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European Journal of Medical Genetics

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https://www.readbyqxmd.com/read/29024832/somatic-second-hit-mutation-of-rasa1-in-vascular-endothelial-cells-in-capillary-malformation-arteriovenous-malformation
#1
Philip E Lapinski, Abbas Doosti, Valerie Salato, Paula North, Patricia E Burrows, Philip D King
Capillary malformation-arteriovenous malformation (CM-AVM) is an autosomal dominant vascular disorder that is associated with inherited inactivating mutations of the RASA1 gene in the majority of cases. Characteristically, patients exhibit one or more focal cutaneous CM that may occur alone or together with AVM, arteriovenous fistulas or lymphatic vessel abnormalities. The focal nature and varying presentation of lesions has led to the hypothesis that somatic "second hit" inactivating mutations of RASA1 are necessary for disease development...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29024831/multiple-slc26a2-mutations-occurring-in-a-three-generational-family
#2
Ana Coral Barreda-Bonis, Jimena Barraza-García, Manuel Parrón, Ignacio Pastor, Karen E Heath, Isabel González-Casado
Multiple epiphyseal dysplasias (MED) are a group of heterogeneous skeletal dysplasias, which share a common phenotype: short stature, skeletal deformities, joint pain and early onset osteoarthritis. Mutations in COMP account for approximately half of autosomal dominant MED cases whilst SLC26A2 mutations account for ∼25% of the recessive cases in the Caucasian population. We present here an interesting family, which was thought to initially have an autosomal dominant skeletal dysplasia. Using a targeted sequencing skeletal dysplasia panel, the proband was found to be a compound heterozygote for two mutations in SLC26A2, one novel mutation, p...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29024830/new-ocular-finding-in-baraitser-winter-syndrome
#3
Natalie Rall, Alejandro Leon, Ricardo Gomez, Jessica Daroca, Yves Lacassie
Baraitser-Winter syndrome was first described as a syndrome of mental retardation with bilateral ptosis, iris coloboma, widely spaced eyes, broad epicanthus, flattened nasal bridge, hypertelorism, and short stature (Baraitser and Winter, 1988; Baraitser-Winter- iris co, 2016). In a recent review of 42 cases, the phenotypic spectrum has broadened including high-arched eyebrows, short upturned nose tip, long philtrum, cleft lip and palate, abnormally shaped ears, deafness, congenital heart defects, microphthalmia, metopic ridge, microcephaly, pachygyria, progressive joint stiffness, epilepsy, syndactyly, and dystonia, among other less reported signs (Baraitser and Winter, 1988; Ganesh et al...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29024829/distal-renal-tubular-acidosis-in-a-libyan-patient-evidence-for-digenic-inheritance
#4
Majdi Nagara, Gregori Papagregoriou, Rim Ben Abdallah, Zied Landoulsi, Yosra Bouyacoub, Sahar Elouej, Rym Kefi, Tommaso Pippucci, Voskarides Konstantinos, Anu Bashamboo, Kenneth McElreavey, Mongia Hachicha, Giovanni Romeo, Marco Seri, Constantinos Deltas, Sonia Abdelhak
AIM OF THE STUDY: Recent advances in understanding the underlying molecular mechanism for distal renal tubular acidosis (dRTA), led to an increased attention towards the primary and the familial forms of the disease. Mutations in ATP6V1B1 and ATP6V0A4 are usually responsible for the recessive form of the disease. Mutations in gene AE1 encoding the Cl-/HCO3- exchanger, usually present as dominant dRTA, but a recessive pattern has been recently described. Our objective is to identify the mutational spectrum responsible of dRTA in a consanguineous Libyan family...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29024828/a-classical-ehlers-danlos-syndrome-family-with-incomplete-presentation-diagnosed-by-molecular-testing
#5
Marina Colombi, Chiara Dordoni, Valeria Cinquina, Marina Venturini, Marco Ritelli
The 2017 EDS revised nosology indicates that minimal criteria suggestive for classical Ehlers-Danlos syndrome (cEDS) are skin hyperextensibility plus atrophic scarring together with either generalized joint hypermobility (gJHM) and/or at least three minor criteria that include cutaneous features and gJHM complications. Confirmatory molecular testing is obligatory to reach a final diagnosis. Although the large majority of the patients presents with these clinical features, some do not and might remain undiagnosed or misdiagnosed...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29024827/left-ventricular-non-compaction-with-ebstein-anomaly-attributed-to-a-tpm1-mutation
#6
Aleksandra Nijak, Maaike Alaerts, Cuno Kuiperi, Anniek Corveleyn, Bert Suys, Bernard Paelinck, Johan Saenen, Emeline Van Craenenbroeck, Lut Van Laer, Bart Loeys, Aline Verstraeten
Left ventricular non-compaction (cardiomyopathy) (LVN(C)) is a rare hereditary cardiac condition, resulting from abnormal embryonic myocardial development. While it mostly occurs as an isolated condition, association with other cardiovascular manifestations such as Ebstein anomaly (EA) has been reported. This congenital heart defect is characterized by downward displacement of the tricuspid valve and leads to diminished ventricular size and function. In an autosomal dominant LVN(C) family consisting of five affected individuals, of which two also presented with EA and two others with mitral valve insufficiency, we pursued the genetic disease cause using whole exome sequencing (WES)...
October 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29024826/letter-regarding-the-article-extending-the-phenotype-of-recurrent-rearrangements-of-16p11-2-deletions-in-mentally-retarded-patients-without-autism-and-in-normal-individuals-and-the-diagnosis-of-coexisting-mowat-wilson-syndrome-in-a-patient-with-16p11-2-deletion
#7
LETTER
https://www.readbyqxmd.com/read/28943464/the-spectrum-of-familial-mediterranean-fever-gene-mefv-mutations-and-genotypes-in-iran-and-report-of-a-novel-missense-variant-r204h
#8
Nader Ebadi, Abbas Shakoori, Masoumeh Razipour, Arash Salmaninejad, Razieh Zarifian Yeganeh, Saman Mehrabi, Seyed RezaRaees Karami, Malihea Khaleghian, Hamidreza Azhideh
BACKGROUND: Familial Mediterranean Fever (FMF) is an autosomal recessive disorder, characterized by recurrent and self-limited episodes of fever, abdominal pain, synovitis and pleuritis. FMF as the most common inherited monogenic autoinflammatory disease mainly affects ethnic groups of the Mediterranean basin, Arab, Jewish, Turkish, Armenian North Africans and Arabic descent. MATERIALS AND METHODS: In the present study, we selected 390 unrelated FMF patients according to the Tel-Hashomer criteria, and analyzed all patients for 12 most common mutations of MEFV gene by reverse hybridization assay (FMF strip assay)...
September 21, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28919208/genetics-of-clubfoot-recent-progress-and-future-perspectives
#9
REVIEW
Sulman Basit, Khalid I Khoshhal
Clubfoot or talipes equinovarus (TEV) is an inborn three-dimensional deformity of leg, ankle and foot. It results from structural defects of several tissues of foot and lower leg leading to abnormal positioning of foot and ankle joints. TEV can lead to long-lasting functional disability, malformation and discomfort if left untreated. Substantial progress has been achieved in the management and diagnosis of limb defects; however, not much is known about the molecular players and signalling pathways underlying TEV disorder...
September 14, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28917829/a-chinese-boy-with-geleophysic-dysplasia-caused-by-compound-heterozygous-mutations-in-adamtsl2
#10
Dongxiao Li, Hui Dong, Hong Zheng, Jinqing Song, Xiyuan Li, Ying Jin, Yupeng Liu, Yanling Yang
Geleophysic dysplasia, belonging to the group of acromelic dysplasia, is a rare genetic disease. Two genes, FBN1 and ADAMTSL2, were known to be linked to this disorder. The disorder presents as extreme short stature, short limbs, small hands and feet, stubby fingers and toes, joint stiffness, toe walking, skin thickening, progressive cardiac valvular thickening and characteristic facial features, including a round face with full cheeks. Here, we report the first Chinese case with geleophysic dysplasia type 1 based on clinical and genetic features...
September 14, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28917830/al-awadi-raas-rothschild-syndrome-with-dental-anomalies-and-a-novel-wnt7a-mutation
#11
Piranit Nik Kantaputra, Seema Kapoor, Prashant Verma, Massupa Kaewgahya, Katsushige Kawasaki, Atsushi Ohazama, James R Ketudat Cairns
Al-Awadi-Raas-Rothschild syndrome (AARRS; OMIM 276820) is a very rare autosomal recessive limb malformation syndrome caused by WNT7A mutations. AARRS is characterized by various degrees of limb aplasia and hypoplasia. Normal intelligence and malformations of urogenital system are frequent findings. Complete loss of WNT7A function has been shown to cause AARRS, however, its partial loss leads to the milder malformation, Fuhrmann syndrome. An Indian boy affected with AARRS is reported. A novel homozygous base substitution mutation c...
September 13, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28919362/a-homozygote-trex1-mutation-in-two-siblings-with-different-phenotypes-chilblains-and-cerebral-vasculitis
#12
Rabia Miray Kisla Ekinci, Sibel Balci, Atil Bisgin, Derya Ufuk Altintas, Mustafa Yılmaz
Three prime repair exonuclease 1 degrades single and double stranded DNA with 3'-5' nuclease activity and its mutations are related to type 1 IFN mediated autoinflammation due to accumulated intracellular nucleic acids. To date, several cases of systemic lupus erythematosus, Aicardi-Goutieres syndrome, familial chilblain lupus, retinal vasculopathy-cerebral leukodystrophy have been reported with TREX1 mutations. Chilblain lupus is a skin disease characterized by blue-reddish coloring, swelling or ulcers on acral regions of body such as fingertips, heels, nose and auricles...
September 12, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28911804/case-report-left-ventricular-noncompaction-cardiomyopathy-and-rasopathies
#13
Juli Ann Sublett, Carlos Enrique Prada, John Lynn Jefferies
The following is a case report of 6 patients with Noonan syndrome (NS) and/or a related RASsopathy that also have evidence of left ventricular noncompaction cardiomyopathy (LVNC). Noonan syndrome,a type of RASopathy, is an autosomal dominant disorder that is typically associated with congenital heart defects and hypertrophic cardiomyopathy. There have been minimal reports of Noonan syndrome or other RASopathy and the association of LVNC. This report promulgates 6 nonrelated cases of Noonan syndrome or unspecified RASopathy and LVNC...
September 12, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28899818/familial-9q33q34-microduplication-in-siblings-with-developmental-disorders-and-acrocephaly
#14
Keiko Shimojima, Nobuhiko Okamoto, Himanshu Goel, Yumiko Ondo, Toshiyuki Yamamoto
Because several genes responsible for epileptic encephalopathy are located on the 9q33q34 region, patients with chromosomal deletions of this region often show intractable epilepsy and neurodevelopmental disability. Contrary to these findings, chromosomal duplications of this region have never been reported previously. We identified a first case of 9q33q34 microduplications in siblings associated with developmental disorders and macrocephaly. Their mother was a mosaic carrier of this duplication. Duplicated regions involved STXBP1; the gene related to epileptic encephalopathy...
September 9, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28893644/high-bone-mass-due-to-novel-lrp5-and-amer1-mutations
#15
Alice Costantini, Päivi Kekäläinen, Riikka E Mäkitie, Outi Mäkitie
WNT signaling is a key regulator of bone metabolism and its increased or decreased activity leads to skeletal disorders. Here we describe two patients with high bone mass (HBM) caused by novel mutations in two different WNT pathway components. The first patient is a 53-year-old male with HBM. He was diagnosed at adult age based on significantly increased bone mineral density (BMD). He has undergone several surgeries due to excessive bone in ear canals, bilateral jaw exostoses and mandibular tori. Radiographs show severe cortical thickening of cranial and long bones...
September 8, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28882788/efficient-detection-of-chromosome-imbalances-and-exome-single-nucleotide-variants-using-targeted-sequencing-in-the-clinical-setting
#16
Darine Villela, Silvia Souza da Costa, Angela M Vianna-Morgante, Ana C V Krepischi, Carla Rosenberg
We evaluated an approach to detect copy number variants (CNVs) and single nucleotide changes (SNVs), using a clinically focused exome panel complemented with a backbone and SNP probes that allows for genome-wide copy number changes and copy-neutral absence of heterozygosity (AOH) calls; this approach potentially substitutes the use of chromosomal microarray testing and sequencing into a single test. A panel of 16 DNA samples with known alterations ranging from megabase-scale CNVs to single base modifications were used as positive controls for sequencing data analysis...
September 4, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28870638/exome-sequencing-for-the-differential-diagnosis-of-ciliary-chondrodysplasias-example-of-a-wdr35-mutation-case-and-review-of-the-literature
#17
Dinu Antony, Narayanan Nampoory, Chiara Bacchelli, Motasem Melhem, Kaman Wu, Chela T James, Philip L Beales, Mike Hubank, Daisy Thomas, Anant Mashankar, Kazem Behbehani, Miriam Schmidts, Osama Alsmadi
Exome sequencing is becoming widely popular and affordable, making it one of the most desirable methods for the identification of rare genetic variants for clinical diagnosis. Here, we report the clinical application of whole exome sequencing for the ultimate diagnosis of a ciliary chondrodysplasia case presented with an initial clinical diagnosis of Asphyxiating Thoracic Dystrophy (ATD, Jeune Syndrome). We have identified a novel homozygous missense mutation in WDR35 (c.206G > A), a gene previously associated with Sensenbrenner Syndrome, Ellis-van Creveld syndrome and Short-rib polydactyly syndrome type V...
September 1, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28867506/gait-disturbance-and-lower-limb-pain-in-a-patient-with-pik3ca-related-disorder
#18
Gerarda Cappuccio, Marianna Alagia, Mariangela D'Anna, Carlotta Ranieri, Silvia Di Tommaso, Claudio Bruno, Chiara Fiorillo, Marina Pedemonte, Daria Loconte, Roberto Della Casa, Pietro Strisciuglio, Maria Isabella Ginocchio, Michele Pinelli, Nicoletta Resta, Nicola Brunetti-Pierri
Post-zygotic activating mutations in PIK3CA and other genes encoding members of PI3K-AKT-mTOR pathway have been found in various overgrowth syndromes that have been grouped together as PIK3CA-related overgrowth spectrum (PROS). We report a female patient with gait disturbance, leg pain, isolated macrodactyly of the foot, and mild intellectual disability. Imaging of the lower limb showed a lipoblastoma of the right thigh. A mosaic gain-of-function mutation in the catalytic domain of PIK3CA (c.3140 A > G; p...
September 1, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28864178/very-early-onset-inflammatory-bowel-disease-investigation-of-the-il-10-signaling-pathway-in-iranian-children
#19
Shahram Nemati, Shahram Teimourian, Mina Tabrizi, Mehri Najafi, Naghi Dara, Farid Imanzadeh, Mitra Ahmadi, Maryam Kazemi Aghdam, Mohmoud Tavassoli, Pejman Rohani, Seyyed Ramin Madani, Martin de Boer, T W Kuijpers, Dirk Roos
BACKGROUND & AIM: Comparing to adult inflammatory bowel disease (IBD), those with early onset manifestations have different features in terms of the underlying molecular pathology, the course of disease and the response to therapy. We investigated the IL-10 signaling pathway previously reported as an important cause of infantile (Very Early Onset) IBD to find any possible variants. METHOD: With the next generation sequencing technique we screened IL-10, IL-10RA and IL10RB genes of 15 children affected by very early onset-GI (gastrointestinal) disorders...
August 29, 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
#20
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
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