配合性有機ナノシート (CONs) の標的型薬物投与は,配列的合成後の改変によるものである
Shouvik Mitra1, Himadri Sekhar Sasmal1,2, Tanay Kundu1,2
1Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory , Pune 411008, India.
Journal of the American Chemical Society
|March 4, 2017
まとめ
同価有機ナノシート (CONs) はがんに対する有望な標的薬物投与を提供します. 合成後の改変はCONを強化する
科学分野:
- 材料科学
- ナノテクノロジー
- 生物医学工学
背景:
- 協和有機ナノシート (CON) は,高表面積と安定性を有する2Dの多孔性ポリマーです.
- CONは薬物の投与の可能性を示しているが,標的の特異性には限界がある.
- これらの制限を克服し,機能性を改善するために,合成後の改変が調査されています.
研究 の 目的:
- 標的型薬物投与のための機能化された CON を開発する.
- 合成後の改変により,CONの標的特異性の限界に対処する.
- 乳がん細胞に 5- フッ素ウラシルの標的投与を証明する.
主な方法:
- 塩媒介によるコヴァレント有機フレームワーク (COF) の簡単な合成で,p-toluenesulfonic acid (PTSA) を使用しています.
- COFの連続した合成後の改変により,機能化されたCONが生成される.
- がん細胞における持続的な放出とアポトーシスの誘導のための標的型CONの評価.
主要な成果:
- コンの同時化学分層化と機能化が達成された.
- ターゲットを絞った CON は,5- フッ素ウラシルの持続的な放出を示した.
- 受容体媒介の内細胞化は,アポトーシスと癌細胞死につながった.
結論:
- 合成後の改変は,CONを使用して標的の薬物投与を可能にします.
- このアプローチは,生物医学的な応用のための簡単な合成と改善された機能を提供します.
- 開発された CON は,標的がん治療の有意な可能性を示しています.
関連する概念動画
Modified-Release Drug Delivery Systems: Site-Targeted
58
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.
58
Site-Targeted Drug Delivery Systems: Polymeric Carriers
65
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
65
Modified-Release Drug Delivery Systems: Rate-Programmed II
58
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...
58
Modified-Release Drug Delivery Systems: Rate-Programmed I
67
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,...
67
Modified-Release Drug Delivery Systems: Overview
74
Modified-release dosage forms are designed to address the limitations of drugs with short biological half-lives. These forms maintain stable therapeutic drug concentrations over extended periods, reducing the need for frequent dosing. A consistent drug level helps minimize peak-trough fluctuations, which can reduce adverse effects, lower the risk of drug resistance, and improve overall treatment effectiveness.One common type of modified-release form is the extended-release (ER) formulation. ER...
74
Modified-Release Drug Delivery Systems: Classification
129
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...
129


