Biofabrication and testing of a fully cellular nerve graft.

Biofabrication and testing of a fully cellular nerve graft.
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全细胞神经移植物的生物制作和测试。

DOI:
10.1088/1758-5082/5/4/045007
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发表时间:
2013-12
期刊:
影响因子:
9
通讯作者:
Heesch CM
Heesch CM
中科院分区:
工程技术1区
文献类型:
--
作者:
Owens CM;Marga F;Forgacs G;Heesch CM

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神经断裂是一种衰弱的损伤,会对个人的生活质量造成毁灭性的后果。修复的黄金标准是使用自体移植物来桥接切断的神经末梢。然而,这种修复由于供体部位的二次手术而存在风险,并可能导致发病率和感染。因此,临床修复方法通常涉及非细胞溶液,即由合成或天然材料组成的移植物。在这里,我们报道了一种完全由细胞和细胞分泌材料组成的完全生物移植物的生物富集化的新方法。为了重现和可靠地建立这样的复合几何移植物,我们使用生物打印。我们在大鼠坐骨神经损伤模型上测试了我们的移植物的运动和感觉功能。特别是,我们通过测量复合动作电位(运动功能)和电刺激躯体加压反射引起的平均动脉血压的变化,比较了生物加厚移植物与自体移植物和中空胶原管移植物的再生能力。我们的结果提供了证据,证明生物打印是一种很有前途的神经移植物制作方法,因此也是神经再生的结果。
Rupture of a nerve is a debilitating injury with devastating consequences for the individual’s quality of life. The gold standard of repair is the use of an autologous graft to bridge the severed nerve ends. Such repair however involves risks due to secondary surgery at the donor site and may result in morbidity and infection. Thus the clinical approach to repair often involves non-cellular solutions, grafts composed of synthetic or natural materials. Here we report on a novel approach to biofabricate fully biological grafts composed exclusively of cells and cell secreted material. To reproducibly and reliably build such grafts of composite geometry we use bioprinting. We test our grafts in a rat sciatic nerve injury model for both motor and sensory function. In particular we compare the regenerative capacity of the biofabricated grafts with that of autologous grafts and grafts made of hollow collagen tubes by measuring the compound action potential (for motor function) and the change in mean arterial blood pressure as consequence of electrically eliciting the somatic pressor reflex. Our results provide evidence that bioprinting is a promising approach to nerve graft fabrication and as a consequence to nerve regeneration.
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