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European Journal of Medical Genetics

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https://www.readbyqxmd.com/read/28818479/a-structured-assessment-of-motor-function-behavior-and-communication-in-patients-with-wolf-hirschhorn-syndrome
#1
Heidi E Nag, David K Bergsaker, Bente S Hunn, Susanne Schmidt, Lise B Hoxmark
The present study aimed to increase the knowledge about Wolf-Hirschhorn syndrome (WHS), especially concerning motor function, autism spectrum disorders (ASD), and adapted behavior, but also regarding clinical symptoms in general. Motor function was evaluated via systematic observation. Standardized assessments such as the Vineland Adapted Behavior Scales II (VABS II), the Social Communication Questionnaire (SCQ), and the Child Behavior Checklist (CBCL) or Adult Behavior Checklist (ABCL) were used for the behavioral assessment...
August 14, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28818478/mutations-in-ddhd1-encoding-a-phospholipase-a1-is-a-novel-cause-of-retinopathy-and-neurodegeneration-with-brain-iron-accumulation
#2
Rodolphe Dard, Claire Meyniel, Valérie Touitou, Giovanni Stevanin, Foudil Lamari, Alexandra Durr, Claire Ewenczyk, Fanny Mochel
Defects of phospholipids remodelling and synthesis are inborn errors of metabolism responsible for various clinical presentations including spastic paraplegia, retinopathy, optic atrophy, myo- and cardiomyopathies, and osteo-cutaneous manifestations. DDHD1 encodes a phospholipase A1, which is involved in the remodelling of phospholipids. We previously described a relatively pure hereditary spastic paraplegia (HSP) phenotype associated with mutations in DDHD1. Here we report a complex form of HSP associated with retinal dystrophy and a pattern of neurodegeneration with brain iron accumulation (NBIA) on brain MRI, due to a novel homozygous mutation in DDHD1...
August 14, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28818477/human-imprinting-disorders-principles-practice-problems-and-progress
#3
REVIEW
Deborah J G Mackay
Epigenetic regulation orchestrates gene expression with exquisite precision, over a huge dynamic range and across developmental space and time, permitting genomically-homogeneous humans to develop and adapt to their surroundings. Every generation, these epigenetic marks are re-set twice: in the germline, to enable differentiation of sperm and eggs, and at fertilisation, to create the totipotent zygote that then begins growth and differentiation into a new human. A small group of genes evades the second, zygotic wave of epigenetic reprogramming, and these genes retain an epigenetic 'imprint' of the parent from whom they were inherited...
August 14, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28811189/early-fetal-presentation-of-koolen-de-vries-case-report-with-literature-review
#4
LETTER
Fanny Sauvestre, Florent Marguet, Caroline Rooryck, Marie-Laure Vuillaume, Frédéric Cardinaud, Annie Laquerrière, Gwenaëlle André, Fanny Pelluard
Koolen-de Vries syndrome (MIM#610443) is a rare microdeletion syndrome involving the 17q21.31 region, which was first described by Koolen in 2006. Clinical and behavioral characteristics have been extensively reported from more than 100 postnatal cases including infants, children and young adults. The syndrome is highly clinically heterogeneous, but the main features associate characteristic cranio-facial dysmorphism, heart defects, limb, skeletal, genito-urinary anomalies, along with intellectual disability with early childhood epilepsy and behavioral disturbances...
August 12, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28811188/familial-1p36-3-microduplication-resulting-from-a-1p-9q-non-reciprocal-translocation
#5
Valentine Marquet, Sylvie Bourthoumieu, Amelia Dobrescu, Cécile Laroche-Raynaud, Catherine Yardin
Unlike the 1p36 microdeletion syndrome, which has been extensively described, 1p36 microduplications have rarely been reported. We describe a three years old boy presenting with a severe global developmental delay and a few dysmorphic features. Cytogenetic analyses revealed a maternally inherited 3.35 Mb microduplication of chromosomal band 1p36.3. The maternal grand-father is also carrier of the same chromosomal rearrangement. Interestingly, the duplicated 1p36.3 segment was found to be localized at the telomeric end of the long arms of a chromosome 9, probably deriving from a 1p36...
August 12, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807869/a-novel-mutation-in-smoc1-and-variable-phenotypic-expression-in-two-patients-with-waardenburg-anophthalmia-syndrome
#6
Javad Jamshidi, Shokoufeh Abdollahi, Hamid Ghaedi, Elham Alehabib, Abbas Tafakhori, Somayeh Alinaghi, Marjan Chapi, Amir Hossein Johari, Hossein Darvish
Waardenburg anophthalmia syndrome (WAS) is a rare disorder that mostly affects the eyes and distal limbs. In the current study we reported two Iranian patients with WAS. The first case was a 26-year-old girl with unilateral anophthalmia, bilateral camptodactyly and clinodactyly in her hands, oligodactly in her left foot and syndactyly of the second to fifth toes in her right foot. She also had severe hearing loss in both ears. The second case was a 12-year-old boy with bilateral anophthalmia, camptodactyly in his right hand, oligodactyly in his foot, clubfoot, and cryptorchidism...
August 12, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807868/response-to-in-silico-prediction-is-insufficient-to-assess-pathogenicity-of-mtdna-variants
#7
LETTER
Mafalda Bacalhau, Maria J Santos, Manuela Grazina, João Pratas, Marta Simões, Cândida Mendes, Carolina Ribeiro, Luisa Diogo, Maria Carmo Macário
No abstract text is available yet for this article.
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807867/impairment-of-different-protein-domains-causes-variable-clinical-presentation-within-pitt-hopkins-syndrome-and-suggests-intragenic-molecular-syndromology-of-tcf4
#8
Maria Francesca Bedeschi, Giuseppe Marangi, Maria Rosaria Calvello, Stefania Ricciardi, Francesca Pia Chiara Leone, Marco Baccarin, Silvana Guerneri, Daniela Orteschi, Marina Murdolo, Serena Lattante, Silvia Frangella, Beth Keena, Margaret H Harr, Elaine Zackai, Marcella Zollino
Pitt-Hopkins syndrome is a neurodevelopmental disorder characterized by severe intellectual disability and a distinctive facial gestalt. It is caused by haploinsufficiency of the TCF4 gene. The TCF4 protein has different functional domains, with the NLS (nuclear localization signal) domain coded by exons 7-8 and the bHLH (basic Helix-Loop-Helix) domain coded by exon 18. Several alternatively spliced TCF4 variants have been described, allowing for translation of variable protein isoforms. Typical PTHS patients have impairment of at least the bHLH domain...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807866/brca1-2-missense-mutations-and-the-value-of-in-silico-analyses
#9
Carolin E Sadowski, Daniela Kohlstedt, Cornelia Meisel, Katja Keller, Kerstin Becker, Luisa Mackenroth, Andreas Rump, Evelin Schröck, Pauline Wimberger, Karin Kast
INTRODUCTION: The clinical implications of genetic variants in BRCA1/2 in healthy and affected individuals are considerable. Variant interpretation, however, is especially challenging for missense variants. The majority of them are classified as variants of unknown clinical significance (VUS). Computational (in-silico) predictive programs are easy to access, but represent only one tool out of a wide range of complemental approaches to classify VUS. With this single-center study, we aimed to evaluate the impact of in-silico analyses in a spectrum of different BRCA1/2 missense variants...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807865/novel-compound-heterozygous-mutations-identified-by-whole-exome-sequencing-in-a-japanese-patient-with-geroderma-osteodysplastica
#10
Ryojun Takeda, Masaki Takagi, Hiroyuki Shinohara, Hiroshi Futagawa, Satoshi Narumi, Tomonobu Hasegawa, Gen Nishimura, Hiroshi Yoshihashi
Geroderma osteodysplastica (GO) is a subtype of cutis laxa syndrome characterized by congenital wrinkly skin, a prematurely aged face, extremely short stature, and osteoporosis leading to recurrent fractures. GO exhibits an autosomal recessive inheritance pattern and is caused by loss-of-function mutations in GORAB, which encodes a protein important for Golgi-related transport. Using whole exome sequencing, we identified novel compound heterozygous nonsense mutations in the GORAB in a GO patient. The patient was a 14-year-old Japanese boy...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807864/reducing-diagnostic-turnaround-times-of-exome-sequencing-for-families-requiring-timely-diagnoses
#11
Aurélie Bourchany, Christel Thauvin-Robinet, Daphné Lehalle, Ange-Line Bruel, Alice Masurel-Paulet, Nolwenn Jean, Sophie Nambot, Marjorie Willems, Laetitia Lambert, Salima El Chehadeh-Djebbar, Elise Schaefer, Aurélia Jaquette, Judith St-Onge, Charlotte Poe, Thibaud Jouan, Martin Chevarin, Patrick Callier, Anne-Laure Mosca-Boidron, Nicole Laurent, Mathilde Lefebvre, Frédéric Huet, Nada Houcinat, Sébastien Moutton, Christophe Philippe, Frédéric Tran-Mau-Them, Antonio Vitobello, Paul Kuentz, Yannis Duffourd, Jean-Baptiste Rivière, Julien Thevenon, Laurence Faivre
BACKGROUND AND OBJECTIVE: Whole-exome sequencing (WES) has now entered medical practice with powerful applications in the diagnosis of rare Mendelian disorders. Although the usefulness and cost-effectiveness of WES have been widely demonstrated, it is essential to reduce the diagnostic turnaround time to make WES a first-line procedure. Since 2011, the automation of laboratory procedures and advances in sequencing chemistry have made it possible to carry out diagnostic whole genome sequencing from the blood sample to molecular diagnosis of suspected genetic disorders within 50 h...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807863/prenatal-diagnosis-of-complex-phenotype-in-a-13-week-old-fetus-with-an-interstitial-multigene-deletion-20q13-13-q13-2-by-chromosomal-microarray
#12
Feodora Stipoljev, Danka Miric-Tesanic, Tomislav Hafner, Maja Barbalic, Monika Logara, Ruzica Lasan-Trcic, Ana Vicic, Romana Gjergja-Juraski
We report the first trimester three-dimensional ultrasonographic findings in a 13-week-old fetus with complex phenotype and a de novo 4.7 Mb multigene deletion encompassing chromosome region 20q13.13-q13.2 detected by chromosomal microarray. Fetal sonography detected radial-ray anomalies in the form of bilateral absence of thumbs and the left club hand deformity. The presence of single atrioventricular canal instead of the atrial septal defect typical for Holt-Oram syndrome pointed us to rather suspect the SALL4 related diseases...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807862/comment-to-the-manuscript-by-bacalhau-et-al-on-in-silico-prediction-is-insufficient-to-assess-pathogenicity-of-mtdna-variants
#13
LETTER
Josef Finsterer, Sinda Zarrouk-Mahjoub
No abstract text is available yet for this article.
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807762/diagnostic-exome-sequencing-identifies-a-heterozygous-mbd5-frameshift-mutation-in-a-family-with-intellectual-disability-and-epilepsy
#14
Ji Yoon Han, In Goo Lee, Woori Jang, Myungshin Kim, Yonggoo Kim, Ja Hyun Jang, Joonhong Park
Methyl-CpG-binding domain 5 (MBD5)-associated neurodevelopmental disorder caused by 2q23.1 or MBD5-specific mutation has been recently identified as a genetic disorder associated with autism spectrum disorders. Phenotypic features of 2q23.1 deletion or disruption of MBD5 gene include severe intellectual disability, seizure, significant speech impairment, sleep disturbance, and autistic-like behavioural problems. Here we report a 7-year-old girl with intellectual disability and epilepsy without previous clinical diagnosis...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28803024/a-comparison-of-splicing-assays-to-detect-an-intronic-variant-of-the-ocrl-gene-in-lowe-syndrome
#15
Keita Nakanishi, Kandai Nozu, Ryugo Hiramoto, Shogo Minamikawa, Tomohiko Yamamura, Junya Fujimura, Tomoko Horinouchi, Takeshi Ninchoji, Hiroshi Kaito, Naoya Morisada, Shingo Ishimori, Koichi Nakanishi, Ichiro Morioka, Hiroyuki Awano, Masafumi Matsuo, Kazumoto Iijima
Lowe syndrome is an X-linked inherited disorder diagnosed by congenital cataracts, intellectual impairment, and renal tubular dysfunction. It is caused by pathogenic variants of the oculocerebrorenal syndrome of Lowe gene (OCRL), of which more than 250 have been reported so far. Around 30 of these variants are intronic nucleotide changes; however, to show the pathogenicity of these variants is usually laborious. In this report, we conducted genetic testing of a patient clinically diagnosed with Lowe syndrome to detect the presence of OCRL variants...
August 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28779995/letter-regarding-the-article-multiple-habp2-variants-in-familial-papillary-thyroid-carcinoma-contribution-of-a-group-of-thyroid-checked-controls-by-kern-et-al
#16
LETTER
Carla Colombo, Laura Fugazzola, Marina Muzza, Maria Carla Proverbio, Valentina Cirello
This Journal recently published a study (Kern et al., 2017) reporting the genetic analysis of the whole HABP2 gene in 11 independent kindreds with familial non medullary thyroid cancer (FNMTC). The Authors showed that a new variant (p.R122W) displayed a minor allele frequency (MAF) significantly higher in FNMTC patients than in controls (7.5 vs 0.73%, p = 0.016) and cosegregated with thyroid cancer in one kindred, thus suggesting the need for the evaluation of its possible pathogenicity in other series. We thus analyzed this new HABP2 p...
August 2, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28778789/a-de-novo-mosaic-mutation-in-spast-with-two-novel-alternative-alleles-and-chromosomal-copy-number-variant-in-a-boy-with-spastic-paraplegia-and-autism-spectrum-disorder
#17
A M Matthews, M Tarailo-Graovac, E M Price, I Blydt-Hansen, A Ghani, B I Drögemöller, W P Robinson, C J Ross, W W Wasserman, H Siden, C D van Karnebeek
Here we report a 12 year old male with an extreme presentation of spastic paraplegia along with autism and dysmorphisms. Whole exome sequencing identified a predicted pathogenic pair of missense variants in SPAST at the same chromosomal location, each with a different alternative allele, while a chromosome microarray identified a 1.73 Mb paternally inherited copy gain of 1q21.1q21.2 resulting in a blended phenotype of both Spastic paraplegia 4 and 1q21.1 microduplication syndrome. We believe that the extreme phenotype observed is likely caused by the presence of cells which contain only mutant SPAST, but that the viability of the patient is possible due mosaicism of mutant alleles observed in different proportions across tissues...
August 1, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28778788/novel-mutations-in-serac1-gene-in-two-indian-patients-presenting-with-dystonia-and-intellectual-disability
#18
LETTER
Radha Rama Devi A, Lokesh Lingappa
In this study we present the first two cases from India of a rare inborn error of metabolism manifesting as dystonia and 3-methylglutaconic aciduria and a Leigh like lesions in the brain MRI associated with SERAC1 gene mutation, a phenotype characteristic of MEGDEL syndrome. A four base pair duplication in exon 15 i.e.NM_032861.3 (SERAC1) c. 1643_1646 dup ATCT (p.(Leu550SerfsX19)) and another with a homozygous missense variation in exon 15 i.e. NM_032861.3 (SERAC1) c.1709 G > A (p.(Gly526Glu)) were detected and both were novel mutations...
August 1, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28778787/exome-sequence-identified-a-c-320a%C3%A2-%C3%A2-g-alg13-variant-in-a-female-with-infantile-epileptic-encephalopathy-with-normal-glycosylation-and-random-x-inactivation-review-of-the-literature
#19
Sana Hamici, Fatma Bastaki, Mohamed Khalifa
Congenital Disorders of Glycosylation (CDG) are new and rapidly expanding neurometabolic disorders with multisystem involvements, broad phenotypic manifestations, and variable severity. The majority results from a defect of one of the steps involved with protein or lipid N-glycosylation pathway. . Almost all are inherited in autosomal recessive patterns with a few exceptions such as the X-linked ALG13. Mutations of ALG13 are reported, so far in only 10 patients, all were ascertained through exome/genome sequencing...
August 1, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28778786/a-novel-mutation-in-cdk5rap2-gene-causes-primary-microcephaly-with-speech-impairment-and-sparse-eyebrows-in-a-consanguineous-pakistani-family
#20
Uzma Abdullah, Muhammad Farooq, Yuan Mang, Syeda Marriam Bakhtiar, Ambrin Fatima, Lars Hansen, Klaus Wilbrandt Kjaer, Lars Allan Larsen, Niels Tommerup, Shahid Mahmood Baig
The CDK5RAP2 gene encodes a centrosomal protein, highly expressed in fetal brain and essentially indispensable for its normal development, as biallelic mutations lead to primary microcephaly (MCPH). Despite being known as MCPH linked gene for more than a decade, the phenotypic spectrum of CDK5RAP2 mutations is still under explored as only eleven families have been reported worldwide. Here, we analyzed a consanguineous Pakistani MCPH family, characterized by moderate to severe intellectual disability, speech impairment, moderately short stature and sparse eyebrows...
August 1, 2017: European Journal of Medical Genetics
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