Se-Ca联合膳食干预缓解Cd诱导小鼠肝肾毒性

Alleviating cadmium toxicity to liver and kidney of mice with dietary supplementation of selenium and calcium in combination

为探究Se-Ca联合膳食干预对生物Cd中毒的缓解效果,选取88只BALB/c小鼠,随机划分为19组,在相同饲料Cd暴露浓度下(2mg/kg)分别设置低、中、高浓度的Se和Ca单独和联合膳食干预处理,并观察30d后小鼠的生长发育、肝肾功能、氧化应激状态和组织病理变化.结果显示,Se-Ca联合干预可有效缓解Cd蓄积所致小鼠生长发育迟缓现象,且进一步促进小鼠生长;肝肾功能及氧化应激指标测定结果表明,Se-Ca联合干预对Cd暴露下小鼠肝脏AST、GSH、SOD、GSH-Px和肾脏BUN、MDA、SOD的保护效果优于单一元素干预;联合干预仅需较小剂量即可达到单独Se或Ca干预对肝肾病理损伤的最佳缓解效果.Se-Ca联合膳食干预可有效缓解Cd摄入导致的生长发育缓慢和肝肾毒性,且较之单一元素的干预效果更佳.

To explore the mitigation role of dietary selenium(Se) and calcium(Ca) supplementation in combination in alleviating the biological toxicity of Cd, an in vivo mouse bioassay was performed. Mice(BALB/c, n = 88) that were exposed to Cd via diets at the same concentration of 2 mg/kg were randomly divided to 19 groups of dietary supplementation of low, medium, and high concentrations of Se and Ca in diets alone or in combination. The growth and development of mice, liver and kidney function,oxidative stress state and histopathological changes of the mice were measured after 30 days of intervention. Results showed that the combined intervention of Se-Ca could effectively alleviate the growth retardation of mice caused by Cd exposure. In terms of liver and kidney function and oxidative stress, the combined intervention had a stronger protective effect on AST, GSH, SOD, GSH-Px in the liver and BUN, MDA and SOD in the kidney of mice than single Se or Ca intervention. Additionally, a lower dietary concentration of Se and Ca in combination alleviated pathological damage at a similar extent to that of a high concentration of Se or Ca alone. In general, Se-Ca dietary intervention in combination effectively alleviated the growth retardation and liver and kidney toxicity of mice caused by Cd exposure, and the effect was stronger than that of single element intervention.