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Brandão STR, Dos Santos A, Bueno PR, Cilli EM. Designing Quantum Capacitive Peptide Interfaces for Electroanalytical Applications. Anal Chem 2023; 95:13470-13477. [PMID: 37647515 DOI: 10.1021/acs.analchem.3c01363] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Redox-active moieties assembled on metallic interfaces have been shown to follow quantum mechanical rules, where the quantum capacitance of the interface (directly associated with the electronic structure of the redox-active moieties) plays a key role in the electron transfer dynamics of the interface. Modifying these interfaces with biological receptors has significant advantages (simplifying molecular diagnostics methods, reducing size, time, and cost while maintaining high sensitivity), enabling the fabrication of miniaturized electroanalytical devices that can compete with traditional ELISA and RT-PCR benchtop assay methods. Owing to their intrinsic characteristics, the use of peptide-based redox-active moieties is a promising chemical route for modifying metallic surfaces, resulting in a high quantum capacitive signal sensitivity. In the present work, different ferrocene-tagged peptides with a structure of Fc-Glu-XX-XX-Cys-NH2 (XX = serine, phenylalanine, glycine) were used to form self-assembled monolayers on gold. The feasibility of using these interfaces in an electroanalytical assay was verified by detecting the NS1 DENV (Dengue Virus) biomarker to compare the efficiency of peptide structures for biosensing purposes. Parameters such as the formal potential of the interface, normalized electronic density of states (DOS), quantum capacitance, and electron transfer rate constants were obtained for Ser-, Phe-, and Gly-peptides. The Gly-peptide structure presented the highest analytical performance for sensing NS1 with a sensitivity of 5.6% per decade and the lowest LOD (1.4 ng mL-1) and LOQ (2.6 ng mL-1), followed by Phe-peptide, whereas Ser-peptide had the lowest performance. This work demonstrates that the use of peptides to fabricate a self-assembled monolayer as a biosensor component has advantages for low-cost point-of-care diagnostics. It also shows that the performance of the sensing interface depends strongly on how the chemistry of the surface is designed as a whole, not only on the redox-active group.
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Affiliation(s)
- Sarah T R Brandão
- Institute of Chemistry, São Paulo State University (UNESP), 14800-060 Araraquara, São Paulo, Brazil
| | - Adriano Dos Santos
- Institute of Chemistry, São Paulo State University (UNESP), 14800-060 Araraquara, São Paulo, Brazil
| | - Paulo R Bueno
- Institute of Chemistry, São Paulo State University (UNESP), 14800-060 Araraquara, São Paulo, Brazil
| | - Eduardo M Cilli
- Institute of Chemistry, São Paulo State University (UNESP), 14800-060 Araraquara, São Paulo, Brazil
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2
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Bastos TSB, de Paula AGP, Dos Santos Luz RB, Garnique AMB, Belo MAA, Eto SF, Fernandes DC, Ferraris FK, de Pontes LG, França TT, Barcellos LJG, Veras FP, Bermejo P, Guidelli G, Maneira C, da Silveira Bezerra de Mello F, Teixeira G, Pereira GAG, Fernandes BHV, Sanches PRS, Braz HLB, Jorge RJB, Malafaia G, Cilli EM, Olivier DDS, do Amaral MS, Medeiros RJ, Condino-Neto A, Carvalho LR, Machado-Santelli GM, Charlie-Silva I, Galindo-Villegas J, Braga TT. Author Correction: A novel insight on SARS-CoV-2 S-derived fragments in the control of the host immunity. Sci Rep 2023; 13:12012. [PMID: 37491374 PMCID: PMC10368618 DOI: 10.1038/s41598-023-39134-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023] Open
Affiliation(s)
| | | | | | - Anali M B Garnique
- Department of Cell Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Silas Fernandes Eto
- Center of Excellence in New Target Discovery (CENTD) Special Laboratory, Butantan Institute, São Paulo, Brazil
- Center of Innovation and Development, Laboratory of Development and Innovation, Butantan Institute, São Paulo, Brazil
| | | | - Fausto Klabund Ferraris
- Department of Pharmacology and Toxicology, Oswaldo Cruz Foundation, FIOCRUZ, Rio de Janeiro, Brazil
| | - Leticia Gomes de Pontes
- Laboratory of Human Immunology, Department Immunology, Institute Biomedical Sciences, University São Paulo, São Paulo, Brazil
| | - Tábata Takahashi França
- Laboratory of Human Immunology, Department Immunology, Institute Biomedical Sciences, University São Paulo, São Paulo, Brazil
| | - Leonardo José Gil Barcellos
- Laboratory of Fish Physiology, Graduate Program of Bioexperimentation, University of Passo Fundo, Santa Maria, Brazil
- Graduate Program of Pharmacology, Federal University of Santa Maria, Santa Maria, Brazil
| | - Flavio P Veras
- Center of Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of Sao Paulo, Ribeirão Preto, São Paulo, Brazil
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, São Paulo, Brazil
| | - Pamela Bermejo
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | - Giovanna Guidelli
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | - Carla Maneira
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | | | - Gleidson Teixeira
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | | | - Bianca H Ventura Fernandes
- Laboratório de Controle Genético e Sanitário, Diretoria Técnica de Apoio ao Ensino e Pesquisa, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Paulo R S Sanches
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Helyson Lucas Bezerra Braz
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Roberta Jeane Bezerra Jorge
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Guilherme Malafaia
- Biological Research Laboratory, Goiano Federal Institute, Urutai Campus, Urutaí, GO, Brazil
| | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | | | - Marcos Serrou do Amaral
- Institute of Physics, Federal University of Mato Grosso do Sul, Campo Grande, MS, 79070-900, Brazil
| | - Renata J Medeiros
- Laboratory of Physiology, INCQS/Fiocruz Zebrafish Facility, Department of Pharmacology and Toxicology, National Institute for Quality Control in Health, Rio de Janeiro, Brazil
| | - Antonio Condino-Neto
- Laboratory of Human Immunology, Department Immunology, Institute Biomedical Sciences, University São Paulo, São Paulo, Brazil
| | - Luciani R Carvalho
- Laboratório de Controle Genético e Sanitário, Diretoria Técnica de Apoio ao Ensino e Pesquisa, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Glaucia M Machado-Santelli
- Laboratory of Cellular and Molecular Biology, Department of Cell and Developmental Biology, Institute of Biomedical Science, University of Sao Paulo, University of São Paulo, São Paulo, Brazil
| | - Ives Charlie-Silva
- Department of Pharmacology, University of São Paulo-ICB/USP, São Paulo, Brazil.
| | - Jorge Galindo-Villegas
- Department of Genomics, Faculty of Biosciences and Aquaculture, Nord University, Bodø, Norway.
| | - Tárcio Teodoro Braga
- Department of Pathology, Federal University of Parana, Curitiba, Brazil.
- Graduate Program in Biosciences and Biotechnology, Instituto Carlos Chagas, Fiocruz-Parana, Brazil.
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Bastos TSB, de Paula AGP, Dos Santos Luz RB, Garnique AMB, Belo MAA, Eto SF, Fernandes DC, Ferraris FK, de Pontes LG, França TT, Barcellos LJG, Veras FP, Bermejo P, Guidelli G, Maneira C, da Silveira Bezerra de Mello F, Teixeira G, Pereira GAG, Fernandes BHV, Sanches PRS, Braz HLB, Jorge RJB, Malafaia G, Cilli EM, Olivier DDS, do Amaral MS, Medeiros RJ, Condino-Neto A, Carvalho LR, Machado-Santelli GM, Charlie-Silva I, Galindo-Villegas J, Braga TT. A novel insight on SARS-CoV-2 S-derived fragments in the control of the host immunity. Sci Rep 2023; 13:8060. [PMID: 37198208 PMCID: PMC10191404 DOI: 10.1038/s41598-023-29588-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 02/07/2023] [Indexed: 05/19/2023] Open
Abstract
Despite all efforts to combat the pandemic of COVID-19, we are still living with high numbers of infected persons, an overburdened health care system, and the lack of an effective and definitive treatment. Understanding the pathophysiology of the disease is crucial for the development of new technologies and therapies for the best clinical management of patients. Since the manipulation of the whole virus requires a structure with an adequate level of biosafety, the development of alternative technologies, such as the synthesis of peptides from viral proteins, is a possible solution to circumvent this problem. In addition, the use and validation of animal models is of extreme importance to screen new drugs and to compress the organism's response to the disease. Peptides derived from recombinant S protein from SARS-CoV-2 were synthesized and validated by in silico, in vitro and in vivo methodologies. Macrophages and neutrophils were challenged with the peptides and the production of inflammatory mediators and activation profile were evaluated. These peptides were also inoculated into the swim bladder of transgenic zebrafish larvae at 6 days post fertilization (dpf) to mimic the inflammatory process triggered by the virus, which was evaluated by confocal microscopy. In addition, toxicity and oxidative stress assays were also developed. In silico and molecular dynamics assays revealed that the peptides bind to the ACE2 receptor stably and interact with receptors and adhesion molecules, such as MHC and TCR, from humans and zebrafish. Macrophages stimulated with one of the peptides showed increased production of NO, TNF-α and CXCL2. Inoculation of the peptides in zebrafish larvae triggered an inflammatory process marked by macrophage recruitment and increased mortality, as well as histopathological changes, similarly to what is observed in individuals with COVID-19. The use of peptides is a valuable alternative for the study of host immune response in the context of COVID-19. The use of zebrafish as an animal model also proved to be appropriate and effective in evaluating the inflammatory process, comparable to humans.
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Affiliation(s)
| | | | | | - Anali M B Garnique
- Department of Cell Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Silas Fernandes Eto
- Center of Excellence in New Target Discovery (CENTD) Special Laboratory, Butantan Institute, São Paulo, Brazil
- Center of Innovation and Development, Laboratory of Development and Innovation, Butantan Institute, São Paulo, Brazil
| | | | - Fausto Klabund Ferraris
- Department of Pharmacology and Toxicology, Oswaldo Cruz Foundation, FIOCRUZ, Rio de Janeiro, Brazil
| | - Leticia Gomes de Pontes
- Laboratory of Human Immunology, Department Immunology, Institute Biomedical Sciences, University São Paulo, São Paulo, Brazil
| | - Tábata Takahashi França
- Laboratory of Human Immunology, Department Immunology, Institute Biomedical Sciences, University São Paulo, São Paulo, Brazil
| | - Leonardo José Gil Barcellos
- Laboratory of Fish Physiology, Graduate Program of Bioexperimentation, University of Passo Fundo, Santa Maria, Brazil
- Graduate Program of Pharmacology, Federal University of Santa Maria, Santa Maria, Brazil
| | - Flavio P Veras
- Center of Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of Sao Paulo, Ribeirão Preto, São Paulo, Brazil
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, São Paulo, Brazil
| | - Pamela Bermejo
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | - Giovanna Guidelli
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | - Carla Maneira
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | | | - Gleidson Teixeira
- Laboratório de Genômica e bioEnergia (LGE), Institute of Biology - Unicamp, Campinas, Brazil
| | | | - Bianca H Ventura Fernandes
- Laboratório de Controle Genético e Sanitário, Diretoria Técnica de Apoio ao Ensino e Pesquisa, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Paulo R S Sanches
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Helyson Lucas Bezerra Braz
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Roberta Jeane Bezerra Jorge
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Guilherme Malafaia
- Biological Research Laboratory, Goiano Federal Institute, Urutai Campus, Urutaí, GO, Brazil
| | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | | | - Marcos Serrou do Amaral
- Institute of Physics, Federal University of Mato Grosso do Sul, Campo Grande, MS, 79070-900, Brazil
| | - Renata J Medeiros
- Laboratory of Physiology, INCQS/Fiocruz Zebrafish Facility, Department of Pharmacology and Toxicology, National Institute for Quality Control in Health, Rio de Janeiro, Brazil
| | - Antonio Condino-Neto
- Laboratory of Human Immunology, Department Immunology, Institute Biomedical Sciences, University São Paulo, São Paulo, Brazil
| | - Luciani R Carvalho
- Laboratório de Controle Genético e Sanitário, Diretoria Técnica de Apoio ao Ensino e Pesquisa, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Glaucia M Machado-Santelli
- Laboratory of Cellular and Molecular Biology, Department of Cell and Developmental Biology, Institute of Biomedical Science, University of Sao Paulo, University of São Paulo, São Paulo, Brazil
| | - Ives Charlie-Silva
- Department of Pharmacology, University of São Paulo-ICB/USP, São Paulo, Brazil.
| | - Jorge Galindo-Villegas
- Department of Genomics, Faculty of Biosciences and Aquaculture, Nord University, Bodø, Norway.
| | - Tárcio Teodoro Braga
- Department of Pathology, Federal University of Parana, Curitiba, Brazil.
- Graduate Program in Biosciences and Biotechnology, Instituto Carlos Chagas, Fiocruz-Parana, Brazil.
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4
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Rosa IF, Peçanha APB, Carvalho TRB, Alexandre LS, Ferreira VG, Doretto LB, Souza BM, Nakajima RT, da Silva P, Barbosa AP, Gomes-de-Pontes L, Bomfim CG, Machado-Santelli GM, Condino-Neto A, Guzzo CR, Peron JPS, Andrade-Silva M, Câmara NOS, Garnique AMB, Medeiros RJ, Ferraris FK, Barcellos LJG, Correia-Junior JD, Galindo-Villegas J, Machado MFR, Castoldi A, Oliveira SL, Costa CC, Belo MAA, Galdino G, Sgro GG, Bueno NF, Eto SF, Veras FP, Fernandes BHV, Sanches PRS, Cilli EM, Malafaia G, Nóbrega RH, Garcez AS, Carrilho E, Charlie-Silva I. Photobiomodulation Reduces the Cytokine Storm Syndrome Associated with COVID-19 in the Zebrafish Model. Int J Mol Sci 2023; 24:ijms24076104. [PMID: 37047078 PMCID: PMC10094635 DOI: 10.3390/ijms24076104] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/11/2023] [Accepted: 03/14/2023] [Indexed: 04/14/2023] Open
Abstract
Although the exact mechanism of the pathogenesis of coronavirus SARS-CoV-2 (COVID-19) is not fully understood, oxidative stress and the release of pro-inflammatory cytokines have been highlighted as playing a vital role in the pathogenesis of the disease. In this sense, alternative treatments are needed to reduce the level of inflammation caused by COVID-19. Therefore, this study aimed to investigate the potential effect of red photobiomodulation (PBM) as an attractive therapy to downregulate the cytokine storm caused by COVID-19 in a zebrafish model. RT-qPCR analyses and protein-protein interaction prediction among SARS-CoV-2 and Danio rerio proteins showed that recombinant Spike protein (rSpike) was responsible for generating systemic inflammatory processes with significantly increased levels of pro-inflammatory (il1b, il6, tnfa, and nfkbiab), oxidative stress (romo1) and energy metabolism (slc2a1a and coa1) mRNA markers, with a pattern similar to those observed in COVID-19 cases in humans. On the other hand, PBM treatment was able to decrease the mRNA levels of these pro-inflammatory and oxidative stress markers compared with rSpike in various tissues, promoting an anti-inflammatory response. Conversely, PBM promotes cellular and tissue repair of injured tissues and significantly increases the survival rate of rSpike-inoculated individuals. Additionally, metabolomics analysis showed that the most-impacted metabolic pathways between PBM and the rSpike treated groups were related to steroid metabolism, immune system, and lipid metabolism. Together, our findings suggest that the inflammatory process is an incisive feature of COVID-19 and red PBM can be used as a novel therapeutic agent for COVID-19 by regulating the inflammatory response. Nevertheless, the need for more clinical trials remains, and there is a significant gap to overcome before clinical trials can commence.
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Affiliation(s)
- Ivana F Rosa
- Department of Structural and Functional Biology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 01049-010, Brazil
| | - Ana P B Peçanha
- Department of Orthodontics, São Leopoldo Mandic College, Campinas 13045-755, Brazil
| | - Tábata R B Carvalho
- Department of Orthodontics, São Leopoldo Mandic College, Campinas 13045-755, Brazil
| | - Leonardo S Alexandre
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos 13566-590, Brazil
- The National Institute of Science and Technology in Bioanalyses, INCTBio, Campinas 13083-970, Brazil
| | - Vinícius G Ferreira
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos 13566-590, Brazil
- The National Institute of Science and Technology in Bioanalyses, INCTBio, Campinas 13083-970, Brazil
| | - Lucas B Doretto
- Department of Structural and Functional Biology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 01049-010, Brazil
| | - Beatriz M Souza
- Department of Structural and Functional Biology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 01049-010, Brazil
| | - Rafael T Nakajima
- Department of Structural and Functional Biology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 01049-010, Brazil
| | - Patrick da Silva
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Ana P Barbosa
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Leticia Gomes-de-Pontes
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Camila G Bomfim
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | | | - Antonio Condino-Neto
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Cristiane R Guzzo
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Jean P S Peron
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Magaiver Andrade-Silva
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Niels O S Câmara
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | - Anali M B Garnique
- Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo 05508-220, Brazil
| | | | | | - Leonardo J G Barcellos
- Laboratório de Fisiologia de Peixes, Programa de Pós-Graduação em Bioexperimentação, Escola de Ciências Agrárias, Inovação e Negócios, Universidade de Passo Fundo, Passo Fundo 99052-900, Brazil
| | - Jose D Correia-Junior
- Institute of Biomedical Sciences, Federal University Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Jorge Galindo-Villegas
- Department of Genomics, Faculty of Biosciences and Aquaculture, Nord University, 8026 Bodø, Norway
| | - Mônica F R Machado
- Biological Sciences Special Academic Unit, Federal University of Jatai, Jatai 75804-020, Brazil
| | - Angela Castoldi
- Keizo Asami Institute, Federal University of Pernambuco, Recife 50670-901, Brazil
| | - Susana L Oliveira
- School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal 14884-900, Brazil
| | - Camila C Costa
- School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal 14884-900, Brazil
| | - Marco A A Belo
- School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal 14884-900, Brazil
| | - Giovane Galdino
- Institute of Motricity Sciences, Department of Physical Therapy, Federal University of Alfenas, Alfenas 37133-840, Brazil
| | - Germán G Sgro
- Departamento de Ciências Biomoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo 14040-900, Brazil
| | - Natalia F Bueno
- Integrated Structural Biology Platform, Carlos Chagas Institute, FIOCRUZ Paraná, Curitiba 81310-020, Brazil
| | - Silas F Eto
- Center of Innovation and Development, Laboratory of Development and Innovation Butantan Institute, São Paulo 69310-000, Brazil
| | - Flávio P Veras
- Faculty of Medicine, University of São Paulo (USP), Ribeirão Preto 14040-900, Brazil
| | - Bianca H V Fernandes
- Laboratory of Genetic and Sanitary Control, Technical Board of Support for Teaching and Research, Faculty of Medicine, University of Sao Paulo, São Paulo 01246-903, Brazil
| | - Paulo R S Sanches
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, Brazil
| | - Eduardo M Cilli
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, Brazil
| | - Guilherme Malafaia
- Laboratory of Toxicology Applied to the Environment, Goiano Federal Institute, Urutaí Campus, Urutaí 75790-000, Brazil
| | - Rafael H Nóbrega
- Department of Structural and Functional Biology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu 01049-010, Brazil
| | - Aguinaldo S Garcez
- Department of Orthodontics, São Leopoldo Mandic College, Campinas 13045-755, Brazil
| | - Emanuel Carrilho
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos 13566-590, Brazil
- The National Institute of Science and Technology in Bioanalyses, INCTBio, Campinas 13083-970, Brazil
| | - Ives Charlie-Silva
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, Brazil
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5
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Cilli EM, Costa NC, Santos-Filho NA, Piccoli JP, Fusco-Almeida AM, Santos CT, de Souza JO, Zanini CL, Aguiar ACC, Oliva G, Guido RVC. New strategies for novel drugs: antimicrobial peptides containing ferrocene with improved antifungal and antiplasmodial biological activity. Protein Pept Lett 2022; 29:1088-1098. [DOI: 10.2174/0929866529666220929162509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 11/22/2022]
Abstract
Background:
Fungal and parasitic diseases are global health problems and the available treatments are becoming ineffective, mainly due to the emergence of resistant strains of pathogens. Furthermore, the drugs currently in use exhibit high toxicity and side effects. The scarcity of efficient treatments for fungal and parasitic diseases has motivated the search for new drug candidates including antimicrobial peptides. The chemokine class RP1 peptide shows inhibitory activity against bacteria, viruses, cancer cells and parasites. In addition, the organometallic compound ferrocene showed antiparasitic activity. Thus, the objective of this study was to assess the effect of conjugation of the RP1 peptide with ferrocene in terms of its structure, biological activity against fungi and parasites and toxicity.
Methods:
Peptides and conjugates were synthesized using solid phase peptide synthesis (SPPS). The Fc-RP1 peptide showed antifungal and antimalarial activities with low toxicity in the U87 and HepG2 cell lines.
Results:
The mechanism of action of these peptides, analyzed by flow cytometry in the fungus Cryptococcus neoformans, was through membrane permeabilization, with an emphasis on the Fc-RP1 peptide that presented the highest rate of PI-positive cell marking.
Conclusion:
In conclusion, ferrocene conjugated to antimicrobial peptide RP1 is an attractive biomolecule for drug discovery against fungal and parasitic diseases.
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Affiliation(s)
- Eduardo M. Cilli
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Brazil
| | - Natalia C.S. Costa
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Brazil
| | - Norival A. Santos-Filho
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Brazil
| | - Julia P. Piccoli
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Brazil
| | - Ana M. Fusco-Almeida
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Brazil
| | - Claudia T. Santos
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Brazil
| | | | - Camila L. Zanini
- São Carlos Institute of Physics, University of Sao Paulo (USP), Brazil
| | | | - Glaucius Oliva
- São Carlos Institute of Physics, University of Sao Paulo (USP), Brazil
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6
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Castro ACH, Bezerra ÍRS, Pascon AM, da Silva GH, Philot EA, de Oliveira VL, Mancini RSN, Schleder GR, Castro CE, de Carvalho LRS, Fernandes BHV, Cilli EM, Sanches PRS, Santhiago M, Charlie-Silva I, Martinez DST, Scott AL, Alves WA, Lima RS. Modular Label-Free Electrochemical Biosensor Loading Nature-Inspired Peptide toward the Widespread Use of COVID-19 Antibody Tests. ACS Nano 2022; 16:14239-14253. [PMID: 35969505 PMCID: PMC9397565 DOI: 10.1021/acsnano.2c04364] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/11/2022] [Indexed: 05/16/2023]
Abstract
Limitations of the recognition elements in terms of synthesis, cost, availability, and stability have impaired the translation of biosensors into practical use. Inspired by nature to mimic the molecular recognition of the anti-SARS-CoV-2 S protein antibody (AbS) by the S protein binding site, we synthesized the peptide sequence of Asn-Asn-Ala-Thr-Asn-COOH (abbreviated as PEP2003) to create COVID-19 screening label-free (LF) biosensors based on a carbon electrode, gold nanoparticles (AuNPs), and electrochemical impedance spectroscopy. The PEP2003 is easily obtained by chemical synthesis, and it can be adsorbed on electrodes while maintaining its ability for AbS recognition, further leading to a sensitivity 3.4-fold higher than the full-length S protein, which is in agreement with the increase in the target-to-receptor size ratio. Peptide-loaded LF devices based on noncovalent immobilization were developed by affording fast and simple analyses, along with a modular functionalization. From studies by molecular docking, the peptide-AbS binding was found to be driven by hydrogen bonds and hydrophobic interactions. Moreover, the peptide is not amenable to denaturation, thus addressing the trade-off between scalability, cost, and robustness. The biosensor preserves 95.1% of the initial signal for 20 days when stored dry at 4 °C. With the aid of two simple equations fitted by machine learning (ML), the method was able to make the COVID-19 screening of 39 biological samples into healthy and infected groups with 100.0% accuracy. By taking advantage of peptide-related merits combined with advances in surface chemistry and ML-aided accuracy, this platform is promising to bring COVID-19 biosensors into mainstream use toward straightforward, fast, and accurate analyses at the point of care, with social and economic impacts being achieved.
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Affiliation(s)
- Ana C. H. Castro
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Ítalo R. S. Bezerra
- Brazilian Nanotechnology National Laboratory,
Brazilian Center for Research in Energy and Materials,
Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Aline M. Pascon
- Brazilian Nanotechnology National Laboratory,
Brazilian Center for Research in Energy and Materials,
Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Gabriela H. da Silva
- Brazilian Nanotechnology National Laboratory,
Brazilian Center for Research in Energy and Materials,
Campinas, São Paulo 13083-970, Brazil
| | - Eric A. Philot
- Center for Mathematics, Computing and Cognition,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Vivian L. de Oliveira
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
- Laboratory of Immunology, Heart Institute,
University of São Paulo, São Paulo, São
Paulo 05508-000, Brazil
| | - Rodrigo S. N. Mancini
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Gabriel R. Schleder
- John A. Paulson School of Engineering and Applied
Sciences, Harvard University, Cambridge, Massachusetts 02138,
United States
| | - Carlos E. Castro
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | | | | | - Eduardo M. Cilli
- Institute of Chemistry, São Paulo
State University, Araraquara, São Paulo 14800-900,
Brazil
| | - Paulo R. S. Sanches
- Institute of Chemistry, São Paulo
State University, Araraquara, São Paulo 14800-900,
Brazil
| | - Murilo Santhiago
- Brazilian Nanotechnology National Laboratory,
Brazilian Center for Research in Energy and Materials,
Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Ives Charlie-Silva
- Institute of Biomedical Sciences,
University of São Paulo, São Paulo, São
Paulo 05508-000, Brazil
| | - Diego S. T. Martinez
- Brazilian Nanotechnology National Laboratory,
Brazilian Center for Research in Energy and Materials,
Campinas, São Paulo 13083-970, Brazil
| | - Ana L. Scott
- Center for Mathematics, Computing and Cognition,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Wendel A. Alves
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
| | - Renato S. Lima
- Brazilian Nanotechnology National Laboratory,
Brazilian Center for Research in Energy and Materials,
Campinas, São Paulo 13083-970, Brazil
- Center for Natural and Human Sciences,
Federal University of ABC, Santo André, São
Paulo 09210-580, Brazil
- Institute of Chemistry, University of
Campinas, Campinas, São Paulo 13083-970,
Brazil
- São Carlos Institute of Chemistry,
University of São Paulo, São Carlos, São
Paulo 09210-580, Brazil
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7
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Malafaia G, Ahmed MAI, Souza SSD, Rezende FNE, Freitas ÍN, da Luz TM, da Silva AM, Charlie-Silva I, Braz HLB, Jorge RJB, Sanches PRS, Mendonça-Gomes JM, Cilli EM, Araújo APDC. Toxicological impact of SARS-CoV-2 on the health of the neotropical fish, Poecilia reticulata. Aquat Toxicol 2022; 245:106104. [PMID: 35176694 PMCID: PMC8830931 DOI: 10.1016/j.aquatox.2022.106104] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 01/19/2022] [Accepted: 01/27/2022] [Indexed: 05/12/2023]
Abstract
There have been significant impacts of the current COVID-19 pandemic on society including high health and economic costs. However, little is known about the potential ecological risks of this virus despite its presence in freshwater systems. In this study, we aimed to evaluate the exposure of Poecilia reticulata juveniles to two peptides derived from Spike protein of SARS-CoV-2, which was synthesized in the laboratory (named PSPD-2002 and PSPD-2003). For this, the animals were exposed for 35 days to the peptides at a concentration of 40 µg/L and different toxicity biomarkers were assessed. Our data indicated that the peptides were able to induce anxiety-like behavior in the open field test and increased acetylcholinesterase (AChE) activity. The biometric evaluation also revealed that the animals exposed to the peptides displayed alterations in the pattern of growth/development. Furthermore, the increased activity of superoxide dismutase (SOD) and catalase (CAT) enzymes were accompanied by increased levels of malondialdehyde (MDA), reactive oxygen species (ROS) and hydrogen peroxide (H2O2), which suggests a redox imbalance induced by SARS-CoV-2 spike protein peptides. Moreover, molecular docking analysis suggested a strong interaction of the peptides with the enzymes AChE, SOD and CAT, allowing us to infer that the observed effects are related to the direct action of the peptides on the functionality of these enzymes. Consequently, our study provided evidence that the presence of SARS-CoV-2 viral particles in the freshwater ecosystems offer a health risk to fish and other aquatic organisms.
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Affiliation(s)
- Guilherme Malafaia
- Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí Campus, Rodovia Geraldo Silva Nascimento, 2,5km, Zona Rural CEP, Urutaí, GO 75790-000, Brazil; Post-Graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Post-Graduation Program in Ecology and Conservation of Natural Resources, Federal University of Uberlândia, Uberlândia MG, Brazil.
| | | | - Sindoval Silva de Souza
- Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí Campus, Rodovia Geraldo Silva Nascimento, 2,5km, Zona Rural CEP, Urutaí, GO 75790-000, Brazil
| | - Fernanda Neves Estrela Rezende
- Post-Graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil
| | - Ítalo Nascimento Freitas
- Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí Campus, Rodovia Geraldo Silva Nascimento, 2,5km, Zona Rural CEP, Urutaí, GO 75790-000, Brazil
| | - Thiarlen Marinho da Luz
- Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí Campus, Rodovia Geraldo Silva Nascimento, 2,5km, Zona Rural CEP, Urutaí, GO 75790-000, Brazil
| | - Abner Marcelino da Silva
- Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí Campus, Rodovia Geraldo Silva Nascimento, 2,5km, Zona Rural CEP, Urutaí, GO 75790-000, Brazil
| | - Ives Charlie-Silva
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | - Helyson Lucas Bezerra Braz
- Drug Research and Development Center, Federal University of Ceará, CE, Brazil; Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, CE, Brazil
| | - Roberta Jeane Bezerra Jorge
- Drug Research and Development Center, Federal University of Ceará, CE, Brazil; Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, CE, Brazil
| | - Paulo R S Sanches
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | | | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
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8
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Vignoli Muniz GS, Duarte EL, Lorenzón EN, Cilli EM, Lamy MT. What different physical techniques can disclose about disruptions on membrane structure caused by the antimicrobial peptide Hylin a1 and a more positively charged analogue. Chem Phys Lipids 2022; 243:105173. [PMID: 34995561 DOI: 10.1016/j.chemphyslip.2022.105173] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 10/05/2021] [Revised: 12/15/2021] [Accepted: 01/02/2022] [Indexed: 11/28/2022]
Abstract
The present work monitors structural changes in anionic membranes (DPPG; 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-rac-glycerol)) caused by the native antimicrobial peptide (AMP) Hylin a1 (Hya1; IFGAILPLALGALKNLIK-NH2) and its synthetic analogue K0Hya1 (KIFGAILPLALGALKNLIK-NH2), with an extra positive residue of lysine at the N-terminus of the peptide chain. Anionic membranes were used to mimic anionic lipids in bacteria membranes. Differential scanning calorimetry (DSC) evinced that both peptides strongly disrupt the lipid bilayers. However, whereas the native peptide (+3) induces a space-average and/or time-average disruption on DPPG bilayers, the more charged, K0Hya1 (+4), appears to be strongly attached to the membrane, clearly giving rise to the coexistence of two different lipid regions, one depleted of peptide and another one peptide-disrupted. The membrane fluorescent probe Laurdan indicates that, in average, the peptides increase the bilayer packing of fluid DPPG (above the lipid gel-fluid transition temperature) and/or decrease its polarity. Spin labels, incorporated into DPPG membrane, confirm, and extend the results obtained with Laurdan, indicating that the peptides increase the lipid packing both in gel and fluid DPPG bilayers. Therefore, our results confirm that Laurdan is often unable to monitor structural modifications induced on gel membranes by exogenous molecules. Through the measurement of the leakage of entrapped carboxyfluorescein (CF), a fluorescent dye, in DPPG large unilamellar vesicles it was possible to show that both peptides induce pore formation in DPPG bilayers. Furthermore, CF experiments show that Hylin peptides are strongly bound to DPPG bilayers in the gel phase, not being able to migrate to other DPPG vesicles. Here we discuss the complementarity of different techniques in monitoring structural alterations caused on lipid bilayers by Hylin peptides, and how it could be used to help in the understanding of the action of other exogenous molecules on biological membranes.
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Affiliation(s)
- Gabriel S Vignoli Muniz
- Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, 05508-090 São Paulo, SP, Brazil.
| | - Evandro L Duarte
- Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, 05508-090 São Paulo, SP, Brazil
| | - Esteban N Lorenzón
- Unidade Acadêmica Especial Ciências da Saúde, Universidade Federal de Jataí, 75804-020, Jataí, GO, Brazil
| | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual Paulista, Araraquara, 14800-900, SP,,Brazil
| | - M Teresa Lamy
- Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, 05508-090 São Paulo, SP, Brazil.
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9
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Mendonça-Gomes JM, Charlie-Silva I, Guimarães ATB, Estrela FN, Calmon MF, Miceli RN, Sanches PRS, Bittar C, Rahal P, Cilli EM, Ahmed MAI, Vogel CFA, Malafaia G. Shedding light on toxicity of SARS-CoV-2 peptides in aquatic biota: A study involving neotropical mosquito larvae (Diptera: Culicidae). Environ Pollut 2021; 289:117818. [PMID: 34333265 PMCID: PMC8291650 DOI: 10.1016/j.envpol.2021.117818] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/21/2021] [Accepted: 07/19/2021] [Indexed: 05/19/2023]
Abstract
Knowledge about how the COVID-19 pandemic can affect aquatic wildlife is still extremely limited, and no effect of SARS-CoV-2 or its structural constituents on invertebrate models has been reported so far. Thus, we investigated the presence of the 2019-new coronavirus in different urban wastewater samples and, later, evaluated the behavioral and biochemical effects of the exposure of Culex quinquefasciatus larvae to two SARS-CoV-2 spike protein peptides (PSPD-2002 and PSPD-2003) synthesized in our laboratory. Initially, our results show the contamination of wastewater by the new coronavirus, via RT-qPCR on the viral N1 gene. On the other hand, our study shows that short-term exposure (48 h) to a low concentration (40 μg/L) of the synthesized peptides induced changes in the locomotor and the olfactory-driven behavior of the C. quinquefascitus larvae, which were associated with increased production of ROS and AChE activity (cholinesterase effect). To our knowledge, this is the first study that reports the indirect effects of the COVID-19 pandemic on the larval phase of a freshwater invertebrate species. The results raise concerns at the ecological level where the observed biological effects may lead to drastic consequences.
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Affiliation(s)
| | - Ives Charlie-Silva
- Departamento de Farmacologia, Instituto de Ciências Biomédicas, Universidade de São Paulo; São Paulo, SP, Brazil
| | | | - Fernanda Neves Estrela
- Programa de Pós-Graduação Em Conservação de Recursos Naturais do Cerrado, Instituto Federal Goiano; Urutaí, GO, Brazil
| | - Marilia Freitas Calmon
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"; São José do Rio Preto, SP, Brazil
| | - Rafael Nava Miceli
- SeMAE - Serviço Municipal Autonômo de Água e Esgoto, São José do Rio Preto; São Paulo, SP, Brazil
| | - Paulo R S Sanches
- Instituto de Química, Universidade Estadual Paulista; Araraquara, SP, Brazil
| | - Cíntia Bittar
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"; São José do Rio Preto, SP, Brazil
| | - Paula Rahal
- Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"; São José do Rio Preto, SP, Brazil
| | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual Paulista; Araraquara, SP, Brazil
| | | | - Christoph F A Vogel
- Department of Environmental Toxicology and Center for Health and the Environment, University of California, Davis, CA, 95616, USA
| | - Guilherme Malafaia
- Programa de Pós-Graduação Em Conservação de Recursos Naturais do Cerrado, Instituto Federal Goiano; Urutaí, GO, Brazil; Programa de Pós-Graduação Em Biotecnologia e Biodiversidade, Universidade Federal de Goiás, Goiânia, GO, Brazil; Programa de Pós-Graduação Em Ecologia e Conservação de Recursos Naturais, Universidade Federal de Uberlância, Uberlândia, MG, Brazil.
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10
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Bittar C, Possebon FS, Ullmann LS, Geraldini DB, da Costa VG, de Almeida LGP, da S Sanches PR, Nascimento-Júnior NM, Cilli EM, Artico Banho C, Campos GRF, Ferreira HL, Sacchetto L, da Silva GCD, Parra MCP, Moraes MM, da Costa PI, Vasconcelos ATR, Spilki FR, Nogueira ML, Rahal P, Araujo JP. The Emergence of the New P.4 Lineage of SARS-CoV-2 With Spike L452R Mutation in Brazil. Front Public Health 2021; 9:745310. [PMID: 34660520 PMCID: PMC8517261 DOI: 10.3389/fpubh.2021.745310] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/07/2021] [Indexed: 12/28/2022] Open
Abstract
The emergence of several SARS-CoV-2 lineages presenting adaptive mutations is a matter of concern worldwide due to their potential ability to increase transmission and/or evade the immune response. While performing epidemiological and genomic surveillance of SARS-CoV-2 in samples from Porto Ferreira—São Paulo—Brazil, we identified sequences classified by pangolin as B.1.1.28 harboring Spike L452R mutation, in the RBD region. Phylogenetic analysis revealed that these sequences grouped into a monophyletic branch, with others from Brazil, mainly from the state of São Paulo. The sequences had a set of 15 clade defining amino acid mutations, of which six were in the Spike protein. A new lineage was proposed to Pango and it was accepted and designated P.4. In samples from the city of Porto Ferreira, P.4 lineage has been increasing in frequency since it was first detected in March 2021, corresponding to 34.7% of the samples sequenced in June, the second in prevalence after P.1. Also, it is circulating in 30 cities from the state of São Paulo, and it was also detected in one sample from the state of Sergipe and two from the state of Rio de Janeiro. Further studies are needed to understand whether P.4 should be considered a new threat.
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Affiliation(s)
- Cíntia Bittar
- Laboratório de Estudos Genômicos, Departamento de Biologia, Instituto de Biociências Letras e Ciências Exatas (IBILCE), Universidade Estadual Paulista (Unesp), São José do Rio Preto, Brazil
| | - Fábio Sossai Possebon
- Instituto de Biotecnologia, Universidade Estadual Paulista (Unesp), Botucatu, Brazil
| | - Leila Sabrina Ullmann
- Instituto de Biotecnologia, Universidade Estadual Paulista (Unesp), Botucatu, Brazil
| | - Dayla Bott Geraldini
- Laboratório de Estudos Genômicos, Departamento de Biologia, Instituto de Biociências Letras e Ciências Exatas (IBILCE), Universidade Estadual Paulista (Unesp), São José do Rio Preto, Brazil
| | - Vivaldo G da Costa
- Laboratório de Estudos Genômicos, Departamento de Biologia, Instituto de Biociências Letras e Ciências Exatas (IBILCE), Universidade Estadual Paulista (Unesp), São José do Rio Preto, Brazil
| | - Luiz G P de Almeida
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica (LNCC), Petrópolis, Brazil
| | - Paulo Ricardo da S Sanches
- Laboratório de Síntese e Estudos de Biomoléculas (LaSEBio), Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista (Unesp), Araraquara, Brazil
| | - Nailton M Nascimento-Júnior
- Laboratório de Química Medicinal, Síntese Orgânica e Modelagem Molecular (LaQMedSOMM), Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista (Unesp), Araraquara, Brazil
| | - Eduardo M Cilli
- Laboratório de Síntese e Estudos de Biomoléculas (LaSEBio), Departamento de Bioquímica e Química Orgânica, Instituto de Química, Universidade Estadual Paulista (Unesp), Araraquara, Brazil
| | - Cecília Artico Banho
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Guilherme R F Campos
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Helena Lage Ferreira
- Laboratório de Medicina Veterinária Preventiva Aplicada, Departamento de Medicina Veterinária, Faculdade de Zootecnia e Engenharia de Alimentos (FZEA), Universidade de São Paulo (USP), Pirassununga, Brazil
| | - Lívia Sacchetto
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Gislaine C D da Silva
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Maisa C P Parra
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Marília M Moraes
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Paulo Inácio da Costa
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas (FCFAR), Universidade Estadual Paulista (Unesp), Araraquara, Brazil
| | - Ana Tereza R Vasconcelos
- Laboratório de Bioinformática, Laboratório Nacional de Computação Científica (LNCC), Petrópolis, Brazil
| | - Fernando Rosado Spilki
- Laboratório de Microbiologia Molecular, Instituto de Ciências da Saúde, Universidade Feevale, Novo Hamburgo, Brazil
| | - Maurício L Nogueira
- Laboratório de Pesquisas em Virologia (LPV), Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil
| | - Paula Rahal
- Laboratório de Estudos Genômicos, Departamento de Biologia, Instituto de Biociências Letras e Ciências Exatas (IBILCE), Universidade Estadual Paulista (Unesp), São José do Rio Preto, Brazil
| | - João Pessoa Araujo
- Instituto de Biotecnologia, Universidade Estadual Paulista (Unesp), Botucatu, Brazil
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11
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Charlie-Silva I, Araújo APC, Guimarães ATB, Veras FP, Braz HLB, de Pontes LG, Jorge RJB, Belo MAA, Fernandes BHV, Nóbrega RH, Galdino G, Condino-Neto A, Galindo-Villegas J, Machado-Santelli GM, Sanches PRS, Rezende RM, Cilli EM, Malafaia G. Toxicological insights of Spike fragments SARS-CoV-2 by exposure environment: A threat to aquatic health? J Hazard Mater 2021; 419:126463. [PMID: 34216962 PMCID: PMC8226002 DOI: 10.1016/j.jhazmat.2021.126463] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 05/26/2021] [Accepted: 06/21/2021] [Indexed: 05/06/2023]
Abstract
The Spike protein (S protein) is a critical component in the infection of the new coronavirus (SARS-CoV-2). The objective of this work was to evaluate whether peptides from S protein could cause negative impact in the aquatic animals. The aquatic toxicity of SARS-CoV-2 Spike protein peptides derivatives has been evaluated in tadpoles (n = 50 tadpoles/5 replicates of 10 animals) from species Physalaemus cuvieri (Leptodactylidae). After synthesis, purification, and characterization of peptides (PSDP2001, PSDP2002, PSDP2003) an aquatic contamination has been simulated with these peptides during 24 h of exposure in two concentrations (100 and 500 ng/mL). The control group ("C") was composed of tadpoles kept in polyethylene containers containing de-chlorinated water. Oxidative stress, antioxidant biomarkers and AChE activity were assessed. In both concentrations, PSPD2002 and PSPD2003 increased catalase and superoxide dismutase antioxidants enzymes activities, as well as oxidative stress (nitrite levels, hydrogen peroxide and reactive oxygen species). All three peptides also increased acetylcholinesterase activity in the highest concentration. These peptides showed molecular interactions in silico with acetylcholinesterase and antioxidant enzymes. Aquatic particle contamination of SARS-CoV-2 has cholinesterasic effect in P. cuvieri tadpoles. These findings indicate that the COVID-19 can constitute environmental impact or biological damage potential.
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Affiliation(s)
- Ives Charlie-Silva
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | - Amanda P C Araújo
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urata Campus, GO, Brazil
| | - Abraão T B Guimarães
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urata Campus, GO, Brazil
| | - Flávio P Veras
- Center of Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Helyson L B Braz
- Postgraduate Program in Morphological Science, Department of Morphology, School of Medicine, Federal University of Ceara, Delmiro de Farias St., 60.430-170 Fortaleza, CE, Brazil
| | - Letícia G de Pontes
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | - Roberta J B Jorge
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceara, Coronel Nunes de Melo St., 1127, 60.430-275 Fortaleza, CE, Brazil; Drug Research and Development Center, Federal University of Ceara, Coronel Nunes de Melo St., 1000, 60.430-275 Fortaleza, CE, Brazil
| | - Marco A A Belo
- Laboratory of Animal Pharmacology and Toxicology, Brazil University, Descalvado, SP, Brazil; Department of Preventive Veterinary Medicine, São Paulo State University (UNESP), Jaboticabal, SP, Brazil
| | - Bianca H V Fernandes
- Laboratório de Controle Genético e Sanitário, Diretoria Técnica de Apoio ao Ensino e Pesquisa, Faculdade de Medicina da Universidade de São Paulo, Brazil
| | - Rafael H Nóbrega
- Reproductive and Molecular Biology Group, Institute of Biosciences, São Paulo State University, Botucatu, SP, Brazil
| | - Giovane Galdino
- Institute of Motricity Sciences, Federal University of Alfenas, Alfenas, MG, Brazil
| | - Antônio Condino-Neto
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | | | | | - Paulo R S Sanches
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara SP, Brazil
| | - Rafael M Rezende
- Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, Boston, United States
| | - Eduardo M Cilli
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara SP, Brazil
| | - Guilherme Malafaia
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urata Campus, GO, Brazil.
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12
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Freire MCLC, Noske GD, Bitencourt NV, Sanches PRS, Santos-Filho NA, Gawriljuk VO, de Souza EP, Nogueira VHR, de Godoy MO, Nakamura AM, Fernandes RS, Godoy AS, Juliano MA, Peres BM, Barbosa CG, Moraes CB, Freitas-Junior LHG, Cilli EM, Guido RVC, Oliva G. Non-Toxic Dimeric Peptides Derived from the Bothropstoxin-I Are Potent SARS-CoV-2 and Papain-like Protease Inhibitors. Molecules 2021; 26:molecules26164896. [PMID: 34443484 PMCID: PMC8401042 DOI: 10.3390/molecules26164896] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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: 03/26/2021] [Revised: 08/05/2021] [Accepted: 08/07/2021] [Indexed: 12/24/2022] Open
Abstract
The COVID-19 outbreak has rapidly spread on a global scale, affecting the economy and public health systems throughout the world. In recent years, peptide-based therapeutics have been widely studied and developed to treat infectious diseases, including viral infections. Herein, the antiviral effects of the lysine linked dimer des-Cys11, Lys12,Lys13-(pBthTX-I)2K ((pBthTX-I)2K)) and derivatives against SARS-CoV-2 are reported. The lead peptide (pBthTX-I)2K and derivatives showed attractive inhibitory activities against SARS-CoV-2 (EC50 = 28–65 µM) and mostly low cytotoxic effect (CC50 > 100 µM). To shed light on the mechanism of action underlying the peptides’ antiviral activity, the Main Protease (Mpro) and Papain-Like protease (PLpro) inhibitory activities of the peptides were assessed. The synthetic peptides showed PLpro inhibition potencies (IC50s = 1.0–3.5 µM) and binding affinities (Kd = 0.9–7 µM) at the low micromolar range but poor inhibitory activity against Mpro (IC50 > 10 µM). The modeled binding mode of a representative peptide of the series indicated that the compound blocked the entry of the PLpro substrate toward the protease catalytic cleft. Our findings indicated that non-toxic dimeric peptides derived from the Bothropstoxin-I have attractive cellular and enzymatic inhibitory activities, thereby suggesting that they are promising prototypes for the discovery and development of new drugs against SARS-CoV-2 infection.
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Affiliation(s)
- Marjorie C. L. C. Freire
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Gabriela D. Noske
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Natália V. Bitencourt
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, SP, Brazil; (N.V.B.); (P.R.S.S.); (N.A.S.-F.); (E.M.C.)
| | - Paulo R. S. Sanches
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, SP, Brazil; (N.V.B.); (P.R.S.S.); (N.A.S.-F.); (E.M.C.)
| | - Norival A. Santos-Filho
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, SP, Brazil; (N.V.B.); (P.R.S.S.); (N.A.S.-F.); (E.M.C.)
| | - Victor O. Gawriljuk
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Eduardo P. de Souza
- Department of Genetics and Evolution, Federal University of São Carlos, Rodovia Washington Luís km 235, São Carlos 13565-905, SP, Brazil;
| | - Victor H. R. Nogueira
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Mariana O. de Godoy
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Aline M. Nakamura
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Rafaela S. Fernandes
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Andre S. Godoy
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
| | - Maria A. Juliano
- The Sao Paulo School of Medicine, Federal University of São Paulo, Rua Três de Maio, 100, São Paulo 04044-020, SP, Brazil;
| | - Bianca M. Peres
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1374, São Paulo 05508-900, SP, Brazil; (B.M.P.); (C.G.B.); (L.H.G.F.-J.)
| | - Cecília G. Barbosa
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1374, São Paulo 05508-900, SP, Brazil; (B.M.P.); (C.G.B.); (L.H.G.F.-J.)
| | - Carolina B. Moraes
- Department of Pharmaceutical Sciences, Federal University of São Paulo, Rua São Nicolau, 210, Diadema 09913-030, SP, Brazil;
| | - Lucio H. G. Freitas-Junior
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1374, São Paulo 05508-900, SP, Brazil; (B.M.P.); (C.G.B.); (L.H.G.F.-J.)
| | - Eduardo M. Cilli
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, SP, Brazil; (N.V.B.); (P.R.S.S.); (N.A.S.-F.); (E.M.C.)
| | - Rafael V. C. Guido
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
- Correspondence: (R.V.C.G.); (G.O.); Tel.: +55-16-3373-8673 (R.V.C.G.); +55-16-3373-6664 (G.O.)
| | - Glaucius Oliva
- São Carlos Institute of Physics, University of Sao Paulo, Avenida João Dagnone, 1100, São Carlos 13563-120, SP, Brazil; (M.C.L.C.F.); (G.D.N.); (V.O.G.); (V.H.R.N.); (M.O.d.G.); (A.M.N.); (R.S.F.); (A.S.G.)
- Correspondence: (R.V.C.G.); (G.O.); Tel.: +55-16-3373-8673 (R.V.C.G.); +55-16-3373-6664 (G.O.)
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13
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Assane IM, Santos-Filho NA, de Sousa EL, de Arruda Brasil MCO, Cilli EM, Pilarski F. Cytotoxicity and antimicrobial activity of synthetic peptides alone or in combination with conventional antimicrobials against fish pathogenic bacteria. J Appl Microbiol 2021; 131:1762-1774. [PMID: 33742508 DOI: 10.1111/jam.15080] [Citation(s) in RCA: 3] [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: 10/14/2020] [Revised: 03/04/2021] [Accepted: 03/17/2021] [Indexed: 12/11/2022]
Abstract
AIMS This study aimed to evaluate the in vitro cytotoxicity and efficacy of synthetic host defence peptides (HDPs), alone or in combination with florfenicol (FFC), oxytetracycline (OTC) or thiamphenicol (TAP), against different pathogenic bacteria isolated from diseased fish. METHODS AND RESULTS Solid-phase synthesis, purification and characterization of several HDPs were performed manually, using the fluorenylmethyloxycarbonyl protecting group in different resins and via high-performance liquid chromatography-mass spectrometry, respectively. The in vitro cytotoxicity and antimicrobial activity of HDPs, FFC, OTC and TAP against Nile tilapia red blood cells (RBCs) and relevant fish pathogenic bacteria (Aeromonas, Citrobacter, Edwardsiella, Streptococcus, Lactococcus and Vibrio) was determined using the haemolysis assay and broth microdilution method, respectively. The checkerboard assay was used to evaluate the synergy between the most active HDPs and other antimicrobials against the tested strains. MUC 7 12-mer, FFC, OTC and TAP were not cytotoxic to Nile tilapia RBCs, in all tested concentrations. LL-37, (p-BthTX-I)2 and Hylin-a1 were not cytotoxic at concentrations up to 78·13, 19·53 and 9·77 μg ml-1 , respectively. HDPs demonstrated potent antimicrobial activity (minimum inhibitory concentration ≤31·25 µg ml-1 ) against Aeromonas jandaei (KR-12-a5), Citrobacter freundii (Kr-12-a5; (p-BthTX-I)2 ; LL-37; and Hylin a1), Streptococcus agalactiae (Hylin a1; (p-BthTX-I)2 and LL-37), Lactococcus garviae (Hylin a1), and Vibrio fluvialis (KR-12-a5). The combinations of (p-BthTX-I)2 with TAP and LL-37 with FFC showed synergistic activity against C. freundii (fractional inhibitory concentration index of 0·25 and 0·50, respectively). CONCLUSIONS Synthetic HDPs have the potential as a good treatment option for bacterial diseases in aquaculture. SIGNIFICANCE AND IMPACT OF THE STUDY The in vivo effectiveness of synthetic HDPs such as KR-12-a5; LL-37; (p-BthTX-I)2 and Hylin a1 can be tested alone or in combination with conventional antimicrobials as a treatment option to reduce the use of antimicrobials in aquaculture.
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Affiliation(s)
- I M Assane
- Laboratory of Microbiology and Parasitology of Aquatic Organisms, São Paulo State University (UNESP), Aquaculture Center of Unesp (Caunesp), São Paulo, Brazil.,Faculdade de Ciências Agrárias, Universidade Zambeze (UniZambeze), Tete, Mozambique
| | - N A Santos-Filho
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), São Paulo, Brazil.,Registro Experimental Campus, São Paulo State University (UNESP), São Paulo, Brazil
| | - E L de Sousa
- Graduate Program in Agricultural and Livestock Microbiology, São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, São Paulo, Brazil
| | - M C O de Arruda Brasil
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), São Paulo, Brazil
| | - E M Cilli
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), São Paulo, Brazil
| | - F Pilarski
- Laboratory of Microbiology and Parasitology of Aquatic Organisms, São Paulo State University (UNESP), Aquaculture Center of Unesp (Caunesp), São Paulo, Brazil.,Graduate Program in Agricultural and Livestock Microbiology, São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, São Paulo, Brazil
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14
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Cespedes GF, Nobre TM, Oliveira ON, Bong D, Cilli EM. On the role of surrounding regions in the fusion peptide in dengue virus infection. Virology 2021; 557:62-69. [PMID: 33667752 DOI: 10.1016/j.virol.2021.02.012] [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: 10/23/2020] [Revised: 02/17/2021] [Accepted: 02/20/2021] [Indexed: 10/22/2022]
Abstract
Dengue virus infection depends on its fusion with the host membrane, where the binding occurs through interaction between proteins on the virus cell surface and specific viral receptors on target membranes. This process is mediated by the fusion peptide located between residues 98 and 112 (DRGWGNGCGLFGKGG) that forms a loop in domain II of dengue E glycoprotein. In this study, we evaluated the role of fusion peptide surrounding regions (88-97 and 113-123) of the Dengue 2 subtype on its interaction with the membrane and fusion activity. These sequences are important to stabilize the fusion peptide loop and increase fusion activity. Three peptides, besides the fusion peptide, were synthesized by SPPS using the Fmoc chemical approach. The first contains the fusion peptide and the C-terminal region of the loop (sequence 98-123); another contains the N-terminal region (88-112) and the larger peptide contains both regions (88-123). The peptides were able to interact with a model membrane. Differences in morphology of the monolayer promoted by the peptides were assessed by Brewster Angle Microscopy (BAM). Our data indicated that the C-terminal region of fusion peptide loop is more efficient in promoting fusion and interacting with the membrane than the N-terminal sequence, which is responsible for the electrostatic initial interaction. We propose a 2-step mechanism for the interaction of the dengue virus fusion peptide with the host membrane, where the N-terminal sequence docks electrostatically on the headgroups and then the C-terminal interacts via hydrophobic forces in the acyl chains.
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Affiliation(s)
- Graziely F Cespedes
- Departamento de Bioquímica e Química Orgânica, Instituto de Química, UNESP -Univ Estadual Paulista, 14800-900, Araraquara, SP, Brazil
| | - Thatyane M Nobre
- Instituto de Física de São Carlos, Universidade de São Paulo, USP, 13560-970, São Carlos, São Paulo, Brazil
| | - Osvaldo N Oliveira
- Instituto de Física de São Carlos, Universidade de São Paulo, USP, 13560-970, São Carlos, São Paulo, Brazil
| | - Dennis Bong
- Department of Chemistry, The Ohio State University, Columbus, OH, 43210, USA
| | - Eduardo M Cilli
- Departamento de Bioquímica e Química Orgânica, Instituto de Química, UNESP -Univ Estadual Paulista, 14800-900, Araraquara, SP, Brazil.
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15
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Piccoli JP, Soares AC, Oliveira ON, Cilli EM. Nanostructured functional peptide films and their application in C-reactive protein immunosensors. Bioelectrochemistry 2020; 138:107692. [PMID: 33291002 DOI: 10.1016/j.bioelechem.2020.107692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 10/25/2020] [Accepted: 10/27/2020] [Indexed: 12/31/2022]
Abstract
Peptides with an active redox molecule are incorporated into nanostructured films for electrochemical biosensors with stable and controllable physicochemical properties. In this study, we synthesized three ferrocene (Fc)-containing peptides with the sequence Fc-Glu-(Ala)n-Cys-NH2, which could form self-assembled monolayers on gold and be attached to antibodies. The peptide with two alanines (n = 2) yielded the immunosensor with the highest performance in detecting C-reactive protein (CRP), a biomarker of inflammation. Using electrochemical impedance-derived capacitive spectroscopy, the limit of detection was 240 pM with a dynamic range that included clinically relevant CRP concentrations. With a combination of electrochemical methods and polarization-modulated infrared reflection-absorption spectroscopy, we identified the chemical groups involved in the antibody-CRP interaction, and were able to relate the highest performance for the peptide with n = 2 to chain length and efficient packing in the organized films. These strategies to design peptides and methods to fabricate the immunosensors are generic, and can be applied to other types of biosensors, including in low cost platforms for point-of-care diagnostics.
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Affiliation(s)
- Julia P Piccoli
- São Carlos Institute of Physics, University of São Paulo, 13566-590 São Carlos - SP, Brazil
| | - Andrey C Soares
- São Carlos Institute of Physics, University of São Paulo, 13566-590 São Carlos - SP, Brazil; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970 São Carlos - SP, Brazil
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo, 13566-590 São Carlos - SP, Brazil.
| | - Eduardo M Cilli
- Institute of Chemistry, São Paulo State University, 14800-060 Araraquara - SP, Brazil.
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16
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Sá JM, Piloto JV, Cilli EM, Tasic L, Fossey MA, Almeida FCL, Souza FP, Caruso ÍP. Hesperetin targets the hydrophobic pocket of the nucleoprotein/phosphoprotein binding site of human respiratory syncytial virus. J Biomol Struct Dyn 2020; 40:2156-2168. [PMID: 33076779 DOI: 10.1080/07391102.2020.1835717] [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] [Indexed: 02/06/2023]
Abstract
The human Respiratory Syncytial Virus (hRSV) is one of the most common causes of acute respiratory diseases such as bronchiolitis and pneumonia in children worldwide. Among the viral proteins, the nucleoprotein (N) stands out for forming the nucleocapsid (NC) that functions as a template for replication and transcription by the viral polymerase complex. The NC/polymerase recognition is mediated by the phosphoprotein (P), which establishes an interaction of its C-terminal residues with a hydrophobic pocket in the N-terminal domain of N (N-NTD). The present study consists of biophysical characterization of N-NTD and investigation of flavonoids binding to this domain using experimental and computational approaches. Saturation transfer difference (STD)-NMR measurements showed that among the investigated flavonoids, only hesperetin (Hst) bound to N-NTD. The binding epitope mapping of Hst suggested that its fused aromatic ring is buried in the protein binding site. STD-NMR and fluorescence anisotropy experiments showed that Hst competes with P protein C-terminal dipeptides for the hRSV nucleoprotein/phosphoprotein (N/P) interaction site in N-NTD, indicating that Hst binds to the hydrophobic pocket in this domain. Computational simulations of molecular docking and dynamics corroborated with experimental results, presenting that Hst established a stable interaction with the N/P binding site. The outcomes presented herein shed light on literature reports that described a significant antireplicative activity of Hst against hRSV, revealing molecular details that can provide the development of a new strategy against this virus.
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Affiliation(s)
- Jéssica M Sá
- Multiuser Center for Biomolecular Innovation (CMIB), Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, CEP, SP, Brazil.,Department of Physics, Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, SP, Brazil
| | - João V Piloto
- Multiuser Center for Biomolecular Innovation (CMIB), Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, CEP, SP, Brazil.,Department of Physics, Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, SP, Brazil
| | - Eduardo M Cilli
- Department of Biochemistry and Organic Chemistry, Instituto de Química, UNESP, Araraquara, SP, Brazil
| | - Ljubica Tasic
- Organic Chemistry Department, Instituto de Química, UNICAMP, Campinas, SP, Brazil
| | - Marcelo A Fossey
- Multiuser Center for Biomolecular Innovation (CMIB), Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, CEP, SP, Brazil.,Department of Physics, Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, SP, Brazil
| | - Fábio C L Almeida
- National Center for Nuclear Magnetic Resonance of Macromolecules, Instituto de Bioquímica Médica Leopoldo de Meis (IBqM) e Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), UFRJ, Rio de Janeiro, RJ, Brazil
| | - Fátima P Souza
- Multiuser Center for Biomolecular Innovation (CMIB), Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, CEP, SP, Brazil.,Department of Physics, Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, SP, Brazil
| | - Ícaro P Caruso
- Multiuser Center for Biomolecular Innovation (CMIB), Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, CEP, SP, Brazil.,Department of Physics, Instituto de Biociências, Letras e Ciências Exatas, UNESP, São José do Rio Preto, SP, Brazil.,National Center for Nuclear Magnetic Resonance of Macromolecules, Instituto de Bioquímica Médica Leopoldo de Meis (IBqM) e Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), UFRJ, Rio de Janeiro, RJ, Brazil
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17
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Costa NCS, Piccoli JP, Santos-Filho NA, Clementino LC, Fusco-Almeida AM, De Annunzio SR, Fontana CR, Verga JBM, Eto SF, Pizauro-Junior JM, Graminha MAS, Cilli EM. Antimicrobial activity of RP-1 peptide conjugate with ferrocene group. PLoS One 2020; 15:e0228740. [PMID: 32214347 PMCID: PMC7098557 DOI: 10.1371/journal.pone.0228740] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 01/21/2020] [Indexed: 12/20/2022] Open
Abstract
Parasitic diseases are a neglected and serious problem, especially in underdeveloped countries. Among the major parasitic diseases, Leishmaniasis figures as an urgent challenge due to its high incidence and severity. At the same time, the indiscriminate use of antibiotics by the population is increasing together with resistance to medicines. To address this problem, new antibiotic-like molecules that directly kill or inhibit the growth of microorganisms are necessary, where antimicrobial peptides (AMPs) can be of great help. In this work, the ferrocene molecule, one active compound with low levels of in vivo toxicity, was coupled to the N-terminus of the RP1 peptide (derived from the human chemokine CXCL4), aiming to evaluate how this change modifies the structure, biological activity, and toxicity of the peptide. The peptide and the conjugate were synthesized using the solid phase peptide synthesis (SPPS). Circular dichroism assays in PBS showed that the RP1 peptide and its conjugate had a typical spectrum for disordered structures. The Fc-RP1 presented anti-amastigote activity against Leishmania amazonensis (IC50 = 0.25 μmol L–1). In comparison with amphotericin B, a second-line drug approved for leishmaniasis treatment, (IC50 = 0.63 μmol L-1), Fc-RP1 was more active and showed a 2.5-fold higher selectivity index. The RP1 peptide presented a MIC of 4.3 μmol L-1 against S. agalactiae, whilst Fc-RP1 was four times more active (MIC = 0.96 μmol L-1), indicating that ferrocene improved the antimicrobial activity against Gram-positive bacteria. The Fc-RP1 peptide also decreased the minimum inhibitory concentration (MIC) in the assays against E. faecalis (MIC = 7.9 μmol L-1), E. coli (MIC = 3.9 μmol L-1) and S. aureus (MIC = 3.9 μmol L-1). The cytotoxicity of the compounds was tested against HaCaT cells, and no significant activity at the highest concentration tested (500 μg. mL-1) was observed, showing the high potential of this new compound as a possible new drug. The coupling of ferrocene also increased the vesicle permeabilization of the peptide, showing a direct relation between high peptide concentration and high carboxyfluorescein release, which indicates the action mechanism by pore formation on the vesicles. Several studies have shown that ferrocene destabilizes cell membranes through lipid peroxidation, leading to cell lysis. It is noteworthy that the Fc-RP1 peptide synthesized here is a prototype of a bioconjugation strategy, but it still is a compound with great biological activity against neglected and fish diseases.
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Affiliation(s)
- Natalia C. S. Costa
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Julia P. Piccoli
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Norival A. Santos-Filho
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Leandro C. Clementino
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Ana M. Fusco-Almeida
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Sarah R. De Annunzio
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Carla R. Fontana
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Juliane B. M. Verga
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Silas F. Eto
- Faculty of Agrarian and Veterinary Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - João M. Pizauro-Junior
- Faculty of Agrarian and Veterinary Sciences, São Paulo State University (UNESP), Araraquara, Brazil
| | - Marcia A. S. Graminha
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, Brazil
- * E-mail: (EMC); (MASG)
| | - Eduardo M. Cilli
- Department of Biochemistry and Technological Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, Brazil
- * E-mail: (EMC); (MASG)
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18
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Cecchetto J, Santos A, Mondini A, Cilli EM, Bueno PR. Serological point-of-care and label-free capacitive diagnosis of dengue virus infection. Biosens Bioelectron 2019; 151:111972. [PMID: 31999580 DOI: 10.1016/j.bios.2019.111972] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 10/21/2019] [Revised: 12/09/2019] [Accepted: 12/15/2019] [Indexed: 12/23/2022]
Abstract
Dengue non-structural protein 1 (NS1 DENV) is considered a biomarker for dengue fever in an early stage. A sensitive and rapid assay for distinguishing positive from negative dengue infection samples is imperative for epidemic control and public health in tropical regions because it enables the development of instantaneous updatable databases and effective surveillance systems. Presently, we successfully report, for the first time, the use of the electrochemical capacitive method for the detection of NS1 DENV biomarker in human serum samples. By using a ferrocene-tagged peptide modified surface containing anti-NS1 as the receptor, it was possible to differentiate positive from negative samples with a p < 0.01 in a reagentless and label-free capacitive format. This capacitive assay had a cut-off of 1.36% (confidence interval of 99.99%); it therefore opens new avenues for developing miniature label-free electrochemical devices for infectious diseases.
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Affiliation(s)
- Juliana Cecchetto
- Institute of Chemistry, São Paulo State University (UNESP), CP 355, 14800-060, Araraquara, São Paulo, Brazil
| | - Adriano Santos
- Institute of Chemistry, São Paulo State University (UNESP), CP 355, 14800-060, Araraquara, São Paulo, Brazil
| | - Adriano Mondini
- Pharmaceutical Faculty, São Paulo State University (UNESP), CP 355, 14800-060, Araraquara, São Paulo, Brazil
| | - Eduardo M Cilli
- Institute of Chemistry, São Paulo State University (UNESP), CP 355, 14800-060, Araraquara, São Paulo, Brazil
| | - Paulo R Bueno
- Institute of Chemistry, São Paulo State University (UNESP), CP 355, 14800-060, Araraquara, São Paulo, Brazil.
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19
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Lorenzon EN, Piccoli JP, Santos-Filho NA, Cilli EM. Dimerization of Antimicrobial Peptides: A Promising Strategy to Enhance Antimicrobial Peptide Activity. Protein Pept Lett 2019; 26:98-107. [PMID: 30605048 PMCID: PMC6416459 DOI: 10.2174/0929866526666190102125304] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [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: 10/17/2018] [Revised: 12/11/2018] [Accepted: 12/26/2018] [Indexed: 01/10/2023]
Abstract
Antimicrobial resistance is a global health problem with strong social and economic impacts. The development of new antimicrobial agents is considered an urgent challenge. In this regard, Antimicrobial Peptides (AMPs) appear to be novel candidates to overcome this problem. The mechanism of action of AMPs involves intracellular targets and membrane disruption. Although the exact mechanism of action of AMPs remains controversial, most AMPs act through membrane disruption of the target cell. Several strategies have been used to improve AMP activity, such as peptide dimerization. In this review, we focus on AMP dimerization, showing many examples of dimerized peptides and their effects on biological activity. Although more studies are necessary to elucidate the relationship between peptide properties and the dimerization effect on antimicrobial activity, dimerization constitutes a promising strategy to improve the effectiveness of AMPs.
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Affiliation(s)
- Esteban N Lorenzon
- Unidade Academica Especial da Saude, Universidade Federal de Jatai, Jatai-GO, Brazil
| | - Julia P Piccoli
- Instituto de Quimica, UNESP- Universidade Estadual Paulista, Araraquara-SP, Brazil
| | - Norival A Santos-Filho
- UNESP- Universidade Estadual Paulista, Campus Experimental de Registro, Registro, Sao Paulo, Brazil
| | - Eduardo M Cilli
- Instituto de Quimica, UNESP- Universidade Estadual Paulista, Araraquara-SP, Brazil
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20
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Caiaffa KS, Basso FG, Santos-Filho NA, de Souza-Costa CA, Sakai VT, Cilli EM, Duque C. Effect of analogues of cationic peptides on dentin mineralization markers in odontoblast-like cells. Arch Oral Biol 2019; 103:19-25. [DOI: 10.1016/j.archoralbio.2019.05.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 05/02/2019] [Accepted: 05/08/2019] [Indexed: 02/07/2023]
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21
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Barbosa SC, Nobre TM, Volpati D, Cilli EM, Correa DS, Oliveira ON. The cyclic peptide labaditin does not alter the outer membrane integrity of Salmonella enterica serovar Typhimurium. Sci Rep 2019; 9:1993. [PMID: 30760803 PMCID: PMC6374527 DOI: 10.1038/s41598-019-38551-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 09/17/2018] [Accepted: 12/27/2018] [Indexed: 12/21/2022] Open
Abstract
Antimicrobial peptides are a promising class of new antibiotics with the ability to kill bacteria by disrupting their cell membrane, which is especially difficult for Gram-negative bacteria whose cell wall contains an outer layer of lipopolysaccharides (LPS). Here we show that the cyclic decapeptide Labaditin (Lo), with proven activity against the Gram-positive Staphylococcus aureus and Streptococcus mutans, is not able to kill the Gram-negative Salmonella enterica serovar Typhimurium (S.e.s. Typhimurium). We found that Lo induced significant changes in the surface pressure isotherms of Langmuir monolayers representing the Salmonella enterica serovar Typhimurium inner membrane (S.e.s. Typhimurium IM), and caused leakage in large unilamellar vesicles made with this IM lipid composition. On the basis of these results one should expect bactericidal activity against S.e.s. Typhimurium. However, Lo could not interact with a monolayer of LPS, causing no significant changes in either the surface pressure isotherms or in the polarization-modulated infrared reflection absorption spectra (PM-IRRAS). Therefore, the failure of Lo to kill S.e.s. Typhimurium is associated with the lack of interaction with LPS from the outer bacteria membrane. Our approach with distinct monolayer compositions and combined techniques to investigate molecular-level interactions is useful for drug design to fight antibiotic-resistant bacteria.
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Affiliation(s)
- Simone C Barbosa
- São Carlos Institute of Physics, University of São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil
| | - Thatyane M Nobre
- São Carlos Institute of Physics, University of São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil
| | | | - Eduardo M Cilli
- Universidade Estadual Paulista (UNESP), Institute of Chemistry, 14800-060, Araraquara-SP, Brazil
| | - Daniel S Correa
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970, São Carlos, SP, Brazil
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil.
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22
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Garrote BL, Fernandes FC, Cilli EM, Bueno PR. Field effect in molecule-gated switches and the role of target-to-receptor size ratio in biosensor sensitivity. Biosens Bioelectron 2019; 127:215-220. [DOI: 10.1016/j.bios.2018.12.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 12/07/2018] [Indexed: 12/28/2022]
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23
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Ros U, Carretero GPB, Paulino J, Crusca E, Pazos F, Cilli EM, Lanio ME, Schreier S, Alvarez C. Self-association and folding in membrane determine the mode of action of peptides from the lytic segment of sticholysins. Biochimie 2018; 156:109-117. [PMID: 30326255 DOI: 10.1016/j.biochi.2018.10.005] [Citation(s) in RCA: 6] [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: 08/08/2018] [Accepted: 10/11/2018] [Indexed: 01/09/2023]
Abstract
Sticholysin I and II (Sts: St I and St II) are proteins of biomedical interest that form pores upon the insertion of their N-terminus in the plasma membrane. Peptides spanning the N-terminal residues of StI (StI1-31) or StII (StII1-30) can mimic the permeabilizing ability of these toxins, emerging as candidates to rationalize their potential biomedical applications. These peptides have different activities that correlate with their hydrophobicity. However, it is not clear how this property contributes to peptide folding in solution or upon binding to membranes. Here we compared the conformational properties of these peptides and shorter versions lacking the hydrophobic segment 1-11 of StI (StI12-31) or 1-10 of StII (StII11-30). Folding of peptides was assessed in solution and in membrane mimetic systems and related with their ability to bind to membranes and to permeabilize lipid vesicles. Our results suggest that the differences in activity among peptides could be ascribed to their different folding propensity and different membrane binding properties. In solution, StII1-30 tends to acquire α-helical conformation coexisting with self-associated structures, while StI1-31 remains structureless. Both peptides fold as α-helix in membrane; but StII1-30 also self-associates in the lipid environment, a process that is favored by its higher affinity for membrane. We stress the contribution of the non-polar/polar balance of the 1-10 amino acid sequence of the peptides as a determining factor for different self-association capabilities. Such difference in hydrophobicity seems to determine the molecular path of peptides folding upon binding to membranes, with an impact in their permeabilizing activity. This study contributes to a better understanding of the molecular mechanisms underlying the permeabilizing activity of Sts N-terminal derived peptides, with connotation for the exploitation of these small molecules as alternative of the full-length toxins in clinical settings.
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Affiliation(s)
- Uris Ros
- Center for Protein Studies, Biology Faculty, University of Havana, Havana, Cuba
| | - Gustavo P B Carretero
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Joana Paulino
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Edson Crusca
- Department of Biochemistry, Institute of Chemistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Fabiola Pazos
- Center for Protein Studies, Biology Faculty, University of Havana, Havana, Cuba
| | - Eduardo M Cilli
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Maria E Lanio
- Center for Protein Studies, Biology Faculty, University of Havana, Havana, Cuba
| | - Shirley Schreier
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Carlos Alvarez
- Center for Protein Studies, Biology Faculty, University of Havana, Havana, Cuba.
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24
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Carretero GPB, Vicente EF, Cilli EM, Alvarez CM, Jenssen H, Schreier S. Dissecting the mechanism of action of actinoporins. Role of the N-terminal amphipathic α-helix in membrane binding and pore activity of sticholysins I and II. PLoS One 2018; 13:e0202981. [PMID: 30161192 PMCID: PMC6117003 DOI: 10.1371/journal.pone.0202981] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 08/13/2018] [Indexed: 11/19/2022] Open
Abstract
Actinoporins sticholysin I and sticholysin II (St I, St II) are proposed to lyse model and biomembranes via toroidal pore formation by their N-terminal domain. Based on the hypothesis that peptide fragments can reproduce the structure and function of this domain, the behavior of peptides containing St I residues 12–31 (StI12-31), St II residues 11–30 (StII11-30), and its TOAC-labeled analogue (N-TOAC-StII11-30) was examined. Molecular modeling showed a good match with experimental structures, indicating amphipathic α-helices in the same regions as in the toxins. CD spectra revealed that the peptides were essentially unstructured in aqueous solution, acquiring α-helical conformation upon interaction with micelles and large unilamellar vesicles (LUV) of variable lipid composition. Fluorescence quenching studies with NBD-containing lipids indicated that N-TOAC-StII11-30’s nitroxide moiety is located in the membranes polar head group region. Pyrene-labeled phospholipid inter-leaflet redistribution suggested that the peptides form toroidal pores, according to the mechanism of action proposed for the toxins. Binding occurred only to negatively charged LUV, indicating the importance of electrostatic interactions; in contrast the peptides bound to both negatively charged and zwitterionic micelles, pointing to a lesser influence of these interactions. In addition, differences between bilayers and micelles in head group packing and in curvature led to differences in peptide-membrane interaction. We propose that the peptides topography in micelles resembles that of the toxins in the toroidal pore. The peptides mimicked the toxins permeabilizing activity, St II peptides being more effective than StI12-31. To our knowledge, this is the first demonstration that differences in the toxins N-terminal amphipathic α-helix play a role in the difference between St I and St II activities.
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Affiliation(s)
- Gustavo P. B. Carretero
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Eduardo F. Vicente
- Faculty of Science and Engineering, State University of São Paulo, Tupã, Brazil
| | - Eduardo M. Cilli
- Institute of Chemistry, State University of São Paulo, Araraquara, Brazil
| | | | - Håvard Jenssen
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Shirley Schreier
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
- * E-mail:
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25
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Magri A, Soler MF, Lopes AM, Cilli EM, Barber PS, Pessoa A, Pereira JFB. A critical analysis of L-asparaginase activity quantification methods-colorimetric methods versus high-performance liquid chromatography. Anal Bioanal Chem 2018; 410:6985-6990. [PMID: 30155702 DOI: 10.1007/s00216-018-1326-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 08/14/2018] [Indexed: 11/26/2022]
Abstract
L-asparaginase or ASNase (L-asparagine aminohydrolase, E.C.3.5.1.1) is an enzyme clinically accepted as an antitumor agent to treat acute lymphoblastic leukemia (ALL) and lymphosarcoma through the depletion of L-asparagine (L-Asn) resulting in cytotoxicity to leukemic cells. ASNase is also important in the food industry, preventing acrylamide formation in processed foods. Several quantification techniques have been developed and used for the measurement of the ASNase activity, but standard pharmaceutical quality control methods were hardly reported, and in general, no official quality control guidelines were defined. To overcome this lack of information and to demonstrate the advantages and limitations, this work properly compares the traditional colorimetric methods (Nessler; L-aspartic acid β-hydroxamate (AHA); and indooxine) and the high-performance liquid chromatography (HPLC) method. A comparison of the methods using pure ASNase shows that the colorimetric methods both overestimate (Nessler) and underestimate (AHA and indooxine) the ASNase activity when compared to the values obtained with HPLC, considered the most precise method as this method monitors both substrate consumption and product formation, allowing for overall mass-balance. Correlation and critical analysis of each method relative to the HPLC method were carried out, resulting in a demonstration that it is crucial to select a proper method for the quantification of ASNase activity, allowing bioequivalence studies and individualized monitoring of different ASNase preparations. Graphical abstract ᅟ.
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Affiliation(s)
- Agnes Magri
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, São Paulo, 14800-903, Brazil
| | - Matheus F Soler
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, São Paulo, 14800-903, Brazil
| | - André M Lopes
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, São Paulo, 14800-903, Brazil
| | - Eduardo M Cilli
- Biochemistry and Technology Chemistry Department, Chemistry Institute, São Paulo State University (UNESP), Araraquara, São Paulo, 14800-900, Brazil
| | - Patrick S Barber
- Department of Chemistry, Earlham College, 801 National Road West, Richmond, IN, 47374, USA
| | - Adalberto Pessoa
- Department of Biochemical-Pharmaceutical Technology, Pharmaceutical Biotechnology Laboratory, University of Sao Paulo (USP), São Paulo, 05508-000, Brazil
| | - Jorge F B Pereira
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, São Paulo, 14800-903, Brazil.
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26
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Affiliation(s)
- Eduardo M. Cilli
- Department of Biochemistry and Chemical Technology, Institute of Chemistry, UNESP, Univ Estadual Paulista, Araraquara/SP, Brazil
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27
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Lorenzón EN, Nobre TM, Caseli L, Cilli EM, da Hora GC, Soares TA, Oliveira ON. The “pre-assembled state” of magainin 2 lysine-linked dimer determines its enhanced antimicrobial activity. Colloids Surf B Biointerfaces 2018; 167:432-440. [DOI: 10.1016/j.colsurfb.2018.04.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/09/2018] [Accepted: 04/16/2018] [Indexed: 11/25/2022]
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28
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Bernardes CP, Santos NAG, Sisti FM, Ferreira RS, Santos-Filho NA, Cintra ACO, Cilli EM, Sampaio SV, Santos AC. A synthetic snake-venom-based tripeptide (Glu-Val-Trp) protects PC12 cells from MPP + toxicity by activating the NGF-signaling pathway. Peptides 2018; 104:24-34. [PMID: 29684590 DOI: 10.1016/j.peptides.2018.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/12/2018] [Accepted: 04/16/2018] [Indexed: 01/05/2023]
Abstract
Venom small peptides that target neurotrophin receptors might be beneficial in neurodegeneration, including Parkinsońs disease (PD). Their small size, ease of synthesis, structural stability and target selectivity make them important tools to overcome the limitations of endogenous neurotrophins as therapeutic agents. Additionally, they might be optimized to improve resistance to enzymatic degradation, bioavailability, potency and, mainly, lipophilicity, important to cross the blood brain barrier (BBB). Here, we evaluated the neuroprotective effects and mechanisms of the synthetic snake-venom-based peptide p-BTX-I (Glu-Val-Trp) in PC12 cells treated with MPP+ (1-methyl-4-phenylpyridinium), a dopaminergic neurotoxin that induces Parkinsonism in vivo. The peptide p-BTX-I induced neuritogenesis, which was reduced by (i) k252a, antagonist of the NGF-selective receptor, trkA (tropomyosin receptor kinase A); (ii) LY294002, inhibitor of the PI3 K/AKT pathway and (iii) U0126, inhibitor of the MAPK-ERK pathway. Besides that, p-BTX-I also increased the expression of GAP-43 and synapsin, which are molecular markers of axonal growth and synaptic communication. In addition, the peptide increased the viability and differentiation of cells exposed to MPP+, known to inhibit neuritogenesis. Altogether, our findings suggest that the synthetic peptide p-BTX-I protects PC12 cells from MPP+ toxicity by a mechanism that mimics the neurotrophic action of NGF. Therefore, the molecular structure of p-BTX-I might be relevant in the development of drugs aimed at restoring the axonal connectivity in neurodegenerative processes.
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Affiliation(s)
- Carolina P Bernardes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil.
| | - Neife A G Santos
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Flavia M Sisti
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Rafaela Scalco Ferreira
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Norival A Santos-Filho
- Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Química de Araraquara-UNESP, Araraquara, SP, Brazil
| | - Adélia C O Cintra
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Eduardo M Cilli
- Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Química de Araraquara-UNESP, Araraquara, SP, Brazil
| | - Suely V Sampaio
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Antonio C Santos
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil.
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29
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Salay LC, Prazeres EA, Marín Huachaca NS, Lemos M, Piccoli JP, Sanches PRS, Cilli EM, Santos RS, Feitosa E. Molecular interactions between Pluronic F127 and the peptide tritrpticin in aqueous solution. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4304-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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30
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Piccoli J, Hein R, El-Sagheer AH, Brown T, Cilli EM, Bueno PR, Davis JJ. Redox Capacitive Assaying of C-Reactive Protein at a Peptide Supported Aptamer Interface. Anal Chem 2018; 90:3005-3008. [PMID: 29411973 DOI: 10.1021/acs.analchem.7b05374] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Electrochemical immunosensors offer much in the potential translation of a lab based sensing capability to a useful "real world" platform. In previous work we have introduced an impedance-derived electrochemical capacitance spectroscopic analysis as supportive of a reagentless means of reporting on analyte target capture at suitably prepared mixed-component redox-active, antibody-modified interfaces. Herein we directly integrate receptive aptamers into a redox charging peptide support in enabling a label-free low picomolar analytical assay for C-reactive protein with a sensitivity that significantly exceeds that attainable with an analogous antibody interface.
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Affiliation(s)
- Julia Piccoli
- Institute of Chemistry , São Paulo State University (UNESP) , 14800-900 , Araraquara , São Paulo , Brazil
| | - Robert Hein
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K
| | - Afaf H El-Sagheer
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K.,Chemistry Branch, Department of Science and Mathematics, Faculty of Petroleum and Mining Engineering , Suez University , Suez 43721 , Egypt
| | - Tom Brown
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K
| | - Eduardo M Cilli
- Institute of Chemistry , São Paulo State University (UNESP) , 14800-900 , Araraquara , São Paulo , Brazil
| | - Paulo R Bueno
- Institute of Chemistry , São Paulo State University (UNESP) , 14800-900 , Araraquara , São Paulo , Brazil
| | - Jason J Davis
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K
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31
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Enoki TA, Moreira-Silva I, Lorenzon EN, Cilli EM, Perez KR, Riske KA, Lamy MT. Antimicrobial Peptide K 0-W 6-Hya1 Induces Stable Structurally Modified Lipid Domains in Anionic Membranes. Langmuir 2018; 34:2014-2025. [PMID: 29284086 DOI: 10.1021/acs.langmuir.7b03408] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Considering the known different mode of action of antimicrobial peptides in zwitterionic and anionic cell membranes, the present work compares the action of the antimicrobial peptide K0-W6-Hya1 (KIFGAIWPLALGALKNLIK-NH2) with zwitterionic and negatively charged model membranes, namely, liposomes composed of phosphatidylcholine (PC) and phosphatidylglycerol (PG) membranes, and a mixture of the two. Differential scanning calorimetry (DSC), steady state fluorescence of the Trp residue, dynamic light scattering (DLS), and measurement of the leakage of an entrapped fluorescent dye (carboxyfluorescein, CF) were performed with large unilamellar vesicles (LUVs). All techniques evidenced the different action of the peptide in zwitterionic and anionic vesicles. Trp fluorescence spectroscopy shows that the differences are related not only to the partition of the cationic peptide in zwitterionic and anionic membranes, but also to the different penetration depth of the peptide into the lipid bilayers: Trp goes deeper into negatively charged membranes, both in the gel and fluid phases, than into zwitterionic ones. DSC shows that the peptide is strongly attached to anionic bilayers, giving rise to the coexistence of two different lipid regions, one depleted of peptide and another one peptide-disturbed, possibly a stable or transient polar pore, considering the leakage of CF. This contrasts with the homogeneous effect produced by the peptide in zwitterionic membranes, probably related to peptide-membrane diffusion. Moreover, in mixed bilayers (PC:PG), the peptide sequesters negatively charged lipids, creating peptide-rich anionic lipid regions, strongly disturbing the membrane. The distinct structural interaction displayed by the peptide in PC and PG membranes could be related to the different mechanisms of action of the peptide in anionic prokaryotic and zwitterionic eukaryotic cell membranes.
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Affiliation(s)
- Thais A Enoki
- Instituto de Física da Universidade de São Paulo, São Paulo, SP, CEP 05508-090, Brasil
| | - Isabela Moreira-Silva
- Departamento de Biofísica, Universidade Federal de São Paulo , São Paulo, SP, CEP 04039-032, Brazil
| | - Esteban N Lorenzon
- Departamento de Bioquímica e Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás , Goiânia, GO, CEP 74690-900, Brazil
| | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual de São Paulo , Araraquara, SP, CEP 14800-060, Brazil
| | - Katia R Perez
- Departamento de Biofísica, Universidade Federal de São Paulo , São Paulo, SP, CEP 04039-032, Brazil
| | - Karin A Riske
- Departamento de Biofísica, Universidade Federal de São Paulo , São Paulo, SP, CEP 04039-032, Brazil
| | - M Teresa Lamy
- Instituto de Física da Universidade de São Paulo, São Paulo, SP, CEP 05508-090, Brasil
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Vicente EF, Sahu ID, Crusca E, Basso LGM, Munte CE, Costa-Filho AJ, Lorigan GA, Cilli EM. HsDHODH Microdomain-Membrane Interactions Influenced by the Lipid Composition. J Phys Chem B 2017; 121:11085-11095. [PMID: 29148803 DOI: 10.1021/acs.jpcb.7b09642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Human dihydroorotate dehydrogenase (HsDHODH) enzyme has been studied as selective target for inhibitors to block the enzyme activity, intending to prevent proliferative diseases. The N-terminal microdomain seems to play an important role in the enzyme function. However, the molecular mechanism of action and dynamics of this region are not totally understood yet. This study analyzes the interaction and conformation in model membranes of HsDHODH microdomain using peptide analogues containing the paramagnetic amino acid TOAC at strategic positions. In buffer solution, the analogues presented a disordered conformation, but acquired a high content of α-helical structure in membrane mimetics, which was found to be lipid dependent. The microdomain peptide structure in micelles showed a very different peptide conformation when compared to the reported crystal structure, displaying a conformational flexibility of its helices, promoted by the connecting loop, which might be functionally relevant. Electron spin resonance in membrane compositions containing POPC, POPE, and cardiolipin showed that interaction of the analogues was enhanced by the presence of cardiolipin, indicating that the microdomain preferentially interacts with cardiolipin-containing membranes. Therefore, the great flexibility of the microdomain and the cardiolipin affinity should be considered in further studies aimed at finding new inhibitory compounds to fight proliferative diseases.
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Affiliation(s)
- Eduardo F Vicente
- School of Science and Engineering, São Paulo State University (UNESP) , 17602-496, Tupã, SP Brazil
| | - Indra D Sahu
- Department of Chemistry and Biochemistry, Miami University , Oxford, Ohio 45056, United States
| | - Edson Crusca
- Institute of Chemistry, São Paulo State University (UNESP) , 14800-900, Araraquara, SP Brazil.,Instituto de Física de São Carlos, Universidade de São Paulo (USP) , 13566-590 - São Carlos, SP Brazil
| | - Luis G M Basso
- Laboratório de Biofísica Molecular, Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo (USP) , 14040-901, Ribeirão Preto, SP Brazil
| | - Claudia E Munte
- Instituto de Física de São Carlos, Universidade de São Paulo (USP) , 13566-590 - São Carlos, SP Brazil
| | - Antonio J Costa-Filho
- Laboratório de Biofísica Molecular, Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo (USP) , 14040-901, Ribeirão Preto, SP Brazil
| | - Gary A Lorigan
- Department of Chemistry and Biochemistry, Miami University , Oxford, Ohio 45056, United States
| | - Eduardo M Cilli
- Institute of Chemistry, São Paulo State University (UNESP) , 14800-900, Araraquara, SP Brazil
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da Silva BR, Conrado AJS, Pereira AL, Evaristo FFV, Arruda FVS, Vasconcelos MA, Lorenzón EN, Cilli EM, Teixeira EH. Antibacterial activity of a novel antimicrobial peptide [W7]KR12-KAEK derived from KR-12 against Streptococcus mutans planktonic cells and biofilms. Biofouling 2017; 33:835-846. [PMID: 28967271 DOI: 10.1080/08927014.2017.1374378] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 08/24/2017] [Indexed: 06/07/2023]
Abstract
The aims of this study were to describe the synthesis of a novel synthetic peptide based on the primary structure of the KR-12 peptide and to evaluate its antimicrobial and anti-biofilm activities against Streptococcus mutans. The antimicrobial effect of KR-12 and [W7]KR12-KAEK was assessed by determining the minimum inhibitory (MIC) and minimum bactericidal (MBC) concentrations. The evaluation of anti-biofilm activity was assessed through total biomass quantification, colony forming unit counting and scanning electron microscopy. [W7]KR12-KAEK showed MIC and MBC values ranging from 31.25 to 7.8 and 62.5 to 15.6 μg ml-1, respectively. Furthermore, [W7]KR12-KAEK significantly reduced biofilm biomass (50-100%). Regarding cell viability, [W7]KR12-KAEK showed reductions in the number of CFUs at concentrations ranging from 62.5 to 7.8 μg ml-1 and 500 to 62.5 μg ml-1 with respect to biofilm formation and preformed biofilms, respectively. SEM micrographs of S. mutans treated with [W7]KR12-KAEK suggested damage to the bacterial surface. [W7]KR12-KAEK is demonstrated to be an antimicrobial agent to control microbial biofilms.
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Affiliation(s)
- B R da Silva
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
- d School of Dentistry , Universidade de Fortaleza - UNIFOR , Fortaleza , Brazil
| | - A J S Conrado
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
| | - A L Pereira
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
| | - F F V Evaristo
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
- b School of Dentistry , Faculdades INTA , Sobral , Brazil
| | - F V S Arruda
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
- b School of Dentistry , Faculdades INTA , Sobral , Brazil
| | - M A Vasconcelos
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
- e Department of Biological Sciences , Universidade do Estado do Rio Grande do Norte , Mossoró , Brazil
| | - E N Lorenzón
- f Institute of Biological Science , Universidade Federal de Goiás , Goiânia , Brazil
| | - E M Cilli
- c Institute of Chemistry , Universidade Estadual Paulista (UNESP) , Araraquara , Brazil
| | - E H Teixeira
- a DPML/LIBS, Integrated Laboratory of Biomolecules , Federal University of Ceará , Fortaleza , Brazil
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Lorenzón EN, Santos-Filho NA, Ramos MAS, Bauab TM, Camargo ILBC, Cilli EM. C-terminal Lysine-Linked Magainin 2 with Increased Activity Against Multidrug-Resistant Bacteria. Protein Pept Lett 2017; 23:738-47. [PMID: 27165408 DOI: 10.2174/0929866523666160511150907] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 05/03/2016] [Accepted: 05/08/2016] [Indexed: 11/22/2022]
Abstract
Due to the growing problem of antibiotic-resistant microorganisms, the development of novel antimicrobial agents is a very important challenge. Dimerization of cationic antimicrobial peptides (cAMPs) is a potential strategy for enhancing antimicrobial activity. Here, we studied the effects of magainin 2 (MG2) dimerization on its structure and biological activity. Lysine and glutamic acid were used to synthesize the C- and N-terminal dimers of MG2, respectively, in order to evaluate the impact of linker position used to obtain the dimers. Both MG2 and its dimeric versions showed a random coil structure in aqueous solution. However, in the presence of a structure-inducing solvent or a membrane mimetic, all peptides acquired helical structure. N-terminal dimerization did not affect the biological activity of the peptide. On the other hand, the C-terminal dimer, (MG2)2K, showed antimicrobial activity 8-16 times higher than that of MG2, and the time required to kill Escherichia coli was lower. The enhanced antimicrobial activity was related to membrane permeabilization. (MG2)2K was also more active against multidrug-resistant bacteria of clinical origin. Overall, the results presented here demonstrate that C-terminal lysine-linked dimerization improve the activity of MG2, and (MG2)2K can be considered as a potential antimicrobial agent.
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Affiliation(s)
| | | | | | | | | | - Eduardo M Cilli
- Institute of Chemistry, UNESP - Univ. Estadual Paulista, Araraquara, São Paulo, Brazil. Rua Prof. Francisco Degni, 55. 14800-060.
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35
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Basso LGM, Vicente EF, Crusca E, Cilli EM, Costa-Filho AJ. SARS-CoV fusion peptides induce membrane surface ordering and curvature. Sci Rep 2016; 6:37131. [PMID: 27892522 PMCID: PMC5125003 DOI: 10.1038/srep37131] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [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: 05/28/2016] [Accepted: 10/24/2016] [Indexed: 12/23/2022] Open
Abstract
Viral membrane fusion is an orchestrated process triggered by membrane-anchored viral fusion glycoproteins. The S2 subunit of the spike glycoprotein from severe acute respiratory syndrome (SARS) coronavirus (CoV) contains internal domains called fusion peptides (FP) that play essential roles in virus entry. Although membrane fusion has been broadly studied, there are still major gaps in the molecular details of lipid rearrangements in the bilayer during fusion peptide-membrane interactions. Here we employed differential scanning calorimetry (DSC) and electron spin resonance (ESR) to gather information on the membrane fusion mechanism promoted by two putative SARS FPs. DSC data showed the peptides strongly perturb the structural integrity of anionic vesicles and support the hypothesis that the peptides generate opposing curvature stresses on phosphatidylethanolamine membranes. ESR showed that both FPs increase lipid packing and head group ordering as well as reduce the intramembrane water content for anionic membranes. Therefore, bending moment in the bilayer could be generated, promoting negative curvature. The significance of the ordering effect, membrane dehydration, changes in the curvature properties and the possible role of negatively charged phospholipids in helping to overcome the high kinetic barrier involved in the different stages of the SARS-CoV-mediated membrane fusion are discussed.
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Affiliation(s)
- Luis G M Basso
- Grupo de Biofísica Molecular Sérgio Mascarenhas, Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador São-carlense, 400, Centro, São Carlos, SP, Brazil.,Laboratório de Biofísica Molecular, Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo. Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Eduardo F Vicente
- Faculdade de Ciências e Engenharia, UNESP - Univ Estadual Paulista, Campus de Tupã. Rua Domingos da Costa Lopes, 780, 17602-496, Tupã, SP, Brazil
| | - Edson Crusca
- Departamento de Bioquímica e Tecnologia Química, Instituto de Química, UNESP - Univ Estadual Paulista. Rua Prof. Franscisco Degni, 55, 14800-900, Araraquara, SP, Brazil
| | - Eduardo M Cilli
- Departamento de Bioquímica e Tecnologia Química, Instituto de Química, UNESP - Univ Estadual Paulista. Rua Prof. Franscisco Degni, 55, 14800-900, Araraquara, SP, Brazil
| | - Antonio J Costa-Filho
- Laboratório de Biofísica Molecular, Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo. Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
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36
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G. Nascimento G, C. Salay L, R.S. Sanches P, M. Cilli E. Molecular Interactions of an Ornithine-Rich pH-Responsive Self- Assembling Peptide with a Model Lipid Membrane: Conformational Aspects. Protein Pept Lett 2016; 23:790-4. [DOI: 10.2174/0929866523666160615010315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 06/14/2016] [Accepted: 06/14/2016] [Indexed: 11/22/2022]
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Piccoli JP, Santos A, Santos-Filho NA, Lorenzón EN, Cilli EM, Bueno PR. The self-assembly of redox active peptides: Synthesis and electrochemical capacitive behavior. Biopolymers 2016; 106:357-67. [DOI: 10.1002/bip.22815] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 12/16/2015] [Accepted: 01/14/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Julia P. Piccoli
- Department of Biochemistry and Technological Chemistry; , Institute of Chemistry, UNESP-Univ Estadual Paulista; São Paulo Brazil
| | - Adriano Santos
- Department of Physical Chemistry; Nanobionics Research Group, Institute of Chemistry, UNESP-Univ Estadual Paulista; São Paulo Brazil
| | - Norival A. Santos-Filho
- Department of Biochemistry and Technological Chemistry; , Institute of Chemistry, UNESP-Univ Estadual Paulista; São Paulo Brazil
| | - Esteban N. Lorenzón
- Department of Biochemistry and Technological Chemistry; , Institute of Chemistry, UNESP-Univ Estadual Paulista; São Paulo Brazil
| | - Eduardo M. Cilli
- Department of Biochemistry and Technological Chemistry; , Institute of Chemistry, UNESP-Univ Estadual Paulista; São Paulo Brazil
| | - Paulo R. Bueno
- Department of Physical Chemistry; Nanobionics Research Group, Institute of Chemistry, UNESP-Univ Estadual Paulista; São Paulo Brazil
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Guglielmi DAS, Martinelli AM, Rissi NC, Cilli EM, Soares CP, Chiavacci LA. Synthesis of the Peptide Ac-Wahx-KTTKS and Evaluation of the Ability to Induce In Vitro Collagen Synthesis. Protein Pept Lett 2016; 23:544-7. [PMID: 27184584 DOI: 10.2174/0929866523666160331144315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 03/17/2016] [Accepted: 03/29/2016] [Indexed: 11/22/2022]
Abstract
In this work, we report the synthesis of a peptide analogue of the KTTKS, termed Ac- Wahx-KTTKS and evaluate its cytotoxicity and role in biosynthesis of collagen for future application in skin aging. The peptide was obtained with purity higher than 97.5%. In the cytotoxicity assay, we observed non-toxic effects for Ac-WAhx-KTTKS at concentrations below 600 µM for HaCaT and 500 µM for HepG2 cells, respectively. After 24 and 48 h it was possible to observe significant changes in collagen synthesis in the groups treated with various concentrations of the peptide. In conclusion, the Ac-Wahx- KTTKS peptide increased collagen synthesis in fibroblasts by 80% and it is a promising candidate for improving skin aging.
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Affiliation(s)
| | | | | | | | | | - Leila A Chiavacci
- Faculdade de Ciências Farmacêuticas, UNESP, Araraquara-Jaú Interstate Highway, Km 1, 14801-902 Araraquara, SP, Brazil.
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39
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Santos-Filho NA, Lorenzon EN, Ramos MAS, Santos CT, Piccoli JP, Bauab TM, Fusco-Almeida AM, Cilli EM. Synthesis and characterization of an antibacterial and non-toxic dimeric peptide derived from the C-terminal region of Bothropstoxin-I. Toxicon 2015; 103:160-8. [PMID: 26160494 DOI: 10.1016/j.toxicon.2015.07.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [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: 05/19/2015] [Revised: 06/28/2015] [Accepted: 07/01/2015] [Indexed: 12/14/2022]
Abstract
Infectious diseases are among the leading global causes of death, increasing the search for novel antibacterial agents. Among these, biologically active peptides are an excellent research tool. Using solid-phase peptide synthesis (SPPS), this work aimed to synthesize the peptide derived from the C-terminal region of Bothropstoxin-I (BthTX-I) (p-BthTX-I, sequence: KKYRYHLKPFCKK), and its disulfide-linked dimeric form, obtained via air oxidation (p-BthTX-I)2. Two other peptides were synthesized to evaluate the dimerization effect on antimicrobial activity. In both sequences, the cysteine (Cys) residue was replaced by the serine (Ser) residue, differing, however, in their C-terminus position. The antimicrobial activity of the peptides against gram-negative (Escherichia (E.) coli) and gram-positive (Staphylococcus (S.) aureus) bacteria and yeast (Candida (C.) albicans) was evaluated. Interestingly, only peptides containing the Cys residue showed antimicrobial activity, suggesting the importance of Cys residue and its dimerization for the observed activity. Apparently, p-BthTX-I and (p-BthTX-I)2 did not promote lysis or form pores and were not able to interact with membranes. Furthermore, they neither showed antifungal activity against C. albicans nor toxicity against erythrocytes, epithelial cells, or macrophages, indicating a potential specificity against prokaryotic cells.
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Affiliation(s)
| | - Esteban N Lorenzon
- Instituto de Química, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Matheus A S Ramos
- Faculdade de Ciências Farmacêuticas, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Claudia T Santos
- Faculdade de Ciências Farmacêuticas, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Julia P Piccoli
- Instituto de Química, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Tais M Bauab
- Faculdade de Ciências Farmacêuticas, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Ana M Fusco-Almeida
- Faculdade de Ciências Farmacêuticas, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Eduardo M Cilli
- Instituto de Química, UNESP - Univ. Estadual Paulista, Araraquara, SP, Brazil.
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Vicente EF, Sahu ID, Costa-Filho AJ, Cilli EM, Lorigan GA. Conformational changes of the HsDHODH N-terminal Microdomain via DEER Spectroscopy. J Phys Chem B 2015; 119:8693-7. [PMID: 26086954 DOI: 10.1021/acs.jpcb.5b01706] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The human enzyme dihydroorotate dehydrogenase (HsDHODH) has been studied for being a target for development of new antineoplasic and antiproliferative drugs. The synthetic peptide N-t(DH) represents the N-terminal microdomain of this enzyme, responsible for anchoring it to the inner mitochondrial membrane. Also, it is known to harbor quinones that are essential for enzyme catalysis. Here we report structural features of the peptide/membrane interactions obtained by using CD and DEER spectroscopic techniques, both in micelles and in lipid vesicles. The data revealed different peptide conformational states in micelles and liposomes, which could suggest that this microdomain acts in specific regions or areas of the mitochondria, which can be related with the control of the quinone access to the HsDHODH active site. This is the first study to report on conformational changes of the HsDHODH N-terminal microdomain through a combination of CD and DEER spectroscopic techniques.
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Affiliation(s)
- Eduardo F Vicente
- †UNESP - Univ Estadual Paulista, Campus de Tupã, 17602-496, Tupã, SP Brazil
| | - Indra D Sahu
- ‡Department of Chemistry and Biochemistry, Miami University, 45056, Oxford, Ohio United States
| | - Antonio J Costa-Filho
- §Laboratório de Biofísica Molecular, Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo - USP,14040-901, Ribeirão Preto, SP Brazil
| | - Eduardo M Cilli
- ∥Departamento de Bioquímica e Tecnologia Química, Instituto de Química, UNESP - Univ Estadual Paulista, 14800-900, Araraquara, SP Brazil
| | - Gary A Lorigan
- ‡Department of Chemistry and Biochemistry, Miami University, 45056, Oxford, Ohio United States
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Santos A, Piccoli JP, Santos-Filho NA, Cilli EM, Bueno PR. Redox-tagged peptide for capacitive diagnostic assays. Biosens Bioelectron 2015; 68:281-287. [DOI: 10.1016/j.bios.2014.12.059] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 11/16/2022]
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Souza SEG, Malavolta L, Cilli EM, Schreier S, Jubilut GN, Nakaie CR. Novel copoly(styrene-divinylbenzene)-resins with different phenylmethylamine groups for use in Peptide synthesis method. Protein Pept Lett 2015; 22:392-401. [PMID: 25658115 DOI: 10.2174/0929866522666150206170329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 01/23/2015] [Accepted: 01/27/2015] [Indexed: 11/22/2022]
Abstract
Differently than the 4-methylbenzhydrylamine-resin (MBHAR) which contains a methyl group coupled to the phenylmethylamine-functionalized copoly(styrene-divinilbenzene) structure, alternative resins containing the electron-donating 4-tert-butyl- (BUBHAR) or the electron-withdrawing 2-chloro- (ClBHAR) and 2,4-chloro- (diClBHAR) groups were developed as potential supports for α- carboxamide peptide synthesis. Initially, a time-course investigation of HF cleavage reaction (0 °C) with these resins bearing the vasoconstrictor angiotensin II (AngII, DRVYIHPF) or its Gly(8)-AngII analogue revealed that the peptide- BUBHAR linkage is much more labile than those with ClBHAR or diClBHAR. HF cleavage times of near 2 h or longer than 24 h were needed for complete removal of peptide chains from these two classes of resin, respectively. By including MBHAR and benzhydrylamine-resins (BHAR) in this comparative study, the decreasing order of acid stability of the peptidyl- resin linkage was diClBHAR > ClBHAR > BHAR > MBHAR ~ BUBHAR. The same stability order was observed for the HCl/propionic acid hydrolysis reaction (130°C) with the Phe- or Gly-resins. These findings thus suggest that ClBHAR and diClBHAR are not appropriate for use in peptide synthesis. Nevertheless, these supports could still be tested as stationary phases for affinity chromatography. When placed into more apolar solvents, the beads of all of these resins exhibited a greater swelling (as measured by a microscope) or higher mobility of the polymer matrix (as measured with EPR experiments using spin-labeled beads). Moreover, under the latter approach, BUBHAR displayed a comparatively higher solvation degree than did MBHAR (in DCM, DMF and NMP), with slightly higher peptide synthesis yields as well.
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Affiliation(s)
| | | | | | | | | | - Clovis R Nakaie
- Department of Biophysics - Paulista Medical School, Federal University of Sao Paulo, Rua 3 de Maio 100, CEP 04044-020 Sao Paulo, SP, Brazil.
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43
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Fauth EVF, Cilli EM, Ligabue-Braun R, Verli H. Differential effect of solution conditions on the conformation of the actinoporins Sticholysin II and Equinatoxin II. AN ACAD BRAS CIENC 2015; 86:1949-62. [PMID: 25590731 DOI: 10.1590/0001-3765201420140270] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 08/11/2014] [Indexed: 11/22/2022] Open
Abstract
Actinoporins are a family of pore-forming proteins with hemolytic activity. The structural basis for such activity appears to depend on their correct folding. Such folding encompasses a phosphocholine binding site, a tryptophan-rich region and the activity-related N-terminus segment. Additionally, different solution conditions are known to be able to influence the pore formation by actinoporins, as for Sticholysin II (StnII) and Equinatoxin II (EqtxII). In this context, the current work intends to characterize the influence of distinct solution conditions in the conformational behavior of these proteins through molecular dynamics (MD) simulations. The obtained data offer structural insights into actinoporins dynamics in solution, characterizing its conformational behavior at the atomic level, in accordance with previous experimental data on StnII and EqtxII hemolytic activities.
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Affiliation(s)
| | - Eduardo M Cilli
- Departamento de Bioquímica e Tecnologia Química, UNESP, Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brasil
| | | | - Hugo Verli
- Centro de Biotecnologia, UFRGS, Porto Alegre, RS, Brasil
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Lopes JL, Nobre TM, Cilli EM, Beltramini LM, Araújo AP, Wallace B. Deconstructing the DGAT1 enzyme: Binding sites and substrate interactions. Biochimica et Biophysica Acta (BBA) - Biomembranes 2014; 1838:3145-52. [DOI: 10.1016/j.bbamem.2014.08.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 08/11/2014] [Accepted: 08/12/2014] [Indexed: 11/28/2022]
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45
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Altei WF, Picchi DG, Abissi BM, Giesel GM, Flausino O, Reboud-Ravaux M, Verli H, Crusca E, Silveira ER, Cilli EM, Bolzani VS. Jatrophidin I, a cyclic peptide from Brazilian Jatropha curcas L.: isolation, characterization, conformational studies and biological activity. Phytochemistry 2014; 107:91-96. [PMID: 25200101 DOI: 10.1016/j.phytochem.2014.08.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 07/09/2014] [Accepted: 08/07/2014] [Indexed: 06/03/2023]
Abstract
A cyclic peptide, jatrophidin I, was isolated from the latex of Jatropha curcas L. Its structure was elucidated by extensive 2D NMR spectroscopic analysis, with additional conformational studies performed using Molecular Dynamics/Simulated Annealing (MD/SA). Jatrophidin I had moderate protease inhibition activity when compared with pepstatin A; however, the peptide was inactive in antimalarial, cytotoxic and antioxidant assays.
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Affiliation(s)
- Wanessa F Altei
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil
| | - Douglas G Picchi
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil
| | - Barbara M Abissi
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil
| | - Guilherme M Giesel
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Av Bento Gonçalves 9500, CP 15005, Porto Alegre 91500-970, RS, Brazil
| | - Otavio Flausino
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil
| | - Michèle Reboud-Ravaux
- Enzymologie Moléculaire et Fonctionnelle, UR4, UPMC, Sorbonne Universités, 7 Quai St Bernard, 75252 Paris Cedex 05, France
| | - Hugo Verli
- Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av Ipiranga 2752, Porto Alegre 90610-000, RS, Brazil
| | - Edson Crusca
- Departamento de Bioquímica e Biotecnologia, Instituto de Química Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil
| | - Edilberto R Silveira
- Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceará, Fortaleza, CE 60.430-270, Brazil
| | - Eduardo M Cilli
- Departamento de Bioquímica e Biotecnologia, Instituto de Química Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil
| | - Vanderlan S Bolzani
- Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais (NuBBE), Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista 'Julio de Mesquita Filho', CP 355, 14801-970 Araraquara, SP, Brazil.
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46
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Lorenzón EN, Piccoli JP, Cilli EM. Interaction between the antimicrobial peptide Aurein 1.2 dimer and mannans. Amino Acids 2014; 46:2627-31. [PMID: 25209238 DOI: 10.1007/s00726-014-1832-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 08/27/2014] [Indexed: 02/04/2023]
Abstract
We have previously described the structure and the ability of a dimeric analog of the antimicrobial peptide Aurein 1.2 to aggregate Candida albicans. In this study, circular dichroism and fluorescence spectroscopy data showed that this aggregation is related to the interaction between the peptide and mannans, the main component of yeast cell wall. In this context, we propose a model in which dimers interact with the polysaccharide leading to cells aggregation.
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Affiliation(s)
- Esteban N Lorenzón
- Institute of Chemistry, UNESP - Univ Estadual Paulista, Rua Prof. Francisco Degni, 55, Bairro, Quitandinha, CEP 14800-060, Araraquara, São Paulo, Brazil
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47
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Santos-Filho NA, Boldrini-França J, Santos-Silva LK, Menaldo DL, Henrique-Silva F, Sousa TS, Cintra ACO, Mamede CCN, Oliveira F, Arantes EC, Antunes LMG, Cilli EM, Sampaio SV. Heterologous expression and biochemical and functional characterization of a recombinant alpha-type myotoxin inhibitor from Bothrops alternatus snake. Biochimie 2014; 105:119-28. [PMID: 25047442 DOI: 10.1016/j.biochi.2014.07.001] [Citation(s) in RCA: 10] [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: 01/17/2014] [Accepted: 07/02/2014] [Indexed: 10/25/2022]
Abstract
Venomous and non-venomous snakes possess phospholipase A2 (PLA2) inhibitory proteins (PLIs) in their blood serum. This study shows the expression and biochemical and functional characterization of a recombinant alpha inhibitor from Bothrops alternatus snake, named rBaltMIP. Its expression was performed in Pichia pastoris heterologous system, resulting in an active recombinant protein. The expressed inhibitor was tested regarding its ability to inhibit the phospholipase activity of different PLA2s, showing slight inhibitions especially at the molar ratios of 1:1 and 1:3 (PLA2:PLI). rBaltMIP was also effective in decreasing the myotoxic activity of the tested toxins at molar ratios greater than 1:0.4 (myotoxin:PLI). The inhibition of the myotoxic activity of different Asp49 (BthTX-II and PrTX-III) and Lys49 (BthTX-I and PrTX-I) myotoxins was also performed without the prior incubation of myotoxins/inhibitor in order to analyze the real possibility of using snake plasma inhibitors or recombinant inhibitors as therapeutic agents for treating envenomations. As a result, rBaltMIP was able to significantly inhibit the myotoxicity of Lys49 myotoxins. Histopathological analysis of the gastrocnemius muscles of mice showed that the myotoxins are able to induce severe damage to the muscle fibers of experimental animals by recruiting a large number of leukocyte infiltrates, besides forming an intense accumulation of intercellular fluid, leading to local edema. When those myotoxins were incubated with rBaltMIP, a reduction of the damage site could be observed. Furthermore, the cytotoxic activity of Asp49 PLA2s and Lys49 PLA2-like enzymes on C2C12 cell lines was decreased, as shown by the higher cell viabilities after preincubation with rBaltMIP. Heterologous expression would enable large-scale obtainment of rBaltMIP, thus allowing further investigations for the elucidation of possible mechanisms of inhibition of snake PLA2s, which have not yet been fully clarified.
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Affiliation(s)
- Norival A Santos-Filho
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil; Instituto de Química, Universidade Estadual Paulista, UNESP, Araraquara, SP, Brazil.
| | - Johara Boldrini-França
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Ludier K Santos-Silva
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCAR, São Carlos, SP, Brazil
| | - Danilo L Menaldo
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Flávio Henrique-Silva
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCAR, São Carlos, SP, Brazil
| | - Tiago S Sousa
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Adélia C O Cintra
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Carla C N Mamede
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Fábio Oliveira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Eliane C Arantes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Lusânia M Greggi Antunes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil
| | - Eduardo M Cilli
- Instituto de Química, Universidade Estadual Paulista, UNESP, Araraquara, SP, Brazil
| | - Suely V Sampaio
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, FCFRP-USP, Ribeirão Preto, SP, Brazil.
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48
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Enoki TA, Riske KA, Perez KR, Lorenzon EN, Cilli EM, Lamy MT. The Interaction Between the Antimicrobial Peptide K-Hya1 and Model Membranes: Distinct Action in Neutral or Negatively Charged Bilayers. Biophys J 2014. [DOI: 10.1016/j.bpj.2013.11.543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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49
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Cilli EM, Lorenzon EN, Riske KA. New Insights into the Mechanism of Action of the Antimicrobial Peptide Aurein 1.2. Isothermal Titration Calorimetry and Confocal Microscopy Studies. Biophys J 2014. [DOI: 10.1016/j.bpj.2013.11.3692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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50
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Ros U, Souto ALCF, de Oliveira FJ, Crusca E, Pazos F, Cilli EM, Lanio ME, Schreier S, Alvarez C. Functional and topological studies with Trp-containing analogs of the peptide StII1-30derived from the N-terminus of the pore forming toxin sticholysin II: contribution to understand its orientation in membrane. Biopolymers 2013; 100:337-46. [DOI: 10.1002/bip.22211] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 12/14/2012] [Accepted: 01/14/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Uris Ros
- Center for Protein Studies; Biology Faculty; University of Havana (UH); Havana; Cuba
| | - Ana Lucia C. F. Souto
- Department of Biochemistry; Institute of Chemistry; University of São Paulo (USP); São Paulo; Brazil
| | - Felipe J. de Oliveira
- Department of Biochemistry; Institute of Chemistry; University of São Paulo (USP); São Paulo; Brazil
| | - Edson Crusca
- Department of Biochemistry and Chemical Technology; Institute of Chemistry; São Paulo State University (UNESP); Araraquara; São Paulo; Brazil
| | - Fabiola Pazos
- Center for Protein Studies; Biology Faculty; University of Havana (UH); Havana; Cuba
| | - Eduardo M. Cilli
- Department of Biochemistry and Chemical Technology; Institute of Chemistry; São Paulo State University (UNESP); Araraquara; São Paulo; Brazil
| | - Maria E. Lanio
- Center for Protein Studies; Biology Faculty; University of Havana (UH); Havana; Cuba
| | - Shirley Schreier
- Department of Biochemistry; Institute of Chemistry; University of São Paulo (USP); São Paulo; Brazil
| | - Carlos Alvarez
- Center for Protein Studies; Biology Faculty; University of Havana (UH); Havana; Cuba
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