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Prof. Dr. H. Schunkert Medizinische Klinik II UK S-H Campus Lübeck Genome-wide association for myocardial infarction
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Clinical Demands for Genetic Testing
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Myocardial infarction Genes Calcification/ Remodeling/ Plaque formation Hyperlipidemia ? Genes environment Hypertensionsmoking Hypercoagulation Inflammation/ Endothelial dysfunction Diab. mell. Clin Res Cardiol. 2007;96:1-7
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Which genes are responsible?
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Genome-wide Map - Microsatellites 13 4 5 15 1413 1211 1098 7 6 16 20 21 1817 22 19 2 Resolution: n=400
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MI locus 14q32 Nat Genet 2002;30:210-214 point LOD 3.9 p= 0.00015 genome wide LOD p< 0.05 1 2 3 4 020406080100120 D14S742D14S128 D14S608 D14S599D14S587D14S588GATA139A07D14S617 D14S592 D14S606D14S143D14S979 D14S1019 D14S267 D14S1426 D14S985 D14S1051 D14S292 D14S1007 LOD cM
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linkage-Scans for atherosclerosis genetic hot spots for CAD Clin Res Cardiol 2007; 96:1–7
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2007 2006 2005 2000 1992 candidate gene- polymorphisms genome-wide linkage analysis 10k-SNP Chip LOD black box : myocardial infarction 500k-SNP Chip 1000k-SNP Chip the key: a chip!
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Genome-wide Map - SNPs 13 4 5 15 1413 1211 1098 7 6 16 20 21 1817 22 19 2 resolution: N=1.000.000 1 2 3
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rs1333049 Better Coverage Chromosome 9p21.3 Gene
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genome scan - 500,000s SNPs identification of positive regions replication 2.000 affected individuals2.000 healthy individuals 1 22 GWAs – Strategy I
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GWAs – Strategy II 2000 cases 3200 controls 1988 cases 3000 controls
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NEJM 2007; 357: 443-453
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Association of locus on chromosome 9p21.3 with CAD rs599839 NEJM 2007; 357: 443-453
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Structure of the chromosome 9 CAD-associated locus T2DM Signal NEJM 2007; 357: 443-453 -Log p-value
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Association of locus on chromosome 9p21.3 with CAD McPherson R et al. Science 2007;316:1488-1491 Most replicated locus for CAD risk to date
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Association of locus on chromosome 9p21.3 with CAD Helgadottir A et al. Science 2007; 316:1491-1493 Most replicated locus for CAD risk to date
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SNPs with triple replication across 3 GWAs 13 out of 16 SNPs with triple replication are located at 9p21 ! (Circulation Suppl 2007)
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Replicated association between chromosome 9p21.3 and MI risk (in revision)
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Broadbend et al (Procardis) Hum Mol Gen 2008 (in press) Replicated association between chromosome 9p21.3 and MI risk
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Broadbend et al (Procardis) Hum Mol Gen 2008 (in press) Replicated association between chromosome 9p21.3 and MI risk
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Broadbend et al (Procardis) Hum Mol Gen 2008 (in press) Replicated association between chromosome 9p21.3 and MI risk
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Helgadottir et al (deCode) Nat Genet 2008 (in press)
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Replicated association between chromosome 9p21.3 and MI risk in Korea Shen et al ATVB 2008;28; in press n=294 n=611
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rs1333049rs7865618 rs1292136 rs7044859 Haplotype TGGT ACAC Haplotype analysis of the chromosome 9 CAD-associated locus WTCCC Study: Odds ratio1.48 (1.34-1.64) per copy of the ACAC haplotype German MI Study: Odds ratio1.34 (1.12-1.59) per copy of the ACAC haplotype NEJM 2007; 357: 443-453
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rs1333049 rs7865618 rs1292136 rs7044859 Haplotype analysis of the chromosome 9 CAD-associated locus rs1333049-C allele according to the haplotypic backgrounds
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Further genomewide results
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Other loci strongly associated with CAD identified from joint analysis of the WTCCC Study and German MI Study LOCUSSNPRISK ALLELE AND FREQUENCY ODDS RATIO PER COPY OF RISK ALLELE P-VALUEFPRPGENES 6q25.1rs6922269A (0.25)1.23 (1.15-1.33)2.90x10 -8 0.0023MTHFD1L 2q36.3rs2943634C (0.65)1.21 (1.13-1.30)1.61x10 -7 0.0190--- 1p13.3rs599839A (0.77)1.29 (1.18-1.40)4.05x10 --9 0.0006PSRC1/ CELRS2 1q41rs17465637C (0.71)1.20 (1.12-1.30)1.27x10 -6 0.1314MIA3 10q11.21rs501120T (0.87)1.33 (1.20-1.48)9.46x10 -8 0.0234CXCL12 15q22.33rs17228212C (0.30)1.21 (1.13-1.30)1.98x10 -7 0.0178SMAD3 NEJM 2007; 357: 443-453
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100% 50% 0% Chr 9 Chr 6 Chr 2 Population attributable risk Genomics for risk prediction NEJM 2007; 357: 443-453
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Novel CAD loci affect risk in both men and women LOCUSSNPODDS RATIO MALE P-VALUE MALE ODDS RATIO FEMALE P-VALUE FEMALE 1p13.3rs5998391.36 (1.16-1.59)1.33x10 -4 1.27 (1.14-1.41)7.61x10 -6 1q41rs174656371.24 (1.12-1.36)1.15x10 -5 1.19 (1.04-1.37)1.24x10 -2 2q36.3rs29436341.20 (1.10-1.32)4.48x10 -5 1.22 (1.07-1.39)2.30x10 -3 6q25.1rs69222691.24 (1.13-1.37)4.56x10 -6 1.23 (1.07-1.41)3.13x10 -3 9p21.3rs13330491.35 (1.24-1.47)7.03x10 -12 1.35 (1.19-1.52)1.90x10 -6 10q11.21rs5011201.30 (1.14-1.48)8.20x10 -5 1.56 (1.27-1.91)1.30x10 -5 15q22.33rs172282121.24 (1.13,1.36)7.68x10 -6 1.16 (1.02-1.33)2.56x10 -2 2117 male cases and 2259 male controls and 684 female cases and 2323 female controls NEJM 2007; 357: 443-453
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Graphic n=2022 0.2 0.4 0.6 0 Ger MI Fam n=847 P=3.8x10 -6 P=1x10 -4 Chol (mmol/L) per rs599839-allele WTCCC n=2022 1.2 1.4 1.6 1 Ger MI Fam n=847 P=2.1x10 -5 P=3.1x10 -5 MI risk per rs599839-allele NEJM 2007; 357: 443-453 CELSR2 PSRC1 25.7kb 4kb 3.6kb 1 0.8 r 2 0.6 0.4 0.2 0 -35000 -30000 -25000 -20000 -15000 -10000 -5000 0 5000 10000 bp from SNP rs599839 Chromosome 1p13.3 109500k 109510k 109520k 109530k 109540k 0 0.5 1 r 2 rs4970834 rs611917 rs7528419 rs12740374 rs660240 rs658435 rs629301 rs646776 rs17035949 rs602633 rs599839 PSRC1 and CELSR2 genes associate with serum cholesterol and MI risk (in revision)
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4 SNPs associate with MI GWA German MI Family Study 4 SNPs associate with LDL GWA MONICA/KORA Study LDL-R locus associates with serum cholesterol and MI risk P. Linsel-Nitschke (unpublished)
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LDL-R locus associates with serum cholesterol and MI risk imputation of the locus 10 -2 top SNPs for MI top SNPs for LDL P. Linsel-Nitschke (unpublished)
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Myocardial infarction Chrom 9p21 Plaque formation Hyperlipidemia PCSK9Chrom 19p13 Chrom 1p13 Vascular defect
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Genetic score for MI risk 20 risk alleles 400 risk alleles 80 risk alleles 40 risk alleles Ortlepp et al Euro J Intern Med 2002; 13:485 MI patientscontrols 10 genes = 20 alleles
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Genetic score for MI risk 20 risk alleles 400 risk alleles 80 risk alleles 40 risk alleles Ortlepp et al Euro J Intern Med 2002; 13:485
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molecular genetics of myocardial infarction yesterday pos. family hx : important risk factor (predictor) for CAD today (missed) opportunities for prevention tomorrow individual genetic risk prediction?
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Mendels threat
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