@article {6810, title = {Coagulation factor~XII genetic variation, ex~vivo thrombin generation, and stroke risk in the elderly: results from the Cardiovascular Health Study.}, journal = {J Thromb Haemost}, volume = {13}, year = {2015}, month = {2015 Oct}, pages = {1867-77}, abstract = {

BACKGROUND: The relationships of thrombin generation (TG) with cardiovascular disease risk are underevaluated in population-based cohorts.

OBJECTIVES: To evaluate the relationships of TG influenced by the contact and tissue factor coagulation pathways ex~vivo with common single-nucleotide polymorphisms (SNPs) and incident cardiovascular disease and stroke.

PATIENTS/METHODS: We measured peak TG (pTG) in baseline plasma samples of Cardiovascular Health Study participants (n~=~5411), both with and without inhibitory anti-factor~XIa antibody (pTG/FXIa(-) ). We evaluated their associations with ~~50~000 SNPs by using the IBCv2 genotyping array, and with incident cardiovascular disease and stroke events over a median follow-up of 13.2~years.

RESULTS: The minor allele for an SNP in the FXII gene (F12), rs1801020, was associated with lower pTG in European-Americans (β~=~-~34.2~{\textpm}~3.5~nm; P~=~3.3~{\texttimes}~10(-22) ; minor allele frequency [MAF]~=~0.23) and African-Americans (β~=~-~31.1~{\textpm}~7.9~nm; P~=~9.0~{\texttimes} 10(-5) ; MAF~=~0.42). Lower FXIa-independent pTG (pTG/FXIa(-) ) was associated with the F12 rs1801020 minor allele, and higher pTG/FXIa(-) was associated with the ABO SNP rs657152 minor allele (β~=~16.3~nm; P~=~4.3~{\texttimes}~10(-9) ; MAF~=~0.37). The risk factor-adjusted ischemic stroke hazard ratios were 1.09 (95\% confidence interval CI~1.01-1.17; P~=~0.03) for pTG, 1.06 (95\% CI~0.98-1.15; P~=~0.17) for pTG/FXIa(-) , and 1.11 (95\% CI~1.02-1.21; P~=~0.02) for FXIa-dependent pTG (pTG/FXIa(+) ), per one standard deviation increment (n~=~834 ischemic strokes). In a multicohort candidate gene analysis, rs1801020 was not associated with incident ischemic stroke (β~=~-~0.02; standard error~=~0.08; P~=~0.81).

CONCLUSIONS: These results support the importance of contact activation pathway-dependent TG as a risk factor for ischemic stroke, and indicate the importance of F12 SNPs for TG ex~vivo and in~vivo.

}, keywords = {African Americans, Age Factors, Aged, Blood Coagulation, Brain Ischemia, European Continental Ancestry Group, Factor XII, Female, Gene Frequency, Genetic Predisposition to Disease, Humans, Incidence, Male, Phenotype, Polymorphism, Single Nucleotide, Prospective Studies, Risk Assessment, Risk Factors, Stroke, Thrombin, Time Factors, United States}, issn = {1538-7836}, doi = {10.1111/jth.13111}, author = {Olson, N C and Butenas, S and Lange, L A and Lange, E M and Cushman, M and Jenny, N S and Walston, J and Souto, J C and Soria, J M and Chauhan, G and Debette, S and Longstreth, W T and Seshadri, S and Reiner, A P and Tracy, R P} } @article {6799, title = {GWAS for executive function and processing speed suggests involvement of the CADM2 gene.}, journal = {Mol Psychiatry}, volume = {21}, year = {2016}, month = {2016 Feb}, pages = {189-97}, abstract = {

To identify common variants contributing to normal variation in two specific domains of cognitive functioning, we conducted a genome-wide association study (GWAS) of executive functioning and information processing speed in non-demented older adults from the CHARGE (Cohorts for Heart and Aging Research in Genomic Epidemiology) consortium. Neuropsychological testing was available for 5429-32,070 subjects of European ancestry aged 45 years or older, free of dementia and clinical stroke at the time of cognitive testing from 20 cohorts in the discovery phase. We analyzed performance on the Trail Making Test parts A and B, the Letter Digit Substitution Test (LDST), the Digit Symbol Substitution Task (DSST), semantic and phonemic fluency tests, and the Stroop Color and Word Test. Replication was sought in 1311-21860 subjects from 20 independent cohorts. A significant association was observed in the discovery cohorts for the single-nucleotide polymorphism (SNP) rs17518584 (discovery P-value=3.12 {\texttimes} 10(-8)) and in the joint discovery and replication meta-analysis (P-value=3.28 {\texttimes} 10(-9) after adjustment for age, gender and education) in an intron of the gene cell adhesion molecule 2 (CADM2) for performance on the LDST/DSST. Rs17518584 is located about 170 kb upstream of the transcription start site of the major transcript for the CADM2 gene, but is within an intron of a variant transcript that includes an alternative first exon. The variant is associated with expression of CADM2 in the cingulate cortex (P-value=4 {\texttimes} 10(-4)). The protein encoded by CADM2 is involved in glutamate signaling (P-value=7.22 {\texttimes} 10(-15)), gamma-aminobutyric acid (GABA) transport (P-value=1.36 {\texttimes} 10(-11)) and neuron cell-cell adhesion (P-value=1.48 {\texttimes} 10(-13)). Our findings suggest that genetic variation in the CADM2 gene is associated with individual differences in information processing speed.

}, issn = {1476-5578}, doi = {10.1038/mp.2015.37}, author = {Ibrahim-Verbaas, C A and Bressler, J and Debette, S and Schuur, M and Smith, A V and Bis, J C and Davies, G and Trompet, S and Smith, J A and Wolf, C and Chibnik, L B and Liu, Y and Vitart, V and Kirin, M and Petrovic, K and Polasek, O and Zgaga, L and Fawns-Ritchie, C and Hoffmann, P and Karjalainen, J and Lahti, J and Llewellyn, D J and Schmidt, C O and Mather, K A and Chouraki, V and Sun, Q and Resnick, S M and Rose, L M and Oldmeadow, C and Stewart, M and Smith, B H and Gudnason, V and Yang, Q and Mirza, S S and Jukema, J W and deJager, P L and Harris, T B and Liewald, D C and Amin, N and Coker, L H and Stegle, O and Lopez, O L and Schmidt, R and Teumer, A and Ford, I and Karbalai, N and Becker, J T and Jonsdottir, M K and Au, R and Fehrmann, R S N and Herms, S and Nalls, M and Zhao, W and Turner, S T and Yaffe, K and Lohman, K and van Swieten, J C and Kardia, S L R and Knopman, D S and Meeks, W M and Heiss, G and Holliday, E G and Schofield, P W and Tanaka, T and Stott, D J and Wang, J and Ridker, P and Gow, A J and Pattie, A and Starr, J M and Hocking, L J and Armstrong, N J and McLachlan, S and Shulman, J M and Pilling, L C and Eiriksdottir, G and Scott, R J and Kochan, N A and Palotie, A and Hsieh, Y-C and Eriksson, J G and Penman, A and Gottesman, R F and Oostra, B A and Yu, L and DeStefano, A L and Beiser, A and Garcia, M and Rotter, J I and N{\"o}then, M M and Hofman, A and Slagboom, P E and Westendorp, R G J and Buckley, B M and Wolf, P A and Uitterlinden, A G and Psaty, B M and Grabe, H J and Bandinelli, S and Chasman, D I and Grodstein, F and R{\"a}ikk{\"o}nen, K and Lambert, J-C and Porteous, D J and Price, J F and Sachdev, P S and Ferrucci, L and Attia, J R and Rudan, I and Hayward, C and Wright, A F and Wilson, J F and Cichon, S and Franke, L and Schmidt, H and Ding, J and de Craen, A J M and Fornage, M and Bennett, D A and Deary, I J and Ikram, M A and Launer, L J and Fitzpatrick, A L and Seshadri, S and van Duijn, C M and Mosley, T H} } @article {7581, title = {Associations of activated coagulation factor VII and factor VIIa-antithrombin levels with genome-wide polymorphisms and cardiovascular disease risk.}, journal = {J Thromb Haemost}, volume = {16}, year = {2018}, month = {2018 Jan}, pages = {19-30}, abstract = {

ESSENTIALS: Essentials A fraction of coagulation factor VII circulates in blood as an activated protease (FVIIa). We evaluated FVIIa and FVIIa-antithrombin (FVIIa-AT) levels in the Cardiovascular Health Study. Polymorphisms in the F7 and PROCR loci were associated with FVIIa and FVIIa-AT levels. FVIIa may be an ischemic stroke risk factor in older adults and FVIIa-AT may assess mortality risk.

SUMMARY: Background A fraction of coagulation factor (F) VII circulates as an active protease (FVIIa). FVIIa also circulates as an inactivated complex with antithrombin (FVIIa-AT). Objective Evaluate associations of FVIIa and FVIIa-AT with genome-wide single nucleotide polymorphisms (SNPs) and incident coronary heart disease, ischemic stroke and mortality. Patients/Methods We measured FVIIa and FVIIa-AT in 3486 Cardiovascular Health Study (CHS) participants. We performed a genome-wide association scan for FVIIa and FVIIa-AT in European-Americans (n~=~2410) and examined associations of FVII phenotypes with incident cardiovascular disease. Results In European-Americans, the most significant SNP for FVIIa and FVIIa-AT was rs1755685 in the F7 promoter region on chromosome 13 (FVIIa, β~=~-25.9~mU~mL-1 per minor allele; FVIIa-AT, β~=~-26.6~pm per minor allele). Phenotypes were also associated with rs867186 located in PROCR on chromosome 20 (FVIIa, β~=~7.8~mU~mL-1 per minor allele; FVIIa-AT, β~=~9.9 per minor allele). Adjusted for risk factors, a one standard deviation higher FVIIa was associated with increased risk of ischemic stroke (hazard ratio [HR],~1.12; 95\% confidence interval [CI], 1.01, 1.23). Higher FVIIa-AT was associated with mortality from all causes (HR, 1.08; 95\% CI, 1.03, 1.12). Among European-American CHS participants the rs1755685 minor allele was associated with lower ischemic stroke (HR, 0.69; 95\% CI, 0.54, 0.88), but this association was not replicated in a larger multi-cohort analysis. Conclusions The results support the importance of the F7 and PROCR loci in variation in circulating FVIIa and FVIIa-AT. The findings suggest FVIIa is a risk factor for ischemic stroke in older adults, whereas higher FVIIa-AT may reflect mortality risk.

}, issn = {1538-7836}, doi = {10.1111/jth.13899}, author = {Olson, N C and Raffield, L M and Lange, L A and Lange, E M and Longstreth, W T and Chauhan, G and Debette, S and Seshadri, S and Reiner, A P and Tracy, R P} }