Trisomy Silencing By Xist Normalizes Down Syndrome Cell Pathogenesis Demonstrated For Hematopoietic Defects In Vitro, 2018 University of Massachusetts Medical School
Trisomy Silencing By Xist Normalizes Down Syndrome Cell Pathogenesis Demonstrated For Hematopoietic Defects In Vitro, Jen-Chieh Chiang, Jun Jiang, Peter E. Newburger, Jeanne B. Lawrence
Open Access Articles
We previously demonstrated that an integrated XIST transgene can broadly repress one chromosome 21 in Down syndrome (DS) pluripotent cells. Here we address whether trisomy-silencing can normalize cell function and development sufficiently to correct cell pathogenesis, tested in an in vitro model of human fetal hematopoiesis, for which DS cellular phenotypes are best known. XIST induction in four transgenic clones reproducibly corrected over-production of megakaryocytes and erythrocytes, key to DS myeloproliferative disorder and leukemia. A contrasting increase in neural stem and iPS cells shows cell-type specificity, supporting this approach successfully rebalances the hematopoietic developmental program. Given this, we next used ...
Protein Aggregates And Polyglutamine Tracts In Neurodegenerative Disease, 2018 Liberty University
Protein Aggregates And Polyglutamine Tracts In Neurodegenerative Disease, John Mack
Senior Honors Theses
The incidence of neurodegenerative diseases such as Alzheimer's Disease, Parkinson's Disease, Huntington's Disease and other Polyglutamine Diseases is projected to dramatically increase throughout the developed world, and yet the pathology of these diseases remains poorly understood. One pathway that these neurodegenerative diseases share is the accumulation of pathologic proteins which are not only harmful in their soluble form but may go on to form toxic aggregates. In many cases, a consensus has yet to be reached concerning the mechanism for protein aggregation. Therefore, the exploration of the roles of these proteins and their possible mechanisms, along with ...
The Use Of Current Steering During Subthalamic Deep Brain Stimulation To Alleviate Upper Limb Symptoms Of Parkinson's Disease, 2018 The University of Western Ontario
The Use Of Current Steering During Subthalamic Deep Brain Stimulation To Alleviate Upper Limb Symptoms Of Parkinson's Disease, Shabna Iftikar Mohideen
Electronic Thesis and Dissertation Repository
Subthalamic (STN) deep brain stimulation (DBS) is an established treatment to alleviate the appendicular motor symptoms of Parkinson's Disease (PD). Current steering during DBS allows the unequal fractionation of current between two electrodes on the lead, resulting in a non-spherical electrical field. It is hypothesized that the way the electrical field is shaped will affect a patient’s upper limb symptom alleviation. Seven PD patients who underwent bilateral STN-DBS were tested over four weeks post-operation. 16 current fractionation settings were tested each week at an amplitude that increased weekly. Optimal setting was defined as the setting that provided the ...
Who Did It?: A Review On The Possible Causes Of Multiple Sclerosis, 2018 Duquesne University
Who Did It?: A Review On The Possible Causes Of Multiple Sclerosis, Mia Difrancesco
Multiple Sclerosis (MS) is an incurable autoimmune disorder that attacks the myelin sheath surrounding nerve cells. Steady demyelination of these cells over time results in painful inflammation and reduced mobility. Genetic abnormalities could be responsible for the onset of this disease. Chromosomal mutations found in MS patients as well as environmental factors influencing the expression of certain genes will be analyzed in this review. Moreover, treatments regulating gene expression in MS patients will be discussed. Further genetic research would not only provide scientists and medical professionals with a deeper understanding of MS and other autoimmune disorders, but also lead to ...
Chd3 Helicase Domain Mutations Cause A Neurodevelopmental Syndrome With Macrocephaly And Impaired Speech And Language, 2018 Radboud University Medical Center
Chd3 Helicase Domain Mutations Cause A Neurodevelopmental Syndrome With Macrocephaly And Impaired Speech And Language, Lot Snijders Blok, Inderneel Sahai, Philippe M. Campeau
Pediatric Publications and Presentations
Chromatin remodeling is of crucial importance during brain development. Pathogenic alterations of several chromatin remodeling ATPases have been implicated in neurodevelopmental disorders. We describe an index case with a de novo missense mutation in CHD3, identified during whole genome sequencing of a cohort of children with rare speech disorders. To gain a comprehensive view of features associated with disruption of this gene, we use a genotype-driven approach, collecting and characterizing 35 individuals with de novo CHD3 mutations and overlapping phenotypes. Most mutations cluster within the ATPase/helicase domain of the encoded protein. Modeling their impact on the three-dimensional structure demonstrates ...
Cell Specific Control Of The Pallidostriatal Pathway, 2018 Illinois Mathematics and Science Academy
Cell Specific Control Of The Pallidostriatal Pathway, Shubha Verma '19
Student Publications & Research
Parkinson’s Disease is a neurodegenerative disorder of the basal ganglia. The main cause for Parkinson’s Disease is the depletion of dopamine, a neurotransmitter. The basal ganglia contains four major nuclei: the substantia nigra, the subthalamic nucleus, the external globus pallidus, and the striatum. These nuclei communicate with each other by the use of neurons.
Defective Cortex Glia Plasma Membrane Structure Underlies Light-Induced Epilepsy In Cpes Mutants, 2018 National Cancer Institute
Defective Cortex Glia Plasma Membrane Structure Underlies Light-Induced Epilepsy In Cpes Mutants, Govind Kunduri, Daniel Turner-Evans, Yutaka Konya, Yoshihiro Izumi, Kunio Nagashima, Stephen Lockett, Joost Holthuis, Takeshi Bamba, Usha Acharya, Jairaj K. Acharya
Open Access Articles
Seizures induced by visual stimulation (photosensitive epilepsy; PSE) represent a common type of epilepsy in humans, but the molecular mechanisms and genetic drivers underlying PSE remain unknown, and no good genetic animal models have been identified as yet. Here, we show an animal model of PSE, in Drosophila, owing to defective cortex glia. The cortex glial membranes are severely compromised in ceramide phosphoethanolamine synthase (cpes)-null mutants and fail to encapsulate the neuronal cell bodies in the Drosophila neuronal cortex. Expression of human sphingomyelin synthase 1, which synthesizes the closely related ceramide phosphocholine (sphingomyelin), rescues the cortex glial abnormalities and ...
Sumo-Targeted Ubiquitin Ligases (Stubls) Reduce The Toxicity And Abnormal Transcriptional Activity Associated With A Mutant, Aggregation-Prone Fragment Of Huntingtin, 2018 National Institutes of Health
Sumo-Targeted Ubiquitin Ligases (Stubls) Reduce The Toxicity And Abnormal Transcriptional Activity Associated With A Mutant, Aggregation-Prone Fragment Of Huntingtin, Kentaro Ohkuni, Nagesh Pasupala, Jennifer Peek, Grace Lauren Holloway, Gloria D. Sclar, Reuben Levy-Myers, Richard E. Baker, Munira A. Basrai, Oliver Kerscher
Open Access Articles
Cell viability and gene expression profiles are altered in cellular models of neurodegenerative disorders such as Huntington's Disease (HD). Using the yeast model system, we show that the SUMO-targeted ubiquitin ligase (STUbL) Slx5 reduces the toxicity and abnormal transcriptional activity associated with a mutant, aggregation-prone fragment of huntingtin (Htt), the causative agent of HD. We demonstrate that expression of an aggregation-prone Htt construct with 103 glutamine residues (103Q), but not the non-expanded form (25Q), results in severe growth defects in slx5Delta and slx8Delta cells. Since Slx5 is a nuclear protein and because Htt expression affects gene transcription, we assessed ...
Nuclear Localization Of Huntingtin Mrna Is Specific To Cells Of Neuronal Origin, 2018 University of Massachusetts Medical School
Nuclear Localization Of Huntingtin Mrna Is Specific To Cells Of Neuronal Origin, Marie C. Didiot, Chantal M. Ferguson, Socheata Ly, Andrew H. Coles, Abigail O. Smith, Alicia A. Bicknell, Lauren M. Hall, Ellen Sapp, Dimas Echeverria, Athma A. Pai, Marian Difiglia, Melissa J. Moore, Lawrence J. Hayward, Neil Aronin, Anastasia Khvorova
RNA Therapeutics Institute Publications
Huntington's disease (HD) is a monogenic neurodegenerative disorder representing an ideal candidate for gene silencing with oligonucleotide therapeutics (i.e., antisense oligonucleotides [ASOs] and small interfering RNAs [siRNAs]). Using an ultra-sensitive branched fluorescence in situ hybridization (FISH) method, we show that approximately 50% of wild-type HTT mRNA localizes to the nucleus and that its nuclear localization is observed only in neuronal cells. In mouse brain sections, we detect Htt mRNA predominantly in neurons, with a wide range of Htt foci observed per cell. We further show that siRNAs and ASOs efficiently eliminate cytoplasmic HTT mRNA and HTT protein, but ...
Breastfeeding History And Risk Of Stroke Among Parous Postmenopausal Women In The Women's Health Initiative, 2018 University of Kansas
Breastfeeding History And Risk Of Stroke Among Parous Postmenopausal Women In The Women's Health Initiative, Lisette T. Jacobson, Erinn M. Hade, Tracie C. Collins, Karen L. Margolis, Molly E. Waring, Linda V. Van Horn, Brian Silver, Maryam Sattari, Chloe E. Bird, Kim Kimminau, Karen Wambach, Marcia L. Stefanick
Open Access Articles
Background: Stroke is the third leading cause of death among US Hispanic and non-Hispanic black women aged 65 and older. One factor that may protect against stroke is breastfeeding. Few studies have assessed the association between breastfeeding and stroke and whether this association differs by race and ethnicity.
Methods and Results: Data were taken from the Women's Health Initiative Observational Study with follow-up through 2010; adjusted hazard ratios for stroke subsequent to childbirth were estimated with Cox regression models accounting for left and right censoring, overall and stratified by race/ethnicity. Of the 80 191 parous women in the ...
Hypermethylation Of Mir21 In Cd4+ T Cells From Patients With Relapsing-Remitting Multiple Sclerosis Associates With Lower Mirna-21 Levels And Concomitant Up-Regulation Of Its Target Genes, 2018 Karolinska Institutet, Sweden
Hypermethylation Of Mir21 In Cd4+ T Cells From Patients With Relapsing-Remitting Multiple Sclerosis Associates With Lower Mirna-21 Levels And Concomitant Up-Regulation Of Its Target Genes, Sabrina Ruhrmann, Ewoud Ewing, Eliane Piket, Lara Kular, Julio Cesar Cetrulo Lorenzi, Sunjay Jude Fernandes, Hiromasa Morikawa, Shahin Aeinehband, Sergi Sayols-Baixeras, Stella Aslibekyan, Devin M. Absher, Donna K. Arnett, Jesper Tegner, David Gomez-Cabrero, Fredrik Piehl, Maja Jagodic
Epidemiology Faculty Publications
Background: Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system caused by genetic and environmental factors. DNA methylation, an epigenetic mechanism that controls genome activity, may provide a link between genetic and environmental risk factors.
Objective: We sought to identify DNA methylation changes in CD4+ T cells in patients with relapsing-remitting (RR-MS) and secondary-progressive (SP-MS) disease and healthy controls (HC).
Methods: We performed DNA methylation analysis in CD4+ T cells from RR-MS, SP-MS, and HC and associated identified changes with the nearby risk allele, smoking, age, and gene expression.
Results: We observed significant methylation differences in ...
Rna Binding Proteins Co-Localize With Small Tau Inclusions In Tauopathy, 2018 Boston University
Rna Binding Proteins Co-Localize With Small Tau Inclusions In Tauopathy, Brandon F. Maziuk, Daniel J. Apicco, Anna Lourdes Cruz, Lulu Jiang, Peter E. A. Ash, Edroaldo Lummertz. Da Rocha, Cheng Zhang, Wai Haung Yu, John D. Leszyk, Jose F. Abisambra, Hu Li, Benjamin Wolozin
Open Access Articles
The development of insoluble, intracellular neurofibrillary tangles composed of the microtubule-associated protein tau is a defining feature of tauopathies, including Alzheimer's disease (AD). Accumulating evidence suggests that tau pathology co-localizes with RNA binding proteins (RBPs) that are known markers for stress granules (SGs). Here we used proteomics to determine how the network of tau binding proteins changes with disease in the rTg4510 mouse, and then followed up with immunohistochemistry to identify RNA binding proteins that co-localize with tau pathology. The tau interactome networks revealed striking disease-related changes in interactions between tau and a multiple RBPs, and biochemical fractionation studies ...
Changes In The Testes Following Spinal Cord Injury And The Attenuating Effects Of Licofelone, 2018 The University of Texas M D Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences
Changes In The Testes Following Spinal Cord Injury And The Attenuating Effects Of Licofelone, Ryan Fortune
UT GSBS Dissertations and Theses (Open Access)
Spinal cord injury is a devastating disease that researchers have had very limited success in treating. In addition to interrupted innervation, spinal cord injury causes pathologic changes in a multitude of organ systems. Male infertility is one such complication that is particularly devastating because the patient population is predominantly young men. Our lab has previously shown that the blood testis barrier breaks down after spinal cord injury. This dissertation shows the local metabolomic and mRNA changes that spinal cord injury causes within the testes using a Sprague Dawley rat model, including the elevation in eicosanoids, increased oxidative stress, chronically elevated ...
Predicting Gains With Visuospatial Training After Stroke Using An Eeg Measure Of Frontoparietal Circuit Function, 2018 University of California, Irvine
Predicting Gains With Visuospatial Training After Stroke Using An Eeg Measure Of Frontoparietal Circuit Function, Robert J. Zhou, Hossein M. Hondori, Maryam Khademi, Jessica M. Cassidy, Katherine M. Wu, Derek Z. Yang, Nikhita Kathuria, Fareshte R. Erani, Lucy Dodakian, Alison Mckenzie, Cristina V. Lopes, Walt Scacchi, Ramesh Srinivasan, Steven C. Cramer
Physical Therapy Faculty Articles and Research
The heterogeneity of stroke prompts the need for predictors of individual treatment response to rehabilitation therapies. We previously studied healthy subjects with EEG and identified a frontoparietal circuit in which activity predicted training-related gains in visuomotor tracking. Here we asked whether activity in this same frontoparietal circuit also predicts training-related gains in visuomotor tracking in patients with chronic hemiparetic stroke. Subjects (n = 12) underwent dense-array EEG recording at rest, then received 8 sessions of visuomotor tracking training delivered via home-based telehealth methods. Subjects showed significant training-related gains in the primary behavioral endpoint, Success Rate score on a standardized test of ...
Guidance For Switching From Off-Label Antipsychotics To Pimavanserin For Parkinson’S Disease Psychosis: An Expert Consensus, 2018 Washington University in St. Louis
Guidance For Switching From Off-Label Antipsychotics To Pimavanserin For Parkinson’S Disease Psychosis: An Expert Consensus, Kevin J. Black, Henry Nasrallah, Stuart Isaacson, Mark Stacy, Rajesh Pahwa, Charles H. Adler, Gustavo Alva, Jeffrey W. Cooney, Daniel Kremens, Matthew A. Menza, Jonathan M. Meyer, Ashwin A. Patkar, Tanya Simuni, Debbi A. Morrissette, Stephen Stahl
Kevin J. Black, MD
Loss Of Sarm1 Does Not Suppress Motor Neuron Degeneration In The Sod1g93a Mouse Model Of Amyotrophic Lateral Sclerosis, 2018 University of Massachusetts Medical School
Loss Of Sarm1 Does Not Suppress Motor Neuron Degeneration In The Sod1g93a Mouse Model Of Amyotrophic Lateral Sclerosis, Owen M. Peters, Elizabeth A. Lewis, Jeannette M. Osterloh, Alexandra Weiss, Johnny Salameh, Jake P. Metterville, Robert H. Brown Jr., Marc R. Freeman
Neurobiology Publications and Presentations
Axon degeneration occurs in all neurodegenerative diseases, but the molecular pathways regulating axon destruction during neurodegeneration are poorly understood. Sterile Alpha and TIR Motif Containing 1 (Sarm1) is an essential component of the prodegenerative pathway driving axon degeneration after axotomy and represents an appealing target for therapeutic intervention in neurological conditions involving axon loss. Amyotrophic lateral sclerosis (ALS) is characterized by rapid, progressive motor neuron degeneration and muscle atrophy, causing paralysis and death. Patient tissue and animal models of ALS show destruction of upper and lower motor neuron cell bodies and loss of their associated axons. Here, we investigate whether ...
Identifying Kif Subtype That Mediates Axonal Targeting Of Kv7 Channels, 2018 St. Charles Community College
Identifying Kif Subtype That Mediates Axonal Targeting Of Kv7 Channels, Allison Houghton, Jennifer Walters, Mary Hong, Dhruv Joshi, Hee Jung Chung
Early-onset Benign Familial Neonatal Epilepsy (BFNE) and Epileptic Encephalopathy (EE), are associated with mutations in neuronal KCNQ/Kv7 channel subunits Kv7.2 and Kv7.3. Kv7 channels are voltage-dependent potassium channels. Enriched at the axonal plasma membrane, they pump potassium ions out of the neurons and inhibit repetitive or burst firing of action potentials. A single neuronal Kv7 channel is a heterotetramer composed of two Kv7.2 and two Kv7.3 subunits. BFNE and EE mutations in Kv7.2 and Kv7.3 lead to decreased surface expression along the axon, which means less potassium ions are moved across the axonal ...
Als-Associated Missense And Nonsense Tbk1 Mutations Can Both Cause Loss Of Kinase Function, 2018 King's College London
Als-Associated Missense And Nonsense Tbk1 Mutations Can Both Cause Loss Of Kinase Function, Martina De Majo, Kevin P. Kenna, Robert H. Brown Jr., John E. Landers, Christopher E. Shaw
Open Access Articles
Mutations in TANK binding kinase 1 (TBK1) have been linked to amyotrophic lateral sclerosis. Some TBK1 variants are nonsense and are predicted to cause disease through haploinsufficiency; however, many other mutations are missense with unknown functional effects. We exome sequenced 699 familial amyotrophic lateral sclerosis patients and identified 16 TBK1 novel or extremely rare protein-changing variants. We characterized a subset of these: p.G217R, p.R357X, and p.C471Y. Here, we show that the p.R357X and p.G217R both abolish the ability of TBK1 to phosphorylate 2 of its kinase targets, IRF3 and optineurin, and to undergo phosphorylation. They ...
Emerging Cellular And Molecular Strategies For Enhancing Central Nervous System (Cns) Remyelination., 2018 George Washington University
Emerging Cellular And Molecular Strategies For Enhancing Central Nervous System (Cns) Remyelination., Mohammad Abu-Rub, Robert H Miller
Anatomy and Regenerative Biology Faculty Publications
Myelination is critical for the normal functioning of the central nervous system (CNS) in vertebrates. Conditions in which the development of myelin is perturbed result in severely compromised individuals often with shorter lifespans, while loss of myelin in the adult results in a variety of functional deficits. Although some form of spontaneous remyelination often takes place, the repair process as a whole often fails. Several lines of evidence suggest it is feasible to develop strategies that enhance the capacity of the CNS to undergo remyelination and potentially reverse functional deficits. Such strategies include cellular therapies using either neural or mesenchymal ...
A Rationally Engineered Capsid Variant Of Aav9 For Systemic Cns-Directed And Peripheral Tissue-Detargeted Gene Delivery In Neonates, 2018 University of Massachusetts Medical School
A Rationally Engineered Capsid Variant Of Aav9 For Systemic Cns-Directed And Peripheral Tissue-Detargeted Gene Delivery In Neonates, Dan Wang, Shaoyong Li, Dominic J. Gessler, Jun Xie, Li Zhong, Jia Li, Karen Tran, Kim Van Vliet, Lingzhi Ren, Qin Su, Ran He, Jason E. Goetzmann, Terence R. Flotte, Mavis Agbandje-Mckenna, Guangping Gao
Open Access Articles
Adeno-associated virus (AAV) has provided the gene therapy field with the most powerful in vivo gene delivery vector to realize safe, efficacious, and sustainable therapeutic gene expression. Because many clinically relevant properties of AAV-based vectors are governed by the capsid, much research effort has been devoted to the development of AAV capsids for desired features. Here, we combine AAV capsid discovery from nature and rational engineering to report an AAV9 capsid variant, designated as AAV9.HR, which retains AAV9's capability to traverse the blood-brain barrier and transduce neurons. This variant shows reduced transduction in peripheral tissues when delivered through ...