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de Luna AV, Fagundes TDSF, Ramos YJ, de Araújo MH, Muzitano MF, Calixto SD, Simão TLBV, de Queiroz GA, Guimarães EF, Marques AM, Moreira DDL. UHPLC-HRMS/MS Chemical Fingerprinting of the Bioactive Partition from Cultivated Piper aduncum L. Molecules 2024; 29:1690. [PMID: 38675510 PMCID: PMC11051932 DOI: 10.3390/molecules29081690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 03/30/2024] [Accepted: 04/04/2024] [Indexed: 04/28/2024] Open
Abstract
Piper aduncum L. is widely distributed in tropical regions and the ethnobotanical uses of this species encompass medicinal applications for the treatment of respiratory, antimicrobial, and gynecological diseases. Chemical studies reveal a diverse array of secondary metabolites, including terpenes, flavonoids, and prenylated compounds. Extracts from P. aduncum have shown antibacterial, antifungal, and larvicidal activities. Our study explores the activity of extracts and partitions against Mycobacterium tuberculosis H37Rv, as well as the chemical diversity of the bioactive partition. This marks the first investigation of the bioactive partition of P. aduncum from agroecological cultivation. The ethyl acetate partition from the ethanolic leaf extract (PAEPL) was found to be the most active. PAEPL was subjected to column chromatography using Sephadex LH-20 and the obtained fractions were analyzed using UHPLC-HRMS/MS. The MS/MS data from the fractions were submitted to the online GNPS platform for the generation of the molecular network, which displayed 1714 nodes and 167 clusters. Compounds were identified via manual inspection and different libraries, allowing the annotation of 83 compounds, including flavonoids, benzoic acid derivatives, glycosides, free fatty acids, and glycerol-esterified fatty acids. This study provides the first chemical fingerprint of an antimycobacterial sample from P. aduncum cultivated in an agroecological system.
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Affiliation(s)
- Adélia Viviane de Luna
- Postgraduate Program in Translational Research in Drugs and Medicines, Pharmaceutical Technology Institute, Far-Manguinhos, Fiocruz, Rua Sizenando Nabuco, 100, Manguinhos, Rio de Janeiro 21041-250, RJ, Brazil; (A.V.d.L.); (A.M.M.)
| | - Thayssa da Silva Ferreira Fagundes
- Botanical Garden Research Institute of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, RJ, Brazil; (T.d.S.F.F.); (G.A.d.Q.); (E.F.G.)
- Marine Biotechnology Departament, Almirante Paulo Moreira Institute of Marine Studies, Rua Kioto, 253, Arraial do Cabo, Rio de Janeiro 28930-000, RJ, Brazil
| | - Ygor Jessé Ramos
- Farmácia da Terra Laboratory, Faculty of Pharmacy, Federal University of Bahia, Rua Barão de Jeremoabo, 147, Ondina, Salvador 40170-115, BA, Brazil
| | - Marlon Heggdorne de Araújo
- Laboratory of Bioatives Products, Institute of Pharmaceutical Sciences, Federal University of Rio de Janeiro, Rua Alcides da Conceição, 159, Macaé 27933-378, RJ, Brazil; (M.H.d.A.); (M.F.M.)
| | - Michelle Frazão Muzitano
- Laboratory of Bioatives Products, Institute of Pharmaceutical Sciences, Federal University of Rio de Janeiro, Rua Alcides da Conceição, 159, Macaé 27933-378, RJ, Brazil; (M.H.d.A.); (M.F.M.)
| | - Sanderson Dias Calixto
- Recenor Biology Laboratory, Center of Biosciences and Biotechnology, State University of North Fluminense Darcy Ribeiro, Rua Alberto Lamego, 2000, Campos dos Goytacazes 28013-602, RJ, Brazil; (S.D.C.); (T.L.B.V.S.)
| | - Thatiana Lopes Biá Ventura Simão
- Recenor Biology Laboratory, Center of Biosciences and Biotechnology, State University of North Fluminense Darcy Ribeiro, Rua Alberto Lamego, 2000, Campos dos Goytacazes 28013-602, RJ, Brazil; (S.D.C.); (T.L.B.V.S.)
| | - George Azevedo de Queiroz
- Botanical Garden Research Institute of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, RJ, Brazil; (T.d.S.F.F.); (G.A.d.Q.); (E.F.G.)
- Pharmacy Departament, State University of Rio de janeiro, Manuel Caldeira de Alvarenga 1203 st, Campo Grande, Rio de Janeiro 23070-200, RJ, Brazil
| | - Elsie Franklin Guimarães
- Botanical Garden Research Institute of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, RJ, Brazil; (T.d.S.F.F.); (G.A.d.Q.); (E.F.G.)
| | - André Mesquita Marques
- Postgraduate Program in Translational Research in Drugs and Medicines, Pharmaceutical Technology Institute, Far-Manguinhos, Fiocruz, Rua Sizenando Nabuco, 100, Manguinhos, Rio de Janeiro 21041-250, RJ, Brazil; (A.V.d.L.); (A.M.M.)
| | - Davyson de Lima Moreira
- Postgraduate Program in Translational Research in Drugs and Medicines, Pharmaceutical Technology Institute, Far-Manguinhos, Fiocruz, Rua Sizenando Nabuco, 100, Manguinhos, Rio de Janeiro 21041-250, RJ, Brazil; (A.V.d.L.); (A.M.M.)
- Botanical Garden Research Institute of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, RJ, Brazil; (T.d.S.F.F.); (G.A.d.Q.); (E.F.G.)
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de Souza MQ, Bierhals DV, Reis AJ, Chimara E, Vianna JS, von Groll A, da Silva PA, Ramis IB. 2,3,5-triphenyl tetrazolium chloride as colorimetric indicator for drug susceptibility testing against nontuberculous mycobacteria. Diagn Microbiol Infect Dis 2024; 108:116096. [PMID: 37931387 DOI: 10.1016/j.diagmicrobio.2023.116096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 09/04/2023] [Accepted: 09/22/2023] [Indexed: 11/08/2023]
Abstract
This study aimed to propose and evaluate a drug susceptibility testing (DST) using the 2,3,5-triphenyl tetrazolium chloride (TTC) as a colorimetric indicator against Mycobacterium abscessus complex (MABC), M. avium complex (MAC), and M. kansasii strains, main nontuberculous mycobacteria (NTM) of clinical relevance. Our results demonstrated that the assay using TTC and the broth microdilution method recommended by the Clinical and Laboratory Standards Institute had essential agreement above 91%, 92%, and 100%, for drugs tested against MABC, MAC, and M. kansasii strains, respectively. Categorical agreement above 91% was obtained for most drugs tested against MABC, except to cefoxitin (76.5%). For drugs tested against MAC and M. kansasii, categorical agreement above 92% and 100% was observed, respectively. TTC showed to be a promising colorimetric indicator of growth to be used in DST for NTM, allowing an easier reading of results.
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Affiliation(s)
- Mariana Quaresma de Souza
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Dienefer Venske Bierhals
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Ana Julia Reis
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Erica Chimara
- Núcleo de Tuberculose e Micobacterioses, Instituto Adolfo Lutz, São Paulo, Brazil
| | - Júlia Silveira Vianna
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Andrea von Groll
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Pedro Almeida da Silva
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil.
| | - Ivy Bastos Ramis
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
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de Souza Passos M, Nogueira TSR, da Silva Robaina RR, Calixto SD, Simão TLBV, Muzitano MF, Lassounskaia E, Braz-Filho R, Curcino Vieira IJ. Antimycobacterial and nitric oxide production inhibitory activities of limonoids isolated from Trichilia lepidota subsp. schumanniana (Harms) T.D.Penn. PHYTOCHEMISTRY 2023; 214:113818. [PMID: 37558193 DOI: 10.1016/j.phytochem.2023.113818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 08/01/2023] [Accepted: 08/04/2023] [Indexed: 08/11/2023]
Abstract
Six previously undescribed intact limonoids together with four known compounds were isolated from the seeds of Trichilia lepidota subsp. schumanniana (Harms) T.D.Penn. Their structures were characterized based on one- and two-dimensional nuclear magnetic resonance spectra, infrared, ultraviolet, mass spectroscopy results, and optical rotation. All compounds were evaluated for their ability to inhibit nitric oxide production in cultures of RAW 264.7 macrophages stimulated by lipopolysaccharide, cytotoxicity and growth of Mycobacterium tuberculosis strains H37Rv and M299. The compounds 7-deacetyl-11β,12α-diacetoxy-14,15-epoxyazadirone (5) and walsurin E (9) were the most potent in inhibiting nitric oxide production, although the compounds 1-deshydroxy-12α-acetoxymunronin N (1) and 6α,12α-dihydroxyazadirone (6) also showed controlled potential of this mediator, in addition to being potent growth inhibitors of Mycobacterium tuberculosis H37RV and M299, without cytotoxicity interference. Ring intact limonoids isolated from Trichilia lepidota subsp. schumanniana seeds are a new source of bioactive substances that may be used in the future against diseases such as tuberculosis and other processes related to inflammation.
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Affiliation(s)
- Michel de Souza Passos
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Setor de Química dos Produtos Naturais, Laboratório de Ciências Químicas, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Thalya Soares Ribeiro Nogueira
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Setor de Química dos Produtos Naturais, Laboratório de Ciências Químicas, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Renata Rodrigues da Silva Robaina
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Setor de Química dos Produtos Naturais, Laboratório de Ciências Químicas, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Sanderson Dias Calixto
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Biologia do Reconhecer, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Thatiana Lopes Biá Ventura Simão
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Biologia do Reconhecer, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Michelle Frazão Muzitano
- Universidade Federal do Rio de Janeiro, Laboratório de Produtos Bioativos, CEP 27930-560, Macaé, RJ, Brazil
| | - Elena Lassounskaia
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Biologia do Reconhecer, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil
| | - Raimundo Braz-Filho
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Setor de Química dos Produtos Naturais, Laboratório de Ciências Químicas, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil; Departamento de Química, Instituto de Química, Universidade Federal Rural do Rio de Janeiro, CEP 20000-000, Seropédica, RJ, Brazil
| | - Ivo José Curcino Vieira
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Setor de Química dos Produtos Naturais, Laboratório de Ciências Químicas, Avenida Alberto Lamego 2000, CEP 28013-602, Campos dos Goytacazes, RJ, Brazil.
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Phosphopantetheinyl transferase binding and inhibition by amidino-urea and hydroxypyrimidinethione compounds. Sci Rep 2021; 11:18042. [PMID: 34508141 PMCID: PMC8433221 DOI: 10.1038/s41598-021-97197-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 08/23/2021] [Indexed: 12/12/2022] Open
Abstract
Owing to their role in activating enzymes essential for bacterial viability and pathogenicity, phosphopantetheinyl transferases represent novel and attractive drug targets. In this work, we examined the inhibitory effect of the aminido-urea 8918 compound against the phosphopantetheinyl transferases PptAb from Mycobacterium abscessus and PcpS from Pseudomonas aeruginosa, two pathogenic bacteria associated with cystic fibrosis and bronchiectasis, respectively. Compound 8918 exhibits inhibitory activity against PptAb but displays no activity against PcpS in vitro, while no antimicrobial activity against Mycobacterium abscessus or Pseudomonas aeruginosa could be detected. X-ray crystallographic analysis of 8918 bound to PptAb-CoA alone and in complex with an acyl carrier protein domain in addition to the crystal structure of PcpS in complex with CoA revealed the structural basis for the inhibition mechanism of PptAb by 8918 and its ineffectiveness against PcpS. Finally, in crystallo screening of potent inhibitors from the National Cancer Institute library identified a hydroxypyrimidinethione derivative that binds PptAb. Both compounds could serve as scaffolds for the future development of phosphopantetheinyl transferases inhibitors.
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Evaluation of Accuracy of Microplate Alamar Blue Assay and Proportion Method for Prompt Detection of Mycobacterium tuberculosis and Clinical Isolates of Multidrug-resistant M. tuberculosis. Jundishapur J Microbiol 2021. [DOI: 10.5812/jjm.111212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Tuberculosis is appraised to cause the deaths of more than a billion people in the last decades. Objectives: The current study compares the performance of microplate Alamar blue assay for clinical isolates of Mycobacterium tuberculosis and multidrug-resistant tuberculosis. Microplate Alamar blue assay was performed in a central tuberculosis laboratory at Golestan University of Medical Sciences in Gorgan, Iran. Methods: In the first step, the microplate Alamar blue assay was used for the detection of 78 clinical isolates in the Golestan regional tuberculosis reference laboratory, and the results were compared with those of the proportion assay. In the second step, the microplate Alamar blue assay and the proportion assay were used for the drug-susceptibility of 35 isolates. Results: In the microplate Alamar blue assay, the sensitivity was 100 (90.97 - 100), with a specificity of 74.36 (57.87 - 86.96), positive predictive value of 79.59 (65.66 - 89.76), and negative predictive value of 100 (88.06 - 100). For the microplate Alamar blue assay with rifampin, the sensitivity was 100 (89.11 - 100), specificity was 100 (29.24 - 100), positive predictive value was 100 (89.11 - 100), and negative predictive value was 100 (29.24 - 100). For the microplate Alamar blue assay with isoniazid, the sensitivity was 84.38 (67.21 - 94.72), specificity was 66.67 (9.43 - 99.16), positive predictive value was 96.43 (81.65 - 99.91), and negative predictive value was 28.57 (3.67 - 70.96). Conclusions: We found high accuracy between the microplate Alamar blue assay with rifampin and the proportion assay. The rapid and low-cost microplate Alamar blue assay is an inexpensive and appropriate assay for the detection of rifampin-resistant tuberculosis in low-income countries.
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Araujo MHD, Simão TLBV, Konno TUP, Guimarães DO, Leal ICR, Lasunskaia E, Muzitano MF. Anti-mycobacterial and anti-inflammatory activity of restinga plants: a dual approach in searching for new drugs to treat severe tuberculosis. RODRIGUÉSIA 2021. [DOI: 10.1590/2175-7860202172040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract Tuberculosis (TB) still constitutes a threat to public health in various regions of the world. The existing treatment is long and has many side effects. The need to identify new anti-TB compounds and also adjuvants to control exacerbated inflammation in severe TB cases is relevant. Therefore, the objective of this study was to evaluate the anti-mycobacterial activity of extracts and fractions in vitro from plant species collected in the Restinga of Jurubatiba, in Rio de Janeiro state, Brazil. In addition, to verify their immunomodulatory action and cytotoxicity on macrophages. The dichloromethane fraction of Kielmeyera membranacea and Eremanthus crotonoides showed the lowest MIC50 against Mycobacterium bovis BCG (0.95 ± 1.08 and 2.17 ± 1.11 μg/mL, respectively) and M. tuberculosis H37Rv (4.38 ± 1.19 and 15.28 ± 1.21 μg/mL, respectively). They were also able to inhibit the NO and TNF-α production in LPS-stimulated macrophages, without being toxic to cells. Using gas chromatography analysis coupled with mass spectrometer it was possible to suggest the presence of fatty acids and terpenes in the most promising fractions. Those compounds have been described for their anti-mycobacterial activity. These results have enabled identifying Kielmeyera membranacea and Eremanthus crotonoides as the most promising studied species in searching for new anti-TB compounds with dual activity.
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Costa IFDJB, Simão TLBV, Calixto SD, Pereira RV, Konno TUP, Pinto SC, Tinoco LW, Lasunskaia E, Leal ICR, Muzitano MF. Anti-mycobacterial and immunomodulatory activity of n-hexane fraction and spathulenol from Ocotea notata leaves. RODRIGUÉSIA 2021. [DOI: 10.1590/2175-7860202172041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract Ocotea notata (Lauraceae) is popularly known as white-cinnamon. Ocotea species have several medicinal uses, especially for treating chest pain, rheumatism and wounds. The present study aimed to analyze the chemical composition of O. notata n-hexane fraction, in addition to its anti-mycobacterial and immunomodulatory activities. The n-hexane fraction was analyzed by GC-MS and was chromatographed to afford 15 subfractions (SF1-15), where SF5 was identified, by GC-MS and NMR, as the sesquiterpene spathulenol. The n-hexane fraction was the most potent in inhibiting nitric oxide (NO) and tumor necrosis factor-alpha (TNF-α) production on LPS-stimulated macrophages (IC50 8.3 ± 0.9 and 5.9 ±1.0 μg/mL, respectively). SF4, a major subfraction, that presents a spathulenol analogous as a constituent, also inhibited NO and TNF-α production. Spathulenol only modulated NO production (IC50 45.6 ± 1.4 μg/mL). The n-hexane fraction, SF4, and spathulenol revealed antimycobacterial activity against Mycobacterium bovis BCG, M. tuberculosis H37Rv, and M299 strains. Spathulenol inhibited the growth of Mtb H37Rv with MIC50 36.9 ± 1.5 μg/mL (167.5 ± 6.8 μM), and Mtb M299 with MIC5042.1 ± 0.5 μg/mL (191.0 ± 2.2 μM). This is the first report describing the isolation of spathulenol from O. notata leaves and its anti-mycobacterial activity.
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Jesus CCMD, Araújo MHD, Simão TLBV, Lasunskaia EB, Barth T, Muzitano MF, Pinto SC. Natural products from Vitex polygama and their antimycobacterial and anti-inflammatory activity. Nat Prod Res 2020; 36:1337-1341. [PMID: 33380215 DOI: 10.1080/14786419.2020.1868461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Tuberculosis (TB) remains a worldwide public health threat because of the emergence of resistant strains and subsequent inappropriate response to current therapy. We have been studying the restinga plants' antimycobacterial and anti-inflammatory potential. Dichloromethane fraction (DCM) from Vitex polygama Cham. showed high activity against Mycobacterium tuberculosis (Mtb) H37Rv. In this context, DCM fraction and isolated compounds were investigated against Mtb H37Rv and M299 (MDR strain) and for their immunomodulatory and cytotoxicity actions. Orientin showed the best antimycobacterial effect against Mtb M299 MDR strain (MIC50 15.4 ± 1.6 µg/mL), capacity of inhibiting NO production by macrophages (IC50 6.5 ± 1.2 µg/mL) and no significant cytotoxicity. The antimycobacterial effect of orientin was also observed on Mtb H37Rv intracellular growth in RAW 264.7 macrophages (MIC50 3.5 ± 1.1 and MIC90 9.1 ± 1.0 µg/mL). This is the first report describing the antimycobacterial effect of orientin, in both extra- and intracellular growth.
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Affiliation(s)
- Cristiane Catela Martins de Jesus
- Programa de Pós-graduação em Produtos Bioativos e Biociências, Universidade Federal do Rio de Janeiro, Macaé, Brazil.,Laboratório de Produtos Bioativos, Farmácia, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Marlon Heggdorne de Araújo
- Programa de Pós-graduação em Produtos Bioativos e Biociências, Universidade Federal do Rio de Janeiro, Macaé, Brazil.,Laboratório de Produtos Bioativos, Farmácia, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Thatiana Lopes Biá Ventura Simão
- Laboratório de Produtos Bioativos, Farmácia, Universidade Federal do Rio de Janeiro, Macaé, Brazil.,Laboratório de Biologia do Reconhecer, Centro de Biociências e Biotecnologia, Universidade Estatual do Norte Fluminense, Campos dos Goytacazes, Brazil
| | - Elena B Lasunskaia
- Laboratório de Biologia do Reconhecer, Centro de Biociências e Biotecnologia, Universidade Estatual do Norte Fluminense, Campos dos Goytacazes, Brazil
| | - Thiago Barth
- Programa de Pós-graduação em Produtos Bioativos e Biociências, Universidade Federal do Rio de Janeiro, Macaé, Brazil.,Laboratório de Produtos Bioativos, Farmácia, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Michelle Frazão Muzitano
- Programa de Pós-graduação em Produtos Bioativos e Biociências, Universidade Federal do Rio de Janeiro, Macaé, Brazil.,Laboratório de Produtos Bioativos, Farmácia, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Shaft Corrêa Pinto
- Laboratório de Produtos Bioativos, Farmácia, Universidade Federal do Rio de Janeiro, Macaé, Brazil
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Phytochemical screening, antioxidant and antimicrobial activities of Opuntia streptacantha fruit skin. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2020. [DOI: 10.1007/s11694-020-00518-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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The Contribution of Efflux Pumps in Mycobacterium abscessus Complex Resistance to Clarithromycin. Antibiotics (Basel) 2019; 8:antibiotics8030153. [PMID: 31540480 PMCID: PMC6784190 DOI: 10.3390/antibiotics8030153] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 09/13/2019] [Accepted: 09/16/2019] [Indexed: 11/25/2022] Open
Abstract
The basis of drug resistance in Mycobacterium abscessus is still poorly understood. Nevertheless, as seen in other microorganisms, the efflux of antimicrobials may also play a role in M. abscessus drug resistance. Here, we investigated the role of efflux pumps in clarithromycin resistance using nine clinical isolates of M. abscessus complex belonging to the T28 erm(41) sequevar responsible for the inducible resistance to clarithromycin. The strains were characterized by drug susceptibility testing in the presence/absence of the efflux inhibitor verapamil and by genetic analysis of drug-resistance-associated genes. Efflux activity was quantified by real-time fluorometry. Efflux pump gene expression was studied by RT-qPCR upon exposure to clarithromycin. Verapamil increased the susceptibility to clarithromycin from 4- to ≥64-fold. The efflux pump genes MAB_3142 and MAB_1409 were found consistently overexpressed. The results obtained demonstrate that the T28 erm(41) polymorphism is not the sole cause of the inducible clarithromycin resistance in M.abscessus subsp. abscessus or bolletii with efflux activity providing a strong contribution to clarithromycin resistance. These data highlight the need for further studies on M. abscessus efflux response to antimicrobial stress in order to implement more effective therapeutic regimens and guidance in the development of new drugs against these bacteria.
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Singh N, Kaur R, Singh BP, Rokana N, Goel G, Puniya AK, Panwar H. Impairment of Cronobacter sakazakii and Listeria monocytogenes biofilms by cell-free preparations of lactobacilli of goat milk origin. Folia Microbiol (Praha) 2019; 65:185-196. [PMID: 31218652 DOI: 10.1007/s12223-019-00721-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 05/28/2019] [Indexed: 01/10/2023]
Abstract
Biofilm-associated bacterial infections represent one of the major threats to modern medical treatments. Bacteria encased in biofilm matrix are more resistant towards antimicrobials and thus the capability of microbes to persist and nurture in a biofilm seems to be the foremost aspect of pathogenesis and therapeutic failure. Therefore, there is a pressing demand for new drugs active against microbial biofilms. In the current study, anti-biofilm potential of Lactobacillus spp. cell-free supernatants (CFSs) against Cronobacter sakazakii and Listeria monocytogenes was characterized using crystal violet staining and MTT assay. CFSs of goat milk origin lactobacilli not only prevented biofilm formation but also disrupted preformed biofilms. Neutralized and heat-treated preparations of Lactobacillus CFSs also inhibited biofilm formation by test pathogens. The results were quantitatively confirmed by light and fluorescent microscopy observations. Biofilms developed under static conditions displayed typical compact microcolonies with uniform distribution over the surface, while upon CFS challenge, biofilms were disrupted with presence of dead cells. These findings highlight the anti-biofilm potency of Lactobacillus spp. strains of goat milk origin and their potential application in food industries.
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Affiliation(s)
- Niharika Singh
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India
| | - Ravinder Kaur
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India
| | - Brij Pal Singh
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India
| | - Namita Rokana
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India
| | - Gunjan Goel
- Central University of Haryana, Mahendergarh, Haryana, 123031, India
| | - Anil Kumar Puniya
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India
| | - Harsh Panwar
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India.
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Felicetti T, Machado D, Cannalire R, Astolfi A, Massari S, Tabarrini O, Manfroni G, Barreca ML, Cecchetti V, Viveiros M, Sabatini S. Modifications on C6 and C7 Positions of 3-Phenylquinolone Efflux Pump Inhibitors Led to Potent and Safe Antimycobacterial Treatment Adjuvants. ACS Infect Dis 2019; 5:982-1000. [PMID: 30907573 DOI: 10.1021/acsinfecdis.9b00041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Nontuberculous mycobacteria (NTM) are ubiquitous microbes belonging to the Mycobacterium genus. Among all NTM pathogens, M. avium is one of the most frequent agents causing pulmonary disease, especially in immunocompromised individuals and cystic fibrosis patients. Recently, we reported the first ad hoc designed M. avium efflux pump inhibitor (EPI; 1b) able to strongly boost clarithromycin (CLA) MIC against different M. avium strains. Since the 3-phenylquinolone derivative 1b suffered from toxicity issues toward human macrophages, herein we report a two-pronged medicinal chemistry workflow for identifying new potent and safe NTM EPIs. Initially, we followed a computational approach exploiting our pharmacophore models to screen FDA approved drugs and in-house compounds to identify "ready-to-use" NTM EPIs and/or new scaffolds to be optimized in terms of EPI activity. Although nicardipine 2 was identified as a new NTM EPI, all identified molecules still suffered from toxicity issues. Therefore, based on the promising NTM EPI activity of 1b, we undertook the design, synthesis, and biological evaluation of new 3-phenylquinolones differently functionalized at the C6/C7 as well as N1 positions. Among the 27 synthesized 3-phenylquinolone analogues, compounds 11b, 12b, and 16a exerted excellent NTM EPI activity at concentrations below their CC50 on human cells, with derivative 16a being the most promising compound. Interestingly, 16a also showed good activity in M. avium-infected macrophages both alone as well as in combination with CLA. The antimycobacterial activity observed for 16a only when tested in the ex vivo model suggests a high therapeutic potential of EPIs against M. avium, which seems to need functional efflux pumps to establish intracellular infections.
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Affiliation(s)
- Tommaso Felicetti
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Diana Machado
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, UNL, Rua da Junqueira 100, 1349-008 Lisboa, Portugal
| | - Rolando Cannalire
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Andrea Astolfi
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Serena Massari
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Oriana Tabarrini
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Giuseppe Manfroni
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Maria Letizia Barreca
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Violetta Cecchetti
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Miguel Viveiros
- Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade NOVA de Lisboa, UNL, Rua da Junqueira 100, 1349-008 Lisboa, Portugal
| | - Stefano Sabatini
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
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Inhibitory effects of lactobacilli of goat's milk origin against growth and biofilm formation by pathogens: an in vitro study. FOOD BIOSCI 2018. [DOI: 10.1016/j.fbio.2018.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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14
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Biological activities and phytochemical profile of Passiflora mucronata from the Brazilian restinga. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2017. [DOI: 10.1016/j.bjp.2017.07.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Randhawa HK, Hundal KK, Ahirrao PN, Jachak SM, Nandanwar HS. Efflux pump inhibitory activity of flavonoids isolated from Alpinia calcarata against methicillin-resistant Staphylococcus aureus. Biologia (Bratisl) 2016. [DOI: 10.1515/biolog-2016-0073] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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16
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Amaral EP, Conceição EL, Costa DL, Rocha MS, Marinho JM, Cordeiro-Santos M, D'Império-Lima MR, Barbosa T, Sher A, Andrade BB. N-acetyl-cysteine exhibits potent anti-mycobacterial activity in addition to its known anti-oxidative functions. BMC Microbiol 2016; 16:251. [PMID: 27793104 PMCID: PMC5084440 DOI: 10.1186/s12866-016-0872-7] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 10/26/2016] [Indexed: 02/06/2023] Open
Abstract
Background Mycobacterium tuberculosis infection is thought to induce oxidative stress. N-acetyl-cysteine (NAC) is widely used in patients with chronic pulmonary diseases including tuberculosis due to its mucolytic and anti-oxidant activities. Here, we tested whether NAC exerts a direct antibiotic activity against mycobacteria. Methods Oxidative stress status in plasma was compared between pulmonary TB (PTB) patients and those with latent M. tuberculosis infection (LTBI) or healthy uninfected individuals. Lipid peroxidation, DNA oxidation and cell death, as well as accumulation of reactive oxygen species (ROS) were measured in cultures of primary human monocyte-derived macrophages infected with M. tuberculosis and treated or not with NAC. M. tuberculosis, M. avium and M. bovis BCG cultures were also exposed to different doses of NAC with or without medium pH adjustment to control for acidity. The anti-mycobacterial effect of NAC was assessed in M. tuberculosis infected human THP-1 cells and bone marrow-derived macrophages from mice lacking a fully functional NADPH oxidase system. The capacity of NAC to control M. tuberculosis infection was further tested in vivo in a mouse (C57BL/6) model. Results PTB patients exhibited elevated levels of oxidation products and a reduction of anti-oxidants compared with LTBI cases or uninfected controls. NAC treatment in M. tuberculosis-infected human macrophages resulted in a decrease of oxidative stress and cell death evoked by mycobacteria. Importantly, we observed a dose-dependent reduction in metabolic activity and in vitro growth of NAC treated M. tuberculosis, M. avium and M. bovis BCG. Furthermore, anti-mycobacterial activity in infected macrophages was shown to be independent of the effects of NAC on the host NADPH oxidase system in vitro. Short-term NAC treatment of M. tuberculosis infected mice in vivo resulted in a significant reduction of mycobacterial loads in the lungs. Conclusions NAC exhibits potent anti-mycobacterial effects and may limit M. tuberculosis infection and disease both through suppression of the host oxidative response and through direct antimicrobial activity. Electronic supplementary material The online version of this article (doi:10.1186/s12866-016-0872-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Eduardo P Amaral
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA.,Department of Immunology, Laboratory of Immunology of Infectious Diseases, Institute of Biomedical Science, University of São Paulo, São Paulo, 05508-900, Brazil
| | - Elisabete L Conceição
- Laboratório Integrado de Microbiologia e Imunorregulação (LIMI), Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, 40296-710, Bahia, Brazil.,Instituto de Ciências da Saúde (ICS), Universidade Federal da Bahia, Salvador, 40110-100, Brazil
| | - Diego L Costa
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Michael S Rocha
- Laboratório Integrado de Microbiologia e Imunorregulação (LIMI), Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, 40296-710, Bahia, Brazil
| | - Jamocyr M Marinho
- Departament of Internal Medicine, School of Medicine and Public Health, Salvador, 41150-100, Brazil.,Programa de Controle da Tuberculose, Hospital Especializado Octávio Mangabeira, Salvador, 40320-350, Brazil
| | - Marcelo Cordeiro-Santos
- Departamento de Ensino e Pós-Graduação, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil.,Programa de Pós-Graduação em Medicina Tropical, Universidade do Estado do Amazonas, Manaus, Brazil
| | - Maria Regina D'Império-Lima
- Department of Immunology, Laboratory of Immunology of Infectious Diseases, Institute of Biomedical Science, University of São Paulo, São Paulo, 05508-900, Brazil
| | - Theolis Barbosa
- Laboratório Integrado de Microbiologia e Imunorregulação (LIMI), Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, 40296-710, Bahia, Brazil.,Instituto de Ciências da Saúde (ICS), Universidade Federal da Bahia, Salvador, 40110-100, Brazil
| | - Alan Sher
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Bruno B Andrade
- Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA. .,Laboratório Integrado de Microbiologia e Imunorregulação (LIMI), Instituto Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, 40296-710, Bahia, Brazil. .,Multinational Organization Network Sponsoring Translational and Epidemiological Research (MONSTER) Initiative, Fundação José Silveira, Salvador, 45204-040, Brazil. .,Curso de Medicina, Faculdade de Tecnologia e Ciências, Salvador, 41741-590, Brazil.
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Biá Ventura TL, da Silva Machado FL, de Araujo MH, de Souza Gestinari LM, Kaiser CR, de Assis Esteves F, Lasunskaia EB, Soares AR, Muzitano MF. Nitric Oxide Production Inhibition and Anti-Mycobacterial Activity of Extracts and Halogenated Sesquiterpenes from the Brazilian Red Alga Laurencia Dendroidea J. Agardh. Pharmacogn Mag 2016; 11:S611-8. [PMID: 27013803 PMCID: PMC4787097 DOI: 10.4103/0973-1296.172972] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Red algae of the genus Laurencia J. V. Lamouroux are a rich source of secondary metabolites with important pharmacological activities such as anti-tumoral, anti-inflammatory, anti-fungal, anti-viral, anti-leishmanial, anti-helminthic, anti-malarial, anti-trypanosomal, anti-microbial as well as anti-bacterial against Mycobacterium tuberculosis. Objective: In the present study, we evaluated the inhibition of nitric oxide (NO) and tumor necrosis factor-α production and the anti-mycobacterial activity of crude extracts from the red Alga Laurencia dendroidea (from the South-Eastern coast of Brazil). Halogenated sesquiterpenes elatol (1), obtusol (2) and cartilagineol (3), previously isolated from this Alga by our group, were also studied. Materials and Methods: The lipopolysaccharide-activated macrophage cells (RAW 264.7) were used as inflammation model. Cytotoxic effect was determined using a commercial lactate dehydrogenase (LDH) kit and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. The growing Mycobacterium inhibition was verified against Mycobacterium bovis Bacillus Calmette–Guérin and M. tuberculosis H37 Rv strains. Results: The crude extract from Alga collected at Angra dos Reis, RJ, Brazil, was the most active inhibitor of both mycobacterial growth (half maximal inhibitory concentration [IC50] 8.7 ± 1.4 μg/mL) and NO production by activated macrophages (IC50 5.3 ± 1.3 μg/mL). The assays with isolated compounds revealed the anti-mycobacterial activity of obtusol (2), whereas (-)-elatol (1) inhibited the release of inflammatory mediators, especially NO. To our knowledge, this is the first report describing an anti-mycobacterial effect of L. dendroidea extract and demonstrating the association of this activity with obtusol (2). Conclusion: The described effects of active compounds from L. dendroidea are promising for the control of inflammation in infectious diseases and specifically, against mycobacterial infections associated with exacerbated inflammation. SUMMARY Inflammation is strongly involved in the pathogenesis of most infectious diseases, including TB. The treatment of TB is based on the use of anti mycobacterial drugs, however the most severe forms of TB, require additional anti inflammatory therapy to prevent excessive inflammation. A combination of these properties in one compound could provide additional therapeutic benefits. In this work, we studied L. dendroidea extracts and purified compounds and demonstrated that the LDA extract and (-)-elatol (1) were potent in inhibiting NO production by macrophages through the specific inhibition of iNOS expression. The LDA and LDM extracts and obtusol (2) were active against virulent strain of M. tuberculosis. This is the first report demonstrating that the anti-inflammatory activities of L. dendroidea were associated with the presence of (-)-elatol (1), whereas anti-mycobacterial activities of L. dendroidea extracts were associated with obtusol (2).
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Affiliation(s)
- Thatiana Lopes Biá Ventura
- Laboratory of Biology of Recognition, Center of Bioscience and Biotechnology, Darcy Ribeiro University of Northern Fluminense, Campos dos Goytacazes-RJ, Brazil; Laboratory of Bioactive Products, School of Pharmacy, Federal University of Rio de Janeiro, Macaé/ IMMT-RJ, Brazil
| | - Fernanda Lacerda da Silva Machado
- Department of Organic Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Group of Natural Products from Aquatic Organisms, Center for Ecology and Socio-Environmental Development, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marlon Heggdorne de Araujo
- Laboratory of Biology of Recognition, Center of Bioscience and Biotechnology, Darcy Ribeiro University of Northern Fluminense, Campos dos Goytacazes-RJ, Brazil; Laboratory of Bioactive Products, School of Pharmacy, Federal University of Rio de Janeiro, Macaé/ IMMT-RJ, Brazil
| | - Lísia Mônica de Souza Gestinari
- Group of Natural Products from Aquatic Organisms, Center for Ecology and Socio-Environmental Development, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carlos Roland Kaiser
- Department of Organic Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Francisco de Assis Esteves
- Group of Natural Products from Aquatic Organisms, Center for Ecology and Socio-Environmental Development, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Elena B Lasunskaia
- Laboratory of Biology of Recognition, Center of Bioscience and Biotechnology, Darcy Ribeiro University of Northern Fluminense, Campos dos Goytacazes-RJ, Brazil
| | - Angélica Ribeiro Soares
- Department of Organic Chemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Group of Natural Products from Aquatic Organisms, Center for Ecology and Socio-Environmental Development, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Michelle Frazão Muzitano
- Laboratory of Bioactive Products, School of Pharmacy, Federal University of Rio de Janeiro, Macaé/ IMMT-RJ, Brazil
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Massimba-Dibama H, Mourer M, Constant P, Daffé M, Regnouf-de-Vains JB. Guanidinium compounds with sub-micromolar activities against Mycobacterium tuberculosis . Synthesis, characterization and biological evaluations. Bioorg Med Chem 2015; 23:5410-8. [DOI: 10.1016/j.bmc.2015.07.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/17/2015] [Accepted: 07/25/2015] [Indexed: 10/23/2022]
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Coelho T, Machado D, Couto I, Maschmann R, Ramos D, von Groll A, Rossetti ML, Silva PA, Viveiros M. Enhancement of antibiotic activity by efflux inhibitors against multidrug resistant Mycobacterium tuberculosis clinical isolates from Brazil. Front Microbiol 2015; 6:330. [PMID: 25972842 PMCID: PMC4412083 DOI: 10.3389/fmicb.2015.00330] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/01/2015] [Indexed: 11/25/2022] Open
Abstract
Drug resistant tuberculosis continues to increase and new approaches for its treatment are necessary. The identification of M. tuberculosis clinical isolates presenting efflux as part of their resistant phenotype has a major impact in tuberculosis treatment. In this work, we used a checkerboard procedure combined with the tetrazolium microplate-based assay (TEMA) to study single combinations between antituberculosis drugs and efflux inhibitors (EIs) against multidrug resistant M. tuberculosis clinical isolates using the fully susceptible strain H37Rv as reference. Efflux activity was studied on a real-time basis by a fluorometric method that uses ethidium bromide as efflux substrate. Quantification of efflux pump genes mRNA transcriptional levels were performed by RT-qPCR. The fractional inhibitory concentrations (FIC) indicated synergistic activity for the interactions between isoniazid, rifampicin, amikacin, ofloxacin, and ethidium bromide plus the EIs verapamil, thioridazine and chlorpromazine. The FICs ranged from 0.25, indicating a four-fold reduction on the MICs, to 0.015, 64-fold reduction. The detection of active efflux by real-time fluorometry showed that all strains presented intrinsic efflux activity that contributes to the overall resistance which can be inhibited in the presence of the EIs. The quantification of the mRNA levels of the most important efflux pump genes on these strains shows that they are intrinsically predisposed to expel toxic compounds as the exposure to subinhibitory concentrations of antibiotics were not necessary to increase the pump mRNA levels when compared with the non-exposed counterpart. The results obtained in this study confirm that the intrinsic efflux activity contributes to the overall resistance in multidrug resistant clinical isolates of M. tuberculosis and that the inhibition of efflux pumps by the EIs can enhance the clinical effect of antibiotics that are their substrates.
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Affiliation(s)
- Tatiane Coelho
- Fundação Estadual de Produção e Pesquisa em Saúde, Centro de Desenvolvimento Científico e Tecnológico Porto Alegre, Brazil ; Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Diana Machado
- Grupo de Micobactérias, Unidade de Microbiologia Médica, Global Health and Tropical Medicine, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa Lisboa, Portugal
| | - Isabel Couto
- Grupo de Micobactérias, Unidade de Microbiologia Médica, Global Health and Tropical Medicine, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa Lisboa, Portugal
| | - Raquel Maschmann
- Fundação Estadual de Produção e Pesquisa em Saúde, Centro de Desenvolvimento Científico e Tecnológico Porto Alegre, Brazil ; Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Daniela Ramos
- Faculdade de Medicina, Núcleo de Pesquisa em Microbiologia Médica, Universidade Federal do Rio Grande Rio Grande, Brazil
| | - Andrea von Groll
- Faculdade de Medicina, Núcleo de Pesquisa em Microbiologia Médica, Universidade Federal do Rio Grande Rio Grande, Brazil
| | - Maria L Rossetti
- Fundação Estadual de Produção e Pesquisa em Saúde, Centro de Desenvolvimento Científico e Tecnológico Porto Alegre, Brazil ; Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul Porto Alegre, Brazil
| | - Pedro A Silva
- Faculdade de Medicina, Núcleo de Pesquisa em Microbiologia Médica, Universidade Federal do Rio Grande Rio Grande, Brazil
| | - Miguel Viveiros
- Grupo de Micobactérias, Unidade de Microbiologia Médica, Global Health and Tropical Medicine, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa Lisboa, Portugal
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Antimycobacterial and nitric oxide production inhibitory activities of Ocotea notata from Brazilian restinga. ScientificWorldJournal 2015; 2015:947248. [PMID: 25789338 PMCID: PMC4350868 DOI: 10.1155/2015/947248] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/13/2014] [Accepted: 10/01/2014] [Indexed: 11/18/2022] Open
Abstract
The genus Ocotea (Lauraceae) is distributed mainly in tropical and subtropical regions. Some species of this genus as O. puberula and O. quixos have been described in the literature, showing antibacterial activity. And Ocotea macrophylla showed anti-inflammatory activity with inhibition of COX-1, COX-2, and LOX-5. The purpose of this study was the phytochemical investigation of the plant species Ocotea notata from Restinga Jurubatiba National Park, Macaé, RJ, Brazil, and the search for antimycobacterial fractions and compounds. The crude extract was evaluated for antimycobacterial activity and presented 95.75 ± 2.53% of growth inhibition at 100 µg/mL. Then, it was subjected to a liquid-liquid partition and subsequently was chemically investigated by HPLC, revealing the major presence of flavonoids. In this process the partition fractions hexane, ethyl acetate, and butanol are shown to be promising in the antimycobacterial assay. In addition, ethyl acetate fraction was chromatographed and afforded two flavonoids identified by MS and NMR as afzelin and isoquercitrin. The isolated flavonoids afzelin and isoquercitrin were evaluated for their antimycobacterial activity and for their ability to inhibit NO production by macrophages stimulated by LPS; both flavonoids isoquercitrin (Acet22) and afzelin (Acet32) were able to inhibit the production of NO by macrophages. The calculated IC50 of Acet22 and Acet32 was 1.03 and 0.85 µg/mL, respectively.
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Bernardes NR, Heggdorne-Araújo M, Borges IF, Almeida FM, Amaral EP, Lasunskaia EB, Muzitano MF, Oliveira DB. Nitric oxide production, inhibitory, antioxidant and antimycobacterial activities of the fruits extract and flavonoid content of Schinus terebinthifolius. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2014. [DOI: 10.1016/j.bjp.2014.10.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Sesquiterpenes from the Brazilian red alga Laurencia dendroidea J. Agardh. Molecules 2014; 19:3181-92. [PMID: 24642907 PMCID: PMC6271906 DOI: 10.3390/molecules19033181] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/03/2014] [Accepted: 03/05/2014] [Indexed: 11/17/2022] Open
Abstract
Two new chamigrane sesquiterpenes 1–2 and three known compounds 3–5 were isolated from a lipophilic extract of the red alga Laurencia dendroidea collected from the Southeastern Brazilian coast. Dendroidone (1) and dendroidiol (2) were isolated from samples collected at Biscaia Inlet, Angra dos Reis, Rio de Janeiro and at Manguinhos Beach, Serra, Espírito Santo, respectively. Debromoelatol (3), obtusane (4) and (1S*,2S*,3S*,5S*,8S*,9S*)-2,3,5,9-tetramethyltricyclo[6.3.0.01.5]undecan-2-ol (5) were obtained from specimens collected at Vermelha Beach, Parati, Rio de Janeiro. The structures of new compounds were elucidated by extensive NMR (1H-, 13C-, COSY, HSQC, HMBC and NOESY) and high resolution mass spectrometry analysis. Additionally, the absolute configuration of compound 2 was assigned by X-ray analysis. Full spectroscopic data is described for the first time for compound 3. Anti-inflammatory and antimycobacterial activities of compounds 2–5 were evaluated. Compounds 3–5 inhibited the release of inflammatory mediator NO while TNF-α levels were only affected by 3. All compounds tested displayed moderate antimycobacterial action.
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Matviiuk T, Mori G, Lherbet C, Rodriguez F, Pasca MR, Gorichko M, Guidetti B, Voitenko Z, Baltas M. Synthesis of 3-heteryl substituted pyrrolidine-2,5-diones via catalytic Michael reaction and evaluation of their inhibitory activity against InhA and Mycobacterium tuberculosis. Eur J Med Chem 2014; 71:46-52. [DOI: 10.1016/j.ejmech.2013.10.069] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 10/16/2013] [Accepted: 10/28/2013] [Indexed: 10/26/2022]
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Peñuelas-Urquides K, Villarreal-Treviño L, Silva-Ramírez B, Rivadeneyra-Espinoza L, Said-Fernández S, de León MB. Measuring of Mycobacterium tuberculosis growth. A correlation of the optical measurements with colony forming units. Braz J Microbiol 2013; 44:287-9. [PMID: 24159318 PMCID: PMC3804212 DOI: 10.1590/s1517-83822013000100042] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 07/02/2012] [Indexed: 11/25/2022] Open
Abstract
The quantification of colony forming units (cfu), turbidity, and optical density at 600 nm (OD600) measurements were used to evaluate Mycobacterium tuberculosis growth. Turbidity and OD600 measurements displayed similar growth curves, while cfu quantification showed a continuous growth curve. We determined the cfu equivalents to McFarland and OD600 units.
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Affiliation(s)
- Katia Peñuelas-Urquides
- Laboratorio de Biología Molecular, Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, México. ; Posgrado en Microbiología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, NL, México
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Anthelmintic avermectins kill Mycobacterium tuberculosis, including multidrug-resistant clinical strains. Antimicrob Agents Chemother 2012; 57:1040-6. [PMID: 23165468 DOI: 10.1128/aac.01696-12] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Avermectins are a family of macrolides known for their anthelmintic activities and traditionally believed to be inactive against all bacteria. Here we report that members of the family, ivermectin, selamectin, and moxidectin, are bactericidal against mycobacterial species, including multidrug-resistant and extensively drug-resistant clinical strains of Mycobacterium tuberculosis. Avermectins are approved for clinical and veterinary uses and have documented pharmacokinetic and safety profiles. We suggest that avermectins could be repurposed for tuberculosis treatment.
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Antibacterial, antifungal and antileishmanial activities of indolone-N-oxide derivatives. J Antibiot (Tokyo) 2012; 65:499-504. [PMID: 22828966 DOI: 10.1038/ja.2012.60] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An alarming increase in microbial resistance to traditional drugs and classical pharmacophores has spurred the search for new antimicrobial compounds. Indolone-N-oxides (INODs) possess a redox pharmacophore with promising, recently established, antimalarial activities. In this study, the anti-infectious properties of a series of INODs were investigated. The antibacterial activity was evaluated against five bacterial strains Gram-positive (Staphylococcus aureus, Enterococcus hirae), Gram-negative (Pseudomonas aeruginosa, Escherichia coli) and acid-fast (Mycobacterium tuberculosis). The antifungal activity was assessed using two fungal strains (Aspergillus niger, Candida albicans). The antileishmanial activity was tested against two leishmanial strains, axenically-cultured amastigote (Leishmania infantum, Leishmania amazonensis). The pharmacological activities are discussed as a function of structural and lipophilic characteristics. The Gram-positive bacterial strain E. hirae was found to be the most sensitive strain, whereas the Gram-negative E. coli was resistant to this family of compounds. One compound (64) was more potent than nalidixic acid against E. hirae, whereas another one (52) was equipotent as clotrimazole against C. albicans. INODs were microbe -cidal rather than -static. INODs showed good antitubercular activity in the low micromolar range (similar to ciprofloxacin). In addition, INOD-antiprotozoal potencies were confirmed against the leishmania parasite. INODs showed a broad spectrum of antimicrobial activity and offer a promising anti-infectious prototype worthy of being developed.
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Kaikabo AA, Eloff JN. Antibacterial activity of two biflavonoids from Garcinia livingstonei leaves against Mycobacterium smegmatis. JOURNAL OF ETHNOPHARMACOLOGY 2011; 138:253-255. [PMID: 21920421 DOI: 10.1016/j.jep.2011.08.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 07/06/2011] [Accepted: 08/12/2011] [Indexed: 05/31/2023]
Abstract
Amentoflavone and 4' monomethoxy amentoflavone were previously isolated from Garcinia livingstonei leaves. These compounds had good activities (MIC 6 and 8 μg/ml) against some nosocomial bacteria. In this study, the activity of these purified compounds were tested against fast-growing non-pathogenic Mycobacterium smegmatis. Amentoflavone was the most active compound, with an MIC of 0.60 ± 0.70 mg/ml. The MIC of 4' monomethoxy amentoflavone and the positive control isoniazid against Mycobacterium smegmatis were similar 1.40 ± 1.56 and 1.30 ± 1.70 mg/ml respectively. Although, Mycobacterium smegmatis is a non-pathogenic fast growing mycobacterium the activities of these compounds may also be useful in combating infections by pathogenic Mycobacterium spp.
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Affiliation(s)
- A A Kaikabo
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa.
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Camacho J, Barazarte A, Gamboa N, Rodrigues J, Rojas R, Vaisberg A, Gilman R, Charris J. Synthesis and biological evaluation of benzimidazole-5-carbohydrazide derivatives as antimalarial, cytotoxic and antitubercular agents. Bioorg Med Chem 2011; 19:2023-9. [DOI: 10.1016/j.bmc.2011.01.050] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 01/20/2011] [Accepted: 01/24/2011] [Indexed: 10/18/2022]
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De P, Koumba Yoya G, Constant P, Bedos-Belval F, Duran H, Saffon N, Daffé M, Baltas M. Design, Synthesis, and Biological Evaluation of New Cinnamic Derivatives as Antituberculosis Agents. J Med Chem 2011; 54:1449-61. [DOI: 10.1021/jm101510d] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Prithwiraj De
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, LSPCMIB (Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique), 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Georges Koumba Yoya
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, LSPCMIB (Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique), 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Patricia Constant
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, IPBS, (Institut de Pharmacologie et Biologie Structurale), Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 route de Narbonne, F-31077 Toulouse Cedex 04, France
| | - Florence Bedos-Belval
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, LSPCMIB (Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique), 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Hubert Duran
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, LSPCMIB (Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique), 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Nathalie Saffon
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- Structure Fédérative Toulousaine en Chimie Moléculaire, FR 2599, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Mamadou Daffé
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, IPBS, (Institut de Pharmacologie et Biologie Structurale), Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 route de Narbonne, F-31077 Toulouse Cedex 04, France
| | - Michel Baltas
- Université de Toulouse, UPS, 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
- CNRS, LSPCMIB (Laboratoire de Synthèse et Physico-Chimie de Molécules d’Intérêt Biologique), 118, Route de Narbonne, F-31062 Toulouse Cedex 9, France
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Zhao T, Liu Y. N-acetylcysteine inhibit biofilms produced by Pseudomonas aeruginosa. BMC Microbiol 2010; 10:140. [PMID: 20462423 PMCID: PMC2882372 DOI: 10.1186/1471-2180-10-140] [Citation(s) in RCA: 143] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 05/12/2010] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Pseudomonas aeruginosa is a common pathogen in chronic respiratory tract infections. It typically makes a biofilm, which makes treatment of these infections difficult. In this study, we investigated the inhibitory effects of N-acetylcysteine (NAC) on biofilms produced by P. aeruginosa. RESULTS We found that minimum inhibitory concentrations (MICs) of NAC for most isolates of P. aeruginosa were 10 to 40 mg/ml, the combination of NAC and ciprofloxacin (CIP) demonstrated either synergy (50%) or no interaction (50%) against the P. aeruginosa strains. NAC at 0.5 mg/ml could detach mature P. aeruginosa biofilms. Disruption was proportional to NAC concentrations, and biofilms were completely disrupted at 10 mg/ml NAC. Analysis using COMSTAT software also showed that PAO1 biofilm biomass decreased and its heterogeneity increased as NAC concentration increased. NAC and ciprofloxacin showed significant killing of P. aeruginosa in biofilms at 2.5 mg/ml and > 2 MIC, respectively (p < 0.01). NAC-ciprofloxacin combinations consistently decreased viable biofilm-associated bacteria relative to the control; this combination was synergistic at NAC of 0.5 mg/ml and CIP at 1/2MIC (p < 0.01). Extracellular polysaccharides (EPS) production by P. aeruginosa also decreased by 27.64% and 44.59% at NAC concentrations of 0.5 mg/ml and 1 mg/ml. CONCLUSIONS NAC has anti-bacterial properties against P. aeruginosa and may detach P. aeruginosa biofilms. Use of NAC may be a new strategy for the treatment of biofilm-associated chronic respiratory infections due to P. aeruginosa, although it would be appropriate to conduct clinical studies to confirm this.
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Affiliation(s)
- Tiemei Zhao
- Department of Respiratory diseases, Chinese PLA General Hospital, Beijing, China
| | - Youning Liu
- Department of Respiratory diseases, Chinese PLA General Hospital, Beijing, China
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High efficacy of clofazimine and its synergistic effect with amikacin against rapidly growing mycobacteria. Int J Antimicrob Agents 2010; 35:400-4. [PMID: 20138481 DOI: 10.1016/j.ijantimicag.2009.12.008] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2009] [Revised: 12/07/2009] [Accepted: 12/08/2009] [Indexed: 11/22/2022]
Abstract
The aim of this study was to determine whether clofazimine, dapsone and cycloserine may be suitable antimicrobial agents for the treatment of infections due to rapidly growing mycobacteria (RGM). The antimicrobial activity of the three drugs against 117 Mycobacterium abscessus isolates, 48 Mycobacterium fortuitum isolates and 20 Mycobacterium chelonae isolates was evaluated based on their broth microdilution minimal inhibitory concentrations (MICs) against the isolates. Clofazimine was highly efficacious against these RGM. The vast majority of M. abscessus, M. fortuitum and M. chelonae isolates (99.1%, 91.7% and 100%, respectively) had clofazimine MICs of <or=1mg/L. MIC(50) values (MIC for 50% of the organisms) of clofazimine against the isolates ranged from 0.25mg/L to 0.5mg/L and MIC(90) values (MIC for 90% of the organisms) ranged from 0.5mg/L to 1.0mg/L. Cycloserine and dapsone had little or no activity against the isolates. The effects of combined application of clofazimine and amikacin on 40 M. abscessus isolates, 48 M. fortuitum isolates and 20 M. chelonae isolates were evaluated. Addition of 0.25x MIC of amikacin for the isolates to clofazimine reduced clofazimine MICs in all of the M. abscessus and M. chelonae isolates and in 48% of the M. fortuitum isolates tested. Clofazimine, either alone or combined with amikacin, may serve as a promising drug for the treatment of RGM infections.
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Vaubourgeix J, Bardou F, Boissier F, Julien S, Constant P, Ploux O, Daffé M, Quémard A, Mourey L. S-adenosyl-N-decyl-aminoethyl, a potent bisubstrate inhibitor of mycobacterium tuberculosis mycolic acid methyltransferases. J Biol Chem 2009; 284:19321-30. [PMID: 19439410 PMCID: PMC2740557 DOI: 10.1074/jbc.m809599200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 03/26/2009] [Indexed: 11/06/2022] Open
Abstract
S-Adenosylmethionine-dependent methyltransferases (AdoMet-MTs) constitute a large family of enzymes specifically transferring a methyl group to a range of biologically active molecules. Mycobacterium tuberculosis produces a set of paralogous AdoMet-MTs responsible for introducing key chemical modifications at defined positions of mycolic acids, which are essential and specific components of the mycobacterial cell envelope. We investigated the inhibition of these mycolic acid methyltransferases (MA-MTs) by structural analogs of the AdoMet cofactor. We found that S-adenosyl-N-decyl-aminoethyl, a molecule in which the amino acid moiety of AdoMet is substituted by a lipid chain, inhibited MA-MTs from Mycobacterium smegmatis and M. tuberculosis strains, both in vitro and in vivo, with IC(50) values in the submicromolar range. By contrast, S-adenosylhomocysteine, the demethylated reaction product, and sinefungin, a general AdoMet-MT inhibitor, did not inhibit MA-MTs. The interaction between Hma (MmaA4), which is strictly required for the biosynthesis of oxygenated mycolic acids in M. tuberculosis, and the three cofactor analogs was investigated by x-ray crystallography. The high resolution crystal structures obtained illustrate the bisubstrate nature of S-adenosyl-N-decyl-aminoethyl and provide insight into its mode of action in the inhibition of MA-MTs. This study has potential implications for the design of new drugs effective against multidrug-resistant and persistent tubercle bacilli.
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Affiliation(s)
- Julien Vaubourgeix
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Fabienne Bardou
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Fanny Boissier
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Sylviane Julien
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Patricia Constant
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Olivier Ploux
- the Laboratoire de Biochimie des Micro-organismes: Enzymologie, Métabolisme, et Antibiotiques, Ecole Nationale Supérieure de Chimie de Paris, CNRS UMR 7573, F-75231 Paris, France
| | - Mamadou Daffé
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Annaïk Quémard
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
| | - Lionel Mourey
- From CNRS, Institut de Pharmacologie et de Biologie Structurale, Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 Route de Narbonne, F-31077 Toulouse
- the Université de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale, F-31077 Toulouse, and
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Park YK, Koh WJ, Kim SO, Shin S, Kim BJ, Cho SN, Lee SM, Chang CL. Clarithromycin susceptibility testing of Mycobacterium avium complex using 2,3-diphenyl-5-thienyl-(2)-tetrazolium chloride microplate assay with Middlebrook 7H9 broth. J Korean Med Sci 2009; 24:511-2. [PMID: 19543518 PMCID: PMC2698201 DOI: 10.3346/jkms.2009.24.3.511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Accepted: 07/17/2008] [Indexed: 11/20/2022] Open
Abstract
A series of 119 Mycobacterium avium complex isolates were subjected to clarithromycin susceptibility testing using microplates containing 2,3-diphenyl-5-thienyl-(2)-tetrazolium chloride (STC). Among 119 isolates, 114 (95.8%) were susceptible to clarithromycin and 5 were resistant according to the new and the standard method. STC counts the low cost and reduces the number of procedures needed for susceptibility testing.
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Affiliation(s)
| | - Won-Jung Koh
- Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea
| | - Shin Ok Kim
- Korean Institute of Tuberculosis, Seoul, Korea
| | - Sonya Shin
- Division of Social Medicine and Health Inequalities, Brigham and Women's Hospital, Boston, MA, USA
| | - Bum Joon Kim
- Seoul National University Hospital, Seoul, Korea
| | - Sang-Nae Cho
- Yonsei University College of Medicine, Seoul, Korea
| | - Sun Min Lee
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Chulhun L. Chang
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
- Medical Research Institute, Pusan National University, Busan, Korea
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Yoya GK, Bedos-Belval F, Constant P, Duran H, Daffé M, Baltas M. Synthesis and evaluation of a novel series of pseudo-cinnamic derivatives as antituberculosis agents. Bioorg Med Chem Lett 2009; 19:341-3. [DOI: 10.1016/j.bmcl.2008.11.082] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2008] [Revised: 11/19/2008] [Accepted: 11/21/2008] [Indexed: 11/25/2022]
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Watanabe G, Behrns KE, Kim JS, Kim RD. Heat shock protein 90 inhibition abrogates hepatocellular cancer growth through cdc2-mediated G2/M cell cycle arrest and apoptosis. Cancer Chemother Pharmacol 2008; 64:433-43. [PMID: 19082595 DOI: 10.1007/s00280-008-0888-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2008] [Revised: 11/14/2008] [Accepted: 11/22/2008] [Indexed: 12/19/2022]
Abstract
PURPOSE 17-(demethoxy), 17-allylamino geldanamycin (17-AAG) suppresses growth in some cancers by inhibiting Heat shock protein 90 (Hsp90). We examined the effects of 17-AAG-mediated Hsp90 inhibition on human hepatocellular carcinoma (HCC) growth in vitro and in vivo. METHODS Human HCC cell lines, Hep3B and HuH7, were exposed to 17-AAG and cell viabilities and apoptosis were determined. Cell cycle profiles were analyzed and the G(2)/M cell cycle checkpoint proteins cdc2 and cyclin B1 were examined. Studies were performed to determine whether 17-AAG-mediated cdc2 decrease was due to altered gene expression, transcription, or protein degradation. The effects of 17-AAG on Hep3B and HuH7 xenograft growth in athymic nude mice were also examined. RESULTS Hep3B and HuH7 treated with 17-AAG versus untreated controls showed decreased cell viability and increased apoptosis. Cells treated with 17-AAG also showed an increased fraction in G(2)/M phase and an associated decrease in cdc2 through protein degradation rather than through other mechanisms. Hsp90 inhibition by 17-AAG also decreased HCC xenograft growth in association with decreased cdc2 expression. CONCLUSIONS 17-AAG-mediated inhibition of Hsp90 abrogates human HCC cell growth in vitro and in vivo through cdc2 decrease, which in turn induces G(2)/M cell cycle arrest and apoptosis. Hsp90 is a mediator of HCC growth and survival and its inhibition may serve as a potential treatment.
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Affiliation(s)
- Go Watanabe
- Department of Surgery, University of Florida College of Medicine, Gainesville, FL 32610, USA
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McGaw LJ, Lall N, Hlokwe TM, Michel AL, Meyer JJM, Eloff JN. Purified compounds and extracts from Euclea species with antimycobacterial activity against Mycobacterium bovis and fast-growing mycobacteria. Biol Pharm Bull 2008; 31:1429-33. [PMID: 18591787 DOI: 10.1248/bpb.31.1429] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Naphthoquinones and other compounds with antimycobacterial activity against Mycobacterium tuberculosis have previously been isolated from Euclea species. In this study, several constituents of Euclea natalensis and E. undulata, as well as organic extracts of the leaves, were assessed for efficacy against the zoonotic pathogen, Mycobacterium bovis. Also included in the battery of test organisms were M. bovis BCG and the fast-growing species M. smegmatis and M. fortuitum. The acetone extract of E. natalensis had potent activity against M. bovis (MIC=26 microg/ml). The naphthoquinone 7-methyljuglone was the most active compound, with an MIC as low as 1.55 microg/ml against pathogenic M. bovis. M. bovis BCG was not as susceptible to the test compounds as the pathogenic strain, but similar patterns of activity were observed between all the strains tested. M. smegmatis appeared to be a better predictor of antimycobacterial activity against pathogenic M. bovis (and M. tuberculosis), while MIC values obtained using M. fortuitum correlated well with those of M. bovis BCG.
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Affiliation(s)
- Lyndy Joy McGaw
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.
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Raut U, Narang P, Mendiratta DK, Narang R, Deotale V. EVALUATION OF RAPID MTT TUBE METHOD FOR DETECTION OF DRUG SUSCEPTIBILITY OF MYCOBACTERIUM TUBERCULOSIS TO RIFAMPICIN AND ISONIAZID. Indian J Med Microbiol 2008. [DOI: 10.1016/s0255-0857(21)01866-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Castro-Garza J, Barrios-García HB, Cruz-Vega DE, Said-Fernández S, Carranza-Rosales P, Molina-Torres CA, Vera-Cabrera L. Use of a colorimetric assay to measure differences in cytotoxicity of Mycobacterium tuberculosis strains. J Med Microbiol 2007; 56:733-737. [PMID: 17510256 DOI: 10.1099/jmm.0.46915-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Several techniques have been used to quantify the cytotoxicity produced by Mycobacterium tuberculosis bacilli on cell monolayers; however, they are semi-quantitative or time consuming. Herein, a method based on crystal violet (CV) uptake by THP-1 cell monolayers is described. This colorimetric method quantifies the cytotoxic effect as a function of the number of remaining cells after the infection with M. tuberculosis. Since this micro-organism is not stained by the dye, it does not produce a background that affects absorbance readings. As determined by CV assay (CVA), M. tuberculosis strain H37Rv destroyed 10.5 % of THP-1 cell monolayers at 24 h and 50.52 % at 72 h, while M. tuberculosis strains lacking the complete phospholipase C locus produced a reduced cytotoxic effect. The damage estimated by microscopy corresponded to the effect quantified by CVA. The results show that the use of CVA is a rapid, sensitive and reliable quantitative assay to measure the cytotoxicity of different M. tuberculosis strains.
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Affiliation(s)
- Jorge Castro-Garza
- División de Biología Celular y Molecular, Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, Mexico
| | - Hugo B Barrios-García
- Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, NL, Mexico
- División de Biología Celular y Molecular, Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, Mexico
| | - Delia Elva Cruz-Vega
- División de Biología Celular y Molecular, Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, Mexico
| | - Salvador Said-Fernández
- División de Biología Celular y Molecular, Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, Mexico
| | - Pilar Carranza-Rosales
- División de Biología Celular y Molecular, Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, NL, Mexico
| | - Carmen A Molina-Torres
- Servicio de Dermatología, Hospital Universitario 'José E. González', Monterrey, NL, Mexico
| | - Lucio Vera-Cabrera
- Servicio de Dermatología, Hospital Universitario 'José E. González', Monterrey, NL, Mexico
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Rojas R, Caviedes L, Aponte JC, Vaisberg AJ, Lewis WH, Lamas G, Sarasara C, Gilman RH, Hammond GB. Aegicerin, the first oleanane triterpene with wide-ranging antimycobacterial activity, isolated from Clavija procera. JOURNAL OF NATURAL PRODUCTS 2006; 69:845-6. [PMID: 16724857 PMCID: PMC5507661 DOI: 10.1021/np050554l] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
An ethanol extract of the Peruvian plant Clavija procera, a member of the rare Theophrastaceae family, was fractionated using a colorimetric bioassay-guided protocol against Mycobacterium tuberculosis (MTB), yielding the oleanane triterpenoid aegicerin (1) as the active constituent. Its MIC values ranged between 1.6 and 3.12 microg/mL against 37 different sensitive and resistant MTB strains (1 H37Rv, 21 susceptible clinical isolates, 2 INH-resistant clinical isolates, and 13 MDR clinical isolates).
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Affiliation(s)
- Rosario Rojas
- Departamento de Ciencias Farmacéuticas, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Luz Caviedes
- Departamento de Microbiología y Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia
| | - José C. Aponte
- Department of Chemistry, University of Louisville, Louisville, Kentucky, 40292
| | - Abraham J. Vaisberg
- Departamento de Microbiología y Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia
| | - Walter H. Lewis
- Department of Biology, Washington University, St. Louis MO 63130
| | - Gerardo Lamas
- Departamento de Entomología, Museo de Historia Natural Universidad Nacional Mayor de San Marcos, Lima, Perú
| | - César Sarasara
- Confederación de Nacionalidades Amazónicas del Perú (CONAP), Lima, Perú
| | - Robert H. Gilman
- Departamento de Microbiología y Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia
- Department of International Health, Johns Hopkins School of Public Health Baltimore, Maryland, 21205
| | - Gerald B. Hammond
- Department of Chemistry, University of Louisville, Louisville, Kentucky, 40292
- To whom correspondence should be addressed. Tel: (+1)502-852-5998. Fax: (+1)502-852-3899.
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40
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Pietila MP, Vohra PK, Sanyal B, Wengenack NL, Raghavakaimal S, Thomas CF. Cloning and characterization of CYP51 from Mycobacterium avium. Am J Respir Cell Mol Biol 2006; 35:236-42. [PMID: 16543605 PMCID: PMC2643258 DOI: 10.1165/rcmb.2005-0398oc] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Mycobacterium avium complex (MAC) causes chronic lung disease in immunocompetent people and disseminated infection in patients with AIDS. MAC is intrinsically resistant to many conventional antimycobacterial agents, it develops drug resistance rapidly to macrolide antibiotics, and patients with MAC infection experience frequent relapses or the inability to completely eradicate the infection with current treatment. Treatment regimens are prolonged and complicated by drug toxicity or intolerances. We sought to identify biochemical pathways in MAC that can serve as targets for novel antimycobacterial treatment. The cytochrome P450 enzyme, CYP51, catalyzes an essential early step in sterol metabolism, removing a methyl group from lanosterol in animals and fungi, or from obtusifoliol in plants. Azoles inhibit CYP51 function, leading to an accumulation of methylated sterol precursors. This perturbation of normal sterol metabolism compromises cell membrane integrity, resulting in growth inhibition or cell death. We have cloned and characterized a CYP51 from MAC that functions as a lanosterol 14alpha-demethylase. We show the direct interactions of azoles with purified MAC-CYP51 by absorbance and electron paramagnetic resonance spectroscopy, and determine the minimum inhibitory concentrations (MICs) of econazole, ketoconazole, itraconazole, fluconazole, and voriconazole against MAC. Furthermore, we demonstrate that econazole has a MIC of 4 mug/ml and a minimum bacteriocidal concentration of 4 mug/ml, whereas ketoconazole has a MIC of 8 mug/ml and a minimum bacteriocidal concentration of 16 mug/ml. Itraconazole, voriconazole, and fluconazole did not inhibit MAC growth to any significant extent.
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Affiliation(s)
- Michael P Pietila
- Division of Pulmonary and Critical Care Medicine, Thoracic Diseases Research Unit, 826 Stabile Building, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
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41
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da Silva PA, Boffo MMS, de Mattos IG, Silva ABS, Palomino JC, Martin A, Takiff HE. Comparison of redox and D29 phage methods for detection of isoniazid and rifampicin resistance in Mycobacterium tuberculosis. Clin Microbiol Infect 2006; 12:293-6. [PMID: 16451420 DOI: 10.1111/j.1469-0691.2005.01355.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Rapid, accurate and inexpensive methods are essential to detect drug-resistant Mycobacterium tuberculosis and allow timely application of effective treatment and precautions to prevent transmission. The proportion method, the MTT and Alamar Blue redox methods, and the D29 mycobacteriophage assay, were compared for their ability to detect resistance to isoniazid and rifampicin. When tested against a panel of known M. tuberculosis strains, the redox methods and the D29 assay showed good sensitivity and specificity compared to the proportion method, suggesting that they could be useful alternatives for identifying multidrug resistance in M. tuberculosis.
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Affiliation(s)
- P A da Silva
- Pathology Department of Federal Foundation University of Rio Grande, Rio Grande do Sul, Brazil.
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42
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Ribeiro MO, Gomes MDS, Senna SG, Rossetti MLR, Fonseca LDS. Avaliação de testes rápidos em microplacas usando indicadores de viabilidade celular para determinação da susceptibilidade de cepas de Mycobacterium tuberculosis à isoniazida e rifampicina. J Bras Pneumol 2004. [DOI: 10.1590/s1806-37132004000400011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUÇÃO: As taxas de resistência aos fármacos constituem um dos pilares da avaliação dos programas de controle da tuberculose. A demora na obtenção dos resultados, conseqüência da metodologia convencional utilizada, faz com que haja a necessidade de avaliação de novos testes, mais rápidos e menos onerosos. OBJETIVO: Comparar técnicas fenotípicas rápidas para determinação do perfil de susceptibilidade de M. tuberculosis, utilizando indicadores de viabilidade celular, com o teste das proporções em Löwenstein-Jensen, padrão-ouro. MÉTODO: Foram utilizadas 166 cepas de M. tuberculosis com o perfil de susceptibilidade conhecido. A concentração mínima inibitória de cada fármaco foi determinada, em microplaca, utilizando-se meio líquido e os indicadores de oxi-redução, Alamar Blue® e brometo de tetrazolium. O ponto de corte entre a cepa sensível e a resistente foi estabelecido como concentração mínima inibitória maior ou igual a 0,2 mg /mL para isoniazida e 1,0 mg /mL para rifampicina. RESULTADOS: Houve concordância total entre os dois métodos de determinação da concentração mínima inibitória. Comparando os resultados dos testes com o padrão-ouro, obteve-se uma concordância de 95%, para isoniazida e rifampicina. O tempo para obtenção dos resultados foi de 7 dias, contrastando com os 28 dias pelo método convencional. CONCLUSÃO: Os testes para determinação da concentração mínima inibitória, em meio líquido, utilizando indicadores de oxi-redução, são rápidos e podem se utilizados como alternativa rápida na determinação de susceptibilidade de cepas de M. tuberculosis.
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43
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Vanitha JD, Paramasivan CN. Evaluation of microplate Alamar blue assay for drug susceptibility testing of Mycobacterium avium complex isolates. Diagn Microbiol Infect Dis 2004; 49:179-82. [PMID: 15246507 DOI: 10.1016/j.diagmicrobio.2004.04.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2003] [Accepted: 04/01/2004] [Indexed: 10/26/2022]
Abstract
Fifty-one clinical isolates and 5 clarithromycin-resistant mutants of Mycobacterium avium complex (MAC) were tested for their susceptibility to clarithromycin by microplate Alamar blue assay (MABA). The susceptibility results were compared with the results obtained by the BACTEC 460 method. All clinical isolates were susceptible, while all mutants were resistant to clarithromycin by BACTEC. Eighty-six percent of the clinical isolates were susceptible by MABA, and one of the resistant mutants was misclassified as susceptible by this method. The overall agreement between MABA and BACTEC was 86%, indicating the usefulness of MABA in drug susceptibility testing of MAC.
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44
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De Logu A, Pellerano ML, Sanna A, Pusceddu MC, Uda P, Saddi B. Comparison of the susceptibility testing of clinical isolates of Mycobacterium tuberculosis by the XTT colorimetric method and the NCCLS standards method. Int J Antimicrob Agents 2003; 21:244-50. [PMID: 12636986 DOI: 10.1016/s0924-8579(02)00350-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The susceptibility or resistance of clinical isolates of Mycobacterium tuberculosis were determined by a method incorporating the 2,3-bis(2-methoxy-4-nitro-5-sulphophenyl)-2H-tetrazolium-5-carboxanilide (XTT) and compared with results obtained by the National Committee for Clinical Laboratory Standards approved standard method (M24-T2). One hundred percent of all isolates demonstrated agreement between the susceptibility and resistance to isoniazid, rifampicin, and ethambutol obtained by the two methods, suggesting that the XTT-based method could provide a useful means for the rapid determination of antimycobacterial susceptibility of clinical isolates of M. tuberculosis.
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Affiliation(s)
- Alessandro De Logu
- Dipartimento di Scienze Chirurgiche e Trapianti d'Organo, Sezione di Microbiologia e Virologia, Università di Cagliari, Viale Frà Ignazio 38, 09123 Cagliari, Italy.
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45
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Luna-Herrera J, Martínez-Cabrera G, Parra-Maldonado R, Enciso-Moreno JA, Torres-López J, Quesada-Pascual F, Delgadillo-Polanco R, Franzblau SG. Use of receiver operating characteristic curves to assess the performance of a microdilution assay for determination of drug susceptibility of clinical isolates of Mycobacterium tuberculosis. Eur J Clin Microbiol Infect Dis 2003; 22:21-7. [PMID: 12582740 DOI: 10.1007/s10096-002-0855-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The aim of this study was to apply receiver operating characteristic (ROC) analysis to the microplate Alamar blue assay, a recently developed alternative for drug susceptibility testing of mycobacteria. As this is a quantitative assay, its performance can be determined by ROC analysis, in which the area under the ROC curve represents a summary of test performance (the higher the area, the better the test's performance). Sixty isolates of Mycobacterium tuberculosis were tested by the microcolorimetric assay against six twofold dilutions of streptomycin, isoniazid, rifampin, and ethambutol. For each isolate, the susceptibility pattern was simultaneously established by the agar proportion method, the result of which represented the gold standard value for the ROC analysis. The critical concentration, area under the curve, and P value for each drug were determined by ROC curve analysis. The results of the assay were obtained in an average of 8 days of incubation. The performance of the assay was excellent for all four drugs: the area under the curves was >0.97, the P values were 0.000, and sensitivity was 94%, specificity 97%, predictive value for resistance >/=92%, predictive value for susceptibility 97%, and test efficiency 97%. According to ROC analysis, the microplate Alamar blue assay is a reliable method for determination of drug-susceptibility. Rapidity and cost efficiency are two additional qualities that make this test an excellent alternative for the drug susceptibility testing of Mycobacterium tuberculosis. The ROC curve analysis is a robust statistical approach for evaluating the performance of new quantitative methods for determination of drug sensitivity of Mycobacterium tuberculosis isolates.
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Affiliation(s)
- J Luna-Herrera
- Departamento de Inmunología, Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Carpio y Plan de Ayala, Colonia Santo Tomás 11340, Mexico City, Mexico.
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46
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Palomino JC, Martin A, Camacho M, Guerra H, Swings J, Portaels F. Resazurin microtiter assay plate: simple and inexpensive method for detection of drug resistance in Mycobacterium tuberculosis. Antimicrob Agents Chemother 2002; 46:2720-2. [PMID: 12121966 PMCID: PMC127336 DOI: 10.1128/aac.46.8.2720-2722.2002] [Citation(s) in RCA: 809] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A method for detecting multidrug-resistant Mycobacterium tuberculosis by using a reduction of resazurin is described. Eighty clinical isolates were evaluated against isoniazid and rifampin; results at 7 days were compared with those of the proportion method. Specificity and sensitivity were excellent. The method is simple, inexpensive, and rapid and might be used with other antituberculosis drugs.
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Affiliation(s)
- Juan-Carlos Palomino
- Mycobacteriology Unit, Institute of Tropical Medicine, Nationalestraat 155, Antwerp 2000, Belgium.
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47
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Stentelaire C, Antoine N, Cabrol C, Feron G, Durand A. Development of a rapid and highly sensitive biochemical method for the measurement of fungal spore viability. An alternative to the CFU method. Enzyme Microb Technol 2001. [DOI: 10.1016/s0141-0229(01)00432-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Bedwell J, Kairo SK, Corbel MJ. Evaluation of a tetrazolium salt test to determine absence of live mycobacteria in tuberculin purified protein derivative. Biologicals 2001; 29:3-6. [PMID: 11482886 DOI: 10.1006/biol.2001.0267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Current methodology to determine absence of live mycobacteria in tuberculin purified protein derivative (PPD) takes up to 8 weeks to perform and may also involve testing on animals. In this paper we describe an in vitro test utilising the tetrazolium salt, 2,3-bis-(2-methoxy-4-nitro-5-sulphenyl)-(2H)-tetrazolium-5-carboxanilide (XTT) to monitor the absence of live Mycobacterium tuberculosis (Mtb) in PPD. In the presence of live cells XTT is converted to a coloured formazan product that can be measured spectrophotometrically. Live mycobacteria present in spiked PPD were detected by a marked change in optical density above background levels. This test is easy to perform and is complete in just 48 hr.
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Affiliation(s)
- J Bedwell
- Division of Bacteriology, National Institute for Biological Standards and Control, Blanche Lane, South Mimms, Potters Bar, Hertfordshire, EN6 3QG, UK
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49
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Pechkovsky DV, Zalutskaya OM, Ivanov GI, Misuno NI. Calprotectin (MRP8/14 protein complex) release during mycobacterial infection in vitro and in vivo. FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY 2000; 29:27-33. [PMID: 10967257 DOI: 10.1111/j.1574-695x.2000.tb01501.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The calprotectin (MRP8/14) protein complex belongs to the S100 family of Ca2+ binding proteins and is expressed during myelomonocytic differentiation. MRP8/14 plasma levels were determined by ELISA in 35 patients with active pulmonary tuberculosis (TB) showing mild (n = 12), moderate (n = 11) or severe (n = 12) disease, 13 patients with active pulmonary sarcoidosis (SR) and 21 healthy controls. TB patients had significantly increased plasma levels of MRP8/14 in comparison with SR and controls, which significantly depended on the volume of lung tissue involved in the inflammatory process. In TB patients, there was no correlation between plasma levels of MRP8/14 and total white blood cell (WBC) count, and blood polymorphonuclear neutrophil (PMN) count. In SR patients, MRP8/14 plasma levels were twofold higher in comparison with controls, but were lower compared with mild TB, and correlated with PMN and WBC counts. Human monocytes infected and cultured for 7 days with Mycobacterium bovis bacillus Calmette-Guérin showed fivefold higher MRP8/14 levels in supernatants compared with unstimulated or purified protein derivative-stimulated cells. Human MRP8/14 significantly increased Mycobacterium tuberculosis H37Rv growth in liquid medium in a dose- and time-dependent manner. These findings suggest that MRP8/14 plays an important role in the immunopathogenesis of tuberculosis.
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Affiliation(s)
- D V Pechkovsky
- Institute of Pulmonology and Phthisiology, Minsk, Belarus.
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50
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Abstract
Tuberculosis is a chronic infectious disease caused by several species of mycobacteria. Due to multi-drug resistant strains of mycobacteria and to a high prevalence of tuberculosis in patients who have acquired human immunodeficiency syndrome (AIDS), the number of patients infected with the disease is increasing worldwide. Thus there is an urgent need for new effective antimycobacterial agents to replace those currently in use. In this instance, the plant kingdom is undoubtedly a valuable source for new anti-tuberculosis agents. The present review article reports the findings from an extensive literature search of all plants that have been assessed for antimycobacterial/antitubercular activity over the past 20-30 years. An attempt has been made to summarize the information in order to highlight those promising plant species which are worthy of further investigation as leads for drug development. Over 350 plant species from a wide range of families and origins, containing various chemical classes of compounds, have been screened for such activity. A review of the relevant in vitro assays using different species of pathogenic and non-pathogenic mycobacteria is also included.
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Affiliation(s)
- S M Newton
- The School of Pharmacy, University of Bradford, West Yorkshire, UK
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