Hoyer M, Drechsel N, Meyer M, Meier C, Hinüber C, Breier A, Hahner J, Heinrich G, Rentsch C, Garbe L-A, Ertel W, Schulze-Tanzil G, Lohan A
Department of Orthopaedic, Trauma and Reconstructive Surgery, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Garystrasse 5, 14195 Berlin, Germany; Department of Bioanalytics, Technische Universität Berlin Seestr. 13, 13353 Berlin, Germany.
Research Institute of Leather and Plastic Sheeting-FILK, Meißner Ring 1-5, 09599 Freiberg, Germany.
Mater Sci Eng C Mater Biol Appl. 2014 Oct;43:290-9. doi: 10.1016/j.msec.2014.07.010. Epub 2014 Jul 9.
Embroidery techniques and patterns used for scaffold production allow the adaption of biomechanical scaffold properties. The integration of collagen into embroidered polylactide-co-caprolactone [P(LA-CL)] and polydioxanone (PDS) scaffolds could stimulate neo-tissue formation by anterior cruciate ligament (ACL) cells. Therefore, the aim of this study was to test embroidered P(LA-CL) and PDS scaffolds as hybrid scaffolds in combination with collagen hydrogel, sponge or foam for ligament tissue engineering. ACL cells were cultured on embroidered P(LA-CL) and PDS scaffolds without or with collagen supplementation. Cell adherence, vitality, morphology and ECM synthesis were analyzed. Irrespective of thread size, ACL cells seeded on P(LA-CL) scaffolds without collagen adhered and spread over the threads, whereas the cells formed clusters on PDS and larger areas remained cell-free. Using the collagen hydrogel, the scaffold colonization was limited by the gel instability. The collagen sponge layers integrated into the scaffolds were hardly penetrated by the cells. Collagen foams increased scaffold colonization in P(LA-CL) but did not facilitate direct cell-thread contacts in the PDS scaffolds. The results suggest embroidered P(LA-CL) scaffolds as a more promising basis for tissue engineering an ACL substitute than PDS due to superior cell attachment. Supplementation with a collagen foam presents a promising functionalization strategy.
用于支架生产的刺绣技术和图案可使生物力学支架特性得到调整。将胶原蛋白整合到刺绣的聚丙交酯-共-己内酯[P(LA-CL)]和聚二氧杂环己酮(PDS)支架中,可刺激前交叉韧带(ACL)细胞形成新组织。因此,本研究的目的是测试刺绣的P(LA-CL)和PDS支架作为混合支架与胶原水凝胶、海绵或泡沫结合用于韧带组织工程的效果。将ACL细胞接种在未添加或添加胶原蛋白的刺绣P(LA-CL)和PDS支架上进行培养。分析细胞的黏附、活力、形态和细胞外基质合成情况。无论线的尺寸如何,接种在未添加胶原蛋白的P(LA-CL)支架上的ACL细胞会黏附并铺展在线上,而接种在PDS支架上的细胞则形成细胞簇,且较大区域仍无细胞。使用胶原水凝胶时,支架的定植受到凝胶不稳定性的限制。整合到支架中的胶原海绵层几乎未被细胞穿透。胶原泡沫增加了P(LA-CL)支架的定植,但并未促进PDS支架中细胞与线的直接接触。结果表明,由于具有更好的细胞附着性,刺绣的P(LA-CL)支架作为组织工程化ACL替代物的基础比PDS更具前景。补充胶原泡沫是一种有前景的功能化策略。