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Your search keyword '"Dorajoo Rajkumar"' showing total 14 results
Start Over Author "Dorajoo Rajkumar" Publisher escholarship, university of california
14 results on '"Dorajoo Rajkumar"'

1. A saturated map of common genetic variants associated with human height

Author

Yengo, Loïc, Vedantam, Sailaja, Marouli, Eirini, Sidorenko, Julia, Bartell, Eric, Sakaue, Saori, Graff, Marielisa, Eliasen, Anders U, Jiang, Yunxuan, Raghavan, Sridharan, Miao, Jenkai, Arias, Joshua D, Graham, Sarah E, Mukamel, Ronen E, Spracklen, Cassandra N, Yin, Xianyong, Chen, Shyh-Huei, Ferreira, Teresa, Highland, Heather H, Ji, Yingjie, Karaderi, Tugce, Lin, Kuang, Lüll, Kreete, Malden, Deborah E, Medina-Gomez, Carolina, Machado, Moara, Moore, Amy, Rüeger, Sina, Sim, Xueling, Vrieze, Scott, Ahluwalia, Tarunveer S, Akiyama, Masato, Allison, Matthew A, Alvarez, Marcus, Andersen, Mette K, Ani, Alireza, Appadurai, Vivek, Arbeeva, Liubov, Bhaskar, Seema, Bielak, Lawrence F, Bollepalli, Sailalitha, Bonnycastle, Lori L, Bork-Jensen, Jette, Bradfield, Jonathan P, Bradford, Yuki, Braund, Peter S, Brody, Jennifer A, Burgdorf, Kristoffer S, Cade, Brian E, Cai, Hui, Cai, Qiuyin, Campbell, Archie, Cañadas-Garre, Marisa, Catamo, Eulalia, Chai, Jin-Fang, Chai, Xiaoran, Chang, Li-Ching, Chang, Yi-Cheng, Chen, Chien-Hsiun, Chesi, Alessandra, Choi, Seung Hoan, Chung, Ren-Hua, Cocca, Massimiliano, Concas, Maria Pina, Couture, Christian, Cuellar-Partida, Gabriel, Danning, Rebecca, Daw, E Warwick, Degenhard, Frauke, Delgado, Graciela E, Delitala, Alessandro, Demirkan, Ayse, Deng, Xuan, Devineni, Poornima, Dietl, Alexander, Dimitriou, Maria, Dimitrov, Latchezar, Dorajoo, Rajkumar, Ekici, Arif B, Engmann, Jorgen E, Fairhurst-Hunter, Zammy, Farmaki, Aliki-Eleni, Faul, Jessica D, Fernandez-Lopez, Juan-Carlos, Forer, Lukas, Francescatto, Margherita, Freitag-Wolf, Sandra, Fuchsberger, Christian, Galesloot, Tessel E, Gao, Yan, Gao, Zishan, Geller, Frank, Giannakopoulou, Olga, Giulianini, Franco, Gjesing, Anette P, Goel, Anuj, Gordon, Scott D, Gorski, Mathias, Grove, Jakob, and Guo, Xiuqing

Subjects
Epidemiology, Biological Sciences, Health Sciences, Genetics, Human Genome, Humans, Body Height, Gene Frequency, Genome, Human, Genome-Wide Association Study, Haplotypes, Linkage Disequilibrium, Polymorphism, Single Nucleotide, Europe, Sample Size, Phenotype, Chromosome Mapping, 23andMe Research Team, VA Million Veteran Program, DiscovEHR, eMERGE, Lifelines Cohort Study, PRACTICAL Consortium, Understanding Society Scientific Group, General Science & Technology
Abstract

Common single-nucleotide polymorphisms (SNPs) are predicted to collectively explain 40-50% of phenotypic variation in human height, but identifying the specific variants and associated regions requires huge sample sizes1. Here, using data from a genome-wide association study of 5.4 million individuals of diverse ancestries, we show that 12,111 independent SNPs that are significantly associated with height account for nearly all of the common SNP-based heritability. These SNPs are clustered within 7,209 non-overlapping genomic segments with a mean size of around 90 kb, covering about 21% of the genome. The density of independent associations varies across the genome and the regions of increased density are enriched for biologically relevant genes. In out-of-sample estimation and prediction, the 12,111 SNPs (or all SNPs in the HapMap 3 panel2) account for 40% (45%) of phenotypic variance in populations of European ancestry but only around 10-20% (14-24%) in populations of other ancestries. Effect sizes, associated regions and gene prioritization are similar across ancestries, indicating that reduced prediction accuracy is likely to be explained by linkage disequilibrium and differences in allele frequency within associated regions. Finally, we show that the relevant biological pathways are detectable with smaller sample sizes than are needed to implicate causal genes and variants. Overall, this study provides a comprehensive map of specific genomic regions that contain the vast majority of common height-associated variants. Although this map is saturated for populations of European ancestry, further research is needed to achieve equivalent saturation in other ancestries.

Published
2022

2. Genome-wide association analyses of physical activity and sedentary behavior provide insights into underlying mechanisms and roles in disease prevention.

Author

Wang, Zhe, Emmerich, Andrew, Pillon, Nicolas, Moore, Tim, Hemerich, Daiane, Cornelis, Marilyn, Mazzaferro, Eugenia, Broos, Siacia, Ahluwalia, Tarunveer, Bartz, Traci, Bentley, Amy, Bielak, Lawrence, Chong, Mike, Chu, Audrey, Berry, Diane, Dorajoo, Rajkumar, Dueker, Nicole, Kasbohm, Elisa, Feenstra, Bjarke, Feitosa, Mary, Gieger, Christian, Graff, Mariaelisa, Hall, Leanne, Haller, Toomas, Hartwig, Fernando, Hillis, David, Huikari, Ville, Heard-Costa, Nancy, Holzapfel, Christina, Jackson, Anne, Johansson, Åsa, Jørgensen, Anja, Kaakinen, Marika, Karlsson, Robert, Kerr, Kathleen, Kim, Boram, Koolhaas, Chantal, Kutalik, Zoltan, Lagou, Vasiliki, Lind, Penelope, Lorentzon, Mattias, Lyytikäinen, Leo-Pekka, Mangino, Massimo, Metzendorf, Christoph, Monroe, Kristine, Pacolet, Alexander, Pérusse, Louis, Pool, Rene, Richmond, Rebecca, Rivera, Natalia, Robiou-du-Pont, Sebastien, Schraut, Katharina, Schulz, Christina-Alexandra, Stringham, Heather, Tanaka, Toshiko, Teumer, Alexander, Turman, Constance, van der Most, Peter, Vanmunster, Mathias, van Rooij, Frank, van Vliet-Ostaptchouk, Jana, Zhang, Xiaoshuai, Zhao, Jing-Hua, Zhao, Wei, Balkhiyarova, Zhanna, Balslev-Harder, Marie, Baumeister, Sebastian, Beilby, John, Blangero, John, Boomsma, Dorret, Brage, Soren, Braund, Peter, Brody, Jennifer, Bruinenberg, Marcel, Ekelund, Ulf, Liu, Ching-Ti, Cole, John, Collins, Francis, Cupples, L, Esko, Tõnu, Enroth, Stefan, Faul, Jessica, Fernandez-Rhodes, Lindsay, Fohner, Alison, Franco, Oscar, Galesloot, Tessel, Gordon, Scott, Grarup, Niels, Hartman, Catharina, Heiss, Gerardo, Hui, Jennie, Illig, Thomas, Jago, Russell, James, Alan, Joshi, Peter, Jung, Taeyeong, Kähönen, Mika, Kilpeläinen, Tuomas, Koh, Woon-Puay, and Kolcic, Ivana

Subjects
Actinin, Cross-Sectional Studies, Exercise, Genome-Wide Association Study, Humans, Leisure Activities, Sedentary Behavior
Abstract

Although physical activity and sedentary behavior are moderately heritable, little is known about the mechanisms that influence these traits. Combining data for up to 703,901 individuals from 51 studies in a multi-ancestry meta-analysis of genome-wide association studies yields 99 loci that associate with self-reported moderate-to-vigorous intensity physical activity during leisure time (MVPA), leisure screen time (LST) and/or sedentary behavior at work. Loci associated with LST are enriched for genes whose expression in skeletal muscle is altered by resistance training. A missense variant in ACTN3 makes the alpha-actinin-3 filaments more flexible, resulting in lower maximal force in isolated type IIA muscle fibers, and possibly protection from exercise-induced muscle damage. Finally, Mendelian randomization analyses show that beneficial effects of lower LST and higher MVPA on several risk factors and diseases are mediated or confounded by body mass index (BMI). Our results provide insights into physical activity mechanisms and its role in disease prevention.

Published
2022

3. Gene-educational attainment interactions in a multi-ancestry genome-wide meta-analysis identify novel blood pressure loci.

Author

de Las Fuentes, Lisa, Sung, Yun Ju, Noordam, Raymond, Winkler, Thomas, Feitosa, Mary F, Schwander, Karen, Bentley, Amy R, Brown, Michael R, Guo, Xiuqing, Manning, Alisa, Chasman, Daniel I, Aschard, Hugues, Bartz, Traci M, Bielak, Lawrence F, Campbell, Archie, Cheng, Ching-Yu, Dorajoo, Rajkumar, Hartwig, Fernando P, Horimoto, ARVR, Li, Changwei, Li-Gao, Ruifang, Liu, Yongmei, Marten, Jonathan, Musani, Solomon K, Ntalla, Ioanna, Rankinen, Tuomo, Richard, Melissa, Sim, Xueling, Smith, Albert V, Tajuddin, Salman M, Tayo, Bamidele O, Vojinovic, Dina, Warren, Helen R, Xuan, Deng, Alver, Maris, Boissel, Mathilde, Chai, Jin-Fang, Chen, Xu, Christensen, Kaare, Divers, Jasmin, Evangelou, Evangelos, Gao, Chuan, Girotto, Giorgia, Harris, Sarah E, He, Meian, Hsu, Fang-Chi, Kühnel, Brigitte, Laguzzi, Federica, Li, Xiaoyin, Lyytikäinen, Leo-Pekka, Nolte, Ilja M, Poveda, Alaitz, Rauramaa, Rainer, Riaz, Muhammad, Rueedi, Rico, Shu, Xiao-Ou, Snieder, Harold, Sofer, Tamar, Takeuchi, Fumihiko, Verweij, Niek, Ware, Erin B, Weiss, Stefan, Yanek, Lisa R, Amin, Najaf, Arking, Dan E, Arnett, Donna K, Bergmann, Sven, Boerwinkle, Eric, Brody, Jennifer A, Broeckel, Ulrich, Brumat, Marco, Burke, Gregory, Cabrera, Claudia P, Canouil, Mickaël, Chee, Miao Li, Chen, Yii-Der Ida, Cocca, Massimiliano, Connell, John, de Silva, H Janaka, de Vries, Paul S, Eiriksdottir, Gudny, Faul, Jessica D, Fisher, Virginia, Forrester, Terrence, Fox, Ervin F, Friedlander, Yechiel, Gao, He, Gigante, Bruna, Giulianini, Franco, Gu, Chi Charles, Gu, Dongfeng, Harris, Tamara B, He, Jiang, Heikkinen, Sami, Heng, Chew-Kiat, Hunt, Steven, Ikram, M Arfan, Irvin, Marguerite R, Kähönen, Mika, and Kavousi, Maryam

Subjects
Lifelines Cohort Study, Psychiatry, Biological Sciences, Medical and Health Sciences, Psychology and Cognitive Sciences
Abstract

Educational attainment is widely used as a surrogate for socioeconomic status (SES). Low SES is a risk factor for hypertension and high blood pressure (BP). To identify novel BP loci, we performed multi-ancestry meta-analyses accounting for gene-educational attainment interactions using two variables, "Some College" (yes/no) and "Graduated College" (yes/no). Interactions were evaluated using both a 1 degree of freedom (DF) interaction term and a 2DF joint test of genetic and interaction effects. Analyses were performed for systolic BP, diastolic BP, mean arterial pressure, and pulse pressure. We pursued genome-wide interrogation in Stage 1 studies (N = 117 438) and follow-up on promising variants in Stage 2 studies (N = 293 787) in five ancestry groups. Through combined meta-analyses of Stages 1 and 2, we identified 84 known and 18 novel BP loci at genome-wide significance level (P

Published
2021

4. Multiancestry Genome-Wide Association Study of Lipid Levels Incorporating Gene-Alcohol Interactions

Author

de Vries, Paul S, Brown, Michael R, Bentley, Amy R, Sung, Yun J, Winkler, Thomas W, Ntalla, Ioanna, Schwander, Karen, Kraja, Aldi T, Guo, Xiuqing, Franceschini, Nora, Cheng, Ching-Yu, Sim, Xueling, Vojinovic, Dina, Huffman, Jennifer E, Musani, Solomon K, Li, Changwei, Feitosa, Mary F, Richard, Melissa A, Noordam, Raymond, Aschard, Hugues, Bartz, Traci M, Bielak, Lawrence F, Deng, Xuan, Dorajoo, Rajkumar, Lohman, Kurt K, Manning, Alisa K, Rankinen, Tuomo, Smith, Albert V, Tajuddin, Salman M, Evangelou, Evangelos, Graff, Mariaelisa, Alver, Maris, Boissel, Mathilde, Chai, Jin Fang, Chen, Xu, Divers, Jasmin, Gandin, Ilaria, Gao, Chuan, Goel, Anuj, Hagemeijer, Yanick, Harris, Sarah E, Hartwig, Fernando P, He, Meian, Horimoto, Andrea RVR, Hsu, Fang-Chi, Jackson, Anne U, Kasturiratne, Anuradhani, Komulainen, Pirjo, Kühnel, Brigitte, Laguzzi, Federica, Lee, Joseph H, Luan, Jian'an, Lyytikäinen, Leo-Pekka, Matoba, Nana, Nolte, Ilja M, Pietzner, Maik, Riaz, Muhammad, Said, M Abdullah, Scott, Robert A, Sofer, Tamar, Stančáková, Alena, Takeuchi, Fumihiko, Tayo, Bamidele O, van der Most, Peter J, Varga, Tibor V, Wang, Yajuan, Ware, Erin B, Wen, Wanqing, Yanek, Lisa R, Zhang, Weihua, Zhao, Jing Hua, Afaq, Saima, Amin, Najaf, Amini, Marzyeh, Arking, Dan E, Aung, Tin, Ballantyne, Christie, Boerwinkle, Eric, Broeckel, Ulrich, Campbell, Archie, Canouil, Mickaël, Charumathi, Sabanayagam, Chen, Yii-Der Ida, Connell, John M, de Faire, Ulf, de las Fuentes, Lisa, de Mutsert, Renée, de Silva, H Janaka, Ding, Jingzhong, Dominiczak, Anna F, Duan, Qing, Eaton, Charles B, Eppinga, Ruben N, Faul, Jessica D, Fisher, Virginia, Forrester, Terrence, Franco, Oscar H, Friedlander, Yechiel, Ghanbari, Mohsen, and Giulianini, Franco

Subjects
Epidemiology, Health Sciences, Atherosclerosis, Substance Misuse, Human Genome, Alcoholism, Alcohol Use and Health, Genetics, 2.1 Biological and endogenous factors, Cardiovascular, Adolescent, Adult, Aged, Alcohol Drinking, Cholesterol, HDL, Cholesterol, LDL, Female, Genome-Wide Association Study, Genotype, Humans, Life Style, Lipids, Male, Middle Aged, Phenotype, Racial Groups, Triglycerides, Vascular Endothelial Growth Factor B, Young Adult, alcohol consumption, cholesterol, gene-environment interactions, gene-lifestyle interactions, genome-wide association studies, lipids, triglycerides, InterAct Consortium, Lifelines Cohort, Groningen, The Netherlands, Mathematical Sciences, Medical and Health Sciences
Abstract

A person's lipid profile is influenced by genetic variants and alcohol consumption, but the contribution of interactions between these exposures has not been studied. We therefore incorporated gene-alcohol interactions into a multiancestry genome-wide association study of levels of high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and triglycerides. We included 45 studies in stage 1 (genome-wide discovery) and 66 studies in stage 2 (focused follow-up), for a total of 394,584 individuals from 5 ancestry groups. Analyses covered the period July 2014-November 2017. Genetic main effects and interaction effects were jointly assessed by means of a 2-degrees-of-freedom (df) test, and a 1-df test was used to assess the interaction effects alone. Variants at 495 loci were at least suggestively associated (P < 1 × 10-6) with lipid levels in stage 1 and were evaluated in stage 2, followed by combined analyses of stage 1 and stage 2. In the combined analysis of stages 1 and 2, a total of 147 independent loci were associated with lipid levels at P < 5 × 10-8 using 2-df tests, of which 18 were novel. No genome-wide-significant associations were found testing the interaction effect alone. The novel loci included several genes (proprotein convertase subtilisin/kexin type 5 (PCSK5), vascular endothelial growth factor B (VEGFB), and apolipoprotein B mRNA editing enzyme, catalytic polypeptide 1 (APOBEC1) complementation factor (A1CF)) that have a putative role in lipid metabolism on the basis of existing evidence from cellular and experimental models.

Published
2019

5. Multi-ancestry study of blood lipid levels identifies four loci interacting with physical activity.

Author

Kilpeläinen, Tuomas O, Bentley, Amy R, Noordam, Raymond, Sung, Yun Ju, Schwander, Karen, Winkler, Thomas W, Jakupović, Hermina, Chasman, Daniel I, Manning, Alisa, Ntalla, Ioanna, Aschard, Hugues, Brown, Michael R, de Las Fuentes, Lisa, Franceschini, Nora, Guo, Xiuqing, Vojinovic, Dina, Aslibekyan, Stella, Feitosa, Mary F, Kho, Minjung, Musani, Solomon K, Richard, Melissa, Wang, Heming, Wang, Zhe, Bartz, Traci M, Bielak, Lawrence F, Campbell, Archie, Dorajoo, Rajkumar, Fisher, Virginia, Hartwig, Fernando P, Horimoto, Andrea RVR, Li, Changwei, Lohman, Kurt K, Marten, Jonathan, Sim, Xueling, Smith, Albert V, Tajuddin, Salman M, Alver, Maris, Amini, Marzyeh, Boissel, Mathilde, Chai, Jin Fang, Chen, Xu, Divers, Jasmin, Evangelou, Evangelos, Gao, Chuan, Graff, Mariaelisa, Harris, Sarah E, He, Meian, Hsu, Fang-Chi, Jackson, Anne U, Zhao, Jing Hua, Kraja, Aldi T, Kühnel, Brigitte, Laguzzi, Federica, Lyytikäinen, Leo-Pekka, Nolte, Ilja M, Rauramaa, Rainer, Riaz, Muhammad, Robino, Antonietta, Rueedi, Rico, Stringham, Heather M, Takeuchi, Fumihiko, van der Most, Peter J, Varga, Tibor V, Verweij, Niek, Ware, Erin B, Wen, Wanqing, Li, Xiaoyin, Yanek, Lisa R, Amin, Najaf, Arnett, Donna K, Boerwinkle, Eric, Brumat, Marco, Cade, Brian, Canouil, Mickaël, Chen, Yii-Der Ida, Concas, Maria Pina, Connell, John, de Mutsert, Renée, de Silva, H Janaka, de Vries, Paul S, Demirkan, Ayşe, Ding, Jingzhong, Eaton, Charles B, Faul, Jessica D, Friedlander, Yechiel, Gabriel, Kelley P, Ghanbari, Mohsen, Giulianini, Franco, Gu, Chi Charles, Gu, Dongfeng, Harris, Tamara B, He, Jiang, Heikkinen, Sami, Heng, Chew-Kiat, Hunt, Steven C, Ikram, M Arfan, Jonas, Jost B, Koh, Woon-Puay, Komulainen, Pirjo, and Krieger, Jose E

Subjects
Lifelines Cohort Study, Humans, Cholesterol, Lipids, Triglycerides, Calcium-Binding Proteins, Muscle Proteins, Microtubule-Associated Proteins, Membrane Proteins, Nerve Tissue Proteins, Transcription Factors, Exercise, Genotype, Adolescent, Adult, Aged, Aged, 80 and over, Middle Aged, African Continental Ancestry Group, Asian Continental Ancestry Group, European Continental Ancestry Group, Hispanic Americans, Brazil, Female, Male, Lipid Metabolism, Cholesterol, LDL, Cholesterol, HDL, Genome-Wide Association Study, Young Adult, Genetic Loci, LIM-Homeodomain Proteins, and over, HDL, LDL
Abstract

Many genetic loci affect circulating lipid levels, but it remains unknown whether lifestyle factors, such as physical activity, modify these genetic effects. To identify lipid loci interacting with physical activity, we performed genome-wide analyses of circulating HDL cholesterol, LDL cholesterol, and triglyceride levels in up to 120,979 individuals of European, African, Asian, Hispanic, and Brazilian ancestry, with follow-up of suggestive associations in an additional 131,012 individuals. We find four loci, in/near CLASP1, LHX1, SNTA1, and CNTNAP2, that are associated with circulating lipid levels through interaction with physical activity; higher levels of physical activity enhance the HDL cholesterol-increasing effects of the CLASP1, LHX1, and SNTA1 loci and attenuate the LDL cholesterol-increasing effect of the CNTNAP2 locus. The CLASP1, LHX1, and SNTA1 regions harbor genes linked to muscle function and lipid metabolism. Our results elucidate the role of physical activity interactions in the genetic contribution to blood lipid levels.

Published
2019

6. A Genome-Wide Association Study of Diabetic Kidney Disease in Subjects With Type 2 Diabetes

Author

van Zuydam, Natalie R, Ahlqvist, Emma, Sandholm, Niina, Deshmukh, Harshal, Rayner, N William, Abdalla, Moustafa, Ladenvall, Claes, Ziemek, Daniel, Fauman, Eric, Robertson, Neil R, McKeigue, Paul M, Valo, Erkka, Forsblom, Carol, Harjutsalo, Valma, Perna, Annalisa, Rurali, Erica, Marcovecchio, M Loredana, Igo, Robert P, Salem, Rany M, Perico, Norberto, Lajer, Maria, Käräjämäki, Annemari, Imamura, Minako, Kubo, Michiaki, Takahashi, Atsushi, Sim, Xueling, Liu, Jianjun, van Dam, Rob M, Jiang, Guozhi, Tam, Claudia HT, Luk, Andrea OY, Lee, Heung Man, Lim, Cadmon KP, Szeto, Cheuk Chun, So, Wing Yee, Chan, Juliana CN, Ang, Su Fen, Dorajoo, Rajkumar, Wang, Ling, Clara, Tan Si Hua, McKnight, Amy-Jayne, Duffy, Seamus, Pezzolesi, Marcus G, Marre, Michel, Gyorgy, Beata, Hadjadj, Samy, Hiraki, Linda T, Ahluwalia, Tarunveer S, Almgren, Peter, Schulz, Christina-Alexandra, Orho-Melander, Marju, Linneberg, Allan, Christensen, Cramer, Witte, Daniel R, Grarup, Niels, Brandslund, Ivan, Melander, Olle, Paterson, Andrew D, Tregouet, David, Maxwell, Alexander P, Lim, Su Chi, Ma, Ronald CW, Tai, E Shyong, Maeda, Shiro, Lyssenko, Valeriya, Tuomi, Tiinamaija, Krolewski, Andrzej S, Rich, Stephen S, Hirschhorn, Joel N, Florez, Jose C, Dunger, David, Pedersen, Oluf, Hansen, Torben, Rossing, Peter, Remuzzi, Giuseppe, Brosnan, Mary Julia, Palmer, Colin NA, Groop, Per-Henrik, Colhoun, Helen M, Groop, Leif C, McCarthy, Mark I, Koivula, S, Uggeldahl, T, Forslund, T, Halonen, A, Koistinen, A, Koskiaho, P, Laukkanen, M, Saltevo, J, Tiihonen, M, Forsen, M, Granlund, H, Jonsson, A-C, Nyroos, B, Kinnunen, P, Orvola, A, Salonen, T, Vähänen, A, Paldanius, Kotka R, and Riihelä, M

Subjects
Diabetes, Genetics, Human Genome, Aetiology, 2.1 Biological and endogenous factors, Metabolic and endocrine, Good Health and Well Being, Adult, Aged, Aged, 80 and over, Case-Control Studies, Diabetes Mellitus, Type 2, Diabetic Nephropathies, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, Humans, Kidney Failure, Chronic, Male, Middle Aged, Polymorphism, Single Nucleotide, Renal Insufficiency, Chronic, Finnish Diabetic Nephropathy Study, Hong Kong Diabetes Registry Theme-based Research Scheme Project Group, Warren 3 and Genetics of Kidneys in Diabetes (GoKinD) Study Group, GENIE (GEnetics of Nephropathy an International Effort) Consortium, Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) Research Group, SUrrogate markers for Micro- and Macrovascular hard endpoints for Innovative diabetes Tools (SUMMIT) Consortium, Medical and Health Sciences, Endocrinology & Metabolism
Abstract

Identification of sequence variants robustly associated with predisposition to diabetic kidney disease (DKD) has the potential to provide insights into the pathophysiological mechanisms responsible. We conducted a genome-wide association study (GWAS) of DKD in type 2 diabetes (T2D) using eight complementary dichotomous and quantitative DKD phenotypes: the principal dichotomous analysis involved 5,717 T2D subjects, 3,345 with DKD. Promising association signals were evaluated in up to 26,827 subjects with T2D (12,710 with DKD). A combined T1D+T2D GWAS was performed using complementary data available for subjects with T1D, which, with replication samples, involved up to 40,340 subjects with diabetes (18,582 with DKD). Analysis of specific DKD phenotypes identified a novel signal near GABRR1 (rs9942471, P = 4.5 × 10-8) associated with microalbuminuria in European T2D case subjects. However, no replication of this signal was observed in Asian subjects with T2D or in the equivalent T1D analysis. There was only limited support, in this substantially enlarged analysis, for association at previously reported DKD signals, except for those at UMOD and PRKAG2, both associated with estimated glomerular filtration rate. We conclude that, despite challenges in addressing phenotypic heterogeneity, access to increased sample sizes will continue to provide more robust inference regarding risk variant discovery for DKD.

Published
2018

7. Novel genetic associations for blood pressure identified via gene-alcohol interaction in up to 570K individuals across multiple ancestries.

Author

Feitosa, Mary F, Kraja, Aldi T, Chasman, Daniel I, Sung, Yun J, Winkler, Thomas W, Ntalla, Ioanna, Guo, Xiuqing, Franceschini, Nora, Cheng, Ching-Yu, Sim, Xueling, Vojinovic, Dina, Marten, Jonathan, Musani, Solomon K, Li, Changwei, Bentley, Amy R, Brown, Michael R, Schwander, Karen, Richard, Melissa A, Noordam, Raymond, Aschard, Hugues, Bartz, Traci M, Bielak, Lawrence F, Dorajoo, Rajkumar, Fisher, Virginia, Hartwig, Fernando P, Horimoto, Andrea RVR, Lohman, Kurt K, Manning, Alisa K, Rankinen, Tuomo, Smith, Albert V, Tajuddin, Salman M, Wojczynski, Mary K, Alver, Maris, Boissel, Mathilde, Cai, Qiuyin, Campbell, Archie, Chai, Jin Fang, Chen, Xu, Divers, Jasmin, Gao, Chuan, Goel, Anuj, Hagemeijer, Yanick, Harris, Sarah E, He, Meian, Hsu, Fang-Chi, Jackson, Anne U, Kähönen, Mika, Kasturiratne, Anuradhani, Komulainen, Pirjo, Kühnel, Brigitte, Laguzzi, Federica, Luan, Jian'an, Matoba, Nana, Nolte, Ilja M, Padmanabhan, Sandosh, Riaz, Muhammad, Rueedi, Rico, Robino, Antonietta, Said, M Abdullah, Scott, Robert A, Sofer, Tamar, Stančáková, Alena, Takeuchi, Fumihiko, Tayo, Bamidele O, van der Most, Peter J, Varga, Tibor V, Vitart, Veronique, Wang, Yajuan, Ware, Erin B, Warren, Helen R, Weiss, Stefan, Wen, Wanqing, Yanek, Lisa R, Zhang, Weihua, Zhao, Jing Hua, Afaq, Saima, Amin, Najaf, Amini, Marzyeh, Arking, Dan E, Aung, Tin, Boerwinkle, Eric, Borecki, Ingrid, Broeckel, Ulrich, Brown, Morris, Brumat, Marco, Burke, Gregory L, Canouil, Mickaël, Chakravarti, Aravinda, Charumathi, Sabanayagam, Ida Chen, Yii-Der, Connell, John M, Correa, Adolfo, de Las Fuentes, Lisa, de Mutsert, Renée, de Silva, H Janaka, Deng, Xuan, Ding, Jingzhong, Duan, Qing, Eaton, Charles B, and Ehret, Georg

Subjects
InterAct Consortium, Humans, Hypertension, Genetic Predisposition to Disease, Cohort Studies, Pedigree, Alcohol Drinking, Blood Pressure, Polymorphism, Single Nucleotide, Adolescent, Adult, Aged, Aged, 80 and over, Middle Aged, Continental Population Groups, Female, Male, Genome-Wide Association Study, Young Adult, Gene-Environment Interaction, General Science & Technology
Abstract

Heavy alcohol consumption is an established risk factor for hypertension; the mechanism by which alcohol consumption impact blood pressure (BP) regulation remains unknown. We hypothesized that a genome-wide association study accounting for gene-alcohol consumption interaction for BP might identify additional BP loci and contribute to the understanding of alcohol-related BP regulation. We conducted a large two-stage investigation incorporating joint testing of main genetic effects and single nucleotide variant (SNV)-alcohol consumption interactions. In Stage 1, genome-wide discovery meta-analyses in ≈131K individuals across several ancestry groups yielded 3,514 SNVs (245 loci) with suggestive evidence of association (P < 1.0 x 10-5). In Stage 2, these SNVs were tested for independent external replication in ≈440K individuals across multiple ancestries. We identified and replicated (at Bonferroni correction threshold) five novel BP loci (380 SNVs in 21 genes) and 49 previously reported BP loci (2,159 SNVs in 109 genes) in European ancestry, and in multi-ancestry meta-analyses (P < 5.0 x 10-8). For African ancestry samples, we detected 18 potentially novel BP loci (P < 5.0 x 10-8) in Stage 1 that warrant further replication. Additionally, correlated meta-analysis identified eight novel BP loci (11 genes). Several genes in these loci (e.g., PINX1, GATA4, BLK, FTO and GABBR2) have been previously reported to be associated with alcohol consumption. These findings provide insights into the role of alcohol consumption in the genetic architecture of hypertension.

Published
2018

8. Genetically Determined Plasma Lipid Levels and Risk of Diabetic Retinopathy: A Mendelian Randomization Study

Author

Sobrin, Lucia, Chong, Yong He, Fan, Qiao, Gan, Alfred, Stanwyck, Lynn K, Kaidonis, Georgia, Craig, Jamie E, Kim, Jihye, Liao, Wen-Ling, Huang, Yu-Chuen, Lee, Wen-Jane, Hung, Yi-Jen, Guo, Xiuqing, Hai, Yang, Ipp, Eli, Pollack, Samuela, Hancock, Heather, Price, Alkes, Penman, Alan, Mitchell, Paul, Liew, Gerald, Smith, Albert V, Gudnason, Vilmundur, Tan, Gavin, Klein, Barbara EK, Kuo, Jane, Li, Xiaohui, Christiansen, Mark W, Psaty, Bruce M, Sandow, Kevin, Jensen, Richard A, Klein, Ronald, Cotch, Mary Frances, Wang, Jie Jin, Jia, Yucheng, Chen, Ching J, Chen, Yii-Der Ida, Rotter, Jerome I, Tsai, Fuu-Jen, Hanis, Craig L, Burdon, Kathryn P, Wong, Tien Yin, Cheng, Ching-Yu, Spracklen, Cassandra N, Chen, Peng, Kim, Young Jin, Wang, Xu, Cai, Hui, Li, Shengxu, Long, Jirong, Wu, Ying, Wang, Ya-Xing, Takeuchi, Fumihiko, Wu, Jer-Yuarn, Jung, Keum-Ji, Hu, Cheng, Akiyama, Koichi, Zhang, Yonghong, Moon, Sanghoon, Johnson, Todd A, Li, Huaixing, Dorajoo, Rajkumar, He, Meian, Cannon, Maren E, Roman, Tamara S, Salfati, Elias, Lin, Keng-Hung, Sheu, Wayne HH, Absher, Devin, Adair, Linda S, Assimes, Themistocles L, Aung, Tin, Cai, Qiuyin, Chang, Li-Ching, Chen, Chien-Hsiun, Chien, Li-Hsin, Chuang, Lee-Ming, Chuang, Shu-Chun, Du, Shufa, Fann, Cathy SJ, Feranil, Alan B, Friedlander, Yechiel, Gordon-Larsen, Penny, Gu, Dongfeng, Gui, Lixuan, Guo, Zhirong, Heng, Chew-Kiat, Hixson, James, Hou, Xuhong, Hsiung, Chao Agnes, Hu, Yao, Hwang, Mi Yeong, Hwu, Chii-Min, Isono, Masato, Juang, Jyh-Ming Jimmy, Khor, Chiea-Chuen, Kim, Yun Kyoung, Koh, Woon-Puay, Kubo, Michiaki, and Lee, I-Te

Subjects
Biomedical and Clinical Sciences, Genetics, 2.1 Biological and endogenous factors, Metabolic and endocrine, Aged, Diabetic Retinopathy, Female, Genome-Wide Association Study, Humans, Lipids, Male, Mendelian Randomization Analysis, Middle Aged, Polymorphism, Single Nucleotide, Risk, Asian Genetic Epidemiology Network Consortium, Medical and Health Sciences, Endocrinology & Metabolism, Biomedical and clinical sciences
Abstract

Results from observational studies examining dyslipidemia as a risk factor for diabetic retinopathy (DR) have been inconsistent. We evaluated the causal relationship between plasma lipids and DR using a Mendelian randomization approach. We pooled genome-wide association studies summary statistics from 18 studies for two DR phenotypes: any DR (N = 2,969 case and 4,096 control subjects) and severe DR (N = 1,277 case and 3,980 control subjects). Previously identified lipid-associated single nucleotide polymorphisms served as instrumental variables. Meta-analysis to combine the Mendelian randomization estimates from different cohorts was conducted. There was no statistically significant change in odds ratios of having any DR or severe DR for any of the lipid fractions in the primary analysis that used single nucleotide polymorphisms that did not have a pleiotropic effect on another lipid fraction. Similarly, there was no significant association in the Caucasian and Chinese subgroup analyses. This study did not show evidence of a causal role of the four lipid fractions on DR. However, the study had limited power to detect odds ratios less than 1.23 per SD in genetically induced increase in plasma lipid levels, thus we cannot exclude that causal relationships with more modest effect sizes exist.

Published
2017

9. Association analyses of East Asian individuals and trans-ancestry analyses with European individuals reveal new loci associated with cholesterol and triglyceride levels

Author

Spracklen, Cassandra N, Chen, Peng, Kim, Young Jin, Wang, Xu, Cai, Hui, Li, Shengxu, Long, Jirong, Wu, Ying, Wang, Ya Xing, Takeuchi, Fumihiko, Wu, Jer-Yuarn, Jung, Keum-Ji, Hu, Cheng, Akiyama, Koichi, Zhang, Yonghong, Moon, Sanghoon, Johnson, Todd A, Li, Huaixing, Dorajoo, Rajkumar, He, Meian, Cannon, Maren E, Roman, Tamara S, Salfati, Elias, Lin, Keng-Hung, Guo, Xiuqing, Sheu, Wayne HH, Absher, Devin, Adair, Linda S, Assimes, Themistocles L, Aung, Tin, Cai, Qiuyin, Chang, Li-Ching, Chen, Chien-Hsiun, Chien, Li-Hsin, Chuang, Lee-Ming, Chuang, Shu-Chun, Du, Shufa, Fan, Qiao, Fann, Cathy SJ, Feranil, Alan B, Friedlander, Yechiel, Gordon-Larsen, Penny, Gu, Dongfeng, Gui, Lixuan, Guo, Zhirong, Heng, Chew-Kiat, Hixson, James, Hou, Xuhong, Hsiung, Chao Agnes, Hu, Yao, Hwang, Mi Yeong, Hwu, Chii-Min, Isono, Masato, Juang, Jyh-Ming Jimmy, Khor, Chiea-Chuen, Kim, Yun Kyoung, Koh, Woon-Puay, Kubo, Michiaki, Lee, I-Te, Lee, Sun-Ju, Lee, Wen-Jane, Liang, Kae-Woei, Lim, Blanche, Lim, Sing-Hui, Liu, Jianjun, Nabika, Toru, Pan, Wen-Harn, Peng, Hao, Quertermous, Thomas, Sabanayagam, Charumathi, Sandow, Kevin, Shi, Jinxiu, Sun, Liang, Tan, Pok Chien, Tan, Shu-Pei, Taylor, Kent D, Teo, Yik-Ying, Toh, Sue-Anne, Tsunoda, Tatsuhiko, van Dam, Rob M, Wang, Aili, Wang, Feijie, Wang, Jie, Bin Wei, Wen, Xiang, Yong-Bing, Yao, Jie, Yuan, Jian-Min, Zhang, Rong, Zhao, Wanting, Chen, Yii-Der Ida, Rich, Stephen S, Rotter, Jerome I, Wang, Tzung-Dau, Wu, Tangchun, Lin, Xu, Han, Bok-Ghee, Tanaka, Toshihiro, Cho, Yoon Shin, Katsuya, Tomohiro, and Jia, Weiping

Subjects
Biological Sciences, Genetics, Women's Health, Atherosclerosis, Human Genome, Cardiovascular, Metabolic and endocrine, Stroke, Adult, Alleles, Asian People, Cholesterol, Ethnicity, Female, Gene Frequency, Genetic Association Studies, Genome-Wide Association Study, Humans, Linkage Disequilibrium, Lipids, Lipoproteins, HDL, Lipoproteins, LDL, Male, Middle Aged, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Triglycerides, White People, Medical and Health Sciences, Genetics & Heredity
Abstract

Large-scale meta-analyses of genome-wide association studies (GWAS) have identified >175 loci associated with fasting cholesterol levels, including total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), and triglycerides (TG). With differences in linkage disequilibrium (LD) structure and allele frequencies between ancestry groups, studies in additional large samples may detect new associations. We conducted staged GWAS meta-analyses in up to 69,414 East Asian individuals from 24 studies with participants from Japan, the Philippines, Korea, China, Singapore, and Taiwan. These meta-analyses identified (P

Published
2017

10. Genome-Wide Association Study Meta-Analysis of Long-Term Average Blood Pressure in East Asians

Author

Li, Changwei, Kim, Yun Kyoung, Dorajoo, Rajkumar, Li, Huaixing, Lee, I-Te, Cheng, Ching-Yu, He, Meian, Sheu, Wayne H-H, Guo, Xiuqing, Ganesh, Santhi K, He, Jiang, Lee, Juyoung, Liu, Jianjun, Hu, Yao, Rao, Dabeeru C, Tsai, Fuu-Jen, Koh, Jia Yu, Hu, Hua, Liang, Kae-Woei, Palmas, Walter, Hixson, James E, Han, Sohee, Teo, Yik-Ying, Wang, Yiqin, Chen, Jing, Lu, Chieh Hsiang, Zheng, Yingfeng, Gui, Lixuan, Lee, Wen-Jane, Yao, Jie, Gu, Dongfeng, Han, Bok-Ghee, Sim, Xueling, Sun, Liang, Zhao, Jinying, Chen, Chien-Hsiun, Kumari, Neelam, He, Yunfeng, Taylor, Kent D, Raffel, Leslie J, Moon, Sanghoon, Rotter, Jerome I, Ida Chen, Yii-der, Wu, Tangchun, Wong, Tien Yin, Wu, Jer-Yuarn, Lin, Xu, Tai, E-Shyong, Kim, Bong-Jo, and Kelly, Tanika N

Subjects
Biomedical and Clinical Sciences, Cardiovascular Medicine and Haematology, Genetics, Human Genome, 2.1 Biological and endogenous factors, Cardiovascular, Asian People, Blood Pressure, Asia, Eastern, Female, Genetic Loci, Genome-Wide Association Study, Humans, Male, Phenotype, Polymorphism, Single Nucleotide, arterial pressure, blood pressure, epidemiology, genome-wide association study, Medical Biotechnology, Cardiorespiratory Medicine and Haematology, Cardiovascular System & Hematology, Cardiovascular medicine and haematology
Abstract

BackgroundGenome-wide single marker and gene-based meta-analyses of long-term average (LTA) blood pressure (BP) phenotypes may reveal novel findings for BP.Methods and resultsWe conducted genome-wide analysis among 18 422 East Asian participants (stage 1) followed by replication study of ≤46 629 participants of European ancestry (stage 2). Significant single-nucleotide polymorphisms and genes were determined by a P

Published
2017

11. Genome-wide association studies in East Asians identify new loci for waist-hip ratio and waist circumference.

Author

Wen, Wanqing, Kato, Norihiro, Hwang, Joo-Yeon, Guo, Xingyi, Tabara, Yasuharu, Li, Huaixing, Dorajoo, Rajkumar, Yang, Xiaobo, Tsai, Fuu-Jen, Li, Shengxu, Wu, Ying, Wu, Tangchun, Kim, Soriul, Guo, Xiuqing, Liang, Jun, Shungin, Dmitry, Adair, Linda S, Akiyama, Koichi, Allison, Matthew, Cai, Qiuyin, Chang, Li-Ching, Chen, Chien-Hsiun, Chen, Yuan-Tsong, Cho, Yoon Shin, Choi, Bo Youl, Gao, Yutang, Go, Min Jin, Gu, Dongfeng, Han, Bok-Ghee, He, Meian, Hixson, James E, Hu, Yanling, Huang, Tao, Isono, Masato, Jung, Keum Ji, Kang, Daehee, Kim, Young Jin, Kita, Yoshikuni, Lee, Juyoung, Lee, Nanette R, Lee, Jeannette, Wang, Yiqin, Liu, Jian-Jun, Long, Jirong, Moon, Sanghoon, Nakamura, Yasuyuki, Nakatochi, Masahiro, Ohnaka, Keizo, Rao, Dabeeru, Shi, Jiajun, Sull, Jae Woong, Tan, Aihua, Ueshima, Hirotsugu, Wu, Chen, Xiang, Yong-Bing, Yamamoto, Ken, Yao, Jie, Ye, Xingwang, Yokota, Mitsuhiro, Zhang, Xiaomin, Zheng, Yan, Qi, Lu, Rotter, Jerome I, Jee, Sun Ha, Lin, Dongxin, Mohlke, Karen L, He, Jiang, Mo, Zengnan, Wu, Jer-Yuarn, Tai, E Shyong, Lin, Xu, Miki, Tetsuro, Kim, Bong-Jo, Takeuchi, Fumihiko, Zheng, Wei, and Shu, Xiao-Ou

Subjects
Humans, Obesity, Genetic Predisposition to Disease, Waist-Hip Ratio, Sex Factors, Quantitative Trait, Heritable, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Asian Continental Ancestry Group, Asia, Female, Male, Waist Circumference, Genome-Wide Association Study, Quantitative Trait, Heritable, Polymorphism, Single Nucleotide, Clinical Research, Genetics, 2.1 Biological and endogenous factors, Cardiovascular, Biochemistry and Cell Biology, Other Physical Sciences
Abstract

Sixty genetic loci associated with abdominal obesity, measured by waist circumference (WC) and waist-hip ratio (WHR), have been previously identified, primarily from studies conducted in European-ancestry populations. We conducted a meta-analysis of associations of abdominal obesity with approximately 2.5 million single nucleotide polymorphisms (SNPs) among 53,052 (for WC) and 48,312 (for WHR) individuals of Asian descent, and replicated 33 selected SNPs among 3,762 to 17,110 additional individuals. We identified four novel loci near the EFEMP1, ADAMTSL3 , CNPY2, and GNAS genes that were associated with WC after adjustment for body mass index (BMI); two loci near the NID2 and HLA-DRB5 genes associated with WHR after adjustment for BMI, and three loci near the CEP120, TSC22D2, and SLC22A2 genes associated with WC without adjustment for BMI. Functional enrichment analyses revealed enrichment of corticotropin-releasing hormone signaling, GNRH signaling, and/or CDK5 signaling pathways for those newly-identified loci. Our study provides additional insight on genetic contribution to abdominal obesity.

Published
2016

12. Meta-analysis of genome-wide association studies in East Asian-ancestry populations identifies four new loci for body mass index

Author

Wen, Wanqing, Zheng, Wei, Okada, Yukinori, Takeuchi, Fumihiko, Tabara, Yasuharu, Hwang, Joo-Yeon, Dorajoo, Rajkumar, Li, Huaixing, Tsai, Fuu-Jen, Yang, Xiaobo, He, Jiang, Wu, Ying, He, Meian, Zhang, Yi, Liang, Jun, Guo, Xiuqing, Sheu, Wayne Huey-Herng, Delahanty, Ryan, Guo, Xingyi, Kubo, Michiaki, Yamamoto, Ken, Ohkubo, Takayoshi, Go, Min Jin, Liu, Jian Jun, Gan, Wei, Chen, Ching-Chu, Gao, Yong, Li, Shengxu, Lee, Nanette R, Wu, Chen, Zhou, Xueya, Song, Huaidong, Yao, Jie, Lee, I-Te, Long, Jirong, Tsunoda, Tatsuhiko, Akiyama, Koichi, Takashima, Naoyuki, Cho, Yoon Shin, Ong, Rick TH, Lu, Ling, Chen, Chien-Hsiun, Tan, Aihua, Rice, Treva K, Adair, Linda S, Gui, Lixuan, Allison, Matthew, Lee, Wen-Jane, Cai, Qiuyin, Isomura, Minoru, Umemura, Satoshi, Kim, Young Jin, Seielstad, Mark, Hixson, James, Xiang, Yong-Bing, Isono, Masato, Kim, Bong-Jo, Sim, Xueling, Lu, Wei, Nabika, Toru, Lee, Juyoung, Lim, Wei-Yen, Gao, Yu-Tang, Takayanagi, Ryoichi, Kang, Dae-Hee, Wong, Tien Yin, Hsiung, Chao Agnes, Wu, I-Chien, Juang, Jyh-Ming Jimmy, Shi, Jiajun, Choi, Bo Youl, Aung, Tin, Hu, Frank, Kim, Mi Kyung, Lim, Wei Yen, Wang, Tzung-Dao, Shin, Min-Ho, Lee, Jeannette, Ji, Bu-Tian, Lee, Young-Hoon, Young, Terri L, Shin, Dong Hoon, Chun, Byung-Yeol, Cho, Myeong-Chan, Han, Bok-Ghee, Hwu, Chii-Min, Assimes, Themistocles L, Absher, Devin, Yan, Xiaofei, Kim, Eric, Kuo, Jane Z, Kwon, Soonil, Taylor, Kent D, Chen, Yii-Der I, Rotter, Jerome I, Qi, Lu, Zhu, Dingliang, Wu, Tangchun, Mohlke, Karen L, and Gu, Dongfeng

Subjects
Biological Sciences, Genetics, Obesity, Human Genome, Nutrition, Women's Health, 1.1 Normal biological development and functioning, Stroke, 5'-Nucleotidase, Aldehyde Dehydrogenase, Aldehyde Dehydrogenase, Mitochondrial, Asian People, Blood Proteins, Body Mass Index, Cardiac Myosins, Asia, Eastern, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, Glycoproteins, Humans, KCNQ1 Potassium Channel, Male, Myosin Light Chains, Polymorphism, Single Nucleotide, Proteinase Inhibitory Proteins, Secretory, Medical and Health Sciences, Genetics & Heredity
Abstract

Recent genetic association studies have identified 55 genetic loci associated with obesity or body mass index (BMI). The vast majority, 51 loci, however, were identified in European-ancestry populations. We conducted a meta-analysis of associations between BMI and ∼2.5 million genotyped or imputed single nucleotide polymorphisms among 86 757 individuals of Asian ancestry, followed by in silico and de novo replication among 7488-47 352 additional Asian-ancestry individuals. We identified four novel BMI-associated loci near the KCNQ1 (rs2237892, P = 9.29 × 10(-13)), ALDH2/MYL2 (rs671, P = 3.40 × 10(-11); rs12229654, P = 4.56 × 10(-9)), ITIH4 (rs2535633, P = 1.77 × 10(-10)) and NT5C2 (rs11191580, P = 3.83 × 10(-8)) genes. The association of BMI with rs2237892, rs671 and rs12229654 was significantly stronger among men than among women. Of the 51 BMI-associated loci initially identified in European-ancestry populations, we confirmed eight loci at the genome-wide significance level (P < 5.0 × 10(-8)) and an additional 14 at P < 1.0 × 10(-3) with the same direction of effect as reported previously. Findings from this analysis expand our knowledge of the genetic basis of obesity.

Published
2014

13. Low copy number of the salivary amylase gene predisposes to obesity

Author

Falchi, Mario, El-Sayed Moustafa, Julia Sarah, Takousis, Petros, Pesce, Francesco, Bonnefond, Amélie, Andersson-Assarsson, Johanna C, Sudmant, Peter H, Dorajoo, Rajkumar, Al-Shafai, Mashael Nedham, Bottolo, Leonardo, Ozdemir, Erdal, So, Hon-Cheong, Davies, Robert W, Patrice, Alexandre, Dent, Robert, Mangino, Massimo, Hysi, Pirro G, Dechaume, Aurélie, Huyvaert, Marlène, Skinner, Jane, Pigeyre, Marie, Caiazzo, Robert, Raverdy, Violeta, Vaillant, Emmanuel, Field, Sarah, Balkau, Beverley, Marre, Michel, Visvikis-Siest, Sophie, Weill, Jacques, Poulain-Godefroy, Odile, Jacobson, Peter, Sjostrom, Lars, Hammond, Christopher J, Deloukas, Panos, Sham, Pak Chung, McPherson, Ruth, Lee, Jeannette, Tai, E Shyong, Sladek, Robert, Carlsson, Lena MS, Walley, Andrew, Eichler, Evan E, Pattou, Francois, Spector, Timothy D, and Froguel, Philippe

Subjects
Biological Sciences, Genetics, Cancer, Body Mass Index, Carbohydrate Metabolism, Gene Dosage, Genetic Predisposition to Disease, Genomics, Humans, Microarray Analysis, Obesity, Odds Ratio, Salivary alpha-Amylases, Medical and Health Sciences, Developmental Biology, Agricultural biotechnology, Bioinformatics and computational biology
Abstract

Common multi-allelic copy number variants (CNVs) appear enriched for phenotypic associations compared to their biallelic counterparts. Here we investigated the influence of gene dosage effects on adiposity through a CNV association study of gene expression levels in adipose tissue. We identified significant association of a multi-allelic CNV encompassing the salivary amylase gene (AMY1) with body mass index (BMI) and obesity, and we replicated this finding in 6,200 subjects. Increased AMY1 copy number was positively associated with both amylase gene expression (P = 2.31 × 10(-14)) and serum enzyme levels (P < 2.20 × 10(-16)), whereas reduced AMY1 copy number was associated with increased BMI (change in BMI per estimated copy = -0.15 (0.02) kg/m(2); P = 6.93 × 10(-10)) and obesity risk (odds ratio (OR) per estimated copy = 1.19, 95% confidence interval (CI) = 1.13-1.26; P = 1.46 × 10(-10)). The OR value of 1.19 per copy of AMY1 translates into about an eightfold difference in risk of obesity between subjects in the top (copy number > 9) and bottom (copy number < 4) 10% of the copy number distribution. Our study provides a first genetic link between carbohydrate metabolism and BMI and demonstrates the power of integrated genomic approaches beyond genome-wide association studies.

Published
2014

14. FTO Variants Are Associated With Obesity in the Chinese and Malay Populations in Singapore

Author

Tan, Jonathan T, Dorajoo, Rajkumar, Seielstad, Mark, Sim, Xue Ling, Ong, Rick Twee-Hee, Chia, Kee Seng, Wong, Tien Yin, Saw, Seang Mei, Chew, Suok Kai, Aung, Tin, and Tai, E-Shyong

Subjects
Biomedical and Clinical Sciences, Diabetes, Nutrition, Prevention, Obesity, Genetics, Aetiology, 2.1 Biological and endogenous factors, Stroke, Metabolic and endocrine, Alpha-Ketoglutarate-Dependent Dioxygenase FTO, Asian People, Body Mass Index, Diabetes Mellitus, Type 2, Gene Frequency, Genotype, Humans, Linkage Disequilibrium, Odds Ratio, Polymorphism, Single Nucleotide, Proteins, Singapore, Medical and Health Sciences, Endocrinology & Metabolism, Biomedical and clinical sciences
Abstract

ObjectiveAssociation between genetic variants at the FTO locus and obesity has been consistently observed in populations of European ancestry and inconsistently in non-Europeans. The aim of this study was to examine the effects of FTO variants on obesity and type 2 diabetes in Southeast Asian populations.Research design and methodsWe examined associations between nine previously reported FTO single nucleotide polymorphisms (SNPs) with obesity, type 2 diabetes, and related traits in 4,298 participants (2,919 Chinese, 785 Malays, and 594 Asian Indians) from the 1998 Singapore National Health Survey (NHS98) and 2,996 Malays from the Singapore Malay Eye Study (SiMES).ResultsAll nine SNPs exhibited strong linkage disequilibrium (r(2) = 0.6-0.99), and minor alleles were associated with obesity in the same direction as previous studies with effect sizes ranging from 0.42 to 0.68 kg/m(2) (P < 0.0001) in NHS98 Chinese, 0.65 to 0.91 kg/m(2) (P < 0.02) in NHS98 Malays, and 0.52 to 0.64 kg/m(2) (P < 0.0001) in SiMES Malays after adjustment for age, sex, smoking, alcohol consumption, and exercise. The variants were also associated with type 2 diabetes, though not after adjustment for BMI (with the exception of the SiMES Malays: odds ratio 1.17-1.22; P ConclusionsFTO variants common among European populations are associated with obesity in ethnic Chinese and Malays in Singapore. Our data do not support the hypothesis that differences in allele frequency or genetic architecture underlie the lack of association observed in some populations of Asian ancestry. Examination of gene-environment interactions involving variants at this locus may provide further insights into the role of FTO in the pathogenesis of human obesity and diabetes.

Published
2008

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