Biomaterials:机械软骨模拟聚(PCL-PTHF尿烷)/胶原纳米纤维通过阻断NF-κB信号通路诱导软骨形成

2019-03-20 不详 网络

软骨不能自我修复,因此再生是一种很有前途的修复方法。在这里,我们开发了新的电纺纳米纤维,由聚(ε-己内酯)/聚四氢呋喃(PCL-PTHF氨基甲酸酯)和来自小牛皮(称为PC)的胶原蛋白I制成,以触发间充质干细胞(MSCs)的软骨形成分化和软骨再生。结果发现,PC纳米纤维的模量(4.3 Mpa)低于PCL-PTHF聚氨酯纳米纤维,不含小牛皮中的胶原蛋白I(称为P)(6.8 Mpa),尽管这两个值均在天

软骨不能自我修复,因此再生是一种很有前途的修复方法。在这里,我们开发了新的电纺纳米纤维,由聚(ε-己内酯)/聚四氢呋喃(PCL-PTHF氨基甲酸酯)和来自小牛皮(称为PC)的胶原蛋白I制成,以触发间充质干细胞(MSCs)的软骨形成分化和软骨再生。

结果发现,PC纳米纤维的模量(4.3 Mpa)低于PCL-PTHF聚氨酯纳米纤维,不含小牛皮中的胶原蛋白I(称为P)(6.8 Mpa),尽管这两个值均在天然软骨模量范围内(1 -10 MPa)。P和PC纳米纤维在形态和尺寸上没有显示出明显的差异。令人惊讶的是,在没有额外的软骨形成诱导剂的情况下,较软的PC纳米纤维可以比较硬的P纳米纤维更有效地诱导体外软骨形成分化和体内软骨再生。使用mRNA序列分析,我们发现PC纳米纤维通过特异性阻断NF-κB信号通路抑制炎症,在诱导软骨形成方面优于P纳米纤维。

总之,该研究结果表明,PC纳米纤维可以作为软骨再生新支架的构建模块,并为纳米纤维的机械性能对软骨再生的影响提供新的见解。

原始出处:

Tongmeng Jiang, Dan Kai, et al., Mechanically cartilage-mimicking poly(PCL-PTHF urethane)/collagen nanofibers induce chondrogenesis by blocking NF–kappa B signaling pathway. Biomaterials. 2018 Sep; 178: 281–292.

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    2020-02-19 lujian
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    2019-12-15 sunylz
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