Proinflammatory gene polymorphisms and ischemic stroke

Yoshiji Yamada1, Sahoko Ichihara, Tamotsu Nishida

  • 1Department of Human Functional Genomics, Life Science Research Center, Mie University, Tsu, Mie, Japan. yamada@gene.mie-u.ac.jp

Insights

Identifying genetic biomarkers for stroke risk is crucial. This review focuses on proinflammatory genes and chromosomal region 9p21.3, highlighting their role in ischemic stroke susceptibility.

Area of Science:

  • Genetics
  • Neurology
  • Cardiovascular Science

Background:

  • Stroke is a leading cause of death and disability globally.
  • Genetic factors contribute to stroke susceptibility, but specific genes remain largely unidentified.
  • Vascular inflammation is a key mechanism in atherosclerosis and may play a role in ischemic stroke pathogenesis.

Purpose of the Study:

  • To review candidate genes implicated in ischemic stroke through linkage and association studies.
  • To highlight the role of proinflammatory genes (LTA, IL6, ALOX5AP) and the 9p21.3 chromosomal region in ischemic stroke.
  • To provide insights into the function of these genes and the genetic factors influencing ischemic stroke development.

Main Methods:

  • Review of linkage analyses and genome-wide association studies (GWAS) for stroke susceptibility genes.
  • Detailed examination of studies investigating polymorphisms in proinflammatory genes (LTA, IL6, ALOX5AP).
  • Analysis of research on the 9p21.3 chromosomal region as a stroke and coronary heart disease susceptibility locus.

Main Results:

  • Several candidate genes and loci have been implicated in ischemic stroke predisposition.
  • Polymorphisms in proinflammatory genes LTA, IL6, and ALOX5AP are associated with ischemic stroke risk.
  • The 9p21.3 chromosomal region is a significant susceptibility locus for both coronary heart disease and ischemic stroke.

Conclusions:

  • Proinflammatory genes and specific genetic loci like 9p21.3 are important in the genetic susceptibility to ischemic stroke.
  • Further research into these genetic factors can enhance stroke risk prediction and inform therapeutic interventions.
  • Understanding the genetic basis of stroke is vital for developing effective preventative strategies.

Related Concept Videos

Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

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...
Ischemic Stroke ll: Pathophysiology01:15

Ischemic 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...
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.
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: 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...
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase

Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
Pharmacogenetics of Drug Metabolism: Overview01:27

Pharmacogenetics of Drug Metabolism: Overview

Genetic polymorphism in drug metabolism is crucial to the inter-individual variability observed in drug responses. Drug metabolism primarily involves the chemical modification of drugs and other xenobiotics to enhance their elimination by increasing their polarity. Two main classes of enzymes mediate this biotransformation process: Phase I enzymes, primarily cytochrome P450s, catalyze oxidation and reduction reactions, while other enzymes, such as esterases, mediate hydrolysis, and Phase II...