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Roque-Borda CA, Bento da Silva P, Rodrigues MC, Di Filippo LD, Duarte JL, Chorilli M, Vicente EF, Garrido SS, Rogério Pavan F. Pharmaceutical nanotechnology: Antimicrobial peptides as potential new drugs against WHO list of critical, high, and medium priority bacteria. Eur J Med Chem 2022; 241:114640. [PMID: 35970075 DOI: 10.1016/j.ejmech.2022.114640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 03/18/2022] [Revised: 07/12/2022] [Accepted: 07/27/2022] [Indexed: 12/29/2022]
Abstract
Nanobiotechnology is a relatively unexplored area that has, nevertheless, shown relevant results in the fight against some diseases. Antimicrobial peptides (AMPs) are biomacromolecules with potential activity against multi/extensively drug-resistant bacteria, with a lower risk of generating bacterial resistance. They can be considered an excellent biotechnological alternative to conventional drugs. However, the application of several AMPs to biological systems is hampered by their poor stability and lifetime, inactivating them completely. Therefore, nanotechnology plays an important role in the development of new AMP-based drugs, protecting and carrying the bioactive to the target. This is the first review article on the different reported nanosystems using AMPs against bacteria listed on the WHO priority list. The current shortage of information implies a nanobiotechnological potential to obtain new drugs or repurpose drugs based on the AMP-drug synergistic effect.
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Affiliation(s)
- Cesar Augusto Roque-Borda
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Tuberculosis Research Laboratory, Araraquara, São Paulo, CEP 14800-903, Brazil; Universidad Católica de Santa María, Vicerrectorado de Investigación, Facultad de Ciencias Farmacéuticas Bioquímicas y Biotecnológicas, Brazil
| | - Patricia Bento da Silva
- Laboratory of Nanobiotechnology, Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia, Brazil
| | - Mosar Corrêa Rodrigues
- Laboratory of Nanobiotechnology, Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia, Brazil
| | - Leonardo Delello Di Filippo
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Department of Drugs and Medicines, Araraquara, São Paulo, CEP 14800-903, Brazil
| | - Jonatas L Duarte
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Department of Drugs and Medicines, Araraquara, São Paulo, CEP 14800-903, Brazil
| | - Marlus Chorilli
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Department of Drugs and Medicines, Araraquara, São Paulo, CEP 14800-903, Brazil
| | - Eduardo Festozo Vicente
- São Paulo State University (UNESP), School of Sciences and Engineering, Tupã, São Paulo, CEP 17602-496, Brazil
| | - Saulo Santesso Garrido
- São Paulo State University (UNESP), Institute of Chemistry, Araraquara, São Paulo, CEP 14801-902, Brazil
| | - Fernando Rogério Pavan
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Tuberculosis Research Laboratory, Araraquara, São Paulo, CEP 14800-903, Brazil.
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Zolin GVS, da Fonseca FH, Zambom CR, Garrido SS. Histatin 5 Metallopeptides and Their Potential against Candida albicans Pathogenicity and Drug Resistance. Biomolecules 2021; 11:biom11081209. [PMID: 34439875 PMCID: PMC8391865 DOI: 10.3390/biom11081209] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/09/2021] [Accepted: 08/11/2021] [Indexed: 12/16/2022] Open
Abstract
Usually caused by Candida albicans, buccal candidiasis begins with the morphological transition between yeast and hyphal cells. Over time and without the correct treatment, it can be disseminated through the bloodstream becoming a systemic infection with high mortality rates. C. albicans already shows resistance against antifungals commonly used in treatments. Therefore, the search for new drugs capable of overcoming antifungal resistance is essential. Histatin 5 (Hst5) is an antimicrobial peptide of the Histatin family, that can be found naturally in human saliva. This peptide presents high antifungal activity against C. albicans. However, Hst5 action can be decreased for interaction with enzymes and metal ions present in the oral cavity. The current work aims to bring a brief review of relevant aspects of the pathogenesis and resistance mechanisms already reported for C. albicans. In addition, are also reported here the main immune responses of the human body and the most common antifungal drugs. Finally, the most important aspects regarding Histatin 5 and the benefits of its interaction with metals are highlighted. The intention of this review is to show the promising use of Hst5 metallopeptides in the development of effective drugs.
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Farias RL, Polez AMR, Silva DES, Zanetti RD, Moreira MB, Batista VS, Reis BL, Nascimento-Júnior NM, Rocha FV, Lima MA, Oliveira AB, Ellena J, Scarim CB, Zambom CR, Brito LD, Garrido SS, Melo APL, Bresolin L, Tirloni B, Pereira JCM, Netto AVG. In vitro and in silico assessment of antitumor properties and biomolecular binding studies for two new complexes based on Ni II bearing k 2N,S-donor ligands. Mater Sci Eng C Mater Biol Appl 2020; 121:111815. [PMID: 33579459 DOI: 10.1016/j.msec.2020.111815] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/20/2020] [Accepted: 12/13/2020] [Indexed: 12/30/2022]
Abstract
This work deals with two new molecule-based materials, namely NiII-complexes of general formulae [Ni(L1)2] (Ni1) and [Ni(L2)2] (Ni2), where L1 = trans-cinnamaldehyde-N(4)-methyl thiosemicarbazone and L2 = trans-cinnamaldehyde-N(4)-ethyl thiosemicarbazone, as potential antitumor agents. Both compounds were characterized by elemental analysis, molar conductivity and spectroscopic techniques (FTIR and NMR). Their molecular structures were obtained by single-crystal X-ray diffraction analysis. Each one crystallizes in a monoclinic space group P 21/c, also the asymmetric unit comprises of one NiII ion located on an inversion centre and one anionic ligand, which acts as a κ2N,S-donor affording a five-membered metallaring. The compounds were screened against two selected tumour cell lines (MCF-7 and A549) and non-tumour fibroblasts cell line (MRC-5) via MTT assays. In both tumour cells, all compounds exhibited higher cytotoxicity than the control drug (cisplatin). The IC50 values ranges of 3.70 - 41.37 μM and 1.06 - 14.91 μM were found for MCF-7 and A549, respectively. Importantly, all of them were less toxicity than cisplatin in MRC-5 with SI values ranged at 11.80 - 86.60. The red blood cell (RBC) assay revealed Ni2 as non-toxic due to its reduced haemolytic effect (0--9% at 1--10 μM). The DNA binding was investigated through a combination of spectrophotometric absorption and emission titrations, electrophoresis, and circular dichroism experiments. As a result, these metal complexes were not able to strongly binding to DNA (Kb values ~104 mol L--1) but suggesting groove-binding interactions. The scavenging ability of them towards 2,2-diphenyl-1-picrylhydrazyl (DPPH) free-radical was also evaluated in this work, but no important antioxidant behaviour was detected. Further, the interaction of Ni1 and Ni2 to human serum albumin (HSA) was explored by quenching of tryptophan emission, warfarin competitive assay, and molecular docking protocols. The HSA binding analyses indicated good affinity of both complexes to Sudlow site I (Kb values ⁓103 mol L-1).
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Affiliation(s)
- R L Farias
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil.
| | - A M R Polez
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil
| | - D E S Silva
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil
| | - R D Zanetti
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil
| | - M B Moreira
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil; Univ. Estadual de Londrina (UEL), Departamento de Química, Londrina, Brazil
| | - V S Batista
- Univ. Estadual Paulista (Unesp), Instituto de Química, Laboratório de Química Medicinal, Síntese Orgânica e Modelagem Molecular (LaQMedSOMM), Araraquara, Brazil
| | - B L Reis
- Univ. Estadual Paulista (Unesp), Instituto de Química, Laboratório de Química Medicinal, Síntese Orgânica e Modelagem Molecular (LaQMedSOMM), Araraquara, Brazil; Technische Universität Dresden (TUD), Department of Chemistry and Food Chemistry, Dresden, Germany
| | - N M Nascimento-Júnior
- Univ. Estadual Paulista (Unesp), Instituto de Química, Laboratório de Química Medicinal, Síntese Orgânica e Modelagem Molecular (LaQMedSOMM), Araraquara, Brazil
| | - F V Rocha
- Univ. Federal de São Carlos (UFSCar), Departamento de Química, São Carlos, Brazil
| | - M A Lima
- Univ. Federal de São Carlos (UFSCar), Departamento de Química, São Carlos, Brazil
| | - A B Oliveira
- Univ. Federal de Sergipe (UFS), Departamento de Química, São Cristóvão, Brazil
| | - J Ellena
- Univ. de São Paulo (USP), Instituto de Física de São Carlos, São Carlos, Brazil
| | - C B Scarim
- Univ. Estadual Paulista (Unesp), Faculdade de Ciências Farmacêuticas, Araraquara, Brazil
| | - C R Zambom
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Bioquímica e Química Orgânica, Araraquara, Brazil
| | - L D Brito
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Bioquímica e Química Orgânica, Araraquara, Brazil
| | - S S Garrido
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Bioquímica e Química Orgânica, Araraquara, Brazil
| | - A P L Melo
- Univ. Federal do Rio Grande (FURG), Escola de Química e Alimentos, Rio Grande, Brazil
| | - L Bresolin
- Univ. Federal do Rio Grande (FURG), Escola de Química e Alimentos, Rio Grande, Brazil
| | - B Tirloni
- Univ. Federal de Santa Maria (UFSM), Departamento de Química, Santa Maria, Brazil
| | - J C M Pereira
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil
| | - A V G Netto
- Univ. Estadual Paulista (Unesp), Instituto de Química, Departamento de Química Analítica, Físico-Química e Inorgânica, Araraquara, Brazil
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Bassan JC, de Souza Bezerra TM, Peixoto G, da Cruz CZP, Galán JPM, dos Santos Vaz AB, Garrido SS, Filice M, Monti R. Addendum: Bassan, J.C.; et al. Immobilization of Trypsin in Lignocellulosic Waste Material to Produce Peptides with Bioactive Potential from Whey Protein. Materials 2016, 9(5), 357. Materials 2016. [PMCID: PMC5512527 DOI: 10.3390/ma9080705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Juliana Cristina Bassan
- Faculdade de Ciências Farmacêuticas, UNESP—Univ. Estadual Paulista, 14800-903, Departamento de Alimentos e Nutrição, Araraquara-SP, Brazil; (J.C.B.); (J.P.M.G.)
| | - Thaís Milena de Souza Bezerra
- Instituto de Química, UNESP—Univ. Estadual Paulista, 14800-060, Departamento de Bioquímica e Tecnologia Química, Araraquara-SP, Brazil; (T.M.d.S.B.); (C.Z.P.d.C.); (A.B.d.S.V.); (S.S.G.)
| | - Guilherme Peixoto
- Faculdade de Ciências Farmacêuticas, UNESP—Univ. Estadual Paulista, 14800-903, Departamento de Bioprocessos e Biotecnologia, Araraquara-SP, Brazil
- Correspondence: (G.P.); (R.M.); Tel.: +55-16-3301-4645 (G.P.); +55-16-3301-6934 (R.M.)
| | - Clariana Zanutto Paulino da Cruz
- Instituto de Química, UNESP—Univ. Estadual Paulista, 14800-060, Departamento de Bioquímica e Tecnologia Química, Araraquara-SP, Brazil; (T.M.d.S.B.); (C.Z.P.d.C.); (A.B.d.S.V.); (S.S.G.)
| | - Julián Paul Martínez Galán
- Faculdade de Ciências Farmacêuticas, UNESP—Univ. Estadual Paulista, 14800-903, Departamento de Alimentos e Nutrição, Araraquara-SP, Brazil; (J.C.B.); (J.P.M.G.)
| | - Aline Buda dos Santos Vaz
- Instituto de Química, UNESP—Univ. Estadual Paulista, 14800-060, Departamento de Bioquímica e Tecnologia Química, Araraquara-SP, Brazil; (T.M.d.S.B.); (C.Z.P.d.C.); (A.B.d.S.V.); (S.S.G.)
| | - Saulo Santesso Garrido
- Instituto de Química, UNESP—Univ. Estadual Paulista, 14800-060, Departamento de Bioquímica e Tecnologia Química, Araraquara-SP, Brazil; (T.M.d.S.B.); (C.Z.P.d.C.); (A.B.d.S.V.); (S.S.G.)
| | - Marco Filice
- Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III, Melchor Fernández Almagro, Madrid 28029, Spain;
| | - Rubens Monti
- Faculdade de Ciências Farmacêuticas, UNESP—Univ. Estadual Paulista, 14800-903, Departamento de Alimentos e Nutrição, Araraquara-SP, Brazil; (J.C.B.); (J.P.M.G.)
- Correspondence: (G.P.); (R.M.); Tel.: +55-16-3301-4645 (G.P.); +55-16-3301-6934 (R.M.)
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Bernegossi J, Calixto GMF, Sanches PRDS, Fontana CR, Cilli EM, Garrido SS, Chorilli M. Peptide KSL-W-Loaded Mucoadhesive Liquid Crystalline Vehicle as an Alternative Treatment for Multispecies Oral Biofilm. Molecules 2015; 21:E37. [PMID: 26712726 PMCID: PMC6273598 DOI: 10.3390/molecules21010037] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/04/2015] [Accepted: 12/04/2015] [Indexed: 11/20/2022] Open
Abstract
Decapeptide KSL-W shows antibacterial activities and can be used in the oral cavity, however, it is easily degraded in aqueous solution and eliminated. Therefore, we aimed to develop liquid crystalline systems (F1 and F2) for KSL-W buccal administration to treat multispecies oral biofilms. The systems were prepared with oleic acid, polyoxypropylene (5) polyoxyethylene (20) cetyl alcohol (PPG-5-CETETH-20), and a 1% poloxamer 407 dispersion as the oil phase (OP), surfactant (S), and aqueous phase (AP), respectively. We characterized them using polarized light microscopy (PLM), small-angle X-ray scattering (SAXS), rheology, and in vitro bioadhesion, and performed in vitro biological analysis. PLM showed isotropy (F1) or anisotropy with lamellar mesophases (F2), confirmed by peak ratio quantification using SAXS. Rheological tests demonstrated that F1 exhibited Newtonian behavior but not F2, which showed a structured AP concentration-dependent system. Bioadhesion studies revealed an AP concentration-dependent increase in the system’s bioadhesiveness (F2 = 15.50 ± 1.00 mN·s) to bovine teeth blocks. Antimicrobial testing revealed 100% inhibition of multispecies oral biofilm growth after KSL-W administration, which was incorporated in the F2 aqueous phase at a concentration of 1 mg/mL. Our results suggest that this system could serve as a potential vehicle for buccal administration of antibiofilm peptides.
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Affiliation(s)
- Jéssica Bernegossi
- School of Pharmaceutical Sciences, Sao Paulo State University, UNESP, Rodovia Araraquara-Jaú Km 01, Araraquara, SP 14800-850, Brazil.
| | - Giovana Maria Fioramonti Calixto
- School of Pharmaceutical Sciences, Sao Paulo State University, UNESP, Rodovia Araraquara-Jaú Km 01, Araraquara, SP 14800-850, Brazil.
| | | | - Carla Raquel Fontana
- School of Pharmaceutical Sciences, Sao Paulo State University, UNESP, Rodovia Araraquara-Jaú Km 01, Araraquara, SP 14800-850, Brazil.
| | - Eduardo Maffud Cilli
- Chemistry Institute, Sao Paulo State University, UNESP, Campus Araraquara, Araraquara, SP 14800-900, Brazil.
| | - Saulo Santesso Garrido
- Chemistry Institute, Sao Paulo State University, UNESP, Campus Araraquara, Araraquara, SP 14800-900, Brazil.
| | - Marlus Chorilli
- School of Pharmaceutical Sciences, Sao Paulo State University, UNESP, Rodovia Araraquara-Jaú Km 01, Araraquara, SP 14800-850, Brazil.
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Garrido SS, De Oliveira IC, Zambom CR, Vaz ABDS, Marchetto R, Barbosa LCB. Avaliação quantitativa da susceptibilidade do crescimento de Staphylococcus aureus na presença de sistemas antimicrobianos de alta complexidade. Eclet Quim J 2015. [DOI: 10.26850/1678-4618eqj.v40.1.2015.p95-105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Antimicrobial peptides (PAMs) found naturally in living organisms are a great promise for the fight against infectious diseases specially by microorganisms multiresistant to the commercial antibiotics available on the market due to intensive and inadequate applying of those substances. However, some particular characteristics that may be present in PAMs (big size, low solubility, the existence of effective load, high structural complexity, etc.) pose difficulty vis-à-vis the use of this class of substances for clinical application. As an approach to solve this technical barrier to application of PAMs, different formulations of LUV liposomes were prepared with the intent to promote the encapsulation of CcdBET2, a proven PAM, and promote its delivery in the intracellular environment. CcdBET2 was synthesized by solid-phase methodology and the 100 nm liposomes by extrusion. The peptide-liposomes systems were tested against Staphylococcus aureus by a quantitative methodology using MTT to test their ability in promote the interruption of cell growth. It is possible to suggest that the liposomal system is responsible to interact with the bacterial membrane allowing CcdBET2 to exert its antimicrobial activity.
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Barbosa LCB, Garrido SS, Marchetto R. BtoxDB: a comprehensive database of protein structural data on toxin-antitoxin systems. Comput Biol Med 2015; 58:146-53. [PMID: 25656309 DOI: 10.1016/j.compbiomed.2015.01.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 08/26/2014] [Revised: 01/11/2015] [Accepted: 01/12/2015] [Indexed: 11/28/2022]
Abstract
PURPOSE Toxin-antitoxin (TA) systems are diverse and abundant genetic modules in prokaryotic cells that are typically formed by two genes encoding a stable toxin and a labile antitoxin. Because TA systems are able to repress growth or kill cells and are considered to be important actors in cell persistence (multidrug resistance without genetic change), these modules are considered potential targets for alternative drug design. In this scenario, structural information for the proteins in these systems is highly valuable. In this report, we describe the development of a web-based system, named BtoxDB, that stores all protein structural data on TA systems. METHODS The BtoxDB database was implemented as a MySQL relational database using PHP scripting language. Web interfaces were developed using HTML, CSS and JavaScript. The data were collected from the PDB, UniProt and Entrez databases. These data were appropriately filtered using specialized literature and our previous knowledge about toxin-antitoxin systems. RESULTS The database provides three modules ("Search", "Browse" and "Statistics") that enable searches, acquisition of contents and access to statistical data. Direct links to matching external databases are also available. CONCLUSIONS The compilation of all protein structural data on TA systems in one platform is highly useful for researchers interested in this content. BtoxDB is publicly available at http://www.gurupi.uft.edu.br/btoxdb.
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Affiliation(s)
- Luiz Carlos Bertucci Barbosa
- UFT - Federal University of Tocantins, Department of Biotechnology, Caixa Postal 66, Gurupi 77402-970, Tocantins, Brazil.
| | - Saulo Santesso Garrido
- UNESP - Universidade Estadual Paulista, Institute of Chemistry, Department of Biochemistry and Technological Chemistry, Araraquara 14800-000, São Paulo, Brazil
| | - Reinaldo Marchetto
- UNESP - Universidade Estadual Paulista, Institute of Chemistry, Department of Biochemistry and Technological Chemistry, Araraquara 14800-000, São Paulo, Brazil
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Santos GPD, Silva BFD, Garrido SS, Mascini M, Yamanaka H. Design, synthesis and characterization of a hexapeptide bio-inspired by acetylcholinesterase and its interaction with pesticide dichlorvos. Analyst 2014; 139:273-9. [DOI: 10.1039/c3an01498c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Barbosa LCB, Garrido SS, Garcia A, Delfino DB, Santos LDN, Marchetto R. Design and synthesis of peptides from bacterial ParE toxin as inhibitors of topoisomerases. Eur J Med Chem 2012; 54:591-6. [PMID: 22749642 DOI: 10.1016/j.ejmech.2012.06.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 06/04/2012] [Accepted: 06/05/2012] [Indexed: 12/16/2022]
Abstract
Toxin-antitoxin (TA) proteic systems encode a toxin and an antitoxin that regulate the growth and death of bacterial cells under various stress conditions. The ParE protein is a toxin that inhibits DNA gyrase activity and thereby blocks DNA replication. Based on the Escherichia coli ParE structure, a series of linear peptides were designed and synthesized by solid-phase methodology. The ability of the peptides to inhibit the activity of bacterial topoisomerases was investigated. Four peptides (ParELC3, ParELC8, ParELC10 and ParELC12), showed complete inhibition of DNA gyrase supercoiling activity with an IC(100) between 20 and 40 μmol L(-1). In contrast to wild-type ParE, the peptide analogues were able to inhibit the DNA relaxation of topoisomerase IV, another type IIA bacterial topoisomerase, with lower IC(100) values. Interestingly only ParELC12 displayed inhibition of the relaxation activity of human topoisomerase II. Our findings reveal new inhibitors of bacterial topoisomerases and are a good starting point for the development of a new class of antibacterial agents that targets the DNA topoisomerases.
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Affiliation(s)
- Luiz Carlos Bertucci Barbosa
- UNESP - Institute of Chemistry, Department of Biochemistry and Technological Chemistry, Caixa Postal 355, 14800-900 Araraquara, São Paulo, Brazil
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Bertucci Barbosa LC, Garrido SS, Garcia A, Delfino DB, Gonçalves RD, Marchetto R. Easy Bioinformatics Analysis (EBiAn): a package for manipulating and analysis of short biological sequences. Bioinformation 2010; 5:46-8. [PMID: 21346860 PMCID: PMC3039986 DOI: 10.6026/97320630005046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Accepted: 06/08/2010] [Indexed: 11/29/2022] Open
Abstract
The work of biochemists and molecular biologists often is dependent or extremely favored by a preliminary computer analysis. Thus, the development of
an efficient and friendly computational tool is very important. In this work, we developed a package of programs in Javascript language which can be used
online or locally. The programs depend exclusively of Web browsers and are compatible with Internet Explorer, Opera, Mozilla Firefox and Google
Chrome. With the EBiAn package it is can perform the main analysis and manipulation of DNA, RNA, proteins and peptides sequences. The programs
can be freely accessed and adapted or modified to generate new programs.
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Barbosa LCB, Garrido SS, Garcia A, Delfino DB, Marchetto R. Function inferences from a molecular structural model of bacterial ParE toxin. Bioinformation 2010; 4:438-40. [PMID: 20975905 PMCID: PMC2951705 DOI: 10.6026/97320630004438] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 04/09/2010] [Indexed: 11/26/2022] Open
Abstract
Toxin-antitoxin (TA) systems contribute to plasmid stability by a mechanism that relies on the differential stabilities of the toxin and
antitoxin proteins and leads to the killing of daughter bacteria that did not receive a plasmid copy at the cell division. ParE is the toxic
component of a TA system that constitutes along with RelE an important class of bacterial toxin called RelE/ParE superfamily. For ParE
toxin, no crystallographic structure is available so far and rare in vitro studies demonstrated that the target of toxin activity is E. coli DNA
gyrase. Here, a 3D Model for E. coli ParE toxin by molecular homology modeling was built using MODELLER, a program for comparative
modeling. The Model was energy minimized by CHARMM and validated using PROCHECK and VERIFY3D programs. Resulting
Ramachandran plot analysis it was found that the portion residues failing into the most favored and allowed regions was 96.8%. Structural
similarity search employing DALI server showed as the best matches RelE and YoeB families. The Model also showed similarities with
other microbial ribonucleases but in a small score. A possible homologous deep cleft active site was identified in the Model using CASTp
program. Additional studies to investigate the nuclease activity in members of ParE family as well as to confirm the inhibitory replication
activity are needed. The predicted Model allows initial inferences about the unexplored 3D structure of the ParE toxin and may be further
used in rational design of molecules for structurefunction studies.
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Affiliation(s)
- Luiz Carlos Bertucci Barbosa
- Institute of Chemistry, UNESP - Univ Estadual Paulista, Department of Biochemistry and Technological Chemistry, Araraquara, São Paulo, Brazil
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Cotrim CA, Garrido SS, Trovatti E, Marchetto R. Síntese, caracterização e estudos de interação de um análogo da antitoxina CcdA empregando fluorescência no estado estacionário. QUIM NOVA 2010. [DOI: 10.1590/s0100-40422010000400014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Garrido SS, Scatigno AC, Trovatti E, Carvalho DC, Marchetto R. Probing the binding of the coumarin drugs using peptide fragments of DNA gyrase B protein. ACTA ACUST UNITED AC 2005; 65:502-11. [PMID: 15853944 DOI: 10.1111/j.1399-3011.2005.00264.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 11/28/2022]
Abstract
Bacterial DNA gyrase, has been identified as the target of several antibacterial agents, including the coumarin drugs. The coumarins inhibit the gyrase action by competitive binding to the ATP-binding site of DNA gyrase B (GyrB) protein. The high in vitro inhibitory potency of coumarins against DNA gyrase reactions has raised interest in studies on coumarin-gyrase interactions. In this context, a series of low-molecular weight peptides, including the coumarin resistance-determining region of subunit B of Escherichia coli gyrase, has been designed and synthesized. The first peptide model was built using the natural fragment 131-146 of GyrB and was able to bind to novobiocin (K(a) = 1.8 +/- 0.2 x 10(5)/m) and ATP (K(a) = 1.9 +/- 0.4 x 10(3)/m). To build the other sequences, changes in the Arg(136) residue were introduced so that the binding to the drug was progressively reduced with the hydrophobicity of this residue (K(a) = 1.3 +/- 0.1 x 10(5)/m and 1.0 +/- 0.2 x 10(5)/m for Ser and His, respectively). No binding was observed for the change Arg(136) to Leu. In contrast, the binding to ATP was not altered, independently of the changes promoted. On the contrary, for peptide-coumarin and peptide-ATP complexes, Mg(2+) appears to modulate the binding process. Our results demonstrate the crucial role of Arg(136) residue for the stability of coumarin-gyrase complex as well as suggest a different binding site for ATP and in both cases the interactions are mediated by magnesium ions.
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Affiliation(s)
- S S Garrido
- Department of Biochemistry and Technological Chemistry, UNESP -- Institute of Chemistry, Caixa Postal 355, 14800-900 Araraquara, São Paulo, Brazil
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