Please use this identifier to cite or link to this item:
https://www.arca.fiocruz.br/handle/icict/64127
ACCESS TO ARTEMISININ−TRIAZOLE ANTIMALARIALS VIA ORGANO-CLICK REACTION: HIGH IN VITRO/IN VIVO ACTIVITY AGAINST MULTI-DRUG-RESISTANT MALARIA PARASITES
Híbridos de artemisinina-triazol
Reação de organo-clique
Estudos in vitro/in vivo
Artemisinin−triazole hybrids
Organo-click reaction
In vitro/in vivo studies
Author
Affilliation
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Institute of Medical Biotechnology. Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil.
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Institute of Medical Biotechnology. Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil.
Institute of Medical Biotechnology. Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Institute of Medical Biotechnology. Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil.
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Institute of Medical Biotechnology. Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil.
Institute of Medical Biotechnology. Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Department of Chemistry and Pharmacy. Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM). Friedrich-Alexander-University Erlangen-Nürnberg. Erlangen, Germany.
Abstract
Malaria is one of the most widespread diseases worldwide. Besides a growing number of people potentially threatened by malaria, the consistent emergence of resistance against established antimalarial pharmaceuticals leads to an urge toward new antimalarial drugs. Hybridization of two chemically diverse compounds into a new bioactive product is a successful concept to improve the properties of a hybrid drug relative to the parent compounds and also to overcome multidrug resistance. 1,2,3-Triazoles are a significant pharmacophore system among nitrogen-containing heterocycles with various applications, such as antiviral, antimalarial, antibacterial, and anticancer agents. Several marketed drugs possess these versatile moieties, which are used in a wide range of medical indications. While the synthesis of hybrid compounds containing a 1,2,3-triazole unit was described using Cu- and Ru-catalyzed azide–alkyne cycloaddition, an alternative metal-free pathway has never been reported for the synthesis of antimalarial hybrids. However, a metal-free pathway is a green method that allows toxic and expensive metals to be replaced with an organocatalyst. Herein, we present the synthesis of new artemisinin–triazole antimalarial hybrids via a facile Ramachary-Bressy-Wang organocatalyzed azide-carbonyl [3 + 2] cycloaddition (organo-click) reaction. The prepared new hybrid compounds are highly potent in vitro against chloroquine (CQ)-resistant and multi-drug-resistant Plasmodium falciparum strains (IC50 (Dd2) down to 2.1 nM; IC50 (K1) down to 1.8 nM) compared to CQ (IC50 (Dd2) = 165.3 nM; IC50 (K1) = 302.8 nM). Moreover, the most potent hybrid drug was more efficacious in suppressing parasitemia and extending animal survival in Plasmodium berghei-infected mice (up to 100% animal survival and up to 40 days of survival time) than the reference drug artemisinin, illustrating the potential of the hybridization concept as an alternative and powerful drug-discovery approach.
Keywords in Portuguese
Malária multirresistenteHíbridos de artemisinina-triazol
Reação de organo-clique
Estudos in vitro/in vivo
Keywords
Multi-drug-resistant malariaArtemisinin−triazole hybrids
Organo-click reaction
In vitro/in vivo studies
Share