创建自主心脏移植的最佳生物材料
Tsukasa Ozawa1, Donald A G Mickle, Richard D Weisel
1Department of Surgery, Division of Cardiovascular Surgery, Toronto General Research Institute, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada.
Circulation
|October 2, 2002
概括
一种新的生物降解材料,PCLA,显示出对先天性心脏缺陷的修复有希望. 它支持细胞生长,并比现有材料更好地保持结构完整性,可能使自身组织贴片成为可能.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 心血管外科心血管外科
背景情况:
- 针对先天性心脏缺陷的最佳心脏移植需要自身细胞和生长潜力.
- 生物降解材料必须支持细胞的快速生长,缓慢降解,并尽量减少炎症.
研究的目的:
- 为了比较一种新型的epsilon-caprolactone-co-L-lactide海绵,用聚L-lactide织物 (PCLA) 材料强化,与凝 (GEL) 和多糖酸 (PGA) 对抗心脏组织修复.
主要方法:
- 在GEL,PGA和PCLA补丁上播种了光滑肌肉细胞 (SMC),并在体外培养.
- 评估了补丁间隙中的DNA含量和细胞生长.
- 植入了补丁来修复手术创建的右心室外流通道 (RVOT) 缺陷,并在8周内进行组织学分析.
主要成果:
- 在体外,所有贴片都支持细胞生长,GEL和PCLA的细胞透率比PGA更好.
- 在体内,与GEL和PGA相比,PCLA支架显示出显著更多的细胞透,细胞外基质沉积 (elastin),并保持结构完整性 (没有稀释或扩张).
- 所有的移植都实现了完全的内皮细胞化.
结论:
- 具有SMC种子的可生物降解材料可以修复RVOT缺陷.
- PCLA贴片在体外表现出优异的细胞透率和体内结构稳定性,没有炎症.
- 细胞种子PCLA贴片提供了一个有前途的方法,用于构建自主移植用于先天性心脏缺陷的修复.
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