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Fernández H, Zon MA, Maccio SA, Alaníz RD, Di Tocco A, Carrillo Palomino RA, Cabas Rodríguez JA, Granero AM, Arévalo FJ, Robledo SN, Pierini GD. Multivariate Optimization of Electrochemical Biosensors for the Determination of Compounds Related to Food Safety-A Review. Biosensors (Basel) 2023; 13:694. [PMID: 37504093 PMCID: PMC10377565 DOI: 10.3390/bios13070694] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 07/29/2023]
Abstract
We summarize the application of multivariate optimization for the construction of electrochemical biosensors. The introduction provides an overview of electrochemical biosensing, which is classified into catalytic-based and affinity-based biosensors, and discusses the most recent published works in each category. We then explore the relevance of electrochemical biosensors for food safety analysis, taking into account analytes of different natures. Then, we describe the chemometrics tools used in the construction of electrochemical sensors/biosensors and provide examples from the literature. Finally, we carefully discuss the construction of electrochemical biosensors based on design of experiments, including the advantages, disadvantages, and future perspectives of using multivariate optimization in this field. The discussion section offers a comprehensive analysis of these topics.
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Affiliation(s)
- Héctor Fernández
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Sabrina Antonella Maccio
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Rubén Darío Alaníz
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Aylen Di Tocco
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Roodney Alberto Carrillo Palomino
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Jose Alberto Cabas Rodríguez
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Adrian Marcelo Granero
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Fernando J Arévalo
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Sebastian Noel Robledo
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
- Departamento de Tecnología Química (IDAS), Facultad de Ingeniería, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
| | - Gastón Darío Pierini
- Grupo de Electroanalítica (GEANA), Departamento de Química, Instituto para el Desarrollo Agroindustrial y de la Salud UNRC-CONICET (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina
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Andaur M, Sobarzo V, Chacón N, Aravena Y, Fernández H, Rogel R, Escandón-Nagel N, Huircapán P, Medina G, Letelier P, Leyan P, Boguen R, Hernández A, Guzmán N. [Knowledge and HIV/AIDS risk behaviors of Chilean adolescents attending urban and rural schools. Is it necessary to focus the prevention strategies according to territorial relevance?]. Rev Med Chil 2023; 151:428-434. [PMID: 38687517 DOI: 10.4067/s0034-98872023000400428] [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: 12/20/2021] [Accepted: 01/10/2023] [Indexed: 05/02/2024]
Abstract
BACKGROUND HIV infection has sustained increased in the Chilean young population. In order to focus on sexual education in adolescents, it is first necessary to establish the degree of knowledge and risk behaviors in this group. Therefore, this study aimed to compare the degree of knowledge and HIV/AIDS risk behaviors in adolescents from rural and urban schools. MATERIAL AND METHODS The study included 385 adolescents between 14 and 18 years old. Through an anonymous survey, sociodemographic data, knowledge about HIV/ AIDS, risk behaviors, and ways of accessing information were collected. RESULTS A third of the adolescents surveyed (33.6%) reported having initiated sexual activity, primarily men. Rural students showed lower knowledge of HIV/AIDS. 32.2% of individuals who initiated sexual activity reported nonuse or rarely use of condoms, and only 4.4% of students have had an HIV detection/diagnostic test. Although the students had received information mainly from their teachers, they reported that if they needed help, they would go to health centers, youth programs, and, to a lesser extent, to teachers. They also preferred access to information in workshops, on the Internet, and social networks. CONCLUSIONS We observed regular knowledge of HIV/AIDS among adolescents. Rural students showed less knowledge and several risk behaviors. These findings emphasize the need to establish sexual education strategies in adolescents, considering the territory and the use of new technologies.
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Affiliation(s)
- Marcela Andaur
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Valeska Sobarzo
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Natalia Chacón
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Yerty Aravena
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Héctor Fernández
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Rebeca Rogel
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Neli Escandón-Nagel
- Departamento de Psicología, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Patricia Huircapán
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Gustavo Medina
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Pablo Letelier
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Pilar Leyan
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Rodrigo Boguen
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Alfonso Hernández
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
| | - Neftalí Guzmán
- Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco, Chile
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Blandon-Naranjo L, Alaniz RD, Zon MA, Fernández H, Marcelo Granero A, Robledo SN, Pierini GD. Development of a voltammetric electronic tongue for the simultaneous determination of synthetic antioxidants in edible olive oils. Talanta 2022; 261:124123. [DOI: 10.1016/j.talanta.2022.124123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 11/18/2022] [Accepted: 11/20/2022] [Indexed: 11/24/2022]
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Darío Pierini G, Andrés Bortolato S, Noel Robledo S, Raquel Alcaraz M, Fernández H, Casimiro Goicoechea H, Alicia Zon M. Second-order electrochemical data generation to quantify carvacrol in oregano essential oils. Food Chem 2022; 368:130840. [PMID: 34450499 DOI: 10.1016/j.foodchem.2021.130840] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/17/2021] [Accepted: 08/09/2021] [Indexed: 12/28/2022]
Abstract
A novel analytical method using voltammetric second-order modeling based on multivariate curve resolution-alternating least-square (MCR-ALS) is presented for the first time for the quantitation of carvacrol (CAR) in oregano essential oils (OEO). The second-order cyclic voltammetry data were generated on the basis that CAR shows a diffusional system. Thus, the scan rate (v) was used as a second instrumental mode and cyclic voltammograms at different v were acquired for a single sample, generating the second-order data. CAR determination was performed in presence of thymol, included as a potential interferent. Results demonstrated that MCR-ALS successfully exploited the second-order advantage and the recoveries were not statistically different than 100%. The limits of detection and quantitation were estimated using the MCR-ALS which were 6.27 × 10-5°mol°L-1°and 1.90 × 10-4°mol L-1, respectively. Finally, the developed methodology was implemented to quantify of CAR in OEO samples.
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Affiliation(s)
- Gastón Darío Pierini
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina.
| | - Santiago Andrés Bortolato
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina; Instituto de Química Rosario (IQUIR, CONICET-UNR), Suipacha 570 (S2002LRL), Rosario, Argentina.
| | - Sebastian Noel Robledo
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina; Departamento de Tecnología Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ingeniería, Universidad Nacional de Río Cuarto, Agencia Postal N°3 (5800), Río Cuarto, Argentina.
| | - Mirta Raquel Alcaraz
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina; Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral-CONICET, Ciudad Universitaria, Santa Fe S3000ZAA, Argentina.
| | - Héctor Fernández
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina.
| | - Héctor Casimiro Goicoechea
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina; Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral-CONICET, Ciudad Universitaria, Santa Fe S3000ZAA, Argentina.
| | - María Alicia Zon
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CABA C1425FQB, Argentina.
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Narata AP, Obradó L, Moyano RK, Macho JM, Blasco J, Rueda AL, Roman LS, Remollo S, Marinelli C, Cepeda R, Fernández H, Larrabide I. Cerebral Aneurysm Occlusion at 12-Month Follow-Up After Flow-Diverter Treatment: Statistical Modeling for V&V With Real-World Data. Front Med Technol 2022; 3:705003. [PMID: 35047944 PMCID: PMC8757794 DOI: 10.3389/fmedt.2021.705003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/20/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Flow-Diverter (FD) porosity has been pointed as a critical factor in the occlusion of cerebral aneurysms after treatment. Objective: Verification and Validation of computational models in terms of predictive capacity, relating FD porosity and occlusion after cerebral aneurysms treatment. Methods: Sixty-four aneurysms, with pre-treatment and follow-up images, were considered. Patient demographics and aneurysm morphological information were collected. The computational simulation provided by ANKYRAS provided FD porosity, expansion, and mesh angle. FD occlusion was assessed and recorded from follow-up images. Multiple regression Logit and analysis of covariance (ANCOVA) models were used to model the data with both categorical and continuous models. Results: Occlusion of the aneurysm after 12 months was affected by aneurysm morphology but not by FD mesh morphology. A Time-To-Occlusion (TTO) of 6.92 months on average was observed with an SE of 0.24 months in the aneurysm population surveyed. TTO was estimated with statistical significance from the resulting model for the data examined and was capable of explaining 92% of the data variation. Conclusions: Porosity was found to have the most correction power when assessing TTO, proving its importance in the process of aneurysm occlusion. Still, further Verification and Validation (V&V) of treatment simulation in more extensive, multi-center, and randomized databases is required.
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Affiliation(s)
| | - Laura Obradó
- Neurovascular Unit, Galgo Medical S. L., Barcelona, Spain
| | | | - Juan M Macho
- CDI, Hospital Clinic of Barcelona, Barcelona, Spain
| | - Jordi Blasco
- CDI, Hospital Clinic of Barcelona, Barcelona, Spain
| | | | | | - Sebastian Remollo
- Area de Neurociencias, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
| | | | | | | | - Ignacio Larrabide
- Neurovascular Unit, Galgo Medical S. L., Barcelona, Spain.,Pladema-CONICET/UNICEN, Tandil, Argentina
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Pierini GD, Maccio SA, Robledo SN, Ferrari AGM, Banks CE, Fernández H, Zon MA. Screen-printed electrochemical-based sensor for taxifolin determination in edible peanut oils. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Lopez JC, Zon MA, Fernández H, Granero AM. Development of an enzymatic biosensor to determine eugenol in dental samples. Talanta 2020; 210:120647. [PMID: 31987210 DOI: 10.1016/j.talanta.2019.120647] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 11/17/2022]
Abstract
A GCE/CRGO-βCD's/ADA-SPE/AuNPs biosensor was successfully developed to determine eugenol in dental samples. The optimal conditions to construct the biosensor were obtained from an experimental design based on the response surfaces methodology. The GCE/CRGO-βCD/ADA-SPE/AuNPs biosensor exhibited a very good analytical performance for the quantification of eugenol. Thus, it shows a linear range between 1.3 × 10-8 and 1 × 10-5 mol L-1, with a sensitivity of (5.3 ± 0.3) x 10-3 A mol-1 L. The limits of detection and quantification were 4 × 10-9 mol L-1 and 1.3 × 10-8 mol L-1, respectively. Biosensors had an intraday and inter day reproducibility of 5% and 8%, respectively. The repeatability was of 3%, and the stability was 21 days (a decrease of 30% in current responses was observed after the fourth week). Recovery studies were performed in order to validate the proposed method. Recovery percentages were between 94 and 108%. A value of the apparent Michaellis-Menten constant, KMapp, of 3.1 × 10-6 mol L-1 was obtained using both Lineweaver-Burk and Eadi-Hofstee methods.
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Affiliation(s)
- Jimena Claudia Lopez
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N(o) 3, 5800, Río Cuarto, Argentina.
| | - María Alicia Zon
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N(o) 3, 5800, Río Cuarto, Argentina.
| | - Héctor Fernández
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N(o) 3, 5800, Río Cuarto, Argentina.
| | - Adrian Marcelo Granero
- Departamento de Química, Grupo GEANA, Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N(o) 3, 5800, Río Cuarto, Argentina.
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Medina G, Leyán P, da Silva CV, Flores-Martin S, Manosalva C, Fernández H. Intra-amoebic localization of Arcobacter butzleri as an endocytobiont of Acanthamoeba castellanii. Arch Microbiol 2019; 201:1447-1452. [PMID: 31302710 DOI: 10.1007/s00203-019-01699-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/19/2019] [Accepted: 07/01/2019] [Indexed: 11/29/2022]
Abstract
Acanthamoeba castellanii is a free-living amoeba found mainly in humid environments and Arcobacter butzleri is an emerging zoonotic pathogen, both can establish in vitro endosymbiotic relationships in the absence of bacterial replication. We analyzed the localization of A. butzleri within A. castellanii establishing their association with endoplasmic reticulum vesicles and mitochondria. Through confocal microscopy, we observed that during the early stages of endosymbiosis, there is not colocalization between amoebic vacuoles containing A. butzleri and mitochondria or ER vesicles of A. castellanii. Considering that energy production of this bacterium occurs via metabolism of amino acids or the tricarboxylic acid cycle, these results contribute to explain the absence of bacterial replication, since A. butzleri would not have access to the nutrients found in endoplasmic reticulum vesicles and mitochondria. In addition, we observe that A. butzleri induces significantly the actin polymerization of A. castellanii during the early stages of endosymbiosis.
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Affiliation(s)
- G Medina
- Faculty of Health Sciences, Department of Diagnostic Processes and Evaluation, Universidad Católica de Temuco, PO. BOX 15-D, Temuco, Chile.
| | - P Leyán
- Faculty of Health Sciences, Department of Diagnostic Processes and Evaluation, Universidad Católica de Temuco, PO. BOX 15-D, Temuco, Chile
| | - C Viera da Silva
- Institute of Biomedical Sciences, Universidade Federal de Uberlândia, Av. Amazonas, Bloco 6T, Campus Umuarama, CEP, Uberlândia, MG, 38400-902, Brazil
| | - S Flores-Martin
- Institute of Clinical Microbiology,Faculty of Medicine, Universidad Austral de Chile, PO. BOX 567, Valdivia, Chile
| | - C Manosalva
- Institute of Pharmacy, Faculty of Science, Universidad Austral de Chile, Valdivia, Chile
| | - H Fernández
- Institute of Clinical Microbiology,Faculty of Medicine, Universidad Austral de Chile, PO. BOX 567, Valdivia, Chile
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Ochoa S, Martínez OA, Fernández H, Collado L. Comparison of media and growth conditions for culturing enterohepatic Helicobacter species. Lett Appl Microbiol 2019; 69:190-197. [PMID: 31220348 DOI: 10.1111/lam.13192] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 03/12/2019] [Revised: 06/07/2019] [Accepted: 06/14/2019] [Indexed: 01/05/2023]
Abstract
This research aims to compare the culturing conditions for enterohepatic Helicobacter, evaluating culture media, incubation atmosphere and susceptibility to antimicrobials used to generate selective conditions. Four common media for the closely related genus Campylobacter (Columbia, Bolton, Brucella and CCDA agar), as well as the need for hydrogen in the microaerobic incubation atmosphere, were evaluated. Serial dilutions of 13 strains belonging to six species (H. apodemus, H. bilis, H. canicola, H. canis, H. equorum and Helicobacter sp.) were inoculated in each media and incubated at 37°C for 48 to 96 h using CampyGen (OXOID) and gaseous exchange (including hydrogen) in parallel. Columbia or Brucella agars were the most appropriate for culturing EHH (P < 0·05). However, there was no significant difference between the atmospheres evaluated (P = 0·13). In addition, minimal inhibitory concentration for six antibiotics showed that all isolates were resistant to trimethoprim, whereas for the rest of the antibiotics (cephalothin, cefoperazone, cefsulodin, teicoplanin and vancomycin) the inhibition range was between 8 and 64 μg ml- 1 . Our findings suggest that Columbia or Brucella media, regardless of the use of hydrogen, can be used for the EHH isolation. In addition, the concentration of antibiotics included in commercial campylobacteria supplements is suitable for EHH species recovery. SIGNIFICANCE AND IMPACT OF THE STUDY: Enterohepatic Helicobacter (EHH) infections have been associated with several diseases in humans such as acute gastroenteritis, inflammatory bowel disease and hepatobiliary diseases. Although they are frequently detected in clinical samples by molecular methods, only occasionally they are isolated using culture conditions described for the taxonomic related pathogen Campylobacter sp. This is because the optimal conditions for the isolation of EHH have not yet been described, which results in an underestimation of the prevalence and clinical importance of these emerging pathogens. Therefore, this study provides insight for culturing EHH species.
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Affiliation(s)
- S Ochoa
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.,Millennium Nucleus in the Biology of Intestinal Microbiota, Santiago, Chile
| | - O A Martínez
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - H Fernández
- Instituto de Microbiología Clínica, Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile
| | - L Collado
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.,Millennium Nucleus in the Biology of Intestinal Microbiota, Santiago, Chile
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Díaz Nieto CH, Granero AM, Garcia D, Nesci A, Barros G, Zon MA, Fernández H. Development of a third-generation biosensor to determine sterigmatocystin mycotoxin: An early warning system to detect aflatoxin B 1. Talanta 2019; 194:253-258. [PMID: 30609527 DOI: 10.1016/j.talanta.2018.10.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 01/15/2023]
Abstract
A third-generation enzymatic biosensor was developed to quantify sterigmatocystin (STEH). It was based on a glassy carbon electrode modified with a composite of the soybean peroxidase enzyme (SPE) and chemically reduced graphene oxide. The optimal conditions to construct the biosensor were obtained through an experimental design based on the response surfaces methodology. The experiments were performed in 0.1 mol L-1 phosphate buffer solution, pH 5. Amperometric measurements were carried out at - 0.09 V vs Ag/AgCl (3 mol L-1 NaCl). The biosensor showed a lineal response in the concentration range from 6.9 × 10-9 to 5.0 × 10-7 mol L-1. The limit of detection was 2.3 × 10-9 mol L-1 for a signal: noise ratio of 3: 1. Values of the apparent Michaellis-Menten constant, KMapp, obtained by using both Lineweaver-Burk and Eadi-Hofstee methods were (1.5 ± 0.2) × 10-6 and (1.2 ± 0.2) × 10-6 mol L-1, respectively. STEH was analyzed in corn samples spiked with STEH, with an average recovery of 96.5%. The biosensor was also used to determine STEH in corn samples inoculated with the Aspergillus flavus fungus, which is an aflatoxins producer. Considering that STEH is a precursor of aflatoxin B1 (AFB1) in its biological transformation, its decrease over time was related to the production of AFB1. The STEH concentration determined using the biosensor was in very good agreement with that determined by HPLC.
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Affiliation(s)
- C H Díaz Nieto
- Centro de Investigación y Desarrollo en Materiales Avanzados y Almacenamiento de Energía de Jujuy-CIDMEJu (CONICET-Universidad Nacional de Jujuy), Centro de Desarrollo Tecnológico General Manuel Savio, Palpalá 4612 Jujuy, Argentina.
| | - A M Granero
- Departamento de Química, Grupo GEANA, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, 5800 Río Cuarto, Argentina.
| | - D Garcia
- Departamento de Microbiología, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, 5800 Río Cuarto, Argentina.
| | - A Nesci
- Departamento de Microbiología, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, 5800 Río Cuarto, Argentina.
| | - G Barros
- Departamento de Microbiología, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, 5800 Río Cuarto, Argentina.
| | - M A Zon
- Departamento de Química, Grupo GEANA, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, 5800 Río Cuarto, Argentina.
| | - H Fernández
- Departamento de Química, Grupo GEANA, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, 5800 Río Cuarto, Argentina.
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Lopez JC, Zon MA, Fernández H, Granero AM, Robledo SN. Determination of kinetic parameters of the enzymatic reaction between soybean peroxidase and natural antioxidants using chemometric tools. Food Chem 2019; 275:161-168. [PMID: 30724183 DOI: 10.1016/j.foodchem.2018.08.145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022]
Abstract
The oxidation of eugenol, isoeugenol and vanillin natural antioxidants catalyzed by the soybean peroxidase enzyme was studied using uv-vis spectroscopy. An experimental design was used to optimize the different variables. The multivariate curve resolution method was used to obtain the profiles of antioxidant absorbance's as a function of time due to uv-vis absorption bands of both antioxidants and the enzymatic reaction product/s show a strong overlap. From these results, apparent Michaelis-Menten constants as well as the kinetic parameters k1 and k3 involved in the catalytic cycle of peroxidases were calculated. The antioxidant apparent acidity constants were also determined at different pH's from uv-vis spectrophotometric measurements. Values of k1 were (0.6 ± 0.1) × 105 M-1 s-1, (2.0 ± 0.2) × 105 M-1 s-1 and (7.0 ± 0.5) × 106 M-1 s-1 and k3 (4.0 ± 0.2) × 105 M-1 s-1, (6.0 ± 0.6) × 105 M-1 s-1 and (6.0 ± 0.9) × 106 M-1 s-1 for eugenol, isoeugenol and vanillin, respectively.
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Affiliation(s)
- Jimena Claudia Lopez
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina.
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina.
| | - Héctor Fernández
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina.
| | - Adrian Marcelo Granero
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina.
| | - Sebastián Noel Robledo
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina; Departamento de Tecnología Química, Facultad de Ingeniería, Universidad Nacional de Río Cuarto, Agencia Postal N° 3, 5800 Río Cuarto, Argentina.
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Riberi WI, Zon MA, Fernández H, Arévalo FJ. Optimization of a nanostructured surface for the development of electrochemical immunosensors. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Di Tocco A, Porcal GV, Riberi WI, Zon MA, Fernández H, Robledo SN, Arévalo FJ. Synthesis of stable CdS nanocrystals using experimental design: optimization of the emission. NEW J CHEM 2019. [DOI: 10.1039/c9nj02145k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This work investigates CdS nanocrystal synthesis by applying chemometric tools. Very good reproducibility of nanocrystals of CdS was obtained.
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Affiliation(s)
- Aylén Di Tocco
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Gabriela Valeria Porcal
- Grupo de Fotoquímica
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Walter Iván Riberi
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Héctor Fernández
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Sebastian Noel Robledo
- Grupo de Electroanalítica (GEANA)
- Departamento de Tecnología Química
- Facultad de Ingeniería
- Universidad Nacional de Río Cuarto
- Instituto para el desarrollo agroindustrial y de la salud (IDAS)
| | - Fernando Javier Arévalo
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
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Robledo SN, Pierini GD, Nieto CHD, Fernández H, Zon MA. Development of an electrochemical method to determine phenolic monoterpenes in essential oils. Talanta 2018; 196:362-369. [PMID: 30683377 DOI: 10.1016/j.talanta.2018.12.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 12/16/2022]
Abstract
A simple, rapid and non-expensive method is proposed to determine phenolic monoterpenes such as thymol and carvacrol in essential oils of thyme and oregano. The linear sweep voltammetry based on glassy carbon electrodes was the electrochemical technique used. Thymol and carvacrol have one main oxidation peak in non-aqueous media centered at about 1.3 V vs. Ag/AgCl. The electron transfer process is mainly diffusion controlled. The calibration plots generated using the commercial standards of thymol and carvacrol were used to estimate the total content in real samples. The calibration plots were linear in the concentration range from 8.5 × 10-5 to 1.3 × 10-3 mol L-1 and 7.9 × 10-5 to 1.2 × 10-3 mol L-1 for thymol and carvacrol, respectively. Results obtained with the electrochemical method are in good agreement with those of the official method (gas chromatography). In addition, the analytical procedure does not require previous preparation of the sample or modification of the electrode surface. The electrochemical technique used is very simple to apply. Under these conditions, the methodology proposed is a good, simple and fast option to perform a quality control of essential oils.
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Affiliation(s)
- Sebastian Noel Robledo
- Departamento de Tecnología Química, Facultad de Ingeniería, Universidad Nacional de Río Cuarto, Agencia Postal N°3, 5800 Río Cuarto, Argentina; Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N°3, 5800 Río Cuarto, Argentina.
| | - Gastón Darío Pierini
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N°3, 5800 Río Cuarto, Argentina.
| | - César Horacio Díaz Nieto
- Centro de Investigación y Desarrollo en Materiales Avanzados y Almacenamiento de Energía de Jujuy-CIDMEJu, Centro de Desarrollo Tecnológico General Manuel Savio, Palpalá 4612, Jujuy, Argentina.
| | - Héctor Fernández
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N°3, 5800 Río Cuarto, Argentina.
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N°3, 5800 Río Cuarto, Argentina.
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Díaz Nieto CH, Granero AM, Zon MA, Fernández H. Sterigmatocystin: A mycotoxin to be seriously considered. Food Chem Toxicol 2018; 118:460-470. [DOI: 10.1016/j.fct.2018.05.057] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/23/2018] [Accepted: 05/25/2018] [Indexed: 01/25/2023]
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16
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Pierini GD, Robledo SN, Zon MA, Di Nezio MS, Granero AM, Fernández H. Development of an electroanalytical method to control quality in fish samples based on an edge plane pyrolytic graphite electrode. Simultaneous determination of hypoxanthine, xanthine and uric acid. Microchem J 2018. [DOI: 10.1016/j.microc.2017.12.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Hoyos-Arbeláez J, Ramírez García G, Arévalo FJ, Vázquez M, Fernández H, Gutiérrez Granados S. Electrochemical determination of mangiferin using glassy carbon electrodes modified with carbonaceous nanomaterials. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.11.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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18
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Pierini GD, Foster CW, Rowley-Neale SJ, Fernández H, Banks CE. A facile electrochemical intercalation and microwave assisted exfoliation methodology applied to screen-printed electrochemical-based sensing platforms to impart improved electroanalytical outputs. Analyst 2018; 143:3360-3365. [DOI: 10.1039/c7an01982c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An Electrochemical Derived Intercalation process is explored as a modification for screen-printed electrodes to improve their electroanalytical outputs.
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Affiliation(s)
- Gastón D. Pierini
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
- 5800 Río Cuarto
| | - Christopher W. Foster
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester M1 5GD
- UK
| | | | - Héctor Fernández
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
- 5800 Río Cuarto
| | - Craig E. Banks
- Faculty of Science and Engineering
- Manchester Metropolitan University
- Manchester M1 5GD
- UK
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19
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Viviana Tarditto L, Alicia Zon M, García Ovando H, Roberto Vettorazzi N, Javier Arévalo F, Fernández H. Electrochemical magneto immunosensor based on endogenous β-galactosidase enzyme to determine enterotoxicogenic Escherichia coli F4 (K88) in swine feces using square wave voltammetry. Talanta 2017; 174:507-513. [DOI: 10.1016/j.talanta.2017.06.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 12/12/2022]
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20
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Maza E, Fernández H, Zon MA, Moressi MB. Electrochemical determination of fisetin using gold electrodes modified with thiol self-assembled monolayers. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.02.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Robledo SN, López JC, Granero AM, Zensich MA, Morales GM, Fernández H, Zon MA. Characterization of the surface redox process of caffeic acid adsorbed at glassy carbon electrodes modified with partially reduced graphene oxide. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Tarditto LV, Arévalo FJ, Zon MA, Ovando HG, Vettorazzi NR, Fernández H. Electrochemical sensor for the determination of enterotoxigenic Escherichia coli in swine feces using glassy carbon electrodes modified with multi-walled carbon nanotubes. Microchem J 2016. [DOI: 10.1016/j.microc.2016.03.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Nieto CHD, Granero AM, Zon MA, Fernández H. Novel electrochemical properties of an emergent mycotoxin: sterigmatocystin. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2015.11.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Pinto L, Díaz Nieto CH, Zón MA, Fernández H, de Araujo MCU. Handling time misalignment and rank deficiency in liquid chromatography by multivariate curve resolution: Quantitation of five biogenic amines in fish. Anal Chim Acta 2016; 902:59-69. [DOI: 10.1016/j.aca.2015.10.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 10/27/2015] [Accepted: 10/28/2015] [Indexed: 12/01/2022]
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Vizzotti C, Pippo T, Urueña A, Altuna J, Palópoli G, Hernández M, Artola M, Fernández H, Orellano P, Cañero-Velasco M, Ciocca M, Ramonet M, Diosque M. Economic analysis of the single-dose immunization strategy against hepatitis A in Argentina. Vaccine 2015; 33 Suppl 1:A227-32. [DOI: 10.1016/j.vaccine.2014.12.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 12/17/2014] [Accepted: 12/18/2014] [Indexed: 10/23/2022]
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27
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Osuna Y, Sandoval J, Saade H, López RG, Martinez JL, Colunga EM, de la Cruz G, Segura EP, Arévalo FJ, Zon MA, Fernández H, Ilyina A. Immobilization of Aspergillus niger lipase on chitosan-coated magnetic nanoparticles using two covalent-binding methods. Bioprocess Biosyst Eng 2015; 38:1437-45. [DOI: 10.1007/s00449-015-1385-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/26/2015] [Indexed: 10/23/2022]
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Díaz Toro PC, Arévalo FJ, Zon MA, Fernández H. Studies of the electrochemical behavior of moniliformin mycotoxin and its sensitive determination at pretreated glassy carbon electrodes in a non-aqueous medium. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2014.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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González-Techera A, Zon MA, Molina PG, Fernández H, González-Sapienza G, Arévalo FJ. Development of a highly sensitive noncompetitive electrochemical immunosensor for the detection of atrazine by phage anti-immunocomplex assay. Biosens Bioelectron 2014; 64:650-6. [PMID: 25441414 DOI: 10.1016/j.bios.2014.09.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/17/2014] [Accepted: 09/20/2014] [Indexed: 10/24/2022]
Abstract
The development of immunosensors for the detection of small molecules is of great interest because of their simplicity, high sensitivity and extended analytical range. Due to their size, small compounds cannot be simultaneously recognized by two antibodies impeding their detection by noncompetitive two-site immunoassays, which are superior to competitive ones in terms of sensitivity, kinetics, and working range. In this work, we combine the advantages of magneto-electrochemical immunosensors with the improved sensitivity and direct proportional signal of noncompetitive immunoassays to develop a new Phage Anti-Immunocomplex Electrochemical Immunosensor (PhAIEI) for the detection of the herbicide atrazine. The noncompetitive assay is based on the use of recombinant M13 phage particles bearing a peptide that specifically recognizes the immunocomplex of atrazine with an anti-atrazine monoclonal antibody. The PhAIEI performed with a limit of detection (LOD) of 0.2 pg mL(-1), which is 200-fold better than the LOD obtained using the same antibody in an optimized conventional competitive ELISA, with a large increase in working range. The developed PhAIEI was successfully used to assay undiluted river water samples with no pretreatment and excellent recoveries. Apart from the first demonstration of the benefits of integrating phage anti-immunocomplex particles into electrochemical immunosensors, the extremely low and environmentally relevant detection limits of atrazine attained with the PhAIEIS may have direct applicability to fast and sensitive detection of this herbicide in the environment.
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Affiliation(s)
- Andrés González-Techera
- Cátedra de Inmunología, Facultad de Química, Instituto de Higiene, UDELAR, Av. A. Navarro 3051, piso 2, Montevideo 11600, Uruguay
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina
| | - Patricia Gabriela Molina
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina
| | - Héctor Fernández
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina
| | - Gualberto González-Sapienza
- Cátedra de Inmunología, Facultad de Química, Instituto de Higiene, UDELAR, Av. A. Navarro 3051, piso 2, Montevideo 11600, Uruguay.
| | - Fernando Javier Arévalo
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina.
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Robledo SN, Zachetti VGL, Zon MA, Fernández H. Quantitative determination of tocopherols in edible vegetable oils using electrochemical ultra-microsensors combined with chemometric tools. Talanta 2013; 116:964-71. [PMID: 24148502 DOI: 10.1016/j.talanta.2013.08.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 08/05/2013] [Accepted: 08/08/2013] [Indexed: 11/15/2022]
Abstract
We have developed an electroanalytical method to quantify different isomers of tocopherols in edible vegetable oils. The method uses the square wave voltammetry on a carbon fiber disk ultramicroelectrode in benzene/ethanol+0.1 mol L(-1)H2SO4. Because the oxidation peaks of these natural antioxidants show an important overlapping, we have used two chemometric tools to obtain the multivariate calibration model. One method was the multivariate curve resolution-alternating least square (MCR-ALS), which assumes a linear behavior, i.e., the total signal is the sum of individual signals of components, and another nonlinear method such as artificial neuronal networks (ANNs). From the accuracy and precision analysis between nominal and estimated concentrations by both methods, we could infer that the ANNs method was a good model to quantify tocopherols in edible oil samples. Recovery percentages were between 94% and 99%. In addition, we found a difference of 1.4-6.8% between the total content of tocopherols in edible oil samples and the vitamin E content declared by the manufacturers.
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Affiliation(s)
- Sebastián Noel Robledo
- Departamento de Tecnología Química, Facultad de Ingeniería, Universidad Nacional de Río Cuarto, Agencia Postal No. 3 (5800)-Río Cuarto, Córdoba, Argentina
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Plaza EM, Céspedes P, Fernández H, Sánchez-Guiu MI, Egea JM, Vicente V, Lozano ML, Rivera J. Quality assessment of buffy-coat-derived leucodepleted platelet concentrates in PAS-plasma, prepared by the OrbiSac or TACSI automated system. Vox Sang 2013; 106:38-44. [DOI: 10.1111/vox.12072] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/26/2013] [Accepted: 06/29/2013] [Indexed: 11/26/2022]
Affiliation(s)
- E. M. Plaza
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - P. Céspedes
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - H. Fernández
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - M. I. Sánchez-Guiu
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - J. M. Egea
- Servicio de Bioquímica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - V. Vicente
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - M. L. Lozano
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
| | - J. Rivera
- Centro Regional de Hemodonación; Servicio de Hematología y Oncología Médica; Hospital Universitario Morales Meseguer Universidad de Murcia; Murcia Spain
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Damián Chanique G, Heraldo Arévalo A, Alicia Zon M, Fernández H. Eletrochemical reduction of patulin and 5-hydroxymethylfurfural in both neutral and acid non-aqueous media. Their electroanalytical determination in apple juices. Talanta 2013; 111:85-92. [DOI: 10.1016/j.talanta.2013.02.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 02/13/2013] [Accepted: 02/17/2013] [Indexed: 11/29/2022]
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Maza EM, Moressi MB, Fernández H, Zon MA. Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Zachetti VGL, Granero AM, Robledo SN, Zon MA, Rosa CAD, Fernández H. Electrochemical reduction of the mycotoxin citrinin at bare and modified with multi-walled carbon nanotubes glassy carbon electrodes in a non-aqueous reaction medium. J BRAZIL CHEM SOC 2012. [DOI: 10.1590/s0103-50532012000600019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Arévalo FJ, González-Techera A, Zon MA, González-Sapienza G, Fernández H. Ultra-sensitive electrochemical immunosensor using analyte peptidomimetics selected from phage display peptide libraries. Biosens Bioelectron 2012; 32:231-7. [DOI: 10.1016/j.bios.2011.12.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 12/08/2011] [Accepted: 12/13/2011] [Indexed: 11/27/2022]
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El-Sharkawy I, El Kayal W, Prasath D, Fernández H, Bouzayen M, Svircev AM, Jayasankar S. Identification and genetic characterization of a gibberellin 2-oxidase gene that controls tree stature and reproductive growth in plum. J Exp Bot 2012; 63:1225-39. [PMID: 22080981 PMCID: PMC3276086 DOI: 10.1093/jxb/err345] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 09/19/2011] [Accepted: 10/05/2011] [Indexed: 05/20/2023]
Abstract
Several dwarf plum genotypes (Prunus salicina L.), due to deficiency of unknown gibberellin (GA) signalling, were identified. A cDNA encoding GA 2-oxidase (PslGA2ox), the major gibberellin catabolic enzyme in plants, was cloned and used to screen the GA-deficient hybrids. This resulted in the identification of a dwarf plum hybrid, designated as DGO24, that exhibits a markedly elevated PslGA2ox signal. Grafting 'Early Golden' (EG), a commercial plum cultivar, on DGO24 (EG/D) enhanced PslGA2ox accumulation in the scion part and generated trees of compact stature. Assessment of active GAs in such trees revealed that DGO24 and EG/D accumulated relatively much lower quantities of main bioactive GAs (GA(1) and GA(4)) than control trees (EG/M). Moreover, the physiological function of PslGA2ox was studied by determining the molecular and developmental consequences due to ectopic expression in Arabidopsis. Among several lines, two groups of homozygous transgenics that exhibited contrasting phenotypes were identified. Group-1 displayed a dwarf growth pattern typical of mutants with a GA deficiency including smaller leaves, shorter stems, and delay in the development of reproductive events. In contrast, Group-2 exhibited a 'GA overdose' phenotype as all the plants showed elongated growth, a typical response to GA application, even under limited GA conditions, potentially due to co-suppression of closely related Arabidopsis homologous. The studies reveal the possibility of utilizing PslGA2ox as a marker for developing size-controlling rootstocks in Prunus.
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Affiliation(s)
- I. El-Sharkawy
- University of Guelph, Department of Plant Agriculture. 4890 Victoria Av. N., PO Box 7000 Vineland Station, ON, L0R 2E0 Canada
| | - W. El Kayal
- University of Alberta, Department of Biological Sciences, Edmonton, AB, T6G 2E9 Canada
| | - D. Prasath
- University of Guelph, Department of Plant Agriculture. 4890 Victoria Av. N., PO Box 7000 Vineland Station, ON, L0R 2E0 Canada
| | - H. Fernández
- Laboratorio de Fisiología Vegetal Dpt. BOS, Universidad de Oviedo, c) Catedrático R Uría s/n, Oviedo, E-33071, Spain
| | - M. Bouzayen
- UMR 990 INRA/INPT-ENSAT ‘Génomique et Biotechnologie des Fruits’, Av. de l’Agrobiopole, BP 32607, F-31326 Castanet-Tolosan Cedex, France
| | - A. M. Svircev
- Agriculture and Agri-Food Canada, Southern Crop Protection and Food Research Centre. 4902 Victoria Av. N., PO Box 6000 Vineland Station, ON L0R 2E0 Canada
| | - S. Jayasankar
- University of Guelph, Department of Plant Agriculture. 4890 Victoria Av. N., PO Box 7000 Vineland Station, ON, L0R 2E0 Canada
- To whom correspondence should be addressed. E-mail:
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Baroni EE, Rubio S, Rodríguez C, De Lucas JJ, Fernández H, Andrés MS. Pharmacokinetic interactions of marbofloxacin with anti-inflammatory drugs in buffalo calves. Vet Rec 2011; 169:182. [DOI: 10.1136/vr.d4012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- E. E. Baroni
- Cátedra de Farmacología y Toxicología; Facultad de Ciencias Veterinarias; Universidad Nacional del Litoral; 3080 Esperanza Santa Fe Argentina
| | - S. Rubio
- Departamento de Toxicología y Farmacología; Facultad de Veterinaria; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - C. Rodríguez
- Departamento de Toxicología y Farmacología; Facultad de Veterinaria; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - J. J. De Lucas
- Departamento de Toxicología y Farmacología; Facultad de Veterinaria; Universidad Complutense de Madrid; 28040 Madrid Spain
| | - H. Fernández
- Cátedra de Farmacología y Toxicología; Facultad de Ciencias Veterinarias; Universidad Nacional del Litoral; 3080 Esperanza Santa Fe Argentina
| | - M. S. Andrés
- Departamento de Toxicología y Farmacología; Facultad de Veterinaria; Universidad Complutense de Madrid; 28040 Madrid Spain
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Perrotta PR, Vettorazzi NR, Arévalo FJ, Granero AM, Chulze SN, Zón MA, Fernández H. Electrochemical Studies of Ochratoxin A Mycotoxin at Gold Electrodes Modified with Cysteamine Self-Assembled Monolayers. Its Ultrasensitive Quantification in Red Wine Samples. ELECTROANAL 2011. [DOI: 10.1002/elan.201100094] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Spirito S, Campi S, Boquet M, Fernández H, Ferrari M. Equine sperm nuclei with different ploidy levels: relationship between the nuclear DNA content and the nuclear area. Andrologia 2011; 43:248-53. [PMID: 21486405 DOI: 10.1111/j.1439-0272.2010.01059.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The aims of this study were to estimate the ability of the Feulgen reaction to identify equine sperm nuclei with different ploidy levels, to determine the frequency of haploid, diploid and polyploid sperm nuclei in the semen of fertile equines and to evaluate the relationship between the nuclear DNA content and the nuclear area. Determination of the ploidy level of Feulgen-stained spermatozoa using a scanning microspectrophotometer was very similar to the subjective estimations made with a light microscope. This indicates that the Feulgen reaction is a simple, inexpensive and reliable technique to recognise the ploidy level of equine spermatozoa. The incidence of diploid and polyploid spermatozoa, determined with a light microscope in 11 fertile equines, was 0.17 ± 0.08% and 0.027 ± 0.027% respectively. DNA content values obtained by microspectrophotometry in the only equine that presented polyploid spermatozoa allowed us to discriminate between haploid, diploid and polyploid subpopulations. Measurement of the nuclear area discriminated only two subpopulations: one including the haploid and diploid subpopulations and the other including the polyploid one. The similarity between the area of the haploid and diploid sperm nuclei suggests that the increase in DNA content is anisotropic, with a privileged direction of growth perpendicular to the nuclear flattening plane.
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Affiliation(s)
- S Spirito
- Area Física Biológica, UBA, Ciudad Autónoma de Buenos Aires, Argentina
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Bertolino FA, De Vito IE, Messina GA, Fernández H, Raba J. Microfluidic-enzymatic biosensor with immobilized tyrosinase for electrochemical detection of pipemidic acid in pharmaceutical samples. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2010.12.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Tesio AY, Granero AM, Fernández H, Zón MA. Characterization of the surface redox process of adsorbed morin at glassy carbon electrodes. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.11.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Arévalo FJ, Granero AM, Fernández H, Raba J, Zón MA. Citrinin (CIT) determination in rice samples using a micro fluidic electrochemical immunosensor. Talanta 2010; 83:966-73. [PMID: 21147345 DOI: 10.1016/j.talanta.2010.11.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 10/29/2010] [Accepted: 11/01/2010] [Indexed: 10/18/2022]
Abstract
The development of an electrochemical immunosensor incorporated in a micro fluidic cell for quantification of citrinin (CIT) mycotoxin in rice samples is described for the first time. Both CIT present in rice samples and immobilized on a gold surface electrodeposited on a glassy carbon (GC) electrode modified with a cysteamine self-assembled monolayer were allowed to compete for the monoclonal mouse anti-CIT IgG antibody (mAb-CIT) present in solution. Then, an excess of rabbit anti mouse IgG (H+L) labelled with the horseradish peroxidase (secAb-HRP) was added, which reacts with the mAb-CIT which is in the immuno-complex formed with the immobilized CIT on the electrode surface. The HPR, in the presence of hydrogen peroxide (H(2)O(2)) catalyzes the oxidation of catechol (H(2)Q) whose back electrochemical reduction was detected on a GC electrode at -0.15 V vs Ag/AgCl by amperometric measurements. The current measured is proportional to the enzymatic activity and inversely proportional to the amount of CIT present in the rice samples. This immunosensor for CIT showed a range of work between 0.5 and 50 ng mL(-1). The detection (LOD) and the quantification (LOQ) limits were 0.1 and 0.5 ng mL(-1), respectively. The coefficients of variation intra- and inter-assays were less than 6%. The electrochemical detection could be done within 2 min and the assay total time was 45 min. The immunosensor was provided to undertake at least 80 determinations for different samples with a minimum previous pre-treatment. Our electrochemical immunosensor showed a higher sensitivity and reduced analysis time compared to other analytical methods such as chromatographic methods. This methodology is fast, selective and very sensitive. Thus, the immunosensor showed to be a very useful tool to determine CIT in samples of cereals, mainly rice samples.
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Affiliation(s)
- Fernando Javier Arévalo
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, (5800)-Río Cuarto, Argentina
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Granero AM, Fernández H, Agostini E, Zón MA. An amperometric biosensor based on peroxidases from Brassica napus for the determination of the total polyphenolic content in wine and tea samples. Talanta 2010; 83:249-55. [DOI: 10.1016/j.talanta.2010.09.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 09/10/2010] [Accepted: 09/14/2010] [Indexed: 10/19/2022]
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Abul Y, Menéndez V, Gómez-Campo C, Revilla MA, Lafont F, Fernández H. Occurrence of plant growth regulators in Psilotum nudum. J Plant Physiol 2010; 167:1211-3. [PMID: 20488581 DOI: 10.1016/j.jplph.2010.03.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Revised: 03/18/2010] [Accepted: 03/19/2010] [Indexed: 05/10/2023]
Abstract
The endogenous content of the auxin indole-3-acetic acid (IAA), the cytokinins trans-zeatin (tZ), trans-zeatin riboside (tZR), dihydrozeatin (DHZ), dihydrozeatin riboside (DHZR), isopentenyladenine (iP) and isopentenyladenosine (iPR), the gibberellins GA(1), GA(3), GA(4), GA(7), GA(9) and GA(20) in the rhizome and aerial shoots during and after sporogenesis were measured by high-performance liquid chromatography-tandem mass spectrometry in the fern Psilotum nudum. The present study shows, for the first time, the presence of the auxin IAA, the cytokinins tZR, DHZR and iP, and the gibberellins GA(4), GA(9) and GA(20) in the rhizome and aerial shoots of this species and suggests a possible role of gibberellins in the evolution of ferns.
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Affiliation(s)
- Y Abul
- Area de Fisiología Vegetal, Departamento Biología de Organismos y Sistemas, Oviedo, Spain
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Arévalo FJ, Messina GA, Molina PG, Zón MA, Raba J, Fernández H. Determination of progesterone (P4) from bovine serum samples using a microfluidic immunosensor system. Talanta 2010; 80:1986-92. [DOI: 10.1016/j.talanta.2009.10.059] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2009] [Revised: 10/22/2009] [Accepted: 10/23/2009] [Indexed: 12/01/2022]
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Affiliation(s)
| | - L. Otth
- Universidad Austral de Chile, Chile
| | - R Aron
- Universidad Austral de Chile, Chile
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Ramírez EA, Zón MA, Ulloa PAJ, Squella JA, Vergara LN, Fernández H. Adsorption of ochratoxin A (OTA) anodic oxidation product on glassy carbon electrodes in highly acidic reaction media: Its thermodynamic and kinetics characterization. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.09.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Tajima K, Fernández H, López-Ibor JL, Carrasco JL, Díaz-Marsá M. Schizophrenia treatment. Critical review on the drugs and mechanisms of action of antipsychotics. Actas Esp Psiquiatr 2009; 37:330-342. [PMID: 20066585] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Schizophrenic treatment was developed during the second half of the last century, mainly within the context of the development of antipsychotic drugs. Even though there has been significant progress due to the availability and use of multiple drugs, these can still be classified into three basic groups of antipsychotic drugs (atypical antipsychotics, typical antipsychotics and dopamine partial agonist antipsychotics). Their primary antipsychotic mechanism is still the action on the dopamine systems. Many of the second-generation antipsychotics are believed to offer advantages over first-generation agents in the treatment for schizophrenia. However, the drug properties that provide the different therapeutic effects from those of the first generation are not clear and some adverse effects may still affect the patient's health and quality of life. Furthermore, the efficacy of the antipsychotics is limited. This has led to the use of adjuvant medications to strengthen the treatment effects. On the other hand, work is being done on the development of new research lines to develop new non-dopaminergic antipsychotic drugs, with not very successful results. The aim of this paper is to make a brief review on the current therapeutic armamentarium for schizophrenia, the strategies to develop drugs, and theories of mechanisms of action of antipsychotics. Emphasis is placed on the new therapeutic targets for the development of future treatments.
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Affiliation(s)
- K Tajima
- Hospital Clínico San Carlos, Madrid, Spain
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Arévalo FJ, Molina PG, Zón MA, Fernández H. Studies about the adsorption of progesterone (P4) at glassy carbon electrodes in aqueous buffer solution by square wave voltammetry. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.02.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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