Structure-activity relationship of hybrids of Cinchona alkaloids and bile acids with in vitro antiplasmodial and antitrypanosomal activities.
Eur J Med Chem
; 100: 10-7, 2015 Jul 15.
Article
em En
| MEDLINE
| ID: mdl-26063305
ABSTRACT
In this work, a series of hybrid compounds were tested as antiparasitic substances. These hybrids were prepared from bile acids and a series of antiparasitic Cinchona alkaloids by the formation of a covalent C-C bond via a decarboxylative Barton-Zard reaction between the two entities. The bile acids showed only weak antiparasitic properties, but all the hybrids exhibited high in vitro activities (IC50 0.48-5.39 µM) against Trypanosoma brucei. These hybrids were more active than their respective parent alkaloids (up to a 135 fold increase in activity), and displayed good selectivity indices. Aditionally, all these compounds inhibited the in vitro growth of a chloroquine-sensitive strain of Plasmodium falciparum (3D7 IC50 36.1 nM to 8.72 µM), and the most active hybrids had IC50s comparable to that of artemisinin (IC50 36 nM). Some structure-activity relationships among the group of 48 hybrids are discussed. The increase in antiparasitic activity may be explained by an improvement in bioavailability, since the more lipophilic derivatives showed the lowest IC50s.
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Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
3_ND
Base de dados:
MEDLINE
Assunto principal:
Plasmodium falciparum
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Tripanossomicidas
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Trypanosoma brucei brucei
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Ácidos e Sais Biliares
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Alcaloides de Cinchona
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Antimaláricos
Idioma:
En
Revista:
Eur J Med Chem
Ano de publicação:
2015
Tipo de documento:
Article