Biomaterials:3D打印的生物功能化支架可有效修复软骨缺损

2018-09-26 MedSci MedSci原创

虽然关节软骨缺损影响全世界数百万名青少年及成人,但由于组织的内源性再生有限以及与植入物的整合不良,关节软骨缺损的修复仍然具有挑战性。在这项研究中,我们开发了一种3D打印的聚集蛋白聚糖功能化支架,支持微裂缝释放的骨髓细胞,并证明了lapine模型中再生软骨组织质量和关节功能的巨大改善。 光学相干断层扫描(OCT)显示,与标准微骨折治疗相比,使用聚集蛋白聚糖功能化支架治疗的组中再生软骨组织的厚度

虽然关节软骨缺损影响全世界数百万名青少年及成人,但由于组织的内源性再生有限以及与植入物的整合不良,关节软骨缺损的修复仍然具有挑战性。在这项研究中,我们开发了一种3D打印的聚集蛋白聚糖功能化支架,支持微裂缝释放的骨髓细胞,并证明了lapine模型中再生软骨组织质量和关节功能的巨大改善。

光学相干断层扫描(OCT)显示,与标准微骨折治疗相比,使用聚集蛋白聚糖功能化支架治疗的组中再生软骨组织的厚度加倍。H&E染色显示,在生物活性支架的支持下,软骨层单位区域存在366±95个软骨细胞,而常规微骨折组仅显示112±26个软骨细胞。与正常的微骨折相比,我们的方法显示II型胶原的表达几乎高10倍,表明有可能克服与当前微骨折方法相关的纤维-软骨形成。此外,研究人员还在关节功能水平评估治疗效果。使用改良的Basso,Beattie和Bresnahan(BBB)量表评估迁移率。虽然缺陷对照组在整个研究过程中没有显示运动改善,但所有实验组都显示出随着时间的推移分数增加的趋势。

综上所述,目前的工作开发了一种有效的方法,通过将3D打印的治疗支架与微骨折外科手术相结合来再生关节临界缺损。该生物功能化的无细胞支架具有很大的潜力,可改善软骨再生的质量。

原始出处:

Guo T, Noshin M, et al., 3D printed biofunctionalized scaffolds for microfracture repair of cartilage defects. Biomaterials. 2018 Sep 14;185:219-231. doi: 10.1016/j.biomaterials.2018.09.022.

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    2019-08-20 sunylz
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    2018-09-28 lfcmxl
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    2018-09-26 emperor123

    学习新技术

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    2018-09-26 tw007007

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