@article {1243,
	title = {Four novel Loci (19q13, 6q24, 12q24, and 5q14) influence the microcirculation in vivo.},
	journal = {PLoS Genet},
	volume = {6},
	year = {2010},
	month = {2010 Oct 28},
	pages = {e1001184},
	abstract = {<p>There is increasing evidence that the microcirculation plays an important role in the pathogenesis of cardiovascular diseases. Changes in retinal vascular caliber reflect early microvascular disease and predict incident cardiovascular events. We performed a genome-wide association study to identify genetic variants associated with retinal vascular caliber. We analyzed data from four population-based discovery cohorts with 15,358 unrelated Caucasian individuals, who are members of the Cohort for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium, and replicated findings in four independent Caucasian cohorts (n  =  6,652). All participants had retinal photography and retinal arteriolar and venular caliber measured from computer software. In the discovery cohorts, 179 single nucleotide polymorphisms (SNP) spread across five loci were significantly associated (p<5.0{\texttimes}10(-8)) with retinal venular caliber, but none showed association with arteriolar caliber. Collectively, these five loci explain 1.0\%-3.2\% of the variation in retinal venular caliber. Four out of these five loci were confirmed in independent replication samples. In the combined analyses, the top SNPs at each locus were: rs2287921 (19q13; p  =  1.61{\texttimes}10(-25), within the RASIP1 locus), rs225717 (6q24; p = 1.25{\texttimes}10(-16), adjacent to the VTA1 and NMBR loci), rs10774625 (12q24; p  =  2.15{\texttimes}10(-13), in the region of ATXN2,SH2B3 and PTPN11 loci), and rs17421627 (5q14; p = 7.32{\texttimes}10(-16), adjacent to the MEF2C locus). In two independent samples, locus 12q24 was also associated with coronary heart disease and hypertension. Our population-based genome-wide association study demonstrates four novel loci associated with retinal venular caliber, an endophenotype of the microcirculation associated with clinical cardiovascular disease. These data provide further insights into the contribution and biological mechanisms of microcirculatory changes that underlie cardiovascular disease.</p>},
	keywords = {Adolescent, Adult, Aged, Aged, 80 and over, Cardiovascular Diseases, Child, Child, Preschool, Chromosomes, Human, Pair 12, Chromosomes, Human, Pair 19, Chromosomes, Human, Pair 5, Chromosomes, Human, Pair 6, Cohort Studies, European Continental Ancestry Group, Female, Genetic Loci, Genome-Wide Association Study, Humans, Male, Meta-Analysis as Topic, Microcirculation, Middle Aged, Polymorphism, Single Nucleotide, Retinal Vessels, Young Adult},
	issn = {1553-7404},
	doi = {10.1371/journal.pgen.1001184},
	author = {Ikram, M Kamran and Sim, Xueling and Xueling, Sim and Jensen, Richard A and Cotch, Mary Frances and Hewitt, Alex W and Ikram, M Arfan and Wang, Jie Jin and Klein, Ronald and Klein, Barbara E K and Breteler, Monique M B and Cheung, Ning and Liew, Gerald and Mitchell, Paul and Uitterlinden, Andr{\'e} G and Rivadeneira, Fernando and Hofman, Albert and de Jong, Paulus T V M and van Duijn, Cornelia M and Kao, Linda and Cheng, Ching-Yu and Smith, Albert Vernon and Glazer, Nicole L and Lumley, Thomas and McKnight, Barbara and Psaty, Bruce M and Jonasson, Fridbert and Eiriksdottir, Gudny and Aspelund, Thor and Harris, Tamara B and Launer, Lenore J and Taylor, Kent D and Li, Xiaohui and Iyengar, Sudha K and Xi, Quansheng and Sivakumaran, Theru A and Mackey, David A and Macgregor, Stuart and Martin, Nicholas G and Young, Terri L and Bis, Josh C and Wiggins, Kerri L and Heckbert, Susan R and Hammond, Christopher J and Andrew, Toby and Fahy, Samantha and Attia, John and Holliday, Elizabeth G and Scott, Rodney J and Islam, F M Amirul and Rotter, Jerome I and McAuley, Annie K and Boerwinkle, Eric and Tai, E Shyong and Gudnason, Vilmundur and Siscovick, David S and Vingerling, Johannes R and Wong, Tien Y}
}
