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https://www.readbyqxmd.com/read/28915855/massive-parallel-sequencing-as-a-new-diagnostic-approach-for-phenylketonuria-and-tetrahydrobiopterin-deficiency-in-thailand
#1
Pongsathorn Chaiyasap, Chupong Ittiwut, Chalurmpon Srichomthong, Apiruk Sangsin, Kanya Suphapeetiporn, Vorasuk Shotelersuk
BACKGROUND: Hyperphenylalaninemia (HPA) can be classified into phenylketonuria (PKU) which is caused by mutations in the phenylalanine hydroxylase (PAH) gene, and BH4 deficiency caused by alterations in genes involved in tetrahydrobiopterin (BH4) biosynthesis pathway. Dietary restriction of phenylalanine is considered to be the main treatment of PKU to prevent irreversible intellectual disability. However, the same dietary intervention in BH4 deficiency patients is not as effective, as BH4 is also a cofactor in many neurotransmitter syntheses...
September 16, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28910830/consensus-guidelines-for-therapeutic-drug-monitoring-in-neuropsychopharmacology-update-2017
#2
C Hiemke, N Bergemann, H W Clement, A Conca, J Deckert, K Domschke, G Eckermann, K Egberts, M Gerlach, C Greiner, G Gründer, E Haen, U Havemann-Reinecke, G Hefner, R Helmer, G Janssen, E Jaquenoud, G Laux, T Messer, R Mössner, M J Müller, M Paulzen, B Pfuhlmann, P Riederer, A Saria, B Schoppek, G Schoretsanitis, M Schwarz, M Silva Gracia, B Stegmann, W Steimer, J C Stingl, M Uhr, S Ulrich, S Unterecker, R Waschgler, G Zernig, G Zurek, P Baumann
Therapeutic drug monitoring (TDM) is the quantification and interpretation of drug concentrations in blood to optimize pharmacotherapy. It considers the interindividual variability of pharmacokinetics and thus enables personalized pharmacotherapy. In psychiatry and neurology, patient populations that may particularly benefit from TDM are children and adolescents, pregnant women, elderly patients, individuals with intellectual disabilities, patients with substance abuse disorders, forensic psychiatric patients or patients with known or suspected pharmacokinetic abnormalities...
September 14, 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28898171/febrile-infection-related-epilepsy-syndrome-fires-a-literature-review-and-case-study
#3
Kristy Fox, Mary Ellen Wells, Michael Tennison, Bradley Vaughn
Febrile infection-related epilepsy syndrome (FIRES) is a catastrophic epileptic syndrome that strikes previously healthy children aged 3-15 years and has an unknown pathogenesis and few treatments. These children experience a nonspecific febrile illness that is followed by prolonged refractory status epilepticus. Although the etiology is unknown, FIRES has a biphasic presentation, with the acute phase beginning as seizure activity lasting 1-12 weeks, then followed by the chronic phase, which is characterized by refractory seizures that cluster every 2-4 weeks, and may continue to be multifocal and independent...
2017: Neurodiagnostic Journal
https://www.readbyqxmd.com/read/28894950/autism-spectrum-disorder-an-early-and-frequent-feature-in-cerebrotendinous-xanthomatosis
#4
Bianca M L Stelten, Olivier Bonnot, Hidde H Huidekoper, Francjan J van Spronsen, Peter M van Hasselt, Leo A J Kluijtmans, Ron A Wevers, Aad Verrips
BACKGROUND: Cerebrotendinous xanthomatosis (CTX) is an autosomal recessively inherited inborn error of metabolism (IEM) due to mutations in the CYP27A1 gene. The clinical picture ranges from being nearly asymptomatic in early childhood, up to severe disability at adult age. Infantile-onset diarrhea and juvenile-onset cataract are the earliest symptoms in childhood. In the current study, we evaluated the presence of autism spectrum disorder (ASD) in a large cohort of CTX patients. METHODS: We performed a retrospective patient file study in 77 genetically confirmed Dutch CTX patients to determine the frequency of ASD...
September 11, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28880353/-sleep-wake-patterns-in-adults-with-autism-spectrum-disorders-in-a-clinical-setting-a-pilot-study
#5
G J Rosbergen, M P Jansen, A R Rosbergen-De Vries, Y Roke, R Otten
The negative consequences of sleep-wake disorders in the general population and in children with an autism spectrum disorder (ASD) are well-established. However, little is known about sleep-wake disorders in adults with ASD.<br/> AIM: To study and measure sleep-wake disorders and sleep-wake patterns in adults in a clinical facility who have been diagnosed primarily as having ASD without any comorbid intellectual disability.<br/> METHOD: We assessed the sleep patterns of 19 patients in a residential facility...
2017: Tijdschrift Voor Psychiatrie
https://www.readbyqxmd.com/read/28880200/the-endocannabinoid-system-and-autism-spectrum-disorders-insights-from-animal-models
#6
REVIEW
Erica Zamberletti, Marina Gabaglio, Daniela Parolaro
Autism spectrum disorder (ASD) defines a group of neurodevelopmental disorders whose symptoms include impaired communication and social interaction with restricted or repetitive motor movements, frequently associated with general cognitive deficits. Although it is among the most severe chronic childhood disorders in terms of prevalence, morbidity, and impact to the society, no effective treatment for ASD is yet available, possibly because its neurobiological basis is not clearly understood hence specific drugs have not yet been developed...
September 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28879201/wnt-%C3%AE-catenin-pathway-and-epigenetic-mechanisms-regulate-the-pitt-hopkins-syndrome-and-schizophrenia-risk-gene-tcf4
#7
Krista M Hennig, Daniel M Fass, Wen-Ning Zhao, Steven D Sheridan, Ting Fu, Serkan Erdin, Alexei Stortchevoi, Diane Lucente, Jannine D Cody, David Sweetser, James F Gusella, Michael E Talkowski, Stephen J Haggarty
Genetic variation within the transcription factor TCF4 locus can cause the intellectual disability and developmental disorder Pitt-Hopkins syndrome (PTHS), whereas single-nucleotide polymorphisms within noncoding regions are associated with schizophrenia. These genetic findings position TCF4 as a link between transcription and cognition; however, the neurobiology of TCF4 remains poorly understood. Here, we quantitated multiple distinct TCF4 transcript levels in human induced pluripotent stem cell-derived neural progenitors and differentiated neurons, and PTHS patient fibroblasts...
July 2017: Molecular Neuropsychiatry
https://www.readbyqxmd.com/read/28878728/patient-affected-by-beta-propeller-protein-associated-neurodegeneration-a-therapeutic-attempt-with-iron-chelation-therapy
#8
Mattia Fonderico, Michele Laudisi, Nico Golfrè Andreasi, Stefania Bigoni, Costanza Lamperti, Celeste Panteghini, Barbara Garavaglia, Miryam Carecchio, Elia Antonio Emanuele, Gian L Forni, Enrico Granieri
Here, we report the case of a 36-year-old patient with a diagnosis of de novo mutation of the WDR45 gene, responsible for beta-propeller protein-associated neurodegeneration, a phenotypically distinct, X-linked dominant form of Neurodegeneration with Brain Iron Accumulation. The clinical history is characterized by a relatively stable intellectual disability and a hypo-bradykinetic and hypertonic syndrome with juvenile onset. Genetic investigations and T1 and T2-weighted MR images align with what is described in literature...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28870133/treatment-outcomes-from-forensic-intellectual-disability-services-the-perspectives-of-patients-and-their-family-carers
#9
Verity Chester, Nicole Geach, Catrin Morrissey
INTRODUCTION: Research investigating the treatment outcomes of forensic intellectual and developmental disability (FIDD) services has largely focused on the perspectives of clinicians and researchers. This study sought the perspectives of patients and family/carers on the outcomes important to them. METHODS: Semi-structured consultation groups were conducted with patients in FIDD services ( n = 21) and family carers ( n = 6). Interview data were content analysed, and outcomes identified fell into three main domains (effectiveness, safety and patient experience)...
January 1, 2017: Journal of Intellectual Disabilities: JOID
https://www.readbyqxmd.com/read/28859571/exploring-the-brain-through-posterior-hypothalamus-surgery-for-aggressive-behavior
#10
Michele Rizzi, Andrea Trezza, Giuseppe Messina, Alessandro De Benedictis, Angelo Franzini, Carlo Efisio Marras
Neurological surgery offers an opportunity to study brain functions, through either resection or implanted neuromodulation devices. Pathological aggressive behavior in patients with intellectual disability is a frequent condition that is difficult to treat using either supportive care or pharmacological therapy. The bulk of the laboratory studies performed throughout the 19th century enabled the formulation of hypotheses on brain circuits involved in the generation of emotions. Aggressive behavior was also studied extensively...
September 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28818555/pyridoxine-5-phosphate-oxidase-pnpo-deficiency-clinical-and-biochemical-alterations-associated-with-the-c-347g-a-p-%C3%A2-arg116gln-mutation
#11
Martino L di Salvo, Mario Mastrangelo, Isabel Nogués, Manuela Tolve, Alessandro Paiardini, Carla Carducci, Davide Mei, Martino Montomoli, Angela Tramonti, Renzo Guerrini, Roberto Contestabile, Vincenzo Leuzzi
BACKGROUND: Pyridoxal-5(')-phosphate oxidase (PNPO) deficiency presents as a severe neonatal encephalopathy responsive to pyridoxal-5(')-phosphate (PLP) or pyridoxine. Recent studies widened the phenotype of this condition and detected genetic variants on PNPO gene whose pathogenic role and clinical expression remain to be established. OBJECTIVE: This paper aims to characterize the functional effects of the c.347G>A (p.Arg116Gln) mutation in the PNPO gene in order to define its pathogenicity and describe the clinical features of new patients with epilepsy carrying this mutation...
August 12, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28816003/prevalence-of-gastrointestinal-symptoms-in-angelman-syndrome
#12
Laura W Glassman, Olivia R Grocott, Portia A Kunz, Anna M Larson, Garrett Zella, Kriston Ganguli, Ronald L Thibert
Angelman syndrome (AS) is a neurogenetic disorder characterized by intellectual disability, expressive speech impairment, movement disorder, epilepsy, and a happy demeanor. Children with AS are frequently reported to be poor feeders during infancy and as having gastrointestinal issues such as constipation, reflux, and abnormal food related behaviors throughout their lifetime. To assess the prevalence of gastrointestinal disorders in individuals with AS, we retrospectively analyzed medical records of 120 individuals seen at the Angelman Syndrome Clinic at Massachusetts General Hospital and 43 individuals seen at the University of North Carolina Comprehensive Angelman Clinic...
August 16, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28813484/d-cycloserine-improves-synaptic-transmission-in-an-animal-mode-of-rett-syndrome
#13
Elisa S Na, Héctor De Jesús-Cortés, Arlene Martinez-Rivera, Zeeba D Kabir, Jieqi Wang, Vijayashree Ramesh, Yasemin Onder, Anjali M Rajadhyaksha, Lisa M Monteggia, Andrew A Pieper
Rett syndrome (RTT), a leading cause of intellectual disability in girls, is predominantly caused by mutations in the X-linked gene MECP2. Disruption of Mecp2 in mice recapitulates major features of RTT, including neurobehavioral abnormalities, which can be reversed by re-expression of normal Mecp2. Thus, there is reason to believe that RTT could be amenable to therapeutic intervention throughout the lifespan of patients after the onset of symptoms. A common feature underlying neuropsychiatric disorders, including RTT, is altered synaptic function in the brain...
2017: PloS One
https://www.readbyqxmd.com/read/28812061/behavioral-comorbidities-and-drug-treatments-in-a-zebrafish-scn1lab-model-of-dravet-syndrome
#14
Brian P Grone, Tiange Qu, Scott C Baraban
Loss-of-function mutations in SCN1A cause Dravet syndrome (DS), a catastrophic childhood epilepsy in which patients experience comorbid behavioral conditions, including movement disorders, sleep abnormalities, anxiety, and intellectual disability. To study the functional consequences of voltage-gated sodium channel mutations, we use zebrafish with a loss-of-function mutation in scn1lab, a zebrafish homolog of human SCN1A. Homozygous scn1lab(s552/s552) mutants exhibit early-life seizures, metabolic deficits, and early death...
July 2017: ENeuro
https://www.readbyqxmd.com/read/28804872/lacosamide-in-the-treatment-of-patients-with-epilepsy-and-intellectual-disabilities-a-long-term-study-of-136-patients
#15
Stefan Böttcher, Martin T Lutz, Thomas Mayer
OBJECTIVE: This study aimed to analyze the retention rate of lacosamide (LCM) in patients with epilepsy and intellectual disabilities (IDs), to identify factors influencing retention rate, and to investigate the LCM retention rate with and without concomitant sodium channel blocker (SCB). We hypothesized that the retention rate of LCM with concomitant SCB would be lower than without SCB. METHODS: Using the Kaplan-Meier estimator, we conducted a monocentric, retrospective, observational, open-label study to evaluate LCM retention rates in patients with IDs and drug-resistant epilepsy...
August 14, 2017: Epilepsia
https://www.readbyqxmd.com/read/28801146/bh4-deficiency-identified-in-a-neonatal-screening-program-for-hyperphenylalaninemia
#16
Cezar Antonio Abreu de Souza, Michelle Rosa Andrade Alves, Rosangelis Del Lama Soares, Viviane de Cássia Kanufre, Valéria de Melo Rodrigues, Rocksane de Carvalho Norton, Ana Lúcia Pimenta Starling, Marcos José Burle de Aguiar
OBJECTIVES: To show the general prevalence and to characterize tetrahydrobiopterin (BH4) deficiencies with hyperphenylalaninemia, identified by the Neonatal Screening Program of the State of Minas Gerais (NSPMG). METHODS: Descriptive study of patients with BH4 deficiency identified by the NSPMG. RESULTS: The prevalence found was 2.1 for 1,000,000 live births, with a frequency of 1.71% among hyperphenylalaninemias. There were four cases (40%) with 6-pyruvoyl-tetrahydropterin synthase (PTPS) deficiency, three with GTP cyclohydrolase I - autosomal recessive form (GTPCH I) deficiency, and three with dihydropteridine reductase (DHPR) deficiency (30% each)...
August 8, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28794131/heterogeneous-clinical-spectrum-of-dnajc12-deficient-hyperphenylalaninemia-from-attention-deficit-to-severe-dystonia-and-intellectual-disability
#17
Francjan J van Spronsen, Nastassja Himmelreich, Véronique Rüfenacht, Nan Shen, Danique van Vliet, Mohammed Al-Owain, Khushnooda Ramzan, Salwa M Alkhalifi, Roelineke J Lunsing, Rebecca M Heiner-Fokkema, Anahita Rassi, Corinne Gemperle-Britschgi, Georg F Hoffmann, Nenad Blau, Beat Thöny
BACKGROUND: Autosomal recessive mutations in DNAJC12, encoding a cochaperone of HSP70 with hitherto unknown function, were recently described to lead to hyperphenylalaninemia, central monoamine neurotransmitter (dopamine and serotonin) deficiency, dystonia and intellectual disability in six subjects affected by homozygous variants. OBJECTIVE: Patients exhibiting hyperphenylalaninemia in whom deficiencies in hepatic phenylalanine hydroxylase and tetrahydrobiopterin cofactor metabolism had been excluded were subsequently analysed for DNAJC12 variants...
August 9, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28792289/a-guide-to-psychopharmacological-treatment-of-patients-with-intellectual-disability-in-psychiatry
#18
Rosa M Molina-Ruiz, Julia Martín-Carballeda, Inmaculada Asensio-Moreno, Francisco Montañés-Rada
Background Subjects with intellectual disability are at increased risk of having comorbid psychiatric disorders and worse response to psychotherapeutic and psychopharmacological treatment interventions. On the other hand, available data on best treatment approach in this population are scarce and lack scientific evidence due to methodological limitations. The present study aims to perform a systematic review of the literature to facilitate the use of psychotropic drugs in clinical practice and better establish future research targets in this field...
March 2017: International Journal of Psychiatry in Medicine
https://www.readbyqxmd.com/read/28777499/alg13-cdg-in-a-male-with-seizures-normal-cognitive-development-and-normal-transferrin-isoelectric-focusing
#19
Therese E Gadomski, Melody Bolton, Majid Alfadhel, Chris Dvorak, Olalekan A Ogunsakin, Stephen L Nelson, Eva Morava
ALG13-CDG has been recently discovered as a disorder of severe developmental, intellectual and speech disability, microcephaly, visual abnormalities, seizures, hepatomegaly, coagulation abnormalities, and abnormal serumtransferrin isoelectric focusing in serum. A male with seizures, delayed motor, and speech development, but normal cognition carried a hemizygous, predicted pathogenic ALG13 variant (p.E463G). N-glycosylation studies in plasma were normal. ICAM-1 expression was decreased in patient fibroblasts, supporting the variant's pathogenicity...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28758966/variability-of-creatine-metabolism-genes-in-children-with-autism-spectrum-disorder
#20
Jessie M Cameron, Valeriy Levandovskiy, Wendy Roberts, Evdokia Anagnostou, Stephen Scherer, Alvin Loh, Andreas Schulze
Creatine deficiency syndrome (CDS) comprises three separate enzyme deficiencies with overlapping clinical presentations: arginine:glycine amidinotransferase (GATM gene, glycine amidinotransferase), guanidinoacetate methyltransferase (GAMT gene), and creatine transporter deficiency (SLC6A8 gene, solute carrier family 6 member 8). CDS presents with developmental delays/regression, intellectual disability, speech and language impairment, autistic behaviour, epileptic seizures, treatment-refractory epilepsy, and extrapyramidal movement disorders; symptoms that are also evident in children with autism...
July 31, 2017: International Journal of Molecular Sciences
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