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関連する概念動画

Methods for Studying Drug Absorption: In vitro01:16

Methods for Studying Drug Absorption: In vitro

672
In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
672
Factors Influencing Drug Absorption: Physicochemical Parameters01:22

Factors Influencing Drug Absorption: Physicochemical Parameters

1.1K
The physicochemical characteristics of drugs play a crucial role in formulating stable and bioavailable drug products. The solubility of a drug, governed by the varying pH along the GI tract and its dissociation constant (pKa), is pivotal in determining its ionization state and absorption rate. Notably, weak acids and bases remain unionized and are absorbed more rapidly.
Enhanced drug absorption can be achieved by reducing particle sizes and increasing surface areas, thereby facilitating...
1.1K
One-Compartment Open Model for Extravascular Administration: First-Order Absorption Model01:15

One-Compartment Open Model for Extravascular Administration: First-Order Absorption Model

604
The first-order absorption model for extravascular administration describes the rate at which a drug is absorbed and eliminated, following the principles of first-order kinetics. This model is vital as it provides a mathematical representation of drug behavior within the body. It also allows for the prediction and interpretation of drug absorption and elimination based on the rate of change in drug concentration over time. This model can be visualized as a plasma concentration-time profile...
604
Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance01:07

Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance

338
Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
A recent model describes pravastatin's hepatobiliary excretion,...
338
Methods for Studying Drug Absorption: In situ01:09

Methods for Studying Drug Absorption: In situ

749
In situ experiments, such as the Doluisio method and Single-Pass Perfusion technique, provide critical insights into drug uptake by simulating in vivo conditions for drug absorption.
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
749
One-Compartment Open Model for Extravascular Administration: Zero-Order Absorption Model01:12

One-Compartment Open Model for Extravascular Administration: Zero-Order Absorption Model

432
Extravascular administration, such as oral or intramuscular routes, is a non-invasive drug delivery method, often preferred for ease and patient compliance. A key factor here is absorption, which dictates how quickly and effectively the drug enters the bloodstream from the administration site. Absorption follows either zero-order or first-order kinetics.
Zero-order absorption maintains a steady rate irrespective of the amount of drug left to be absorbed, making it a constant process. In the...
432

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関連する実験動画

Updated: Feb 24, 2026

Evaluation of Drug Sorption to PVC- and Non-PVC-based Tubes in Administration Sets Using a Pump
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可塑化PVCへの薬物吸収の粗視的モデリング

Meriem Sahnoune Millot1, Julien Devémy1, Philip Chennell2

  • 1Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, F-63000 Clermont-Ferrand, France.

Journal of chemical theory and computation
|February 23, 2026
PubMed
まとめ

薬物とプラスチック（PVC）デバイスとの相互作用を理解することで、医療注入中の薬物損失が減少する。この研究では、高度なシミュレーションを使用して薬物吸収をモデル化し、注入療法の安全性と有効性を向上させる。

キーワード:
薬物吸収PVC粗視的モデリング注入療法分子シミュレーション

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Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
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関連する実験動画

Last Updated: Feb 24, 2026

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Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
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Validation of Therapeutic Agent Conjugation to Polyvinyl Alcohol-Coated Medical Devices
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科学分野:

  • 計算化学および材料科学
  • 医薬品科学および薬物送達

背景:

  • 静脈内注入中の薬物損失は、薬物の吸着や医療機器への吸収によって引き起こされることが多く、重大な問題となっています。
  • 可塑化ポリ塩化ビニル（PVC）は医療機器で一般的に使用される材料ですが、薬物製剤との相互作用は分子レベルでは完全には理解されていません。
  • 既存の分子シミュレーション方法は、ポリマーにおける薬物吸収プロセスを研究するために必要な長い時間と長さのスケールを捉えることが困難です。

研究 の 目的:

  • 粗視化シミュレーションフレームワークを使用して、薬物とポリマーの相互作用の分子レベルでの理解を深めること。
  • DEHTまたはTOTM可塑剤を含む可塑化PVCマトリックス内での薬物吸収を調査すること。
  • 長い時間スケールで薬物とポリマーの相互作用をモデル化するための、転移可能な計算フレームワークを開発すること。

主な方法:

  • Martini 3粗視化フレームワークを使用して、可塑化PVCへの薬物吸収をモデル化しました。
  • 実験的な分配データに対して、溶質-水および溶質-PVCの非結合相互作用を最適化するために、トップダウンアプローチを使用して分子間相互作用を洗練しました。
  • ポテンシャル・オブ・ミーン・フォース（PMF）、ベネット受容率（BAR）、および長い平衡シミュレーションを組み合わせて、薬物吸着の熱力学的および速度論的側面を分析しました。

主要な成果:

  • 可塑化PVCマトリックス内での薬物吸収をモデル化することに成功し、根底にある分子メカニズムについての洞察を提供しました。
  • ポリマーへの薬物吸着を支配する熱力学的および速度論的パラメータの両方を定量化しました。
  • 様々な薬物-ポリマーシステムに適用可能な洗練された粗視化モデルを確立しました。

結論:

  • 開発された粗視化フレームワークは、関連する時間スケールで正確な薬物-ポリマー相互作用モデリングを可能にします。
  • このアプローチは、原子レベルのシミュレーションと注入中の薬物損失の実験的観察との間のギャップを埋めます。
  • この研究は、薬物送達を最適化するために、複雑な製剤や賦形剤を含む完全な注入システムをシミュレートための道を開きます。