Related Experiment Video
Updated: Jun 25, 2026
07:26
Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery
Published on: May 24, 2021
Genetic association studies in ischaemic stroke: replication failure and prospects
D Martijn O Pruissen1, L Jaap Kappelle, Frits R Rosendaal
1Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands.
Cerebrovascular Diseases (Basel, Switzerland)
|February 10, 2009
Summary
Replication failure in ischaemic stroke genetic studies is common. This review explores reasons like small sample size and publication bias, offering solutions for better study design.
Area of Science:
- Genetics
- Neurology
- Epidemiology
Background:
- Hundreds of genetic association studies for ischaemic stroke have yielded inconsistent results.
- Replication failure erodes confidence in genetic findings for stroke.
- Potential reasons include false positives/negatives and methodological variations.
Purpose of the Study:
- To review common causes of replication failure in ischaemic stroke genetic association studies.
- To discuss strategies for addressing these challenges.
- To provide recommendations for optimizing future study designs.
Main Methods:
- Literature review of genetic association studies in ischaemic stroke.
- Analysis of factors contributing to inconsistent findings.
- Synthesis of methods to improve study design and reduce bias.
Main Results:
- Key issues identified include small sample sizes, multiple testing, and publication bias.
- Methodological heterogeneity across studies complicates interpretation.
- Addressing these factors is crucial for advancing genetic research in stroke.
Conclusions:
- Improving the reliability of genetic association studies in ischaemic stroke requires careful consideration of study design.
- Recommendations focus on stroke subtype classification, candidate pathways, and subgroup analyses.
- Enhanced study designs can increase the potential clinical impact of genetic discoveries.
Related Concept Videos
01:11Genome-wide Association Studies-GWAS
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
01:29Pharmacogenomics: Identification of New Drug Targets
Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
01:15Ischemic Stroke ll: Pathophysiology
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
01:15Ischemic 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.