Food contamination from natural or anthropogenic sources poses severe risks to human health. It is now largely accepted that continuous exposure to low doses of food Toxins such as mycotoxins, phycotoxins can be relat...Food contamination from natural or anthropogenic sources poses severe risks to human health. It is now largely accepted that continuous exposure to low doses of food Toxins such as mycotoxins, phycotoxins can be related to several chronic diseases, including some type of cancer and serious hormonal dysfunctions. Contemporary analytical methods have the sensitivity required for contamination detection and quantification, but direct application of these methods on real samples can be rarely performed because of matrix complexity. Thus, selective analytical methods, relying on intelligent functional materials are needed. Recent years have seen the increasing use of molecular imprinted polymers in contaminant analysis in food because these materials seem to be particularly suitable for applications where analyte selectivity is essential. It offers several advantages to the agrofood industry in areas such as analysis, sensoring, extraction, or preconcentration of components. It has the potential of becoming a tool for acquiring truly simple, rapid, and robust direct measurements.展开更多
目的探讨原花青素B2(PC-B2)对黄曲霉毒素B1(AFB1)所致人胚胎肝细胞(L-02)DNA损伤及修复基因表达影响。方法取对数期生长良好的L-02细胞随机分为空白对照组、溶剂对照组、PC-B2处理组(3、10、30μg/m L)、AFB1染毒组(10、20、30、40μg/m...目的探讨原花青素B2(PC-B2)对黄曲霉毒素B1(AFB1)所致人胚胎肝细胞(L-02)DNA损伤及修复基因表达影响。方法取对数期生长良好的L-02细胞随机分为空白对照组、溶剂对照组、PC-B2处理组(3、10、30μg/m L)、AFB1染毒组(10、20、30、40μg/m L)和PC-B2干预组(3、10、30μg/m L PC-B2+30μg/m L AFB1),利用噻唑蓝法、酶联免疫吸附法和荧光定量PCR技术分别测定细胞增殖活力、细胞上清液8-羟基脱氧鸟苷(8-OHd G)含量及细胞h OGG1基因表达水平。结果 AFB1可明显抑制L-02细胞增殖活力(P<0.05),呈剂量-效应关系;与溶剂对照组比较,30μg/m L AFB1组细胞活力[(69.9±2.46)%]明显降低(P<0.05),细胞上清中8-OHd G含量[(2.779±0.089)ng/m L]明显升高(P<0.05);与30μg/m L AFB1组比较,3、10、30μg/m L PC-B2干预组细胞活力[分别为(70.6±2.67)%、(69.7±1.94)%、(82.4±1.58)%]明显升高(P<0.05),细胞上清中8-OHd G含量[分别为(2.550±0.078)、(2.376±0.109)、(1.873±0.065)ng/m L]明显降低(P<0.05);与溶剂对照组比较,30μg/m L AFB1组L-02细胞h OGG1基因表达减少(P<0.05);与30μg/m L AFB1组比较,PC-B2干预组L-02细胞h OGG1表达明显升高。结论 PC-B2可提高肝细胞增殖活力,抑制AFB1所致肝细胞DNA损伤,其机制可能与调控修复基因h OGG1表达有关。展开更多
文摘Food contamination from natural or anthropogenic sources poses severe risks to human health. It is now largely accepted that continuous exposure to low doses of food Toxins such as mycotoxins, phycotoxins can be related to several chronic diseases, including some type of cancer and serious hormonal dysfunctions. Contemporary analytical methods have the sensitivity required for contamination detection and quantification, but direct application of these methods on real samples can be rarely performed because of matrix complexity. Thus, selective analytical methods, relying on intelligent functional materials are needed. Recent years have seen the increasing use of molecular imprinted polymers in contaminant analysis in food because these materials seem to be particularly suitable for applications where analyte selectivity is essential. It offers several advantages to the agrofood industry in areas such as analysis, sensoring, extraction, or preconcentration of components. It has the potential of becoming a tool for acquiring truly simple, rapid, and robust direct measurements.
文摘目的探讨原花青素B2(PC-B2)对黄曲霉毒素B1(AFB1)所致人胚胎肝细胞(L-02)DNA损伤及修复基因表达影响。方法取对数期生长良好的L-02细胞随机分为空白对照组、溶剂对照组、PC-B2处理组(3、10、30μg/m L)、AFB1染毒组(10、20、30、40μg/m L)和PC-B2干预组(3、10、30μg/m L PC-B2+30μg/m L AFB1),利用噻唑蓝法、酶联免疫吸附法和荧光定量PCR技术分别测定细胞增殖活力、细胞上清液8-羟基脱氧鸟苷(8-OHd G)含量及细胞h OGG1基因表达水平。结果 AFB1可明显抑制L-02细胞增殖活力(P<0.05),呈剂量-效应关系;与溶剂对照组比较,30μg/m L AFB1组细胞活力[(69.9±2.46)%]明显降低(P<0.05),细胞上清中8-OHd G含量[(2.779±0.089)ng/m L]明显升高(P<0.05);与30μg/m L AFB1组比较,3、10、30μg/m L PC-B2干预组细胞活力[分别为(70.6±2.67)%、(69.7±1.94)%、(82.4±1.58)%]明显升高(P<0.05),细胞上清中8-OHd G含量[分别为(2.550±0.078)、(2.376±0.109)、(1.873±0.065)ng/m L]明显降低(P<0.05);与溶剂对照组比较,30μg/m L AFB1组L-02细胞h OGG1基因表达减少(P<0.05);与30μg/m L AFB1组比较,PC-B2干预组L-02细胞h OGG1表达明显升高。结论 PC-B2可提高肝细胞增殖活力,抑制AFB1所致肝细胞DNA损伤,其机制可能与调控修复基因h OGG1表达有关。
