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Santana Filho PC, Brasil da Silva M, Malaquias da Silva BN, Fazolo T, Dorneles GP, Braun de Azeredo J, Alf da Rosa M, Rodrigues Júnior LC, Peres A, Santos Canto RF, Torres Romão PR. Seleno-indoles trigger reactive oxygen species and mitochondrial dysfunction in Leishmania amazonensis. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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da Rosa Monte Machado G, Neiva Lavorato S, Lopes W, Henning Vainstein M, Lettieri Teixeira M, José Alves R, de Andrade SF, Meneghello Fuentefria A. A chloroacetamide derivative as a potent candidate for fusariosis treatment. Braz J Microbiol 2022; 53:1289-1295. [PMID: 35648381 DOI: 10.1007/s42770-022-00771-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 12/24/2021] [Indexed: 11/27/2022] Open
Abstract
Fusariosis has presented a significant increase in their incidence in the last years. This epidemiological panorama probably is due to the increasing profile of refractory susceptibility of Fusarium spp. to available drugs, especially in immunocompromised individuals. Thus, the development of new compounds with effectiveness on these organisms is a necessity. This study evaluated the antifungal potential of a chloroacetamide derivative (4-BFCA) against resistant Fusarium strains. As a result, the compound was effective against all strains (MIC range 12.5-50 μg/mL). The time kill assay demonstrated that 4-BFCA presents a concentration-dependent fungicidal action. Although its action mechanism has not yet been elucidated, it was possible to observe its efficacy through damages and alterations provoked along the hyphae of Fusarium spp. 4-BFCA maintained a high survival rate of Tenebrio molitor larvae, suggesting that it does not cause acute systemic toxicity on this host at the concentration evaluated. In addition, 4-BFCA was 83.33% effective in combating a fungal infection in vivo on the chorioallantoid membrane of embryonated eggs. Our results are very promising and arouse interest to investigate the action of 4-BFCA on Fusarium strains since it acts as a possible candidate for the development of new therapies for the treatment of fusariosis.
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Affiliation(s)
- Gabriella da Rosa Monte Machado
- Graduate Program in Agricultural Microbiology and Environment, Federal University of Rio Grande Do Sul, Sarmento Leite no 500 - Farroupilha, Porto Alegre, RS, 90050-170, Brazil. .,Laboratório de Pesquisa Em Micologia Aplicada, Faculdade de Farmácia, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil.
| | - Stefânia Neiva Lavorato
- Center for Biological and Health Sciences, Federal University of Oeste da Bahia, Rua da Prainha no 1326 Morada Nobre, Barreiras, BA, 47810-047, Brazil
| | - William Lopes
- Biotechnology Center, Federal University of Rio Grande Do Sul, Bento Gonçalves no 9500 - Campus do Vale, Porto Alegre, RS, 91501-970, Brazil
| | - Marilene Henning Vainstein
- Biotechnology Center, Federal University of Rio Grande Do Sul, Bento Gonçalves no 9500 - Campus do Vale, Porto Alegre, RS, 91501-970, Brazil
| | - Mário Lettieri Teixeira
- Pharmacology Laboratory, Federal Catarinense Institute, Highway SC 283 - Fragosos, Campus Concórdia, Concórdia, SC, 89703-720, Brazil
| | - Ricardo José Alves
- Department of Pharmaceutical Products, Faculty of Pharmacy, Federal University of Minas Gerais, Presidente Antônio Carlos no 6627 - Campus Pampulha, Belo Horizonte, Belo Horizonte, MG, 31270-901, Brazil
| | - Saulo Fernandes de Andrade
- Graduate Program in Agricultural Microbiology and Environment, Federal University of Rio Grande Do Sul, Sarmento Leite no 500 - Farroupilha, Porto Alegre, RS, 90050-170, Brazil
| | - Alexandre Meneghello Fuentefria
- Graduate Program in Agricultural Microbiology and Environment, Federal University of Rio Grande Do Sul, Sarmento Leite no 500 - Farroupilha, Porto Alegre, RS, 90050-170, Brazil
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Anti-Staphylococcus aureus Methicillin-Resistant (MRSA) Activity of a Novel 3-Chalcogenyl Indole. SCIENTIA MEDICA 2021. [DOI: 10.15448/1980-6108.2021.1.41325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Objective: the development of new drugs against Methicillin-resistant Staphylococcus aureus is a priority to the World Health Organization. So, the objective of this study was to evaluate the antibacterial activity and toxicity of 5-bromo-3-((4-methoxyphenyl) sulfenyl)-1H-indole (3b) against MRSA.Methods: minimum inhibitory concentration (MIC) of 3b was determined against S. aureus ATCC 29213 and 43 clinical isolates. The time-kill assay was performed for 9 isolates. Analysis of variance followed by the post hoc Bonferroni test was used for the statistical tests.Results and conclusions: the MIC50 and MIC90 of 3b were 4 μg.mL-1 and 16 μg.mL-1 respectively. In time-kill assay, the 3b showed bactericidal activity to all evaluated isolates at concentrations of 1xMIC and 2xMIC and the re-growth effect was not observed. About the toxicity tests, 3b has not presented cytotoxicity, mutagenicity, or allergenicity. 3b had particularly good activity against MRSA demonstrating high potential for the development of new antimicrobials products.
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Bazana LCG, Carvalho ÂR, Silveira GP, S. de Oliveira LF, Teixeira ML, Lopes W, Vainstein MH, Barbosa FAR, Russo TVC, Sá MM, Canto RFS, Fuentefria AM. Allylic Selenocyanates as Antifungal Agents Against Pathogenic
Candida
Species. ChemistrySelect 2020. [DOI: 10.1002/slct.202002170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Luana C. G. Bazana
- Laboratório de Pesquisa em Micologia Aplicada Faculdade de Farmácia-Anexo 2, UFRGS Rua São Luis 154 90470440 Porto Alegre Brazil
| | - Ânderson R. Carvalho
- Laboratório de Pesquisa em Micologia Aplicada Faculdade de Farmácia-Anexo 2, UFRGS Rua São Luis 154 90470440 Porto Alegre Brazil
| | - Gustavo P. Silveira
- Departamento de Química Orgânica Instituto de Química, UFRGS Avenida Bento Gonçalves 9500 90650-001 Porto Alegre Brazil
| | | | - Mário L. Teixeira
- Laboratório de Pesquisa em Toxicologia e Farmacologia IFC SC 283 -Km 8 89700-000 Concordia Brazil
| | - William Lopes
- Departamento de Biologia Molecular e Biotecnologia UFRGS Avenida Bento Gonçalves 9500 91501-970 Porto Alegre Brazil
| | - Marilene H. Vainstein
- Departamento de Biologia Molecular e Biotecnologia UFRGS Avenida Bento Gonçalves 9500 91501-970 Porto Alegre Brazil
| | - Flavio A. R. Barbosa
- Departamento de Química, UFSC Rua Engenheiro Agronômico Andrei Cristian Ferreira 88040-900 Florianópolis Brazil
| | - Theo V. C. Russo
- Departamento de Química, UFSC Rua Engenheiro Agronômico Andrei Cristian Ferreira 88040-900 Florianópolis Brazil
| | - Marcus M. Sá
- Departamento de Química, UFSC Rua Engenheiro Agronômico Andrei Cristian Ferreira 88040-900 Florianópolis Brazil
| | - Rômulo F. S. Canto
- Departamento de Farmacociências UFCSPA Rua Sarmento Leite 287 90050-170 Porto Alegre Brazil
| | - Alexandre M. Fuentefria
- Laboratório de Pesquisa em Micologia Aplicada Faculdade de Farmácia-Anexo 2, UFRGS Rua São Luis 154 90470440 Porto Alegre Brazil
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Synthesis of isothiosemicarbazones of potential antitumoral activity through a multicomponent reaction involving allylic bromides, carbonyl compounds and thiosemicarbazide. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Synthesis of Novel Selenocyanates and Evaluation of Their Effect in Cultured Mouse Neurons Submitted to Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:5417024. [PMID: 33093936 PMCID: PMC7275203 DOI: 10.1155/2020/5417024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/01/2020] [Accepted: 05/05/2020] [Indexed: 12/13/2022]
Abstract
Herein, we report the synthesis of novel selenocyanates and assessment of their effect on the oxidative challenge elicited by hydrogen peroxide (H2O2) in cultured mouse neurons. First, α-methylene-β-hydroxy esters were prepared as precursors of allylic bromides. A reaction involving the generated bromides and sodium selenocyanate was conducted to produce the desired selenocyanates (3a-f). We next prepared cultures of neurons from 7-day-old mice (n = 36). H2O2 (10-5 M) was added into the culture flasks as an oxidative stress inducer, alone or combined with one of each designed compounds. (PhSe)2 was used as a positive control. It was carried out assessment of lipid (thiobarbituric acid reactive species, 4-hydroxy-2'-nonenal, 8-isoprostane), DNA (8-hydroxy-2'-deoxyguanosine), and protein (carbonyl) modification parameters. Finally, catalase and superoxide dismutase activities were also evaluated. Among the compounds, 3b, 3d, and 3f exhibited the most pronounced pattern of antioxidant activity, similar to (PhSe)2. These novel aromatic selenocyanates could be promising to be tried in most sophisticated in vitro studies or even at the preclinical level.
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Dalla Lana DF, Batista BG, da Rosa Machado G, Teixeira ML, de Oliveira LFS, Machado MM, de Andrade SF, Lopes W, Vainstein MH, de Abreu Lima AP, Pandolfi E, Silva EE, Fuentefria AM, Silveira GP. Design, synthesis, and evaluation of novel 2-substituted 1,4-benzenediol library as antimicrobial agents against clinically relevant pathogens. Saudi Pharm J 2019; 27:1064-1074. [PMID: 31885466 PMCID: PMC6921195 DOI: 10.1016/j.jsps.2019.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 09/22/2019] [Indexed: 12/27/2022] Open
Abstract
Development of new antimicrobial agents, capable of combating resistant and multidrug-resistant fungal and bacterial clinical strains, is necessary. This study presents the synthesis and antimicrobial screening of 42 2-substituted-1,4-benzenediols, being 10 novel compounds. In total, 23 compounds showed activity against fungi and/or bacteria. Benzenediol compounds 2, 5, 6, 8, 11, and 12 demonstrated broad spectrum antimicrobial actions, including resistant and multidrug-resistant species of dermatophytes (Trichophyton mentagrophytes), Candida spp. and the ESKAPE panel of bacteria. Minimum inhibitory concentrations of these compounds for fungi and bacterial strains ranged from 25 to 50 µg/ml and 8-128 µg/ml, respectively. The antifungal mechanism of action is related to the fungal cell wall of dermatophytes and membrane disruption to dermatophytes and yeasts, in the presence of compound 8. Specific structural changes, such as widespread thinning along the hyphae and yeast lysis, were observed by scanning electron microscopy. The effects of compound 8 on cell viability are dose-dependent; however they did not cause genotoxicity and mutagenicity in human leukocyte cells nor haemolysis. Moreover, the compounds were identified as nonirritant by the ex-vivo Hen's egg test-chorioallantoic membrane (HET-CAM). The furan-1,4-benzenediol compound 5 showed in vivo efficacy to combat S. aureus infection using embryonated chicken eggs. Therefore, the compounds 8, and 5 are promising as hits for the development of new antimicrobial drugs with reduced toxicity.
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Affiliation(s)
- Daiane Flores Dalla Lana
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bruna Gerardon Batista
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gabriella da Rosa Machado
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Mário Lettieri Teixeira
- Laboratory of Biochemistry and Toxicology, Instituto Federal de Santa Catarina, Concordia, SC, Brazil
| | - Luís Flávio Souza de Oliveira
- Center for Studies in Biochemistry, Immunology and Toxicology, Universidade Federal do Pampa, Uruguaiana, RS, Brazil
| | - Michel Mansur Machado
- Center for Studies in Biochemistry, Immunology and Toxicology, Universidade Federal do Pampa, Uruguaiana, RS, Brazil
| | - Saulo Fernandes de Andrade
- Department of Raw Materials Production, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - William Lopes
- Department of Molecular Biology and Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marilene Henning Vainstein
- Department of Molecular Biology and Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Alejandro Peixoto de Abreu Lima
- Laboratorio de Síntesis Orgánica, Departamento de Química Orgánica, Facultad de Química, CP11800, Universidad de la República, Montevideo, Uruguay
| | - Enrique Pandolfi
- Laboratorio de Síntesis Orgánica, Departamento de Química Orgánica, Facultad de Química, CP11800, Universidad de la República, Montevideo, Uruguay
| | - Edilma Elayne Silva
- Department of Organic Chemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Alexandre Meneghello Fuentefria
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gustavo Pozza Silveira
- Department of Organic Chemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Dalla Lana DF, Carvalho ÂR, Lopes W, Vainstein MH, Guimarães LSP, Teixeira ML, de Oliveira LFS, Machado MM, de Andrade SF, Sá MM, Russo TVC, Silveira GP, Fuentefria AM. Structure-based design of δ-lactones for new antifungal drug development: susceptibility, mechanism of action, and toxicity. Folia Microbiol (Praha) 2019; 64:509-519. [PMID: 30734157 DOI: 10.1007/s12223-018-00675-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 12/26/2018] [Indexed: 01/26/2023]
Abstract
Dermatophytes are the etiological agents of cutaneous mycoses, including the prevalent nail infections and athlete's foot. Candida spp. are opportunistic and emerging pathogens, causing superficial to deeper infections related to high mortality rates. As a consequence of prolonged application of antifungal drugs, the treatment failures combined with multidrug-resistance have become a serious problem in clinical practice. Therefore, novel alternative antifungals are required urgently. δ-Lactones have attracted great interest owing to their wide range of biological activity. This article describes the antifungal activity of synthetic δ-lactones against yeasts of the genus Candida spp. and dermatophytes (through the broth microdilution method), discusses the pathways by which the compounds exert this action (toward the fungal cell wall and/or membrane), and evaluates the toxicity to human leukocytes and chorioallantoic membrane (by the hen's egg test-chorioallantoic membrane). Two of the compounds in the series presented broader spectrum of antifungal activity, including against resistant fungal species. The mechanism of action was related to damage in the fungal cell wall and membrane, with specific target action dependent on the type of substituent present in the δ-lactone structure. The damage in the fungal cell was corroborated by electron microscopy images, which evidenced lysed and completely altered cells after in vitro treatment with δ-lactones. Toxicity was dose dependent for the viability of human leukocytes, but none of the compounds was mutagenic, genotoxic, or membrane irritant when evaluated at higher concentrations than MIC. In this way, δ-lactones constitute a class with excellent perspectives regarding their potential applications as antifungals.
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Affiliation(s)
- Daiane F Dalla Lana
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
| | - Ânderson R Carvalho
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - William Lopes
- Department of Molecular Biology and Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marilene H Vainstein
- Department of Molecular Biology and Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Luciano S P Guimarães
- Biostatistics Unit, Research Group and Post-graduation, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil
| | - Mário L Teixeira
- Laboratory of Biochemistry and Toxicology, Instituto Federal de Santa Catarina, Concordia, SC, Brazil
| | - Luis F S de Oliveira
- Center for Studies in Biochemistry, Immunology, and Toxicology, Universidade Federal do Pampa, Uruguaiana, RS, Brazil
| | - Michel M Machado
- Center for Studies in Biochemistry, Immunology, and Toxicology, Universidade Federal do Pampa, Uruguaiana, RS, Brazil
| | - Saulo F de Andrade
- Department of Raw Materials Production, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marcus M Sá
- Department of Chemistry, Universidade Federal de Santa Catarina, Florianopolis, SC, Brazil
| | - Theo V C Russo
- Department of Chemistry, Universidade Federal de Santa Catarina, Florianopolis, SC, Brazil
| | - Gustavo P Silveira
- Department of Organic Chemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Alexandre M Fuentefria
- Laboratory of Applied Mycology, Department of Analysis, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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