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31.
Nicolli Bellotti de Souza Anna Caroline Campos Aguiar Alane Cabral de Oliveira Siden Top Pascal Pigeon Gérard Jaouen Marilia Oliveira Fonseca Goulart Antoniana Ursine Krettli 《Memórias do Instituto Oswaldo Cruz》2015,110(8):981-988
This work reports the in vitro activity against Plasmodiumfalciparumblood forms (W2 clone, chloroquine-resistant) oftamoxifen-based compounds and their ferrocenyl (ferrocifens) and ruthenocenyl(ruthenocifens) derivatives, as well as their cytotoxicity against HepG2 humanhepatoma cells. Surprisingly with these series, results indicate that the biologicalactivity of ruthenocifens is better than that of ferrocifens and other tamoxifen-likecompounds. The synthesis of a new metal-based compound is also described. It wasshown, for the first time, that ruthenocifens are good antiplasmodial prototypes.Further studies will be conducted aiming at a better understanding of their mechanismof action and at obtaining new compounds with better therapeutic profile. 相似文献
32.
Julia Penna Coutinho Anna Caroline Campos Aguiar Pierre Alexandre dos Santos Joaquim Corsino Lima Maria Gabrielle Lima Rocha Carlos Leomar Zani Tania Maria Almeida Alves Ant?nio Euzébio Goulart Santana Maria de Meneses Pereira Antoniana Ursine Krettli 《Memórias do Instituto Oswaldo Cruz》2013,108(8):974-982
Infusions of Aspidosperma nitidum (Apocynaceae) wood bark are used
to treat fever and malaria in the Amazon Region. Several species of this family are
known to possess indole alkaloids and other classes of secondary metabolites, whereas
terpenoids, an inositol and the indole alkaloids harmane-3 acid and braznitidumine
have been described in A. nitidum . In the present study, extracts
from the wood bark, leaves and branches of this species were prepared for assays
against malaria parasites and cytotoxicity testing using human hepatoma and normal
monkey kidney cells. The wood bark extracts were active against Plasmodium
falciparum and showed a low cytotoxicity in vitro, whereas the leaf and
branch extracts and the pure alkaloid braznitidumine were inactive. A crude methanol
extract was subjected to acid-base fractionation aimed at obtaining alkaloid-rich
fractions, which were active at low concentrations against P.
falciparum and in mice infected with and sensitive Plasmodium
berghei parasites. Our data validate the antimalarial usefulness of
A. nitidum wood bark, a remedy that can most likely help to
control malaria. However, the molecules responsible for this antimalarial activity
have not yet been identified. Considering their high selectivity index, the
alkaloid-rich fractions from the plant bark might be useful in the development of new
antimalarials. 相似文献