作者:Rajeev Gokhale、A. Michael Crider、Rajiv Gupte、J.D. Wood
DOI:10.1002/jps.2600790115
日期:1990.1
The synthesis and anticonvulsant activity of nipecotic acid esters (1a-1f) have been previously reported. It was thought that these prodrug esters underwent hydrolytic conversion to 1 which inhibited GABA uptake, and that both 1 and an intact ester may have caused inhibition of GABA uptake which resulted in the anticonvulsant activity. There is, however, no stability data available to help evaluate
先前已经报道了乳酸酯(1a-1f)的合成和抗惊厥活性。认为这些前药酯经过水解转化为1,从而抑制了GABA的吸收,并且认为1和完整的酯都可能引起对GABA的吸收的抑制,从而导致了抗惊厥活性。但是,没有可用的稳定性数据来帮助评估这些影响。通过监测酚类化合物的外观,我们确定了这些苯酯在10%血清溶液或pH 7.4缓冲液(离子强度= 0.25用KCl调节)中的降解半衰期(t 1/2)在37摄氏度下的变化。用HPLC方法进行12小时。使用公开的方法,测量了体外[14C] GABA的吸收。结果表明,在10%血清溶液中的水解速率比在缓冲溶液中的水解速率快,并且半衰期在0.20至3.84 h之间变化。在0.02 mM浓度下,吸收抑制在8.2%和41.7%之间变化,并且GABA吸收抑制百分比与log t 1/2相关(r = -0.9827,p = 0.00045,基于测试)。我们的数据表明,在0.02至1