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Intracranial aneurysms in Finnish families: confirmation of linkage and refinement of the interval to chromosome 19q13.3.

Abstract：

:We recently reported a two-stage genomewide screen of 48 sib pairs affected with intracranial aneurysms (IAs) that revealed suggestive linkage to chromosome 19q13, with a LOD score of 2.58. The region supporting linkage spanned approximately 22 cM. Here, we report a follow-up study of the locus at 19q13, with a sample size expanded to 139 affected sib pairs, along with 83 other affected relative pairs (222 affected relative pairs in total). Suggestive linkage was observed in both independent sample sets, and linkage was significant in the combined set at 70 cM (LOD score 3.50; P=.00006) and at 80 cM (LOD score 3.93; P=.00002). Linkage was highly significant at 70 cM (LOD score 5.70; P=.000001) and at 80 cM (LOD score 3.99; P=.00005) when a covariate measuring the number of affected individuals in the nuclear family was included. To evaluate further the contribution to the linkage signal from families with more than two affected relatives, we performed model-based linkage analysis with a recessive model and a range of penetrances, and we obtained maximum linkage at 70 cM (LOD score 3.16; P=.00007) with a penetrance of 0.3. We then estimated location by using GENEFINDER. The most likely location for a gene predisposing to IAs in the Finnish population is in a region with a 95% confidence interval of 11.6 cM (P=.00007) centered 2.0 cM proximal to D19S246.

journal_name

Am J Hum Genet

journal_title

American journal of human genetics

authors

van der Voet M,Olson JM,Kuivaniemi H,Dudek DM,Skunca M,Ronkainen A,Niemelä M,Jääskeläinen J,Hernesniemi J,Helin K,Leinonen E,Biswas M,Tromp G

doi

10.1086/382285

subject

Has Abstract

pub_date

2004-03-01 00:00:00

pages

564-71

issue

3

eissn

0002-9297

issn

1537-6605

pii

S0002-9297(07)61874-6

journal_volume

74

pub_type

杂志文章

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