Synthesis, DNA Binding and Antitumor Evaluation of Styelsamine and Cystodytin Analogues
作者:Hugo Fong、Brent Copp
DOI:10.3390/md11020274
日期:——
A series of N-14 sidechain substituted analogues of styelsamine (pyrido[4,3,2-mn]acridine) and cystodytin (pyrido[4,3,2-mn]acridin-4-one) alkaloids have been prepared and evaluated for their DNA binding affinity and antiproliferative activity towards a panel of human tumor cell lines. Overall it was found that styelsamine analogues were stronger DNA binders, with the natural products styelsamines B and D having particularly high affinity (Kapp 5.33 × 106 and 3.64 × 106 M−1, respectively). In comparison, the cystodytin iminoquinone alkaloids showed lower affinity for DNA, but were typically just as active as styelsamine analogues at inhibiting proliferation of tumor cells in vitro. Sub-panel selectivity towards non-small cell lung, melanoma and renal cancer cell lines were observed for a number of the analogues. Correlation was observed between whole cell activity and clogP, with the most potent antiproliferative activity being observed for 3-phenylpropanamide analogues 37 and 41 (NCI panel average GI50 0.4 μM and 0.32 μM, respectively) with clogP ~4.0–4.5.
一系列N-14侧链取代的styelsamine(吡啶并[4,3,2-mn]吖啶)和cystodytin(吡啶并[4,3,2-mn]吖啶-4-酮)生物碱类似物已被制备并评估其结合DNA亲和力和对人类肿瘤细胞系的抗增殖活性。总体发现styelsamine类似物是更强的DNA结合剂,天然产物styelsamine B和D具有特别高的亲和力(Kapp分别为5.33 × 10^6 M^-1和3.64 × 10^6 M^-1)。相比之下,cystodytin亚胺醌生物碱对DNA的亲和力较低,但在抑制体外肿瘤细胞增殖方面通常与styelsamine类似物一样活跃。对于多个类似物,观察到对非小细胞肺癌、黑色素瘤和肾癌细胞系的亚组选择性。观察到整个细胞活性和clogP之间的相关性,最强烈的抗增殖活性在3-苯基丙酰胺类似物37和41中观察到(NCI面板平均GI50分别为0.4 μM和0.32 μM),clogP约为4.0-4.5。