Program Director: Joshua C. Denny, MD, MS
The Vanderbilt Genomic Medicine (VGM) Training Program is now accepting applications for the 2018-2019 postdoctoral fellowship. VGM includes a major focus in pharmacogenomics, precision phenotyping, medical informatics, and disease-based genomics.
The program builds on decades-long strengths in critical enabling resources such as 1) BioVU, the largest biobank linking DNA samples to electronic medical records (EMRs) at a single academic institution (now >204,000 subjects), 2) Participation in three NHGRI-funded networks: the Electronic Medical Records and Genomics (eMERGE) network and eMERGE coordinating center, the Implementing Genomics in Practice (IGNITE) Network, and the Undiagnosed Diseases Network (UDN), 3) The Pharmacogenomic Resource for Enhanced Decisions In Care and Treatment (PREDICT) project that embeds genetic information in patient EMRs to guide drug and dosage choices (PREDICT served as one model for the ongoing eMERGE-PGx project that implements a similar preemptive genotyping paradigm across eMERGE), 4) the Program in Personalized Therapy for Cancer that applies tumor genome sequencing to identify actionable mutations in cancers and to personalized target therapy, 5) The HIV-Pharmacogenomics program, 6) the largest Department of Biomedical Informatics in the country, with strong research, education, and support programs in clinical information technology, and 7) participation and leadership in other related efforts at NIH, including the Genotype-Tissue Expression project (GTEx) and the Pharmacogenomics Research Network (PGRN).
The program has 32 highly collaborative and well-funded faculty preceptors who team up to provide both basic and clinical research training opportunities to both Ph.D.-level and M.D.-level postdoctoral fellows. Trainees will participate in rotations, internships, seminars, journal clubs, and retreats and interact with other trainees and faculty. Under Vanderbilt’s Biomedical Research Education and Training (BRET) Office, the program will provide RCR training, high-standard Individual Development Plans (IDP), and the Career Development programs.
Applicants must have been awarded a doctorate in biomedical sciences, medicine or a related field. Some prior experience in Computer Science, Statistics, Informatics, and/or Genetics is recommended, but not required.
Anyone interested in being considered must submit the following (in PDF format) to Janey Wang by 5 p.m. on Monday, April 2nd:
- 1-page personal research statement
- Letter of recommendation
- CV or biosketch
- Unofficial transcripts
Submissions should reference the program name in the subject line of the email.
If you have any questions about the VGM program, please contact Janey Wang, Project Manager, Center for Precision Medicine, Department of Biomedical Informatics.
Acknowledgement: The Vanderbilt Genomic Medicine Training Program is supported by an institutional training grant (T32 HG008341) from the National Human Genome Research Institute of the National Institute of Health.
Dan M. Roden, PhD
Professor of Medicine, Pharmacology and Biomedical Informatics
Director, Oates Institute for Experimental Therapeutics
Senior Vice President for Personalized Medicine
As more patients are sequenced to identify variants in Mendelian disease genes, there is a growing challenge of interpreting the detected variants. Increasingly, novel “variants of uncertain significance” are being identified, which have little or no published data on their pathogenicity. Variants in the voltage-gated cardiac sodium channel, SCN5A, can lead to Brugada Syndrome and Long QT Syndrome, potentially fatal arrhythmia conditions. The American College of Medical Genetics recommends that incidental pathogenic variants in SCN5A be reported so that patients and family members can be accurately diagnosed and treated. Unfortunately, our lab and others have found that the pathogenicity of SCN5A variants is often unknown or disputed and often does not accurately predict arrhythmias. Identification of a large set of SCN5A variants that have perturbed function in vitro may enable more accurate diagnosis and treatment of arrhythmia syndromes. My aim is to perform a high-throughput in vitro screen of SCN5A coding variants.
I have performed proof-of-principle experiments to demonstrate methods for the four steps of the screen: mutagenesis, transgenesis, functional assays, and high-throughput sequencing. During my time as a T32 fellow, I will apply these methods to survey the channel activity and membrane trafficking of most of the 1920 possible coding variants in an important 96 amino acid region of SCN5A. I will compare the in vitro dataset with known pathogenic variants in this region to determine if the in vitro data can help predict pathogenicity. This work is innovative because it leverages recently developed high-throughput sequencing based methods to broaden and improve our understanding of variants in an important cardiac disease gene. As genomic medicine continues to become more commonplace, the challenge of interpreting patients' variants will continue to grow. This project provides a template for a general approach for improving the breadth and quality of genomic annotations to help deliver on the promise of genomic and precision medicine.
Lab: 1285 Medical Research Building IV (Medicine-Division of Clinical Pharmacology)
Todd Edwards, PhD
Assistant Professor of Medicine, Division of Epidemiology
Associate Director, Vanderbilt Genetics Institute
Digna Velez Edwards, PhD
Associate Professor of Obstetrics and Gynecology
Associate Director, Vanderbilt Genetics Institute
My methodological research addresses the challenges of understanding the genomic architecture of complex human traits, while my applied research extends this to discover the genes and genomic mechanisms underlying traits in specific populations. An innovative aspect of my work is that genes associated with the physiological traits related to a disease may be involved in epistatic interactions with novel variants. This perspective has led to the development of a powerful and cost-effective methodology to detect genetic associations that otherwise would require much larger studies to observe marginal effects. The motivation for this work is the well-established missing heritability problem, and the intention to detect genetic determinants missed by univariate association scans. I have contributed to this area of research by modeling first-order interactions with genetic variants, or multiple variants summarized in a genetic risk score, that are associated with physiological traits closely-related to a disease, measured by high-quality, dynamic phenotypes in small cohorts, to detect associations with the trait of interest in larger case-control cohorts. This approach alleviates the high computational costs and multiple-testing burden that has hindered previous gene-gene interaction investigations.
I developed this methodology in response to the observation that genome-wide investigations of type 2 diabetes (T2D), a disease that affects hundreds of millions of individuals globally, has led to the discovery of variants that only explain 10-30% of disease heritability. Further, the majority of my work has been centered on cardiometabolic disease in African Americans, a classically understudied population that has a high burden of disease. The most recent data indicates that the prevalence of T2D among African Americans (13.2%) is much higher than that of European Americans (7.6%). The application of my methodological work is a powerful collaborative consortium project using resources from the ARIC, CARDIA, JHS, and MESA cohorts examining gene-gene interactions contributing to T2D risk in African Americans.
In addition to my work analyzing gene-gene interactions, I have also worked on other collaborative projects dealing with many types of data. I have led meta-analyses in the MEDIA project, an African American T2D genome-wide association study (GWAS) meta-analysis incorporating over 30,000 individuals from approximately 20 studies, alongside Dr. Maggie Ng from the Center for Diabetes Research at Wake Forest. This has led to the development of cutting-edge analytical approaches and highly effective quality control procedures, and has allowed for the inclusion of data from this project in the DIAMANTE consortium, a trans-ethnic T2D meta-analysis incorporating over 700,000 individuals from 5 different ethnicities.
Also, I have developed a technique that allows for simultaneous modeling of association, two point linkage, linkage conditioned on association, association conditioned on linkage, and joint linkage and association in family-based studies in an effort to identify high-impact, putatively causal variants. We are applying this approach to whole-exome microarray data from African American, Mexican American, and European American individuals from the IRASFS and DHS studies in an investigation of the genetic determinants of lipid metabolism traits. My research in various racial and ethnic groups, a challenging yet rewarding experience, has contributed to the understanding that only a portion of the genomic architecture of cardiometabolic traits are shared across ethnicities and has highlighted the need for further genetic investigations in multiple ancestries.
My future goals as a researcher are to obtain a position as a tenure-track faculty member at a major research center and conduct association studies in electronic medical record databases, such as the eMERGE network and BioVU at Vanderbilt, the Million Veteran’s Project, or the All of Us initiative. I would further like to pursue the development of statistical and computational methods for high-throughput omics (i.e. transcriptomics, metabolomics, etc.) data integration to identify targets for downstream molecular, cellular, and organismal-level functional investigations of candidate disease loci. Considering my research experience, my background in biochemistry and genetics, and my extensive training in computational methods, I believe I am a good candidate for this funding opportunity. I believe the Edwards lab at Vanderbilt is an ideal environment for the continuation of my research and training, as they are already involved in research activity in my target domains. I also feel that the Vanderbilt Genetics Institute is a dynamic and rapidly growing enterprise with access to outstanding resources and opportunities for trainees to develop into independent academic scientists.
Office: 2525 West End Ave, Suite 800 (Medicine-Division of Epidemiology)
Nancy J. Cox, PhD
Director, Vanderbilt Genetics Institute
Professor of Medicine, Division of Genetic Medicine
Director, Division of Genetic Medicine
Mary Phillips Edmonds Gray Professor of Genetics
As a trained cellular biologist and neuroscientist, I hope to expand my current knowledge of genetics and biological processes to better understand the relationships between genetic sequences and human disease. For the past 8 years, I have examined basic biological problems, first in cancer cells as a research technician, followed by my graduate work with neurons. I studied cancer progression and neuroplasticity at the cellular level, utilizing genetic and biochemical tools to dissect complex molecular pathways. Therefore, I feel that my expertise in investigating basic biological functions will allow me to approach genomic science with a unique perspective.
I joined David Miller’s lab as a graduate student in 2011, where I worked to uncover a genetic pathway that stabilizes synaptic connections in the nematode C. elegans. Using genetic tools, I found that a conserved sodium channel protein, UNC-8 (a degenerin/epithelial sodium channel protein) drives synapse removal in a calcium-dependent pathway. The phosphatase calcineurin also promotes synapse disassembly in this pathway, which is regulated by both transcriptional regulation and neuronal activity. This research aided in my training in several genetic and molecular techniques, including: live-imaging, immunofluorescence, image analysis, molecular biology, genetics, optogenetics, behavioral assays, CRISPR technology, biochemistry, and statistical analysis.
In addition to my scientific training, as a graduate student I developed strong written and oral communication skills through writing grant proposals, authoring manuscripts, and presenting my data at regional and international conferences. I mentored several undergraduate, graduate, and medical students in the lab and served as a teaching assistant in a graduate level course to strengthen my mentoring skills. Collaboration was also critical for my success as a graduate student. I organized monthly Skype meetings with two collaborating labs. These meetings were crucial to the publication of the eLife manuscript in which I am first author, and allowed me to hone my communication, organizational, and project management skills. These experiences helped me to develop transferable skills that will be essential for my success in all research settings.
As a postdoctoral fellow, I plan to build upon my bench skills by using computational and quantitative analysis of the genome to better understand human diseases. I am fascinated by the complexity of the genome and how sequence aberrations lead to disease. The Vanderbilt Genomic Medicine Postdoctoral Fellowship will provide an opportunity for me to utilize the modern tools that have been developed at Vanderbilt, including the BioVU genomic sequence bank and the PheWAS catalog. By combining the tools and training available in the VGM program and my strong background in molecular genetics and biology, I can develop a deeper understanding of the genome and how sequence changes result in phenotypic outcome. This information can then be applied to improve the diagnosis and treatment of human patients.
Office: 2215 Garland Ave. South, 519 Light Hall (Medicine-Division of Genetic Medicine)
Josh C. Denny, MD, MS
Director, Vanderbilt Center for Precision Medicine
Professor of Biomedical Informatics & Medicine
Jake Hughey, PhD
Instructor of Biomedical Informatics
Electronic medical records (EHRs) can provide tremendous value in both genomic research and clinical pharmacology to push the frontier of personalized medicine. Recent efforts at Vanderbilt include the development of phenome-wide association studies (PheWAS), which has uncovered new single nucleotide polymorphisms (SNP)-based associations with EHR-derived phenotypes, however SNPs may not always provide the best input variables to stratify patient populations. Additional predictor variables, including more ‘active’ data embedded in e.g. lab tests, narrative data, and self-reported outcomes, may serve as better predictors in a pharmacological setting, such as tracking longitudinal drug efficacy or side effects. Data which may reside outside of typical EHR settings, including social media, and biometric data such as ‘omics profiling, may also provide stronger associations with phenotypes than a more ‘static’ SNP array. Dr. Rhoades aims to develop new predictive tools, incorporating elements of machine learning and natural language processing, to increase the capacity of PheWAS analyses for clinical decision-making.
Office: 2525 West End Ave, Suite 1450 (Biomedical Informatics)