposure to the food enzyme–total organic solids (TOS) was estimated to be up to 0.01 mg TOS/kg body weight (bw) per day in European populations. Genotoxicity tests did not indicate a safety concern. The systemic toxicity was assessed by means of a repeated dose 90-day oral toxicity study in rats. The Panel identified a no observed adverse effect level (NOAEL) of 100 mg TOS/kg bw per day, which when compared with the estimated dietary exposure, resulted in a margin of exposure of at least 10,000. A search for the similarity of the amino acid sequence of the food enzyme to known allergens was made and two matches were found with tomato allergens. The Panel considered that, under the intended conditions of use, the risk of allergic reactions upon dietary exposure to this food enzyme, particularly in individuals sensitised to tomato, cannot be excluded. However, the likelihood of allergic reactions is expected not to exceed the likelihood of allergic reactions to tomato. As the prevalence of allergic reactions to tomato is low, also the likelihood of such reactions to occur to the food enzyme is low. based on the data provided, the Panel concluded that this food enzyme does not give rise to safety concerns under the intended conditions of use.

 

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