Genome-wide association studies have previously identified 23 genetic loci associated with circulating fibrinogen concentration. These studies used HapMap imputation and did not examine the X-chromosome. 1000 Genomes imputation provides better coverage of uncommon variants, and includes indels.We conducted a genome-wide association analysis of 34 studies imputed to the 1000 Genomes Project reference panel and including ~120 000 participants of European ancestry (95 806 participants with data on the X-chromosome). Approximately 10.7 million single-nucleotide polymorphisms and 1.2 million indelswere examined.We identified 41 genome-wide significant fibrinogen loci; of which, 18were newly identified. Therewere no genome-wide significant signals on the X-chromosome. The lead variants of five significant loci were indels. We further identified six additional independent signals, including three rare variants, at two previously characterized loci: FGB and IRF1. Together the 41 loci explain 3% of the variance in plasma fibrinogen concentration.

dx.doi.org/10.1093/hmg/ddv454, hdl.handle.net/1765/83304
Human Molecular Genetics
This work was funded by the European Commission 7th Framework Programme; grant id fp7/201413 - European Network for Genetic and Genomic Epidemiology (ENGAGE), This work was funded by the European Commission 7th Framework Programme; grant id fp7/223004 - A PHArmacogenomic study of Statins in the Elderly at risk for cardiovascular disease (PHASE)
Department of Internal Medicine

de Vries, P.S, Chasman, D.I, Sabater-Lleal, M, Chen, M.-H, Huffman, J.E, Steri, M, … Dehghan, A. (2016). A meta-analysis of 120 246 individuals identifies 18 new loci for fibrinogen concentration. Human Molecular Genetics, 25(2), 358–370. doi:10.1093/hmg/ddv454