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Novel 2H-isoquinolin-3-ones as antiplasmodial falcipain-2 inhibitors
Nicola Micale1, Roberta Ettari, Tanja Schirmeister
1Dipartimento Farmaco-Chimico, Università di Messina, Viale Annunziata 98168, Messina, Italy. nmicale@pharma.unime.it
Abstract:
A series of 1-aryl-6,7-disubstituted-2H-isoquinolin-3-ones (2-10) was synthesized and evaluated for their inhibition against Plasmodium falciparum cysteine protease falcipain-2, as well as against cultured P. falciparum strain FCBR parasites. All compounds displayed inhibitory activity against recombinant falcipain-2 and against in vitro cultured intraerythrocytic P. falciparum, with the exception of 9. The new compounds exhibited no selectivity against human cysteine proteases such as cathepsins B and L. The inhibitory activity of the synthesized compounds was also evaluated against another protozoal cysteine protease, namely rhodesain of Trypanosoma brucei rhodesiense.
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