Effects of Dietary Pb on Accumulation, Histopathology, and Digestive Enzyme Activities in the Digestive System of Tilapia (Oreochromis niloticus)

文献类型： 外文期刊

第一作者： Liu, Huitao

作者： Liu, Huitao;Dai, Wei;Du, Huahua;Jin, Chengguan;Xu, Zirong;Dai, Wei;Fu, Linglin;Liu, Huitao

作者机构：

关键词： Tilapia;Dietary lead;Accumulation;Digestive enzyme

期刊名称：BIOLOGICAL TRACE ELEMENT RESEARCH （ 影响因子：3.738； 五年影响因子：3.44 ）

ISSN： 0163-4984

年卷期： 2009 年 127 卷 2 期

页码：

收录情况： SCI

摘要： With the increasing occurrence of dietary lead (Pb) contamination in aquatic environment, threat of the dietary Pb toxicity to aquatic organisms attracted more attention. In this study, after being exposed to dietary Pb at concentrations of 0, 100, 400, and 800-mu g/g dry weight for 60 days, the groups of tilapia (Oreochromis niloticus) were sacrificed and sampled to analyze the effects of dietary Pb on accumulation, histopathology, and digestive enzyme activities in tissues of the digestive system. The results showed that the Pb accumulation in tissues increased with the dietary Pb concentrations. Moreover, Pb accumulated in sampled tissues in the following order: intestine > stomach > liver. By observation of liver histological sections in optical microscope, lesions could be detected in the Pb-contaminated groups. It was also demonstrated that the inhibitory effect of dietary Pb on digestive enzyme activities was dietary Pb concentration dependent. Different degrees of inhibition of enzyme activities were exhibited in sampled tissues. It was indicated that digestive enzyme activities in the digestive system might be considered as the potential biomarkers of dietary Pb contamination in tilapia.

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