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Chondrocyte-laden GelMA hydrogel combined with 3D printed PLA scaffolds for auricle regeneration
Biomaterials Advances ( IF 5.5 ) Pub Date : 2021-09-10 , DOI: 10.1016/j.msec.2021.112423
Pei Tang 1 , Ping Song 2 , Zhiyu Peng 3 , Boqing Zhang 2 , Xingyu Gui 2 , Yixi Wang 1 , Xiaoxia Liao 1 , Zhixing Chen 1 , Zhenyu Zhang 1 , Yujiang Fan 2 , Zhengyong Li 1 , Ying Cen 1 , Changchun Zhou 2
Affiliation  

The current gold standard for auricular reconstruction after microtia or ear trauma is the autologous cartilage graft with an autologous skin flap overlay. Harvesting autologous cartilage requires an additional surgery that may result in donor area complications. In addition, autologous cartilage is limited and the auricular reconstruction requires complex sculpting, which requires excellent clinical skill and is very time consuming. This work explores the use of 3D printing technology to fabricate bioactive artificial auricular cartilage using chondrocyte-laden gelatin methacrylate (GelMA) and polylactic acid (PLA) for auricle reconstruction. In this study, chondrocytes were loaded within GelMA hydrogel and combined with the 3D-printed PLA scaffolds to biomimetic the biological mechanical properties and personalized shape. The printing accuracy personalized scaffolds, biomechanics and chondrocyte viability and biofunction of artificial auricle have been studied. It was found that chondrocytes were fixed in the PLA auricle scaffolds via GelMA hydrogels and exhibited good proliferative properties and cellular activity. In addition, new chondrocytes and chondrogenic matrix, as well as type II collagen were observed after 8 weeks of implantation. At the same time, the transplanted auricle complex kept full and delicate auricle shape. This study demonstrates the potential of using 3D printing technology to construct in vitro living auricle tissue. It shows a great prospect in the clinical application of auricle regeneration.



中文翻译:

富含软骨细胞的 GelMA 水凝胶结合 3D 打印 PLA 支架用于耳廓再生

目前小耳畸形或耳外伤后耳廓重建的金标准是自体软骨移植和自体皮瓣覆盖。收获自体软骨需要额外的手术,这可能会导致供区并发症。此外,自体软骨有限,耳廓重建需要复杂的雕刻,需要出色的临床技能,非常耗时。这项工作探索了使用 3D 打印技术制造生物活性人工耳廓软骨,使用含有软骨细胞的明胶甲基丙烯酸酯 (GelMA) 和聚乳酸 (PLA) 进行耳廓重建。在这项研究中,软骨细胞被装载在 GelMA 水凝胶中,并与 3D 打印的 PLA 支架相结合,以仿生生物力学性能和个性化形状。研究了人工耳廓的打印精度个性化支架、生物力学和软骨细胞活力和生物功能。发现软骨细胞通过 GelMA 水凝胶固定在 PLA 耳廓支架中,并表现出良好的增殖特性和细胞活性。此外,在植入 8 周后观察到新的软骨细胞和软骨形成基质,以及 II 型胶原蛋白。同时,移植后的耳廓复合体保持了饱满细腻的耳廓形状。这项研究证明了使用 3D 打印技术构建体外活耳廓组织的潜力。其在耳廓再生的临床应用中显示出广阔的前景。发现软骨细胞通过 GelMA 水凝胶固定在 PLA 耳廓支架中,并表现出良好的增殖特性和细胞活性。此外,在植入 8 周后观察到新的软骨细胞和软骨形成基质,以及 II 型胶原蛋白。同时,移植后的耳廓复合体保持了饱满细腻的耳廓形状。这项研究证明了使用 3D 打印技术构建体外活耳廓组织的潜力。其在耳廓再生的临床应用中显示出广阔的前景。发现软骨细胞通过 GelMA 水凝胶固定在 PLA 耳廓支架中,并表现出良好的增殖特性和细胞活性。此外,在植入 8 周后观察到新的软骨细胞和软骨形成基质,以及 II 型胶原蛋白。同时,移植后的耳廓复合体保持了饱满细腻的耳廓形状。这项研究证明了使用 3D 打印技术构建体外活耳廓组织的潜力。其在耳廓再生的临床应用中显示出广阔的前景。移植后的耳廓复合体保持饱满细腻的耳廓形状。这项研究证明了使用 3D 打印技术构建体外活耳廓组织的潜力。其在耳廓再生的临床应用中显示出广阔的前景。移植后的耳廓复合体保持饱满细腻的耳廓形状。这项研究证明了使用 3D 打印技术构建体外活耳廓组织的潜力。其在耳廓再生的临床应用中显示出广阔的前景。

更新日期:2021-10-02
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