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Related Concept Videos

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...
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 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...
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...
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...
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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Multi-Gene Single Nucleotide Polymorphism Detection in Gastric Cancer Based on Ion Semiconductor Sequencing Platform
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Current progress in pharmacogenetics.

John D Blakey1, Ian P Hall

  • 1Respiratory Biomedical Research Unit, City Hospital Campus, Nottingham, UK. john.blakey@nottingham.ac.uk

British Journal of Clinical Pharmacology
|January 18, 2011
PubMed
Summary
This summary is machine-generated.

Genetic variation influences how individuals respond to drugs, leading to varied efficacy and adverse effects. Pharmacogenetics research explores these genetic links to improve drug safety and treatment outcomes.

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Area of Science:

  • Pharmacology
  • Genetics
  • Drug Metabolism

Background:

  • Inter-individual variability in drug response is a significant clinical challenge.
  • Understanding the genetic basis of drug response is crucial for personalized medicine.
  • Idiosyncratic adverse drug reactions often have an underlying genetic component.

Purpose of the Study:

  • To review the current state of pharmacogenetics research.
  • To highlight the mechanisms by which genetic polymorphisms influence drug response.
  • To discuss strategies for detecting these genetic variations and associated challenges.

Main Methods:

  • Literature review of pharmacogenetics studies.
  • Analysis of examples illustrating polymorphism influence.
  • Discussion of research methodologies for polymorphism detection.

Main Results:

  • Genetic polymorphisms significantly impact drug efficacy and toxicity.
  • Various research strategies exist for identifying relevant genetic variations.
  • Examples demonstrate the practical application of pharmacogenetics.

Conclusions:

  • Pharmacogenetics offers insights into drug response variability.
  • Further research is needed to overcome current challenges in the field.
  • Clinical implementation of pharmacogenetics can enhance patient safety and therapeutic outcomes.