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Journal of Medical Genetics

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https://www.readbyqxmd.com/read/29440350/correction-to-correction-foxp1-related-intellectual-disability-syndrome-a-recognisable-entity
#1
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February 13, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29440248/risk-category-system-to-identify-pituitary-adenoma-patients-with-aip-mutations
#2
Francisca Caimari, Laura Cristina Hernández-Ramírez, Mary N Dang, Plamena Gabrovska, Donato Iacovazzo, Karen Stals, Sian Ellard, Márta Korbonits
BACKGROUND: Predictive tools to identify patients at risk for gene mutations related to pituitary adenomas are very helpful in clinical practice. We therefore aimed to develop and validate a reliable risk category system for aryl hydrocarbon receptor-interacting protein ( AIP ) mutations in patients with pituitary adenomas. METHODS: An international cohort of 2227 subjects were consecutively recruited between 2007 and 2016, including patients with pituitary adenomas (familial and sporadic) and their relatives...
February 10, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29440349/genetic-tests-in-lymphatic-vascular-malformations-and-lymphedema
#3
Sandro Michelini, Stefano Paolacci, Elena Manara, Costantino Eretta, Raul Mattassi, Byung-Boong Lee, Matteo Bertelli
Syndromes with lymphatic malformations show phenotypic variability within the same entity, clinical features that overlap between different conditions and allelic as well as locus heterogeneity. The aim of this review is to provide a comprehensive clinical genetic description of lymphatic malformations and the techniques used for their diagnosis, and to propose a flowchart for genetic testing. Literature and database searches were performed to find conditions characterised by lymphatic malformations or the predisposition to lymphedema after surgery, to identify the associated genes and to find the guidelines and genetic tests currently used for the molecular diagnosis of these disorders...
February 9, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29437868/agalsidase-alfa-versus-agalsidase-beta-for-the-treatment-of-fabry-disease-an-international-cohort-study
#4
Maarten Arends, Marieke Biegstraaten, Christoph Wanner, Sandra Sirrs, Atul Mehta, Perry M Elliott, Daniel Oder, Oliver T Watkinson, Daniel G Bichet, Aneal Khan, Mark Iwanochko, Frédéric M Vaz, André B P van Kuilenburg, Michael L West, Derralynn A Hughes, Carla E M Hollak
BACKGROUND: Two recombinant enzymes (agalsidase alfa 0.2 mg/kg/every other week and agalsidase beta 1.0 mg/kg/every other week) have been registered for the treatment of Fabry disease (FD), at equal high costs. An independent international initiative compared clinical and biochemical outcomes of the two enzymes. METHODS: In this multicentre retrospective cohort study, clinical event rate, left ventricular mass index (LVMI), estimated glomerular filtration rate (eGFR), antibody formation and globotriaosylsphingosine (lysoGb3) levels were compared between patients with FD treated with agalsidase alfa and beta at their registered dose after correction for phenotype and sex...
February 7, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29437867/evidence-for-genetic-anticipation-in-von-hippel-lindau-syndrome
#5
Laura Aronoff, David Malkin, Kalene van Engelen, Bailey Gallinger, Jonathan Wasserman, Raymond H Kim, Anita Villani, M Stephen Meyn, Harriet Druker
BACKGROUND: von Hippel-Lindau (vHL) syndrome is a rare autosomal-dominant disorder that confers a lifelong risk for developing both benign and malignant tumours in multiple organs. Recent evidence suggests that vHL may exhibit genetic anticipation (GA). The aim of this study was to determine if GA occurs in vHL, and if telomere shortening may be a factor in GA. METHODS: A retrospective chart review of vHL families seen at The Hospital for Sick Children between 1984 and 2016 was performed...
February 7, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29386252/tumour-risks-and-genotype-phenotype-correlations-associated-with-germline-variants-in-succinate-dehydrogenase-subunit-genes-sdhb-sdhc-and-sdhd
#6
Katrina A Andrews, David B Ascher, Douglas Eduardo Valente Pires, Daniel R Barnes, Lindsey Vialard, Ruth T Casey, Nicola Bradshaw, Julian Adlard, Simon Aylwin, Paul Brennan, Carole Brewer, Trevor Cole, Jackie A Cook, Rosemarie Davidson, Alan Donaldson, Alan Fryer, Lynn Greenhalgh, Shirley V Hodgson, Richard Irving, Fiona Lalloo, Michelle McConachie, Vivienne P M McConnell, Patrick J Morrison, Victoria Murday, Soo-Mi Park, Helen L Simpson, Katie Snape, Susan Stewart, Susan E Tomkins, Yvonne Wallis, Louise Izatt, David Goudie, Robert S Lindsay, Colin G Perry, Emma R Woodward, Antonis C Antoniou, Eamonn R Maher
BACKGROUND: Germline pathogenic variants in SDHB/SDHC/SDHD are the most frequent causes of inherited phaeochromocytomas/paragangliomas. Insufficient information regarding penetrance and phenotypic variability hinders optimum management of mutation carriers. We estimate penetrance for symptomatic tumours and elucidate genotype-phenotype correlations in a large cohort of SDHB/SDHC/SDHD mutation carriers. METHODS: A retrospective survey of 1832 individuals referred for genetic testing due to a personal or family history of phaeochromocytoma/paraganglioma...
January 31, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29378768/chromothripsis-and-ring-chromosome-22-a-paradigm-of-genomic-complexity-in-the-phelan-mcdermid-syndrome-22q13-deletion-syndrome
#7
Nehir Kurtas, Filippo Arrigoni, Edoardo Errichiello, Claudio Zucca, Cristina Maghini, Maria Grazia D'Angelo, Silvana Beri, Roberto Giorda, Sara Bertuzzo, Massimo Delledonne, Luciano Xumerle, Marzia Rossato, Orsetta Zuffardi, Maria Clara Bonaglia
INTRODUCTION: Phelan-McDermid syndrome (PMS) is caused by SHANK3 haploinsufficiency. Its wide phenotypic variation is attributed partly to the type and size of 22q13 genomic lesion (deletion, unbalanced translocation, ring chromosome), partly to additional undefined factors. We investigated a child with severe global neurodevelopmental delay (NDD) compatible with her distal 22q13 deletion, complicated by bilateral perisylvian polymicrogyria (BPP) and urticarial rashes, unreported in PMS...
January 29, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29358272/fam46a-mutations-are-responsible-for-autosomal-recessive-osteogenesis-imperfecta
#8
Mathilde Doyard, Séverine Bacrot, Céline Huber, Maja Di Rocco, Alice Goldenberg, Mona S Aglan, Perrine Brunelle, Samia Temtamy, Caroline Michot, Ghada A Otaify, Coralie Haudry, Mireille Castanet, Julien Leroux, Jean-Paul Bonnefont, Arnold Munnich, Geneviève Baujat, Pablo Lapunzina, Sophie Monnot, Victor L Ruiz-Perez, Valérie Cormier-Daire
BACKGROUND: Stüve-Wiedemann syndrome (SWS) is characterised by bowing of the lower limbs, respiratory distress and hyperthermia that are often responsible for early death. Survivors develop progressive scoliosis and spontaneous fractures. We previously identified LIFR mutations in most SWS cases, but absence of LIFR pathogenic changes in five patients led us to perform exome sequencing and to identify homozygosity for a FAM46A mutation in one case [p.Ser205Tyrfs*13]. The follow-up of this case supported a final diagnosis of osteogenesis imperfecta (OI), based on vertebral collapses and blue sclerae...
January 22, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29358271/catalogue-of-inherited-disorders-found-among-the-irish-traveller-population
#9
Sally Ann Lynch, Ellen Crushell, Deborah M Lambert, Niall Byrne, Kathleen Gorman, Mary D King, Andrew Green, Siobhan O'Sullivan, Fiona Browne, Joanne Hughes, Ina Knerr, Ahmad A Monavari, Melanie Cotter, Vivienne P M McConnell, Bronwyn Kerr, Simon A Jones, Catriona Keenan, Nuala Murphy, Declan Cody, Sean Ennis, Jackie Turner, Alan D Irvine, Jillian Casey
Background Irish Travellers are an endogamous, nomadic, ethnic minority population mostly resident on the island of Ireland with smaller populations in Europe and the USA. High levels of consanguinity result in many rare autosomal recessive disorders. Due to founder effects and endogamy, most recessive disorders are caused by specific homozygous mutations unique to this population. Key clinicians and scientists with experience in managing rare disorders seen in this population have developed a de facto advisory service on differential diagnoses to consider when faced with specific clinical scenarios...
January 22, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29358270/high-predictive-value-of-brain-mri-imaging-in-primary-mitochondrial-respiratory-chain-deficiency
#10
Isaure de Beaurepaire, David Grévent, Marlène Rio, Isabelle Desguerre, Pascale de Lonlay, Raphaël Levy, Volodia Dangouloff-Ros, Jean-Paul Bonnefont, Giulia Barcia, Benoit Funalot, Claude Besmond, Metodi D Metodiev, Benedetta Ruzzenente, Zahra Assouline, Arnold Munnich, Agnès Rötig, Nathalie Boddaert
BACKGROUND: Because the mitochondrial respiratory chain (RC) is ubiquitous, its deficiency can theoretically give rise to any symptom in any organ or tissue at any age with any mode of inheritance, owing to the twofold genetic origin of respiratory enzyme machinery, that is, nuclear and mitochondrial. Not all respiratory enzyme deficiencies are primary and secondary or artefactual deficiency is frequently observed, leading to a number of misleading conclusions and inappropriate investigations in clinical practice...
January 22, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29331982/a-false-carrier-state-for-the-c-579g-a-mutation-in-the-ncf1-gene-in-ashkenazi-jews
#11
Martin De Boer, Ronit Gavrieli, Karin van Leeuwen, Haike Reznik Wolf, Maya Dushnitzki, Yifaat Bar-Yosef, Anat Bar-Ziv, Doron Behar, Shlomo Lipitz, Tal Elkan Miller, Anton T J Tool, Taco W Kuijpers, Timo K van den Berg, Baruch Wolach, Dirk Roos, Elon Pras
BACKGROUND: Mutations in the NCF1 gene that encodes p47phox, a subunit of the NADPH oxidase complex, cause chronic granulomatous disease (CGD). In Kavkazi Jews, a c.579G>A (p.Trp193Ter) mutation in NCF1 is frequently found, leading to CGD. The same mutation is found in about 1% of Ashkenazi Jews, although Ashkenazi CGD patients with this mutation have never been described. METHODS: We used Sanger sequencing, multiplex ligation-dependent probe amplification (MLPA), gene scan analysis and Ion Torrent Next Generation Sequencing for genetic analysis, and measured NADPH oxidase activity and p47phox expression...
January 13, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29331981/variant-in-c-terminal-region-of-intestinal-alkaline-phosphatase-associated-with-benign-familial-hyperphosphatasaemia
#12
Takayuki Ishige, Sakae Itoga, Emi Utsuno, Motoi Nishimura, Masaharu Yoshikawa, Naoya Kato, Kazuyuki Matsushita, Osamu Yokosuka, Fumio Nomura
BACKGROUND: A genetic diagnosis has been rarely performed in benign familial hyperphosphatasaemia, and molecular mechanism largely remains unclear. OBJECTIVES: We encountered a case with benign familial hyperphosphatasaemia of intestinal alkaline phosphatase (IAP). To elucidate the molecular mechanism, we performed ALPI gene sequencing and in vitro protein expression analysis. METHODS: ALPI gene was sequenced by long-range PCR and massively parallel sequencing...
January 13, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29331980/dmc1-mutation-that-causes-human-non-obstructive-azoospermia-and-premature-ovarian-insufficiency-identified-by-whole-exome-sequencing
#13
Wen-Bin He, Chao-Feng Tu, Qiang Liu, Lan-Lan Meng, Shi-Min Yuan, Ai-Xiang Luo, Fu-Sheng He, Juan Shen, Wen Li, Juan Du, Chang-Gao Zhong, Guang-Xiu Lu, Ge Lin, Li-Qing Fan, Yue-Qiu Tan
BACKGROUND: The genetic causes of the majority of male and female infertility caused by human non-obstructive azoospermia (NOA) and premature ovarian insufficiency (POI) with meiotic arrest are unknown. OBJECTIVE: To identify the genetic cause of NOA and POI in two affected members from a consanguineous Chinese family. METHODS: We performed whole-exome sequencing of DNA from both affected patients. The identified candidate causative gene was further verified by Sanger sequencing for pedigree analysis in this family...
January 13, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29330337/role-of-germline-aberrations-affecting-ctnna1-map3k6-and-myd88-in-gastric-cancer-susceptibility
#14
Robbert D A Weren, Rachel S van der Post, Ingrid P Vogelaar, J Han van Krieken, Liesbeth Spruijt, Jan Lubinski, Anna Jakubowska, Urszula Teodorczyk, Cora M Aalfs, Liselotte P van Hest, Carla Oliveira, Eveline J Kamping, Hans K Schackert, Guglielmina N Ranzani, Encarna B Gómez García, Frederik J Hes, Elke Holinski-Feder, Maurizio Genuardi, Margreet G E M Ausems, Rolf H Sijmons, Anja Wagner, Lizet E van der Kolk, Annemieke Cats, Inga Bjørnevoll, Nicoline Hoogerbrugge, Marjolijn J L Ligtenberg
BACKGROUND: In approximately 10% of all gastric cancer (GC) cases, a heritable cause is suspected. A subset of these cases have a causative germline CDH1 mutation; however, in most cases the cause remains unknown. Our objective was to assess to what extent these remaining cases may be explained by germline mutations in the novel candidate GC predisposing genes CTNNA1, MAP3K6 or MYD88. METHODS: We sequenced a large cohort of unexplained young and/or familial patients with GC (n=286) without a CDH1germline mutation for germline variants affecting CTNNA1, MAP3K6 and MYD88 using a targeted next-generation sequencing approach based on single-molecule molecular inversion probes...
January 12, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29330336/risk-factors-for-survival-in-patients-with-von-hippel-lindau-disease
#15
Jiang-Yi Wang, Shuang-He Peng, Teng Li, Xiang-Hui Ning, Sheng-Jie Liu, Bao-An Hong, Jia-Yuan Liu, Peng-Jie Wu, Bo-Wen Zhou, Jing-Cheng Zhou, Nie-Nie Qi, Xiang Peng, Jiu-Feng Zhang, Kai-Fang Ma, Lin Cai, Kan Gong
BACKGROUND: Historically, von Hippel-Lindau (VHL) disease is characterised by a poor survival. Although genotype-phenotype correlation has been described in many studies, the risk factors for VHL survival remain unclear. This study aims to evaluate the median survival of Chinese patients with VHL disease and explore whether VHL survival is influenced by genetic and clinical factors. METHODS: In this retrospective study, we recruited 340 patients from 127 VHL families...
January 12, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29330335/fabry-disease-prevalence-of-affected-males-and-heterozygotes-with-pathogenic-gla-mutations-identified-by-screening-renal-cardiac-and-stroke-clinics-1995-2017
#16
Dana Doheny, Ram Srinivasan, Silvere Pagant, Brenden Chen, Makiko Yasuda, Robert J Desnick
BACKGROUND: Fabry Disease (FD), an X linked lysosomal storage disease due to pathogenic α-galactosidase A (GLA) mutations, results in two major subtypes, the early-onset Type 1 'Classic' and the Type 2 'Later-Onset' phenotypes. To identify previously unrecognised patients, investigators screened cardiac, renal and stroke clinics by enzyme assays. However, some screening studies did not perform confirmatory GLA mutation analyses, and many included recently recognised 'benign/likely-benign' variants, thereby inflating prevalence estimates...
January 12, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29330334/detection-of-heterozygous-mutation-in-hook-microtubule-tethering-protein-1-in-three-patients-with-decapitated-and-decaudated-spermatozoa-syndrome
#17
Huixing Chen, Yong Zhu, Zijue Zhu, Erlei Zhi, Keming Lu, Xiaobo Wang, Feng Liu, Zheng Li, Weiliang Xia
BACKGROUND: The mechanism of intramanchette transport is crucial to the transformation of sperm tail and the nuclear condensation during spermiogenesis. Although few dysfunctional proteins could result in abnormal junction between the head and tail of spermatozoon, little is known about the genetic cues in this process. OBJECTIVE: Based on patients with severe decapitated and decaudated spermatozoa (DDS) syndrome, the study aimed to validate whether new mutation exists on their Hook microtubule-tethering protein 1 (HOOK1) genes and follow their results of assisted reproduction treatment (ART)...
January 12, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29301855/gene-editing-as-a-promising-approach-for-respiratory-diseases
#18
Yichun Bai, Yang Liu, Zhenlei Su, Yana Ma, Chonghua Ren, Runzhen Zhao, Hong-Long Ji
Respiratory diseases, which are leading causes of mortality and morbidity in the world, are dysfunctions of the nasopharynx, the trachea, the bronchus, the lung and the pleural cavity. Symptoms of chronic respiratory diseases, such as cough, sneezing and difficulty breathing, may seriously affect the productivity, sleep quality and physical and mental well-being of patients, and patients with acute respiratory diseases may have difficulty breathing, anoxia and even life-threatening respiratory failure. Respiratory diseases are generally heterogeneous, with multifaceted causes including smoking, ageing, air pollution, infection and gene mutations...
January 4, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29275357/evaluation-of-the-relative-effectiveness-of-the-2017-updated-manchester-scoring-system-for-predicting-brca1-2-mutations-in-a-southeast-asian-country
#19
Winston Chew, Rajesh Babu Moorakonda, Eliza Courtney, Hazel Soh, Shao Tzu Li, Yanni Chen, Tarryn Shaw, John Carson Allen, Dafydd Gareth R Evans, Joanne Ngeow
BACKGROUND: Germline mutations in the BRCA1 and BRCA2 genes have significant clinical implications for both risk-reducing and early surveillance management. The third and most recent revision of the Manchester scoring system (MSS3) used to distinguish patients indicated for germline BRCA1/2 testing included further adjustments for triple negative breast cancer, high-grade serous ovarian cancer and human epidermal growth factor 2 (HER2) receptor status. This study aims to evaluate the relative effectiveness of MSS3 in a Southeast Asian population...
December 23, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29263160/p4hb-recurrent-missense-mutation-causing-cole-carpenter-syndrome
#20
Meena Balasubramanian, Raja Padidela, Rebecca C Pollitt, Nicholas J Bishop, M Zulf Mughal, Amaka C Offiah, Bart E Wagner, Janine McCaughey, David J Stephens
BACKGROUND: Cole-Carpenter syndrome (CCS) is commonly classified as a rare Osteogenesis Imperfecta (OI) disorder. This was following the description of two unrelated patients with very similar phenotypes who were subsequently shown to have a heterozygous missense mutation in P4HB. OBJECTIVES: Here, we report a 3-year old female patient with severe OI who on exome sequencing was found to carry the same missense mutation in P4HB as reported in the original cohort...
December 20, 2017: Journal of Medical Genetics
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