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関連する概念動画

Analysis of Population Pharmacokinetic Data01:12

Analysis of Population Pharmacokinetic Data

682
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...
682
Model Approaches for Pharmacokinetic Data: Distributed Parameter Models01:06

Model Approaches for Pharmacokinetic Data: Distributed Parameter Models

242
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
242
Pharmacokinetic Models: Comparison and Selection Criterion01:26

Pharmacokinetic Models: Comparison and Selection Criterion

338
Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
338
Model Approaches for Pharmacokinetic Data: Physiological Models01:15

Model Approaches for Pharmacokinetic Data: Physiological Models

249
Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
249
Pharmacokinetic Models: Overview01:20

Pharmacokinetic Models: Overview

1.9K
Pharmacokinetic models utilize mathematical analysis to achieve a detailed quantitative understanding of a drug's life cycle within the body. They are instrumental in simulating a drug's pharmacokinetic parameters, predicting drug concentrations over time, optimizing dosage regimens, linking concentrations with pharmacologic activity, and estimating potential toxicity.
There are three primary types of models: empirical, compartment, and physiological. Empirical models, with minimal...
1.9K
Dosage Regimens: Partial Pharmacokinetic Parameters01:01

Dosage Regimens: Partial Pharmacokinetic Parameters

155
It is not uncommon for complete drug pharmacokinetic profiles to remain elusive in pharmacokinetics. This necessitates certain educated assumptions by pharmacokineticists to determine appropriate dosage regimens without comprehensive pharmacokinetic data from animal or human studies. One prevalent assumption is setting the bioavailability factor, denoted as F, to 1 or 100%. This assumption caters to the scenario where a drug doesn't achieve full systemic absorption, resulting in the patient...
155

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関連する実験動画

Updated: Jan 18, 2026

An Intestine/Liver Microphysiological System for Drug Pharmacokinetic and Toxicological Assessment
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生理学的薬物動態モデルと集団アプローチの統合:パラメータ推定のための新しいフレームワーク

Donato Teutonico1, David Marchionni2, Marc Lavielle3,4

  • 1Pharmacometrics, Translational Medicine Unit, Sanofi, Vitry-sur-Seine, France.

CPT: pharmacometrics & systems pharmacology
|January 16, 2026
PubMed
まとめ

本研究では、生理学的薬物動態(PBPK)モデルのための新しい集団法を導入し、パラメータ推定を改善し、計算時間を短縮します。このアプローチは、個々のデータを利用してより正確な薬物動態予測を可能にすることで、創薬を強化します。

キーワード:
PBPKSAEM個体差生理学的薬物動態popPBPKpopWB‐PBPK

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関連する実験動画

Last Updated: Jan 18, 2026

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科学分野:

  • 薬物動態学と創薬
  • 計算生物学とバイオインフォマティクス
  • システムズ薬理学

背景:

  • 生理学的薬物動態(PBPK)モデリングは、開発中の薬物濃度を予測するために不可欠です。
  • 多数のパラメータと限られたデータのため、PBPKモデルのパラメータ推定は困難です。
  • 既存の方法では、生理学的に関連のあるパラメータにおける個体間のばらつきを効率的に推定することが困難です。

研究 の 目的:

  • パラメータ推定を強化するための新しい集団全身PBPK(popWB-PBPK)モデリングアプローチを導入すること。
  • 個々の患者データを活用して、PBPKモデルのパラメータ化とばらつき評価をより正確に行うこと。
  • 効率的なPBPKパラメータ推定のために最適化された確率的近似期待値最大化(SAEM)アルゴリズムを提示すること。

主な方法:

  • 全身PBPK(WB-PBPK)モデルと集団推定技術を組み合わせること。
  • 適応的パラメータグリッド最適化と線形補間を備えた最適化SAEMアルゴリズムを実装すること。
  • テオフィリンをケーススタディとして使用し、薬物特異的パラメータと共変量効果(例:喫煙状況)を推定すること。

主要な成果:

  • popWB-PBPKアプローチは、CYP1A2クリアランスや親油性などの薬物特異的パラメータを正確に推定します。
  • 最適化されたSAEMアルゴリズムは、標準SAEMと比較して計算実行時間を大幅に短縮します。
  • この手法は共変量効果を効果的に組み込み、その実用性を示しています。

結論:

  • 開発されたpopWB-PBPKフレームワークは、堅牢なPBPKパラメータ推定のためのアクセス可能なRパッケージ(saemixPBPK)を提供します。
  • このアプローチにより、生理学的な関連性を維持しながら、集団パラメータ、ばらつき、不確実性の同時推定が可能になります。
  • メカニズムモデリングの進歩により、個々のデータを使用したより信頼性の高い薬物動態予測が可能になります。