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Related Concept Videos

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 and Pharmacogenomics: Overview01:29

Pharmacogenetics and Pharmacogenomics: Overview

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...
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...
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...
Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

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...
Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes01:28

Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes

Cytochrome P450 (CYP450) enzymes are a superfamily of heme-containing monooxygenases that play a pivotal role in Phase I drug metabolism by catalyzing oxidation and reduction reactions.These enzymes transform lipophilic xenobiotics into more hydrophilic metabolites, facilitating subsequent Phase II conjugation and eventual excretion. The CYP450 family is classified into families (e.g., CYP1–CYP3) and subfamilies (e.g., CYP2A, CYP2C), based on amino acid sequence homology.CYP450 isoenzymes,...

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Related Experiment Video

Updated: Jun 29, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
05:53

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry

Published on: June 21, 2018

Pharmacogenomics: candidate gene identification, functional validation and mechanisms.

Liewei Wang1, Richard M Weinshilboum

  • 1Division of Clinical Pharmacology, Department of Molecular Pharmacology and Experimental Therapeutics and Medicine, Mayo Medical School-Mayo Clinic, Rochester, MN 55905, USA.

Human Molecular Genetics
|October 15, 2008
PubMed
Summary

Pharmacogenetics studies how genes affect drug responses, ranging from adverse reactions to lack of efficacy. Advances in genomics provide a genome-wide view for better drug development and personalized medicine.

Related Experiment Videos

Last Updated: Jun 29, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
05:53

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry

Published on: June 21, 2018

Area of Science:

  • Genetics
  • Pharmacology
  • Genomics

Background:

  • Pharmacogenetics investigates genetic influences on drug response variability.
  • Drug response phenotypes span adverse reactions to therapeutic inefficacy.
  • The field has evolved from monogenic traits to pharmacogenomics with a genome-wide perspective.

Purpose of the Study:

  • To review the application of genome-wide techniques in pharmacogenomic studies.
  • To highlight the use of model systems in pharmacogenomics.
  • To emphasize functional validation and mechanistic insights for candidate genes.

Main Methods:

  • Application of genome-wide techniques in clinical pharmacogenomic studies.
  • Utilizing pharmacogenomic model systems (cell lines, yeast deletion libraries).
  • Functional validation of candidate genes identified through genome-wide approaches.

Main Results:

  • Genome-wide techniques are increasingly applied to clinical pharmacogenomics.
  • Model systems facilitate the study of gene function and drug response.
  • Functional validation is crucial for establishing biological plausibility of identified genes.

Conclusions:

  • Pharmacogenomics offers a genome-wide perspective on drug response.
  • Genome-wide techniques combined with functional validation enhance understanding of drug action.
  • This approach is essential for advancing personalized medicine and improving drug efficacy and safety.