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Giménez-Romero À, Iturbide M, Moralejo E, Gutiérrez JM, Matías MA. Global warming significantly increases the risk of Pierce's disease epidemics in European vineyards. Sci Rep 2024; 14:9648. [PMID: 38671045 DOI: 10.1038/s41598-024-59947-y] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Pierce's disease (PD) is a vector-borne disease caused by the bacteria Xylella fastidiosa, which affects grapevines in the Americas. Currently, vineyards in continental Europe, the world's largest producer of quality wine, have not yet been affected by PD. However, climate change may alter this situation. Here we incorporate the latest regional climate change projections into a climate-driven epidemiological model to assess the risk of PD epidemics in Europe for different levels of global warming. We found a significant increase in risk above + 2 ∘ C in the main wine-producing regions of France, Italy and Portugal, in addition to a critical tipping point above + 3 ∘ C for the possible spread of PD beyond the Mediterranean. The model identifies decreasing risk trends in Spain, as well as contrasting patterns across the continent with different velocities of risk change and epidemic growth rates. Although there is some uncertainty in model projections over time, spatial patterns of risk are consistent across different climate models. Our study provides a comprehensive analysis of the future of PD at multiple spatial scales (country, Protected Designation of Origin and vineyard), revealing where, why and when PD could become a new threat to the European wine industry.
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Affiliation(s)
- Àlex Giménez-Romero
- Instituto de Física Interdisciplinar y Sistemas Complejos (IFISC, CSIC-UIB), Campus UIB, 07122, Palma de Mallorca, Spain
| | - Maialen Iturbide
- Instituto de Física de Cantabria (IFCA, CSIC-University of Cantabria), Avenida de los Castros, 39005, Santander, Spain
| | - Eduardo Moralejo
- Tragsa, Passatge Cala Figuera 6, 07009, Palma de Mallorca, Spain
| | - José M Gutiérrez
- Instituto de Física de Cantabria (IFCA, CSIC-University of Cantabria), Avenida de los Castros, 39005, Santander, Spain
| | - Manuel A Matías
- Instituto de Física Interdisciplinar y Sistemas Complejos (IFISC, CSIC-UIB), Campus UIB, 07122, Palma de Mallorca, Spain.
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2
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Iliyasu G, Gutiérrez JM, Habib AG. Snakebites in children: Also a European occurrence. Toxicon 2023; 236:107346. [PMID: 37951247 DOI: 10.1016/j.toxicon.2023.107346] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 11/09/2023] [Indexed: 11/13/2023]
Affiliation(s)
- Garba Iliyasu
- Department of Medicine, Bayero University Kano, Nigeria.
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, 11501, Costa Rica
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3
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Iliyasu G, Dayyab FM, Michael GC, Hamza M, Habib MA, Gutiérrez JM, Habib AG. Case fatality rate and burden of snakebite envenoming in children - A systematic review and meta-analysis. Toxicon 2023; 234:107299. [PMID: 37739273 DOI: 10.1016/j.toxicon.2023.107299] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 06/04/2023] [Revised: 09/11/2023] [Accepted: 09/19/2023] [Indexed: 09/24/2023]
Abstract
Snakebite is a major public health problem with an estimated global burden of 5 million people per annum. Data on snakebite envenoming in children are very limited and is unclear whether there is a significant difference in severity between adults and children. We therefore conducted a meta-analysis of observational studies on snakebite in children to obtain a more precise estimate of case fatality rate (CFR) as well as to explore the differences in outcome between children and adults. Studies from all over the world reported until the end of February 2023 were included. Analysis was conducted consistent with the Meta-analysis of Observational Studies in Epidemiology (MOOSE) criteria. Estimates were obtained from Random Effects Model (REM). Sub-analysis was conducted for studies from sub-Saharan Africa (SSA) to provide estimates for the continent. Adverse outcomes comprising composite endpoints (CE), defined as fatality and or complications, were compared between children and adults in sub-analysis of studies reporting on both groups. The annual burden and fatality of snakebite envenoming were derived based on lifetime prevalence of bite, meta-analysis estimates, and other data inputs. The pooled estimate of the CFR from 35 studies included worldwide was 1.98% [95%CI:1.38-2.58%] while the estimates from 6 studies within SSA was 2.43% (95%CI:0.67-4.20%). The odds of adverse outcomes were 2.52 times higher in children compared to adults. The estimated annual burden was 178,491 cases with 4346 deaths among children in SSA. These estimates compare favorably to those reported in the literature.
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Affiliation(s)
- Garba Iliyasu
- College of Health Sciences, Bayero University Kano, Kano State, Nigeria.
| | - Farouq M Dayyab
- Department of Infectious Diseases, Mohammad Bin Khalifa Bin Salman Alkhalifa Cardiac Center, Awali, Bahrain
| | - Godpower C Michael
- Department of Family Medicine, Aminu Kano Teaching Hospital, Kano State, Nigeria
| | - Muhammad Hamza
- College of Health Sciences, Bayero University Kano, Kano State, Nigeria
| | | | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, 11501, Costa Rica
| | - Abdulrazaq G Habib
- College of Health Sciences, Bayero University Kano, Kano State, Nigeria.
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León-Núñez LJ, Camero-Ramos G, Gutiérrez JM. Epidemiology of snakebites in Colombia (2008-2016). Rev Salud Publica (Bogota) 2023; 22:280-287. [PMID: 36753152 DOI: 10.15446/rsap.v22n3.87005] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 06/05/2020] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVE To describe the main epidemiological features of snakebites in Colombia during the period 2008 to 2016. METHODS A retrospective (quantitative) descriptive analytical empirical study was carried out, based on the official databases of the Public Health Surveillance in the Integral Information System of the Social Protection (SISPRO) and the Surveillance System in Public Health (Sivigila) of the reported cases of snakebites in Colombia for that period. RESULTS In total, 37 066 cases were reported, with annual incidences ranging from 7.0 (2008) to 9.7 (2011 and 2012) cases per 100,000 population. Mortality rates ranged from 0.059 (2013) to 0.091 (2011) deaths per 100 000 population, with case fatality rates ranging from 0.6% (2013) to 1.0% (2010). Indigenous and Afro-Colombian populations were highly affected, and highest incidences occurred in males, and in people living in rural areas. The average age of affected people is 31.7 years (95% CI 28.3 34.5). The regions with higher incidence are Amazonia and Orinoquia. Species of the genus Bothrops are responsible for the highest number of bites (64.5%), owing to their wide distribution in Colombia. Regarding clinical manifestations, pain and edema were observed in 86.9% and 78.8% of patients, respectively. Cellulitis and abscesses were the most frequent local complications of these envenomings. CONCLUSIONS Results underscore the relevance of snakebite envenoming in Colombia, and provide information for improving the public health attention to these envenoming.
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Affiliation(s)
- Leonardo J León-Núñez
- LL: MD. Enf. Esp. Epidemiología. M. Sc. Estudios de Población. Cruz Roja, Seccional Cundinamarca y Bogotá. Bogotá, Colombia.
| | - Gabriel Camero-Ramos
- GC: MD. Esp. Epidemiología. Esp. Salud Familiar. Esp. Estadística. M. Sc. Educación en Salud. FETP Training Programs in Epidemiology and Public Health Interventions Network TEPHINET Cruz Roja, Seccional Cundinamarca y Bogotá, Bogotá, Colombia.
| | - José M Gutiérrez
- JG: Lic. Microbiología y Química Clínica. Ph. D. Ciencias Fisiológicas; Instituto Clodomiro Picado. Facultad de Microbiología, Universidad de Costa Rica. San José, Costa Rica.
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Abouyannis M, Esmail H, Hamaluba M, Ngama M, Mwangudzah H, Mumba N, Yeri BK, Mwalukore S, Alphan HJ, Aggarwal D, Alcoba G, Cammack N, Chippaux JP, Coldiron ME, Gutiérrez JM, Habib AG, Harrison RA, Isbister GK, Lavonas EJ, Martins D, Ribeiro I, Watson JA, Williams DJ, Casewell NR, Walker SA, Lalloo DG. A global core outcome measurement set for snakebite clinical trials. Lancet Glob Health 2023; 11:e296-e300. [PMID: 36669810 DOI: 10.1016/s2214-109x(22)00479-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 09/09/2022] [Accepted: 10/31/2022] [Indexed: 01/20/2023]
Abstract
Snakebite clinical trials have often used heterogeneous outcome measures and there is an urgent need for standardisation. A globally representative group of key stakeholders came together to reach consensus on a globally relevant set of core outcome measurements. Outcome domains and outcome measurement instruments were identified through searching the literature and a systematic review of snakebite clinical trials. Outcome domains were shortlisted by use of a questionnaire and consensus was reached among stakeholders and the patient group through facilitated discussions and voting. Five universal core outcome measures should be included in all future snakebite clinical trials-mortality, WHO disability assessment scale, patient-specific functional scale, acute allergic reaction by Brown criteria, and serum sickness by formal criteria. Additional syndrome-specific core outcome measures should be used depending on the biting species. This core outcome measurement set provides global standardisation, supports the priorities of patients and clinicians, enables meta-analysis, and is appropriate for use in low-income and middle-income settings.
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Affiliation(s)
- Michael Abouyannis
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool, UK; KEMRI-Wellcome Research Programme, Kilifi, Kenya.
| | - Hanif Esmail
- MRC Clinical Trials Unit at UCL, London, UK; Institute for Global Health, University College London, London, UK
| | - Mainga Hamaluba
- KEMRI-Wellcome Research Programme, Kilifi, Kenya; Centre for Tropical Medicine & Global Health, Nuffield Department of Medicine, Oxford, UK
| | | | | | - Noni Mumba
- KEMRI-Wellcome Research Programme, Kilifi, Kenya
| | - Betty K Yeri
- KEMRI-Wellcome Research Programme, Kilifi, Kenya
| | | | | | | | - Gabriel Alcoba
- Medical Department, Médecins Sans Frontières/Doctors Without Borders, Geneva, Switzerland; Division of Tropical and Humanitarian Medicine, Geneva University Hospitals, Geneva, Switzerland
| | | | - Jean-Philippe Chippaux
- University of Paris Cité, French National Reseach Institute For Sustainable Development, Monther and child in the tropics: pathogens, health system, and epidemiological transformation unit, Paris, France
| | | | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Abdulrazaq G Habib
- Bayero University Department of Infectious and Tropical Diseases, Kano, Nigeria
| | - Robert A Harrison
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Geoffrey K Isbister
- Clinical Toxicology Research Group, University of Newcastle, Newcastle, NSW, Australia
| | - Eric J Lavonas
- Department of Emergency Medicine, Denver Health and Hospital Authority, Denver, Colorado, USA and Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
| | | | - Isabela Ribeiro
- Drugs for Neglected Diseases Initiative, Geneva, Switzerland
| | - James A Watson
- Centre for Tropical Medicine & Global Health, Nuffield Department of Medicine, Oxford, UK; Mahidol Oxford Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - David J Williams
- Regulation and Prequalification Department, Access to Medicines and Health Products Division, World Health Organization, Geneva, Switzerland
| | - Nicholas R Casewell
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool, UK
| | | | - David G Lalloo
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool, UK
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6
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Iturbide M, Fernández J, Gutiérrez JM, Pirani A, Huard D, Al Khourdajie A, Baño-Medina J, Bedia J, Casanueva A, Cimadevilla E, Cofiño AS, De Felice M, Diez-Sierra J, García-Díez M, Goldie J, Herrera DA, Herrera S, Manzanas R, Milovac J, Radhakrishnan A, San-Martín D, Spinuso A, Thyng KM, Trenham C, Yelekçi Ö. Implementation of FAIR principles in the IPCC: the WGI AR6 Atlas repository. Sci Data 2022; 9:629. [PMID: 36243817 PMCID: PMC9569379 DOI: 10.1038/s41597-022-01739-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 03/16/2022] [Accepted: 10/05/2022] [Indexed: 11/09/2022] Open
Abstract
The Sixth Assessment Report (AR6) of the Intergovernmental Panel on Climate Change (IPCC) has adopted the FAIR Guiding Principles. We present the Atlas chapter of Working Group I (WGI) as a test case. We describe the application of the FAIR principles in the Atlas, the challenges faced during its implementation, and those that remain for the future. We introduce the open source repository resulting from this process, including coding (e.g., annotated Jupyter notebooks), data provenance, and some aggregated datasets used in some figures in the Atlas chapter and its interactive companion (the Interactive Atlas), open to scrutiny by the scientific community and the general public. We describe the informal pilot review conducted on this repository to gather recommendations that led to significant improvements. Finally, a working example illustrates the re-use of the repository resources to produce customized regional information, extending the Interactive Atlas products and running the code interactively in a web browser using Jupyter notebooks.
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Affiliation(s)
- Maialen Iturbide
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
| | - Jesús Fernández
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
| | - José M Gutiérrez
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
| | - Anna Pirani
- International Centre for Theoretical Physics (ICTP), Trieste, Italy
| | | | | | - Jorge Baño-Medina
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
| | - Joaquin Bedia
- Dept of Applied Mathematics and Computer Science (MACC), Universidad de Cantabria, Santander, Spain.,Grupo de Meteorología y Computación, Universidad de Cantabria, Unidad Asociada al CSIC, Santander, Spain
| | - Ana Casanueva
- Dept of Applied Mathematics and Computer Science (MACC), Universidad de Cantabria, Santander, Spain.,Grupo de Meteorología y Computación, Universidad de Cantabria, Unidad Asociada al CSIC, Santander, Spain
| | - Ezequiel Cimadevilla
- Dept of Applied Mathematics and Computer Science (MACC), Universidad de Cantabria, Santander, Spain
| | - Antonio S Cofiño
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
| | - Matteo De Felice
- European Commission, Joint Research Centre (JRC), Petten, The Netherlands
| | - Javier Diez-Sierra
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.,Dept of Applied Mathematics and Computer Science (MACC), Universidad de Cantabria, Santander, Spain
| | | | - James Goldie
- 360info, Monash University, Melbourne, Australia
| | - Dimitris A Herrera
- Instituto Geográfico Universitario, Universidad Autónoma de Santo Domingo, Santo Domingo, 10103, Dominican Republic.,Department of Geography & Sustainability, University of Tennessee, 1000 Philip Fulmer Way, Knoxville, TN, 37996-0925, USA
| | - Sixto Herrera
- Dept of Applied Mathematics and Computer Science (MACC), Universidad de Cantabria, Santander, Spain
| | - Rodrigo Manzanas
- Dept of Applied Mathematics and Computer Science (MACC), Universidad de Cantabria, Santander, Spain.,Grupo de Meteorología y Computación, Universidad de Cantabria, Unidad Asociada al CSIC, Santander, Spain
| | - Josipa Milovac
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
| | | | | | - Alessandro Spinuso
- Koninklijk Nederlands Meteorologisch Instituut (KNMI), De Bilt, The Netherlands
| | | | - Claire Trenham
- Commonwealth Scientific & Industrial Research Organisation (CSIRO) - Oceans & Atmosphere, Canberra, Australia
| | - Özge Yelekçi
- IPCC WGI TSU, Universite Paris Saclay, Gif-sur-Yvette, France
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7
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Fernández-Ávila DG, Ávila V, Muñoz O, Moreno I, Ballén D, Veloza J, Gutiérrez JM. Conocimientos y decisiones clínicas de los odontólogos colombianos acerca del riesgo de las osteonecrosis de los maxilares en pacientes que reciben tratamiento para la osteoporosis. Rev Osteoporos Metab Miner 2022. [DOI: 10.4321/s1889-836x2022000100007] [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: 12/05/2022] Open
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8
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Saravia-Otten P, Hernández R, Marroquín N, Pereañez JA, Preciado LM, Vásquez A, García G, Nave F, Rochac L, Genovez V, Mérida M, Cruz SM, Orozco N, Cáceres A, Gutiérrez JM. Inhibition of enzymatic activities of Bothrops asper snake venom and docking analysis of compounds from plants used in Central America to treat snakebite envenoming. J Ethnopharmacol 2022; 283:114710. [PMID: 34626780 DOI: 10.1016/j.jep.2021.114710] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/28/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Snakebite envenoming is a public health problem of high impact in Central America. Bothrops asper, known as barba amarilla, terciopelo, and equis, is the snake species responsible for most snakebites in Central America. In this region, there is a long-standing tradition on the use of plants in the management of snakebites, especially in indigenous communities. Ethnomedical use of Eryngium foetidum L., Neurolaena lobata (L.) Cass. and Pimenta dioica (L.) Merr. to treat snakebite envenoming has been reported in Belice, Guatemala, Nicaragua, and Costa Rica. Extracts of the leaves of these plants have shown anti-venom activities in in vitro assays in previous studies. AIM OF THE STUDY To assess the ability of organic fractions from these three plants to inhibit enzymatic activities associated with toxicity of the venom of B. asper, and to study, by docking analysis, the interaction of metalloproteinase and phospholipases A2 (PLA2) from B. asper venom with secondary metabolites previously described in these plants. MATERIALS AND METHODS Organic fractions were obtained from these three plant species and their ability to neutralize proteolytic, PLA2 and in vitro coagulant activities of B. asper venom was assessed. A phytochemical analysis was carried out in these fractions. The interaction of secondary metabolites previously described in these plants with three toxins from B. asper venom (a metalloproteinase, a PLA2 and a PLA2 homologue) was investigated by docking analysis. RESULTS The inhibitory activity of plants was mainly concentrated in their polar fractions. Acetonic fraction from P. dioica was the most active against PLA2 activity, while the acetonic fraction of E. foetidum completely inhibited the proteolytic activity of the venom. Coagulant activity was partially inhibited only by the acetone and ethyl acetate fractions of P. dioica. Phytochemical analysis of the most bioactive fractions identified flavonoids, saponins, essential oils, coumarins, alkaloids, tannins and sesquiterpene lactones. Docking analysis revealed high affinity interactions of several secondary metabolites of these plants with residues in the vicinity of the catalytic site of these enzymes and, in the case of PLA2 homologue myotoxin II, in the hydrophobic channel. CONCLUSIONS Various fractions from these plants have inhibitory activity against enzymatic actions of B. asper venom which are directly associated with toxicological effects. Docking analysis showed structural evidence of the interaction of secondary metabolites with three toxins. These observations provide support to the potential of these plants to inhibit relevant toxic components of this snake venom.
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Affiliation(s)
- Patricia Saravia-Otten
- Departamento de Bioquímica, Escuela de Química Biológica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala.
| | - Rosario Hernández
- Departamento de Bioquímica, Escuela de Química Biológica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Nereida Marroquín
- Laboratorio de Investigación de Productos Naturales (Lipronat), Escuela de Química Farmacéutica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Jaime A Pereañez
- Toxinología, Alternativas Terapeúticas y Alimentarias, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia, Medellín, Colombia
| | - Lina M Preciado
- Toxinología, Alternativas Terapeúticas y Alimentarias, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia, Medellín, Colombia
| | - Allan Vásquez
- Facultad de Medicina, Universidad Francisco Marroquín, Guatemala
| | - Gabriela García
- Departamento de Bioquímica, Escuela de Química Biológica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Federico Nave
- Dirección General de Investigaciones (DIGI), Universidad de San Carlos de Guatemala, Guatemala
| | - Lorena Rochac
- Laboratorio de Investigación de Productos Naturales (Lipronat), Escuela de Química Farmacéutica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Vicente Genovez
- Departamento de Bioquímica, Escuela de Química Biológica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Max Mérida
- Laboratorio de Investigación de Productos Naturales (Lipronat), Escuela de Química Farmacéutica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Sully M Cruz
- Laboratorio de Investigación de Productos Naturales (Lipronat), Escuela de Química Farmacéutica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Nohemí Orozco
- Departamento de Química Orgánica, Escuela de Química, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala
| | - Armando Cáceres
- Laboratorio de Investigación de Productos Naturales (Lipronat), Escuela de Química Farmacéutica, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, Guatemala; Laboratorios de Productos Naturales Farmaya, Guatemala
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
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9
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Ledsgaard L, Laustsen AH, Pus U, Wade J, Villar P, Boddum K, Slavny P, Masters EW, Arias AS, Oscoz S, Griffiths DT, Luther AM, Lindholm M, Leah RA, Møller MS, Ali H, McCafferty J, Lomonte B, Gutiérrez JM, Karatt-Vellatt A. In vitro discovery of a human monoclonal antibody that neutralizes lethality of cobra snake venom. MAbs 2022; 14:2085536. [PMID: 35699567 PMCID: PMC9225616 DOI: 10.1080/19420862.2022.2085536] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [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] [Indexed: 10/24/2022] Open
Abstract
The monocled cobra (Naja kaouthia) is among the most feared snakes in Southeast Asia due to its toxicity, which is predominantly derived from long-chain α-neurotoxins. The only specific treatment for snakebite envenoming is antivenom based on animal-derived polyclonal antibodies. Despite the lifesaving importance of these medicines, major limitations in safety, supply consistency, and efficacy create a need for improved treatments. Here, we describe the discovery and subsequent optimization of a recombinant human monoclonal immunoglobulin G antibody against α-cobratoxin using phage display technology. Affinity maturation by light chain-shuffling resulted in a significant increase in in vitro neutralization potency and in vivo efficacy. The optimized antibody prevented lethality when incubated with N. kaouthia whole venom prior to intravenous injection. This study is the first to demonstrate neutralization of whole snake venom by a single recombinant monoclonal antibody, thus providing a tantalizing prospect of bringing recombinant antivenoms based on human monoclonal or oligoclonal antibodies to the clinic.
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Affiliation(s)
- Line Ledsgaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Andreas H Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Urska Pus
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Jack Wade
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | | | | | | | - Ana S Arias
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Saioa Oscoz
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | | | | | | | - Marie Sofie Møller
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Hanif Ali
- Quadrucept Bio, Cambourne, United Kingdom
| | | | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
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10
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Nakamoto M, Escalante T, Gutiérrez JM, Shea KJ. A Biomimetic of Endogenous Tissue Inhibitors of Metalloproteinases: Inhibition Mechanism and Contribution of Composition, Polymer Size, and Shape to the Inhibitory Effect. Nano Lett 2021; 21:5663-5670. [PMID: 34181420 DOI: 10.1021/acs.nanolett.1c01357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A biomimetic of endogenous tissue inhibitors of metalloproteinases (TIMPs) was engineered by introducing three binding elements to a synthetic tetrapolymer. We evaluated the contribution of composition, size, and shape of the TIMP-mimicking polymers to the inhibition of BaP1, a P-I class snake venom metalloproteinase (SVMP). Inhibition was achieved when the size of the linear polymer (LP) was comparable to or greater than that of the enzyme, indicating the efficacy requires binding to a significant portion of the enzyme surface in the vicinity of the active site. The efficacy of a low cross-linked polymer hydrogel nanoparticle (NP) of substantially greater molecular weight was comparable to that of the LPs despite differences in size and shape, an important finding for in vivo applications. The abiotic TIMP was effective against two classes of SVMPs in whole snake venom. The results can serve as a design principle for biomimetic polymer inhibitors of enzymes.
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Affiliation(s)
- Masahiko Nakamoto
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Teresa Escalante
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica
| | - Kenneth J Shea
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
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Kazandjian TD, Petras D, Robinson SD, van Thiel J, Greene HW, Arbuckle K, Barlow A, Carter DA, Wouters RM, Whiteley G, Wagstaff SC, Arias AS, Albulescu LO, Plettenberg Laing A, Hall C, Heap A, Penrhyn-Lowe S, McCabe CV, Ainsworth S, da Silva RR, Dorrestein PC, Richardson MK, Gutiérrez JM, Calvete JJ, Harrison RA, Vetter I, Undheim EAB, Wüster W, Casewell NR. Convergent evolution of pain-inducing defensive venom components in spitting cobras. Science 2021; 371:386-390. [PMID: 33479150 PMCID: PMC7610493 DOI: 10.1126/science.abb9303] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 12/07/2020] [Indexed: 01/06/2023]
Abstract
Convergent evolution provides insights into the selective drivers underlying evolutionary change. Snake venoms, with a direct genetic basis and clearly defined functional phenotype, provide a model system for exploring the repeated evolution of adaptations. While snakes use venom primarily for predation, and venom composition often reflects diet specificity, three lineages of cobras have independently evolved the ability to spit venom at adversaries. Using gene, protein, and functional analyses, we show that the three spitting lineages possess venoms characterized by an up-regulation of phospholipase A2 (PLA2) toxins, which potentiate the action of preexisting venom cytotoxins to activate mammalian sensory neurons and cause enhanced pain. These repeated independent changes provide a fascinating example of convergent evolution across multiple phenotypic levels driven by selection for defense.
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Affiliation(s)
- T D Kazandjian
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - D Petras
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA
| | - S D Robinson
- Centre for Advanced Imaging, University of Queensland, St Lucia, QLD 4072, Australia
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD 4072, Australia
| | - J van Thiel
- Institute of Biology, University of Leiden, Leiden 2333BE, Netherlands
| | - H W Greene
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA
| | - K Arbuckle
- Department of Biosciences, College of Science, Swansea University, Swansea SA2 8PP, UK
| | - A Barlow
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
- Molecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - D A Carter
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD 4072, Australia
| | - R M Wouters
- Institute of Biology, University of Leiden, Leiden 2333BE, Netherlands
| | - G Whiteley
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - S C Wagstaff
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
- Research Computing Unit, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - A S Arias
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica
| | - L-O Albulescu
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - A Plettenberg Laing
- Molecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - C Hall
- Molecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - A Heap
- Molecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - S Penrhyn-Lowe
- Molecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - C V McCabe
- School of Earth Sciences, University of Bristol, Bristol BS8 1RL, UK
| | - S Ainsworth
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - R R da Silva
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
- Núcleo de Pesquisa em Produtos Naturais e Sintéticos (NPPNS), Molecular Sciences Department, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - P C Dorrestein
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - M K Richardson
- Institute of Biology, University of Leiden, Leiden 2333BE, Netherlands
| | - J M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501, Costa Rica
| | - J J Calvete
- Evolutionary and Translational Venomics Laboratory, Consejo Superior de Investigaciones Científicas, 46010 Valencia, Spain
| | - R A Harrison
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK
| | - I Vetter
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD 4072, Australia
- School of Pharmacy, University of Queensland, Woolloongabba, QLD 4102, Australia
| | - E A B Undheim
- Centre for Advanced Imaging, University of Queensland, St Lucia, QLD 4072, Australia
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD 4072, Australia
- Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
- Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Blindern, 0316 Oslo, Norway
| | - W Wüster
- Molecular Ecology and Fisheries Genetics Laboratory, School of Natural Sciences, Bangor University, Bangor LL57 2UW, UK
| | - N R Casewell
- Centre for Snakebite Research and Interventions, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.
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Maestro A, Gutiérrez JM, Santamaría E, González C. Rheology of water-in-water emulsions: Caseinate-pectin and caseinate-alginate systems. Carbohydr Polym 2020; 249:116799. [DOI: 10.1016/j.carbpol.2020.116799] [Citation(s) in RCA: 4] [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: 03/23/2020] [Revised: 06/27/2020] [Accepted: 07/17/2020] [Indexed: 10/23/2022]
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Rodríguez JP, Leiguez E, Guijas C, Lomonte B, Gutiérrez JM, Teixeira C, Balboa MA, Balsinde J. A Lipidomic Perspective of the Action of Group IIA Secreted Phospholipase A 2 on Human Monocytes: Lipid Droplet Biogenesis and Activation of Cytosolic Phospholipase A 2α. Biomolecules 2020; 10:biom10060891. [PMID: 32532115 PMCID: PMC7355433 DOI: 10.3390/biom10060891] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/08/2020] [Accepted: 06/10/2020] [Indexed: 12/14/2022] Open
Abstract
Phospholipase A2s constitute a wide group of lipid-modifying enzymes which display a variety of functions in innate immune responses. In this work, we utilized mass spectrometry-based lipidomic approaches to investigate the action of Asp-49 Ca2+-dependent secreted phospholipase A2 (sPLA2) (MT-III) and Lys-49 sPLA2 (MT-II), two group IIA phospholipase A2s isolated from the venom of the snake Bothrops asper, on human peripheral blood monocytes. MT-III is catalytically active, whereas MT-II lacks enzyme activity. A large decrease in the fatty acid content of membrane phospholipids was detected in MT III-treated monocytes. The significant diminution of the cellular content of phospholipid-bound arachidonic acid seemed to be mediated, in part, by the activation of the endogenous group IVA cytosolic phospholipase A2α. MT-III triggered the formation of triacylglycerol and cholesterol enriched in palmitic, stearic, and oleic acids, but not arachidonic acid, along with an increase in lipid droplet synthesis. Additionally, it was shown that the increased availability of arachidonic acid arising from phospholipid hydrolysis promoted abundant eicosanoid synthesis. The inactive form, MT-II, failed to produce any of the effects described above. These studies provide a complete lipidomic characterization of the monocyte response to snake venom group IIA phospholipase A2, and reveal significant connections among lipid droplet biogenesis, cell signaling and biochemical pathways that contribute to initiating the inflammatory response.
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Affiliation(s)
- Juan P. Rodríguez
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Valladolid, 47003 Valladolid, Spain; (J.P.R.); (E.L.); (C.G.); (M.A.B.)
- Laboratorio de Investigaciones Bioquímicas de la Facultad de Medicina (LIBIM), Instituto de Química Básica y Aplicada del Nordeste Argentino (IQUIBA-NEA), Universidad Nacional del Nordeste, Consejo Nacional de Investigaciones Científicas y Técnicas (UNNE-CONICET), Corrientes 3400, Argentina
| | - Elbio Leiguez
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Valladolid, 47003 Valladolid, Spain; (J.P.R.); (E.L.); (C.G.); (M.A.B.)
- Laboratorio de Farmacologia, Instituto Butantan, Sao Paulo 01000, Brazil;
| | - Carlos Guijas
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Valladolid, 47003 Valladolid, Spain; (J.P.R.); (E.L.); (C.G.); (M.A.B.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501–2060, Costa Rica; (B.L.); (J.M.G.)
| | - José M. Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501–2060, Costa Rica; (B.L.); (J.M.G.)
| | - Catarina Teixeira
- Laboratorio de Farmacologia, Instituto Butantan, Sao Paulo 01000, Brazil;
| | - María A. Balboa
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Valladolid, 47003 Valladolid, Spain; (J.P.R.); (E.L.); (C.G.); (M.A.B.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
| | - Jesús Balsinde
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Valladolid, 47003 Valladolid, Spain; (J.P.R.); (E.L.); (C.G.); (M.A.B.)
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-983-423-062
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14
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Fernández-Avila DG, Rincón Riaño DN, Ronderos DM, Gutiérrez JM. [Beliefs and perceptions of the diagnosis and treatment of fibromyalgia in a group of rehabilitation and physical medicine specialists in Colombia]. Rehabilitacion (Madr) 2020; 54:244-248. [PMID: 32473892 DOI: 10.1016/j.rh.2020.02.006] [Citation(s) in RCA: 2] [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: 11/15/2019] [Revised: 01/20/2020] [Accepted: 02/01/2020] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Fibromyalgia is a chronic disease characterised by the presence of musculoskeletal pain, usually associated with other symptoms, including depression, fatigue, and sleep disorders. There is no objective information on the beliefs and perceptions of the diagnosis and treatment of fibromyalgia among rehabilitation and physical medicine specialists. The aim of this study was to describe these beliefs and perceptions among a group of physical medicine and rehabilitation specialists in Colombia. METHODS We performed a cross-sectional study. A focus group was held with the participation of 2 rheumatologists, one physical medicine and rehabilitation specialist and an expert in qualitative research. The group designed a survey to assess the beliefs and perceptions of physical medicine and rehabilitation specialists of the diagnosis and treatment of fibromyalgia. The self-administered, anonymous questionnaire was completed during meetings of the Colombian Association of Physical Medicine and Rehabilitation. RESULTS The questionnaire was completed by 99 physical medicine and rehabilitation specialists. Of these, 17.1% (n=17) believed there was insufficient evidence to consider fibromyalgia a disease, 86.8% (n=86) used the ACR 1990 criteria to diagnose patients with fibromyalgia, and 33.3% (n=33) used the criteria of the 2010 classification. The most commonly used drugs for the management of fibromyalgia were antidepressants, prescribed by 84.8% of the surveyed physicians, followed by analgesics (75.7%) and anticonvulsants (66.6%). Concerning multidisciplinary management, 50.6% referred these patients to a rheumatologist and 40.7% to a psychiatrist. In all, 77.2% of rehabilitation specialists believed that patients with fibromyalgia should be managed by their specialty. CONCLUSION This study provides information on perceptions of the diagnosis and treatment of fibromyalgia among a group of Colombian rehabilitation specialists and found frequent use of the ACR 1990 classification. Among these physicians, the use of drugs, especially antidepressants and analgesics, was high. Most believed that patients with fibromyalgia should be treated by rehabilitation specialists.
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Affiliation(s)
- D G Fernández-Avila
- Rheumatology Unit, Department of Internal Medicine, Hospital Universitario San Ignacio, School of Medicine, Pontificia Universidad Javeriana, Bogotá, Colombia.
| | - D N Rincón Riaño
- Rheumatology Service, Hospital Militar Central, Universidad Militar Nueva Granada, Bogotá, Colombia
| | - D M Ronderos
- Rheumatology Unit, Department of Internal Medicine, Hospital Universitario San Ignacio, School of Medicine, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - J M Gutiérrez
- Rheumatology Unit, Department of Internal Medicine, Hospital Universitario San Ignacio, School of Medicine, Pontificia Universidad Javeriana, Bogotá, Colombia
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Krause KE, Jenkins TP, Skaarup C, Engmark M, Casewell NR, Ainsworth S, Lomonte B, Fernández J, Gutiérrez JM, Lund O, Laustsen AH. An interactive database for the investigation of high-density peptide microarray guided interaction patterns and antivenom cross-reactivity. PLoS Negl Trop Dis 2020; 14:e0008366. [PMID: 32579606 PMCID: PMC7313730 DOI: 10.1371/journal.pntd.0008366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 02/25/2020] [Accepted: 05/06/2020] [Indexed: 12/19/2022] Open
Abstract
Snakebite envenoming is a major neglected tropical disease that affects millions of people every year. The only effective treatment against snakebite envenoming consists of unspecified cocktails of polyclonal antibodies purified from the plasma of immunized production animals. Currently, little data exists on the molecular interactions between venom-toxin epitopes and antivenom-antibody paratopes. To address this issue, high-density peptide microarray (hdpm) technology has recently been adapted to the field of toxinology. However, analysis of such valuable datasets requires expert understanding and, thus, complicates its broad application within the field. In the present study, we developed a user-friendly, and high-throughput web application named "Snake Toxin and Antivenom Binding Profiles" (STAB Profiles), to allow straight-forward analysis of hdpm datasets. To test our tool and evaluate its performance with a large dataset, we conducted hdpm assays using all African snake toxin protein sequences available in the UniProt database at the time of study design, together with eight commercial antivenoms in clinical use in Africa, thus representing the largest venom-antivenom dataset to date. Furthermore, we introduced a novel method for evaluating raw signals from a peptide microarray experiment and a data normalization protocol enabling intra-microarray and even inter-microarray chip comparisons. Finally, these data, alongside all the data from previous similar studies by Engmark et al., were preprocessed according to our newly developed protocol and made publicly available for download through the STAB Profiles web application (http://tropicalpharmacology.com/tools/stab-profiles/). With these data and our tool, we were able to gain key insights into toxin-antivenom interactions and were able to differentiate the ability of different antivenoms to interact with certain toxins of interest. The data, as well as the web application, we present in this article should be of significant value to the venom-antivenom research community. Knowledge gained from our current and future analyses of this dataset carry the potential to guide the improvement and optimization of current antivenoms for maximum patient benefit, as well as aid the development of next-generation antivenoms.
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Affiliation(s)
- Kamille E. Krause
- Department of Bio and Health Informatics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Timothy P. Jenkins
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Carina Skaarup
- Department of Bio and Health Informatics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Mikael Engmark
- Department of Bio and Health Informatics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Nicholas R. Casewell
- Centre for Snakebite Research & Interventions, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - Stuart Ainsworth
- Centre for Snakebite Research & Interventions, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Julián Fernández
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - José M. Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Ole Lund
- Department of Bio and Health Informatics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Andreas H. Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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De Arruda Caires G, Verardo CV, Leiguez E, Gutiérrez JM, Teixeira C, Fernandes CM. ADAM-17 is relevant to the release of TNF-α induced by a snake venom metalloproteinase in macrophages. Toxicon 2019. [DOI: 10.1016/j.toxicon.2019.06.099] [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: 11/26/2022]
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Pla D, Sanz L, Quesada-Bernat S, Villalta M, Baal J, Chowdhury MAW, León G, Gutiérrez JM, Kuch U, Calvete JJ. Phylovenomics of Daboia russelii across the Indian subcontinent. Bioactivities and comparative in vivo neutralization and in vitro third-generation antivenomics of antivenoms against venoms from India, Bangladesh and Sri Lanka. J Proteomics 2019; 207:103443. [PMID: 31325606 DOI: 10.1016/j.jprot.2019.103443] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [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: 05/24/2019] [Accepted: 07/14/2019] [Indexed: 02/07/2023]
Abstract
Russell's viper (Daboia russelii) is, together with Naja naja, Bungarus caeruleus and Echis carinatus, a member of the medically important 'Big Four' species responsible for causing a large number of morbidity and mortality cases across the Indian subcontinent. Despite the wide distribution of Russell's viper and the well-documented ubiquity of the phenomenon of geographic variability of intraspecific snake venom composition, Indian polyvalent antivenoms against the "Big Four" venoms are raised against venoms sourced mainly from Chennai in the southeastern Indian state of Tamil Nadu. Biochemical and venomics investigations have consistently revealed notable compositional, functional, and immunological differences among geographic variants of Russell's viper venoms across the Indian subcontinent. However, these studies, carried out by different laboratories using different protocols and involving venoms from a single geographical region, make the comparison of the different venoms difficult. To bridge this gap, we have conducted bioactivities and proteomic analyses of D. russelii venoms from the three corners of the Indian subcontinent, Pakistan, Bangladesh, and Tamil Nandu (India) and Sri Lanka, along with comparative in vivo neutralization and in vitro third-generation antivenomics of antivenoms used in India, Bangladesh and Sri Lanka. These analyses let us to propose two alternative routes of radiation for Russell's viper in the Indian subcontinent. Both radiations, towards the northeast of India and Bangladesh and towards south India and Sri Lanka, have a common origin in Pakistan, and provide a phylovenomics ground for rationalizing the geographic variability in venom composition and their distinct immunoreactivity against available antivenoms. BIOLOGICAL SIGNIFICANCE: Russell's viper (Daboia russelii), the Indian cobra (Naja naja), the common krait (Bungarus caeruleus), and the saw-scaled viper (Echis carinatus) constitute the 'Big Four' snake species responsible for most snakebite envenomings and deaths in the Indian subcontinent. Despite the medical relevance of Daboia russelii, and the well documented variations in the clinical manifestations of envenomings by this wide distributed species, which are doubtless functionally related to differences in venom composition of its geographic variants, antivenoms for the clinical treatment of envenomings by D. russelii across the Indian subcontinent are invariably raised using venom sourced mainly from the southeastern Indian state of Tamil Nadu. We have applied a phylovenomics approach to compare the venom proteomes of Russell's vipers from the three corners of the Indian subcontinent, Pakistan, Bangladesh, and South India/Sri Lanka, and have assessed the in vitro (third-generation antivenomics) and in vivo preclinical efficacy of a panel of homologous antivenoms. The identification of two dispersal routes of ancestral D. russelii into the Indian subcontinent provides the ground for rationalizing the variability in composition and immunoreactivity of the venoms of extant geographic variants of Russell's viper. Such knowledge is relevant for envisioning strategies to improve the clinical coverage of anti- D. russelii antivenoms.
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Affiliation(s)
- Davinia Pla
- Evolutionary and Translational Venomics Laboratory, Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - Libia Sanz
- Evolutionary and Translational Venomics Laboratory, Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - Sarai Quesada-Bernat
- Evolutionary and Translational Venomics Laboratory, Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - Mauren Villalta
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - Joshua Baal
- Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 52, 67663 Kaiserslautern, Germany
| | | | - Guillermo León
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica.
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica.
| | - Ulrich Kuch
- Institute of Occupational Medicine, Social Medicine and Environmental Medicine, Goethe University, Frankfurt am Main, Germany.
| | - Juan J Calvete
- Evolutionary and Translational Venomics Laboratory, Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain.
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Zdenek CN, Hay C, Arbuckle K, Jackson TNW, Bos MHA, Op den Brouw B, Debono J, Allen L, Dunstan N, Morley T, Herrera M, Gutiérrez JM, Williams DJ, Fry BG. Coagulotoxic effects by brown snake (Pseudonaja) and taipan (Oxyuranus) venoms, and the efficacy of a new antivenom. Toxicol In Vitro 2019; 58:97-109. [PMID: 30910521 DOI: 10.1016/j.tiv.2019.03.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 08/09/2018] [Revised: 03/12/2019] [Accepted: 03/21/2019] [Indexed: 01/03/2023]
Abstract
Snakebite is a neglected tropical disease that disproportionately affects the poor. Antivenom is the only specific and effective treatment for snakebite, but its distribution is severely limited by several factors, including the prohibitive cost of some products. Papua New Guinea (PNG) is a snakebite hotspot but the high costs of Australian antivenoms (thousands of dollars per treatment) makes it unaffordable in PNG. A more economical taipan antivenom has recently been developed at the Instituto Clodomiro Picado (ICP) in Costa Rica for PNG and is currently undergoing clinical trials for the treatment of envenomations by coastal taipans (Oxyuranus scutellatus). In addition to potentially having the capacity to neutralise the effects of envenomations of non-PNG taipans, this antivenom may have the capacity to neutralise coagulotoxins in venom from closely related brown snakes (Pseudonaja spp.) also found in PNG. Consequently, we investigated the cross-reactivity of taipan antivenom across the venoms of all Oxyuranus and Pseudonaja species. In addition, to ascertain differences in venom biochemistry that influence variation in antivenom efficacy, we tested for relative cofactor dependence. We found that the new ICP taipan antivenom exhibited high selectivity for Oxyuranus venoms and only low to moderate cross-reactivity with any Pseudonaja venoms. Consistent with this genus level distinction in antivenom efficacy were fundamental differences in the venom biochemistry. Not only were the Pseudonaja venoms significantly more procoagulant, but they were also much less dependent upon the cofactors calcium and phospholipid. There was a strong correlation between antivenom efficacy, clotting time and cofactor dependence. This study sheds light on the structure-function relationships of the procoagulant toxins within these venoms and may have important clinical implications including for the design of next-generation antivenoms.
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Affiliation(s)
- Christina N Zdenek
- Venom Evolution Lab, School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Chris Hay
- Venom Evolution Lab, School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia; Reptile Kingdom Australia, Carrara, QLD, Australia
| | - Kevin Arbuckle
- Department of Biosciences, College of Science, Swansea University, SA2 8PP, United Kingdom
| | - Timothy N W Jackson
- Australian Venom Research Unit, Department of Pharmacology and Therapeutics, University of Melbourne, 3010, VIC, Australia
| | - Mettine H A Bos
- Division of Thrombosis and Hemostasis, Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, Albinusdreef 2, 2333, ZA, Leiden, the Netherlands
| | - Bianca Op den Brouw
- Venom Evolution Lab, School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Jordan Debono
- Venom Evolution Lab, School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Luke Allen
- Venom Supplies Pty Ltd, Stonewell Rd, Tanunda, SA 5352, Australia
| | - Nathan Dunstan
- Venom Supplies Pty Ltd, Stonewell Rd, Tanunda, SA 5352, Australia
| | | | - María Herrera
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José 11501-2060, Costa Rica
| | - David J Williams
- Australian Venom Research Unit, Department of Pharmacology and Therapeutics, University of Melbourne, 3010, VIC, Australia; Charles Campbell Toxinology Centre, School of Medicine and Health Sciences, University of Papua New Guinea, Boroko 121, National Capital District, Papua New Guinea
| | - Bryan G Fry
- Venom Evolution Lab, School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia.
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Barrero JP, García-Herrero S, Mariscal MA, Gutiérrez JM. Data on the main working conditions with influence on the development of hearing loss amongst the occupational population in Spain. Data Brief 2018; 20:1004-1017. [PMID: 30225315 PMCID: PMC6138837 DOI: 10.1016/j.dib.2018.08.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 07/23/2018] [Revised: 08/14/2018] [Accepted: 08/21/2018] [Indexed: 11/27/2022] Open
Abstract
Obtaining reliable and objective data on certain working conditions is necessary to analyse the causes and variables that can influence the development of hearing loss amongst the working population. Objective occupational data have been collected from a heterogeneous sample of 1418 workers in Spain, see “How activity type, time on the job and noise level on the job affect the hearing of the working population. Using Bayesian networks to predict the development of hipoacusia” (Barrero et al., 2018) [1]. Among the main factors analysed are the noise levels to which these workers are exposed, measured at their respective workstations, and the assessment of their hearing status, evaluated by audiometric medical tests. These factors provide information to predict the development of hypoacusia.
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Ainsworth S, Petras D, Engmark M, Süssmuth RD, Whiteley G, Albulescu LO, Kazandjian TD, Wagstaff SC, Rowley P, Wüster W, Dorrestein PC, Arias AS, Gutiérrez JM, Harrison RA, Casewell NR, Calvete JJ. The medical threat of mamba envenoming in sub-Saharan Africa revealed by genus-wide analysis of venom composition, toxicity and antivenomics profiling of available antivenoms. J Proteomics 2017; 172:173-189. [PMID: 28843532 DOI: 10.1016/j.jprot.2017.08.016] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/05/2017] [Accepted: 08/22/2017] [Indexed: 12/23/2022]
Abstract
Mambas (genus Dendroaspis) are among the most feared of the medically important elapid snakes found in sub-Saharan Africa, but many facets of their biology, including the diversity of venom composition, remain relatively understudied. Here, we present a reconstruction of mamba phylogeny, alongside genus-wide venom gland transcriptomic and high-resolution top-down venomic analyses. Whereas the green mambas, D. viridis, D. angusticeps, D. j. jamesoni and D. j. kaimosae, express 3FTx-predominant venoms, black mamba (D. polylepis) venom is dominated by dendrotoxins I and K. The divergent terrestrial ecology of D. polylepis compared to the arboreal niche occupied by all other mambas makes it plausible that this major difference in venom composition is due to dietary variation. The pattern of intrageneric venom variability across Dendroaspis represented a valuable opportunity to investigate, in a genus-wide context, the variant toxicity of the venom, and the degree of paraspecific cross-reactivity between antivenoms and mamba venoms. To this end, the immunological profiles of the five mamba venoms were assessed against a panel of commercial antivenoms generated for the sub-Saharan Africa market. This study provides a genus-wide overview of which available antivenoms may be more efficacious in neutralising human envenomings caused by mambas, irrespective of the species responsible. The information gathered in this study lays the foundations for rationalising the notably different potency and pharmacological profiles of Dendroaspis venoms at locus resolution. This understanding will allow selection and design of toxin immunogens with a view to generating a safer and more efficacious pan-specific antivenom against any mamba envenomation. BIOLOGICAL SIGNIFICANCE The mambas (genus Dendroaspis) comprise five especially notorious medically important venomous snakes endemic to sub-Saharan Africa. Their highly potent venoms comprise a high diversity of pharmacologically active peptides, including extremely rapid-acting neurotoxins. Previous studies on mamba venoms have focused on the biochemical and pharmacological characterisation of their most relevant toxins to rationalize the common neurological and neuromuscular symptoms of envenomings caused by these species, but there has been little work on overall venom composition or comparisons between them. Only very recently an overview of the composition of the venom of two Dendroaspis species, D. angusticeps and D. polylepis, has been unveiled through venomics approaches. Here we present the first genus-wide transcriptomic-proteomic analysis of mamba venom composition. The transcriptomic analyses described in this paper have contributed 29 (D. polylepis), 23 (D. angusticeps), 40 (D. viridis), 25 (D. j. jamesoni) and 21 (D. j. kaimosae), novel full-length toxin sequences to the non-redundant Dendroaspis sequence database. The mamba genus-wide venomic analysis demonstrated that major D. polylepis venom components are Kunitz-fold family toxins. This feature is unique in relation to the relatively conserved three-finger toxin (3FTx)-dominated venom compositions of the green mambas. Venom variation was interpreted in the context of dietary variation due to the divergent terrestrial ecology of D. polylepis compared to the arboreal niche occupied by all other mambas. Additionally, the degree of cross-reactivity conservation of mamba venoms was assessed by antivenomics against a panel of commercial antivenoms generated for the sub-Saharan Africa market. This study provides a genus-wide overview to infer which available antivenoms may be capable of neutralising human envenomings caused by mambas, irrespective of the species responsible. The information gathered in this study lays the foundations for rationalising the pharmacological profiles of mamba venoms at locus resolution. This understanding will contribute to the generation of a safer and more efficacious pan-Dendroaspis therapeutic antivenom against any mamba envenomation.
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Affiliation(s)
- Stuart Ainsworth
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Daniel Petras
- University of California San Diego, Skaggs School of Pharmacy & Pharmaceutical Sciences, 9500 Gilman Dr, La Jolla, CA 92093, USA; Technische Universität Berlin, Institut für Chemie, Straße des 17.Juni 124, 10623 Berlin, Germany
| | - Mikael Engmark
- Technical University of Denmark, Department of Bio and Health Informatics, 2800 Kgs. Lyngby, Denmark
| | - Roderich D Süssmuth
- Technische Universität Berlin, Institut für Chemie, Straße des 17.Juni 124, 10623 Berlin, Germany
| | - Gareth Whiteley
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Laura-Oana Albulescu
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Taline D Kazandjian
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Simon C Wagstaff
- Bioinformatics Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Paul Rowley
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Wolfgang Wüster
- Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University, Bangor LL57 2UW, United Kingdom
| | - Pieter C Dorrestein
- University of California San Diego, Skaggs School of Pharmacy & Pharmaceutical Sciences, 9500 Gilman Dr, La Jolla, CA 92093, USA
| | - Ana Silvia Arias
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - José M Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Robert A Harrison
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Nicholas R Casewell
- Alistair Reid Venom Research Unit, Parasitology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, United Kingdom.
| | - Juan J Calvete
- Instituto de Biomedicina de Valencia, Consejo Superior de Investigaciones Científicas (CSIC), Jaume Roig 11, 46010, Valencia, Spain.
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Barón-Esquivias G, Gómez S, Brufau H, García L, Amo C, Gutiérrez JM, Wu L, Salmerón F, Pinilla S, López V. Indicadores asistenciales en pacientes con fibrilación auricular: evaluación del manejo de los problemas clínicos y de las diferencias por sexo. Rev Esp Cardiol 2016. [DOI: 10.1016/j.recesp.2015.08.020] [Citation(s) in RCA: 5] [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: 11/29/2022]
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Lupo B, Maestro A, Gutiérrez JM, González C. Characterization of alginate beads with encapsulated cocoa extract to prepare functional food: Comparison of two gelation mechanisms. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2015.02.023] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gutiérrez JM, Ortega M, Ardela E, Lorenzo G, Martín Pinto F. [Endoscopic incision of intravesical ureteroceles in patients with duplex system]. Cir Pediatr 2014; 27:107-109. [PMID: 25845098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE To evaluate the clinical status and renal function of pa- tients with duplex system and intravesical ureterocele after drainage by cystoscopy. MATERIAL AND METHODS In 9 patients with duplex system and intravesical ureterocele drainage was performed to present recurrent urinary tract infections (7 children with episodes of pyelonephritis and sepsis) or obstruction of the urinary drainage. The mean age was 33 months (range 8-108 months). The thecnique was done under general anesthesia in the operating room and puncture of the ureterocele was performed using cystourethroscopy with loop electrode. The minimum follow-up was 12 months (range 12-48 months) and includes renal ultrasound, renal isotopic study (Mag3 with furosemide) and-echocystography study in patients with preoperative vesicoureteral reflux or postoperative urinary tract infection. RESULTS The average operative time was 60 minutes. Mean hospital stay was 48 hours. There were no complications during the procedure. In five patients urinary infection episodes disappeared. Ultrasound demonstrated decreased hydronephrosis and megaureter. In two patients the differential renal function following the technique improved. One patient with preoperative split renal function of 14% required nephrectomy. One patient had postoperative vesicoureteral reflux. CONCLUSIONS The drainage of intravesical ureterocele in patients with duplex system reduces episodes of urinary tract infection and urinary tract dilation.
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Lupo B, Maestro A, Porras M, Gutiérrez JM, González C. Preparation of alginate microspheres by emulsification/internal gelation to encapsulate cocoa polyphenols. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.11.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [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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García-Herrero S, Mariscal MA, Gutiérrez JM, Ritzel DO. Using Bayesian networks to analyze occupational stress caused by work demands: preventing stress through social support. Accid Anal Prev 2013; 57:114-123. [PMID: 23672926 DOI: 10.1016/j.aap.2013.04.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 02/20/2013] [Accepted: 04/09/2013] [Indexed: 06/02/2023]
Abstract
Occupational stress is a major health hazard and a serious challenge to the effective operation of any company and represents a major problem for both individuals and organizations. Previous researches have shown that high demands (e.g. workload, emotional) combined with low resources (e.g. support, control, rewards) are associated with adverse health (e.g. psychological, physical) and organizational impacts (e.g. reduced job satisfaction, sickness absence). The objective of the present work is to create a model to analyze how social support reduces the occupational stress caused by work demands. This study used existing Spanish national data on working conditions collected by the Spanish Ministry of Labour and Immigration in 2007, where 11,054 workers were interviewed by questionnaire. A probabilistic model was built using Bayesian networks to explain the relationships between work demands and occupational stress. The model also explains how social support contributes positively to reducing stress levels. The variables studied were intellectually demanding work, overwork, workday, stress, and social support. The results show the importance of social support and of receiving help from supervisors and co-workers in preventing occupational stress. The study provides a new methodology that explains and quantifies the effects of intellectually demanding work, overwork, and workday in occupational stress. Also, the study quantifies the importance of social support to reduce occupational stress.
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Fernández J, Caccin P, Koster G, Lomonte B, Gutiérrez JM, Montecucco C, Postle AD. Muscle phospholipid hydrolysis byBothrops asperAsp49 and Lys49 phospholipase A2myotoxins - distinct mechanisms of action. FEBS J 2013; 280:3878-86. [DOI: 10.1111/febs.12386] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 06/06/2013] [Accepted: 06/10/2013] [Indexed: 12/12/2022]
Affiliation(s)
- Julián Fernández
- Department of Biomedical Sciences and National Research Council Institute of Neuroscience; University of Padova; Italy
| | - Paola Caccin
- Department of Biomedical Sciences and National Research Council Institute of Neuroscience; University of Padova; Italy
| | - Grielof Koster
- National Institute for Health Research Respiratory Medicine Biomedical Research Unit; University Hospitals Southampton; UK
| | - Bruno Lomonte
- Instituto Clodomiro Picado; Facultad de Microbiología; Universidad de Costa Rica; Costa Rica
| | - José M. Gutiérrez
- Instituto Clodomiro Picado; Facultad de Microbiología; Universidad de Costa Rica; Costa Rica
| | - Cesare Montecucco
- Department of Biomedical Sciences and National Research Council Institute of Neuroscience; University of Padova; Italy
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Durban J, Pérez A, Sanz L, Gómez A, Bonilla F, Rodríguez S, Chacón D, Sasa M, Angulo Y, Gutiérrez JM, Calvete JJ. Integrated "omics" profiling indicates that miRNAs are modulators of the ontogenetic venom composition shift in the Central American rattlesnake, Crotalus simus simus. BMC Genomics 2013; 14:234. [PMID: 23575160 PMCID: PMC3660174 DOI: 10.1186/1471-2164-14-234] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [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: 11/12/2012] [Accepted: 03/14/2013] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Understanding the processes that drive the evolution of snake venom is a topic of great research interest in molecular and evolutionary toxinology. Recent studies suggest that ontogenetic changes in venom composition are genetically controlled rather than environmentally induced. However, the molecular mechanisms underlying these changes remain elusive. Here we have explored the basis and level of regulation of the ontogenetic shift in the venom composition of the Central American rattlesnake, Crotalus s. simus using a combined proteomics and transcriptomics approach. RESULTS Proteomic analysis showed that the ontogenetic shift in the venom composition of C. s. simus is essentially characterized by a gradual reduction in the expression of serine proteinases and PLA2 molecules, particularly crotoxin, a β-neurotoxic heterodimeric PLA2, concominantly with an increment of PI and PIII metalloproteinases at age 9-18 months. Comparison of the transcriptional activity of the venom glands of neonate and adult C. s. simus specimens indicated that their transcriptomes exhibit indistinguisable toxin family profiles, suggesting that the elusive mechanism by which shared transcriptomes generate divergent venom phenotypes may operate post-transcriptionally. Specifically, miRNAs with frequency count of 1000 or greater exhibited an uneven distribution between the newborn and adult datasets. Of note, 590 copies of a miRNA targeting crotoxin B-subunit was exclusively found in the transcriptome of the adult snake, whereas 1185 copies of a miRNA complementary to a PIII-SVMP mRNA was uniquely present in the newborn dataset. These results support the view that age-dependent changes in the concentration of miRNA modulating the transition from a crotoxin-rich to a SVMP-rich venom from birth through adulthood can potentially explain what is observed in the proteomic analysis of the ontogenetic changes in the venom composition of C. s. simus. CONCLUSIONS Existing snake venom toxins are the result of early recruitment events in the Toxicofera clade of reptiles by which ordinary genes were duplicated, and the new genes selectively expressed in the venom gland and amplified to multigene families with extensive neofunctionalization throughout the approximately 112-125 million years of ophidian evolution. Our findings support the view that understanding the phenotypic diversity of snake venoms requires a deep knowledge of the mechanisms regulating the transcriptional and translational activity of the venom gland. Our results suggest a functional role for miRNAs. The impact of specific miRNAs in the modulation of venom composition, and the integration of the mechanisms responsible for the generation of these miRNAs in the evolutionary landscape of the snake's venom gland, are further challenges for future research.
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Affiliation(s)
- Jordi Durban
- Instituto de Biomedicina de Valencia, Consejo Superior de Investigaciones Científicas, Jaime Roig 11, Valencia 46010, Spain
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Quintana JC, Chacón AM, Vargas L, Segura C, Gutiérrez JM, Alarcón JC. Antiplasmodial effect of the venom of Crotalus durissus cumanensis, crotoxin complex and Crotoxin B. Acta Trop 2012; 124:126-32. [PMID: 22884508 DOI: 10.1016/j.actatropica.2012.07.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Revised: 07/08/2012] [Accepted: 07/12/2012] [Indexed: 12/25/2022]
Abstract
The antiplasmodial activity of phospholipases A(2) (PLA(2)) isolated from different animals has been studied. We explored the in vitro anti Plasmodium falciparum effect of a fraction containing crotoxin, Crotoxin B and whole venom of the rattlesnake Crotalus durissus cumanensis. Fraction II (crotoxin complex) was obtained by size exclusion chromatography, whereas Crotoxin B was purified by RP-HPLC. The whole venom is active against the parasite at concentrations of 0.17±0.03 μg/ml, fraction II at 0.76±0.17 μg/ml and Crotoxin B at 0.6±0.04 μg/ml. Differences were observed in the cytotoxic activity against peripheral mononuclear cells, with Crotoxin B exhibiting the highest cytotoxicity. The concentration of Crotoxin B required to exert cytotoxic activity was higher than that required to exert antiplasmodial activity. Lethality in mice confirmed the higher toxicity and neurotoxicity of whole venom and fraction II, whereas Crotoxin B was not lethal at the doses tested. These results suggest the potential of Crotoxin B as a lead compound for antimalarial activity.
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Affiliation(s)
- J C Quintana
- Programa de Ofidismo/Escorpionismo, Universidad de Antioquia, Medellín, Colombia.
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Fox JW, Rucavado A, Escalante T, Kim J, Gutiérrez JM. 160. Role of SVMPs, Matrikines and TLR4 in Snake Venom Induced Edema and Inflammation. Toxicon 2012. [DOI: 10.1016/j.toxicon.2012.04.161] [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]
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May A, Pasc A, Stébé MJ, Gutiérrez JM, Porras M, Blin JL. Tailored jeffamine molecular tools for ordering mesoporous silica. Langmuir 2012; 28:9816-9824. [PMID: 22650907 DOI: 10.1021/la301413u] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Herein, we report the formation of organized mesoporous silica materials prepared from a novel nonionic gemini surfactant, myristoyl-end-capped Jeffamine, synthesized from a polyoxyalkyleneamine (ED900). The behavior of the modified Jeffamine in water was first investigated. A direct micellar phase (L(1)) and a hexagonal (H(1)) liquid crystal were found. The structure of the micelles was investigated from the SAXS and the analysis by generalized indirect Fourier transformation, which show that the particles are globular of core-shell type. The myristoyl chains, located at the ends of the amphiphile molecule, are assembled to form the core of the micelles and, as a consequence, the molecules are folded over on themselves. Mesoporous materials were then synthesized from the self-assembly mechanism. The recovered materials were characterized by SAXS measurements, nitrogen adsorption-desorption analysis, and transmission and scanning electron microscopy. The results clearly evidence that by modifying the synthesis parameters, such as the surfactant/silica precursor molar ratio and the hydrothermal conditions, one can control the size and the nanostructuring of the resulting material. It was observed that, the lower the temperature of the hydrothermal treatment, the better the mesopore ordering.
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Affiliation(s)
- A May
- Université de Lorraine, SRSMC, UMR7565, F-54506 Vandoeuvre-lès-Nancy cedex, France
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Aguado-Giménez F, Piedecausa MA, Gutiérrez JM, García-Charton JA, Belmonte A, García-García B. Benthic recovery after fish farming cessation: a "beyond-BACI" approach. Mar Pollut Bull 2012; 64:729-738. [PMID: 22386801 DOI: 10.1016/j.marpolbul.2012.02.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 01/30/2012] [Accepted: 02/08/2012] [Indexed: 05/31/2023]
Abstract
The development of a benthic environment after fish-farming cessation was examined. To ascertain whether recovery occurred, several abiotic (granulometry, acid-volatile sulfides, total phosphorus and redox potential) and biotic (polychaete abundance) variables were monitored using a "beyond-BACI" approach. Before the cessation of farming, the geochemical conditions and polychaete assemblages differed among the impacted and control sites. After cessation, an improvement of the geochemical conditions was achieved. A significant tendency toward a recovery of the polychaete assemblage in the impacted area was observed, but significant differences still remained compared with the control sites. The acid-volatile sulfide level was responsible for these differences. The abundance of polychaete families associated with organically enriched sediments diminished at the impacted site after cessation, whereas the abundance of some sensitive and omnivorous families increased. The "beyond-BACI" approach provided a wider framework than other approaches, enabling us to differentiate the natural variability from those changes induced by the fish farm and farming cessation.
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Affiliation(s)
- F Aguado-Giménez
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Estación de Acuicultura Marina, Puerto de San Pedro del Pinatar, 30740 Murcia, Spain.
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May A, Stébé MJ, Gutiérrez JM, Blin JL. Coexistence of two kinds of fluorinated hydrogenated micelles as building blocks for the design of bimodal mesoporous silica with two ordered mesopore networks. Langmuir 2011; 27:14000-14004. [PMID: 22043901 DOI: 10.1021/la203753q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A simple and effective route has been developed for the synthesis of bimodal (3.6 and 9.4 nm) mesoporous silica materials that have two ordered interconnected pore networks. Mesostructures have been prepared through the self-assembly mechanism by using a mixture of polyoxyethylene fluoroalkyl ether and triblock copolymer as building blocks. The investigation of the R(F)(8)(EO)(9)/P123/water phase diagram shows that in the considered surfactant range of concentrations the system is micellar (L(1)). DLS measurements indicate that this micellar phase is composed of two types of micelles; the size of the first one at around 7.6 nm corresponds unambiguously to the pure fluorinated micelles. The second type of micelles at higher diameter consists of fluorinated micelles that have accommodated a weak fraction of P123 molecules. Thus, in this study the bimodal mesoporous silica is really templated by two kinds of micelles.
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Affiliation(s)
- A May
- Chemical Engineering Department, Chemistry Faculty, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Catalonia, Spain
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Moreno PA, Vélez PE, Martínez E, Garreta LE, Díaz N, Amador S, Tischer I, Gutiérrez JM, Naik AK, Tobar F, García F. The human genome: a multifractal analysis. BMC Genomics 2011; 12:506. [PMID: 21999602 PMCID: PMC3277318 DOI: 10.1186/1471-2164-12-506] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [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: 04/13/2011] [Accepted: 10/14/2011] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Several studies have shown that genomes can be studied via a multifractal formalism. Recently, we used a multifractal approach to study the genetic information content of the Caenorhabditis elegans genome. Here we investigate the possibility that the human genome shows a similar behavior to that observed in the nematode. RESULTS We report here multifractality in the human genome sequence. This behavior correlates strongly on the presence of Alu elements and to a lesser extent on CpG islands and (G+C) content. In contrast, no or low relationship was found for LINE, MIR, MER, LTRs elements and DNA regions poor in genetic information. Gene function, cluster of orthologous genes, metabolic pathways, and exons tended to increase their frequencies with ranges of multifractality and large gene families were located in genomic regions with varied multifractality. Additionally, a multifractal map and classification for human chromosomes are proposed. CONCLUSIONS Based on these findings, we propose a descriptive non-linear model for the structure of the human genome, with some biological implications. This model reveals 1) a multifractal regionalization where many regions coexist that are far from equilibrium and 2) this non-linear organization has significant molecular and medical genetic implications for understanding the role of Alu elements in genome stability and structure of the human genome. Given the role of Alu sequences in gene regulation, genetic diseases, human genetic diversity, adaptation and phylogenetic analyses, these quantifications are especially useful.
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Affiliation(s)
- Pedro A Moreno
- Escuela de Ingeniería de Sistemas y Computación, Universidad del Valle, Santiago de Cali, Colombia.
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Aguado-Giménez F, Piedecausa MA, Carrasco C, Gutiérrez JM, Aliaga V, García-García B. Do benthic biofilters contribute to sustainability and restoration of the benthic environment impacted by offshore cage finfish aquaculture? Mar Pollut Bull 2011; 62:1714-1724. [PMID: 21669446 DOI: 10.1016/j.marpolbul.2011.05.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 05/19/2011] [Accepted: 05/20/2011] [Indexed: 05/30/2023]
Abstract
Benthic biofilters were deployed under a cage fish farm and in two reference locations to assess the influence of the farm on the biofilters and the surroundings, as well as to verify the usefulness of this technology as a mitigation tool. The biofilters underneath the farm recruited a fouling community practically identical to that of the control biofilters, which included a variety of trophic strategies. The former showed a higher 15N enrichment, indicating that fouling beneath the farm was benefiting from the farm waste. The waste retention efficiency was low (0.02 g N m(-2) month(-1)) beneath the farm. Benthic biofilters aggregated demersal wild fish around and within them. Pelagic wild fish also frequently used the biofilters beneath the farm, forming compact shoals around them. The increased complexity of the habitat below the fish farm enhanced biodiversity, but this improvement did not lead to the recovery of the sediments around the biofilters.
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Affiliation(s)
- F Aguado-Giménez
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Estación de Acuicultura Marina, Puerto de San Pedro del Pinatar, 30740 Murcia, Spain.
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Sousa D, Llinares P, Meijide H, Gutiérrez JM, Miguez E, Sánchez E, Castelo L, Mena A. Clinical experience with linezolid for the treatment of neurosurgical infections. Rev Esp Quimioter 2011; 24:42-47. [PMID: 21412669] [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: 05/30/2023]
Abstract
OBJECTIVES We sought to evaluate the clinical use of linezolid for the treatment of neurosurgical infections. METHODS Retrospective observational study of a cohort of hospitalized patients who received linezolid for a culture-positive neurosurgical infection from July 2004 to February 2009 in a tertiary hospital in Spain. RESULTS Seventeen patients were included in the study. Main comorbidities among these patients included one or more of the following: subarachnoidal or intraventricular hemorrhage (n=8), solid neurological cancer (n=7), corticosteroids(n=9) and hydrocephalus (n=6). Eight patients underwent a craniotomy and fourteen patients had an external ventricular drainage (EVD) as predisposing factors for infection. Meningitis was the most common infection (11; 64.7%), followed by ventriculitis (4; 23.5%) and brain abscesses (2;11.8%). The main causative organisms were coagulase-negative Staphylococcus spp. (13; 76.5%). Linezolid was used as the initial therapy in 8 episodes, after therapy failure in 6 and for other reasons in 3. The oral route was used in 9 (52.9%) episodes; linezolid was initiated orally in 2 cases. The mean duration of treatment was 26.5 days (range 15-58). No adverse events were reported. Sixteen (94.1%) patients were considered cured.There was one recurrence. The mean length of hospital stay was 45.6 (range 15-112) days and the mean duration of follow-up was 7.2 (range 0.4-32) months. No related deaths occurred during active episodes. CONCLUSIONS Linezolid was mainly indicated in post-neurosurgical EVD-associated infections due to coagulase-negative Staphylococcus spp. It was used as initial therapy in most cases. A high rate of clinical cure was observed and no related adverse events were reported. More than half of the patients were benefited by the advantages of the oral route of administration.
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Affiliation(s)
- D Sousa
- Division of Infectious Diseases, Complejo Hospitalario Universitario A Coruña, Spain.
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Fernandes I, Assumpção GG, Silveira CRF, Faquim-Mauro EL, Tanjoni I, Carmona AK, Alves MFM, Takehara HA, Rucavado A, Ramos OHP, Moura-da-Silva AM, Gutiérrez JM. Immunochemical and biological characterization of monoclonal antibodies against BaP1, a metalloproteinase from Bothrops asper snake venom. Toxicon 2010; 56:1059-65. [PMID: 20674587 DOI: 10.1016/j.toxicon.2010.07.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 07/19/2010] [Accepted: 07/22/2010] [Indexed: 11/27/2022]
Abstract
BaP1 is a P-I class of Snake Venom Metalloproteinase (SVMP) relevant in the local tissue damage associated with envenomations by Bothrops asper, a medically-important species in Central America and parts of South America. Six monoclonal antibodies (MoAb) against BaP1 (MABaP1) were produced and characterized regarding their isotype, dissociation constant (K(d)), specificity and ability to neutralize BaP1-induced hemorrhagic and proteolytic activity. Two MABaP1 are IgM, three are IgG1 and one is IgG2b. The K(d)s of IgG MoAbs were in the nM range. All IgG MoAbs recognized conformational epitopes of BaP1 and B. asper venom components but failed to recognize venoms from 27 species of Viperidae, Colubridae and Elapidae families. Clone 7 cross-reacted with three P-I SVMPs tested (moojeni protease, insularinase and neuwiedase). BaP1-induced hemorrhage was totally neutralized by clones 3, 6 and 8 but not by clone 7. Inhibition of BaP1 enzymatic activity on a synthetic substrate by MABaP1 was totally achieved by clones 3 and 6, and partially by clone 8, but not by clone 7. In conclusion, these neutralizing MoAbs against BaP1 may become important tools to understand structure-function relationships of BaP1 and the role of P-I class SVMP in snakebite envenomation.
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Affiliation(s)
- I Fernandes
- Laboratório de Imunopatologia, Instituto Butantan, Av. Vital Brazil, 1500, Butantã, CEP 05503-900, São Paulo, SP, Brazil
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Mimendia A, Gutiérrez JM, Opalski LJ, Ciosek P, Wróblewski W, del Valle M. SIA system employing the transient response from a potentiometric sensor array--Correction of a saline matrix effect. Talanta 2010; 82:931-8. [PMID: 20678648 DOI: 10.1016/j.talanta.2010.05.061] [Citation(s) in RCA: 15] [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] [Received: 12/21/2009] [Revised: 05/19/2010] [Accepted: 05/30/2010] [Indexed: 11/24/2022]
Abstract
A Sequential Injection Analysis (SIA) system and an 8-potentiometric all-solid-state sensor array were coupled in a simple and automated electronic tongue device. The potentiometric sensors used were planar microfabricated structures with standard PVC membranes deposited onto a gold contact. The SIA system permitted the automated operation and generation of the calibration data, needed to build an Artificial Neural Network model, thanks to the precise dosing and mixing of volumes of stock solutions. The resolution of a four-ion mixture, i.e. ammonium, sodium, nitrate and chloride was the study case used for characterization of the system. Two different variants for signal acquisition, steady-state and transient recording, were arranged and compared. The dynamic treatment is shown to offer improved performance thanks to the benefits of the kinetic resolution. For this, it first extracts meaningful data from a FFT transform of each sensor's transient, which is then fed to an ANN model for estimation of each concentration in the four-ion mixture. While in a standard laboratory situation there was no difference between the two approaches, the dynamic treatment allowed the correction of a matrix effect in the case study, where an uncontrolled saline effect could be counterbalanced.
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Affiliation(s)
- A Mimendia
- Grup de Sensors i Biosensors, Dep.Química, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Catalonia, Spain
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Vélez PE, Garreta LE, Martínez E, Díaz N, Amador S, Tischer I, Gutiérrez JM, Moreno PA. The Caenorhabditis elegans genome: a multifractal analysis. Genet Mol Res 2010; 9:949-65. [PMID: 20506082 DOI: 10.4238/vol9-2gmr756] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The Caenorhabditis elegans genome has several regular and irregular characteristics in its nucleotide composition; these are observed within and between chromosomes. To study these particularities, we carried out a multifractal analysis, which requires a large number of exponents to characterize scaling properties. We looked for a relationship between the genetic information content of the chromosomes and multifractal parameters and found less multifractality compared to the human genome. Differences in multifractality among chromosomes and in regions of chromosomes, and two group averages of chromosome regions were observed. All these differences were mainly dependent on differences in the contents of repetitive DNA. Based on these properties, we propose a nonlinear model for the structure of the C. elegans genome, with some biological implications. These results suggest that examining differences in multifractality is a viable approach for measuring local variations of genomic information contents along chromosomes. This approach could be extended to other genomes in order to characterize structural and functional regions of chromosomes.
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Affiliation(s)
- P E Vélez
- Departamento de Biología, Universidad del Cauca, Popayán, Colombia
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Solè I, Pey CM, Maestro A, González C, Porras M, Solans C, Gutiérrez JM. Nano-emulsions prepared by the phase inversion composition method: Preparation variables and scale up. J Colloid Interface Sci 2010; 344:417-23. [DOI: 10.1016/j.jcis.2009.11.046] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Revised: 11/18/2009] [Accepted: 11/19/2009] [Indexed: 11/13/2022]
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Solè I, Maestro A, González C, Solans C, Gutiérrez JM. Corrigendum to “Influence of the phase behavior on the properties of ionic nanoemulsions prepared by the phase inversion composition method” [J. Colloid Interface Sci. 327 (2008) 433–439]. J Colloid Interface Sci 2009. [DOI: 10.1016/j.jcis.2008.07.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Fernandes CM, de Fátima Pereira Teixeira C, Leite ACRM, Gutiérrez JM, Rocha FAC. The snake venom metalloproteinase BaP1 induces joint hypernociception through TNF-alpha and PGE2-dependent mechanisms. Br J Pharmacol 2007; 151:1254-61. [PMID: 17592506 PMCID: PMC2189826 DOI: 10.1038/sj.bjp.0707351] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND AND PURPOSE Matrix metalloproteinases (MMPs) have been implicated in joint tissue destruction in arthritis. However, MMPs have not been assigned a role in joint pain. We investigated the ability of BaP1, a metalloproteinase from Bothrops asper snake venom, with structural homology to MMPs, to induce joint hypernociception. EXPERIMENTAL APPROACH Animals received intra-articular (i.art.) BaP1. Hypernociception was assessed using the rat-knee joint articular incapacitation test. Cell influx, prostaglandin E(2) (PGE(2)), and TNF-alpha levels were assessed in joint exudates following BaP1 injection. KEY RESULTS BaP1 (5 microg per joint) provoked hypernociception between 1 and 6 h after i.art. injection. Cell influx, mostly neutrophils, was maximal 3 h after BaP1 i.art. injection. BaP1 also led to increase in PGE(2) and TNF-alpha levels in the joint exudates. Pretreatment with either indomethacin (4 mg.kg(-1) i.p.) or with an anti-TNF-alpha antiserum (i.art.) significantly inhibited both BaP1-induced joint hypernociception and cell influx. In isolated rat peritoneal macrophages, BaP1 increased cyclooxygenase (COX)-2 expression, while not altering that of COX-1. CONCLUSIONS AND IMPLICATIONS This is the first demonstration that a metalloproteinase promotes joint hypernociception. This effect involves local release of PGE(2) and TNF-alpha. BaP1-induced increase in PGE(2) is associated to increased COX-2 expression in macrophages. Blocking PGE(2) or TNF-alpha inhibits BaP1-induced hypernociception. In addition to unravelling a hitherto unknown mechanism whereby TNF blockade provides analgesia in arthritis, the data show, for the first time that MMPs are involved in inflammatory joint hypernociception and induce COX-2 expression.
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Affiliation(s)
- C M Fernandes
- Laboratório de Farmacologia – Instituto Butantan São Paulo, Brazil
| | | | - A C R M Leite
- Departamento de Medicina Clínica, Faculdade de Medicina, Universidade Federal do Ceará Ceará, Brazil
| | - J M Gutiérrez
- Universidad de Costa Rica, Costa Rica San José, Costa Rica
| | - F A C Rocha
- Departamento de Medicina Clínica, Faculdade de Medicina, Universidade Federal do Ceará Ceará, Brazil
- Author for correspondence:
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Primo C, Szendro IG, Rodríguez MA, Gutiérrez JM. Error growth patterns in systems with spatial chaos: from coupled map lattices to global weather models. Phys Rev Lett 2007; 98:108501. [PMID: 17358577 DOI: 10.1103/physrevlett.98.108501] [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] [Subscribe] [Scholar Register] [Received: 08/30/2006] [Indexed: 05/14/2023]
Abstract
Error growth in spatiotemporal chaotic systems is investigated by analyzing the interplay between temporal and spatial dynamics. The spatial correlation and localization of relative fluctuations grow and decay indicating two different regimes, before and after saturation by nonlinear effects. This general behavior is shown to hold both in simple coupled map lattices and in global weather models. This explains the increasing or decreasing trends previously observed in the exponential growth rate of these spatiotemporal systems.
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Affiliation(s)
- C Primo
- Department of Meteorology, University of Reading, Earley Gate, Reading RG6 6BB, UK
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Kunieda H, Shrestha LK, Acharya DP, Kato H, Takase Y, Gutiérrez JM. Super‐Stable Nonaqueous Foams in Diglycerol Fatty Acid Esters—Non Polar Oil Systems. J DISPER SCI TECHNOL 2007. [DOI: 10.1080/01932690600992779] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Solè I, Maestro A, Gonzalez C, Solans C, Gutiérrez JM. Optimization of nano-emulsion preparation by low-energy methods in an ionic surfactant system. Langmuir 2006; 22:8326-32. [PMID: 16981744 DOI: 10.1021/la0613676] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The low-energy emulsification method Emulsion Inversion Point (EIP) was used to prepare O/W nano-emulsions in the W/potassium oleate-oleic acid-C(12)E(10)/hexadecane ionic system. This method had not practically been used in ionic systems up to now. The resulting droplet sizes, much smaller than those obtained with the high-energy emulsification methods, depend on the composition (formulation variables) and preparation variables (addition and mixing rate). Phase diagrams, rheology measurements, and experimental designs applied to nano-emulsion droplet sizes obtained were combined to study the formation of these nano-emulsions. To obtain small droplet sizes, it is necessary to cross a direct cubic liquid crystal phase along the emulsification path, and it is also crucial to remain in this phase long enough to incorporate all of the oil into the liquid crystal. When nano-emulsion forms, the oil is already intimately mixed with all of the components, and it only has to be redistributed. Results show that the smaller droplet sizes are obtained when the liquid crystal zone is wide and extends to high water content, because in this case, during the emulsification process, the system remains long enough in the liquid crystal phase to allow the incorporation of all of the oil. Around the optimal formulation variables, the liquid crystal zone crossed during emulsification is wide enough to incorporate all of the oil whatever mixing or stirring rate is used, and then the resulting droplet size is independent of preparation variables. However, when the composition is far from this optimum, the liquid crystal zone becomes narrower and the mixing of components controls the nano-emulsion formation. High agitation rates and/or low addition rates are required to ensure the dissolution of all of the oil into this phase.
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Affiliation(s)
- Isabel Solè
- Departament d'Enginyeria Química, Universitat de Barcelona, 08028 Barcelona, Spain
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Miyabara EH, Baptista IL, Lomonte B, Selistre-de-Araújo HS, Gutiérrez JM, Moriscot AS. Effect of calcineurin inhibitors on myotoxic activity of crotoxin and Bothrops asper phospholipase A2 myotoxins in vivo and in vitro. Comp Biochem Physiol C Toxicol Pharmacol 2006; 143:284-94. [PMID: 16635590 DOI: 10.1016/j.cbpc.2006.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2005] [Revised: 03/03/2006] [Accepted: 03/06/2006] [Indexed: 10/24/2022]
Abstract
Previous studies have shown that calcineurin activity plays a critical role in the myotoxic activity induced by crotoxin (CTX), a group II phospholipase A(2) (PLA(2)) with neurotoxic and myotoxic actions. In order to address whether calcineurin is also important for the activity of non-neurotoxic group II PLA(2) myotoxins we have compared the effects of calcineurin inhibition on the myotoxic capacity of CTX and the non-neurotoxic PLA(2)s, myotoxin II (Mt II) and myotoxin III (Mt III) from Bothrops asper venom. Rats were treated with cyclosporin A (CsA) or FK506, calcineurin inhibitors, and received an intramuscular injection of either CTX, Mt II or Mt III into the tibialis anterior. Animals were killed 24 h after injection of toxins. Tibialis anterior was removed and stored in liquid nitrogen. Myofibers in culture were also treated with CsA or FK506 and exposed to CTX, Mt II and Mt III. It was observed that, in contrast to CTX, CsA and FK506 do not attenuate myotoxic effects induced by both Mt II and Mt III in vivo and in vitro. The results of the present study suggest that calcineurin is not essential for the myotoxic activity of Mt II and Mt III, indicating that distinct intracellular pathways might be involved in myonecrosis induced by neurotoxic CTX and non-neurotoxic Bothrops sp. PLA(2) myotoxins. Alternatively, calcineurin dependent fast fiber type shift might render the muscle resistant to the action of CTX, without affecting its susceptibility to Bothrops sp. myotoxins.
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Affiliation(s)
- E H Miyabara
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, Av Lineu Prestes 1524, São Paulo, 05508-900, SP, Brazil
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Chaves F, Teixeira CFP, Gutiérrez JM. Role of nitric oxide in the local and systemic pathophysiological effects induced by Bothrops asper snake venom in mice. Inflamm Res 2006; 55:245-53. [PMID: 16955244 DOI: 10.1007/s00011-006-0078-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVE To assess the role of nitric oxide in the most relevant local and systemic manifestations in mice injected with the venom of the snake Bothrops asper. Mice were pretreated with nitric oxide synthase inhibitors, and the modifications of the pathological effects induced by the venom were tested. RESULTS Inhibition of NO synthesis did not affect acute local myonecrosis and hemorrhage in muscle tissue upon intramuscular injection of venom. Local footpad edema was reduced in mice pretreated with the NO synthase inhibitor L-NAME, and a reduction in the extent of inflammatory infiltrate in muscle tissue was observed after envenomation in mice pretreated with L-NAME and aminoguanidine. The most pronounced effect of NOS inhibition by L-NAME was an increment in the lethal activity of the venom, when injected by the intraperitoneal route. CONCLUSION Nitric oxide does not seem to play a significant role in the local acute pathological alterations (hemorrhage and myonecrosis) induced by B. asper venom in mice, although it contributes to edema and inflammatory infiltrate. Nitric oxide exerts a protective role in the systemic pathophysiological manifestations leading to lethality.
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Affiliation(s)
- F Chaves
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
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Morales D, Solans C, Gutiérrez JM, Garcia-Celma MJ, Olsson U. Oil/water droplet formation by temperature change in the water/c(16)e(6)/mineral oil system. Langmuir 2006; 22:3014-20. [PMID: 16548551 DOI: 10.1021/la052324c] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Droplet sizes of oil/water (O/W) nanoemulsions prepared by the phase inversion temperature (PIT) method, in the water/C16E6/mineral oil system, have been compared with those given by a theoretical droplet model, which predicts a minimum droplet size. The results show that, when the phase inversion was started from either a single-phase microemulsion (D) or a two-phase W+D equilibrium, the resulting droplet sizes were close to those predicted by the model, whereas, when emulsification was started from W+D+O or from W+D+Lalpha (Lalpha = lamellar liquid crystal) equilibria, the difference between the measured and predicted values was much higher. The structural changes produced during the phase inversion process have been investigated by the 1H-PFGSE-NMR technique, monitoring the self-diffusion coefficients for each component as a function of temperature. The results have confirmed the transition from a bicontinuous D microemulsion at the hydrophile-lipophile balance (HLB) temperature to oil nanodroplet dispersion in water when it is cooled to lower temperatures.
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Affiliation(s)
- D Morales
- Institut d' Investigacions Químiques i Ambientals de Barcelona (IIQAB), Consell Superior d' Investigacions Científiques (CSIC), Jordi Girona, 18-36 Barcelona 08034 Spain
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Acharya DP, Gutiérrez JM, Aramaki K, Aratani KI, Kunieda H. Interfacial properties and foam stability effect of novel gemini-type surfactants in aqueous solutions. J Colloid Interface Sci 2005; 291:236-43. [PMID: 16154135 DOI: 10.1016/j.jcis.2005.04.105] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2005] [Revised: 04/26/2005] [Accepted: 04/28/2005] [Indexed: 11/18/2022]
Abstract
Static and dynamic surface tension and interfacial rheological behavior of a novel anionic gemini-type surfactant without a spacer group, sodium 2,3-didodecyl-1,2,3,4-butane tetracarboxylate (GS), were investigated. Very low values for critical micelle concentration (8.9x10(-5) M) as well as equilibrium surface tension (22.7 mN m(-1)) were observed for the aqueous solutions. Dynamic surface tension (DST) is very slow and less sensitive to the surfactant concentration than the conventional monomeric surfactant, suggesting the presence of a significant adsorption barrier for GS owing to a complicated molecular structure. Presence of a small concentration of GS in sodium dodecyl sulfate (SDS) solution shows a synergistic effect to form mixed micelles and lowers the cmc considerably. This synergism between GS and SDS and slow exchange of GS between bulk and interface create a rigid air-liquid interface of the SDS-GS solution, which is reflected in a higher elasticity value for the interface of the SDS-GS solution than for the SDS solution. It has been found that the presence of a small concentration of GS in SDS solution increases the foam stability noticeably. Although the stability of the wet foam is correlated with the film elasticity, the stability of dry foam cannot be explained in terms of film elasticity alone.
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Affiliation(s)
- Durga P Acharya
- Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai 79-7, Hodogaya-ku, Yokohama 240-8501, Japan
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Ciszak M, Gutiérrez JM, Cofiño AS, Mirasso C, Toral R, Pesquera L, Ortín S. Approach to predictability via anticipated synchronization. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 72:046218. [PMID: 16383523 DOI: 10.1103/physreve.72.046218] [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] [Subscribe] [Scholar Register] [Received: 04/21/2005] [Indexed: 05/05/2023]
Abstract
Predictability of chaotic systems is limited, in addition to the precision of the knowledge of the initial conditions, by the error of the models used to extract the nonlinear dynamics from the time series. In this paper, we analyze the predictions obtained from the anticipated synchronization scheme using a chain of slave neural network approximate replicas of the master system. We compare the maximum prediction horizons obtained with those attainable using standard prediction techniques.
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Affiliation(s)
- M Ciszak
- Department of Physics, University of Balearic Islands, E-07122 Palma de Mallorca, Spain.
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