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Prader-Willi syndrome

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https://www.readbyqxmd.com/read/29441128/chromosomal-microarray-analysis-in-the-genetic-evaluation-of-279-patients-with-syndromic-obesity
#1
Carla Sustek D'Angelo, Monica Castro Varela, Claudia Irene Emílio de Castro, Paulo Alberto Otto, Ana Beatriz Alvarez Perez, Charles Marques Lourenço, Chong Ae Kim, Debora Romeo Bertola, Fernando Kok, Luis Garcia-Alonso, Celia Priszkulnik Koiffmann
Background: Syndromic obesity is an umbrella term used to describe cases where obesity occurs with additional phenotypes. It often arises as part of a distinct genetic syndrome with Prader-Willi syndrome being a classical example. These rare forms of obesity provide a unique source for identifying obesity-related genetic changes. Chromosomal microarray analysis (CMA) has allowed the characterization of new genetic forms of syndromic obesity, which are due to copy number variants (CNVs); however, CMA in large cohorts requires more study...
2018: Molecular Cytogenetics
https://www.readbyqxmd.com/read/29437709/prader-willi-syndrome-a-nest-for-premature-coronary-artery-disease
#2
Diogo Rodrigues Brás, Pedro Semedo, Bruno Cordeiro Piçarra, Renato Fernandes
Individuals affected by Prader-Willi syndrome (PWS) may show increased risk for coronary artery disease (CAD), which probably relates, at least, with high burden of cardiovascular risk factors.A 27-year-old man with PWS, obesity, hypertension, diabetes mellitus and dyslipidaemia attended the emergency department with complaints of flu-like condition and chest pain. The ECG revealed a mild ST-segment elevation in inferior leads, followed by positive myocardial necrosis biomarkers. Attending to the high cardiovascular risk profile, ST-segment elevation in inferior territory and wall motion abnormalities, a coronary angiogram was performed...
February 7, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29437285/three-siblings-with-prader-willi-syndrome-caused-by-imprinting-center-microdeletions-and-review
#3
Samantha N Hartin, Waheeda A Hossain, Nicolette Weisensel, Merlin G Butler
Prader-Willi syndrome (PWS) is a complex genetic imprinting disorder characterized by childhood obesity, short stature, hypogonadism/hypogenitalism, hypotonia, cognitive impairment, and behavioral problems. Usually PWS occurs sporadically due to the loss of paternally expressed genes on chromosome 15 with the majority of individuals having the 15q11-q13 region deleted. Examples of familial PWS have been reported but rarely. To date 13 families have been reported with more than one child with PWS and without a 15q11-q13 deletion secondary to a chromosome 15 translocation, inversion, or uniparental maternal disomy 15...
February 13, 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29433608/brain-stem-serotonin-transporter-availability-in-maternal-uniparental-disomy-and-deletion-prader-willi-syndrome
#4
Rajeev Krishnadas, Sally-Ann Cooper, Alice Nicol, Sally Pimlott, Sarita Soni, Anthony J Holland, Laura McArthur, Jonathan Cavanagh
Prader-Willi syndrome (PWS) is a rare condition because of the deletion of paternal chromosomal material (del PWS), or a maternal uniparental disomy (mUPD PWS), at 15q11-13. Affective psychosis is more prevalent in mUPD PWS. We investigated the relationship between the two PWS genetic variants and brain-stem serotonin transporter (5-HTT) availability in adult humans. Mean brain-stem 5-HTT availability determined by [123I]-beta-CIT single photon emission tomography was lower in eight adults with mUPD PWS compared with nine adults with del PWS (mean difference -0...
January 2018: British Journal of Psychiatry: the Journal of Mental Science
https://www.readbyqxmd.com/read/29425059/prader-willi-syndrome-and-angelman-syndrome-visualisation-of-the-molecular-pathways-for-two-chromosomal-disorders
#5
Friederike Ehrhart, Kelly J M Janssen, Susan L Coort, Chris T Evelo, Leopold M G Curfs
OBJECTIVES: Prader-Willi syndrome (PWS) and Angelman syndrome (AS) are two syndromes that are caused by the same chromosomal deletion on 15q11.2-q13. Due to methylation patterns, different genes are responsible for the two distinct phenotypes resulting in the disorders. Patients of both disorders exhibit hypotonia in neonatal stage, delay in development and hypopigmentation. Typical features for PWS include hyperphagia, which leads to obesity, the major cause of mortality, and hypogonadism...
February 9, 2018: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/29419854/-analysis-of-10-patients-with-duplications-of-15q11q13-region-and-autism-features
#6
Weipeng Wang, Changming Hu, Xin Bi, Haiming Yuan
OBJECTIVE To analyze the clinical and genetic features of 10 unrelated patients with duplications of 15q11q13 region and autism features.METHODS Karyotyping,chromosomal microarray analysis (CMA) and fluorescence in situ hybridization (FISH) were carried out for the patients and their parents.RESULTS Eight patients presented with a supernumerary marker chromosome (SMC) of unknown origin by G-banding analysis and triplication of the 15q11q13 region by high-resolution CMA analysis. Two remaining patients had normal karyotypes but duplications of the 15q11q13 region...
February 10, 2018: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/29418016/bone-mineral-density-in-young-adults-with-prader-willi-syndrome-a-randomized-placebo-controlled-cross-over-gh-trial
#7
Stephany H Donze, Renske J Kuppens, Nienke E Bakker, Janiëlle A E M van Alfen-van der Velden, Anita C S Hokken-Koelega
CONTEXT: The prevalence of osteoporosis is increased in adults with Prader-Willi syndrome (PWS). In children with PWS, growth hormone (GH) treatment has beneficial effects on bone mineral density (BMD). BMD might deteriorate after cessation of GH at adult height (AH), while continuing GH might maintain BMD. OBJECTIVE: To investigate the effects of GH versus placebo, and furthermore the effects of sex steroid replacement therapy (SSRT), on BMD in GH-treated young adults with PWS who had attained AH...
February 8, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29412007/eye-tracking-as-a-marker-of-hyperphagia-in-prader-willi-syndrome
#8
Alexandra P Key, Elisabeth M Dykens
This study examined the feasibility of eye tracking measures as markers of hyperphagia in 42 children and adults with Prader-Willi syndrome (PWS). Gaze data collected during free visual exploration of complex displays revealed that food images may not have an overall superior salience in PWS. However, increased attention to food in the context of other high-interest items was associated with higher scores on caregiver reports of hyperphagia. The study also provided preliminary evidence of test-retest reliability of eye tracking measures, suggesting that gaze characteristics may be a promising objective marker of food-related interests in PWS...
February 7, 2018: Developmental Neuropsychology
https://www.readbyqxmd.com/read/29401073/growth-friendly-surgery-and-serial-cast-correction-in-the-treatment-of-early-onset-scoliosis-for-patients-with-prader-willi-syndrome
#9
Jonathan Oore, Braydon Connell, Burt Yaszay, Amer Samdani, Tricia St Hilaire, Tara Flynn, Ron El-Hawary
BACKGROUND: Prader-Willi syndrome (PWS) patients can present with scoliosis which can be treated with serial cast correction (SCC) or with growth friendly surgery (GFS). This study's purpose was to describe the results of SCC as well as GFS for PWS patients with early-onset scoliosis (EOS). METHODS: PWS patients were identified from 2 international multicenter EOS databases. Scoliosis, kyphosis, spine height (T1-S1), right/left hemithoracic heights/widths (RHTH, LHTH, RHTW, LHTW) were measured pretreatment, postoperation, and at 2-year follow-up...
February 2, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29390364/silent-aspiration-in-infants-with-prader-willi-syndrome-identified-by-videofluoroscopic-swallow-study
#10
Parisa Salehi, Holly J Stafford, Robin P Glass, Anne Leavitt, Anita E Beck, Amber McAfee, Lusine Ambartsumyan, Maida Chen
Feeding intolerance in Prader-Willi syndrome (PWS) infants is well-recognized, but their swallow physiology is not well understood. Swallow dysfunction increases risks of respiratory compromise and choking, which have a high incidence in PWS. To investigate swallow pathology in PWS infants we undertook a retrospective review of videofluoroscopic swallow studies (VFSS) in infants with PWS seen at our institution. We hypothesize that VFSS will characterize swallow pathology suspected by clinical observation during a feeding evaluation and may help determine feeding safety in these infants...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29376891/hypothalamic-loss-of-snord116-and-prader-willi-syndrome-hyperphagia-the-buck-stops-here
#11
Juan A Rodriguez, Jeffrey M Zigman
Hyperphagia and obesity are the best-known manifestations of Prader-Willi syndrome (PWS) and are responsible for most of the overall morbidity and mortality associated with the disease. Yet these PWS symptoms remain poorly understood and without effective pharmacologic therapies. Mouse models attempting to recapitulate both the genetic alterations and marked hyperphagia plus obesity of PWS have been enigmatic, leading to skepticism about the use of mouse models to investigate PWS. In this issue of the JCI, Polex-Wolf and colleagues challenge the skeptics by successfully inducing hyperphagia following bilateral mediobasal hypothalamic deletion of the Snord116 gene from adult mice...
January 29, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29376887/hypothalamic-loss-of-snord116-recapitulates-the-hyperphagia-of-prader-willi-syndrome
#12
Joseph Polex-Wolf, Brian Yh Lam, Rachel Larder, John Tadross, Debra Rimmington, Fàtima Bosch, Verónica Jiménez Cenzano, Eduard Ayuso, Marcella Kl Ma, Kara Rainbow, Anthony P Coll, Stephen O'Rahilly, Giles Sh Yeo
Profound hyperphagia is a major disabling feature of Prader-Willi syndrome (PWS). Characterization of the mechanisms that underlie PWS-associated hyperphagia has been slowed by the paucity of animal models with increased food intake or obesity. Mice with a microdeletion encompassing the Snord116 cluster of noncoding RNAs encoded within the Prader-Willi minimal deletion critical region have previously been reported to show growth retardation and hyperphagia. Here, consistent with previous reports, we observed growth retardation in Snord116+/-P mice with a congenital paternal Snord116 deletion...
January 29, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29371863/body-composition-adipokines-bone-mineral-density-and-bone-remodeling-markers-in-relation-to-igf-1-levels-in-adults-with-prader-willi-syndrome
#13
I Caroline van Nieuwpoort, Jos W R Twisk, Leopold M G Curfs, Paul Lips, Madeleine L Drent
Background: In patients with Prader-Willi syndrome (PWS) body composition is abnormal and alterations in appetite regulating factors, bone mineral density and insulin-like growth factor-1 (IGF-1) levels have been described. Studies in PWS adults are limited. In this study, we investigated body composition, appetite regulating peptides, bone mineral density and markers of bone remodeling in an adult PWS population. Furthermore, we investigated the association between these different parameters and IGF-1 levels because of the described similarities with growth hormone deficient patients...
2018: International Journal of Pediatric Endocrinology
https://www.readbyqxmd.com/read/29360068/-variation-analysis-of-the-number-of-copies-and-methylene-patterns-in-region-15q11-q13
#14
Sergio Laurito, María Roqué
Human chromosome 15q11-q13 region is prone to suffer genetic alterations. Some genes of this region have a differential monoallelic imprinting-regulated expression pattern. Defects in imprinting regulation (IE), uniparental disomy (UPD) or copy number variation (CNV) due to chromosomal breakpoints (BP) in 15q11-q13 region, are associated with several diseases. The most frequent are Prader-Willi syndrome, Angelman syndrome and 15q11-q13 microduplication syndrome. In this work, we analyzed DNA samples from 181 patients with phenotypes which were compatible with the above-mentioned diseases, using Methyl specific-multiplex ligation-dependent probe amplification (MS-MLPA)...
2018: Medicina
https://www.readbyqxmd.com/read/29359444/three-patients-with-schaaf-yang-syndrome-exhibiting-arthrogryposis-and-endocrinological-abnormalities
#15
Takuji Enya, Nobuhiko Okamoto, Yoshinori Iba, Tomoki Miyazawa, Mitsuru Okada, Shinobu Ida, Takuya Naruto, Issei Imoto, Atsushi Fujita, Noriko Miyake, Naomichi Matsumoto, Keisuke Sugimoto, Tsukasa Takemura
MAGEL2 is the paternally expressed gene within Prader-Willi syndrome critical region at 15q11.2. We encountered three individuals in whom truncating mutations of MAGEL2 were identified. Patients 1 and 2, siblings born to healthy, non-consanguineous Japanese parents, showed generalized hypotonia, lethargy, severe respiratory difficulty, poor feeding, and multiple anomalies including arthrogryposis soon after birth. We carried out whole-exome sequencing, which detected a MAGEL2 mutation (c.1912C>T, p.Gln638*, heterozygous)...
January 23, 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29353451/analysis-of-circulating-mediators-of-bone-remodeling-in-prader-willi-syndrome
#16
G Brunetti, G Grugni, L Piacente, M Delvecchio, A Ventura, P Giordano, M Grano, G D'Amato, D Laforgia, A Crinò, M F Faienza
We tested the hypothesis that the levels of bone remodeling mediators may be altered in Prader-Willi syndrome (PWS). We assessed RANKL, OPG, sclerostin, DKK-1 serum levels, and bone metabolism markers in 12 PWS children (7.8 ± 4.3 years), 14 PWS adults (29.5 ± 7.2 years), and 31 healthy controls matched for sex and age. Instrumental parameters of bone mineral density (BMD) were also evaluated. Lumbar spine BMD Z-scores were reduced in PWS children (P < 0.01), reaching osteopenic levels in PWS adults...
January 20, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29352661/mechanistic-insights-into-the-genetics-of-affective-psychosis-from-prader-willi-syndrome
#17
REVIEW
Lucie C S Aman, Katherine E Manning, Joyce E Whittington, Anthony J Holland
Schizophrenia and bipolar disorder are common, severe, and disabling psychotic disorders, which are difficult to research. We argue that the genetically determined neurodevelopmental disorder Prader-Willi syndrome (PWS), which is associated with a high risk of affective psychotic illness, can provide a window into genetic mechanisms and associated neural pathways. People with PWS can all show non-psychotic psychopathology and problem behaviours, but the prevalence of psychotic illness differs markedly by genetic subtype; people with PWS due to chromosome 15 maternal uniparental disomy have higher prevalence of psychotic illness compared with patients with PWS due to 15q11-13 deletions of paternal origin...
January 15, 2018: Lancet Psychiatry
https://www.readbyqxmd.com/read/29343559/a-genetic-locus-for-paranoia
#18
Bernard Crespi, Silven Read, Iiro Salminen, Peter Hurd
The psychological effects of brain-expressed imprinted genes in humans are virtually unknown. Prader-Willi syndrome (PWS) is a neurogenetic condition mediated by genomic imprinting, which involves high rates of psychosis characterized by hallucinations and paranoia, as well as autism. Altered expression of two brain-expressed imprinted genes, MAGEL2 and NDN, mediates a suite of PWS-related phenotypes, including behaviour, in mice. We phenotyped a large population of typical individuals for schizophrenia-spectrum and autism-spectrum traits, and genotyped them for the single-nucleotide polymorphism rs850807, which is putatively functional and linked with MAGEL2 and NDN Genetic variation in rs850807 was strongly and exclusively associated with the ideas of reference subscale of the schizophrenia spectrum, which is best typified as paranoia...
January 2018: Biology Letters
https://www.readbyqxmd.com/read/29335890/effectiveness-of-sodium-glucose-cotransporter-2-inhibitor-as-an-add-on-drug-to-glp-1-receptor-agonists-for-glycemic-control-of-a-patient-with-prader-willi-syndrome-a-case-report
#19
Yukio Horikawa, Mayumi Enya, Makie Komagata, Ken-Ichi Hashimoto, Masayo Kagami, Maki Fukami, Jun Takeda
INTRODUCTION: Diabetes patients with Prader-Willi syndrome (PWS) are obese because of hyperphagia; weight control by dietary modification and medicine is required for glycemic control. There are several recent reports showing the effectiveness of GLP-1 receptor agonists (GLP-1RAs) for diabetes treatment in PWS. CASE REPORT: A 36-year-old Japanese male patient was diagnosed with PWS at 10 years of age. At age 16 years, he was diagnosed with diabetes and began to take several kinds of oral hypoglycemic agents...
January 15, 2018: Diabetes Therapy: Research, Treatment and Education of Diabetes and related Disorders
https://www.readbyqxmd.com/read/29324255/aberrant-autistic-and-food-related-behaviors-in-adults-with-prader-willi-syndrome-the-comparison-between-young-adults-and-adults
#20
Hiroyuki Ogata, Hiroshi Ihara, Masao Gito, Masayuki Sayama, Nobuyuki Murakami, Tadayuki Ayabe, Yuji Oto, Toshiro Nagai, Kazutaka Shimoda
This study aims to explore the differences of age as well as genotype in regards to the severity of behavioral symptoms in Prader-Willi syndrome (PWS), with emphasis on the comparison between youngadults and adults.The Food Related Problem Questionnaire (FRPQ), the Aberrant Behavior Checklist Japanese Version (ABC-J), and the Pervasive Developmental Disorders Autism Society Japan Rating Scale (PARS) were administered to 46 PWS patients, including 33 young adults (ages 18-28) and 13 adults(ages 30-45). To examine the differences between young adults and adults, Mann-Whitney U tests were conducted...
January 8, 2018: Research in Developmental Disabilities
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