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Ferreira EDS, Cordeiro LV, Silva DDF, Diniz Neto H, Sousa APD, Souza HDDS, Athayde-Filho PFD, Guerra FQS, Barbosa-Filho JM, Oliveira Filho AAD, Lima EDO, Castro RDD. Evaluation of antifungal activity, mechanisms of action and toxicological profile of the synthetic amide 2-chloro- N-phenylacetamide. Drug Chem Toxicol 2024; 47:191-202. [PMID: 36803623 DOI: 10.1080/01480545.2022.2158849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/29/2022] [Accepted: 12/10/2022] [Indexed: 02/22/2023]
Abstract
Aspergillus niger causes infections such as otitis and pulmonary aspergillosis in immunocompromised individuals. Treatment involves voriconazole or amphotericin B, and due to the increase in fungal resistance, the search for new compounds with antifungal activity has intensified. In the development of new drugs, cytotoxicity and genotoxicity assays are important, as they allow predicting possible damage that a molecule can cause, and in silico studies predict the pharmacokinetic properties. The aim of this study was to verify the antifungal activity and the mechanism of action of the synthetic amide 2-chloro-N-phenylacetamide against Aspergillus niger strains and toxicity. 2-Chloro-N-phenylacetamide showed antifungal activity against different strains of Aspergillus niger with minimum inhibitory concentrations between 32 and 256 μg/mL and minimum fungicides between 64 and 1024 μg/mL. The minimum inhibitory concentration of 2-chloro-N-phenylacetamide also inhibited conidia germination. When associated with amphotericin B or voriconazole, 2-chloro-N-phenylacetamide had antagonistic effects. Interaction with ergosterol in the plasma membrane is the probable mechanism of action.2-Chloro-N-phenylacetamide has favorable physicochemical parameters, good oral bioavailability and absorption in the gastrointestinal tract, crosses the blood-brain barrier and inhibits CYP1A2. At concentrations of 50 to 500 µg/mL, it has little hemolytic effect and a protective effect for type A and O red blood cells, and in the cells of the oral mucosa it promotes little genotoxic change. It is concluded that 2-chloro-N-phenylacetamide has promising antifungal potential, favorable pharmacokinetic profile for oral administration and low cytotoxic and genotoxic potential, being a promising candidate for in vivo toxicity studies.
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Affiliation(s)
- Elba Dos Santos Ferreira
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Laísa Vilar Cordeiro
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Daniele de Figuerêdo Silva
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Hermes Diniz Neto
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Aleson Pereira de Sousa
- Postgraduate Program in Technological Development and Innovation of Medicines, Health Sciences Center, Federal University of Paraíba, University City Allotment, João Pessoa, Brazil
| | - Helivaldo Diógenes da Silva Souza
- Department of Chemistry, Center for Exact and Natural Sciences, Federal University of Paraíba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Petrônio Filgueiras de Athayde-Filho
- Department of Chemistry, Center for Exact and Natural Sciences, Federal University of Paraíba, Campus I, University City Allotment, João Pessoa, Brazil
| | | | - José Maria Barbosa-Filho
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Abrahão Alves de Oliveira Filho
- Biological Sciences Academic Unit at the Center for Rural Health and Technology (CSTR), Federal University of Campina Grande (UFCG), Bairro Jatobá, Patos, Brazil
| | - Edeltrudes de Oliveira Lima
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
| | - Ricardo Dias de Castro
- Postgraduate Program in Natural and Bioactive Synthetic Products, Health Sciences Center, Federal University of Paraíba, Center for Health Sciences, Federal University of Paraiba, Campus I, University City Allotment, João Pessoa, Brazil
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Mohammadi M, Abbaszadeh S, Nosrati-Siahmazgi V, Akbari M, Rezaei S, Musaie K, Eskandari MR, Santos HA, Poursina N, Shahbazi MA. Diatom-guided bone healing via a hybrid natural scaffold. Heliyon 2024; 10:e25878. [PMID: 38384564 PMCID: PMC10878915 DOI: 10.1016/j.heliyon.2024.e25878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024] Open
Abstract
Bone tissue engineering (BTE) involves the design of three-dimensional (3D) scaffolds that aim to address current challenges of bone defect healing, such as limited donor availability, disease transmission risks, and the necessity for multiple invasive surgeries. Scaffolds can mimic natural bone structure to accelerate the mechanisms involved in the healing process. Herein, a crosslinked combination of biopolymers, including gelatin (GEL), chitosan (CS), and hyaluronic acid (HA), loaded with diatom (Di) and β-sitosterol (BS), is used to produce GCH-Di-S scaffold by freeze-drying method. The GCH scaffold possesses a uniform structure, is biodegradable and biocompatible, and exhibits high porosity and interconnected pores, all required for effective bone repair. The incorporation of Di within the scaffold contributes to the adjustment of porosity and degradation, as well as effectively enhancing the mechanical property and biomineralization. In vivo studies have confirmed the safety of the scaffold and its potential to stimulate the creation of new bone tissue. This is achieved by providing an osteoconductive platform for cell attachment, prompting calcification, and augmenting the proliferation of osteoblasts, which further contributes to angiogenesis and anti-inflammatory effects of BS.
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Affiliation(s)
- Mina Mohammadi
- Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Science, 45139-56184 Zanjan, Iran
| | - Samin Abbaszadeh
- Department of Pharmacology, School of Medicine, Zanjan University of Medical Science, 45139-56111 Zanjan, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Urmia University of Medical Sciences, Urmia, Iran
| | - Vahideh Nosrati-Siahmazgi
- Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Science, 45139-56184 Zanjan, Iran
| | - Mahsa Akbari
- Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Science, 45139-56184 Zanjan, Iran
| | - Saman Rezaei
- Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Science, 45139-56184 Zanjan, Iran
| | - Kiyan Musaie
- Department of Biomaterials and Biomedical Technology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, the Netherlands
| | - Mohammad Reza Eskandari
- Department of Pharmacology and Toxicology, School of Pharmacy, Zanjan University of Medical Science, 45139-56184, Zanjan, Iran
| | - Hélder A. Santos
- Department of Biomaterials and Biomedical Technology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, the Netherlands
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Narges Poursina
- Department of Pharmaceutical Biomaterials, School of Pharmacy, Zanjan University of Medical Science, 45139-56184 Zanjan, Iran
- Department of Pharmaceutics, School of Pharmacy, Zanjan University of Medical Science, 45139-56184 Zanjan, Iran
| | - Mohammad-Ali Shahbazi
- Department of Biomaterials and Biomedical Technology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, the Netherlands
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Inhibition of Klebsiella pneumoniae carbapenemases by mycocins produced by Wickerhamomyces anomalus. Arch Microbiol 2022; 204:702. [DOI: 10.1007/s00203-022-03311-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 10/05/2022] [Accepted: 10/28/2022] [Indexed: 11/13/2022]
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Susceptibility of Candida albicans Strains Isolated from Vaginal Secretion in Front of the Mycocins of Wickerhamomyces anomalus. Probiotics Antimicrob Proteins 2022; 14:595-601. [PMID: 35451745 DOI: 10.1007/s12602-022-09940-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2022] [Indexed: 10/18/2022]
Abstract
Mycocins are substances that have the potential to affect other sensitive yeasts or microorganisms. Wickerhamomyces anomalus is a yeast that produces mycocins that have great biotechnological potential, being highly competitive in many habitats, as it is adaptable to a wide range of environmental conditions. Thus, they are targets for studies in different areas, including the environment, industry, and medical sciences. Yeasts of the genus Candida are of great importance due to the high frequency with which they colonize and infect the human host. Yeast infections are often difficult to treat due to the acquisition of resistance against antifungals, leading to studies focusing in new treatment alternatives. This work aims to verify the inhibition of Candida albicans isolated from vaginal secretion by mycocins produced by Wickerhamomyces anomalus. Tests were carried out in solid medium and microdilution tests, where mycocins proved to be efficient in inhibiting the growth of C. albicans, hemolysis, and irritation in an organotypic model, which showed that the mycocins produced by W. anomalus are safe and non-irritating. Thus, the results of this work can provide scientific evidence for the application of mycocins in the production of new antifungal alternatives.
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Sousa AP, Oliveira MS, Fernandes DA, Ferreira MDL, Cordeiro LV, Souza MFV, Fernandes LMD, Souza HDS, Oliveira Filho AA, Pessoa HLF, Sá RCS. In silico, in vitro, and ex vivo studies of the toxicological and pharmacological properties of the flavonoid 5,7-dihydroxy-3,8,4'-trimethoxy. Braz J Med Biol Res 2021; 54:e11203. [PMID: 34406208 PMCID: PMC8373196 DOI: 10.1590/1414-431x2021e11203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 06/10/2021] [Indexed: 11/21/2022] Open
Abstract
Phytochemical studies of the species Pavonia glazioviana were performed. Quercetin, kaempferol, acacetin, and trimethoxylated flavonoid compounds (which present biological activity) were isolated. We aimed to evaluate the in silico, in vitro, and ex vivo toxicity of flavonoid 5,7-dihydroxy-3,8,4'-trimethoxy (Pg-1) obtained from P. glazioviana through chemical structure analyses, toxicity assessment, and predictive bioactive properties, using human samples in in vitro tests. In silico analysis suggested that Pg-1 presents a good absorption index for penetrating biological membranes (for oral bioavailability), while also suggesting potential antimutagenic, anticarcinogenic, antioxidant, antineoplastic, anti-inflammatory, anti-hemorrhagic, and apoptosis agonist bioactivities. Assessment of hemolytic and genotoxic effects revealed low hemolysis rates in red blood cells with no cellular toxicity in oral mucosa cells. The reduced cytotoxic activity suggested the safety of the concentrations used (500-1000 µg/mL), and demonstrated the varied interactions of Pg-1 with the analyzed cells. The data obtained in the present study suggested potential therapeutic application, and the non-toxic profile indicated viability for future studies.
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Affiliation(s)
- A P Sousa
- Departamento de Fisiologia e Patologia, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - M S Oliveira
- Departamento de Ciência Farmacêutica, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - D A Fernandes
- Departamento de Ciência Farmacêutica, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - M D L Ferreira
- Departamento de Ciência Farmacêutica, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - L V Cordeiro
- Departamento de Ciência Farmacêutica, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - M F V Souza
- Departamento de Ciência Farmacêutica, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - L M D Fernandes
- Departamento de Ciência Farmacêutica, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - H D S Souza
- Departamento de Química, Centro de Ciências Exatas e Naturais, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - A A Oliveira Filho
- Centro de Ciências Biológicas e da Saúde, Universidade Federal de Campina Grande, Patos, PB, Brasil
| | - H L F Pessoa
- Departamento de Fisiologia e Patologia, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - R C S Sá
- Departamento de Fisiologia e Patologia, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, PB, Brasil
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Sousa AP, Fernandes DA, Ferreira MDL, Cordeiro LV, Souza MFV, Pessoa HLF, Oliveira Filho AA, Sá RCS. Analysis of the toxicological and pharmacokinetic profile of Kaempferol-3-O-β-D-(6"-E-p-coumaryl) glucopyranoside - Tiliroside: in silico, in vitro and ex vivo assay. BRAZ J BIOL 2021; 83:e244127. [PMID: 34161458 DOI: 10.1590/1519-6984.244127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/30/2020] [Indexed: 11/22/2022] Open
Abstract
Tiliroside is a glycosidic flavonoid present in many plants species including Helicteres velutina K. Schum (Malvaceae sensu lato), commonly known in Brazil as "pitó". This molecule has been shown to have many biological activities, however no study has been carried out to investigate the toxicity of this substance. The present work aimed to evaluate the possible cellular toxicity in silico, in vitro and ex-vivo of the kaempferol-3-O-β-D-(6"-E-p-coumaroyl) glucopyranoside (tiliroside), through chemical structure analysis, toxicity assessment and predictive bioactive properties, using human samples for in vitro and ex-vivo tests. The in silico analysis suggests that tiliroside exhibited great absorption index when penetrating biological membranes. In addition, it also displayed considerable potential for cellular protection against free radicals, and anticarcinogenic, antioxidant, antineoplastic, anti-inflammatory, anti-hemorrhagic and antithrombotic activities. The assessment of the hemolytic and genotoxic effects of tiliroside showed low hemolysis rates in red blood cells and absence of cellular toxicity in the oral mucosa cells. The data obtained indicate that this molecule could be a promising therapeutic approach as a possible new drug with biotechnological potential.
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Affiliation(s)
- A P Sousa
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Fisiologia e Patologia, Pós-graduação em Desenvolvimento e Inovação Tecnológica de Medicamentos, João Pessoa, PB, Brasil
| | - D A Fernandes
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Ciências Farmacêuticas, Pós-graduação em Produtos Naturais e Sintéticos Bioativos, João Pessoa, PB, Brasil
| | - M D L Ferreira
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Ciências Farmacêuticas, Pós-graduação em Produtos Naturais e Sintéticos Bioativos, João Pessoa, PB, Brasil
| | - L V Cordeiro
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Ciências Farmacêuticas, Pós-graduação em Produtos Naturais e Sintéticos Bioativos, João Pessoa, PB, Brasil
| | - M F V Souza
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Fisiologia e Patologia, Pós-graduação em Desenvolvimento e Inovação Tecnológica de Medicamentos, João Pessoa, PB, Brasil.,Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Ciências Farmacêuticas, Pós-graduação em Produtos Naturais e Sintéticos Bioativos, João Pessoa, PB, Brasil
| | - H L F Pessoa
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Fisiologia e Patologia, Pós-graduação em Desenvolvimento e Inovação Tecnológica de Medicamentos, João Pessoa, PB, Brasil
| | - A A Oliveira Filho
- Universidade Federal de Campina Grande - UFCG, Centro de Ciências Biológicas e da Saúde, Patos, PB, Brasil
| | - R C S Sá
- Universidade Federal da Paraíba - UFPB, Centro de Ciências da Saúde, Departamento de Fisiologia e Patologia, Pós-graduação em Desenvolvimento e Inovação Tecnológica de Medicamentos, João Pessoa, PB, Brasil
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Antibacterial and Antifungal Activities and Toxicity of the Essential Oil from Callistemon viminalis Complexed with β-Cyclodextrin. Curr Microbiol 2021; 78:2251-2258. [PMID: 33837817 DOI: 10.1007/s00284-021-02480-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 03/26/2021] [Indexed: 10/21/2022]
Abstract
The essential oil from Callistemon viminalis (EOC) is rich in monoterpenes, with a variety of biological properties: antibacterial, antifungal, insecticide, and antioxidant. Inclusion complexes (ICs) with cyclodextrins (CDs) is an alternative to prevent toxicity, improve the activity, and reduce the concentration to be used. Thus, the objective of this work was to prepare an IC (EOC/β-CD) and evaluate the antibacterial, antifungal and phospholipase activities, as well as the toxicity. Antimicrobial activity used the agar diffusion test and antifungal activity the disc diffusion test. Toxicity tests were carried out using Lactuca sativa L. The inhibition of phospholipase activity using the venom of Bothrops atrox as an inducer was performed. Antibacterial and antifungal tests demonstrated a decrease in the minimum inhibitory concentration (MIC) of the IC. It was most significantly observed for the bacterium Listeria monocytogenes, for which there was a decrease in the MIC from 250 µg mL-1 to 62.5 µg mL-1 after complexation, and for the fungus Aspergillus flavus, with a decrease in MIC from 125 µg mL-1 to 62.5 µg mL-1 after complexation. Toxicity tests with Lactuca sativa showed a decrease in toxicity after complexation in all parameters analyzed, with no statistical difference from the negative control. Inhibition of phospholipase activity induced by Bothrops atrox venom was more expressive in the highest proportion studied (1:10 m:m), exerting 23% inhibition. The assays demonstrated that the complexation between the EOC and β-CD is a promising alternative for use in different branches, especially in food industry, to fully exploit its application potential.
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Bomfim de Sá C, Brito Lira A, Filho AADO, de Oliveira KM, Rolim da Paz A, Castro de Morais M, de Sousa DP, Tafaela Dias G, Rodrigues Melo C, Pessôa HDLF, Maria Bezerra Luna Lima C, de Fátima Formiga Melo Diniz M. In silico, in vitro, and in vivo investigation of antioxidant potential and toxicity of ethyl ferulate. Drug Chem Toxicol 2021; 45:1769-1779. [PMID: 33632037 DOI: 10.1080/01480545.2021.1878207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
By submitting this manuscript, each author certifies that they have made a direct and substantial contribution to the work reported in the manuscript. In this manuscript the conception, design, investigation, acquisition of data and analysis, interpretation of data and writing of the article were conducted by author Camila Bomfim de Sá under the guidance of professors Margareth de Fátima Formiga Melo Diniz, Hilzeth de Luna Freire Pessôa and Caliandra Maria Bezerra Luna Lima, who also approved the final version of the manuscript. Professor Damião Pergentino de Sousa and his student Mayara Castro de Morais performed the production, synthesis and chemical characterization of ethyl ferulate (EF). Professor Abrahão Alves de Oliveira Filho assessed the in silico tests. PhD student Andressa Brito Lira participated in the critical review of the text for important intellectual content and assisted in the in vitro antioxidant activity and cytotoxicity tests. Kardilandia Mendes de Oliveira participated in acute oral toxicity tests evaluating the biochemical parameters. Students, Tafaela Dias and Cinthia Rodrigues Melo also assisted in the acute oral toxicity testing and preparing of slides for histopathological analysis. Pathologist Alexandre Rolim da Paz analyzed the histopathology results. EF, a phenolic compound of the large class of phenylpropanoids, is derived from ferulic acid and is produced both naturally and synthetically. Its principal pharmacological activities are: anti-inflammatory and antioxidant activity. This study aimed to investigate the in silico, in vitro and in vivo toxicity and antioxidant activity of EF. The in silico prediction showed more than 20 biological activities as well as good absorption at the biological membranes and no theoretical toxicity. However, EF presented high environmental toxicity. EF presented low hemolytic potential and exerted protective activity for the erythrocyte membrane for only blood type O. EF presented antioxidant activity against H2O2 at all concentrations and all blood types, but no effect against phenylhydrazine, being unable to prevent its oxidative effects. In the acute nonclinical toxicological trial, the treated animals presented behavioral changes (e.g., sedation). Feed intake was higher for the 2000 mg/kg group, but with no significant difference in weight change. The biochemical parameters presented no differences between treated and control animals, and the organs remained intact with no change. Thus, EF presents a low toxic profile and this study provides important information about the toxicity of this compound, suggesting future safe use.
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Affiliation(s)
- Camila Bomfim de Sá
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil
| | - Andressa Brito Lira
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil
| | | | - Kardilandia Mendes de Oliveira
- Program of Postgraduate Studies in Development and Technological Innovation in Medicine, Federal University of Paraíba, João Pessoa, Brazil
| | | | - Mayara Castro de Morais
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil
| | - Damião Pergentino de Sousa
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil.,Program of Postgraduate Studies in Development and Technological Innovation in Medicine, Federal University of Paraíba, João Pessoa, Brazil.,Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
| | - Gabriela Tafaela Dias
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil
| | - Cinthia Rodrigues Melo
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil
| | - Hilzeth de Luna Freire Pessôa
- Program of Postgraduate Studies in Development and Technological Innovation in Medicine, Federal University of Paraíba, João Pessoa, Brazil.,Department of Molecular Biology, Federal University of Paraíba, João Pessoa, Brazil
| | | | - Margareth de Fátima Formiga Melo Diniz
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, Brazil.,Program of Postgraduate Studies in Development and Technological Innovation in Medicine, Federal University of Paraíba, João Pessoa, Brazil.,Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
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Souza-Melo WOD, Figueiredo-Júnior EC, Freire JCP, Costa BP, Lira AB, Freires IA, Cavalcanti YW, Lopes WS, Tavares JF, Pessôa HDLF, Pereira JV. Phytochemistry, antifungal and antioxidant activity, and cytotoxicity of byrsonima gardneriana (A. Juss) extract. Arch Oral Biol 2021; 123:104994. [PMID: 33472099 DOI: 10.1016/j.archoralbio.2020.104994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 11/03/2020] [Accepted: 11/15/2020] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To determine the phytochemical composition of Byrsonima gardneriana (A. Juss) leaf extract (BGE) and its antifungal activity against Candida spp., antioxidant potential and in vitro cytotoxicity. MATERIAL AND METHODS BGE was obtained and submitted to Gas Chromatography Coupled to Mass Spectrometry for phytochemical analysis. The ethanolic extract was tested for its antifungal activity against C. albicans and non-albicans reference strains and clinical isolates in addition to inhibition of C. albicans growth kinetics. It was also tested for antioxidant potential in the presence of phenylhydrazine and reactive oxygen species (ROS). And cytoxicity in human erythrocytes. The data were analyzed by one-way Analysis of Variance (ANOVA) followed by Tukey's or Dunnett's post-hoc test, with α = 0.05. RESULTS Pyroglutamic acid (90.77 %), eucalyptol (89.61 %) and octanoic acid (76.22 %) were the major compounds detected in BGE, P (%) is the percent probability of compound identification, according to the mass spectra library. The extract showed fungistatic activity, with MIC of 125 μg/mL against most tested strains. While BGE showed low hemolytic activity on all blood types tested herein, it could not prevent osmotic stress in human erythrocytes. The extract did not have oxidizing effects in the presence of phenylhydrazine, but it showed antioxidant potential against ROS when tested at 31 μg/mL and 62 μg/mL. CONCLUSION B. gardneriana extract showed antifungal activity against Candida spp., demonstrated low hemolytic potential, no oxidant activity in human erythrocytes and antioxidant activity against ROS. This study opens avenues for the study of BGE as a promising biocompatible antifungal agent.
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Affiliation(s)
| | | | | | - Bruna Palmeira Costa
- Department of Dentistry, State University of Paraíba, Campina Grande, PB, Brazil.
| | - Andressa Brito Lira
- Program of Postgraduate Studies in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa, PB, Brazil.
| | - Irlan Almeida Freires
- Departament of Physiological Sciences, Piracicaba Dental School, University of Campinas, Campinas, SP, Brazil.
| | - Yuri Wanderley Cavalcanti
- Department of Clinical and Social Dentistry, Health Sciences Center, Federal University of Paraíba, João Pessoa, PB, Brazil.
| | - Wilton Silva Lopes
- Department of Sanitary and Environmental Engineering, Science and Technology Center, State University of Paraíba, Campina Grande, PB, Brazil.
| | - Josean Fechine Tavares
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, PB, Brazil.
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da Silva GC, de Oliveira AM, Machado JCB, Ferreira MRA, de Medeiros PL, Soares LAL, de Souza IA, Paiva PMG, Napoleão TH. Toxicity assessment of saline extract and lectin-rich fraction from Microgramma vacciniifolia rhizome. Toxicon 2020; 187:65-74. [PMID: 32890585 DOI: 10.1016/j.toxicon.2020.08.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/21/2020] [Accepted: 08/30/2020] [Indexed: 01/29/2023]
Abstract
Microgramma vacciniifolia is broadly used in folk medicine but safety information is unavailable. Therefore, we evaluated the toxicity of a saline extract and a lectin-rich fraction of M. vacciniifolia rhizome. The extract showed hemolytic activity on mice erythrocytes at 1000 μg/mL, whereas the fraction promoted hemolysis (8.57-26.15%) at all tested concentrations (10-1000 μg/mL). Acute toxicity test in mice indicated an LD50 of >5000 mg/kg. Hematological alterations and increased serum alkaline phosphatase level were observed in the treated animals. Transaminases and urea levels increased in the groups treated with the extract or fraction at 5000 mg/kg. Leukocyte infiltration was observed in the liver of extract-treated animals and in the liver and lungs of mice treated with the fraction. The kidneys of animals treated with the fraction at 5000 mg/kg presented hydropic degeneration. The extract and fraction did not induce oxidative stress in the liver and did not show genotoxicity, as examined by micronucleus and comet assays. In conclusion, the preparations were not lethal to mice but caused some signs of toxicity, mainly the fraction. The results indicated the need to evaluate the toxicity of M. vacciniifolia rhizome in other models and in chronic assays.
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Affiliation(s)
- Gabriela Cavalcante da Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Alisson Macário de Oliveira
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil; Departamento de Farmácia, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Janaina Carla Barbosa Machado
- Departamento de Farmácia, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | | | - Paloma Lys de Medeiros
- Departamento de Histologia e Embriologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Luiz Alberto Lira Soares
- Departamento de Farmácia, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Ivone Antônia de Souza
- Departamento de Antibióticos, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Patrícia Maria Guedes Paiva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Thiago Henrique Napoleão
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
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Cordeiro L, Diniz-Neto H, Figueiredo P, Souza H, Sousa A, Andrade-Júnior F, Melo T, Ferreira E, Oliveira R, Athayde-Filho P, Barbosa-Filho J, Oliveira-Filho A, Lima E. Potential of 2-Chloro- N-(4-fluoro-3-nitrophenyl)acetamide Against Klebsiella pneumoniae and In Vitro Toxicity Analysis. Molecules 2020; 25:molecules25173959. [PMID: 32877986 PMCID: PMC7504751 DOI: 10.3390/molecules25173959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 07/18/2020] [Accepted: 07/21/2020] [Indexed: 11/16/2022] Open
Abstract
Klebsiella pneumoniae causes a wide range of community and nosocomial infections. The high capacity of this pathogen to acquire resistance drugs makes it necessary to develop therapeutic alternatives, discovering new antibacterial molecules. Acetamides are molecules that have several biological activities. However, there are no reports on the activity of 2-chloro-N-(4-fluoro-3-nitrophenyl)acetamide. Based on this, this study aimed to investigate the in vitro antibacterial activity of this molecule on K. pneumoniae, evaluating whether the presence of the chloro atom improves this effect. Then, analyzing its antibacterial action more thoroughly, as well as its cytotoxic and pharmacokinetic profile, in order to contribute to future studies for the viability of a new antibacterial drug. It was shown that the substance has good potential against K. pneumoniae and the chloro atom is responsible for improving this activity, stabilizing the molecule in the target enzyme at the site. The substance possibly acts on penicillin-binding protein, promoting cell lysis. The analysis of cytotoxicity and mutagenicity shows favorable results for future in vivo toxicological tests to be carried out, with the aim of investigating the potential of this molecule. In addition, the substance showed an excellent pharmacokinetic profile, indicating good parameters for oral use.
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Affiliation(s)
- Laísa Cordeiro
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
- Correspondence: ; Tel.: +55-83-3216-7347
| | - Hermes Diniz-Neto
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Pedro Figueiredo
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Helivaldo Souza
- Chemistry Department, Exact and Natural Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Brazil; (H.S.); (R.O.); (P.A.-F.)
| | - Aleson Sousa
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Francisco Andrade-Júnior
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Thamara Melo
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Elba Ferreira
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Rafael Oliveira
- Chemistry Department, Exact and Natural Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Brazil; (H.S.); (R.O.); (P.A.-F.)
| | - Petrônio Athayde-Filho
- Chemistry Department, Exact and Natural Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Brazil; (H.S.); (R.O.); (P.A.-F.)
| | - José Barbosa-Filho
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
| | - Abrahão Oliveira-Filho
- Rural Health and Technology Center, Federal University of Campina Grande, 58708-110 Patos, Brazil;
| | - Edeltrudes Lima
- Department of Pharmaceutical Science, Health Sciences Center, Federal University of Paraíba, 58033-455 João Pessoa, Paraíba, Brazil; (H.D.-N.); (P.F.); (A.S.); (F.A.-J.); (T.M.); (E.F.); (J.B.-F.); (E.L.)
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12
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de Souza ILL, de Vasconcelos MA, da Silva ADS, Silva PCB, Veloso CAG, de Araújo DIAF, Costa VCDO, Pessôa HLF, Tavares JF, da Silva MS, da Silva BA, Cavalcante FDA. Toxicological and Pharmacological Activities of Leptohyptis macrostachys (Benth.) Harley and J.F.B.Pastore (Lamiaceae) on Intestinal Smooth Muscle. Front Pharmacol 2020; 11:1042. [PMID: 32754035 PMCID: PMC7366869 DOI: 10.3389/fphar.2020.01042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 06/26/2020] [Indexed: 11/13/2022] Open
Abstract
Leptohyptis macrostachys, previously known as Hyptis macrostachys Benth., is used in folk medicine to relieve the symptoms of asthma, cough, and bronchitis. Recently, we showed that the ethanol extract obtained from Leptohyptis macrostachys has selective spasmolytic activity on guinea pig ileum. Therefore, the aim of this study was to characterize the spasmolytic mechanism of this extract, investigated whether it presents toxicological and antidiarrheal activities. Therefore, the crude ethanolic extract of Leptohyptis macrostachys was analyzed by high-performance liquid chromatographic-diode array detection (HPLC-DAD). The spasmolytic effect was evaluated on guinea pig ileum, toxicological activity using rats and antidiarrheal activity using male and female mice. In HPLC-DAD analysis, Rosmarinic acid (5.44%) was the most abundant phenolic compound, being considered as a chemical marker. The spasmolytic potency of the extract on histamine-induced contraction was reduced in the presence of 1 mM TEA+, a selective big-conductance K+ channels blocker (BKCa). The extract produces a dose-dependent antidiarrheal activity, inhibiting equipotently defecation frequency and liquid stool formation. In addition, the extract has inhibited in a dose-dependent manner both castor oil-induced intestinal transit and intestinal fluid content. Thus, the spasmolytic activity of the extract involves positive modulation of BKCa and its antidiarrheal activity is related to inhibition of intestinal motility and secretion.
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Affiliation(s)
- Iara Leão Luna de Souza
- Departamento de Ciências Biológicas e Saúde, Universidade Estadual de Roraima, Boa Vista, Brazil
| | | | - Anne Dayse Soares da Silva
- Programa de Pós-graduação em Química e Biotecnologia, Instituto de Química, Universidade Federal de Alagoas, Maceió, Brazil
| | | | | | | | | | - Hilzeth Luna Freire Pessôa
- Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Josean Fechine Tavares
- Instituto de Pesquisa em Fármacos e Medicamentos, Universidade Federal da Paraíba, João Pessoa, Brazil
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Marcelo Sobral da Silva
- Instituto de Pesquisa em Fármacos e Medicamentos, Universidade Federal da Paraíba, João Pessoa, Brazil
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Bagnólia Araújo da Silva
- Instituto de Pesquisa em Fármacos e Medicamentos, Universidade Federal da Paraíba, João Pessoa, Brazil
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, Brazil
| | - Fabiana de Andrade Cavalcante
- Instituto de Pesquisa em Fármacos e Medicamentos, Universidade Federal da Paraíba, João Pessoa, Brazil
- Departamento de Fisiologia e Patologia, Centro de Ciências da Saúde, Universidade Federal da Paraíba, João Pessoa, Brazil
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de Castro E Silva J, Lopes do Couto L, de Oliveira Amaral H, Maria Medeiros Gomes F, Avohay Alves Campos G, Paulino Silva L, Renata Mortari M. Neuropolybin: A new antiseizure peptide obtained from wasp venom. Biochem Pharmacol 2020; 181:114119. [PMID: 32589997 DOI: 10.1016/j.bcp.2020.114119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 12/18/2022]
Abstract
Epilepsy accounts for one of the most serious neurological disorders, and its treatment remains a challenge, due to high cost and harmful side effects. Bioactive molecules extracted from arthropod venoms are considered a promising therapy since these compounds are known for their highly selective and potent profiles. The purpose of this study was to identify and characterize the potential antiseizure effect of the peptide Ppnp7, extracted from the venom of the social wasp Polybia paulista, and also the effect of the bioinspired peptide, named Neuropolybin, in the same parameters. Additionally, we also evaluated the electroencephalographic (EEG) profile in the PTZ-induced acute seizures in animals treated with Neuropolybin, and potential adverse effects of both peptides in general spontaneous activity (Open Field analysis). Interestingly, Ppnp7 and Neuropolybin showed a noteworthy antiseizure effect in rats and mice, respectively. Curves of protection against the maximum seizure were obtained for both peptides, and EEG records demonstrated that Neuropolybin protected 80% of animals from tonic-clonic seizures when applied with a dose of 3 nmol (an approximate Ppnp7 ED50 found in rats). Neuropolybin and Ppnp7 did not cause changes in the general spontaneous activity of the animals in any of the doses evaluated. Therefore, this study demonstrated how compounds isolated from wasps' venom may be essential resources in the search for new drugs, and can also be considered valuable therapeutic and biotechnological tools for the study and future treatment of epileptic disorders.
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Affiliation(s)
- Juliana de Castro E Silva
- Neuropharmacology Laboratory, Institute of Biological Sciences, Department of Physiological Sciences, University of Brasília, Distrito Federal, DF, Brazil
| | - Lucianna Lopes do Couto
- Neuropharmacology Laboratory, Institute of Biological Sciences, Department of Physiological Sciences, University of Brasília, Distrito Federal, DF, Brazil
| | - Henrique de Oliveira Amaral
- Neuropharmacology Laboratory, Institute of Biological Sciences, Department of Physiological Sciences, University of Brasília, Distrito Federal, DF, Brazil
| | - Flávia Maria Medeiros Gomes
- Neuropharmacology Laboratory, Institute of Biological Sciences, Department of Physiological Sciences, University of Brasília, Distrito Federal, DF, Brazil
| | - Gabriel Avohay Alves Campos
- Neuropharmacology Laboratory, Institute of Biological Sciences, Department of Physiological Sciences, University of Brasília, Distrito Federal, DF, Brazil
| | - Luciano Paulino Silva
- Mass Spectrometry Laboratory, EMBRAPA Genetic Resources and Biotechnology, Distrito Federal, DF, Brazil
| | - Márcia Renata Mortari
- Neuropharmacology Laboratory, Institute of Biological Sciences, Department of Physiological Sciences, University of Brasília, Distrito Federal, DF, Brazil.
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14
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Huang B, Liang Y, Pan H, Xie L, Jiang T, Jiang T. Hemolytic and cytotoxic activity from cultures of Aureococcus anophagefferens-a causative species of brown tides in the north-western Bohai Sea, China. CHEMOSPHERE 2020; 247:125819. [PMID: 31927184 DOI: 10.1016/j.chemosphere.2020.125819] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 12/20/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
Brown tides were first observed in 2009 in the north-western Bohai Sea (Qinhuangdao sea area), China, and blooms have occurred at different scales in late spring every year since then. Although the detrimental effects on marine organisms of the causative phytoplankton species Aureococcus anophagefferens have been extensively studied, the mechanism remains poorly understood. We used erythrocytes and adrenal gland chromaffin tumor cells (PC12) to explore the hemolytic activity and cytotoxicity, respectively, of chloroform and methanol extracts of cultured A. anophagefferens isolated from the north-western Bohai Sea area. The methanol extracts showed no hemolytic or cytotoxic activity. Chloroform extracts had a potent hemolytic effect on rabbit erythrocytes; thin layer chromatography (TLC) indicated that the hemolysin was a kind of glycolipid compound. Erythrocyte lysis assay showed that erythrocytes of sea bream were sensitive to the hemolysin, whereas those of human and chicken erythrocytes were insensitive. The hemolytic effects were elevated as temperatures rose from 4 °C to 37 °C. Hemolytic blocking experiments showed that sphingomyelin and d-xylose can inhibit hemolysis significantly, while osmotic protectants with different hydrated molecular diameters had no inhibition, and the hemolysins had no obvious phospholipase activity. The chloroform extracts of A. anophagefferens had significant inhibitory effects on the viability of PC12 cells, and can induce efflux of lactic dehydrogenase (LDH) of PC12 cells and lead to their necrosis.
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Affiliation(s)
- Baiqiang Huang
- Research Center of Harmful Algae & Marine Biology, Jinan University, Guangzhou, 510632, China
| | - Yanlan Liang
- Research Center of Harmful Algae & Marine Biology, Jinan University, Guangzhou, 510632, China
| | - Huizhu Pan
- Research Center of Harmful Algae & Marine Biology, Jinan University, Guangzhou, 510632, China
| | - Lei Xie
- Research Center of Harmful Algae & Marine Biology, Jinan University, Guangzhou, 510632, China
| | - Tao Jiang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao, 266071, China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266200, China.
| | - Tianjiu Jiang
- Research Center of Harmful Algae & Marine Biology, Jinan University, Guangzhou, 510632, China.
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15
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Konno K, Kazuma K, Rangel M, Stolarz-de-Oliveira J, Fontana R, Kawano M, Fuchino H, Hide I, Yasuhara T, Nakata Y. New Mastoparan Peptides in the Venom of the Solitary Eumenine Wasp Eumenes micado. Toxins (Basel) 2019; 11:toxins11030155. [PMID: 30857348 PMCID: PMC6468405 DOI: 10.3390/toxins11030155] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 02/28/2019] [Accepted: 03/05/2019] [Indexed: 01/03/2023] Open
Abstract
Comprehensive LC-MS and MS/MS analysis of the crude venom extract from the solitary eumenine wasp Eumenes micado revealed the component profile of this venom mostly consisted of small peptides. The major peptide components, eumenine mastoparan-EM1 (EMP-EM1: LKLMGIVKKVLGAL-NH2) and eumenine mastoparan-EM2 (EMP-EM2: LKLLGIVKKVLGAI-NH2), were purified and characterized by the conventional method. The sequences of these new peptides are homologous to mastoparans, the mast cell degranulating peptides from social wasp venoms; they are 14 amino acid residues in length, rich in hydrophobic and basic amino acids, and C-terminal amidated. Accordingly, these new peptides can belong to mastoparan peptides (in other words, linear cationic α-helical peptides). Indeed, the CD spectra of these new peptides showed predominantly α-helix conformation in TFE and SDS. In biological evaluation, both peptides exhibited potent antibacterial activity, moderate degranulation activity from rat peritoneal mast cells, and significant leishmanicidal activity, while they showed virtually no hemolytic activity on human or mouse erythrocytes. These results indicated that EMP-EM peptides rather strongly associated with bacterial cell membranes rather than mammalian cell membranes.
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Affiliation(s)
- Katsuhiro Konno
- Institute of Natural Medicine, University of Toyama, Toyama, Toyama 930-0194, Japan.
| | - Kohei Kazuma
- Institute of Natural Medicine, University of Toyama, Toyama, Toyama 930-0194, Japan.
| | - Marisa Rangel
- Immunopathology Laboratory, Butantan Institute, Sao Paulo SP 05503-900, Brazil.
| | - Joacir Stolarz-de-Oliveira
- Laboratory of Physiology and Animal Toxins, Federal University of West Pará, Santarém PA 68040-070, Brazil.
| | - Renato Fontana
- Department of Biological Sciences, State University of Santa Cruz, Ilhéus BA 45662-900, Brazil.
| | - Marii Kawano
- Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, Tsukuba, Ibaraki 305-0843, Japan.
| | - Hiroyuki Fuchino
- Research Center for Medicinal Plant Resources, National Institutes of Biomedical Innovation, Health and Nutrition, Tsukuba, Ibaraki 305-0843, Japan.
| | - Izumi Hide
- Department of Molecular and Pharmacological Neuroscience, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Hiroshima 734-8551, Japan.
| | - Tadashi Yasuhara
- Laboratory of Microbial Chemistry, School of Pharmacy, Kitasato University, Minato-ku, Tokyo 108-8641, Japan.
| | - Yoshihiro Nakata
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima 734-8553, Japan.
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Regueiras A, Pereira S, Costa MS, Vasconcelos V. Differential Toxicity of Cyanobacteria Isolated from Marine Sponges towards Echinoderms and Crustaceans. Toxins (Basel) 2018; 10:toxins10070297. [PMID: 30021957 PMCID: PMC6071129 DOI: 10.3390/toxins10070297] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/15/2018] [Accepted: 07/16/2018] [Indexed: 11/16/2022] Open
Abstract
Marine sponges and cyanobacteria have a long history of co-evolution, with documented genome adaptations in cyanobionts. Both organisms are known to produce a wide variety of natural compounds, with only scarce information about novel natural compounds produced by cyanobionts. In the present study, we aimed to address their toxicological potential, isolating cyanobacteria (n = 12) from different sponge species from the coast of Portugal (mainland, Azores, and Madeira Islands). After large-scale growth, we obtained both organic and aqueous extracts to perform a series of ecologically-relevant bioassays. In the acute toxicity assay, using nauplii of Artemia salina, only organic extracts showed lethality, especially in picocyanobacterial strains. In the bioassay with Paracentrotus lividus, both organic and aqueous extracts produced embryogenic toxicity (respectively 58% and 36%), pointing to the presence of compounds that interfere with growth factors on cells. No development of pluteus larvae was observed for the organic extract of the strain Chroococcales 6MA13ti, indicating the presence of compounds that affect skeleton formation. In the hemolytic assay, none of the extracts induced red blood cells lysis. Organic extracts, especially from picoplanktonic strains, proved to be the most promising for future bioassay-guided fractionation and compounds isolation. This approach allows us to classify the compounds extracted from the cyanobacteria into effect categories and bioactivity profiles.
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Affiliation(s)
- Ana Regueiras
- CIIMAR/CIMAR, Blue Biotechnology and Ecotoxicology-Centre of Environmental and Marine Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, Matosinhos 4450-208, Portugal.
- Department of Biology, Sciences Faculty, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal.
| | - Sandra Pereira
- CIIMAR/CIMAR, Blue Biotechnology and Ecotoxicology-Centre of Environmental and Marine Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, Matosinhos 4450-208, Portugal.
| | - Maria Sofia Costa
- CIIMAR/CIMAR, Blue Biotechnology and Ecotoxicology-Centre of Environmental and Marine Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, Matosinhos 4450-208, Portugal.
- Faculty of Pharmaceutical Sciences, University of Iceland, Hagi, Hofsvallagata 53, Reykjavik 107, Iceland.
| | - Vitor Vasconcelos
- CIIMAR/CIMAR, Blue Biotechnology and Ecotoxicology-Centre of Environmental and Marine Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, Matosinhos 4450-208, Portugal.
- Department of Biology, Sciences Faculty, University of Porto, Rua do Campo Alegre, Porto 4169-007, Portugal.
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17
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Proteomic of goat milk whey and its bacteriostatic and antitumour potential. Int J Biol Macromol 2018; 113:116-123. [DOI: 10.1016/j.ijbiomac.2018.01.200] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 01/24/2018] [Accepted: 01/30/2018] [Indexed: 01/07/2023]
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18
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Isopropyl Caffeate: A Caffeic Acid Derivative-Antioxidant Potential and Toxicity. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:6179427. [PMID: 29849905 PMCID: PMC5932986 DOI: 10.1155/2018/6179427] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 02/19/2018] [Accepted: 03/08/2018] [Indexed: 12/11/2022]
Abstract
Phenolic compounds, among them isopropyl caffeate, possess antioxidant potential, but not without toxicity and/or adverse effects. The present study aimed to evaluate the antioxidant activity and toxicity of isopropyl caffeate through in silico, in vitro and in vivo testing. The results showed that isopropyl caffeate presents no significant theoretical risk of toxicity, with likely moderate bioactivity: GPCR binding, ion channel modulation, nuclear receptor binding, and enzyme inhibition. Isopropyl caffeate induced hemolysis only at the concentrations of 500 and 1000 μg/ml. We observed types A and O erythrocyte protection from osmotic stress, no oxidation of erythrocytes, and even sequestrator and antioxidant behavior. However, moderate toxicity, according to the classification of GHS, was demonstrated through depressant effects on the central nervous system, though there was no influence on water and food consumption or on weight gain, and it did present possible hepatoprotection. We conclude that the effects induced by isopropyl caffeate are due to its antioxidant activity, capable of preventing production of free radicals and oxidative stress, a promising molecule with pharmacological potential.
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Antibacterial activity against cariogenic bacteria and cytotoxic and genotoxic potential of Anacardium occidentale L. and Anadenanthera macrocarpa (Benth.) Brenan extracts. Arch Oral Biol 2018; 85:113-119. [DOI: 10.1016/j.archoralbio.2017.10.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 10/09/2017] [Accepted: 10/10/2017] [Indexed: 02/07/2023]
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20
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Peptidomic analysis of the venom of the solitary bee Xylocopa appendiculata circumvolans. J Venom Anim Toxins Incl Trop Dis 2017; 23:40. [PMID: 28855917 PMCID: PMC5575948 DOI: 10.1186/s40409-017-0130-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 08/18/2017] [Indexed: 01/19/2023] Open
Abstract
Background Among the hymenopteran insect venoms, those from social wasps and bees – such as honeybee, hornets and paper wasps – have been well documented. Their venoms are composed of a number of peptides and proteins and used for defending their nests and themselves from predators. In contrast, the venoms of solitary wasps and bees have not been the object of further research. In case of solitary bees, only major peptide components in a few venoms have been addressed. Therefore, the aim of the present study was to explore the peptide component profile of the venom from the solitary bee Xylocopa appendiculata circumvolans by peptidomic analysis with using LC-MS. Methods A reverse-phase HPLC connected to ESI-OrbiTrap MS was used for LC-MS. On-line mass fingerprinting was made from TIC, and data-dependent tandem mass spectrometry gave MSMS spectra. A major peptide component was isolated by reverse-phase HPLC by conventional way, and its sequence was determined by Edman degradation, which was finally corroborated by solid phase synthesis. Using the synthetic specimen, biological activities (antimicrobial activity, mast cell devaluation, hemolysis, leishmanicidal activity) and pore formation in artificial lipid bilayer were evaluated. Results On-line mass fingerprinting revealed that the crude venom contained 124 components. MS/MS analysis gave 75 full sequences of the peptide components. Most of these are related to the major and novel peptide, xylopin. Its sequence, GFVALLKKLPLILKHLH-NH2, has characteristic features of linear cationic α-helical peptides; rich in hydrophobic and basic amino acids with no disulfide bond, and accordingly, it can be predicted to adopt an amphipathic α-helix secondary structure. In biological evaluation, xylopin exhibited broad-spectrum antimicrobial activity, and moderate mast cell degranulation and leishmanicidal activities, but showed virtually no hemolytic activity. Additionally, the peptide was able to incorporate pores in artificial lipid bilayers of azolectin, confirming the mechanism of the cytolytic activity by pore formation in biological membranes. Conclusions LC-ESI-MS and MS/MS analysis of the crude venom extract from a solitary bee Xylocopa appendiculata circumvolans revealed that the component profile of this venom mostly consisted of small peptides. The major peptide components, xylopin and xylopinin, were purified and characterized in a conventional manner. Their chemical and biological characteristics, belonging to linear cationic α-helical peptides, are similar to the known solitary bee venom peptides, melectin and osmin. Pore formation in artificial lipid bilayers was demonstrated for the first time with a solitary bee peptide.
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In Silico Study and Bioprospection of the Antibacterial and Antioxidant Effects of Flavone and Its Hydroxylated Derivatives. Molecules 2017; 22:molecules22060869. [PMID: 28538688 PMCID: PMC6152620 DOI: 10.3390/molecules22060869] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 05/14/2017] [Accepted: 05/20/2017] [Indexed: 12/14/2022] Open
Abstract
Flavonoid compounds are widely used as natural protective species, which can act as anti-inflammatory, antioxidant, anticoagulant, antihypertensive and antitumor agents. This study set out to investigate the probable pharmacological activities, along with the antibacterial and antioxidant effects, of flavone and its hydroxy derivatives: 3-hydroxyflavone, 5-hydroxyflavone and 6-hydroxyflavone. To do so, we investigated their pharmacological characteristics, using in silico tests that indicate likelihood of activity or inactivity, with the PASS online software, and the antimicrobial potential against Gram positive and Gram negative bacteria was also analyzed, including bacteria of clinical importance. We also tested for oxidant and antioxidant potential in these molecules in the presence of reactive oxygen species (ROS) and phenylhydrazine (Ph). The results revealed the following characteristics: pharmacological activities for the flavonoids as agonists of cell membrane integrity and as permeability inhibitors, as antagonists of anaphylatoxin receptors, as inhibitors of both kinase and peroxidase, and as having both antimutagenic capacity and vaso-protective potential. All of the flavonoids exhibited moderate antibacterial activity against Gram positive and Gram negative strains, with the flavones being bactericidal at 200 μg/mL for the strains of P. aeruginosa ATCC 8027, S. aureus ATCC 25619 and E. coli 104; the other flavonoids revealed bacteriostatic action. The substances did not promote erythrocyte oxidation and behaved as sequestrators and antioxidants of hydrogen peroxide (H2O2) and phenylhydrazine (Ph). It was concluded that the analyzed compounds have various pharmacological activities in accordance with the predictions of PASS online, as their antibacterial and antioxidant activities were confirmed. The study also helps to consolidate the use of computational chemistry in silico tools to guide new drug search and discovery protocols.
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E Lacerda RR, do Nascimento ES, de Lacerda JTJG, Pinto LDS, Rizzi C, Bezerra MM, Pinto IR, Filho SMP, Pinto VDPT, Filho GC, Gadelha CADA, Gadelha TS. Lectin from seeds of a Brazilian lima bean variety (Phaseolus lunatus L. var. cascavel) presents antioxidant, antitumour and gastroprotective activities. Int J Biol Macromol 2016; 95:1072-1081. [PMID: 27984144 DOI: 10.1016/j.ijbiomac.2016.10.097] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/28/2016] [Accepted: 10/27/2016] [Indexed: 12/29/2022]
Abstract
Lectins are proteins able to interact specifically and reversibly with carbohydrates. They are present in all living beings, particularly in legume seeds, which have many biological functions. The aim of this study was to isolate, characterize and verify antioxidant, anti-hemolytic, antitumor and gastroprotective activities in a lectin present in seeds of Phaseolus lunatus L. var. cascavel (PLUN). The isolation of lectin was performed by size exclusion chromatography on Sephadex G-100, which was isolated from a protein capable of agglutinating only human erythrocytes type A, being this the only inhibited haemagglutination n-acetyl-d-galactosamine. Its weight was estimated by PAGE is 128kDa. The lectin is thermostable up to 80°C and is active between pH 2-11. As 8M urea was able to denature the lectin. PLUN is a glycoprotein consisting of 2% carbohydrate and has antioxidant action with ascorbic acid equivalent antioxidant capacity (μMAA/g) of 418.20, 326 and 82.9 for total antioxidant activity, ABTS radical capture and capture of DPPH radical, respectively. The lectin has antitumor activity against melanoma derived cells at doses of 100 and 50mg/ml, reducing up to 83% tumor cells, and gastroprotective action, reducing up to 63% damaged area of the stomach induced by ethanol.
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Affiliation(s)
- Rodrigo Rodrigues E Lacerda
- Master by the Graduate Programme in Cellular and Molecular Biology at the Federal University of Paraíba (Universidade Federal da Paraíba), João Pessoa, Brazil.
| | | | | | | | - Caroline Rizzi
- Federal University of Pelotas (Universidade Federal de Pelotas), Pelotas, Brazil.
| | | | | | | | | | | | | | - Tatiane Santi Gadelha
- Federal University of Paraíba (Universidade Federal da Paraíba), João Pessoa, Brazil.
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OLIVEIRA CARLOSH, SIMÃO ANDERSONA, TRENTO MARCUSV, CÉSAR PEDROH, MARCUSSI SILVANA. Inhibition of proteases and phospholipases A2 from Bothrops atrox and Crotalus durissus terrificus snake venoms by ascorbic acid, vitamin E, and B-complex vitamins. AN ACAD BRAS CIENC 2016; 88:2005-2016. [DOI: 10.1590/0001-3765201620160030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 05/26/2016] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT The enzyme inhibition by natural and/ or low-cost compounds may represent a valuable adjunct to traditional serotherapy performed in cases of snakebite, mainly with a view to mitigate the local effects of envenoming. The objective of this study was to evaluate possible interactions between vitamins and enzymes that comprise Bothrops atrox and Crotalus durissus terrificus venoms, in vitro. Proteolysis inhibition assays (substrates: azocasein, collagen, gelatin and fibrinogen), hemolysis, coagulation, hemagglutination were carried out using different proportions of vitamins in face of to inhibit minimum effective dose of each venom. The vitamins were responsible for reducing 100% of breaking azocasein by C.d.t. venom, thrombolysis induced by B. atrox and fibrinogenolysis induced by both venoms. It is suggested the presence of interactions between vitamin and the active site of enzymes, for example the interactions between hydrophobic regions present in the enzymes and vitamin E, as well as the inhibitions exercised by antioxidant mechanism.
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da Silva ADS, de Melo E Silva K, Neto JC, Costa VCDO, Pessôa HDLF, Tavares JF, da Silva MS, Cavalcante FDA. Croton grewioides Baill. (Euphorbiaceae) Shows Antidiarrheal Activity in Mice. Pharmacognosy Res 2016; 8:202-5. [PMID: 27365990 PMCID: PMC4908850 DOI: 10.4103/0974-8490.181465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Based on chemotaxonomy, we decided to investigate the possible antidiarrheal activity in mice of a crude ethanolic extract obtained from aerial parts of Croton grewioides (CG-EtOH). We tested for any possible toxicity in rat erythrocytes and acute toxicity in mice. Antidiarrheal activity was assessed by determining the effect of CG-EtOH on defecation frequency, liquid stool, intestinal motility and intestinal fluid accumulation. CG-EtOH showed no in vitro cytotoxicity and was not orally lethal. In contrast, the extract given intraperitoneally (at 2000 mg/kg) was lethal, but only in females. CG-EtOH produced a significant and equipotent antidiarrheal activity, both in defecation frequency (ED50 = 106.0 ± 8.1 mg/kg) and liquid stools (ED50 = 105.0 ± 9.2 mg/kg). However, CG-EtOH (125 mg/kg) decreased intestinal motility by only 22.7% ± 4.4%. Moreover, extract markedly inhibited the castor oil-induced intestinal contents (ED50 = 34.6 ± 5.4 mg/kg). We thus conclude that CG-EtOH is not orally lethal and contains active principles with antidiarrheal activity, and this effect seems to involve mostly changes in intestinal secretion.
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Affiliation(s)
- Anne Dayse Soares da Silva
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Karoline de Melo E Silva
- Institute of Biological Sciences and Health, Federal University of Alagoas, Maceió 57020-720, AL, Brazil
| | - José Clementino Neto
- Institute of Biological Sciences and Health, Federal University of Alagoas, Maceió 57020-720, AL, Brazil
| | | | - Hilzeth de Luna F Pessôa
- Department of Molecular Biology, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Josean Fechine Tavares
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil; Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Marcelo Sobral da Silva
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil; Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
| | - Fabiana de Andrade Cavalcante
- Postgraduate Program in Natural Products and Synthetic Bioactive, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil; Department of Physiology and Pathology, Federal University of Paraíba, João Pessoa 58051-900, PB, Brazil
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Braga AA, e Lacerda RR, de Vasconcelos Medeiros GKV, Gonçalves GF, de Luna Freire Pessoa H, Cardoso JD, de Almeida Gadelha CA, da Silva BA, Santi-Gadelha T. Antibacterial and Hemolytic Activity of a new Lectin Purified from the Seeds of Sterculia Foetida L. Appl Biochem Biotechnol 2014; 175:1689-99. [DOI: 10.1007/s12010-014-1390-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 11/12/2014] [Indexed: 11/29/2022]
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Targino AGR, Flores MAP, dos Santos Junior VE, de Godoy Bené Bezerra F, de Luna Freire H, Galembeck A, Rosenblatt A. An innovative approach to treating dental decay in children. A new anti-caries agent. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:2041-2047. [PMID: 24818873 DOI: 10.1007/s10856-014-5221-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 04/19/2014] [Indexed: 06/03/2023]
Abstract
The aim of this work is to evaluate the antimicrobial and cytotoxic activity of a formulation containing silver nanoparticles and chitosan, provisionally called nano silver fluoride (NSF), against Streptococcus mutans in comparison to chlorhexidine and silver diamine fluoride (SDF). The product was characterised by transmission electron microscopy and UV-Vis absorption spectroscopy. The minimum inhibition concentration (MIC) was evaluated by the spectrophotometric microdilution method and turbidity. The minimum bactericide concentration (MBC) was evaluated in brain heart infusion plates, and cytotoxicity was evaluated by haemolytic activity. The MIC and MBC for NSF were, respectively, 33.54 ± 14.52 and 50.32 µg/mL; for SDF were 33.33 ± 14.43 and 50.0 µg/mL, respectively; and for CHX were 3.3 ± 0.5 and 6 µg/mL, respectively. An ANOVA for MIC gave P = 0.032, and for MBC P = 0.035. The cytotoxic effect of NSF compared to SDF demonstrated a statistically significant difference in the MIC value (t test P < 0.05). The NSF formulation may be effective against S. mutans with much lower doses, may have lower toxicity than SDF, and may not stain teeth.
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Affiliation(s)
- Andréa Gadelha Ribeiro Targino
- Department of Paediatric Dentistry, Faculty of Dentistry, University of Pernambuco, Av: Gal. Newton Cavalcanti nº 1650, Camaragibe, PE, CEP 54 753-020, Brazil,
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Rangel M, Martins JCG, Garcia AN, Conserva GAA, Costa-Neves A, Sant'Anna CL, de Carvalho LR. Analysis of the toxicity and histopathology induced by the oral administration of Pseudanabaena galeata and Geitlerinema splendidum (cyanobacteria) extracts to mice. Mar Drugs 2014; 12:508-24. [PMID: 24451192 PMCID: PMC3917284 DOI: 10.3390/md12010508] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 12/30/2013] [Accepted: 12/30/2013] [Indexed: 11/17/2022] Open
Abstract
Cyanobacteria are common members of the freshwater microbiota in lakes and drinking water reservoirs, and are responsible for several cases of human intoxications in Brazil. Pseudanabaena galeata and Geitlerinema splendidum are examples of the toxic species that are very frequently found in reservoirs in Sao Paulo, which is the most densely populated area in Brazil. In the search for toxic strains collected from water reservoirs and maintained in the Cyanobacterial Culture Collection (CCIBt) of the Institute of Botany of Brazil, the acetic acid extracts (AE) of P. galeata CCIBt 3082 and G. splendidum CCIBt 3223 were analyzed by planar chromatography, which indicated the absence of cyanotoxins. Animal tests were then carried out, and both extracts were found to induce toxic effects in mice when administered intraperitoneally. The present study aimed to investigate whether the oral ingestion of the above mentioned cyanobacteria extracts would also induce toxic effects in mice. Necropsy and histopathological studies were conducted using tissue samples from the animals, which were euthanized one week after the administration of the extracts. The AE of P. galeata did not cause death but did induce transient symptoms, including eyebrow ptosis, straub tail, and pain. The euthanized animals presented hemorrhage in the liver, whereas the histological analysis showed disorganization of the hepatic parenchyma, necrosis, hyperemia, and proximity of the centrilobular vein in the liver. In addition, alterations in the convoluted tubules of the kidneys were observed, and the lungs were unaffected. The AE of G. splendidum caused only one death, and induced transient symptoms, such as dyspnea, paralysis, and pain, in the other mice. The necropsy of the euthanized mice showed hemorrhage in the lungs and liver. The lungs presented hemorrhagic focuses, alveolar collapse, and granulomatous foci. The liver presented hemorrhagic and enlarged sinusoids, hyperemia, proximity of the centrilobular vein, and disorganization of the hepatic parenchyma. Some areas also exhibited an inflammatory infiltrate and calcified tissue inside blood vessels. Necrosis and rupture of the convoluted tubule cells were observed in the kidneys. Further analysis of the both extracts indicated the lack of hemolytic activity, and the presence of two unknown anti-AChE substances in the AE of G. splendidum. Thus, P. galeata and G. splendidum are producers of novel toxins that affect mammals when administered orally.
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Affiliation(s)
- Marisa Rangel
- Immunopathology Laboratory, Butantan Institute, Av. Vital Brasil, 1500, Sao Paulo SP 05503-900, Brazil.
| | - Joyce C G Martins
- Immunopathology Laboratory, Butantan Institute, Av. Vital Brasil, 1500, Sao Paulo SP 05503-900, Brazil.
| | - Angélica Nunes Garcia
- Phycology Section, Institute of Botany, Av. Miguel Stéfano, 3687, Sao Paulo SP 04301-902, Brazil.
| | - Geanne A A Conserva
- Phycology Section, Institute of Botany, Av. Miguel Stéfano, 3687, Sao Paulo SP 04301-902, Brazil.
| | - Adriana Costa-Neves
- Department of Genetics, Butantan Institute, Av. Vital Brasil, 1500, Sao Paulo SP 05503-900, Brazil.
| | - Célia Leite Sant'Anna
- Phycology Section, Institute of Botany, Av. Miguel Stéfano, 3687, Sao Paulo SP 04301-902, Brazil.
| | - Luciana Retz de Carvalho
- Phycology Section, Institute of Botany, Av. Miguel Stéfano, 3687, Sao Paulo SP 04301-902, Brazil.
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Leite JFM, Assreuy AMS, Mota MRL, Bringel PHDSF, e Lacerda RR, Gomes VDM, Cajazeiras JB, do Nascimento KS, Pessôa HDLF, Gadelha CADA, Delatorre P, Cavada BS, Santi-Gadelha T. Antinociceptive and anti-inflammatory effects of a lectin-like substance from Clitoria fairchildiana R. Howard seeds. Molecules 2012; 17:3277-90. [PMID: 22418929 PMCID: PMC6268884 DOI: 10.3390/molecules17033277] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 03/07/2012] [Accepted: 03/09/2012] [Indexed: 11/16/2022] Open
Abstract
Lectins are proteins that have the ability to bind specifically and reversibly to carbohydrates and glycoconjugates, without altering the structure of the glycosyl ligand. They are found in organisms such as viruses, plants and humans, and they have been shown to possess important biological activities. The objective of this study was to purify and characterize lectins in the seeds of Clitoria fairchildiana, as well as to verify their biological activities. The results indicated the presence of a lectin (CFAL) in the glutelin acid protein fraction, which agglutinated native rabbit erythrocytes. CFAL was purified by column chromatography ion-exchange, DEAE-Sephacel, which was obtained from a peak of protein retained in the matrix by applying 0.5 M NaCl using the step-wise method. Electrophoretic analysis of this lectin in SDS-PAGE indicated a two band pattern protein molecular mass of approximately 100 and 116 kDa. CFAL proved to be unspecific to all carbohydrates/glycoconjugates in common use for the sugar inhibition test. This lectin showed no significant cytotoxicity to human red blood cells. It was observed that CFAL has anti-inflammatory activity in the paw edema induced by carrageenan model, in which a 64% diminution in edema was observed. Antinociceptive effects were observed for CFAL in the abdominal writhing test (induced by acetic acid), in which increasing doses of the lectin caused reduction in the number of contortions by up to 72%. It was concluded that the purified and characterized lectin from the seeds of Clitoria fairchildiana has anti-inflammatory and antinociceptive activity, and is not cytotoxic to human erythrocytes.
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Affiliation(s)
- Joana Filomena Magalhães Leite
- Laboratory of Biologically Actives Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceará, P.O. Box 6043, CEP 60455-970 Fortaleza, Ceará, Brazil; (J.F.M.L.); (J.B.C.); (K.S.N.)
| | - Ana Maria Sampaio Assreuy
- Institute of Biomedical Sciences, State University of Ceará-Itaperi, CEP 60740-000, Fortaleza, Ceará, Brazil; (A.M.S.A.); (P.H.S.F.B.)
| | - Mário Rogério Lima Mota
- Faculty of Dentistry, Department of Pharmacy, Dentistry and Nursing, Federal University of Ceará, CEP 60430-160, Fortaleza, Ceará, Brazil; (M.R.L.M.)
| | | | - Rodrigo Rodrigues e Lacerda
- Department of Molecular Biology, Federal University of Paraíba, Campus I, CEP 58059-900, João Pessoa, Paraíba, Brazil; (R.R.L.); (V.M.G.); (H.L.F.P.); (C.A.A.G.); (P.D.)
| | - Vinícius de Morais Gomes
- Department of Molecular Biology, Federal University of Paraíba, Campus I, CEP 58059-900, João Pessoa, Paraíba, Brazil; (R.R.L.); (V.M.G.); (H.L.F.P.); (C.A.A.G.); (P.D.)
| | - João Batista Cajazeiras
- Laboratory of Biologically Actives Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceará, P.O. Box 6043, CEP 60455-970 Fortaleza, Ceará, Brazil; (J.F.M.L.); (J.B.C.); (K.S.N.)
| | - Kyria Santiago do Nascimento
- Laboratory of Biologically Actives Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceará, P.O. Box 6043, CEP 60455-970 Fortaleza, Ceará, Brazil; (J.F.M.L.); (J.B.C.); (K.S.N.)
| | - Hilzeth de Luna Freire Pessôa
- Department of Molecular Biology, Federal University of Paraíba, Campus I, CEP 58059-900, João Pessoa, Paraíba, Brazil; (R.R.L.); (V.M.G.); (H.L.F.P.); (C.A.A.G.); (P.D.)
| | - Carlos Alberto de Almeida Gadelha
- Department of Molecular Biology, Federal University of Paraíba, Campus I, CEP 58059-900, João Pessoa, Paraíba, Brazil; (R.R.L.); (V.M.G.); (H.L.F.P.); (C.A.A.G.); (P.D.)
| | - Plinio Delatorre
- Department of Molecular Biology, Federal University of Paraíba, Campus I, CEP 58059-900, João Pessoa, Paraíba, Brazil; (R.R.L.); (V.M.G.); (H.L.F.P.); (C.A.A.G.); (P.D.)
| | - Benildo Sousa Cavada
- Laboratory of Biologically Actives Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceará, P.O. Box 6043, CEP 60455-970 Fortaleza, Ceará, Brazil; (J.F.M.L.); (J.B.C.); (K.S.N.)
| | - Tatiane Santi-Gadelha
- Department of Molecular Biology, Federal University of Paraíba, Campus I, CEP 58059-900, João Pessoa, Paraíba, Brazil; (R.R.L.); (V.M.G.); (H.L.F.P.); (C.A.A.G.); (P.D.)
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Chemical and biological characterization of four new linear cationic α-helical peptides from the venoms of two solitary eumenine wasps. Toxicon 2011; 57:1081-92. [PMID: 21549739 DOI: 10.1016/j.toxicon.2011.04.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Revised: 04/13/2011] [Accepted: 04/19/2011] [Indexed: 11/20/2022]
Abstract
Four novel peptides were isolated from the venoms of the solitary eumenine wasps Eumenes rubrofemoratus and Eumenes fraterculus. Their sequences were determined by MALDI-TOF/TOF (matrix assisted laser desorption/ionization time-of-flight mass spectrometry) analysis, Edman degradation and solid-phase synthesis. Two of them, eumenitin-R (LNLKGLIKKVASLLN) and eumenitin-F (LNLKGLFKKVASLLT), are highly homologous to eumenitin, an antimicrobial peptide from a solitary eumenine wasp, whereas the other two, EMP-ER (FDIMGLIKKVAGAL-NH(2)) and EMP-EF (FDVMGIIKKIAGAL-NH(2)), are similar to eumenine mastoparan-AF (EMP-AF), a mast cell degranulating peptide from a solitary eumenine wasp. These sequences have the characteristic features of linear cationic cytolytic peptides; rich in hydrophobic and basic amino acids with no disulfide bond, and accordingly, they can be predicted to adopt an amphipathic α-helix secondary structure. In fact, the CD (circular dichroism) spectra of these peptides showed significant α-helical conformation content in the presence of TFE (trifluoroethanol), SDS (sodium dodecylsulfate) and asolectin vesicles. In the biological evaluation, all the peptides exhibited a significant broad-spectrum antimicrobial activity, and moderate mast cell degranulation and leishmanicidal activities, but showed virtually no hemolytic activity.
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Konno K, Rangel M, Oliveira JS, Dos Santos Cabrera MP, Fontana R, Hirata IY, Hide I, Nakata Y, Mori K, Kawano M, Fuchino H, Sekita S, Neto JR. Decoralin, a novel linear cationic alpha-helical peptide from the venom of the solitary eumenine wasp Oreumenes decoratus. Peptides 2007; 28:2320-7. [PMID: 17981364 DOI: 10.1016/j.peptides.2007.09.017] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2007] [Revised: 09/22/2007] [Accepted: 09/24/2007] [Indexed: 10/22/2022]
Abstract
A novel peptide, decoralin, was isolated from the venom of the solitary eumenine wasp Oreumenes decoratus. Its sequence, Ser-Leu-Leu-Ser-Leu-Ile-Arg-Lys-Leu-Ile-Thr, was determined by Edman degradation and corroborated by solid-phase synthesis. This sequence has the characteristic features of linear cationic alpha-helical peptides; rich in hydrophobic and basic amino acids with no disulfide bond, and accordingly, it can be predicted to adopt an amphipathic alpha-helix secondary structure. In fact, the CD spectra of decoralin in the presence of TFE or SDS showed a high alpha-helical conformation content. In a biological evaluation, decoralin exhibited a significant broad-spectrum antimicrobial activity, and moderate mast cell degranulation and leishmanicidal activities, but showed virtually no hemolytic activity. A synthetic analog with C-terminal amidation showed a much more potent activity in all the biological assays.
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Affiliation(s)
- Katsuhiro Konno
- Center for Applied Toxinology, Butantan Institute, São Paulo, SP 05503-900, Brazil.
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Rangel M, Konno K, Brunaldi K, Procopio J, De Freitas JC. Neurotoxic activity induced by a haemolytic substance in the extract of the marine sponge Geodia corticostylifera. Comp Biochem Physiol C Toxicol Pharmacol 2005; 141:207-15. [PMID: 16023894 DOI: 10.1016/j.cca.2005.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2005] [Revised: 06/16/2005] [Accepted: 06/18/2005] [Indexed: 11/28/2022]
Abstract
In our search for marine bioactive compounds we chose a Brazilian Coast sponge, Geodia corticostylifera (Demospongiae), whose extracts showed previously antibacterial and antifungal activities. In the present work we studied the following toxic properties of G. corticostylifera extract: neurotoxic (in mouse neuromuscular junction); mouse acute toxicity (IP) and haemolytic (against mouse and frog erythrocytes). Insertion of ionic channels in planar lipid bilayers in presence of a haemolytic purified fraction of the extract was observed. The toxic activities of G. corticostylifera crude extract are related to the formation of ionic pores in the cell membrane, which induce the release of haemoglobin from erythrocytes, and depolarization of nerve and muscle membranes. These last physiological effects cause the blockade of the diaphragm contractions, leading to death through respiratory arrest.
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Affiliation(s)
- Marisa Rangel
- Department of Physiology of Biosciences Institute and Marine Biology Center, University of Sao Paulo, Sao Paulo, 05508-900, SP, Brazil.
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Son BW, Cho YJ, Cho JS, Lee WK, Kim DS, Choi HD, Choi JS, Jung JH, Im KS, Choi WC. New galactolipids from the marine bacillariophycean microalga Nitzschia sp. NATURAL PRODUCT LETTERS 2002; 15:299-306. [PMID: 11841113 DOI: 10.1080/10575630108041296] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Two new galactopyranosyldiacylglycerols have been isolated from the marine bacillariophycean microalga Nitzschia sp. and their structures were determined as (2S)-3-O-beta-D-galactopyranosyl-1,2-di-O-(9Z-hexadecenoyl)glycerol (1) and (2S)-3-O-beta-D-galactopyranosyl-1-O-(5Z,8Z,11Z,14Z,17Z-eicosapentaenoyl)-2-O-(9Z-hexadecenoyl)glycerol (2) by physicochemical evidence.
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Affiliation(s)
- B W Son
- Department of Chemistry, Pukyong National University, Pusan, Korea
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