心臓の修復のための細胞外マトリックス・スキャフォールド
Keith A Robinson1, Jinshen Li, Megumi Mathison
1American Cardiovascular Research Institute, Norcross, GA, USA. krobinson@acrionline.org
Circulation
|September 15, 2005
まとめ
尿管マトリックス (UBM) パッチは,心臓発作後の心臓組織再生を促進し,心筋の修復の可能性を示しています. UBMは生物分解し,収縮性細胞に置き換えられ,合成のePTFEパッチよりも性能が優れていた.
科学分野:
- 再生医学は,再生医療である.
- バイオマテリアル科学 バイオマテリアル科学
- 心血管研究 循環器科の研究
背景:
- 心不全は大きな健康問題です.
- 組織工学による心臓パッチは,有望な治療戦略を提供します.
- 細胞外マトリックス・スキャフォールドは,心筋膜の修復のために研究されている.
研究 の 目的:
- 発作した左心室を修復するための支架として,尿道膀マトリックス (UBM) を評価する.
- 心臓パッチングの際のUBMと拡張ポリテトラフルオロエチレン (ePTFE) を比較する.
- 豚のモデルでUBMの組織応答と再生可能性を評価する.
主な方法:
- 豚 (n=42) は左心室 (LV) 梗塞を患った.
- 4層のマルチラミネートUBMまたはePTFEのパッチは,全厚のLV壁の代替品として埋め込まれました.
- 組織分析には,移植後1週間,1ヶ月,3ヶ月で組織学,免疫細胞化学,フロー細胞測定が含まれていました.
主要な成果:
- 3ヶ月後,UBMは生体吸収され,血管化された線維細胞組織とミオフィブロブラスト,およびいくつかの収縮性細胞に置き換えられました.
- UBMは1ヶ月でePTFEと比較して,アルファ滑らかな筋肉のアクチン陽性細胞を有意に多く示した (P=0.04).
- ePTFEパッチは,限られた心筋細胞マーカーとともに,異体反応,死滅,および3ヶ月後に化を示した.
結論:
- UBMの生物分解は,収縮性細胞を含む繊維細胞組織の形成に伴いました.
- UBMは,心臓のパッチングにおいて,合成のePTFEよりも優位性を示しています.
- UBMは,移植後3ヶ月で心筋膜置換の傾向を示しています.
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