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The cardiovascular tissue-reactor: a novel device for the engineering of heart valves.

机译:心血管组织反应器:一种用于心脏瓣膜工程的新型设备。

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摘要

The shortage of human donor valves and disadvantages of current mechanical and xenogenic valve grafts cause a growing demand for biologically engineered valves. We developed a bioreactor for in vitro transformation of porcine semilunar heart valves into human valves. The reactor design was optimized in order to achieve a complete removal of porcine cells by trypsinization and cellularization of the remaining matrix with human vascular cells. The physical parameters of the reactor were characterized. Based on these data, decellularization and cellularization protocols were developed and the successful application of protocols was investigated by immunhistochemistry. The resulting reactor consisted of two connectable and perfuseable modules. Heart valve structures of varying sizes could be mounted into the reactor and could be completely depopulated within 4 days by a sequence of enzymatic and mechanical treatments applied simultaneously to the valves. Complete cellularization with human cells could be achieved after optimizing the seeding design, density, and time.
机译:人类供体瓣膜的短缺以及当前的机械和异种瓣膜移植物的缺点导致对生物工程瓣膜的需求不断增长。我们开发了一种生物反应器,用于将猪半月形心脏瓣膜体外转化为人瓣膜。优化反应器设计以通过胰蛋白酶消化和用人类血管细胞将剩余基质细胞化来完全去除猪细胞。表征了反应器的物理参数。基于这些数据,开发了脱细胞和细胞化方案,并通过免疫组织化学研究了方案的成功应用。所得的反应器由两个可连接和可灌注的模块组成。可以将大小不一的心脏瓣膜结构安装到反应器中,并可以通过同时对瓣膜进行一系列酶和机械处理,在4天之内完全减少其数量。优化播种设计,密度和时间后,即可实现人细胞的完全细胞化。

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