User profiles for Harm Jan Westra
 | Harm-Jan WestraPostdoc at the University Medical Center Groningen Verified email at umcg.nl Cited by 35944 |
Large-scale cis- and trans-eQTL analyses identify thousands of genetic loci and polygenic scores that regulate blood gene expression
Trait-associated genetic variants affect complex phenotypes primarily via regulatory mechanisms
on the transcriptome. To investigate the genetics of gene expression, we performed cis…
on the transcriptome. To investigate the genetics of gene expression, we performed cis…
Genetics of rheumatoid arthritis contributes to biology and drug discovery
A major challenge in human genetics is to devise a systematic strategy to integrate disease-associated
variants with diverse genomic and biological data sets to provide insight into …
variants with diverse genomic and biological data sets to provide insight into …
Systematic identification of trans eQTLs as putative drivers of known disease associations
Identifying the downstream effects of disease-associated SNPs is challenging. To help
overcome this problem, we performed expression quantitative trait locus (eQTL) meta-analysis in …
overcome this problem, we performed expression quantitative trait locus (eQTL) meta-analysis in …
Association analyses identify 38 susceptibility loci for inflammatory bowel disease and highlight shared genetic risk across populations
…, A Sood, JJY Sung, R Malekzadeh, HJ Westra… - Nature …, 2015 - nature.com
Ulcerative colitis and Crohn's disease are the two main forms of inflammatory bowel disease
(IBD). Here we report the first trans-ancestry association study of IBD, with genome-wide or …
(IBD). Here we report the first trans-ancestry association study of IBD, with genome-wide or …
Large-scale association analyses identify host factors influencing human gut microbiome composition
To study the effect of host genetics on gut microbiome composition, the MiBioGen consortium
curated and analyzed genome-wide genotypes and 16S fecal microbiome data from …
curated and analyzed genome-wide genotypes and 16S fecal microbiome data from …
Defining the role of common variation in the genomic and biological architecture of adult human height
…, JC Randall, A Scherag, AAE Vinkhuyzen, HJ Westra… - Nature …, 2014 - nature.com
Using genome-wide data from 253,288 individuals, we identified 697 variants at genome-wide
significance that together explained one-fifth of the heritability for adult height. By testing …
significance that together explained one-fifth of the heritability for adult height. By testing …
Genome-wide association study identifies 74 loci associated with educational attainment
Educational attainment is strongly influenced by social and other environmental factors, but
genetic factors are estimated to account for at least 20% of the variation across individuals 1. …
genetic factors are estimated to account for at least 20% of the variation across individuals 1. …
Meta-analysis identifies 29 additional ulcerative colitis risk loci, increasing the number of confirmed associations to 47
Genome-wide association studies and candidate gene studies in ulcerative colitis have
identified 18 susceptibility loci. We conducted a meta-analysis of six ulcerative colitis genome-…
identified 18 susceptibility loci. We conducted a meta-analysis of six ulcerative colitis genome-…
Genetic variants associated with subjective well-being, depressive symptoms, and neuroticism identified through genome-wide analyses
…, G Thorleifsson, J Wedenoja, J Wellmann, HJ Westra… - Nature …, 2016 - nature.com
Very few genetic variants have been associated with depression and neuroticism, likely
because of limitations on sample size in previous studies. Subjective well-being, a phenotype …
because of limitations on sample size in previous studies. Subjective well-being, a phenotype …
GWAS of 126,559 individuals identifies genetic variants associated with educational attainment
A genome-wide association study (GWAS) of educational attainment was conducted in a
discovery sample of 101,069 individuals and a replication sample of 25,490. Three …
discovery sample of 101,069 individuals and a replication sample of 25,490. Three …