シェルクロスリンクされたナノ粒子 (SCK) に結合されたバイオチン生物学的利用可能性の決定
Kai Qi1, Qinggao Ma, Edward E Remsen
1Department of Chemistry, Washington University, One Brookings Drive, Saint Louis, Missouri 63130-4899, USA.
Journal of the American Chemical Society
|May 27, 2004
まとめ
調整可能なバイオチン密度を持つシェルクロスリンクされたナノ粒子 (SCK) は,混合ミセル法を使用して作成されました. 表面バイオチンの利用可能性は,バイオチニル化ブロックコポリマー含有量が高くなると増加したが,理論的なレベル以下にとどまった.
科学分野:
- ポリマー化学のポリマー化学について
- ナノテクノロジー ナノテクノロジー
- バイオコンジュゲーションによるバイオコンジュゲーション
背景:
- シェルクロスリンクされたナノ粒子 (SCKs) は,薬物投与と診断のための多用途のプラットフォームを提供します.
- バイオチニレーションは,標的型配送および分子認識アプリケーションに不可欠です.
- 表面機能化の密度を制御することは,ナノ粒子の性能を最適化するために不可欠です.
研究 の 目的:
- 制御可能な表面利用可能なバイオチン群でSCKを合成する.
- バイオチニル化ブロックコポリマーの含有量と表面バイオチン密度の関係について調査する.
- 合成されたSCKの物理的性質とバイオチンのアクセシビリティを特徴付ける.
主な方法:
- ナノ粒子合成のための混合ミセル方法論.
- ダイナミック光散射 (DLS),原子力顕微鏡 (AFM),伝送電子顕微鏡 (TEM) を用いて特徴づけています.
- 表面バイオチンを定量化するためのアビジン/HABA競争性結合測定法と光相関スペクトロスコーピー (FCS)
主要な成果:
- 異なるバイオチン密度を持つSCKが成功して合成されました.
- 表面バイオチンの利用可能性は,バイオチニル化されたポリ (アクリル酸) -b-ポリ (メチルアクリル酸) (PAA-b-PMA) のより高い組み込みにより増加しました.
- 測定された表面バイオチン密度は,理論上の最大値の25%未満でした.
結論:
- 混合ミセルのアプローチは,SCKの調節可能な表面バイオチニレーションを可能にします.
- より高い表面バイオチン密度を達成するために,さらなる最適化が必要である.
- これらのバイオチニル化SCKは,生物医学における標的型応用の可能性を秘めています.
関連する概念動画
Bioavailability: Overview
Bioavailability refers to the proportion of an unaltered drug that, after administration, enters the systemic circulation and can be distributed to the desired action site. Factors such as gastrointestinal (GI) absorption and liver biotransformation influence the bioavailability of a drug when it is administered orally. When a drug is administered intravenously, it enters the systemic circulation directly; by definition, its bioavailability is assumed to be 100%. The bioavailability of an...
Bioavailability: Overview
Bioavailability refers to the proportion of an administered drug that reaches the systemic circulation in its active, unaltered form. It is a crucial pharmacokinetic parameter that determines the effectiveness of a drug in achieving its intended therapeutic outcomes. The route of administration significantly influences bioavailability, with intravenous administration achieving 100% bioavailability as the drug directly enters the bloodstream. In contrast, oral administration often results in...
Bioavailability: Influencing Factors
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems
Bioavailability is a critical pharmacological concept that measures the extent and rate at which an active drug ingredient or therapeutic moiety enters the systemic circulation, remaining unchanged. It's a pivotal factor in determining a drug's efficacy and safety.The Biopharmaceutics Classification System (BCS) plays an essential role in drug development by categorizing drugs into four classes based on their solubility and permeability. This classification aids in understanding drug absorption...
Bioavailability Enhancement: Drug Solubility Enhancement
Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
Bioavailability Enhancement: Drug Permeability Enhancement
After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt secretion,...


