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走向3D打印可穿的岛屿嵌入结构:技术说明和初步结果

Eriselda Keshi1, Peter Tang1, Tobias Lam2

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概括

这项研究开发了一种3D打印的小岛嵌入结构,用于1型糖尿病治疗的血管通道. 与内皮原生细胞共同培养的人类小岛成功移植,为未来的小岛移植疗法显示出希望.

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通过3D打印打印3D打印.它们具有解性 (anastomosability).岛屿嵌入结构 岛屿嵌入结构岛屿移植移植小岛移植透气性可以透气.血栓发生性 血栓发生性

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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.
  • 血管工程 血管工程

背景情况:

  • 通过小岛移植治疗的1型糖尿病 (T1DM) 治疗面临着长期移植和利基重建的挑战.
  • 目前的小岛嵌入结构 (IES) 通常仅限于皮下植入,阻碍了血管整合.
  • 3D打印提供了一种新的方法来创建复杂的IES,以改善血管化.

研究的目的:

  • 开发和评估一个3D打印的小岛嵌入结构 (IES) 与一个集成的血管系统,用于潜在的T1DM治疗.
  • 在一个人性化的模型中评估3D打印IES的血液兼容性,解性和移植潜力.
  • 调查与内皮原生细胞共同培养在IES内的小岛生存和移植中的作用.

主要方法:

  • 使用3D打印与生物相容的凝甲基酸盐油墨制造了一个概念验证IES,具有分支的血管通道和中央小岛腔.
  • 一个定制的生物反应器被设计为在生理条件下进行无菌播种和 perfusion 实验.
  • 在IES中测试了血红相容性,接强度和解能力. 使用与人类内皮细胞 (huEPCs) 共同培养的老鼠小岛和随后的人类小岛进行了植入评估.

主要成果:

  • 在3D打印的IES中,在一个ex vivo perfusion模型中,通过袖口异位形成,证明了血液兼容性和异位可移性.
  • 虽然单独的老鼠小岛在结构中无法存活3天,但与huEPCs共同培养的人类小岛在同一时间内成功移植.
  • 血管通道可以用内皮细胞播种,结构支持与huEPCs共同培养人类小岛.

结论:

  • 成功构建了一个3D打印的IES,具有血液相容和潜在的可解剖的血管通道.
  • 与像huEPCs这样的护理细胞共同培养对于成功地在3D打印领域内植入人类小岛至关重要.
  • 需要进一步优化,以克服这种3D打印岛屿嵌入技术临床翻译的局限性.