Biomater Sci:血液预制羟基磷灰石/磷酸三钙通过调节骨免疫环境诱导异位血管化骨形成

2018-06-23 MedSci MedSci原创

成功的骨愈合很大程度上取决于血块的结构和血细胞的功能反应。尽管血块在骨生成中十分重要,但很少有研究探究了在材料介导的骨再生过程中血凝块的影响。在这项研究中,在有或没有血液预制的情况下植入骨移植替代物羟基磷灰石/磷酸三钙(HA/ TCP),以评估血凝块对材料介导的骨形成的影响。结果显示,血液预制HA/ TCP诱导异位血管化骨样结构,表明血液预制可以诱导足以HA/TCP介导骨形成的微环境。机制上来说,

成功的骨愈合很大程度上取决于血块的结构和血细胞的功能反应。尽管血块在骨生成中十分重要,但很少有研究探究了在材料介导的骨再生过程中血凝块的影响。

在这项研究中,在有或没有血液预制的情况下植入骨移植替代物羟基磷灰石/磷酸三钙(HA/ TCP),以评估血凝块对材料介导的骨形成的影响。结果显示,血液预制HA/ TCP诱导异位血管化骨样结构,表明血液预制可以诱导足以HA/TCP介导骨形成的微环境。机制上来说,或与(1)修饰纤维蛋白网络,促进MSCs募集和分化;(2)上调成骨因子BMP2调节早期骨免疫环境;(3)改善VEGF的表达和增强血管生成。这些结果表明血凝块在调节骨生成,破骨细胞生成,免疫应答和血管生成中的多方面效应。

因此,血液预制可以作为提高材料成骨能力的有价值的策略,应鼓励在植入前预制带血凝块的材料。新一代骨替代材料可以靶向调节有利的血块反应以改善骨再生。

原始出处:

Wei F, Liu G, et al., Blood prefabricated hydroxyapatite/tricalcium phosphate induces ectopic vascularized bone formation via modulating the osteoimmune environment. Biomater Sci. 2018 Jun 22. doi: 10.1039/c8bm00287h.

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    2019-05-16 sunylz
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