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    In the present study, a novel transgenic rice line T1c-19 carrying cry1C* gene was evaluated in Sprague-Dawley (SD) rats by a 52-week feeding study, aiming at determining its unintended effects. The rice T1c-19 and its parental rice were prepared at a level of up to 60.75% in the growth diet and 66.75% in the maintenance diet, respectively. AIN-93 diet was used as a nutritional control. All the diets were nutritionally balanced. Each group, with 48 rats of both genders, was fed the corresponding diet for 52 weeks. The results of clinical signs, body weight and food consumption of the transgenic rice group were comparable to those of the parental rice group. Clinical measurements were made on weeks 13, 26 and 52, and statistical significances were observed in several hematological and serum biochemical indices between the two rice groups and were not considered as treatment-related. The terminal histopathological examination showed some spontaneous lesions in all groups with no significant difference among them. Taken together, the results of the present 52-week chronic toxicity study of transgenic rice T1c-19 exerted no unintended adverse effects on SD rats. Copyright © 2020 Elsevier Ltd. All rights reserved.

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    Xiaoqiao Tang, Yangfeng Wang, Lanjie Pei, Wenxiang Yang, Jun Fan, Qin Zhuo, Xiaoguang Yang, Zhou Yu, Xudong Jia, Jiafa Liu, Bolin Fan. Chronic toxicity study in Sprague-Dawley rats on transgenic rice T1c-19 with cry1C* gene. Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association. 2020 Jun;140:111324

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    PMID: 32283201

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