In order to obtain specific antisera for use in immunoassays of 11-deoxycortisol, new hapten-carrier conjugates were prepared from 4-hemisuccinoyloxy-11-deoxycortisol, 4-(carboxymethylthio)-11-deoxycortisol, 4-(2-carboxyethylthio)-11-deoxycortisol and 4-(2-hemisuccinoyloxyethylthio)-11-deoxycortisol by coupling with bovine serum albumin employing the N-succinimidyl ester method. The specificity of anti-11-deoxycortisol antisera elicited in rabbits by immunization with these antigens was tested by crossreaction studies with closely related steroids and by measuring the amount of 11-deoxycortisol in plasma specimens by means of radioimmunoassay. The results showed that the antisera obtained were reasonably specific and useful for the determination of plasma 11-deoxycortisol levels in metyrapone tests. The assay can be done on methylene chloride extracts of plasma.
为了获得用于 11-
脱氧皮质醇免疫测定的特异性抗血清,我们用 4-半琥珀酰氧基-11-
脱氧皮质醇、4-(羧基甲
硫基)-11-
脱氧皮质醇、4-(2-羧基乙
硫基)-11-
脱氧皮质醇和 4-(2-半琥珀酰氧基乙
硫基)-11-
脱氧皮质醇制备了新的单体-载体共轭物、4-(2-羧基乙
硫基)-11-
脱氧皮质醇和 4-(2-半琥珀酰氧基乙
硫基)-11-
脱氧皮质醇采用 N-琥珀
酰亚胺酯法与
牛血清白蛋白偶联。通过与密切相关的类
固醇进行交叉反应研究,以及通过放射免疫测定法测量血浆标本中 11-
脱氧皮质醇的含量,检验了用这些抗原免疫兔子所激发的抗 11-
脱氧皮质醇抗血清的特异性。结果表明,获得的抗血清具有相当高的特异性,可用于在甲氧
孕酮试验中测定血浆中 11-
脱氧皮质醇的
水平。该测定可在血浆的
二氯甲烷提取物中进行。