TY - JOUR
T1 - Genetic determinants of the ankle-brachial index
T2 - A meta-analysis of a cardiovascular candidate gene 50K SNP panel in the candidate gene association resource (CARe) consortium
AU - Wassel, Christina L.
AU - Lamina, Claudia
AU - Nambi, Vijay
AU - Coassin, Stefan
AU - Mukamal, Kenneth J.
AU - Ganesh, Santhi K.
AU - Jacobs, David R.
AU - Franceschini, Nora
AU - Papanicolaou, George J.
AU - Gibson, Quince
AU - Yanek, Lisa R.
AU - van der Harst, Pim
AU - Ferguson, Jane F.
AU - Crawford, Dana C.
AU - Waite, Lindsay L.
AU - Allison, Matthew A.
AU - Criqui, Michael H.
AU - McDermott, Mary M.
AU - Mehra, Reena
AU - Cupples, L. Adrienne
AU - Hwang, Shih-Jen
AU - Redline, Susan
AU - Kaplan, Robert C.
AU - Heiss, Gerardo
AU - Rotter, Jerome I.
AU - Boerwinkle, Eric
AU - Taylor, Herman A.
AU - Eraso, Luis H.
AU - Haun, Margot
AU - Li, Mingyao
AU - Meisinger, Christa
AU - O'Connell, Jeffrey R.
AU - Shuldineri, Alan R.
AU - Tybjaerg-Hansen, Anne
AU - Frikke-Schmidt, Ruth
AU - Kollerits, Barbara
AU - Rantner, Barbara
AU - Dieplinger, Benjamin
AU - Stadler, Marietta
AU - Mueller, Thomas
AU - Haltmayer, Meinhard
AU - Klein-Weigel, Peter
AU - Summerer, Monika
AU - Wichmann, H. -Erich
AU - Asselbergs, Folkert W.
AU - Navis, Gerjan
AU - Mateo Leach, Irene
AU - Brown-Gentry, Kristin
AU - Goodloe, Robert
AU - Assimes, Themistocles L.
AU - Becker, Diane M.
AU - Cooke, John P.
AU - Absher, Devin M.
AU - Olin, Jeffrey W.
AU - Mitchell, Braxton D.
AU - Reilly, Muredach P.
AU - Mohler, Emile R.
AU - North, Kari E.
AU - Reiner, Alexander P.
AU - Kronenberg, Florian
AU - Murabito, Joanne M.
PY - 2012/5
Y1 - 2012/5
N2 - Background: Candidate gene association studies for peripheral artery disease (PAD), including subclinical disease assessed with the ankle-brachial index (ABI), have been limited by the modest number of genes examined. We conducted a two stage meta-analysis of similar to 50,000 SNPs across similar to 2100 candidate genes to identify genetic variants for ABI.Methods and results: We studied subjects of European ancestry from 8 studies (n = 21,547, 55% women, mean age 44-73 years) and African American ancestry from 5 studies (n = 7267, 60% women, mean age 41-73 years) involved in the candidate gene association resource (CARe) consortium. In each ethnic group, additive genetic models were used (with each additional copy of the minor allele corresponding to the given beta) to test each SNP for association with continuous ABI (excluding ABI > 1.40) and PAD (defined as ABI <0.90) using linear or logistic regression with adjustment for known PAD risk factors and population stratification. We then conducted a fixed-effects inverse-variance weighted meta-analyses considering a p <2 x 10(-6) to denote statistical significance.Results: In the European ancestry discovery meta-analyses, rs2171209 in SYTL3 (beta = -0.007, p = 6.02 x 10(-7)) and rs290481 in TCF7L2 (beta = -0.008, p = 7.01 x 10(-7)) were significantly associated with ABI. None of the SNP associations for PAD were significant, though a SNP in CYP2B6 (p = 4.99 x 10(-5)) was among the strongest associations. These 3 genes are linked to key PAD risk factors (lipoprotein(a), type 2 diabetes, and smoking behavior, respectively). We sought replication in 6 population-based and 3 clinical samples (n = 15,440) for rs290481 and rs2171209. However, in the replication stage (rs2171209, p = 0.75; rs290481, p = 0.19) and in the combined discovery and replication analysis the SNP-ABI associations were no longer significant (rs2171209, p = 1.14 x 10(-3); rs290481, p = 8.88 x 10(-5)). In African Americans, none of the SNP associations for ABI or PAD achieved an experiment-wide level of significance.Conclusions: Genetic determinants of ABI and PAD remain elusive. Follow-up of these preliminary findings may uncover important biology given the known gene-risk factor associations. New and more powerful approaches to PAD gene discovery are warranted. (C) 2012 Elsevier Ireland Ltd. All rights reserved.
AB - Background: Candidate gene association studies for peripheral artery disease (PAD), including subclinical disease assessed with the ankle-brachial index (ABI), have been limited by the modest number of genes examined. We conducted a two stage meta-analysis of similar to 50,000 SNPs across similar to 2100 candidate genes to identify genetic variants for ABI.Methods and results: We studied subjects of European ancestry from 8 studies (n = 21,547, 55% women, mean age 44-73 years) and African American ancestry from 5 studies (n = 7267, 60% women, mean age 41-73 years) involved in the candidate gene association resource (CARe) consortium. In each ethnic group, additive genetic models were used (with each additional copy of the minor allele corresponding to the given beta) to test each SNP for association with continuous ABI (excluding ABI > 1.40) and PAD (defined as ABI <0.90) using linear or logistic regression with adjustment for known PAD risk factors and population stratification. We then conducted a fixed-effects inverse-variance weighted meta-analyses considering a p <2 x 10(-6) to denote statistical significance.Results: In the European ancestry discovery meta-analyses, rs2171209 in SYTL3 (beta = -0.007, p = 6.02 x 10(-7)) and rs290481 in TCF7L2 (beta = -0.008, p = 7.01 x 10(-7)) were significantly associated with ABI. None of the SNP associations for PAD were significant, though a SNP in CYP2B6 (p = 4.99 x 10(-5)) was among the strongest associations. These 3 genes are linked to key PAD risk factors (lipoprotein(a), type 2 diabetes, and smoking behavior, respectively). We sought replication in 6 population-based and 3 clinical samples (n = 15,440) for rs290481 and rs2171209. However, in the replication stage (rs2171209, p = 0.75; rs290481, p = 0.19) and in the combined discovery and replication analysis the SNP-ABI associations were no longer significant (rs2171209, p = 1.14 x 10(-3); rs290481, p = 8.88 x 10(-5)). In African Americans, none of the SNP associations for ABI or PAD achieved an experiment-wide level of significance.Conclusions: Genetic determinants of ABI and PAD remain elusive. Follow-up of these preliminary findings may uncover important biology given the known gene-risk factor associations. New and more powerful approaches to PAD gene discovery are warranted. (C) 2012 Elsevier Ireland Ltd. All rights reserved.
KW - Ankle brachial index
KW - Peripheral artery disease
KW - Genetics
KW - Candidate gene array
KW - Meta-analysis
KW - Ethnicity
KW - PERIPHERAL ARTERIAL-DISEASE
KW - GENOME-WIDE ASSOCIATION
KW - RISK LOCI
KW - APOLIPOPROTEIN(A) ISOFORMS
KW - INSULIN-RESPONSE
KW - FAMILY-HISTORY
KW - SUSCEPTIBILITY
KW - LIPOPROTEIN(A)
KW - POPULATION
KW - ATHEROTHROMBOSIS
U2 - 10.1016/j.atherosclerosis.2012.01.039
DO - 10.1016/j.atherosclerosis.2012.01.039
M3 - Article
SN - 0021-9150
VL - 222
SP - 138
EP - 147
JO - Atherosclerosis
JF - Atherosclerosis
IS - 1
ER -