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Self-Assembled Collagen Microparticles by Aerosol as a Versatile Platform for Injectable Anisotropic Materials.
Small ( IF 13.0 ) Pub Date : 2019-12-27 , DOI: 10.1002/smll.201902224
Milena Lama 1, 2 , Francisco M Fernandes 1 , Alba Marcellan 2 , Juliette Peltzer 3 , Marina Trouillas 3 , Sébastien Banzet 3 , Marion Grosbot 3 , Clément Sanchez 1 , Marie-Madeleine Giraud-Guille 1 , Jean-Jacques Lataillade 3 , Bernard Coulomb 4 , Cédric Boissière 1 , Nadine Nassif 1
Affiliation  

Extracellular matrices (ECM) rich in type I collagen exhibit characteristic anisotropic ultrastructures. Nevertheless, working in vitro with this biomacromolecule remains challenging. When processed, denaturation of the collagen molecule is easily induced in vitro avoiding proper fibril self-assembly and further hierarchical order. Here, an innovative approach enables the production of highly concentrated injectable collagen microparticles, based on collagen molecules self-assembly, thanks to the use of spray-drying process. The versatility of the process is shown by performing encapsulation of secretion products of gingival mesenchymal stem cells (gMSCs), which are chosen as a bioactive therapeutic product for their potential efficiency in stimulating the regeneration of a damaged ECM. The injection of collagen microparticles in a cell culture medium results in a locally organized fibrillar matrix. The efficiency of this approach for making easily handleable collagen microparticles for encapsulation and injection opens perspectives in active tissue regeneration and 3D bioprinted scaffolds.

中文翻译:

气溶胶的自组装胶原蛋白微粒作为可注射各向异性材料的多功能平台。

富含I型胶原的细胞外基质(ECM)表现出特征性的各向异性超微结构。然而,用这种生物大分子进行体外工作仍然具有挑战性。当加工时,容易在体外诱导胶原分子的变性,从而避免适当的原纤维自组装和进一步的等级顺序。在这里,由于采用了喷雾干燥工艺,一种创新的方法可以基于胶原分子的自组装来生产高度浓缩的可注射胶原蛋白微粒。通过对牙龈间充质干细胞(gMSCs)的分泌产物进行封装来显示该过程的多功能性,由于其在刺激受损ECM再生方面的潜在效率,被选作生物活性治疗产品。将胶原微粒注射到细胞培养基中产生局部组织的原纤维基质。这种方法用于制造易于处理的胶原蛋白微粒以进行封装和注射的效率,为主动组织再生和3D生物打印支架提供了前景。
更新日期:2020-01-29
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