Amino Acid Derivatives with Anticonvulsant Activity.
作者:Ryszard PARUSZEWSKI、Marzanna STRUPINSKA、James P. STABLES、Mariusz ŚWIADER、Stanislaw CZUCZWAR、Zdzislaw KLEINROK、Waldemar TURSKI
DOI:10.1248/cpb.49.629
日期:——
A series of benzylamides of N-alkylated, N-acylated or free nine cyclic and one linear amino acids as potential anticonvulsants have been synthesized. The structures of the obtained compounds were designed on the basis of the previously determined structure and physicochemical properties/anticvonvulsant activity relationship of the formerly synthesized compounds of this type. The obtained compounds were evaluated in mice after intraperitoneal (ip) administration, by maximal electroshock seizure test (MES test), subcutaneous (sc) pentylenetetrazol test (sc PTZ test) and by the rotarod neurotoxicity test (Tox test). The results were the basis for their classification into one of three classes of the Anticonvulsant Screening Project (ASP) of the Antiepileptic Drug Development Program (ADDP) of the NIH. Three selected compounds were tested quantitatively in rats after oral administration. The MES ED50, sc PTZ ED50, Tox TD50 were determined and their protective index (PI) values were calculated. Anticonvulsant activity of the most promising compound (15) was examined in different seizure models. The respective ED50 and PI values of this compound were as follows: against bicuculline, 73 and 1.4; against PTZ, 47 and 2.2; against strychnine, 73 and 1.4; against pilocarpine 156, and 0.7; against kainic acid (2-carboxy-4-isopropenyl-3-pyrrolidineacetic acid), 39 and 2.6; against AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid), 10 and 10.3 and against NMDA (N-methyl-D-Aspartic acid), 114 and 0.9.
一系列N-烷基化、N-酰基化或自由的九环和一个直链氨基酸的苄胺衍生物作为潜在的抗癫痫药物已被合成。所得化合物的结构设计基于先前确定的结构和物理化学性质/抗癫痫活性关系,这是根据以前合成的这类化合物而设计的。通过腹腔注射(ip)给药后的小鼠,通过最大电惊厥发作测试(MES测试)、皮下(sc)戊四氮测试(sc PTZ测试)以及通过旋转棒神经毒性测试(Tox测试)对所得化合物进行评估。结果是根据它们在国家卫生研究院(NIH)的抗癫痫药物开发计划(ADDP)中的抗癫痫筛查项目(ASP)中的分类,分为三种类别之一。选取的三种化合物在口服给药后的大鼠中进行了定量测试。确定了MES ED50、sc PTZ ED50、Tox TD50并计算了它们的保护指数(PI)值。最有希望的化合物(15)在不同癫痫模型中的抗癫痫活性被检查。该化合物的相应ED50和PI值如下:对抗苯二氯酮,73和1.4;对抗戊四氮,47和2.2;对抗士的宁,73和1.4;对抗毛果芸香碱,156和0.7;对抗海人藻酸(2-羧基-4-异丙烯基-3-吡咯烷乙酸),39和2.6;对抗AMPA(α-氨基-3-羟基-5-甲基-4-异噁唑丙酸),10和10.3;对抗NMDA(N-甲基-D-天冬氨酸),114和0.9。