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2009 Vienna - European Society of Human Genetics

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Statistical genetics, includes Mapping, linkage and association methods<br />

vs. ID+II= 2.897, 95% CI 1.409-5.955, p=0.003). Average aneurysm<br />

diameter was largest in patients with DD genotype (82.46 ± 3.3 mm)<br />

compared to ID and II genotypes, but the difference was not statistically<br />

significant (H=4.71, p=0.09).<br />

Conclusion: our results show significant association between ACE DD<br />

genotype and susceptibility to AAA.<br />

P08.09<br />

APOc3 Gene -482 c>t Polymorphism and Plasma triglyceride<br />

Levels in a turkish Population<br />

E. Taskin1,2 , H. Bagci1,2 , K. Cengiz3,2 ;<br />

1 2 Department <strong>of</strong> Medical Biology and <strong>Genetics</strong>, Samsun, Turkey, Ondokuz<br />

Mayis Univercity, School <strong>of</strong> Medicine, Samsun, Turkey, 3Department <strong>of</strong> Nephrology,<br />

Samsun, Turkey.<br />

Coronary artery disease (CAD) is the leading cause <strong>of</strong> death in the<br />

United States and in Europe. Elevated plasma concentrations <strong>of</strong> triglycerides<br />

is an independent risk factor for CAD. APOC3 is a member<br />

<strong>of</strong> apolipoprotein gene family. Several studies demonstrated that<br />

-482 C>T single nucleotide polymorphism within the insulin responsive<br />

element in the promoter <strong>of</strong> APOC3 gene is associated with elevated<br />

plasma triglyceride levels.<br />

We investigated the distribution <strong>of</strong> APOC3 gene -482 C>T polymorphism<br />

in 67 hypertriglyceridemic patients and 147 age and sex matched<br />

controls. Genomic DNA was extracted from whole blood by salting out<br />

method. The polymorphism was analyzed using polymerase chain reaction<br />

(PCR) - restriction fragment length polymorphism (RFLP) assay.<br />

Genotype and allele frequencies and their associations with CAD risk,<br />

demographic factors, and smoking status were investigated.<br />

The percentages <strong>of</strong> the CC, CT, and TT genotypes were 34.3%,<br />

10.4%, 55% for the patients and 46%, 8.2%, 45.6% for the controls,<br />

respectively. There was no significant association between the APOC3<br />

-482C>T polymorphism and plasma triglyceride levels in the studied<br />

population. (OR=1.39, %95 CI=0.89 - 2.18, P= 0.131).<br />

P08.10<br />

Genome-wide association <strong>of</strong> pulse wave analysis phenotypes in<br />

two isolated populations<br />

C. S. Franklin 1 , R. A. Payne 1 , S. H. Wild 1 , O. Polasek 2 , I. Kolcic 2 , V. Vitart 3 , C.<br />

Hayward 3 , C. McEniery 4 , J. Cockcr<strong>of</strong>t 5 , K. O’Shaughnessy 4 , I. Wilkinson 4 , A. F.<br />

Wright 3 , I. Rudan 6,7 , H. Campbell 1 , D. J. Webb 1 , J. F. Wilson 1 ;<br />

1 University <strong>of</strong> Edinburgh, Edinburgh, United Kingdom, 2 University <strong>of</strong> Zagreb,<br />

Zagreb, Croatia, 3 MRC <strong>Human</strong> <strong>Genetics</strong> Unit, Edinburgh, United Kingdom,<br />

4 University <strong>of</strong> Cambridge, Cambridge, United Kingdom, 5 University <strong>of</strong> Wales,<br />

Cardiff, United Kingdom, 6 University <strong>of</strong> Split, Split, Croatia, 7 University Hospital<br />

“Sestre Milosrdnice”, Zagreb, Croatia.<br />

Pulse wave analysis (PWA) using the SphygmoCor system is a noninvasive<br />

applanation tonometry-based method <strong>of</strong> recording the pulse<br />

pressure waveform in a peripheral artery. The corresponding central<br />

pressure waveform can be derived from the measured radial waveform.<br />

The shape <strong>of</strong> this wave contains information on cardiac contractility<br />

and the size, speed and shape <strong>of</strong> wave reflection, which are in<br />

turn determined by factors like arterial stiffness. A number <strong>of</strong> PWA parameters<br />

including the augmentation index are associated with classical<br />

cardiovascular risk factors and events. We have measured a range<br />

<strong>of</strong> PWA phenotypes in samples from two island isolates; the Orkney<br />

Isles in Scotland (540 subjects) and the Croatian island <strong>of</strong> Korcula<br />

(480 subjects). All samples were genotyped at 318,000 SNP markers<br />

using Illumina beadchips. Association tests were performed separately<br />

in the two populations using a genomic kinship method to correct for<br />

the close relationships among participants. Meta-analysis <strong>of</strong> these<br />

data identified seven separate genomic regions showing novel associations<br />

(up to P = 3 x 10^-8), with one or more <strong>of</strong> the PWA phenotypes,<br />

including central augmentation pressure and time delay from incident<br />

to reflected wave. Replication has been sought in 3000 independent<br />

samples from the Anglo-Cardiff Collaborative Trial (ACCT). Several<br />

genes and potential regulatory regions which have not previously been<br />

associated with haemodynamic traits have been identified here and<br />

therefore warrant further study.<br />

P08.11<br />

Identification <strong>of</strong> genes regulated by disease associated SNPs in<br />

gene deserts<br />

U. Potočnik 1,2 , K. Repnik 1 , M. Dean 3 ;<br />

1 Medical faculty, Maribor, Slovenia, 2 Faculty for chemistry and chemical engineering,<br />

Maribor, Slovenia, 3 NIH-National Cancer Institute, Frederick, MD,<br />

United States.<br />

Genome wide association studies in complex diseases such as asthma<br />

and inflammatory bowel diseases (IBD) revealed in many candidate<br />

chromosomal regions SNPs and haplotypes most significantly<br />

associated with disease are located in non-coding regions or even in<br />

“gene deserts” suggesting SNPs in non-coding regions play important<br />

role in complex diseases.<br />

We have developed approach for identification <strong>of</strong> functional SNPs<br />

in cis-elements associated with allele specific expression in disease<br />

candidate regions. In this approach we initially correlated our gene<br />

expression data we have obtained from more than 500 lymphoblastoid<br />

cell lines from CEPH families to public released International HapMap<br />

project genotype data preformed on the DNA isolated from the same<br />

CEPH cell lines. We have confirmed genotype-gene expression correlation<br />

resulting from lymphoblastoid CEPH cell lines in blood lymphocytes<br />

isolated from patients trios using quantitative transmission<br />

disequilibrium test (qTDT). In addition we confirmed genotype-gene<br />

expression correlations in patients tissue biopsies where available.<br />

The SNPs most significantly associated with altered gene expression<br />

were used for disease association study in patients and controls. We<br />

have applied our approach to Slovenian IBD and asthma cohorts each<br />

consisting <strong>of</strong> more than 400 patients and matching healthy controls<br />

and among others confirmed PTGER4 gene as best candidate gene in<br />

5p13.1 IBD candidate region.<br />

P08.12<br />

the LKB1-AmPK-tORc2 signaling pathway and its contribution<br />

with development <strong>of</strong> type 2 diabetes in Japanese<br />

M. Shahdinejad Langroudi 1 , B. Rahmati 1 , P. Keshavarz 1 , M. Itakura 2 ;<br />

1 Guilan University <strong>of</strong> Medical Science, Rasht, Islamic Republic <strong>of</strong> Iran, 2 Institute<br />

for Genome Research, The University <strong>of</strong> Tokushima, Tokushima, Japan.<br />

The LKB1-AMPK-TORC2 signaling pathway controls glucose homeostasis<br />

in the liver, and mediates therapeutic effects on insulin sensitizing<br />

antidiabetic agents.We hypothesized that genetic polymorphisms<br />

<strong>of</strong> the STK11, PRKAA2 (encoding AMPK α 2 subunit) and CRTC2 (encoding<br />

TORC2) could influence the susceptibility to T2D. We screened<br />

exons, untranslated regions and exon-intron boundary <strong>of</strong> STK11 and<br />

CRTC2 and genotyped in 1787 Japanese subjects. Additionally, the<br />

previously described association between the PRKAA2 haplotype and<br />

T2D was tested for replication. According to single locus association<br />

test, an intronic SNP in the STK11 (rs741765; OR 1.33, 95% CI 1.05-<br />

1.67, p = 0.017, under a recessive genetic model), and a non-synonymous<br />

SNP in the CRTC2 (6909C > T: Arg379Cys; OR 3.01, 95%<br />

CI 1.18-7.66, p = 0.016, under a dominant model) showed a nominal<br />

significant association with T2D. In PRKAA2, two non coding SNPs,<br />

rs1418442 (previously been reported to be associated with serum<br />

cholesterol in Caucasian females) and rs932447 were associated<br />

moderately with T2D (OR 0.62, 95% CI 0.40-0.96, p = 0.030, under<br />

a recessive model). Haplotype analysis showed that only in STK11,<br />

one haplotype containing the minor T allele <strong>of</strong> rs741765 was slightly<br />

associated with T2D (P=0.04). The association <strong>of</strong> PRKAA2 haplotype<br />

reported previously in Japanese was not replicated in our samples.<br />

Among the three genes investigated herein, gene-gene (SNP-SNP) interaction<br />

studies provided evidence for an interaction between STK11<br />

and CRTC2 influencing susceptibility to T2D. In conclusion, we found a<br />

weak evidence that STK11, PRKAA2, or CRTC2 polymorphisms contribute<br />

to the susceptibility to T2D in Japanese.<br />

P08.13<br />

On the value <strong>of</strong> family data in genome-wide association studies<br />

for quantitative traits<br />

A. Saint-Pierre, M. Martinez;<br />

Inserm, Toulouse, France.<br />

GWAS <strong>of</strong> quantitative traits are typically done using population-based<br />

samples <strong>of</strong> subjects that are, most <strong>of</strong>ten, ascertained irrespective <strong>of</strong><br />

their trait values or <strong>of</strong> the trait distribution in their relatives. It is well<br />

known, however, that greater power can be achieved in genetic pop-

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