Synthesis of fluorescent derivatives of praziquantel: cell-imaging and interaction with Schistosoma japonicum cercariae
作者:Yunzhi Xie、Yibao Li、Yongquan Wu、Chunhua Liu、Xiaokang Li、Xun Li、Xiaolin Fan
DOI:10.1039/c3ob41348a
日期:——
Schistosomiasis is one of the most burdensome of the neglected tropical diseases. Praziquantel is a recommended drug for treatment against all forms of schistosomiasis. To investigate the interaction between praziquantel and Schistosoma japonicum cercariae, two praziquantel derivatives (PZQ-2 and PZQ-3) and one praziquantel fluorescent derivative (PZQ-5) have been synthesized and characterized using nuclear magnetic resonance spectroscopy (NMR) and MS spectra. The cytotoxicity of PZQ-2, PZQ-3 and PZQ-5 was measured by performing the methyl thiazolyl tetrazolium (MTT) assay. The cell viability for them shows that the three compounds exhibit low cytotoxicity to HeLa cells. Cell imaging experiments demonstrate that PZQ-5 is biocompatible and cell-permeable, which indicates that PZQ-5 is suitable for studying their interaction. Confocal fluorescence microscopy revealed that PZQ-5 is mainly located at the cercarial tegument, which leads to the death of cercariae with the increase in time.
Praziquantel derivatives I: Modification of the aromatic ring
作者:Fiona Ronketti、A. Venkata Ramana、Xia Chao-Ming、Livia Pica-Mattoccia、Donato Cioli、Matthew H. Todd
DOI:10.1016/j.bmcl.2007.05.063
日期:2007.8
Several analogues of the potent anthelmintic praziquantel were prepared with variation in the aromaticring. The biological activity of these analogues was evaluated and compared against known analogues. Amination of the ring was tolerated while other variations were not. These results have important implications for drug development for schistosomiasis.