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Pinheiro LCS, Hoelz LVB, Ferreira MLG, Oliveira LG, Pereira RFA, do Valle AM, André LSP, Scaffo J, Pinheiro FR, Ribeiro TAN, Sachs D, Pascoal ACRF, Boechat N, Aguiar-Alves F. Synthesis of benzoylthiourea derivatives and analysis of their antibacterial performance against planktonic Staphylococcus aureus and its biofilms. Lett Appl Microbiol 2020; 71:645-651. [PMID: 32725897 DOI: 10.1111/lam.13359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 07/19/2020] [Accepted: 07/19/2020] [Indexed: 11/30/2022]
Abstract
Following the appearance of several antimicrobial agents to control the spread of infections, two major challenges have emerged: (i) the occurrence and blowout of multiresistant bacteria and the increase of chronic diseases and (ii) difficult-to-eradicate infections. In this study, we tested five benzoylthiourea derivatives for their ability to inhibit and stop bacterial growth and evaluated the possible influence of 1,2,4-triazolyl-benzoylthiourea derivative 4 on the formation and eradication of Staphylococcus aureus biofilms. Benzoylthiourea derivatives 4, 6, 10, 11 and 13 were obtained in one or two steps with low cost and subjected to tests to identify their minimum inhibitory concentration (MIC) and minimum bactericidal concentration. In vitro tests were also performed to assess their effects on biofilm formation and in preformed biofilms and scanning electron microscopy was used to visualize the effects on biofilm formation. The 1,2,4-triazolyl-benzoylthiourea derivative 4 showed bacteriostatic activity against the S. aureus HU25 clinical strain with an MIC of 16 µg ml-1 , which is below the toxic concentration (at 2500 µg ml-1 , 62·25% of the cells remained viable). Compound 4 also effectively prevented biofilm formation at the three subinhibitory concentrations tested (1/2 MIC, 1/4 MIC and 1/8 MIC) as confirmed by scanning electron microscopy. For breakdown of formed biofilms, the main influence was at a subinhibitory concentration (1/2 MIC). These findings make compound 4 a strong candidate for studies on the development of new antimicrobial and antibiofilm agents.
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Affiliation(s)
- L C S Pinheiro
- Drug Synthesis Department, Drug Technology Institute, Farmanguinhos - FIOCRUZ, Oswaldo Cruz Foundation, Manguinhos, RJ, Brazil
| | - L V B Hoelz
- Drug Synthesis Department, Drug Technology Institute, Farmanguinhos - FIOCRUZ, Oswaldo Cruz Foundation, Manguinhos, RJ, Brazil
| | - M L G Ferreira
- Drug Synthesis Department, Drug Technology Institute, Farmanguinhos - FIOCRUZ, Oswaldo Cruz Foundation, Manguinhos, RJ, Brazil
| | - L G Oliveira
- Drug Synthesis Department, Drug Technology Institute, Farmanguinhos - FIOCRUZ, Oswaldo Cruz Foundation, Manguinhos, RJ, Brazil
| | - R F A Pereira
- Laboratory of Molecular Epidemiology and Biotechnology/Rodolpho Albino University Laboratory, Fluminense Federal University, Niteroi, RJ, Brazil.,Postgraduate Program in Science and Biotechnology, Fluminense Federal University, Niteroi, RJ, Brazil
| | - A M do Valle
- Laboratory of Molecular Epidemiology and Biotechnology/Rodolpho Albino University Laboratory, Fluminense Federal University, Niteroi, RJ, Brazil
| | - L S P André
- Laboratory of Molecular Epidemiology and Biotechnology/Rodolpho Albino University Laboratory, Fluminense Federal University, Niteroi, RJ, Brazil.,Postgraduate Program in Pathology, Fluminense Federal University, Niteroi, RJ, Brazil
| | - J Scaffo
- Laboratory of Molecular Epidemiology and Biotechnology/Rodolpho Albino University Laboratory, Fluminense Federal University, Niteroi, RJ, Brazil
| | - F R Pinheiro
- Laboratory of Molecular Epidemiology and Biotechnology/Rodolpho Albino University Laboratory, Fluminense Federal University, Niteroi, RJ, Brazil.,Postgraduate Program in Applied Microbiology and Parasitology, Fluminense Federal University, Niterói, RJ, Brazil
| | - T A N Ribeiro
- Institute of Physics and Chemistry, Federal University of Itajubá, Itajubá, MG, Brazil
| | - D Sachs
- Institute of Physics and Chemistry, Federal University of Itajubá, Itajubá, MG, Brazil
| | - A C R F Pascoal
- Department of Basic Sciences, Nova Friburgo Health Institute, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - N Boechat
- Drug Synthesis Department, Drug Technology Institute, Farmanguinhos - FIOCRUZ, Oswaldo Cruz Foundation, Manguinhos, RJ, Brazil
| | - F Aguiar-Alves
- Laboratory of Molecular Epidemiology and Biotechnology/Rodolpho Albino University Laboratory, Fluminense Federal University, Niteroi, RJ, Brazil.,Postgraduate Program in Pathology, Fluminense Federal University, Niteroi, RJ, Brazil.,Postgraduate Program in Applied Microbiology and Parasitology, Fluminense Federal University, Niterói, RJ, Brazil
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Carvalho AS, Menna-Barreto RFS, Romeiro NC, de Castro SL, Boechat N. Design, synthesis and activity against Trypanosoma cruzi of azaheterocyclic analogs of megazol. Med Chem 2007; 3:460-5. [PMID: 17897071 DOI: 10.2174/157340607781745519] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study describes the design, synthesis and trypanocidal evaluation of new azaheterocyclic derivatives (4-8). These compounds were designed as megazol (1) analogs based on bioisosterism tools and were synthesized to investigate the possible pharmacophoric contribution of the 1,2,4-triazole nucleus, the position of the heterocyclic nucleus and presence of the nitro group, to the activity against the bloodstream trypomastigote forms of Trypanosoma cruzi. The most potent compound was 6, a nitro derivative obtained by substitution of a thiadiazole by a triazole ring and by moving the nitro group from C-5 position, as in 1, to the C-4 position. Finally, we have used semi-empirical theoretical calculations to discuss the correlation of some stereo electronic properties with biological activity in an attempt to understand the possible mechanism of action of the designed series of compounds.
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Affiliation(s)
- A S Carvalho
- Departamento de Síntese Orgânica, Farmanguinhos, Fundação Oswaldo Cruz, Rua Sizenando Nabuco 100, Rio de Janeiro, RJ, Brazil
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Flores-Batista VCS, Boechat N, Lago PM, Lazzarini LC, Pessanha LR, Almeida AS, Mafort TT, Kritski AL, Ho JL, Lapa-e-Silva JR. Low expression of antigen-presenting and costimulatory molecules by lung cells from tuberculosis patients. Braz J Med Biol Res 2007; 40:1671-9. [PMID: 17713660 DOI: 10.1590/s0100-879x2006005000141] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2006] [Accepted: 05/09/2007] [Indexed: 02/01/2023] Open
Abstract
Costimulatory and antigen-presenting molecules are essential to the initiation of T cell immunity to mycobacteria. The present study analyzed by immunocytochemistry, using monoclonal antibodies and alkaline phosphatase-anti-alkaline phosphatase method, the frequency of costimulatory (CD86, CD40, CD40L, CD28, and CD152) and antigen-presenting (MHC class II and CD1) molecules expression on human lung cells recovered by sputum induction from tuberculosis (TB) patients (N = 22) and non-TB controls (N = 17). TB cases showed a statistically significant lower percentage of HLA-DR+ cells than control subjects (21.9 +/- 4.2 vs 50.0 +/- 7.2%, P < 0.001), even though similar proportions of TB cases (18/22) and control subjects (16/17, P = 0.36) had HLA-DR-positive-stained cells. In addition, fewer TB cases (10/22) compared to control subjects (16/17) possessed CD86-expressing cells (P = 0.04; OR: 0.05; 95%CI = 0.00-0.51), and TB cases expressed a lower percentage of CD86+ cells (P = 0.04). Moreover, TB patients with clinically limited disease ( pound1 lobe) on chest X-ray exhibited a lower percentage of CD86-bearing cells compared to patients with more extensive lung disease (>1 lobe) (P = 0.02). The lower expression by lung cells from TB patients of HLA-DR and CD86, molecules involved in antigen presentation and activation of T cells, may minimize T cell recognition of Mycobacterium tuberculosis, fostering an immune dysfunctional state and active TB.
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Affiliation(s)
- V C S Flores-Batista
- Laboratório Multidisciplinar de Pesquisa, Instituto de Doenças do Tórax, Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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Boechat N, Carvalho AS, Fernandez-Ferreira E, Soares RO, Souza AS, Gibaldi D, Bozza M, Pinto AC. Novel nitroimidazoles with trypanocidal and cell growth inhibition activities. Cytobios 2002; 105:83-90. [PMID: 11393774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Chagas' disease, caused by the protozoan parasite Trypanosoma cruzi, affects 18 million people in Latin America and is an important cause of heart disease. Although transmission has been reduced, an effective therapy for the infected population is lacking. New nitroimidazoles were designed and synthesized aimed at the development of a trypanocidal drug. The coupling of nitroimidazoles with heterocyclic N-trifluoromethyltriazolyl and pyrazolyl groups, 5-[N-(3-(5-trifluoromethyl)-1H-1,2,4-triazolyl)]amino-1-methyl-4-nitroimidazole (compound 4) and 5-N-(1-pyrazolyl)-1-methyl-4-nitroimidazole (compound 5). The in vitro trypanocidal effects of compounds 4 and 5 were evaluated. The results demonstrated that compound 5 was the most active compound, killing about 100% and 64% of the parasites in 0.3 mg/ml and 0.003 mg/ml concentrations, respectively. Interestingly, compound 4 also inhibited myeloma cell growth in a dose-dependent manner.
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Affiliation(s)
- N Boechat
- Department of Research and Development, Far-Manguinhos, Fundação Oswaldo Cruz, R. Sizenando Nabuco, Rio de Janeiro, Brazil
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Boechat N, Bouchonnet F, Bonay M, Grodet A, Pelicic V, Gicquel B, Hance AJ. Culture at high density improves the ability of human macrophages to control mycobacterial growth. J Immunol 2001; 166:6203-11. [PMID: 11342642 DOI: 10.4049/jimmunol.166.10.6203] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The mechanisms through which granuloma formation helps control mycobacterial infection are poorly understood, but it is possible that the accumulation of macrophages at high density at sites of infection promotes the differentiation of macrophages into cells with improved mycobactericidal activity. To test this possibility, varying numbers of monocytes were cultured in 96-well plates for 3 days, infected with Mycobacterium bovis bacillus Calmette-Guérin, and mycobacterial number was assessed 7 days after infection based on the measurement of luciferase activity expressed by a mycobacterial reporter strain or by counting CFU. Mycobacterial growth was optimal in cultures containing 5 x 10(4) cells/well, but increasing the number of cells to 2 x 10(5) cells/well resulted in complete inhibition of mycobacterial growth. This effect could not be explained by differences in mycobacterial uptake, multiplicity of infection, acidification of the extracellular medium in high density cultures, enhanced NO production, or paracrine stimulation resulting from secretion of cytokines or other proteins. The morphology of cells cultured at high density was strikingly different from that of monocytes cultured at 5 x 10(4) cells/well, including the appearance of numerous giant cells. The bacteriostatic activity of monocyte-derived macrophages was also dependent on cell number, but fewer of these more mature cells were required to control mycobacterial growth. Thus, the ability of human macrophages to control mycobacterial infection in vitro is influenced by the density of cells present, findings that may help explain why the formation of granulomas in vivo appears to be a key event in the control of mycobacterial infections.
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Affiliation(s)
- N Boechat
- Institut National de la Santé et de la Recherche Médicale, Unité 82, Institut National de la Santé et de la Recherche Médicale, Hôpital Bichat-Claude Bernard, Paris, France
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Lapa e Silva JR, Linhares C, Boechat N, Rego L, Almeida MG, Kriski AL, Ho JL. Phenotypes of lung mononuclear phagocytes in HIV seronegative tuberculosis patients: evidence for new recruitment and cell activation. Mem Inst Oswaldo Cruz 1996; 91:389-94. [PMID: 9040862 DOI: 10.1590/s0074-02761996000300026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Mycobacterium tuberculosis preferentially resides in mononuclear phagocytes. The mechanisms by which mononuclear phagocytes keep M. tuberculosis in check or by which the microbe evades control to cause disease remain poorly understood. As an initial effort to delineate these mechanisms, we examined by immunostaining the phenotype of mononuclear phagocytes obtained from lungs of patients with active tuberculosis. From August 1994 to March 1995, consecutive patients who had an abnormal chest X-ray, no demonstrable acid-fast bacilli in sputum specimens and required a diagnostic bronchoalveolar lavage (BAL) were enrolled. Of the 39 patients enrolled, 21 had microbiologically diagnosed tuberculosis. Thirteen of the 21 tuberculosis patients were either HIV seronegative (n = 12) or had no risk factor for HIV and constituted the tuberculosis group. For comparison, M. tuberculosis negative patients who had BAL samples taken during this time (n = 9) or normal healthy volunteers (n = 3) served as control group. Compared to the control group, the tuberculosis group had significantly higher proportion of cells expressing markers of young monocytes (UCHM1) and RFD7, a marker for phagocytic cells, and increased expression of HLA-DR, a marker of cell activation. In addition, tuberculosis group had significantly higher proportion of cells expressing dendritic cell marker (RFD1) and epithelioid cell marker (RFD9). These data suggest that despite recruitment of monocytes probably from the peripheral blood and local cell activation, host defense of the resident lung cells is insufficient to control M. tuberculosis.
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Affiliation(s)
- J R Lapa e Silva
- Laboratório Multidisciplinar de Pesquisa, Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Brasil
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Nicholson S, Bonecini-Almeida MDG, Lapa e Silva JR, Nathan C, Xie QW, Mumford R, Weidner JR, Calaycay J, Geng J, Boechat N, Linhares C, Rom W, Ho JL. Inducible nitric oxide synthase in pulmonary alveolar macrophages from patients with tuberculosis. J Exp Med 1996; 183:2293-302. [PMID: 8642338 PMCID: PMC2192561 DOI: 10.1084/jem.183.5.2293] [Citation(s) in RCA: 375] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The high-output pathway of nitric oxide production helps protect mice from infection by several pathogens, including Mycobacterium tuberculosis. However, based on studies of cells cultured from blood, it is controversial whether human mononuclear phagocytes can express the corresponding inducible nitric oxide synthase (iNOS;NOS2). The present study examined alveolar macrophages fixed directly after bronchopulmonary lavage. An average of 65% of the macrophages from 11 of 11 patients with untreated, culture-positive pulmonary tuberculosis reacted with an antibody documented herein to be monospecific for human NOS2. In contrast, a mean of 10% of bronchoalveolar lavage cells were positive from each of five clinically normal subjects. Tuberculosis patients' macrophages displayed diaphorase activity in the same proportion that they stained for NOS2, under assay conditions wherein the diaphorase reaction was strictly dependent on NOS2 expression. Bronchoalveolar lavage specimens also contained NOS2 mRNA. Thus, macrophages in the lungs of people with clinically active Mycobacterium tuberculosis infection often express catalytically competent NOS2.
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Affiliation(s)
- S Nicholson
- Beatrice and Samuel A. Seaver Laboratory, Division of Hematology-Oncology Cornell University Medical College, New York 10021, USA
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