3613 results for "*geneti*"

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• Cellular Basis for Genetic Susceptibility to Neurodevelopmental Disorders

  In contrast to syndromic CNVs such as the 17p11.2 deletion in Smith-Magenis syndrome, which mostly occur de novo and are highly penetrant, more recent studies have identified another class of CNVs that are frequently inherited and associated with variable expressivity. We previously identified a 520-kb deletion on chromosome 16p12.1 that was associated with multiple neurodevelopmental outcomes, including intellectual disability/developmental delay (ID/DD), schizophrenia, autism, and epilepsy. This variant is inherited in >95% of cases from carrier parents manifesting neuropsychiatric features. We also found that affected children with the deletion were more likely to carry another large CNV or rare deleterious mutation elsewhere in the genome compared to carrier parents. Thus, while the 16p12.1 deletion confers significant risk for a range of disorders, the ultimate phenotypic trajectory is determined by variants in the genetic background. Functional assessment of the deletion would therefore provide a novel cellular paradigm for how the same variant confers susceptibility to distinct neurodevelopmental disorders. We used induced pluripotent stem cells (iPSCs) reprogrammed from peripheral blood mononuclear cells (PBMC) from three families with the 16p12.1 deletion, each including two or more affected children who manifest severe ID/DD or autism, carrier parents with neuropsychiatric features, and unaffected non-carrier parents. We generated neural progenitor cells (NPCs) and differentiated cortical neurons from 12 individuals from three families, including affected children with either severe ID or autism, carrier parents with neuropsychiatric features, and non-carrier parents, and assessed the impact of the deletion during different timepoints of neuronal development.

  Study phs002403

• Functional Genomics and Tumor Microenvironment Analysis Reveal Prognostic Biological Subtypes in Mantle Cell Lymphoma

  Mantle cell lymphoma (MCL) is a genetically and clinically heterogeneous B-cell malignancy. We studied two MCL cohorts with differing treatment patterns: one enriched for immunochemotherapy, the other for chemotherapy alone. TP53 alterations are consistently associated with poor prognosis, whereas ATM mutations correlate with improved outcomes following rituximab-based chemotherapy. Based on recurrent genetic events, six clusters are identified and refined into three prognostic groups: high-risk (TP53 mutations and deletions at 17p13.3, 13q14.2, and 19p13.3), intermediate-risk (ATM and epigenetic regulator mutations, or gains at 8q/17q/15q), and low-risk (lacking TP53 alterations, rare ATM mutations without 11q deletions, gains at 3q, deletions at 6q). Transcriptomic analysis reveals enrichment of proliferation, metabolism-promoting gene signatures in high-risk; angiogenesis and NOTCH signaling in intermediate-risk; and proinflammatory-related (i.e., IFNα, TNFα) in low-risk MCLs. Multi-proteomic spatial profiling using imaging mass cytometry (IMC) demonstrates enrichment of CD4⁺ T cells with high expression of exhaustion markers and a dominant population of myeloid cells skewed toward an M2-like phenotype. Spatially, TP53-perturbed MCLs are immune-infiltrated but exhausted, while ATM-perturbed cases remain immune-cold with dense tumors. Functional analysis shows that p53 represses BCR signaling through PTPN6 activation. Collectively, these findings highlight distinct molecular and immune landscapes and reveal therapeutic vulnerabilities in high-risk TP53-perturbed MCL.

  Study phs003849

• Role of Microglia Somatic Mutations in Neurodegenerative Diseases

  Somatic genetic heterogeneity resulting from post-zygotic DNA mutations is widespread in human tissues and can cause diseases, however few studies have investigated its role in neurodegenerative processes such as Alzheimer's Disease (AD). Here we report the selective enrichment of microglia clones carrying pathogenic variants, that are not present in neuronal, glia/stromal cells, or blood, from patients with AD in comparison to age-matched controls. Notably, microglia-specific AD-associated variants preferentially target the MAPK pathway, including recurrent CBL ring-domain mutations. These variants activate ERK and drive a microglia transcriptional program characterized by a strong neuro-inflammatory response, both in vitro and in patients. Although the natural history of AD-associated microglial clones is difficult to establish in human, microglial expression of a MAPK pathway activating variant was previously shown to cause neurodegeneration in mice, suggesting that AD-associated neuroinflammatory microglial clones may contribute to the neurodegenerative process in patients.

  Study phs002213

• Developmental Genotype Tissue Expression (dGTEx) Project

  Lay DescriptionThe aims of the Developmental Genotype-Tissue Expression (dGTEx) Project are to study changes in gene expression and regulation that affect both normal growth and impact health and disease in a pediatric cohort, spanning birth to age 18. Children are often underrepresented in clinical research, and most genomics studies primarily use adult donors and tissues that lack insight into specific developmental changes that occur in childhood. dGTEx researchers are studying genes from different tissues obtained from across pediatric development to create a database that researchers can use to study how genes change throughout childhood. The dGTEx project also includes a study of the donor consent process to help ensure that the goals of the project and participation in the project effectively address the concerns and expectations of donors and their families in the study.Scientific DescriptionDespite considerable variation in expression patterns across tissues and individuals, these patterns are relatively stable throughout adulthood, where most human gene expression studies have been performed. The changes in gene expression that occur during postnatal development are largely unstudied, yet lead to important milestones in health and disease, such as the onset or cessation of growth spurts or puberty, and the development of both childhood specific diseases, as well as diseases that manifest much later in life.The goal of the developmental Genotype-Tissue Expression (dGTEx) project is to establish a resource database in which to study the relationship between gene expression and other molecular phenotypes in multiple relatively healthy reference neonatal, pediatric, and adolescent tissues, building on the original (adult) GTEx project.This study aims to recruit at least 120 donors with a total of ~30 donors per age group, in each of 4 developmental windows: Infant: 0-2 yo, Early Childhood: 2-8 yo, Pre-pubertal: ~8-12.5 yo, Post-pubertal: ~12.5-18 yo. Donor tissue collection protocols have been developed to maximize the diversity of quality tissues recovered, with a minimum of 20 to a maximum of 74 different tissue sites sampled per donor.The pediatric study is complemented by the Non-Human Primate Developmental GTEx (NHP-dGTEx) project which will also catalog and analyze transcriptional profiles across a wide variety of tissues at multiple developmental stages from two species of non-human primates: Macaca mulatta (rhesus macaque), an old world monkey, and Callithrix jacchus (common marmoset), a new world monkey. The main goal of the project is to create a parallel data resource of tissues from individuals at each of 6-8 developmental stages, to enhance understanding of developmental changes and allow cross-species, temporal comparisons of gene expression, and cell-type specific gene and epigenetic data across different stages of primate development.

  Study phs003838

• CIDR: Understanding the Increased Risk of Childhood Acute Lymphoblastic Leukemia in Latinos

  This study aims to investigate the genetic contribution to the increased risk of acute lymphoblastic leukemia (ALL) in children of Hispanic/Latino ethnicity. Genome-wide single nucleotide polymorphism (SNP) genotyping was performed on childhood ALL cases and controls of self-reported Hispanic/Latino ethnicity from two studies: 1) the California Childhood Leukemia Study (CCLS), and 2) the Mexican Interinstitutional Group for the Identification of the Causes of Childhood Leukemia (MIGICCL). This study will provide genome-wide SNP array data from Hispanic/Latino children, contributing to studies of the genetic etiology of childhood ALL and cancer health disparities. It will also provide data from childhood ALL cases and controls from a Hispanic/Latino population outside of the United States (i.e., Mexico). Genetic data were generated by the Center for Inherited Disease Research. Samples were genotyped using the Illumina Global Diversity Array GDA-8v1-0. Individual level genotype data will be available through dbGaP. Note that for a small number of genotyped cases in the MIGICCL study, it was later found that these were not ALL cases but were either acute myeloid leukemia (AML) or non-acute leukemia. Additional available data include demographic and birth-related variables, and patient-related data including age-at-diagnosis and leukemia immunophenotype and molecular subtypes.

  Study phs003953

• Targeted Long-Read Sequencing Enables Comprehensive Analysis of the Genetic and Epigenetic Landscape of Inherited Myopathies

  This study investigated the utility of targeted Oxford Nanopore Technologies (ONT) long-read sequencing (LRS) for the diagnosis of inherited myopathies. A targeted ONT LRS assay was applied to a cohort of myopathy participants with and without previous genetic diagnoses. Our results demonstrate that this assay provides comprehensive genetic and epigenetic characterisation of inherited myopathies. At the time of dbGaP submission, disease causing variants had been identified a number of genes (DUX4, GIPC1, DGUOK, NOTCH2NLC, RILPL1, ABCD3, LAMA2 and CAPN3) in a group of previously undiagnosed genetic myopathy participants. The ONT LRS assay also identified known pathogenic variants in a number of genes (CAPN3, CACNA1S, RYR1, MT-TL1, CNBP, DMD, DUX4, SMCHD1) in a group of positive control participants with previously known genetic diagnoses.

  Study phs004623

• Acute Respiratory Distress Network (ARDSNet) Study 02 Late Steroid Rescue Study (LaSRS) (ARDSNet-LaSRS-BioLINCC)

  Data Access NOTE: Please refer to the “Authorized Access” section below for information about how access to the data from this accession differs from many other dbGaP accessions. Biospecimens: Access to Biospecimens is through the NHLBI Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC). Biospecimens from ARDSNet-LaSRS include BAL Slides, Bronchial Lavage, and Plasma. Please note that use of biospecimens in genetic research is subject to a tiered consent.Objectives: Since previous reports suggested that corticosteroids may improve survival, this project was developed as a multicenter, randomized controlled trial of corticosteroids in patients with persistent ARDS.Background: Persistent acute respiratory distress syndrome (ARDS) is characterized by excessive fibroproliferation, ongoing inflammation, prolonged mechanical ventilation, and a substantial risk of death.Participants: There were 180 participants.Conclusions: The results do not support the routine use of methylprednisolone for persistent ARDS despite the improvement in cardiopulmonary physiology. In addition, starting methylprednisolone therapy more than two weeks after the onset of ARDS may increase the risk of death. (NEJM April 20, 2006; Vol 354, No. 16, pp 1671-84).

  Study phs003769

• Honolulu Heart Program (HHP-BioLINCC)

  Data Access NOTE: Please refer to the “Authorized Access” section below for information about how access to the data from this accession differs from many other dbGaP accessions. Access to Biospecimens is through the NHLBI Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC). Biospecimens from HHP include DNA, plasma, serum, and whole blood. Please note that use of biospecimens in genetic research is subject to a tiered consent. Objectives: The initial objectives of the Honolulu Heart Program were to: 1) estimate morbidity and mortality from coronary heart disease and stroke among Japanese men in Honolulu; 2) compare morbidity and mortality from coronary heart disease and stroke among Japanese men in Japan, Honolulu, and San Francisco; 3) investigate relationships among risk factors, coronary heart disease, and stroke in Japanese men in Honolulu; 4) compare distributions of risk factors among men in Japan, Honolulu, and San Francisco, and relate similarities and differences in risk factors to the occurrence of disease in these areas and in other populations, including Framingham and Puerto Rico; 5) conduct an autopsy study, and to relate pathological findings to morbidity and mortality data; and 6) investigate relationships between risk factors and pathological evidence of atherosclerosis and its complications.Background: The Honolulu Heart Program was initiated in 1965 by the NHLBI as a prospective study of environmental and biological causes of cardiovascular disease among Japanese Americans living in Hawaii. This population was known to have low incidence of coronary heart disease and higher incidence of stroke. The study provided opportunities to investigate relationships among disease frequencies, pathologic findings, and disease predictors in the cohort and to compare the findings in this population with those in other populations, especially cohorts of Japanese men resident in Japan or the U.S.Participants: There were 8006 participants.Design: The study began in 1965 with the first examination of a cohort of 8,006 Japanese-American men residing on the island of Oahu, Hawaii who were born during the period 1900-1919. The first examination was completed in 1968 and was followed by the initiation of a second examination that same year. Three subsequent sub-examinations (Lipoprotein Exams I, II and III) were conducted between 1970 and 1982 to collect lipid measurements on a subset of those who participated in Exam II. The fourth examination of surviving members of the original cohort was conducted during 1991-93 and collected data on 3,741 men. Morbidity and mortality follow-up continues through grant and contract-supported efforts, and the current HHP dataset includes events through 1998.

  Study phs003907

• Framingham Heart Study-Cohort (FHS-Cohort) - BioLINCC

  Data Access NOTE Please refer to the "Authorized Access" section below for information about how access to the data from this accession differs from many other dbGaP accessions. Related Studies Other Framingham data available include: Imaging studies (Framingham Heart Study-Cohort (FHS-Cohort)-Imaging, phs003593), Genetics and genomics (Framingham Cohort, phs000007), Collaborative Cohort of Cohorts for COVID-19 Research (C4R): (Framingham Heart Study, phs002911), and as a component of the Sleep Heart Health Study (SHHS-BioLINCC, phs003637). Available Data Original cohort: data now include examination data from the first 32 clinical exams, selected ancillary data, and event follow-up through 2018. Offspring/Omni1 cohort: Data available include Framingham Offspring examination data from the first 9 clinical exams and selected ancillary data and event follow-up through 2019. Also included are the first 4 exams from the OMNI 1 cohort. Third Generation/Omni2/New Offspring Cohort: Data available include Framingham Generation 3 examination data from the first 3 clinical exams, selected ancillary data and event follow-up through 2019. Also included are the OMNI 2 and New Offspring (NOS) cohorts. A genetic pedigree is not provided for the Framingham phenotype only data. Objectives The objectives of the Framingham Study are to study the incidence and prevalence of cardiovascular disease (CVD) and its risk factors, trends in CVD incidence and its risk factors over time, and familial patterns of CVD and risk factors. Other important objectives include the estimation of incidence rates of disease and description of the natural history of cardiovascular disease, including the sequence of clinical signs and systems that precede the clinically recognizable syndrome and the consequences and course of clinically manifest disease. Background Original cohort: The original cohort of the Framingham Study began in 1948 under the U.S. Public Health Service and was transferred under the direct operations of the new National Heart Institute, NIH, in 1949. Participants were sampled from Framingham, Massachusetts, including both men and women. This was the first prospective study of cardiovascular disease and identified the concept of risk factors and their joint effects. Offspring/Omni1 cohort: With the aging of the Framingham cohort and with interest in familiar aggregation and heritability, a new cohort consisting of the offspring of the original cohort was sampled. Spouses of offspring were also included. This new sample, began enrollment in 1971 and constituted a second generation of participants, permitting new assessment of risk factors and outcomes, and provided a resource for the genetic analyses which were yet to come. The Offspring participants have had repeated examinations, though at typically longer intervals than the original cohort. Third Generation/Omni2/New Offspring Cohort: Thirty-one years after enrollment began for the second generation of the Framingham Heart Study (Framingham Offspring Study), Framingham investigators began enrolling adults with at least one parent enrolled in the Offspring study into the Framingham Generation 3 cohort. The addition of the third generation was expected to facilitate investigation of secular trends in risk factors and indicators of health and disease within families, to enhance statistical power to detect genetic and environmental determinants of complex diseases, and to clarify how subclinical cardiovascular disease predicts occurrence of overt clinical events. Participants Original cohort: At entry to the study in 1948-1952, the study recruited 5,209 men and women, ages 28-62 years, living in Framingham, MA. Offspring/Omni1 cohort: 5,124 men and women, ages 5-70 years at entry consisting of offspring of the original Framingham cohort (and spouses of the offspring). In 1994, the Omni Cohort 1 enrolled 507 men and women of African-American, Hispanic, Asian, Indian, Pacific Islander and Native American origins, who at the time of enrollment were residents of Framingham and the surrounding towns. Third Generation/Omni2/New Offspring Cohort: 4095 men and women, almost all who self reported their ethnicity as white, ages 19+ years at entry, with at least one parent in the Framingham Offspring study, participated in the Gen III cohort. The New Offspring Cohort enrolled spouses of Offspring participants that were not otherwise enrolled and had at least two biological children participating in Gen III. 103 New Offspring Spouses (47 men and 56 women) participated. The OMNI 2 cohort enrolled additional ethnically diverse participants, including many individuals related to the participants of Omni Cohort 1 and also individuals unrelated to Omni Cohort 1 members for a total of 410 new participants. Design The cardiovascular disease conditions under investigation include coronary heart disease (angina pectoris, myocardial infarction, coronary insufficiency and sudden and non-sudden death), stroke, hypertension, peripheral arterial disease and congestive heart failure. Original cohort: The Framingham Study is a longitudinal investigation of constitutional and environmental factors influencing the development of CVD in men and women. Examination of participants has taken place every two years and the cohort has been followed for morbidity and mortality over that time period. Offspring/Omni1 cohort: By 1975, a sample of 5,124 men and women, consisting of offspring of the original Framingham cohort (and spouses of the offspring) had participated in the study. Additional studies of these subjects have continued under research contracts. Third Generation/Omni2/New Offspring Cohort: The children of Offspring Cohort participants were initially identified who would be 20 years of age or older by the end of the enrollment period. A higher priority for recruitment was assigned to individuals who belonged to large extended families, in order to complement phenotypic and genotypic information already obtained from prior generations. The baseline examination was begun in 2002 and completed in 2005.

  Study phs003594

• Genomic Landscape of Colorectal Cancer in a Multi-Ancestry Cohort

  Elucidating the tumor mutational landscape of colorectal cancer (CRC) in admixed and ancestrally diverse populations is essential to enable precision medicine advancements that benefit individuals of all backgrounds. This study draws from the Latino Colorectal Cancer Consortium (LC3) and other prior initiatives to characterize and examine the somatic mutational patterns of colorectal tumors in Hispanic/Latino/Latina patients (henceforth referred to as Latino) as compared to other racial and ethnic populations. It includes paired tumor-normal whole-exome sequencing from 718 patients with primary CRC (128 Latino and 469 non-Latino individuals) to investigate the associations between somatic mutational features and both self-reported ethnicity and genetic ancestry. Somatic mutations and inherited variants were called, and global genetic ancestry proportions (African, Asian, European, Native American) were estimated from inherited variants using ADMIXTURE based on reference samples from the 1000 Genomes Project (1KGP) and the Population Architecture using Genomics and Epidemiology (PAGE) Study. Associations between genetic ancestry and gene-level mutational status, microsatellite instability status, and tumor mutational burden were estimated using logistic regression, after adjusting for age at diagnosis, sex, tumor location, and stage.

  Study phs003464

• dbGaP Collection: NIH Autism -omics Studies

  Autism Spectrum Disorders (ASD) are early onset neurodevelopmental syndromes characterized by impairments in reciprocal social interaction and communication, accompanied by restricted and repetitive behaviors. ASDs afflict ~1% of the human population, and represent a major public health burden. Evidence for the etiology of ASD has consistently pointed to a strong genetic component, though the genetic architecture is indisputably complex. This dbGaP Collection consists of studies that include GWAS, sequencing (targeted, exome, whole genome), transcriptomics, etc, across many different cohorts. Many of the datasets have been curated and harmonized with NDAR prior to submission to dbGaP. Researchers who request and are approved to access this collection will be granted access to all related substudies in dbGaP as well as all NDAR data. Individual level genomics data will only be available for download through dbGaP along with minimal phenotype and pedigree information. Detailed phenotype and available imaging data related to these same research subjects are available for query and download within NDAR. The NDAR GUID will allow individual genomic data to be associated with all NDAR data collected for those subjects.

  Study phs000764

• Genetic Modifiers of Duchenne Muscular Dystrophy

  The primary determinant of disease severity in patients with severe Duchenne muscular dystrophy (DMD) or milder Becker muscular dystrophy (BMD) is whether their dystrophin gene (DMD) mutation disrupts the mRNA reading frame or permits the expression of a partially functional protein. However, even in the complete absence of dystrophin, variability in disease severity is observed, with candidate gene studies implicating several genes as potential DMD modifiers. This study undertakes a comprehensive genome-wide search for modifier loci influencing disease severity in DMD patients. The availability of subjects for such studies remains limited, resulting in modest sample sizes that challenge the GWAS design. To address this, we have implemented measures to minimize heterogeneity within the dataset at the dystrophin (DMD) gene itself, adopting a conservative approach to DMD mutation classification to limit the possibility of residual dystrophin expression. Additionally, the study employed statistical methods that are well-suited to smaller sample sizes, including the use of a novel linear regression-like residual for time to ambulatory loss and the application of evidential statistics, specifically the Posterior Probability of Linkage Disequilibrium (PPLD), to assess trait-SNP associations in the GWAS framework. With a sample size of 419 patients, this study has identified multiple candidate genetic modifier loci. The molecular data available in dbGaP includes 2,562,265 directly genotyped variants in 419 people using the Illumina Infinium Omni2.5Exome-8 Beadchip assay, achieving a genotyping rate of 0.998. The phenotypic data comprises age at ambulatory loss, steroid status, DMD gene mutation, and the PPLD value from the time-to-event (TE) phenotype.

  Study phs003680

• NCTN: A Phase 1/2 Study of CPX-351 (NSC# 775341) Alone followed by Fludarabine, Cytarabine, and G-CSF (FLAG) for Children with Relapsed Acute Myeloid Leukemia (AML) (AAML1421)

  Study ID: AAML1421NCT Number: NCT02642965 Children's Oncology Group (COG)Submitted in collaboration with the NCTN/NCORP Data ArchiveTrial Title: NCTN: A Phase 1/2 Study of CPX-351 (NSC# 775341) Alone followed by Fludarabine, Cytarabine, and G-CSF (FLAG) for Children with Relapsed Acute Myeloid Leukemia (AML) (AAML1421)Trial Description: This phase I/II trial studies the side effects and best dose of liposome-encapsulated daunorubicin-cytarabine when given with fludarabine phosphate, cytarabine, and filgrastim and to see how well they work in treating younger patients with acute myeloid leukemia that has come back after treatment (relapsed) or is not responding to treatment (is refractory). Liposome-encapsulated daunorubicin-cytarabine is made up of two chemotherapy drugs, cytarabine and daunorubicin hydrochloride, and works to stop cancer cell growth by blocking the cells from dividing. Drugs used in chemotherapy, such as fludarabine phosphate and cytarabine, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Filgrastim may increase the production of blood cells and may help the immune system recover from the side effects of chemotherapy. Giving liposome-encapsulated daunorubicin-cytarabine followed by fludarabine phosphate, cytarabine, and filgrastim may be a better treatment for patients with relapsed acute myeloid leukemia and may cause fewer side effects to the heart, a common effect of other chemotherapy treatments for acute myeloid leukemia. Clinical data presented in the following publication(s): PMID 32401633 Disease type(s): Hematopoietic Neoplasm/Leukemia - Acute Myeloid LeukemiaClinical Dataset(s) included: NCT02642965-D1 (PMID 32401633): There is 1 dataset for AAML1421's primary publication, PMID 32401633. The NCT02642965-D1 dataset is a patient level dataset (single row per patient) containing patient characteristics, cytogenetic categories, tumor response, survival, neutrophil count recovery, toxicity, residual disease status, and pharmacokinetic data for eligible pediatric acute myeloid leukemia (AML) patients enrolled on the AAML1421 clinical trial.You are encouraged to view the PDF data dictionaries found in the "Documents" tab of the dbGaP study page, which may contain additional information regarding the data or the associated publication(s).

  Study phs004160

• Risk Factors for Asymptomatic Diverticulosis

  Data for this analysis came from a prospective study of colonic diverticulosis at the University of North Carolina Hospital in Chapel Hill, North Carolina (NIH R01DK094738). This is a case-control genetic and transcriptomic study to identify the genetic and cellular determinants underlying colonic diverticulosis and the relationship with other gastrointestinal disorders. The study inclusion and exclusion are described below. DNA and RNA sequencing were performed on colonic tissue from 404 patients with (N=172) and without (N=232) diverticulosis. We assessed variation in the transcriptome associated with diverticulosis and integrated this variation with human intestine single-cell RNA-seq data. We integrated our expression quantitative trait loci with GWAS using Mendelian Randomization. A polygenic risk score analysis examined associations between severity of diverticulosis and other gastrointestinal disorders. We identified 38 genes with differential expression and 17 genes with varied transcript usage linked to diverticulosis. Our results suggest tissue remodeling as a primary mechanism for diverticula formation. The presence of diverticulosis was linked to stromal and epithelial cells in the colon including endothelial cells, myofibroblasts, fibroblasts, goblet, tuft, enterocytes, neurons, and glia. MR highlighted five genes including CCN3, CRISPLD2, ENTPD7, PHGR1, and TNFSF13. In diverticulosis cases, ENTPD7 upregulation was confirmed. A greater burden of diverticula was positively correlated with genetic predisposition to diverticulitis. The data related to the study including total RNA-Seq, SNP array and imputed genotypes will be available through dbGaP.

  Study phs003556

• Establishment of an iPSC Repository Derived from Healthy Volunteers

  Understanding the interaction between genetic variation and epigenetic variation remains a challenge due to the confounding role of environmental factors. We propose that human induced pluripotent stem cells (iPSCs) are an excellent model to study the relationship between genetic variation and epigenetic variation while controlling for consistent environmental factors. In this study, we have created a comprehensive resource of high-quality genomic, epigenomic, and transcriptomic data of six iPSC lines and three iPS-derived cell types (NSC, Motor Neuron, Monocyte) from three healthy donors. We found that epigenetic variation is most strongly associated with genetic variation at the iPSC stage, and that relationship weakens as epigenetic variation increases in the differentiated cells. Additionally, cell-type is a stronger source of epigenetic variation than genetic variation, highlighting that humans are far more similar than they are different, regardless of genetic background. Further, we have elucidated a utility of studying epigenetic variation in iPSCs and their derivatives for identifying important loci for GWAS studies and the cell-types in which they may be acting.

  Study phs003649

• Prevention and Early Treatment of Acute Lung Injury Network - Reevaluation of Systemic Early Neuromuscular Blockade (PETAL ROSE-BioLINCC)

  Data Access NOTE: Please refer to the "Authorized Access" section below regarding accessing data through the BioData Catalyst ecosystem. The data from this accession is not available for download through dbGaP. Data Update: The data available for request now include additional Long Term Outcome data and ancillary data on DNA complexes..Biospecimens: Access to Biospecimens is through the NHLBI Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC). Biospecimens from PETAL ROSE include Plasma, DNA, Whole Blood, and Urine. Please note that use of biospecimens in genetic research is subject to a tiered consent.Objectives: To determine the efficacy and safety of early neuromuscular blockade with concomitant heavy sedation as compared with a strategy of usual care with lighter sedation targets in patients with moderate-to-severe ARDS.Background: It has been well established that the approaches used for the application of mechanical ventilation in patients with acute respiratory distress syndrome (ARDS) can affect survival and outcomes after discharge from the intensive care unit (ICU). A large, multicenter trial conducted a decade before this study reported that the early administration of a 48-hour infusion of neuromuscular blockade in patients with moderate-to-severe ARDS (defined by a ratio of the partial pressure of arterial oxygen [Pao2] to the fraction of inspired oxygen [Fio2] of Participants: There were 1006 participants.Design: PETAL-ROSE was a multicenter, unblinded, randomized trial of patients with moderate-to-severe ARDS. Participants were randomly assigned in a 1:1 ratio to receive 48 hours of continuous neuromuscular blockade with concomitant deep sedation (intervention group) or to receive usual care without routine neuromuscular blockade and with lighter sedation targets (control group).Patients in the intervention group who were not under deep sedation at baseline were deeply sedated within 4 hours after randomization. Subsequently, patients in this group received an intravenous bolus of 15 mg of cisatracurium, followed by a continuous infusion of 37.5 mg per hour for 48 hours. After the 48-hour trial intervention period, decisions regarding further use of neuromuscular blockade, including the choice of agent, were left to the discretion of the treating clinician. Neuromuscular blockade could be stopped early if the patient met the criteria for freedom from mechanical ventilation (Fio2 ≤0.40 and PEEP ≤8 cm of water) for at least 12 hours. All patients were treated with a strategy of low tidal volume ventilation within 2 hours after randomization and a high PEEP strategy for up to 5 days after randomization. Assessors who were unaware of the group assignment interviewed surviving patients or their proxies at 3, 6, and 12 months after randomization. The primary end point was in-hospital death from any cause at 90 days (in-hospital was defined as the time in the trial hospital plus transfer to another hospital, including the time in long-term acute care facilities). Conclusions: After the second interim analysis, the decision to stop the trial for futility was made independently by the data and safety monitoring board.In critically ill patients identified shortly after the diagnosis of moderate-to-severe ARDS, the addition of early continuous neuromuscular blockade with concomitant deep sedation did not result in lower mortality than a usual-care approach to mechanical ventilation that included lighter sedation targets.

  Study phs003878

• ​​Rare Genetic Variants and Severe COVID-19 in Previously Healthy Admixed Latin American Adults​

  This study investigates the contribution of rare genetic variants to the progression of severe COVID-19 in young and middle-aged adults without pre-existing health conditions. The cohort included 161 Brazilian patients aged 18 to 60 years who were hospitalized in intensive care units due to life-threatening SARS-CoV-2 infection. Whole-genome sequencing (WGS) was performed to detect rare variants, followed by a targeted prioritization of loci previously linked to severe COVID-19 outcomes. The analysis identified 104 rare and potentially deleterious variants across 79 genes, with ultra-rare alterations most frequently observed in MUC5AC, IFNA10, ZNF778, and PTOV1. Seventeen novel variants were discovered, several predicted to be pathogenic or indicating strong intolerance to loss-of-function (LoF) mutations. Clinically, carriers of prioritized rare variants showed an increased incidence of acute respiratory distress syndrome (ARDS) (p = 0.027, OR = 2.59), and those with variants in highly LoF-intolerant genes had a fourfold higher mortality risk (p = 0.0084, OR = 4.04).This represents the first comprehensive genomic analysis of severe COVID-19 in a previously healthy Latin American population, emphasizing the relevance of identifying population-specific rare variants associated with disease severity.

  Study phs004369

• Identification of a Type 1 Diabetes-Associated T Cell Receptor Repertoire Signature from the Human Peripheral Blood

  Type 1 Diabetes (T1D) is a T-cell mediated disease with a strong immunogenetic HLA dependence. HLA allelic influence on the T cell receptor (TCR) repertoire shapes thymic selection and controls activation of diabetogenic clones, yet remains largely unresolved in T1D. We sequenced the circulating TCRβ chain repertoire from 2250 HLA-typed participants across three cross-sectional cohorts, including T1D individuals, and healthy related and unrelated controls. We found that HLA risk alleles show higher restriction of TCR repertoires in T1D individuals. We leveraged deep learning to identify T1D-associated TCR subsequence motifs that were also observed in independent TCR cohorts residing in pancreas-draining lymph nodes of T1D individuals. Collectively, our data demonstrate T1D-related TCR motif enrichment based on genetic risk, offering a potential metric for autoreactivity and groundwork for TCR-based diagnostics and therapeutics.

  Study phs003979

• Atherosclerosis Risk in Communities Study (ARIC-BioLINCC)

  Data Access NOTE:Please refer to the “Authorized Access” section below for information about how access to the data from this accession differs from many other dbGaP accessions. At present, the ARIC sIRB has determined that ARIC data cannot be shared with for-profit entities.Related Studies Other ARIC data available include: Imaging studies (ARIC-Imaging), Genetics and genomics (ARIC, phs000280.v8.p2), Collaborative Cohort of Cohorts for COVID-19 Research (C4R): ARIC (phs002988.v1.p1), and as a component of the Sleep Heart Health Study (SHHS-BioLINCC, phs003637.v1.p1). Available Data Data available for request include ARIC v1-v8 examination cycles, collated annual follow-up communication data for contact years 2-32, and follow-up for mortality, heart disease, and stroke events through 2019. Also included are data from ancillary studies. Objectives The objectives of ARIC are to: 1) investigate associations of factors, including those not previously measured in cohort studies, with prevalence of atherosclerosis and incidence of CHD, clinical stroke and other cardiovascular diseases; and 2) measure cardiovascular disease occurrence and trends and relate these to community levels of, and changes in, risk factors, medical care and atherosclerosis. Background At the time of project initiation, the NHLBI had long recognized the need for longitudinal studies to identify the biochemical and physiological markers and specific environmental factors which place individuals at high risk for the major atherosclerosis diseases. The development of reliable ultrasound examination of peripheral arteries enhanced the expected benefit of such studies. Community surveillance planning began for ARIC in response to recommendations of the 1978 NHLBI Workshop on the Decline in CHD Mortality and has been extended in its purpose to evaluate the large geographic differences in U.S. mortality. Participants Black and white men and women, age 45-64 at entry; sample size: 15,792. Design ARIC is a large-scale, long-term prospective study that measures associations of established and suspected coronary heart disease risk factors with both atherosclerosis and new CHD events in men and women from four geographically diverse communities. The project has two components: community surveillance of morbidity and mortality; and repeated examinations of a representative cohort of men and women in each community. The community surveillance involves abstracting hospital records and death certificates and investigating out-of-hospital deaths. The representative cohorts include approximately 4,000 persons from each community. Community surveillance data includes detailed hospital record abstraction, ECG tracings, and event adjudication. Data from out-of-hospital events in the community include physician, informant, and coroner questionnaires as well as death certificate data and event adjudication. Community surveillance ended in 2014.Cohort participants were examined four times at three year intervals between 1987 and 1998, and have been continuously contacted annually to update their medical histories. Atherosclerosis was measured by carotid ultrasonography. Risk factors studied include: blood lipids, lipoprotein cholesterols, and apolipoproteins; plasma hemostatic factors; blood chemistries and hematology; sitting, supine and standing blood pressures; anthropometry; fasting blood glucose and insulin levels; ECG findings; cigarette and alcohol use; physical activity levels; dietary aspects; and family history. Clinic visits were restarted in 2011 with ARIC visit 5.

  Study phs003738

• Rare and Atypical Diabetes Network (RADIANT)

  The Rare and Atypical DIAbetes NeTwork (RADIANT) is a multicenter prospective cohort study that is dedicated to characterizing (discovering and defining) rare and atypical forms of diabetes. Individuals will be screened for evaluation of suspected atypical diabetes of unknown origin. Among the pool of evaluated individuals, those found to have a known form of diabetes will be excluded from further study. The remaining participants will be prioritized for genetic/genomic analysis and further testing. Primary Objectives: • Identify and enroll individuals and families with undiagnosed rare and atypical forms of diabetes. • Determine the etiologic basis of the metabolic disorder among individuals and families with novel forms of rare and atypical diabetes. • Understand the pathophysiology of individuals and families with novel forms of rare and atypical forms of diabetes. RADIANT has three distinct stages. Stage 1: Participants complete a consent form and a questionnaire to determine the potential for having atypical forms of diabetes. Participants identified as potentially having atypical forms of diabetes based on questionnaire responses are asked to provide a blood sample to test for islet autoantibodies and complete additional questionnaires. The RADIANT Adjudication Committee, which is comprised of a team of experts in diabetes, assesses the data collected in Stage 1, then selects and prioritizes participants to proceed to Stage 2 and 3 for Whole Genome Sequencing (WGS) and other testing. Stage 2: Genetic screening of participants for known forms of monogenic diabetes. Participants will consent for this stage of the study, complete a family history questionnaire, and have blood collected for DNA and RNA extraction, storage, and analysis. Whole genome sequencing (WGS) is performed on all DNA samples. If WGS does not identify a pathogenic/likely pathogenic variant in a known monogenic diabetes gene that is thought to explain the participant's diabetes, RNA Sequencing is performed at Baylor College of Medicine. Stage 3: Deeper phenotyping of all participants who proceed to Stage 3. Participants visit a study clinic to consent and complete Stage 3 procedures which include: an Oral Glucose Tolerance Test (OGTT), additional blood collection, a detailed physical exam, and additional questionnaires. The work of the Discovery Team is expected to be an iterative process analyzing all data collected up to this point in the study to understand the significance of novel variants. In some instances, the Discovery Team may determine that enrollment of the Proband's family members is necessary. Family members with suspected atypical diabetes will follow the same study procedures as described above. Affected and unaffected family members may also be enrolled for Sanger Sequencing or trio WGS. The Discovery Team may also recommend additional optional procedures to better characterize the participant's form of diabetes.Clinical and deeper phenotyping data can be requested from the NIDDK Central Repository (https://doi.org/10.58020/1wxp-dw53).

  Study phs004543

• Genomic Sequencing of Ewing Sarcoma

  Pediatric Ewing sarcoma is a pediatric cancer that primarily arises from the bone. It is characterized by chimeric fusions of the EWS gene and an ETS family transcription factor. In this study, we performed massively parallel sequencing of a larger collection of Ewing sarcoma tumors to define the genomic landscape of this disease. We found that these tumors are among of the most genetically normal cancers currently characterized. There was also a marked absence of recurrent mutations in immediately targetable signaling transduction pathway genes. In this study we answer outstanding questions about ETS transcription factor expression, effects of treatment on mutational burden in Ewing sarcoma tumors, and describe patterns of tumor evolution. We also found that loss-of-function mutations in STAG2 were present in approximately 15% of Ewing sarcoma tumors and loss of STAG2 expression was associated with disease metastasis in this patient cohort.

  Study phs000804

• A Depression and Opioid Pragmatic Trial in Pharmacogenetics (ADOPT PGx): Depression Trial

  This study was comprised of three separate pharmacogenetic trials grouped into a single protocol due to similarities in the intervention, the hypotheses, and the trial design. The three trials are the Acute Pain Trial, the Chronic Pain Trial, and the Depression Trial (this study). Participants could enroll in only one of the three trials. Trial-specific outcomes will be compared between participants in the intervention arm and control arms who have an actionable phenotype.Depression: A prospective, multicenter, two arm randomized pragmatic trial. Participants meeting eligibility criteria were randomly assigned to either immediate pharmacogenetic testing and genotype-guided anti-depressant therapy (Intervention arm) or standard care with 6-month delayed pharmacogenetic testing (Control arm). Actionable phenotypes are defined as CYP2C19 ultra-rapid metabolizers (UMs), rapid metabolizers (RMs) and poor metabolizers (PMs) or CYP2D6 ultra-rapid metabolizers (UMs) and poor metabolizers (PMs) for the depression trial. This study includes approximately 1470 participants seen in primary care or psychiatry clinics who are already prescribed or anticipate to be prescribed an SSRI with existing CPIC guidelines.

  Study phs004069

• The Genetics of Food Cue Reactivity in Children

  This study aimed to investigate genetic factors related to appetite, eating in the absence of hunger and brain reward response to food cues in a convenience sample of pre-adolescent children taken through two studies (A and B). The study involved genome-wide genotyping using the Illumina Global Screening Array. The study found an obesity polygenic risk score related to parent-reported appetitive traits in children, The study also found that FTO was related to eating in the absence of hunger and brain reward response to food cues. Available data include genotypes, measured height and weight, appetitive traits, consumption, brain reward response to food cues, and sociodemographic variables.

  Study phs003550

• Acute Respiratory Distress Network Early Versus Delayed Enteral Feeding to Treat People with Acute Lung Injury or Acute Respiratory Distress Syndrome (ARDSNet EDEN-BioLINCC)

  Data Access NOTE: Please refer to the “Authorized Access” section below for information about how access to the data from this accession differs from many other dbGaP accessions. Biospecimens: Access to Biospecimens is through the NHLBI Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC). Biospecimens from ARDSNet-EDEN include bronchial lavage, plasma, DNA, and urine. Please note that use of biospecimens in genetic and non-genetic research is subject to a tiered consent. Objectives: To determine if initial lower-volume trophic enteral feeding would increase ventilator-free days (VFDs) and decrease gastrointestinal intolerances compared with initial full enteral feeding. Background: Mechanically ventilated patients cannot eat normally and if not fed for long periods become malnourished. Because malnutrition is associated with poor outcomes in critically ill patients, artificial nutrition is often provided, especially in those with acute lung injury (ALI) and with expected longer duration of mechanical ventilation. When feasible, enteral nutrition targeting full caloric needs has been advocated over parenteral nutrition. However, feeding intolerance and common care practices often serve as practical barriers to reaching recommended goals. Although confounded by indication and severity of illness, several observational studies have shown improved clinical outcomes, including fewer infections, shorter duration of mechanical ventilation, and lower mortality for patients receiving a higher percentage of calculated caloric needs. Nonetheless, the best timing, formulation, and amount of enteral nutrition remain unknown. Participants: A total of 1,000 participants were enrolled. Design: Participants were randomized, stratified by site and presence of shock at enrollment, to receive either trophic or full enteral feeding for the first 6 days of mechanical ventilation. The initial 272 patients were also simultaneously randomized to a separate trial (the OMEGA study) comparing a nutritional supplement containing omega-3 fatty acids and antioxidants with an isocaloric, isovolemic control in a 2 × 2 factorial design.The designated feeding strategy was initiated within 6 hours of randomization and continued until death, extubation, or day 6. The care of mechanically ventilated patients still receiving enteral feedings after day 6 was managed according to the full feeding strategy in both groups. In extubated patients who then required reintubation, enteral nutrition was restarted and managed according to the study protocol.In the full-feeding group, enteral nutrition was initiated at 25 mL/h and advanced to goal rates as quickly as possible. Gastric residual volumes were checked every 6 hours while enteral feeding was increased. Patients randomized to the initial trophic-feeding group had enteral nutrition initiated at 10 mL/h (10-20 kcal/h) for the first 272 patients who also received the omega-3 or control supplement (240 mL volume per day). After the data and safety monitoring board stopped the OMEGA portion of the factorial design, the initial trophic feeding rate was changed to 20 kcal/h to approximate the calories that had been delivered in the OMEGA study. Gastric Residual Volumes (GRVs) were checked every 12 hours during trophic feeding. In patients randomized to trophic feeding, enteral nutrition was advanced to full-energy feeding rates following the same protocol used for the full-feeding group if they were still receiving mechanical ventilation at 144 hours. Conclusions: There was no difference between groups with regard to the primary end point, VFDs to day 28. There also were no differences in 60-day mortality, organ failure−free days, ICU-free days, or the incidence of infection between groups. Similarly, there were no differences between groups in VFDs or survival when analyzed by body mass index category or when subsets of patients with shock or more severe lung injury (acute respiratory distress syndrome) were examined.JAMA. 2012 Feb 22;307(8):795-803

  Study phs004168

• Hemochromatosis and Iron Overload Screening Study (HEIRS-BioLINCC)

  Data Access NOTE: Please refer to the "Authorized Access" section below for information about how access to the data from this accession differs from many other dbGaP accessions. Access to Biospecimens is through the NHLBI Biologic Specimen and Data Repository Information Coordinating Center (BioLINCC). Biospecimens from (HEIRS) include Buffy Coat, DNA, Dried Buffy Coat, Lymphocytes, Plasma, and Serum. Please note that use of biospecimens in genetic research is subject to a tiered consent. Objectives: The HEIRS Study evaluated the prevalence and genetic and environmental determinants and potential clinical, personal, and societal impact of iron overload and hereditary hemochromatosis in a multi-center, multiethnic, primary care-based sample of adults.Background: Hereditary iron overload, or hemochromatosis, is a common inherited disorder resulting from overabsorption of dietary iron. Excess iron is deposited in body tissues, and can accumulate to toxic levels over time causing damage in multiple organ systems. If untreated, these conditions may lead to death. Evidence suggests that early diagnosis and treatment can prevent disease manifestations and enable normal life expectancy. Thus, hemochromatosis may be suitable for detection and intervention through primary care screening strategies; however, much remains to be learned about the penetrance and expression of the known gene variants, HFE C282Y and H63D, associated with hemochromatosis. Iron overload and hereditary hemochromatosis have not been as extensively studied in racial/ethnic groups other than Caucasians.Participants: The initial screen phase included 102,000 adults recruited over a 2-year period from 5 North American Field Centers (approx. 51% white, 24% African American, 11% Asian, 11% Hispanic, and 3% unidentified race; 63% are female and 37% are male).Design: During the initial screen phase in 2001-2002, participants were recruited from primary care practices and blood-drawing laboratories. Blood specimens were tested for transferrin saturation (TS), serum ferritin (SF), and HFE C282Y and H63D genetic variants. Before genetic screening, participants were asked whether they had a history of medical conditions related to iron overload. Those participants with elevated iron levels and/or C282Y homozygosity, their family members, and frequency-matched control participants completed an examination that obtained data on personal and family medical history, lifestyle characteristics, genetic counseling and assessment of ethical, legal and social implications of screening, as well as clinical and biochemical measures. A separate randomized study examined the acceptability of genotypic or phenotypic (biochemical) screening for hemochromatosis.The majority of HEIRS participants have a consent limited to research on iron related disorders. Conclusions:Findings include: 1) transferrin saturation (TS) and serum ferritin (SF) mean levels differ across race/ethnic groups; 2) HFE C282Y variant does not account for these levels in non-Caucasians (Adams et al, NEJM 352:1769-78, 2005); and 3) there is similar participant acceptance for genotypic as for phenotypic testing (Anderson et al, 2005: PMID: 16247294).

  Study phs004477