新型2-呋喃苯并咪唑类VEGFR-2抑制剂的设计、合成、分子对接及细胞毒性评价

Design, synthesis, molecular docking and cytotoxic evaluation of novel 2-furybenzimidazoles as VEGFR-2 inhibitors.

作者信息

Abdullaziz Mona A, Abdel-Mohsen Heba T, El Kerdawy Ahmed M, Ragab Fatma A F, Ali Mamdouh M, Abu-Bakr Sherifa M, Girgis Adel S, El Diwani Hoda I

机构信息

Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical and Drug Industries, National Research Centre, Dokki, Cairo, Egypt.

Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical and Drug Industries, National Research Centre, Dokki, Cairo, Egypt.

出版信息

Eur J Med Chem. 2017 Aug 18;136:315-329. doi: 10.1016/j.ejmech.2017.04.068. Epub 2017 Apr 26.

Abstract

Inhibition of angiogenesis through inhibition of vascular endothelial growth factor receptor 2 (VEGFR-2) has been applied in cancer therapy because of its important role in promoting cancer growth and metastasis. In the presented study, a series of benzimidazol-furan hybrids was designed and synthesized through facile synthetic pathways. Evaluation of the synthesized compounds for their in vitro cytotoxic activity against breast (MCF-7) and hepatocellular (HepG2) carcinoma cell lines was performed. Two of the synthesized conjugates, 10b and 15, showed potent antiproliferative properties against MCF-7 cell line (IC = 21.25, 21.35 μM, respectively) in comparison to tamoxifen (IC = 21.57 μM). Additionally, compounds 10a, 10b, 15 and 17 showed promising potency (IC = 25.95, 22.58, 26.94 and 31.06 μM, respectively) against liver carcinoma cell line HepG2 in contrast to cisplatin (IC = 31.16 μM). Moreover, in vitro evaluation of the synthesized compounds for their effect on the level of VEGFR-2 in MCF-7 cell line showed their potent inhibitory activity relative to control untreated cells. Four compounds 10a, 10b, 14 and 15 showed 92-96% reduction in VEGFR-2 level, compared with tamoxifen and sorafenib which showed inhibition percentage of 98% and 95.75%, respectively. Compound 10a was found to have promising VEGFR-2 inhibitory activity (IC = 0.64 μM) in comparison to sorafenib (IC = 0.1 μM). Molecular docking was performed to study the binding pattern of the newly synthesized compounds with VEGFR-2 active site. Molecular docking attributed their good VEGFR-2 inhibitory activity to their hydrogen bonding interaction with the key amino acids in VEGFR-2 active site, Glu885 and Asp1046, and their hydrophobic interaction by their 2-furylbenzimidazole moiety with the allosteric hydrophobic back pocket in a type III inhibitors-like binding mode. The binding interaction is augmented by a ring substituent with long chain extension at position 1 of the benzimidazole due to its hydrophobic interaction with the hydrophobic side chains of the amino acids at the interface between the ATP binding site and the allosteric back pocket. Structure-activity relationship (SAR) was inferred for future optimization based on the performed biological and docking studies.

摘要

通过抑制血管内皮生长因子受体2(VEGFR - 2)来抑制血管生成,因其在促进癌症生长和转移中起重要作用,已被应用于癌症治疗。在本研究中,通过简便的合成途径设计并合成了一系列苯并咪唑 - 呋喃杂化物。对合成的化合物针对乳腺癌(MCF - 7)和肝癌(HepG2)细胞系进行了体外细胞毒性活性评估。与他莫昔芬(IC = 21.57 μM)相比,合成的两种缀合物10b和15对MCF - 7细胞系显示出强效的抗增殖特性(IC分别为21.25、21.35 μM)。此外,与顺铂(IC = 31.16 μM)相比,化合物10a、10b、15和17对肝癌细胞系HepG2显示出有前景的活性(IC分别为25.95、22.58、26.94和31.06 μM)。而且,对合成的化合物针对MCF - 7细胞系中VEGFR - 2水平的影响进行体外评估,结果显示它们相对于未处理的对照细胞具有强效的抑制活性。与他莫昔芬和索拉非尼(抑制率分别为98%和95.75%)相比,四种化合物10a、10b、14和15使VEGFR - 2水平降低了92 - 96%。与索拉非尼(IC = 0.1 μM)相比,发现化合物10a具有有前景的VEGFR - 2抑制活性(IC = 0.64 μM)。进行了分子对接研究新合成化合物与VEGFR - 2活性位点的结合模式。分子对接将它们良好的VEGFR - 2抑制活性归因于它们与VEGFR - 2活性位点中的关键氨基酸Glu885和Asp1046的氢键相互作用,以及它们的2 - 呋喃基苯并咪唑部分以III型抑制剂样结合模式与变构疏水后口袋的疏水相互作用。由于苯并咪唑1位带有长链延伸的环取代基与ATP结合位点和变构后口袋之间界面处氨基酸的疏水侧链的疏水相互作用,增强了结合相互作用。基于所进行的生物学和对接研究推断了构效关系(SAR),以便未来进行优化。

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