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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...
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Analyzing Platelet Subpopulations by Multi-color Flow Cytometry
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The genetics of common variation affecting platelet development, function and pharmaceutical targeting.

A D Johnson1

  • 1National Heart, Lung and Blood Institute's The Framingham Heart Study, Framingham, MA 01702, USA. johnsonad2@nhlbi.nih.gov

Journal of Thrombosis and Haemostasis : JTH
|July 26, 2011
PubMed
Summary

Common genetic variants influence human platelet function and response to anti-platelet drugs. Over 50 genetic loci have been identified, offering insights into platelet biology and potential pharmacogenetic applications.

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Area of Science:

  • Genetics
  • Hematology
  • Pharmacology

Background:

  • Traditional studies on platelet function genetics used limited candidate gene approaches.
  • Recent genome-wide scans in larger populations reveal novel genetic loci influencing platelet function.

Purpose of the Study:

  • To summarize findings on common genetic variation affecting human platelet development, function, and response to anti-platelet therapy.
  • To highlight the potential of genetic insights for pharmacogenetic applications.

Main Methods:

  • Review of candidate gene studies and genome-wide association studies (GWAS).
  • Analysis of genetic associations with platelet phenotypes across diverse populations.

Main Results:

  • Over 50 genetic loci consistently associated with platelet phenotypes have been identified in multiple populations.
  • Synergy observed between prior candidate gene findings and novel loci discovered through GWAS.
  • Several identified variants are being investigated in clinical trials for anti-platelet therapies.

Conclusions:

  • Common genetic variation is beginning to explain differences in platelet function and drug response.
  • Further research is needed to fully characterize genetic influences on platelet function and their clinical relevance.
  • Understanding platelet genetics can provide insights into intracellular signaling and novel receptors, advancing platelet biology.