Genome-wide linkage in a large Dutch consanguineous family maps a locus for intracranial aneurysms to chromosome 2p13.
OBJECTIVE
Familial occurrence of intracranial aneurysms suggests a genetic factor in the development of these aneurysms. In this study, we present the identification of a susceptibility locus for the development of intracranial aneurysms detected by a genome-wide linkage approach in a large consanguineous pedigree.


METHODS
Patients with clinical signs and symptoms of intracranial aneurysms, confirmed by radiological, surgical, or postmortem investigations, were included in the study. Magnetic resonance angiography was used to detect asymptomatic aneurysms in relatives.


RESULTS
Seven out of 20 siblings had an intracranial aneurysm. Genome-wide multipoint linkage analysis showed a significant logarithm of the odds score of 3.55.


CONCLUSIONS
In a large consanguineous pedigree intracranial aneurysms are linked to chromosome 2p13 in a region between markers D2S2206 and D2S2977.
Department of Neurology, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands. y.b.roos@amc.uva.nl
Y B W E M
YB
Roos
G
G
Pals
P M
PM
Struycken
G J E
GJ
Rinkel
M
M
Limburg
J C
JC
Pronk
J S P
JS
van den Berg
J A F M
JA
Luijten
P L
PL
Pearson
M
M
Vermeulen
A
A
Westerveld
D002874:Chromosome Mapping; D002889:Chromosomes, Human, Pair 2; D003241:Consanguinity; D005260:Female; D008040:Genetic Linkage; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000235:genetics*; D018810:Magnetic Resonance Angiography; D008297:Male; D009426:Netherlands; D010375:Pedigree