Journal of Medicinal Chemistry p. 6985 - 6991 (2019)
Update date:2022-08-11
Topics:
Zhang, Haiyuan
Xie, Fang
Cheng, Muhua
Peng, Fangyu
Meta-iodobenzylguanidine (MIBG) is a ligand with high affinity against norepinephrine transporter (NET) that has been used for diagnostic imaging and radionuclide therapy of NET-expressing tumors, such as neuroblastoma. We hypothesize that MIBG can be used as a ligand for development of new anticancer drugs targeting NET-expressing neuroblastoma (NB). To test our hypothesis, we synthesized two MIBG-based anticancer copper complexes [Cu(m-TSBG)2 and Cu(p-TSBG)2] by conjugation of a thiosemicarbazone copper group onto MIBG ligand. Both Cu(m-TSBG)2 and Cu(p-TSBG)2 compounds showed potent anticancer activity against NB cells (BE2C and SK-N-DZ cells). The NB-specific anticancer activity of Cu(m-TSBG)2 and Cu(p-TSBG)2 was further demonstrated by the reduced anticancer activities when nonconjugated MIBG ligand was used to competitively block binding of Cu(m-TSBG)2 or Cu(p-TSBG)2 onto NET-expressing NB cells. Both Cu(m-TSBG)2 or Cu(p-TSBG)2 compounds hold potential as promising new drugs for targeted therapy of neuroblastoma and other NET-expressing tumors.
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