APOL1, CDKN2A/CDKN2B, and HDAC9 polymorphisms and small vessel ischemic stroke

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22 Scopus citations

Abstract

Objective: Worldwide, the highest frequencies of APOL1-associated kidney variants are found in indigenous West Africans among whom small vessel disease (SVD) ischemic stroke is the most common stroke phenotype. The objective of this study was to investigate the association and effect sizes of 23 selected SNPs in 14 genes of relevance, including the APOL1 G1 variants, with the occurrence of SVD ischemic stroke among indigenous West African participants in the Stroke Investigative Research and Education Network (SIREN) Study. Materials and Methods: Cases were consecutively recruited consenting adults (aged 18 years or older) with neuroimaging—confirmed first clinical stroke. Stroke-free controls were ascertained using a locally validated version of the Questionnaire for Verifying Stroke-Free Status (QVSFS). Logistic regression models adjusting for known vascular risk factors were fitted to assess the associations of the 23 SNPs in rigorously phenotyped cases (N = 154) of SVD ischemic stroke and stroke-free (N = 483) controls. Results: Apolipoprotein L1 (APOL1) rs73885319 (OR = 1.52; CI: 1.09-2.13, P-value =.013), rs2383207 in CDKN2A/CDKN2B (OR = 3.08; CI: 1.15-8.26, P –value =.026) and rs2107595 (OR = 1.70; CI: 1.12-2.60, P-value =.014) and rs28688791 (OR = 1.52; CI: 1.03-2.26, P-value =.036) in HDAC9 gene were associated with SVD stroke at 0.05 significance level. Polymorphisms in other genes did not show significant associations. Conclusion: This is the first report of a specific association of APOL1 with a stroke subtype. Further research is needed to confirm these initial findings and deepen understanding of the genetics of stroke in people of African ancestry with possible implications for other ancestries as all humans originated from Africa.

Original languageEnglish
Pages (from-to)133-141
Number of pages9
JournalActa Neurologica Scandinavica
Volume137
Issue number1
DOIs
StatePublished - Jan 2018

Bibliographical note

Funding Information:
The SIREN project is supported by U54HG007479 from the National Institutes of Health (NIH) as part of the H3 Africa Consortium.

Funding Information:
The SIREN project is supported by U54HG007479 from the National

Publisher Copyright:
© 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd

Keywords

  • APOL1
  • African Ancestry
  • CDKN2A/CDKN2B
  • HDAC9
  • West Africa
  • candidate genes
  • small vessel disease
  • stroke

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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