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Pastor J, Vega-Zelaya L, Torres CV, Navas-García M, López-Manzanares L. [Towards a positive physiological definition of the deep brain nuclei in humans]. Rev Neurol 2022; 75:369-376. [PMID: 36514203 DOI: 10.33588/rn.7512.2022187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Using microelectrodes for recording purposes in deep brain stimulation (DBS) has proven to be very useful. Their efficiency can be improved by characterising the properties of extracellular action potentials (EAPs). PATIENTS AND METHODS We analysed the records of nine patients who underwent surgery for epilepsy or aggressiveness under general anaesthesia. The properties of the EAPs of the centromedian, ventral intermediate, ventrocaudal and posteromedial hypothalamic nuclei of the thalamus have been determined. RESULTS We have analysed 706 thalamic and 142 hypothalamic cells. The proportion of cell types was found to be specific to each cell nucleus. The most frequent cell type was P1P2N1 (59.5%), followed by N1P1N2 (23.1%). The first phase of the EAP is highly variable. The properties of the EAP phases of the same morphology differ greatly from one nucleus to another. CONCLUSIONS We have shown that several deep brain nuclei have properties that are specific to the morphology of the EAPs. This will allow for improved localisation of these nuclei during DBS.
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Affiliation(s)
- J Pastor
- Hospital Universitario de La Princesa, 28006 Madrid, España.,Instituto de Investigación Biomédica. Hospital Universitario de La Princesa, Madrid, España
| | - L Vega-Zelaya
- Hospital Universitario de La Princesa, 28006 Madrid, España.,Instituto de Investigación Biomédica. Hospital Universitario de La Princesa, Madrid, España
| | - C V Torres
- Hospital Universitario de La Princesa, Madrid, España.,Instituto de Investigación Biomédica. Hospital Universitario de La Princesa, Madrid, España
| | - M Navas-García
- Hospital Universitario de La Princesa, 28006 Madrid, España.,Instituto de Investigación Biomédica. Hospital Universitario de La Princesa, Madrid, España
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Brandts I, Cánovas M, Tvarijonaviciute A, Llorca M, Vega A, Farré M, Pastor J, Roher N, Teles M. Nanoplastics are bioaccumulated in fish liver and muscle and cause DNA damage after a chronic exposure. Environ Res 2022; 212:113433. [PMID: 35580665 DOI: 10.1016/j.envres.2022.113433] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [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: 01/25/2022] [Revised: 04/22/2022] [Accepted: 05/03/2022] [Indexed: 06/15/2023]
Abstract
The extent of the widespread, planetary contamination by plastic waste is difficult to fully capture. Nanoplastics (NPs) are currently in the center of research concerning plastic litter, both for the analytical challenges they pose and for their potential to provoke hazardous effects in organisms. However, there are still many unanswered questions in this multidisciplinary field, with a crucial missing piece being the quantification of NPs in fish tissues after in vivo exposures. Another relevant question that is still greatly unexplored is how a chronic exposure to NPs will affect fish health. This study aims to provide answers to both of these relevant knowledge gaps. To this end, goldfish (Carassius auratus) were exposed to 44 nm polystyrene (PS)-NPs via water for 30 days. Following the exposure, gastrointestinal tract, liver and muscle were sampled for PS-NPs analysis by means of size exclusion chromatography coupled to high resolution mass spectrometry. PS-NPs were detected in all liver and muscle samples of exposed fish, with higher concentrations in liver than in muscle, whereas no PS-NPs were detected in the gastrointestinal tract. Nevertheless, exposure to PS-NPs did not induce changes in hematology parameters nor in cortisol and glucose levels in plasma. On the other hand, even a relatively low concentration of PS-NPs was able to cause DNA damage, measured by an increase in erythrocyte nuclear abnormalities, suggesting that PS-NPs can reach the cell nucleus and cause genotoxicity. These results show for the first time that PS-NPs find their way to fish muscle after chronic exposure, where they bioaccumulate, but do not alter fish survival nor hematological or physiological stress indicators. The accumulation of PS-NPs in fish muscle can represent a threat to human health as a possible route of exposure to small-sized plastics. The present results in a model fish species open windows for future studies in edible fish species.
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Affiliation(s)
- I Brandts
- Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain; Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - M Cánovas
- Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - A Tvarijonaviciute
- Interdisciplinary Laboratory of Clinical Analysis Interlab-UMU, Regional Campus of International Excellence Mare Nostrum, University of Murcia, Espinardo, Murcia, 30100, Spain
| | - M Llorca
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Barcelona, Spain
| | - A Vega
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Barcelona, Spain
| | - M Farré
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Barcelona, Spain
| | - J Pastor
- Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - N Roher
- Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain; Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - M Teles
- Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain; Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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Arévalo-Sáenz A, López-Manzanares L, Navas-García M, Pastor J, Vega-Zelaya L, Torres CV. Deep brain stimulation in Parkinson's disease: analysis of brain fractional anisotropy differences in operated patients. Rev Neurol 2022; 74:125-134. [PMID: 35148421 DOI: 10.33588/rn.7404.2021196] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Deep brain stimulation (DBS) of the subthalamic nucleus is currently an evidence-based therapeutic option for motor symptoms in patients with Parkinson's disease (PD), although other non-motor symptoms can be affected by stimulation. AIM Our objective is to evaluate the global changes in the connectivity of the large-scale structural network in PD patients that have obtained a benefit from subthalamic DBS. SUBJECTS AND METHODS Retrospective study of 31 subjects: 7 PD patients with subthalamic DBS (group A), 12 age and gender-matched non-operated PD (B) and 12 healthy controls (C). All subjects had undergone a 1.5 T brain MRI with DTI. DICOM images were processed with the FSL5.0 software and TBSS tool. RESULTS The study group comprised 23 men and 8 women. No statistically significant differences in age, gender, scores on the HandY scale and mean follow-up between group A and B were found, and in age and gender between groups A and C. Statistical analysis revealed differences in the fractional anisotropy of the different groups in certain areas: bilateral corticospinal tract, anterior thalamic radiations, bilateral fronto-occipital fascicle, both superior longitudinal fascicles, and left inferior longitudinal fascicle. CONCLUSIONS In our series, PD patients treated with bilateral subthalamic DBS showed a significantly higher fractional anisotropy in widespread areas of the cerebral white matter; suggesting that neuromodulation produces connectivity changes in different neural networks.
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Affiliation(s)
| | | | - M Navas-García
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - J Pastor
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - L Vega-Zelaya
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - C V Torres
- Hospital Universitario de La Princesa, 28006 Madrid, España
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Abstract
Every surgeon starts the training with suturing, which can be very confusing as most of the senior surgeons have their own style, approach, tricks and different rules to follow. It is hard for residents and medical students to know what is an evidence-based rule that should be followed and what is a personal trick of their teacher that can be modified. We provide a review of current data on surgical suturing with all the reasons for specific techniques. Parameters of the correct skin suture, practical guide and all the complications are mentioned in the text.
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Affiliation(s)
- V Kunc
- Department of Anatomy, Second Faculty of Medicine, Charles University, Prague
| | - J Pastor
- Department of Anatomy, Second Faculty of Medicine, Charles University, Prague.,Third Department of Surgery, First Faculty of Medicine, Charles University and Motol University Hospital, Prague
| | - A Haluza
- Department of Anatomy, Second Faculty of Medicine, Charles University, Prague
| | - D Kachlik
- Department of Anatomy, Second Faculty of Medicine, Charles University, Prague.,Department of Health Care Studies, College of Polytechnics, Jihlava. Czech Republic
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García-Serna AM, Martín-Orozco E, Jiménez-Guerrero P, Hernández-Caselles T, Pérez-Fernández V, Cantero-Cano E, Muñoz-García M, Molina-Ruano MD, Rojo-Atenza E, García-Marcos L, Morales E, Garcia‐Marcos L, Gimenez‐Banon MJ, Martinez‐Torres A, Morales E, Perez‐Fernandez V, Sanchez‐Solis M, Nieto A, Prieto‐Sanchez MT, Sanchez‐Ferrer M, Fernanez‐Palacios L, Gomez‐Gomez VP, Martinez‐Gracia C, Peso‐Echarri P, Ros‐Berruezo G, Santaella‐Pacual M, Gazquez A, Larque E, Pastor‐Fajardo MT, Sanchez‐Campillo M, Serrano‐Munuera A, Zornoza‐Moreno M, Jimenez‐Guerrero P, Adomnei E, Arense‐Gonzalo JJ, Mendiola J, Navarro‐Lafuente F, Torres‐Cantero AM, Salvador‐Garcia C, Segovia‐Hernández M, Yagüe‐Guirao G, Valero‐Guillén PL, Aviles‐Plaza FV, Cabezas‐Herrera J, Martinez‐Lopez A, Martinez‐Villanueva M, Noguera‐Velasco JA, Franco‐Garcia A, Garcia‐Serna AM, Hernandez‐Caselles T, Martin‐Orozco E, Norte‐Muñoz M, Canovas M, Cantero‐Cano E, de Diego T, Pastor JM, Sola‐Martínez RA, Esteban‐Gil A, Fernández‐Breis JT, Alcántara MV, Hernández S, López‐Soler C. Cytokine profiles in cord blood in relation to prenatal traffic-related air pollution: The NELA cohort. Pediatr Allergy Immunol 2022; 33:e13732. [PMID: 35212052 DOI: 10.1111/pai.13732] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 10/04/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Outdoor air pollution may disturb immune system development. We investigated whether gestational exposure to traffic-related air pollutants (TRAP) is associated with unstimulated cytokine profiles in newborns. METHODS Data come from 235 newborns of the NELA cohort. Innate response-related cytokines (IL-6, IFN-α, IL1-β, and TNF-α), Th1-related (IFN-γ and IL-2), Th2-related (IL-4, IL-5, and IL-13), Th17-related (IL-17 and IL-23), and immunomodulatory cytokine IL-10 were quantified in the supernatant of unstimulated whole umbilical cord blood cells after 7 days of culture using the Luminex technology. Dispersion/chemical transport modeling was used to estimate long-term (whole pregnancy and trimesters) and short-term (15 days before delivery) residential exposures to traffic-related nitrogen dioxide (NO2 ), particulate matter (PM2.5 and PM10 ), and ozone (O3 ). We fitted multivariable logistic regression, Bayesian kernel machine regression (BKMR), and weighted quantile sum (WQS) regression models. RESULTS NO2 during the whole pregnancy increased the odds of detection of IL-1β (OR per 10 µg/m3 increase = 1.37; 95% CI, 1.02, 1.85) and IL-6 (OR per 10 µg/m3 increase = 1.32; 95% CI 1.00, 1.75). Increased odds of detected concentrations of IL-10 was found in newborns exposed during whole pregnancy to higher levels of NO2 (OR per 10 µg/m3 increase = 1.30; 95% CI 0.99, 1.69), PM10 (OR per 10 µg/m3 increase = 1.49; 95% CI 0.95, 2.33), and PM2.5 (OR per 5 µg/m3 increase = 1.56; 95% CI 0.97, 2.51). Exposure to O3 during the whole pregnancy increased the odds of detected IL-13 (OR per 10 µg/m3 increase = 1.22; 95% CI 1.01, 1.49). WQS model revealed first and third trimesters of gestation as windows of higher susceptibility. CONCLUSIONS Gestational exposure to TRAP may increase detection of pro-inflammatory, Th2-related, and T regulatory cytokines in newborns. These changes might influence immune system responses later in life.
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Affiliation(s)
- Azahara M García-Serna
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Department of Biochemistry and Molecular Biology B and Immunology, Faculty of Medicine, University of Murcia, Murcia, Spain
| | - Elena Martín-Orozco
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Department of Biochemistry and Molecular Biology B and Immunology, Faculty of Medicine, University of Murcia, Murcia, Spain.,Network of Asthma and Adverse and Allergic Reactions (ARADyAL), Madrid, Spain
| | - Pedro Jiménez-Guerrero
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Regional Atmospheric Modelling Group, Department of Physics, University of Murcia, Murcia, Spain
| | - Trinidad Hernández-Caselles
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Department of Biochemistry and Molecular Biology B and Immunology, Faculty of Medicine, University of Murcia, Murcia, Spain.,Network of Asthma and Adverse and Allergic Reactions (ARADyAL), Madrid, Spain
| | - Virginia Pérez-Fernández
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Department of Public Health Sciences, Faculty of Medicine, University of Murcia, Murcia, Spain
| | | | | | - María Dolores Molina-Ruano
- Obstetrics & Gynecology Service, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, Murcia, Spain
| | - Encarna Rojo-Atenza
- Obstetrics & Gynecology Service, Virgen de la Arrixaca University Clinical Hospital, University of Murcia, Murcia, Spain
| | - Luis García-Marcos
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Network of Asthma and Adverse and Allergic Reactions (ARADyAL), Madrid, Spain.,Pediatric Allergy and Pulmonology Units, Virgen de la Arrixaca University Children's Hospital, University of Murcia, Murcia, Spain
| | - Eva Morales
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), Murcia, Spain.,Department of Public Health Sciences, Faculty of Medicine, University of Murcia, Murcia, Spain
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Zhu L, Blanco-Aparicio C, Bertero L, Soffietti R, Weiss T, Muñoz J, Sepúlveda J, Weller M, Pastor J, Valiente M. OS06.7A METPlatform identifies brain metastasis vulnerabilities and predicts patient response to therapy. Neuro Oncol 2021. [DOI: 10.1093/neuonc/noab180.031] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
The diagnosis of brain metastasis involves high morbidity and mortality and remains an unmet clinical need in spite of being the most common tumor in the brain. Exclusion of these cancer patients from clinical trials is a major cause of their limited therapeutic options.
MATERIAL AND METHODS
We report a novel drug-screening platform (METPlatform) based on organotypic cultures which allows identifying effective anti-metastasis agents in the presence of the organ microenvironment. We have applied this approach to clinically relevant stages of brain metastasis using both experimental models and human tumor tissue (by performing patient-derived organotypic cultures - PDOCs -). We have also used METPlatform to perform unbiased proteomics of brain metastases in situ to identify potential novel mediators of this disease and explore resistance mechanisms to targeted therapy. Finally, we have exploited METPlatform as “avatars” to predict response to therapy in patients with primary brain tumors.
RESULTS
We identified heat shock protein 90 (HSP90) as a promising therapeutic target for brain metastasis. DEBIO-0932, a blood-brain barrier permeable HSP90 inhibitor, shows high potency against mouse and human brain metastases from different primary origin and oncogenomic profile at clinically relevant stages of the disease, including a novel model of local relapse after neurosurgery. Furthermore, in situ proteomic analysis of brain metastases treated with the chaperone inhibitor revealed non-canonical clients of HSP90 as potential novel mediators of brain metastasis and actionable mechanisms of resistance driven by autophagy. Combined therapy using HSP90 and autophagy inhibitors showed synergistic effects compared to sublethal concentrations of each monotherapy, demonstrating the potential of METPlatform to design and test rationale combination therapies to target metastasis more effectively. Finally, we show that brain tumor PDOCs predict the response of the corresponding patient to standard of care, thus proving the potential of METPlatform for improving personalized care in cancer.
CONCLUSION
Our work validates METPlatform as a potent resource for metastasis research integrating drug-screening and unbiased omic approaches that is fully compatible with human samples and questions the rationale of excluding patients with brain metastasis from clinical trials. We envision that METPlatform will be established as a clinically relevant strategy to personalize the management of metastatic disease in the brain and elsewhere.
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Affiliation(s)
- L Zhu
- Spanish National Cancer Research Center, Madrid, Spain
| | | | - L Bertero
- University and City of Health and Science Hospital, Turin, Italy
| | - R Soffietti
- University and City of Health and Science Hospital, Turin, Italy
| | - T Weiss
- University Hospital Zurich, Zurich, Switzerland
| | - J Muñoz
- Spanish National Cancer Research Center, Madrid, Spain
| | - J Sepúlveda
- Hospital Universitario Doce de Octubre, Madrid, Spain
| | - M Weller
- University Hospital Zurich, Zurich, Switzerland
| | - J Pastor
- Spanish National Cancer Research Center, Madrid, Spain
| | - M Valiente
- Spanish National Cancer Research Center, Madrid, Spain
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Parra JL, Pastor J, Comelles F, Manresa A, Bosch P. Studies of Biosurfactants Obtained from Olive Oil / Biotenside aus Olivenöl. TENSIDE SURFACT DET 2021. [DOI: 10.1515/tsd-1990-270509] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Decarriere G, Pastor J, Demoulin D, Mouterde G, Lukas C, Combe B, Mercier G, Morel J, Daien C. OP0214 IMPACT OF A MULTI-MORBIDITY SCREENING AND PREVENTION PROGRAM IN CHRONIC INFLAMMATORY RHEUMATIC DISEASES ON THE ONE-YEAR HOSPITALIZATION RATE BASED ON AN ANALYSIS OF THE FRENCH NATIONAL HEALTH DATABASE. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.3454] [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: 11/04/2022]
Abstract
Background:A screening program for multimorbidities started in 2014 at the Montpellier University Hospital for primary prevention in patients with chronic inflammatory rheumatic diseases (IRD).Objectives:The objective of this work was to assess the impact of this program on morbidity by comparing the hospitalization rate of those patients in the year following the screening to the one of patients with IRD who did not benefit from this program.Methods:Patients with IRD who benefit from the screening program in 2015, 2016 and 2017 were identified in the French national health database PMSI and matched to 3 controls living in the same area on age, sex, type of IRD, use of intravenous (IV) biologic (b) DMARDs and index date. The exclusion criteria were subjects in secondary prevention identified as history of myocardial infarction in the previous 5 years or use of antiplatelet therapy. The primary outcome was the rate of all-cause hospitalization in the following year. The secondary endpoints were hospitalizations for another reason than IRD (“non-IRD”) including those for cardiovascular [CV] events and major fractures. Hospitalization rates were compared between the two groups in the year after screening (or index date) and also between the year preceding screening and the year after for each group. Univariate and multivariate odds ratios (CI95%) were calculated, taking into account the medical history (hypertension, diabetes, heart failure, CV disease, COPD, major fractures in the 5 years preceding the index date) and hospitalizations in the previous year.Results:486 patients were identified and matched with 1458 controls. 67.08% had rheumatoid arthritis and 21.81% spondyloarthritis; 7% of them had IV bDMARDs. Unscreened patients had more hypertension (19% vs 10.1%), diabetes (9% vs 4.9%), heart failure (2.3% vs 0.4%) and “non-IRD” hospitalizations (78.5% vs 72.2%) in the 5 years preceding the index date. In the year following the index date, the percentages of “all causes” and “non-IRD” hospitalizations were significantly higher in non-screened than in screened patients (n = 1944, 64.8% versus 51%, Chi2 test, p <0.001; and 47.1% versus 37.9%, p <0.001 respectively). 17 (1.17%) cardiovascular events occurred in non-screened versus 2 (0.41%) in screened patients (n = 1944, Chi2 test, p = 0.14). There was no difference in the occurrence of CV events or major fractures between the 2 groups. In multivariate analysis, screening was associated with a 49% (0.51 [0.41-0.64]) reduction in “all causes” hospitalization and a 27% (0, 73 [0.58-0.91]) decrease in “non-IRD” hospitalization, with no difference for CV or fracture cardiological events. The risk factors associated with “non-IRD” hospitalization were: history of “non-IRD” hospitalization in the previous year (2.26 [1.63-3.13]), IV bDMARDs (1.69 [1, 14-2.53]) and age> 70 years (1.44 [1.02-2.03] vs <50 years). Hospitalization in the previous year for “all causes” or “non-IRD” was associated with rehospitalization in the following year in the non-screened group (p <0.001), but not in the screened group (p = 0.750 and p = 0.066 respectively).Conclusion:Our screening and prevention program was associated with a reduction in hospitalizations in the following year and a decrease in the risk of re-hospitalization compared to unscreened patients with IRD. This suggests a positive impact of performing systematic screening for multi-morbidities in IRD patients.Acknowledgements:We thank Pfizer for their financial supportDisclosure of Interests:guillaume decarriere: None declared, Jenica PASTOR: None declared, David DEMOULIN: None declared, Gael Mouterde Speakers bureau: Bristol-Myers Squibb; Gilead; Janssen; Lilly; Merck; Novartis; Pfizer; Roche-Chugai; and Sanofi, Grant/research support from: Pfizer, Cédric Lukas Speakers bureau: Abbvie, Amgen, Janssen, Lilly, MSD, Novartis, Pfizer, Roche-Chugai, UCB, Consultant of: Abbvie, Amgen, Janssen, Lilly, MSD, Novartis, Pfizer, Roche-Chugai, UCB, Grant/research support from: Pfizer, Novartis and Roche-Chugai, Bernard Combe Speakers bureau: AbbVie; Bristol-Myers Squibb; Gilead; Janssen; Lilly; Merck; Novartis; Pfizer; Roche-Chugai; and Sanofi, Consultant of: AbbVie; Bristol-Myers Squibb; Gilead; Janssen; Lilly; Merck; Novartis; Pfizer; Roche-Chugai; and Sanofi, Grant/research support from: Novartis, Pfizer, and Roche-Chugai, Grégoire Mercier: None declared, Jacques Morel Speakers bureau: AbbVie; Bristol-Myers Squibb; Gilead; Janssen; Lilly; Merck; Novartis; Pfizer; Roche-Chugai; and Sanofi, Consultant of: AbbVie; Bristol-Myers Squibb; Gilead; Janssen; Lilly; Merck; Novartis; Pfizer; Roche-Chugai; and Sanofi, Grant/research support from: Novartis, Pfizer, and Roche-Chugai, Claire Daien Speakers bureau: Pfizer, Roche-Chugai, Fresenius, BMS, MSD, Lilly, Novartis, Galapagos, Consultant of: Abivax, Abbbvie, BMS, Roche-Chugai, Grant/research support from: Pfizer, roche-chugai, fresenius, MSD
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Muro-García I, Vieira A, Vega L, Pastor J, de Toledo M. [Response to perampanel in a patient with chronic post-hypoxic myoclonus]. Rev Neurol 2021; 73:111-113. [PMID: 34291448 DOI: 10.33588/rn.7303.2021098] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Chronic post-hypoxic myoclonus is a condition in which the predominant clinical picture is myoclonus following hypoxic brain damage, usually due to cardiorespiratory arrest. It is a condition that is usually treated with antiepileptic drugs, in most cases with a modest clinical response. CASE REPORT We report the case of a patient who started with jerking movements, compatible with myoclonus in the four limbs and the face the day after recovering from a cardiorespiratory arrest. An electroencephalogram was performed during which the myoclonias were recorded with no electrical correlates. During admission, and in successive visits after discharge, different antiepileptic treatments were tried for the myoclonias, which were refractory and affected the patient's quality of life. Two years after onset, treatment with perampanel up to a dose of 4 mg was initiated and the patient reported a significant clinical improvement, as evidenced in the visits. CONCLUSIONS Perampanel may be an effective alternative for the treatment of myoclonias in patients with chronic post-hypoxic myoclonus.
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Affiliation(s)
- I Muro-García
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - A Vieira
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - L Vega
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - J Pastor
- Hospital Universitario de La Princesa, 28006 Madrid, España
| | - M de Toledo
- Hospital Universitario de La Princesa, 28006 Madrid, España
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Vega-Zelaya L, Ezquiaga E, Giogi González M, Pastor J. An induction test employing nonphysiologic manoeuvres for the diagnosis of a functional movement disorder. Neurología (English Edition) 2020. [DOI: 10.1016/j.nrleng.2019.03.010] [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: 11/17/2022] Open
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Pastor J, Libánský P, Adámek S, Lischke R, Naňka O. History of thyroid surgery. Rozhl Chir 2020; 99:476-480. [PMID: 33445944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The authors present an outline of the development of thyroid surgery from the ancient times to the beginning of the 20th century, when the defini-tive surgical technique have been developed and the physiologic and pathopfysiologic consequences of thyroid resections have been described. The key representatives, as well as the contribution of the most influential czech surgeons are mentioned.
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Evangelista T, Labasse C, Beuvin M, Brochier G, Madelaine A, Pastor J, Romero N. CONGENITAL MYOPATHIES: RYR1 AND TITIN. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.343] [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: 10/25/2022]
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Bravo C, Nuñez M, Pastor J, Moya S, Campos L, Valenzuela A, Moscoso C, Palma C, Barrientos G. Mandibular condylar hyperplasia: clinical, histopathologic and demographic consideration in a series of 13 cases, retrospective study. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.851] [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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Sanz-Garcia A, Perez-Romero M, Pastor J, Sola RG, Vega-Zelaya L, Monasterio F, Torrecilla C, Vega G, Pulido-Rivas P, Ortega GJ. [Is it possible to extract intracranial pressure information based on the EEG activity?]. Rev Neurol 2019; 68:375-383. [PMID: 31017290 DOI: 10.33588/rn.6809.2018179] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The capability of the electroencephalography (EEG) of recording the bioelectrical activity of the brain has made of it a fundamental tool for the evaluation of the patient's neurological condition. In recent years, moreover, it has also begun to be used in obtaining information for other kind of variables, as the ones related with the cerebral hemodynamics. AIM To study the potential relationship between the EEG activity and the intracranial pressure (ICP) in patients suffering from traumatic brain injury and subarachnoid hemorrhage, during their stay at the intensive care unit. PATIENTS AND METHODS Twenty-one adult patients (10 women) were included in the present observational prospective cohort study. They suffered from either traumatic brain injury or subarachnoid hemorrhage, requiring continuous EEG and ICP monitoring. In every patient, Granger causality between spectral functions of the EEG and the ICP was evaluated. Temporal windows of 10 minute were used to evaluate whether a causal relationship between those variables exist or not. In all of the cases, several days of continuous recording and assessment were performed. RESULTS In most patients and during most of the time, Granger causality turns out to be significant in the direction from the EEG to the ICP, meaning that the EEG dynamics actually leads the ICP dynamics. CONCLUSIONS The present work provides useful information and shed light in discovering a hidden relationship between the ICP and EEG dynamics. The potential use of this relationship could lead to develop a medical device to measure ICP in a non-invasive fashion.
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Affiliation(s)
- A Sanz-Garcia
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - M Perez-Romero
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - J Pastor
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - R G Sola
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - L Vega-Zelaya
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - F Monasterio
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - C Torrecilla
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - G Vega
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - P Pulido-Rivas
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - G J Ortega
- Hospital Universitario de la Princesa, Madrid, Espana
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Hervás A, Pastor J, González C, Jové J, Gómez A, Casaña M, Villafranca E, Mengual JL, Muñoz V, Henriquez I, Muñoz J, Collado E, Clemente J. Outcomes and prognostic factors in intermediate-risk prostate cancer: multi-institutional analysis of the Spanish RECAP database. Clin Transl Oncol 2018; 21:900-909. [PMID: 30536208 DOI: 10.1007/s12094-018-02000-y] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/24/2018] [Indexed: 01/05/2023]
Abstract
PURPOSE To retrospectively assess outcomes and to identify prognostic factors in patients diagnosed with intermediate-risk (IR) prostate cancer (PCa) treated with primary external beam radiotherapy (EBRT). MATERIALS AND METHODS Data were obtained from the multi-institutional Spanish RECAP database, a population-based prostate cancer registry in Spain. All IR patients (NCCN criteria) who underwent primary EBRT were included. The following variables were assessed: age; prostate-specific antigen (PSA); Gleason score; clinical T stage; percentage of positive biopsy cores (PPBC); androgen deprivation therapy (ADT); and radiotherapy dose. The patients were stratified into one of three risk subcategories: (1) favourable IR (FIR; GS 6, ≤ T2b or GS 3 + 4, ≤ T1c), (2) marginal IR (MIR; GS 3 + 4, T2a-b), and (3) unfavourable IR (UIR; GS 4 + 3 or T2c). Biochemical relapse-free survival (BRFS), disease-free survival (DFS), cancer-specific survival (CSS), and overall survival (OS) were assessed. RESULTS A total of 1754 patients from the RECAP database were included and stratified by risk group: FIR, n = 781 (44.5%); MIR, n = 252 (14.4%); and UIR, n = 721 (41.1%). Mean age was 71 years (range 47-86). Mean PSA was 10.4 ng/ml (range 6-20). The median radiotherapy dose was 74 Gy, with mean doses of 72.5 Gy (FIR), 73.4 Gy (MIR), and 72.8 Gy (UIR). Most patients (88%) received ADT for a median of 7.1 months. By risk group (FIR, MIR, UIR), ADT rates were, respectively, 88.9, 86.5, and 86.9%. Only patients with ≥ 24 months of follow-up post-EBRT were included in the survival analysis (n = 1294). At a median follow-up of 52 months (range 24-173), respective 5- and 10-year outcomes were: OS 93.6% and 79%; BRFS 88.9% and 71.4%; DFS 96.1% and 89%; CSS 98.9% and 94.6%. Complication rates (≥ grade 3) were: acute genitourinary (GU) 2%; late GU 1%; acute gastrointestinal (GI) 2%; late GI 1%. There was no significant association between risk group and BRFS or OS. However, patients with favourable-risk disease had significantly better 5- and 10-year DFS than patients with UIR: 98.7% vs. 92.4% and 92% vs. 85.8% (p = 0.0005). CSS was significantly higher (p = 0.0057) in the FIR group at 5 (99.7% vs. 97.3%) and 10 years (96.1% vs. 93.4%). On the multivariate analyses, the following were significant predictors of survival: ADT (BRFS and DFS); dose ≥ 74 Gy (BRFS); age (OS). CONCLUSIONS This is the first nationwide study in Spain to report long-term outcomes of patients with intermediate-risk PCa treated with EBRT. Survival outcomes were good, with a low incidence of both acute and late toxicity. Patients with unfavourable risk characteristics had significantly lower 5- and 10-year disease-free survival rates. ADT and radiotherapy dose ≥ 74 Gy were both significant predictors of treatment outcomes.
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Affiliation(s)
- A Hervás
- Department of Radiation Oncology, Hospital Ramón y Cajal, Madrid, Spain.
| | - J Pastor
- Department of Radiation Oncology, Hospital General de Valencia, Valencia, Spain
| | - C González
- Department of Radiation Oncology, Hospital Gregorio Marañón, Madrid, Spain
| | - J Jové
- Department of Radiation Oncology, Hospital Germans Trias i Pujol, Barcelona, Spain
| | - A Gómez
- Department of Radiation Oncology, Hospital Clínico Universitario, Santiago de Compostela, Spain
| | - M Casaña
- Department of Radiation Oncology, Instituto Valenciano de Oncologia, Valencia, Spain
| | - E Villafranca
- Department of Radiation Oncology, Hospital Clínico Universitario, Pamplona, Spain
| | - J L Mengual
- Department of Radiation Oncology, Instituto Valenciano de Oncologia, Valencia, Spain
| | - V Muñoz
- Department of Radiation Oncology, Hospital do Mixoeiro, Vigo, Spain
| | - I Henriquez
- Department of Radiation Oncology, Hospital Universitario Sant Joan, Reus, Spain
| | - J Muñoz
- Department of Radiation Oncology, Hospital Infanta Cristina, Badajoz, Spain
| | - E Collado
- Department of Radiation Oncology, Hospital Uiversitario La Fe, Valencia, Spain
| | - J Clemente
- Department of Radiation Oncology, Instituto Valenciano de Oncologia, Alcoy, Spain
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Lin S, Stoll B, Robinson J, Pastor J, Cruz S, Lau P, Marini J, Ipharraguerre I, Hartmann B, Holst J, Olutoye O, Fang Z, Burrin D. PSXI-33 Differential Action of TGR5 Agonists on GLP-2. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Lin
- Institute of Animal Nutrition, Sichuan Agricultural University,Chengdu, China (People’s Republic)
| | - B Stoll
- USDA-ARS Children’s Nutrition Research Center, Baylor College of Medicine,Houston, TX, United States
| | - J Robinson
- USDA-ARS Children’s Nutrition Research Center, Baylor College of Medicine,Houston, TX, United States
| | | | - S Cruz
- Texas Children’s Hospital, Division of Pediatric Surgery, Baylor College of Medicine,Houston, TX, United States
| | - P Lau
- Texas Children’s Hospital, Division of Pediatric Surgery, Baylor College of Medicine,Houston, TX, United States
| | - J Marini
- USDA-ARS Children’s Nutrition Research Center, Critical Care Medicine, Baylor College of Medicine,Houston, TX, United States
| | - I Ipharraguerre
- Institute of Human Nutrition and Food Science, University of Kiel,Kiel, Germany
| | - B Hartmann
- Department of Biomedical Sciences, and NNF Center for Basic Metabolic Research, University of Copenhagen,Copenhagen, Denmark
| | - J Holst
- Department of Biomedical Sciences, and NNF Center for Basic Metabolic Research, University of Copenhagen,Copenhagen, Denmark
| | - O Olutoye
- Texas Children’s Hospital, Division of Pediatric Surgery, Baylor College of Medicine,Houston, TX, United States
| | - Z Fang
- Institute of Animal Nutrition, Sichuan Agricultural University, Ya’an, China
| | - D Burrin
- USDA-ARS Children’s Nutrition Research Center, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Baylor College of Medicine,Houston, TX, United States
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Meléndez-Lazo A, Ordeix L, Planellas M, Pastor J, Solano-Gallego L. Clinicopathological findings in sick dogs naturally infected with Leishmania infantum : Comparison of five different clinical classification systems. Res Vet Sci 2018; 117:18-27. [DOI: 10.1016/j.rvsc.2017.10.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 10/29/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
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Torres CV, Lopez-Manzanares L, Navas-Garcia M, Pastor J, Vega-Zelaya L, Garcia-Pallero MA, Sola RG. [Bilateral two-stage implantation for deep brain stimulation in the treatment of bilateral idiopathic Parkinson's disease: clinical outcomes]. Rev Neurol 2018; 66:1-6. [PMID: 29251336] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
AIMS Simultaneous bilateral implantation of electrodes in the subthalamic nucleus for idiopathic Parkinson's disease (IPD) is associated with long surgery time, language disorders and post-operative confusion. Moreover, there is evidence of ipsilateral improvement after stimulation of the subthalamic nucleus. In order to optimise perioperative management a prospective study is conducted with deep brain stimulation (DBS) in the subthalamic nucleus in two consecutive unilateral procedures. PATIENTS AND METHODS We conducted a prospective study of 41 patients with bilateral IPD, with DBS implantation in two unilateral surgical phases. Its clinical outcomes are analysed according to the Unified Parkinson's Disease Rating Scale (UPDRS), the Hoehn and Yahr, and the Schwab and England scales, together with their complications. RESULTS The mean age was 61 ± 7 years old, 23 males. Five patients (12%) did not undergo surgery of the contralateral subthalamic nucleus due to good control. The mean on the motor UPDRS and the Hoehn and Yahr in preoperative pharmacological off was 44 ± 14 and 3, respectively, and 19 ± 8 and 1.8 at six months' follow-up. The mean improvement on the Schwab and England scale in the pre-operative period and at six months was 39%. Two patients suffered post-operative confusion, and one of them had transient dysarthria. CONCLUSIONS Bilateral DBS in two unilateral stages was an effective option with few complications in our series of patients with IPD. 10% of the patients did not require contralateral electrodes. It would be necessary to conduct a randomised study in patients who underwent bilateral surgery in one and two stages in order to confirm these results.
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Affiliation(s)
- C V Torres
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | | | - M Navas-Garcia
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - J Pastor
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - L Vega-Zelaya
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | | | - R G Sola
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
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Vega-Zelaya L, Torres CV, Navas-Garcia M, Sola RG, Pastor J. [New thalamic potential associated with somatosensory evoked potentials]. Rev Neurol 2017; 65:322-326. [PMID: 28929474] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
INTRODUCTION The response of the thalamus during the study with somatosensory evoked potentials (SSEP) is not sufficiently understood. CASE REPORT A 17-year-old man undergoing surgery for deep brain stimulation in the centromedian nucleus for drug-resistant epilepsy under complete sedation. During the intervention, the responses to SSEPs of the thalamic nuclei were recorded by means of four microelectrodes. These responses can be decomposed into three types: local field potentials (LFP), low amplitude fast oscillations (LFO), and high amplitude slow oscillations (HSO). LFO are widespread in much of the registered regions. However, HSOs are located at a single point in the registry and are closely associated with LFPs. CONCLUSIONS Although the presence of LFO has been considered as an indicator of the presence of the sensory thalamus, its wide extension by different thalamic nuclei suggests that it is an unspecific response to SSEPs. However, the restricted spatial location of HSO and their association with LFP suggest that these newly described potentials are the markers for the presence of the sensory thalamus. Their identification may prove very useful in thalamic deep brain stimulation either in awake patients or especially in those requiring sedation.
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Affiliation(s)
- L Vega-Zelaya
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - C V Torres
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - M Navas-Garcia
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - R G Sola
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - J Pastor
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
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Hervás A, Gómez-Caamaño A, Casaña M, Gómez-Iturriaga A, Pastor J, Jove J, Mengual JL, Gónzalez-San Segundo C, Muñoz J. Adjuvant versus salvage radiotherapy in prostate cancer: multi-institutional retrospective analysis of the Spanish RECAP database. Clin Transl Oncol 2017; 20:193-200. [PMID: 28667448 DOI: 10.1007/s12094-017-1709-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 04/07/2017] [Accepted: 06/20/2017] [Indexed: 12/20/2022]
Abstract
PURPOSE To compare adjuvant radiotherapy (ART) to salvage radiotherapy (SRT) after radical prostatectomy (RP) in a cohort of prostate cancer (PCa) patients. The primary aim was to comparatively assess 2- and 5-year biochemical relapse-free survival (BRFS). A secondary aim was to identify predictors of survival. PATIENTS AND METHODS Data were acquired from the RECAP database, a population-based prostate cancer registry in Spain. Inclusion criteria included RP (with or without lymphadenectomy) followed by ART or SRT. A total of 702 patients were analyzed. Pre-RT PSA values (>0.5 vs. ≤0.5 ng/ml), pathological stage (T1-2 vs. T3-4), post-surgical Gleason score (≤7 vs. 8-10), margin status (positive vs. negative), hormonal treatment (yes vs. no), and RT dose (≤66 Gy vs. >66 Gy) were evaluated to assess their impact on BRFS. RESULTS The mean patient age in the ART and SRT groups, respectively, was 64 years (range 42-82) and 64.8 years (range 42-82). Median follow-up after RT in the whole sample was 34 months (range 3-141). A total of 702 patients were included: 223 (31.8%) received ART and 479 (68.2%) SRT. BRFS rates (95% CI) in the ART and SRT groups at months 24 and 60 were, respectively: 98.1% (95.9-100.0%) vs. 91.2% (88.2-94.2%) and 84.5% (76.4-92.6%) vs. 74.0% (67.4-80.7%) (p = 0.004). No significant differences in OS were observed (p = 0.053). The following variables were significant predictors of biochemical recurrence in the SRT group: (1) positive surgical margin status (p = 0.049); (2) no hormonotherapy (p = 0.03); (3) total prostate dose ≤66 Gy (p = 0.004); and pre-RT PSA ≥0.5 ng/ml (p = 0.013). CONCLUSIONS This is the first nationwide study in Spain to evaluate a large cohort of PCa patients treated with RP followed by postoperative RT. ART yielded better 2- and 5-year BRFS rates, although OS was equivalent. These findings are consistent with most other published studies and support ART in patients with adverse prognostic characteristics after radical prostatectomy. Prospective trials are needed to compare immediate ART to early SRT to better determine their relative benefits.
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Affiliation(s)
- A Hervás
- Department of Radiation Oncology, Hospital Ramón Y Cajal, Madrid, Spain.
| | - A Gómez-Caamaño
- Department of Radiation Oncology, Hospital Clínico Universitario, Santiago de Compostela, Spain
| | - M Casaña
- Department of Radiation Oncology, Instituto Valenciano de Oncologia, Valencia, Spain
| | - A Gómez-Iturriaga
- Department of Radiation Oncology, Hospital Universitario Cruces, Barakaldo, Spain
| | - J Pastor
- Department of Radiation Oncology, Hospital General de Valencia, Valencia, Spain
| | - J Jove
- Department of Radiation Oncology, Hospital Germans Trias i Pujol, Barcelona, Spain
| | - J L Mengual
- Department of Radiation Oncology, Instituto Valenciano de Oncologia, Valencia, Spain
| | | | - J Muñoz
- Department of Radiation Oncology, Hospital Infanta Cristina, Badajoz, Spain
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Sanz-Garcia A, Vega-Zelaya L, Pastor J, Sola RG, Ortega GJ. [When does post-ictal period start in temporal lobe epilepsy? A quantitative EEG perspective]. Rev Neurol 2017; 64:337-346. [PMID: 28368080] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
INTRODUCTION In partial seizures, from a clinical point of view or even from electroencephalography characterization of post-ictal period can be difficult. The spectral and complex network analysis could lead to a more accurate definition of its limits, as well as to a great understanding of the seizures. PATIENTS AND METHODS Digital EEG recordings from scalp and foramen oval electrodes were used, 32 seizures, from 15 patients with drug-resistant mesial temporal lobe epilepsy (Engel I). We analyzed numerically: the spectral entropy, the different frequency bands and several variables used to characterize the cortical network, density of links, modularity, cluster coefficient and average path length. Variations of for post-ictal versus pre-ictal periods were quantified. RESULTS The cortical network density of links increased during the post-ictal period of complex seizures matching with an spectral entropy decrease, mainly due to an increase in Delta band activity. This variables reached extreme values around one minute after seizure end, defined by classical electroencephalography. CONCLUSIONS Our results can be explained by the appearance of an 'ending' mechanism that starts in the ictal period, classically defined, and reach their maximum effect during the post-ictal period. These results could be useful to define the post-ictal period start, as the moment with maximum synchrony, which has a highest density of links and a lowest spectral entropy.
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Affiliation(s)
- A Sanz-Garcia
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - L Vega-Zelaya
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - J Pastor
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - R G Sola
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
| | - G J Ortega
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
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Vilalta L, Meléndez-Lazo A, Doria G, Ramis A, Solano-Gallego L, Pastor J, Martorell J. Clinical, Cytological, Histological and Immunohistochemical Features of Cutaneous Mast Cell Tumours in Ferrets ( Mustela putorius furo ). J Comp Pathol 2016; 155:346-355. [DOI: 10.1016/j.jcpa.2016.07.012] [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] [Received: 07/05/2016] [Revised: 07/22/2016] [Accepted: 07/27/2016] [Indexed: 10/21/2022]
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Silvestrini P, Batchelor D, Allenspach K, Maunder C, Seth M, Mas A, Hill T, Serrano G, Roura X, Planellas M, German AJ, Pastor J. Clinical leishmaniasis in dogs living in the UK. J Small Anim Pract 2016; 57:453-8. [PMID: 27251904 DOI: 10.1111/jsap.12503] [Citation(s) in RCA: 11] [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: 07/19/2015] [Revised: 03/15/2016] [Accepted: 03/18/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To investigate the prevalence of leishmaniasis in dogs in the UK and to describe clinical presentation, clinicopathological abnormalities, therapeutic protocols and outcome in this non-endemic country. MATERIALS AND METHODS Medical records of dogs diagnosed with leishmaniasis at seven referral centres in the UK were retrospectively reviewed. RESULTS The prevalence was between 0·007 and 0·04% with a higher number of cases in southern England. All dogs had a history of travel to or from an endemic country. Lethargy, dermatological disease, decreased appetite and lameness were the most common reasons for presentation. Allopurinol was used alone for treatment in the majority of cases. CLINICAL SIGNIFICANCE Although rare, leishmaniasis should be considered in dogs in the UK if they have compatible clinical signs and history of travel to or from endemic areas.
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Affiliation(s)
- P Silvestrini
- Department of Small Animal Internal Medicine, School of Veterinary Science, University of Liverpool, Neston CH64 7TE
| | - D Batchelor
- Department of Small Animal Internal Medicine, School of Veterinary Science, University of Liverpool, Neston CH64 7TE
| | - K Allenspach
- Department of Veterinary Clinical Services, Royal Veterinary College of London, North Mymms, Herts NW1 0TU
| | - C Maunder
- Department of Small Animal Medicine, University of Bristol, Bristol, North Somerset BS40 5DU
| | - M Seth
- Department of Small Animal Internal Medicine, Animal Health Trust, Newmarket, Suffolk CB8 7UU
| | - A Mas
- Anderson Moores Veterinary Specialists Ltd, Winchester SO212LL
| | - T Hill
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh EH25 9RG
| | - G Serrano
- Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES
| | - X Roura
- Hospital Clinic Veterinari, Universitat Autonoma de Barcelona, 08193 Barcelona, Spain
| | - M Planellas
- Hospital Clinic Veterinari, Universitat Autonoma de Barcelona, 08193 Barcelona, Spain
| | - A J German
- Department of Small Animal Internal Medicine, School of Veterinary Science, University of Liverpool, Neston CH64 7TE
| | - J Pastor
- Hospital Clinic Veterinari, Universitat Autonoma de Barcelona, 08193 Barcelona, Spain
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Torres M, Pastor J, Roura X, Tabar MD, Espada Y, Font A, Balasch J, Planellas M. Adverse urinary effects of allopurinol in dogs with leishmaniasis. J Small Anim Pract 2016; 57:299-304. [DOI: 10.1111/jsap.12484] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 12/23/2015] [Accepted: 02/18/2016] [Indexed: 01/07/2023]
Affiliation(s)
- M. Torres
- Servei d'Urgències i Medecina Interna, Hospital Veterinari Balmes; Carrer Balmes 81 08008 Barcelona Spain
| | - J. Pastor
- Hospital Clínic Veterinari and Animal Medicine and Surgery Department, Faculty of Veterinary Medicine; Universitat Autònoma de Barcelona; Campus de la UAB, Plaza Cívica 08193 Bellaterra Spain
| | - X. Roura
- Hospital Clínic Veterinari and Animal Medicine and Surgery Department, Faculty of Veterinary Medicine; Universitat Autònoma de Barcelona; Campus de la UAB, Plaza Cívica 08193 Bellaterra Spain
| | - M. D. Tabar
- Servicio de Medicina Interna, Centro Policlínico Veterinario Raspeig, Calle Veterinario Manuel Isidro Rodríguez Rodriguez; 17, 03690, San Vicente del Raspeig Alicante Spain
| | - Y. Espada
- Hospital Clínic Veterinari and Animal Medicine and Surgery Department, Faculty of Veterinary Medicine; Universitat Autònoma de Barcelona; Campus de la UAB, Plaza Cívica 08193 Bellaterra Spain
| | - A. Font
- Servei de Medecina Interna, Hospital Ars Veterinària; Carrer Cardedeu 3 08023 Barcelona Spain
| | - J. Balasch
- Servei d'Urgències i Medecina Interna, Hospital Veterinari Balmes; Carrer Balmes 81 08008 Barcelona Spain
| | - M. Planellas
- Hospital Clínic Veterinari and Animal Medicine and Surgery Department, Faculty of Veterinary Medicine; Universitat Autònoma de Barcelona; Campus de la UAB, Plaza Cívica 08193 Bellaterra Spain
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Aragoneses-Fenoll L, Montes-Casado M, Ojeda G, Acosta YY, Herranz J, Martínez S, Blanco-Aparicio C, Criado G, Pastor J, Dianzani U, Portolés P, Rojo JM. ETP-46321, a dual p110α/δ class IA phosphoinositide 3-kinase inhibitor modulates T lymphocyte activation and collagen-induced arthritis. Biochem Pharmacol 2016; 106:56-69. [PMID: 26883061 DOI: 10.1016/j.bcp.2016.02.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 02/11/2016] [Indexed: 11/29/2022]
Abstract
Class IA phosphoinositide 3-kinases (PI3Ks) are essential to function of normal and tumor cells, and to modulate immune responses. T lymphocytes express high levels of p110α and p110δ class IA PI3K. Whereas the functioning of PI3K p110δ in immune and autoimmune reactions is well established, the role of p110α is less well understood. Here, a novel dual p110α/δ inhibitor (ETP-46321) and highly specific p110α (A66) or p110δ (IC87114) inhibitors have been compared concerning T cell activation in vitro, as well as the effect on responses to protein antigen and collagen-induced arthritis in vivo. In vitro activation of naive CD4(+) T lymphocytes by anti-CD3 and anti-CD28 was inhibited more effectively by the p110δ inhibitor than by the p110α inhibitor as measured by cytokine secretion (IL-2, IL-10, and IFN-γ), T-bet expression and NFAT activation. In activated CD4(+) T cells re-stimulated through CD3 and ICOS, IC87114 inhibited Akt and Erk activation, and the secretion of IL-2, IL-4, IL-17A, and IFN-γ better than A66. The p110α/δ inhibitor ETP-46321, or p110α plus p110δ inhibitors also inhibited IL-21 secretion by differentiated CD4(+) T follicular (Tfh) or IL-17-producing (Th17) helper cells. In vivo, therapeutic administration of ETP-46321 significantly inhibited responses to protein antigen as well as collagen-induced arthritis, as measured by antigen-specific antibody responses, secretion of IL-10, IL-17A or IFN-γ, or clinical symptoms. Hence, p110α as well as p110δ Class IA PI3Ks are important to immune regulation; inhibition of both subunits may be an effective therapeutic approach in inflammatory autoimmune diseases like rheumatoid arthritis.
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Affiliation(s)
- L Aragoneses-Fenoll
- Unidad de Inmunología Celular, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - M Montes-Casado
- Unidad de Inmunología Celular, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - G Ojeda
- Unidad de Inmunología Celular, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Y Y Acosta
- Departamento de Medicina Celular y Molecular, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - J Herranz
- Departamento de Medicina Celular y Molecular, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - S Martínez
- Experimental Therapeutics Programme, Spanish National Cancer Research Centre (CNIO), Spain
| | - C Blanco-Aparicio
- Experimental Therapeutics Programme, Spanish National Cancer Research Centre (CNIO), Spain
| | - G Criado
- Hospital 12 de Octubre, Instituto de Investigación Hospital 12 de Octubre (I+12), E-28041 Madrid, Spain
| | - J Pastor
- Experimental Therapeutics Programme, Spanish National Cancer Research Centre (CNIO), Spain
| | - U Dianzani
- Interdisciplinary Research Center of Autoimmune Diseases (IRCAD) and Department of Health Sciences, University of Piemonte Orientale (UPO), Novara, Italy
| | - P Portolés
- Unidad de Inmunología Celular, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain.
| | - J M Rojo
- Departamento de Medicina Celular y Molecular, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain.
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Menachem A, Bodner O, Pastor J, Raz A, Kloog Y. Inhibition of malignant thyroid carcinoma cell proliferation by Ras and galectin-3 inhibitors. Cell Death Discov 2015; 1:15047. [PMID: 27551476 PMCID: PMC4979473 DOI: 10.1038/cddiscovery.2015.47] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 08/23/2015] [Revised: 09/02/2015] [Accepted: 09/08/2015] [Indexed: 12/13/2022] Open
Abstract
Anaplastic Thyroid carcinoma is an extremely aggressive solid tumor that resists most treatments and is almost always fatal. Galectin-3 (Gal-3) is an important marker for thyroid carcinomas and a scaffold of the K-Ras protein. S-trans, transfarnesylthiosalicylic acid (FTS; Salirasib) is a Ras inhibitor that inhibits the active forms of Ras proteins. Modified citrus pectin (MCP) is a water-soluble citrus-fruit-derived polysaccharide fiber that specifically inhibits Gal-3. The aim of this study was to develop a novel drug combination designed to treat aggressive anaplastic thyroid carcinoma. Combined treatment with FTS and MCP inhibited anaplastic thyroid cells proliferation in vitro by inducing cell cycle arrest and increasing apoptosis rate. Immunoblot analysis revealed a significant decrease in Pan-Ras, K-Ras, Ras-GTP, p-ERK, p53, and Gal-3 expression levels and significant increase in p21 expression levels. In nude mice, treatment with FTS and MCP inhibited tumor growth. Levels of Gal-3, K-Ras-GTP, and p-ERK were significantly decreased. To conclude, our results suggest K-Ras and Gal-3 as potential targets in anaplastic thyroid tumors and herald a novel treatment for highly aggressive anaplastic thyroid carcinoma.
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Affiliation(s)
- A Menachem
- Department of Neurobiology, The George S. Wise Faculty of Life Sciences, Tel Aviv University , Tel Aviv, Israel
| | - O Bodner
- Department of Neurobiology, The George S. Wise Faculty of Life Sciences, Tel Aviv University , Tel Aviv, Israel
| | - J Pastor
- Department of Neurobiology, The George S. Wise Faculty of Life Sciences, Tel Aviv University , Tel Aviv, Israel
| | - A Raz
- The Departments of Oncology and Pathology, School of Medicine, The Karmanos Cancer Institute, Wayne State University , Detroit, MI, USA
| | - Y Kloog
- Department of Neurobiology, The George S. Wise Faculty of Life Sciences, Tel Aviv University , Tel Aviv, Israel
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Torres CV, Pastor J, Garcia-Navarrete E, Pulido-Rivas P, Sola RG. Classification of structural lesions in magnetic resonance imaging. Surgical implications in drug-resistant epilepsy patients. Rev Neurol 2015; 61:241-248. [PMID: 26350774] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
INTRODUCTION The presence of a structural lesion in the preoperative magnetic resonance imaging (MRI) of drug-resistant epilepsy patients has been usually associated with a favourable surgical outcome. We present our experience in our Epilepsy Surgery Unit. PATIENTS AND METHODS Clinical records from 265 patients, operated on from 1990-2010 in our institution, were reviewed. Patients were classified, according to MRI findings, into three groups: surgical lesion (SL), tumors or vascular malformations requiring surgery 'per se'; orientative lesion (OL), dysplasia, atrophy or mesial temporal sclerosis; and (NL) group, with normal MRI. Seizure outcomes were analysed in relation to this classification. RESULTS Period 1990-2000, 151 patients: 87% of SL, 65% of OL and 57% of NL patients were in Engel class I or II at the two-year follow-up. Among temporal lobe epilepsy cases (TLE), 87% of SL, 67% of OL and 56% of NL patients achieved seizure control. Differences were statistically significative. Period 2001-2010, 114 patients: 100% of SL, 90% of OL, and 81% of NL patients were in Engel's class I or II. Both TLE and extratemporal (ETLE) SL patients obtained a 100% seizure control. Among the OL patients, 95% with TLE and 43% of ETLE achieved seizure control. In the NL group, the percentages were 88% in TLE, and 50% in ETLE. CONCLUSIONS In our series, SL was a predictor of a favorable outcome. In TLE patients, good results were achieved despite normal MRI. Patients with ETLE and NL did not have a worse outcome than those with OL. A classification in SL, OL and NL seems more helpful for predicting the surgical outcome than the traditional classification lesion versus non-lesion MRI. Radiological findings must be carefully evaluated in the context of a complete epilepsy surgery evaluation.
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Affiliation(s)
- C V Torres
- Hospital Universitario de la Princesa, 28006 Madrid, Espana
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Cassoudesalle H, Scannella S, Pariente J, Lotterie J, Celsis P, Castel-Lacanal E, Marque P, De Boissezon X, Pastor J. The behavioral and electrophysiological effects of posterior parietal cortex damage in spatial audio-visual conflict. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Rüb J, Rehmann R, von Landenberg N, Roghmann F, Stude P, Tegenthoff M, Noldus J, Pastor J. [Segmental testicular infarction. Unusual complication of intravenous immunoglobulin therapy for multifocal motor neuropathy]. Urologe A 2015; 54:1421-4. [PMID: 26303740 DOI: 10.1007/s00120-015-3941-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We describe the previously unknown case of segmental testicular infarction as an iatrogenic complication of intravenous immunoglobulin administration in a patient with multifocal motor neuropathy.
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Affiliation(s)
- J Rüb
- Klinik für Urologie und Neurourologie, Marien-Hospital Herne, Ruhr-Universität Bochum, Widumer Straße 8, 44627, Herne, Deutschland.
| | - R Rehmann
- Neurologische Klinik, Ruhr-Universität Bochum, BG-Universitätsklinikum Bergmannsheil Bochum, Bochum, Deutschland
| | - N von Landenberg
- Klinik für Urologie und Neurourologie, Marien-Hospital Herne, Ruhr-Universität Bochum, Widumer Straße 8, 44627, Herne, Deutschland
| | - F Roghmann
- Klinik für Urologie und Neurourologie, Marien-Hospital Herne, Ruhr-Universität Bochum, Widumer Straße 8, 44627, Herne, Deutschland
| | - P Stude
- Neurologische Klinik, Ruhr-Universität Bochum, BG-Universitätsklinikum Bergmannsheil Bochum, Bochum, Deutschland
| | - M Tegenthoff
- Neurologische Klinik, Ruhr-Universität Bochum, BG-Universitätsklinikum Bergmannsheil Bochum, Bochum, Deutschland
| | - J Noldus
- Klinik für Urologie und Neurourologie, Marien-Hospital Herne, Ruhr-Universität Bochum, Widumer Straße 8, 44627, Herne, Deutschland
| | - J Pastor
- Klinik für Urologie und Neurourologie, Marien-Hospital Herne, Ruhr-Universität Bochum, Widumer Straße 8, 44627, Herne, Deutschland
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Pastor J, Pádr R. [Using a stent graft in the treatment of hepatic artery bleeding after pancreatoduodenectomy]. Rozhl Chir 2015; 94:256-260. [PMID: 26174346] [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
Delayed bleeding is a potential complication of pancreatoduodenectomy. Its treatment is either endovascular or surgical (stentgraft, embolization). Our case report presents a patient with bleeding from the hepatic artery pseudoaneurysm within a period of 3 months after pancreatoduodenectomy for common bile duct carcinoma, resolved using a stent graft.
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Tajuelo J, Pastor JM, Martínez-Pedrero F, Vázquez M, Ortega F, Rubio RG, Rubio MA. Magnetic microwire probes for the magnetic rod interfacial stress rheometer. Langmuir 2015; 31:1410-1420. [PMID: 25495270 DOI: 10.1021/la5038316] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The magnetic needle interfacial shear rheometer is a valuable tool for the study of the mechanical properties of thin fluid films or monolayers. However, it is difficult to differentiate the interfacial and subphase contributions to the drag on the needle. In principle, the problem can be addressed by decreasing the needle diameter, which decreases the bulk contribution while the interfacial contribution remains essentially the same. Here we show the results obtained when using a new type of needle, that of magnetic microwires with diameter approximately 10 times thinner than for commercial needles. We show that the lower inertia of the microwires calls for a new calibration procedure. We propose such a new calibration procedure based on the flow field solution around the needle introduced in refs 1 and 2. By measuring thin silicone oil films with well-controlled interfacial viscosities as well as eicosanol (C20) and pentadecanoic acid (PDA, C15) Langmuir monolayers, we show that the new calibration method works well for standard needles as well as for the microwire probes. Moreover, we show that the analysis of the force terms contributing to the force on the needle helps to ascertain whether the measurements obtained are reliable for given surface shear viscosity values. We also show that the microwire probes have at least a 10-fold-lower resolution limit, allowing one to measure interfacial viscosities as low as 10(-7) N·m/s.
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Affiliation(s)
- J Tajuelo
- Departamento de Física Fundamental, Universidad Nacional de Educación a Distancia , 28040 Madrid, Spain
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Garcimartín A, Pastor JM, Ferrer LM, Ramos JJ, Martín-Gómez C, Zuriguel I. Flow and clogging of a sheep herd passing through a bottleneck. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 91:022808. [PMID: 25768553 DOI: 10.1103/physreve.91.022808] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Indexed: 06/04/2023]
Abstract
We present an experimental study of a flock passing through a narrow door. Video monitoring of daily routines in a farm has enabled us to collect a sizable amount of data. By measuring the time lapse between the passage of consecutive animals, some features of the flow regime can be assessed. A quantitative definition of clogging is demonstrated based on the passage time statistics. These display broad tails, which can be fitted by power laws with a relatively large exponent. On the other hand, the distribution of burst sizes robustly evidences exponential behavior. Finally, borrowing concepts from granular physics and statistical mechanics, we evaluate the effect of increasing the door size and the performance of an obstacle placed in front of it. The success of these techniques opens new possibilities regarding their eventual extension to the management of human crowds.
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Affiliation(s)
- A Garcimartín
- Depto. de Física y Mat. Apl., Fac. Ciencias, Universidad de Navarra, 31080 Pamplona, Spain
| | - J M Pastor
- Depto. de Física y Mat. Apl., Fac. Ciencias, Universidad de Navarra, 31080 Pamplona, Spain
| | - L M Ferrer
- Dpto. de Patología Animal, Fac. Veterinaria, Universidad de Zaragoza, c/ Miguel Servet 177, 50013 Zaragoza, Spain
| | - J J Ramos
- Dpto. de Patología Animal, Fac. Veterinaria, Universidad de Zaragoza, c/ Miguel Servet 177, 50013 Zaragoza, Spain
| | - C Martín-Gómez
- Sección de Instalaciones y Energía, Escuela de Arquitectura, Universidad de Navarra, 31080 Pamplona, Spain
| | - I Zuriguel
- Depto. de Física y Mat. Apl., Fac. Ciencias, Universidad de Navarra, 31080 Pamplona, Spain
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Tvarijonaviciute A, García-Martínez JD, Caldin M, Martínez-Subiela S, Tecles F, Pastor J, Ceron JJ. Serum paraoxonase 1 (PON1) activity in acute pancreatitis of dogs. J Small Anim Pract 2014; 56:67-71. [DOI: 10.1111/jsap.12297] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 09/04/2014] [Accepted: 09/22/2014] [Indexed: 12/22/2022]
Affiliation(s)
- A. Tvarijonaviciute
- Departament de Medicina i Cirurgia Animals; Universitat Autònoma de Barcelona; 08193 Bellaterra Barcelona Spain
| | - J. D. García-Martínez
- Interdisciplinary Laboratory of Clinical Pathology, Iterlab-UMU, Campus of Excellence Mare Nostrum; University of Murcia; 30100 Espinardo Murcia Spain
| | - M. Caldin
- San Marco Veterinary Hospital; 35141 Padova Italy
| | - S. Martínez-Subiela
- Interdisciplinary Laboratory of Clinical Pathology, Iterlab-UMU, Campus of Excellence Mare Nostrum; University of Murcia; 30100 Espinardo Murcia Spain
| | - F. Tecles
- Interdisciplinary Laboratory of Clinical Pathology, Iterlab-UMU, Campus of Excellence Mare Nostrum; University of Murcia; 30100 Espinardo Murcia Spain
| | - J. Pastor
- Departament de Medicina i Cirurgia Animals; Universitat Autònoma de Barcelona; 08193 Bellaterra Barcelona Spain
| | - J. J. Ceron
- Interdisciplinary Laboratory of Clinical Pathology, Iterlab-UMU, Campus of Excellence Mare Nostrum; University of Murcia; 30100 Espinardo Murcia Spain
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Aguirre E, Renner O, de Miguel MR, Albarran M, Cebria A, Cebrian D, Ramos-Lima F, Pastor J, Blanco-Aparicio C. 198 Genetic and pharmacological inhibition of PIM-1 reduces tumor development in a K-Ras-driven mouse model of non-small cell lung cancer. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70324-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gutiérrez-Ginés MJ, Hernández AJ, Pérez-Leblic MI, Pastor J, Vangronsveld J. Phytoremediation of soils co-contaminated by organic compounds and heavy metals: bioassays with Lupinus luteus L. and associated endophytic bacteria. J Environ Manage 2014; 143:197-207. [PMID: 24912107 DOI: 10.1016/j.jenvman.2014.04.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 08/23/2013] [Revised: 03/10/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023]
Abstract
In the central part of the Iberian Peninsula there are old sealed landfills containing soils co-contaminated by several heavy metals (Cu, Zn, Pb, Cd, Ni, As, Cr, Fe, Al, Mn) and organic pollutants of different families (hydrocarbons, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides and other organochlorinated compounds, phenols and volatile compounds), which this work will address. We have focused on phytoremedial plants that are able to deal with this type of complex pollution, not only species that tolerate the joint effect of heavy metals in the soil, but also those that can take advantage of associated bacteria to efficiently break down organic compounds. This study was carried out with Lupinus luteus and its endophytes in two greenhouse experiments: A) growing in a substrate artificially contaminated with benzo(a)pyrene (BaP), and B) using real co-contaminated landfill soils. Endophytes of roots and shoots were isolated in both bioassays. Plant growth-promotion tests and organic pollutant tolerance and degradation tests were conducted on all strains isolated in bioassay A), and on those proving to be pure cultures from bioassay B). The selected landfill is described as are isolation and test procedures. Results indicate that plants did not show toxicity symptoms when exposed to BaP but did when grown in landfill soil. Some endophytes demonstrated plant growth-promotion capacity and tolerance to BaP and other organic compounds (diesel and PCB commercial mixtures). A few strains may even have the capacity to metabolize those organic pollutants. The overall decline in plant growth-promotion capacity in those strains isolated from the landfill soil experiment, compared with those from the bioassay with BaP, may indicate that lupin endophytes are not adapted to metal concentration in roots and shoots and fail to grow. As a result, most isolated root endophytes must have colonized root tissues from the soil. While preliminary degradation tests showed promising results (some strains exhibiting the potential to use organic pollutants as their sole source of carbon), these are not conclusive and further in-depth degradation assays need to be performed.
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Affiliation(s)
| | - A J Hernández
- Department of Life Sciences, Alcalá University, Alcalá de Henares, Spain
| | - M I Pérez-Leblic
- Department of Biomedical Sciences, Alcalá University, Alcalá de Henares, Spain
| | - J Pastor
- Department of Environmental Biology, Natural Sciences National Museum, CSIC, Madrid, Spain
| | - J Vangronsveld
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
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Monzote L, Pastor J, Scull R, Gille L. Antileishmanial activity of essential oil from Chenopodium ambrosioides and its main components against experimental cutaneous leishmaniasis in BALB/c mice. Phytomedicine 2014; 21:1048-1052. [PMID: 24768411 DOI: 10.1016/j.phymed.2014.03.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 01/23/2014] [Accepted: 03/02/2014] [Indexed: 06/03/2023]
Abstract
UNLABELLED Chenopodium ambrosioides have been used during centuries by native people to treat parasitic diseases. AIMS OF THE STUDY To compare the in vivo anti-leishmanial activity of the essential oil (EO) from C. ambrosioides and its major components (ascaridole, carvacrol and caryophyllene oxide). MATERIALS AND METHODS Anti-leishmanial effect was evaluated in BALB/c mice infected with Leishmania amazonensis and treated with the EO, main compounds and artificial mix of pure components by intralesional route at 30 mg/kg every 4 days during 14 days. Diseases progression and parasite burden in infected tissues were determined. RESULTS EO prevented lesion development compared (p<0.05) with untreated animals and treated with vehicle. In addition, the efficacy of EO was also statistically superior (p<0.05) compared with the glucantime-treated animals. No potential effects were observed with pure components treatment. Mix of pure compounds cause death of animals after 3 days of treatment. CONCLUSIONS Our results demonstrate the superiority of EO against experimental cutaneous leishmaniasis caused by L. amazonensis.
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Affiliation(s)
- L Monzote
- Parasitology Department, Institute of Tropical Medicine "Pedro Kouri", Havana, Cuba.
| | - J Pastor
- Parasitology Department, Institute of Tropical Medicine "Pedro Kouri", Havana, Cuba
| | - R Scull
- Department of Chemistry, Institute of Pharmacy and Food, Havana University, Cuba
| | - L Gille
- Biochemical Pharmacology and Toxicology Unit, Department of Biomedical Sciences, University of Veterinary Medicine, Vienna, Austria
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Pastor J, Adámek S, Polanecký O. [Primary small bowel volvulus in a young adult]. Rozhl Chir 2014; 93:322-324. [PMID: 25047972] [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: 06/03/2023]
Abstract
The authors present a rare case of a young male patient with primary small bowel volvulus. They show the main points to be considered in clinical diagnosis of this kind of acute abdomen and the importance of CT scan in such cases.
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Gomez-Iturriaga A, Cabeza M, Pastor J, Jove J, Casaña M, Mengual J, Muñoz J, Hervas A, Henriquez I, Carvajal C. Multi-institutional Outcomes Following External Beam Radiation Therapy and Androgen Deprivation Therapy in Patients With Extreme-Risk Prostate Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.964] [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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Medina-Rodríguez EM, Arenzana FJ, Pastor J, Redondo M, Palomo V, García de Sola R, Gil C, Martínez A, Bribián A, de Castro F. Inhibition of endogenous phosphodiesterase 7 promotes oligodendrocyte precursor differentiation and survival. Cell Mol Life Sci 2013; 70:3449-62. [PMID: 23661015 PMCID: PMC11113628 DOI: 10.1007/s00018-013-1340-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 04/05/2013] [Accepted: 04/08/2013] [Indexed: 12/21/2022]
Abstract
During the development of the central nervous system (CNS), oligodendrocyte precursors (OPCs) are generated in specific sites within the neural tube and then migrate to colonize the entire CNS, where they differentiate into myelin-forming oligodendrocytes. Demyelinating diseases such as multiple sclerosis (MS) are characterized by the death of these cells. The CNS reacts to demyelination and by promoting spontaneous remyelination, an effect mediated by endogenous OPCs, cells that represent approximately 5-7 % of the cells in the adult brain. Numerous factors influence oligodendrogliogenesis and oligodendrocyte differentiation, including morphogens, growth factors, chemotropic molecules, extracellular matrix proteins, and intracellular cAMP levels. Here, we show that during development and in early adulthood, OPCs in the murine cerebral cortex contain phosphodiesterase-7 (PDE7) that metabolizes cAMP. We investigated the effects of different PDE7 inhibitors (the well-known BRL-50481 and two new ones, TC3.6 and VP1.15) on OPC proliferation, survival, and differentiation. While none of the PDE7 inhibitors analyzed altered OPC proliferation, TC3.6 and VP1.15 enhanced OPC survival and differentiation, processes in which ERK intracellular signaling played a key role. PDE7 expression was also observed in OPCs isolated from adult human brains and the differentiation of these OPCs into more mature oligodendroglial phenotypes was accelerated by treatment with both new PDE7 inhibitors. These findings reveal new roles for PDE7 in regulating OPC survival and differentiation during brain development and in adulthood, and they may further our understanding of myelination and facilitate the development of therapeutic remyelination strategies for the treatment of MS.
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Affiliation(s)
- E. M. Medina-Rodríguez
- Grupo de Neurobiología del Desarrollo-GNDe, Hospital Nacional de Parapléjicos, Finca “La Peraleda”, s/n, 45071 Toledo, Spain
| | - F. J. Arenzana
- Grupo de Neurobiología del Desarrollo-GNDe, Hospital Nacional de Parapléjicos, Finca “La Peraleda”, s/n, 45071 Toledo, Spain
| | - J. Pastor
- Neurofisiología Clínica, Hospital Universitario La Princesa, Madrid, Spain
| | - M. Redondo
- Instituto de Química Médica, CSIC, Juan de la Cierva, Madrid, Spain
| | - V. Palomo
- Instituto de Química Médica, CSIC, Juan de la Cierva, Madrid, Spain
| | | | - C. Gil
- Instituto de Química Médica, CSIC, Juan de la Cierva, Madrid, Spain
| | - A. Martínez
- Instituto de Química Médica, CSIC, Juan de la Cierva, Madrid, Spain
| | - A. Bribián
- Grupo de Neurobiología del Desarrollo-GNDe, Hospital Nacional de Parapléjicos, Finca “La Peraleda”, s/n, 45071 Toledo, Spain
- Institute of Bioengineering of Catalonia, Parc Cientific de Barcelona & Cell Biology Department, Universidad de Barcelona, Barcelona, Spain
| | - F. de Castro
- Grupo de Neurobiología del Desarrollo-GNDe, Hospital Nacional de Parapléjicos, Finca “La Peraleda”, s/n, 45071 Toledo, Spain
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Pastor J, Adámek S. [Obscure gastrointestinal bleeding]. Rozhl Chir 2013; 92:424-428. [PMID: 24274343] [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: 06/02/2023]
Abstract
Obscure gastrointestinal bleeding represents 5% of all cases of bleeding into the gastrointestinal tract (GIT). The cause of this type of bleeding cannot be found by gastroscopy or colonoscopy - the most common cause being bleeding from the source in the small intestine. In other cases it is bleeding from other parts of the digestive tube which has already stopped or was not noticed during admission endoscopy. Imaging methods (X-ray, CT, MRI, scintigraphy) and endoscopic methods (flexible or capsule enteroscopy) are used in the diagnosis and treatment. If, despite having used these methods, the source of bleeding is not found and the bleeding continues, or if the source is known but the bleeding cannot be stopped by radiologic or endoscopic intervention, surgical intervention is usually indicated. The article provides an overview of current diagnostic and treatment options, including instructions on how to proceed in these diagnostically difficult situations.
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Hervás A, Pastor J, González C, Jove J, Sancho S, Gómez A, Casaña M, Villafranca E, Mengual J, Muñoz V, Henríquez I, Collado E, Clemente J. Recap: Outcomes in patients with intermediate risk prostate cancer. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.820] [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: 11/28/2022] Open
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Blackwood L, Murphy S, Pastor J. Response to letter by Dr Schulman regarding ‘European consensus document on mast cell tumours in dogs and cats’. Vet Comp Oncol 2013; 11:164-5. [DOI: 10.1111/vco.12030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Pastor J, Sola RG, Ortega GJ. [Contamination of paroxysmal activity in quantitative EEG methods in epileptic patients]. Rev Neurol 2012; 55:713-717. [PMID: 23233138] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
INTRODUCTION. The presence of an acute spike-wave pattern in the recordings of epileptic patients can contaminate the calculated synchronisation values between pairs of electrodes. MATERIALS AND METHODS. We present a simple procedure, involving a numeric simulation of a bivariate electroencephalogram recording with paroxysmal activity, to determine whether or not a method for quantifying synchronisation must be used on any of the recordings that are typically employed in the preoperative evaluation of patients with epilepsy. RESULTS. The information provided by this procedure makes it possible to distinguish between the authentic synchronisation of baseline activity and that produced by paroxysmal activity, such as acute spike-wave patterns. The procedure developed in this study makes it possible to quantify the degree of 'contamination' produced by the synchronisation of the paroxysmal activity on the synchronisation values of the baseline activity. CONCLUSIONS. The issue addressed in this work is of fundamental importance when automatic methods are utilised in the clinical applications of quantitative electroencephalography and can help to prevent diagnostic errors in which synchronisation is used as a marker of the pathology.
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Affiliation(s)
- J Pastor
- Hospital Universitario de la Princesa, Madrid, Espana
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Scannella S, Pariente J, Lotterie J, De Boissezon X, Marque P, Simonetta-Moreau M, Castel-Lacanal E, Pastor J. Hemineglect evaluation using a spatial visuo-auditory task. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.502] [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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Gutiérrez-Ginés MJ, Pastor J, Hernández AJ. Integrated approach to assessing the effects of soils polluted with heavy metals on a plant population. Ecotoxicology 2012; 21:1965-78. [PMID: 22623112 DOI: 10.1007/s10646-012-0931-2] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Accepted: 05/10/2012] [Indexed: 05/04/2023]
Abstract
This study addresses the effects of soil polluted with more than one heavy metal in a grass species. A 16-week bioassay with Avena sativa L. was conducted in microcosms using soils from two abandoned mines in central Spain that contained levels above World Health Organization (WHO) reference limits for soils of more than three heavy metals. Pollution effects were examined at cell, tissue, organ, plant and population levels. For this purpose, dry weight, maximum height and number of leaves were determined; leaf tissues were observed by low temperature scanning electron microscopy; the metal contents of roots and shoots were determined by plasma emission spectroscopy and their distribution in different tissues was analyzed by X-ray microanalysis using an environmental scanning electron microscope. The results explain the accumulation and translocation of soil metals by this plant species; their effects in cells, tissues and growth of plants; and allow inference on population effects. The discussion of the methodological approach leads us to propose a valid protocol to assess the effects of a set of heavy metals present in the topsoil of polluted sites on a plant population. We recommend its use for an ecotoxicological diagnosis and risk analysis of similarly polluted sites.
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Affiliation(s)
- M J Gutiérrez-Ginés
- Departamento de Ecología, Edificio de Ciencias, Universidad de Alcalá, Ctra. Madrid-Barcelona km 33.6, 28871, Alcalá de Henares, Madrid, Spain.
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Scannella S, Pariente J, Lotterie J, De Boissezon X, Marque P, Simonetta-Moreau M, Castel-Lacanal E, Pastor J. Le paradigme du conflit visuo-auditif spatial comme outil de diagnostic de l’héminégligence. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.494] [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: 11/28/2022]
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de la Fuente C, Monreal L, Cerón J, Pastor J, Viu J, Añor S. Fibrinolytic activity in cerebrospinal fluid of dogs with different neurological disorders. J Vet Intern Med 2012; 26:1365-73. [PMID: 22925115 DOI: 10.1111/j.1939-1676.2012.00991.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 06/29/2012] [Accepted: 07/18/2012] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Fibrinolytic activity in cerebrospinal fluid (CSF) is activated in humans by different pathologic processes. OBJECTIVES To investigate fibrinolytic activity in the CSF of dogs with neurological disorders by measuring CSF D-dimer concentrations. ANIMALS One hundred and sixty-nine dogs with neurological disorders, 7 dogs with systemic inflammatory diseases without central nervous system involvement (SID), and 7 healthy Beagles were included in the study. Dogs with neurological disorders included 11 with steroid-responsive meningitis-arteritis (SRMA), 37 with other inflammatory neurological diseases (INF), 38 with neoplasia affecting the central nervous system (NEO), 28 with spinal compressive disorders (SCC), 15 with idiopathic epilepsy (IE), and 40 with noninflammatory neurological disorders (NON-INF). METHODS Prospective observational study. D-dimers and C-reactive protein (CRP) were simultaneously measured in paired CSF and blood samples. RESULTS D-dimers and CRP were detected in 79/183 (43%) and in 182/183 (99.5%) CSF samples, respectively. All dogs with IE, SID, and controls had undetectable concentrations of D-dimers in the CSF. CSF D-dimer concentrations were significantly (P < .001) higher in dogs with SRMA than in dogs with other diseases and controls. CSF CRP concentration in dogs with SRMA was significantly (P < .001) higher than in dogs of other groups and controls, except for the SID group. No correlation was found between blood and CSF D-dimer concentrations. CONCLUSIONS AND CLINICAL IMPORTANCE Intrathecal fibrinolytic activity seems to be activated in some canine neurological disorders, and it is high in severe meningeal inflammatory diseases. CSF D-dimer concentrations may be considered a diagnostic marker for SRMA.
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Affiliation(s)
- C de la Fuente
- Departament de Medicina i Cirurgia Animal, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
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Blackwood L, Murphy S, Buracco P, De Vos JP, De Fornel-Thibaud P, Hirschberger J, Kessler M, Pastor J, Ponce F, Savary-Bataille K, Argyle DJ. European consensus document on mast cell tumours in dogs and cats. Vet Comp Oncol 2012; 10:e1-e29. [DOI: 10.1111/j.1476-5829.2012.00341.x] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- L. Blackwood
- Small Animal Teaching Hospital, The Leahurst Campus; University of Liverpool Chester High Road; Neston Wirral CH64 7TE UK
| | - S. Murphy
- The Animal Health Trust; Suffolk CB8 7UU UK
| | - P. Buracco
- Department of Animal Pathology, School of Veterinary Medicine; University of Turin; Grugliasco (TO) Italy
| | - J. P. De Vos
- “De Ottenhorst” Veterinary Oncology Referral Centre; Terneuzen The Netherlands
| | - P. De Fornel-Thibaud
- DESV Internal Medicine, Centre de Cancérologie Vétérinaire; Maisons-Alfort France
| | - J. Hirschberger
- Medizinische Kleintierklinik Clinic for Small Animal Medicine, Center for Clinical Veterinary Medicine; Ludwig-Maximilians-Universität München Veterinärstr; München Germany
| | | | - J. Pastor
- Patología Médica Facultad de Veterinaria; Universidad Autónoma de Barcelona; Bellaterra Spain
| | - F. Ponce
- VetAgro Sup; Université Lyon 1; Lyon France
| | | | - D. J. Argyle
- Royal (Dick) School of Veterinary Studies and Roslin Institute; Easter Bush Midlothian EH25 9RG UK
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Larumbe S, Gómez-Polo C, Pérez-Landazábal JI, Pastor JM. Effect of a SiO2 coating on the magnetic properties of Fe3O4 nanoparticles. J Phys Condens Matter 2012; 24:266007. [PMID: 22700683 DOI: 10.1088/0953-8984/24/26/266007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this work the effect of a SiO2 coating on the magnetic properties of Fe3O4 nanoparticles obtained by the sol-gel method is analyzed. Two sets of samples were prepared: Fe3O4 nanoparticles and Fe3O4@SiO2 core-shell composites. The samples display the characteristic spinel structure associated with the magnetite Fe3O4 phase, with the majority of grain sizes around 5-10 nm. At room temperature the nanoparticles show the characteristic superparamagnetic behavior with mean blocking temperatures around 160 and 120 K for Fe3O4 and Fe3O4@SiO2, respectively. The main effect of the SiO2 coating is reflected in the temperature dependence of the high field magnetization (μ(0)H = 6 T), i.e. deviations from the Bloch law at low temperatures (T < 20 K). Such deviations, enhanced by the introduction of the SiO2 coating, are associated with the occurrence of surface spin disordered effects. The induction heating effects (magnetic hyperthermia) are analyzed under the application of an AC magnetic field. Maximum specific absorption rate (SAR) values around 1.5 W g(-1) were achieved for the Fe3O4 nanoparticles. A significant decrease (around 26%) is found in the SAR values of the SiO2 coated nanocomposite. The different heating response is analyzed in terms of the decrease of the effective nanoparticle magnetization in the Fe3O4@SiO2 core-shell composites at room temperature.
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Affiliation(s)
- S Larumbe
- Departamento de Fisica, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
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