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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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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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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 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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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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Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes01:28

Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes

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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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Video Experimental Relacionado

Updated: Mar 31, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Farmacogenómica en la clínica

Mary V Relling1, William E Evans1

  • 1Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-2794, USA.

Nature
|October 16, 2015
PubMed
Resumen

Las variaciones farmacogenómicas en unos 20 genes afectan a 80 medicamentos, guiando las elecciones clínicas de medicamentos. Los esfuerzos están pasando del descubrimiento a la implementación de estrategias basadas en la evidencia para la medicina de precisión.

Área de la Ciencia:

  • Farmacogenómica
  • La genética
  • Farmacología clínica

Sus antecedentes:

  • Décadas de investigación han identificado variaciones genéticas heredadas que afectan la respuesta a los medicamentos.
  • Se sabe que aproximadamente 20 genes influyen en la eficacia y seguridad de unos 80 medicamentos.
  • Las variantes genéticas somáticas se utilizan cada vez más para guiar la selección de fármacos contra el cáncer.

Objetivo del estudio:

  • Resumir el estado actual de los conocimientos farmacogenómicos y sus aplicaciones clínicas.
  • Para resaltar la transición del descubrimiento genético a la aplicación clínica.
  • Enfatizar el papel de la farmacogenómica en el avance de la medicina de precisión.

Principales métodos:

  • Revisión de las variaciones genéticas identificadas y sus medicamentos asociados.

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  • Análisis de las prácticas clínicas actuales y estrategias de aplicación.
  • Síntesis de la evidencia que apoya la terapia guiada por farmacogenómica.

    • Principales resultados:

    • Se dispone de información farmacogenómica para aproximadamente 20 genes que afectan a 80 medicamentos.
    • Las variantes genéticas somáticas son cruciales para seleccionar terapias dirigidas contra el cáncer.
    • La aplicación clínica de la farmacogenómica es un foco creciente.

    Conclusiones:

    • La farmacogenómica es una piedra angular de la medicina de precisión.
    • Las estrategias de implementación basadas en la evidencia son esenciales para optimizar el uso de medicamentos.
    • Se necesitan esfuerzos continuos para integrar la variabilidad farmacogenómica en la práctica clínica de rutina.