生物分解性ポリマー基板の上に結晶炭酸アパタイトのバイオインスピレーションによる成長
William L Murphy1, David J Mooney
1Department of Biomedical Engineering, Biologic and Materials Sciences, and Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-1078, USA. wmurphy@engin.umich.edu
Journal of the American Chemical Society
|February 28, 2002
まとめ
この研究では,表面機能群を増やすことで,ポリ (α-ヒドロキシエステル) 材料の骨のような鉱物形成を向上させました. この生体模倣的アプローチは,生物学的鉱化と,整形外科組織再生の可能性についての洞察を提供します.
科学分野:
- バイオマテリアル科学 バイオマテリアル科学
- バイオミネラライゼーション
- ポリマー化学のポリマー化学について
背景:
- 生物学的鉱化は複雑で,バイオマクロモレキュールと鉱物の相互作用が含まれています.
- これらのプロセスを理解することは,組織再生のための生体材料の開発の鍵です.
研究 の 目的:
- ポリ (α-ヒドロキシエステル) モデルシステムにおける鉱物形成を理解し,制御する.
- 生物学的鉱化に関する洞察を得るために.
- 骨科組織再生のためのバイオマテリアルを開発する.
主な方法:
- ポリマーの表面機能化は,ポリ・ラクチド・コ・グリコリド (PLG) フィルムの水解による.
- 処理されたポリマーをシミュレートされた体液 (SBF) に曝露する.
- イオン結合測定を用いた鉱物形成の分析.
主要な成果:
- 表面機能群 (カルボキシル酸,ヒドロキシル) の増加により,ポリマーの表面エネルギーが強化された.
- 異質な鉱物成長と連続した鉱物膜形成の3倍の増加が観察されました.
- 形成された鉱物は,炭酸アパタイトとして識別され,骨鉱石に似ています.
結論:
- ポリ (アルファ-ヒドロキシエステル) 材料は,バイオミメティックプロセスを用いて鉱化することができます.
- ミネラル核化は,単純な静電相互作用よりも複雑です.
- 表面機能化は,バイオミメティック鉱化を強化するための実行可能な戦略です.
関連する概念動画
Crystal Growth: Principles of Crystallization
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
Cationic Chain-Growth Polymerization: Mechanism
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...
Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
Production of Biopesticides
Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...
Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...


