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1.
Pediatrics ; 2024 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-39380538

RESUMO

BACKGROUND: Leaving the hospital against medical advice (AMA) reflects a breakdown in the family-clinician relationship and creates ethical dilemmas in inpatient pediatric care. There are no national data on frequency or characteristics of leaving AMA from US children's hospitals. METHODS: We performed a retrospective cohort study of hospital discharges for children under 18 years old from January 1, 2018 to December 31, 2022 in 43 children's hospitals in the Pediatric Health Information System (PHIS) database. The primary outcome was leaving AMA. Exposures were demographic, geographic, and clinical characteristics. We used multivariable mixed effects logistic regression models to assess independent factors associated with leaving AMA and all-cause 14-day hospital readmission. RESULTS: Among 3 672 243 included inpatient encounters, 2972 (0.08%) ended in leaving AMA. Compared with non-Hispanic white patients, non-Hispanic Black patients had higher odds of leaving AMA (adjusted odds ratio [aOR] 1.31 [95% confidence interval (CI) 1.19-1.44]), whereas Hispanic patients (aOR 0.66 [95% CI 0.59-0.75]) had lower odds of leaving AMA. Hospitalizations for patients with noncommercial insurance were more likely to end in leaving AMA. Leaving AMA was associated with increased odds of 14-day inpatient readmission (aOR 1.41 [95% CI 1.24-1.61]) compared with patients who did not leave AMA. There was substantial interhospital variability in standardized rates of leaving AMA (range 0.18-2.14 discharges per 1000 inpatient encounters). CONCLUSIONS: Approximately 1 in 1235 inpatient encounters ended in leaving AMA. Non-Hispanic Black patients had increased odds of leaving AMA. Leaving AMA was associated with increased odds of 14-day readmission.

2.
Eur J Hum Genet ; 32(9): 1045-1052, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38972962

RESUMO

Cardiomyopathies are a group of inherited heart muscle disorders. Expressivity is variable and while sometimes mild, complications can result in sudden cardiac death (SCD) at any age, heart failure and stroke. In around a third of patients a monogenic cause is identifiable, and development of genetic therapies that aim to correct the underlying genetic defect is underway. Here we describe results of a survey designed to understand preliminary views of the patient community about genetic therapies in the context of disease burden. The internet survey was publicized with a bespoke information video via patient support groups in the UK and USA; 634 people responded of whom 96% had a personal and/or family history of cardiomyopathy. Findings show that concern about cardiomyopathy-related issues with a future dimension, such as disease progression, is significantly greater than concern about current issues. A total of 93.6% thought that genetic therapies should be developed for cardiomyopathy. A majority would consider participation in a genetic therapy trial in six scenarios varying by age and clinical situation significantly more in the scenario of an adult with symptomatic disease and evident progression than an asymptomatic adult with SCD risk, or a child. In all scenarios, a majority said that the chance genetic therapy would stop or slow progression, and risk of serious adverse and unintended effects, were important considerations. Qualitative analysis of free-text responses found that concern was often informed by family experience. Patient consideration of genetic therapy is likely to require individualized assessment of the benefits and risks.


Assuntos
Cardiomiopatias , Terapia Genética , Humanos , Cardiomiopatias/genética , Cardiomiopatias/terapia , Adulto , Masculino , Pessoa de Meia-Idade , Feminino , Idoso , Inquéritos e Questionários , Adolescente
3.
Hum Mol Genet ; 33(10): 919-929, 2024 May 04.
Artigo em Inglês | MEDLINE | ID: mdl-38339995

RESUMO

The clinical severity of sickle cell disease (SCD) is strongly influenced by the level of fetal haemoglobin (HbF) persistent in each patient. Three major HbF loci (BCL11A, HBS1L-MYB, and Xmn1-HBG2) have been reported, but a considerable hidden heritability remains. We conducted a genome-wide association study for HbF levels in 1006 Nigerian patients with SCD (HbSS/HbSß0), followed by a replication and meta-analysis exercise in four independent SCD cohorts (3,582 patients). To dissect association signals at the major loci, we performed stepwise conditional and haplotype association analyses and included public functional annotation datasets. Association signals were detected for BCL11A (lead SNP rs6706648, ß = -0.39, P = 4.96 × 10-34) and HBS1L-MYB (lead SNP rs61028892, ß = 0.73, P = 1.18 × 10-9), whereas the variant allele for Xmn1-HBG2 was found to be very rare. In addition, we detected three putative new trait-associated regions. Genetically, dissecting the two major loci BCL11A and HBS1L-MYB, we defined trait-increasing haplotypes (P < 0.0001) containing so far unidentified causal variants. At BCL11A, in addition to a haplotype harbouring the putative functional variant rs1427407-'T', we identified a second haplotype, tagged by the rs7565301-'A' allele, where a yet-to-be-discovered causal DNA variant may reside. Similarly, at HBS1L-MYB, one HbF-increasing haplotype contains the likely functional small indel rs66650371, and a second tagged by rs61028892-'C' is likely to harbour a presently unknown functional allele. Together, variants at BCL11A and HBS1L-MYB SNPs explained 24.1% of the trait variance. Our findings provide a path for further investigation of the causes of variable fetal haemoglobin persistence in sickle cell disease.


Assuntos
Anemia Falciforme , Proteínas de Ligação ao GTP , Estudo de Associação Genômica Ampla , Haplótipos , Feminino , Humanos , Masculino , Alelos , Anemia Falciforme/genética , Anemia Falciforme/sangue , Predisposição Genética para Doença , Nigéria , Proteínas Nucleares/genética , Polimorfismo de Nucleotídeo Único/genética , Proteínas Repressoras/genética
4.
Nat Genet ; 55(9): 1448-1461, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37679419

RESUMO

Conventional measurements of fasting and postprandial blood glucose levels investigated in genome-wide association studies (GWAS) cannot capture the effects of DNA variability on 'around the clock' glucoregulatory processes. Here we show that GWAS meta-analysis of glucose measurements under nonstandardized conditions (random glucose (RG)) in 476,326 individuals of diverse ancestries and without diabetes enables locus discovery and innovative pathophysiological observations. We discovered 120 RG loci represented by 150 distinct signals, including 13 with sex-dimorphic effects, two cross-ancestry and seven rare frequency signals. Of these, 44 loci are new for glycemic traits. Regulatory, glycosylation and metagenomic annotations highlight ileum and colon tissues, indicating an underappreciated role of the gastrointestinal tract in controlling blood glucose. Functional follow-up and molecular dynamics simulations of lower frequency coding variants in glucagon-like peptide-1 receptor (GLP1R), a type 2 diabetes treatment target, reveal that optimal selection of GLP-1R agonist therapy will benefit from tailored genetic stratification. We also provide evidence from Mendelian randomization that lung function is modulated by blood glucose and that pulmonary dysfunction is a diabetes complication. Our investigation yields new insights into the biology of glucose regulation, diabetes complications and pathways for treatment stratification.


Assuntos
Diabetes Mellitus Tipo 2 , Glucose , Humanos , Estudo de Associação Genômica Ampla , Glicemia/genética , Diabetes Mellitus Tipo 2/genética , Colo
5.
Circ Genom Precis Med ; 16(3): 207-215, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37017090

RESUMO

BACKGROUND: A large proportion of genetic risk remains unexplained for structural heart disease involving the interventricular septum (IVS) including hypertrophic cardiomyopathy and ventricular septal defects. This study sought to develop a reproducible proxy of IVS structure from standard medical imaging, discover novel genetic determinants of IVS structure, and relate these loci to diseases of the IVS, hypertrophic cardiomyopathy, and ventricular septal defect. METHODS: We estimated the cross-sectional area of the IVS from the 4-chamber view of cardiac magnetic resonance imaging in 32 219 individuals from the UK Biobank which was used as the basis of genome wide association studies and Mendelian randomization. RESULTS: Measures of IVS cross-sectional area at diastole were a strong proxy for the 3-dimensional volume of the IVS (Pearson r=0.814, P=0.004), and correlated with anthropometric measures, blood pressure, and diagnostic codes related to cardiovascular physiology. Seven loci with clear genomic consequence and relevance to cardiovascular biology were uncovered by genome wide association studies, most notably a single nucleotide polymorphism in an intron of CDKN1A (rs2376620; ß, 7.7 mm2 [95% CI, 5.8-11.0]; P=6.0×10-10), and a common inversion incorporating KANSL1 predicted to disrupt local chromatin structure (ß, 8.4 mm2 [95% CI, 6.3-10.9]; P=4.2×10-14). Mendelian randomization suggested that inheritance of larger IVS cross-sectional area at diastole was strongly associated with hypertrophic cardiomyopathy risk (pIVW=4.6×10-10) while inheritance of smaller IVS cross-sectional area at diastole was associated with risk for ventricular septal defect (pIVW=0.007). CONCLUSIONS: Automated estimates of cross-sectional area of the IVS supports discovery of novel loci related to cardiac development and Mendelian disease. Inheritance of genetic liability for either small or large IVS, appears to confer risk for ventricular septal defect or hypertrophic cardiomyopathy, respectively. These data suggest that a proportion of risk for structural and congenital heart disease can be localized to the common genetic determinants of size and shape of cardiovascular anatomy.


Assuntos
Cardiomiopatia Hipertrófica , Comunicação Interventricular , Humanos , Estudo de Associação Genômica Ampla , Cardiomiopatia Hipertrófica/diagnóstico por imagem , Cardiomiopatia Hipertrófica/genética , Cardiomiopatia Hipertrófica/complicações , Comunicação Interventricular/diagnóstico por imagem , Comunicação Interventricular/genética , Comunicação Interventricular/complicações , Coração , Imageamento por Ressonância Magnética
6.
Nat Commun ; 14(1): 1411, 2023 03 14.
Artigo em Inglês | MEDLINE | ID: mdl-36918541

RESUMO

The 3-dimensional spatial and 2-dimensional frontal QRS-T angles are measures derived from the vectorcardiogram. They are independent risk predictors for arrhythmia, but the underlying biology is unknown. Using multi-ancestry genome-wide association studies we identify 61 (58 previously unreported) loci for the spatial QRS-T angle (N = 118,780) and 11 for the frontal QRS-T angle (N = 159,715). Seven out of the 61 spatial QRS-T angle loci have not been reported for other electrocardiographic measures. Enrichments are observed in pathways related to cardiac and vascular development, muscle contraction, and hypertrophy. Pairwise genome-wide association studies with classical ECG traits identify shared genetic influences with PR interval and QRS duration. Phenome-wide scanning indicate associations with atrial fibrillation, atrioventricular block and arterial embolism and genetically determined QRS-T angle measures are associated with fascicular and bundle branch block (and also atrioventricular block for the frontal QRS-T angle). We identify potential biology involved in the QRS-T angle and their genetic relationships with cardiovascular traits and diseases, may inform future research and risk prediction.


Assuntos
Bloqueio Atrioventricular , Doenças Cardiovasculares , Humanos , Doenças Cardiovasculares/genética , Estudo de Associação Genômica Ampla , Fatores de Risco , Arritmias Cardíacas/genética , Eletrocardiografia/métodos , Biomarcadores
7.
Circ Genom Precis Med ; 16(1): e003716, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36598836

RESUMO

BACKGROUND: Left ventricular maximum wall thickness (LVMWT) is an important biomarker of left ventricular hypertrophy and provides diagnostic and prognostic information in hypertrophic cardiomyopathy (HCM). Limited information is available on the genetic determinants of LVMWT. METHODS: We performed a genome-wide association study of LVMWT measured from the cardiovascular magnetic resonance examinations of 42 176 European individuals. We evaluated the genetic relationship between LVMWT and HCM by performing pairwise analysis using the data from the Hypertrophic Cardiomyopathy Registry in which the controls were randomly selected from UK Biobank individuals not included in the cardiovascular magnetic resonance sub-study. RESULTS: Twenty-one genetic loci were discovered at P<5×10-8. Several novel candidate genes were identified including PROX1, PXN, and PTK2, with known functional roles in myocardial growth and sarcomere organization. The LVMWT genetic risk score is predictive of HCM in the Hypertrophic Cardiomyopathy Registry (odds ratio per SD: 1.18 [95% CI, 1.13-1.23]) with pairwise analyses demonstrating a moderate genetic correlation (rg=0.53) and substantial loci overlap (19/21). CONCLUSIONS: Our findings provide novel insights into the genetic underpinning of LVMWT and highlight its shared genetic background with HCM, supporting future endeavours to elucidate the genetic etiology of HCM.


Assuntos
Cardiomiopatia Hipertrófica , Hipertrofia Ventricular Esquerda , Humanos , Bancos de Espécimes Biológicos , Cardiomiopatia Hipertrófica/diagnóstico , Cardiomiopatia Hipertrófica/genética , Estudo de Associação Genômica Ampla , Hipertrofia Ventricular Esquerda/diagnóstico , Hipertrofia Ventricular Esquerda/genética , Reino Unido
8.
Nat Genet ; 54(12): 1803-1815, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36474045

RESUMO

The discovery of genetic loci associated with complex diseases has outpaced the elucidation of mechanisms of disease pathogenesis. Here we conducted a genome-wide association study (GWAS) for coronary artery disease (CAD) comprising 181,522 cases among 1,165,690 participants of predominantly European ancestry. We detected 241 associations, including 30 new loci. Cross-ancestry meta-analysis with a Japanese GWAS yielded 38 additional new loci. We prioritized likely causal variants using functionally informed fine-mapping, yielding 42 associations with less than five variants in the 95% credible set. Similarity-based clustering suggested roles for early developmental processes, cell cycle signaling and vascular cell migration and proliferation in the pathogenesis of CAD. We prioritized 220 candidate causal genes, combining eight complementary approaches, including 123 supported by three or more approaches. Using CRISPR-Cas9, we experimentally validated the effect of an enhancer in MYO9B, which appears to mediate CAD risk by regulating vascular cell motility. Our analysis identifies and systematically characterizes >250 risk loci for CAD to inform experimental interrogation of putative causal mechanisms for CAD.


Assuntos
Doença da Artéria Coronariana , Humanos , Doença da Artéria Coronariana/genética , Estudo de Associação Genômica Ampla
9.
Genet Epidemiol ; 46(1): 51-62, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-34672391

RESUMO

Type 2 diabetes (T2D) is an important heritable risk factor for coronary artery disease (CAD), the risk of both diseases being increased by metabolic syndrome (MS). With the availability of large-scale genome-wide association data, we aimed to elucidate the genetic burden of CAD risk in T2D predisposed individuals within the context of MS and their shared genetic architecture. Mendelian randomization (MR) analyses supported a causal relationship between T2D and CAD [odds ratio (OR) = 1.13 per log-odds unit 95% confidence interval (CI): 1.10-1.16; p = 1.59 × 10-17 ]. Simultaneously adjusting MR analyses for the effects of the T2D instrument including blood pressure, dyslipidaemia, and obesity attenuated the association between T2D and CAD (OR = 1.07, 95% CI: 1.04-1.11). Bayesian locus-overlap analysis identified 44 regions with the same causal variant underlying T2D and CAD genetic signals (FDR < 1%) at a posterior probability >0.7; five (MHC, LPL, ABO, RAI1 and MC4R) of these regions contain genome-wide significant (p < 5 × 10-8 ) associations for both traits. Given the small effect sizes observed in genome-wide association studies for complex diseases, even with 44 potential target regions, this has implications for the likely magnitude of CAD risk reduction that might be achievable by pure T2D therapies.


Assuntos
Doença da Artéria Coronariana , Diabetes Mellitus Tipo 2 , Teorema de Bayes , Doença da Artéria Coronariana/epidemiologia , Doença da Artéria Coronariana/genética , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/epidemiologia , Diabetes Mellitus Tipo 2/genética , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Humanos , Análise da Randomização Mendeliana , Polimorfismo de Nucleotídeo Único , Fatores de Risco
11.
Nat Genet ; 53(2): 135-142, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33495597

RESUMO

Hypertrophic cardiomyopathy (HCM) is a common, serious, genetic heart disorder. Rare pathogenic variants in sarcomere genes cause HCM, but with unexplained phenotypic heterogeneity. Moreover, most patients do not carry such variants. We report a genome-wide association study of 2,780 cases and 47,486 controls that identified 12 genome-wide-significant susceptibility loci for HCM. Single-nucleotide polymorphism heritability indicated a strong polygenic influence, especially for sarcomere-negative HCM (64% of cases; h2g = 0.34 ± 0.02). A genetic risk score showed substantial influence on the odds of HCM in a validation study, halving the odds in the lowest quintile and doubling them in the highest quintile, and also influenced phenotypic severity in sarcomere variant carriers. Mendelian randomization identified diastolic blood pressure (DBP) as a key modifiable risk factor for sarcomere-negative HCM, with a one standard deviation increase in DBP increasing the HCM risk fourfold. Common variants and modifiable risk factors have important roles in HCM that we suggest will be clinically actionable.


Assuntos
Cardiomiopatia Hipertrófica/genética , Polimorfismo de Nucleotídeo Único , Adolescente , Adulto , Idoso , Pressão Sanguínea/genética , Miosinas Cardíacas/genética , Proteínas de Transporte/genética , Estudos de Casos e Controles , Forminas/genética , Predisposição Genética para Doença , Estudo de Associação Genômica Ampla , Heterozigoto , Humanos , Pessoa de Meia-Idade , Cadeias Pesadas de Miosina/genética , Fatores de Risco , Sarcômeros/genética , Adulto Jovem
12.
Nat Commun ; 12(1): 24, 2021 01 05.
Artigo em Inglês | MEDLINE | ID: mdl-33402679

RESUMO

Differences between sexes contribute to variation in the levels of fasting glucose and insulin. Epidemiological studies established a higher prevalence of impaired fasting glucose in men and impaired glucose tolerance in women, however, the genetic component underlying this phenomenon is not established. We assess sex-dimorphic (73,089/50,404 women and 67,506/47,806 men) and sex-combined (151,188/105,056 individuals) fasting glucose/fasting insulin genetic effects via genome-wide association study meta-analyses in individuals of European descent without diabetes. Here we report sex dimorphism in allelic effects on fasting insulin at IRS1 and ZNF12 loci, the latter showing higher RNA expression in whole blood in women compared to men. We also observe sex-homogeneous effects on fasting glucose at seven novel loci. Fasting insulin in women shows stronger genetic correlations than in men with waist-to-hip ratio and anorexia nervosa. Furthermore, waist-to-hip ratio is causally related to insulin resistance in women, but not in men. These results position dissection of metabolic and glycemic health sex dimorphism as a steppingstone for understanding differences in genetic effects between women and men in related phenotypes.


Assuntos
Anorexia Nervosa/genética , Glicemia/metabolismo , Intolerância à Glucose/genética , Proteínas Substratos do Receptor de Insulina/genética , Resistência à Insulina/genética , Insulina/sangue , Fatores de Transcrição Kruppel-Like/genética , Adulto , Anorexia Nervosa/sangue , Anorexia Nervosa/etnologia , Anorexia Nervosa/fisiopatologia , Jejum/sangue , Feminino , Expressão Gênica , Loci Gênicos , Estudo de Associação Genômica Ampla , Intolerância à Glucose/sangue , Intolerância à Glucose/etnologia , Intolerância à Glucose/fisiopatologia , Humanos , Proteínas Substratos do Receptor de Insulina/sangue , Fatores de Transcrição Kruppel-Like/sangue , Masculino , Pessoa de Meia-Idade , Fenótipo , Caracteres Sexuais , Fatores Sexuais , Relação Cintura-Quadril , População Branca
13.
Circ Genom Precis Med ; 13(6): e002769, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-33321069

RESUMO

BACKGROUND: Coronary artery disease (CAD) is accelerated in subjects with type 2 diabetes mellitus (T2D). METHODS: To test whether this reflects differential genetic influences on CAD risk in subjects with T2D, we performed a systematic assessment of genetic overlap between CAD and T2D in 66 643 subjects (27 708 with CAD and 24 259 with T2D). Variants showing apparent association with CAD in stratified analyses or evidence of interaction were evaluated in a further 117 787 subjects (16 694 with CAD and 11 537 with T2D). RESULTS: None of the previously characterized CAD loci was found to have specific effects on CAD in T2D individuals, and a genome-wide interaction analysis found no new variants for CAD that could be considered T2D specific. When we considered the overall genetic correlations between CAD and its risk factors, we found no substantial differences in these relationships by T2D background. CONCLUSIONS: This study found no evidence that the genetic architecture of CAD differs in those with T2D compared with those without T2D.


Assuntos
Doença da Artéria Coronariana/complicações , Doença da Artéria Coronariana/genética , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/genética , Predisposição Genética para Doença , Estudos de Casos e Controles , Estudo de Associação Genômica Ampla , Humanos , Metanálise como Assunto , Polimorfismo Genético , Fatores de Risco
14.
Cureus ; 12(5): e8343, 2020 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-32617217

RESUMO

Gastrointestinal stromal tumors (GISTs) are rare gastrointestinal (GI) tumors, representing a small portion of soft tissue tumors of the abdominal cavity. Extraintestinal gastrointestinal stromal tumors (EGISTs) are uncommon forms of GISTs that present outside the GI tract. There have only been a rare number of reported cases of EGIST presenting above the diaphragm. We present the case of a 50-year-old female with shortness of breath, and found to have bilateral pleural effusions and left-sided lung mass. The initial lung mass aspiration was negative for malignancy; yet, pleural fluid was suggestive of malignancy, and repeat biopsy and immunohistochemical stain were diagnostic for GIST. Ultimately, the patient underwent video-assisted thoracoscopic surgery, pleurodesis with doxycycline, and adjuvant therapy with imatinib. This is a report of primary EGIST presenting as an isolated lung lesion with no involvement of the GI tract. In patients with suspected malignancy, it is of paramount importance to obtain a detailed history, including remote signs and symptoms, while performing a thorough work-up. Especially in the lung where initial biopsies can be skewed due to inflammation and atelectasis, repeat biopsies may be necessary to obtain an accurate diagnosis.

15.
Cureus ; 12(6): e8502, 2020 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-32656018

RESUMO

Kaposi's sarcoma (KS) is a cancer that often affects individuals with human immunodeficiency virus, acquired immunodeficiency syndrome (AIDS), those who have received an organ transplant, or others who are immunocompromised. KS is a vascular tumor that most often presents in cutaneous sites, including the lower extremities, oral mucosa, and genitalia. Literature regarding KS with ocular involvement is scarce. We present a rare case in which a patient diagnosed with AIDS-associated KS exhibited ocular and diffuse manifestations. The lesions of cutaneous KS are frequently mistaken for an alternative diagnoses; therefore, the clinician should have a high index of suspicion for this vascular tumor in AIDS patients.

16.
Circ Genom Precis Med ; 13(3): e002783, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32163302

RESUMO

BACKGROUND: The common intronic deletion, MYBPC3Δ25, detected in 4% to 8% of South Asian populations, is reported to be associated with cardiomyopathy, with ≈7-fold increased risk of disease in variant carriers. Here, we examine the contribution of MYBPC3Δ25 to hypertrophic cardiomyopathy (HCM) in a large patient cohort. METHODS: Sequence data from 2 HCM cohorts (n=5393) was analyzed to determine MYBPC3Δ25 frequency and co-occurrence of pathogenic variants in HCM genes. Case-control and haplotype analyses were performed to compare variant frequencies and assess disease association. Analyses were also undertaken to investigate the pathogenicity of a candidate variant MYBPC3 c.1224-52G>A. RESULTS: Our data suggest that the risk of HCM, previously attributed to MYBPC3Δ25, can be explained by enrichment of a derived haplotype, MYBPC3Δ25/-52, whereby a small subset of individuals bear both MYBPC3Δ25 and a rare pathogenic variant, MYBPC3 c.1224-52G>A. The intronic MYBPC3 c.1224-52G>A variant, which is not routinely evaluated by gene panel or exome sequencing, was detected in ≈1% of our HCM cohort. CONCLUSIONS: The MYBPC3 c.1224-52G>A variant explains the disease risk previously associated with MYBPC3Δ25 in the South Asian population and is one of the most frequent pathogenic variants in HCM in all populations; genotyping services should ensure coverage of this deep intronic mutation. Individuals carrying MYBPC3Δ25 alone are not at increased risk of HCM, and this variant should not be tested in isolation; this is important for the large majority of the 100 million individuals of South Asian ancestry who carry MYBPC3Δ25 and would previously have been declared at increased risk of HCM.


Assuntos
Povo Asiático/genética , Sequência de Bases , Cardiomiopatia Hipertrófica/genética , Proteínas de Transporte/genética , Íntrons , Deleção de Sequência , Adulto , Idoso , Ásia , Cardiomiopatia Hipertrófica/etnologia , Estudos de Casos e Controles , Feminino , Haplótipos , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco
17.
Bioinformatics ; 36(2): 552-557, 2020 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-31350884

RESUMO

MOTIVATION: Common small-effect genetic variants that contribute to human complex traits and disease are typically identified using traditional fixed-effect (FE) meta-analysis methods. However, the power to detect genetic associations under FE models deteriorates with increasing heterogeneity, so that some small-effect heterogeneous loci might go undetected. A modified random-effects meta-analysis approach (RE2) was previously developed that is more powerful than traditional fixed and random-effects methods at detecting small-effect heterogeneous genetic associations, the method was updated (RE2C) to identify small-effect heterogeneous variants overlooked by traditional fixed-effect meta-analysis. Here, we re-appraise a large-scale meta-analysis of coronary disease with RE2C to search for small-effect genetic signals potentially masked by heterogeneity in a FE meta-analysis. RESULTS: Our application of RE2C suggests a high sensitivity but low specificity of this approach for discovering small-effect heterogeneous genetic associations. We recommend that reports of small-effect heterogeneous loci discovered with RE2C are accompanied by forest plots and standardized predicted random-effects statistics to reveal the distribution of genetic effect estimates across component studies of meta-analyses, highlighting overly influential outlier studies with the potential to inflate genetic signals. AVAILABILITY AND IMPLEMENTATION: Scripts to calculate standardized predicted random-effects statistics and generate forest plots are available in the getspres R package entitled from https://magosil86.github.io/getspres/. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online.


Assuntos
Doença da Artéria Coronariana , Estudo de Associação Genômica Ampla , Humanos , Herança Multifatorial , Projetos de Pesquisa
18.
Cardiovasc Res ; 116(11): 1863-1874, 2020 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-31584065

RESUMO

AIMS: Genome-wide association studies (GWAS) have consistently identified an association between coronary artery disease (CAD) and a locus on chromosome 10 containing a single gene, JCAD (formerly KIAA1462). However, little is known about the mechanism by which JCAD could influence the development of atherosclerosis. METHODS AND RESULTS: Vascular function was quantified in subjects with CAD by flow-mediated dilatation (FMD) and vasorelaxation responses in isolated blood vessel segments. The JCAD risk allele identified by GWAS was associated with reduced FMD and reduced endothelial-dependent relaxations. To study the impact of loss of Jcad on atherosclerosis, Jcad-/- mice were crossed to an ApoE-/- background and fed a high-fat diet from 6 to16 weeks of age. Loss of Jcad did not affect blood pressure or heart rate. However, Jcad-/-ApoE-/- mice developed significantly less atherosclerosis in the aortic root and the inner curvature of the aortic arch. En face analysis revealed a striking reduction in pro-inflammatory adhesion molecules at sites of disturbed flow on the endothelial cell layer of Jcad-/- mice. Loss of Jcad lead to a reduced recovery perfusion in response to hind limb ischaemia, a model of altered in vivo flow. Knock down of JCAD using siRNA in primary human aortic endothelial cells significantly reduced the response to acute onset of flow, as evidenced by reduced phosphorylation of NF-КB, eNOS, and Akt. CONCLUSION: The novel CAD gene JCAD promotes atherosclerotic plaque formation via a role in the endothelial cell shear stress mechanotransduction pathway.


Assuntos
Doenças da Aorta/metabolismo , Aterosclerose/metabolismo , Moléculas de Adesão Celular/metabolismo , Doença da Artéria Coronariana/metabolismo , Circulação Coronária , Endotélio Vascular/metabolismo , Membro Posterior/irrigação sanguínea , Mecanotransdução Celular , Animais , Aorta/metabolismo , Aorta/fisiopatologia , Doenças da Aorta/genética , Doenças da Aorta/fisiopatologia , Doenças da Aorta/prevenção & controle , Aterosclerose/genética , Aterosclerose/fisiopatologia , Aterosclerose/prevenção & controle , Moléculas de Adesão Celular/genética , Células Cultivadas , Doença da Artéria Coronariana/genética , Doença da Artéria Coronariana/fisiopatologia , Vasos Coronários/metabolismo , Vasos Coronários/fisiopatologia , Modelos Animais de Doenças , Endotélio Vascular/fisiopatologia , Estudo de Associação Genômica Ampla , Humanos , Isquemia/genética , Isquemia/metabolismo , Isquemia/fisiopatologia , Masculino , Camundongos Endogâmicos C57BL , Camundongos Knockout para ApoE , NF-kappa B/metabolismo , Óxido Nítrico Sintase Tipo III/metabolismo , Fosforilação , Placa Aterosclerótica , Proteínas Proto-Oncogênicas c-akt , Estresse Mecânico
19.
BMC Bioinformatics ; 20(1): 610, 2019 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-31775616

RESUMO

BACKGROUND: Over the last 10 years, there have been over 3300 genome-wide association studies (GWAS). Almost every GWAS study provides a Manhattan plot either as a main figure or in the supplement. Several software packages can generate a Manhattan plot, but they are all limited in the extent to which they can annotate gene-names, allele frequencies, and variants having high impact on gene function or provide any other added information or flexibility. Furthermore, in a conventional Manhattan plot, there is no way of distinguishing a locus identified due to a single variant with very significant p-value from a locus with multiple variants which appear to be in a haplotype block having very similar p-values. RESULTS: Here we present a software tool written in R, which generates a transposed Manhattan plot along with additional features like variant consequence and minor allele frequency to annotate the plot and addresses these limitations. The software also gives flexibility on how and where the user wants to display the annotations. The software can be downloaded from CRAN repository and also from the GitHub project page. CONCLUSIONS: We present a major step up to the existing conventional Manhattan plot generation tools. We hope this form of display along with the added annotations will bring more insight to the reader from this new Manhattan++ plot.


Assuntos
Estudo de Associação Genômica Ampla/estatística & dados numéricos , Anotação de Sequência Molecular/estatística & dados numéricos , Genoma , Humanos , Polimorfismo de Nucleotídeo Único , Software
20.
Sci Rep ; 9(1): 7339, 2019 05 14.
Artigo em Inglês | MEDLINE | ID: mdl-31089183

RESUMO

CADM2 has been associated with a range of behavioural and metabolic traits, including physical activity, risk-taking, educational attainment, alcohol and cannabis use and obesity. Here, we set out to determine whether CADM2 contributes to mechanisms shared between mental and physical health disorders. We assessed genetic variants in the CADM2 locus for association with phenotypes in the UK Biobank, IMPROVE, PROCARDIS and SCARFSHEEP studies, before performing meta-analyses. A wide range of metabolic phenotypes were meta-analysed. Psychological phenotypes analysed in UK Biobank only were major depressive disorder, generalised anxiety disorder, bipolar disorder, neuroticism, mood instability and risk-taking behaviour. In UK Biobank, four, 88 and 172 genetic variants were significantly (p < 1 × 10-5) associated with neuroticism, mood instability and risk-taking respectively. In meta-analyses of 4 cohorts, we identified 362, 63 and 11 genetic variants significantly (p < 1 × 10-5) associated with BMI, SBP and CRP respectively. Genetic effects on BMI, CRP and risk-taking were all positively correlated, and were consistently inversely correlated with genetic effects on SBP, mood instability and neuroticism. Conditional analyses suggested an overlap in the signals for physical and psychological traits. Many significant variants had genotype-specific effects on CADM2 expression levels in adult brain and adipose tissues. CADM2 variants influence a wide range of both psychological and metabolic traits, suggesting common biological mechanisms across phenotypes via regulation of CADM2 expression levels in adipose tissue. Functional studies of CADM2 are required to fully understand mechanisms connecting mental and physical health conditions.


Assuntos
Transtornos de Ansiedade/genética , Transtorno Bipolar/genética , Moléculas de Adesão Celular/genética , Transtorno Depressivo Maior/genética , Obesidade/genética , Afeto , Idoso , Feminino , Predisposição Genética para Doença , Variação Genética , Humanos , Masculino , Pessoa de Meia-Idade , Neuroticismo , Polimorfismo de Nucleotídeo Único , Locos de Características Quantitativas , Assunção de Riscos
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