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Paramyotonia Congenita
Paramyotonia congenita Description Paramyotonia congenita is a disorder that affects muscles used for movement (skeletal muscles). Beginning in infancy or early childhood, people with this condition experience bouts of sustained muscle tensing (myotonia) that prevent muscles from relaxing normally. Myotonia causes muscle stiffness that typically appears after exercise and can be induced by muscle cooling. This stiffness chiefly affects muscles in the face, neck, arms, and hands, although it can also affect muscles used for breathing and muscles in the lower body. Unlike many other forms of myotonia, the muscle stiffness associated with paramyotonia congenita tends to worsen with repeated movements. Most people—even those without muscle disease—feel that their muscles do not work as well when they are cold. This effect is dramatic in people with paramyotonia congenita. Exposure to cold initially causes muscle stiffness in these individuals, and prolonged cold exposure leads to temporary episodes of mild to severe muscle weakness that may last for several hours at a time. Some older people with paramyotonia congenita develop permanent muscle weakness that can be disabling. Frequency Paramyotonia congenita is an uncommon disorder; it is estimated to affect fewer than 1 in 100,000 people. Causes Mutations in the SCN4A gene cause paramyotonia congenita. This gene provides instructions for making a protein that is critical for the normal function of skeletal muscle cells. For the body to move normally, skeletal muscles must tense (contract) and relax in a coordinated way. Muscle contractions are triggered by the flow of positively charged atoms (ions), including sodium, into skeletal muscle cells. The SCN4A protein forms channels that control the flow of sodium ions into these cells. -
Primary Cilia in Energy Balance Signaling and Metabolic Disorder
BMB Rep. 2015; 48(12): 647-654 BMB www.bmbreports.org Reports Invited Mini Review Primary cilia in energy balance signaling and metabolic disorder Hankyu Lee, Jieun Song, Joo Hyun Jung & Hyuk Wan Ko* College of Pharmacy, Dongguk University, Goyang 10326, Korea Energy homeostasis in our body system is maintained by bal- complex, due to many confounding genetics and environ- ancing the intake and expenditure of energy. Excessive accu- mental factors equivocally affecting the progress of the disease. mulation of fat by disrupting the balance system causes over- Moreover, metabolic disorders are interrelated diseases exem- weight and obesity, which are increasingly becoming global plified by the association of obesity with insulin resistance, health concerns. Understanding the pathogenesis of obesity fo- leading to development of type II diabetes (2). Genetic factors cused on studying the genes related to familial types of for obesity are poorly understood, and recent progress by ge- obesity. Recently, a rare human genetic disorder, ciliopathy, nome-wide association studies support the notion of polygenic links the role for genes regulating structure and function of a features of obesity which suggests that multiple genes, tissues cellular organelle, the primary cilium, to metabolic disorder, and pathways contribute to the disease (3, 4). Intriguing subset obesity and type II diabetes. Primary cilia are microtubule of genes associated with obesity cause a dysfunction of pri- based hair-like membranous structures, lacking motility and mary cilia, which results in a rare pleiotropic human disorder functions such as sensing the environmental cues, and trans- called ciliopathy (5, 6). Primary cilia are microtubule based ducing extracellular signals within the cells. -
The Counsyl Foresight™ Carrier Screen
The Counsyl Foresight™ Carrier Screen 180 Kimball Way | South San Francisco, CA 94080 www.counsyl.com | [email protected] | (888) COUNSYL The Counsyl Foresight Carrier Screen - Disease Reference Book 11-beta-hydroxylase-deficient Congenital Adrenal Hyperplasia .................................................................................................................................................................................... 8 21-hydroxylase-deficient Congenital Adrenal Hyperplasia ...........................................................................................................................................................................................10 6-pyruvoyl-tetrahydropterin Synthase Deficiency ..........................................................................................................................................................................................................12 ABCC8-related Hyperinsulinism........................................................................................................................................................................................................................................ 14 Adenosine Deaminase Deficiency .................................................................................................................................................................................................................................... 16 Alpha Thalassemia............................................................................................................................................................................................................................................................. -
Disease Reference Book
The Counsyl Foresight™ Carrier Screen 180 Kimball Way | South San Francisco, CA 94080 www.counsyl.com | [email protected] | (888) COUNSYL The Counsyl Foresight Carrier Screen - Disease Reference Book 11-beta-hydroxylase-deficient Congenital Adrenal Hyperplasia .................................................................................................................................................................................... 8 21-hydroxylase-deficient Congenital Adrenal Hyperplasia ...........................................................................................................................................................................................10 6-pyruvoyl-tetrahydropterin Synthase Deficiency ..........................................................................................................................................................................................................12 ABCC8-related Hyperinsulinism........................................................................................................................................................................................................................................ 14 Adenosine Deaminase Deficiency .................................................................................................................................................................................................................................... 16 Alpha Thalassemia............................................................................................................................................................................................................................................................. -
EYE DISEASES July 15-17, 2019
International Conference on EYE DISEASES July 15-17, 2019 Venue Sonesta Fort Lauderdale Beach 999 N Fort Lauderdale Beach Blvd Fort Lauderdale, FL Exhibitor Day-1 | Monday July 15, 2019 Keynote Talks Vascular Basement Membrane Thickening in Diabetic Retinopathy Sayon Roy Boston University School of Medicine, Boston, MA Biography Dr. Sayon Roy is a Professor of Medicine and Ophthalmology in Department Ophthalmology, Boston University. He completed his B.S. and M.S. from University of Kalyani, India. He received his PhD from Boston University. Dr. Roy’s seminal work has identified several genes in the retina that are abnormally expressed in diabetic retinopathy. His pioneering work has led to novel gene modulatory techniques in retinal vascular cells using antisense oligonucleotides via intravitreal injection. Dr. Roy has received numerous awards including the American Diabetes Association Research Award for the commitment and dedication towards the fight against diabetes, the 2006 Mentor of the Year Award from Boston University, and the 2008 Innovative Award from the Juvenile Diabetes Research Foundation Does Genomics Play a Role in Diabetic Retinopathy? Arup Das1, Sampath Kumar Rangasamy2, Finny Monickaraj1, David Duggan2, Nicholas Schork2 and Paul McGuire1 1University of New Mexico School of Medicine, Albuquerque, NM 2 Translational and Genomics Research Institute, NM Abstract Genetic risk factors play an important role in the development and progression of diabetic retinopathy (DR). Using a well- defined, clinical phenotype, we have examined the role of rare genetic variants in DR progression, or protection by undertaking whole exome sequencing (WES). We performed WES analysis on two cohorts of patients selected from Diabetic Retinopathy Genomics (DRGen) study population. -
Alport Syndrome of the European Dialysis Population Suffers from AS [26], and Simi- Lar Figures Have Been Found in Other Series
DOCTOR OF MEDICAL SCIENCE Patients with AS constitute 2.3% (11/476) of the renal transplant population at the Mayo Clinic [24], and 1.3% of 1,000 consecutive kidney transplant patients from Sweden [25]. Approximately 0.56% Alport syndrome of the European dialysis population suffers from AS [26], and simi- lar figures have been found in other series. AS accounts for 18% of Molecular genetic aspects the patients undergoing dialysis or having received a kidney graft in 2003 in French Polynesia [27]. A common founder mutation was in Jens Michael Hertz this area. In Denmark, the percentage of patients with AS among all patients starting treatment for ESRD ranges from 0 to 1.21% (mean: 0.42%) in a twelve year period from 1990 to 2001 (Danish National This review has been accepted as a thesis together with nine previously pub- Registry. Report on Dialysis and Transplantation in Denmark 2001). lished papers by the University of Aarhus, February 5, 2009, and defended on This is probably an underestimate due to the difficulties of establish- May 15, 2009. ing the diagnosis. Department of Clinical Genetics, Aarhus University Hospital, and Faculty of Health Sciences, Aarhus University, Denmark. 1.3 CLINICAL FEATURES OF X-LINKED AS Correspondence: Klinisk Genetisk Afdeling, Århus Sygehus, Århus Univer- 1.3.1 Renal features sitetshospital, Nørrebrogade 44, 8000 Århus C, Denmark. AS in its classic form is a hereditary nephropathy associated with E-mail: [email protected] sensorineural hearing loss and ocular manifestations. The charac- Official opponents: Lisbeth Tranebjærg, Allan Meldgaard Lund, and Torben teristic renal features in AS are persistent microscopic hematuria ap- F. -
Development of the Stria Vascularis and Potassium Regulation in the Human Fetal Cochlea: Insights Into Hereditary Sensorineural Hearing Loss
Development of the Stria Vascularis and Potassium Regulation in the Human Fetal Cochlea: Insights into Hereditary Sensorineural Hearing Loss Heiko Locher,1,2 John C.M.J. de Groot,2 Liesbeth van Iperen,1 Margriet A. Huisman,2 Johan H.M. Frijns,2 Susana M. Chuva de Sousa Lopes1,3 1 Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, 2333 ZA, the Netherlands 2 Department of Otorhinolaryngology and Head and Neck Surgery, Leiden University Medical Center, Leiden, 2333 ZA, the Netherlands 3 Department for Reproductive Medicine, Ghent University Hospital, 9000 Ghent, Belgium Received 25 August 2014; revised 2 February 2015; accepted 2 February 2015 ABSTRACT: Sensorineural hearing loss (SNHL) is dynamics of key potassium-regulating proteins. At W12, one of the most common congenital disorders in humans, MITF1/SOX101/KIT1 neural-crest-derived melano- afflicting one in every thousand newborns. The majority cytes migrated into the cochlea and penetrated the base- is of heritable origin and can be divided in syndromic ment membrane of the lateral wall epithelium, and nonsyndromic forms. Knowledge of the expression developing into the intermediate cells of the stria vascula- profile of affected genes in the human fetal cochlea is lim- ris. These melanocytes tightly integrated with Na1/K1- ited, and as many of the gene mutations causing SNHL ATPase-positive marginal cells, which started to express likely affect the stria vascularis or cochlear potassium KCNQ1 in their apical membrane at W16. At W18, homeostasis (both essential to hearing), a better insight KCNJ10 and gap junction proteins GJB2/CX26 and into the embryological development of this organ is GJB6/CX30 were expressed in the cells in the outer sul- needed to understand SNHL etiologies. -
Neuromyotonia in Hereditary Motor Neuropathy J Neurol Neurosurg Psychiatry: First Published As 10.1136/Jnnp.54.3.230 on 1 March 1991
230 Journal ofNeurology, Neurosurgery, and Psychiatry 1991;54:230-235 Neuromyotonia in hereditary motor neuropathy J Neurol Neurosurg Psychiatry: first published as 10.1136/jnnp.54.3.230 on 1 March 1991. Downloaded from A F Hahn, A W Parkes, C F Bolton, S A Stewart Abstract Case II2 Two siblings with a distal motor This 15 year old boy had always been clumsy. neuropathy experienced cramping and Since the age of 10, he had noticed generalised difficulty in relaxing their muscles after muscle stiffness which increased with physical voluntary contraction. Electromyogra- activity such as walking upstairs, running and phic recordings at rest revealed skating. For some time, he was aware of repetitive high voltage spontaneous elec- difficulty in releasing his grip and his fingers trical discharges that were accentuated tended to cramp on writing. He had noticed after voluntary contraction and during involuntary twitching of his fingers, forearm ischaemia. Regional neuromuscular muscles and thighs at rest and it was more blockage with curare indicated hyperex- pronounced after a forceful voluntary con- citability of peripheral nerve fibres and traction. Muscle cramping and spontaneous nerve block suggested that the ectopic muscle activity were particularly unpleasant activity originated in proximal segments when he re-entered the house in the winter, of the nerve. Symptoms were improved for example, after a game of hockey. Since the with diphenylhydantoin, carbamazepine age of twelve, he had noticed a tendency to and tocainide. trip. Subsequently he developed bilateral foot drop and weakness of his hands. He denied sensory symptoms and perspired only with The term "neuromyotonia" was coined by exertion. -
Générique Obésités De Causes Rares
Protocole National de Diagnostic et de Soins (PNDS) Générique Obésités de causes rares Centre de Référence des maladies rares PRADORT Syndrome de PRADer-Willi et autres Obésités Rares avec Troubles du comportement alimentaire 19 JUILLET 2021 Partie 2 – Argumentaire Cet argumentaire a été élaboré par le Centre de Référence du Syndrome de PRAder-Willi et autres Obésités Rares avec Troubles du comportement alimentaire (PRADORT) . Il a servi de base à l’élaboration du PNDS : Obésités de causes rares. Le PNDS est téléchargeable sur le site de l’HAS, le site du centre de référence PRADORT et le site de la filière DEFISCIENCES CRMR PRADORT 19/07/2021 DéfiScience Filière de santé maladies rares neurdéveloppement 1 Sommaire Liste des abréviations ........................................................................................3 Préambule ........................................................................................................4 Méthode de travail 4 Argumentaire ....................................................................................................5 1.1 Recherche documentaire 5 1.1.1 Base de données et nombre de références 5 1.1.2 Critères de sélection des articles 6 1.2 Sélection des articles 7 1.2.1 Recommandations HAS 7 1.2.2 Articles 10 Annexe 1. Liste des participants ........................................................................108 Annexe 2. Adresses et Coordonnées .................................................................110 Références bibliographiques .............................................................................111 -
Essential Trace Elements in Human Health: a Physician's View
Margarita G. Skalnaya, Anatoly V. Skalny ESSENTIAL TRACE ELEMENTS IN HUMAN HEALTH: A PHYSICIAN'S VIEW Reviewers: Philippe Collery, M.D., Ph.D. Ivan V. Radysh, M.D., Ph.D., D.Sc. Tomsk Publishing House of Tomsk State University 2018 2 Essential trace elements in human health UDK 612:577.1 LBC 52.57 S66 Skalnaya Margarita G., Skalny Anatoly V. S66 Essential trace elements in human health: a physician's view. – Tomsk : Publishing House of Tomsk State University, 2018. – 224 p. ISBN 978-5-94621-683-8 Disturbances in trace element homeostasis may result in the development of pathologic states and diseases. The most characteristic patterns of a modern human being are deficiency of essential and excess of toxic trace elements. Such a deficiency frequently occurs due to insufficient trace element content in diets or increased requirements of an organism. All these changes of trace element homeostasis form an individual trace element portrait of a person. Consequently, impaired balance of every trace element should be analyzed in the view of other patterns of trace element portrait. Only personalized approach to diagnosis can meet these requirements and result in successful treatment. Effective management and timely diagnosis of trace element deficiency and toxicity may occur only in the case of adequate assessment of trace element status of every individual based on recent data on trace element metabolism. Therefore, the most recent basic data on participation of essential trace elements in physiological processes, metabolism, routes and volumes of entering to the body, relation to various diseases, medical applications with a special focus on iron (Fe), copper (Cu), manganese (Mn), zinc (Zn), selenium (Se), iodine (I), cobalt (Co), chromium, and molybdenum (Mo) are reviewed. -
What Is a Skeletal Muscle Channelopathy?
Muscle Channel Patient Day 2019 Dr Emma Matthews The Team • Professor Michael Hanna • Emma Matthews • Doreen Fialho - neurophysiology • Natalie James – clinical nurse specialist • Sarah Holmes - physiotherapy • Richa Sud - genetics • Roope Mannikko – electrophysiology • Iwona Skorupinska – research nurse • Louise Germain – research nurse • Kira Baden- service manager • Jackie Kasoze-Batende– NCG manager • Jean Elliott – NCG senior secretary • Karen Suetterlin, Vino Vivekanandam • – research fellows What is a skeletal muscle channelopathy? Muscle and nerves communicate by electrical signals Electrical signals are made by the movement of positively and negatively charged ions in and out of cells The ions can only move through dedicated ion channels If the channel doesn’t work properly, you have a “channelopathy” Ion channels CHLORIDE CHANNELS • Myotonia congenita – CLCN1 • Paramyotonia congenita – SCN4A MYOTONIA SODIUM CHANNELS • Hyperkalaemic periodic paralysis – SCN4A • Hypokalaemic periodic paralysis – 80% CACNA1S CALCIUM CHANNELS – 10% SCN4A PARALYSIS • Andersen-Tawil Syndrome – KCNJ2 POTASSIUM CHANNELS Myotonia and Paralysis • Two main symptoms • Paralysis = an inexcitable muscle – Muscles are very weak or paralysed • Myotonia = an overexcited muscle – Muscle keeps contracting and become “stuck” - Nerve action potential Cl_ - + - + + + Motor nerve K+ + Na+ Na+ Muscle membrane Ach Motor end plate T-tubule Nav1.4 Ach receptors Cav1.1 and RYR1 Muscle action potential Calcium MuscleRelaxed contraction muscle Myotonia Congenita • Myotonia -
2018 Celebration of Research
UNIVERSITY OF FLORIDA COLLEGE OF MEDICINE 2018 Celebration of Research Welcome from the Dean The annual University of Florida College of Medicine Celebration of Research affords me the opportunity to say Thank You. Thank you for the late nights, the papers written and reviewed, the grant proposals that have been funded and those that will be resubmitted, the patience that you have shown with the varied hurdles placed in the pathway of research. But most importantly, thank you for the passion that you employ to move the boundary of science knowledge forward. Your research vision and the work of your research teams are appreciated and valued. The discoveries and inventions that result from the basic, translational, population and clinical research at our university are transforming medicine. Thank you for your dedication to creating a healthier future for all. The College of Medicine stands proudly behind your efforts. Michael L. Good, MD Dean, UF College of Medicine Celebration of Research 3 POSTER SESSION & RECEPTION Monday, February 19, 2018 5:30pm – 8:30pm Stephen C. O’Connell Center Slow down and smell the roses The 2018 Celebration is already here. Where did the year go? 2017 was indeed another remarkable year of continued growth and progress for research within the College of Medicine, and 2018 is already off to a great start. We have all been running and seem a bit out of breath. Now it is time to slow down and appreciate the breadth and depth of the College of Medicine’s research endeavors and recognize how our research is directed at fundamental, timely, and significant areas of human health.