@article {6936, title = {A meta-analysis of 120 246 individuals identifies 18 new loci for fibrinogen concentration.}, journal = {Hum Mol Genet}, volume = {25}, year = {2016}, month = {2016 Jan 15}, pages = {358-70}, abstract = {

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 indels were examined. We identified 41 genome-wide significant fibrinogen loci; of which, 18 were newly identified. There were 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.

}, issn = {1460-2083}, doi = {10.1093/hmg/ddv454}, author = {de Vries, Paul S and Chasman, Daniel I and Sabater-Lleal, Maria and Chen, Ming-Huei and Huffman, Jennifer E and Steri, Maristella and Tang, Weihong and Teumer, Alexander and Marioni, Riccardo E and Grossmann, Vera and Hottenga, Jouke J and Trompet, Stella and M{\"u}ller-Nurasyid, Martina and Zhao, Jing Hua and Brody, Jennifer A and Kleber, Marcus E and Guo, Xiuqing and Wang, Jie Jin and Auer, Paul L and Attia, John R and Yanek, Lisa R and Ahluwalia, Tarunveer S and Lahti, Jari and Venturini, Cristina and Tanaka, Toshiko and Bielak, Lawrence F and Joshi, Peter K and Rocanin-Arjo, Ares and Kolcic, Ivana and Navarro, Pau and Rose, Lynda M and Oldmeadow, Christopher and Riess, Helene and Mazur, Johanna and Basu, Saonli and Goel, Anuj and Yang, Qiong and Ghanbari, Mohsen and Willemsen, Gonneke and Rumley, Ann and Fiorillo, Edoardo and de Craen, Anton J M and Grotevendt, Anne and Scott, Robert and Taylor, Kent D and Delgado, Graciela E and Yao, Jie and Kifley, Annette and Kooperberg, Charles and Qayyum, Rehan and Lopez, Lorna M and Berentzen, Tina L and R{\"a}ikk{\"o}nen, Katri and Mangino, Massimo and Bandinelli, Stefania and Peyser, Patricia A and Wild, Sarah and Tr{\'e}gou{\"e}t, David-Alexandre and Wright, Alan F and Marten, Jonathan and Zemunik, Tatijana and Morrison, Alanna C and Sennblad, Bengt and Tofler, Geoffrey and de Maat, Moniek P M and de Geus, Eco J C and Lowe, Gordon D and Zoledziewska, Magdalena and Sattar, Naveed and Binder, Harald and V{\"o}lker, Uwe and Waldenberger, Melanie and Khaw, Kay-Tee and McKnight, Barbara and Huang, Jie and Jenny, Nancy S and Holliday, Elizabeth G and Qi, Lihong and Mcevoy, Mark G and Becker, Diane M and Starr, John M and Sarin, Antti-Pekka and Hysi, Pirro G and Hernandez, Dena G and Jhun, Min A and Campbell, Harry and Hamsten, Anders and Rivadeneira, Fernando and McArdle, Wendy L and Slagboom, P Eline and Zeller, Tanja and Koenig, Wolfgang and Psaty, Bruce M and Haritunians, Talin and Liu, Jingmin and Palotie, Aarno and Uitterlinden, Andr{\'e} G and Stott, David J and Hofman, Albert and Franco, Oscar H and Polasek, Ozren and Rudan, Igor and Morange, Pierre-Emmanuel and Wilson, James F and Kardia, Sharon L R and Ferrucci, Luigi and Spector, Tim D and Eriksson, Johan G and Hansen, Torben and Deary, Ian J and Becker, Lewis C and Scott, Rodney J and Mitchell, Paul and M{\"a}rz, Winfried and Wareham, Nick J and Peters, Annette and Greinacher, Andreas and Wild, Philipp S and Jukema, J Wouter and Boomsma, Dorret I and Hayward, Caroline and Cucca, Francesco and Tracy, Russell and Watkins, Hugh and Reiner, Alex P and Folsom, Aaron R and Ridker, Paul M and O{\textquoteright}Donnell, Christopher J and Smith, Nicholas L and Strachan, David P and Dehghan, Abbas} } @article {7343, title = {Comparison of HapMap and 1000 Genomes Reference Panels in a Large-Scale Genome-Wide Association Study.}, journal = {PLoS One}, volume = {12}, year = {2017}, month = {2017}, pages = {e0167742}, abstract = {

An increasing number of genome-wide association (GWA) studies are now using the higher resolution 1000 Genomes Project reference panel (1000G) for imputation, with the expectation that 1000G imputation will lead to the discovery of additional associated loci when compared to HapMap imputation. In order to assess the improvement of 1000G over HapMap imputation in identifying associated loci, we compared the results of GWA studies of circulating fibrinogen based on the two reference panels. Using both HapMap and 1000G imputation we performed a meta-analysis of 22 studies comprising the same 91,953 individuals. We identified six additional signals using 1000G imputation, while 29 loci were associated using both HapMap and 1000G imputation. One locus identified using HapMap imputation was not significant using 1000G imputation. The genome-wide significance threshold of 5{\texttimes}10-8 is based on the number of independent statistical tests using HapMap imputation, and 1000G imputation may lead to further independent tests that should be corrected for. When using a stricter Bonferroni correction for the 1000G GWA study (P-value < 2.5{\texttimes}10-8), the number of loci significant only using HapMap imputation increased to 4 while the number of loci significant only using 1000G decreased to 5. In conclusion, 1000G imputation enabled the identification of 20\% more loci than HapMap imputation, although the advantage of 1000G imputation became less clear when a stricter Bonferroni correction was used. More generally, our results provide insights that are applicable to the implementation of other dense reference panels that are under development.

}, issn = {1932-6203}, doi = {10.1371/journal.pone.0167742}, author = {de Vries, Paul S and Sabater-Lleal, Maria and Chasman, Daniel I and Trompet, Stella and Ahluwalia, Tarunveer S and Teumer, Alexander and Kleber, Marcus E and Chen, Ming-Huei and Wang, Jie Jin and Attia, John R and Marioni, Riccardo E and Steri, Maristella and Weng, Lu-Chen and Pool, Rene and Grossmann, Vera and Brody, Jennifer A and Venturini, Cristina and Tanaka, Toshiko and Rose, Lynda M and Oldmeadow, Christopher and Mazur, Johanna and Basu, Saonli and Fr{\r a}nberg, Mattias and Yang, Qiong and Ligthart, Symen and Hottenga, Jouke J and Rumley, Ann and Mulas, Antonella and de Craen, Anton J M and Grotevendt, Anne and Taylor, Kent D and Delgado, Graciela E and Kifley, Annette and Lopez, Lorna M and Berentzen, Tina L and Mangino, Massimo and Bandinelli, Stefania and Morrison, Alanna C and Hamsten, Anders and Tofler, Geoffrey and de Maat, Moniek P M and Draisma, Harmen H M and Lowe, Gordon D and Zoledziewska, Magdalena and Sattar, Naveed and Lackner, Karl J and V{\"o}lker, Uwe and McKnight, Barbara and Huang, Jie and Holliday, Elizabeth G and McEvoy, Mark A and Starr, John M and Hysi, Pirro G and Hernandez, Dena G and Guan, Weihua and Rivadeneira, Fernando and McArdle, Wendy L and Slagboom, P Eline and Zeller, Tanja and Psaty, Bruce M and Uitterlinden, Andr{\'e} G and de Geus, Eco J C and Stott, David J and Binder, Harald and Hofman, Albert and Franco, Oscar H and Rotter, Jerome I and Ferrucci, Luigi and Spector, Tim D and Deary, Ian J and M{\"a}rz, Winfried and Greinacher, Andreas and Wild, Philipp S and Cucca, Francesco and Boomsma, Dorret I and Watkins, Hugh and Tang, Weihong and Ridker, Paul M and Jukema, Jan W and Scott, Rodney J and Mitchell, Paul and Hansen, Torben and O{\textquoteright}Donnell, Christopher J and Smith, Nicholas L and Strachan, David P and Dehghan, Abbas} } @article {7364, title = {Genome-wide Trans-ethnic Meta-analysis Identifies Seven Genetic Loci Influencing Erythrocyte Traits and a Role for RBPMS in Erythropoiesis.}, journal = {Am J Hum Genet}, volume = {100}, year = {2017}, month = {2017 Jan 05}, pages = {51-63}, abstract = {

Genome-wide association studies (GWASs) have identified loci for erythrocyte traits in primarily European ancestry populations. We conducted GWAS meta-analyses of six erythrocyte traits in 71,638 individuals from European, East Asian, and African ancestries using a Bayesian approach to account for heterogeneity in allelic effects and variation in the structure of linkage disequilibrium between ethnicities. We identified seven loci for erythrocyte traits including a locus (RBPMS/GTF2E2) associated with mean corpuscular hemoglobin and mean corpuscular volume. Statistical fine-mapping at this locus pointed to RBPMS at this locus and excluded nearby GTF2E2. Using zebrafish morpholino to evaluate loss of function, we observed a strong in~vivo erythropoietic effect for RBPMS but not for GTF2E2, supporting the statistical fine-mapping at this locus and demonstrating that RBPMS is a regulator of erythropoiesis. Our findings show the utility of trans-ethnic GWASs for discovery and characterization of genetic loci influencing hematologic traits.

}, issn = {1537-6605}, doi = {10.1016/j.ajhg.2016.11.016}, author = {van Rooij, Frank J A and Qayyum, Rehan and Smith, Albert V and Zhou, Yi and Trompet, Stella and Tanaka, Toshiko and Keller, Margaux F and Chang, Li-Ching and Schmidt, Helena and Yang, Min-Lee and Chen, Ming-Huei and Hayes, James and Johnson, Andrew D and Yanek, Lisa R and Mueller, Christian and Lange, Leslie and Floyd, James S and Ghanbari, Mohsen and Zonderman, Alan B and Jukema, J Wouter and Hofman, Albert and van Duijn, Cornelia M and Desch, Karl C and Saba, Yasaman and Ozel, Ayse B and Snively, Beverly M and Wu, Jer-Yuarn and Schmidt, Reinhold and Fornage, Myriam and Klein, Robert J and Fox, Caroline S and Matsuda, Koichi and Kamatani, Naoyuki and Wild, Philipp S and Stott, David J and Ford, Ian and Slagboom, P Eline and Yang, Jaden and Chu, Audrey Y and Lambert, Amy J and Uitterlinden, Andr{\'e} G and Franco, Oscar H and Hofer, Edith and Ginsburg, David and Hu, Bella and Keating, Brendan and Schick, Ursula M and Brody, Jennifer A and Li, Jun Z and Chen, Zhao and Zeller, Tanja and Guralnik, Jack M and Chasman, Daniel I and Peters, Luanne L and Kubo, Michiaki and Becker, Diane M and Li, Jin and Eiriksdottir, Gudny and Rotter, Jerome I and Levy, Daniel and Grossmann, Vera and Patel, Kushang V and Chen, Chien-Hsiun and Ridker, Paul M and Tang, Hua and Launer, Lenore J and Rice, Kenneth M and Li-Gao, Ruifang and Ferrucci, Luigi and Evans, Michelle K and Choudhuri, Avik and Trompouki, Eirini and Abraham, Brian J and Yang, Song and Takahashi, Atsushi and Kamatani, Yoichiro and Kooperberg, Charles and Harris, Tamara B and Jee, Sun Ha and Coresh, Josef and Tsai, Fuu-Jen and Longo, Dan L and Chen, Yuan-Tsong and Felix, Janine F and Yang, Qiong and Psaty, Bruce M and Boerwinkle, Eric and Becker, Lewis C and Mook-Kanamori, Dennis O and Wilson, James G and Gudnason, Vilmundur and O{\textquoteright}Donnell, Christopher J and Dehghan, Abbas and Cupples, L Adrienne and Nalls, Michael A and Morris, Andrew P and Okada, Yukinori and Reiner, Alexander P and Zon, Leonard I and Ganesh, Santhi K} }