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Related Concept Videos

Pharmacogenetics and Pharmacogenomics: Overview01:29

Pharmacogenetics and Pharmacogenomics: Overview

253
Pharmacogenetics and pharmacogenomics examine how genetic factors influence an individual's response to drugs. While pharmacogenetics focuses on the impact of specific genetic variants on drug effects, pharmacogenomics takes a broader approach, studying how genetic variation across populations contributes to differences in drug responses. These fields aim to explain why individuals may experience varying levels of efficacy or adverse reactions to the same medication.Variability in drug...
253
Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

138
The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
138
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

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

159
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...
159
Pharmacogenetics of Drug Metabolism: Overview01:27

Pharmacogenetics of Drug Metabolism: Overview

194
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...
194
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

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

81
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...
81
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

121
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...
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Pharmacogenomics: challenges and opportunities.

Dan M Roden1, Russ B Altman, Neal L Benowitz

  • 1Vanderbilt University, Nashville, Tennessee, USA. dan.roden@vanderbilt.edu

Annals of Internal Medicine
|November 23, 2006
PubMed
Summary

Genetic variations cause unpredictable drug responses. Pharmacogenomics aims to link genomic variability to drug response variability, personalizing medicine by overcoming current challenges.

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Area of Science:

  • Genetics
  • Pharmacology
  • Genomic Medicine

Background:

  • Drug therapy outcomes vary significantly among individuals.
  • Genetic variations in genes (e.g., metabolism, transport, targets) are a known cause of this unpredictability.
  • Pharmacogenetics studies these gene variations and their impact on drug response.

Purpose of the Study:

  • To explore the potential of pharmacogenomics in understanding and predicting variable drug responses.
  • To highlight the challenges in applying genomic information to clinical practice.
  • To emphasize the promise of personalized medicine through genomic insights.

Main Methods:

  • Review of existing literature on pharmacogenetics and pharmacogenomics.
  • Identification of key challenges in the field, including gene identification, phenotype definition, and data management.
  • Discussion of the enabling role of human genome sequencing and variant cataloging.

Main Results:

  • Genomic variability is a fundamental basis for individual differences in drug response.
  • Significant challenges impede the clinical application of pharmacogenomics.
  • Overcoming these challenges is crucial for advancing drug development and personalized treatment.

Conclusions:

  • Pharmacogenomics holds immense promise for improving drug development and enabling personalized medicine.
  • Addressing challenges in gene identification, phenotype definition, and data handling is essential.
  • Individualizing drug selection and dosage based on genomic profiles can enhance therapeutic outcomes.