生物工程三层强和弹性动脉使用血液动力学等价的脉动生物反应器.
Kiyotaka Iwasaki1, Koji Kojima, Shohta Kodama
1Laboratory for Tissue Engineering and Regenerative Medicine, Brigham and Women's Hospital, Harvard Medical School. 75 Francis Street, Thorn 1327, Boston, MA 02115, USA.
Circulation
|October 10, 2008
概括
研究人员使用血管细胞和脉动生物反应器设计了一种坚固,弹性,直径小的动脉. 这种组织工程血管移植模仿本地动脉,为动脉循环应用提供了潜在的潜力.
科学领域:
- 生物医学工程 生物医学工程
- 组织工程是组织工程.
- 血管生物学 血管生物学
背景情况:
- 对于用于动脉循环的自主小直径血管移植的高需求.
- 需要坚固而弹性的工程动脉,能够承受高压和高流量.
- 研究一种用于血管组织工程的新型血液动力学等价脉动生物反应器.
研究的目的:
- 为了设计一个三层,坚固,弹性,直径小的动脉.
- 利用一种新型的脉动生物反应器来模仿生理条件.
- 评估工程血管移植的结构和机械特性.
主要方法:
- 从牛大动脉中采集内皮细胞 (ECs),光滑肌细胞 (SMCs) 和纤维细胞.
- 在管支架上使用聚甘油酸和聚烯酸板种植各自的细胞构建三层植入物.
- 在一个脉动式生物反应器中将构造物化,并逐渐增加流量和压力,持续2周.
主要成果:
- 工程血管的外观和弹性与本土动脉相似.
- 扫描电子显微镜和·维勒布兰德因子染色证实了光线的EC覆盖.
- 弹性,原蛋白,α-SMA和calponin染色证实了组织组成;与本土动脉相比,拉力测试显示了同等的最终强度和弹性特性.
结论:
- 一个强大而弹性的小直径动脉成功设计.
- 使用生理脉动生物反应器对于实现与原生相似的动脉特性至关重要.
- 这种工程血管移植对动脉重建中的临床应用具有前景.
相关概念视频
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