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https://www.readbyqxmd.com/read/29331354/specificity-in-etiology-of-subtypes-of-bipolar-disorder-evidence-from-a-swedish-population-based-family-study
#1
Jie Song, Ralf Kuja-Halkola, Arvid Sjölander, Sarah E Bergen, Henrik Larsson, Mikael Landén, Paul Lichtenstein
BACKGROUND: Uncertainty remains whether bipolar I disorder (BDI) and bipolar II disorder (BDII) differ etiologically. We used a population-based family sample to examine the etiological boundaries between BDI and BDII by assessing their familial aggregation/coaggregation and by assessing the coaggregation between them and schizophrenia, depression, attention-deficit/hyperactivity disorder, eating disorders, autism spectrum disorder, substance use disorders, anxiety disorders, and personality disorders...
November 20, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29328753/a-critical-analysis-of-the-perioperative-management-of-patients-with-ehlers-danlos-type-iv-vascular-syndrome
#2
Justyna Martin
This article discusses the perioperative care needs of patients with Ehlers Danlos type IV (vascular) syndrome. Ehlers Danlos syndrome (EDS) is a heritable group of connective tissue disorders characterised by varying degrees of tissue, blood vessel and internal organ fragility as well as skin and joint hypermobility (De Paepe and Malfait 2012).
September 2017: Journal of Perioperative Practice
https://www.readbyqxmd.com/read/29325848/a-genetic-investigation-of-sex-bias-in-the-prevalence-of-attention-deficit-hyperactivity-disorder
#3
Joanna Martin, Raymond K Walters, Ditte Demontis, Manuel Mattheisen, S Hong Lee, Elise Robinson, Isabell Brikell, Laura Ghirardi, Henrik Larsson, Paul Lichtenstein, Nicholas Eriksson, Thomas Werge, Preben Bo Mortensen, Marianne Giørtz Pedersen, Ole Mors, Merete Nordentoft, David M Hougaard, Jonas Bybjerg-Grauholm, Naomi R Wray, Barbara Franke, Stephen V Faraone, Michael C O'Donovan, Anita Thapar, Anders D Børglum, Benjamin M Neale
BACKGROUND: Attention-deficit/hyperactivity disorder (ADHD) shows substantial heritability and is two to seven times more common in male individuals than in female individuals. We examined two putative genetic mechanisms underlying this sex bias: sex-specific heterogeneity and higher burden of risk in female cases. METHODS: We analyzed genome-wide autosomal common variants from the Psychiatric Genomics Consortium and iPSYCH Project (n = 20,183 cases, n = 35,191 controls) and Swedish population register data (n = 77,905 cases, n = 1,874,637 population controls)...
December 2, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29325608/mitochondrial-diseases
#4
Ryan L Davis, Christina Liang, Carolyn M Sue
Mitochondrial diseases collectively describe a diverse group of heritable disorders that invariably affect mitochondrial respiratory chain function and cellular energy production. Together they represent the most common cause of inherited metabolic disease, may present at any age, have a wide spectrum of clinical manifestations, may be insidious in onset, and potentially have high morbidity and mortality. Due to the presence of mitochondria in all nucleated cells, mitochondrial disease can affect many different tissues, with single or multiple systems being involved...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29325606/repeat-expansion-diseases
#5
Henry Paulson
More than 40 diseases, most of which primarily affect the nervous system, are caused by expansions of simple sequence repeats dispersed throughout the human genome. Expanded trinucleotide repeat diseases were discovered first and remain the most frequent. More recently tetra-, penta-, hexa-, and even dodeca-nucleotide repeat expansions have been identified as the cause of human disease, including some of the most common genetic disorders seen by neurologists. Repeat expansion diseases include both causes of myotonic dystrophy (DM1 and DM2), the most common genetic cause of amyotrophic lateral sclerosis/frontotemporal dementia (C9ORF72), Huntington disease, and eight other polyglutamine disorders, including the most common forms of dominantly inherited ataxia, the most common recessive ataxia (Friedreich ataxia), and the most common heritable mental retardation (fragile X syndrome)...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29317602/genome-wide-meta-analyses-of-stratified-depression-in-generation-scotland-and-uk-biobank
#6
Lynsey S Hall, Mark J Adams, Aleix Arnau-Soler, Toni-Kim Clarke, David M Howard, Yanni Zeng, Gail Davies, Saskia P Hagenaars, Ana Maria Fernandez-Pujals, Jude Gibson, Eleanor M Wigmore, Thibaud S Boutin, Caroline Hayward, Generation Scotland, David J Porteous, Ian J Deary, Pippa A Thomson, Chris S Haley, Andrew M McIntosh
Few replicable genetic associations for Major Depressive Disorder (MDD) have been identified. Recent studies of MDD have identified common risk variants by using a broader phenotype definition in very large samples, or by reducing phenotypic and ancestral heterogeneity. We sought to ascertain whether it is more informative to maximize the sample size using data from all available cases and controls, or to use a sex or recurrent stratified subset of affected individuals. To test this, we compared heritability estimates, genetic correlation with other traits, variance explained by MDD polygenic score, and variants identified by genome-wide meta-analysis for broad and narrow MDD classifications in two large British cohorts - Generation Scotland and UK Biobank...
January 10, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29317598/enriched-expression-of-genes-associated-with-autism-spectrum-disorders-in-human-inhibitory-neurons
#7
Ping Wang, Dejian Zhao, Herbert M Lachman, Deyou Zheng
Autism spectrum disorder (ASD) is highly heritable but genetically heterogeneous. The affected neural circuits and cell types remain unclear and may vary at different developmental stages. By analyzing multiple sets of human single cell transcriptome profiles, we found that ASD candidates showed relatively enriched gene expression in neurons, especially in inhibitory neurons. ASD candidates were also more likely to be the hubs of the co-expression gene module that is highly expressed in inhibitory neurons, a feature not detected for excitatory neurons...
January 10, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29316088/beyond-genome-wide-significance-integrative-approaches-to-the-interpretation-and-extension-of-gwas-findings-for-alcohol-use-disorder
#8
Jessica E Salvatore, Shizhong Han, Sean P Farris, Kristin M Mignogna, Michael F Miles, Arpana Agrawal
Alcohol use disorder (AUD) is a heritable complex behavior. Due to the highly polygenic nature of AUD, identifying genetic variants that comprise this heritable variation has proved to be challenging. With the exception of functional variants in alcohol metabolizing genes (e.g. ADH1B and ALDH2), few other candidate loci have been confidently linked to AUD. Genome-wide association studies (GWAS) of AUD and other alcohol-related phenotypes have either produced few hits with genome-wide significance or have failed to replicate on further study...
January 9, 2018: Addiction Biology
https://www.readbyqxmd.com/read/29315404/interplay-between-rnaseh2-and-mov10-controls-line-1-retrotransposition
#9
Jongsu Choi, Sung-Yeon Hwang, Kwangseog Ahn
Long interspersed nuclear element 1 is an autonomous non-long terminal repeat retrotransposon that comprises ∼17% of the human genome. Its spontaneous retrotransposition and the accumulation of heritable L1 insertions can potentially result in genome instability and sporadic disorders. Moloney leukemia virus 10 homolog (MOV10), a putative RNA helicase, has been implicated in inhibiting L1 replication, although its underlying mechanism of action remains obscure. Moreover, the physiological relevance of MOV10-mediated L1 regulation in human disease has not yet been examined...
January 5, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29314180/what-s-new-in-atopic-eczema-an-analysis-of-systematic-reviews-published-in-2015-part-1-epidemiology-and-methodology
#10
REVIEW
E Davies, N K Rogers, A Lloyd-Lavery, D J C Grindlay, K S Thomas
This review forms part of a series of annual updates that summarize the evidence base for atopic eczema (AE), providing a succinct guide for clinicians and patients. It provides a summary of key findings from 15 systematic reviews that were published during 2015, and focuses on the epidemiology and methodology issues of AE. For systematic reviews on the prevention and treatment of AE, see Part 2 of this update. The worldwide prevalence of AE during childhood has been calculated to be 7.89% (95% CI 7.88-7.89), based on studies of 1 430 329 children from 102 countries...
January 4, 2018: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/29309923/dermal-fibroblast-to-myofibroblast-transition-sustained-by-%C3%AE-v%C3%A3-3-integrin-ilk-snail1-slug-signaling-is-a-common-feature-for-hypermobile-ehlers-danlos-syndrome-and-hypermobility-spectrum-disorders
#11
Nicoletta Zoppi, Nicola Chiarelli, Silvia Binetti, Marco Ritelli, Marina Colombi
Hypermobile Ehlers-Danlos syndrome (hEDS) is a heritable connective tissue disorder with unknown molecular basis mainly characterized by generalized joint hypermobility, joint instability complications and minor skin changes. The phenotypic spectrum is broad and includes multiple associated symptoms shared with chronic inflammatory systemic diseases. The stricter criteria defined in the 2017 EDS nosology leave without an identity many individuals with symptomatic joint hypermobility and/or features of hEDS; for these patients, the term Hypermobility Spectrum Disorders (HSD) was introduced...
January 5, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29304112/a-complex-network-approach-reveals-a-pivotal-substructure-of-genes-linked-to-schizophrenia
#12
Alfonso Monaco, Anna Monda, Nicola Amoroso, Alessandro Bertolino, Giuseppe Blasi, Pasquale Di Carlo, Marco Papalino, Giulio Pergola, Sabina Tangaro, Roberto Bellotti
Research on brain disorders with a strong genetic component and complex heritability, such as schizophrenia, has led to the development of brain transcriptomics. This field seeks to gain a deeper understanding of gene expression, a key factor in exploring further research issues. Our study focused on how genes are associated amongst each other. In this perspective, we have developed a novel data-driven strategy for characterizing genetic modules, i.e., clusters of strongly interacting genes. The aim was to uncover a pivotal community of genes linked to a target gene for schizophrenia...
2018: PloS One
https://www.readbyqxmd.com/read/29302221/genetics-of-addictive-behavior-the-example-of-nicotine-dependence
#13
Philip Gorwood, Yann Le Strat, Nicolas Ramoz
The majority of addictive disorders have a significant heritability-roughly around 50%. Surprisingly, the most convincing association (a nicotinic acetylcholine receptor CHRNA5-A3-B4 gene cluster in nicotine dependence), with a unique attributable risk of 14%, was detected through a genome-wide association study (GWAS) on lung cancer, although lung cancer has a low heritability. We propose some explanations of this finding, potentially helping to understand how a GWAS strategy can be successful. Many endophenotypes were also assessed as potentially modulating the effect of nicotine, indirectly facilitating the development of nicotine dependence...
September 2017: Dialogues in Clinical Neuroscience
https://www.readbyqxmd.com/read/29296746/genetic-variants-in-adamts13-as-well-as-smoking-are-major-determinants-of-plasma-adamts13-levels
#14
Qianyi Ma, Paula M Jacobi, Brian T Emmer, Colin A Kretz, Ayse Bilge Ozel, Beth McGee, Chava Kimchi-Sarfaty, David Ginsburg, Jun Z Li, Karl C Desch
The metalloprotease ADAMTS13 cleaves von Willebrand factor (VWF) in circulating blood, limiting the size of VWF multimers and regulating VWF activity. Abnormal regulation of VWF contributes to bleeding and to thrombotic disorders. ADAMTS13 levels in plasma are highly variable among healthy individuals, although the heritability and the genetic determinants of this variation are unclear. We performed genome-wide association studies of plasma ADAMTS13 concentrations in 3244 individuals from 2 independent cohorts of healthy individuals...
June 27, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296734/gene-correction-of-hax1-reversed-kostmann-disease-phenotype-in-patient-specific-induced-pluripotent-stem-cells
#15
Erik Pittermann, Nico Lachmann, Glenn MacLean, Stephan Emmrich, Mania Ackermann, Gudrun Göhring, Brigitte Schlegelberger, Karl Welte, Axel Schambach, Dirk Heckl, Stuart H Orkin, Tobias Cantz, Jan-Henning Klusmann
Severe congenital neutropenia (SCN, Kostmann disease) is a heritable disorder characterized by a granulocytic maturation arrest. Biallelic mutations in HCLS1 associated protein X-1 (HAX1) are frequently detected in affected individuals, including those of the original pedigree described by Kostmann in 1956. To date, no faithful animal model has been established to study SCN mediated by HAX1 deficiency. Here we demonstrate defective neutrophilic differentiation and compensatory monocyte overproduction from patient-derived induced pluripotent stem cells (iPSCs) carrying the homozygous HAX1W44X nonsense mutation...
June 13, 2017: Blood Advances
https://www.readbyqxmd.com/read/29289333/understanding-neurodevelopmental-disorders-the-promise-of-regulatory-variation-in-the-3-utrome
#16
REVIEW
Kai A Wanke, Paolo Devanna, Sonja C Vernes
Neurodevelopmental disorders have a strong genetic component, but despite widespread efforts, the specific genetic factors underlying these disorders remain undefined for a large proportion of affected individuals. Given the accessibility of exome sequencing, this problem has thus far been addressed from a protein-centric standpoint; however, protein-coding regions only make up ∼1% to 2% of the human genome. With the advent of whole genome sequencing we are in the midst of a paradigm shift as it is now possible to interrogate the entire sequence of the human genome (coding and noncoding) to fill in the missing heritability of complex disorders...
November 14, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29285457/osteogenesis-imperfecta
#17
REVIEW
Justin Easow Sam, Mala Dharmalingam
Osteogenesis imperfecta is a common heritable connective tissue disorder. Nearly ninety percent are due to Type I collagen mutations. Type I-IV are autosomal dominant, and Type VI-XIII are autosomal recessive. They are Graded 1-5 based on severity. Genomic testing is done by collagen analysis from fibroblasts. The mainstay of treatment is bisphosphonate therapy. The prognosis is variable.
November 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29276006/wnt-signaling-perturbations-underlie-the-genetic-heterogeneity-of-robinow-syndrome
#18
Janson J White, Juliana F Mazzeu, Zeynep Coban-Akdemir, Yavuz Bayram, Vahid Bahrambeigi, Alexander Hoischen, Bregje W M van Bon, Alper Gezdirici, Elif Yilmaz Gulec, Francis Ramond, Renaud Touraine, Julien Thevenon, Marwan Shinawi, Erin Beaver, Jennifer Heeley, Julie Hoover-Fong, Ceren D Durmaz, Halil Gurhan Karabulut, Ebru Marzioglu-Ozdemir, Atilla Cayir, Mehmet B Duz, Mehmet Seven, Susan Price, Barbara Merfort Ferreira, Angela M Vianna-Morgante, Sian Ellard, Andrew Parrish, Karen Stals, Josue Flores-Daboub, Shalini N Jhangiani, Richard A Gibbs, Han G Brunner, V Reid Sutton, James R Lupski, Claudia M B Carvalho
Locus heterogeneity characterizes a variety of skeletal dysplasias often due to interacting or overlapping signaling pathways. Robinow syndrome is a skeletal disorder historically refractory to molecular diagnosis, potentially stemming from substantial genetic heterogeneity. All current known pathogenic variants reside in genes within the noncanonical Wnt signaling pathway including ROR2, WNT5A, and more recently, DVL1 and DVL3. However, ∼70% of autosomal-dominant Robinow syndrome cases remain molecularly unsolved...
December 16, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29274962/genetic-parameters-for-body-weight-from-birth-to-calving-and-associations-between-weights-with-test-day-health-and-female-fertility-traits
#19
T Yin, S König
A data set including 57,868 records for calf birth weight (CABW) and 9,462 records for weight at first insemination (IBW) were used for the estimation of direct and maternal genetic effects in Holstein Friesian dairy cattle. Furthermore, CABW and IBW were correlated with test-day production records and health traits in first-lactation cows, and with nonreturn rates in heifers. Health traits considered overall disease categories from the International Committee for Animal Recording diagnosis key, including the general disease status, diarrhea, respiratory diseases, mastitis, claw disorders, female fertility disorders, and metabolic disorders...
December 20, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29259572/genetic-and-environmental-influences-on-gambling-a-meta-analysis-of-twin-studies
#20
REVIEW
Yan-Hua Xuan, Shu Li, Rui Tao, Jie Chen, Li-Lin Rao, X T Wang, Rui Zheng
Disentangling the genetic and environmental influences of gambling is important for explaining the roots of individual differences in gambling behavior and providing guidance for precaution and intervention, but we are unaware of any comprehensive and systematic quantitative meta-analysis. We systematically identified 18 twin studies on gambling in the meta-analysis. The correlation coefficients within monozygotic (MZ) and dizygotic (DZ) twins, along with the corresponding sample size, were used to calculate the proportion of the total variance accounted for by additive genes (A), dominant genes (D), the shared environment (C), and the non-shared environment plus measurement error (E)...
2017: Frontiers in Psychology
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