Efficient new constructs against triple negative breast cancer cells: synthesis and preliminary biological study of ferrocifen–SAHA hybrids and related species
作者:José de Jesús Cázares Marinero、Marion Lapierre、Vincent Cavaillès、Rénette Saint-Fort、Anne Vessières、Siden Top、Gérard Jaouen
DOI:10.1039/c3dt51917a
日期:——
Chemotherapeutic agents combining several active groups within a single molecule can modulate multiple cellular pathways and, thus, exhibit higher efficacy than single-target drugs. In this study, six new hybrid compounds combining tamoxifen (TAM) or ferrocifen (FcTAM) structural motifs with suberoylanilide hydroxamic acid (SAHA) were synthesised and evaluated. Antiproliferative activity was first explored in cancer cell lines. Combining FcTAM and SAHA structural motifs to form the unprecedented FcTAMâSAHA hybrid molecule led to an increased cytotoxicity (IC50 = 0.7 μM) in triple-negative MDA-MB-231 breast cancer cells when compared to FcTAM or SAHA alone (IC50 = 2.6 μM and 3.6 μM, respectively), while the organic hybrid analogue TAMâSAHA was far less cytotoxic (IC50 = 8.6 μM). In hormone-dependent MCF-7 breast cancer cells, FcTAMâSAHA was more active (IC50 = 2.0 μM) than FcTAM (IC50 = 4.4 μM) and TAMâSAHA (IC50 > 10 μM), but less toxic than SAHA (IC50 = 1.0 μM). Surprisingly, FcTAMâPSA, an N1-phenylsuberamide derivative, also possessed strong antiproliferative activity (IC50 = 0.5 μM and 1.8 μM in MDA-MB-231 and MCF-7 cells, respectively). Subsequent biochemical studies indicate that estrogen receptor alpha (ERα) and histone deacetylases (HDAC) are not the main targets of the hybrid compounds for their antiproliferative effect. Interestingly, both organometallic compounds were able to induce p21waf1/cip1 gene expression in MCF-7 breast cancer cells in accordance with their antiproliferative activity.
将多个活性基团结合于单一分子中的化疗药物能够调控多条细胞信号通路,因此其疗效高于单一靶点药物。在本研究中,我们合成并评估了6种新型混合化合物,它们结合了他莫昔芬(TAM)或铁西他莫(FcTAM)结构基团与辛二酰苯胺异羟肟酸(SAHA)。首先在癌细胞系中探索它们的抗增殖活性。将FcTAM与SAHA结构基团结合起来形成前所未有的FcTAM-SAHA混合分子,与单独的FcTAM或SAHA相比(分别为IC50 = 2.6 μM和3.6 μM),在三阴性乳腺癌细胞MDA-MB-231中显示出增加的细胞毒性(IC50 = 0.7 μM),而有机混合类似物TAM-SAHA的细胞毒性则低得多(IC50 = 8.6 μM)。在激素依赖性乳腺癌细胞MCF-7中,FcTAM-SAHA的活性比FcTAM(IC50 = 4.4 μM)和TAM-SAHA(IC50 > 10 μM)更高(IC50 = 2.0 μM),但毒性比SAHA(IC50 = 1.0 μM)低。令人惊讶的是,N1-苯基辛二酰胺衍生物FcTAM-PSA也显示出强大的抗增殖活性(在MDA-MB-231和MCF-7细胞中分别为IC50 = 0.5 μM和1.8 μM)。后续的生化研究表明,雌激素受体α(ERα)和组蛋白去乙酰化酶(HDAC)并不是这些混合化合物抗增殖作用的主要靶点。有趣的是,这两种有机金属化合物都能根据其抗增殖活性诱导MCF-7乳腺癌细胞中的p21waf1/cip1基因表达。