Our long-term objective is to identify susceptibility genes that are related to the formation of intracranial aneurysms (IA). Rupture of IAs occurs in 16,000 to 17,000 persons in the U.S. annually, and nearly half of affected persons are dead within the first 30 days. An additional 6,000 to 7,000 persons with unruptured IAs are identified each year. Accumulated evidence indicates that a genetic component plays an important role in the development of IAs, but specific loci affecting the risk of IA have not been identified. The primary hypothesis of this study is that there are specific human chromosomal regions that are associated with an increased risk of IAs.
Specific Aims of the proposal are: 1. Recruitment of 400 families with multiple individuals who have an IA through 23 referral centers throughout North America, Australia, and New Zealand that represent 35 recruitment sites. 2. Ascertainment of interviews and blood samples from all affected family members, as well as their first-degree relatives. White blood cells from living persons with an IA will be cryopreserved at Cornell Institute for Medical Research for future immortalization of cells lines as indicated. 3. Identification of unruptured IAs by obtaining MRAs in selected asymptomatic siblings (of affected individuals). 4. Completion of a 10 cM genome series in persons with IAs, as well as the spouses and children of persons with an IA who are deceased. We will perform finer mapping of chromosomal regions with suggestive evidence of linkage in the genome screen. 5. Performance of a nonparametric (allele sharing) linkage analysis, including relevant environmental factors such as smoking, to identify chromosomal regions linked to IA. Reconstruction of the genotypes of deceased affected family members will be performed. Identification of individuals who are genetically at high risk for the development of IAs would enable targeted and effective screening/prevention/treatment strategies to reduce the substantial mortality and morbidity associated with this devastating type of stroke. Only a multidisciplinary, collaborative effort to identify, accrue, and genotype FIA families will be successful in identifying sufficient high-risk families to characterize the genetic basis of IA.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS039512-04
Application #
6929700
Study Section
Special Emphasis Panel (ZNS1-SRB-K (01))
Program Officer
Gwinn, Katrina
Project Start
2002-09-18
Project End
2007-07-31
Budget Start
2005-08-01
Budget End
2006-07-31
Support Year
4
Fiscal Year
2005
Total Cost
$3,345,691
Indirect Cost
Name
University of Cincinnati
Department
Neurology
Type
Schools of Medicine
DUNS #
041064767
City
Cincinnati
State
OH
Country
United States
Zip Code
45221
Mackey, Jason; Brown, Robert D; Sauerbeck, Laura et al. (2015) Affected twins in the familial intracranial aneurysm study. Cerebrovasc Dis 39:82-6
Farlow, Janice L; Lin, Hai; Sauerbeck, Laura et al. (2015) Lessons learned from whole exome sequencing in multiplex families affected by a complex genetic disorder, intracranial aneurysm. PLoS One 10:e0121104
Foroud, Tatiana; Lai, Dongbing; Koller, Daniel et al. (2014) Genome-wide association study of intracranial aneurysm identifies a new association on chromosome 7. Stroke 45:3194-9
Foroud, Tatiana; FIA Study Investigators (2013) Whole exome sequencing of intracranial aneurysm. Stroke 44:S26-8
Southerland, Andrew M; Meschia, James F; Worrall, Bradford B (2013) Shared associations of nonatherosclerotic, large-vessel, cerebrovascular arteriopathies: considering intracranial aneurysms, cervical artery dissection, moyamoya disease and fibromuscular dysplasia. Curr Opin Neurol 26:13-28
Flaherty, Matthew L; Kissela, Brett; Khoury, Jane C et al. (2013) Carotid artery stenosis as a cause of stroke. Neuroepidemiology 40:36-41
Sauerbeck, Laura; Hornung, Richard; Woo, Daniel et al. (2013) Mortality and causes of death in the Familial Intracranial Aneurysm study. Int J Stroke 8:696-700
Woo, Daniel (2013) Location, interaction, and anticipation of aneurysm formation. Acta Neurochir Suppl 115:279-80
Foroud, Tatiana; Koller, Daniel L; Lai, Dongbing et al. (2012) Genome-wide association study of intracranial aneurysms confirms role of Anril and SOX17 in disease risk. Stroke 43:2846-52
Mackey, Jason; Brown Jr, Robert D; Moomaw, Charles J et al. (2012) Unruptured intracranial aneurysms in the Familial Intracranial Aneurysm and International Study of Unruptured Intracranial Aneurysms cohorts: differences in multiplicity and location. J Neurosurg 117:60-4

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