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Cagliostro M, Folch A, Ali S, Lala-Trindade A, Moss N, Parikh A, Contreras J, Mitter S, Trivieri M, Gidea C, Mancini D, Barghash M. Added Value of Molecular Microscope Diagnostic System (mmdx) to Established Indicators of Heart Transplant Rejection: A Single Center Experience. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1222] [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: 04/05/2023] Open
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2
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Folch A, Gasol L, Heredia L, Vicens P, Torrente M. Mindful schools: Neuropsychological performance after the implementation of a mindfulness-based structured program in the school setting. Curr Psychol 2021. [DOI: 10.1007/s12144-021-02572-z] [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: 10/19/2022]
Abstract
AbstractMindfulness has attracted considerable attention in educational settings as it can have positive effects on children. However, the role of mindfulness practice in schools has yet to be understood. The aim of the present study is to assess the impact of mindfulness on neuropsychological performance and psychological well-being of primary school children. It also aims to explore the teacher’s mindfulness training effect on the intervention. The present study recruited 100 children (64% girls and 36% boys) aged 9–11 from a primary school in Tarragona (Spain). The research was conducted between 2016–2018 with three experimental groups: a mindfulness intervention group with a trained mindfulness teacher, a mindfulness intervention group with a non-trained mindfulness teacher, and a control group. All groups were evaluated before and after a 13-weeks intervention, consisting of 5–10 min mindfulness daily sessions before class. After the intervention, the two groups of children receiving mindfulness sessions performed better than controls in several neuropsychological tasks involving executive functions, such as short-term and working memory, learning, mental flexibility, visuospatial abilities and processing speed. No significant differences were found in the assessment of daily stress or emotional and behavioural problems. The findings of the present study can contribute to a better understanding of the role of mindfulness practice in primary children regarding neuropsychological performance, highlighting the importance of the teacher’s mindfulness training in the teaching/learning process.
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Folch A, Gallo D, Miró J, Salvador-Carulla L, Martínez-Leal R. Mirror therapy for phantom limb pain in moderate intellectual disability. A case report. Eur J Pain 2021; 26:246-254. [PMID: 34464481 DOI: 10.1002/ejp.1859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 08/30/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Phantom limb pain (PLP) is a common problem after limb amputation. There is mounting evidence supporting the use of mirror therapy (MT) in the treatment of individuals with PLP. However, there is no research studying the effects of MT on PLP in individuals with intellectual developmental disorders (IDD). The aim of this study was to increase our understanding of MT when used with adults with IDD and PLP through a case study approach. METHODS Here, we describe the use of MT with a 53-year-old female with moderate IDD and PLP, related to her left leg being amputated after ulcer complications. The study followed an A-B-A-B design (baseline-treatment-withdrawal of treatment-re-introduction of treatment), lasting 2 years, which included a long-term follow-up. RESULTS The data showed that the PLP sensation decreased after the MT treatment, with a raw change of 3.92 points and a 48% decrease in mean pain intensity ratings from pre- to post-treatment. CONCLUSIONS This is a unique case-report on the use of MT with an individual with IDD suffering from PLP. The findings show that MT helped to significantly reduce the intensity of the PLP in this patient. SIGNIFICANCE This is a case-report that illustrates how mirror therapy can be applied to people with intellectual developmental disorders and phantom limb pain. The results showed that phantom limb pain decreased after the mirror therapy, with a raw change of 3,92 points and a percent change of 48%.
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Affiliation(s)
- Annabel Folch
- UNIVIDD, Intellectual Disability and Developmental Disorders Research Unit, Fundació Villablanca, IISPV, Institut d'Investigació Sanitària Pere Virgili, CIBERSAM, Centro de Investigación Biomédica en Red, Departament de Psicologia, Universitat Rovira i Virgili, Reus, Spain
| | - Daniel Gallo
- UNIVIDD, Intellectual Disability and Developmental Disorders Research Unit, Fundació Villablanca, IISPV, Institut d'Investigació Sanitària Pere Virgili, CIBERSAM, Centro de Investigación Biomédica en Red, Departament de Psicologia, Universitat Rovira i Virgili, Reus, Spain
| | - Jordi Miró
- Unit for the Study and Treatment of Pain-ALGOS, Department of Psychology, Research Center for Behavior Assessment (CRAMC), Universitat Rovira i Virgili, Institut d'Investigació Sanitària Pere Virgili, Tarragona, Spain
| | - Luis Salvador-Carulla
- Centre for Mental Health Research, Research School of Population Health, ANU College of Health and Medicine, Australian National University, Canberra, Australia.,Menzies Centre for Health Policy, Sydney School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Rafael Martínez-Leal
- UNIVIDD, Intellectual Disability and Developmental Disorders Research Unit, Fundació Villablanca, IISPV, Institut d'Investigació Sanitària Pere Virgili, CIBERSAM, Centro de Investigación Biomédica en Red, Departament de Psicologia, Universitat Rovira i Virgili, Reus, Spain
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Horowitz LF, Rodriguez AD, Dereli-Korkut Z, Lin R, Castro K, Mikheev AM, Monnat RJ, Folch A, Rostomily RC. Multiplexed drug testing of tumor slices using a microfluidic platform. NPJ Precis Oncol 2020; 4:12. [PMID: 32435696 PMCID: PMC7237421 DOI: 10.1038/s41698-020-0117-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 03/25/2020] [Indexed: 12/11/2022] Open
Abstract
Current methods to assess the drug response of individual human cancers are often inaccurate, costly, or slow. Functional approaches that rapidly and directly assess the response of patient cancer tissue to drugs or small molecules offer a promising way to improve drug testing, and have the potential to identify the best therapy for individual patients. We developed a digitally manufactured microfluidic platform for multiplexed drug testing of intact cancer slice cultures, and demonstrate the use of this platform to evaluate drug responses in slice cultures from human glioma xenografts and patient tumor biopsies. This approach retains much of the tissue microenvironment and can provide results rapidly enough, within days of surgery, to guide the choice of effective initial therapies. Our results establish a useful preclinical platform for cancer drug testing and development with the potential to improve cancer personalized medicine.
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Affiliation(s)
- L. F. Horowitz
- Department of Bioengineering, University of Washington, Seattle, WA 98195 USA
- Department of Neurosurgery, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98195 USA
- Department of Pathology, University of Washington, Seattle, WA 98195 USA
| | - A. D. Rodriguez
- Department of Bioengineering, University of Washington, Seattle, WA 98195 USA
| | - Z. Dereli-Korkut
- Department of Neurosurgery, Houston Methodist Hospital and Research Institute, Houston, TX USA
| | - R. Lin
- Department of Bioengineering, University of Washington, Seattle, WA 98195 USA
| | - K. Castro
- Department of Bioengineering, University of Washington, Seattle, WA 98195 USA
| | - A. M. Mikheev
- Department of Neurosurgery, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98195 USA
- Department of Neurosurgery, Houston Methodist Hospital and Research Institute, Houston, TX USA
| | - R. J. Monnat
- Department of Pathology, University of Washington, Seattle, WA 98195 USA
- Department of Genome Sciences, University of Washington, Seattle, WA 98195 USA
| | - A. Folch
- Department of Bioengineering, University of Washington, Seattle, WA 98195 USA
| | - R. C. Rostomily
- Department of Neurosurgery, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98195 USA
- Department of Neurosurgery, Houston Methodist Hospital and Research Institute, Houston, TX USA
- Weill Cornell School of Medicine, Department of Neurosurgery, New York, NY USA
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5
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Rodriguez A, Horowitz L, Castro K, Kenerson H, Bhattacharjee N, Gandhe G, Raman A, Monnat RJ, Yeung R, Rostomily R, Folch A. A microfluidic platform for functional testing of cancer drugs on intact tumor slices. Lab Chip 2020; 20:1658-1675. [PMID: 32270149 PMCID: PMC7679198 DOI: 10.1039/c9lc00811j] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Present approaches to assess cancer treatments are often inaccurate, costly, and/or cumbersome. Functional testing platforms that use live tumor cells are a promising tool both for drug development and for identifying the optimal therapy for a given patient, i.e. precision oncology. However, current methods that utilize patient-derived cells from dissociated tissue typically lack the microenvironment of the tumor tissue and/or cannot inform on a timescale rapid enough to guide decisions for patient-specific therapy. We have developed a microfluidic platform that allows for multiplexed drug testing of intact tumor slices cultured on a porous membrane. The device is digitally-manufactured in a biocompatible thermoplastic by laser-cutting and solvent bonding. Here we describe the fabrication process in detail, we characterize the fluidic performance of the device, and demonstrate on-device drug-response testing with tumor slices from xenografts and from a patient colorectal tumor.
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Affiliation(s)
- A.D Rodriguez
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
- corresponding author:
| | - L.F Horowitz
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
- Department of Pathology, University of Washington, Seattle, WA 98195, USA
| | - K. Castro
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - H. Kenerson
- Department of Surgery, University of Washington Seattle, WA 98105, USA
| | - N. Bhattacharjee
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - G. Gandhe
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - A. Raman
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - R. J. Monnat
- Department of Pathology, University of Washington, Seattle, WA 98195, USA
| | - R. Yeung
- Department of Surgery, University of Washington Seattle, WA 98105, USA
| | - R.C. Rostomily
- Department of Neurosurgery, Houston Methodist Hospital and Research Institute, Houston, TX, USA
- Weill Cornell School of Medicine, Department of Neurosurgery
| | - A. Folch
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
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Prata AT, Folch A, Prata AJ, Biondi R, Brenot H, Cimarelli C, Corradini S, Lapierre J, Costa A. Author Correction: Anak Krakatau triggers volcanic freezer in the upper troposphere. Sci Rep 2020; 10:7279. [PMID: 32332874 PMCID: PMC7181661 DOI: 10.1038/s41598-020-64152-8] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A T Prata
- Barcelona Supercomputing Center, Computer Applications in Science and Engineering, Barcelona, Spain.
| | - A Folch
- Barcelona Supercomputing Center, Computer Applications in Science and Engineering, Barcelona, Spain
| | - A J Prata
- AIRES Pty. Ltd., Mt Eliza, Victoria, Australia.,Visiting Professor, School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Perth, Australia
| | - R Biondi
- Università degli Studi di Padova, Dipartimento di Geoscienze, Padua, Italy
| | - H Brenot
- Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
| | - C Cimarelli
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, München, Germany
| | - S Corradini
- Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Rome, Italy
| | - J Lapierre
- Earth Networks Inc., Germantown, MD, United States
| | - A Costa
- Istituto Nazionale di Geofisica e Vulcanologia Sezione di Bologna, Bologna, Italy
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Folch A, Cortés MJ, Salvador-Carulla L, Vicens P, Irazábal M, Muñoz S, Rovira L, Orejuela C, Haro JM, Vilella E, Martínez-Leal R. Risk factors and topographies for self-injurious behaviour in a sample of adults with intellectual developmental disorders. J Intellect Disabil Res 2018; 62:1018-1029. [PMID: 29607562 DOI: 10.1111/jir.12487] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 11/14/2017] [Accepted: 03/04/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Self-injurious behaviour (SIB) is a prevalent form of challenging behaviour in people with intellectual developmental disorders (IDD). Existing research has yielded conflicting findings concerning the major risk factors involved, and in addition, SIB shows multiple topographies and presentations. Although presence of autism spectrum disorders (ASD) and severity of intellectual disability (ID) are known risk factors for SIB, there are no studies comparing SIB topographies by severity degrees of ID and ASD. The purpose of the present paper has been to identify risk factors and topographies for SIB in a representative, stratified and randomised sample of adults with IDD. METHOD This study was conducted on the basis of data collected by the POMONA-ESP project, in a sample of 833 adults with IDD. Data concerning demographic and health information, ASD symptoms, psychopathology and ID, have been analysed to determine the presence of risk factors for SIB among participants and to explore the occurrence and topographies of SIB across different severity levels of ID and ASD symptoms. RESULTS Self-injurious behaviour prevalence in the sample was 16.2%. Younger age, oral pain, greater severity of ID, presence of dual diagnosis, psychiatric medication intake and higher scores on Childhood Autism Rating Scale were risk factors for SIB among participants, whereas number of areas with functioning limitations, place of residence, diagnosis of epilepsy and sex were not. SIB was more frequent in participants with ASD symptoms regardless of its severity level, and they displayed a higher number of different topographies of SIB. People with profound ID without co-morbid ASD symptoms showed similar results concerning SIB prevalence and topographies. CONCLUSIONS Knowledge on risk factors and topographies of SIB might play a vital role in the development of prevention strategies and management of SIB in people with IDD. The mere presence of ASD symptoms, regardless of its severity level, can be a crucial factor to be taken into account in assessing SIB. Accordingly, the presence of SIB in people with ID, especially when presented with a varied number of topographies, might provide guidance on ASD differential diagnosis.
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Affiliation(s)
- A Folch
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD), Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
- Department of Psychology, Universitat Rovira i Virgili, Tarragona, Spain
| | - M J Cortés
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD), Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
- Centre of Biomedical Research Network on Mental Health (CIBERSAM), Spain
| | - L Salvador-Carulla
- Centre for Mental Health Research, Research School of Population Health, ANU College of Health and Medicine, Australian National University, Canberra, Australian Capital Territory, Australia
| | - P Vicens
- Department of Psychology, Universitat Rovira i Virgili, Tarragona, Spain
- Research Center in Behavioral Assessment (CRAMC), Universitat Rovira i Virgili, Tarragona, Spain
- Laboratory of Toxicology and Environmental Health, Universitat Rovira i Virgili, Tarragona, Spain
| | - M Irazábal
- Parc Sanitari Sant Joan de Déu, Spain
- Faculty of Education, Universitat de Barcelona, Barcelona, Spain
| | - S Muñoz
- Plena Inclusión España, Madrid, Spain
| | - L Rovira
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD), Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - C Orejuela
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD), Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - J M Haro
- Centre of Biomedical Research Network on Mental Health (CIBERSAM), Spain
- Parc Sanitari Sant Joan de Déu, Spain
- Department of Psychiatry and Clinical Psychobiology, Universitat de Barcelona, Barcelona, Spain
| | - E Vilella
- Centre of Biomedical Research Network on Mental Health (CIBERSAM), Spain
- Institut Pere Mata, University Psychiatric Hospital, Reus, Spain
| | - R Martínez-Leal
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD), Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
- Centre of Biomedical Research Network on Mental Health (CIBERSAM), Spain
- Department of Psychology, Universitat Rovira i Virgili, Tarragona, Spain
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8
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Folch A, Martínez-Leal R, Vicens P, Irazábal M, Muñoz S, Salvador-Carulla L, Rovira L, Orejuela C, Cortés MJ. The POMONA-ESP project methodology: Collecting data on health indicators for people with intellectual developmental disorders. J Appl Res Intellect Disabil 2018; 32:15-22. [PMID: 30009410 DOI: 10.1111/jar.12497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND People with intellectual developmental disorders have significant health disparities and a lack of proper attention to their health needs. They have been underrepresented in scientific research, and very few studies have been carried out using a representative randomized sample. The aim of this study was to describe the methods used in the POMONA-ESP project to recruit a representative and randomized sample of participants with intellectual developmental disorders. METHODS The POMONA-ESP project is an observational cross-sectional study. It aims to explore the health status of people with intellectual developmental disorders across Spain and the use they make of health services. RESULTS AND CONCLUSIONS The results of the POMONA-ESP project may have a major impact on people with intellectual developmental disorders and society in general. It is the first study to obtain geographically representative epidemiological data from a large sample, information that is fundamental to improving care and healthcare planning for people with intellectual developmental disorders.
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Affiliation(s)
- Annabel Folch
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) - Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain.,Department of Psychology, Universitat Rovira i Virgili, Tarragona, Spain
| | - Rafael Martínez-Leal
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) - Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain.,Department of Psychology, Universitat Rovira i Virgili, Tarragona, Spain.,Centre of Biomedical Research Network on Mental Health (CIBERSAM), Madrid, Spain
| | - Paloma Vicens
- Department of Psychology, Universitat Rovira i Virgili, Tarragona, Spain.,Research Center in Behavioral Assessment (CRAMC), Universitat Rovira i Virgili, Tarragona, Spain.,Laboratory of Toxicology and Environmental Health, Universitat Rovira i Virgili, Tarragona, Spain
| | - Marcia Irazábal
- Parc Sanitari Sant Joan de Déu, Sant Boi de Llobregat, Spain.,Faculty of Education, Universitat de Barcelona, Barcelona, Spain
| | | | - Luis Salvador-Carulla
- Centre for Mental Health Research, Research School of Population Health, ANU College of Health and Medicine, Australian National University, Canberra, ACT, Australia
| | - Lluís Rovira
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) - Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - Carmen Orejuela
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) - Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - Maria José Cortés
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) - Fundació Villablanca, IISPV, Universitat Rovira i Virgili, Reus, Spain.,Centre of Biomedical Research Network on Mental Health (CIBERSAM), Madrid, Spain
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Folch A, Salvador‐Carulla L, Vicens P, Cortés MJ, Irazábal M, Muñoz S, Rovira L, Orejuela C, González JA, Martínez‐Leal R. Health indicators in intellectual developmental disorders: The key findings of the
POMONA
‐
ESP
project. J Appl Res Intellect Disabil 2018; 32:23-34. [DOI: 10.1111/jar.12498] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Annabel Folch
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) ‐ Fundació Villablanca IISPV Universitat Rovira i Virgili Reus Spain
- Department of Psychology Universitat Rovira i Virgili Tarragona Spain
| | - Luis Salvador‐Carulla
- Centre for Mental Health Research Research School of Population Health ANU College of Health and Medicine Australian National University Canberra ACT Australia
| | - Paloma Vicens
- Department of Psychology Universitat Rovira i Virgili Tarragona Spain
- Research Center in Behavioral Assessment (CRAMC) Universitat Rovira i Virgili Tarragona Spain
- Laboratory of Toxicology and Environmental Health Universitat Rovira i Virgili Tarragona Spain
| | - Maria José Cortés
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) ‐ Fundació Villablanca IISPV Universitat Rovira i Virgili Reus Spain
- Centre of Biomedical Research Network on Mental Health (CIBERSAM) Madrid Spain
| | - Marcia Irazábal
- Parc Sanitari Sant Joan de Déu Sant Boi de Llobregat Spain
- Faculty of Education Universitat de Barcelona Barcelona Spain
| | | | - Lluís Rovira
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) ‐ Fundació Villablanca IISPV Universitat Rovira i Virgili Reus Spain
| | - Carmen Orejuela
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) ‐ Fundació Villablanca IISPV Universitat Rovira i Virgili Reus Spain
| | - Juan A. González
- Asociación en Favor de las Personas con Discapacidad Intelectual de Córdoba‐ APROSUB Córdoba Spain
| | - Rafael Martínez‐Leal
- Intellectual Disability and Developmental Disorders Research Unit (UNIVIDD) ‐ Fundació Villablanca IISPV Universitat Rovira i Virgili Reus Spain
- Department of Psychology Universitat Rovira i Virgili Tarragona Spain
- Centre of Biomedical Research Network on Mental Health (CIBERSAM) Madrid Spain
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Geyer A, Marti A, Giralt S, Folch A. Potential ash impact from Antarctic volcanoes: Insights from Deception Island's most recent eruption. Sci Rep 2017; 7:16534. [PMID: 29184137 PMCID: PMC5705727 DOI: 10.1038/s41598-017-16630-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 06/01/2017] [Accepted: 11/15/2017] [Indexed: 11/10/2022] Open
Abstract
Ash emitted during explosive volcanic eruptions may disperse over vast areas of the globe posing a threat to human health and infrastructures and causing significant disruption to air traffic. In Antarctica, at least five volcanoes have reported historic activity. However, no attention has been paid to the potential socio-economic and environmental consequences of an ash-forming eruption occurring at high southern latitudes. This work shows how ash from Antarctic volcanoes may pose a higher threat than previously believed. As a case study, we evaluate the potential impacts of ash for a given eruption scenario from Deception Island, one of the most active volcanoes in Antarctica. Numerical simulations using the novel MMB-MONARCH-ASH model demonstrate that volcanic ash emitted from Antarctic volcanoes could potentially encircle the globe, leading to significant consequences for global aviation safety. Results obtained recall the need for performing proper hazard assessment on Antarctic volcanoes, and are crucial for understanding the patterns of ash distribution at high southern latitudes with strong implications for tephrostratigraphy, which is pivotal to synchronize palaeoclimatic records.
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Affiliation(s)
- A Geyer
- Institute of Earth Sciences Jaume Almera (ICTJA-CSIC), Lluis Solé i Sabaris s/n, 08028, Barcelona, Spain.
| | - A Marti
- Barcelona Supercomputing Center (BSC), Jordi Girona 29, 08034, Barcelona, Spain.
| | - S Giralt
- Institute of Earth Sciences Jaume Almera (ICTJA-CSIC), Lluis Solé i Sabaris s/n, 08028, Barcelona, Spain
| | - A Folch
- Barcelona Supercomputing Center (BSC), Jordi Girona 29, 08034, Barcelona, Spain
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Bhattacharjee N, Horowitz LF, Folch A. Continuous-flow multi-pulse electroporation at low DC voltages by microfluidic flipping of the voltage space topology. Appl Phys Lett 2016; 109:163702. [PMID: 27821874 PMCID: PMC5075000 DOI: 10.1063/1.4963316] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 09/12/2016] [Indexed: 05/13/2023]
Abstract
Concerns over biosafety, cost, and carrying capacity of viral vectors have accelerated research into physical techniques for gene delivery such as electroporation and mechanoporation. Advances in microfabrication have made it possible to create high electric fields over microscales, resulting in more efficient DNA delivery and higher cell viability. Continuous-flow microfluidic methods are typically more suitable for cellular therapies where a large number of cells need to be transfected under sterile conditions. However, the existing continuous-flow designs used to generate multiple pulses either require expensive peripherals such as high-voltage (>400 V) sources or function generators, or result in reduced cell viability due to the proximity of the cells to the electrodes. In this paper, we report a continuous-flow microfluidic device whose channel geometry reduces instrumentation demands and minimizes cellular toxicity. Our design can generate multiple pulses of high DC electric field strength using significantly lower voltages (15-60 V) than previous designs. The cells flow along a serpentine channel that repeatedly flips the cells between a cathode and an anode at high throughput. The cells must flow through a constriction each time they pass from an anode to a cathode, exposing them to high electric field strength for short durations of time (the "pulse-width"). A conductive biocompatible poly-aniline hydrogel network formed in situ is used to apply the DC voltage without bringing the metal electrodes close to the cells, further sheltering cells from the already low voltage electrodes. The device was used to electroporate multiple cell lines using electric field strengths between 700 and 800 V/cm with transfection efficiencies superior than previous flow-through designs.
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Affiliation(s)
- N Bhattacharjee
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, USA
| | - L F Horowitz
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, USA
| | - A Folch
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, USA
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12
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Sip CG, Folch A. Stable chemical bonding of porous membranes and poly(dimethylsiloxane) devices for long-term cell culture. Biomicrofluidics 2014; 8:036504. [PMID: 25379080 PMCID: PMC4162454 DOI: 10.1063/1.4883075] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 06/02/2014] [Indexed: 05/04/2023]
Abstract
We have investigated the bonding stability of various silane treatments for the integration of track-etched membranes with poly(dimethylsiloxane) (PDMS) microfluidic devices. We compare various treatments using trialkoxysilanes or dipodal silanes to determine the effect of the organofunctional group, cross-link density, reaction solvent, and catalyst on the bond stability. We find that devices made using existing silane methods delaminated after one day when immersed in cell culture medium at 37 °C. In contrast, the dipodal silane, bis[3-(trimethoxysilyl)propyl]amine, is shown to yield stable and functional integration of membranes with PDMS that is suitable for long-term cell culture. To demonstrate application of the technique, we fabricated an open-surface device in which cells cultured on a track-etched membrane can be stimulated at their basal side via embedded microfluidic channels. C2C12 mouse myoblasts were differentiated into myotubes over the course of two weeks on these devices to demonstrate biocompatibility. Finally, devices were imaged during the basal-side delivery of a fluorescent stain to validate the membrane operation and long-term stability of the bonding technique.
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Affiliation(s)
- Christopher G Sip
- Department of Bioengineering, University of Washington , Seattle, Washington 98185, USA
| | - A Folch
- Department of Bioengineering, University of Washington , Seattle, Washington 98185, USA
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Scollo S, Folch A, Coltelli M, Realmuto VJ. Three-dimensional volcanic aerosol dispersal: A comparison between Multiangle Imaging Spectroradiometer (MISR) data and numerical simulations. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd013162] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S. Scollo
- Istituto Nazionale di Geofisica e Vulcanologia-Sezione Catania; Catania Italy
| | - A. Folch
- Barcelona Supercomputing Center; Barcelona Spain
| | - M. Coltelli
- Istituto Nazionale di Geofisica e Vulcanologia-Sezione Catania; Catania Italy
| | - V. J. Realmuto
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
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Folch A, Costa A, Durant A, Macedonio G. A model for wet aggregation of ash particles in volcanic plumes and clouds: 2. Model application. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jb007176] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
Tissue function is modulated by an intricate architecture of cells and biomolecules on a micrometer scale. Until now, in vitro cellular interactions were mainly studied by random seeding over homogeneous substrates. Although this strategy has led to important discoveries, it is clearly a nonoptimal analog of the in vivo scenario. With the incorporation--and adaptation--of microfabrication technology into biology, it is now possible to design surfaces that reproduce some of the aspects of that architecture. This article reviews past research on the engineering of cell-substrate, cell-cell, and cell-medium interactions on the micrometer scale.
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Affiliation(s)
- A Folch
- Bioengineering Department, University of Washington, Seattle, Washington 98195, USA.
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Abstract
Here we present an inexpensive method to fabricate microscopic cellular cultures, which does not require any surface modification of the substrate prior to cell seeding. The method utilizes a reusable elastomeric stencil (i.e., a membrane containing thru holes) which seals spontaneously against the surface. The stencil is applied to the cell-culture substrate before seeding. During seeding, the stencil prevents the substrate from being exposed to the cell suspension except on the hole areas. After cells are allowed to attach and the stencil is peeled off, cellular islands with a shape similar to the holes remain on the cell-culture substrate. This solvent-free method can be combined with a wide range of substrates (including biocompatible polymers, homogeneous or nonplanar surfaces, microelectronic chips, and gels), biomolecules, and virtually any adherent cell type.
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Affiliation(s)
- A Folch
- Center for Engineering in Medicine, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St., Bigelow 1401, Boston, MA 02114, USA
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Ledezma GA, Folch A, Bhatia SN, Balis UJ, Yarmush ML, Toner M. Numerical model of fluid flow and oxygen transport in a radial-flow microchannel containing hepatocytes. J Biomech Eng 1999; 121:58-64. [PMID: 10080090 DOI: 10.1115/1.2798043] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The incorporation of monolayers of cultured hepatocytes into an extracorporeal perfusion system has become a promising approach for the development of a temporary bioartificial liver (BAL) support system. In this paper we present a numerical investigation of the oxygen tension, shear stress, and pressure drop in a bioreactor for a BAL composed of plasma-perfused chambers containing monolayers of porcine hepatocytes. The chambers consist of microfabricated parallel disks with center-to-edge radial flow. The oxygen uptake rate (OUR), measured in vitro for porcine hepatocytes, was curve-fitted using Michaelis-Menten kinetics for simulation of the oxygen concentration profile. The effect of different parameters that may influence the oxygen transport inside the chambers, such as the plasma flow rate, the chamber height, the initial oxygen tension in the perfused plasma, the OUR, and K(m) was investigated. We found that both the plasma flow rate and the initial oxygen tension may have an important effect upon oxygen transport. Increasing the flow rate and/or the inlet oxygen tension resulted in improved oxygen transport to cells in the radial-flow microchannels, and allowed significantly greater diameter reactor without oxygen limitation to the hepatocytes. In the range investigated in this paper (10 microns < H < 100 microns), and for a constant plasma flow rate, the chamber height, H, had a negligible effect on the oxygen transport to hepatocytes. On the contrary, it strongly affected the mechanical stress on the cells that is also crucial for the successful design of the BAL reactors. A twofold decrease in chamber height from 50 to 25 microns produced approximately a fivefold increase in maximal shear stress at the inlet of the reactor from 2 to 10 dyn/cm2. Further decrease in chamber height resulted in shear stress values that are physiologically unrealistic. Therefore, the channel height needs to be carefully chosen in a BAL design to avoid deleterious hydrodynamic effects on hepatocytes.
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Affiliation(s)
- G A Ledezma
- Center for Engineering in Medicine, Massachusetts General Hospital, Shriners Burns Hospital, Harvard Medical School, Boston 02114, USA
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Folch A, Ayon A, Hurtado O, Schmidt MA, Toner M. Molding of deep polydimethylsiloxane microstructures for microfluidics and biological applications. J Biomech Eng 1999; 121:28-34. [PMID: 10080086 DOI: 10.1115/1.2798038] [Citation(s) in RCA: 139] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Here we demonstrate the microfabrication of deep (> 25 microns) polymeric microstructures created by replica-molding polydimethylsiloxane (PDMS) from microfabricated Si substrates. The use of PDMS structures in microfluidics and biological applications is discussed. We investigated the feasibility of two methods for the microfabrication of the Si molds: deep plasma etch of silicon-on-insulator (SOI) wafers and photolithographic patterning of a spin-coated photoplastic layer. Although the SOI wafers can be patterned at higher resolution, we found that the inexpensive photoplastic yields similar replication fidelity. The latter is mostly limited by the mechanical stability of the replicated PDMS structures. As an example, we demonstrate the selective delivery of different cell suspensions to specific locations of a tissue culture substrate resulting in micropatterns of attached cells.
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Affiliation(s)
- A Folch
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Shriners Burns Hospital, Boston 02139, USA
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Folch A, Martí J, Codina R, Vázquez M. A numerical model for temporal variations during explosive central vent eruptions. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98jb01671] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
We present a method to produce micropatterns of cells on tissue culture substrates. A network of deep elastomeric microchannels defining the desired pattern is sealed onto the surface of interest, and a protein template is created by injecting sub-milliliter quantities of protein solution into the microchannels. Protein adsorbs only on the areas that were exposed to the microflow. After the channels are flushed and the elastomer is removed, cells attach only on the protein template. Micropatterns of collagen or fibronectin were used to selectively adhere cells on various biomedical polymers and on heterogeneous or microtextured substrates. Since the bare substrate areas remain apt for seeding other, more adhesive cell types such as fibroblasts, we were able to create micropatterned co-cultures. Our method allows for inexpensive patterning of a rich assortment of biomolecules, cells, and surfaces under physiological conditions.
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Affiliation(s)
- A Folch
- Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Shriners Burns Hospital, and Harvard Medical School, Boston, Massachusetts 02114, USA
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Marco V, Codoñer P, Valls V, Folch A, de Laviada T, Paredes C, Brines J, Sáez G. Erythrocyte levels of antioxidant enzyme systems in normal early neonatal period. Clin Nutr 1990. [DOI: 10.1016/0261-5614(90)90129-g] [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: 10/26/2022]
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González Bernáldez JA, Folch A, Fontestad A, García Mora R, Sánchez J, Zabala P. [The diabetic patient before surgery]. Rev Esp Anestesiol Reanim 1978; 25:471-6. [PMID: 749076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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