Luo Xiaohu, Zhai Yuheng, Qi Lijun, Pan Lihong, Wang Jing, Xing Jiali, Wang Ren, Wang Li, Zhang Qingchuan, Yang Kai, Chen Zhengxing
Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing 100048, China.
National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, China.
Foods. 2020 Mar 24;9(3):376. doi: 10.3390/foods9030376.
Electron beam irradiation (EBI) has high energy, no induced radioactivity, and strong degradation capacity toward mycotoxins, such as zearalenone (ZEN) and ochratoxin A (OTA). In this study, we determined EBI's influence on the physical and chemical properties of corn contaminated with ZEN and OTA. Moreover, the toxicity of corn after EBI was assessed through a mouse experiment. Amylose content and starch crystallinity in corn decreased significantly ( < 0.05) at an irradiation dose higher than 20 kGy. Scanning electron microscopy results revealed that the starch particles of corn began to be crushed at 10 kGy. Essential and total amino acid contents in corn decreased significantly with increasing irradiation dose of EBI ( < 0.05). Feeding EBI-treated corn fodders to mice could significantly improve blood biochemical indexes. The EBI-treated group was not significantly different from the normal corn group and did not display histopathological changes of the liver. EBI treatment can influence the quality of corn to some extent and effectively lower the toxicity of ZEN and OTA in contaminated corn. The results provide a theoretical and practical basis for the processing of EBI-treated corn and its safety.
电子束辐照（EBI）具有能量高、无诱导放射性以及对玉米赤霉烯酮（ZEN）和赭曲霉毒素A（OTA）等霉菌毒素降解能力强的特点。在本研究中，我们测定了EBI对受ZEN和OTA污染的玉米理化性质的影响。此外，通过小鼠实验评估了EBI处理后玉米的毒性。当辐照剂量高于20 kGy时，玉米中的直链淀粉含量和淀粉结晶度显著降低（<0.05）。扫描电子显微镜结果显示，玉米淀粉颗粒在10 kGy时开始被粉碎。随着EBI辐照剂量的增加，玉米中的必需氨基酸和总氨基酸含量显著降低（<0.05）。给小鼠喂食经EBI处理的玉米饲料可显著改善血液生化指标。EBI处理组与正常玉米组无显著差异，且未出现肝脏组织病理学变化。EBI处理可在一定程度上影响玉米品质，并有效降低受污染玉米中ZEN和OTA的毒性。研究结果为EBI处理玉米的加工及其安全性提供了理论和实践依据。
