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Gonçalves-Oliveira, Luiz Filipe; Souza-Silva, Franklin; de Castro Côrtes, Luzia Monteiro; Veloso, Laura Barral; Santini Pereira, Bernardo Acácio; Cysne-Finkelstein, Lea; Lechuga, Guilherme Curty; Bourguignon, Saulo Cabral; Almeida-Souza, Fernando; da Silva Calabrese, Kátia; Ferreira, Vitor Francisco; Alves, Carlos Roberto
International journal for parasitology -- drugs and drug resistance, 08/2019, Letnik: 10Journal Article
Current treatment of cutaneous leishmaniasis includes pentavalent antimonials as first-line drugs, but this therapy has shown severe adverse effects. An alternative to minimize this issue is based on combination therapy scheme with other drugs. In this study we analyzed the potential of the association of meglumine antimoniate (MA) with the oxiranes epoxy-α-lapachone (LAP) or epoxymethyl-lawsone (LAW). Results demonstrated that association between these drugs enhanced leishmanicidal activity on Leishmania (Leishmania) amazonensis infection. The compounds were tested in monotherapy or in combinations (3:1; 1:1 and 1:3) and reduced intracellular parasite numbers, measured by the endocytic index, in all tested conditions. The most effective combination regimens were MA/LAP or MA/LAW in 3:1 ratio, which achieved a reduction of 98.3% and 93.6% in the endocytic index, respectively. BALB/c mice challenged with L. (L.) amazonensis showed significant reduction in lesion size and parasite load in both footpad and lymph nodes, after four weeks of treatment. Although, MA, LAP or LAW monotherapy were able to control the evolution of lesions when compared to untreated animals (30%, 40% and 40% of reduction, respectively), the combination of MA/LAP and LAW in 3:1 ratio showed better results reducing 61.7 and 54.4%, respectively. The results indicate that the association of meglumine antimoniate to oxiranes lead to an increment in the antileishmanial activity and represent a promising approach for the cutaneous leishmaniasis treatment. Display omitted •Meglumine antimoniate with oxiranes enhanced effect against Leishmania infection.•The most effective treatment in vitro infection was observed in a 3:1 ratio.•Mice treatment with drugs caused reductions in lesion size and parasite load.•Antimony-based combination has the potential for leishmaniasis treatment.
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in: SICRIS
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