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• The Genomics of Pilocytic Astrocytoma Formation in Neurofibromatosis Type 1

  Neurofibromatosis type 1 (NF1) inherited cancer predisposition syndrome is one of the most common autosomal dominant tumor predisposition syndromes in which affected individuals develop brain tumors. These low-grade glial neoplasms (pilocytic astrocytomas) typically arise in children younger than 7 years of age and are hypothesized to result from a combination of germline and acquired somatic NF1 tumor suppressor gene mutations. In this study, whole genome sequence analysis was performed on three NF1-associated pilocytic astrocytoma tumors (NF1-PA) and matched normal blood samples to establish the genomic landscape of NF1-PA. These data support the existence of multiple distinct mechanisms (mutation, LOH, and methylation) underlying somatic NF1 inactivation in NF1-PA tumors.

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• Children's Hospital of Philadelphia: GWAS of Left-Sided Cardiac Defects

  This is a family-based genome-wide association study of congenital left-sided cardiac lesions (LSLs). Cases with LSLs and their parents were recruited from the Cardiac Center at The Children's Hospital of Philadelphia between 1997 and 2010. The discovery dataset included 405 LSL case-parent triads. DNA was extracted from blood or saliva samples from these subjects and genotyping was conducted using the Illumina Infinium II HumanHap550K array (V3). This study was conducted with approval from the Institutional Review Board for the Protection of Human Subjects of The Children's Hospital of Philadelphia and all research subjects provided either written informed consent or, when appropriate, assent.

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• Single-Cell Profiling of Premature Neonate Airways Reveals a Continuum of Myeloid Differentiation

  We set out to develop a reference single-cell transcriptomic profile of airway aspirate samples from extremely premature neonates (collected within an hour of birth). In this study, we profiled samples from 10 subjects. We identified cells in the airways of premature neonates representing a continuum of myeloid differentiation, including fetal monocytes, differentiating myeloid cells, and macrophages. Trajectory analysis identified two trajectories consistent with interstitial and alveolar macrophages, and a bridging trajectory providing an alternative route between these terminal states. We defined 259 alveolar-specific genes, 666 interstitial-specific genes, and 285 bridging-specific genes providing the first single-cell transcriptional map of differentiating airway macrophages in humans.

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• Genomic Characterization of Pediatric Low-Grade Gliomas

  Pediatric low-grade gliomas (PLGGs) are the most common pediatric brain-tumor, with more than ten histologic subtypes recognized by the World Health Organization. We performed a genomic analysis of 230 PLGGs of which 73 had whole genome/RNA sequencing performed and show that MYB-QKI fusions define the seizure associated tumor, Angiocentric Glioma (AG). MYB-QKI fusions present in AGs contribute to tumorigenesis through three mechanisms: MYB activation by truncation, enhancer translocation driving aberrant MYB-QKI expression, and hemizygous loss of QKI, a tumor suppressor gene. Such interplay between three oncogenic mechanisms has diagnostic and therapeutic implications in AGs, and illustrates the functional complexity associated with rearrangements in cancer.

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• Genomic landscape of Neutrophilic Leukemias of Ambiguous Diagnosis

  Chronic neutrophilic leukemia (CNL), atypical chronic myeloid leukemia (aCML), and unclassified myelodysplastic syndrome/myeloproliferative neoplasms (MDS/MPN-U) are a group of rare, heterogeneous myeloid disorders. There is strong morphologic resemblance amongst these distinct diagnostic entities as well as lack of specific molecular markers and limited understanding of disease pathogenesis, which has made their diagnosis challenging. Treatment has remained empirical, resulting in dismal outcomes. We, therefore, performed whole exome and RNA-sequencing on a cohort of over 100 cases of these rare hematologic malignancies and present the most complete survey of the genomic landscape of these diseases to date. [Abstract from manuscript currently under review so copyright not yet determined]

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• Center for Common Disease Genomics (CCDG) - Cardiovascular: Harvard Gene-Diet Interaction in a Costa Rican Cohort

  The National Human Genome Research Institute (NHGRI) has funded the Centers for Common Disease Genomics (CCDG), a collaborative large-scale genome sequencing effort to comprehensively identify rare risk and protective variants contributing to multiple common disease phenotypes and to better understand the general principles of genomic architecture underlying common, complex inherited diseases. This study contains whole genome sequence data and associated variant calls of more than 4200 participants in a cohort collected by the Harvard School of Public Health. The cohort includes subjects from thirty-four countries in the Central Valley of Costa Rica covering a full range of socioeconomic levels, as well as urban, peri-urban and rural lifestyle

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• Genetic Analysis of Substance Use Disorder Using the Indiana Biobank Data

  The goal of this study is to identify genes related to substance use disorders. The study participants were selected from the Indiana Biobank. The Indiana Biobank provides centralized processing and storage of specimens that are linked to participants' electronic medical information. Cases were defined as having any type of substance use disorders by using ICD9/10 codes, including alcohol, cannabis, cocaine, opioid, nicotine, and other substances. Controls were defined as not having any type of substance use disorders. The Indiana Biobank is part of the Indiana Clinical and Translational Sciences Institute (CTSI), a state-wide research partnership among Indiana University, Purdue University, and the University of Notre Dame.

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• Grady Trauma Project (GTP)

  Not everyone exposed to traumatic experience develops Posttraumatic Stress Disorder (PTSD). Genetic background is one of the predisposing risk factors causing differential outcomes of trauma exposure. A primary goal of the Grady Trauma Project (GTP) is to pinpoint and understand genetic polymorphisms that contribute to development of PTSD. Both PTSD diagnosis binary labels and PTSD severity scores are studied as target phenotypes. Also, both candidate gene studies and genome-wide association studies are performed. Besides genetic variants, other measurements that are studied as risk factors for PTSD include lifetime history of trauma and peri-traumatic response. Study participants are primarily African American, trauma-exposed populations of low socioeconomic status recruited from Grady Memorial Hospital in Atlanta.

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• The Diabetes Heart Study (DHS)

  The Diabetes Heart Study is a family based study enriched for type 2 diabetes (T2D). The cohort included 1220 self-reported European Americans from 475 families (Bowden et al 2010 Review of Diabetic Studies 7:188-201: PMID: 21409311; Bowden et al 2008 Annals of Human Genetics 72:598-601 PMID: 18460048) and included siblings concordant for T2D; where possible unaffected siblings were also recruited. The cohort was recruited between 1998 and 2006. Participants were extensively phenotyped for measures of subclinical CVD and other known CVD risk factors. Primary outcomes were quantified burden of vascular calcified plaque in the coronary artery, carotid artery and abdominal aorta all determined from non-contrast computed tomography scans.

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• Genome-Wide Association Study of Lung Cancer Susceptibility in Never-Smoking Women in Asia

  To learn about the etiology of lung cancer among never-smoking women in Asia, we formed the Female Lung Cancer Consortium in Asia (FLCCA), which includes studies of lung cancer in Eastern Asia and conducted a GWAS. We analyzed a total of 5510 lung cancer cases and 4544 controls and identified 3 novel loci (Lan et al., 2012). Of these study subjects, 4922 lung cancer cases and 3959 controls are available for posting. Lan et al.., Genome-wide association analysis identifies new lung cancer susceptibility loci in never-smoking women in Asia. Nat Genet. 2012 Dec;44(12):1330-5. doi: 10.1038/ng.2456. Epub 2012 Nov 11. PubMed PMID: 23143601.

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