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Nemali A, Vockert N, Berron D, Maas A, Bernal J, Yakupov R, Peters O, Gref D, Cosma N, Preis L, Priller J, Spruth E, Altenstein S, Lohse A, Fliessbach K, Kimmich O, Vogt I, Wiltfang J, Hansen N, Bartels C, Schott BH, Maier F, Meiberth D, Glanz W, Incesoy E, Butryn M, Buerger K, Janowitz D, Pernecky R, Rauchmann B, Burow L, Teipel S, Kilimann I, Göerß D, Dyrba M, Laske C, Munk M, Sanzenbacher C, Müller S, Spottke A, Roy N, Heneka M, Brosseron F, Roeske S, Dobisch L, Ramirez A, Ewers M, Dechent P, Scheffler K, Kleineidam L, Wolfsgruber S, Wagner M, Jessen F, Duzel E, Ziegler G. Gaussian Process-based prediction of memory performance and biomarker status in ageing and Alzheimer's disease-A systematic model evaluation. Med Image Anal 2023; 90:102913. [PMID: 37660483 DOI: 10.1016/j.media.2023.102913] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/28/2023] [Accepted: 07/25/2023] [Indexed: 09/05/2023]
Abstract
Neuroimaging markers based on Magnetic Resonance Imaging (MRI) combined with various other measures (such as genetic covariates, biomarkers, vascular risk factors, neuropsychological tests etc.) might provide useful predictions of clinical outcomes during the progression towards Alzheimer's disease (AD). The use of multiple features in predictive frameworks for clinical outcomes has become increasingly prevalent in AD research. However, many studies do not focus on systematically and accurately evaluating combinations of multiple input features. Hence, the aim of the present work is to explore and assess optimal combinations of various features for MR-based prediction of (1) cognitive status and (2) biomarker positivity with a multi-kernel learning Gaussian process framework. The explored features and parameters included (A) combinations of brain tissues, modulation, smoothing, and image resolution; (B) incorporating demographics & clinical covariates; (C) the impact of the size of the training data set; (D) the influence of dimensionality reduction and the choice of kernel types. The approach was tested in a large German cohort including 959 subjects from the multicentric longitudinal study of cognitive impairment and dementia (DELCODE). Our evaluation suggests the best prediction of memory performance was obtained for a combination of neuroimaging markers, demographics, genetic information (ApoE4) and CSF biomarkers explaining 57% of outcome variance in out-of-sample predictions. The highest performance for Aβ42/40 status classification was achieved for a combination of demographics, ApoE4, and a memory score while usage of structural MRI further improved the classification of individual patient's pTau status.
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Affiliation(s)
- A Nemali
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany.
| | - N Vockert
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - D Berron
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - A Maas
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - J Bernal
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - R Yakupov
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - O Peters
- German Center for Neurodegenerative Diseases (DZNE), Berlin, Germany; Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Department of Psychiatry, Hindenburgdamm 30, 12203, Berlin, Germany
| | - D Gref
- Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Department of Psychiatry, Hindenburgdamm 30, 12203, Berlin, Germany
| | - N Cosma
- Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Department of Psychiatry, Hindenburgdamm 30, 12203, Berlin, Germany
| | - L Preis
- Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Department of Psychiatry, Hindenburgdamm 30, 12203, Berlin, Germany
| | - J Priller
- German Center for Neurodegenerative Diseases (DZNE), Berlin, Germany; Department of Psychiatry and Psychotherapy, Charité, Charitéplatz 1, 10117 Berlin, Germany; School of Medicine, Technical University of Munich; Department of Psychiatry and Psychotherapy, Munich, Germany; University of Edinburgh and UK DRI, Edinburgh, UK
| | - E Spruth
- German Center for Neurodegenerative Diseases (DZNE), Berlin, Germany; Department of Psychiatry and Psychotherapy, Charité, Charitéplatz 1, 10117 Berlin, Germany
| | - S Altenstein
- German Center for Neurodegenerative Diseases (DZNE), Berlin, Germany; Department of Psychiatry and Psychotherapy, Charité, Charitéplatz 1, 10117 Berlin, Germany
| | - A Lohse
- Department of Psychiatry and Psychotherapy, Charité, Charitéplatz 1, 10117 Berlin, Germany
| | - K Fliessbach
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; University of Bonn Medical Center, Department of Neurodegenerative Disease and Geriatric Psychiatry/Psychiatry, Venusberg-Campus 1, 53127 Bonn, Germany
| | - O Kimmich
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - I Vogt
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - J Wiltfang
- German Center for Neurodegenerative Diseases (DZNE), Goettingen, Germany; Department of Psychiatry and Psychotherapy, University Medical Center Goettingen, University of Goettingen, Von-Siebold-Str. 5, 37075 Goettingen, Germany; Neurosciences and Signaling Group, Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - N Hansen
- Department of Psychiatry and Psychotherapy, University Medical Center Goettingen, University of Goettingen, Von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - C Bartels
- Department of Psychiatry and Psychotherapy, University Medical Center Goettingen, University of Goettingen, Von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - B H Schott
- Leibniz Institute for Neurobiology, Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE), Goettingen, Germany; Department of Psychiatry and Psychotherapy, University Medical Center Goettingen, University of Goettingen, Von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - F Maier
- Department of Psychiatry, University of Cologne, Medical Faculty, Kerpener Strasse 62, 50924 Cologne, Germany
| | - D Meiberth
- Department of Psychiatry, University of Cologne, Medical Faculty, Kerpener Strasse 62, 50924 Cologne, Germany
| | - W Glanz
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany
| | - E Incesoy
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - M Butryn
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - K Buerger
- German Center for Neurodegenerative Diseases (DZNE, Munich), Feodor-Lynen-Strasse 17, 81377 Munich, Germany; Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Feodor-Lynen-Strasse 17, 81377 Munich, Germany
| | - D Janowitz
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Feodor-Lynen-Strasse 17, 81377 Munich, Germany
| | - R Pernecky
- German Center for Neurodegenerative Diseases (DZNE, Munich), Feodor-Lynen-Strasse 17, 81377 Munich, Germany; Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy) Munich, Munich, Germany; Ageing Epidemiology Research Unit (AGE), School of Public Health, Imperial College London, London, UK
| | - B Rauchmann
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - L Burow
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - S Teipel
- German Center for Neurodegenerative Diseases (DZNE), Rostock, Germany; Department of Psychosomatic Medicine, Rostock University Medical Center, Gehlsheimer Str. 20, 18147 Rostock, Germany
| | - I Kilimann
- German Center for Neurodegenerative Diseases (DZNE), Rostock, Germany; Department of Psychosomatic Medicine, Rostock University Medical Center, Gehlsheimer Str. 20, 18147 Rostock, Germany
| | - D Göerß
- Department of Psychosomatic Medicine, Rostock University Medical Center, Gehlsheimer Str. 20, 18147 Rostock, Germany
| | - M Dyrba
- German Center for Neurodegenerative Diseases (DZNE), Rostock, Germany
| | - C Laske
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany; Section for Dementia Research, Hertie Institute for Clinical Brain Research and Department of Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany
| | - M Munk
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany; Department of Psychiatry and Psychotherapy, University of Tuebingen, Tuebingen, Germany
| | - C Sanzenbacher
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - S Müller
- Department of Psychiatry and Psychotherapy, University of Tuebingen, Tuebingen, Germany
| | - A Spottke
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; Department of Neurology, University of Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - N Roy
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - M Heneka
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; Department of Psychiatry and Psychotherapy, University of Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - F Brosseron
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - S Roeske
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
| | - L Dobisch
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - A Ramirez
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; Department of Neurology, University of Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Köln, Germany; Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany; Department of Psychiatry & Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX, USA
| | - M Ewers
- German Center for Neurodegenerative Diseases (DZNE, Munich), Feodor-Lynen-Strasse 17, 81377 Munich, Germany; Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Feodor-Lynen-Strasse 17, 81377 Munich, Germany
| | - P Dechent
- MR-Research in Neurosciences, Department of Cognitive Neurology, Georg-August-University Goettingen, Germany
| | - K Scheffler
- Department for Biomedical Magnetic Resonance, University of Tübingen, 72076 Tübingen, Germany
| | - L Kleineidam
- University of Bonn Medical Center, Department of Neurodegenerative Disease and Geriatric Psychiatry/Psychiatry, Venusberg-Campus 1, 53127 Bonn, Germany
| | - S Wolfsgruber
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; University of Bonn Medical Center, Department of Neurodegenerative Disease and Geriatric Psychiatry/Psychiatry, Venusberg-Campus 1, 53127 Bonn, Germany
| | - M Wagner
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; University of Bonn Medical Center, Department of Neurodegenerative Disease and Geriatric Psychiatry/Psychiatry, Venusberg-Campus 1, 53127 Bonn, Germany
| | - F Jessen
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Venusberg-Campus 1, 53127 Bonn, Germany; Department of Psychiatry, University of Cologne, Medical Faculty, Kerpener Strasse 62, 50924 Cologne, Germany; Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph-Stelzmann-Strasse 26, 50931 Köln, Germany
| | - E Duzel
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - G Ziegler
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
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Tryfonyuk L, Castro A, Bernal J, Iatsyna O, Martins F. Outcomes of primary surgical treatment in advanced peyronie’s disease: A multi-institutional study. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00877-1] [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: 02/12/2023]
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Tryfonyuk L, Shcheglovska T, Milinevsky V, Maksymjak G, Bernal J, Yatsyna O, Martins F. Practical approach and surgical outcome to treatment rectourinary fistula in male cancer patients. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02599-x] [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: 11/11/2022] Open
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Moreno-Manuel A, Macias A, Cruz FM, Gutierrez L, Martinez Carrascoso I, Bermudez-Jimenez FJ, Vera-Pedrosa ML, Sanchez-Perez P, Bernal J, Jalife J. Atrial-specific reduction of Kir2.1 channel pore diameter in addition to loss of inward-going rectification underlies inducible atrial fibrillation in a mouse model of short QT syndrome type 3. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Short QT Syndrome Type 3 (SQTS3) is an extremely rare arrhythmogenic disease caused by gain-of-function mutations in the KCNJ2 gene coding the inward rectifier potassium channel Kir2.1. We investigated arrhythmogenic mechanisms associated with a de-novo mutation (E299V) in Kir2.1 in an 11-year-old boy presenting an extremely abbreviated QT interval, paroxysmal atrial fibrillation, and mild left ventricular dysfunction. Amino acid E299 in the Kir2.1 sequence is necessary for polyamine binding induced inward rectification.
Purpose
Test the hypothesis that Kir2.1E299V induces reduced conductance and lack of rectification that causes electrical defects in atrial cardiomyocytes, predisposing patients to atrial arrhythmias.
Methods
We used intravenous adeno-associated virus-mediated gene transfer to generate mice expressing wild-type (WT) and the E299V mutant protein. We used ECG, intracardiac stimulation, patch-clamp, molecular biology and computational modelling to characterize the models and study arrhythmia mechanisms in the atria and ventricles.
Results
We confirmed WT or mutant Kir2.1 gene expression specifically in the mouse heart. On ECG, the corrected QT (QTc) interval of Kir2.1E299V mice was significantly shorter than Kir2.1WT mice (p<0.0001). The PR interval in Kir2.1E299V was also significantly shorter than WT mice (p<0.0001). On intracardiac stimulation, the largest proportion of arrhythmic events occurred in the atria, as 7 out of 9 Kir2.1E299V mice presented >1 second atrial flutter/fibrillation, while only 2 out of 10 Kir2.1WT mice showed this type of arrhythmia (p=0.023). On patch clamping, both atrial and ventricular cardiomyocytes expressing Kir2.1E299V had extremely abbreviated action potential durations (APD90) at all frequencies studied (p<0.0001). The current/voltage relation of ventricular Kir2.1E299V cardiomyocytes revealed an absence of inward-going rectification and increased IK1 at voltages positive to −80 mV compared to Kir2.1WT cardiomyocytes (p<0.0001). In contrast, while in the atrial Kir2.1E299V cardiomyocytes the outward IK1 was increased at voltages positive to −80 mV with loss of rectification, IK1 was significantly reduced at voltages negative to −80 mV (p<0.0001), suggesting a loss of function leading to atrial arrhythmia inducibility. A higher proportion of Kir2.2 at atrial level and atomic in-silico 3D simulations suggested that the mutation impaired polyamine block of the Kir2.1E299V-Kir2.2 channel while reducing the pore diameter.
Conclusions
This first in-vivo mouse model of cardiac-specific SQTS3 recapitulates the electrophysiological phenotype of a patient with the Kir2.1E299V mutation. The mutation results in a Kir2.1 gain-of-function mediated by and absence of rectification. The predominant arrhythmias induced in these SQTS3 mice were supraventricular likely due to the combined lack of inward rectification and atrial-specific reduced pore diameter of the Kir2.1E299V-Kir2.2 channel.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): La Caixa FoundationLa Maratό TV3 Foundation
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Affiliation(s)
- A Moreno-Manuel
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - A Macias
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - F M Cruz
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - L Gutierrez
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | | | - F J Bermudez-Jimenez
- University Hospital Virgen de las Nieves, Family Heart Disease and Cardiovascular Genetics , Granada , Spain
| | - M L Vera-Pedrosa
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - P Sanchez-Perez
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - J Bernal
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - J Jalife
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
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Ares S, Saenz-Rico B, Arnaez J, Diez-Sebastian J, Omeñaca F, Bernal J. Effects of oral iodine supplementation in very low birth weight preterm infants for the prevention of thyroid function alterations during the neonatal period: results of a randomised assessor-blinded pilot trial and neurodevelopmental outcomes at 24 months. Eur J Pediatr 2022; 181:959-972. [PMID: 34651206 DOI: 10.1007/s00431-021-04288-5] [Citation(s) in RCA: 1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 10/02/2021] [Accepted: 10/04/2021] [Indexed: 12/21/2022]
Abstract
The trace element iodine (I) is essential for the synthesis of thyroid hormones. Parenteral nutrition solutions, formula milk, and human breast milk contain insufficient iodine to meet recommended intake for preterm infants. Iodine deficiency may affect thyroid function and may be associated with morbidity or neurological outcomes. The primary objective is to assess the evidence that dietary supplementation with iodine affects thyroid function during the neonatal period. The design was a randomised controlled pilot trial. Infants who met the inclusion criteria were enrolled through consecutive sampling and assigned to two different groups. The setting was a Spanish university hospital. Ninety-four patients with very low birth weight (under 1500 g) were included. Intervention group: 30 µg I/kg/day of iodine in oral drops given to 47 infants from their first day of life until hospital discharge. Control group: 47 infants without supplements. Formula and maternal milk samples for the determination of iodine content were collected at 1, 7, 15, 21, 30 days, and at discharge. Blood samples were collected for thyroid hormones. Neurological development was assessed at 2 years of age (Bayley III Test). Infants in the supplemented group reached the recommended levels from the first days of life. The researchers detected the effects of iodine balance on the plasma levels of thyroid hormones measured during the first 12 weeks of age. The trial assessed the impact of the intervention on neurodevelopmental morbidity.Conclusion: Thyroid function is related to iodine intake in preterm infants. Therefore, supplements should be added if iodine intake is found to be inadequate. The analyses found no effects of iodine supplementation on the composite scores for Bayley-III assessments in all major domains. The study results indicate potentially important effects on language development related to low iodine excretion during the first 4 weeks of life What is Known: • Thyroid function is related to iodine intake in preterm infants. • Preterm babies on formula preparations and with exclusive parenteral nutrition are at high risk of iodine deficiency. What is New: • Iodine intake should be monitored during the neonatal period. • Iodine supplements should be added if iodine intake is found to be inadequate.
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Affiliation(s)
- S Ares
- Neonatology Unit, University Hospital LA PAZ, Paseo de la Castellana 261, 28046, Madrid, Spain.
| | - B Saenz-Rico
- Facultad de Educacion, Universidad Complutense, Madrid, Spain
| | - J Arnaez
- Neonatology Unit, Hospital Universitario de Burgos, Burgos, Spain
| | - J Diez-Sebastian
- Biostatistics Department, University Hospital LA PAZ, Paseo de la Castellana 261, 28046, Madrid, Spain
| | - F Omeñaca
- Neonatology Unit, University Hospital LA PAZ, Paseo de la Castellana 261, 28046, Madrid, Spain
| | - J Bernal
- Instituto de Investigaciones Biomédicas, Universidad Autónoma de Madrid, Arturo Duperier 4, Madrid, Spain.,Center for Research On Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
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Rivas-García S, Bernal J, Bachiller-Corral J. Rhabdomyolysis as the main manifestation of coronavirus disease 2019. Rheumatology (Oxford) 2020; 59:2174-2176. [PMID: 32584414 PMCID: PMC7337803 DOI: 10.1093/rheumatology/keaa351] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/17/2020] [Accepted: 05/18/2020] [Indexed: 12/18/2022] Open
Affiliation(s)
| | - J Bernal
- Internal Medicine Department, Madrid, Spain
| | - J Bachiller-Corral
- Rheumatology Department, Madrid, Spain.,Instituto Ramón y Cajal de Investigación Sanitaria, Hospital Universitario Ramón y Cajal, Madrid, Spain
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Esparza-González SC, Sánchez-Valdés S, Ramírez-Barrón SN, Loera-Arias MJ, Bernal J, Meléndez-Ortiz HI, Betancourt-Galindo R. Effects of different surface modifying agents on the cytotoxic and antimicrobial properties of ZnO nanoparticles. Toxicol In Vitro 2016; 37:134-141. [PMID: 27666655 DOI: 10.1016/j.tiv.2016.09.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [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: 04/15/2016] [Revised: 08/23/2016] [Accepted: 09/21/2016] [Indexed: 02/06/2023]
Abstract
Zinc oxide (ZnO) nanoparticles (NPs) have received considerable attention in the medical field because of their antibacterial properties, primarily for killing and reducing the activity of numerous microorganisms. The purpose of this study was to determine whether surface-modified ZnO NPs exhibit different properties compared with unmodified ZnO. The antimicrobial and cytotoxic properties of modified ZnO NPs as well as their effects on inflammatory cytokine production were evaluated. ZnO NPs were prepared using a wet chemical method. Then, the surfaces of these NPs were modified using 3-aminopropyltriethoxysilane (APTES) and dimethyl sulfoxide (DMSO) as modifying agents via a chemical hydrolysis method. According to infrared spectroscopy analysis (FTIR), the structure of the ZnO remained unchanged after modification. Antibacterial assays demonstrated that APTES modification is more effective at inducing an antimicrobial effect against Gram-negative bacteria than against Gram-positive bacteria. Cytotoxicity studies showed that cell viability was dose-dependent; moreover, pristine and APTES-modified ZnO exhibited low cytotoxicity, whereas DMSO-modified ZnO exhibited toxicity even at a low NP concentration. An investigation of inflammatory cytokine production demonstrated that the extent of stimulation was related to the ZnO NP concentration but not to the surface modification, except for IFN-γ and IL-10, which were not detected even at high NP concentrations.
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Affiliation(s)
- S C Esparza-González
- Facultad de Medicina U.S., Universidad Autónoma de Coahuila Saltillo, Coahuila, Mexico
| | - S Sánchez-Valdés
- Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna 140, Saltillo, Coahuila 25294, Mexico
| | - S N Ramírez-Barrón
- Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna 140, Saltillo, Coahuila 25294, Mexico
| | - M J Loera-Arias
- Departamento de Histología, Facultad de Medicina UANL, Monterrey, Nuevo León, Mexico
| | - J Bernal
- Unidad Médica Ojo Caliente, Av. Ojo Caliente 901-A Aguascalientes, Ags, Mexico
| | - H Iván Meléndez-Ortiz
- CONACyT-Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna 140, Saltillo, Coahuila 25294, Mexico
| | - R Betancourt-Galindo
- Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna 140, Saltillo, Coahuila 25294, Mexico.
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Rubio E, Nuño J, Brandariz L, Domínguez I, Bernal J, Vivas A, Alonso O, González S, Pelaez P, Perea J, Garcia Borda J, Ferrero E. 465. Surgical aggressive treatment of primary and liver metastases of neuroendocrine tumors. Eur J Surg Oncol 2016. [DOI: 10.1016/j.ejso.2016.06.293] [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: 11/29/2022] Open
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Herrera J, Sánchez R, Bernal J, López A, Rivera JG, Guzmán A, Ávalos A. Actividad reproductiva después del anestro inducido con altrenogest en hembras de <i>Tursiops truncatus</i> en cautiverio en ambiente marino. Revista de la Facultad de Medicina Veterinaria y de Zootecnia 2015. [DOI: 10.15446/rfmvz.v62n2.51989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
<p>La necesidad de reproducir delfín nariz de botella (<em>Tursiops truncatus</em>) en cautiverio se ha incrementado debido a las restricciones internacionales para su comercialización y por el riesgo y dificultad logística para el traslado de ejemplares. Por lo anterior, se hace importante conocer su biología reproductiva en cautiverio. El objetivo de este trabajo, fue conocer los indicadores post tratamiento con altrenogest (Regumate<sup>®</sup>), de citología vaginal, niveles de estradiol y reinicio de la actividad reproductiva en cautiverio de hembras de <em>T truncatus</em> en ambiente marino. Por un año, 12 hembras recibieron diariamente una dosis de 0,07mg kg<sup>-1</sup> de altrenogest. Se realizaron un total 420 citologías vaginales, una diaria de cada hembra, para determinar el porcentaje de células cornificadas. También se obtuvieron de la red vascular, 60 muestras sanguíneas, en las que se determinó los niveles de estradiol. En cuanto a la citología vaginal, al cuarto día de retirar la administración de altrenogest, el porcentaje total de células cornificadas incrementó del 60% a 70% hasta el día nueve y continuó ascendiendo al 80% entre los días 12 al 19. Los niveles de estradiol, presentaron un rango de 16 a 114pg ml<sup>-1</sup>. Se encontró una correlación (r = 0,7062 P<0.05) positiva entre estos indicadores. Se concluye que es posible la manipulación con altrenogest y el monitoreo del ciclo estral de las hembras mediante técnicas simples como la citología vaginal para el diseño de protocolos de reproducción asistida específicos para grupos en cautiverio de <em>T truncatus.</em></p>
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Donado-Godoy P, Castellanos R, León M, Arevalo A, Clavijo V, Bernal J, León D, Tafur MA, Byrne BA, Smith WA, Perez-Gutierrez E. The Establishment of the Colombian Integrated Program for Antimicrobial Resistance Surveillance (COIPARS): A Pilot Project on Poultry Farms, Slaughterhouses and Retail Market. Zoonoses Public Health 2015; 62 Suppl 1:58-69. [DOI: 10.1111/zph.12192] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Indexed: 11/28/2022]
Affiliation(s)
- P. Donado-Godoy
- Corporación Colombiana de Investigación Agropecuaria; Centro de Biotecnología y Bioindustria; Cundinamarca Colombia
| | - R. Castellanos
- Corporación Colombiana de Investigación Agropecuaria; Centro de Biotecnología y Bioindustria; Cundinamarca Colombia
| | - M. León
- Instituto Colombiano Agropecuario; Bogotá DC Colombia
| | - A. Arevalo
- Corporación Colombiana de Investigación Agropecuaria; Centro de Biotecnología y Bioindustria; Cundinamarca Colombia
| | - V. Clavijo
- Corporación Colombiana de Investigación Agropecuaria; Centro de Biotecnología y Bioindustria; Cundinamarca Colombia
| | - J. Bernal
- Corporación Colombiana de Investigación Agropecuaria; Centro de Biotecnología y Bioindustria; Cundinamarca Colombia
| | - D. León
- Corporación Colombiana de Investigación Agropecuaria; Centro de Biotecnología y Bioindustria; Cundinamarca Colombia
| | - M. A. Tafur
- Instituto Colombiano Agropecuario; Bogotá DC Colombia
| | - B. A. Byrne
- School of Veterinary Medicine; University of California; Davis CA USA
| | - W. A. Smith
- School of Veterinary Medicine; University of California; Davis CA USA
| | - E. Perez-Gutierrez
- Pan American Health Organization; Regional Office for the Americas of the World Health Organization; Washington DC USA
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Toribio L, Bernal JL, Martín MT, Bernal J, del Nozal MJ. Effects of organic modifier and temperature on the enantiomeric separation of several azole drugs using supercritical fluid chromatography and the Chiralpak AD column. Biomed Chromatogr 2013; 28:152-8. [DOI: 10.1002/bmc.3013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 07/08/2013] [Accepted: 07/09/2013] [Indexed: 11/10/2022]
Affiliation(s)
- L. Toribio
- I.U. CINQUIMA, Analytical Chemistry Group; University of Valladolid; E-47011 Valladolid Spain
| | - J. L. Bernal
- I.U. CINQUIMA, Analytical Chemistry Group; University of Valladolid; E-47011 Valladolid Spain
| | - M. T. Martín
- I.U. CINQUIMA, Analytical Chemistry Group; University of Valladolid; E-47011 Valladolid Spain
| | - J. Bernal
- I.U. CINQUIMA, Analytical Chemistry Group; University of Valladolid; E-47011 Valladolid Spain
| | - M. J. del Nozal
- I.U. CINQUIMA, Analytical Chemistry Group; University of Valladolid; E-47011 Valladolid Spain
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Arce A, Estirado A, Ordobas M, Sevilla S, García N, Moratilla L, de la Fuente S, Martínez AM, Pérez AM, Aránguez E, Iriso A, Sevillano O, Bernal J, Vilas F. Re-emergence of leishmaniasis in Spain: community outbreak in Madrid, Spain, 2009 to 2012. Euro Surveill 2013; 18:20546. [DOI: 10.2807/1560-7917.es2013.18.30.20546] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Since July 2009, there has been a community outbreak of leishmaniasis in the south-west area of the Madrid autonomous community, Spain, affecting residents from four towns that are geographically close together and share extensive park areas. As of December 2012, 446 cases were reported (6 in 2009, 97 in 2010, 196 in 2011 and 147 in 2012), a mean incidence rate of 22.2 per 100,000 inhabitants during July 2009 and December 2012. The mean age was 44 years (range: 2 months to 95 years); 61.0% were male. A total of 68 (15.2%) had immunosuppressive conditions; 160 (35.9%) had visceral leishmaniasis and 286 (64.1%) cutaneous. A total of 421 (94.4%) cases were confirmed. Leishmania infantum was identified as the agent. Monitoring revealed high densities of the vector Phlebotomus perniciosus. The surveillance system for canine leishmaniasis did not detect any increase in prevalence during the period. Environmental control measures have been taken, such as improvements in sanitation and disinsection in the risk areas and control of the overpopulation of Leporidae, as xenodiagnosis studies have shown that hares play a role as active reservoirs. This is the largest reported community outbreak of leishmaniasis in Europe. The discovery of the new reservoir stands out in the multifactorial aetiology of the outbreak. Epidemiological research and environmental intervention measures are continuing.
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Affiliation(s)
- A Arce
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - A Estirado
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - M Ordobas
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - S Sevilla
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - N García
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - L Moratilla
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - S de la Fuente
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
| | - A M Martínez
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
| | - A M Pérez
- Division of Epidemiology, Health Promotion and Prevention Subdirectorate, Primary Care Directorate, Madrid, Spain
| | - E Aránguez
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
| | - A Iriso
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
| | - O Sevillano
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
| | - J Bernal
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
| | - F Vilas
- Division of Health Environmental, Ordination and Inspection Directorate, Health Department, Madrid, Spain
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Navarro D, Alvarado M, Morte B, Berbel D, Sesma J, Pacheco P, Morreale de Escobar G, Bernal J, Berbel P. Late maternal hypothyroidism alters the expression of Camk4 in neocortical subplate neurons: a comparison with Nurr1 labeling. Cereb Cortex 2013; 24:2694-706. [PMID: 23680840 DOI: 10.1093/cercor/bht129] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Maternal thyroid hormones (THs) are essential for normal offspring's neurodevelopment even after onset of fetal thyroid function. This is particularly relevant for preterm children who are deprived of maternal THs following birth, are at risk of suffering hypothyroxinemia, and develop attention-deficit/hyperactivity disorder. Expression of neocortical Ca(2+)/calmodulin kinase IV (Camk4), a genomic target of thyroid hormone, and nuclear receptor-related 1 protein (Nurr1), a postnatal marker of cortical subplate (SP) cells, was studied in euthyroid fetuses and in pups born to dams thyroidectomized in late gestation (LMH group, a model of prematurity), and compared with control and developmentally hypothyroid pups (C and MMI groups, respectively). In LMH pups, the extinction of heavy Camk4 expression in an SP was 1-2 days delayed postnatally compared with C pups. The heavy Camk4 and Nurr1 expression in the SP was prolonged in MMI pups, whereas heavy Camk4 and Nurr1 expression in layer VIb remains at P60. The abnormal expression of Camk4 in the cortical SP and in layer VIb might cause altered cortical connectivity affecting neocortical function.
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Affiliation(s)
- D Navarro
- Department Histology and Anatomy, Universidad Miguel Hernández, Sant Joan d'Alacant, Alicante, Spain
| | - M Alvarado
- Department Histology and Anatomy, Universidad Miguel Hernández, Sant Joan d'Alacant, Alicante, Spain Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz 91100, México
| | - B Morte
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad Autónoma de Madrid, Madrid, Spain Center for Biomedical Research on Rare Diseases (CIBERER), Madrid, Spain
| | - D Berbel
- Department Histology and Anatomy, Universidad Miguel Hernández, Sant Joan d'Alacant, Alicante, Spain
| | - J Sesma
- Department Histology and Anatomy, Universidad Miguel Hernández, Sant Joan d'Alacant, Alicante, Spain
| | - P Pacheco
- Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz 91100, México
| | - G Morreale de Escobar
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad Autónoma de Madrid, Madrid, Spain Center for Biomedical Research on Rare Diseases (CIBERER), Madrid, Spain
| | - J Bernal
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad Autónoma de Madrid, Madrid, Spain Center for Biomedical Research on Rare Diseases (CIBERER), Madrid, Spain
| | - P Berbel
- Department Histology and Anatomy, Universidad Miguel Hernández, Sant Joan d'Alacant, Alicante, Spain
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Rodríguez-Camacho M, Prieto-Corona B, Silva-Pereyra J, Marosi E, Bernal J, Yáñez G, Rodríguez H, Guerrero V, Luviano L. Semantic memory failures in reading disabled (RD) children consistent electrophysiological evidence. Int J Psychophysiol 2012. [DOI: 10.1016/j.ijpsycho.2012.07.098] [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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Bernal J, Hernández M, Silva-Pereyra J, Rodríguez M, Yáñez G, Prieto B, Luviano L, Marosi E, Romero H, Rodríguez H, Guerrero V. Effects of working memory load on visuospatial task in reading disabled children: An event-related potentials study. Int J Psychophysiol 2012. [DOI: 10.1016/j.ijpsycho.2012.07.120] [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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16
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Yáñez G, Romero H, Bernal J, Guerrero V, Marosi E, Prieto B, Rodríguez M, Silva J. Stop paradigm in attention deficit hyperactivity disorder combined type (ADHD/C) children: A study with event related potentials (ERP). Int J Psychophysiol 2012. [DOI: 10.1016/j.ijpsycho.2012.07.039] [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: 11/30/2022]
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17
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Arnáiz E, Bernal J, Martín M, Nozal M, Bernal J, Toribio L. Supercritical fluid extraction of free amino acids from broccoli leaves. J Chromatogr A 2012; 1250:49-53. [DOI: 10.1016/j.chroma.2012.04.066] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 04/25/2012] [Accepted: 04/26/2012] [Indexed: 10/28/2022]
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18
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Ayala-Ramírez P, García-Robles R, Bernal J, Bermúdez M. Detección de ácidos nucleicos fetales en plasma materno: hacia un diagnóstico prenatal no invasivo. Clínica e Investigación en Ginecología y Obstetricia 2012. [DOI: 10.1016/j.gine.2011.09.006] [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: 10/15/2022]
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19
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Molina R, Jiménez MI, Cruz I, Iriso A, Martín-Martín I, Sevillano O, Melero S, Bernal J. The hare (Lepus granatensis) as potential sylvatic reservoir of Leishmania infantum in Spain. Vet Parasitol 2012; 190:268-71. [PMID: 22677135 DOI: 10.1016/j.vetpar.2012.05.006] [Citation(s) in RCA: 165] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 05/04/2012] [Accepted: 05/13/2012] [Indexed: 11/17/2022]
Abstract
Xenodiagnosis of Leishmania infection in hares (Lepus granatensis) from a focus of human leishmaniasis in Fuenlabrada at southwestern Madrid region (Spain) proved that they are infective to Phlebotomus perniciosus. Molecular characterization of isolates obtained from sand flies infected after xenodiagnosis demonstrates that hares were infected by Leishmania infantum. This is the first evidence of the transmission of L. infantum from hares to sand flies. Moreover the results confirm the role that these animals can play as wild reservoirs of leishmaniasis for the recent outbreak of visceral leishmaniasis in Madrid.
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Affiliation(s)
- R Molina
- Servicio de Parasitología, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Ctra. Majadahonda-Pozuelo s/n, 28220 Majadahonda, Madrid, Spain.
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20
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Ares AM, Nozal MJ, Bernal JL, Martín-Hernández R, M Higes, Bernal J. Liquid chromatography coupled to ion trap-tandem mass spectrometry to evaluate juvenile hormone III levels in bee hemolymph from Nosema spp. infected colonies. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 899:146-53. [PMID: 22664054 DOI: 10.1016/j.jchromb.2012.05.016] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 05/02/2012] [Accepted: 05/03/2012] [Indexed: 10/28/2022]
Abstract
It has been described a fast, simple and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method to measure juvenile hormone III (JH III), which was used to study of the effects of Nosema spp. infection on JH III levels in bee hemolymph. Honey bee hemolymph was extracted by centrifugation and mixed with a solution of phenylthiourea in methanol. This mixture was then centrifuged and the supernatant removed and evaporated to dryness. The residue was reconstituted in methanol containing the internal standard (methoprene) and injected onto an LC-MS/MS (ion-trap) system coupled to electrospray ionization (ESI) in positive mode. Chromatography was performed on a Synergi Hydro-RP column (4 μm, 30 mm × 4.60 mm i.d.) using a mobile phase of 20 mM ammonium formate and methanol in binary gradient elution mode. The method was fully validated and it was found to be selective, linear from 15 to 14,562 pg/μL, precise and accurate, with %RSD values below 5%. The limits of detection and quantification were: LOD, 6 pg/μL; LOQ, 15 pg/μL. Finally, the proposed LC-MS/MS method was used to analyze JH III levels in the hemolymph of worker honey bees (Apis mellifera iberiensis) experimentally infected with different Nosema spp. (Nosema apis, Spanish and Dutch Nosema ceranae strains). The highest concentrations of JH III were detected in hemolymph from bees infected with Spanish N. ceranae.
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Affiliation(s)
- A M Ares
- IU CINQUIMA, Analytical Chemistry Group, University of Valladolid, 47071 Valladolid, Spain
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Abstract
Growth hormone (GH) is the main regulator of longitudinal growth before puberty, and treatment with human recombinant (rh) GH can increase muscle strength. Nevertheless, molecular mechanisms responsible remain mostly unknown. Many physiological effects of GH require hormone-mediated changes in gene expression. In an attempt to gain insight into the mechanism of GH action in muscle cells we evaluated the effects of rhGH on gene expression profile in a murine skeletal muscle cell line C2C12. The objective of the work was to identify changes in gene expression in the murine skeletal muscle cell line C2C12 after rGH treatment using microarray assays. C2C12 murine skeletal muscle cell cultures were differentiated during 4 days. After 16 h growing in serum-free medium, C2C12 myotubes were stimulated during 6 h with 500 ng/ml rhGH. Four independent sets of experiments were performed to identify GH-regulated genes. Total RNA was isolated and subjected to analysis. To validate changes candidate genes were analyzed by real-time quantitative polymerase chain reaction. One hundred and fifty-four differentially expressed genes were identified; 90 upregulated and 64 downregulated. Many had not been previously identified as GH-responsive. Real-time PCR in biological replicates confirmed the effect of rGH on 15 genes: Cish, Serpina3g, Socs2, Bmp4, Tnfrsf11b, Rgs2, Tgfbr3, Ugdh, Npy1r, Gbp6, Tgfbi, Tgtp, Btc, Clec3b, and Bcl6. This study shows modifications in the gene expression profile of the C2C12 cell line after rhGH exposure. In vitro and gene function analysis revealed genes involved in skeletal and muscle system as well as cardiovascular system development and function.
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Affiliation(s)
- E Resmini
- Department of Endocrinology,Hospital de Sant Pau,Barcelona,Spain.
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Toribio L, del Nozal M, Bernal J, Bernal J, Martín M. Study of the enantiomeric separation of an acetamide intermediate by using supercritical fluid chromatography and several polysaccharide based chiral stationary phases. J Chromatogr A 2011; 1218:4886-91. [DOI: 10.1016/j.chroma.2010.12.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 12/02/2010] [Accepted: 12/07/2010] [Indexed: 11/17/2022]
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Bernal J, Martín MT, Toribio L, Martín-Hernández R, Higes M, Bernal JL, Nozal MJ. Determination of tylosins A, B, C and D in bee larvae by liquid chromatography coupled to ion trap-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:1596-604. [PMID: 21498134 DOI: 10.1016/j.jchromb.2011.03.052] [Citation(s) in RCA: 8] [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] [Received: 01/21/2011] [Revised: 03/24/2011] [Accepted: 03/25/2011] [Indexed: 11/26/2022]
Abstract
A LC-MS/MS method has been developed to simultaneously quantify tylosins A, B, C and D in bee larvae, compounds currently used to treat one of the most lethal diseases affecting honey bees around the world, American Foulbrood (AFB). The influence of different aqueous media, temperature and light exposure on the stability of these four compounds was studied. The analytes were extracted from bee larvae with methanol and chromatographic separation was achieved on a Luna C(18) (150 × 4.6 mm i.d.) using a ternary gradient composed of a diluted formic acid, methanol and acetonitrile mobile phase. To facilitate sampling, bee larvae were initially dried at 60°C for 4h and afterwards, they were diluted to avoid problems of pressure. MSD-Ion Trap detection was employed with electrospray ionization (ESI). The calibration curves were linear over a wide range of concentrations and the method was validated as sensitive, precise and accurate within the limits of quantification (LOQ, 1.4-4.0 ng/g). The validated method was successfully employed to study bee larvae in field tests of bee hives treated with two formulations containing tylosin. In both cases it was evident that the minimal inhibitory concentration (MIC) had been reached.
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Affiliation(s)
- J Bernal
- IU CINQUIMA, Analytical Chemistry, Faculty of Sciences, University of Valladolid, Valladolid, Spain.
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Bernal J, Garrido-Bailón E, Del Nozal MJ, González-Porto AV, Martín-Hernández R, Diego JC, Jiménez JJ, Bernal JL, Higes M. Overview of pesticide residues in stored pollen and their potential effect on bee colony (Apis mellifera) losses in Spain. J Econ Entomol 2010; 103:1964-1971. [PMID: 21309214 DOI: 10.1603/ec10235] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In the last decade, an increase in honey bee (Apis mellifera L.) colony losses has been reported in several countries. The causes of this decline are still not clear. This study was set out to evaluate the pesticide residues in stored pollen from honey bee colonies and their possible impact on honey bee losses in Spain. In total, 1,021 professional apiaries were randomly selected. All pollen samples were subjected to multiresidue analysis by gas chromatography-mass spectrometry (MS) and liquid chromatography-MS; moreover, specific methods were applied for neonicotinoids and fipronil. A palynological analysis also was carried out to confirm the type of foraging crop. Pesticide residues were detected in 42% of samples collected in spring, and only in 31% of samples collected in autumn. Fluvalinate and chlorfenvinphos were the most frequently detected pesticides in the analyzed samples. Fipronil was detected in 3.7% of all the spring samples but never in autumn samples, and neonicotinoid residues were not detected. More than 47.8% of stored pollen samples belonged to wild vegetation, and sunflower (Heliantus spp.) pollen was only detected in 10.4% of the samples. A direct relation between pesticide residues found in stored pollen samples and colony losses was not evident accordingly to the obtained results. Further studies are necessary to determine the possible role of the most frequent and abundant pesticides (such as acaricides) and the synergism among them and with other pathogens more prevalent in Spain.
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Affiliation(s)
- J Bernal
- IU CINQUIMA, Analytical Chemistry Group, University of Valladolid, E-47071 Valladolid, Spain.
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Bernal J, Bernal JL, Martin MT, Nozal MJ, Anadón A, Martínez-Larrañaga MR, Martínez MA. Development and validation of a liquid chromatography-fluorescence-mass spectrometry method to measure glyphosate and aminomethylphosphonic acid in rat plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:3290-6. [PMID: 21106459 DOI: 10.1016/j.jchromb.2010.10.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [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: 07/13/2010] [Revised: 10/07/2010] [Accepted: 10/16/2010] [Indexed: 11/21/2022]
Abstract
A simple and fast method has been developed and validated to measure glyphosate (GLYP) and aminomethylphosphonic acid (AMPA) in rat plasma based on reversed-phase high performance liquid chromatography (RP-HPLC) coupled to fluorescence (FLD) and electrospray ionization mass spectrometry (ESI-MS) detection. After protein precipitation with acetonitrile, GLYP and AMPA were derivatized with 9-fluorenylmethylchloroformate (FMOC-Cl) and then separated on a C(12) column (250mm×4.60mm i.d.) using a gradient of an ammonium formate (20mM, pH 8.5) and acetonitrile mobile phase. Selected ion monitoring (SIM) mode of the MS was used to obtain maximum sensitivity when quantifying GLYP and AMPA. The validation shows the method to be consistent and reliable, with an intra- and inter-day precision for GLYP and AMPA>9% for both detectors. For both compounds the accuracy ranged from 2.1% to 7.8% for the intra-day readings, and from 4.1% to 8.6% for the inter-day values. The efficacy of GLYP extraction ranged from 87% to 93% and it was between 76% and 88% for AMPA. Moreover, the limits of quantification (LOQ) for GLYP and AMPA were 5 and 10ng/mL, respectively with FLD, and 0.4 and 2ng/mL with ESI-MS. The method was successfully applied to simultaneously measure both compounds in rat plasma samples several days after oral administration of glyphosate.
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Affiliation(s)
- J Bernal
- I.U.CINQUIMA, Analytical Chemistry Group, Faculty of Sciences, University of Valladolid, E-47011 Valladolid, Spain.
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Kiernan TJ, Yan BP, Ruggiero N, Eisenberg JD, Bernal J, Cubeddu RJ, Witzke C, Don C, Cruz-Gonzalez I, Rosenfield K, Pomersantev E, Palacios I. Coronary artery perforations in the contemporary interventional era. J Interv Cardiol 2010; 22:350-3. [PMID: 19453819 DOI: 10.1111/j.1540-8183.2009.00469.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Coronary perforations represent a serious complication of percutaneous coronary intervention (PCI). METHODS We performed a retrospective analysis of documented coronary perforations at Massachusetts General Hospital from 2000 to 2008. Medical records review and detailed angiographic analysis were performed in all patients. RESULTS Sixty-eight cases of coronary perforation were identified from a total of 14,281 PCIs from March 2000 to March 2008 representing an overall incidence of 0.48%. The study cohort was predominantly male (61.8%), mean age 71+/-11 years with 78% representing acute cases (unstable angina: 36.8%, NSTEMI: 30.9%, STEMI: 10.3%). Coronary artery perforation occurred as a complication of wire manipulation in 45 patients (66.2%) with 88.9% of this group being hydrophilic wires, of coronary stenting in 11 (16.2%), of angioplasty alone in 6 (8.8%), and of rotational atherectomy in 8 (11.8%). The perforation was sealed with an angioplasty balloon alone in 16 patients (23.5%), and with stents in 14 patients (20.6%) (covered stents: 11.8% and noncovered stents: 8.8%). Emergency CABG was performed in 2 patients (2.9%). Five patients (7.4%) developed periprocedural MI. The in-hospital mortality rate was 5.9% in the study cohort. CONCLUSION Coronary artery perforation as a complication of PCI is still rare as demonstrated in our series with an incidence of 0.48%. The predominant cause of coronary perforations in the current era of PCI is wire injury.
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Affiliation(s)
- T J Kiernan
- Division of Interventional Cardiology, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
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Prieto-Corona B, Rodríguez-Camacho M, Silva-Pereyra J, Marosi E, Bernal J, Yáñez G, Guerrero V, Luviano L, Hernández M, Rodríguez H. Current sources of the event-related potentials (ERP) during arithmetic fact retrieval: Differences among children and adults. Int J Psychophysiol 2010. [DOI: 10.1016/j.ijpsycho.2010.06.188] [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: 11/16/2022]
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28
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Romero H, Yáñez G, Bernal J, Fernández T. Event-related potentials (ERP) to attention and behavior inhibition in children with attention deficit hyperactivity disorder (ADHD). Int J Psychophysiol 2010. [DOI: 10.1016/j.ijpsycho.2010.06.051] [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: 10/19/2022]
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29
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Jiménez JJ, Bernal JL, Nozal MJ, Toribio L, Bernal J. Profile and relative concentrations of fatty acids in corn and soybean seeds from transgenic and isogenic crops. J Chromatogr A 2009; 1216:7288-95. [PMID: 19716136 DOI: 10.1016/j.chroma.2009.08.015] [Citation(s) in RCA: 28] [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] [Received: 04/22/2009] [Revised: 07/29/2009] [Accepted: 08/06/2009] [Indexed: 11/24/2022]
Abstract
In this work 44 fatty acids, which were analyzed as methyl esters by GC/MS in scan mode, have been determined in genetically modified corn and soybean seeds. Their relative concentrations have been compared with those of isogenic lines grown in the same conditions. Studied compounds comprised saturated and unsaturated fatty acids, including cis/trans isomers and minor fatty acids. A classical soxhlet extraction and an accelerated solvent extraction have been assayed to extract the fatty compounds from seeds and the GC separation has been carried out on a biscyanopropylpolysiloxane chromatographic column. Soxhlet extraction was selected as the most convenient and applied to compare the samples. Specific compounds, which could denote the origin of the crop have not been observed, but for some sample pairs, significant differences have been found in relation to the percentage of certain acids; the highest differences for major acids were 4.1% in corn and 4.8% in soybean. The concentrations of long chain acids such as 24:0, 26:0 and 28:0 were higher in some isogenic lines whereas the concentrations of short chain acids such as 6:0, 8:0, 9:0, 10:0 and 12:0 were higher in their transgenic counterparts.
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Affiliation(s)
- J J Jiménez
- I.U.CINQUIMA, Analytical Chemistry Group, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
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31
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Prieto-Corona B, Rodriguez-Camacho M, Silva-Pereyra J, Marosi E, Fernandez T, Bernal J, Yanez G, Luviano L, Romero H, Guerrero V, Rodriguez H. Arithmetic and semantic priming: An event-related potentials (ERP) study in normal and reading/arithmetic disabled children. Int J Psychophysiol 2008. [DOI: 10.1016/j.ijpsycho.2008.05.106] [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: 11/29/2022]
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32
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Bernal J, Rodriguez-Camacho M, Yanez G, Prieto B, Silva-Pereyra J, Marosi E, Luviano L, Hernбndez-Balderas M, Guerrero V, Rodriguez H. ERP in normal and poor readers children: A study of three attentional level tasks. Int J Psychophysiol 2008. [DOI: 10.1016/j.ijpsycho.2008.05.111] [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: 11/29/2022]
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33
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Silva-Pereyra J, Bernal J, Rodriguez M, Yanez G, Prieto B, Luviano L, Hernandez-Balderas M, Marosi E, Guerrero V, Rodriguez H. Neuroimaging of attention deficiencies in poor readers. Int J Psychophysiol 2008. [DOI: 10.1016/j.ijpsycho.2008.05.109] [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: 11/30/2022]
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34
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Marosi E, Bernal J, Prieto B, Yacez G, Rodriguez M, Silva J, Rodriguez H, Guerrero V, Luviano L. EEG spectral power values during the presentation of the international affective pictures. Int J Psychophysiol 2008. [DOI: 10.1016/j.ijpsycho.2008.05.103] [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: 10/21/2022]
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35
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Rodriguez-Camacho M, Prieto-Corona B, Silva-Pereyra J, Bernal J, Marosi E, Yanez G, Luviano L, Guerrero V, Rodriguez H. Event-related potentials (ERP) study of arithmetic priming: Comparison between children and adults. Int J Psychophysiol 2008. [DOI: 10.1016/j.ijpsycho.2008.05.107] [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: 10/21/2022]
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36
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Nozal M, Bernal J, Martín M, Bernal J, Álvaro A, Martín R, Higes M. Trace analysis of fumagillin in honey by liquid chromatography-diode array–electrospray ionization mass spectrometry. J Chromatogr A 2008; 1190:224-31. [DOI: 10.1016/j.chroma.2008.03.019] [Citation(s) in RCA: 19] [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] [Received: 12/04/2007] [Revised: 02/18/2008] [Accepted: 03/06/2008] [Indexed: 11/28/2022]
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37
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Márquez-Gamiño S, Sotelo F, Sosa M, Caudillo C, Holguín G, Ramos M, Mesa F, Bernal J, Córdova T. Pulsed electromagnetic fields induced femoral metaphyseal bone thickness changes in the rat. Bioelectromagnetics 2008; 29:406-9. [DOI: 10.1002/bem.20396] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Agretti P, De Marco G, Pinchera A, Vitti P, Bernal J, Tonacchera M. Ras homolog enriched in striatum inhibits the functional activity of wild type thyrotropin, follicle-stimulating hormone, luteinizing hormone receptors and activating thyrotropin receptor mutations by altering their expression in COS-7 cells. J Endocrinol Invest 2007; 30:279-84. [PMID: 17556863 DOI: 10.1007/bf03346294] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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] [Indexed: 12/23/2022]
Abstract
Ras homolog enriched in striatum (Rhes) is a member of the Ras family of small GTPases detected in the thyroid. Rhes inhibits signal transduction from Galphas protein. In this study we investigated whether Rhes can interfere with stimulation of cAMP/protein kinase A (PKA) pathway of TSH, FSH and LH receptors (TSHr, FSHr, LHr) and of activated TSHr mutants. Receptors were transiently transfected in COS-7 cells with or without Rhes; cAMP was evaluated in basal conditions and after hormone stimulation. Constitutive and bovine TSH (bTSH)-stimulated activity of wild type (wt) and mutated TSHr was inhibited after Rhes co-transfection. Rhes decreased cAMP after FSH and hCG beta-subunit (betahCG) stimulation in cells expressing the cognate receptors. In binding experiments Rhes, as another membrane protein, sodium/iodide symporter (NIS), reduced membrane expression of wt TSHr (wtTSHr). In conclusion, Rhes can interfere with the functional activity of wt and mutated TSHr and with the respective hormone-stimulated cAMP production of FSHr and LHr. This interference is not specific and due to the co-expression of two membrane proteins.
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Affiliation(s)
- P Agretti
- Department of Endocrinology and Metabolism, Centro Eccellenza AmbiSEN University of Pisa, Pisa, Italy
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39
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Jiménez J, Bernal J, del Nozal M, Bernal J, Toribio L. Persistence and degradation of metalaxyl, lindane, fenvalerate and deltamethrin during the wine making process. Food Chem 2007. [DOI: 10.1016/j.foodchem.2006.11.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jiménez JJ, Bernal JL, del Nozal MAJ, Martín MAT, Bernal J. Sample preparation methods for beeswax characterization by gas chromatography with flame ionization detection. J Chromatogr A 2006; 1129:262-72. [PMID: 16854423 DOI: 10.1016/j.chroma.2006.06.098] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Revised: 06/27/2006] [Accepted: 06/29/2006] [Indexed: 11/27/2022]
Abstract
New and simpler methods of sample preparation to determine several families of compounds in beeswax by conventional and high temperature gas chromatography are proposed. To analyze hydrocarbons and palmitates, a dilution of sample is enough whereas for the total acid content, a hydrolysis and simultaneous methylation with BF3-methanol results more effective than the usual methods; for the total content of alcohols, a further acetylation with acetic anhydride is necessary. Free alcohols are directly acetylated in a sample dissolution but for free acids and monoesterified 1,2,3-propanetriols analysis, a previous extraction with acetonitrile is required. The concentrations of all the compounds studied are expressed in weight percentage referred only to one standard: octadecyl octadecanoate. The precision of the analytical methods has been evaluated showing its importance in the analysis of beeswaxes used in apiculture.
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Affiliation(s)
- J J Jiménez
- Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Prado de la Magdalena s/n, Valladolid, Spain.
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41
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Nozal MJ, Bernal JL, Martín MT, Jiménez JJ, Bernal J, Higes M. Trace analysis of tiamulin in honey by liquid chromatography–diode array–electrospray ionization mass spectrometry detection. J Chromatogr A 2006; 1116:102-8. [PMID: 16574136 DOI: 10.1016/j.chroma.2006.03.028] [Citation(s) in RCA: 17] [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] [Received: 12/14/2005] [Revised: 03/08/2006] [Accepted: 03/09/2006] [Indexed: 11/27/2022]
Abstract
A liquid chromatography with diode array or electrospray ionisation mass spectrometry detection (LC-DAD-ESI-MS) method for the determination of tiamulin residues in honey is presented. The procedure employs a solid-phase extraction (SPE) on polymeric cartridges for the isolation of tiamulin from honey samples diluted in aqueous solution of tartaric acid. Chromatographic separation of the tiamulin is performed, in isocratic mode, on a C18 column using methanol and ammonium carbonate 0.1% in water, in proportion (30:70, v/v). Average analyte recoveries were from 88 to 106% in replica sets of fortified honey samples. The LC-ESI-MS method detection limits differ from 0.5 microg kg(-1) for clear honeys to 1.2 microg kg(-1) for dark honeys. The developed method has been applied to the analysis of tiamulin residues in multifloral honey samples collected from veterinary treated beehives.
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Affiliation(s)
- M J Nozal
- Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, 47005 Valladolid, Spain.
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42
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Montero-Pedrazuela A, Venero C, Lavado-Autric R, Fernández-Lamo I, García-Verdugo JM, Bernal J, Guadaño-Ferraz A. Modulation of adult hippocampal neurogenesis by thyroid hormones: implications in depressive-like behavior. Mol Psychiatry 2006; 11:361-71. [PMID: 16446739 DOI: 10.1038/sj.mp.4001802] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.4] [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] [Indexed: 02/06/2023]
Abstract
Hormonal imbalances are involved in many of the age-related pathologies, as neurodegenerative and psychiatric diseases. Specifically, thyroid state alterations in the adult are related to psychological changes and mood disorders as depression. The dentate gyrus of the hippocampal formation undergoes neurogenesis in adult mammals including humans. Recent evidence suggests that depressive disorders and their treatment are tightly related to the number of newly born neurons in the dentate gyrus. We have studied the effect of thyroid hormones (TH) on hippocampal neurogenesis in adult rats in vivo. A short period of adult-onset hypothyroidism impaired normal neurogenesis in the subgranular zone of the dentate gyrus with a 30% reduction in the number of proliferating cells. Hypothyroidism also reduced the number of newborn neuroblasts and immature neurons (doublecortin (DCX) immunopositive cells) which had a severely hypoplastic dendritic arborization. To correlate these changes with hippocampal function, we subjected the rats to the forced swimming and novel object recognition tests. Hypothyroid rats showed normal memory in object recognition, but displayed abnormal behavior in the forced swimming test, indicating a depressive-like disorder. Chronic treatment of hypothyroid rats with TH not only normalized the abnormal behavior but also restored the number of proliferative and DCX-positive cells, and induced growth of their dendritic trees. Therefore, hypothyroidism induced a reversible depressive-like disorder, which correlated to changes in neurogenesis. Our results indicate that TH are essential for adult hippocampal neurogenesis and suggest that mood disorders related to adult-onset hypothyroidism in humans could be due, in part, to impaired neurogenesis.
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Affiliation(s)
- A Montero-Pedrazuela
- Department of Molecular Endocrinology, Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Madrid, Spain
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43
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Nozal MJ, Bernal JL, Martín MT, Bernal J, Torres RM, Merayo J. LC-ESI-MSD fast determination of residual mitomycin C in hen aqueous humour after corneal refractive surgery. J Pharm Biomed Anal 2006; 40:100-4. [PMID: 16081234 DOI: 10.1016/j.jpba.2005.06.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 02/08/2005] [Revised: 06/13/2005] [Accepted: 06/13/2005] [Indexed: 11/30/2022]
Abstract
A simple, fast and reliable method has been developed for the assay of traces of mitomycin C (MMC) in hen aqueous humour samples. The determination was carried out by high-performance liquid chromatography with electrospray ionization mass spectrometric detection. In isocratic elution analysis, the mobile phase was a mixture of water-acetonitrile (78:22, v/v) and the chromatographic column was C(18) at 35 degrees C. The method has been validated over a range from 0.1 to 250 microg L(-1) in hen aqueous humour with correlation coefficients higher than 0.999. Limit of detection and limit of quantification for MMC based in signal to noise ratio of 3 and 10, respectively, were 20 and 71 ng L(-1). The developed method allows the analysis of MMC in hen aqueous humour samples obtained at different times and conditions in order to evaluate and compare the efficacy of the drug administration.
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Affiliation(s)
- M J Nozal
- Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, 47005 Valladolid, Spain.
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44
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Nozal MJ, Bernal JL, Jiménez JJ, Martín MT, Bernal J. Determination of azolic fungicides in wine by solid-phase extraction and high-performance liquid chromatography–atmospheric pressure chemical ionization–mass spectrometry. J Chromatogr A 2005; 1076:90-6. [PMID: 15974073 DOI: 10.1016/j.chroma.2005.04.044] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [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: 10/25/2022]
Abstract
A method for simultaneous analysis of eight azolic fungicides: cyproconazole, diniconazole, tetraconazole, thiabendazole, flusilazole, triadimenol, triadimefon, carbendazim and the degradation product 2-aminobenzimidazole in wine samples is described. The compounds are isolated from the samples and concentrated by solid-phase extraction on polymeric cartridges. The determination is carried out by liquid chromatography with mass spectrometric detection in positive ionization and selected ion monitoring modes. The influence of parameters such as the mobile phase composition, column temperature, corona current and fragmentor voltage is studied and the proposed method is validated. Recoveries of the nine compounds added to wine samples range from 83 to 109%, with relative standard deviations below 10%. The quantitation limits are between 9 and 31 microg/L. Real wine samples are analyzed by the proposed method, also.
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Affiliation(s)
- Maria J Nozal
- Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Prado de la Magdalena s/n, E-47005 Valladolid, Spain.
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Hall I, Strydom A, Richards M, Hardy R, Bernal J, Wadsworth M. Social outcomes in adulthood of children with intellectual impairment: evidence from a birth cohort. J Intellect Disabil Res 2005; 49:171-182. [PMID: 15713192 DOI: 10.1111/j.1365-2788.2005.00636.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
BACKGROUND Social Policy for people with intellectual disabilities (ID) continues to evolve, but little is known about the lives to which such policies are applied. We aimed to use a prospective follow-up of a British birth cohort to identify children with mild and more severe intellectual impairment, and compare a range of social outcomes in adulthood with people in the rest of the cohort. METHOD We used data from the MRC National Survey for Health and Development. Intellectual impairment was identified by intelligence tests and educational history. Adult outcome measures included employment and social class, education, marriage and children, home ownership, social networks and community use. RESULTS We identified 111 people with mild intellectual impairment (2.7%) and 23 with severe intellectual impairment (0.6%) at age 15/16. By the age of 43, there were 52 people remaining in the mild impairment group and 14 in the severe impairment group. In adulthood those with intellectual impairment enjoyed contact with friends and family, and joined in informal social activities. Although the mild intellectual impairment group were less likely to attain the following social outcomes than people with normal intellectual functioning, 67% had jobs, 73% were married, 62% had children and 54% owned their own homes. 12% participated in adult education. People with more severe intellectual impairment were less likely to attain these outcomes. CONCLUSIONS These outcomes highlight issues in current social policy and suggest efforts should be directed particularly towards promoting educational opportunities and developing social inclusion for people with ID.
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Affiliation(s)
- I Hall
- Department of Psychiatry and Behavioural Sciences, University College London, London, UK.
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46
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Quignodon L, Legrand C, Allioli N, Guadaño-Ferraz A, Bernal J, Samarut J, Flamant F. Thyroid hormone signaling is highly heterogeneous during pre- and postnatal brain development. J Mol Endocrinol 2004; 33:467-76. [PMID: 15525602 DOI: 10.1677/jme.1.01570] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [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] [Indexed: 11/27/2022]
Abstract
We have generated transgenic reporter mice to analyze the spatio-temporal distribution of thyroid hormone signaling during mouse brain development. The reporter system, utilizing a chimeric yeast Gal4 DNA-binding domain-thyroid hormone alpha ligand-binding domain fusion protein to drive lacZ expression, revealed that thyroid hormone signaling starts in the midbrain roof several days before the onset of thyroid gland function, and that it remains highly heterogeneous in the central nervous system throughout pre- and postnatal development. We speculate that this heterogeneity might provide neural cells with positional information during development.
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Affiliation(s)
- L Quignodon
- Laboratoire de Biologie Moléculaire et Cellulaire de l'Ecole Normale Supérieure de Lyon, UMR CNRS 5665 LA INRA 913, IFR128 Lyon Gerland, 46 allée d'Italie, 69364 Lyon 07 France
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Abstract
The use of low-temperature capillary gas chromatography coupled to electron impact mass spectrometry for the characterization of crude beeswaxes yielded by Apis mellifera is described. The system allows the identification of a great number of compounds, some of them not reported till now in beeswax, such as a family of ethyl esters, tetracosyl oleate, and several saturated and unsaturated hydrocarbons. The information acquired makes possible the differentiation between pure beeswax and some foundation beeswax samples where mixture of pure beeswax with another substances is suspected.
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Affiliation(s)
- J J Jiménez
- Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Prado de la Magdalena s/n, 47005 Valladolid, Spain.
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Jiménez JJ, Bernal JL, Aumente S, Toribio L, Bernal J. Quality assurance of commercial beeswax II. Gas chromatography-electron impact ionization mass spectrometry of alcohols and acids. J Chromatogr A 2003; 1007:101-16. [PMID: 12924556 DOI: 10.1016/s0021-9673(03)00962-2] [Citation(s) in RCA: 30] [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] [Indexed: 11/25/2022]
Abstract
Gas chromatography with mass spectrometric detection was used to find the fraction of alcohols and acids present in pure beeswax from Apis mellifera. Some new compounds not described till now were found, such as a family of unsaturated linear fatty acids, several hydroxyacids and 1,2,3-propanetriol monoesters. The chromatographic profiles obtained from pure beeswax and bee-rejected foundation beeswax can be used to discriminate them; they mainly differ in the amount of some acids and alcohols.
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Affiliation(s)
- J J Jiménez
- Department of Analytical Chemistry, Faculty of Sciences, University of Valladolid, Prado de la Magdalena s/n, 47005 Valladolid, Spain.
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49
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De Groef B, Geris KL, Manzano J, Bernal J, Millar RP, Abou-Samra AB, Porter TE, Iwasawa A, Kühn ER, Darras VM. Involvement of thyrotropin-releasing hormone receptor, somatostatin receptor subtype 2 and corticotropin-releasing hormone receptor type 1 in the control of chicken thyrotropin secretion. Mol Cell Endocrinol 2003; 203:33-9. [PMID: 12782401 DOI: 10.1016/s0303-7207(03)00120-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [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] [Indexed: 11/24/2022]
Abstract
Thyrotropin or thyroid-stimulating hormone (TSH) secretion in the chicken is controlled by several hypothalamic hormones. It is stimulated by thyrotropin-releasing hormone (TRH) and corticotropin-releasing hormone (CRH), whereas somatostatin (SRIH) exerts an inhibitory effect. In order to determine the mechanism by which these hypothalamic hormones modulate chicken TSH release, we examined the cellular localization of TRH receptors (TRH-R), CRH receptors type 1 (CRH-R1) and somatostatin subtype 2 receptors (SSTR2) in the chicken pars distalis by in situ hybridization (ISH), combined with immunological staining of thyrotropes. We show that thyrotropes express TRH-Rs and SSTR2s, allowing a direct action of TRH and SRIH at the level of the thyrotropes. CRH-R1 expression is virtually confined to corticotropes, suggesting that CRH-induced adrenocorticotropin release is the result of a direct stimulation of corticotropes, whereas CRH-stimulated TSH release is not directly mediated by the known chicken CRH-R1. Possibly CRH-induced TSH secretion is mediated by a yet unknown type of CRH-R in the chicken. Alternatively, a pro-opiomelanocortin (POMC)-derived peptide, secreted by the corticotropes following CRH stimulation, could act as an activator of TSH secretion in a paracrine way.
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Affiliation(s)
- B De Groef
- Laboratory of Comparative Endocrinology, Naamsestraat 61, K.U. Leuven, B-3000 Leuven, Belgium.
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Guadaño-Ferraz A, Benavides-Piccione R, Venero C, Lancha C, Vennström B, Sandi C, DeFelipe J, Bernal J. Lack of thyroid hormone receptor alpha1 is associated with selective alterations in behavior and hippocampal circuits. Mol Psychiatry 2003; 8:30-8. [PMID: 12556906 DOI: 10.1038/sj.mp.4001196] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.4] [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] [Indexed: 11/09/2022]
Abstract
Brain development and function are dependent on thyroid hormone (T3), which acts through nuclear hormone receptors. T3 receptors (TRs) are transcription factors that activate or suppress target gene expression in a hormone-dependent or -independent fashion. Two distinct genes, TRalpha and TRbeta, encode several receptor isoforms with specific functions defined in many tissues but not in the brain. Mutations in the TRbeta gene cause the syndrome of peripheral resistance to thyroid hormone; however, no alterations of the TRalpha gene have been described in humans. Here we demonstrate that mice lacking the TRalpha1 isoform display behavioral abnormalities of hippocampal origin, as shown by the open field and fear conditioning tests. In the open field test mutant mice revealed less exploratory behavior than wild-type mice. In the contextual fear conditioning test mutant mice showed a significantly higher freezing response than wild-type controls when tested 1 week after training. These findings correlated with fewer GABAergic terminals on the CA1 pyramidal neurons in the mutant mice. Our results indicate that TRalpha1 is involved in the regulation of hippocampal structure and function, and raise the possibility that deletions or mutations of this receptor isoform may lead to behavioral changes or even psychiatric syndromes in humans.
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Affiliation(s)
- A Guadaño-Ferraz
- Instituto de Investigaciones Biomédicas Alberto Sols, CSIC-UAM, Madrid, Spain
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