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Valuable ingredients and feed toxicity evaluation of Microcystis aeruginosa acidolysis product in mice

文献类型： 外文期刊

作者： Han, Shiqun 1 ; Zhou, Qing 1 ; Xu, Yudi 1 ; Vanogtrop, Floris 2 ; Guo, Qijin 1 ; Liu, Guofeng 1 ; Yan, Shaohua 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm Sci, Nanjing 210014, Jiangsu, Peoples R China

2.Univ Sydney, Fac Agr & Environm, Sydney, NSW 2006, Australia

关键词： Microcystis aeruginosa;acidolysis;ingredients;feed safety

期刊名称：EXPERIMENTAL BIOLOGY AND MEDICINE （ 影响因子：2.691； 五年影响因子：3.666 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： This research studied the extraction from Microcystis aeruginosa using hydrochloric acid method as a potentially valuable protein resource from eutrophic lakes. Amino acid composition, residual algal toxins, and heavy metals of the acidolysis product were studied. After 18 h of hydrochloric acid treatment, the product of M. aeruginosa contained 17 amino acids, 51.34% of total amino acid requirements, and 30.25% of the livestock and poultry essential amino acid (Eaa). The residual microcystin-LR (MC-LR) was 0.94 mg kg(-1), which was less than WHO drinking water limit of microcystins. The removal ratio of microcystins was higher than 99.99% during the process of hydrolysis. The concentration of heavy metals of the product was in compliance with feed standards. Furthermore, using Horn's method, Mouse Micronucleus Test and Sperm Shape Abnormality Test were conducted to study the forage safety of the product. Half lethal dose (LD50) of acidolysis product in mice was >9.09 g kg(-1) body weight, actually belonging to non-toxic grade. Every dose treatment did not significantly increase activities of alkaline phosphatase (ALP), lactate dehydrogenase (LDH), and g-glutamyltransferase (g-GT). The results of both micronucleus test and sperm shape abnormality test were negative, which suggested the product with no mutagenicity and sperm malformation effects. This study indicated that the acidolysis product of M. aeruginosa was safe to be used as a feed ingredient.

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