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Wurtz LI, Knyazhanskaya E, Sohaei D, Prassas I, Pittock S, Willrich MAV, Saadeh R, Gupta R, Atkinson HJ, Grill D, Stengelin M, Thebault S, Freedman MS, Diamandis EP, Scarisbrick IA. Identification of brain-enriched proteins in CSF as biomarkers of relapsing remitting multiple sclerosis. Clin Proteomics 2024; 21:42. [PMID: 38880880 PMCID: PMC11181608 DOI: 10.1186/s12014-024-09494-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 06/05/2024] [Indexed: 06/18/2024] Open
Abstract
BACKGROUND Multiple sclerosis (MS) is a clinically and biologically heterogenous disease with currently unpredictable progression and relapse. After the development and success of neurofilament as a cerebrospinal fluid (CSF) biomarker, there is reinvigorated interest in identifying other markers of or contributors to disease. The objective of this study is to probe the predictive potential of a panel of brain-enriched proteins on MS disease progression and subtype. METHODS This study includes 40 individuals with MS and 14 headache controls. The MS cohort consists of 20 relapsing remitting (RR) and 20 primary progressive (PP) patients. The CSF of all individuals was analyzed for 63 brain enriched proteins using a method of liquid-chromatography tandem mass spectrometry. Wilcoxon rank sum test, Kruskal-Wallis one-way ANOVA, logistic regression, and Pearson correlation were used to refine the list of candidates by comparing relative protein concentrations as well as relation to known imaging and molecular biomarkers. RESULTS We report 30 proteins with some relevance to disease, clinical subtype, or severity. Strikingly, we observed widespread protein depletion in the disease CSF as compared to control. We identified numerous markers of relapsing disease, including KLK6 (kallikrein 6, OR = 0.367, p < 0.05), which may be driven by active disease as defined by MRI enhancing lesions. Other oligodendrocyte-enriched proteins also appeared at reduced levels in relapsing disease, namely CNDP1 (carnosine dipeptidase 1), LINGO1 (leucine rich repeat and Immunoglobin-like domain-containing protein 1), MAG (myelin associated glycoprotein), and MOG (myelin oligodendrocyte glycoprotein). Finally, we identified three proteins-CNDP1, APLP1 (amyloid beta precursor like protein 1), and OLFM1 (olfactomedin 1)-that were statistically different in relapsing vs. progressive disease raising the potential for use as an early biomarker to discriminate clinical subtype. CONCLUSIONS We illustrate the utility of targeted mass spectrometry in generating potential targets for future biomarker studies and highlight reductions in brain-enriched proteins as markers of the relapsing remitting disease stage.
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Affiliation(s)
- Lincoln I Wurtz
- Medical Scientist Training Program, Mayo Clinic, Rochester, MN, USA
- Mayo Clinic Alix School of Medicine, Mayo Clinic, Rochester, MN, USA
| | | | - Dorsa Sohaei
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Ioannis Prassas
- Mount Sinai Hospital, Toronto, Canada
- Laboratory Medicine Program, University Health Network, Toronto, Canada
| | - Sean Pittock
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
- Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN, USA
| | | | - Ruba Saadeh
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Ruchi Gupta
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
| | - Hunter J Atkinson
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
| | - Diane Grill
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
| | | | - Simon Thebault
- Department of Medicine and The Ottawa Research Institute, Ottawa, Canada
- Division of Multiple Sclerosis, Department of Neurology, The University of Pennsylvania, Philadelphia, USA
| | - Mark S Freedman
- Department of Medicine and The Ottawa Research Institute, Ottawa, Canada
| | | | - Isobel A Scarisbrick
- Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN, USA.
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN, 55905, USA.
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2
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Xu F, Chen A, Pan S, Wu Y, He H, Han Z, Lu L, Orgil B, Chi X, Yang C, Jia S, Yu C, Mi J. Systems genetics analysis reveals the common genetic basis for pain sensitivity and cognitive function. CNS Neurosci Ther 2024; 30:e14557. [PMID: 38421132 PMCID: PMC10850811 DOI: 10.1111/cns.14557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/31/2023] [Accepted: 11/25/2023] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND There is growing evidence of a strong correlation between pain sensitivity and cognitive function under both physiological and pathological conditions. However, the detailed mechanisms remain largely unknown. In the current study, we sought to explore candidate genes and common molecular mechanisms underlying pain sensitivity and cognitive function with a transcriptome-wide association study using recombinant inbred mice from the BXD family. METHODS The pain sensitivity determined by Hargreaves' paw withdrawal test and cognition-related phenotypes were systematically analyzed in 60 strains of BXD mice and correlated with hippocampus transcriptomes, followed by quantitative trait locus (QTL) mapping and systems genetics analysis. RESULTS The pain sensitivity showed significant variability across the BXD strains and co-varies with cognitive traits. Pain sensitivity correlated hippocampual genes showed a significant involvement in cognition-related pathways, including glutamatergic synapse, and PI3K-Akt signaling pathway. Moreover, QTL mapping identified a genomic region on chromosome 4, potentially regulating the variation of pain sensitivity. Integrative analysis of expression QTL mapping, correlation analysis, and Bayesian network modeling identified Ring finger protein 20 (Rnf20) as the best candidate. Further pathway analysis indicated that Rnf20 may regulate the expression of pain sensitivity and cognitive function through the PI3K-Akt signaling pathway, particularly through interactions with genes Ppp2r2b, Ppp2r5c, Col9a3, Met, Rps6, Tnc, and Kras. CONCLUSIONS Our study demonstrated that pain sensitivity is associated with genetic background and Rnf20-mediated PI3K-Akt signaling may involve in the regulation of pain sensitivity and cognitive functions.
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Affiliation(s)
- Fuyi Xu
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Anran Chen
- The Affiliated Yantai Yuhuangding Hospital of Qingdao UniversityYantaiChina
| | - Shuijing Pan
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Yingying Wu
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Hongjie He
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Zhe Han
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Lu Lu
- University of Tennessee Health Science CenterMemphisTennesseeUSA
| | | | - XiaoDong Chi
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Cunhua Yang
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
| | - Shushan Jia
- Department of AnesthesiologyYanTai Affiliated Hospital of BinZhou Medical UniversityYantaiChina
| | - Cuicui Yu
- The Affiliated Yantai Yuhuangding Hospital of Qingdao UniversityYantaiChina
| | - Jia Mi
- Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and TreatmentBinzhou Medical UniversityYantaiChina
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3
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Mir A, Amer F, Ali M, Alotaibi W, Alotaibi M, Hedaithy A, Aldurayhim F, Hussain F, Bashir S, Housawi Y. Continuous Spikes and Waves During Sleep (CSWS), Severe Epileptic Encephalopathy, and Choreoathetosis due to Mutations in FRRS1L. Clin EEG Neurosci 2023; 54:526-533. [PMID: 35815844 DOI: 10.1177/15500594221112508] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background. Biallelic pathogenic variants in the FRRS1L gene are now known to cause developmental and epileptic encephalopathy-37 (DEE37). It can also be associated with chorea and continuous spikes and waves during sleep (CSWS). CSWS is a rare age-related epileptic encephalopathy syndrome of childhood that is characterized by seizures, neurocognitive regression and electrical status epilepticus during sleep (ESES) on electroencephalogram (EEG) that evolves in four stages. Seizures start during the prodromal phase but the ESES on EEG appears only during acute stage and this is the stage when the diagnosis of CSWS can be made. Methods. We present two patients with FRRS1L mutation causing DEE37 with CSWS. We also review twenty-nine cases of DEE37 described in the literature before and discuss its association with CSWS in the total cohort of thirty-one cases. Results. Developmental regression was found in 80% of the patients, mean age of seizure onset was 18 months, ESES or slow spike and wave on the EEG were reported mostly in the older patients (median age of 11 years) and hypsarrhythmia was reported in younger patients (median age of 4 years). This could suggest that if the younger patients were followed longer their EEG would have evolved into ESES during the acute stage of this syndrome and a diagnosis of CSWS could be made. Conclusion. Recognizing ESES and the natural evolution of CSWS is important in diagnosis and proper management of these patients. More detailed report of EEG findings and the evolution of epilepsy and development are needed to further characterize this syndrome.
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Affiliation(s)
- Ali Mir
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Fawzia Amer
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
- Department of Pediatric Neurology and metabolic, Cairo University Children Hospital, Cairo, Egypt
| | - Mona Ali
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Wajd Alotaibi
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Manar Alotaibi
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Abdullah Hedaithy
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Fatimah Aldurayhim
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Fatimah Hussain
- Department of Pediatric Neurology, King Fahad Specialist Hospital, Dammam, KSA
| | - Shahid Bashir
- Neuroscience Center, King Fahad Specialist Hospital, Dammam, KSA
| | - Yousef Housawi
- Genetic and Metabolic Department, King Fahad Specialist Hospital, Dammam, KSA
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Sohaei D, Thebault S, Avery LM, Batruch I, Lam B, Xu W, Saadeh RS, Scarisbrick IA, Diamandis EP, Prassas I, Freedman MS. Cerebrospinal fluid camk2a levels at baseline predict long-term progression in multiple sclerosis. Clin Proteomics 2023; 20:33. [PMID: 37644477 PMCID: PMC10466840 DOI: 10.1186/s12014-023-09418-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 06/28/2023] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Multiple sclerosis (MS) remains a highly unpredictable disease. Many hope that fluid biomarkers may contribute to better stratification of disease, aiding the personalisation of treatment decisions, ultimately improving patient outcomes. OBJECTIVE The objective of this study was to evaluate the predictive value of CSF brain-specific proteins from early in the disease course of MS on long term clinical outcomes. METHODS In this study, 34 MS patients had their CSF collected and stored within 5 years of disease onset and were then followed clinically for at least 15 years. CSF concentrations of 64 brain-specific proteins were analyzed in the 34 patient CSF, as well as 19 age and sex-matched controls, using a targeted liquid-chromatography tandem mass spectrometry approach. RESULTS We identified six CSF brain-specific proteins that significantly differentiated MS from controls (p < 0.05) and nine proteins that could predict disease course over the next decade. CAMK2A emerged as a biomarker candidate that could discriminate between MS and controls and could predict long-term disease progression. CONCLUSION Targeted approaches to identify and quantify biomarkers associated with MS in the CSF may inform on long term MS outcomes. CAMK2A may be one of several candidates, warranting further exploration.
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Affiliation(s)
- Dorsa Sohaei
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Simon Thebault
- Department of Medicine, The Ottawa Hospital, 01 Smyth Road, Box 601, Ottawa, ON, K1H 8L6, Canada
- The Ottawa Hospital Research Institute, Ottawa, Canada
| | - Lisa M Avery
- Biostatistics Division, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
- Department of Biostatistics, The Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada
| | - Ihor Batruch
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada
| | - Brian Lam
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, United States of America
| | - Wei Xu
- Biostatistics Division, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
- Department of Biostatistics, The Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada
| | - Rubah S Saadeh
- Department of Physical Medicine and Rehabilitation, Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Isobel A Scarisbrick
- Department of Physical Medicine and Rehabilitation, Center for Multiple Sclerosis and Autoimmune Neurology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Eleftherios P Diamandis
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
- Lunenfeld-Tanenbaum Medicine and Pathobiology, University of Toronto, Toronto, Canada
- Department of Clinical Biochemistry, University Health Network, Toronto, Canada
| | - Ioannis Prassas
- Mount Sinai Hospital, Joseph & Wolf Lebovic Ctr, 60 Murray St [Box 32]; Flr 6 - Rm L6-201, Toronto, ON, M5T 3L9, Canada.
- Laboratory Medicine Program, University Health Network, Toronto, Canada.
| | - Mark S Freedman
- Department of Medicine, The Ottawa Hospital, 01 Smyth Road, Box 601, Ottawa, ON, K1H 8L6, Canada.
- The Ottawa Hospital Research Institute, Ottawa, Canada.
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5
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Iborra-Lázaro G, Djebari S, Sánchez-Rodríguez I, Gratacòs-Batlle E, Sánchez-Fernández N, Radošević M, Casals N, Navarro-López JDD, Soto Del Cerro D, Jiménez-Díaz L. CPT1C is required for synaptic plasticity and oscillatory activity that supports motor, associative and non-associative learning. J Physiol 2023; 601:3533-3556. [PMID: 37309891 DOI: 10.1113/jp284248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 05/26/2023] [Indexed: 06/14/2023] Open
Abstract
Carnitine palmitoyltransferase 1c (CPT1C) is a neuron-specific protein widely distributed throughout the CNS and highly expressed in discrete brain areas including the hypothalamus, hippocampus, amygdala and different motor regions. Its deficiency has recently been shown to disrupt dendritic spine maturation and AMPA receptor synthesis and trafficking in the hippocampus, but its contribution to synaptic plasticity and cognitive learning and memory processes remains mostly unknown. Here, we aimed to explore the molecular, synaptic, neural network and behavioural role of CPT1C in cognition-related functions by using CPT1C knockout (KO) mice. CPT1C-deficient mice showed extensive learning and memory deficits. The CPT1C KO animals exhibited impaired motor and instrumental learning that seemed to be related, in part, to locomotor deficits and muscle weakness but not to mood alterations. In addition, CPT1C KO mice showed detrimental hippocampus-dependent spatial and habituation memory, most probably attributable to inefficient dendritic spine maturation, impairments in long-term plasticity at the CA3-CA1 synapse and aberrant cortical oscillatory activity. In conclusion, our results reveal that CPT1C is not only crucial for motor function, coordination and energy homeostasis, but also has a crucial role in the maintenance of learning and memory cognitive functions. KEY POINTS: CPT1C, a neuron-specific interactor protein involved in AMPA receptor synthesis and trafficking, was found to be highly expressed in the hippocampus, amygdala and various motor regions. CPT1C-deficient animals exhibited energy deficits and impaired locomotion, but no mood changes were found. CPT1C deficiency disrupts hippocampal dendritic spine maturation and long-term synaptic plasticity and reduces cortical γ oscillations. CPT1C was found to be crucial for motor, associative and non-associative learning and memory.
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Affiliation(s)
- Guillermo Iborra-Lázaro
- Neurophysiology & Behaviour Laboratory, Regional Centre for Biomedical Research (CRIB), Faculty of Medicine of Ciudad Real, University of Castilla-La Mancha, Ciudad Real, Spain
| | - Souhail Djebari
- Neurophysiology & Behaviour Laboratory, Regional Centre for Biomedical Research (CRIB), Faculty of Medicine of Ciudad Real, University of Castilla-La Mancha, Ciudad Real, Spain
| | - Irene Sánchez-Rodríguez
- Neurophysiology & Behaviour Laboratory, Regional Centre for Biomedical Research (CRIB), Faculty of Medicine of Ciudad Real, University of Castilla-La Mancha, Ciudad Real, Spain
| | - Esther Gratacòs-Batlle
- Laboratory of Neurophysiology, Department of Biomedicine, Faculty of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Barcelona, Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Nuria Sánchez-Fernández
- Laboratory of Neurophysiology, Department of Biomedicine, Faculty of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Barcelona, Spain
| | - Marija Radošević
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Núria Casals
- Basic Sciences Department, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya and Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Barcelona, Spain
| | - Juan de Dios Navarro-López
- Neurophysiology & Behaviour Laboratory, Regional Centre for Biomedical Research (CRIB), Faculty of Medicine of Ciudad Real, University of Castilla-La Mancha, Ciudad Real, Spain
| | - David Soto Del Cerro
- Laboratory of Neurophysiology, Department of Biomedicine, Faculty of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Barcelona, Spain
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
| | - Lydia Jiménez-Díaz
- Neurophysiology & Behaviour Laboratory, Regional Centre for Biomedical Research (CRIB), Faculty of Medicine of Ciudad Real, University of Castilla-La Mancha, Ciudad Real, Spain
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6
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Spagnoli C, Fusco C, Pisani F. Pediatric-Onset Epilepsy and Developmental Epileptic Encephalopathies Followed by Early-Onset Parkinsonism. Int J Mol Sci 2023; 24:ijms24043796. [PMID: 36835207 PMCID: PMC9965035 DOI: 10.3390/ijms24043796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Genetic early-onset Parkinsonism is unique due to frequent co-occurrence of hyperkinetic movement disorder(s) (MD), or additional neurological of systemic findings, including epilepsy in up to 10-15% of cases. Based on both the classification of Parkinsonism in children proposed by Leuzzi and coworkers and the 2017 ILAE epilepsies classification, we performed a literature review in PubMed. A few discrete presentations can be identified: Parkinsonism as a late manifestation of complex neurodevelopmental disorders, characterized by developmental and epileptic encephalopathies (DE-EE), with multiple, refractory seizure types and severely abnormal EEG characteristics, with or without preceding hyperkinetic MD; Parkinsonism in the context of syndromic conditions with unspecific reduced seizure threshold in infancy and childhood; neurodegenerative conditions with brain iron accumulation, in which childhood DE-EE is followed by neurodegeneration; and finally, monogenic juvenile Parkinsonism, in which a subset of patients with intellectual disability or developmental delay (ID/DD) develop hypokinetic MD between 10 and 30 years of age, following unspecific, usually well-controlled, childhood epilepsy. This emerging group of genetic conditions leading to epilepsy or DE-EE in childhood followed by juvenile Parkinsonism highlights the need for careful long-term follow-up, especially in the context of ID/DD, in order to readily identify individuals at increased risk of later Parkinsonism.
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Affiliation(s)
- Carlotta Spagnoli
- Child Neurology and Psychiatry Unit, Department of Pediatrics, Presidio Ospedaliero Santa Maria Nuova, AUSL-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy
- Correspondence: ; Tel.: +39-0522-296033
| | - Carlo Fusco
- Child Neurology and Psychiatry Unit, Department of Pediatrics, Presidio Ospedaliero Santa Maria Nuova, AUSL-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy
| | - Francesco Pisani
- Human Neurosciences Department, Sapienza University of Rome, 00185 Rome, Italy
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7
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Dave N, Judd JM, Decker A, Winslow W, Sarette P, Villarreal Espinosa O, Tallino S, Bartholomew SK, Bilal A, Sandler J, McDonough I, Winstone JK, Blackwood EA, Glembotski C, Karr T, Velazquez R. Dietary choline intake is necessary to prevent systems-wide organ pathology and reduce Alzheimer's disease hallmarks. Aging Cell 2023; 22:e13775. [PMID: 36642814 PMCID: PMC9924938 DOI: 10.1111/acel.13775] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 01/17/2023] Open
Abstract
There is an urgent need to identify modifiable environmental risk factors that reduce the incidence of Alzheimer's disease (AD). The B-like vitamin choline plays key roles in body- and brain-related functions. Choline produced endogenously by the phosphatidylethanolamine N-methyltransferase protein in the liver is not sufficient for adequate physiological functions, necessitating daily dietary intake. ~90% of Americans do not reach the recommended daily intake of dietary choline. Thus, it's imperative to determine whether dietary choline deficiency increases disease outcomes. Here, we placed 3xTg-AD, a model of AD, and non-transgenic (NonTg) control mice on either a standard laboratory diet with sufficient choline (ChN; 2.0 g/kg choline bitartrate) or a choline-deficient diet (Ch-; 0.0 g/kg choline bitartrate) from 3 to 12 (early to late adulthood) months of age. A Ch- diet reduced blood plasma choline levels, increased weight, and impaired both motor function and glucose metabolism in NonTg mice, with 3xTg-AD mice showing greater deficits. Tissue analyses showed cardiac and liver pathology, elevated soluble and insoluble Amyloid-β and Thioflavin S structures, and tau hyperphosphorylation at various pathological epitopes in the hippocampus and cortex of 3xTg-AD Ch- mice. To gain mechanistic insight, we performed unbiased proteomics of hippocampal and blood plasma samples. Dietary choline deficiency altered hippocampal networks associated with microtubule function and postsynaptic membrane regulation. In plasma, dietary choline deficiency altered protein networks associated with insulin metabolism, mitochondrial function, inflammation, and fructose metabolic processing. Our data highlight that dietary choline intake is necessary to prevent systems-wide organ pathology and reduce hallmark AD pathologies.
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Affiliation(s)
- Nikhil Dave
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Jessica M. Judd
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA,Arizona Alzheimer's ConsortiumPhoenixArizonaUSA
| | - Annika Decker
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Wendy Winslow
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Patrick Sarette
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Oscar Villarreal Espinosa
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Savannah Tallino
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA,Arizona Alzheimer's ConsortiumPhoenixArizonaUSA,School of Life SciencesArizona State UniversityTempeArizonaUSA
| | - Samantha K. Bartholomew
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA,Arizona Alzheimer's ConsortiumPhoenixArizonaUSA,School of Life SciencesArizona State UniversityTempeArizonaUSA
| | - Alina Bilal
- Translational Cardiovascular Research Center and Department of Internal MedicineUniversity of Arizona College of MedicinePhoenixArizonaUSA
| | - Jessica Sandler
- Biosciences Mass Spectrometry Facility, Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Ian McDonough
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Joanna K. Winstone
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA,Arizona Alzheimer's ConsortiumPhoenixArizonaUSA,School of Life SciencesArizona State UniversityTempeArizonaUSA
| | - Erik A. Blackwood
- Translational Cardiovascular Research Center and Department of Internal MedicineUniversity of Arizona College of MedicinePhoenixArizonaUSA
| | - Christopher Glembotski
- Translational Cardiovascular Research Center and Department of Internal MedicineUniversity of Arizona College of MedicinePhoenixArizonaUSA
| | - Timothy Karr
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA,Biosciences Mass Spectrometry Facility, Biodesign InstituteArizona State UniversityTempeArizonaUSA
| | - Ramon Velazquez
- Arizona State University‐Banner Neurodegenerative Disease Research Center at the Biodesign InstituteArizona State UniversityTempeArizonaUSA,Arizona Alzheimer's ConsortiumPhoenixArizonaUSA,School of Life SciencesArizona State UniversityTempeArizonaUSA
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Xu G, Li T, Huang Y. The Effects of Intraoperative Hypothermia on Postoperative Cognitive Function in the Rat Hippocampus and Its Possible Mechanisms. Brain Sci 2022; 12:brainsci12010096. [PMID: 35053838 PMCID: PMC8773779 DOI: 10.3390/brainsci12010096] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/07/2022] [Accepted: 01/08/2022] [Indexed: 02/07/2023] Open
Abstract
Intraoperative hypothermia is a common complication during operations and is associated with several adverse events. Postoperative cognitive dysfunction (POCD) and its adverse consequences have drawn increasing attention in recent years. There are currently no relevant studies investigating the correlation between intraoperative hypothermia and POCD. The aim of this study was to assess the effects of intraoperative hypothermia on postoperative cognitive function in rats undergoing exploratory laparotomies and to investigate the possible related mechanisms. We used the Y-maze and Morris Water Maze (MWM) tests to assess the rats’ postoperative spatial working memory, spatial learning, and memory. The morphological changes in hippocampal neurons were examined by haematoxylin-eosin (HE) staining and hippocampal synaptic plasticity-related protein expression. Activity-regulated cytoskeletal-associated protein (Arc), cyclic adenosine monophosphate-response element-binding protein (CREB), S133-phosphorylated CREB (p-CREB [S133]), α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor 1 (AMPAR1), and S831-phosphorylated AMPAR1 (p-AMPAR1 [S831]) were evaluated by Western blotting. Our results suggest a correlation between intraoperative hypothermia and POCD in rats and that intraoperative hypothermia may lead to POCD regarding impairments in spatial working memory, spatial learning, and memory. POCD induced by intraoperative hypothermia might be due to hippocampal neurons damage and decreased expression of synaptic plasticity-related proteins Arc, p-CREB (S133), and p-AMPAR1 (S831).
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9
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Hadi DA, Mohamed AR, Rethanavelu K, Khoo TB. Clonic seizures, continuous spikes-and-waves during slow sleep, choreoathetosis and response to sulthiame in a child with FRRS1L encephalopathy. Brain Dev 2022; 44:44-49. [PMID: 34483011 DOI: 10.1016/j.braindev.2021.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 08/03/2021] [Accepted: 08/18/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Ferric chelate reductase 1 like (FRRS1L) encephalopathy is a rare cause of developmental and epileptic encephalopathy. Only a few cases have been reported thus far and seizures tend to be drug refractory. We report an additional case to highlight the good seizure response to sulthiame. CASE REPORT A boy from non-consanguineous parents presented with history of 'abnormal movements' from 7 months of age. At one year of age, video electroencephalogram (EEG) monitoring demonstrated the 'abnormal movements' to be clonic seizures. Valproate, lamotrigine and clobazam combination were only partially effective at reducing the seizures. Repeat EEG at 1 year 8 months old revealed a continuous spikes-and-waves during slow sleep (CSWS) pattern, prompting a trial of sulthiame. After 2 weeks of sulthiame, seizures ceased completely. The clonic seizures recurred at age 4 years when sulthiame supply was interrupted, but the seizures promptly remitted following sulthiame's resumption. Subtle choreiform movements appeared from age one year and later became more prominent. Whole exome sequencing (WES) identified a homozygous novel variant (nonsense) in the FRRS1L gene (NM_014334.3: c.670C>T:p.Gln224*). He has been seizure free since 4 years of age but remained profoundly delayed. CONCLUSION Sulthiame may have a role in the early treatment of seizures in children with refractory epilepsy due to FRRS1L mutation.
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Affiliation(s)
- Dianah A Hadi
- Paediatric Neurology Unit, Hospital Tunku Azizah Kuala Lumpur, Malaysia.
| | - Ahmad R Mohamed
- Paediatric Neurology Unit, Hospital Tunku Azizah Kuala Lumpur, Malaysia
| | | | - Teik Beng Khoo
- Paediatric Neurology Unit, Hospital Tunku Azizah Kuala Lumpur, Malaysia
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10
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Devoy A, Price G, De Giorgio F, Bunton-Stasyshyn R, Thompson D, Gasco S, Allan A, Codner GF, Nair RR, Tibbit C, McLeod R, Ali Z, Noda J, Marrero-Gagliardi A, Brito-Armas JM, Williams C, Öztürk MM, Simon M, O'Neill E, Bryce-Smith S, Harrison J, Atkins G, Corrochano S, Stewart M, Gilthorpe JD, Teboul L, Acevedo-Arozena A, Fisher EM, Cunningham TJ. Generation and analysis of innovative genomically humanized knockin SOD1, TARDBP (TDP-43), and FUS mouse models. iScience 2021; 24:103463. [PMID: 34988393 PMCID: PMC8710557 DOI: 10.1016/j.isci.2021.103463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/15/2021] [Accepted: 11/12/2021] [Indexed: 12/13/2022] Open
Abstract
Amyotrophic lateral sclerosis/frontotemporal dementia (ALS/FTD) is a fatal neurodegenerative disorder, and continued innovation is needed for improved understanding and for developing therapeutics. We have created next-generation genomically humanized knockin mouse models, by replacing the mouse genomic region of Sod1, Tardbp (TDP-43), and Fus, with their human orthologs, preserving human protein biochemistry and splicing with exons and introns intact. We establish a new standard of large knockin allele quality control, demonstrating the utility of indirect capture for enrichment of a genomic region of interest followed by Oxford Nanopore sequencing. Extensive analysis shows that homozygous humanized animals only express human protein at endogenous levels. Characterization of humanized FUS animals showed that they are phenotypically normal throughout their lifespan. These humanized strains are vital for preclinical assessment of interventions and serve as templates for the addition of coding or non-coding human ALS/FTD mutations to dissect disease pathomechanisms, in a physiological context.
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Affiliation(s)
- Anny Devoy
- Department of Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Georgia Price
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Francesca De Giorgio
- Department of Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Rosie Bunton-Stasyshyn
- Department of Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - David Thompson
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Samanta Gasco
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Alasdair Allan
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Gemma F. Codner
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Remya R. Nair
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Charlotte Tibbit
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Ross McLeod
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Zeinab Ali
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Judith Noda
- Research Unit, Hospital Universitario de Canarias; ITB-ULL and CIBERNED, 38320 La Laguna, Spain
| | | | - José M. Brito-Armas
- Research Unit, Hospital Universitario de Canarias; ITB-ULL and CIBERNED, 38320 La Laguna, Spain
| | - Chloe Williams
- Department of Integrative Medical Biology, Umeå University, 901 87, Umeå, Sweden
| | - Muhammet M. Öztürk
- Department of Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Michelle Simon
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Edward O'Neill
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Sam Bryce-Smith
- Department of Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Jackie Harrison
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Gemma Atkins
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | | | - Michelle Stewart
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | | | - Lydia Teboul
- UK MRC Harwell Institute, Harwell Campus, Oxfordshire OX11 0RD, UK
| | - Abraham Acevedo-Arozena
- Research Unit, Hospital Universitario de Canarias; ITB-ULL and CIBERNED, 38320 La Laguna, Spain
| | - Elizabeth M.C. Fisher
- Department of Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
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11
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Castroflorio E, den Hoed J, Svistunova D, Finelli MJ, Cebrian-Serrano A, Corrochano S, Bassett AR, Davies B, Oliver PL. The Ncoa7 locus regulates V-ATPase formation and function, neurodevelopment and behaviour. Cell Mol Life Sci 2021; 78:3503-3524. [PMID: 33340069 PMCID: PMC8038996 DOI: 10.1007/s00018-020-03721-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 11/08/2020] [Accepted: 11/24/2020] [Indexed: 02/08/2023]
Abstract
Members of the Tre2/Bub2/Cdc16 (TBC), lysin motif (LysM), domain catalytic (TLDc) protein family are associated with multiple neurodevelopmental disorders, although their exact roles in disease remain unclear. For example, nuclear receptor coactivator 7 (NCOA7) has been associated with autism, although almost nothing is known regarding the mode-of-action of this TLDc protein in the nervous system. Here we investigated the molecular function of NCOA7 in neurons and generated a novel mouse model to determine the consequences of deleting this locus in vivo. We show that NCOA7 interacts with the cytoplasmic domain of the vacuolar (V)-ATPase in the brain and demonstrate that this protein is required for normal assembly and activity of this critical proton pump. Neurons lacking Ncoa7 exhibit altered development alongside defective lysosomal formation and function; accordingly, Ncoa7 deletion animals exhibited abnormal neuronal patterning defects and a reduced expression of lysosomal markers. Furthermore, behavioural assessment revealed anxiety and social defects in mice lacking Ncoa7. In summary, we demonstrate that NCOA7 is an important V-ATPase regulatory protein in the brain, modulating lysosomal function, neuronal connectivity and behaviour; thus our study reveals a molecular mechanism controlling endolysosomal homeostasis that is essential for neurodevelopment.
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Affiliation(s)
| | - Joery den Hoed
- Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford, OX1 3PT, UK
| | - Daria Svistunova
- Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford, OX1 3PT, UK
| | - Mattéa J Finelli
- Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford, OX1 3PT, UK
| | | | - Silvia Corrochano
- MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, UK
- Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos, Calle del Prof Martín Lagos s/n, 28040, Madrid, Spain
| | - Andrew R Bassett
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, UK
| | - Benjamin Davies
- Wellcome Centre for Human Genetics, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - Peter L Oliver
- MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, UK.
- Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford, OX1 3PT, UK.
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12
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Abdelmoumen I, Jimenez S, Valencia I, Melvin J, Legido A, Diaz-Diaz MM, Griffith C, Massingham LJ, Yelton M, Rodríguez-Hernández J, Schnur RE, Walsh LE, Cristancho AG, Bergqvist CA, McWalter K, Mathieson I, Belbin GM, Kenny EE, Ortiz-Gonzalez XR, Schneider MC. Boricua Founder Variant in FRRS1L Causes Epileptic Encephalopathy With Hyperkinetic Movements. J Child Neurol 2021; 36:93-98. [PMID: 32928027 PMCID: PMC8496110 DOI: 10.1177/0883073820953001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To describe a founder mutation effect and the clinical phenotype of homozygous FRRS1L c.737_739delGAG (p.Gly246del) variant in 15 children of Puerto Rican (Boricua) ancestry presenting with early infantile epileptic encephalopathy (EIEE-37) with prominent movement disorder. BACKGROUND EIEE-37 is caused by biallelic loss of function variants in the FRRS1L gene, which is critical for AMPA-receptor function, resulting in intractable epilepsy and dyskinesia. METHODS A retrospective, multicenter chart review of patients sharing the same homozygous FRRS1L (p.Gly246del) pathogenic variant identified by clinical genetic testing. Clinical information was collected regarding neurodevelopmental outcomes, neuroimaging, electrographic features and clinical response to antiseizure medications. RESULTS Fifteen patients from 12 different families of Puerto Rican ancestry were homozygous for the FRRS1L (p.Gly246del) pathogenic variant, with ages ranging from 1 to 25 years. The onset of seizures was from 6 to 24 months. All had hypotonia, severe global developmental delay, and most had hyperkinetic involuntary movements. Developmental regression during the first year of life was common (86%). Electroencephalogram showed hypsarrhythmia in 66% (10/15), with many older children evolving into Lennox-Gastaut syndrome. Six patients demonstrated progressive volume loss and/or cerebellar atrophy on brain magnetic resonance imaging (MRI). CONCLUSIONS We describe the largest cohort to date of patients with epileptic encephalopathy. We estimate that 0.76% of unaffected individuals of Puerto Rican ancestry carry this pathogenic variant due to a founder effect. Children homozygous for the FRRS1L (p.Gly246del) Boricua variant exhibit a very homogenous phenotype of early developmental regression and epilepsy, starting with infantile spasms and evolving into Lennox-Gastaut syndrome with hyperkinetic movement disorder.
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Affiliation(s)
- Imane Abdelmoumen
- Section of Neurology, Department of Pediatrics, St. Christopher’s Hospital for Children Drexel University College of Medicine, Philadelphia, PA, USA
| | - Sandra Jimenez
- Section of Neurology, Department of Pediatrics, St. Christopher’s Hospital for Children Drexel University College of Medicine, Philadelphia, PA, USA
| | - Ignacio Valencia
- Section of Neurology, Department of Pediatrics, St. Christopher’s Hospital for Children Drexel University College of Medicine, Philadelphia, PA, USA
| | - Joseph Melvin
- Section of Neurology, Department of Pediatrics, St. Christopher’s Hospital for Children Drexel University College of Medicine, Philadelphia, PA, USA
| | - Agustin Legido
- Section of Neurology, Department of Pediatrics, St. Christopher’s Hospital for Children Drexel University College of Medicine, Philadelphia, PA, USA
| | | | | | | | - Melissa Yelton
- Penn State Health Children’s Hospital, Clinical Genetics, Hershey, PA, USA
| | | | - Rhonda E. Schnur
- Division of Genetics, Cooper Medical School of Rowan University, Copper University Health Care, Camden, NJ, USA
| | - Laurence E. Walsh
- Indiana University School of Medicine, Neurology and Genetics, Indianapolis, IN, USA
| | - Ana G. Cristancho
- Department of Pediatrics, Division of Neurology, Epilepsy Neurogenetics Initiative, Children’s Hospital of Philadelphia, Philadelphia, PA, USA,Department of Neurology, Perelman School of Medicine University of Pennsylvania, Philadelphia, PA, USA
| | - Christina A. Bergqvist
- Department of Pediatrics, Division of Neurology, Epilepsy Neurogenetics Initiative, Children’s Hospital of Philadelphia, Philadelphia, PA, USA,Department of Neurology, Perelman School of Medicine University of Pennsylvania, Philadelphia, PA, USA
| | | | - Iain Mathieson
- Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Gillian M. Belbin
- Institute for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eimear E. Kenny
- Institute for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Xilma R. Ortiz-Gonzalez
- Department of Pediatrics, Division of Neurology, Epilepsy Neurogenetics Initiative, Children’s Hospital of Philadelphia, Philadelphia, PA, USA,Department of Neurology, Perelman School of Medicine University of Pennsylvania, Philadelphia, PA, USA
| | - Michael C. Schneider
- Section of Neurology, Department of Pediatrics, St. Christopher’s Hospital for Children Drexel University College of Medicine, Philadelphia, PA, USA
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13
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Zhang Y, Liu Y, Jia Y, Zhao Y, Ma C, Bao X, Meng X, Dou W, Wang X, Ge W. Proteomic profiling of sclerotic hippocampus revealed dysregulated packaging of vesicular neurotransmitters in temporal lobe epilepsy. Epilepsy Res 2020; 166:106412. [DOI: 10.1016/j.eplepsyres.2020.106412] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/17/2020] [Accepted: 06/30/2020] [Indexed: 12/31/2022]
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14
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Schwenk J, Fakler B. Building of AMPA‐type glutamate receptors in the endoplasmic reticulum and its implication for excitatory neurotransmission. J Physiol 2020; 599:2639-2653. [DOI: 10.1113/jp279025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 07/21/2020] [Indexed: 11/08/2022] Open
Affiliation(s)
- Jochen Schwenk
- Institute of Physiology, Faculty of Medicine University of Freiburg Hermann‐Herder‐Str. 7 Freiburg 79104 Germany
| | - Bernd Fakler
- Institute of Physiology, Faculty of Medicine University of Freiburg Hermann‐Herder‐Str. 7 Freiburg 79104 Germany
- Signalling Research Centres BIOSS and CIBSS Schänzlestr. 18 Freiburg 79104 Germany
- Center for Basics in NeuroModulation Breisacherstr. 4 Freiburg 79106 Germany
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15
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Banks GT, Guillaumin MCC, Heise I, Lau P, Yin M, Bourbia N, Aguilar C, Bowl MR, Esapa C, Brown LA, Hasan S, Tagliatti E, Nicholson E, Bains RS, Wells S, Vyazovskiy VV, Volynski K, Peirson SN, Nolan PM. Forward genetics identifies a novel sleep mutant with sleep state inertia and REM sleep deficits. SCIENCE ADVANCES 2020; 6:eabb3567. [PMID: 32851175 PMCID: PMC7423362 DOI: 10.1126/sciadv.abb3567] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 06/29/2020] [Indexed: 05/17/2023]
Abstract
Switches between global sleep and wakefulness states are believed to be dictated by top-down influences arising from subcortical nuclei. Using forward genetics and in vivo electrophysiology, we identified a recessive mouse mutant line characterized by a substantially reduced propensity to transition between wake and sleep states with an especially pronounced deficit in initiating rapid eye movement (REM) sleep episodes. The causative mutation, an Ile102Asn substitution in the synaptic vesicular protein, VAMP2, was associated with morphological synaptic changes and specific behavioral deficits, while in vitro electrophysiological investigations with fluorescence imaging revealed a markedly diminished probability of vesicular release in mutants. Our data show that global shifts in the synaptic efficiency across brain-wide networks leads to an altered probability of vigilance state transitions, possibly as a result of an altered excitability balance within local circuits controlling sleep-wake architecture.
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Affiliation(s)
- Gareth T. Banks
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Mathilde C. C. Guillaumin
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Ines Heise
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Petrina Lau
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Minghui Yin
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Nora Bourbia
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Carlos Aguilar
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Michael R. Bowl
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Chris Esapa
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Laurence A. Brown
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Sibah Hasan
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Erica Tagliatti
- UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Elizabeth Nicholson
- UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Rasneer Sonia Bains
- Mary Lyon Centre, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Sara Wells
- Mary Lyon Centre, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
| | - Vladyslav V. Vyazovskiy
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Kirill Volynski
- UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Stuart N. Peirson
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Patrick M. Nolan
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Science and Innovation Campus, Oxfordshire, UK
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Willems J, de Jong APH, Scheefhals N, Mertens E, Catsburg LAE, Poorthuis RB, de Winter F, Verhaagen J, Meye FJ, MacGillavry HD. ORANGE: A CRISPR/Cas9-based genome editing toolbox for epitope tagging of endogenous proteins in neurons. PLoS Biol 2020; 18:e3000665. [PMID: 32275651 PMCID: PMC7176289 DOI: 10.1371/journal.pbio.3000665] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 04/22/2020] [Accepted: 03/27/2020] [Indexed: 12/15/2022] Open
Abstract
The correct subcellular distribution of proteins establishes the complex morphology and function of neurons. Fluorescence microscopy techniques are invaluable to investigate subcellular protein distribution, but they suffer from the limited ability to efficiently and reliably label endogenous proteins with fluorescent probes. We developed ORANGE: Open Resource for the Application of Neuronal Genome Editing, which mediates targeted genomic integration of epitope tags in rodent dissociated neuronal culture, in organotypic slices, and in vivo. ORANGE includes a knock-in library for in-depth investigation of endogenous protein distribution, viral vectors, and a detailed two-step cloning protocol to develop knock-ins for novel targets. Using ORANGE with (live-cell) superresolution microscopy, we revealed the dynamic nanoscale organization of endogenous neurotransmitter receptors and synaptic scaffolding proteins, as well as previously uncharacterized proteins. Finally, we developed a mechanism to create multiple knock-ins in neurons, mediating multiplex imaging of endogenous proteins. Thus, ORANGE enables quantification of expression, distribution, and dynamics for virtually any protein in neurons at nanoscale resolution. This study describes the development of a genome editing toolbox (ORANGE) for endogenous tagging of proteins in neurons. This open resource allows the investigation of protein localization and dynamics in neurons using live-cell and super-resolution imaging techniques.
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Affiliation(s)
- Jelmer Willems
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, the Netherlands
| | - Arthur P. H. de Jong
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, the Netherlands
| | - Nicky Scheefhals
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, the Netherlands
| | - Eline Mertens
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, the Netherlands
| | - Lisa A. E. Catsburg
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, the Netherlands
| | - Rogier B. Poorthuis
- Department of Translational Neuroscience, UMC Utrecht Brain Center, Utrecht University, Utrecht, the Netherlands
| | - Fred de Winter
- Laboratory for Neuroregeneration, Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands
| | - Joost Verhaagen
- Laboratory for Neuroregeneration, Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands
| | - Frank J. Meye
- Department of Translational Neuroscience, UMC Utrecht Brain Center, Utrecht University, Utrecht, the Netherlands
| | - Harold D. MacGillavry
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Utrecht, the Netherlands
- * E-mail:
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17
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An ER Assembly Line of AMPA-Receptors Controls Excitatory Neurotransmission and Its Plasticity. Neuron 2019; 104:680-692.e9. [DOI: 10.1016/j.neuron.2019.08.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/28/2019] [Accepted: 08/20/2019] [Indexed: 11/15/2022]
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18
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Waugh DT. Fluoride Exposure Induces Inhibition of Sodium-and Potassium-Activated Adenosine Triphosphatase (Na +, K +-ATPase) Enzyme Activity: Molecular Mechanisms and Implications for Public Health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E1427. [PMID: 31010095 PMCID: PMC6518254 DOI: 10.3390/ijerph16081427] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/02/2019] [Accepted: 04/08/2019] [Indexed: 12/24/2022]
Abstract
In this study, several lines of evidence are provided to show that Na + , K + -ATPase activity exerts vital roles in normal brain development and function and that loss of enzyme activity is implicated in neurodevelopmental, neuropsychiatric and neurodegenerative disorders, as well as increased risk of cancer, metabolic, pulmonary and cardiovascular disease. Evidence is presented to show that fluoride (F) inhibits Na + , K + -ATPase activity by altering biological pathways through modifying the expression of genes and the activity of glycolytic enzymes, metalloenzymes, hormones, proteins, neuropeptides and cytokines, as well as biological interface interactions that rely on the bioavailability of chemical elements magnesium and manganese to modulate ATP and Na + , K + -ATPase enzyme activity. Taken together, the findings of this study provide unprecedented insights into the molecular mechanisms and biological pathways by which F inhibits Na + , K + -ATPase activity and contributes to the etiology and pathophysiology of diseases associated with impairment of this essential enzyme. Moreover, the findings of this study further suggest that there are windows of susceptibility over the life course where chronic F exposure in pregnancy and early infancy may impair Na + , K + -ATPase activity with both short- and long-term implications for disease and inequalities in health. These findings would warrant considerable attention and potential intervention, not to mention additional research on the potential effects of F intake in contributing to chronic disease.
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Affiliation(s)
- Declan Timothy Waugh
- EnviroManagement Services, 11 Riverview, Doherty's Rd, P72 YF10 Bandon, Co. Cork, Ireland.
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19
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First person – Michelle Stewart. Dis Model Mech 2019. [PMCID: PMC6398496 DOI: 10.1242/dmm.039222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
First Person is a series of interviews with the first authors of a selection of papers published in Disease Models & Mechanisms, helping early-career researchers promote themselves alongside their papers. Michelle Stewart is first author on ‘Loss of Frrs1l disrupts synaptic AMPA receptor function, and results in neurodevelopmental, motor, cognitive and electrographical abnormalities’, published in DMM. Michelle is a scientific manager in the lab of Sara Wells at MRC Harwell Institute, Oxfordshire, UK, investigating neurobehavioural genetics, behaviour and ageing in mice.
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