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da Silva AAR, da Silva Júnior JJ, Cavalcanti MIDS, Machado DC, Medeiros PL, Rodrigues CG. Alphatoxin Nanopore Detection of Aflatoxin, Ochratoxin and Fumonisin in Aqueous Solution. Toxins (Basel) 2023; 15:toxins15030183. [PMID: 36977074 PMCID: PMC10058818 DOI: 10.3390/toxins15030183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 02/23/2023] [Accepted: 02/26/2023] [Indexed: 03/08/2023] Open
Abstract
Mycotoxins are toxic and carcinogenic metabolites produced by groups of filamentous fungi that colonize food crops. Aflatoxin B1 (AFB1), ochratoxin A (OTA) and fumonisin B1 (FB1) are among the most relevant agricultural mycotoxins, as they can induce various toxic processes in humans and animals. To detect AFB1, OTA and FB1 in the most varied matrices, chromatographic and immunological methods are primarily used; however, these techniques are time-consuming and expensive. In this study, we demonstrate that unitary alphatoxin nanopore can be used to detect and differentiate these mycotoxins in aqueous solution. The presence of AFB1, OTA or FB1 inside the nanopore induces reversible blockage of the ionic current flowing through the nanopore, with distinct characteristics of blockage that are unique to each of the three toxins. The process of discrimination is based on the residual current ratio calculation and analysis of the residence time of each mycotoxin inside the unitary nanopore. Using a single alphatoxin nanopore, the mycotoxins could be detected at the nanomolar level, indicating that alphatoxin nanopore is a promising molecular tool for discriminatory analysis of mycotoxins in aqueous solution.
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Affiliation(s)
- Artur Alves Rodrigues da Silva
- Education and Health Center, Federal University of Campina Grande, Rua Aprígio Veloso, 882, Universitário, Campina Grande 58429-900, Brazil
- Postgraduate Program in Therapeutic Innovation, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
| | - Janilson José da Silva Júnior
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
| | - Maria Isabel dos Santos Cavalcanti
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
| | - Dijanah Cota Machado
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
| | - Paloma Lys Medeiros
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
| | - Claudio Gabriel Rodrigues
- Postgraduate Program in Therapeutic Innovation, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Avenida Professor Moraes Rego, s/n, Cidade Universitária, Recife 50670-901, Brazil
- Correspondence: ; Tel.: +55-81-2126-8535
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Silva PM, Silva JNO, Silva BR, Ferreira GRS, Gaião WDC, Recio MV, Gonçalves GGA, Rodrigues CG, Medeiros PL, Brayner FA, Alves LC, Larsen MH, Ingmer H, Napoleão TH, Paiva PMG. Antibacterial effects of the lectin from pomegranate sarcotesta (PgTeL) against Listeria monocytogenes. J Appl Microbiol 2021; 131:671-681. [PMID: 33342053 DOI: 10.1111/jam.14978] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 12/18/2022]
Abstract
AIMS To investigate the effects of the lectin from Punica granatum sarcotesta (PgTeL) on growth, viability, cell structure, biofilm formation and chitinase activity of Listeria monocytogenes. In addition, the effect of PgTeL on the adhesion and invasion of human cells (HeLa) was determined. METHODS AND RESULTS PgTeL showed bacteriostatic and bactericidal effects on the strains L. monocytogenes N53-1 and EGD-e, causing morphometric alterations, cell aggregation, strong deformation and cell disruption. PgTeL inhibited biofilm formation by EGD-e and N53-1 and also interfered with the adhesion and invasion processes of EGD-e and N53-1 in HeLa cells. Finally, the chitinase activity of L. monocytogenes EGD-e was reduced in the presence of PgTeL, which can be involved in the inhibition of adhesion process. CONCLUSION PgTeL is an antibacterial agent against L. monocytogenes, inhibiting growth and promoting cell death, as well as impairing biofilm formation and bacterial adhesion and invasion into human cells. SIGNIFICANCE AND IMPACT OF THE STUDY The results stimulate future investigations on the potential of PgTeL for protection of contamination in food products.
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Affiliation(s)
- P M Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - J N O Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - B R Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - G R S Ferreira
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - W D C Gaião
- Departamento de Biofísica e Radiobiologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - M V Recio
- Department of Veterinary and Animal Sciences, University of Copenhagen, Copenhagen, Denmark
| | - G G A Gonçalves
- Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, Brazil.,Departamento de Parasitologia, Instituto Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, Brazil
| | - C G Rodrigues
- Departamento de Biofísica e Radiobiologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - P L Medeiros
- Departamento de Histologia e Embriologia, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - F A Brayner
- Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, Brazil.,Departamento de Parasitologia, Instituto Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, Brazil
| | - L C Alves
- Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, Brazil.,Departamento de Parasitologia, Instituto Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, Brazil
| | - M H Larsen
- Department of Veterinary and Animal Sciences, University of Copenhagen, Copenhagen, Denmark
| | - H Ingmer
- Department of Veterinary and Animal Sciences, University of Copenhagen, Copenhagen, Denmark
| | - T H Napoleão
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - P M G Paiva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
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Cavalcanti da Silva E, Dias Rayol C, Medeiros PL, Figueiredo RCBQ, Piuvezan MR, Brabosa-Filho JM, Fernandes Marinho A, Silva TG, Militão GCG, Pimentel Cassilhas AP, Paes de Andrade P. Antileishmanial activity of warifteine: a bisbenzylisoquinoline alkaloid isolated from Cissampelos sympodialis Eichl. (Menispermaceae). ScientificWorldJournal 2012; 2012:516408. [PMID: 22973173 PMCID: PMC3438738 DOI: 10.1100/2012/516408] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/25/2012] [Indexed: 11/17/2022] Open
Abstract
Leishmania (L.) chagasi is the etiological agent of visceral leishmaniasis, an important endemic zoonosis in the American continent, as well as in many other countries in Asia, Africa, and Mediterranean Europe. The treatment is difficult due to the high toxicity of the available drugs, high costs, and emergence of resistance in the parasites. Therefore, there is an urgent need for new leishmanicidal agents. The bisbenzylisoquinoline alkaloids have been related to antibacterial, antiprotozoal, and antifungal activities. The aim of this study was to evaluate the growth inhibitory activity of warifteine (bisbenzylisoquinoline alkaloid) against L. chagasi promastigotes in axenic cultures and the occurrence of drug-induced ultrastructural changes in the parasite. This bisbenzylisoquinoline alkaloid was isolated from the leaves and roots of Cissampelos sympodialis Eichl. (Menispermaceae), a plant commonly used for the treatment of various diseases in Brazilian folk medicine. Using the purified warifteine, the 50% inhibitory concentration (IC₅₀) was determined at 0.08 mg/mL after 72 h in culture, inducing significant changes in the parasite morphology, like aberrant multisepted forms and blebs in the plasma membrane. In conclusion, warifteine represents an attractive candidate for future pharmacological studies aiming new leishmanicidal drugs.
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Affiliation(s)
- Eliete Cavalcanti da Silva
- Departamento de Histologia e Embriologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego 1265, Cidade Universitária, 50670-901 Recife, PE, Brazil.
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Beltrão EIC, Medeiros PL, Rodrigues OG, Figueredo-Silva J, Valença MM, Coelho LCBB, Carvalho LB. Parkia pendula lectin as histochemistry marker for meningothelial tumour. Eur J Histochem 2003; 47:139-42. [PMID: 12777210 DOI: 10.4081/819] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 11/23/2022] Open
Abstract
Lectins have been intensively used in histochemical techniques for cell surface characterization. These proteins are involved in several biological processes and their use as histochemical markers have been evaluated since they can indicate differences in cell surfaces. Parkia pendula lectin (PpeL) was evaluated as histochemical marker for meningothelial meningioma biopsies. Tissue slices were incubated with PpeL conjugated to horseradish peroxidase (PpeL-HRP) and Concanavalin A-HRP (ConA-HPR) and the binding visualized with diaminobenzidine and hydrogen peroxide. The lectin-tissue binding was inhibited with D-glucose. PpeL showed to be a useful tool for the characterization of meningothelial tumour and clinico-pathological diagnosis.
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Affiliation(s)
- E I C Beltrão
- Laboratorio de Imunopatologia Keizo Asami - LIKA; Recife, Pernambuco, Brasil
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