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Related Concept Videos

Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
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Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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Published on: August 18, 2015

Polymorphisms and noncardioembolic stroke in three case-control studies.

May M Luke1, Klaus Berger, Charles M Rowland

  • 1Celera, Alameda, CA 94502, USA. may.luke@celera.com

Cerebrovascular Diseases (Basel, Switzerland)
|December 3, 2011
PubMed
Summary

Researchers identified six single nucleotide polymorphisms (SNPs) potentially linked to noncardioembolic stroke (nonCES). Further studies are needed to confirm these genetic associations and understand their role in nonCES.

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Area of Science:

  • Genetics and Genomics
  • Neurology
  • Stroke Research

Background:

  • Investigating gene variants associated with diseases can uncover novel biological mechanisms.
  • This study focused on identifying single nucleotide polymorphisms (SNPs) associated with noncardioembolic stroke (nonCES).

Purpose of the Study:

  • To identify specific single nucleotide polymorphisms (SNPs) associated with an increased risk of noncardioembolic stroke (nonCES).
  • To validate potential SNP associations across multiple independent study cohorts.

Main Methods:

  • Genomic association analysis of 24,926 SNPs in or near genes related to stroke.
  • Replication of SNP associations in three independent cohorts: Vienna, UCSF-CC, and German studies.
  • Evaluation of SNP associations using pooled and individual DNA samples, followed by statistical analysis accounting for multiple testing.

Main Results:

  • Six out of 46 initially associated SNPs were replicated across all three study cohorts.
  • Specific SNPs (rs362277 in HTT, rs2924914 near CSMD1, rs1264352 near DDR1, rs544115 in NEU3, rs12481805 in UMODL1, and rs2857595 near NCR3) showed associations with nonCES.
  • The identified SNPs had a false discovery rate of 0.69 after accounting for multiple testing.

Conclusions:

  • While six SNPs showed potential association with nonCES, most may represent false positives.
  • These six SNPs warrant further investigation in larger and diverse nonCES study populations.
  • Confirmation of these genetic markers could offer new insights into nonCES pathogenesis.