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Related Concept Videos

Measurement of Bioavailability: Pharmacodynamic Methods01:20

Measurement of Bioavailability: Pharmacodynamic Methods

Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
Measurement of Bioavailability: Pharmacokinetic Methods01:30

Measurement of Bioavailability: Pharmacokinetic Methods

Pharmacokinetics is a vital branch of pharmacology that examines how drugs are absorbed, distributed, metabolized, and excreted by the body. Two key methodologies in pharmacokinetics are plasma drug concentration studies and urinary drug excretion analyses, both of which provide critical insights into a drug's therapeutic efficacy and bioavailability.Plasma Drug Concentration-Time StudiesPlasma drug concentration-time studies involve analyzing blood samples at specific intervals to quantify...
Bioavailability Study Design: Absolute Versus Relative Bioavailability01:27

Bioavailability Study Design: Absolute Versus Relative Bioavailability

Bioavailability is a crucial pharmacokinetic parameter that quantifies the proportion of an administered drug that reaches the systemic circulation and is available for therapeutic action. Regulatory agencies mandate the assessment of bioavailability, typically measured as the area under the drug plasma concentration-versus-time curve (AUC), to ensure the efficacy and safety of pharmaceutical products. These evaluations are categorized as absolute and relative bioavailability studies.Absolute...
Bioavailability Study Design: Healthy Subjects Versus Patients01:15

Bioavailability Study Design: Healthy Subjects Versus Patients

Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...
Bioavailability Study Design: Single Versus Multiple Dose Studies01:11

Bioavailability Study Design: Single Versus Multiple Dose Studies

Bioavailability studies are essential for understanding how a drug is absorbed, distributed, metabolized, and excreted in the body. These studies assess the extent and rate at which the active pharmaceutical agent becomes available at the site of action. The design of bioavailability studies can involve single-dose or multiple-dose regimens, each with distinct advantages and limitations.Single-dose studies are the preferred approach due to their simplicity and reduced drug exposure for...
Dosage Regimen Designs: Nomograms and Tabulations01:23

Dosage Regimen Designs: Nomograms and Tabulations

Nomograms and tabulations are vital tools used by clinicians to design accurate and individualized dosage regimens. These instruments provide a straightforward method for adjusting dosages based on individual patient characteristics, including age, weight, and physiological condition. The foundation of a drug's nomogram is population pharmacokinetic data collected and analyzed using specific models. This data simplifies complex equations, presenting them diagrammatically or tabularly for easy...

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Related Experiment Video

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Quantification of Macronutrients Intake in a Thermogenetic Neuronal Screen using Drosophila Larvae
07:24

Quantification of Macronutrients Intake in a Thermogenetic Neuronal Screen using Drosophila Larvae

Published on: June 11, 2020

Quantifying diet for nutrigenomic studies.

Katherine L Tucker1, Caren E Smith, Chao-Qiang Lai

  • 1Department of Health Sciences, Northeastern University, Boston, MA 02115, USA. kl.tucker@neu.edu

Annual Review of Nutrition
|May 7, 2013
PubMed
Summary
This summary is machine-generated.

Nutrigenomics offers personalized nutrition, but current dietary assessment methods are inadequate for gene-nutrient studies. Improved individual-level dietary intake measurement is crucial for advancing personalized nutrition and health insights.

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Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans
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Quantification of Information Encoded by Gene Expression Levels During Lifespan Modulation Under Broad-range Dietary Restriction in C. elegans

Published on: August 16, 2017

Area of Science:

  • Nutrigenomics
  • Personalized Nutrition
  • Dietary Assessment

Background:

  • Nutrigenomics research holds promise for understanding diet-health interactions and enabling personalized nutrition advice.
  • Advances in genomic and biological measurement technologies contrast sharply with the limitations of current dietary intake assessment methods.
  • Existing dietary assessment tools have significant limitations, particularly in large, multiethnic studies investigating gene-nutrient interactions.

Purpose of the Study:

  • To highlight the inadequacy of current dietary intake assessment methods in the context of nutrigenomics research.
  • To emphasize the need for valid, individual-level dietary intake data for gene-nutrient interaction studies.
  • To call for the development of improved methods for measuring usual dietary intake across diverse populations.

Main Methods:

  • Review of current dietary intake assessment methodologies and their limitations.
  • Analysis of the challenges posed by gene × nutrient interactions in large-scale studies.
  • Identification of the need for unbiased, individual-level dietary data.

Main Results:

  • Current dietary assessment methods are insufficient for capturing the precise individual nutrient intakes required for nutrigenomics.
  • Limitations of existing methods are exacerbated in complex gene × nutrient interaction studies.
  • Statistical adjustments primarily benefit population-level estimates, not individual-level data accuracy.

Conclusions:

  • A significant gap exists in the ability to accurately measure individual dietary intake for nutrigenomics.
  • Development of a new, unbiased method for direct measurement of individual usual dietary intake is urgently required.
  • Advancing personalized nutrition and understanding gene-diet interactions necessitates improved dietary assessment tools.