組織工程復(fù)合支架聚乳酸-羥基乙酸共聚物和羥基磷灰石納米粒子接種自體骨髓間充質(zhì)干細(xì)胞應(yīng)用于骨再生(英文)
[Abstract]:Objective: to treat autogenous bone marrow mesenchymal stem cells (MSCs) and bone morphogenetic protein 2 (BMP-2) by grafting hydroxyapatite (g-HA) / poly (lactic acid-glycolic acid) (PLGA) nanocomposite scaffolds. New strategies for the treatment of severe bone defects are evaluated, The histocompatibility of artificial bone, the mineralization of grafts in vivo and the healing of defect bone were studied by intramuscular transplantation. Innovation: tissue engineered bone with modified PLGA inoculated with autologous MSCs accelerates the healing of bone defect and provides a new method for the treatment of severe bone defect. Methods: PLGA and g-HA were prepared by solvent casting and particle leaching. Tissue engineering grafts were made by inoculating autologous MSCs onto g-HA/PLGA scaffold. The graft, which was cm in width, was implanted into the rabbit back muscle. The graft was removed after 8 weeks. The histocompatibility of the artificial bone was detected by scanning electron microscopy (SEM) (fig. 3a). The concentration of calcium was analyzed by X-ray energy dispersive spectroscopy (EDX). The grafts of the same length were then sawed off the radial diaphysis of the forelimb of the rabbit at 2. 0 cm, and placed at the bone defect (Fig. 4). Bone defect healing was detected by computerized radiography (CR) 8 weeks after operation (Fig. 5), and tissue structure was analyzed by histology (Fig. 6), SEM for the compatibility of artificial bone with surrounding tissues (Fig. 7). Reverse transcriptase polymerase chain reaction (RT-PCR) was used to detect the expression of II and Bmp-2 genes in the healing tissues. Conclusion: PLGA incorporation into g-HA can improve mineralization, and is beneficial to the expression of bone related genes and bone formation. The application of autologous MSCs enhanced bone formation and mineralization of PLGA scaffolds, and accelerated the absorption of the scaffolds.
【作者單位】: Department
【基金】:Project supported by the National Natural Science Foundation of China(Nos.51473164 and 51273195) the Joint Research Project of Chinese Academy of Sciences and Japan Society for the Promotion of Science(CAS-JSPS;No.GJHZ1519) the International Science and Technology Cooperation Program of China(No.2014DFG52510)
【分類號(hào)】:R318.08;R68
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