中药复方制剂骨科敷药对尺桡骨干骨折患者骨代谢的影响

目的探讨中药复方制剂骨科敷药对尺桡骨干骨折患者骨代谢的影响.方法选择46例闭合性尺桡骨干骨折住院患者为研究对象,分为治疗组(23例)和对照组(23例),观察骨科敷药对尺桡骨干骨折后患者骨代谢的改善情况.结果骨科敷药治疗组能够有效缓解骨折患者的肿胀、疼痛症状,在治疗周期内能够显著提高患者血清骨钙素和碱性磷酸酶水平,降低D-二聚体水平(P0.05),但对血清钙水平的影响无统计学意义.结论骨科敷药可以通过调节骨折患者的骨代谢而发挥促进骨折愈合的作用,同时通过降低血清D-二聚体水平而发挥抗凝血的活性.     

羟基磷灰石陶瓷诱导成骨细胞的研究

通过定量检测在羟基磷灰石(HA)表面生长的成骨细胞骨涎蛋白和骨钙蛋白的表达,研究了羟基磷灰石陶瓷对成骨细胞的影响．研究结果表明,随着成骨细胞培养时间的延长,在羟基磷灰石表面生长的成骨细胞骨钙蛋白和骨涎蛋白的表达量相对于对照组有显著增加．由于骨钙蛋白和骨涎蛋白是成骨细胞分化晚期高度表达的两种标志性蛋白质,因此其表达量的显著提高意味着羟基磷灰石陶瓷可以诱导成骨细胞的成熟。这一结果可进一步为理解HA陶瓷的生物相容性和生物活性提供分子生物学依据。     

Calcium carbonate nanoparticles promote osteogenesis compared to adipogenesis in human bone-marrow mesenchymal stem cells

Rhombohedron-like and fusiform calcium carbonate nanoparticles were fabricated using a new method. Their geometry was controlled by varying the mixing speed and ratio of ethanol versus water in reaction system. The calcium carbonate nanoparticles(CCNPs) have slight effect on viability of human bone-marrow mesenchymal stem cells(hBMSCs) with dose-dependent and shape-dependent, but they can significantly promote osteogenic differentiation of hBMSCs in vitro by 10–37% increase of alkaline phosphatase(ALP) activity, 9–36% growth of collagen secretion and 1.13–1.83 folds upregulation of osteogenesis-related genes, even at lower dose ranges(5–20 μg/ml). The efficacity of promoting osteogenesis depends on the shape and dose of CCNPs. Furthermore,adipogenesis was inhibited by less accumulation of lipid droplets, lower triglyceride(TG) secretion and downregulation of adipogenesis-related genes. These findings improve the understanding of effects CCNPs on hBMSCs fate towards osteoblasts or adipocytes and have meaningful impact for combining use of CCNPs and hBMSCs in tissue engineering and regenerative medicine fields.     

体外培养大鼠颅骨成骨细胞的生物学特性

应用机械和多步酶解的方法，从新生大鼠颅骨分离成骨细胞。偶氮染色法和钙钴法证明细胞的碱性磷酸酶活性呈阳性反应；Ｖｏｎ Ｋｏｓｓａ和钙分子探针Ｆｌｕｏ－３染色显示细胞节内有钙的沉积；电镜和倒置相差显微镜观察可见矿化结节及其形成过程；碱性磷酸酶性活性和骨钙素的动态分析提示这两种蛋白因子与成骨细胞分化与成熟的相关性。这一体外培养方法的建立，为骨的发育和成骨细胞生物学的研究提供了模型。