Colloids Surf B Biointerfaces:掺入锶的矿化PLLA纳米纤维膜,用于促进骨缺损修复

2019-04-23 不详 网络

电沉积制成的矿化支架可模仿天然骨的化学成分,由于其快速简单的生产而引起了广泛的关注。在该研究中,研究人员通过电沉积方法制备含有不同量的锶(Sr)的矿化电纺聚乳酸(PLLA)纳米纤维膜,用于骨再生。进行体外测定,包括在这些膜上生长的大鼠骨髓衍生的间充质干细胞(BMSC)的细胞增殖和成骨分化以及体内颅骨缺损修复测定。结果发现,矿物晶体可以均匀地沉积在电纺纳米纤维膜上,而形成的晶体的形态受Sr量的影响。

电沉积制成的矿化支架可模仿天然骨的化学成分,由于其快速简单的生产而引起了广泛的关注。在该研究中,研究人员通过电沉积方法制备含有不同量的锶(Sr)的矿化电纺聚乳酸(PLLA)纳米纤维膜,用于骨再生。

进行体外测定,包括在这些膜上生长的大鼠骨髓衍生的间充质干细胞(BMSC)的细胞增殖和成骨分化以及体内颅骨缺损修复测定。结果发现,矿物晶体可以均匀地沉积在电纺纳米纤维膜上,而形成的晶体的形态受Sr量的影响。通过X射线衍射(XRD)测量分析,形成的晶相明显。受Sr的掺入影响,其促使羟基磷灰石(HA)相转化为磷酸二钙(DCPD)相。在20天内监测Sr/PLLA纳米纤维膜中Sr2 +的释放,并且与不含Sr的矿化样品相比,来自Sr掺入样品的Ca2 +和PO43-的释放速率更高。体外细胞增殖实验证明矿化的Sr/PLLA纳米纤维膜可以促进BMSC增殖。此外,矿物质Sr/PLLA纳米纤维膜诱导BMSCs中的成骨分化程度高于纯PLLA和矿化PLLA,这可通过碱性磷酸酶(ALP)活性,茜素红(AR)和骨钙素(OCN)染色和成骨相关基因的表达结果来确定。更重要的是,体内颅骨缺损实验表明矿化的Sr/PLLA纳米纤维膜促进了骨再生。

总之,这些发现表明,矿化的Sr/PLLA纳米纤维膜是一种很有前景的骨组织工程材料。

原始出处:

Han X, Zhou X, et al., Strontium-incorporated mineralized PLLA nanofibrous membranes for promoting bone defect repair. Colloids Surf B Biointerfaces. 2019 Apr 6;179:363-373. doi: 10.1016/j.colsurfb.2019.04.011.

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    2019-05-20 waiwai3030
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    2019-12-12 yahu
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    2019-08-11 sunylz
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    2019-04-25 lfcmxl
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    2019-04-25 villahu
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    2019-12-07 shanyongle