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Barros ALAN, Silva VC, Ribeiro-Junior AF, Cardoso MG, Costa SR, Moraes CB, Barbosa CG, Coleone AP, Simões RP, Cabral WF, Falcão RM, Vasconcelos AG, Rocha JA, Arcanjo DDR, Batagin-Neto A, Borges TKS, Gonçalves J, Brand GD, Freitas-Junior LHG, Eaton P, Marani M, Kato MJ, Plácido A, Leite JRSA. Antiviral Action against SARS-CoV-2 of a Synthetic Peptide Based on a Novel Defensin Present in the Transcriptome of the Fire Salamander ( Salamandra salamandra). Pharmaceutics 2024; 16:190. [PMID: 38399250 PMCID: PMC10892092 DOI: 10.3390/pharmaceutics16020190] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/19/2024] [Accepted: 01/26/2024] [Indexed: 02/25/2024] Open
Abstract
The potential emergence of zoonotic diseases has raised significant concerns, particularly in light of the recent pandemic, emphasizing the urgent need for scientific preparedness. The bioprospection and characterization of new molecules are strategically relevant to the research and development of innovative drugs for viral and bacterial treatment and disease management. Amphibian species possess a diverse array of compounds, including antimicrobial peptides. This study identified the first bioactive peptide from Salamandra salamandra in a transcriptome analysis. The synthetic peptide sequence, which belongs to the defensin family, was characterized through MALDI TOF/TOF mass spectrometry. Molecular docking assays hypothesized the interaction between the identified peptide and the active binding site of the spike WT RBD/hACE2 complex. Although additional studies are required, the preliminary evaluation of the antiviral potential of synthetic SS-I was conducted through an in vitro cell-based SARS-CoV-2 infection assay. Additionally, the cytotoxic and hemolytic effects of the synthesized peptide were assessed. These preliminary findings highlighted the potential of SS-I as a chemical scaffold for drug development against COVID-19, hindering viral infection. The peptide demonstrated hemolytic activity while not exhibiting cytotoxicity at the antiviral concentration.
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Affiliation(s)
- Ana Luisa A N Barros
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
- Programa de Pós-graduação em Medicina Tropical, PGMT, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - Vladimir C Silva
- Laboratório de Vigilância Genômica e Biologia Molecular-Fundação Oswaldo Cruz Piauí, Teresina 64001-350, PI, Brazil
| | - Atvaldo F Ribeiro-Junior
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - Miguel G Cardoso
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
- imed.ULisboa-Research Institute for Medicines, Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal
| | - Samuel R Costa
- Instituto de Química, IQ, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - Carolina B Moraes
- Department of Pharmaceutical Sciences, Federal University of São Paulo, Diadema 09913-030, SP, Brazil
| | - Cecília G Barbosa
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo 05508-000, SP, Brazil
| | - Alex P Coleone
- Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
| | - Rafael P Simões
- School of Agriculture, Department of Bioprocess and Biotechnology, São Paulo State University (UNESP), Botucatu 18618-689, SP, Brazil
| | - Wanessa F Cabral
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - Raul M Falcão
- Bioinformatics Postgraduate Program, Metrópole Digital Institute, Federal University of Rio Grande do Norte, Natal 59078-900, RN, Brazil
| | - Andreanne G Vasconcelos
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
- People&Science Pesquisa Desenvolvimento e Inovação LTDA, Centro de Desenvolvimento Tecnológico (CDT), Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - Jefferson A Rocha
- Campus São Bernardo, Universidade Federal do Maranhão, UFMA, São Bernardo 65550-000, MA, Brazil
| | - Daniel D R Arcanjo
- Department of Biophysics and Physiology, Federal University of Piauí, Teresina 64049-550, PI, Brazil
| | - Augusto Batagin-Neto
- Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, SP, Brazil
- Institute of Sciences and Engineering, São Paulo State University (UNESP), Itapeva 18409-010, SP, Brazil
| | - Tatiana Karla S Borges
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - João Gonçalves
- imed.ULisboa-Research Institute for Medicines, Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal
| | - Guilherme D Brand
- Instituto de Química, IQ, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
| | - Lucio H G Freitas-Junior
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo 05508-000, SP, Brazil
| | - Peter Eaton
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
- School of Chemistry, The Bridge, University of Lincoln, Lincoln LN6 7EL, UK
| | - Mariela Marani
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn 9120, Argentina
| | - Massuo J Kato
- Instituto de Química (IQ), Universidade de São Paulo (USP), São Paulo 05508-900, SP, Brazil
| | - Alexandra Plácido
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília 70910-900, DF, Brazil
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Silva-Carvalho AÉ, Oliveira NND, Machado JVL, Moreira DC, Brand GD, Leite JRSA, Plácido A, Eaton P, Saldanha-Araujo F. The Peptide Salamandrin-I Modulates Components Involved in Pyroptosis and Induces Cell Death in Human Leukemia Cell Line HL-60. Pharmaceutics 2023; 15:1864. [PMID: 37514049 PMCID: PMC10384876 DOI: 10.3390/pharmaceutics15071864] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/26/2023] [Accepted: 06/29/2023] [Indexed: 07/30/2023] Open
Abstract
Amphibian secretions have been extensively investigated for the production of bioactive molecules. Salamandrin-I is an antioxidant peptide, isolated from the skin secretion of the fire salamander, that has induced no toxicity in microglia or erythrocytes. Importantly, the administration of antioxidants may constitute an adequate therapeutic approach to cancer treatment. Here, with the purpose of better characterizing the therapeutic potential of salamandrin-I, we investigated whether this antioxidant peptide also exerts anticancer activity, using the human leukemia cell line HL-60 as a cancer model. Salamandrin-I treatment induced a significant reduction in HL-60 proliferation, which was accompanied by cell cycle arrest. Furthermore, the peptide-induced cell death showed a significant increase in the LDH release in HL-60 cells. The cellular toxicity exerted by salamandrin-I is possibly related to pyroptosis, since the HL-60 cells showed loss of mitochondrial membrane potential and hyperexpression of inflammasome components following the peptide treatment. This is the first demonstration of the anticancer potential of the salamandrin-I peptide. Such results are important, as they offer relevant insights into the field of cancer therapy and allow the design of future bioactive molecules using salamandrin-I as a template.
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Affiliation(s)
- Amandda Évelin Silva-Carvalho
- Laboratory of Hematology and Stem Cells (LHCT), Faculty of Health Sciences, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
| | - Nakaly Natiely de Oliveira
- Laboratory of Hematology and Stem Cells (LHCT), Faculty of Health Sciences, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
| | - Julia Viana Lafetá Machado
- Laboratory of Hematology and Stem Cells (LHCT), Faculty of Health Sciences, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
| | - Daniel Carneiro Moreira
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
| | - Guilherme Dotto Brand
- Institute of Chemistry, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
| | - José Roberto S A Leite
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
| | - Alexandra Plácido
- LAQV/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Peter Eaton
- The Bridge, School of Chemistry, University of Lincoln, Lincoln LN6 7TS, UK
| | - Felipe Saldanha-Araujo
- Laboratory of Hematology and Stem Cells (LHCT), Faculty of Health Sciences, University of Brasilia, Campus Darcy Ribeiro SN, Brasilia 70910-900, Brazil
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Báo SN, Machado M, Da Silva AL, Melo A, Cunha S, Sousa SS, Malheiro AR, Fernandes R, Leite JRSA, Vasconcelos AG, Relvas J, Pintado M. Potential Biological Properties of Lycopene in a Self-Emulsifying Drug Delivery System. Molecules 2023; 28:molecules28031219. [PMID: 36770886 PMCID: PMC9920511 DOI: 10.3390/molecules28031219] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023] Open
Abstract
In recent years, lycopene has been highlighted due to its antioxidant and anti-inflammatory properties, associated with a beneficial effect on human health. The aim of this study was to advance the studies of antioxidant and anti-inflammatory mechanisms on human keratinocytes cells (HaCaT) of a self-emulsifying drug delivery system (SEDDS) loaded with lycopene purified from red guava (nanoLPG). The characteristics of nanoLPG were a hydrodynamic diameter of 205 nm, a polydispersity index of 0.21 and a zeta potential of -20.57, providing physical stability for the nanosystem. NanoLPG demonstrated antioxidant capacity, as shown using the ORAC methodology, and prevented DNA degradation (DNA agarose). Proinflammatory activity was evaluated by quantifying the cytokines TNF-α, IL-6 and IL-8, with only IL-8 showing a significant increase (p < 0.0001). NanoLPG showed greater inhibition of the tyrosinase and elastase enzymes, involved in the skin aging process, compared to purified lycopene (LPG). In vitro treatment for 24 h with 5.0 µg/mL of nanoLPG did not affect the viability of HaCaT cells. The ultrastructure of HaCaT cells demonstrated the maintenance of morphology. This contrasts with endoplasmic reticulum stresses and autophagic vacuoles when treated with LPG after stimulation or not with LPS. Therefore, the use of lycopene in a nanoemulsion may be beneficial in strategies and products associated with skin health.
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Affiliation(s)
- Sônia Nair Báo
- Laboratório de Microscopia e Microanálise, Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília 70910-900, DF, Brazil
- Correspondence:
| | - Manuela Machado
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Ana Luisa Da Silva
- Laboratório de Microscopia e Microanálise, Departamento de Biologia Celular, Instituto de Ciências Biológicas, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília 70910-900, DF, Brazil
| | - Adma Melo
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Sara Cunha
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Sérgio S. Sousa
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Ana Rita Malheiro
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Rui Fernandes
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - José Roberto S. A. Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília 70910-900, DF, Brazil
- People & Science Pesquisa, Desenvolvimento e Inovação Ltda, Brasília 70910-900, DF, Brazil
| | - Andreanne G. Vasconcelos
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Campus Universitário Darcy Ribeiro, Asa Norte, Brasília 70910-900, DF, Brazil
- People & Science Pesquisa, Desenvolvimento e Inovação Ltda, Brasília 70910-900, DF, Brazil
| | - João Relvas
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Manuela Pintado
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
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4
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Santos MA, Silva FL, Lira BOV, Cardozo Fh JL, Vasconcelos AG, Araujo AR, Murad AM, Garay AV, Freitas SM, Leite JRSA, Bloch C, Ramada MHS, de Oliveira AL, Brand GD. Probing human proteins for short encrypted antimicrobial peptides reveals Hs10, a peptide with selective activity for gram-negative bacteria. Biochim Biophys Acta Gen Subj 2023; 1867:130265. [PMID: 36280021 DOI: 10.1016/j.bbagen.2022.130265] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/04/2022] [Accepted: 10/17/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND Some cationic and amphiphilic α-helical segments of proteins adsorb to prokaryotic membranes when synthesized as individual polypeptide sequences, resulting in broad and potent antimicrobial activity. However, amphiphilicity, a determinant physicochemical property for peptide-membrane interactions, can also be observed in some β-sheets. METHODS The software Kamal was used to scan the human reference proteome for short (7-11 amino acid residues) cationic and amphiphilic protein segments with the characteristic periodicity of β-sheets. Some of the uncovered peptides were chemically synthesized, and antimicrobial assays were conducted. Biophysical techniques were used to probe the molecular interaction of one peptide with phospholipid vesicles, lipopolysaccharides (LPS) and the bacterium Escherichia coli. RESULTS Thousands of compatible segments were found in human proteins, five were synthesized, and three presented antimicrobial activity in the micromolar range. Hs10, a nonapeptide fragment of the Complement C3 protein, could inhibit only the growth of tested Gram-negative microorganisms, presenting also little cytotoxicity to human fibroblasts. Hs10 interacted with LPS while transitioning from an unstructured segment to a β-sheet and increased the hydrodynamic radius of LPS particles. This peptide also promoted morphological alterations in E. coli cells. CONCLUSIONS Data presented herein introduce yet another molecular template to probe proteins in search for encrypted membrane-active segments and demonstrates that, using this approach, short peptides with low cytotoxicity and high selectivity to prokaryotic cells might be obtained. GENERAL SIGNIFICANCE This work widens the biotechnological potential of the human proteome as a source of antimicrobial peptides with application in human health.
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Affiliation(s)
- Michele A Santos
- Laboratório de Ressonância Magnética Nuclear, LRMN, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil; Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil
| | - Fernanda L Silva
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil
| | - Bianca O V Lira
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - José L Cardozo Fh
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil
| | - Andreanne G Vasconcelos
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Campus Universitário Darcy Ribeiro, Universidade de Brasília, Brasília, DF, Brazil
| | - Alyne R Araujo
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, Parnaíba, PI, Brazil
| | - André M Murad
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil
| | - Aisel V Garay
- Laboratório de Biofísica Molecular, Instituto de Biologia, Universidade de Brasília (IB-CEL/UnB), Campus Darcy Ribeiro, Asa Norte, Brasília, DF, Brazil
| | - Sonia M Freitas
- Laboratório de Biofísica Molecular, Instituto de Biologia, Universidade de Brasília (IB-CEL/UnB), Campus Darcy Ribeiro, Asa Norte, Brasília, DF, Brazil
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Campus Universitário Darcy Ribeiro, Universidade de Brasília, Brasília, DF, Brazil
| | - Carlos Bloch
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil
| | - Marcelo H S Ramada
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil; Programa de Pós-Graduação em Gerontologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - Aline Lima de Oliveira
- Laboratório de Ressonância Magnética Nuclear, LRMN, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil
| | - Guilherme D Brand
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil.
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Dematei A, Costa SR, Moreira DC, Barbosa EA, Friaça Albuquerque LF, Vasconcelos AG, Nascimento T, Silva PC, Silva-Carvalho AÉ, Saldanha-Araújo F, Silva Mancini MC, Saboia Ponte LG, Neves Bezerra RM, Simabuco FM, Batagin-Neto A, Brand G, Borges TKS, Eaton P, Leite JRSA. Antioxidant and Neuroprotective Effects of the First Tryptophyllin Found in Snake Venom ( Bothrops moojeni). J Nat Prod 2022; 85:2695-2705. [PMID: 36508333 DOI: 10.1021/acs.jnatprod.2c00304] [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] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this study, we report the isolation, characterization, and synthesis of the peptide BmT-2 belonging to the tryptophyllins family, isolated from the venom of the snake Bothrops moojeni. This is the first time a tryptophyllin is identified in snake venom. We tested whether BmT-2 had cytotoxic effects and antioxidant activity in a set of experiments that included both in vitro and cell-based assays. BmT-2 presented a radical scavenging activity toward ABTS• and AAPH-derived radicals. BmT-2 protected fluorescein, DNA molecules, and human red blood cells (RBCs) from free radicals generated by the thermal decomposition of AAPH. The novel tryptophyllin was not toxic in cell viability tests, where it (up to 0.4 mg/mL) did not cause hemolysis of human RBCs and did not cause significant loss of cell viability, showing a CC50 > 1.5 mM for cytotoxic effects against SK-N-BE(2) neuroblastoma cells. BmT-2 prevented the arsenite-induced upregulation of Nrf2 in Neuro-2a neuroblasts and the phorbol myristate acetate-induced overgeneration of reactive oxygen species and reactive nitrogen species in SK-N-BE(2) neuroblastoma cells. Electronic structure calculations and full atomistic reactive molecular dynamics simulations revealed the relevant contribution of aromatic residues in BmT-2 to its antioxidant properties. Our study presents a novel peptide classified into the family of the tryptophyllins, which has been reported exclusively in amphibians. Despite the promising results on its antioxidant activity and low cytotoxicity, the mechanisms of action of BmT-2 still need to be further elucidated.
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Affiliation(s)
- Anderson Dematei
- Center for Tropical Medicine (NMT), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Samuel Ribeiro Costa
- Laboratory for the Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry, University of Brasilia, Brasília 70910-900, Brazil
| | - Daniel C Moreira
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Eder Alves Barbosa
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
- Laboratory for the Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry, University of Brasilia, Brasília 70910-900, Brazil
| | - Lucas F Friaça Albuquerque
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Andreanne G Vasconcelos
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Tiago Nascimento
- Research Center on Biodiversity and Biotechnology (Biotec), Parnaiba Delta Federal University, Parnaíba 64202-020, Brazil
| | - Pedro Costa Silva
- Research Center on Biodiversity and Biotechnology (Biotec), Parnaiba Delta Federal University, Parnaíba 64202-020, Brazil
| | - Amandda É Silva-Carvalho
- Laboratory of Hematology and Stem Cells (LHCT), Faculty of Health Sciences, University of Brasília, Brasília 70910-900, Brazil
| | - Felipe Saldanha-Araújo
- Laboratory of Hematology and Stem Cells (LHCT), Faculty of Health Sciences, University of Brasília, Brasília 70910-900, Brazil
| | - Mariana Camargo Silva Mancini
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences, University of Campinas, Campinas 13083-970, Brazil
| | - Luis Gustavo Saboia Ponte
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences, University of Campinas, Campinas 13083-970, Brazil
| | - Rosangela Maria Neves Bezerra
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences, University of Campinas, Campinas 13083-970, Brazil
| | - Fernando Moreira Simabuco
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences, University of Campinas, Campinas 13083-970, Brazil
| | - Augusto Batagin-Neto
- Institute of Science and Engineering, São Paulo State University (UNESP), Itapeva, São Paulo 01049-010, Brazil
| | - Guilherme Brand
- Laboratory for the Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry, University of Brasilia, Brasília 70910-900, Brazil
| | - Tatiana Karla S Borges
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Peter Eaton
- LAQV/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4099-002, Portugal
- The Bridge, Joseph Banks Laboratories, School of Chemistry, University of Lincoln, Lincoln LN6 7TS, U.K
| | - José Roberto S A Leite
- Center for Tropical Medicine (NMT), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
- Research Center in Morphology and Applied Immunology (NuPMIA), Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
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6
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Plácido A, do Pais do Amaral C, Teixeira C, Nogueira A, Brango-Vanegas J, Alves Barbosa E, C Moreira D, Silva-Carvalho AÉ, da Silva MDG, do Nascimento Dias J, Albuquerque P, Saldanha-Araújo F, C D A Lima F, Batagin-Neto A, Kuckelhaus S, Bessa LJ, Freitas J, Dotto Brand G, C Santos N, B Relvas J, Gomes P, S A Leite JR, Eaton P. Neuroprotective effects on microglia and insights into the structure-activity relationship of an antioxidant peptide isolated from Pelophylax perezi. J Cell Mol Med 2022; 26:2793-2807. [PMID: 35460166 PMCID: PMC9097852 DOI: 10.1111/jcmm.17292] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 06/23/2021] [Revised: 02/07/2022] [Accepted: 02/22/2022] [Indexed: 11/29/2022] Open
Abstract
Tryptophyllins constitute a heterogeneous group of peptides that are one of the first classes of peptides identified from amphibian’s skin secretions. Here, we report the structural characterization and antioxidant properties of a novel tryptophyllin‐like peptide, named PpT‐2, isolated from the Iberian green frog Pelophylax perezi. The skin secretion of P. perezi was obtained by electrical stimulation and fractionated using RP‐HPLC. De novo peptide sequencing was conducted using MALDI MS/MS. The primary structure of PpT‐2 (FPWLLS‐NH2) was confirmed by Edman degradation and subsequently investigated using in silico tools. PpT‐2 shared physicochemical properties with other well‐known antioxidants. To test PpT‐2 for antioxidant activity in vitro, the peptide was synthesized by solid phase and assessed in the chemical‐based ABTS and DPPH scavenging assays. Then, a flow cytometry experiment was conducted to assess PpT‐2 antioxidant activity in oxidatively challenged murine microglial cells. As predicted by the in silico analyses, PpT‐2 scavenged free radicals in vitro and suppressed the generation of reactive species in PMA‐stimulated BV‐2 microglia cells. We further explored possible bioactivities of PpT‐2 against prostate cancer cells and bacteria, against which the peptide exerted a moderate antiproliferative effect and negligible antimicrobial activity. The biocompatibility of PpT‐2 was evaluated in cytotoxicity assays and in vivo toxicity with Galleria mellonella. No toxicity was detected in cells treated with up to 512 µg/ml and in G. mellonella treated with up to 40 mg/kg PpT‐2. This novel peptide, PpT‐2, stands as a promising peptide with potential therapeutic and biotechnological applications, mainly for the treatment/prevention of neurodegenerative disorders.
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Affiliation(s)
- Alexandra Plácido
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | | | - Cátia Teixeira
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Ariane Nogueira
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - José Brango-Vanegas
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Eder Alves Barbosa
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil.,Laboratory of Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry (IQ), University of Brasilia, Brasília, Brazil
| | - Daniel C Moreira
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Amandda É Silva-Carvalho
- Laboratory of Hematology and Stem Cells, Faculty of Health Sciences, University of Brasilia, Brasília, Brazil
| | - Maria da Gloria da Silva
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Jhones do Nascimento Dias
- Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, Brazil.,Biomedicine Course, Federal University of Delta do Parnaíba (UFDPar), Parnaíba, Brazil
| | - Patrícia Albuquerque
- Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, Brazil.,Faculty of Ceilândia, University of Brasilia, Brasilia, Brazil
| | - Felipe Saldanha-Araújo
- Laboratory of Hematology and Stem Cells, Faculty of Health Sciences, University of Brasilia, Brasília, Brazil
| | - Filipe C D A Lima
- Federal Institute of Education, Science and Technology of São Paulo, Matão, Brazil
| | | | - Selma Kuckelhaus
- Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Lucinda J Bessa
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal.,Egas Moniz Interdisciplinary Research Center (CiiEM), Egas Moniz - Cooperative for Higher Education, CRL, Almada, Portugal
| | - Jaime Freitas
- Institute for Research and Innovation in Health (i3S), National Institute of Biomedical Engineering (INEB), University of Porto, Porto, Portugal
| | - Guilherme Dotto Brand
- Laboratory of Synthesis and Analysis of Biomolecules (LSAB), Institute of Chemistry (IQ), University of Brasilia, Brasília, Brazil
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - João B Relvas
- Institute for Research and Innovation in Health (i3S), Institute for Molecular and Cell Biology (IBMC), University of Porto, Porto, Portugal
| | - Paula Gomes
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal
| | - José Roberto S A Leite
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal.,Center for Research in Applied Morphology and Immunology (NuPMIA), University of Brasilia, Brasilia, Brazil
| | - Peter Eaton
- Department of Chemistry and Biochemistry, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Porto, Portugal.,The Bridge, School of Chemistry, Joseph Banks Laboratories, University of Lincoln, Lincoln, UK
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7
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Barros ALAN, Hamed A, Marani M, Moreira DC, Eaton P, Plácido A, Kato MJ, Leite JRSA. The Arsenal of Bioactive Molecules in the Skin Secretion of Urodele Amphibians. Front Pharmacol 2022; 12:810821. [PMID: 35095522 PMCID: PMC8795703 DOI: 10.3389/fphar.2021.810821] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 11/08/2021] [Accepted: 12/24/2021] [Indexed: 11/20/2022] Open
Abstract
Urodele amphibians (∼768 spp.), salamanders and newts, are a rich source of molecules with bioactive properties, especially those isolated from their skin secretions. These include pharmacological attributes, such as antimicrobial, antioxidant, vasoactive, immune system modulation, and dermal wound healing activities. Considering the high demand for new compounds to guide the discovery of new drugs to treat conventional and novel diseases, this review summarizes the characteristics of molecules identified in the skin of urodele amphibians. We describe urodele-derived peptides and alkaloids, with emphasis on their biological activities, which can be considered new scaffolds for the pharmaceutical industry. Although much more attention has been given to anurans, bioactive molecules produced by urodeles have the potential to be used for biotechnological purposes and stand as viable alternatives for the development of therapeutic agents.
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Affiliation(s)
- Ana L A N Barros
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.,Programa de Pós-graduação em Medicina Tropical, PPGMT, Núcleo de Medicina Tropical, NMT, Faculdade de Medicina, UnB, Brasília, Brazil
| | - Abdelaaty Hamed
- Instituto de Química, IQ, Universidade de São Paulo, São Paulo, Brazil.,Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City-Cairo, Egypt
| | - Mariela Marani
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Argentina
| | - Daniel C Moreira
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil
| | - Peter Eaton
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.,Joseph Banks Laboratories, The Bridge, School of Chemistry, University of Lincoln, Lincoln, United Kingdom
| | - Alexandra Plácido
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal.,Bioprospectum, Lda, UPTEC, Porto, Portugal
| | - Massuo J Kato
- Instituto de Química, IQ, Universidade de São Paulo, São Paulo, Brazil
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, Brasília, Brazil.,Programa de Pós-graduação em Medicina Tropical, PPGMT, Núcleo de Medicina Tropical, NMT, Faculdade de Medicina, UnB, Brasília, Brazil.,Bioprospectum, Lda, UPTEC, Porto, Portugal
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8
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Vasconcelos AG, Barros ALAN, Cabral WF, Moreira DC, da Silva IGM, Silva-Carvalho AÉ, de Almeida MP, Albuquerque LFF, dos Santos RC, S. Brito AK, Saldanha-Araújo F, Arcanjo DDR, C. Martins MDC, dos S. Borges TK, Báo SN, Plácido A, Eaton P, Kuckelhaus SAS, Leite JRSA. Promising self-emulsifying drug delivery system loaded with lycopene from red guava (Psidium guajava L.): in vivo toxicity, biodistribution and cytotoxicity on DU-145 prostate cancer cells. Cancer Nanotechnol 2021. [DOI: 10.1186/s12645-021-00103-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Self-emulsifying drug delivery systems (SEDDSs) have attracted attention because of their effects on solubility and bioavailability of lipophilic compounds. Herein, a SEDDS loaded with lycopene purified from red guava (nanoLPG) was produced. The nanoemulsion was characterized using dynamic light scattering (DLS), zeta potential measurement, nanoparticle tracking analysis (NTA), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), lycopene content quantification, radical scavenging activity and colloidal stability in cell culture medium. Then, in vivo toxicity and tissue distribution in orally treated mice and cytotoxicity on human prostate carcinoma cells (DU-145) and human peripheral blood mononuclear cells (PBMC) were evaluated.
Results
NanoLPG exhibited physicochemical properties with a size around 200 nm, negative zeta-potential, and spherical morphology. The size, polydispersity index, and zeta potential parameters suffered insignificant alterations during the 12 month storage at 5 °C, which were associated with lycopene stability at 5 °C for 10 months. The nanoemulsion showed partial aggregation in cell culture medium at 37 °C after 24 h. NanoLPG at 0.10 mg/mL exhibited radical scavenging activity equivalent to 0.043 ± 0.002 mg Trolox/mL. The in vivo studies did not reveal any significant changes in clinical, behavioral, hematological, biochemical, and histopathological parameters in mice orally treated with nanoLPG at 10 mg/kg for 28 days. In addition, nanoLPG successfully delivered lycopene to the liver, kidney and prostate in mice, improved its cytotoxicity against DU-145 prostate cancer cells—probably by pathway independent on classical necrosis and apoptosis—and did not affect PBMC viability.
Conclusions
Thus, nanoLPG stands as a promising and biosafe lycopene delivery system for further development of nanotechnology-based health products.
Graphical Abstract
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9
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Stricker PEF, Souza D, Irioda AC, Franco CRC, Leite JRSA, Araújo AR, Borges FA, Herculano RD, Graeff CFO, Carvalho KAT. Differentiation of human mesenchymal stem cells through the natural matrix to neurospheres for cholinergic-like cells. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab120.057] [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] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
In Alzheimer's Disease there is an impairment of the cholinergic system, causing loss of neurons, impairment of intellectual abilities. In this context, the mesenchymal stem cells (MSC) and its applications in cell therapies become target of the research, which may contribute to the treatment of neurodegenerative diseases. Through the differentiation potential of MSCs, prospecting functional repair of the injured tissue from cholinergic neuronal cells could be a potential treatment. The aims was to evaluate the possibility of differentiation of MSCs from the human umbilical cord in nestin-positive neural precursor cells (NPCN+) through the NFBX into cholinergic ‘like’ cells.
Methods
The isolation of hMSCs from Wharton's jelly (WJ) was by the explant and mononuclear cells by density gradient. hMSCs were plating in natural matrix as NFBX for neurospheres production. Neural precursor cells were subjected to standard cholinergic differentiation protocol. Dissociated neurospheres, neural precursor cells and cholinergic-like cells were characterized by immunocytochemistry. The RT-PCR was done.
Results
hMSCs were CD73+, CD90+, CD105+, CD34- and CD45- and demonstrated the trilineage differentiation. Neurospheres and their isolated cells were nestin positive, and also expressed NESTIN, MAP2, ßIII-TUBULIN, GFAPgenes. Neural precursor cells that were differentiated in cholinergic-like cells expressed ßIII-TUBULIN protein and choline acetyltransferase enzyme.
Conclusions
hMSCs on the natural matrix were capable of differentiating hMSC into neurospheres, obtaining neural precursor cells without growth factors or gene transfection before cholinergic differentiation.
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Affiliation(s)
- P E F Stricker
- Cell Therapy and Biotechnology in Regenerative Medicine Department, Pelé Pequeno Príncipe Institute, Child and Adolescent Health Research and Pequeno Príncipe Faculty, Curitiba, Paraná, Brazil
| | - D Souza
- Cell Therapy and Biotechnology in Regenerative Medicine Department, Pelé Pequeno Príncipe Institute, Child and Adolescent Health Research and Pequeno Príncipe Faculty, Curitiba, Paraná, Brazil
| | - A C Irioda
- Cell Therapy and Biotechnology in Regenerative Medicine Department, Pelé Pequeno Príncipe Institute, Child and Adolescent Health Research and Pequeno Príncipe Faculty, Curitiba, Paraná, Brazil
| | - C R C Franco
- Cell Biology Department, Federal University of Paraná, Curitiba, Paraná, Brazil
| | - J R S A Leite
- Faculty of Medicine, Brasília University, Brasilia, Federal District, Brazil
| | - A R Araújo
- Biodiversity and Biotechnology Research, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - F A Borges
- Faculty of Pharmaceutics Sciences, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - R D Herculano
- Faculty of Pharmaceutics Sciences, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - C F O Graeff
- Physics Department, São Paulo State University (UNESP), Bauru, São Paulo, Brazil
| | - K A T Carvalho
- Cell Therapy and Biotechnology in Regenerative Medicine Department, Pelé Pequeno Príncipe Institute, Child and Adolescent Health Research and Pequeno Príncipe Faculty, Curitiba, Paraná, Brazil
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10
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Dematei A, Nunes JB, Moreira DC, Jesus JA, Laurenti MD, Mengarda ACA, Vieira MS, do Amaral CP, Domingues MM, de Moraes J, Passero LFD, Brand G, Bessa LJ, Wimmer R, Kuckelhaus SAS, Tomás AM, Santos NC, Plácido A, Eaton P, Leite JRSA. Mechanistic Insights into the Leishmanicidal and Bactericidal Activities of Batroxicidin, a Cathelicidin-Related Peptide from a South American Viper ( Bothrops atrox). J Nat Prod 2021; 84:1787-1798. [PMID: 34077221 DOI: 10.1021/acs.jnatprod.1c00153] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Snake venoms are important sources of bioactive molecules, including those with antiparasitic activity. Cathelicidins form a class of such molecules, which are produced by a variety of organisms. Batroxicidin (BatxC) is a cathelicidin found in the venom of the common lancehead (Bothrops atrox). In the present work, BatxC and two synthetic analogues, BatxC(C-2.15Phe) and BatxC(C-2.14Phe)des-Phe1, were assessed for their microbicidal activity. All three peptides showed a broad-spectrum activity on Gram-positive and -negative bacteria, as well as promastigote and amastigote forms of Leishmania (Leishmania) amazonensis. Circular dichroism (CD) and nuclear magnetic resonance (NMR) data indicated that the three peptides changed their structure upon interaction with membranes. Biomimetic membrane model studies demonstrated that the peptides exert a permeabilization effect in prokaryotic membranes, leading to cell morphology distortion, which was confirmed by atomic force microscopy (AFM). The molecules considered in this work exhibited bactericidal and leishmanicidal activity at low concentrations, with the AFM data suggesting membrane pore formation as their mechanism of action. These peptides stand as valuable prototype drugs to be further investigated and eventually used to treat bacterial and protozoal infections.
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Affiliation(s)
- Anderson Dematei
- Center for Tropical Medicine, NMT, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - João B Nunes
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
- Laboratory for the Synthesis and Analysis of Biomolecules, LSAB, Institute of Chemistry, University of Brasilia, Brasília 70910-900, Brazil
| | - Daniel C Moreira
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Jéssica A Jesus
- Institute of Biosciences, São Paulo State University, São Paulo, Brazil
| | - Márcia D Laurenti
- Department of Pathology, Laboratory of Pathology of Infectious Diseases, Faculty of Medicine, University of São Paulo, São Paulo 05508-060, Brazil
| | - Ana C A Mengarda
- Research Center on Neglected Diseases, NPDN, University of Guarulhos, Guarulhos 07023-070, Brazil
| | - Maria Silva Vieira
- I3S, Institute of Research and Innovation in Health, University of Porto, Porto 4099-002, Portugal
- IBMC, Institute of Molecular and Cellular Biology, University of Porto, Porto 4099-002, Portugal
| | - Constança Pais do Amaral
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Marco M Domingues
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Josué de Moraes
- Research Center on Neglected Diseases, NPDN, University of Guarulhos, Guarulhos 07023-070, Brazil
| | - Luiz F D Passero
- Institute of Biosciences, São Paulo State University, São Paulo, Brazil
- Department of Pathology, Laboratory of Pathology of Infectious Diseases, Faculty of Medicine, University of São Paulo, São Paulo 05508-060, Brazil
| | - Guilherme Brand
- Laboratory for the Synthesis and Analysis of Biomolecules, LSAB, Institute of Chemistry, University of Brasilia, Brasília 70910-900, Brazil
| | - Lucinda J Bessa
- LAQV/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences of the University of Porto, Porto 4099-002, Portugal
| | - Reinhard Wimmer
- Department of Chemistry and Bioscience, Aalborg University, Aalborg 9220, Denmark
| | - Selma A S Kuckelhaus
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
| | - Ana M Tomás
- I3S, Institute of Research and Innovation in Health, University of Porto, Porto 4099-002, Portugal
- IBMC, Institute of Molecular and Cellular Biology, University of Porto, Porto 4099-002, Portugal
- ICBAS, Abel Salazar Institute for Biomedical Research, University of Porto, Porto 4099-002, Portugal
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Alexandra Plácido
- LAQV/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences of the University of Porto, Porto 4099-002, Portugal
| | - Peter Eaton
- LAQV/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences of the University of Porto, Porto 4099-002, Portugal
- The Bridge, Joseph Banks Laboratories, School of Chemistry, University of Lincoln, Lincoln LN6 7TS, U.K
| | - José Roberto S A Leite
- Center for Tropical Medicine, NMT, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
- Research Center in Morphology and Applied Immunology, NuPMIA, Faculty of Medicine, University of Brasilia, Brasília 70910-900, Brazil
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11
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Vasconcelos AG, Valim MO, Amorim AGN, do Amaral CP, de Almeida MP, Borges TKS, Socodato R, Portugal CC, Brand GD, Mattos JSC, Relvas J, Plácido A, Eaton P, Ramos DAR, Kückelhaus SAS, Leite JRSA. Cytotoxic activity of poly-ɛ-caprolactone lipid-core nanocapsules loaded with lycopene-rich extract from red guava (Psidium guajava L.) on breast cancer cells. Food Res Int 2020; 136:109548. [PMID: 32846600 DOI: 10.1016/j.foodres.2020.109548] [Citation(s) in RCA: 15] [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: 01/20/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 12/13/2022]
Abstract
The aims of this study were to produce poly-ɛ-caprolactone lipid-core nanocapsules containing lycopene-rich extract from red guava (LEG), to characterize those nanoparticles and to evaluate their cytotoxic effects on human breast cancer cells. Lipid-core nanocapsules containing the extract (nanoLEG) were produced by the method of interfacial deposition of the preformed polymer. The nanoparticles were characterized by Dynamic Light Scattering (DLS), Polydispersity Index, Zeta Potential, pH, Encapsulation Efficiency, Nanoparticle Tracking Analysis (NTA), Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). Cell viability was evaluated by the MTT dye reduction method in the human breast cancer MCF-7 cell line and inhibition of ROS and NF-κB was assayed in living human microglial cell line (HMC3) by time-lapse images microscopy. A hemolytic activity assay was carried out with sheep blood. Data showed that nanoparticles average size was around 200 nm, nanoparticles concentration/mL was around 0.1 µM, negative zeta potential, pH < 5.0 and spherical shape, with low variation during a long storage period (7 months) at 5 °C, indicating stability of the system and protection against lycopene degradation. The percentage of encapsulation varied from 95% to 98%. The nanoLEG particles significantly reduced the viability of the MCF-7 cells after 24 h (61.47%) and 72 h (55.96%) of exposure, even at the lowest concentration tested (6.25-200 μg/ml) and improved on the cytotoxicity of free LEG to MCF-7. NanoLEG inhibited LPS-induced NF-kB activation and ROS production in microglial cells. The particles did not affect the membrane integrity of sheep blood erythrocytes at the concentrations tested (6.25-200 μg/mL). Thus, the formulation of lipid-core nanocapsules with a polysorbate 80-coated poly-ɛ-caprolactone wall was efficiently applied to stabilize the lycopene-rich extract from red guava, generating a product with satisfactory physico-chemical and biological properties for application as health-promoting nanotechnology-based nutraceutical, emphasizing its potential to be used as a cancer treatment.
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Affiliation(s)
- Andreanne G Vasconcelos
- Applied Immunology and Morphology Research Centre, NuPMIA, Morphology Area, Faculty of Medicine, University of Brasília, UnB, Brasília, Distrito Federal, Brazil
| | - Martina O Valim
- Applied Immunology and Morphology Research Centre, NuPMIA, Morphology Area, Faculty of Medicine, University of Brasília, UnB, Brasília, Distrito Federal, Brazil
| | - Adriany G N Amorim
- Biotechnology and Biodiversity Research Centre, BIOTEC, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, Parnaíba, Piauí, Brazil
| | - Constança Pais do Amaral
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Miguel Peixoto de Almeida
- LAQV/REQUIMTE, Departmento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal
| | - Tatiana K S Borges
- Laboratory of Cellular Immunology, Pathology Area, Faculty of Medicine, University of Brasília, UnB, Brasília, Distrito Federal, Brazil
| | - Renato Socodato
- Instituto de Investigação e Inovação em Saúde, i3S, Universidade do Porto, Porto, Portugal
| | - Camila C Portugal
- Instituto de Investigação e Inovação em Saúde, i3S, Universidade do Porto, Porto, Portugal
| | - Guilherme D Brand
- Institute of Chemistry, University of Brasília, UnB, Brasília, Distrito Federal, Brazil
| | | | - João Relvas
- Instituto de Investigação e Inovação em Saúde, i3S, Universidade do Porto, Porto, Portugal
| | - Alexandra Plácido
- LAQV/REQUIMTE, Departmento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal; Instituto de Investigação e Inovação em Saúde, i3S, Universidade do Porto, Porto, Portugal
| | - Peter Eaton
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal; LAQV/REQUIMTE, Departmento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Porto, Portugal
| | - Doralina A R Ramos
- Laboratory of Molecular Pathology of Cancer, Pathology Area, Faculty of Medicine, University of Brasília, UnB, Brasília, Brazil
| | - Selma A S Kückelhaus
- Applied Immunology and Morphology Research Centre, NuPMIA, Morphology Area, Faculty of Medicine, University of Brasília, UnB, Brasília, Distrito Federal, Brazil
| | - José Roberto S A Leite
- Applied Immunology and Morphology Research Centre, NuPMIA, Morphology Area, Faculty of Medicine, University of Brasília, UnB, Brasília, Distrito Federal, Brazil.
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12
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Plácido A, Ferreira-da-Silva F, Leite JRSA, de-los-Santos-Álvarez N, Delerue-Matos C. A convenient renewable surface plasmon resonance chip for relative quantification of genetically modified soybean in food and feed. PLoS One 2020; 15:e0229659. [PMID: 32101588 PMCID: PMC7043770 DOI: 10.1371/journal.pone.0229659] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 10/04/2019] [Accepted: 02/12/2020] [Indexed: 01/09/2023] Open
Abstract
The cultivation of genetically modified organisms (GMO) continues to expand worldwide. Still, many consumers express concerns about the use of GMO in food or feed, and many countries have legislated on labelling systems to indicate the presence of GMO in commercial products. To deal with the increased number of GMO events and to address related regulations, alternative detection methods for GMO inspection are required. In this work, a genosensor based on Surface Plasmon Resonance under continuous flow was developed for the detection and quantification of a genetically modified soybean (event GTS 40-3-2). In a single chip, the simultaneous detection of the event-specific and the taxon-specific samples were achieved, whose detection limits were 20 pM and 16 pM, respectively. The reproducibility was 1.4%, which supports the use of the chip as a reliable and cost-effective alternative to other DNA-based techniques. The results indicate that the proposed method is a versatile tool for GMO quantification in food and feed samples.
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Affiliation(s)
- Alexandra Plácido
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Porto, Portugal
| | - Frederico Ferreira-da-Silva
- Instituto de Investigação e Inovação em Saúde, i3S, Universidade do Porto, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - José Roberto S. A. Leite
- Área Morfologia, Faculdade de Medicina, Campus Darcy Ribeiro, Universidade de Brasília, Brasília, Federal District, Brazil
| | | | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Porto, Portugal
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13
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Sousa NA, Oliveira GAL, de Oliveira AP, Lopes ALF, Iles B, Nogueira KM, Araújo TSL, Souza LKM, Araújo AR, Ramos-Jesus J, Plácido A, Amaral C, Campelo YDM, Barbosa EA, Portugal CC, Socodato R, Lobo A, Relvas J, Bemquerer M, Eaton P, Leite JRSA, Medeiros JVR. Novel Ocellatin Peptides Mitigate LPS-induced ROS Formation and NF-kB Activation in Microglia and Hippocampal Neurons. Sci Rep 2020; 10:2696. [PMID: 32060388 PMCID: PMC7021831 DOI: 10.1038/s41598-020-59665-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 06/10/2019] [Accepted: 01/31/2020] [Indexed: 12/18/2022] Open
Abstract
Cutaneous secretions of amphibians have bioactive compounds, such as peptides, with potential for biotechnological applications. Therefore, this study aimed to determine the primary structure and investigate peptides obtained from the cutaneous secretions of the amphibian, Leptodactylus vastus, as a source of bioactive molecules. The peptides obtained possessed the amino acid sequences, GVVDILKGAAKDLAGH and GVVDILKGAAKDLAGHLASKV, with monoisotopic masses of [M + H]± = 1563.8 Da and [M + H]± = 2062.4 Da, respectively. The molecules were characterized as peptides of the class of ocellatins and were named as Ocellatin-K1(1-16) and Ocellatin-K1(1-21). Functional analysis revealed that Ocellatin-K1(1-16) and Ocellatin-K1(1-21) showed weak antibacterial activity. However, treatment of mice with these ocellatins reduced the nitrite and malondialdehyde content. Moreover, superoxide dismutase enzymatic activity and glutathione concentration were increased in the hippocampus of mice. In addition, Ocellatin-K1(1-16) and Ocellatin-K1(1-21) were effective in impairing lipopolysaccharide (LPS)-induced reactive oxygen species (ROS) formation and NF-kB activation in living microglia. We incubated hippocampal neurons with microglial conditioned media treated with LPS and LPS in the presence of Ocellatin-K1(1-16) and Ocellatin-K1(1-21) and observed that both peptides reduced the oxidative stress in hippocampal neurons. Furthermore, these ocellatins demonstrated low cytotoxicity towards erythrocytes. These functional properties suggest possible to neuromodulatory therapeutic applications.
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Affiliation(s)
- Nayara A Sousa
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Guilherme A L Oliveira
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Ana Patrícia de Oliveira
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - André Luís F Lopes
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Bruno Iles
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Kerolayne M Nogueira
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Thiago S L Araújo
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil.,Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Luan K M Souza
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil.,Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Alyne R Araújo
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, UFPI, Piauí, Brazil
| | - Joilson Ramos-Jesus
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, UFPI, Piauí, Brazil.,Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Alexandra Plácido
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde and Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, Porto, Portugal
| | - Constança Amaral
- Instituto de Medicina Molecular, IMM, Universidade de Lisboa, Lisboa, Portugal
| | - Yuri D M Campelo
- Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Eder Alves Barbosa
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, UnB, Brasília, Brazil
| | - Camila C Portugal
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | - Renato Socodato
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | - Andrea Lobo
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | - Joao Relvas
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | | | - Peter Eaton
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal.,Instituto de Medicina Molecular, IMM, Universidade de Lisboa, Lisboa, Portugal
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunonologia Aplicada, NuPMIA, Área Morfologia, Faculdade de Medicina, UnB, Brasília, Brazil
| | - Jand Venes R Medeiros
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil. .,Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, UFPI, Piauí, Brazil.
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14
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Eaton P, do Amaral CP, Couto SCP, Oliveira MS, Vasconcelos AG, Borges TKS, Kückelhaus SAS, Leite JRSA, Muniz-Junqueira MI. Atomic Force Microscopy Is a Potent Technique to Study Eosinophil Activation. Front Physiol 2019; 10:1261. [PMID: 31632296 PMCID: PMC6781654 DOI: 10.3389/fphys.2019.01261] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 09/17/2019] [Indexed: 12/18/2022] Open
Abstract
Eosinophils are multifunctional cells with several functions both in healthy individuals, and those with several diseases. Increased number and morphological changes in eosinophils have been correlated with the severity of an acute asthma exacerbation. We measured eosinophils obtained from healthy controls and individuals with acute asthma using atomic force microscopy (AFM). In the control samples, cells showed more rounded morphologies with some spreading, while activated cells from symptomatic individuals were spreading, and presenting emission of multiple pseudopods. Eosinophils presenting separate granules close to the cells suggesting some degranulation was also increased in asthma samples. In comparison to histopathological techniques based on brightfield microscopy, AFM showed considerably more details of these morphological changes, making the technique much more sensitive to detect eosinophil morphological changes that indicate functional alteration of this cell. AFM could be an important tool to evaluate diseases with alterations in eosinophil functions.
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Affiliation(s)
- Peter Eaton
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Constança Pais do Amaral
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Shirley C P Couto
- Laboratory of Cellular Immunology, Pathology Area, Faculty of Medicine, University of Brasília, Brasília, Brazil
| | - Mariangela S Oliveira
- Laboratory of Cellular Immunology, Pathology Area, Faculty of Medicine, University of Brasília, Brasília, Brazil
| | - Andreanne G Vasconcelos
- Research Center in Morphology and Applied Immunology, Morphology Area, Faculty of Medicine, University of Brasília, Brasília, Brazil
| | - Tatiana K S Borges
- Laboratory of Cellular Immunology, Pathology Area, Faculty of Medicine, University of Brasília, Brasília, Brazil
| | - Selma A S Kückelhaus
- Research Center in Morphology and Applied Immunology, Morphology Area, Faculty of Medicine, University of Brasília, Brasília, Brazil
| | - José Roberto S A Leite
- Research Center in Morphology and Applied Immunology, Morphology Area, Faculty of Medicine, University of Brasília, Brasília, Brazil
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15
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Brand GD, Ramada MHS, Manickchand JR, Correa R, Ribeiro DJS, Santos MA, Vasconcelos AG, Abrão FY, Prates MV, Murad AM, Cardozo Fh JL, Leite JRSA, Magalhães KG, Oliveira AL, Bloch C. Intragenic antimicrobial peptides (IAPs) from human proteins with potent antimicrobial and anti-inflammatory activity. PLoS One 2019; 14:e0220656. [PMID: 31386688 PMCID: PMC6684085 DOI: 10.1371/journal.pone.0220656] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 06/10/2019] [Accepted: 07/19/2019] [Indexed: 11/20/2022] Open
Abstract
Following the treads of our previous works on the unveiling of bioactive peptides encrypted in plant proteins from diverse species, the present manuscript reports the occurrence of four proof-of-concept intragenic antimicrobial peptides in human proteins, named Hs IAPs. These IAPs were prospected using the software Kamal, synthesized by solid phase chemistry, and had their interactions with model phospholipid vesicles investigated by differential scanning calorimetry and circular dichroism. Their antimicrobial activity against bacteria, yeasts and filamentous fungi was determined, along with their cytotoxicity towards erythrocytes. Our data demonstrates that Hs IAPs are capable to bind model membranes while attaining α-helical structure, and to inhibit the growth of microorganisms at concentrations as low as 1μM. Hs02, a novel sixteen residue long internal peptide (KWAVRIIRKFIKGFIS-NH2) derived from the unconventional myosin 1h protein, was further investigated in its capacity to inhibit lipopolysaccharide-induced release of TNF-α in murine macrophages. Hs02 presented potent anti-inflammatory activity, inhibiting the release of TNF-α in LPS-primed cells at the lowest assayed concentration, 0.1 μM. A three-dimensional solution structure of Hs02 bound to DPC micelles was determined by Nuclear Magnetic Resonance. Our work exemplifies how the human genome can be mined for molecules with biotechnological potential in human health and demonstrates that IAPs are actual alternatives to antimicrobial peptides as pharmaceutical agents or in their many other putative applications.
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Affiliation(s)
- Guilherme D. Brand
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília, Brasília, DF, Brasil
- * E-mail:
| | - Marcelo H. S. Ramada
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brasil
- Programa de Pós-Graduação em Gerontologia, Universidade Católica de Brasília, Brasília, DF, Brasil
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brasil
| | - Júlia R. Manickchand
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília, Brasília, DF, Brasil
| | - Rafael Correa
- Laboratório de Imunologia e Inflamação, LIMI, Instituto de Biologia, Universidade de Brasília, Brasília, DF, Brasil
| | - Dalila J. S. Ribeiro
- Laboratório de Imunologia e Inflamação, LIMI, Instituto de Biologia, Universidade de Brasília, Brasília, DF, Brasil
| | - Michele A. Santos
- Laboratório de Ressonância Magnética Nuclear, LRMN, Instituto de Química, Universidade de Brasília, Brasília, DF, Brasil
| | - Andreanne G. Vasconcelos
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Campus Universitário Darcy Ribeiro, Universidade de Brasília, Brasília, DF, Brasil
| | | | - Maura V. Prates
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brasil
| | - André M. Murad
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brasil
| | - José L. Cardozo Fh
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brasil
- Departamento de Fitopatologia, Instituto Mato-Grossense do Algodão, Primavera do Leste, MT, Brasil
| | - José Roberto S. A. Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Campus Universitário Darcy Ribeiro, Universidade de Brasília, Brasília, DF, Brasil
| | - Kelly G. Magalhães
- Laboratório de Imunologia e Inflamação, LIMI, Instituto de Biologia, Universidade de Brasília, Brasília, DF, Brasil
| | - Aline L. Oliveira
- Laboratório de Ressonância Magnética Nuclear, LRMN, Instituto de Química, Universidade de Brasília, Brasília, DF, Brasil
| | - Carlos Bloch
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brasil
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16
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Bessa LJ, Manickchand JR, Eaton P, Leite JRSA, Brand GD, Gameiro P. Intragenic Antimicrobial Peptide Hs02 Hampers the Proliferation of Single- and Dual-Species Biofilms of P. aeruginosa and S. aureus: A Promising Agent for Mitigation of Biofilm-Associated Infections. Int J Mol Sci 2019; 20:E3604. [PMID: 31340580 PMCID: PMC6678116 DOI: 10.3390/ijms20143604] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/12/2019] [Accepted: 07/15/2019] [Indexed: 01/24/2023] Open
Abstract
Pseudomonas aeruginosa and Staphylococcus aureus are two major pathogens involved in a large variety of infections. Their co-occurrence in the same site of infection has been frequently reported and is linked to enhanced virulence and difficulty of treatment. Herein, the antimicrobial and antibiofilm activities of an intragenic antimicrobial peptide (IAP), named Hs02, which was uncovered from the human unconventional myosin 1H protein, were investigated against several P. aeruginosa and S. aureus strains, including multidrug-resistant (MDR) isolates. The antibiofilm activity was evaluated on single- and dual-species biofilms of P. aeruginosa and S. aureus. Moreover, the effect of peptide Hs02 on the membrane fluidity of the strains was assessed through Laurdan generalized polarization (GP). Minimum inhibitory concentration (MIC) values of peptide Hs02 ranged from 2 to 16 μg/mL against all strains and MDR isolates. Though Hs02 was not able to hamper biofilm formation by some strains at sub-MIC values, it clearly affected 24 h preformed biofilms, especially by reducing the viability of the bacterial cells within the single- and dual-species biofilms, as shown by confocal laser scanning microscopy (CLSM) and atomic force microscopy (AFM) images. Laurdan GP values showed that Hs02 induces membrane rigidification in both P. aeruginosa and S. aureus. Peptide Hs02 can potentially be a lead for further improvement as an antibiofilm agent.
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Affiliation(s)
- Lucinda J Bessa
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da, Universidade do Porto, 4050-313 Porto, Portugal.
| | - Julia R Manickchand
- Laboratório de Síntese e Análise de Biomoléculas, Instituto de Química, Universidade de Brasília, UnB, Brasília DF 70910-900, Brasil
| | - Peter Eaton
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da, Universidade do Porto, 4050-313 Porto, Portugal
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunonologia Aplicada, NuPMIA, Área de Morfologia, Faculdade de Medicina, FM, Universidade de Brasília, UnB, Brasília DF 70910-900, Brasil
| | - Guilherme D Brand
- Laboratório de Síntese e Análise de Biomoléculas, Instituto de Química, Universidade de Brasília, UnB, Brasília DF 70910-900, Brasil
| | - Paula Gameiro
- LAQV/Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências da, Universidade do Porto, 4050-313 Porto, Portugal
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17
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Campelo Y, Ombredane A, Vasconcelos AG, Albuquerque L, Moreira DC, Plácido A, Rocha J, Hilarion Fokoue H, Yamaguchi L, Mafud A, Mascarenhas YP, Delerue-Matos C, Borges T, Joanitti GA, Arcanjo D, Kato MJ, Kuckelhaus SAS, Silva MPN, Moraes JD, Leite JRSA. Structure⁻Activity Relationship of Piplartine and Synthetic Analogues against Schistosoma mansoni and Cytotoxicity to Mammalian Cells. Int J Mol Sci 2018; 19:E1802. [PMID: 29921756 PMCID: PMC6032158 DOI: 10.3390/ijms19061802] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 12/30/2017] [Revised: 02/23/2018] [Accepted: 02/27/2018] [Indexed: 01/11/2023] Open
Abstract
Schistosomiasis, caused by helminth flatworms of the genus Schistosoma, is an infectious disease mainly associated with poverty that affects millions of people worldwide. Since treatment for this disease relies only on the use of praziquantel, there is an urgent need to identify new antischistosomal drugs. Piplartine is an amide alkaloid found in several Piper species (Piperaceae) that exhibits antischistosomal properties. The aim of this study was to evaluate the structure–function relationship between piplartine and its five synthetic analogues (19A, 1G, 1M, 14B and 6B) against Schistosoma mansoni adult worms, as well as its cytotoxicity to mammalian cells using murine fibroblast (NIH-3T3) and BALB/cN macrophage (J774A.1) cell lines. In addition, density functional theory calculations and in silico analysis were used to predict physicochemical and toxicity parameters. Bioassays revealed that piplartine is active against S. mansoni at low concentrations (5⁻10 µM), but its analogues did not. In contrast, based on 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and flow cytometry assays, piplartine exhibited toxicity in mammalian cells at 785 µM, while its analogues 19A and 6B did not reduce cell viability at the same concentrations. This study demonstrated that piplartine analogues showed less activity against S. mansoni but presented lower toxicity than piplartine.
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Affiliation(s)
- Yuri Campelo
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Universidade Federal do Piauí, UFPI, Parnaíba-PI, 64202-020 Brazil.
- Programa de Pós-Graduação em Biotecnologia, RENORBIO, Ponto focal Universidade Federal do Piauí, UFPI, Teresina, PI, 64049-550, Brazil.
- Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP, Parnaíba-PI, 64212-790, Brazil.
| | - Alicia Ombredane
- Laboratório de Nanobiotecnologia, Instituto de Biologia, Campus Darcy Ribeiro, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Andreanne G Vasconcelos
- Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Lucas Albuquerque
- Laboratorio de Imunologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Daniel C Moreira
- Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Alexandra Plácido
- LAQV/REQUIMTE, GRAQ, Instituto Superior de Engenha do Porto, ISEP, Porto 4200-072, Portugal.
| | - Jefferson Rocha
- Programa de Pós-Graduação em Biotecnologia, RENORBIO, Ponto focal Universidade Federal do Piauí, UFPI, Teresina, PI, 64049-550, Brazil.
| | - Harold Hilarion Fokoue
- Laboratório de Avaliação e Síntese de Substâncias Bioativas, Universidade Federal do Rio de Janeiro, CCS, Cidade Universitária, Rio de Janeiro-RJ 21941-902, Brasil.
| | - Lydia Yamaguchi
- Instituto de Química, Universidade de São Paulo, São Paulo-SP 01005-010, Brazil.
| | - Ana Mafud
- Instituto de Física de São Carlos, Universidade de São Paulo-SP 01005-010, Brazil.
| | - Yvonne P Mascarenhas
- Instituto de Física de São Carlos, Universidade de São Paulo-SP 01005-010, Brazil.
| | - Cristina Delerue-Matos
- LAQV/REQUIMTE, GRAQ, Instituto Superior de Engenha do Porto, ISEP, Porto 4200-072, Portugal.
| | - Tatiana Borges
- Laboratorio de Imunologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Graziella A Joanitti
- Laboratório de Nanobiotecnologia, Instituto de Biologia, Campus Darcy Ribeiro, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Daniel Arcanjo
- Núcleo de Pesquisas em Plantas Medicinais, NPPM, Universidade Federal do Piauí, UFPI, Parnaíba-PI 64202-020, Brazil.
| | - Massuo J Kato
- Instituto de Química, Universidade de São Paulo, São Paulo-SP 01005-010, Brazil.
| | - Selma A S Kuckelhaus
- Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
| | - Marcos P N Silva
- Núcleo de Pesquisa em Doenças Negligenciadas, Universidade de Guarulhos, Guarulhos-SP 07023-070, Brazil.
| | - Josué de Moraes
- Núcleo de Pesquisa em Doenças Negligenciadas, Universidade de Guarulhos, Guarulhos-SP 07023-070, Brazil.
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Universidade Federal do Piauí, UFPI, Parnaíba-PI, 64202-020 Brazil.
- Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília-DF 70910-900, Brazil.
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18
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Barbosa EA, Oliveira A, Plácido A, Socodato R, Portugal CC, Mafud AC, Ombredane AS, Moreira DC, Vale N, Bessa LJ, Joanitti GA, Alves C, Gomes P, Delerue-Matos C, Mascarenhas YP, Marani MM, Relvas JB, Pintado M, Leite JRSA. Structure and function of a novel antioxidant peptide from the skin of tropical frogs. Free Radic Biol Med 2018; 115:68-79. [PMID: 29162516 DOI: 10.1016/j.freeradbiomed.2017.11.001] [Citation(s) in RCA: 38] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 10/30/2017] [Accepted: 11/01/2017] [Indexed: 11/28/2022]
Abstract
The amphibian skin plays an important role protecting the organism from external harmful factors such as microorganisms or UV radiation. Based on biorational strategies, many studies have investigated the cutaneous secretion of anurans as a source of bioactive molecules. By a peptidomic approach, a novel antioxidant peptide (AOP) with in vitro free radical scavenging ability was isolated from Physalaemus nattereri. The AOP, named antioxidin-I, has a molecular weight [M+H]+ = 1543.69Da and a TWYFITPYIPDK primary amino acid sequence. The gene encoding the antioxidin-I precursor was expressed in the skin tissue of three other Tropical frog species: Phyllomedusa tarsius, P. distincta and Pithecopus rohdei. cDNA sequencing revealed highly homologous regions (signal peptide and acidic region). Mature antioxidin-I has a novel primary sequence with low similarity compared with previously described amphibian's AOPs. Antioxidin-I adopts a random structure even at high concentrations of hydrophobic solvent, it has poor antimicrobial activity and poor performance in free radical scavenging assays in vitro, with the exception of the ORAC assay. However, antioxidin-I presented a low cytotoxicity and suppressed menadione-induced redox imbalance when tested with fibroblast in culture. In addition, it had the capacity to substantially attenuate the hypoxia-induced production of reactive oxygen species when tested in hypoxia exposed living microglial cells, suggesting a potential neuroprotective role for this peptide.
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Affiliation(s)
- Eder Alves Barbosa
- Laboratório de Espectrometria de Massa, EMBRAPA Recursos Genéticos e Biotecnologia, Brasília, Brazil; Laboratório de Síntese e Análise de Biomoléculas, Instituto de Química, Universidade de Brasília, Brasília, Brazil
| | - Ana Oliveira
- Centro de Biotecnologia e Química Fina, CBQF, Universidade Católica Portuguesa, Rua Arquiteto Lobão Vital Apartado, 2511, Asprela, Porto, Portugal
| | - Alexandra Plácido
- LAQV/REQUIMTE, GRAQ, Instituto Superior de Engenha do Porto, ISEP, Porto, Portugal
| | - Renato Socodato
- Glial Cell Biology Lab, Instituto de Investigação e Inovação em Saúde and Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Camila C Portugal
- Glial Cell Biology Lab, Instituto de Investigação e Inovação em Saúde and Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Ana Carolina Mafud
- Instituto de Física de São Carlos, IFSC, Universidade de São Paulo, USP, São Carlos, SP, Brazil; Dept Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Basel 4051, Switzerland
| | - Alicia S Ombredane
- Laboratório de Nanobiotecnologia, Instituto de Biologia, Campus Darcy Ribeiro, UnB, Brasília, DF, Brazil
| | - Daniel C Moreira
- Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, DF, Brazil
| | - Nuno Vale
- UCIBIO/REQUIMTE, Laboratório de Farmacologia, Departamento de Ciências do Medicamento, Faculdade de Farmácia da Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Lucinda J Bessa
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Graziella A Joanitti
- Laboratório de Nanobiotecnologia, Instituto de Biologia, Campus Darcy Ribeiro, UnB, Brasília, DF, Brazil; Campus Ceilândia, Centro Metropolitano, UnB, Ceilândia, Brasília, DF, Brazil
| | - Cláudia Alves
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Paula Gomes
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | | | | | - Mariela M Marani
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Argentina
| | - João B Relvas
- Glial Cell Biology Lab, Instituto de Investigação e Inovação em Saúde and Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Manuela Pintado
- Centro de Biotecnologia e Química Fina, CBQF, Universidade Católica Portuguesa, Rua Arquiteto Lobão Vital Apartado, 2511, Asprela, Porto, Portugal
| | - José Roberto S A Leite
- Glial Cell Biology Lab, Instituto de Investigação e Inovação em Saúde and Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal; Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, DF, Brazil.
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19
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Arcanjo DDR, Vasconcelos AG, Nascimento LA, Mafud AC, Plácido A, Alves MMM, Delerue-Matos C, Bemquerer MP, Vale N, Gomes P, Oliveira EB, Lima FCA, Mascarenhas YP, Carvalho FAA, Simonsen U, Ramos RM, Leite JRSA. Structure-function studies of BPP-BrachyNH 2 and synthetic analogues thereof with Angiotensin I-Converting Enzyme. Eur J Med Chem 2017; 139:401-411. [PMID: 28810191 DOI: 10.1016/j.ejmech.2017.08.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 08/04/2017] [Accepted: 08/06/2017] [Indexed: 10/19/2022]
Abstract
The vasoactive proline-rich oligopeptide termed BPP-BrachyNH2 (H-WPPPKVSP-NH2) induces in vitro inhibitory activity of angiotensin I-converting enzyme (ACE) in rat blood serum. In the present study, the removal of N-terminal tryptophan or C-terminal proline from BPP-BrachyNH2 was investigated in order to predict which structural components are important or required for interaction with ACE. Furthermore, the toxicological profile was assessed by in silico prediction and in vitro MTT assay. Two BPP-BrachyNH2 analogues (des-Trp1-BPP-BrachyNH2 and des-Pro8-BPP-BrachyNH2) were synthesized, and in vitro and in silico ACE inhibitory activity and toxicological profile were assessed. The des-Trp1-BPP-BrachyNH2 and des-Pro8-BPP-BrachyNH2 were respectively 3.2- and 29.5-fold less active than the BPP-BrachyNH2-induced ACE inhibitory activity. Molecular Dynamic and Molecular Mechanics Poisson-Boltzmann Surface Area simulations (MM-PBSA) demonstrated that the ACE/BBP-BrachyNH2 complex showed lower binding and van der Wall energies than the ACE/des-Pro8-BPP-BrachyNH2 complex, therefore having better stability. The removal of the N-terminal tryptophan increased the in silico predicted toxicological effects and cytotoxicity when compared with BPP-BrachyNH2 or des-Pro8-BPP-BrachyNH2. Otherwise, des-Pro8-BPP-BrachyNH2 was 190-fold less cytotoxic than BPP-BrachyNH2. Thus, the removal of C-terminal proline residue was able to markedly decrease both the BPP-BrachyNH2-induced ACE inhibitory and cytotoxic effects assessed by in vitro and in silico approaches. In conclusion, the aminoacid sequence of BPP-BrachyNH2 is essential for its ACE inhibitory activity and associated with an acceptable toxicological profile. The perspective of the interactions of BPP-BrachyNH2 with ACE found in the present study can be used for development of drugs with differential therapeutic profile than current ACE inhibitors.
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Affiliation(s)
- Daniel D R Arcanjo
- Núcleo de Pesquisa Em Biodiversidade e Biotecnologia - BIOTEC, Campus Ministro Reis Velloso - CMRV, Universidade Federal do Piauí, UFPI, 642020-020, Parnaíba, PI, Brazil; Núcleo de Pesquisas Em Plantas Medicinais - NPPM, Universidade Federal do Piauí - UFPI, Campus Ministro Petrônio Portella, SG-15, Ininga, 64049-550, Teresina, PI, Brazil
| | - Andreanne G Vasconcelos
- Núcleo de Pesquisa Em Biodiversidade e Biotecnologia - BIOTEC, Campus Ministro Reis Velloso - CMRV, Universidade Federal do Piauí, UFPI, 642020-020, Parnaíba, PI, Brazil
| | - Lucas A Nascimento
- Laboratório de Pesquisa Em Sistemas de Informação, LaPeSI, Departamento de Informação, Ambiente, Saúde e Produção Alimentícia, Instituto Federal do Piauí, Teresina, Brazil; Grupo de Química Quântica Computacional e Planejamento de Fármaco, GQQCPF, Departamento de Química, Universidade Estadual do Piauí, Teresina, Brazil
| | - Ana Carolina Mafud
- Instituto de Física de São Carlos - IFSC, Universidade de São Paulo - USP, São Carlos, SP, Brazil; Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Alexandra Plácido
- LAQV/REQUIMTE, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal
| | - Michel M M Alves
- Núcleo de Pesquisas Em Plantas Medicinais - NPPM, Universidade Federal do Piauí - UFPI, Campus Ministro Petrônio Portella, SG-15, Ininga, 64049-550, Teresina, PI, Brazil
| | - Cristina Delerue-Matos
- LAQV/REQUIMTE, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal
| | - Marcelo P Bemquerer
- EMBRAPA Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final), 70770-917, Brasília, DF, Brazil
| | - Nuno Vale
- UCIBIO/REQUIMTE, Laboratório de Farmacologia, Departamento de Ciências do Medicamento, Faculdade de Farmácia da Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Paula Gomes
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
| | - Eduardo B Oliveira
- Departamento de Bioquímica e Imunologia, Universidade de São Paulo, Ribeirão Preto, São Paulo, 14096000, Brazil
| | - Francisco C A Lima
- Grupo de Química Quântica Computacional e Planejamento de Fármaco, GQQCPF, Departamento de Química, Universidade Estadual do Piauí, Teresina, Brazil
| | - Yvonne P Mascarenhas
- Instituto de Física de São Carlos - IFSC, Universidade de São Paulo - USP, São Carlos, SP, Brazil
| | - Fernando Aécio A Carvalho
- Núcleo de Pesquisas Em Plantas Medicinais - NPPM, Universidade Federal do Piauí - UFPI, Campus Ministro Petrônio Portella, SG-15, Ininga, 64049-550, Teresina, PI, Brazil
| | - Ulf Simonsen
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark
| | - Ricardo M Ramos
- Laboratório de Pesquisa Em Sistemas de Informação, LaPeSI, Departamento de Informação, Ambiente, Saúde e Produção Alimentícia, Instituto Federal do Piauí, Teresina, Brazil.
| | - José Roberto S A Leite
- Núcleo de Pesquisa Em Biodiversidade e Biotecnologia - BIOTEC, Campus Ministro Reis Velloso - CMRV, Universidade Federal do Piauí, UFPI, 642020-020, Parnaíba, PI, Brazil; Área de Morfologia, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, DF, Brazil
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20
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Oliveira M, Gomes-Alves AG, Sousa C, Mirta Marani M, Plácido A, Vale N, Delerue-Matos C, Gameiro P, Kückelhaus SAS, Tomas AM, S A Leite JR, Eaton P. Ocellatin-PT antimicrobial peptides: High-resolution microscopy studies in antileishmania models and interactions with mimetic membrane systems. Biopolymers 2017; 105:873-86. [PMID: 27463422 DOI: 10.1002/bip.22925] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 05/27/2016] [Revised: 07/21/2016] [Accepted: 07/22/2016] [Indexed: 01/07/2023]
Abstract
Although the mechanism of action of antimicrobial peptides (AMPs) is not clear, they can interact electrostatically with the cell membranes of microorganisms. New ocellatin-PT peptides were recently isolated from the skin secretion of Leptodactylus pustulatus. The secondary structure of these AMPs and their effect on Leishmania infantum cells, and on different lipid surface models was characterized in this work. The results showed that all ocellatin-PT peptides have an α-helix structure and five of them (PT3, PT4, PT6 to PT8) have leishmanicidal activity; PT1 and PT2 affected the cellular morphology of the parasites and showed greater affinity for leishmania and bacteria-mimicking lipid membranes than for those of mammals. The results show selectivity of ocellatin-PTs to the membranes of microorganisms and the applicability of biophysical methods to clarify the interaction of AMPs with cell membranes.
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Affiliation(s)
- Mayara Oliveira
- Programa de Pós-Graduação em Medicina Tropical, Núcleo de Medicina Tropical, NMT, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brazil.,Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200, Portugal
| | - Ana Georgina Gomes-Alves
- IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal.,UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal.,CEB, Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, Braga, 4710-057, Portugal
| | - Carla Sousa
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200, Portugal
| | - Mariela Mirta Marani
- PEEC ? CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Chubut, Argentina
| | - Alexandra Plácido
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Porto, Portugal
| | - Nuno Vale
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200, Portugal
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Porto, Portugal
| | - Paula Gameiro
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200, Portugal
| | - Selma A S Kückelhaus
- Programa de Pós-Graduação em Medicina Tropical, Núcleo de Medicina Tropical, NMT, Faculdade de Medicina, Universidade de Brasília, Brasília, DF, Brazil.,Departmento de Morfologia, Faculdade de Medicina, Universidade de Brasília, Brasilia, Brazil
| | - Ana M Tomas
- IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal.,UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal.,ICBAS, Instituto de Ciencias Biomedicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - José Roberto S A Leite
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200, Portugal.,Departmento de Morfologia, Faculdade de Medicina, Universidade de Brasília, Brasilia, Brazil.,Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
| | - Peter Eaton
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200, Portugal. .,Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil.
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21
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Andrade EB, Lima TGP, Araújo KDC, Leite JRSA, Weber LN. Sympatric occurrence of two species of Pseudopaludicola (Anura: Leptodactylidae) and first record of Pseudopaludicola jaredi Andrade, Magalhães, Nunes-de-Almeida, Veiga-Menoncello, Santana, Garda, Loebmann, Recco-Pimentel, Giaretta & Toledo, 2016 in the state of Maranhão, northeastern Brazil. cl 2016. [DOI: 10.15560/12.6.2023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Here, we document the sympatric occurrence of Pseudopaludicola canga and P. jaredi. We also provide the first record of P. jaredi in the state of Maranhão, northeastern Brazil, expanding this species’ distribution by about 610 km southwestward from Serra das Flores, municipality of Viçosa do Ceará, state of Ceará. Furthermore, we fill the gap in the geographic distribution range of P. canga in the state of Maranhão, extending the distribution of this species by about 530 km southwestward from the municipality of Barreirinhas.
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22
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Cardoso VS, de Carvalho Filgueiras M, Dutra YM, Teles RHG, de Araújo AR, Primo FL, Mafud AC, Batista LF, Mascarenhas YP, Paino IMM, Zucolotto V, Tedesco AC, Silva DA, Leite JRSA, Dos Santos JR. Collagen-based silver nanoparticles: Study on cell viability, skin permeation, and swelling inhibition. Mater Sci Eng C Mater Biol Appl 2016; 74:382-388. [PMID: 28254308 DOI: 10.1016/j.msec.2016.12.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 11/24/2016] [Accepted: 12/04/2016] [Indexed: 11/27/2022]
Abstract
Collagen is considered the most abundant protein in the animal kingdom, comprising 30% of the total amount of proteins and 6% of the human body by weight. Studies that examine the interaction between silver nanoparticles and proteins have been highlighted in the literature in order to understand the stability of the nanoparticle system, the effects observed in biological systems, and the appearance of new chemical pharmaceutical products. The objective of this study was to analyze the behavior of silver nanoparticles stabilized with collagen (AgNPcol) and to check the skin permeation capacity and action in paw edema induced by carrageenan. AgNPcol synthesis was carried out using solutions of reducing agent sodium borohydride (NaBH4), silver nitrate (AgNO3) and collagen. Characterization was done by using dynamic light scattering (DLS) and X-ray diffraction (XRD) and AFM. Cellular viability testing was performed by using flow cytometry in human melanoma cancer (MV3) and murine fibroblast (L929) cells. The skin permeation study was conducted using a Franz diffusion cell, and the efficiency of AgNPcol against the formation of paw edema in mice was evaluated. The hydrodynamic diameter and zeta potential of AgNPcol were 140.7±7.8nm and 20.1±0.7mV, respectively. AgNPcol failed to induce early apoptosis, late apoptosis, and necrosis in L929 cells; however, it exhibited enhanced toxicity in cancer cells (MV3) compared to normal cells (L929). AgNPcol demonstrated increased toxicological effects in cancer MV3 cells, promoting skin permeation, and preventing paw edema.
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Affiliation(s)
- Vinicius Saura Cardoso
- Research Center in Biodiversity and Biotechnology, Biotec, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil; Physiotherapy Department, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil.
| | - Marcelo de Carvalho Filgueiras
- Physiotherapy Department, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil; Morphology and Muscle Physiology Laboratory, LAMFIM, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil
| | - Yago Medeiros Dutra
- Physiotherapy Department, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil; Morphology and Muscle Physiology Laboratory, LAMFIM, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil
| | - Ramon Handerson Gomes Teles
- Physiotherapy Department, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil; Morphology and Muscle Physiology Laboratory, LAMFIM, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil
| | - Alyne Rodrigues de Araújo
- Research Center in Biodiversity and Biotechnology, Biotec, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil
| | - Fernando Lucas Primo
- Faculdade de Ciências Farmacêuticas, UNESP, Universidade Estadual Paulista, Campus de Araraquara, Departamento de Bioprocessos e Biotecnologia, 14800903 Araraquara, São Paulo, Brazil
| | - Ana Carolina Mafud
- Institute of Physics of São Carlos, IFSC, University of São Paulo, USP, 13566590 São Carlos, SP, Brazil
| | - Larissa Fernandes Batista
- Institute of Physics of São Carlos, IFSC, University of São Paulo, USP, 13566590 São Carlos, SP, Brazil
| | | | - Iêda Maria Martinez Paino
- Nanomedicine and Nanotoxicology Group, Institute of Physics of São Carlos, IFSC, University of São Paulo, USP, 13566-590 São Carlos, SP, Brazil
| | - Valtencir Zucolotto
- Nanomedicine and Nanotoxicology Group, Institute of Physics of São Carlos, IFSC, University of São Paulo, USP, 13566-590 São Carlos, SP, Brazil
| | - Antonio Claudio Tedesco
- Departamento de Química, Laboratório de Fotobiologia e Fotomedicina, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, USP, 14040901 Ribeirão Preto, SP, Brazil
| | - Durcilene Alves Silva
- Research Center in Biodiversity and Biotechnology, Biotec, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil
| | - José Roberto S A Leite
- Research Center in Biodiversity and Biotechnology, Biotec, Campus Ministro Reis Velloso, Federal University of Piauí, UFPI, 64202020 Parnaíba, Piauí, Brazil; Área de Morfologia, Faculdade de Medicina, FM, Universidade de Brasília, UnB, Campus Universitário Darcy Ribeiro, Brasília, 70910900, Distrito Federal, Brazil
| | - José Ribeiro Dos Santos
- Department of Chemistry, Campus Teresina, Federal University of Piauí, 64049-550 Teresina, Piauí, Brazil
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23
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Quelemes PV, Perfeito MLG, Guimarães MA, dos Santos RC, Lima DF, Nascimento C, Silva MPN, Soares MJDS, Ropke CD, Eaton P, de Moraes J, Leite JRSA. Effect of neem (Azadirachta indica A. Juss) leaf extract on resistant Staphylococcus aureus biofilm formation and Schistosoma mansoni worms. J Ethnopharmacol 2015; 175:287-294. [PMID: 26408045 DOI: 10.1016/j.jep.2015.09.026] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 08/05/2015] [Accepted: 09/19/2015] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE There are ethnopharmacological reports supporting the use of neem (Azadirachta indica A. Juss) leaf against bacterial and worm infections. However there is a lack of studies about its effect on bacterial biofilm formation and Schistosoma mansoni worms. This study reports the in vitro effects of neem leaf ethanolic extract (Neem EE) on Methicillin-resistant Staphylococcus aureus (MRSA) biofilm and planktonic aggregation formation, and against S. mansoni worms. MATERIALS AND METHODS Quantification of the Azadirachtin (AZA), thought to be one of their main compounds related to biological effects, was performed. The effect of sub-inhibitory concentrations of Neem EE on biofilm formation and planktonic aggregates of S. aureus was tested using the crystal violet dye method and atomic force microscopy (AFM) analysis, respectively. Changes in S. mansoni motor activity and death of worms were analyzed in vitro after exposition to the extract. Treated schistosomes were also examined using confocal laser scanning microscopy. RESULTS It was observed the presence of AZA in the extract (0.14 ± 0.02 mg/L). Testing Neem EE sub-inhibitory concentrations, a significant biofilm adherence inhibition from 62.5 µg/mL for a sensitive S. aureus and 125 µg/mL for two MRSA strains was observed. AFM images revealed that as the Neem EE concentration increases (from 250 to 1000 µg/mL) decreased ability of a chosen MRSA strain to form large aggregates. In relation of anti-schistosoma assay, the extract caused 100% mortality of female worms at a concentration of 50 µg/mL at 72 h of incubation, while 300 µg/mL at 24h of incubation was required to achieve 100% mortality of male worms. The extract also caused significant motor activity reduction in S. mansoni. For instance, at 96 h of incubation with 100 µg/mL, 80% of the worms presented significant motor activity reduction. By the confocal microscopy analysis, the dorsal surface of the tegument of worms exposed to 300 µg/mL (male) and 100 µg/mL (female) of the extract showed severe morphological changes after 24h of treatment. CONCLUSIONS Neem leaf ethanolic extract presented inhibitory effect on MRSA biofilm and planktonic aggregation formation, and anthelmintic activity against S. mansoni worms.
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Affiliation(s)
- Patrick V Quelemes
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil
| | - Márcia L G Perfeito
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil
| | - Maria A Guimarães
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil
| | - Raimunda C dos Santos
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil
| | - David F Lima
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil; Federal University of Vale do São Francisco, UNIVASF, Paulo Afonso, BA, Brazil
| | - Carlos Nascimento
- Laboratory of Parasitology, Instituto Butantan, São Paulo, SP, Brazil
| | - Marcos P N Silva
- Center for Research on Neglected Diseases, University of Guarulhos, Guarulhos, SP, Brazil
| | - Maria José dos S Soares
- Department of Veterinary Morphophysiology, Federal University of Piauí, Teresina, PI 64049550, Brazil
| | - Cristina D Ropke
- Phytobios, Pesquisa, Desenvolvimento e Inovação, Barueri, SP, Brazil
| | - Peter Eaton
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil; UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Josué de Moraes
- Center for Research on Neglected Diseases, University of Guarulhos, Guarulhos, SP, Brazil
| | - José Roberto S A Leite
- Biodiversity and Biotechnology Research Center, Biotec, Federal University of Piauí, UFPI, 64202020 Parnaíba, PI, Brazil.
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24
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Araújo TSL, Costa DS, Sousa NA, Souza LKM, de Araújo S, Oliveira AP, Sousa FBM, Silva DA, Barbosa ALR, Leite JRSA, Medeiros JVR. Antidiarrheal activity of cashew GUM, a complex heteropolysaccharide extracted from exudate of Anacardium occidentale L. in rodents. J Ethnopharmacol 2015; 174:299-307. [PMID: 26297843 DOI: 10.1016/j.jep.2015.08.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [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: 05/21/2015] [Revised: 07/18/2015] [Accepted: 08/18/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Anacardium occidentale L. (Anacardiaceae) is commonly known as the cashew tree. It is native to tropical America and extracts of the leaves, bark, roots, chestnut net and exudate have been traditionally used in northeast Brazil for the treatment of various diseases. The exudate of the cashew tree (cashew gum) has been exploited by locals since ancient times for multiple applications, including the treatment of diarrheal diseases. AIM OF THE STUDY The primary aim of the present study is to evaluate the antidiarrheal activity of cashew gum (CG), a complex heteropolysaccharide from the exudate of the cashew tree, using various models. MATERIALS AND METHODS The antidiarrheal activity of cashew gum (CG) against acute diarrhea was investigated using the castor oil-induced diarrhea model. The effects of CG on gastrointestinal transit and castor oil- and PGE2- induced enteropooling were also examined in rodents. In addition, the effect of CG against secretory diarrhea was investigated using a model of fluid secretion in cholera toxin-treated intestinal closed loops in live mice. RESULTS Cashew gum (30, 60, and 90 mg/kg, p.o.) showed a significant (P<0.05-0.01) antidiarrheal effect in rats with castor oil-induced diarrhea, inhibiting the total amount of stool and diarrheal stools. The 60 mg/kg dose of CG exhibited excellent antidiarrheal activity and significantly reduced the severity of diarrhea (diarrhea scores) in rats. CG (60 mg/kg) significantly (P<0.05) decreased the volume of castor oil- and PGE2-induced intestinal fluid secretion (enteropooling). In addition, similar to loperamide (standard drug, 5 mg/kg, p.o.), CG treatment reduced the distance traveled by a charcoal meal in the 30-min gastrointestinal transit model by interacting with opioid receptors. In cholera toxin-induced secretory diarrhea, CG (60 mg/kg) significantly inhibited the intestinal fluid secretion and decreased Cl(-) ion loss in the cholera toxin(-)treated isolated loops model of live mice by competitively binding to cholera toxin-GM1 receptors. CONCLUSIONS In conclusion, our results indicate that a complex heteropolysaccharide extracted from the exudate of A. occidentale L. has antidiarrheal activity in acute, inflammatory, and secretory diarrhea models, which could justify its traditional use in the treatment of diarrhea in northeast Brazil. The antidiarrheal activity might be explained by the capacity of CG to inhibit gastrointestinal motility and thereby reduce the accumulation of intestinal fluid and the secretion of water and chloride ions in the lumen of the intestine.
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Affiliation(s)
- Thiago S L Araújo
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Douglas S Costa
- Medicinal Plant Research Center, NPPM, Post-graduation Program in Pharmacology, Federal University of Piauí, Teresina, Piauí, Brazil
| | - Nayara A Sousa
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Luan K M Souza
- Post-graduation Program in Biomedical Sciences, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Simone de Araújo
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Ana Patrícia Oliveira
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Francisca Beatriz M Sousa
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Durcilene A Silva
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - André L R Barbosa
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil; Medicinal Plant Research Center, NPPM, Post-graduation Program in Pharmacology, Federal University of Piauí, Teresina, Piauí, Brazil; Post-graduation Program in Biomedical Sciences, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - José Roberto S A Leite
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil; Medicinal Plant Research Center, NPPM, Post-graduation Program in Pharmacology, Federal University of Piauí, Teresina, Piauí, Brazil; Post-graduation Program in Biomedical Sciences, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Jand Venes R Medeiros
- Biotechnology and Biodiversity Center Research, BIOTEC, Post-graduation Program in Biotechnology, Federal University of Piauí, Parnaíba, Piauí, Brazil; Medicinal Plant Research Center, NPPM, Post-graduation Program in Pharmacology, Federal University of Piauí, Teresina, Piauí, Brazil; Post-graduation Program in Biomedical Sciences, Federal University of Piauí, Parnaíba, Piauí, Brazil.
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Lima TGP, Andrade EB, Araújo KDC, Leite JRSA, Weber LN. First record of Leptodactylus sertanejo (Anura: Leptodactylidae: Leptodactylinae) in the state of Maranhão, northeastern Brazil. cl 2015. [DOI: 10.15560/11.5.1776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Leptodactylus sertanejo is a mid-sized frog that inhabits areas of the Cerrado Biome, in natural and artificial grassland areas, in the states of Minas Gerais, São Paulo, Bahia, Goiás and Tocantins, Brazil. Herein, we provide the first species record for the state of Maranhão, northeastern Brazil, expanding the known distribution of L. sertanejo ca. 420 km northeast from the Parque Estadual do Jalapão, Tocantins state.
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Marani MM, Dourado FS, Quelemes PV, de Araujo AR, Perfeito MLG, Barbosa EA, Véras LMC, Coelho ALR, Andrade EB, Eaton P, Longo JPF, Azevedo RB, Delerue-Matos C, Leite JRSA. Characterization and Biological Activities of Ocellatin Peptides from the Skin Secretion of the Frog Leptodactylus pustulatus. J Nat Prod 2015; 78:1495-1504. [PMID: 26107622 DOI: 10.1021/np500907t] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Eight new peptides were isolated from the skin secretion of the frog Leptodactylus pustulatus and their amino acid sequences determined by de novo sequencing and by cDNA cloning. Structural similarities between them and other antimicrobial peptides from the skin secretion of Leptodactylus genus frogs were found. Ocellatins-PT1 to -PT5 (25 amino acid residues) are amidated at the C-terminus, while ocellatins-PT6 to -PT8 (32 amino acid residues) have free carboxylates. Antimicrobial activity, hemolytic tests, and cytotoxicity against a murine fibroblast cell line were investigated. All peptides, except for ocellatin-PT2, have antimicrobial activity against at least one Gram-negative strain. Ocellatin-PT8 inhibited the growth of Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Salmonella choleraesuis strains with MICs in the 60-240 μM range. No significant effect was observed in human erythrocytes and in a murine fibroblast cell line after exposure to the peptides at MICs. A comparison between sequences obtained by both direct HPLC-MS de novo sequencing and cDNA cloning demonstrates the secretion of mature peptides derived from a pre-pro-peptide structure.
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Affiliation(s)
- Mariela Mirta Marani
- †CENPAT-CONICET, Centro Nacional Patagónico, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Chubut, Argentina
| | - Flávio Santos Dourado
- ‡Secretaria de Vigilância em Saúde, Ministério da Saúde, SVS/MS, Brasília, DF, Brazil
| | - Patrick Veras Quelemes
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
| | - Alyne Rodrigues de Araujo
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
| | - Márcia Luana Gomes Perfeito
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
| | - Eder Alves Barbosa
- ⊥Programa de Pós-Graduação em Biologia Molecular, Departamento de Biologia Molecular, Universidade de Brasília, Brasília, DF, Brazil
| | - Leiz Maria Costa Véras
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
| | - Andreia Luísa Rodrigues Coelho
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
- ∥REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Porto, Portugal
| | - Etielle Barroso Andrade
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
- ∇Programa de Pós-Graduação em Biodiversidade e Biotecnologia, BIONORTE, Universidade Federal do Maranhão, UFMA, São Luís, MA, Brazil
| | - Peter Eaton
- ○UCIBIO, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - João Paulo Figueiró Longo
- #Department of Genetics and Morphology, Institute of Biological Sciences, Universidade de Brasília, Brasilia, Brazil
| | - Ricardo Bentes Azevedo
- #Department of Genetics and Morphology, Institute of Biological Sciences, Universidade de Brasília, Brasilia, Brazil
| | - Cristina Delerue-Matos
- ∥REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Porto, Portugal
| | - José Roberto S A Leite
- §Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Biotec, Campus Ministro Reis Velloso, Universidade Federal do Piauí, UFPI, Parnaiba, PI, Brazil
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Carvalho NS, Silva MM, Silva RO, Nicolau LAD, Sousa FBM, Damasceno SRB, Silva DA, Barbosa ALR, Leite JRSA, Medeiros JVR. Gastroprotective properties of cashew gum, a complex heteropolysaccharide of Anacardium occidentale, in naproxen-induced gastrointestinal damage in rats. Drug Dev Res 2015; 76:143-51. [PMID: 25959135 DOI: 10.1002/ddr.21250] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [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: 02/20/2015] [Accepted: 03/26/2015] [Indexed: 11/10/2022]
Abstract
Long-term use nonsteroidal anti-inflammatory drug is associated with gastrointestinal (GI) lesion formation. The aim of this study was to investigate the protective activity of cashew gum (CG), a complex heteropolysaccharide extracted from Anacardium occidentale on naproxen (NAP)-induced GI damage. Male Wistar rats were pretreated with vehicle or CG (1, 3, 10, and 30 mg/kg, p.o.) twice daily for 2 days; after 1 h, NAP (80 mg/kg, p.o.) was administered. The rats were euthanized on the 2nd day of treatment, 4 h after NAP administration. Stomach lesions were measured using digital calipers. The medial small intestine was used for the evaluation of macroscopic lesion scores. Samples of the stomach and the intestine were used for histological evaluation, and assays for glutathione (GSH), malonyldialdehyde (MDA), and myeloperoxidase (MPO). Additional rats were used to measure gastric mucus and secretion. Pretreatment with CG reduced the macroscopic and microscopic damage induced by NAP. CG significantly attenuated NAP-induced alterations in MPO, GSH, and MDA levels. Furthermore, CG returned adherent mucus levels to normal values. These results suggest that CG has a protective effect against GI damage via mechanisms that involve the inhibition of inflammation and increasing the amount of adherent mucus in mucosa.
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Affiliation(s)
- Nathalia S Carvalho
- Post-Graduation Program in Pharmacology, Federal University of Piauí, Teresina, PI, Brazil
| | - Mônica M Silva
- Post-Graduation Program in Biotechnology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, 64204-260, Parnaíba, PI, Brazil
| | - Renan O Silva
- Post-Graduation Program in Pharmacology, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Lucas A D Nicolau
- Post-Graduation Program in Pharmacology, Federal University of Piauí, Teresina, PI, Brazil
| | - Francisca Beatriz M Sousa
- Post-Graduation Program in Biotechnology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, 64204-260, Parnaíba, PI, Brazil
| | - Samara R B Damasceno
- Post-Graduation Program in Pharmacology, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Durcilene A Silva
- Post-Graduation Program in Biotechnology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, 64204-260, Parnaíba, PI, Brazil
| | - André L R Barbosa
- Post-Graduation Program in Pharmacology, Federal University of Piauí, Teresina, PI, Brazil.,Post-Graduation Program in Biotechnology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, 64204-260, Parnaíba, PI, Brazil
| | - José Roberto S A Leite
- Post-Graduation Program in Pharmacology, Federal University of Piauí, Teresina, PI, Brazil.,Post-Graduation Program in Biotechnology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, 64204-260, Parnaíba, PI, Brazil
| | - Jand Venes R Medeiros
- Post-Graduation Program in Pharmacology, Federal University of Piauí, Teresina, PI, Brazil.,Post-Graduation Program in Biotechnology, Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, 64204-260, Parnaíba, PI, Brazil
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28
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Guimarães MA, de Oliveira RN, Véras LMC, Lima DF, Campelo YDM, Campos SA, Kuckelhaus SAS, Pinto PLS, Eaton P, Mafud AC, Mascarenhas YP, Allegretti SM, de Moraes J, Lolić A, Verbić T, Leite JRSA. Anthelmintic activity in vivo of epiisopiloturine against juvenile and adult worms of Schistosoma mansoni. PLoS Negl Trop Dis 2015; 9:e0003656. [PMID: 25816129 PMCID: PMC4376696 DOI: 10.1371/journal.pntd.0003656] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 02/27/2015] [Indexed: 02/02/2023] Open
Abstract
Schistosomiasis is a serious disease currently estimated to affect more that 207 million people worldwide. Due to the intensive use of praziquantel, there is increasing concern about the development of drug-resistant strains. Therefore, it is necessary to search for and investigate new potential schistosomicidal compounds. This work reports the in vivo effect of the alkaloid epiisopiloturine (EPI) against adults and juvenile worms of Schistosoma mansoni. EPI was first purified its thermal behavior and theoretical solubility parameters charaterised. In the experiment, mice were treated with EPI over the 21 days post-infection with the doses of 40 and 200 mg/kg, and 45 days post-infection with single doses of 40, 100 and 300 mg/kg. The treatment with EPI at 40 mg/kg was more effective in adult worms when compared with doses of 100 and 300 mg/kg. The treatment with 40 mg/kg in adult worms reduced parasite burden significantly, lead to reduction in hepatosplenomegaly, reduced the egg burden in faeces, and decreased granuloma diameter. Scanning electron microscopy revealed morphological changes to the parasite tegument after treatment, including the loss of important features. Additionally, the in vivo treatment against juvenile with 40 mg/kg showed a reduction of the total worm burden of 50.2%. Histopathological studies were performed on liver, spleen, lung, kidney and brain and EPI was shown to have a DL50 of 8000 mg/kg. Therefore EPI shows potential to be used in schistosomiasis treatment. This is the first time that schistosomicidal in vivo activity of EPI has been reported.
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Affiliation(s)
- Maria A. Guimarães
- Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Rosimeire N. de Oliveira
- Department of Animal Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil
| | - Leiz M. C. Véras
- Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil
- Graduate Program in Biotechnology, RENORBIO, Focal Point Federal University of Piauí, Teresina, Piauí, Brazil
| | - David F. Lima
- Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil
- Graduate Program in Biotechnology, RENORBIO, Focal Point Federal University of Piauí, Teresina, Piauí, Brazil
- Collegiate Academic Medicine, Federal University of São Francisco Valley, Campus Paulo Afonso, Paulo Afonso, Bahia, Brazil
| | - Yuri D. M. Campelo
- Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil
- Graduate Program in Biotechnology, RENORBIO, Focal Point Federal University of Piauí, Teresina, Piauí, Brazil
| | - Stefano Augusto Campos
- Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil
| | - Selma A. S. Kuckelhaus
- Faculty of Medicine, University of Brasilia, UNB Campus Dacy Ribeiro, Brasília, Distrito Federal, Brazil
| | | | - Peter Eaton
- UCIBIO, REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Portugal
| | - Ana C. Mafud
- Group of Crystallography, Institute of Physics of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Yvonne P. Mascarenhas
- Group of Crystallography, Institute of Physics of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Silmara M. Allegretti
- Department of Animal Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil
| | - Josué de Moraes
- Research Center for Neglected Diseases (NPDN/FACIG), Guarulhos, São Paulo, Brazil
| | | | - Tatjana Verbić
- Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
| | - José Roberto S. A. Leite
- Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil
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29
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Pauli GEN, Araruna FB, Eiras C, Leite JRSA, Chaves OS, Brito Filho SG, de Souza MDFV, Chavero LN, Sartorelli ML, Bechtold IH. Nanostructured layer-by-layer films containing phaeophytin-b: electrochemical characterization for sensing purposes. Mater Sci Eng C Mater Biol Appl 2014; 47:339-44. [PMID: 25492205 DOI: 10.1016/j.msec.2014.11.022] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 09/27/2014] [Accepted: 11/06/2014] [Indexed: 11/30/2022]
Abstract
This paper reports the study and characterization of a new platform for practical applications, where the use of phaeophytin-b (phaeo-b), a compound derived from chlorophyll, was characterized and investigated for sensing purposes. Modified electrodes with nanostructured phaeo-b films were fabricated via the layer-by-layer (LbL) technique, where phaeo-b was assembled with cashew gum, a polysaccharide, or with poly(allylamine) hydrochloride (PAH). The multilayer formation was investigated with UV-Vis spectroscopy by monitoring the absorption band associated to phaeo-b at approximately 410 nm, where distinct molecular interactions between the materials were verified. The morphology of the films was analyzed by atomic force microscopy (AFM). The electrochemical properties through redox behavior of phaeo-b were studied with cyclic voltammetry. The produced films were applied as sensors for hydrogen peroxide (H2O2) detection. In terms of sensing, the cashew/phaeo-b film exhibited the most promising result, with a fast response and broad linear range upon the addition of H2O2. This approach provides a simple and inexpensive method for development of a nonenzymatic electrochemical sensor for H2O2.
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Affiliation(s)
- Gisele Elias Nunes Pauli
- Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, SC 88040900, Brazil
| | - Felipe B Araruna
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Campus Ministro Reis Velloso, CMRV, Universidade Federal do Piauí, UFPI, Parnaíba, Brazil
| | - Carla Eiras
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Campus Ministro Reis Velloso, CMRV, Universidade Federal do Piauí, UFPI, Parnaíba, Brazil; Laboratório Interdisciplinar de Materiais Avançados, LIMAV, CCN, UFPI, Teresina, PI 64049-550, Brazil
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Campus Ministro Reis Velloso, CMRV, Universidade Federal do Piauí, UFPI, Parnaíba, Brazil
| | - Otemberg Souza Chaves
- Programa de Pós-Graduação em Produtos Naturais e Sintéticos Bioativos, Universidade Federal da Paraíba, 58051-970 João Pessoa, Paraíba, Brazil
| | - Severino Gonçalves Brito Filho
- Programa de Pós-Graduação em Produtos Naturais e Sintéticos Bioativos, Universidade Federal da Paraíba, 58051-970 João Pessoa, Paraíba, Brazil
| | - Maria de Fátima Vanderlei de Souza
- Programa de Pós-Graduação em Produtos Naturais e Sintéticos Bioativos, Universidade Federal da Paraíba, 58051-970 João Pessoa, Paraíba, Brazil
| | - Lucas Natálio Chavero
- Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, SC 88040900, Brazil
| | - Maria Luisa Sartorelli
- Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, SC 88040900, Brazil
| | - Ivan H Bechtold
- Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, SC 88040900, Brazil.
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Araruna FB, Quelemes PV, de Faria BEF, Kuckelhaus SAS, Marangoni VS, Zucolotto V, da Silva DA, Júnior JRS, Leite JRSA, Eiras C. Green Synthesis and Characterization of Silver Nanoparticles Reduced and Stabilized by Cashew Tree Gum. ACTA ACUST UNITED AC 2013. [DOI: 10.1166/asem.2013.1366] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Silva VG, Silva RO, Damasceno SRB, Carvalho NS, Prudêncio RS, Aragão KS, Guimarães MA, Campos SA, Véras LMC, Godejohann M, Leite JRSA, Barbosa ALR, Medeiros JVR. Anti-inflammatory and antinociceptive activity of epiisopiloturine, an imidazole alkaloid isolated from Pilocarpus microphyllus. J Nat Prod 2013; 76:1071-7. [PMID: 23734744 DOI: 10.1021/np400099m] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The aim of this study was to investigate the antinociceptive and anti-inflammatory activities of epiisopiloturine (1), an imidazole alkaloid found in the leaves of Pilocarpus microphyllus. The anti-inflammatory activity of 1 was evaluated using several agents that induce paw edema and peritonitis in Swiss mice. Paw tissue and peritoneal fluid samples were obtained to determine myeloperoxidase (MPO) activity or tumor necrosis factor (TNF)-α and interleukin (IL)-1β levels. The antinociceptive activity was evaluated by acetic acid-induced writhing, the hot plate test, and pain induction using formalin. Compared to vehicle treatment, pretreatment with 1 (0.1, 0.3, and 1 mg/kg, ip) of mice significantly reduced carrageenan-induced paw edema (p < 0.05). Furthermore, compound 1 at a dose of 1 mg/kg effectively inhibited edema induced by dextran sulfate, serotonin, and bradykinin, but had no effect on histamine-induced edema. The administration of 1 (1 mg/kg) following carrageenan-induced peritonitis reduced total and differential peritoneal leukocyte counts and also carrageenan-induced paw MPO activity and TNF-α and IL-1β levels in the peritoneal cavity. Pretreatment with 1 also reduced acetic acid-induced writhing and inhibited the first and second phases of the formalin test, but did not alter response latency in the hot plate test. Pretreatment with naloxone reversed the antinociceptive effect of 1.
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Affiliation(s)
- Valdelânia G Silva
- Biotechnology and Biodiversity Center Research (BIOTEC), Federal University of Piauí, Campus of Parnaíba, Avenida São Sebastião, 64202-020, Parnaíba-PI, Brazil
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Costa TOG, Almeida RA, Melo JT, Koolen HHF, Silva FMAD, Leite JRSA, Prates MV, Bloch Jr. C, Pinto AC. Isolation and amino acid sequencing by MALDI-TOF-MS/MS of a novel antimicrobial anionic peptide from the skin secretion of Osteocephalus taurinus (Anura, Hylidae). J BRAZIL CHEM SOC 2012. [DOI: 10.1590/s0103-50532012001200002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Andrade EB, Guimarães R, Leite Jr JMA, Leite JRSA. Amphibia, Anura, Leptodactylidae, Leptodactylus syphax Bokermann, 1969: distribution extension and geographic distribution map. cl 2011. [DOI: 10.15560/7.5.592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Leptodactylus syphax is a mid-sized frog that inhabits open rocky areas in central, southeastern and northeastern Brazil, besides southern Paraguay and eastern Bolivia. Here we reported an adult male from Parque Municipal Cachoeira do Bota Fora, Piripiri municipality, state of Piauí, northeastern Brazil, expanding the known distribution of Leptodactylus syphax ca. 320 km northwards.
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Freitas FFBP, Fernandes HB, Piauilino CA, Pereira SS, Carvalho KIM, Chaves MH, Soares PMG, Miura LMCV, Leite JRSA, Oliveira RCM, Oliveira FA. Gastroprotective activity of Zanthoxylum rhoifolium Lam. in animal models. J Ethnopharmacol 2011; 137:700-708. [PMID: 21723384 DOI: 10.1016/j.jep.2011.06.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 06/14/2011] [Accepted: 06/15/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The stem barks of Zanthoxylum rhoifolium Lam. (Rutaceae), locally known as "mamica de cadela", are popularly used in dyspepsies, stomachic, tonic, antitumoral, antipyretic and are used in treating flatulence and colic. The objective of this study was to evaluate the gastroprotective effect of the ethanolic extract of Zanthoxylum rhoifolium (EEZR) stem barks in acute gastric lesion models, investigating their possible mechanisms. MATERIALS AND METHODS Mice were used for the evaluation of the acute toxicity, and mice and rats to study the gastroprotective activity. The gastroprotective action of EEZR was analyzed in the absolute ethanol, HCl/ethanol and indomethacin-induced gastric lesion models in mice, hypothermic-restraint stress, and ischemia/reperfusion in rats. In the investigation of the gastroprotective mechanisms of EEZR, the participation of the NO-synthase pathway, ATP-sensitive potassium channels (K(ATP)), the levels of the non-protein sulfhydril groups (NP-SH) and the catalase activity using the ethanol-induced gastric mucosa lesion model and the quantification of the gastric mucus and the antisecretory activity through pylorus ligature model in rats were analyzed. RESULTS The animals did not present any signs of acute toxicity for the EEZR (up to the 4 g/kg dose, po), and it was not possible to calculate the DL(50). EEZR (125-500 mg/kg) exhibited a significant gastroprotective effect in absolute ethanol, HCl/ethanol, hypothermic-restraint stress, and ischemia/reperfusion-induced gastric lesion models. EEZR (250 and 500 mg/kg) exhibited still a gastroprotective activity in the indomethacin-induced ulcer model. Gastroprotection of EEZR was significantly decreased in pre-treated mice with l-NAME or glibenclamide, the respective nitric oxide synthase and K(ATP) channels inhibitors. Our studies revealed that EEZR (500 mg/kg) prevented the decrease of the non-protein sulfhydril groups (NP-SH) and increased the catalase levels in ethanol-treated animals. Furthermore, the extract (500 mg/kg) significantly increased the mucus production, however, the gastric secretion parameters (volume, [H(+)], pH) did not show any alteration. CONCLUSIONS Our results indicate that the ethanolic extract of Zanthoxylum rhoifolium exhibits a significant gastroprotection, because it inhibits the formation of gastric lesions using different models. The release of the nitric oxide, the opening of the K(ATP) channels, the participation of the non-protein sulfhydril groups (NP-SH), catalase and the increase of mucous secretion seem to be involved in the gastroprotection activity of the EEZR. Nevertheless, this activity does not seem to be related to antisecretory mechanisms.
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Affiliation(s)
- F F B P Freitas
- Medicinal Plants Research Center, Federal University of Piauí, Teresina, PI, Brazil
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Salay LC, Nobre TM, Colhone MC, Zaniquelli MED, Ciancaglini P, Stabeli RG, Leite JRSA, Zucolotto V. Dermaseptin 01 as antimicrobial peptide with rich biotechnological potential: study of peptide interaction with membranes containing Leishmania amazonensis lipid-rich extract and membrane models. J Pept Sci 2011; 17:700-7. [PMID: 21805539 DOI: 10.1002/psc.1392] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 05/27/2011] [Accepted: 06/10/2011] [Indexed: 01/26/2023]
Abstract
This article addresses the interactions of the synthetic antimicrobial peptide dermaseptin 01 (GLWSTIKQKGKEAAIAAA- KAAGQAALGAL-NH(2) , DS 01) with phospholipid (PL) monolayers comprising (i) a lipid-rich extract of Leishmania amazonensis (LRE-La), (ii) zwitterionic PL (dipalmitoylphosphatidylcholine, DPPC), and (iii) negatively charged PL (dipalmitoylphosphatidylglycerol, DPPG). The degree of interaction of DS 01 with the different biomembrane models was quantified from equilibrium and dynamic liquid-air interface parameters. At low peptide concentrations, interactions between DS 01 and zwitterionic PL, as well as with the LRE-La monolayers were very weak, whereas with negatively charged PLs the interactions were stronger. For peptide concentrations above 1 µg/ml, a considerable expansion of negatively charged monolayers occurred. In the case of DPPC, it was possible to return to the original lipid area in the condensed phase, suggesting that the peptide was expelled from the monolayer. However, in the case of DPPG, the average area per lipid molecule in the presence of DS 01 was higher than pure PLs even at high surface pressures, suggesting that at least part of DS 01 remained incorporated in the monolayer. For the LRE-La monolayers, DS 01 also remained in the monolayer. This is the first report on the antiparasitic activity of AMPs using Langmuir monolayers of a natural lipid extract from L. amazonensis.
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Affiliation(s)
- Luiz C Salay
- Instituto de Física de São Carlos, IFSC, Universidade de São Paulo, USP, 13560-970 São Carlos, São Paulo, Brazil.
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Zampa MF, Araújo IMS, Costa V, Nery Costa CH, Santos JR, Zucolotto V, Eiras C, Leite JRSA. Leishmanicidal activity and immobilization of dermaseptin 01 antimicrobial peptides in ultrathin films for nanomedicine applications. Nanomedicine 2009; 5:352-8. [PMID: 19215729 DOI: 10.1016/j.nano.2008.11.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Revised: 10/24/2008] [Accepted: 11/03/2008] [Indexed: 11/30/2022]
Abstract
UNLABELLED Antimicrobial peptides (AMPs) are essential for the innate immune system of eukaryotes, imparting protection against pathogens and their proliferation in host organisms. The recent interest in AMPs as active materials in bionanostructures is due to the properties shown by these biological molecules, such as the presence of an alpha-helix structure and distribution of positive charges along the chain. In this study the antimicrobial peptide dermaseptin 01 (DS 01), from the skin secretion of Phyllomedusa hypochondrialis frogs was immobilized in nanostructured layered films in conjunction with nickel tetrasulfonated phthalocyanines. The leishmanicidal activity of DS 01 was confirmed using kinetic essays, in which DS 01 promoted death of all metacyclic promastigote cells in 45 minutes. Surprisingly, the immobilized DS 01 molecules displayed electroactivity, as revealed by electrochemical experiments, in which an oxidation peak at about 0.61 V was observed for a DS 01 monolayer deposited on top of a conductive electrode. Such electroactivity was used to investigate the sensing abilities of the nanostructured films toward Leishmania. We observed an increase in the oxidation current as a function of number of Leishmania cells in the electrolytic solution at concentrations down to 10(3) cells/mL. The latter is indicative that the use of AMPs immobilized in electroactive nanostructured films may be of interest for applications in the pharmaceutical industry and diagnosis. FROM THE CLINICAL EDITOR The recent interest in Antimicrobial peptides (AMPs) as active materials in bionanostructures is due to the properties shown by these biological molecules. Leishmanicidal activity of a particular AMP is demonstrated in this paper.
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Affiliation(s)
- Maysa F Zampa
- LAPETRO, Universidade Federal do Piauí, UFPI, Teresina, Brazil
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Leite JRSA, Brand GD, Silva LP, Kückelhaus SAS, Bento WRC, Araújo ALT, Martins GR, Lazzari AM, Bloch C. Dermaseptins from Phyllomedusa oreades and Phyllomedusa distincta: Secondary structure, antimicrobial activity, and mammalian cell toxicity. Comp Biochem Physiol A Mol Integr Physiol 2008; 151:336-343. [PMID: 17442605 DOI: 10.1016/j.cbpa.2007.03.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 03/13/2007] [Accepted: 03/13/2007] [Indexed: 10/23/2022]
Abstract
The present study reports the structural characteristics, the biological activities, and preliminary clinical investigations of three synthetic members of the dermaseptin family of antimicrobial peptides. The three peptides showed similar tendencies to form alpha-helical structures in non-polar media. The antimicrobial activity towards bacteria and fungi was determined in the micromolar concentration and the peptides did not influenced peritoneal cells viability. One of the peptides was intravenously administered in mice at concentrations similar to those of antibiotics employed in bacterial/fungal infections and it did not cause any detectable changes in cells and tissues.
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Affiliation(s)
- José Roberto S A Leite
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) - Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil; Campus Ministro Reis Velloso, Universidade Federal do Piauí - UFPI, Parnaíba, Piauí, 64202-020, PI, Brazil.
| | - Guilherme D Brand
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) - Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil; Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
| | - Luciano P Silva
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) - Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil
| | | | | | | | | | | | - Carlos Bloch
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) - Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil.
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Leite Jr JMA, Sampaio JMS, Silva-Leite RR, Toledo LF, Loebmann D, Leite JRSA. Amphibia, Anura, Hylidae, Scinax fuscomarginatus: distribution extension. cl 2008. [DOI: 10.15560/4.4.475] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Magalhães BS, Melo JAT, Leite JRSA, Silva LP, Prates MV, Vinecky F, Barbosa EA, Verly RM, Mehta A, Nicoli JR, Bemquerer MP, Andrade AC, Bloch C. Post-secretory events alter the peptide content of the skin secretion of Hypsiboas raniceps. Biochem Biophys Res Commun 2008; 377:1057-61. [PMID: 18976634 DOI: 10.1016/j.bbrc.2008.10.102] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Accepted: 10/16/2008] [Indexed: 01/02/2023]
Abstract
A novel family of antimicrobial peptides, named raniseptins, has been characterized from the skin secretion of the anuran Hypsiboas raniceps. Nine cDNA molecules have been successfully cloned, sequenced, and their respective polypeptides were characterized by mass spectrometry and Edman degradation. The encoded precursors share structural similarities with the dermaseptin prepropeptides from the Phyllomedusinae subfamily and the mature 28-29 residue long peptides undergo further proteolytic cleavage in the crude secretion yielding consistent fragments of 14-15 residues. The biological assays performed demonstrated that the Rsp-1 peptide has antimicrobial activity against different bacterial strains without significant lytic effect against human erythrocytes, whereas the peptide fragments generated by endoproteolysis show limited antibiotic potency. MALDI imaging mass spectrometry in situ studies have demonstrated that the mature raniseptin peptides are in fact secreted as intact molecules within a defined glandular domain of the dorsal skin, challenging the physiological role of the observed raniseptin fragments, identified only as part of the crude secretion. In this sense, stored and secreted antimicrobial peptides may confer distinct protective roles to the frog.
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Affiliation(s)
- Beatriz S Magalhães
- EMBRAPA Recursos Genéticos e Biotecnologia, Parque Estação Biológica, 70700-900 Brasília, DF, Brazil
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Dourado FS, Leite JRSA, Silva LP, Melo JAT, Bloch C, Schwartz EF. Antimicrobial peptide from the skin secretion of the frog Leptodactylus syphax. Toxicon 2007; 50:572-80. [PMID: 17628627 DOI: 10.1016/j.toxicon.2007.04.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2007] [Revised: 04/13/2007] [Accepted: 04/16/2007] [Indexed: 11/16/2022]
Abstract
Antimicrobial peptides are considered part of the innate immune system of the majority of living organisms. Most of these molecules are small, cationic and show amphiphilic nature. The skin secretions of Leptodactylus syphax were extracted by mild electrical stimulation and its semipreparative reverse-phase chromatography was resolved in more than 40 fractions. Among these fractions, an antimicrobial peptide was isolated and its amino acid sequence determined by de novo sequencing. Six other truncated forms were characterized in skin secretion. The longest one (25 amino acid residues), named syphaxin (SPX), is amidated at the C-terminal, and shares strong sequence similarity with antimicrobial peptides found in the skin secretion of leptodactylid frogs. Two of the truncated peptides (SPX(1-22) and SPX(1-16)) were tested against Escherichia coli and Staphylococcus aureus, showing low minimal inhibitory concentration (MIC) and no significant toxicity towards blood cells, including both leukocytes and erythrocytes, based on their direct incubation in whole blood at the highest MIC concentration (64 microg/mL).
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Affiliation(s)
- Flávio S Dourado
- Laboratório de Toxinologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, DF 70910-900, Brazil
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Silva LP, Leite JRSA, Brand GD, Regis WB, Tedesco AC, Azevedo RB, Freitas SM, Bloch C. Dermaseptins from Phyllomedusa oreades and Phyllomedusa distincta: liposomes fusion and/or lysis investigated by fluorescence and atomic force microscopy. Comp Biochem Physiol A Mol Integr Physiol 2007; 151:329-335. [PMID: 17409003 DOI: 10.1016/j.cbpa.2007.02.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 01/22/2007] [Accepted: 02/26/2007] [Indexed: 11/17/2022]
Abstract
Three dermaseptins, DS 01, DD K, and DD L, were compared with respect to their structural features and interactions with liposomes. Circular dichroic spectra at alcohols of different chain lengths revealed that DS 01 has the higher helicogenic potential in hydrophobic media. Binding of DS 01, DD K, and DD L to liposomes induced significant blue shifts of the emission spectra of the single tryptophan located at position 3 of all sequences indicating association of the peptides with bilayers. Kinetics evaluation of atomic force microscopy images evidenced the strong fusogenic activity of DS 01 whereas DD K and DD L showed increased lytic activities.
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Affiliation(s)
- Luciano P Silva
- Laboratório de Morfologia e Morfogênese, Departamento de Genética e Morfologia, Instituto de Biologia, Universidade de Brasília, Brasília, DF, 70910-900, Brazil; Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil.
| | - José Roberto S A Leite
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil; Campus Ministro Reis Velloso, Universidade Federal do Piauí-UFPI, Parnaíba, Piauí, 64202-020, PI, Brazil
| | - Guilherme D Brand
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil
| | - Willian B Regis
- Grupo de Biofísica Molecular-Centro de Biologia Molecular Estrutural, Laboratório Nacional de Luz Síncrotron (LNLS), Campinas, SP, Brazil
| | - Antonio C Tedesco
- FFCLRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, 14040-901, Brazil
| | - Ricardo B Azevedo
- Laboratório de Morfologia e Morfogênese, Departamento de Genética e Morfologia, Instituto de Biologia, Universidade de Brasília, Brasília, DF, 70910-900, Brazil
| | - Sonia M Freitas
- Laboratório de Biofísica, Departamento de Biologia Celular, Instituto de Biologia, Universidade de Brasília, 70910-900 Brazil
| | - Carlos Bloch
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasília, DF, 70770-900, Brazil.
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Brand GD, Krause FC, Silva LP, Leite JRSA, Melo JAT, Prates MV, Pesquero JB, Santos EL, Nakaie CR, Costa-Neto CM, Bloch C. Bradykinin-related peptides from Phyllomedusa hypochondrialis. Peptides 2006; 27:2137-46. [PMID: 16797783 DOI: 10.1016/j.peptides.2006.04.020] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Revised: 04/11/2006] [Accepted: 04/11/2006] [Indexed: 11/28/2022]
Abstract
Bradykinin related peptides (BRPs) present in the water-soluble secretion and freshly dissected skin fragments of Phyllomedusa hypochondrialis were investigated by mass spectrometry techniques. Eighteen BRPs, along with their post-translational modifications, were characterized in the secretion by de novo MS/MS sequencing and direct MALDI imaging experiments of the frog skin. These molecules revealed strong sequence similarities to the main plasma kinin of some mammals and reptiles. Such a diversity of molecules, within the same peptide family, belonging to a single amphibian species may be related to functional specializations of these peptides and a variety of corresponding receptors that might be present in a number of different predators. Also, a novel analog, [Val]1,[Thr]6-bradykinyl-Gln,Ser had its biological activity positively detected in cell culture expressing the human bradykinin B2 receptor and in guinea pig ileum preparations.
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Affiliation(s)
- G D Brand
- Laboratório de Espectrometria de Massa, EMBRAPA, Recursos Genéticos e Biotecnologia, Brasília, DF 70770-900, Brazil
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Brand GD, Leite JRSA, de Sá Mandel SM, Mesquita DA, Silva LP, Prates MV, Barbosa EA, Vinecky F, Martins GR, Galasso JH, Kuckelhaus SAS, Sampaio RNR, Furtado JR, Andrade AC, Bloch C. Novel dermaseptins from Phyllomedusa hypochondrialis (Amphibia). Biochem Biophys Res Commun 2006; 347:739-46. [PMID: 16844081 DOI: 10.1016/j.bbrc.2006.06.168] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2006] [Accepted: 06/27/2006] [Indexed: 11/22/2022]
Abstract
Six new antimicrobial peptides structurally related to the dermaseptin family have been isolated from the skin secretion of the amphibian Phyllomedusa hypochondrialis. The primary structures of these molecules named as DShypo 01, 02, 03, 04, 06, and 07 were determined by de novo MS/MS experiments, Edman degradation, and cDNA sequencing. The fifth peptide was found to be precisely the same DS 01 from Phyllomedusa oreades previously described by our group. The majority of the peptides purified from the crude skin secretion could be directly localized and mapped onto a freshly dissected dorsal skin fragment using mass spectrometry-imaging techniques. Comparisons between peptides and commercial drugs on their antibacterial and anti-Leishmania amazonensis efficiencies, associated with peptide lytic effects on mammalian blood cells and surface plasmon resonance interaction studies on immobilized DMPC vesicles, were also performed.
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Affiliation(s)
- Guilherme D Brand
- Laboratório de Espectrometria de Massa, EMBRAPA-Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil
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Calderon LA, Teles RCL, Leite JRSA, Franco OL, Grossi-de-Sá MF, Medrano FJ, Bloch C, Freitas SM. Purification of a 6.5 kDa protease inhibitor from Amazon Inga umbratica seeds effective against serine proteases of the boll weevil Anthonomus grandis. Protein Pept Lett 2005; 12:583-7. [PMID: 16101400 DOI: 10.2174/0929866054395888] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A 6.5 kDa serine protease inhibitor was purified by anion-exchange chromatography from the crude extract of the Inga umbratica seeds, containing inhibitor isoforms ranging from 6.3 to 6.7 kDa and protease inhibitors of approximately 19 kDa. The purified protein was characterized as a potent inhibitor against trypsin and chymotrypsin and it was named I. umbratica trypsin and chymotrypsin inhibitor (IUTCI). MALDI-TOF spectra of the IUTCI, in the presence of DTT, showed six disulfide bonds content, suggesting that this inhibitor belongs to Bowman-Birk family. The circular dichroism spectroscopy indicates that IUTCI is predominantly formed by unordered and beta-sheet secondary structure. It was also characterized, by fluorescence spectroscopy, as a stable protein at range of pH from 5.0 to 7.0. Moreover, this inhibitor at concentration of 75 microM presented a remarkable inhibitory activity (60%) against digestive serine proteases from boll weevil Anthonomus grandis, an important economical cotton pest.
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Affiliation(s)
- L A Calderon
- Universidade de Brasília, Departamento de Biologia Celular, Brasília, DF, Brazil.
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Leite JRSA, Silva LP, Rodrigues MIS, Prates MV, Brand GD, Lacava BM, Azevedo RB, Bocca AL, Albuquerque S, Bloch C. Phylloseptins: a novel class of anti-bacterial and anti-protozoan peptides from the Phyllomedusa genus. Peptides 2005; 26:565-73. [PMID: 15752569 DOI: 10.1016/j.peptides.2004.11.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2004] [Revised: 10/28/2004] [Accepted: 11/01/2004] [Indexed: 11/29/2022]
Abstract
Six novel peptides called phylloseptins (PS-1, -2, -3, -4, -5, and -6) showing anti-bacterial (PS-1) and anti-protozoan (PS-4 and -5) activities were isolated from the skin secretion of the Brazilian tree-frogs, Phyllomedusa hypochondrialis and Phyllomedusa oreades. Phylloseptins have a primary structure consisting of 19-21 amino acid residues (1.7-2.1 kDa). They have common structural features, such as a highly conserved N-terminal region and C-terminal amidation. Phylloseptin-1 (FLSLIPHAINAVSAIAKHN-NH2) demonstrated a strong effect against gram-positive and gram-negative bacteria (MICs ranging from 3 to 7.9 microM), without showing significant hemolytic activity (<0.6% at the MIC range) towards mammalian cells. Atomic force microscopy experiments indicated that the bacteriolytic properties of these peptides might be related to their disruptive action on the cell membrane, characterized by a number of bubble-like formations, preceding every cell lysis. PS-4 and PS-5 showed anti-protozoan activity with IC50 at about 5 microM for Trypanosoma cruzi.
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Affiliation(s)
- José Roberto S A Leite
- Laboratório de Espectrometria de Massa, EMBRAPA, Recursos Genéticos e Biotecnologia, Brasília 70770-900, Brazil
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Silva LP, Miyasaka CK, Martins EF, Leite JRSA, Lacava ZGM, Curi R, Azevedo RB. Effect of bullfrog (Rana catesbeiana) oil administered by gavage on the fatty acid composition and oxidative stress of mouse liver. Braz J Med Biol Res 2004; 37:1491-6. [PMID: 15448869 DOI: 10.1590/s0100-879x2004001000007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aim of the present study was to investigate the effects of daily intragastric administration of bullfrog oil (oleic, linoleic and palmitoleic acid-rich oil), corresponding to 0.4% of body weight for four weeks, on fatty acid composition and oxidative stress (lipid peroxidation and catalase activity) in mouse liver. The activities of aspartate aminotransferase (AST), alkaline phosphatase (ALP), alanine aminotransferase (ALT), and gamma-glutamyltransferase (GGT), biomarkers of tissue injury, were determined in liver homogenates and serum. The proportions of 18:2n-6, 20:4n-6, 20:5n-3, and 22:6n-3 (polyunsaturated fatty acids, from 37 to 60%) in the total fatty acid content were increased in the liver of the bullfrog oil-treated group (P < 0.05) compared to control. At the same time, a significant decrease in the relative abundance of 14:0, 16:0, and 18:0 (saturated fatty acids, from 49 to 25%) was observed. The hepatic content of thiobarbituric acid reactive substances (TBARS) was increased from 2.3 +/- 0.2 to 12.3 +/- 0.3 nmol TBA-MDA/mg protein and catalase activity was increased from 840 +/- 32 to 1110 +/- 45 micromol reduced H2O2 min-1 mg protein-1 in the treated group. Bullfrog oil administration increased AST and ALP activities in the liver (from 234.10 +/- 0.12 to 342.84 +/- 0.13 and 9.38 +/- 0.60 to 20.06 +/- 0.27 U/g, respectively) and in serum (from 95.41 +/- 6.13 to 120.32 +/- 3.15 and 234.75 +/- 11.5 to 254.41 +/- 2.73 U/l, respectively), suggesting that this treatment induced tissue damage. ALT activity was increased from 287.28 +/- 0.29 to 315.98 +/- 0.34 U/g in the liver but remained unchanged in serum, whereas the GGT activity was not affected by bullfrog oil treatment. Therefore, despite the interesting modulation of fatty acids by bullfrog oil, a possible therapeutic use requires care since some adverse effects were observed in liver.
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Affiliation(s)
- L P Silva
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, 70919-970 Brasilia, DF, Brazil
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Brand GD, Leite JRSA, Silva LP, Albuquerque S, Prates MV, Azevedo RB, Carregaro V, Silva JS, Sá VCL, Brandão RA, Bloch C. Dermaseptins from Phyllomedusa oreades and Phyllomedusa distincta. Anti-Trypanosoma cruzi activity without cytotoxicity to mammalian cells. J Biol Chem 2002; 277:49332-40. [PMID: 12379643 DOI: 10.1074/jbc.m209289200] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.0] [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: 11/06/2022] Open
Abstract
Amphibian skin secretions are known as a rich source of biologically active molecules, most of which are alkaloids, biogenic amines, and peptides. Dermaseptins are a class of antimicrobial peptides present in tree frogs of the Phyllomedusa genus. They are cationic molecules of 28-34 residues that permeabilize the membrane of Gram-positive and Gram-negative bacteria, yeasts, and filamentous fungi, showing little or no hemolytic activity. This work reports the isolation, molecular mass analysis, primary structure determination, biological activities, and potential therapeutic applications of an antimicrobial peptide found in the skin secretion of Phyllomedusa oreades, which is a newly described amphibian species endemic of the Brazilian savanna. DS 01 is a 29-residue-long peptide with a molecular mass of 2793.39 Da showing antibacterial properties against Gram-positive and Gram-negative bacteria in the range of 3-25 microm. Anti-protozoan activity was investigated using T. cruzi in its trypomatigote and epimastigote forms cultivated in both cell culture and blood media. Within 2 h after incubation with DS 01 at a final concentration of approximately 6 microm, no protozoan cells were detected. Two synthetic dermaseptins, described previously by our group and named dermadistinctins K and L (DD K and DD L), also had their anti-Trypanosoma cruzi activity investigated and demonstrated similar properties. Toxicity of DS 01 to mouse erythrocytes and white blood cells was evaluated by means of atomic force microscopy and flow cytometry. No morphological alterations were observed at a lytic concentration of DS 01, suggesting its therapeutic value especially as an anti-T. cruzi agent to prevent infections during blood transfusion.
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Affiliation(s)
- Guilherme D Brand
- Laboratório de Espectrometria de Massa, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) - Recursos Genéticos e Biotecnologia, Estação Parque Biológico, Final W5, Asa Norte, Brasilia, DF, 70770-900 Brazil
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