3D printed step‐gradient composite hydrogels for directed migration and osteogenic differentiation of human bone marrow‐derived mesenchymal stem cells

3D printed step‐gradient composite hydrogels for directed migration and osteogenic differentiation of human bone marrow‐derived mesenchymal stem cells
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3D打印阶梯梯度复合水凝胶用于人骨髓间充质干细胞的定向迁移和成骨分化

DOI:
10.1002/nano.202100113
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发表时间:
2021
期刊:
Nano Select
影响因子:
--
通讯作者:
N. S. Kehr
N. S. Kehr
中科院分区:
--
文献类型:
--
作者:
A. Motealleh;A. Schulten;N. S. Kehr

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借助3D打印技术,我们创建了3D打印的阶梯梯度(纳米)复合支架(GradS)。GradS是通过空间连接不同的(纳米)复合水凝胶前体产生的,其浓度不同的GelMA,藻酸盐和功能性纳米材料[DexPMO-PDL =地塞米松(Dex)-和聚-d-赖氨酸(PDL)-功能化的周期性介孔有机二氧化硅(PMO)]。GradS不仅可以提高人骨髓间充质干细胞(hBM MSC)的活力,而且GradS还可用于引导hBM MSC向3D梯度多孔水凝胶网络中更高浓度的GelMA和纳米材料(NM)迁移。此外,我们证明了hBM MSC的成骨分化能力通过GelMA和DexPMO-PDL含量的增加而促进; GradS内GelMA和DexPMO-PDL浓度的增加调节了hBM MSC在3D梯度水凝胶网络内的迁移和随后的成骨分化。
With the aid of a 3D printing technique, we create a 3D printed step‐gradient (nano)composite scaffold (GradS). GradS is generated by spatially connecting different (nano)composite hydrogel precursors varying in their concentrations of GelMA, alginate, and functional nanomaterials [DexPMO‐PDL = dexamethasone (Dex)‐ and poly‐d‐lysine (PDL)‐functionalized periodic mesoporous organosilicas (PMO)]. GradS not only allows for improving the viability of human bone marrow‐derived mesenchymal stem cells (hBM MSC), but GradS is also applied to direct the migration of hBM MSC toward the higher concentration of GelMA and nanomaterials (NMs) within the 3D gradient porous hydrogel network. Furthermore, we demonstrate that the osteogenic differentiation capacity of hBM MSC is promoted by an increase in the content of GelMA andDexPMO‐PDL; increasing concentrations of GelMA andDexPMO‐PDL within the GradS regulates the migration and subsequent osteogenic differentiation of hBM MSC within the 3D gradient hydrogel network.
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