来自细胞外基质的组织工程心肌贴片提供区域机械功能
Paul V Kochupura1, Evren U Azeloglu, Damon J Kelly
1Department of Surgery, Stony Brook University, Stony Brook, New York, USA.
Circulation
|September 15, 2005
概括
细胞外矩阵 (ECM) 心肌贴片改善了区域性心脏功能,并显示了心肌细胞再生,与达克隆贴片不同. 这种组织工程支架为心肌修复提供了卓越的机械效益.
科学领域:
- 生物材料科学 生物材料科学
- 心血管研究研究心血管研究
- 组织工程是组织工程.
背景情况:
- 细胞外基质 (ECM) 作为组织工程支架,促进心肌细胞在心肌植入后再生.
- 达克龙是一种用于手术修复中的心肌贴片的常规材料.
- 来自ECM的补丁可能比达克龙具有机械优势.
研究的目的:
- 在狗模型中,比较ECM衍生的心肌贴片与Dacron贴片的机械和功能益处.
- 评估ECM贴片在心脏组织修复中的再生潜力.
主要方法:
- 用ECM或Dacron补丁修复的右心室缺陷的狗模型.
- 在8周评估全球和区域的缩和腹缩功能.
- 组织学评估,包括免疫组织化学,以确定心肌细胞透.
主要成果:
- 在ECM和达克伦组之间,总体缩和腹缩功能是可比的.
- 与Dacron.com相比,ECM贴片显示区域缩功能 (缩区域收缩) 显著改善.
- 在ECM贴片中,区域性透析功能 (回收率) 和心肌细胞的存在增强,而达克隆植入物中没有这种情况.
结论:
- 来自ECM的心肌贴片在植入后8周提供区域性机械效益,归因于心肌细胞重新填充.
- 这些发现凸显了ECM贴片在心肌修复方面比传统的Dacron贴片更高的疗效.
相关概念视频
01:58Mechanical Protein Functions
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.
01:58Mechanical Protein Function
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.