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Bischops AC, Sieper L, Dukart J, Schaal NK, Reinauer C, Oommen PT, Tomoiaga C, David O, Mayatepek E, Meissner T. Resilience strengthening in youth with a chronic medical condition: a randomized controlled feasibility trial of a combined app and coaching program. Eur Child Adolesc Psychiatry 2024:10.1007/s00787-024-02395-w. [PMID: 38431540 DOI: 10.1007/s00787-024-02395-w] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 02/11/2024] [Indexed: 03/05/2024]
Abstract
Youth with a chronic medical condition (CMC) are often affected by comorbid mental disorders. Resilience-strengthening interventions can protect youth's mental health, yet evidence-based programs remain scarce. To address this lack, this study aimed to evaluate the feasibility of a dual approach combining app-based resilience training and cognitive behavioral group coaching. Fifty-one youths with CMC treated at a German university children's hospital aged 12-16 years were recruited. They were randomly assigned to a combined app game and coaching intervention or sole app gameplay. At pre-, post-intervention, and at a 2-month follow-up resilience, automatic negative thoughts and an app and coaching evaluation were assessed. Feasibility was defined as a recruitment rate of 70%, an 85% adherence rate for the REThink game, and 70% participation in both coaching sessions. Feasibility criteria were reached for coaching participation but not for recruitment or app adherence. While both the REThink game app and coaching intervention had high acceptance rates among youth with CMC, participants receiving additional coaching sessions showed higher satisfaction and adherence rates. Participants preferred remote to in-person meetings. The findings support a combination of a gamification app approach with online group coaching. Group coaching can improve adherence while online options increase accessibility. Future research should focus on testing in diverse participant samples, language, and age-adapted updates of the REThink game app. These findings provide guidance for increasing adherence in future intervention studies in youth with CMC cohorts.
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Affiliation(s)
- Anne Christine Bischops
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Moorenstrasse 5, 40225, Düsseldorf, Germany.
| | - L Sieper
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Moorenstrasse 5, 40225, Düsseldorf, Germany
| | - J Dukart
- Institute for Neurosciences and Medicine: Brain and Behavior (INM-7), Research Center Jülich, Jülich, Germany
- Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - N K Schaal
- Department of Experimental Psychology, Heinrich Heine University, Düsseldorf, Germany
| | - C Reinauer
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Moorenstrasse 5, 40225, Düsseldorf, Germany
| | - P T Oommen
- Division of Pediatric Rheumatology, Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | - C Tomoiaga
- International Institute for the Advanced Studies of Psychotherapy and Applied Mental Health, Babes-Bolyai University, Cluj-Napoca, Romania
| | - O David
- International Institute for the Advanced Studies of Psychotherapy and Applied Mental Health, Babes-Bolyai University, Cluj-Napoca, Romania
| | - E Mayatepek
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Moorenstrasse 5, 40225, Düsseldorf, Germany
| | - T Meissner
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Moorenstrasse 5, 40225, Düsseldorf, Germany
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Avry F, David O, Arlicot N, Darsin-Bettinger D. DaTSCAN® dilution with 0.9% NaCl - A stability evaluation. Appl Radiat Isot 2023; 201:111009. [PMID: 37660499 DOI: 10.1016/j.apradiso.2023.111009] [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: 11/09/2022] [Revised: 06/18/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023]
Abstract
123I-ioflupane (DaTSCAN®, GE) is a well-known ready-to-use radiopharmaceutical employed as a visualizing tool of the brain dopamine transporter receptor distribution. According to the Summary of Product Characteristics recommendations, we evaluated the stability of the DaTSCAN® after a 0.9% sodium chloride solution dilution. No significant increase in free 123I-iodide was revealed between diluted and undiluted samples over a 1-h timeframe. This stability in sodium chloride can compensate for potential dilution error and offers a suitable alternative method for syringing DaTSCAN®.
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Affiliation(s)
- F Avry
- CHRU de Tours, Tours, France.
| | - O David
- CHR d'Orléans, Unité de Radiopharmacie, Orléans, France
| | - N Arlicot
- CHRU de Tours, Tours, France; UMR 1253, iBrain, Université de Tours, INSERM, Tours, France; INSERM CIC 1415, Université de Tours, INSERM, Tours, France.
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Gould NL, Scherer GR, Carvalho S, Shurrush K, Kayyal H, Edry E, Elkobi A, David O, Foqara M, Thakar D, Pavesi T, Sharma V, Walker M, Maitland M, Dym O, Albeck S, Peleg Y, Germain N, Babaev I, Sharir H, Lalzar M, Shklyar B, Hazut N, Khamaisy M, Lévesque M, Lajoie G, Avoli M, Amitai G, Lefker B, Subramanyam C, Shilton B, Barr H, Rosenblum K. Specific quinone reductase 2 inhibitors reduce metabolic burden and reverse Alzheimer's disease phenotype in mice. J Clin Invest 2023; 133:e162120. [PMID: 37561584 PMCID: PMC10541198 DOI: 10.1172/jci162120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/08/2023] [Indexed: 08/12/2023] Open
Abstract
Biological aging can be described as accumulative, prolonged metabolic stress and is the major risk factor for cognitive decline and Alzheimer's disease (AD). Recently, we identified and described a quinone reductase 2 (QR2) pathway in the brain, in which QR2 acts as a removable memory constraint and metabolic buffer within neurons. QR2 becomes overexpressed with age, and it is possibly a novel contributing factor to age-related metabolic stress and cognitive deficit. We found that, in human cells, genetic removal of QR2 produced a shift in the proteome opposing that found in AD brains while simultaneously reducing oxidative stress. We therefore created highly specific QR2 inhibitors (QR2is) to enable evaluation of chronic QR2 inhibition as a means to reduce biological age-related metabolic stress and cognitive decline. QR2is replicated results obtained by genetic removal of QR2, while local QR2i microinjection improved hippocampal and cortical-dependent learning in rats and mice. Continuous consumption of QR2is in drinking water improved cognition and reduced pathology in the brains of AD-model mice (5xFAD), with a noticeable between-sex effect on treatment duration. These results demonstrate the importance of QR2 activity and pathway function in the healthy and neurodegenerative brain and what we believe to be the great therapeutic potential of QR2is as first-in-class drugs.
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Affiliation(s)
| | - Gila R. Scherer
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Silvia Carvalho
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Khriesto Shurrush
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Haneen Kayyal
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Efrat Edry
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
- The Centre for Genetic Manipulation in the Brain, University of Haifa, Haifa, Israel
| | - Alina Elkobi
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Orit David
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Maria Foqara
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Darshit Thakar
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Tommaso Pavesi
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Vijendra Sharma
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | - Matthew Walker
- Department of Biochemistry, The University of Western Ontario, London, Ontario, Canada
| | - Matthew Maitland
- Department of Biochemistry, The University of Western Ontario, London, Ontario, Canada
| | - Orly Dym
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Shira Albeck
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Yoav Peleg
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Nicolas Germain
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Ilana Babaev
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Haleli Sharir
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | | | - Boris Shklyar
- Bioimaging Unit, Faculty of Natural Sciences, University of Haifa, Haifa, Israel
| | - Neta Hazut
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Mohammad Khamaisy
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Maxime Lévesque
- Montreal Neurological Institute-Hospital and Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Gilles Lajoie
- Department of Biochemistry, The University of Western Ontario, London, Ontario, Canada
| | - Massimo Avoli
- Montreal Neurological Institute-Hospital and Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Gabriel Amitai
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Bruce Lefker
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Chakrapani Subramanyam
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Brian Shilton
- Department of Biochemistry, The University of Western Ontario, London, Ontario, Canada
| | - Haim Barr
- Wohl Institute for Drug Discovery of the Nancy and Stephen Grand Israeli National Center for Personalized Medicine (GINCPM), Weizmann Institute of Science, Rehovot, Israel
| | - Kobi Rosenblum
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
- The Centre for Genetic Manipulation in the Brain, University of Haifa, Haifa, Israel
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Mikl M, Eletto D, Nijim M, Lee M, Lafzi A, Mhamedi F, David O, Sain SB, Handler K, Moor AE. A massively parallel reporter assay reveals focused and broadly encoded RNA localization signals in neurons. Nucleic Acids Res 2022; 50:10643-10664. [PMID: 36156153 PMCID: PMC9561380 DOI: 10.1093/nar/gkac806] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 08/24/2022] [Accepted: 09/08/2022] [Indexed: 11/14/2022] Open
Abstract
Asymmetric subcellular mRNA localization allows spatial regulation of gene expression and functional compartmentalization. In neurons, localization of specific mRNAs to neurites is essential for cellular functioning. However, it is largely unknown how transcript sorting works in a sequence-specific manner. Here, we combined subcellular transcriptomics and massively parallel reporter assays and tested ∼50 000 sequences for their ability to localize to neurites. Mapping the localization potential of >300 genes revealed two ways neurite targeting can be achieved: focused localization motifs and broadly encoded localization potential. We characterized the interplay between RNA stability and localization and identified motifs able to bias localization towards neurite or soma as well as the trans-acting factors required for their action. Based on our data, we devised machine learning models that were able to predict the localization behavior of novel reporter sequences. Testing this predictor on native mRNA sequencing data showed good agreement between predicted and observed localization potential, suggesting that the rules uncovered by our MPRA also apply to the localization of native full-length transcripts.
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Affiliation(s)
- Martin Mikl
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland.,Department of Human Biology, University of Haifa, Haifa, Israel
| | - Davide Eletto
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Malak Nijim
- Department of Human Biology, University of Haifa, Haifa, Israel
| | - Minkyoung Lee
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Atefeh Lafzi
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Farah Mhamedi
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Orit David
- Department of Human Biology, University of Haifa, Haifa, Israel
| | - Simona Baghai Sain
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Kristina Handler
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Andreas E Moor
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
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Chukwu EE, Musa AZ, Enwuru C, Ohihion A, Bamidele T, Olukosi A, Idigbe I, Osuolale KA, Gab-Okafor C, Salako A, David O, Otuonye N, David A, Toyosi R, Aina O, Adewale B, Odunukwe NN, Ezechi O, Audu RA, Salako BL. Determinants of Antimicrobial Use for Covid-19 Related Symptoms among Nigerians. West Afr J Med 2021; 38:213-221. [PMID: 33764727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Antimicrobial use plays a key role in development and spread of antimicrobial resistance. Following the global coronavirus disease 2019 (COVID-19) pandemic and the report of the first confirmed case in Nigeria, several states embarked on either a full or partial lockdown as a measure to prevent or curtail the spread of the virus with its attendant challenges. This survey was designed to provide a snapshot of public antimicrobial use and common perception related to antimicrobial use for COVID-19 related symptoms among Nigerian populace. METHODS We developed and tested a 29-question electronic questionnaire with Google forms asking respondents about their antimicrobial use and perceptions regarding appropriate antimicrobial use for real or perceived symptoms during the outbreak period. Respondents aged 18 years and above were recruited through crowd sourcing and they received the link to the survey tool through emails and social media including WhatsApp, Twitter, Facebook, LinkedIn, and Instagram. All data analysis was performed using SPSS version 26.0. RESULTS A total of 410 responses were received from the six geopolitical zones in Nigeria comprising 200 (48.8%) females and 210 (51.2%) males. Majority (62.9%) of the respondents had taken antimicrobials in the 3 months period preceding the survey, while less than half (46.8%) received prescription for it. Previous intake of antimicrobial for similar illness was a predictor of antimicrobial intake (OR: 0.55, 95%CI: 0.30-1.01). The most consumed antimicrobial was antimalarial drugs, specifically Artemisinin-based combination therapy (43.4%), followed by antibiotics [Ciprofloxacin (20.2%)]. CONCLUSION There was high levels of antimicrobial use for COVID-19 related symptoms by the Nigerian public. This is likely to escalate the already high prevalence of antimicrobial use previously reported and may further fuel the emergence of antimicrobial resistance.
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Affiliation(s)
- E E Chukwu
- Microbiology Department, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - A Z Musa
- Monitoring and Evaluation Unit, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - C Enwuru
- Microbiology Department, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - A Ohihion
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - T Bamidele
- Molecular Biology and Biotechnology Department, Nigerian Institute of Medical Research, Yaba, Lagos State,Nigeria
| | - A Olukosi
- Department of Biochemistry and Nutrition, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - I Idigbe
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - K A Osuolale
- Monitoring and Evaluation Unit, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - C Gab-Okafor
- Department of Biochemistry and Nutrition, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - A Salako
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - O David
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - N Otuonye
- Department of Public Health and Epidemiology, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - A David
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - R Toyosi
- Molecular Biology and Biotechnology Department, Nigerian Institute of Medical Research, Yaba, Lagos State,Nigeria
| | - O Aina
- Department of Public Health and Epidemiology, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - B Adewale
- Department of Public Health and Epidemiology, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - N N Odunukwe
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - O Ezechi
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - R A Audu
- Microbiology Department, Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
| | - B L Salako
- Clinical Science Department of the Nigerian Institute of Medical Research, Yaba, Lagos State, Nigeria
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Simpson D, David O, Nasr F. An unusual presentation of dysarthria in a young patient, a stroke mimic. Acute Med 2021; 20:140-143. [PMID: 34190741] [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: 06/13/2023]
Abstract
Internal carotid artery dissection commonly affects younger patients. We present a case of a previously fit and well 43-year-old gentleman who presented with a sudden onset of slurring of speech, with right-sided tongue deviation and fasciculation on examination. Signs and symptoms began following participation in a home workout class. Magnetic resonance angiography revealed right-sided extracrainal internal carotid artery dissection leading to right-sided unilateral twelfth cranial nerve palsy.
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Affiliation(s)
- D Simpson
- MBChB, Foundation Year 1, Princess Royal Hospital, Telford
| | - O David
- BMedSci, MBBCh, FRCP(UK) MSc, Consultant Stroke Physician, Princess Royal Hospital, Telford
| | - F Nasr
- MD (Damascus University), MSc in Clinical Dermatology (King's College London), MRCGP, General Practitioner Cambrian Medical Centre, Oswestry
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Ashkenazi SL, Polis B, David O, Morris G. Striatal cholinergic interneurons exert inhibition on competing default behaviours controlled by the nucleus accumbens and dorsolateral striatum. Eur J Neurosci 2020; 53:2078-2089. [DOI: 10.1111/ejn.14873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/10/2020] [Accepted: 06/15/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Sivan Lian Ashkenazi
- Sagol Department of Neurobiology University of Haifa Haifa Israel
- Department of Neuroscience Rappaport Faculty of Medicine and Research Institute Technion ‐ Israel Institute of Technology Haifa Israel
| | - Baruh Polis
- Sagol Department of Neurobiology University of Haifa Haifa Israel
- The Azrieli Faculty of Medicine Bar‐Ilan University Safed Israel
| | - Orit David
- Sagol Department of Neurobiology University of Haifa Haifa Israel
| | - Genela Morris
- Sagol Department of Neurobiology University of Haifa Haifa Israel
- Department of Neuroscience Rappaport Faculty of Medicine and Research Institute Technion ‐ Israel Institute of Technology Haifa Israel
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David O, Barrera I, Gould N, Gal-Ben-Ari S, Rosenblum K. D1 Dopamine Receptor Activation Induces Neuronal eEF2 Pathway-Dependent Protein Synthesis. Front Mol Neurosci 2020; 13:67. [PMID: 32499677 PMCID: PMC7242790 DOI: 10.3389/fnmol.2020.00067] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/07/2020] [Indexed: 12/31/2022] Open
Abstract
Dopamine, alongside other neuromodulators, defines brain and neuronal states, inter alia through regulation of global and local mRNA translation. Yet, the signaling pathways underlying the effects of dopamine on mRNA translation and psychiatric disorders are not clear. In order to examine the molecular pathways downstream of dopamine receptors, we used genetic, pharmacologic, biochemical, and imaging methods, and found that activation of dopamine receptor D1 but not D2 leads to rapid dephosphorylation of eEF2 at Thr56 but not eIF2α in cortical primary neuronal culture in a time-dependent manner. NMDA receptor, mTOR, and ERK pathways are upstream of the D1 receptor-dependent eEF2 dephosphorylation and essential for it. Furthermore, D1 receptor activation resulted in a major reduction in dendritic eEF2 phosphorylation levels. D1-dependent eEF2 dephosphorylation results in an increase of BDNF and synapsin2b expression which was followed by a small yet significant increase in general protein synthesis. These results reveal the role of dopamine D1 receptor in the regulation of eEF2 pathway translation in neurons and present eEF2 as a promising therapeutic target for addiction and depression as well as other psychiatric disorders.
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Affiliation(s)
- Orit David
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Iliana Barrera
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel.,School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, United Kingdom
| | - Nathaniel Gould
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | | | - Kobi Rosenblum
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel.,Center for Gene Manipulation in the Brain, University of Haifa, Haifa, Israel
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9
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Rodrigues F, Ribeiro JF, Anacleto PA, Fouchard A, David O, Sarro PM, Mendes PM. Fabrication and characterization of polyimide-based 'smooth' titanium nitride microelectrode arrays for neural stimulation and recording. J Neural Eng 2019; 17:016010. [PMID: 31614339 DOI: 10.1088/1741-2552/ab4dbb] [Citation(s) in RCA: 7] [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] [Indexed: 01/05/2023]
Abstract
OBJECTIVE As electrodes are required to interact with sub-millimeter neural structures, innovative microfabrication processes are required to enable fabrication of microdevices involved in such stimulation and/or recording. This requires the development of highly integrated and miniaturized systems, comprising die-integration-compatible technology and flexible microelectrodes. To elicit selective stimulation and recordings of sub-neural structures, such microfabrication process flow can beneficiate from the integration of titanium nitride (TiN) microelectrodes onto a polyimide substrate. Finally, assembling onto cuffs is required, as well as electrode characterization. APPROACH Flexible TiN microelectrode array integration and miniaturization was achieved through microfabrication technology based on microelectromechanical systems (MEMS) and complementary metal-oxide semiconductor processing techniques and materials. They are highly reproducible processes, granting extreme control over the feature size and shape, as well as enabling the integration of on-chip electronics. This design is intended to enhance the integration of future electronic modules, with high gains on device miniaturization. MAIN RESULTS (a) Fabrication of two electrode designs, (1) 2 mm long array with 14 TiN square-shaped microelectrodes (80 × 80 µm2), and (2) an electrode array with 2 mm × 80 µm contacts. The average impedances at 1 kHz were 59 and 5.5 kΩ, respectively, for the smaller and larger contacts. Both designs were patterned on a flexible substrate and directly interconnected with a silicon chip. (b) Integration of flexible microelectrode array onto a cuff electrode designed for acute stimulation of the sub-millimeter nerves. (c) The TiN electrodes exhibited capacitive charge transfer, a water window of -0.6 V to 0.8 V, and a maximum charge injection capacity of 154 ± 16 µC cm-2. SIGNIFICANCE We present the concept, fabrication and characterization of composite and flexible cuff electrodes, compatible with post-processing and MEMS packaging technologies, which allow for compact integration with control, readout and RF electronics. The fabricated TiN microelectrodes were electrochemically characterized and exhibited a comparable performance to other state-of-the-art electrodes for neural stimulation and recording. Therefore, the presented TiN-on-polyimide microelectrodes, released from silicon wafers, are a promising solution for neural interfaces targeted at sub-millimeter nerves, which may benefit from future upgrades with die-electronic modules.
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Affiliation(s)
- F Rodrigues
- CMEMS-UMinho, University of Minho, Braga, Portugal. Electronics Components, Technology, and Materials Lab, Else Kooi Laboratory, Delft University of Technology, Delft, The Netherlands. Author to whom any correspondence should be addressed
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Raffin E, Harquel S, Passera B, Siebner H, David O. Different input-output properties throughout the cortex as revealed by TMS-EEG. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.678] [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: 10/27/2022] Open
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11
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David O, Sinha R, Robinson K, Cardone D. The Prevalence of Anaemia, Hypochromia and Microcytosis in Preoperative Cardiac Surgical Patients. Anaesth Intensive Care 2019; 41:316-21. [DOI: 10.1177/0310057x1304100307] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- O. David
- Royal Adelaide Hospital, Department of Anaesthesia, Adelaide, South Australia, Australia
| | - R. Sinha
- Royal Adelaide Hospital, Department of Anaesthesia, Adelaide, South Australia, Australia
- Faculty of Health Sciences, Flinders University
| | - K. Robinson
- Royal Adelaide Hospital, Department of Anaesthesia, Adelaide, South Australia, Australia
- Australian Red Cross Blood Service and Clinical Lead, BloodSafe Program, SA Health
| | - D. Cardone
- Royal Adelaide Hospital, Department of Anaesthesia, Adelaide, South Australia, Australia
- Department of Anaesthesia, Royal Adelaide Hospital and Senior Clinical Lecturer, Faculty of Acute Care Medicine, University of Adelaide
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12
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Huang L, David O, Cabay R, Valyi-Nagy K, Macias V, Weichselbaum R, Spiotto M. Molecular Classification of Lymph Node Metastases in HPV-Negative Head and Neck Cancers Identify Distinct Phenotypes That Predict for Survival. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.102] [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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Mohamed J, Scott B, David O, Burnham W. 1. The development of propagated discharge and behavioural arrest in hippocampal and amygdala kindled seizures. Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Adaikkan C, Taha E, Barrera I, David O, Rosenblum K. Calcium/Calmodulin-Dependent Protein Kinase II and Eukaryotic Elongation Factor 2 Kinase Pathways Mediate the Antidepressant Action of Ketamine. Biol Psychiatry 2018; 84:65-75. [PMID: 29395043 DOI: 10.1016/j.biopsych.2017.11.028] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 11/12/2017] [Accepted: 11/13/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Ketamine is an N-methyl-D-aspartate receptor antagonist, which on administration produces fast-acting antidepressant responses in patients with major depressive disorder. Yet, the mechanism underlying the antidepressant action of ketamine remains unclear. METHODS To unravel the mechanism of action of ketamine, we treated wild-type C57BL/6 mice with calcium/calmodulin-dependent protein kinase II (CaMKII) specific inhibitor tatCN21 peptide. We also used eukaryotic elongation factor 2 kinase (eEF2K) (also known as CaMKIII) knockout mice. We analyzed the effects biochemically and behaviorally, using the forced swim, tail suspension, and novelty suppressed feeding tests. RESULTS Consistent with the literature, one of the major pathways mediating the antidepressant action of ketamine was reduction of phosphorylation of eEF2 via eEF2K. Specifically, knocking out eEF2K in mice eliminated phosphorylation of eEF2 at threonine at position 56, resulting in increased protein synthesis, and made mice resistant both biochemically and behaviorally to the antidepressant effects of ketamine. In addition, administration of ketamine led to differential regulation of CaMKII function, manifested as autoinhibition (pT305 phosphorylation) followed by autoactivation (pT286) of CaMKIIα in the hippocampus and cortex. The inhibition phase of CaMKII, which lasted 10 to 20 minutes after administration of ketamine, occurred concurrently with eEF2K-dependent increased protein synthesis. Moreover, ketamine administration-dependent delayed induction of GluA1 (24 hours) was regulated by the activation of CaMKII. Importantly, systemic administration of the CaMKII inhibitor tatCN21 increased global protein synthesis and induced behavioral resistance to ketamine. CONCLUSIONS Our data suggest that drugs that selectively target CaMKs and regulate protein synthesis offer novel strategies for treatment of major depressive disorder.
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Affiliation(s)
| | - Elham Taha
- Sagol Department of Neurobiology, University of Haifa, Mount Carmel, Haifa, Israel
| | - Iliana Barrera
- Sagol Department of Neurobiology, University of Haifa, Mount Carmel, Haifa, Israel
| | - Orit David
- Sagol Department of Neurobiology, University of Haifa, Mount Carmel, Haifa, Israel
| | - Kobi Rosenblum
- Sagol Department of Neurobiology, University of Haifa, Mount Carmel, Haifa, Israel; Center for Gene Manipulation in the Brain, University of Haifa, Mount Carmel, Haifa, Israel.
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Raffin E, Harquel S, Passera B, Favre P, Siebner H, David O, Polosan M. P265 Linking dysfunctional premotor-to-motor connectivity to disease severity of obsessive–compulsive disorder – A robotic dual-site TMS study. Clin Neurophysiol 2017. [DOI: 10.1016/j.clinph.2016.10.376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Voon V, Droux F, Morris L, Chabardes S, Bougerol T, David O, Krack P, Polosan M. Decisional impulsivity and the associative-limbic subthalamic nucleus in obsessive-compulsive disorder: subthalamic stimulation and intrinsic functional connectivity. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.392] [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: 10/20/2022] Open
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Pouyatos B, Nemoz C, Chabrol T, Potez M, Bräuer E, Renaud L, Pernet-Gallay K, Estève F, David O, Kahane P, Laissue JA, Depaulis A, Serduc R. Synchrotron X-ray microtransections: a non invasive approach for epileptic seizures arising from eloquent cortical areas. Sci Rep 2016; 6:27250. [PMID: 27264273 PMCID: PMC4893707 DOI: 10.1038/srep27250] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 01/26/2016] [Accepted: 05/13/2016] [Indexed: 11/09/2022] Open
Abstract
Synchrotron-generated X-ray (SRX) microbeams deposit high radiation doses to submillimetric targets whilst minimizing irradiation of neighboring healthy tissue. We developed a new radiosurgical method which demonstrably transects cortical brain tissue without affecting adjacent regions. We made such image-guided SRX microtransections in the left somatosensory cortex in a rat model of generalized epilepsy using high radiation doses (820 Gy) in thin (200 μm) parallel slices of tissue. This procedure, targeting the brain volume from which seizures arose, altered the abnormal neuronal activities for at least 9 weeks, as evidenced by a decrease of seizure power and coherence between tissue slices in comparison to the contralateral cortex. The brain tissue located between transections stayed histologically normal, while the irradiated micro-slices remained devoid of myelin and neurons two months after irradiation. This pre-clinical proof of concept highlights the translational potential of non-invasive SRX transections for treating epilepsies that are not eligible for resective surgery.
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Affiliation(s)
- B Pouyatos
- Inserm, U1216, F-38000 Grenoble, France.,Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,Synapcell S.A.S - Bâtiment Biopolis - 5 avenue du Grand Sablon, La Tronche, France
| | | | - T Chabrol
- Univ. Grenoble Alpes, EA RSRM, F-38000 Grenoble, France
| | - M Potez
- Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France
| | | | - L Renaud
- CNRS; CE2F PRIM UMS3537; Marseille, France.,Aix Marseille Université; Centre d'Exploration Fonctionnelle et de Formation; France
| | - K Pernet-Gallay
- Inserm, U1216, F-38000 Grenoble, France.,Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France
| | - F Estève
- Univ. Grenoble Alpes, EA RSRM, F-38000 Grenoble, France
| | - O David
- Inserm, U1216, F-38000 Grenoble, France.,Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France
| | - P Kahane
- Inserm, U1216, F-38000 Grenoble, France.,Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,CHU Grenoble Alpes, F-38000 Grenoble, France
| | | | - A Depaulis
- Inserm, U1216, F-38000 Grenoble, France.,Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France
| | - R Serduc
- Univ. Grenoble Alpes, EA RSRM, F-38000 Grenoble, France
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19
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Magnard R, Vachez Y, Carcenac C, Krack P, David O, Savasta M, Boulet S, Carnicella S. What can rodent models tell us about apathy and associated neuropsychiatric symptoms in Parkinson's disease? Transl Psychiatry 2016; 6:e753. [PMID: 26954980 PMCID: PMC4872443 DOI: 10.1038/tp.2016.17] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/11/2016] [Accepted: 01/19/2016] [Indexed: 12/19/2022] Open
Abstract
In addition to classical motor symptoms, Parkinson's disease (PD) patients display incapacitating neuropsychiatric manifestations, such as apathy, anhedonia, depression and anxiety. These hitherto generally neglected non-motor symptoms, have gained increasing interest in medical and scientific communities over the last decade because of the extent of their negative impact on PD patients' quality of life. Although recent clinical and functional imaging studies have provided useful information, the pathophysiology of apathy and associated affective impairments remains elusive. Our aim in this review is to summarize and discuss recent advances in the development of rodent models of PD-related neuropsychiatric symptoms using neurotoxin lesion-based approaches. The data collected suggest that bilateral and partial lesions of the nigrostriatal system aimed at inducing reliable neuropsychiatric-like deficits while avoiding severe motor impairments that may interfere with behavioral evaluation, is a more selective and efficient strategy than medial forebrain bundle lesions. Moreover, of all the different classes of pharmacological agents, D2/D3 receptor agonists such as pramipexole appear to be the most efficient treatment for the wide range of behavioral deficits induced by dopaminergic lesions. Lesion-based rodent models, therefore, appear to be relevant tools for studying the pathophysiology of the non-motor symptoms of PD. Data accumulated so far confirm the causative role of dopaminergic depletion, especially in the nigrostriatal system, in the development of behavioral impairments related to apathy, depression and anxiety. They also put forward D2/D3 receptors as potential targets for the treatment of such neuropsychiatric symptoms in PD.
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Affiliation(s)
- R Magnard
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
| | - Y Vachez
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
| | - C Carcenac
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
| | - P Krack
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France,Movement Disorder Unit, Department of Psychiatry and Neurology, CHU de Grenoble, Grenoble, France
| | - O David
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
| | - M Savasta
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
| | - S Boulet
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
| | - S Carnicella
- Inserm U1216, Grenoble, France,Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France,Inserm U1216, Grenoble Institute of Neuroscience, Site Santé La Tronche - BP 170, 38042 Grenoble, France. E-mail:
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20
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Abstract
Mild generation of vinylidene carbene from α-amino nitrile is the basis of a new synthesis of homopropargylamines.
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Affiliation(s)
- P. Quinodoz
- Institut Lavoisier de Versailles
- UMR 8180. Université de Versailles St-Quentin-en-Yvelines
- Université Paris-Saclay
- 78035 Versailles Cedex
- France
| | - K. Wright
- Institut Lavoisier de Versailles
- UMR 8180. Université de Versailles St-Quentin-en-Yvelines
- Université Paris-Saclay
- 78035 Versailles Cedex
- France
| | - B. Drouillat
- Institut Lavoisier de Versailles
- UMR 8180. Université de Versailles St-Quentin-en-Yvelines
- Université Paris-Saclay
- 78035 Versailles Cedex
- France
| | - O. David
- Institut Lavoisier de Versailles
- UMR 8180. Université de Versailles St-Quentin-en-Yvelines
- Université Paris-Saclay
- 78035 Versailles Cedex
- France
| | - J. Marrot
- Institut Lavoisier de Versailles
- UMR 8180. Université de Versailles St-Quentin-en-Yvelines
- Université Paris-Saclay
- 78035 Versailles Cedex
- France
| | - F. Couty
- Institut Lavoisier de Versailles
- UMR 8180. Université de Versailles St-Quentin-en-Yvelines
- Université Paris-Saclay
- 78035 Versailles Cedex
- France
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Droux F, Voon V, Chabardes S, Bougerol T, Krainik A, David O, Krack P, Polosan M. Influence de la stimulation cérébrale profonde du noyau sous-thalamique dans le trouble obsessionnel compulsif sur deux formes d’impulsivité. Eur Psychiatry 2015. [DOI: 10.1016/j.eurpsy.2015.09.229] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
IntroductionL’accumulation de preuves avant une prise de décision, et la capacité d’attendre avant d’agir, respectivement nommées « impulsivité décisionnelle » et « impulsivité différée », sont des formes du contrôle du comportement, dysfonctionnel dans le trouble obsessionnel compulsif (TOC). Ce travail a exploré les effets de la stimulation cérébrale profonde (SCP) du noyau sous thalamique (NST) chez ces patients et sur ces deux types d’impulsivité.Matériel et méthodesDouze patients souffrant d’un TOC traités par SCP du NST ont été inclus dans une étude randomisée en double aveugle utilisant un design croisé au cours de laquelle chacun a réalisé une évaluation comportementale en condition de stimulation ON et OFF. Leurs performances ont été comparées à celles d’un groupe de 24 sujets témoins sains appariés (âge, sexe). « L’impulsivité différée » était évaluée par la tâche de « temps de réaction en série à quatre choix », requérant une réponse motrice après avoir détecté un stimulus cible, et « l’impulsivité décisionnelle » via le « test des perles » impliquant une décision après un cumul variable d’informations laissé à l’appréciation du sujet.RésultatsLa tâche de « temps de réaction en série à quatre choix » a montré que les sujets sains avaient un nombre moindre de réponses prématurées que les patients en condition ON (p = 0,007), différence non retrouvée en condition OFF (p = 0,073), suggérant une augmentation de « l’impulsivité différée » en ON. Le test des perles a montré que les patients en condition OFF accumulaient davantage de preuves que les sujets sains avant une prise de décision (p = 0,021), et que cette différence disparaissait en condition ON (p = 0,017), témoignant d’une augmentation de « l’impulsivité décisionnelle » en ON.ConclusionL’augmentation retrouvée de ces deux types d’impulsivité pourrait être impliquée dans l’effet thérapeutique de la SCP du NST.
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Prabhu S, Chabardès S, Sherdil A, Devergnas A, Michallat S, Bhattacharjee M, Mathieu H, David O, Piallat B. Effect of subthalamic nucleus stimulation on penicillin induced focal motor seizures in primate. Brain Stimul 2014; 8:177-84. [PMID: 25511796 DOI: 10.1016/j.brs.2014.10.017] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 09/13/2014] [Accepted: 10/26/2014] [Indexed: 10/24/2022] Open
Abstract
BACKGROUND Drug-resistant motor epilepsies are particularly incapacitating for the patients. In a primate model of focal motor seizures induced by intracortical injection of penicillin, we recently showed that seizures propagated from the motor cortex towards the basal ganglia. OBJECTIVE Using the same animal model here, we hypothesized that disruption of subthalamic nucleus (STN) activity by chronic high frequency stimulation (HFS) could modify pathological excessive cortical synchronisation occurring during focal motor seizures, and therefore could reduce seizure activity. METHODS Two monkeys were chronically implanted with one electrode positioned into the STN. In each experiment, seizures were induced during 6 hours by injecting penicillin into the motor cortex. During stimulation sessions, HFS-STN was applied at the beginning of penicillin injection. RESULTS Our results indicate that HFS-STN improved focal motor seizures by delaying the occurrence of the first seizure, by decreasing the number of seizures by 47% and therefore the total time spent seizing by 53% compared to control. These results argue for a therapeutic use of HFS-STN in motor seizures because they were obtained in a very severe primate model of motor status similar to that seen in human. Furthermore, HFS-STN was much more efficient than direct cortical HFS of the epileptic focus, which we already tested in the same primate model. CONCLUSIONS The present study suggests that HFS-STN could be used as an experimental therapy when other therapeutic strategies are not possible or have failed in humans suffering from motor epilepsy but the present study still warrants controlled studies in humans.
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Affiliation(s)
- S Prabhu
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | - S Chabardès
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France; CHU de Grenoble, Hôpital Michallon F-38000 Grenoble, France
| | - A Sherdil
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | | | | | - M Bhattacharjee
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | - H Mathieu
- UMS IRMaGe, F-38000 Grenoble, France
| | - O David
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | - B Piallat
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France.
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David O, Barrera I, Chinnakkaruppan A, Kaphzan H, Nakazawa T, Yamamoto T, Rosenblum K. Dopamine-induced tyrosine phosphorylation of NR2B (Tyr1472) is essential for ERK1/2 activation and processing of novel taste information. Front Mol Neurosci 2014; 7:66. [PMID: 25100942 PMCID: PMC4103512 DOI: 10.3389/fnmol.2014.00066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 07/02/2014] [Indexed: 01/14/2023] Open
Abstract
Understanding the heterosynaptic interaction between glutamatergic and neuromodulatory synapses is highly important for revealing brain function in health and disease. For instance, the interaction between dopamine and glutamate neurotransmission is vital for memory and synaptic plasticity consolidation, and it is known to converge on extracellular signal-regulated kinase (ERK)-MAPK signaling in neurons. Previous studies suggest that dopamine induces N-methyl-D-aspartate (NMDA) receptor phosphorylation at the NR2B Y1472 subunit, influencing receptor internalization at the synaptic plasma membrane. However, it is unclear whether this phosphorylation is upstream to and/or necessary for ERK1/2 activation, which is known to be crucial for synaptic plasticity and memory consolidation. Here, we tested the hypothesis that tyrosine phosphorylation of NR2B at Y1472 is correlated with ERK1/2 activation by dopamine and necessary for it as well. We find that dopamine receptor D1, but not D2, activates ERK1/2 and leads to NR2BY1472 phosphorylation in the mature hippocampus and cortex. Moreover, our results indicate that NR2B Y1472 phosphorylation is necessary for ERK1/2 activation. Importantly, application of dopamine or the D1 receptor agonist SKF38393 to hippocampal slices from NR2B F1472 mutant mice did not result in ERK1/2 activation, suggesting this site is not only correlated with ERK1/2 activation by dopamine stimulation, but also necessary for it. In addition, NR2B F1472 mice show impairment in learning of attenuation of taste neophobia but not associative taste learning. Our study shows that the dopaminergic and glutamatergic transmission converge on the NMDA receptor itself, at the Y1472 site of the NR2B subunit, and that this convergence is essential for ERK1/2 activation in the mature brain and for processing new sensory information in the cortex.
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Affiliation(s)
- Orit David
- Sagol Department of Neurobiology, University of Haifa Haifa, Israel
| | - Iliana Barrera
- Sagol Department of Neurobiology, University of Haifa Haifa, Israel
| | | | - Hanoch Kaphzan
- Sagol Department of Neurobiology, University of Haifa Haifa, Israel
| | - Takanobu Nakazawa
- Division of Oncology, Institute of Medical Science, University of Tokyo Tokyo, Japan
| | - Tadashi Yamamoto
- Division of Oncology, Institute of Medical Science, University of Tokyo Tokyo, Japan
| | - Kobi Rosenblum
- Sagol Department of Neurobiology, University of Haifa Haifa, Israel ; Center for Gene Manipulation in the Brain, University of Haifa Haifa, Israel
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Makowski M, Makowski MR, Wiethoff AJ, Ebersberger HU, David O, Cesati R, Botnar RM. In vivo Charakterisierung von abdominalen Aortenaneurysmen mit einer elastinspezifischen molekularen MR-Sonde. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373479] [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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David O. Antimicrobial Activities of Essential Oils from Hura crepitans (L.), Monodora myristica (Gaertn Dunal) and Xylopia aethiopica (Dunal A. Rich) Seeds. ACTA ACUST UNITED AC 2014. [DOI: 10.9734/bjast/2014/5088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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He BJ, Nolte G, Nagata K, Takano D, Yamazaki T, Fujimaki Y, Maeda T, Satoh Y, Heckers S, George MS, Lopes da Silva F, de Munck JC, Van Houdt PJ, Verdaasdonk RM, Ossenblok P, Mullinger K, Bowtell R, Bagshaw AP, Keeser D, Karch S, Segmiller F, Hantschk I, Berman A, Padberg F, Pogarell O, Scharnowski F, Karch S, Hümmer S, Keeser D, Paolini M, Kirsch V, Koller G, Rauchmann B, Kupka M, Blautzik J, Pogarell O, Razavi N, Jann K, Koenig T, Kottlow M, Hauf M, Strik W, Dierks T, Gotman J, Vulliemoz S, Lu Y, Zhang H, Yang L, Worrell G, He B, Gruber O, Piguet C, Hubl D, Homan P, Kindler J, Dierks T, Kim K, Steinhoff U, Wakai R, Koenig T, Kottlow M, Melie-García L, Mucci A, Volpe U, Prinster A, Salvatore M, Galderisi S, Linden DEJ, Brandeis D, Schroeder CE, Kayser C, Panzeri S, Kleinschmidt A, Ritter P, Walther S, Haueisen J, Lau S, Flemming L, Sonntag H, Maess B, Knösche TR, Lanfer B, Dannhauer M, Wolters CH, Stenroos M, Haueisen J, Wolters C, Aydin U, Lanfer B, Lew S, Lucka F, Ruthotto L, Vorwerk J, Wagner S, Ramon C, Guan C, Ang KK, Chua SG, Kuah WK, Phua KS, Chew E, Zhou H, Chuang KH, Ang BT, Wang C, Zhang H, Yang H, Chin ZY, Yu H, Pan Y, Collins L, Mainsah B, Colwell K, Morton K, Ryan D, Sellers E, Caves K, Throckmorton S, Kübler A, Holz EM, Zickler C, Sellers E, Ryan D, Brown K, Colwell K, Mainsah B, Caves K, Throckmorton S, Collins L, Wennberg R, Ahlfors SP, Grova C, Chowdhury R, Hedrich T, Heers M, Zelmann R, Hall JA, Lina JM, Kobayashi E, Oostendorp T, van Dam P, Oosterhof P, Linnenbank A, Coronel R, van Dessel P, de Bakker J, Rossion B, Jacques C, Witthoft N, Weiner KS, Foster BL, Miller KJ, Hermes D, Parvizi J, Grill-Spector K, Recanzone GH, Murray MM, Haynes JD, Richiardi J, Greicius M, De Lucia M, Müller KR, Formisano E, Smieskova R, Schmidt A, Bendfeldt K, Walter A, Riecher-Rössler A, Borgwardt S, Fusar-Poli P, Eliez S, Schmidt A, Sekihara K, Nagarajan SS, Schoffelen JM, Guggisberg AG, Nolte G, Balazs S, Kermanshahi K, Kiesenhofer W, Binder H, Rattay F, Antal A, Chaieb L, Paulus W, Bodis-Wollner I, Maurer K, Fein G, Camchong J, Johnstone J, Cardenas-Nicolson V, Fiederer LDJ, Lucka F, Yang S, Vorwerk J, Dümpelmann M, Cosandier-Rimélé D, Schulze-Bonhage A, Aertsen A, Speck O, Wolters CH, Ball T, Fuchs M, Wagner M, Kastner J, Tech R, Dinh C, Haueisen J, Baumgarten D, Hämäläinen MS, Lau S, Vogrin SJ, D'Souza W, Haueisen J, Cook MJ, Custo A, Van De Ville D, Vulliemoz S, Grouiller F, Michel CM, Malmivuo J, Aydin U, Vorwerk J, Küpper P, Heers M, Kugel H, Wellmer J, Kellinghaus C, Scherg M, Rampp S, Wolters C, Storti SF, Boscolo Galazzo I, Del Felice A, Pizzini FB, Arcaro C, Formaggio E, Mai R, Manganotti P, Koessler L, Vignal J, Cecchin T, Colnat-Coulbois S, Vespignani H, Ramantani G, Maillard L, Rektor I, Kuba R, Brázdil M, Chrastina J, Rektorova I, van Mierlo P, Carrette E, Strobbe G, Montes-Restrepo V, Vonck K, Vandenberghe S, Ahmed B, Brodely C, Carlson C, Kuzniecky R, Devinsky O, French J, Thesen T, Bénis D, David O, Lachaux JP, Seigneuret E, Krack P, Fraix V, Chabardès S, Bastin J, Jann K, Gee D, Kilroy E, Cannon T, Wang DJ, Hale JR, Mayhew SD, Przezdzik I, Arvanitis TN, Bagshaw AP, Plomp G, Quairiaux C, Astolfi L, Michel CM, Mayhew SD, Mullinger KJ, Bagshaw AP, Bowtell R, Francis ST, Schouten AC, Campfens SF, van der Kooij H, Koles Z, Lind J, Flor-Henry P, Wirth M, Haase CM, Villeneuve S, Vogel J, Jagust WJ, Kambeitz-Ilankovic L, Simon-Vermot L, Gesierich B, Duering M, Ewers M, Rektorova I, Krajcovicova L, Marecek R, Mikl M, Bracht T, Horn H, Strik W, Federspiel A, Schnell S, Höfle O, Stegmayer K, Wiest R, Dierks T, Müller TJ, Walther S, Surmeli T, Ertem A, Eralp E, Kos IH, Skrandies W, Flüggen S, Klein A, Britz J, Díaz Hernàndez L, Ro T, Michel CM, Lenartowicz A, Lau E, Rodriguez C, Cohen MS, Loo SK, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, La Porta P, Verardo AR, Niolu C, Fernandez I, Siracusano A, Flor-Henry P, Lind J, Koles Z, Bollmann S, Ghisleni C, O'Gorman R, Poil SS, Klaver P, Michels L, Martin 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AC, van der Helm FCT, Sorrentino A, Luria G, Aramini R, Hunold A, Funke M, Eichardt R, Haueisen J, Gómez-Aguilar F, Vázquez-Olvera S, Cordova-Fraga T, Castro-López J, Hernández-Gonzalez MA, Solorio-Meza S, Sosa-Aquino M, Bernal-Alvarado JJ, Vargas-Luna M, Vorwerk J, Magyari L, Ludewig J, Oostenveld R, Wolters CH, Vorwerk J, Engwer C, Ludewig J, Wolters C, Sato K, Nishibe T, Furuya M, Yamashiro K, Yana K, Ono T, Puthanmadam Subramaniyam N, Hyttinen J, Lau S, Güllmar D, Flemming L, Haueisen J, Sonntag H, Vorwerk J, Wolters CH, Grasedyck L, Haueisen J, Maeß B, Freitag S, Graichen U, Fiedler P, Strohmeier D, Haueisen J, Stenroos M, Hauk O, Grigutsch M, Felber M, Maess B, Herrmann B, Strobbe G, van Mierlo P, Vandenberghe S, Strobbe G, Cárdenas-Peña D, Montes-Restrepo V, van Mierlo P, Castellanos-Dominguez G, Vandenberghe S, Lanfer B, Paul-Jordanov I, Scherg M, Wolters CH, Ito Y, Sato D, Kamada K, Kobayashi T, Dalal SS, Rampp S, Willomitzer F, Arold O, Fouladi-Movahed S, Häusler G, Stefan H, Ettl S, Zhang S, Zhang Y, Li H, Kong X, Montes-Restrepo V, Strobbe G, van Mierlo P, Vandenberghe S, Wong DDE, Bidet-Caulet A, Knight RT, Crone NE, Dalal SS, Birot G, Spinelli L, Vulliémoz S, Seeck M, Michel CM, Emory H, Wells C, Mizrahi N, Vogrin SJ, Lau S, Cook MJ, Karahanoglu FI, Grouiller F, Caballero-Gaudes C, Seeck M, Vulliemoz S, Van De Ville D, Spinelli L, Megevand P, Genetti M, Schaller K, Michel C, Vulliemoz S, Seeck M, Genetti M, Tyrand R, Grouiller F, Vulliemoz S, Spinelli L, Seeck M, Schaller K, Michel CM, Grouiller F, Heinzer S, Delattre B, Lazeyras F, Spinelli L, Pittau F, Seeck M, Ratib O, Vargas M, Garibotto V, Vulliemoz S, Vogrin SJ, Bailey CA, Kean M, Warren AE, Davidson A, Seal M, Harvey AS, Archer JS, Papadopoulou M, Leite M, van Mierlo P, Vonck K, Boon P, Friston K, Marinazzo D, Ramon C, Holmes M, Koessler L, Rikir E, Gavaret M, Bartolomei F, Vignal JP, Vespignani H, Maillard L, Centeno M, Perani S, Pier K, Lemieux L, Clayden J, Clark C, Pressler R, Cross H, Carmichael DW, Spring A, Bessemer R, Pittman D, Aghakhani Y, Federico P, Pittau F, Grouiller F, Vulliémoz S, Gotman J, Badier JM, Bénar CG, Bartolomei F, Cruto C, Chauvel P, Gavaret M, Brodbeck V, van Leeuwen T, Tagliazzuchi E, Melloni L, Laufs H, Griskova-Bulanova I, Dapsys K, Klein C, Hänggi J, Jäncke L, Ehinger BV, Fischer P, Gert AL, Kaufhold L, Weber F, Marchante Fernandez M, Pipa G, König P, Sekihara K, Hiyama E, Koga R, Iannilli E, Michel CM, Bartmuss AL, Gupta N, Hummel T, Boecker R, Holz N, Buchmann AF, Blomeyer D, Plichta MM, Wolf I, Baumeister S, Meyer-Lindenberg A, Banaschewski T, Brandeis D, Laucht M, Natahara S, Ueno M, Kobayashi T, Kottlow M, Bänninger A, Koenig T, Schwab S, Koenig T, Federspiel A, Dierks T, Jann K, Natsukawa H, Kobayashi T, Tüshaus L, Koenig T, Kottlow M, Achermann P, Wilson RS, Mayhew SD, Assecondi S, Arvanitis TN, Bagshaw AP, Darque A, Rihs TA, Grouiller F, Lazeyras F, Ha-Vinh Leuchter R, Caballero C, Michel CM, Hüppi PS, Hauser TU, Hunt LT, 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Federspiel A, Dierks T, Hauf M, Jann K, Kamada K, Sato D, Ito Y, Okano K, Mizutani N, Kobayashi T, Thelen A, Murray M, Pastena L, Formaggio E, Storti SF, Faralli F, Melucci M, Gagliardi R, Ricciardi L, Ruffino G, Coito A, Macku P, Tyrand R, Astolfi L, He B, Wiest R, Seeck M, Michel C, Plomp G, Vulliemoz S, Fischmeister FPS, Glaser J, Schöpf V, Bauer H, Beisteiner R, Deligianni F, Centeno M, Carmichael DW, Clayden J, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny S, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Dürschmid S, Zaehle T, Pannek H, Chang HF, Voges J, Rieger J, Knight RT, Heinze HJ, Hinrichs H, Tsatsishvili V, Cong F, Puoliväli T, Alluri V, Toiviainen P, Nandi AK, Brattico E, Ristaniemi T, Grieder M, Crinelli RM, Jann K, Federspiel A, Wirth M, Koenig T, Stein M, Wahlund LO, Dierks T, Atsumori H, Yamaguchi R, Okano Y, Sato H, Funane T, Sakamoto K, Kiguchi M, Tränkner A, Schindler S, Schmidt F, Strauß M, Trampel R, Hegerl U, Turner R, Geyer S, Schönknecht P, Kebets V, van Assche M, Goldstein R, van der Meulen M, Vuilleumier P, Richiardi J, Van De Ville D, Assal F, Wozniak-Kwasniewska A, Szekely D, Harquel S, Bougerol T, David O, Bracht T, Jones DK, Horn H, Müller TJ, Walther S, Sos P, Klirova M, Novak T, Brunovsky M, Horacek J, Bares M, Hoschl C C, Fellhauer I, Zöllner FG, Schröder J, Kong L, Essig M, Schad LR, Arrubla J, Neuner I, Hahn D, Boers F, Shah NJ, Neuner I, Arrubla J, Hahn D, Boers F, Jon Shah N, Suriya Prakash M, Sharma R, Kawaguchi H, Kobayashi T, Fiedler P, Griebel S, Biller S, Fonseca C, Vaz F, Zentner L, Zanow F, Haueisen J, Rochas V, Rihs T, Thut G, Rosenberg N, Landis T, Michel C, Moliadze V, Schmanke T, Lyzhko E, Bassüner S, Freitag C, Siniatchkin M, Thézé R, Guggisberg AG, Nahum L, Schnider A, Meier L, Friedrich H, Jann K, Landis B, Wiest R, Federspiel A, Strik W, Dierks T, Witte M, Kober SE, Neuper C, Wood G, König R, Matysiak A, Kordecki W, Sieluzycki C, Zacharias N, Heil P, Wyss C, Boers F, Arrubla J, Dammers J, Kawohl W, Neuner I, Shah NJ, Braboszcz C, Cahn RB, Levy J, Fernandez M, Delorme A, Rosas-Martinez L, Milne E, Zheng Y, Urakami Y, Kawamura K, Washizawa Y, Hiyoshi K, Cichocki A, Giroud N, Dellwo V, Meyer M, Rufener KS, Liem F, Dellwo V, Meyer M, Jones-Rounds JD, Raizada R, Staljanssens W, Strobbe G, van Mierlo P, Van Holen R, Vandenberghe S, Pefkou M, Becker R, Michel C, Hervais-Adelman A, He W, Brock J, Johnson B, Ohla K, Hitz K, Heekeren K, Obermann C, Huber T, Juckel G, Kawohl W, Gabriel D, Comte A, Henriques J, Magnin E, Grigoryeva L, Ortega JP, Haffen E, Moulin T, Pazart L, Aubry R, Kukleta M, Baris Turak B, Louvel J, Crespo-Garcia M, Cantero JL, Atienza M, Connell S, Kilborn K, Damborská A, Brázdil M, Rektor I, Kukleta M, Koberda JL, Bienkiewicz A, Koberda I, Koberda P, Moses A, Tomescu M, Rihs T, Britz J, Custo A, Grouiller F, Schneider M, Debbané M, Eliez S, Michel C, Wang GY, Kydd R, Wouldes TA, Jensen M, Russell BR, Dissanayaka N, Au T, Angwin A, O'Sullivan J, Byrne G, Silburn P, Marsh R, Mellic G, Copland D, Bänninger A, Kottlow M, Díaz Hernàndez L, Koenig T, Díaz Hernàndez L, Bänninger A, Koenig T, Hauser TU, Iannaccone R, Mathys C, Ball J, Drechsler R, Brandeis D, Walitza S, Brem S, Boeijinga PH, Pang EW, Valica T, Macdonald MJ, Oh A, Lerch JP, Anagnostou E, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Verardo AR, Giannoudas I, La Porta P, Niolu C, Fernandez I, Siracusano A, Shimada T, Matsuda Y, Monkawa A, Monkawa T, Hashimoto R, Watanabe K, Kawasaki Y, Matsuda Y, Shimada T, Monkawa T, Monkawa A, Watanabe K, Kawasaki Y, Stegmayer K, Horn H, Federspiel A, Razavi N, Bracht T, Laimböck K, Strik W, Dierks T, Wiest R, Müller TJ, Walther S, Koorenhof LJ, Swithenby SJ, Martins-Mourao A, Rihs TA, Tomescu M, Song KW, Custo A, Knebel JF, Murray M, Eliez S, Michel CM, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Laimboeck K, Jann K, Walther S, Federspiel A, Wiest R, Strik W, Horn H. Abstracts of Presentations at the International Conference on Basic and Clinical Multimodal Imaging (BaCI), a Joint Conference of the International Society for Neuroimaging in Psychiatry (ISNIP), the International Society for Functional Source Imaging (ISFSI), the International Society for Bioelectromagnetism (ISBEM), the International Society for Brain Electromagnetic Topography (ISBET), and the EEG and Clinical Neuroscience Society (ECNS), in Geneva, Switzerland, September 5-8, 2013. Clin EEG Neurosci 2013; 44:1550059413507209. [PMID: 24368763 DOI: 10.1177/1550059413507209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- B J He
- National Institutes of Health, Bethesda, MD, USA
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Ratti P, Sierra-Peña M, Bastin J, Manni R, Simonetta-Moreau M, David O. Sleep enactment behaviors in Parkinson’s disease and multiple system atrophy: Beyond rem behavior disorder. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Gal-Ben-Ari S, Kenney JW, Ounalla-Saad H, Taha E, David O, Levitan D, Gildish I, Panja D, Pai B, Wibrand K, Simpson TI, Proud CG, Bramham CR, Armstrong JD, Rosenblum K. Consolidation and translation regulation. Learn Mem 2012; 19:410-22. [PMID: 22904372 PMCID: PMC3418764 DOI: 10.1101/lm.026849.112] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [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] [Indexed: 12/21/2022]
Abstract
mRNA translation, or protein synthesis, is a major component of the transformation of the genetic code into any cellular activity. This complicated, multistep process is divided into three phases: initiation, elongation, and termination. Initiation is the step at which the ribosome is recruited to the mRNA, and is regarded as the major rate-limiting step in translation, while elongation consists of the elongation of the polypeptide chain; both steps are frequent targets for regulation, which is defined as a change in the rate of translation of an mRNA per unit time. In the normal brain, control of translation is a key mechanism for regulation of memory and synaptic plasticity consolidation, i.e., the off-line processing of acquired information. These regulation processes may differ between different brain structures or neuronal populations. Moreover, dysregulation of translation leads to pathological brain function such as memory impairment. Both normal and abnormal function of the translation machinery is believed to lead to translational up-regulation or down-regulation of a subset of mRNAs. However, the identification of these newly synthesized proteins and determination of the rates of protein synthesis or degradation taking place in different neuronal types and compartments at different time points in the brain demand new proteomic methods and system biology approaches. Here, we discuss in detail the relationship between translation regulation and memory or synaptic plasticity consolidation while focusing on a model of cortical-dependent taste learning task and hippocampal-dependent plasticity. In addition, we describe a novel systems biology perspective to better describe consolidation.
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Affiliation(s)
- Shunit Gal-Ben-Ari
- Sagol Department of Neurobiology, University of Haifa, Haifa 31905, Israel
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Boyce M, David O, Darwin K, Mitchell T, Johnston A, Warrington S. Single oral doses of netazepide (YF476), a gastrin receptor antagonist, cause dose-dependent, sustained increases in gastric pH compared with placebo and ranitidine in healthy subjects. Aliment Pharmacol Ther 2012; 36:181-9. [PMID: 22607579 DOI: 10.1111/j.1365-2036.2012.05143.x] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 03/26/2012] [Accepted: 05/01/2012] [Indexed: 12/17/2022]
Abstract
BACKGROUND Nonclinical studies have shown netazepide (YF476) to be a potent, selective, competitive and orally active gastrin receptor antagonist. AIM To administer to humans for the first time single oral doses of netazepide, to assess their tolerability, safety, pharmacokinetics and effect on 24-h gastric pH. METHODS We did two randomised double-blind single-dose studies in healthy subjects. The first (n = 12) was a six-way incomplete crossover pilot study of rising doses of netazepide (range 0.5-100 mg) and placebo. The second (n = 20) was a five-way complete crossover study of netazepide 5, 25 and 100 mg, ranitidine 150 mg and placebo. In both trials we collected frequent blood samples, measured plasma netazepide and calculated pharmacokinetic parameters. In the comparative trial we measured gastric pH continuously for 24 h and compared treatments by percentage time gastric pH ≥4. RESULTS Netazepide was well tolerated. Median t (max) and t (½) for the 100 mg dose were about 1 and 7 h, respectively, and the pharmacokinetics were dose-proportional. Netazepide and ranitidine each increased gastric pH. Onset of activity was similarly rapid for both. All netazepide doses were more effective than placebo (P ≤ 0.023). Compared with ranitidine, netazepide 5 mg was as effective, and netazepide 25 and 100 mg were much more effective (P ≤ 0.010), over the 24 h after dosing. Activity of ranitidine lasted about 12 h, whereas that of netazepide exceeded 24 h. CONCLUSIONS In human: netazepide is an orally active gastrin antagonist, and gastrin has a major role in controlling gastric acidity. Repeated-dose studies are justified. NCT01538784 and NCT01538797.
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Affiliation(s)
- M Boyce
- Hammersmith Medicines Research, Central Middlesex Hospital, London, UK.
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Gildish I, Manor D, David O, Sharma V, Williams D, Agarwala U, Wang X, Kenney JW, Proud CG, Rosenblum K. Impaired associative taste learning and abnormal brain activation in kinase-defective eEF2K mice. Learn Mem 2012; 19:116-25. [PMID: 22366775 DOI: 10.1101/lm.023937.111] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Memory consolidation is defined temporally based on pharmacological interventions such as inhibitors of mRNA translation (molecular consolidation) or post-acquisition deactivation of specific brain regions (systems level consolidation). However, the relationship between molecular and systems consolidation are poorly understood. Molecular consolidation mechanisms involved in translation initiation and elongation have previously been studied in the cortex using taste-learning paradigms. For example, the levels of phosphorylation of eukaryotic elongation factor 2 (eEF2) were found to be correlated with taste learning in the gustatory cortex (GC), minutes following learning. In order to isolate the role of the eEF2 phosphorylation state at Thr-56 in both molecular and system consolidation, we analyzed cortical-dependent taste learning in eEF2K (the only known kinase for eEF2) ki mice, which exhibit reduced levels of eEF2 phosphorylation but normal levels of eEF2 and eEF2K. These mice exhibit clear attenuation of cortical-dependent associative, but not of incidental, taste learning. In order to gain a better understanding of the underlying mechanisms, we compared brain activity as measured by MEMRI (manganese-enhanced magnetic resonance imaging) between eEF2K ki mice and WT mice during conditioned taste aversion (CTA) learning and observed clear differences between the two but saw no differences under basal conditions. Our results demonstrate that adequate levels of phosphorylation of eEF2 are essential for cortical-dependent associative learning and suggest that malfunction of memory processing at the systems level underlies this associative memory impairment.
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Affiliation(s)
- Iness Gildish
- Department of Neurobiology, University of Haifa, Haifa 31905, Israel
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31
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Smith SM, Bandettini PA, Miller KL, Behrens TEJ, Friston KJ, David O, Liu T, Woolrich MW, Nichols TE. The danger of systematic bias in group-level FMRI-lag-based causality estimation. Neuroimage 2012; 59:1228-9. [PMID: 21867760 DOI: 10.1016/j.neuroimage.2011.08.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 08/06/2011] [Accepted: 08/09/2011] [Indexed: 12/01/2022] Open
Abstract
Schippers, Renken and Keysers (NeuroImage, 2011) present a simulation of multi-subject lag-based causality estimation. We fully agree that single-subject evaluations (e.g., Smith et al., 2011) need to be revisited in the context of multi-subject studies, and Schippers' paper is a good example, including detailed multi-level simulation and cross-subject statistical modelling. The authors conclude that "the average chance to find a significant Granger causality effect when no actual influence is present in the data stays well below the p-level imposed on the second level statistics" and that "when the analyses reveal a significant directed influence, this direction was accurate in the vast majority of the cases". Unfortunately, we believe that the general meaning that may be taken from these statements is not supported by the paper's results, as there may in reality be a systematic (group-average) difference in haemodynamic delay between two brain areas. While many statements in the paper (e.g., the final two sentences) do refer to this problem, we fear that the overriding message that many readers may take from the paper could cause misunderstanding.
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Affiliation(s)
- S M Smith
- Oxford Centre for Functional MRI of the Brain (FMRIB), Nuffield Department of Clinical Neurosciences, Oxford University, UK.
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Goetz L, Piallat B, Thibaudier Y, Montigon O, David O, Chabardès S. A non-human primate model of bipedal locomotion under restrained condition allowing gait studies and single unit brain recordings. J Neurosci Methods 2011; 204:306-17. [PMID: 22155386 DOI: 10.1016/j.jneumeth.2011.11.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 09/23/2011] [Accepted: 11/09/2011] [Indexed: 11/29/2022]
Abstract
For decades, several animal models of locomotion have allowed a better understanding of the basic physiological mechanisms of gait. However, unlike most of the mammals, the Order Primates is characterized by fundamental changes in locomotor behaviour. In particular, some primates use a specific pattern of locomotion and are able to naturally walk bipedally due possibly to a specific supra-spinal control of locomotion. These features must be taken into account when one considers to study the intrinsic properties of human gait. Thus, an experimental model of bipedal locomotion allowing precise and reproducible analysis of gait in non-human primate is still lacking. This study describes a non-human primate model of bipedal locomotion under restrained condition. We undertook a kinematic and biomechanic study in three Macaca fascicularis trained to walk bipedally on a treadmill. One of the primate was evaluated in complete head fixation. Gait visual analysis and electromyographic recordings provided pertinent description of the gait pattern. Step frequencies, step lengths, cycle and stance phase durations were correlated with Froude number (dimensionless velocity), whereas swing phase durations remained non-correlated. Gait patterns observed in our model were similar to those obtained in freely bipedal Macaca fuscata and to a lesser extend to Humans. Gait pattern was not modified by head fixation thereby allowing us to perform precise and repetitive micro electrode recordings of deep cerebral structures. Thus, the present model could provide a pertinent pre-clinical tool to study gait parameters and their neuronal control but also could be helpful to validate new therapeutics interventions.
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Affiliation(s)
- L Goetz
- Grenoble Institut des Neurosciences, Chemin Fortuné Ferrini, BP 170, 38042 Grenoble, France
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Chivoret N, Piallat B, David O, Chabardes S. Implication du noyau antérieur du thalamus dans un modèle de crises temporales : étude chez le primate non humain. Neurochirurgie 2011. [DOI: 10.1016/j.neuchi.2011.09.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
We present a case of a hematic cyst and review the literature in order to clarify nomenclature discrepancies regarding terms used to describe cysts containing blood and blood breakdown products in and around the orbit. We believe orbital cysts containing blood and blood breakdown products should be separated into two major categories depending on the presence or absence of an epithelial or endothelial lining. A hemorrhage into a preexisting lesion such as a dermoid, on lymphangioma, which contains blood breakdown products lined by an endothelial or epithelial lining, should be referred to as an acute or chronic hematoma in a dermoid or lymphangioma. In contrast, a hematic cyst contains blood breakdown products and has no epithelial or endothelial lining but rather a fibrous pseudocapsule.
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Amini L, Jutten C, Achard S, David O, Soltanian-Zadeh H, Hossein-Zadeh GA, Kahane P, Minotti L, Vercueil L. Directed differential connectivity graph of interictal epileptiform discharges. IEEE Trans Biomed Eng 2010; 58:884-93. [PMID: 21156385 DOI: 10.1109/tbme.2010.2099227] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In this paper, we study temporal couplings between interictal events of spatially remote regions in order to localize the leading epileptic regions from intracerebral EEG (iEEG). We aim to assess whether quantitative epileptic graph analysis during interictal period may be helpful to predict the seizure onset zone of ictal iEEG. Using wavelet transform, cross-correlation coefficient, and multiple hypothesis test, we propose a differential connectivity graph (DCG) to represent the connections that change significantly between epileptic and nonepileptic states as defined by the interictal events. Postprocessings based on mutual information and multiobjective optimization are proposed to localize the leading epileptic regions through DCG. The suggested approach is applied on iEEG recordings of five patients suffering from focal epilepsy. Quantitative comparisons of the proposed epileptic regions within ictal onset zones detected by visual inspection and using electrically stimulated seizures, reveal good performance of the present method.
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Affiliation(s)
- L Amini
- GIPSA-LAB, University of Grenoble, F-38402 Grenoble Cedex, France.
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David O, Dedonder-Lardeux C, Jouvet C. Is there an Excited State Proton Transfer in phenol (or 1 -naphthol)-ammonia clusters? Hydrogen Detachment and Transfer to Solvent: A key for non-radiative processes in clusters. INT REV PHYS CHEM 2010. [DOI: 10.1080/01442350210164287] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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David O, Ojugbana CC, Onyewelehi E, Eseanobi A. Investigating effectiveness of speed cameras in developing communities the Nigerian perspective. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.431] [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: 11/04/2022]
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Olebunne K, David O, Maxwell A, Ojugbana C. Enhancing emergency response services in a developing country through community efforts. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ojugbana CC, David O, Ikediashi IG, Christopher O. Indiscriminate use of siren in non emergency situations on African roads. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.427] [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: 11/04/2022]
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David O, Ojugbana CC, Obinna K, Ifeanyi A. Addressing the inadequacies of Nigeria's national vehicle visibility scheme for enhanced safety. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Guillemaud R, Bêche JF, Billoint O, Bonnet S, Gharbi S, Rostaing JP, Trévisiol M, Yvert B, Rousseau L, Goy F, Heuschkel M, David O, Saillet S, Charvet G. A Multi-channel platform for recording and stimulation of large neuronal structures. Ing Rech Biomed 2009. [DOI: 10.1016/j.irbm.2009.10.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Krainik A, Moreaud O, Troprès I, Chipon E, Jiang Z, David O, Villien M, Warnkin J, Mémin A, Segebarth C, Le Bas J. P2a-9 IRM de la vasoréactivité cérébrale dans la maladie d’Alzheimer : Résultats préliminaires. Rev Neurol (Paris) 2009. [DOI: 10.1016/s0035-3787(09)72637-2] [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: 10/20/2022]
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David O, Grillo A, Ceoloni B, Cavallo F, Podda G, Biancotti PP, Bergamo D, Canavese C. Analysis of red cell parameters on the Sysmex XE 2100 and ADVIA 120 in iron deficiency and in uraemic chronic disease. Scandinavian Journal of Clinical and Laboratory Investigation 2009; 66:113-20. [PMID: 16537244 DOI: 10.1080/00365510500406910] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The percentage measurement of hypochromic red cells (HYPO) and reticulocyte haemoglobin content (CHr) using the ADVIA system has recently been validated as a useful tool in indicating iron deficiency, also in cases of chronic diseases such as renal failure. The aim of this study was to evaluate the extent to which the red cell parameters, RBC-Y and RET-Y, provided by Sysmex XE 2100, correlate with HYPO and CHr. MATERIAL AND METHODS The laboratory markers of iron status were evaluated together with HYPO, CHr, RBC-Y and RET-Y in 92 healthy subjects (C), 42 iron-deficient patients (ID) and 88 uraemic patients receiving regular dialysis treatment (RDT). RESULTS In ID patients, increased HYPO and decreased RBC-Y, CHr and RET-Y values, with no overlapping with reference values, were found and a significant correlation was present between ADVIA 120 and Sysmex indices (p<0.001 for each correlation). In RDT patients, HYPO median values were increased with a wide distribution of values (95 % reference range = 0.7-27.5 % and 0.7-22.6 % in men and women, respectively). In contrast, RBC-Y was normal/increased (95 % reference range = 169.4-191.1 and 168.7-190.5 in men and women, respectively), even though there was a significant correlation between them (p<0.001). CHr and RET-Y values were within the reference range; moreover, in these patients mean cell volume of red cells and of reticulocytes (MCV and MCVr) median values were increased. CONCLUSIONS This study confirmed the validity of RBC-Y in the management of ID, but not in RDT, where the diagnostic power of RBC-Y as an index of cell hypochromia is limited owing to high MCV values.
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Affiliation(s)
- O David
- Department of Clinical Pathology, Regina Margherita-S. Anna Hospital, Turin, Italy.
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Gagarina-Sasia T, David O, Dubus G, Gabellini E, Nozais F, Perrot Y, Pretot P, Riwan A, Zanardo N. Remote handling dynamical modelling: Assessment of a new approach to enhance positioning accuracy with heavy load manipulation. Fusion Engineering and Design 2008. [DOI: 10.1016/j.fusengdes.2008.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Lee N, Smolarz AJ, Olson S, David O, Reiser J, Kutner R, Daw NC, Prockop DJ, Horwitz EM, Gregory CA. A potential role for Dkk-1 in the pathogenesis of osteosarcoma predicts novel diagnostic and treatment strategies. Br J Cancer 2007; 97:1552-9. [PMID: 17987039 PMCID: PMC2360262 DOI: 10.1038/sj.bjc.6604069] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [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] [Indexed: 12/17/2022] Open
Abstract
Canonical Wnt signalling is an osteoinductive signal that promotes bone repair through acceleration of osteogenic differentiation by progenitors. Dkk-1 is a secreted inhibitor of canonical Wnt signalling and thus inhibits osteogenesis. To examine a potential osteoinhibitory role of Dkk-1 in osteosarcoma (OS), we measured serum Dkk-1 in paediatric patients with OS (median age, 13.4 years) and found it to be significantly elevated. We also found that Dkk-1 was maximally expressed by the OS cells at the tumour periphery and in vitro, Dkk-1 and RANKL are coexpressed by rapidly proliferating OS cells. Both Dkk-1 and conditioned media from OS cells reduce osteogenesis by human mesenchymal cells and by immunodepletion of Dkk-1, or by adding a GSK3β inhibitor, the effects of Dkk-1 were attenuated. In mice, we found that the expression of Dkk-1 from implanted tumours was similar to the human tumour biopsies in that human Dkk-1 was present in the serum of recipient animals. These data demonstrate that systemic levels of Dkk-1 are elevated in OS. Furthermore, the expression of Dkk-1 by the OS cells at the periphery of the tumour probably contributes to its expansion by inhibiting repair of the surrounding bone. These data demonstrate that Dkk-1 may serve as a prognostic or diagnostic marker for evaluation of OS and furthermore, immunodepletion of Dkk-1 or administration of GSK3β inhibitors could represent an adjunct therapy for this disease.
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Affiliation(s)
- N Lee
- Department of Medicine, Center for Gene Therapy, Tulane University Health Sciences Center, 1430 Tulane Avenue, New Orleans, LA 70112, USA
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Cordier J, Bayetti P, Hemsworth R, David O, Friconneau J. Guidelines for remote handling maintenance of ITER neutral beam line components: Proposal of an alternate supporting system. Fusion Engineering and Design 2007. [DOI: 10.1016/j.fusengdes.2007.05.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Krainik A, David O, Chipon E, Tropes I, Warnking J, Segebarth C, Le Bas JF. La vasoréactivité péritumorale est inversée en présence d'une rupture isolée de la barrière hématoencéphalique: à propos de deux cas. J Neuroradiol 2007. [DOI: 10.1016/j.neurad.2007.01.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Krainik A, Rubin C, Grand S, David O, Baciu M, Jaillard A, Troprès I, Lamalle L, Duffau H, Le Bas JF, Segebarth C, Lehéricy S. L’imagerie par résonance magnétique cérébrale fonctionnelle en pratique clinique. ACTA ACUST UNITED AC 2006; 87:607-17. [PMID: 16788535 DOI: 10.1016/s0221-0363(06)74054-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In the last decade, functional MRI (fMRI) has become one of the most widely used functional imaging technique in neurosciences. However, its clinical applications remain limited. Despite methodological and practical issues, fMRI data has been validated by different techniques (magnetoencephalography, Wada test, electrical and magnetic stimulations, and surgical resections). In neurosurgical practice, fMRI can identify eloquent areas involved in motor and language functions, and may evaluate characteristics of postoperative neurological deficit including its occurrence, clinical presentation and duration. This may help to inform patients and to prepare postoperative care. fMRI may also identify epileptic foci. In neurological practice, fMRI may help to determine prognosis of recovery after stroke, appropriate medication, and rehabilitation. fMRI may help to identify patients at risk of developing Alzheimer disease. Finally, cerebrovascular reactivity imaging is an interesting approach that might provide new radiological insights of vascular function.
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Affiliation(s)
- A Krainik
- Service de Neuroradiologie - Unité IRM, CHU Grenoble.
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Friconneau J, David O, Martins J, Palmer J, Tesini A. Assessment of a cooperative maintenance scheme for ITER divertor cooling pipes. Fusion Engineering and Design 2005. [DOI: 10.1016/j.fusengdes.2005.06.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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