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Modified-Release Drug Delivery Systems: Rate-Programmed II

Modified-Release Drug Delivery Systems: Rate-Programmed II

Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...

Modified-Release Drug Delivery Systems: Rate-Programmed I

Modified-Release Drug Delivery Systems: Rate-Programmed I

Rate-programmed drug delivery systems (DDS) are designed to release drugs at specific, controlled rates to maintain consistent therapeutic levels. These systems are categorized based on their release mechanisms, including dissolution-controlled DDS, diffusion-controlled DDS, and combined dissolution-diffusion-controlled DDS.In dissolution-controlled DDS, the release rate depends on the slow dissolution of the drug itself or the surrounding matrix. Drugs with inherently slow dissolution rates,...

Modified-Release Drug Delivery Systems: Classification

Modified-Release Drug Delivery Systems: Classification

Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...

Modified-Release Drug Delivery Systems: Stimuli-Activated

Modified-Release Drug Delivery Systems: Stimuli-Activated

Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...

Modified-Release Drug Delivery Systems: Site-Targeted

Modified-Release Drug Delivery Systems: Site-Targeted

Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.

Modified-Release Drug Delivery Systems: Drug Release Characteristics

Modified-Release Drug Delivery Systems: Drug Release Characteristics

Drug release from modified-release dosage forms is designed to achieve specific therapeutic effects by controlling the rate and extent of drug release. The classification of these drug release systems is based on key pharmacokinetic assumptions: drug disposition follows first-order kinetics, drug release is the rate-limiting step in absorption, and the released drug is rapidly and completely absorbed.There are four major models of drug release patterns. The first model is the slow zero-order...

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Updated: May 20, 2026

A Multilayer Microfluidic Platform for the Conduction of Prolonged Cell-Free Gene Expression

A Multilayer Microfluidic Platform for the Conduction of Prolonged Cell-Free Gene Expression

Published on: October 6, 2019

制作後の調整可能なリリース速度を持つ自己組み立ての配送プラットフォームです.

Job Boekhoven¹, Mathijs Koot, Tim A Wezendonk

¹Department of Chemical Engineering, Delft University of Technology , Julianalaan 136, 2628 BL Delft, The Netherlands.

Journal of the American Chemical Society

|July 25, 2012

まとめ

研究者らは,自己組織化分子を使用して,調節可能な薬物投与プラットフォームを開発しました. ジェラターから光分子が放出される速度は加熱時間によって制御され,これはリポソームから酵素の放出を左右する.

さらに関連する動画

Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries

Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries

Published on: September 6, 2012

High-throughput Protein Expression Generator Using a Microfluidic Platform

High-throughput Protein Expression Generator Using a Microfluidic Platform

Published on: August 23, 2012

関連する実験動画

Last Updated: May 20, 2026

A Multilayer Microfluidic Platform for the Conduction of Prolonged Cell-Free Gene Expression

A Multilayer Microfluidic Platform for the Conduction of Prolonged Cell-Free Gene Expression

Published on: October 6, 2019

Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries

Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries

Published on: September 6, 2012

High-throughput Protein Expression Generator Using a Microfluidic Platform

High-throughput Protein Expression Generator Using a Microfluidic Platform

Published on: August 23, 2012

科学分野:

バイオマテリアル科学バイオマテリアル科学
薬物の配送システムです.
ナノテクノロジーナノテクノロジー

背景:

セルフ・アセンブリング・マテリアルは,様々な用途に多用途のプラットフォームを提供します.
活性剤の放出動態を制御することは,効果的な薬剤投与に不可欠です.
酵素誘発放出システムは,酵素活性に対する正確な制御を必要とします.

研究の目的:

制作後の調整可能なリリース速度を持つ新しい配信プラットフォームを開発する.
自己組み立てのゼラータから,酵素によって誘発された光小分子の放出を調査する.
外部刺激による放出運動を制御する方法を確立する.

主な方法:

配送プラットフォームを作成するために,3つのコンポーネントの自己組み立てプロセスを利用しました.
酵素性水解に敏感な,フッ素ホルム結合ゼラターが含まれています.
特定の酵素をリポソーム内に閉じ込め,制御された加熱で放出します.
酵素の放出と,その後の放出率と相関する加熱期間.

主要な成果:

自己組み立ての配送プラットフォームを成功裏に合成しました.
ゼラターの酵素媒介による水解が実証され,光分子が放出されます.
酵素の解放のための加熱時間を変化させることで,調節可能な放出運動学を示した.
加熱の持続時間と小分子放出率の間の直接的な関係が確立されました.

結論:

新しい,調整可能な薬物投与プラットフォームが成功裏に設計されました.
放出率に対するポストプロダクション制御は,外部から誘発された酵素放出によって達成可能である.
このシステムは,正確な時間制御を必要とする高度な治療的投与アプリケーションの潜在力を秘めています.