Biomaterials:邻近细胞信号传导在干细胞分化中的作用

2018-09-03 MedSci MedSci原创

可以调节可改性水凝胶的物理性质以指导干细胞分化,其作用类似于天然干细胞壁龛中细胞外基质所起的作用。然而,干细胞不依赖于基质信号,而是整合可溶性和非可溶性信号,以平衡静止、自我更新和分化。在这里,我们将高密度和低密度的人间充质干细胞(hMSCs)的单细胞悬浮液包裹在透明质酸的水凝胶中,以揭示基质和非基质介导的线索在指导干细胞反应中的作用。结果表明,在高密度(HD)培养中,hMSCs不依赖于水凝胶引导

可以调节可改性水凝胶的物理性质以指导干细胞分化,其作用类似于天然干细胞壁龛中细胞外基质所起的作用。然而,干细胞不依赖于基质信号,而是整合可溶性和非可溶性信号,以平衡静止、自我更新和分化。

在这里,我们将高密度和低密度的人间充质干细胞(hMSCs)的单细胞悬浮液包裹在透明质酸的水凝胶中,以揭示基质和非基质介导的线索在指导干细胞反应中的作用。结果表明,在高密度(HD)培养中,hMSCs不依赖于水凝胶引导进行分化。相反,hMSCs具有静止细胞的特征,并分泌响应来自邻近细胞信号的富含糖蛋白的细胞周围基质(PCM)。防止静止排除了富含糖蛋白的PCM的形成,并迫使HD培养物响应于水凝胶而分化。我们的观察可能对组织工程具有重要意义,因为相邻细胞可能与支架提供的基质线索相反。

此外,由于干细胞从静止状态激活后是最有利于再生的,我们的结果表明,包含来自邻近细胞的信号传导的离体天然样细胞可以产生临床相关的高度再生细胞。

原始出处:

Silvia A. Ferreira, Peter A. Faull, et al., Neighboring cells override 3D hydrogel matrix cues to drive human MSC quiescence. Biomaterials. 2018 Sep; 176: 13–23.

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    2019-05-16 sunylz
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