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https://www.readbyqxmd.com/read/29341839/activation-of-frataxin-protein-expression-by-antisense-oligonucleotides-targeting-the-mutant-expanded-repeat
#1
Liande Li, Xiulong Shen, Zhongtian Liu, Michaela Norrbom, Thazha P Prakash, Daniel O'Reilly, Vivek K Sharma, Masad J Damha, Jonathan K Watts, Frank Rigo, David R Corey
Friedreich's Ataxia (FA) is an inherited neurologic disorder caused by an expanded GAA repeat within intron 1 of the frataxin (FXN) gene that reduces expression of FXN protein. Agents that increase expression of FXN have the potential to alleviate the disease. We previously reported that duplex RNAs (dsRNAs) and antisense oligonucleotides (ASOs) complementary to the GAA repeat could enhance expression of FXN protein. We now explore the potential of a diverse group of chemically modified dsRNAs and ASOs to define the breadth of repeat-targeted synthetic nucleic acids as a platform for therapeutic development for FA...
January 17, 2018: Nucleic Acid Therapeutics
https://www.readbyqxmd.com/read/29341445/automated-detection-of-preserved-photoreceptor-on-optical-coherence-tomography-in-choroideremia-based-on-machine-learning
#2
Zhuo Wang, Acner Camino, Ahmed M Hagag, Jie Wang, Richard G Weleber, Paul Yang, Mark E Pennesi, David Huang, Dengwang Li, Yali Jia
Optical coherence tomography (OCT) can demonstrate early deterioration of the photoreceptor integrity caused by inherited retinal degeneration diseases (IRD). A machine learning method based on random forests was developed to automatically detect continuous areas of preserved ellipsoid zone structure (an easily recognizable part of the photoreceptors on OCT) in sixteen eyes of patients with choroideremia (a type of IRD). Pseudopodial extensions protruding from the preserved ellipsoid zone areas are detected separately by a local active contour routine...
January 17, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29341362/a-novel-mutation-of-lrsam1-in-a-chinese-family-with-charcot-marie-tooth-disease
#3
Guohua Zhao, Jie Song, Mi Yang, Xiuhua Song, Xiaomin Liu
Charcot-Marie-Tooth (CMT) disease is the most common inherited peripheral neuropathy characterized by progressive distal muscle weakness and atrophy with decreased or absent tendon reflexes. Mutations in LRSAM1 have been identified to cause CMT disease type 2P. We report a novel LRSAM1 mutation c.2021-2024del (p.E674VfsX11) in a Chinese autosomal dominant CMT disease type 2 family. The phenotype was characterized by late onset and mild sensory impairment. Electrophysiological findings showed normal or mildly to moderately reduced motor and sensory nerve conduction velocities in lower and upper limb nerves...
January 17, 2018: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/29341116/rare-missense-mutations-in-recql-and-polg-associate-with-inherited-predisposition-to-breast-cancer
#4
Anna Tervasmäki, Tuomo Mantere, Jaana M Hartikainen, Saila Kauppila, Hang-Mao Lee, Susanna Koivuluoma, Mervi Grip, Peeter Karihtala, Arja Jukkola-Vuorinen, Arto Mannermaa, Robert Winqvist, Katri Pylkäs
Several known breast cancer susceptibility genes with moderate-to-high risk alleles encode proteins involved in DNA damage response (DDR). As these explain less than half of the hereditary breast cancer cases, additional predisposing alleles are likely to be discovered. Many of the previous studies utilizing massive parallel sequencing have focused on the protein-truncating variants, and the role of rare missense mutations has remained poorly addressed. In order to identify novel susceptibility factors, we have systematically analyzed the data from our parallel sequencing of 796 DDR genes in 189 Northern Finnish hereditary breast cancer patients for rare missense variants, predicted as deleterious...
January 17, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29340523/a-case-of-severe-glutathione-synthetase-deficiency-with-novel-gss-mutations
#5
H Xia, J Ye, L Wang, J Zhu, Z He
Glutathione synthetase deficiency (GSSD) is a rare inborn error of glutathione metabolism with autosomal recessive inheritance. The severe form of the disease is characterized by acute metabolic acidosis, usually present in the neonatal period with hemolytic anemia and progressive encephalopathy. A case of a male newborn infant who had severe metabolic acidosis with high anion gap, hemolytic anemia, and hyperbilirubinemia is reported. A high level of 5-oxoproline was detected in his urine and a diagnosis of generalized GSSD was made...
January 11, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29339962/three-new-pax2-gene-mutations-in-patients-with-papillorenal-syndrome
#6
Alberto Galvez-Ruiz, Anthony J Lehner, Alicia Galindo-Ferreiro, Patrik Schatz
Papillorenal syndrome (PAPRS; Mendelian Inheritance in Man [MIM] 120330) is an autosomal dominant disease characterised by the presence of congenital renal and optic nerve abnormalities associated with mutations of the PAX2 gene. In this article, the authors present four patients with PAPRS who are carriers of three new PAX2 mutations, as well as another patient with a possible non-pathogenic variant of the PAX2 gene. All patients were given a full neurophthalmological examination, and all patients underwent a genetic test for PAX2...
October 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29339836/the-role-of-metabolic-enzymes-in-mesenchymal-tumors-and-tumor-syndromes-genetics-pathology-and-molecular-mechanisms
#7
REVIEW
Inga-Marie Schaefer, Jason L Hornick, Judith V M G Bovée
The discovery of mutations in genes encoding the metabolic enzymes isocitrate dehydrogenase (IDH), succinate dehydrogenase (SDH), and fumarate hydratase (FH) has expanded our understanding not only of altered metabolic pathways but also epigenetic dysregulation in cancer. IDH1/2 mutations occur in enchondromas and chondrosarcomas in patients with the non-hereditary enchondromatosis syndromes Ollier disease and Maffucci syndrome and in sporadic tumors. IDH1/2 mutations result in excess production of the oncometabolite (D)-2-hydroxyglutarate...
January 16, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29339498/mafa-missense-mutation-causes-familial-insulinomatosis-and-diabetes-mellitus
#8
Donato Iacovazzo, Sarah E Flanagan, Emily Walker, Rosana Quezado, Fernando Antonio de Sousa Barros, Richard Caswell, Matthew B Johnson, Matthew Wakeling, Michael Brändle, Min Guo, Mary N Dang, Plamena Gabrovska, Bruno Niederle, Emanuel Christ, Stefan Jenni, Bence Sipos, Maike Nieser, Andrea Frilling, Ketan Dhatariya, Philippe Chanson, Wouter W de Herder, Björn Konukiewitz, Günter Klöppel, Roland Stein, Márta Korbonits, Sian Ellard
The β-cell-enriched MAFA transcription factor plays a central role in regulating glucose-stimulated insulin secretion while also demonstrating oncogenic transformation potential in vitro. No disease-causing MAFA variants have been previously described. We investigated a large pedigree with autosomal dominant inheritance of diabetes mellitus or insulinomatosis, an adult-onset condition of recurrent hyperinsulinemic hypoglycemia caused by multiple insulin-secreting neuroendocrine tumors of the pancreas. Using exome sequencing, we identified a missense MAFA mutation (p...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29339359/genetic-variants-in-immune-related-pathways-and-breast-cancer-risk-in-african-american-women-in-the-amber-consortium
#9
Chi-Chen Hong, Lara E Sucheston-Campbell, Song Liu, Qiang Hu, Song Yao, Kathryn L Lunetta, Stephen A Haddad, Edward A Ruiz-Narváez, Jeannette T Bensen, Ting-Yuan David Cheng, Elisa V Bandera, Lynn A Rosenberg, Christopher A Haiman, Kelvin P Lee, Sharon S Evans, Scott I Abrams, Elizabeth A Repasky, Andrew F Olshan, Julie R Palmer, Christine B Ambrosone
BACKGROUND: Constitutional immunity shaped by exposure to endemic infectious diseases and parasitic worms in Sub-Saharan Africa may play a role in the etiology of breast cancer among African American (AA) women. METHODS: A total of 13,235 gene variants in 433 genes across 45 immune pathways were analyzed in the AMBER consortium among 3,663 breast cancer cases and 4,687 controls. Gene-based pathway analyses were conducted using the adaptive rank truncated product statistic for overall breast cancer risk, and risk by estrogen receptor (ER) status...
January 16, 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29337205/increasing-mtdna-levels-as-therapy-for-mitochondrial-optic-neuropathies
#10
Eduardo Ruiz-Pesini, Sonia Emperador, Ester López-Gallardo, Carmen Hernandez-Ainsa, Julio Montoya
Leber hereditary optic neuropathy (LHON) is a rare, inherited mitochondrial disease. No treatment has shown a clear-cut benefit on a clinically meaningful end-point. Primary open-angle glaucoma is a frequent, acquired optic neuropathy. Lowering intraocular pressure reduces disease progression. However, current methods to decelerate this progression are recognized as being inadequate. Therefore, there is a clear need to look for new therapeutic approaches. The growing evidence indicates that primary open-angle glaucoma can also be a mitochondrial optic neuropathy (MON)...
January 11, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29337092/germline-brca-mutation-and-outcome-in-young-onset-breast-cancer-posh-a-prospective-cohort-study
#11
Ellen R Copson, Tom C Maishman, Will J Tapper, Ramsey I Cutress, Stephanie Greville-Heygate, Douglas G Altman, Bryony Eccles, Sue Gerty, Lorraine T Durcan, Louise Jones, D Gareth Evans, Alastair M Thompson, Paul Pharoah, Douglas F Easton, Alison M Dunning, Andrew Hanby, Sunil Lakhani, Ros Eeles, Fiona J Gilbert, Hisham Hamed, Shirley Hodgson, Peter Simmonds, Louise Stanton, Diana M Eccles
BACKGROUND: Retrospective studies provide conflicting interpretations of the effect of inherited genetic factors on the prognosis of patients with breast cancer. The primary aim of this study was to determine the effect of a germline BRCA1 or BRCA2 mutation on breast cancer outcomes in patients with young-onset breast cancer. METHODS: We did a prospective cohort study of female patients recruited from 127 hospitals in the UK aged 40 years or younger at first diagnosis (by histological confirmation) of invasive breast cancer...
January 11, 2018: Lancet Oncology
https://www.readbyqxmd.com/read/29335813/organic-acidurias-in-adults-late-complications-and-management
#12
Ali Tunç Tuncel, Nikolas Boy, Marina A Morath, Friederike Hörster, Ulrike Mütze, Stefan Kölker
Organic acidurias (synonym, organic acid disorders, OADs) are a heterogenous group of inherited metabolic diseases delineated with the implementation of gas chromatography/mass spectrometry in metabolic laboratories starting in the 1960s and 1970s. Biochemically, OADs are characterized by accumulation of mono-, di- and/or tricarboxylic acids ("organic acids") and corresponding coenzyme A, carnitine and/or glycine esters, some of which are considered toxic at high concentrations. Clinically, disease onset is variable, however, affected individuals may already present during the newborn period with life-threatening acute metabolic crises and acute multi-organ failure...
January 15, 2018: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/29335644/runs-of-homozygosity-windows-into-population-history-and-trait-architecture
#13
REVIEW
Francisco C Ceballos, Peter K Joshi, David W Clark, Michèle Ramsay, James F Wilson
Long runs of homozygosity (ROH) arise when identical haplotypes are inherited from each parent and thus a long tract of genotypes is homozygous. Cousin marriage or inbreeding gives rise to such autozygosity; however, genome-wide data reveal that ROH are universally common in human genomes even among outbred individuals. The number and length of ROH reflect individual demographic history, while the homozygosity burden can be used to investigate the genetic architecture of complex disease. We discuss how to identify ROH in genome-wide microarray and sequence data, their distribution in human populations and their application to the understanding of inbreeding depression and disease risk...
January 15, 2018: Nature Reviews. Genetics
https://www.readbyqxmd.com/read/29335530/segregation-of-mitochondrial-dna-heteroplasmy-through-a-developmental-genetic-bottleneck-in-human-embryos
#14
Vasileios I Floros, Angela Pyle, Sabine Dietmann, Wei Wei, Walfred W C Tang, Naoko Irie, Brendan Payne, Antonio Capalbo, Laila Noli, Jonathan Coxhead, Gavin Hudson, Moira Crosier, Henrik Strahl, Yacoub Khalaf, Mitinori Saitou, Dusko Ilic, M Azim Surani, Patrick F Chinnery
Mitochondrial DNA (mtDNA) mutations cause inherited diseases and are implicated in the pathogenesis of common late-onset disorders, but how they arise is not clear1,2. Here we show that mtDNA mutations are present in primordial germ cells (PGCs) within healthy female human embryos. Isolated PGCs have a profound reduction in mtDNA content, with discrete mitochondria containing ~5 mtDNA molecules. Single-cell deep mtDNA sequencing of in vivo human female PGCs showed rare variants reaching higher heteroplasmy levels in late PGCs, consistent with the observed genetic bottleneck...
January 15, 2018: Nature Cell Biology
https://www.readbyqxmd.com/read/29335023/early-neonatal-glutaric-aciduria-type-i-hidden-by-perinatal-asphyxia-a-case-report
#15
Giacomo Biasucci, Nicola Morelli, Federica Natacci, Massimo Mastrangelo
BACKGROUND: Perinatal asphyxia (PA) occurs in about 2 to 10 per 1000 live full-term births. Although neonatal epileptic seizures are observed in up to 60% of cases, PA may mimic or subtend other conditions. Hypoxia related brain injury is particularly relevant, as it may have permanent effects on neuropsychomotor development. Antepartum obstetric conditions, may, in turn, lead to hypoxic-ischemic damage to the fetus and the newborn, often underlying PA. Herein, a case of PA that hid and triggered signs and symptoms of Glutaric Aciduria type I (GA-I), is reported...
January 15, 2018: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/29334305/twelve-tips-for-teaching-a-comprehensive-disease-focused-course-with-a-global-perspective-a-sickle-cell-disease-example
#16
Dominique Bulgin, Paula Tanabe, Monika Asnani, Charmaine D M Royal
A disease-focused course entitled "Understanding Sickle Cell Disease: A Biopsychosocial Approach" addressed the complex nature of SCD using patient-centered, global and interdisciplinary approaches. Sickle cell disease (SCD) is a rare inherited blood disorder that requires multidisciplinary care. Worldwide 20-25 million individuals have SCD, which is associated with a shortened lifespan due to many medical complications and social and behavioral health challenges. Health care professionals often have limited knowledge of SCD as they typically learn about it within the context of their own disciplines...
January 15, 2018: Medical Teacher
https://www.readbyqxmd.com/read/29333579/factors-associated-with-the-number-and-size-of-renal-angiomyolipomas-in-sporadic-angiomyolipoma-saml-a-study-of-adult-patients-with-saml-managed-in-a-dutch-tertiary-referral-center
#17
J L H Ruud Bosch, Francis Vekeman, Mei Sheng Duh, Maureen Neary, Matthew Magestro, Jonathan Fortier, Paul Karner, Raluca Ionescu-Ittu, Bernard A Zonnenberg
PURPOSE: To describe the patient characteristics, treatments, disease monitoring, and kidney function of patients with sporadic angiomyolipoma (sAML), stratified by the number and size of renal angiomyolipomas (AMLs). METHODS: Single-center retrospective analysis of patients with sAML treated from 1990 to 2015 in a dedicated clinic for inheritable tumor syndromes in a tertiary referral center from the Netherlands. Patients' first AML assessment at the clinic was defined as the index date...
January 15, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29333065/hepatitis-c-infection-in-patients-with-hereditary-bleeding-disorders-epidemiology-natural-history-and-management
#18
REVIEW
Nikolaos Papadopoulos, Vasiliki Argiana, Melanie Deutsch
Hereditary bleeding disorders include a group of diseases with abnormalities of coagulation. Prior to 1990, infection with hepatitis C virus (HCV) was mainly transmitted via pooled plasma products as a treatment for hereditary bleeding disorders. Anti-HCV positivity in these patients may be as high as >70% in some areas, while some of them have also been coinfected with human immunodeficiency virus. Since about 20% of HCV-infected patients clear the infection naturally, chronic HCV infection represents a significant health problem in this group of patients...
January 2018: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/29333004/drosha-rs642321-polymorphism-influence-susceptibility-to-childhood-acute-lymphoblastic-leukemia-a-preliminary-report
#19
Mohammad Hashemi, Seyed-Shahaboddin Hasani, Majid Naderi
Introduction: It has been well known that the microRNA biogenesis is involved in the pathogenesis of various diseases. We investigated the possible association between DROSHA rs642321 variant and risk of acute lymphocytic leukemia (ALL). Materials and Methods: We genotyped 75 children diagnosed with ALL and 115 age- and sex-matched children with no history of cancer of any type (as the control group) by the tetra amplification refractory mutation system-polymerase chain reaction...
October 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29331982/a-false-carrier-state-for-the-c-579g-a-mutation-in-the-ncf1-gene-in-ashkenazi-jews
#20
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
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