Synthesis of modified pyrimidine bases and positive impact of chemically reactive substituents on their in vitro antiproliferative activity
作者:Steffi Noll、Marijeta Kralj、Lidija Šuman、Holger Stephan、Ivo Piantanida
DOI:10.1016/j.ejmech.2008.06.002
日期:2009.3
The antiproliferative activity screening on human tumor cell lines of a series of modified uracil and cytosine bases as well as some corresponding acyclonucleosides, and comparison of structure–activity relationship revealed the importance of chemical reactivity of the substituent attached to the C5-position of uracil for the activity of studied compounds. Namely, the results obtained for the most
一系列修饰的尿嘧啶和胞嘧啶碱基以及一些相应的无环核苷在人肿瘤细胞系中的抗增殖活性筛选,以及结构-活性关系的比较表明,尿嘧啶C5位上取代基的化学反应活性对于研究化合物的活性。即,对于活性最高的化合物5-(氯乙酰氨基)尿嘧啶(2)及其无环糖类似物18所获得的结果表明,反应性取代基与胸苷酸合酶机制内若干可能的靶标之间形成了共价键(半胱氨酸残基,酶的基本部分,N,N-亚甲基四氢叶酸或其反应性亚胺形式)是最可能的作用方式。另外,新型的C 5-取代的尿嘧啶衍生物6(5- [双-(2-对-甲氧基苄基硫乙基)胺]乙酰氨基尿嘧啶)通过未知的机制对HeLa和MiaPaCa-2细胞系表现出高的抗增殖活性。