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https://www.readbyqxmd.com/read/28229514/mutations-in-genes-encoding-polycomb-repressive-complex-2-subunits-cause-weaver-syndrome
#1
Eri Imagawa, Ken Higashimoto, Yasunari Sakai, Chikahiko Numakura, Nobuhiko Okamoto, Satoko Matsunaga, Akihide Ryo, Yoshinori Sato, Masafumi Sanefuji, Kenji Ihara, Yui Takada, Gen Nishimura, Hirotomo Saitsu, Takeshi Mizuguchi, Satoko Miyatake, Mitsuko Nakashima, Noriko Miyake, Hidenobu Soejima, Naomichi Matsumoto
Weaver syndrome is a rare congenital overgrowth disorder caused by heterozygous mutations in EZH2 (enhancer of zeste homolog 2) or EED (embryonic ectoderm development). EZH2 and EED are core components of the polycomb repressive complex 2 (PRC2), which possesses histone methyltransferase activity and catalyzes trimethylation of histone H3 at lysine 27. Here, we analyzed eight probands with clinically suspected Weaver syndrome by whole exome sequencing and identified three mutations: a 25.4-kb deletion partially involving EZH2 and CUL1 (individual 1), a missense mutation (c...
February 22, 2017: Human Mutation
https://www.readbyqxmd.com/read/28229249/adcy5-related-dyskinesia-presenting-as-familial-myoclonus-dystonia
#2
Andrew G L Douglas, Gaia Andreoletti, Kevin Talbot, Simon R Hammans, Jaspal Singh, Andrea Whitney, Sarah Ennis, Nicola C Foulds
We describe a family with an autosomal dominant familial dyskinesia resembling myoclonus-dystonia associated with a novel missense mutation in ADCY5, found through whole-exome sequencing. A tiered analytical approach was used to analyse whole-exome sequencing data from an affected grandmother-granddaughter pair. Whole-exome sequencing identified 18,000 shared variants, of which 46 were non-synonymous changes not present in a local cohort of control exomes (n = 422). Further filtering based on predicted splicing effect, minor allele frequency in the 1000 Genomes Project and on phylogenetic conservation yielded 13 candidate variants, of which the heterozygous missense mutation c...
February 22, 2017: Neurogenetics
https://www.readbyqxmd.com/read/28223721/current-and-future-therapies-for-inherited-cholestatic-liver-diseases
#3
REVIEW
Wendy L van der Woerd, Roderick Hj Houwen, Stan Fj van de Graaf
Familial intrahepatic cholestasis (FIC) comprises a group of rare cholestatic liver diseases associated with canalicular transport defects resulting predominantly from mutations in ATP8B1, ABCB11 and ABCB4. Phenotypes range from benign recurrent intrahepatic cholestasis (BRIC), associated with recurrent cholestatic attacks, to progressive FIC (PFIC). Patients often suffer from severe pruritus and eventually progressive cholestasis results in liver failure. Currently, first-line treatment includes ursodeoxycholic acid in patients with ABCB4 deficiency (PFIC3) and partial biliary diversion in patients with ATP8B1 or ABCB11 deficiency (PFIC1 and PFIC2)...
February 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28223669/-diagnosis-and-treatment-of-hboc-syndrome-by-a-breast-surgical-oncologist
#4
Kumiko Kida, Michiko Murai, Hideko Yamauchi
Of all breast cancer cases, 5-10% occur because of inherited germline mutation. For hereditary breast and ovarian cancer (HBOC)syndrome, congenital knowledge and strategies for breast cancer treatment and risk reduction are necessary. Regarding the surgical procedure for the cancer site, the ipsilateral breast tumor recurrence rate following breast-conserving surgery in breast cancers with BRCA1/2 mutation is not significantly higher than that in sporadic breast cancers. In addition, prognosis did not differ according to surgical methods...
February 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28223667/-molecular-diagnosis-and-treatment-of-hboc-syndrome
#5
Yoshio Miki
Hereditary breast and ovarian cancer(HBOC)is an inherited cancer caused by mutations of the BRCA1 or BRCA2 genes. BRCA genetic testing is used for HBOC diagnosis and continues to progress such as the annotation of VUS. In HBOC clinical practice, surveillance methods have been established through collaboration between genetic medicine and cancer medicine, and treatment, including options based on genetic diagnosis, has advanced significantly. Furthermore, the analysis of BRCA1 and BRCA2 function has progressed, and a novel therapeutic method based on synthetic lethality, such as a PARP inhibitor use, has been developed...
February 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28223188/next-generation-sequencing-unravels-homozygous-mutation-in-glucose-6-phosphate-isomerase-gpic-1040g-a-p-arg347his-causing-hemolysis-in-an-indian-infant
#6
Manu Jamwal, Anu Aggarwal, Anirban Das, Arindam Maitra, Prashant Sharma, Shekhar Krishnan, Neeraj Arora, Deepak Bansal, Reena Das
INTRODUCTION: Inherited anemias diagnostic workup requires a step-wise algorithm. Causal genes implicated in congenital hemolytic anemia are numerous, making a gene-by-gene approach by Sanger sequencing time consuming, expensive and labour intensive. Targeted resequencing can be of great use in explaining these cases. METHODOLOGY: Six months female presented with neonatal jaundice and negative family history. Clinical and laboratory evidences were suggestive of hemolytic anemia...
February 20, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28222800/exome-sequencing-identifies-slc26a4-gjb2-scarb2-and-duox2-mutations-in-2-siblings-with-pendred-syndrome-in-a-malaysian-family
#7
Yock-Ping Chow, Nor Azian Abdul Murad, Zamzureena Mohd Rani, Jia-Shiun Khoo, Pei-Sin Chong, Loo-Ling Wu, Rahman Jamal
BACKGROUND: Pendred syndrome (PDS, MIM #274600) is an autosomal recessive disorder characterized by congenital sensorineural hearing loss and goiter. In this study, we describing the possible PDS causal mutations in a Malaysian family with 2 daughters diagnosed with bilateral hearing loss and hypothyroidism. METHODS AND RESULTS: Whole exome sequencing was performed on 2 sisters with PDS and their unaffected parents. Our results showed that both sisters inherited monoallelic mutations in the 2 known PDS genes, SLC26A4 (ENST00000265715:c...
February 21, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28220990/oxidative-stress-serotonergic-changes-and-decreased-ultrasonic-vocalizations-in-a-mouse-model-of-smith-lemli-opitz-syndrome
#8
Navila F Sharif, Zeljka Korade, Ned A Porter, Harrison Fiona E
Smith Lemli Opitz syndrome is an inherited monogenic disorder in which mutations to the Dhcr7 gene lead to deficits in cholesterol synthesis. As a result, many patients suffer from gross physiological and neurological deficits. The purpose of this study was to identify a potential abnormal behavioral phenotype in a compound mutant mouse model for Smith Lemli Opitz disease (Dhcr7(Δ3)(-5/)(T93M) ) to further validate the model, and to provide potential targets for future therapeutic interventions. We also sought to identify some of the underlying changes in brain function that may be responsible for behavioral differences among groups...
February 21, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/28220744/burden-genotype-and-phenotype-profiles-of-adult-patients-with-sickle-cell-disease-in-cape-town-south-africa
#9
G D Pule, K Mnica, M Joubert, S Mowla, N Novitsky, A Wonkam
BACKGROUND: An exponential increase in the number of sickle cell disease (SCD) patients in paediatric services in Cape Town, South Africa, has been reported. The trend in adult/adolescent services has not been investigated. OBJECTIVES: To evaluate epidemiological trends of SCD and the profile of patients affected by SCD attending the Haematology Clinic at Groote Schuur Hospital (GSH), Cape Town. METHODS: (i) A retrospective review of the number of SCD patients over the past 20 years; (ii) a cross-sectional analysis of clinical and haematological characteristics of SCD patients; and (iii) molecular analysis of the haemoglobin S mutation, the haplotype in the β-globin-like genes cluster, the 3...
January 30, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28220606/lamarck-rises-from-his-grave-parental-environment-induced-epigenetic-inheritance-in-model-organisms-and-humans
#10
Yan Wang, Huijie Liu, Zhongsheng Sun
Organisms can change their physiological/behavioural traits to adapt and survive in changed environments. However, whether these acquired traits can be inherited across generations through non-genetic alterations has been a topic of debate for over a century. Emerging evidence indicates that both ancestral and parental experiences, including nutrition, environmental toxins, nurturing behaviour, and social stress, can have powerful effects on the physiological, metabolic and cellular functions in an organism...
February 20, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28220527/recessive-mypn-mutations-cause-cap-myopathy-with-occasional-nemaline-rods
#11
Xavière Lornage, Edoardo Malfatti, Chrystel Chéraud, Raphaël Schneider, Valérie Biancalana, Jean-Marie Cuisset, Matteo Garibaldi, Bruno Eymard, Michel Fardeau, Anne Boland, Jean-François Deleuze, Julie Thompson, Robert-Yves Carlier, Johann Böhm, Norma B Romero, Jocelyn Laporte
Congenital myopathies are phenotypically and genetically heterogeneous. We describe homozygous truncating mutations in MYPN in 2 unrelated families with a slowly progressive congenital cap myopathy. MYPN encodes the Z-line protein myopalladin implicated in sarcomere integrity. Functional experiments demonstrate that the mutations lead to mRNA defects and to a strong reduction in full-length protein expression. Myopalladin signals accumulate in the caps together with alpha-actinin. Dominant MYPN mutations were previously reported in cardiomyopathies...
February 21, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28220263/characterization-and-outcome-of-41-patients-with-beta-ketothiolase-deficiency-10%C3%A2-years-experience-of-a-medical-center-in-northern-vietnam
#12
Khanh Ngoc Nguyen, Elsayed Abdelkreem, Roberto Colombo, Yuki Hasegawa, Ngoc Thi Bich Can, Thao Phuong Bui, Hai Thanh Le, Mai Thi Chi Tran, Hoan Thi Nguyen, Hung Thanh Trinh, Yuka Aoyama, Hideo Sasai, Seiji Yamaguchi, Toshiyuki Fukao, Dung Chi Vu
Beta-ketothiolase (T2) deficiency is an inherited disease of isoleucine and ketone body metabolism caused by mutations in the ACAT1 gene. Between 2005 and 2016, a total of 41 patients with T2 deficiency were identified at a medical center in northern Vietnam, with an estimated incidence of one in 190,000 newborns. Most patients manifested ketoacidotic episodes of varying severity between 6 and 18 months of age. Remarkably, 28% of patients showed high blood glucose levels (up to 23.3 mmol/L). Ketoacidotic episodes recurred in 43% of patients...
February 20, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28218389/confirming-the-recessive-inheritance-of-scn1b-mutations-in-developmental-epileptic-encephalopathy
#13
Wafaa Ramadan, Nisha Patel, Shamsa Anazi, Amal Y Kentab, Fahad A Bashiri, Muddathir H Hamad, Lamya Jad, Mustafa A Salih, Hessa Alsaif, Mais Hashem, Eissa Faqeih, Hanan E Shamseddin, Fowzan S Alkuraya
Dominant SCN1B mutations are known to cause several epilepsy syndromes in humans. Only two epilepsy patients to date have been reported to have recessive mutations in SCN1B as the likely cause of their phenotype. Here, we confirm the recessive inheritance of two novel SCN1B mutations in five children from three families with developmental epileptic encephalopathy. The recessive inheritance and early death in these patients is consistent with the Dravet-like phenotype observed in Scn1b(-/-) mice. The "negative" clinical exome in one of these families highlight the need to consider recessive mutations in the interpretation of variants in typically dominant genes...
February 20, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28216058/sca13-causes-dominantly-inherited-non-progressive-myoclonus-ataxia
#14
Solveig Montaut, Emmanuelle Apartis, Jean-Baptiste Chanson, Claire Ewenczyk, Mathilde Renaud, Claire Guissart, Jean Muller, André Pierre Legrand, Alexandra Durr, Vincent Laugel, Michel Koenig, Christine Tranchant, Mathieu Anheim
INTRODUCTION: Spinocerebellar ataxia 13 (SCA13) is a rare autosomal dominant cerebellar ataxia. To our knowledge, its association to movement disorders has never been described. We aimed at reporting 8 new SCA13 cases with a focus on movement disorders especially myoclonus. METHODS: We performed a detailed neurological examination and neurophysiological recording in 8 patients consecutively diagnosed with SCA13 between December 2013 and October 2015 and followed up in two French tertiary centers...
February 11, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28215760/two-novel-cases-of-compound-heterozygous-mutations-in-mitofusin2-finding-out-the-inheritance
#15
Alessandro Geroldi, Patrizia Lastella, Margherita Patruno, Fabio Gotta, Nicoletta Resta, Grazia Devigili, Carlo Sabbà, Rossella Gulli, Merit Lamp, Paola Origone, Paola Mandich, Emilia Bellone
MFN2 is the major gene involved in the axonal form of Charcot-Marie-Tooth disease. It usually has an autosomal dominant pattern of inheritance, but a few cases of homozygous or compound heterozygous mutations have been described. These patients usually present an earlier onset, more severe phenotype and their inheritance pattern can span from autosomal recessive to semidominant. Here we report two unrelated patients carrying two compound heterozygous MFN2 mutations. Both present a pure axonal neuropathy without any additional features...
January 17, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28214786/cost-effectiveness-of-risk-reducing-surgeries-in-preventing-hereditary-breast-and-ovarian-cancer
#16
Michael G Schrauder, Lisa Brunel-Geuder, Lothar Häberle, Marius Wunderle, Juliane Hoyer, André Reis, Rüdiger Schulz-Wendtland, Matthias W Beckmann, Michael P Lux
OBJECTIVES: Risk-reducing surgeries are a feasible option for mitigating the risk in individuals with inherited susceptibility to cancer, but are the procedures cost-effective in the current health-care system in Germany? This study compared the health-care costs for bilateral risk-reducing mastectomy (BRRM) and risk-reducing (bilateral) salpingo-oophorectomy (RRSO) with cancer treatment costs that could potentially be prevented. PATIENTS AND METHODS: The analysis is based on interdisciplinary consultations with individuals with a high familial risk for breast and ovarian cancer at the University Breast Center for Franconia (Germany) between 2009 and 2013 (370 consultations; 44 patients with BRCA1 mutations and 26 with BRCA2 mutations)...
February 16, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/28214152/clinical-and-genetic-diagnosis-of-familial-hypertrophic-cardiomyopathy-results-in-pediatric-cardiology
#17
Bárbara Cardoso, Inês Gomes, Petra Loureiro, Conceição Trigo, Fátima Ferreira Pinto
INTRODUCTION: Hypertrophic cardiomyopathy (HCM) is most often of autosomal dominant inheritance with incomplete penetrance and variable expression. The main purpose of family screening is to identify relatives with unrecognized HCM and to monitor those at risk for disease, in order to minimize complications and to assess risk of sudden cardiac death. The ESC and ACCF/AHA guidelines on the diagnosis and management of HCM recommend the screening of child relatives from the age of 10-12 years...
February 14, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28213671/exome-analysis-of-smith-magenis-like-syndrome-cohort-identifies-de-novo-likely-pathogenic-variants
#18
Seth I Berger, Carla Ciccone, Karen L Simon, May Christine Malicdan, Thierry Vilboux, Charles Billington, Roxanne Fischer, Wendy J Introne, Andrea Gropman, Jan K Blancato, James C Mullikin, William A Gahl, Marjan Huizing, Ann C M Smith
Smith-Magenis syndrome (SMS), a neurodevelopmental disorder characterized by dysmorphic features, intellectual disability (ID), and sleep disturbances, results from a 17p11.2 microdeletion or a mutation in the RAI1 gene. We performed exome sequencing on 6 patients with SMS-like phenotypes but without chromosomal abnormalities or RAI1 variants. We identified pathogenic de novo variants in two cases, a nonsense variant in IQSEC2 and a missense variant in the SAND domain of DEAF1, and candidate de novo missense variants in an additional two cases...
February 17, 2017: Human Genetics
https://www.readbyqxmd.com/read/28213160/molecular-pathogenesis-of-peripheral-neuropathies-insights-from-drosophila-models
#19
REVIEW
Julia Bussmann, Erik Storkebaum
Peripheral neuropathies are characterized by degeneration of peripheral motor, sensory and/or autonomic axons, leading to progressive distal muscle weakness, sensory deficits and/or autonomic dysfunction. Acquired peripheral neuropathies, e.g., as a side effect of chemotherapy, are distinguished from inherited peripheral neuropathies (IPNs). Drosophila models for chemotherapy-induced peripheral neuropathy and several IPNs have provided novel insight into the molecular mechanisms underlying axonal degeneration...
February 14, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28213088/personalized-medicine-genetic-risk-prediction-of-drug-response
#20
REVIEW
Ge Zhang, Daniel W Nebert
Pharmacogenomics (PGx), a substantial component of "personalized medicine", seeks to understand each individual's genetic composition to optimize drug therapy -- maximizing beneficial drug response, while minimizing adverse drug reactions (ADRs). Drug responses are highly variable because innumerable factors contribute to ultimate phenotypic outcomes. Recent genome-wide PGx studies have provided some insight into genetic basis of variability in drug response. These can be grouped into three categories. [a] Monogenic (Mendelian) traits include early examples mostly of inherited disorders, and some severe (idiosyncratic) ADRs typically influenced by single rare coding variants...
February 14, 2017: Pharmacology & Therapeutics
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