1
|
Torres-Salvador F, Ojeda J, Castro C, Gerasimova Y, Chumbimuni-Torres K. A Single Electrochemical Biosensor Designed to Detect Any Virus. Anal Chem 2024; 96:5752-5756. [PMID: 38560822 DOI: 10.1021/acs.analchem.3c05962] [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] [Indexed: 04/04/2024]
Abstract
Viruses are the primary cause of many infectious diseases in both humans and animals. Various testing methods require an amplification step of the viral RNA sample before detection, with quantitative reverse transcription polymerase chain reaction (RT-qPCR) being one of the most widely used along with lesser-known methods like Nucleic Acid Sequence-Based Amplification (NASBA). NASBA offers several advantages, such as isothermal amplification and high selectivity for specific sequences, making it an attractive option for low-income facilities. In this research, we employed a single electrochemical biosensor (E-Biosensor) designed for potentially detecting any virus by modifying the NASBA protocol. In this modified protocol, a reverse primer is designed with an additional 22-nucleotide sequence (tag region) at the 5'-end, which is added to the NASBA process. This tag region becomes part of the final amplicon generated by NASBA. It can hybridize with a single specific E-Biosensor probe set, enabling subsequent virus detection. Using this approach, we successfully detected three different viruses with a single E-Biosensor design, demonstrating the platform's potential for virus detection.
Collapse
Affiliation(s)
| | - Julio Ojeda
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Cynthia Castro
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Yulia Gerasimova
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Karin Chumbimuni-Torres
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| |
Collapse
|
2
|
Ojeda J, Torres-Salvador F, Bruno N, Eastwood H, Gerasimova Y, Chumbimuni-Torres K. Highly reproducible electrochemical biosensor for Influenza A virus towards low-resource settings. Anal Methods 2024; 16:772-779. [PMID: 38230437 DOI: 10.1039/d3ay01825c] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
A highly reproducible electrochemical biosensor, employing a five-stranded four-way junction (5S-4WJ) system through square wave voltammetry, has been successfully validated for the detection of Influenza A virus (InfA). A comprehensive assessment of its linearity, precision, accuracy, and robustness has demonstrated its compliance with FDA standards. Integration with Nucleic Acid-Based Amplification (NASBA) has showcased its selectivity for InfA, enabling the detection of InfA RNA with a standard heater set at 41 °C. This platform offers a straightforward setup well-suited for use at low-resource facilities.
Collapse
Affiliation(s)
- Julio Ojeda
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | | | - Nicholas Bruno
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | - Hannah Eastwood
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | - Yulia Gerasimova
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
| | | |
Collapse
|
3
|
Foguel MV, Zamora V, Ojeda J, Reed M, Bennett A, Calvo-Marzal P, Gerasimova YV, Kolpashchikov D, Chumbimuni-Torres KY. DNA nanotechnology for nucleic acid analysis: sensing of nucleic acids with DNA junction-probes. Analyst 2024; 149:968-974. [PMID: 38197474 DOI: 10.1039/d3an01707a] [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] [Indexed: 01/11/2024]
Abstract
DNA nanotechnology deals with the design of non-naturally occurring DNA nanostructures that can be used in biotechnology, medicine, and diagnostics. In this study, we introduced a nucleic acid five-way junction (5WJ) structure for direct electrochemical analysis of full-length biological RNAs. To the best of our knowledge, this is the first report on the interrogation of such long nucleic acid sequences by hybridization probes attached to a solid support. A hairpin-shaped electrode-bound oligonucleotide hybridizes with three adaptor strands, one of which is labeled with methylene blue (MB). The four strands are combined into a 5WJ structure only in the presence of specific DNA or RNA analytes. Upon interrogation of a full-size 16S rRNA in the total RNA sample, the electrode-bound MB-labeled 5WJ association produces a higher signal-to-noise ratio than electrochemical nucleic acid biosensors of alternative design. This advantage was attributed to the favorable geometry on the 5WJ nanostructure formed on the electrode's surface. The 5WJ biosensor is a cost-efficient alternative to the traditional electrochemical biosensors for the analysis of nucleic acids due to the universal nature of both the electrode-bound and MB-labeled DNA components.
Collapse
Affiliation(s)
- Marcos V Foguel
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| | - Victor Zamora
- Escuela Professional de Quimica, Facultad de Ciencias, Universidad Nacional Ingenieria, Av. Tupac 210, Lima, Peru
| | - Julio Ojeda
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| | - Mark Reed
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| | - Alexander Bennett
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| | - Percy Calvo-Marzal
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| | - Yulia V Gerasimova
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| | - Dmitry Kolpashchikov
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
- Burnett School of Biomedical Science, university of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA
| | - Karin Y Chumbimuni-Torres
- Department of Chemistry. University of Central Florida, 4000 Central Florida Boulevard, Orlando, Fl 32816, USA.
| |
Collapse
|
4
|
Murray A, Ojeda J, El Merhebi O, Calvo-Marzal P, Gerasimova Y, Chumbimuni-Torres K. Cost-Effective Modular Biosensor for SARS-CoV-2 and Influenza A Detection. Biosensors (Basel) 2023; 13:874. [PMID: 37754108 PMCID: PMC10526333 DOI: 10.3390/bios13090874] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/03/2023] [Accepted: 09/05/2023] [Indexed: 09/28/2023]
Abstract
A modular, multi-purpose, and cost-effective electrochemical biosensor based on a five-stranded four-way junction (5S-4WJ) system was developed for SARS-CoV-2 (genes S and N) and Influenza A virus (gene M) detection. The 5S-4WJ structure consists of an electrode-immobilized universal stem-loop (USL) strand, two auxiliary DNA strands, and a universal methylene blue redox strand (UMeB). This design allows for the detection of specific nucleic acid sequences using square wave voltammetry (SWV). The sequence-specific auxiliary DNA strands (m and f) ensure selectivity of the biosensor for target recognition utilizing the same USL and UMeB components. An important feature of this biosensor is the ability to reuse the USL-modified electrodes to detect the same or alternative targets in new samples. This is accomplished by a simple procedure involving rinsing the electrodes with water to disrupt the 5S-4WJ structure and subsequent re-hybridization of the USL strand with the appropriate set of strands for a new analysis. The biosensor exhibited minimal loss in signal after rehybridization, demonstrating its potential as a viable multiplex assay for both current and future pathogens, with a low limit of quantification (LOQ) of as low as 17 pM.
Collapse
Affiliation(s)
| | | | | | | | | | - Karin Chumbimuni-Torres
- Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA; (A.M.); (J.O.); (O.E.M.); (P.C.-M.); (Y.G.)
| |
Collapse
|
5
|
Carrera-Cañas C, Del Río-Villegas R, Ojeda J, Callejo M, Garzón M, De Andrés I. Reliability of a Competitive Enzyme-linked Immunosorbent Assay (ELISA) in Detection of Narcolepsy. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.446] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Sanchez R, Servin M, Ojeda J, Maldonado J, Alvarez A, Gutierrez H, Espinoza A. Water use optimization for two commercial maize hybrids
for forage production in semi-arid environment. J Anim Feed Sci 2022. [DOI: 10.22358/jafs/146841/2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
Longetti L, Barillot TR, Puppin M, Ojeda J, Poletto L, van Mourik F, Arrell CA, Chergui M. Ultrafast photoelectron spectroscopy of photoexcited aqueous ferrioxalate. Phys Chem Chem Phys 2021; 23:25308-25316. [PMID: 34747432 DOI: 10.1039/d1cp02872c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photochemistry of metal-organic compounds in solution is determined by both intra- and inter-molecular relaxation processes after photoexcitation. Understanding its prime mechanisms is crucial to optimise the reactive paths and control their outcome. Here we investigate the photoinduced dynamics of aqueous ferrioxalate ([FeIII(C2O4)3]3-) upon 263 nm excitation using ultrafast liquid phase photoelectron spectroscopy (PES). The initial step is found to be a ligand-to-metal electron transfer, occuring on a time scale faster than our time resolution (≲30 fs). Furthermore, we observe that about 25% of the initially formed ferrous species population are lost in ∼2 ps. Cast in the contest of previous ultrafast infrared and X-ray spectroscopic studies, we suggest that upon prompt photoreduction of the metal centre, the excited molecules dissociate in <140 fs into the pair of CO2 and [(CO2)FeII(C2O4)2]3- fragments, with unity quantum yield. About 25% of these pairs geminately recombine in ∼2 ps, due to interaction with the solvent molecules, reforming the ground state of the parent ferric molecule.
Collapse
Affiliation(s)
- L Longetti
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - T R Barillot
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - M Puppin
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - J Ojeda
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - L Poletto
- National Research Council of Italy - Institute of Photonics and Nanotechnologies (CNR-IFN), via Trasea 7, 35131 Padova, Italy
| | - F van Mourik
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - C A Arrell
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - M Chergui
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| |
Collapse
|
8
|
Dhingra MS, Namazova-Baranova L, Arredondo-Garcia JL, Kim KH, Limkittikul K, Jantarabenjakul W, Perminova O, Kobashi IAR, Bae CW, Ojeda J, Park J, Chansinghakul D, B'Chir S, Neveu D, Bonaparte M, Jordanov E. Immunogenicity and safety of a quadrivalent meningococcal tetanus toxoid-conjugate vaccine administered concomitantly with other paediatric vaccines in toddlers: a phase III randomised study. Epidemiol Infect 2021; 149:e90. [PMID: 33814028 PMCID: PMC8080229 DOI: 10.1017/s0950268821000698] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/05/2021] [Accepted: 03/17/2021] [Indexed: 11/07/2022] Open
Abstract
Invasive meningococcal disease has high morbidity and mortality, with infants and young children among those at greatest risk. This phase III, open-label, randomised study in toddlers aged 12-23 months evaluated the immunogenicity and safety of meningococcal tetanus toxoid-conjugate vaccine (MenACYW-TT), a tetanus toxoid conjugated vaccine against meningococcal serogroups A, C, W and Y, when coadministered with paediatric vaccines (measles, mumps and rubella [MMR]; varicella [V]; 6-in-1 combination vaccine against diphtheria, tetanus, pertussis, polio, hepatitis B and Haemophilus influenzae type b [DTaP-IPV-HepB-Hib] and pneumococcal conjugate vaccine [PCV13])(NCT03205371). Immunogenicity to each meningococcal serogroup was assessed by serum bactericidal antibody assay using human complement (hSBA). Vaccine safety profiles were described up to 30 days post-vaccination. A total of 1183 participants were enrolled. The proportion with seroprotection (hSBA ≥1:8) to each meningococcal serogroup at Day 30 was comparable between the MenACYW-TT and MenACYW-TT + MMR + V groups (≥92 and ≥96%, respectively), between the MenACYW-TT and MenACYW-TT + DTaP-IPV-HepB-Hib groups (≥90% for both) and between the MenACYW-TT and MenACYW-TT + PCV13 groups (≥91 and ≥84%, respectively). The safety profiles of MenACYW-TT, and MMR + V, DTaP-IPV-HepB-Hib, and PCV13, with or without MenACYW-TT, were generally comparable. Coadministration of MenACYW-TT with paediatric vaccines in toddlers had no clinically relevant effect on the immunogenicity and safety of any of the vaccines.
Collapse
Affiliation(s)
- M. S. Dhingra
- Global Clinical Sciences, Sanofi Pasteur, Swiftwater, PA, USA
| | - L. Namazova-Baranova
- Institute of Pediatrics, Central Clinical Hospital of the Russian Academy of Science, Moscow, Russia
| | | | - K.-H. Kim
- Department of Pediatrics, Ewha Woman's University College of Medicine, Seoul, South Korea
| | - K. Limkittikul
- Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - W. Jantarabenjakul
- Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - O. Perminova
- City Children Clinical Outpatient Hospital #5, Perm, Russia
| | | | - C.-W. Bae
- Kyung Hee University Hospital at Gangdong, Seoul, Korea
| | - J. Ojeda
- Global Clinical Sciences, Sanofi Pasteur, Mexico City, Mexico
| | - J. Park
- Global Clinical Sciences, Sanofi Pasteur, Singapore, Singapore
| | | | - S. B'Chir
- Global Biostatistical Sciences, Sanofi Pasteur, Marcy l'Etoile, France
| | - D. Neveu
- Global Pharmacovigilance, Sanofi Pasteur, Swiftwater, PA, USA
| | - M. Bonaparte
- Global Clinical Immunology, Sanofi Pasteur, Swiftwater, PA, USA
| | - E. Jordanov
- Global Clinical Sciences, Sanofi Pasteur, Swiftwater, PA, USA
| |
Collapse
|
9
|
Aranda-Aguirre A, Ojeda J, Ferreira de Brito J, Garcia-Segura S, Boldrin Zanoni MV, Alarcon H. Photoelectrodes of Cu2O with interfacial structure of topological insulator Bi2Se3 contributes to selective photoelectrocatalytic reduction of CO2 towards methanol. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.101154] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Longetti L, Randulová M, Ojeda J, Mewes L, Miseikis L, Grilj J, Sanchez-Gonzalez A, Witting T, Siegel T, Diveki Z, van Mourik F, Chapman R, Cacho C, Yap S, Tisch JWG, Springate E, Marangos JP, Slavíček P, Arrell CA, Chergui M. Photoemission from non-polar aromatic molecules in the gas and liquid phase. Phys Chem Chem Phys 2020; 22:3965-3974. [PMID: 32022040 DOI: 10.1039/c9cp06799j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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
The photoelectron spectra of both liquid and gas phase aromatic molecules are reported. The spectra were obtained using a 34.1 eV source produced by high harmonic generation and analysed with the help of high-level ab initio simulations using the reflection principle combined with path integral molecular dynamics simulations accounting for nuclear quantum effects for the gas phase. We demonstrate the suitability of three trimethylbenzenes (1,3,5-trimethylbenzene, 1,2,3-trimethylbenzene and 1,2,4-trimethylbenzene) as a solvent for liquid photoelectron spectroscopy of solute species. We also discuss the electrokinetic charging of a non-polar liquid jet.
Collapse
Affiliation(s)
- L Longetti
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - M Randulová
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, Prague 6, 166 28, Czech Republic
| | - J Ojeda
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - L Mewes
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - L Miseikis
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - J Grilj
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - A Sanchez-Gonzalez
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - T Witting
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - T Siegel
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - Z Diveki
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - F van Mourik
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| | - R Chapman
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, UK
| | - C Cacho
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, UK
| | - S Yap
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, UK
| | - J W G Tisch
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - E Springate
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, UK
| | - J P Marangos
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, UK
| | - P Slavíček
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, Prague 6, 166 28, Czech Republic
| | - C A Arrell
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland. and Laboratory for Advanced Photonics, Paul Scherrer Institut, Villigen, 5232, Switzerland.
| | - M Chergui
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
| |
Collapse
|
11
|
Martín-Sosa E, Martínez-Reina J, Mayo J, Ojeda J. Influence of musculotendon geometry variability in muscle forces and hip bone-on-bone forces during walking. PLoS One 2019; 14:e0222491. [PMID: 31553756 PMCID: PMC6760798 DOI: 10.1371/journal.pone.0222491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 08/23/2019] [Indexed: 11/19/2022] Open
Abstract
Inverse dynamics problems are usually solved in the analysis of human gait to obtain reaction forces and moments at the joints. However, these actions are not the actual forces and moments supported by the joint structure, because they do not consider the forces of the muscles acting across the joint. Therefore, to analyse bone-on bone forces it is necessary to estimate those muscle forces. Usually, this problem is addressed by means of optimization algorithms. One of the parameters required to solve this problem is the musculotendon geometry. These data are usually taken from cadavers or MRI data from several subjects, different from the analysed subject. Then, the model is scaled to the subject morphology. This procedure constitutes a source of error. The goals of this work were two. First, to perform a sensitivity analysis of the influence of muscle insertion locations on the muscle forces acting on the hip joint and on the hip joint bone-on-bone forces. Second, to compare the hip joint bone-on-bone forces during gait cycle obtained through muscle insertion locations taken from a musculoskeletal model template and a scaling procedure to those obtained from a subject-specific model using an MRI of the subject. The problem was solved using OpenSim. Results showed that anatomical variability should be analysed from two perspectives. One the one hand, throughout the gait cycle, in a global way. On the other hand, at a characteristic instant of the gait cycle. Variations of ±1 cm in the position of the attachment points of certain muscles caused variations of up to 14.21% in averaged deviation of the muscle forces and 58.96% in the peak force in the modified muscle and variations up to 57.23% in the averaged deviation of the muscle force and up to 117.23% in the peak force in the rest of muscles. Then, the influence of that variability on muscle activity patterns and hip bone-on-bone forces could be described more precisely. A biomechanical analysis of a subject-specific musculoskeletal model was carried out. Using MRI data, variations up to 5 cm in the location of the insertion points were introduced. These modifications showed significant differences between the baseline model and the customized model: within the range [-12%, 10%] for muscle forces and around 35% of body weight for hip bone-on-bone forces.
Collapse
Affiliation(s)
- E. Martín-Sosa
- Departamento de Ingeniería Mecánica y Fabricación, Universidad de Sevilla, Seville, Spain
| | - J. Martínez-Reina
- Departamento de Ingeniería Mecánica y Fabricación, Universidad de Sevilla, Seville, Spain
| | - J. Mayo
- Departamento de Ingeniería Mecánica y Fabricación, Universidad de Sevilla, Seville, Spain
| | - J. Ojeda
- Departamento de Ingeniería Mecánica y Fabricación, Universidad de Sevilla, Seville, Spain
- * E-mail:
| |
Collapse
|
12
|
Villanueva V, Gómez A, Garcés M, Bermejo P, Montoya J, Toledo M, López-González FJ, Rodriguez X, Campos D, Martínez P, Giner P, Zurita J, Rodríguez-Uranga J, Ojeda J, Mauri JA, Ruiz-Giménez J, Poza JJ, Massot A, Bonet M. PO042 Early-esli study: from early add-on to monotherapy with eslicarbazepine acetate. J Neurol Psychiatry 2017. [DOI: 10.1136/jnnp-2017-abn.75] [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] [Indexed: 11/03/2022]
|
13
|
Villanueva V, Bermejo P, Montoya J, Toledo M, Gómez-Ibáñez A, Garcés M, Vilella L, López-González FJ, Rodriguez-Osorio X, Campos D, Martínez P, Giner P, Zurita J, Rodríguez-Uranga J, Ojeda J, Mauri JA, Camacho JL, Ruiz-Giménez J, Poza JJ, Massot-Tarrús A, Galiano ML, Bonet M. EARLY-ESLI study: Long-term experience with eslicarbazepine acetate after first monotherapy failure. Acta Neurol Scand 2017; 136:254-264. [PMID: 27935017 DOI: 10.1111/ane.12720] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2016] [Indexed: 02/01/2023]
Abstract
PURPOSE Evaluate real-life experience with eslicarbazepine acetate (ESL) after first monotherapy failure in a large series of patients with focal epilepsy. METHOD Multicentre, retrospective, 1-year, observational study in patients older than 18 years, with focal epilepsy, who had failed first antiepileptic drug monotherapy and who received ESL. Data from clinical records were analysed at baseline, 3, 6 and 12 months to assess effectiveness and tolerability. RESULTS Eslicarbazepine acetate was initiated in 253 patients. The 1-year retention rate was 92.9%, and the final median dose of ESL was 800 mg. At 12 months, 62.3% of patients had been seizure free for 6 months; 37.3% had been seizure free for 1 year. During follow-up, 31.6% of the patients reported ESL-related adverse events (AEs), most commonly somnolence (8.7%) and dizziness (5.1%), and 3.6% discontinued due to AEs. Hyponatraemia was observed in seven patients (2.8%). After starting ESL, 137 patients (54.2%) withdrew the prior monotherapy and converted to ESL monotherapy; 75.9% were seizure free, 87.6% were responders, 4.4% worsened, and 23.4% reported ESL-related AEs. CONCLUSION Use of ESL after first monotherapy failure was associated with an optimal seizure control and tolerability profile. Over half of patients were converted to ESL monotherapy during follow-up.
Collapse
Affiliation(s)
- V. Villanueva
- Hospital Universitario y Politécnico La Fe; Valencia Spain
| | - P. Bermejo
- Hospital Universitario Puerta Hierro; Madrid Spain
| | | | - M. Toledo
- Hospital Universitario Vall d′Hebron; Barcelona Spain
| | | | - M. Garcés
- Hospital Universitario y Politécnico La Fe; Valencia Spain
| | - L. Vilella
- Hospital Universitario Vall d′Hebron; Barcelona Spain
| | | | | | - D. Campos
- Hospital Clínico Universitario; Valladolid Spain
| | - P. Martínez
- Hospital Universitario Virgen del Rocio; Sevilla Spain
| | - P. Giner
- Hospital Universitario Dr. Peset; Valencia Spain
| | - J. Zurita
- Hospital Universitario Infanta Leonor; Madrid Spain
| | - J. Rodríguez-Uranga
- Clínica Sagrado Corazón; Instituto de Especialidades Neurológicas; Sevilla Spain
| | - J. Ojeda
- Hospital Universitario Infanta Sofía; Madrid Spain
| | - J. A. Mauri
- Hospital Clinico Universitario Lozano Blesa; Zaragoza Spain
| | - J. L. Camacho
- Hospital Clinico Universitario Lozano Blesa; Zaragoza Spain
| | | | - J. J. Poza
- Hospital Universitario Donosti; San Sebastian Spain
| | | | - M. L. Galiano
- Hospital Universitario Gregorio Marañon; Madrid Spain
| | - M. Bonet
- Hospital Arnau de Vilanova; Valencia Spain
| |
Collapse
|
14
|
Nazzal C, Alonso F, Ojeda J, Cerecera F. P4432Younger women are more affected by seasonality in acute myocardial infarction admission than men: Chile, 2002-2011. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4432] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
15
|
Villanueva V, Garcés M, López-González FJ, Rodriguez-Osorio X, Toledo M, Salas-Puig J, González-Cuevas M, Campos D, Serratosa JM, González-Giráldez B, Mauri JA, Camacho JL, Suller A, Carreño M, Gómez JB, Montoya J, Rodríguez-Uranga J, Saiz-Diaz R, González-de la Aleja J, Castillo A, López-Trigo J, Poza JJ, Flores J, Querol R, Ojeda J, Giner P, Molins A, Esteve P, Baigesr JJ. Erratum to "Safety, efficacy and outcome-related factors of perampanel over 12months in a real-world setting: The FYDATA study" [Epilepsy Res. 126 (2016) 201-210]. Epilepsy Res 2016; 129:174-175. [PMID: 28017504 DOI: 10.1016/j.eplepsyres.2016.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- V Villanueva
- Hospital Universitario y Politécnico La Fe, Valencia, Spain.
| | - M Garcés
- Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | | | | | - M Toledo
- Hospital Universitario Vall d'Hebron, Barcelona, Spain
| | - J Salas-Puig
- Hospital Universitario Vall d'Hebron, Barcelona, Spain
| | | | - D Campos
- Hospital Clínico Universitario, Valladolid, Spain
| | | | | | - J A Mauri
- Hospital Clínico Universitario, Zaragoza, Spain
| | - J L Camacho
- Hospital Clínico Universitario, Zaragoza, Spain
| | - A Suller
- Hospital Clínico Universitario, Zaragoza, Spain
| | - M Carreño
- Hospital Clinic Universitari, Barcelona, Spain
| | - J B Gómez
- Hospital Clinic Universitari, Barcelona, Spain
| | - J Montoya
- Hospital Lluis Alcanyis, Xátiva, Spain
| | | | - R Saiz-Diaz
- Hospital Universitario 12 de Octubre, Madrid, Spain
| | | | - A Castillo
- Consorcio Hospital General Universitario, Valencia, Spain
| | - J López-Trigo
- Consorcio Hospital General Universitario, Valencia, Spain
| | - J J Poza
- Hospital Universitario Donosti, Spain
| | - J Flores
- Hospital Nuestra Sẽnora Candelaria, Tenerife, Spain
| | - R Querol
- Hospital Universitario Infanta Cristina, Badajoz, Spain
| | - J Ojeda
- Hospital Universitario Infanta Sofia, Madrid, Spain
| | - P Giner
- Hospital Universitario Dr Peset, Valencia, Spain
| | - A Molins
- Hospital Universitario Josep Trueta, Girona, Spain
| | - P Esteve
- Hospital Verge de la Cinta, Tortosa, Spain
| | - J J Baigesr
- Hospital Universitario y Politécnico La Fe, Valencia, Spain
| |
Collapse
|
16
|
Carvajal P, Dinamarca MA, Baeza P, Camú E, Ojeda J. Removal of sulfur-containing organic molecules adsorbed on inorganic supports by Rhodococcus Rhodochrous spp. Biotechnol Lett 2016; 39:241-245. [PMID: 27766485 DOI: 10.1007/s10529-016-2240-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 08/30/2016] [Accepted: 10/12/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To remove dibenzothiophene (DBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT) adsorbed on alumina, silica and sepiolite through biodesulfurization (BDS) using Rhodococcus Rhodochrous spp., that selectively reduce sulfur molecules without generating of gaseous pollutants. RESULTS The adsorption of DBT and 4,6-DMDBT was affected by the properties of the supports, including particle size and the presence of surface acidic groups. The highest adsorption of both sulfur-containing organic molecules used particle sizes of 0.43-0.063 mm. The highest percentage removal was with sepiolite (80 % for DBT and 56 % for 4,6-DMDBT) and silica (71 % for DBT and 37 % for 4,6-DMDBT). This is attributed to the close interaction between these supports and the bacteria. CONCLUSIONS Biodesulfurization is effective for removing the sulfur-containing organic molecules adsorbed on inorganic materials and avoids the generation of gaseous pollutants.
Collapse
Affiliation(s)
- P Carvajal
- Laboratorio de Biotecnología Microbiana, Escuela de Nutrición, Facultad de Farmacia, Universidad de Valparaíso, Casilla 5001, Valparaíso, Chile
| | - M Alejandro Dinamarca
- Centro de MicroBioinnovación, Universidad de Valparaíso, Casilla 5001, Valparaíso, Chile
| | - P Baeza
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Casilla 4059, Valparaíso, Chile
| | - E Camú
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Casilla 4059, Valparaíso, Chile
| | - J Ojeda
- Centro de MicroBioinnovación, Universidad de Valparaíso, Casilla 5001, Valparaíso, Chile.
| |
Collapse
|
17
|
Villanueva V, Garcés M, López-González F, Rodriguez-Osorio X, Toledo M, Salas-Puig J, González-Cuevas M, Campos D, Serratosa J, González-Giráldez B, Mauri J, Camacho J, Suller A, Carreño M, Gómez J, Montoya J, Rodríguez-Uranga J, Saiz-Diaz R, González-de la Aleja J, Castillo A, López-Trigo J, Poza J, Flores J, Querol R, Ojeda J, Giner P, Molins A, Esteve P, Baiges J. Safety, efficacy and outcome-related factors of perampanel over 12 months in a real-world setting: The FYDATA study. Epilepsy Res 2016; 126:201-10. [DOI: 10.1016/j.eplepsyres.2016.08.001] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 07/18/2016] [Accepted: 08/03/2016] [Indexed: 01/05/2023]
|
18
|
Arrell CA, Ojeda J, Mewes L, Grilj J, Frassetto F, Poletto L, van Mourik F, Chergui M. Laser-Assisted Photoelectric Effect from Liquids. Phys Rev Lett 2016; 117:143001. [PMID: 27740777 DOI: 10.1103/physrevlett.117.143001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Indexed: 06/06/2023]
Abstract
The laser-assisted photoelectric effect from liquid surfaces is reported for the first time. Photoelectrons generated by 35.6 eV radiation from a liquid microjet of water under vacuum are dressed with a ℏω=1.55 eV laser field. The subsequent redistribution of the photoelectron energies consists in the appearance of sidebands shifted by energies equivalent to ℏω, 2ℏω, and 3ℏω. The response has been modeled to the third order and combined with energy-resolved measurements. This result opens the possibility to investigate the dynamics at surfaces of liquid solutions and provide information about the electron emission process from a liquid.
Collapse
Affiliation(s)
- C A Arrell
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - J Ojeda
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - L Mewes
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - J Grilj
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - F Frassetto
- National Research Council of Italy-Institute of Photonics and Nanotechnologies (CNR-IFN), via Trasea 7, 35131 Padova, Italy
| | - L Poletto
- National Research Council of Italy-Institute of Photonics and Nanotechnologies (CNR-IFN), via Trasea 7, 35131 Padova, Italy
| | - F van Mourik
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - M Chergui
- Laboratory of Ultrafast Spectroscopy and the Lausanne Centre for Ultrafast Science, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| |
Collapse
|
19
|
Ojeda J, Arrell CA, Grilj J, Frassetto F, Mewes L, Zhang H, van Mourik F, Poletto L, Chergui M. Harmonium: A pulse preserving source of monochromatic extreme ultraviolet (30-110 eV) radiation for ultrafast photoelectron spectroscopy of liquids. Struct Dyn 2016; 3:023602. [PMID: 26798833 PMCID: PMC4711517 DOI: 10.1063/1.4933008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/28/2015] [Indexed: 05/19/2023]
Abstract
A tuneable repetition rate extreme ultraviolet source (Harmonium) for time resolved photoelectron spectroscopy of liquids is presented. High harmonic generation produces 30-110 eV photons, with fluxes ranging from ∼2 × 10(11) photons/s at 36 eV to ∼2 × 10(8) photons/s at 100 eV. Four different gratings in a time-preserving grating monochromator provide either high energy resolution (0.2 eV) or high temporal resolution (40 fs) between 30 and 110 eV. Laser assisted photoemission was used to measure the temporal response of the system. Vibrational progressions in gas phase water were measured demonstrating the ∼0.2 eV energy resolution.
Collapse
Affiliation(s)
- J Ojeda
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - C A Arrell
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - J Grilj
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - F Frassetto
- National Research Council of Italy - Institute of Photonics and Nanotechnologies (CNR-IFN) , via Trasea 7, 35131 Padova, Italy
| | - L Mewes
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - H Zhang
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - F van Mourik
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - L Poletto
- National Research Council of Italy - Institute of Photonics and Nanotechnologies (CNR-IFN) , via Trasea 7, 35131 Padova, Italy
| | - M Chergui
- Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS) , Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| |
Collapse
|
20
|
Ramírez E, Martín A, Lorente M, Vara C, Ojeda J, Moro M, Gómez R, Asensio M, Orduña M, Frías J. A Computerized System for Reporting and Analysis of Incidents, Errors or Adverse Events: Results Of 2014. Clin Ther 2015. [DOI: 10.1016/j.clinthera.2015.05.391] [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] [Indexed: 10/23/2022]
|
21
|
Al Haddad A, Chauvet A, Ojeda J, Arrell C, van Mourik F, Auböck G, Chergui M. Set-up for broadband Fourier-transform multidimensional electronic spectroscopy. Opt Lett 2015; 40:312-315. [PMID: 25680035 DOI: 10.1364/ol.40.000312] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a compact passively phase-stabilized ultra-broadband 2D Fourier transform setup. A gas (argon)-filled hollow core fiber pumped by an amplified Ti:Al2O3 laser is used as a light source providing spectral range spanning from 420 to 900 nm. Sub-10-fs pulses were obtained using a deformable mirror-based pulse shaper. We probe the nonlinear response of Rhodamine 101 using 90 nm bandwidth and resolve vibrational coherences of 150 fs period in the ground state.
Collapse
|
22
|
Arrell CA, Ojeda J, Sabbar M, Okell WA, Witting T, Siegel T, Diveki Z, Hutchinson S, Gallmann L, Keller U, van Mourik F, Chapman RT, Cacho C, Rodrigues N, Turcu ICE, Tisch JWG, Springate E, Marangos JP, Chergui M. A simple electron time-of-flight spectrometer for ultrafast vacuum ultraviolet photoelectron spectroscopy of liquid solutions. Rev Sci Instrum 2014; 85:103117. [PMID: 25362381 DOI: 10.1063/1.4899062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We present a simple electron time of flight spectrometer for time resolved photoelectron spectroscopy of liquid samples using a vacuum ultraviolet (VUV) source produced by high-harmonic generation. The field free spectrometer coupled with the time-preserving monochromator for the VUV at the Artemis facility of the Rutherford Appleton Laboratory achieves an energy resolution of 0.65 eV at 40 eV with a sub 100 fs temporal resolution. A key feature of the design is a differentially pumped drift tube allowing a microliquid jet to be aligned and started at ambient atmosphere while preserving a pressure of 10(-1) mbar at the micro channel plate detector. The pumping requirements for photoelectron (PE) spectroscopy in vacuum are presented, while the instrument performance is demonstrated with PE spectra of salt solutions in water. The capability of the instrument for time resolved measurements is demonstrated by observing the ultrafast (50 fs) vibrational excitation of water leading to temporary proton transfer.
Collapse
Affiliation(s)
- C A Arrell
- Laboratory of Ultrafast Spectroscopy, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - J Ojeda
- Laboratory of Ultrafast Spectroscopy, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - M Sabbar
- Physics Department, ETH Zurich, 8093 Zurich, Switzerland
| | - W A Okell
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - T Witting
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - T Siegel
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - Z Diveki
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - S Hutchinson
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - L Gallmann
- Physics Department, ETH Zurich, 8093 Zurich, Switzerland
| | - U Keller
- Physics Department, ETH Zurich, 8093 Zurich, Switzerland
| | - F van Mourik
- Laboratory of Ultrafast Spectroscopy, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - R T Chapman
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, United Kingdom
| | - C Cacho
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, United Kingdom
| | - N Rodrigues
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, United Kingdom
| | - I C E Turcu
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, United Kingdom
| | - J W G Tisch
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - E Springate
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Oxon OX11 0QX, United Kingdom
| | - J P Marangos
- Department of Physics, The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom
| | - M Chergui
- Laboratory of Ultrafast Spectroscopy, ISIC, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| |
Collapse
|
23
|
Ibacache-Quiroga C, Ojeda J, Espinoza-Vergara G, Olivero P, Cuellar M, Dinamarca MA. The hydrocarbon-degrading marine bacterium Cobetia sp. strain MM1IDA2H-1 produces a biosurfactant that interferes with quorum sensing of fish pathogens by signal hijacking. Microb Biotechnol 2013; 6:394-405. [PMID: 23279885 PMCID: PMC3917474 DOI: 10.1111/1751-7915.12016] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [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: 10/23/2012] [Revised: 11/12/2012] [Accepted: 11/14/2012] [Indexed: 11/27/2022] Open
Abstract
Biosurfactants are produced by hydrocarbon-degrading marine bacteria in response to the presence of water-insoluble hydrocarbons. This is believed to facilitate the uptake of hydrocarbons by bacteria. However, these diffusible amphiphilic surface-active molecules are involved in several other biological functions such as microbial competition and intra-or inter-species communication. We report the isolation and characterization of a marine bacterial strain identified as Cobetia sp. MM1IDA2H-1, which can grow using the sulfur-containing heterocyclic aromatic hydrocarbon dibenzothiophene (DBT). As with DBT, when the isolated strain is grown in the presence of a microbial competitor, it produces a biosurfactant. Because the obtained biosurfactant was formed by hydroxy fatty acids and extracellular lipidic structures were observed during bacterial growth, we investigated whether the biosurfactant at its critical micelle concentration can interfere with bacterial communication systems such as quorum sensing. We focused on Aeromonas salmonicida subsp. salmonicida, a fish pathogen whose virulence relies on quorum sensing signals. Using biosensors for quorum sensing based on Chromobacterium violaceum and Vibrio anguillarum, we showed that when the purified biosurfactant was mixed with N-acyl homoserine lactones produced by A. salmonicida, quorum sensing was inhibited, although bacterial growth was not affected. In addition, the transcriptional activities of A. salmonicida virulence genes that are controlled by quorum sensing were repressed by both the purified biosurfactant and the growth in the presence of Cobetia sp. MM1IDA2H-1. We propose that the biosurfactant, or the lipid structures interact with the N-acyl homoserine lactones, inhibiting their function. This could be used as a strategy to interfere with the quorum sensing systems of bacterial fish pathogens, which represents an attractive alternative to classical antimicrobial therapies in fish aquaculture.
Collapse
Affiliation(s)
- C Ibacache-Quiroga
- Laboratorio de Biotecnología Microbiana, Universidad de Valparaíso, Valparaíso, Chile
| | | | | | | | | | | |
Collapse
|
24
|
Ojeda J, Martínez-Reina J, Mayo J. A NEW METHOD TO ESTIMATE SUBJECT-SPECIFIC MUSCLE PARAMETERS. J Biomech 2012. [DOI: 10.1016/s0021-9290(12)70496-7] [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] [Indexed: 10/28/2022]
|
25
|
Ojeda J, Martínez-Reina J, Mayo J. STUDY, OPTIMIZATION OF PARAMETERS AND VALIDATION OF THE BEHAVIOR OF A WHOLE HUMAN FEMUR DURING NORMAL GAIT. J Biomech 2012. [DOI: 10.1016/s0021-9290(12)70118-5] [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] [Indexed: 10/28/2022]
|
26
|
Ojeda J, Martínez-Reina J, García-Aznar JM, Domínguez J, Doblaré M. Numerical simulation of bone remodelling around dental implants. Proc Inst Mech Eng H 2011; 225:897-906. [PMID: 22070027 DOI: 10.1177/0954411911410165] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Crestal bone loss can result in the failure of dental implants and can be caused, by among other factors, the development of non-physiological mechanical conditions. Bone remodelling (BR) is the physiological process through which bone adapts itself to the mechanical environment. A previously published mathematical model of BR is used in this work to study the homogenized structural evolution of peri-implant bone. This model is used to study the influence of the diameter and length of a dental implant of pure titanium on its long-term stability. The temporal evolution of porosity and microstructural damage of the peri-implant bone are the variables analysed in this study. The results show that damage and porosity increase as the implant length decreases and, more pronouncedly, as its diameter decreases. The increase in damage and porosity levels is localized, as many other studies confirm, at the implant neck due to the stress concentration that is created in that area. The main conclusion of this study is that in implants with a diameter equal to or greater than 3 mm the damage is under control and there is no mechanical failure of the peri-implant bone in the long term.
Collapse
Affiliation(s)
- J Ojeda
- Department of Mechanical Engineering, University of Seville, Seville, Spain.
| | | | | | | | | |
Collapse
|
27
|
Dinamarca MA, Ibacache-Quiroga C, Baeza P, Galvez S, Villarroel M, Olivero P, Ojeda J. Biodesulfurization of gas oil using inorganic supports biomodified with metabolically active cells immobilized by adsorption. Bioresour Technol 2010; 101:2375-8. [PMID: 20034786 DOI: 10.1016/j.biortech.2009.11.086] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2009] [Revised: 11/18/2009] [Accepted: 11/19/2009] [Indexed: 05/23/2023]
Abstract
The immobilization of Pseudomonas stutzeri using adsorption on different inorganic supports was studied in relation to the number of adsorbed cells, metabolic activity and biodesulfurization (BDS). The electrophoretic migration (EM) measurements and Tetrazolioum (TTC) method were used to evaluate adsorption and metabolic activity. Results indicate that maximal immobilization was obtained with an initial load of 14 x 10(8) cells mL(-1) for Al and Sep, whereas Ti requires 20 x 10(8) cells mL(-1). The highest interaction was observed in the P. stutzeri/Si and P. stutzeri/Sep biocatalysts. The IEP values and metabolic activities indicate that P. stutzeri change the surface of supports and maintains metabolic activity. A direct relation between BDS activity and the adsorption capacity of the bacterial cells was observed at the adsorption/desorption equilibrium level. The biomodification of inorganic supports by the adsorption process increases the bioavailability of sulphur substrates for bacterial cells, improving BDS activity.
Collapse
Affiliation(s)
- M Alejandro Dinamarca
- Laboratorio de Biotecnología Microbiana, Facultad de Farmacia, Universidad de Valparaíso, Casilla 5001, Valparaíso, Chile
| | | | | | | | | | | | | |
Collapse
|
28
|
Miller M, Quintana J, Ojeda J, Langan S, Thorp S, Pozzi E, Sztejnberg M, Estryk G, Nosal R, Saire E, Agrazar H, Graiño F. New irradiation facility for biomedical applications at the RA-3 reactor thermal column. Appl Radiat Isot 2009; 67:S226-9. [PMID: 19406651 DOI: 10.1016/j.apradiso.2009.03.107] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new irradiation facility has been developed in the RA-3 reactor in order to perform trials for the treatment of liver metastases using boron neutron capture therapy (BNCT). RA-3 is a production research reactor that works continuously five days a week. It had a thermal column with a small cross section access tunnel that was not accessible during operation. The objective of the work was to perform the necessary modifications to obtain a facility for irradiating a portion of the human liver. This irradiation facility must be operated without disrupting the normal reactor schedule and requires a highly thermalized neutron spectrum, a thermal flux of around 10(10) n cm(-2)s(-1) that is as isotropic and uniform as possible, as well as on-line instrumentation. The main modifications consist of enlarging the access tunnel inside the thermal column to the suitable dimensions, reducing the gamma dose rate at the irradiation position, and constructing properly shielded entrance gates enabled by logical control to safely irradiate and withdraw samples with the reactor at full power. Activation foils and a neutron shielded graphite ionization chamber were used for a preliminary in-air characterization of the irradiation site. The constructed facility is very practical and easy to use. Operational authorization was obtained from radioprotection personnel after confirming radiation levels did not significantly increase after the modification. A highly thermalized and homogenous irradiation field was obtained. Measurements in the empty cavity showed a thermal flux near 10(10) n cm(-2)s(-1), a cadmium ratio of 4100 for gold foils and a gamma dose rate of approximately 5 Gy h(-1).
Collapse
Affiliation(s)
- M Miller
- Instrumentation and Control Department, National Atomic Energy Commission, Argentina.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
We describe a two-beam thermal lens spectrophotometer that uses a xenon lamp as the excitation source and a low power diode pumped Nd-YAG laser as the probe light. The white light from the xenon source is filtered using a variable interference filter producing a partial monochromatic light within the spectral range 400-700 nm and with a spectral resolution of 10 nm. We measure the thermal lens spectrum of a nonfluorescent dye (Malachite Green) and show that this spectrum reproduces its absorbance spectra measured by the usual transmission method. A comparison of the thermal lens and the absorbance spectra of a fluorescent dye (Rhodamine B) reveals substantial differences. These differences can yield important applications of the device for the characterization of fluorescent materials.
Collapse
Affiliation(s)
- A Marcano O
- Applied Optics Center, Delaware State University, Dover, Delaware 19901, USA.
| | | | | |
Collapse
|
30
|
Ojeda J, Escalona N, Baeza P, Escudey M, Gil-Llambías FJ. Synergy between Mo/SiO2and Co/SiO2beds in HDS: a remote control effect? Chem Commun (Camb) 2003. [DOI: 10.1039/b301647c] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
|
32
|
Schenone H, Burgos M, Ulloa M, Acuña P, Ojeda J, Silva JR, Ibáñez O, Schenone H. [Epizootic outbreaks of trichinosis in 2 pig farms from the Metropolitan Region of Chile]. Bol Chil Parasitol 1999; 54:113-5. [PMID: 10883501] [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: 02/16/2023]
Abstract
In Chile swine trichinosis has presented a progressive decreasing in the last two decades of XX century. T. spiralis pig infection descended from an average of 0.683 per 1000 in 1980-1984 to 0.315 in 1985-1989 and to 0.115 in 1990-1996. In the particular case of Metropolitan Region this decreasing has been more marked: from an average of 0.058 per 1000 in 1990-1994 to 0.003 in 1995-1999. Between the end of June 1999 and middle January 2000 in Metropolitan Region abattoirs T. spiralis was detected in 15 (4.9%) out of 306 swine from two pigsties located in El Monte (E.M.) and Padre Hurtado (P.H.) 45 and 30 km south-west from Santiago. In the same period another four pigs from the same premises were found infected in abattoirs of other regions. During inspection visits it was stated that both pig farms had deficient sanitary conditions. Phototrichinoscopy was positive in three out of five Rattus norvegicus collected in E.M. In pigsty PH the examination of diaphragm samples of 25 dogs and 17 cats resulted negative. In the premises originating T. spirali infected swine the Metropolitan Environmental Health Service Abattoirs Program carries out an epidemiological vigilance consisting in the follow-up of animals destined for slaughtering in order to initiate prophylactic actions oriented to eliminate eventual sources of trichinosis infection for human and rearing pigs.
Collapse
Affiliation(s)
- H Schenone
- Departamento Vigilancia Sanitaria, I.C.B.M. Facultad de Medicina, Universidad de Chile
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Antón J, Sainz C, Pérez E, Moreno L, Ojeda J. [Medullary compression at the C6 level as the first sign of multiple hereditary exostoses]. Rev Clin Esp 1990; 186:88-90. [PMID: 2330442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- J Antón
- Servicio de Medicina Interna B y Radiodiagnóstico, Hospital Clínico Universitario de Valladolid
| | | | | | | | | |
Collapse
|
34
|
|
35
|
Abstract
The surgical technique for a new alternative to urinary diversion is described. The biocarbon conduit is an inert device implanted in the abdominal wall. Its inner end is anastomosed to the distal ureter, and the outlet is over the abdominal skin and connected to a collector tube into a urinary bag. Twenty implants were performed between March, 1980, and July, 1981. Seventeen patients had carcinoma of the uterine cervix, and 3 had carcinoma of the urinary bladder (age range 34 to 79 years). All had severe urinary tract infection, retrodilation, and were in poor general physical condition. Eight fistulas developed in the 20 implants.
Collapse
|