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A Customized Self-Assembling Peptide Hydrogel-Wrapped Stem Cell Factor Targeting Pulp Regeneration Rich in Vascular-Like Structures.
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-28 , DOI: 10.1021/acsomega.0c01266
Xiaodan Mu 1, 2 , Lei Shi 1, 2 , Shuang Pan 1, 2 , Lina He 1, 2 , Yumei Niu 1, 2 , Xiumei Wang 3
Affiliation  

Pulp regeneration is to replace the inflamed/necrotic pulp tissue with regenerated pulp-like tissue to rejuvenate the teeth. Self-assembling peptide hydrogels RADA16-I (Ac-(RADA16-I)4-CONH2) can provide a three-dimensional environment for cells. The stem cell factor (SCF) plays a crucial role in homing stem cells. Combining these advantages, our study investigated the effects of SCF-RADA16-I on adhesion, proliferation, and migration of human dental pulp stem cells (DPSCs) and the angiogenesis of human umbilical vein endothelial cells (HUVECs). The β-sheet and grid structure were observed by circular dichroism (CD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Cytoskeleton staining, living cell staining, cell viability, cell migration, angiogenesis, and western blot assays were performed, and the results indicated that all the SCF groups were superior to the corresponding non-SCF groups in cell adhesion, proliferation, migration, and angiogenesis. RADA16-I provided a three-dimensional environment for DPSCs. Besides, the SCF promoted HUVECs to form more vascular-like structures and release more vascular endothelial growth factor A. In summary, the SCF-loaded RADA16-I scaffold improved adhesion, proliferation, and migration of DPSCs and the formation of more vascular-like structures of HUVECs. SCF-RADA16-I holds promise for guided pulp regeneration, and it can potentially be applied widely in tissue engineering and translational medicine in the future.

中文翻译:

定制的自组装肽水凝胶包裹的干细胞​​因子,目标是富含血管样结构的纸浆再生。

牙髓再生是用再生的牙髓样组织代替发炎/坏死的牙髓组织,以使牙齿恢复活力。自组装肽水凝胶RADA16-I(Ac-(RADA16-I)4 -CONH 2)可以为单元格提供三维环境。干细胞因子(SCF)在归巢干细胞中起着至关重要的作用。结合这些优势,我们的研究调查了SCF-RADA16-I对人牙髓干细胞(DPSCs)粘附,增殖和迁移以及人脐静脉内皮细胞(HUVECs)血管生成的影响。通过圆二色性(CD),扫描电子显微镜(SEM)和原子力显微镜(AFM)观察β-片层和网格结构。进行了细胞骨架染色,活细胞染色,细胞活力,细胞迁移,血管生成和蛋白质印迹试验,结果表明,所有SCF组在细胞粘附,增殖,迁移和血管生成方面均优于相应的非SCF组。RADA16-I为DPSC提供了三维环境。此外,SCF促进HUVEC形成更多的血管样结构,并释放更多的血管内皮生长因子A。总之,负载SCF的RADA16-I支架可改善DPSC的粘附,增殖和迁移以及更多的血管样形成。 HUVEC的结构。SCF-RADA16-I有望在纸浆引导下再生,并且将来有可能广泛应用于组织工程和转化医学中。
更新日期:2020-07-14
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