Generation of Polyclonal Catalytic Antibodies Against Cocaine Using Transition State Analogs of Cocaine Conjugated to Diphtheria Toxoid.
作者:Garo P. BASMADJIAN、Satendra SINGH、Budiono SASTRODJOJO、Blaine T. SMITH、Kwasi AVOR、Fengchun CHANG、Stanley L. MILLS、Thomas W. SEALE
DOI:10.1248/cpb.43.1902
日期:——
Six novel transition state analogs (TSAs) of cocaine (10-14 and 17) and one non-cocaine, p-aminophenyl-phosphonyl ester of cyclohexanol (19), were synthesized and characterized by 1H- and 13C-NMR and FAB-MS.(1R)-ecgonine methyl ester or cyclohexanol were subjected to phenylphosphonylation in the presence of dicyclohexyl carbodiimde (DCC) and 4-N, N-dimethyl aminopyridine (4-DMAP). TSA-IV (10), however, was synthesized from norcocaine which was protected with dibromoethane to yield 4 before acid hydrolysis, esterification and phenyl-phosphonylation were carried out. TSA-III (11) TSA-I (12) and (19), using various length spacer arms, were coupled with the immunogenic protein, diphtheria toxoid (DT). The TSAs coupled with DT were used to immunize mice and after appropriate boosts their sera were tested for the presence and titer of anti-TSA polyclonal antibodies using ELISA. Preliminary results show that the mice immunized with these TSAs produced high titers of polyclonal catalytic antibodies, except for (19), with the ability to hydrolyze the substrate 125I-4'-iodococaine in an in vitro assay, even in the presence of noncatalytic anti-TSA antibodies.
合成了六种新型可卡因过渡态类似物 (TSA) (10-14 和 17) 和一种非可卡因环己醇对氨基苯基膦酰酯 (19),并通过 1H 和 13C-NMR 和 FAB-MS 进行表征(1R)-芽子碱甲酯或环己醇在二环己基碳二亚胺(DCC)和4-N,N-二甲基氨基吡啶(4-DMAP)存在下进行苯基膦酰化。然而,TSA-IV (10) 是由去甲可卡因合成的,在进行酸水解、酯化和苯基膦酰化之前,将去甲可卡因用二溴乙烷保护以产生4。 TSA-III (11) TSA-I (12) 和 (19) 使用不同长度的间隔臂与免疫原性蛋白白喉类毒素 (DT) 偶联。 TSA 与 DT 结合用于免疫小鼠,并在适当加强后,使用 ELISA 测试其血清中抗 TSA 多克隆抗体的存在和滴度。初步结果表明,用这些 TSA 免疫的小鼠产生了高滴度的多克隆催化抗体((19)除外),在体外测定中具有水解底物 125I-4'-碘可卡因的能力,即使在存在非催化抗体的情况下也是如此。 -TSA 抗体。