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Sayantan Das

Other affiliations: University of Cambridge
Bio: Sayantan Das is an academic researcher from University of Michigan. The author has contributed to research in topics: Genome-wide association study & Imputation (genetics). The author has an hindex of 19, co-authored 27 publications receiving 6155 citations. Previous affiliations of Sayantan Das include University of Cambridge.

Papers
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Journal ArticleDOI
TL;DR: Improvements to imputation machinery are described that reduce computational requirements by more than an order of magnitude with no loss of accuracy in comparison to standard imputation tools.
Abstract: Christian Fuchsberger, Goncalo Abecasis and colleagues describe a new web-based imputation service that enables rapid imputation of large numbers of samples and allows convenient access to large reference panels of sequenced individuals. Their state space reduction provides a computationally efficient solution for genotype imputation with no loss in imputation accuracy.

2,556 citations

Journal ArticleDOI
Shane A. McCarthy1, Sayantan Das2, Warren W. Kretzschmar3, Olivier Delaneau4, Andrew R. Wood5, Alexander Teumer6, Hyun Min Kang2, Christian Fuchsberger2, Petr Danecek1, Kevin Sharp3, Yang Luo1, C Sidore7, Alan Kwong2, Nicholas J. Timpson8, Seppo Koskinen, Scott I. Vrieze9, Laura J. Scott2, He Zhang2, Anubha Mahajan3, Jan H. Veldink, Ulrike Peters10, Ulrike Peters11, Carlos N. Pato12, Cornelia M. van Duijn13, Christopher E. Gillies2, Ilaria Gandin14, Massimo Mezzavilla, Arthur Gilly1, Massimiliano Cocca14, Michela Traglia, Andrea Angius7, Jeffrey C. Barrett1, D.I. Boomsma15, Kari Branham2, Gerome Breen16, Gerome Breen17, Chad M. Brummett2, Fabio Busonero7, Harry Campbell18, Andrew T. Chan19, Sai Chen2, Emily Y. Chew20, Francis S. Collins20, Laura J Corbin8, George Davey Smith8, George Dedoussis21, Marcus Dörr6, Aliki-Eleni Farmaki21, Luigi Ferrucci20, Lukas Forer22, Ross M. Fraser2, Stacey Gabriel23, Shawn Levy, Leif Groop24, Leif Groop25, Tabitha A. Harrison11, Andrew T. Hattersley5, Oddgeir L. Holmen26, Kristian Hveem26, Matthias Kretzler2, James Lee27, Matt McGue28, Thomas Meitinger29, David Melzer5, Josine L. Min8, Karen L. Mohlke30, John B. Vincent31, Matthias Nauck6, Deborah A. Nickerson10, Aarno Palotie23, Aarno Palotie19, Michele T. Pato12, Nicola Pirastu14, Melvin G. McInnis2, J. Brent Richards16, J. Brent Richards32, Cinzia Sala, Veikko Salomaa, David Schlessinger20, Sebastian Schoenherr22, P. Eline Slagboom33, Kerrin S. Small16, Tim D. Spector16, Dwight Stambolian34, Marcus A. Tuke5, Jaakko Tuomilehto, Leonard H. van den Berg, Wouter van Rheenen, Uwe Völker6, Cisca Wijmenga35, Daniela Toniolo, Eleftheria Zeggini1, Paolo Gasparini14, Matthew G. Sampson2, James F. Wilson18, Timothy M. Frayling5, Paul I.W. de Bakker36, Morris A. Swertz35, Steven A. McCarroll19, Charles Kooperberg11, Annelot M. Dekker, David Altshuler, Cristen J. Willer2, William G. Iacono28, Samuli Ripatti24, Nicole Soranzo1, Nicole Soranzo27, Klaudia Walter1, Anand Swaroop20, Francesco Cucca7, Carl A. Anderson1, Richard M. Myers, Michael Boehnke2, Mark I. McCarthy37, Mark I. McCarthy3, Richard Durbin1, Gonçalo R. Abecasis2, Jonathan Marchini3 
TL;DR: A reference panel of 64,976 human haplotypes at 39,235,157 SNPs constructed using whole-genome sequence data from 20 studies of predominantly European ancestry leads to accurate genotype imputation at minor allele frequencies as low as 0.1% and a large increase in the number of SNPs tested in association studies.
Abstract: We describe a reference panel of 64,976 human haplotypes at 39,235,157 SNPs constructed using whole-genome sequence data from 20 studies of predominantly European ancestry. Using this resource leads to accurate genotype imputation at minor allele frequencies as low as 0.1% and a large increase in the number of SNPs tested in association studies, and it can help to discover and refine causal loci. We describe remote server resources that allow researchers to carry out imputation and phasing consistently and efficiently.

2,149 citations

Shane A. McCarthy, Sayantan Das, Warren W. Kretzschmar, Olivier Delaneau, Andrew R. Wood, Alexander Teumer, Hyun Min Kang, Christian Fuchsberger, Petr Danecek, Kevin Sharp, Yang Luo, Carlo Sidorel, Alan Kwong, Nicholas J. Timpson, Seppo Koskinen, Scott I. Vrieze, Laura J. Scott, He Zhang, Anubha Mahajan, Jan H. Veldink, Ulrike Peters, Carlos N. Pato, Cornelia M. van Duijn, Christopher E. Gillies, Ilaria Gandin, Massimo Mezzavilla, Arthur Gilly, Massimiliano Cocca, Michela Traglia, Andrea Angius, Jeffrey C. Barrett, D.I. Boomsma, Kari Branham, Gerome Breen, Chad M. Brummett, Fabio Busonero, Harry Campbell, Andrew T. Chan, Sai Che, Emily Y. Chew, Francis S. Collins, Laura J Corbin, George Davey Smith, George Dedoussis, Marcus Dörr, Aliki-Eleni Farmaki, Luigi Ferrucci, Lukas Forer, Ross M. Fraser, Stacey Gabriel, Shawn Levy, Leif Groop, Tabitha A. Harrison, Andrew T. Hattersley, Oddgeir L. Holmen, Kristian Hveem, Matthias Kretzler, James Lee, Matt McGue, Thomas Meitinger, David Melzer, Josine L. Min, Karen L. Mohlke, John B. Vincent, Matthias Nauck, Deborah A. Nickerson, Aarno Palotie, Michele T. Pato, Nicola Pirastu, Melvin G. McInnis, J. Brent Richards, Cinzia Sala, Veikko Salomaa, David Schlessinger, Sebastian Schoenherr, P. Eline Slagboom, Kerrin S. Small, Tim D. Spector, Dwight Stambolian, Marcus A. Tuke, Jaakko Tuomilehto, Leonard H. van den Berg, Wouter van Rheenen, Uwe Völker, Cisca Wijmenga, Daniela Toniolo, Eleftheria Zeggini, Paolo Gasparini, Matthew G. Sampson, James F. Wilson, Timothy M. Frayling, Paul I.W. de Bakker, Morris A. Swertz, Steven A. McCarroll, Charles Kooperberg, Annelot M. Dekker, David Altshuler, Cristen J. Willer, William G. Iacono, Samuli Ripatti, Nicole Soranzo, Klaudia Walter, Anand Swaroop, Francesco Cucca, Carl A. Anderson, Richard M. Myers, Michael Boehnke, Mark I. McCarthy, Richard Durbin, Gonçalo R. Abecasis, Jonathan Marchini 
01 Jan 2016
TL;DR: In this article, a reference panel of 64,976 human haplotypes at 39,235,157 SNPs constructed using whole-genome sequence data from 20 studies of predominantly European ancestry is presented.
Abstract: We describe a reference panel of 64,976 human haplotypes at 39,235,157 SNPs constructed using whole-genome sequence data from 20 studies of predominantly European ancestry. Using this resource leads to accurate genotype imputation at minor allele frequencies as low as 0.1% and a large increase in the number of SNPs tested in association studies, and it can help to discover and refine causal loci. We describe remote server resources that allow researchers to carry out imputation and phasing consistently and efficiently.

1,261 citations

Posted ContentDOI
03 Oct 2019-bioRxiv
TL;DR: Analysis of the v8 data provides insights into the tissue-specificity of genetic effects, and shows that cell type composition is a key factor in understanding gene regulatory mechanisms in human tissues.
Abstract: The Genotype-Tissue Expression (GTEx) project was established to characterize genetic effects on the transcriptome across human tissues, and to link these regulatory mechanisms to trait and disease associations. Here, we present analyses of the v8 data, based on 17,382 RNA-sequencing samples from 54 tissues of 948 post-mortem donors. We comprehensively characterize genetic associations for gene expression and splicing in cis and trans, showing that regulatory associations are found for almost all genes, and describe the underlying molecular mechanisms and their contribution to allelic heterogeneity and pleiotropy of complex traits. Leveraging the large diversity of tissues, we provide insights into the tissue-specificity of genetic effects, and show that cell type composition is a key factor in understanding gene regulatory mechanisms in human tissues.

1,243 citations

Journal ArticleDOI
Daniel Taliun1, Daniel N. Harris2, Michael D. Kessler2, Jedidiah Carlson3  +202 moreInstitutions (61)
10 Feb 2021-Nature
TL;DR: The Trans-Omics for Precision Medicine (TOPMed) project as discussed by the authors aims to elucidate the genetic architecture and biology of heart, lung, blood and sleep disorders, with the ultimate goal of improving diagnosis, treatment and prevention of these diseases.
Abstract: The Trans-Omics for Precision Medicine (TOPMed) programme seeks to elucidate the genetic architecture and biology of heart, lung, blood and sleep disorders, with the ultimate goal of improving diagnosis, treatment and prevention of these diseases The initial phases of the programme focused on whole-genome sequencing of individuals with rich phenotypic data and diverse backgrounds Here we describe the TOPMed goals and design as well as the available resources and early insights obtained from the sequence data The resources include a variant browser, a genotype imputation server, and genomic and phenotypic data that are available through dbGaP (Database of Genotypes and Phenotypes)1 In the first 53,831 TOPMed samples, we detected more than 400 million single-nucleotide and insertion or deletion variants after alignment with the reference genome Additional previously undescribed variants were detected through assembly of unmapped reads and customized analysis in highly variable loci Among the more than 400 million detected variants, 97% have frequencies of less than 1% and 46% are singletons that are present in only one individual (53% among unrelated individuals) These rare variants provide insights into mutational processes and recent human evolutionary history The extensive catalogue of genetic variation in TOPMed studies provides unique opportunities for exploring the contributions of rare and noncoding sequence variants to phenotypic variation Furthermore, combining TOPMed haplotypes with modern imputation methods improves the power and reach of genome-wide association studies to include variants down to a frequency of approximately 001% The goals, resources and design of the NHLBI Trans-Omics for Precision Medicine (TOPMed) programme are described, and analyses of rare variants detected in the first 53,831 samples provide insights into mutational processes and recent human evolutionary history

801 citations


Cited by
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Journal ArticleDOI
11 Oct 2018-Nature
TL;DR: Deep phenotype and genome-wide genetic data from 500,000 individuals from the UK Biobank is described, describing population structure and relatedness in the cohort, and imputation to increase the number of testable variants to 96 million.
Abstract: The UK Biobank project is a prospective cohort study with deep genetic and phenotypic data collected on approximately 500,000 individuals from across the United Kingdom, aged between 40 and 69 at recruitment. The open resource is unique in its size and scope. A rich variety of phenotypic and health-related information is available on each participant, including biological measurements, lifestyle indicators, biomarkers in blood and urine, and imaging of the body and brain. Follow-up information is provided by linking health and medical records. Genome-wide genotype data have been collected on all participants, providing many opportunities for the discovery of new genetic associations and the genetic bases of complex traits. Here we describe the centralized analysis of the genetic data, including genotype quality, properties of population structure and relatedness of the genetic data, and efficient phasing and genotype imputation that increases the number of testable variants to around 96 million. Classical allelic variation at 11 human leukocyte antigen genes was imputed, resulting in the recovery of signals with known associations between human leukocyte antigen alleles and many diseases.

4,489 citations

01 Feb 2015
TL;DR: In this article, the authors describe the integrative analysis of 111 reference human epigenomes generated as part of the NIH Roadmap Epigenomics Consortium, profiled for histone modification patterns, DNA accessibility, DNA methylation and RNA expression.
Abstract: The reference human genome sequence set the stage for studies of genetic variation and its association with human disease, but epigenomic studies lack a similar reference. To address this need, the NIH Roadmap Epigenomics Consortium generated the largest collection so far of human epigenomes for primary cells and tissues. Here we describe the integrative analysis of 111 reference human epigenomes generated as part of the programme, profiled for histone modification patterns, DNA accessibility, DNA methylation and RNA expression. We establish global maps of regulatory elements, define regulatory modules of coordinated activity, and their likely activators and repressors. We show that disease- and trait-associated genetic variants are enriched in tissue-specific epigenomic marks, revealing biologically relevant cell types for diverse human traits, and providing a resource for interpreting the molecular basis of human disease. Our results demonstrate the central role of epigenomic information for understanding gene regulation, cellular differentiation and human disease.

4,409 citations

Journal ArticleDOI
17 Apr 2018-Immunity
TL;DR: An extensive immunogenomic analysis of more than 10,000 tumors comprising 33 diverse cancer types by utilizing data compiled by TCGA identifies six immune subtypes that encompass multiple cancer types and are hypothesized to define immune response patterns impacting prognosis.

3,246 citations

Journal ArticleDOI
TL;DR: The remarkable range of discoveriesGWASs has facilitated in population and complex-trait genetics, the biology of diseases, and translation toward new therapeutics are reviewed.
Abstract: Application of the experimental design of genome-wide association studies (GWASs) is now 10 years old (young), and here we review the remarkable range of discoveries it has facilitated in population and complex-trait genetics, the biology of diseases, and translation toward new therapeutics. We predict the likely discoveries in the next 10 years, when GWASs will be based on millions of samples with array data imputed to a large fully sequenced reference panel and on hundreds of thousands of samples with whole-genome sequencing data.

2,669 citations

Journal ArticleDOI
TL;DR: Improvements to imputation machinery are described that reduce computational requirements by more than an order of magnitude with no loss of accuracy in comparison to standard imputation tools.
Abstract: Christian Fuchsberger, Goncalo Abecasis and colleagues describe a new web-based imputation service that enables rapid imputation of large numbers of samples and allows convenient access to large reference panels of sequenced individuals. Their state space reduction provides a computationally efficient solution for genotype imputation with no loss in imputation accuracy.

2,556 citations