首页> 外文期刊>Acta biomaterialia >Synergistic interplay between human MSCs and HUVECs in 3D spheroids laden in collagen/fibrin hydrogels for bone tissue engineering
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Synergistic interplay between human MSCs and HUVECs in 3D spheroids laden in collagen/fibrin hydrogels for bone tissue engineering

机译:在胶原蛋白/纤维蛋白水凝装中的3D球体中的人体MSC和HUVEC之间的协同相互作用

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Stem cell encapsulation in hydrogels has been widely employed in tissue engineering, regenerative medicine, organ-on-a-chip devices and gene delivery; however, fabrication of native-like bone tissue using such a strategy has been a challenge, particularly in vitro, due to the limited cell loading densities resulting in weaker cell-cell interactions and lesser extra-cellular matrix deposition. In particular, scalable bone tissue constructs require vascular network to provide enough oxygen and nutrient supplies to encapsulated cells. To enhance stem cell function and generate pre-vascularized network, we here employed collagen/fibrin hydrogel as an encapsulation matrix for the incorporation of human mesenchymal stem cell/ human umbilical vein endothelial cell (MSC/HUVEC) spheroids, and investigated their cellular behavior (including cell viability, morphology, proliferation, and gene expression profile) and compared to that of cell suspension- or MSC spheroids-laden hydrogels. MSC/HUVEC spheroids encapsulated in collagen/ fibrin hydrogel showed better cell spreading and proliferation, and up-regulated osteogenic differentiation, and demonstrated pre-vascular network formation. Overall, MSC/HUVEC spheroids-laden hydrogels provided a highly suitable 3D microenvironment for bone tissue formation, which can be utilized in various applications, such as but not limited to tissue engineering, disease modeling and drug screening.
机译:水凝胶中的干细胞包封已广泛用于组织工程,再生医学,芯片器件和基因递送;然而,由于具有有限的细胞载荷密度导致细胞 - 细胞相互作用和更小的细胞间基质沉积,这种策略的制备使用这种策略的制备是一种挑战,特别是体外。特别地,可伸缩的骨组织构建体需要血管网络以提供足够的氧气和营养物供应给封装的细胞。为了增强干细胞功能并产生预血管化网络,我们在这里使用胶原/纤维蛋白水凝胶作为封装基质,用于掺入人间充质干细胞/人脐静脉内皮细胞(MSC / HUVEC)球状体,并研究其细胞行为(包括细胞活力,形态,增殖和基因表达谱),并与细胞悬浮液或MSC球状体 - 载花环水凝胶相比。胶原蛋白/纤维蛋白水凝胶中封装的MSC / HUVEC球体显示出更好的细胞扩散和增殖,上调的成骨分化,并显示出预血管网络形成。总的来说,MSC / HUVEC Spheroids-Laden水凝胶为骨组织形成提供了高度合适的3D微环境,其可用于各种应用,例如但不限于组织工程,疾病建模和药物筛选。

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