@article {7724, title = {Trans-ethnic meta-analysis of white blood cell phenotypes.}, journal = {Hum Mol Genet}, volume = {23}, year = {2014}, month = {2014 Dec 20}, pages = {6944-60}, abstract = {

White blood cell (WBC) count is a common clinical measure used as a predictor of certain aspects of human health, including immunity and infection status. WBC count is also a complex trait that varies among individuals and ancestry groups. Differences in linkage disequilibrium structure and heterogeneity in allelic effects are expected to play a role in the associations observed between populations. Prior genome-wide association study (GWAS) meta-analyses have identified genomic loci associated with WBC and its subtypes, but much of the heritability of these phenotypes remains unexplained. Using GWAS summary statistics for over 50 000 individuals from three diverse populations (Japanese, African-American and European ancestry), a Bayesian model methodology was employed to account for heterogeneity between ancestry groups. This approach was used to perform a trans-ethnic meta-analysis of total WBC, neutrophil and monocyte counts. Ten previously known associations were replicated and six new loci were identified, including several regions harboring genes related to inflammation and immune cell function. Ninety-five percent credible interval regions were calculated to narrow the association signals and fine-map the putatively causal variants within loci. Finally, a conditional analysis was performed on the most significant SNPs identified by the trans-ethnic meta-analysis (MA), and nine secondary signals within loci previously associated with WBC or its subtypes were identified. This work illustrates the potential of trans-ethnic analysis and ascribes a critical role to multi-ethnic cohorts and consortia in exploring complex phenotypes with respect to variants that lie outside the European-biased GWAS pool.

}, keywords = {African Americans, Asian Continental Ancestry Group, Bayes Theorem, European Continental Ancestry Group, Genome, Human, Genome-Wide Association Study, Genotype, Humans, Leukocyte Count, Leukocytes, Linkage Disequilibrium, Phenotype, Polymorphism, Single Nucleotide, Quantitative Trait Loci}, issn = {1460-2083}, doi = {10.1093/hmg/ddu401}, author = {Keller, Margaux F and Reiner, Alexander P and Okada, Yukinori and van Rooij, Frank J A and Johnson, Andrew D and Chen, Ming-Huei and Smith, Albert V and Morris, Andrew P and Tanaka, Toshiko and Ferrucci, Luigi and Zonderman, Alan B and Lettre, Guillaume and Harris, Tamara and Garcia, Melissa and Bandinelli, Stefania and Qayyum, Rehan and Yanek, Lisa R and Becker, Diane M and Becker, Lewis C and Kooperberg, Charles and Keating, Brendan and Reis, Jared and Tang, Hua and Boerwinkle, Eric and Kamatani, Yoichiro and Matsuda, Koichi and Kamatani, Naoyuki and Nakamura, Yusuke and Kubo, Michiaki and Liu, Simin and Dehghan, Abbas and Felix, Janine F and Hofman, Albert and Uitterlinden, Andr{\'e} G and van Duijn, Cornelia M and Franco, Oscar H and Longo, Dan L and Singleton, Andrew B and Psaty, Bruce M and Evans, Michelle K and Cupples, L Adrienne and Rotter, Jerome I and O{\textquoteright}Donnell, Christopher J and Takahashi, Atsushi and Wilson, James G and Ganesh, Santhi K and Nalls, Mike A} } @article {1790, title = {Multiple loci are associated with white blood cell phenotypes.}, journal = {PLoS Genet}, volume = {7}, year = {2011}, month = {2011 Jun}, pages = {e1002113}, abstract = {

White blood cell (WBC) count is a common clinical measure from complete blood count assays, and it varies widely among healthy individuals. Total WBC count and its constituent subtypes have been shown to be moderately heritable, with the heritability estimates varying across cell types. We studied 19,509 subjects from seven cohorts in a discovery analysis, and 11,823 subjects from ten cohorts for replication analyses, to determine genetic factors influencing variability within the normal hematological range for total WBC count and five WBC subtype measures. Cohort specific data was supplied by the CHARGE, HeamGen, and INGI consortia, as well as independent collaborative studies. We identified and replicated ten associations with total WBC count and five WBC subtypes at seven different genomic loci (total WBC count-6p21 in the HLA region, 17q21 near ORMDL3, and CSF3; neutrophil count-17q21; basophil count- 3p21 near RPN1 and C3orf27; lymphocyte count-6p21, 19p13 at EPS15L1; monocyte count-2q31 at ITGA4, 3q21, 8q24 an intergenic region, 9q31 near EDG2), including three previously reported associations and seven novel associations. To investigate functional relationships among variants contributing to variability in the six WBC traits, we utilized gene expression- and pathways-based analyses. We implemented gene-clustering algorithms to evaluate functional connectivity among implicated loci and showed functional relationships across cell types. Gene expression data from whole blood was utilized to show that significant biological consequences can be extracted from our genome-wide analyses, with effect estimates for significant loci from the meta-analyses being highly corellated with the proximal gene expression. In addition, collaborative efforts between the groups contributing to this study and related studies conducted by the COGENT and RIKEN groups allowed for the examination of effect homogeneity for genome-wide significant associations across populations of diverse ancestral backgrounds.

}, keywords = {Genetic Loci, Genome-Wide Association Study, Humans, Leukocyte Count, Leukocytes, Molecular Epidemiology, Multigene Family, Phenotype, Polymorphism, Single Nucleotide, Ubiquitin-Protein Ligases}, issn = {1553-7404}, doi = {10.1371/journal.pgen.1002113}, author = {Nalls, Michael A and Couper, David J and Tanaka, Toshiko and van Rooij, Frank J A and Chen, Ming-Huei and Smith, Albert V and Toniolo, Daniela and Zakai, Neil A and Yang, Qiong and Greinacher, Andreas and Wood, Andrew R and Garcia, Melissa and Gasparini, Paolo and Liu, Yongmei and Lumley, Thomas and Folsom, Aaron R and Reiner, Alex P and Gieger, Christian and Lagou, Vasiliki and Felix, Janine F and V{\"o}lzke, Henry and Gouskova, Natalia A and Biffi, Alessandro and D{\"o}ring, Angela and V{\"o}lker, Uwe and Chong, Sean and Wiggins, Kerri L and Rendon, Augusto and Dehghan, Abbas and Moore, Matt and Taylor, Kent and Wilson, James G and Lettre, Guillaume and Hofman, Albert and Bis, Joshua C and Pirastu, Nicola and Fox, Caroline S and Meisinger, Christa and Sambrook, Jennifer and Arepalli, Sampath and Nauck, Matthias and Prokisch, Holger and Stephens, Jonathan and Glazer, Nicole L and Cupples, L Adrienne and Okada, Yukinori and Takahashi, Atsushi and Kamatani, Yoichiro and Matsuda, Koichi and Tsunoda, Tatsuhiko and Tanaka, Toshihiro and Kubo, Michiaki and Nakamura, Yusuke and Yamamoto, Kazuhiko and Kamatani, Naoyuki and Stumvoll, Michael and T{\"o}njes, Anke and Prokopenko, Inga and Illig, Thomas and Patel, Kushang V and Garner, Stephen F and Kuhnel, Brigitte and Mangino, Massimo and Oostra, Ben A and Thein, Swee Lay and Coresh, Josef and Wichmann, H-Erich and Menzel, Stephan and Lin, JingPing and Pistis, Giorgio and Uitterlinden, Andr{\'e} G and Spector, Tim D and Teumer, Alexander and Eiriksdottir, Gudny and Gudnason, Vilmundur and Bandinelli, Stefania and Frayling, Timothy M and Chakravarti, Aravinda and van Duijn, Cornelia M and Melzer, David and Ouwehand, Willem H and Levy, Daniel and Boerwinkle, Eric and Singleton, Andrew B and Hernandez, Dena G and Longo, Dan L and Soranzo, Nicole and Witteman, Jacqueline C M and Psaty, Bruce M and Ferrucci, Luigi and Harris, Tamara B and O{\textquoteright}Donnell, Christopher J and Ganesh, Santhi K} } @article {1734, title = {Thirty new loci for age at menarche identified by a meta-analysis of genome-wide association studies.}, journal = {Nat Genet}, volume = {42}, year = {2010}, month = {2010 Dec}, pages = {1077-85}, abstract = {

To identify loci for age at menarche, we performed a meta-analysis of 32 genome-wide association studies in 87,802 women of European descent, with replication in up to 14,731 women. In addition to the known loci at LIN28B (P = 5.4 {\texttimes} 10$^{-}$$^{6}$$^{0}$) and 9q31.2 (P = 2.2 {\texttimes} 10$^{-}${\textthreesuperior}{\textthreesuperior}), we identified 30 new menarche loci (all P < 5 {\texttimes} 10$^{-}$$^{8}$) and found suggestive evidence for a further 10 loci (P < 1.9 {\texttimes} 10$^{-}$$^{6}$). The new loci included four previously associated with body mass index (in or near FTO, SEC16B, TRA2B and TMEM18), three in or near other genes implicated in energy homeostasis (BSX, CRTC1 and MCHR2) and three in or near genes implicated in hormonal regulation (INHBA, PCSK2 and RXRG). Ingenuity and gene-set enrichment pathway analyses identified coenzyme A and fatty acid biosynthesis as biological processes related to menarche timing.

}, keywords = {Adolescent, Aging, Body Height, Body Size, Child, DNA Copy Number Variations, Female, Genetic Loci, Genetic Predisposition to Disease, Genome-Wide Association Study, Humans, Inheritance Patterns, Menarche, Obesity, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Reproducibility of Results, Time Factors}, issn = {1546-1718}, doi = {10.1038/ng.714}, author = {Elks, Cathy E and Perry, John R B and Sulem, Patrick and Chasman, Daniel I and Franceschini, Nora and He, Chunyan and Lunetta, Kathryn L and Visser, Jenny A and Byrne, Enda M and Cousminer, Diana L and Gudbjartsson, Daniel F and Esko, T{\~o}nu and Feenstra, Bjarke and Hottenga, Jouke-Jan and Koller, Daniel L and Kutalik, Zolt{\'a}n and Lin, Peng and Mangino, Massimo and Marongiu, Mara and McArdle, Patrick F and Smith, Albert V and Stolk, Lisette and van Wingerden, Sophie H and Zhao, Jing Hua and Albrecht, Eva and Corre, Tanguy and Ingelsson, Erik and Hayward, Caroline and Magnusson, Patrik K E and Smith, Erin N and Ulivi, Shelia and Warrington, Nicole M and Zgaga, Lina and Alavere, Helen and Amin, Najaf and Aspelund, Thor and Bandinelli, Stefania and Barroso, In{\^e}s and Berenson, Gerald S and Bergmann, Sven and Blackburn, Hannah and Boerwinkle, Eric and Buring, Julie E and Busonero, Fabio and Campbell, Harry and Chanock, Stephen J and Chen, Wei and Cornelis, Marilyn C and Couper, David and Coviello, Andrea D and d{\textquoteright}Adamo, Pio and de Faire, Ulf and de Geus, Eco J C and Deloukas, Panos and D{\"o}ring, Angela and Smith, George Davey and Easton, Douglas F and Eiriksdottir, Gudny and Emilsson, Valur and Eriksson, Johan and Ferrucci, Luigi and Folsom, Aaron R and Foroud, Tatiana and Garcia, Melissa and Gasparini, Paolo and Geller, Frank and Gieger, Christian and Gudnason, Vilmundur and Hall, Per and Hankinson, Susan E and Ferreli, Liana and Heath, Andrew C and Hernandez, Dena G and Hofman, Albert and Hu, Frank B and Illig, Thomas and J{\"a}rvelin, Marjo-Riitta and Johnson, Andrew D and Karasik, David and Khaw, Kay-Tee and Kiel, Douglas P and Kilpel{\"a}inen, Tuomas O and Kolcic, Ivana and Kraft, Peter and Launer, Lenore J and Laven, Joop S E and Li, Shengxu and Liu, Jianjun and Levy, Daniel and Martin, Nicholas G and McArdle, Wendy L and Melbye, Mads and Mooser, Vincent and Murray, Jeffrey C and Murray, Sarah S and Nalls, Michael A and Navarro, Pau and Nelis, Mari and Ness, Andrew R and Northstone, Kate and Oostra, Ben A and Peacock, Munro and Palmer, Lyle J and Palotie, Aarno and Par{\'e}, Guillaume and Parker, Alex N and Pedersen, Nancy L and Peltonen, Leena and Pennell, Craig E and Pharoah, Paul and Polasek, Ozren and Plump, Andrew S and Pouta, Anneli and Porcu, Eleonora and Rafnar, Thorunn and Rice, John P and Ring, Susan M and Rivadeneira, Fernando and Rudan, Igor and Sala, Cinzia and Salomaa, Veikko and Sanna, Serena and Schlessinger, David and Schork, Nicholas J and Scuteri, Angelo and Segr{\`e}, Ayellet V and Shuldiner, Alan R and Soranzo, Nicole and Sovio, Ulla and Srinivasan, Sathanur R and Strachan, David P and Tammesoo, Mar-Liis and Tikkanen, Emmi and Toniolo, Daniela and Tsui, Kim and Tryggvadottir, Laufey and Tyrer, Jonathon and Uda, Manuela and van Dam, Rob M and van Meurs, Joyce B J and Vollenweider, Peter and Waeber, Gerard and Wareham, Nicholas J and Waterworth, Dawn M and Weedon, Michael N and Wichmann, H Erich and Willemsen, Gonneke and Wilson, James F and Wright, Alan F and Young, Lauren and Zhai, Guangju and Zhuang, Wei Vivian and Bierut, Laura J and Boomsma, Dorret I and Boyd, Heather A and Crisponi, Laura and Demerath, Ellen W and van Duijn, Cornelia M and Econs, Michael J and Harris, Tamara B and Hunter, David J and Loos, Ruth J F and Metspalu, Andres and Montgomery, Grant W and Ridker, Paul M and Spector, Tim D and Streeten, Elizabeth A and Stefansson, Kari and Thorsteinsdottir, Unnur and Uitterlinden, Andr{\'e} G and Widen, Elisabeth and Murabito, Joanne M and Ong, Ken K and Murray, Anna} }