Cited by 54Cerebrovascular and genetic disordersGenetic Associations and EpidemiologyAdvanced Neuroimaging Techniques and Applications

Analysis of genetic variability and whole genome linkage of whole-brain, subcortical, and ependymal hyperintense white matter volume

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Kochunov, Peter, Glahn, David, Winkler, Anderson, Duggirala, Ravindranath, Olvera, Rene L., Cole, Shelley, Dyer, Thomas D., Almasy, Laura +2 more·2009·Stroke

Abstract

Background and Purpose— The cerebral volume of T2-hyperintense white matter (HWM) is an important neuroimaging marker of cerebral integrity. Pathophysiology studies identified that subcortical and ependymal HWM are produced by 2 different mechanisms but shared a common risk factor: high arterial pulse pressure. Recent studies have demonstrated high heritability of the whole-brain HMW volume and reported significant and suggestive evidence of genetic linkage. We performed heritability and whole-genome linkage analysis to replicate previous reported findings and to study shared genetic variance, and possible overlap for specific loci, between subcortical and ependymal HWM volumes in a population of healthy Mexican Americans. Methods— The volumes of subcortical and ependymal HWM regions were measured from high-resolution (1 mm 3 ), 3-dimensional fluid-attenuated inversion recovery images acquired for 459 (283 females, 176 males) active participants in the San Antonio Family Heart Study. Subjects ranged in age from 19 to 85 years of age (47.9±13.5 years) and were part of 49 families (9.4±8.5 individuals per family). Results— The volumes of whole-brain, subcortical, and ependymal HWM were highly heritable ( h 2 =0.72, 0.66, and 0.73, respectively). The subcortical and ependymal HWM volumes shared 21% of genetic variability indicating significant pleiotropy. Genomewide linkage analysis showed only a suggestive bivariate linkage for subcortical and ependymal HWM volumes (log of odds=2.12) on chromosome 1 at 288 cM. Conclusion— We replicated previous findings of high heritability for the whole-brain HWM volume. We also showed that subcortical and ependymal volume shared a significant portion of genetic variability and the bivarate linkage analysis produced a suggestive linkage near the locus previously identified in a study of whole-brain HWM volume and arterial pulse pressure.

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Crossref · 10.1161/strokeaha.109.565390

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Authors
Kochunov, P., Glahn, D., Winkler, A., Duggirala, R., Olvera, R. L., Cole, S., Dyer, T. D., Almasy, L., Fox, P. T., & Blangero, J.
Affiliations
Texas Biomedical Research Institute (US)
Venue
Stroke
Published
2009-12
Volume
40
Issue
12
Pages
3685-3690
ISSN
  • 0039-2499 (ISSN-L)
  • 1524-4628
OpenAlex
W2161730586
Cited by
54
References
43
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 5 · 2020: 1 · 2019: 4 · 2018: 4 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 3 · 2013: 5 · 2012: 5
FWCI
2.55
Type
journal article
Language
en
Open access
Locations
  • Stroke (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • ORBi (University of Liège) (submittedVersion, other-oa)
  • ScholarWorks @ UTRGV (The University of Texas Rio Grande Valley) (submittedVersion)
Funders
  • National Institute of Mental Health (R01MH078111, R01S MH078111, MH0708143, -MH078111, RO1s MH078111, R01MH083824, MH083824)
  • National Institute of Biomedical Imaging and Bioengineering (K01EB006395)
Topics
  • Health Sciences › Medicine › Neurology › Cerebrovascular and genetic disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
white matter hyperintensities, heritability, genetic linkage, subcortical white matter, pleiotropy, pulse pressure, San Antonio Family Heart Study, Mexican Americans
MeSH terms
Adult, Aged, Aged, 80 and over, Aging, Brain Ischemia, Chromosome Mapping, DNA Mutational Analysis, Ependyma, Female, Genetic Testing, Humans, Genetic Linkage, Magnetic Resonance Imaging, Male, Middle Aged, Nerve Fibers, Myelinated, Genetic Variation, Cerebrospinal Fluid Pressure, Cohort Studies, Biomarkers, Mexican Americans, Disease Progression, Intracranial Hypertension, Genetic Predisposition to Disease, Cerebrum, Young Adult, Leukoencephalopathies

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