Mechanism-Based Competitive Inhibitors of Glyoxalase I: Intracellular Delivery, in Vitro Antitumor Activities, and Stabilities in Human Serum and Mouse Serum
作者:Malcolm J. Kavarana、Elena G. Kovaleva、Donald J. Creighton、Megan B. Wollman、Julie L. Eiseman
DOI:10.1021/jm9708036
日期:1999.1.1
S-(N-Aryl-N-hydroxycarbamoyl)glutathione derivatives (GSC(O)N(OH)C6H4X, where GS = glutathionyl and X = H (1), Cl (2), Br (3)) have been proposed as possible anticancer agents, because of their ability to strongly inhibit the methylglyoxal-detoxifying enzyme glyoxalase I. In order to test this hypothesis, the in vitro antitumor activities of these compounds and their [glycyl,glutamyl] diethyl ester
已提出S-(N-芳基-N-羟基氨基甲酰基)谷胱甘肽衍生物(GSC(O)N(OH)C6H4X,其中GS =谷胱甘肽和X = H(1),Cl(2),Br(3))可能的抗癌药,因为它们具有强烈抑制甲基乙二醛解毒酶乙二醛酶I的能力。为了验证这一假设,这些化合物及其[甘氨酰,谷氨酰基]二乙酯的前药形式具有体外抗肿瘤活性(1(Et) 2-3(Et)2)已被检查。所有三种二乙基酯均在培养物中抑制L1210鼠白血病和B16黑色素性黑色素瘤的生长,其GI50值在微摩尔浓度范围内。对L1210细胞的细胞通透性研究表明,生长抑制与二乙酯迅速扩散到细胞中有关,随后乙酯官能团的酶促水解产生抑制性二酸。相反,相应的二酸既不容易扩散也不明显抑制这些细胞的生长。与细胞生长抑制归因于乙二醛酶I的竞争性抑制的假设一致,将L1210细胞与2(Et)2一起预孵育会增加这些细胞对外源甲基乙二醛抑制作用的敏感性。化合物2(Et)2对