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Related Concept Videos

Analysis of Population Pharmacokinetic Data01:12

Analysis of Population Pharmacokinetic Data

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Analysis of population pharmacokinetic data involves studying the behavior of drugs within diverse populations to understand their pharmacokinetic parameters. Traditional pharmacokinetic methods typically involve collecting samples from a few individuals and estimating these parameters. While these methods are commonly used, they have limitations in capturing the variability in drug response among individuals or heterogeneous populations. Population pharmacokinetics is employed to address these...
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Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
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A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
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Population Growth00:57

Population Growth

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Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
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Pharmacokinetics: Overview01:10

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Pharmacokinetics is a scientific discipline that focuses on the journey of a drug within the body, encompassing four key stages: absorption, distribution, metabolism, and elimination. The first stage, absorption, involves the drug's transfer into the bloodstream. Several factors dictate the extent and speed of this process. For example, the liver often metabolizes oral drugs before they reach systemic circulation, leading to only partial absorption. In contrast, intravenous (IV)...
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CYP2D6 phenotype-specific codeine population pharmacokinetics.

Oscar A Linares, Jeffrey Fudin, William E Schiesser

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    This summary is machine-generated.

    This study developed a pharmacokinetic model for codeine metabolism, revealing how genetic variations impact morphine conversion. The model aids understanding of codeine

    Keywords:
    CYP2C8CYP2D6CYP3A4clinical pharmacokineticsclinical pharmacologycodeinemorphinepharmacogeneticspharmacogenomicspopulation pharmacokinetics

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    Area of Science:

    • Pharmacology
    • Pharmacokinetics
    • Genetics

    Background:

    • Codeine metabolism and its metabolites' quantitative data are limited for prescribers.
    • Genetic polymorphisms significantly influence drug metabolism pathways.

    Purpose of the Study:

    • To develop a pharmacokinetic pathway model for codeine and its metabolites.
    • To incorporate the effects of genetic polymorphisms into the model.
    • To quantitatively understand codeine's metabolic fate.

    Main Methods:

    • Studied phenotype-specific plasma concentrations of codeine and its metabolites.
    • Developed a codeine pharmacokinetic pathway model.
    • Built a population pharmacokinetic model for codeine.

    Main Results:

    • The model accurately fitted plasma time courses of codeine and metabolites.
    • Morphine conversion from codeine varied by phenotype: 10% (poor), 40% (extensive), 51% (ultrarapid).
    • Morphine-6-glucuronide formation from morphine varied: 4% (poor), 39% (extensive), 58% (ultrarapid).

    Conclusions:

    • A population pharmacokinetic model enhances understanding of codeine pathways.
    • The model can simulate pharmacogenetic-based drug disposition.
    • Integrating pharmacogenetics, population, and clinical pharmacokinetics advances personalized dosing.