Tumor Targeting with Novel 6-Substituted Pyrrolo [2,3-<i>d</i>] Pyrimidine Antifolates with Heteroatom Bridge Substitutions via Cellular Uptake by Folate Receptor α and the Proton-Coupled Folate Transporter and Inhibition of de Novo Purine Nucleotide Biosynthesis
作者:Lalit K. Golani、Adrianne Wallace-Povirk、Siobhan M. Deis、Jennifer Wong、Jiyuan Ke、Xin Gu、Sudhir Raghavan、Mike R. Wilson、Xinxin Li、Lisa Polin、Parker W. de Waal、Kathryn White、Juiwanna Kushner、Carrie O’Connor、Zhanjun Hou、H. Eric Xu、Karsten Melcher、Charles E. Dann、Larry H. Matherly、Aleem Gangjee
DOI:10.1021/acs.jmedchem.6b00594
日期:2016.9.8
Targeted antifolates with heteroatom replacements of the carbon vicinal to the phenyl ring in 1 by N (4), O (8), or S (9), or with N-substituted formyl (5), acetyl (6), or trifluoroacetyl (7) moieties, were synthesized and tested for selective cellular uptake by folate receptor (FR) α and β or the proton-coupled folate transporter. Results show increased in vitro antiproliferative activity toward engineered
靶向抗叶酸药物,其中杂原子取代邻位碳的杂原子在1中被N(4),O(8)或S(9)取代,或被N-取代的甲酰基(5),乙酰基(6)或三氟乙酰基(合成7)部分,并测试叶酸受体(FR)α和β或质子偶联的叶酸转运蛋白对细胞的选择性摄取。结果显示,与CH 2类似物1相比,对表达FRs的工程化中国仓鼠卵巢细胞的体外抗增殖活性提高了4 – 9。化合物4 – 9抑制了从头嘌呤的生物合成和甘氨酰胺核糖核苷酸甲酰转移酶(GARFTase)。具有FRα和GARFTase的4的X射线晶体结构表明,4的结合构象需要具有柔韧性才能同时附着于FRα和GARFTase。在携带IGROV1卵巢肿瘤异种移植物的小鼠中,4种是高度有效的。我们的研究结果表明,与1相关的6-取代的吡咯并[2,3- d ]嘧啶的3原子桥区域中的杂原子取代可提供目标抗叶酸,因此有必要进一步评估其作为抗癌剂的作用。