In vitro cytotoxicity of GC sequence directed alkylating agents related to distamycin
作者:Moses Lee、Andrea L. Rhodes、Michael D. Wyatt、Maurizio D'Incalci、Stephen Forrow、John A. Hartley
DOI:10.1021/jm00059a011
日期:1993.4
C-terminus contain a dimethylamino moiety have been shown to selectively bind to the minor groove of GC-rich sequences. Accordingly, these agents were employed as vectors for the delivery of a variety of alkylating agents to GC-rich sequences. The alkylating agents are attached to the N-terminus of these vectors thus providing the benzoyl N-mustards (8, 15, and 18 that contain one, two, and three imidazole
已显示含咪唑类似物7、10和17的他新霉素,其中C端含有二甲基氨基部分,该咪唑选择性结合富GC序列的短沟。因此,这些试剂被用作载体以将多种烷基化试剂递送至富含GC的序列。烷基化剂连接到这些载体的N-末端,从而提供苯甲酰基N-芥末(分别包含1、2和3个咪唑单元的8、15和18)和取代的乙酰胺11-14。乙酰胺7、10和17以及芥子15和18的乙锭置换试验结果表明,这些试剂与小牛胸腺DNA,poly(dA.dT),poly(dG.dC)以及大肠杆菌T4 DNA结合,从而确认它们在小凹槽中的结合。这些化合物与聚(dA)的结合常数降低。dT)虽然仍比二棉霉素与poly(dG.dC)结合得更牢固或更牢固,但为他们接受GC序列提供了证据。CD滴定研究也表明了对富含GC的序列的选择性。将10、15、17和18滴定至poly(dA.dT)会在约330 nm处产生弱的药物诱导CD谱带;然而,这些药物与等摩尔药物浓度下的聚(dG