Protection against acetaminophen-induced hepatotoxicity by L-CySSME and its N-acetyl and ethyl ester derivatives
作者:Herbert T. Nagasawa、Don W. Shoeman、Jonathan F. Cohen、William B. Rathbun
DOI:10.1002/(sici)1522-7146(1996)11:6<289::aid-jbt4>3.0.co;2-g
日期:——
representative prodrugs of L-cysteine, namely, 2(RS)-methylthiazolidine-4(R)-carboxylic acid (MTCA), L-2-oxothiazolidine-4-carboxylic acid (OTCA), and N-acetyl-L-cysteine (NAC), in protecting the liver. It was shown that L-CySSME and MTCA administered intraperitoneally at 2.5 mmol/kg were superior to the other cysteine prodrugs at equimolar doses in protecting mice from hepatotoxicity elicited by a
我们最近观察到,S-(2-羟乙基巯基)-L-半胱氨酸(L-CySSME),即L-半胱氨酸和2-巯基乙醇的混合二硫键,通过对乙酰氨基酚(ACP)充当小鼠的前药来预防白内障半胱氨酸和保护肝脏。这促使人们评估了以亲脂药物形式存在的L-CySSME的亲脂性更强的N-乙酰基(Ac-CySSME)和乙酯(Et-CySSME)衍生物,以及作为肝保护剂的“ D”对映异构体。在有毒但无致命剂量的ACP保证动物48小时生存后的24小时测量血清ALT水平。由于产生的ALT的增加变化很大(即使在对数转换后也是如此),并且使统计分析变得复杂,因此我们计算了每个治疗组平均ALT水平的置信区间。这样就可以将L-CySSME以及Ac-CySSME和Et-CySSME与L-半胱氨酸的其他代表性前药即2(RS)-甲基噻唑烷-4(R)-羧酸(MTCA)的功效进行比较。 ),L-2-氧噻唑烷-4-羧酸(OTCA)和N-乙酰基-L