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Related Concept Videos

Pharmacogenetics and Pharmacogenomics: Overview01:29

Pharmacogenetics and Pharmacogenomics: Overview

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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...
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Pharmacogenetics of Drug Metabolism: Overview01:27

Pharmacogenetics of Drug Metabolism: Overview

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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...
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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

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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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Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes01:28

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

Pharmacogenomics: Identification of New Drug Targets

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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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Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

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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...
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Collaborative Counseling Considerations for Pharmacogenomic Tests.

Heather A Zierhut1, Colleen A Campbell2,3, Allison G Mitchell4

  • 1Department of Genetics, Cell Biology, and Development, University of Minnesota Twin Cities, Minneapolis, Minnesota.

Pharmacotherapy
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Summary
This summary is machine-generated.

Pharmacogenomic (PGx) testing offers precision medicine benefits but faces implementation challenges. A multidisciplinary approach involving pharmacists and genetic counselors can overcome these obstacles for better patient care.

Keywords:
disease associationsgenetic counselingpharmacistspharmacogeneticspharmacogenomics

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Area of Science:

  • Pharmacogenomics
  • Clinical Pharmacology
  • Precision Medicine

Background:

  • Pharmacogenomic (PGx) testing is increasingly used in clinical settings.
  • Its integration into healthcare presents significant implementation and service delivery challenges.
  • PGx is a key component of precision medicine, merging genetics and pharmacology.

Purpose of the Study:

  • To describe translational considerations for providing PGx testing and counseling.
  • To review PGx test selection, patient education, and counseling models.
  • To examine ancillary risks, pediatric testing, and familial implications of PGx testing.

Main Methods:

  • Review of translational considerations in PGx service delivery.
  • Description of PGx test selection and patient education strategies.
  • Analysis of PGx service models incorporating pharmacists and genetic counselors.

Main Results:

  • Multidisciplinary models incorporating pharmacists and genetic counselors are beneficial.
  • Addressing ancillary risks, pediatric testing, and familial implications is crucial.
  • Partnerships can overcome PGx implementation obstacles.

Conclusions:

  • Multispecialty partnerships are key to overcoming PGx implementation barriers.
  • A multidisciplinary approach enhances the delivery of precision medicine through PGx testing.
  • Effective PGx service models require careful planning for patient education and counseling.