Potential of 2-Hydroxy-3-Phenylsulfanylmethyl-[1,4]-Naphthoquinones against Leishmania (L.) infantum: Biological Activity and Structure-Activity Relationships

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art_PINTO_Potential_of_2Hydroxy3Phenylsulfanylmethyl14Naphthoquinones_against_Leishmania_L_infantum_Biological_2014.PDF (386.06 KB)
Citações na Scopus
40
Tipo de produção
article
Data de publicação
2014
Editora
PUBLIC LIBRARY SCIENCE
DOI
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Scopus
Web of Science
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Autores
SANTOS, Isabela O.
SCHMIDT, Thomas J.
BORBOREMA, Samanta E. T.
FERREIRA, Vitor F.
ROCHA, David R.
TEMPONE, Andre G.
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Citação
PLOS ONE, v.9, n.8, article ID e105127, 7p, 2014
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Naphtoquinones have been used as promising scaffolds for drug design studies against protozoan parasites. Considering the highly toxic and limited therapeutic arsenal, the global negligence with tropical diseases and the elevated prevalence of co-morbidities especially in developing countries, the parasitic diseases caused by various Leishmania species (leishmaniasis) became a significant public health threat in 98 countries. The aim of this work was the evaluation of antileishmanial in vitro potential of thirty-six 2-hydroxy-3-phenylsulfanylmethyl-[1,4]-naphthoquinones obtained by a three component reaction of lawsone, the appropriate aldehyde and thiols adequately substituted, exploiting the in situ generation of o-quinonemethides (o-QM) via the Knoevenagel condensation. The antileishmanial activity of the naphthoquinone derivatives was evaluated against promastigotes and intracellular amastigotes of Leishmania (Leishmania) infantum and their cytotoxicity was verified in mammalian cells. Among the thirty-six compounds, twenty-seven were effective against promastigotes, with IC50 values ranging from 8 to 189 mu M; fourteen compounds eliminated the intracellular amastigotes, with IC50 values ranging from 12 to 65 mu M. The compounds containing the phenyl groups at R-1 and R-2 and with the fluorine substituent at the phenyl ring at R-2, rendered the most promising activity, demonstrating a selectivity index higher than 15 against amastigotes. A QSAR (quantitative structure activity relationship) analysis yielded insights into general structural requirements for activity of most compounds in the series. Considering the in vitro antileishmanial potential of 2-hydroxy-3-phenylsulfanylmethyl-[1,4]-naphthoquinones and their structure-activity relationships, novel lead candidates could be exploited in future drug design studies for leishmaniasis.
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https://observatorio.fm.usp.br/handle/OPI/8849
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Coleções
Artigos e Materiais de Revistas Científicas - IMT