Abstract:
:Two new series of symmetric acyclic nucleoside bisphosphonates (ANbPs) have been synthesised as potential inhibitors of the Plasmodium falciparum (Pf) and vivax (Pv) 6-oxopurine phosphoribosyltransferases. The structural variability between these symmetric ANbPs lies in the number of atoms in the two acyclic linkers connecting the N9 atom of the purine base to each of two phosphonate groups and the branching point of the acyclic moiety relative to the purine base, which occurs at either the alpha or beta positions. Within each series, six different 6-oxopurine bases have been attached. In general, the ANbPs with either guanine or hypoxanthine have lower Ki values than for those containing either the 8-bromo or 7-deaza 6-oxopurine bases. The lowest Ki values obtained for the two parasite enzymes were 0.1μM (Pf) and 0.2μM (Pv) for this series of compounds. Two phosphoramidate prodrugs of these inhibitors exhibited antimalarial activity against Pf in infected erythrocyte cell culture with IC50 values of 0.8 and 1.5μM. These two compounds exhibited low cytotoxicity in human A549 cells having CC50 values of >300μM resulting in an excellent selectivity index.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Špaček P,Keough DT,Chavchich M,Dračínský M,Janeba Z,Naesens L,Edstein MD,Guddat LW,Hocková Ddoi
10.1016/j.bmc.2017.05.048subject
Has Abstractpub_date
2017-08-01 00:00:00pages
4008-4030issue
15eissn
0968-0896issn
1464-3391pii
S0968-0896(17)30721-6journal_volume
25pub_type
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