Discovery and evaluation of triple inhibitors of VEGFR-2, TIE-2 and EphB4 as anti-angiogenic and anti-cancer agents
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Lin Zhang1,*, Yuanyuan Shan2,*, Xingyue Ji3, Mengyuan Zhu3, Chuansheng Li1, Ying Sun1, Ru Si1, Xiaoyan Pan1, Jinfeng Wang1, Weina Ma1, Bingling Dai1, Binghe Wang3 and Jie Zhang1
1 School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, China
2 Department of Pharmacy, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
3 Department of Chemistry and Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia, United States
* These authors contributed equally to this work and should be regarded as joint first authors
Jie Zhang, email:
Binghe Wang, email:
Keywords: receptor tyrosine kinase, multiple inhibitors, anti-angiogenic agents, anti-cancer agents, quinazolin-4(3H)-one
Received: June 15, 2017 Accepted: July 30, 2017 Published: August 08, 2017
Receptor tyrosine kinases (RTKs), especially VEGFR-2, TIE-2, and EphB4, play a crucial role in both angiogenesis and tumorigenesis. Moreover, complexity and heterogeneity of angiogenesis make it difficult to treat such pathological traits with single-target agents. Herein, we developed two classes of multi-target RTK inhibitors (RTKIs) based on the highly conserved ATP-binding pocket of VEGFR-2/TIE-2/EphB4, using previously reported BPS-7 as a lead compound. These multi-target RTKIs exhibited considerable potential as novel anti-angiogenic and anticancer agents. Among them, QDAU5 displayed the most promising potency and selectivity. It significantly suppressed viability of EA.hy926 and proliferation of several cancer cells. Further investigations indicated that QDAU5 showed high affinity to VEGFR-2 and reduced the phosphorylation of VEGFR-2. We identified QDAU5 as a potent multiple RTKs inhibitor exhibiting prominent anti-angiogenic and anticancer potency both in vitro and in vivo. Moreover, quinazolin-4(3H)-one has been identified as an excellent hinge binding moiety for multi-target inhibitors of angiogenic VEGFR-2, Tie-2, and EphB4.
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