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Immuno-Dipstick for Colletotrichum gloeosporioides Detection: Towards On-Farm Application. BIOSENSORS 2022; 12:bios12020049. [PMID: 35200310 PMCID: PMC8869205 DOI: 10.3390/bios12020049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/11/2022] [Accepted: 01/15/2022] [Indexed: 11/16/2022]
Abstract
Early and quick detection of pathogens are crucial for managing the spread of infections in the biomedical, biosafety, food, and agricultural fields. While molecular diagnostics can offer the specificity and reliability in acute infectious diseases, detection of pathogens is often slowed down by the current benchtop molecular diagnoses, which are time consuming, labor intensive, and lack the mobility for application at the point-of-need. In this work, we developed a complete on-farm use detection protocol for the plant-devastating anthracnose agent: Colletotrichum gloeosporioides. Our methods combined a simplified DNA extraction on paper that is compatible with loop-mediated isothermal amplification (LAMP), coupled with paper-based immunoassay lateral flow sensing. Our results offer simple, quick, easy, and a minimally instrumented toolkit for Colletotrichum gloeosporioides detection. This scalable and adaptable platform is a valuable alternative to traditional sensing systems towards on-the-go pathogen detection in food and agriculture, biomedical, and other fields.
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Oussou-Azo AF, Nakama T, Nakamura M, Futagami T, Vestergaard MCM. Antifungal Potential of Nanostructured Crystalline Copper and Its Oxide Forms. NANOMATERIALS 2020; 10:nano10051003. [PMID: 32456302 PMCID: PMC7279545 DOI: 10.3390/nano10051003] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 02/07/2023]
Abstract
Copper has been used as an antimicrobial agent for over a century and is now being added to commercial fungicides. Nanomaterials have attracted much attention due to the special properties they have over their bulk form. We studied nanostructured copper (Cu-NPs), investigating the potential for improved antifungal properties derived from its special properties and studied any effect that the oxidation of copper (CuO-NPs) may have. We conducted this research against Colletotrichum gloeoesporioides, a devastating pathogen to plants/crops worldwide. Research on the effects of copper on this fungus are limited. Our studies showed that nanoforms of copper had significant antifungal activities, with Cu-NPs offering the most sustainable efficacy and was more effective than its oxidative form (CuO-NPs). Scanning Electron Microscopy (SEM) images of the treated pathogen show that the hyphae had a swollen appearance, lost their filamentous structure, and the mycelia had a powder-like structure, indicating the probable destruction of the hyphal tubular cell wall. X-ray Difractogram (XRD) outputs showed substantial changes in the physical characteristics of the Cu-NPs after interaction with the fungus. This is the first report to demonstrate chemo-physical changes in the metal compounds, opening new insights for further studies on the mechanism of copper’s antifungal properties.
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Affiliation(s)
- Auriane Fifame Oussou-Azo
- United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan; (A.F.O.-A.); (M.N.); (T.F.)
| | - Tomoki Nakama
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan;
| | - Masayuki Nakamura
- United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan; (A.F.O.-A.); (M.N.); (T.F.)
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan;
| | - Taiki Futagami
- United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan; (A.F.O.-A.); (M.N.); (T.F.)
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan;
| | - Mun’delanji Catherine M. Vestergaard
- United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima 890-0065, Japan; (A.F.O.-A.); (M.N.); (T.F.)
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan;
- Correspondence:
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Costa AV, Oliveira MVLD, Pinto RT, Moreira LC, Gomes EMC, Alves TDA, Pinheiro PF, Queiroz VTD, Vieira LFA, Teixeira RR, Júnior WCDJ. Synthesis of Novel Glycerol-Derived 1,2,3-Triazoles and Evaluation of Their Fungicide, Phytotoxic and Cytotoxic Activities. Molecules 2017; 22:E1666. [PMID: 28991165 PMCID: PMC6151794 DOI: 10.3390/molecules22101666] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 09/29/2017] [Accepted: 10/03/2017] [Indexed: 11/30/2022] Open
Abstract
The synthesis of a series of 1,2,3-triazoles using glycerol as starting material is described. The key step in the preparation of these triazolic derivatives is the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC), also known as click reaction, between 4-(azidomethyl)-2,2-dimethyl-1,3-dioxolane (3) and different terminal alkynes. The eight prepared derivatives were evaluated with regard to their fungicide, phytotoxic and cytotoxic activities. The fungicidal activity was assessed in vitro against Colletotrichum gloeosporioides, the causative agent of papaya anthracnose. It was found that the compounds 1-(1-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-1H-1,2,3-triazol-4-yl)-cyclo-hexanol (4g) and 2-(1-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-1H-1,2,3-triazol-4-yl)propan-2-ol (4h) demonstrated high efficiency in controlling C. gloeosporioides when compared to the commercial fungicide tebuconazole. The triazoles did not present any phytotoxic effect when evaluated against Lactuca sativa. However, five derivatives were mitodepressive, inducing cell death detected by the presence of condensed nuclei and acted as aneugenic agents in the cell cycle of L. sativa. It is believed that glycerol derivatives bearing 1,2,3-triazole functionalities may represent a promising scaffold to be explored for the development of new agents to control C. gloeosporioides.
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Affiliation(s)
- Adilson Vidal Costa
- Graduate Program in Agrochemistry, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | | | - Roberta Tristão Pinto
- Graduate Program in Agrochemistry, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | - Luiza Carvalheira Moreira
- Graduate Program in Agrochemistry, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | - Ediellen Mayara Corrêa Gomes
- Graduate Program in Plant Production, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | - Thammyres de Assis Alves
- Graduate Program in Biotechnology, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | - Patrícia Fontes Pinheiro
- Graduate Program in Agrochemistry, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | - Vagner Tebaldi de Queiroz
- Graduate Program in Agrochemistry, Universidade Federal do Espírito Santo, Alto Universitário, S/N, Guararema, Alegre ES 29500-000, Brazil.
| | | | - Robson Ricardo Teixeira
- Departament of Chemistry, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, Viçosa MG 36570-900, Brazil.
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Fardin K, Young M. Antifungal potential of Avicennia schaueriana
Stapf & Leech. (Acanthaceae) against Cladosporium
and Colletotrichum
species. Lett Appl Microbiol 2015; 61:50-7. [DOI: 10.1111/lam.12423] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 03/19/2015] [Accepted: 03/20/2015] [Indexed: 11/30/2022]
Affiliation(s)
- K.M. Fardin
- Núcleo de Pesquisa em Fisiologia e Bioquímica; Instituto de Botânica de São Paulo; São Paulo SP Brazil
| | - M.C.M. Young
- Núcleo de Pesquisa em Fisiologia e Bioquímica; Instituto de Botânica de São Paulo; São Paulo SP Brazil
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Rampersad SN. Multiple applications of Alamar Blue as an indicator of metabolic function and cellular health in cell viability bioassays. SENSORS (BASEL, SWITZERLAND) 2012; 12:12347-60. [PMID: 23112716 PMCID: PMC3478843 DOI: 10.3390/s120912347] [Citation(s) in RCA: 602] [Impact Index Per Article: 50.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 08/21/2012] [Accepted: 08/31/2012] [Indexed: 02/07/2023]
Abstract
Accurate prediction of the adverse effects of test compounds on living systems, detection of toxic thresholds, and expansion of experimental data sets to include multiple toxicity end-point analysis are required for any robust screening regime. Alamar Blue is an important redox indicator that is used to evaluate metabolic function and cellular health. The Alamar Blue bioassay has been utilized over the past 50 years to assess cell viability and cytotoxicity in a range of biological and environmental systems and in a number of cell types including bacteria, yeast, fungi, protozoa and cultured mammalian and piscine cells. It offers several advantages over other metabolic indicators and other cytotoxicity assays. However, as with any bioassay, suitability must be determined for each application and cell model. This review seeks to highlight many of the important considerations involved in assay use and design in addition to the potential pitfalls.
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Affiliation(s)
- Sephra N Rampersad
- Department of Life Sciences, The University of the West Indies, West Indies, St Augustine, Trinidad and Tobago.
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