Promoting the formation and stabilization of human telomeric G-quadruplex DNA, inhibition of telomerase and cytotoxicity by phenanthroline derivatives
作者:Lihua Wang、Ye Wen、Jie Liu、Jun Zhou、Can Li、Chunying Wei
DOI:10.1039/c0ob00961j
日期:——
Four new di-substituted phenanthroline-based compounds a–d have been designed and prepared, and they have been shown to induce the formation of anti-parallel structure of human telomeric G-quadruplex DNA by CD spectra. FRET assay indicates that the melting temperature increases (ΔTm values) of G-quadruplex in buffer (pH 7.4) containing 100 mM NaCl are 31.6, 34.6, 17.8 and 32.6 °C for the compounds (1.0 μM) a, b, c and d, respectively. Competitive FRET assay shows that the four compounds exhibit a high G-quadruplex DNA selectivity over duplex DNA. Three of the compounds are the potent telomerase inhibitors and HeLa cell proliferation inhibitors.
设计和制备了四种新的二取代菲罗啉基化合物 a-d,并通过 CD 光谱证明它们能诱导人类端粒 G-四链式 DNA 形成反平行结构。FRET 分析表明,化合物(1.0 μM)a、b、c 和 d 在含有 100 mM NaCl 的缓冲液(pH 值为 7.4)中的 G-四链节熔化温度升高(ΔTm 值)分别为 31.6、34.6、17.8 和 32.6 ℃。竞争性 FRET 分析表明,与双链 DNA 相比,这四种化合物表现出较高的 G-四链 DNA 选择性。其中三个化合物是强效端粒酶抑制剂和 HeLa 细胞增殖抑制剂。