3d打印纳米羟基磷灰石/聚(乳酸-羟基乙酸)脂肪源间充质干细胞支架增强骨缺损大鼠骨再生

IF 2.3 4区 医学 Q3 ENGINEERING, BIOMEDICAL
Hai Yan, Fei Xia
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引用次数: 0

摘要

三维(3D)打印在医疗领域具有巨大的潜力,包括骨组织工程支架。在我们的研究中,构建了3d打印的聚乳酸-羟基乙酸(PLGA)/纳米羟基磷灰石(HA)支架,携带脂肪源性间充质干细胞(ADMSCs),并研究了这种支架是否具有骨缺损的治疗潜力。体外实验中,将大鼠ADMSCs植入空白细胞孔(blank)、PLGA/nHA和ADMSCs/PLGA/nHA支架。通过calcein-AM/PI染色和CCK-8法检测ADMSCs的活力和增殖,评估支架的生物相容性。三组ADMSCs在成骨诱导培养基中培养,分别于7天和21天后进行ALP和ARS染色。RT-qPCR检测ADMSCs中Runx2、Osterix、OCN和OPN mRNA的表达。体内实验采用PLGA/nHA支架或ADMSCs/PLGA/nHA支架植入大鼠桡骨缺损模型,并于植入后第12周进行显微ct扫描分析。采用H&E和免疫组化染色分别评价大鼠桡骨组织骨髓细胞形成和Runx2的表达。结果表明,ADMSCs/PLGA/nHA支架为移植细胞提供了稳定的载体,维持了细胞的活性,促进了细胞的增殖。ADMSCs/PLGA/nHA促进ADMSC体外成骨分化。此外,在桡骨缺损大鼠模型中,ADMSCs/PLGA/nHA支架的植入改善了骨再生,增强了骨髓细胞的形成,增加了Runx2的表达。综上所述,3d打印ADMSCs/PLGA/nHA支架可有效促进ADMSC成骨分化,并表现出显著的骨修复效果,提示其治疗骨缺损的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
3D-printed nano-hydroxyapatite/poly(lactic-co-glycolic acid) scaffolds with adipose-derived mesenchymal stem cells enhance bone regeneration in rat model of bone defects.

Three-dimensional (3D) printing has huge potential in the medical field, including bone tissue engineering scaffolds. In our study, the 3D-printed poly (lactic-co-glycolic acid) (PLGA)/nano-hydroxyapatite (HA) scaffolds carrying adipose-derived mesenchymal stem cells (ADMSCs) were constructed, and whether such scaffolds have therapeutic potential in bone defects was investigated. For in vitro assays, rat ADMSCs were implanted into blank cell wells (Blank) and PLGA/nHA and ADMSCs/PLGA/nHA scaffolds. The vitality and proliferation of ADMSCs were detected through calcein-AM/PI staining and CCK-8 assay to assess the biocompatibility of the scaffolds. ADMSCs in three groups were incubated in osteogenic induction medium, and ALP and ARS staining were performed after 7 days and 21 days, respectively. Runx2, Osterix, OCN, and OPN mRNA expression in ADMSCs was detected through RT-qPCR. For in vivo assays, rat models of radius defects were implanted by PLGA/nHA scaffolds or ADMSCs/PLGA/nHA scaffolds, and micro-CT scan analysis was conducted at week 12 after implantation. Bone marrow cell formation and Runx2 expression in rat radius tissues were evaluated through H&E and immunohistochemical staining, respectively. The results showed that ADMSCs/PLGA/nHA scaffolds provided transplanted cells with a stable carrier as well as maintained their activity and facilitated their proliferation. ADMSCs/PLGA/nHA promoted ADMSC osteogenic differentiation in vitro. Besides, the implantation of ADMSCs/PLGA/nHA scaffolds improved bone regeneration, enhanced bone marrow cell formation, and increased Runx2 expression in rat models of radius defects. Collectively, the 3D-printed ADMSCs/PLGA/nHA scaffolds effectively promote ADMSC osteogenic differentiation and exhibit significant bone repair effects, suggesting its therapeutical potential for bone defects.

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来源期刊
Journal of Biomaterials Applications
Journal of Biomaterials Applications 工程技术-材料科学:生物材料
CiteScore
5.10
自引率
3.40%
发文量
144
审稿时长
1.5 months
期刊介绍: The Journal of Biomaterials Applications is a fully peer reviewed international journal that publishes original research and review articles that emphasize the development, manufacture and clinical applications of biomaterials. Peer-reviewed articles by biomedical specialists from around the world cover: New developments in biomaterials, R&D, properties and performance, evaluation and applications Applications in biomedical materials and devices - from sutures and wound dressings to biosensors and cardiovascular devices Current findings in biological compatibility/incompatibility of biomaterials The Journal of Biomaterials Applications publishes original articles that emphasize the development, manufacture and clinical applications of biomaterials. Biomaterials continue to be one of the most rapidly growing areas of research in plastics today and certainly one of the biggest technical challenges, since biomaterial performance is dependent on polymer compatibility with the aggressive biological environment. The Journal cuts across disciplines and focuses on medical research and topics that present the broadest view of practical applications of biomaterials in actual clinical use. The Journal of Biomaterial Applications is devoted to new and emerging biomaterials technologies, particularly focusing on the many applications which are under development at industrial biomedical and polymer research facilities, as well as the ongoing activities in academic, medical and applied clinical uses of devices.
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