Quantitative carcinogenesis and dosimetry in rainbow trout for aflatoxin B1 and aflatoxicol, two aflatoxins that form the same DNA adduct
作者:George S. Bailey、Patricia M. Loveland、auCliff Pereira、Donald Pierce、Jerry D. Hendricks、John D. Groopman
DOI:10.1016/0165-1161(94)90030-2
日期:1994.8
incidence). By molecular dosimetry analysis (logit [incidence] vs. In [DNA adducts]), the two data sets were coincident, indicating that, per DNA adduct formed in vivo in total embryonic DNA, these two aflatoxins were equally efficient in tumor initiation. By dietary fry exposure, both carcinogens produced linear DNA binding dose responses in liver, but with an AFL target organ DNA binding index only 1
两种暴露方案用于建立虹鳟鱼中黄曲霉毒素B1(AFB1)和黄曲霉酚(AFL)的体内肝致癌性和DNA加合的完整剂量反应关系。通过被动卵暴露,AFL的吸收率不及AFB1,但更有效地被螯合到胚胎本身中,从而产生与致癌物剂量呈线性关系且DNA结合指数比AFB1大三倍的胚胎DNA结合曲线。两种黄曲霉毒素均产生相同的表型反应,主要是混合性肝细胞/胆管细胞癌。对数[发生率]与[剂量]的肿瘤反应是平行偏移,非线性反应,显示在所有检查剂量下,AFL的致癌效力都高出三倍(即,AFB1的三倍于产生同等肝脏所需的AFL)肿瘤发生率)。通过分子剂量分析(logit [incidence] vs. [DNA adducts]),这两个数据集是重合的,这表明,在体内总胚胎DNA中形成的每个DNA加合物中,这两种黄曲霉毒素在肿瘤起始中同样有效。通过食物油炸暴露,两种致癌物在肝脏中均产生线性的DNA结合剂量反应,但通过该暴露