期刊
FOOD AND CHEMICAL TOXICOLOGY
卷 65, 期 -, 页码 1-11出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fct.2013.12.010
关键词
beta-Carotene; Yarrowia lipolytica; Subchronic; Toxicity; GenotoXitity
Crystalline beta-carotene from genetically modified Yarrowia lipolytica is an alternative source of beta-carotene for use as a nutritional supplement. To support the use of beta-carotene from Y. lipolytica as a food ingredient, the genotoxic and subchronic toxicity potential of this compound was determined. Genotoxicity was examined using Salmonella typhimurium and Escherichia coli (Ames test), a chromosomal aberration assay in Chinese Hamster Ovary WBL cells, and the micronucleus test in CD-1 mice. All three assays showed no significant results due to beta-carotene from Y. lipolytica. In a subchronic toxicity study in SD rats, beta-carotene from Y. lipolytica was administered by oral gavage for 13 weeks at 0, 125, 250 or 500 mg/kg per day. Adverse effects were not observed following clinical, clinical pathology and gross- and histopathological evaluations of dosed rats; thus, the no-observed-adverse effect level (NOAEL) for beta-carotene from Y. lipolytica was 500 mg/kg, the highest dose used in the study. In conclusion, beta-carotene derived from Y. lipolytica was shown in genotoxicity models and a standard rat subchronic rat study to have a safety profile similar to that of the current commercial products (synthetic and natural) with no unexpected finding attributable to the alternative source. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据