欧盟评估转基因枯草芽孢杆菌菌株LMG S-24584生产的内切-1,4-β-木聚糖酶的安全性

　　

　　据了解，这种食品酶是由转基因枯草芽孢杆菌菌株LMG S-24584生产的，旨在用于谷物的加工，以生产焙烤产品。

　　

　　经过评估，专家小组认为，在预期的使用条件下，不能排除通过饮食接触引起过敏反应的风险，但这种情况发生的可能性很低。根据所提供的数据，小组得出结论，该食品酶在预期的使用条件下不会引起安全问题。部分原文报道如下：

　　

　　The food enzyme endo-1,4-β-xylanase (4-β-d-xylan xylanohydrolase, EC 3.2.1.8) is produced with the genetically modified Bacillus subtilis strain LMG S-24584 by Puratos NV. In a previous opinion, the Panel noted the presence of recombinant DNA in all food enzyme batches tested. As a follow-up, the applicant changed the manufacturing process of the food enzyme and provided new data. The genetic modifications do not give rise to safety concerns and the production strain fulfils the requirements for the QPS approach to safety assessment. The food enzyme is free from viable cells of the production organism and its DNA. It is intended to be used in the processing of cereals and other grains for the production of baked products. Dietary exposure is estimated to be up to 0.010 mg TOS/kg body weight per day in European populations. As no concerns arising from the microbial source and its genetic modifications or from the manufacturing process have been identified, the Panel considered that toxicological tests were not needed for the assessment of this food enzyme. A search for the homology of the amino acid sequence of the food enzyme to known allergens was made and no match was found. The Panel considered that the risk of allergic reactions upon dietary exposure cannot be excluded, but the likelihood 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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