Development of Sensitive Immunoassays for the Detection of the Glucuronide Conjugate of 3-Phenoxybenzyl Alcohol, a Putative Human Urinary Biomarker for Pyrethroid Exposure
作者:Hee-Joo Kim、Ki Chang Ahn、Seung Jin Ma、Shirley J. Gee、Bruce D. Hammock
DOI:10.1021/jf063282g
日期:2007.5.1
The lowest IC50 value (0.5 ng/mL) was obtained with antiserum 1891 and 3-phenoxybenzoic acid-BSA conjugate as the coating antigen. Antiserum 1891 was highly selective for the target compound with an overall cross-reactivity of <0.3% to structurally related compounds. The assay sensitivity was negligibly affected by pH 4-9. A 5-fold improvement in IC50 was observed using a 10-fold concentrated phosphate-fuffered
拟除虫菊酯在农业中广泛用作杀虫剂。这项研究描述了一种灵敏的酶联免疫吸附测定法,用于检测3-苯氧基苄醇的葡糖醛酸苷共轭物,这是一种可能用作拟除虫菊酯生物标记的拟除虫菊酯代谢产物。针对两种不同的免疫半抗原引发了四种抗血清。抗血清结合几种包被半抗原进行了表征。用抗血清1891和3-苯氧基苯甲酸-BSA偶联物作为包被抗原可得到最低的IC50值(0.5 ng / mL)。抗血清1891对目标化合物具有高度选择性,与结构相关化合物的整体交叉反应性<0.3%。pH 4-9对测定灵敏度的影响可忽略不计。使用10倍浓缩磷酸盐处理的盐水作为测定缓冲液,观察到IC50改善了5倍。与在普通磷酸盐处理的盐水中进行的测定相比,最大吸光度几乎相同。观察到加标水平与免疫测定法检测到的水平之间具有良好的相关性(尿液样品A和B的r 2分别为0.99和0.97)。