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METHODS: Calvarial osteoblasts of neonate rats were cultured under conditions of normal gravity(1G) and simulated weightlessness induced by clinostat respectively. The total RNA in cells was isolated in different time points (24, 48, 72 h). Reverse transcription PCR analysis was made to examine the gene expression of α5,αv and β1 integrin subunits. Each value was normalized against that of β actin mRNA.

培养的大鼠乳鼠颅骨成骨随机分为对照组和失重组,在实验的24, 48和72 h提取细胞总RNA,进行反转录PCR,检测整合素的α5,αv和β1亚单位mRNA表达,并计算与内参照β肌动蛋白 mRNA水平的比值。

Then the cultivated chondrocytes were embedded in fibrin glue fused on spongy bone, covered with priosteal flap; the complex was used to repair the femoral trochlea osteochondral defect which size is 3mm × 4mm × 4mm made in rabbit knee joint.

在A组的每只兔子的一侧膝关节股骨滑车部人为造成3mm×4mm的骨软骨缺损,骨刀切除软骨下骨到髓腔渗血为止(厚约4mm),压迫后FG止血;取髂骨骨块,并尽可能保留松质骨,取下的骨块用PBS反复清洗,以除去血细胞,将松质骨填充在骨缺损处,松质骨面朝向关节腔,高度与周边软骨下骨齐平,把骨膜片生发层朝向关节腔,用无创伤缝合线缝合在周边的软骨或滑膜组织上;向EP管中加入1/2悬液体积的FG主体胶溶液并混匀,再与主体胶等体积的催化剂溶液一同注射入骨膜与骨块密闭的腔隙中;同理处理另一侧膝关节。B组处理与A组相比只是不加入软骨细胞;C组造成骨软骨缺损,FG覆盖创面后单纯用骨膜修复缺损。

Methods Serum containing achyranthes root was prepared, human mesenchymal stem cells were separated and amplified, MTT assay was used to access the effects of serum containing achyranthes root on human mesenchymal stem cells in vitro, alkaline phosphatase and osteocalcin were assayed to reflect the variations of stem cell differentiation, and the expression of osteogenic transcription factors with RT-PCR.

制备牛膝含药血清,分离与扩增人间充质干细胞,MTT法检测牛膝含药血清对体外培养的间充质干细胞增殖作用的影响,检测碱性磷酸酶与骨钙素以反映细胞分化水平的改变,RT-PCR检测成骨相关转录因子的表达。

The proliferation effect of eight extracts of four Urtica plants on clone MC3T3-E1 cells was examined with cell counting kit-8 (CCK-8) and alkaline phosphatase activity was also determined.

结果三角叶荨麻根的醇提物,宽叶荨麻全草的醇提物和醇提物水层过D101大孔树脂40%洗脱部分在50到200 μg/ml 的浓度下能显著促进成骨样细胞MC3T3-E1增殖。

The proliferation effect of eight extracts of four Urtica plants on clone MC3T3-E1 cells was examined with cell counting kit-8 (CCK-8) and alkaline phosphatase activity was also determined.

结果三角叶荨麻根的醇提物,宽叶荨麻全*的醇提物和醇提物水层过D101大孔树脂40%洗脱部分在50到200 μg/ml 的浓度下能显著促进成骨样细胞MC3T3-E1增殖。

BACKGROUND: Defatting is to reduce the special cell surface antigens by clearing fat and lipoprotein, so as to decrease immunological rejection, improve the biocompatibility of allograft bone, and increase osteogenic potential. However, the effect of defatting on biomechanical performance of bone remains controversial.

摘要背景:脱脂的目的在于通过清除脂肪和脂蛋白,减少特殊细胞表面抗原,以降低免疫排斥反应,改善异体骨的生物相容性,提高异体骨移植的成骨能力,但目前有关脱脂对骨生物力学性能的影响尚无统一观点。

Objective:To explore the application of the basic fibroblast growth factor combined partially demineralized allogenic bone in mandibular defects, and to study the effects of bFGF in bone formation as well as the selection of its carrier.

目的:探讨bFGF(basic fibroblast growth factor ,碱性成纤维细胞生长因子)复合部分脱矿冻干辐照异体骨在修复下颌骨缺损中的应用,研究bFGF在骨缺损修复中的成骨作用机制及其适宜载体的选择。

In the second part of this thesis. The biological process of porons HA/bBMP composite repairing experimental defect in the dog femora and monkey mandibular were investigated by the qualitative and quantitative methods. The results showed that not only were the speed and time of new bone ingrowing into the bBMP/HA composite much quicker and earlier than that of implants of HA alone, but also the quantity of new bone ingrowth into bBMP/HA composite was much higher than that of HA alone. The bone ingrowth of bBMP/HA composite at higher rate within 3 weeks. In this study, bBMP/HA promoted more active new bone formation in bone marrow tissue than did HA alone. This reveals that BMP, brought into the bone marrow with HA as a carrier, accelerates osteogenesis or osteoinduction, providing sime bone marrow cells with more differentiative potential.

论文第二部分应用定性和定量的方法,较全面地研究了HA/bBMP复合人工骨在修复狗股骨和猴下颌骨实验性缺损中的生物学过程,研究发现,新骨组织长入HA/bBMP复合人工骨的时间和速度都较单纯HA早和快,而且新骨形成量也明显高于单纯HA,HA/bBMP在挂入后早期(3周)的成骨最为活跃,自体骨髓组织可为BMP提供敏感的靶细胞,增强BMP的骨诱导效果和HA/bBMP复合人工骨的骨修复能力。

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