珍珠层/聚乳酸人工骨的生物相容性研究

目的：研究珍珠层／聚乳酸人工骨在体内外的生物相容性。方法：将珍珠层／聚乳酸人工骨在体外与兔成骨细胞复合培养作实验组，以脱钙骨／聚乳酸人工骨作对照，行MTT法、组织学和扫描电镜检测，观察成骨细胞在材料表面的粘附、生长和增殖情况；将同种异体成骨细胞—珍珠层／聚乳酸人工骨复合植入体内，观察机体对细胞与材料的排斥反应。结果：肌法显示随培养时间的延长，细胞在材料表面不断增殖；组织学及电镜显示，在体外细胞于材料表面及孔隙中附着、生长良好，存在接触抑制现象；细胞与材料复合植入体内，珍珠层／聚乳酸组的炎性反应明显比对照组轻。结论：珍珠层／聚乳酸人工骨在体内外有良好的生物相容性。     

多孔钽金属与成骨细胞生物相容性的实验研究

[目的]研究多孔钽金属体外与成骨细胞的生物相容性。[方法]按照ISO10993-12医疗器械生物学评价标准制备多孔钽金属材料浸提液,作用于人成骨细胞系hFOB1.19,标记为实验组,并设置空白对照组;MTT法检测材料浸提液对成骨细胞生长的影响;ELISA酶联免疫吸附法检测实验组及对照组碱性磷酸酶ALP及骨钙素OCN活性;将成骨细胞与多孔钽金属共培养,扫描电镜观察成骨细胞在材料上黏附和生长情况。[结果]实验组和对照组细胞增殖曲线、ALP和OCN活性相似,差异无统计学意义(P>0.05);成骨细胞与多孔钽金属材料共培养,显现出良好的黏附和生长行为。[结论]多孔钽金属对成骨细胞生长无不良影响,且适于成骨细胞黏附、生长及分化,具有良好的生物相容性。     

珍珠层人工骨促进成骨细胞的体外成骨能力

目的：研究珍珠层人工骨对人成骨细胞体外成骨能力的影响。方法：将珍珠层人工骨、聚乳酸（对照组）与人成骨细胞共同培养，观察细胞形态、细胞活性、碱性磷酸酶（ALP）活性和基质钙化情况。结果：实验组在细胞形态、细胞活性等指标与对照组相比差异无显著性；实验组在培养7d及14d后ALP阳性细胞数多于对照组；培养21d后可观察到骨结节，对照组没有骨结节产生。结论：珍珠层人工骨可促进成骨细胞的体外成骨能力。     

体外镁合金与小鼠成骨细胞联合培养观察

[目的]观察镁合金与小鼠成骨细胞体外联合培养后，小鼠成骨细胞的活力、组织形态变化及生长扩增情况。由此验证镁合金与成骨细胞的生物相容性和骨传导特性，探讨镁合金成为一种新型骨科内置物材料的可行性。[方法]将小鼠成骨细胞体外扩增培养，并应用钙钴法及VonKossa法检测碱性磷酸酶加以验证。传代后将成骨细胞与镁合金金属片体外复合培养，细胞密度为3×10^4／ml。培养24、48、72h后，分别进行扫描电镜（SEM）、共聚焦显微镜观察细胞形态学变化及生长情况。[结果]小鼠成骨细胞体外培养后大量扩增，细胞特性稳定。与镁合金复合培养后，细胞保持良好的活性和分裂增殖能力。SEM观察：细胞粘附明显，增殖分化良好；共聚焦显微镜观察：随时间段的延长，细胞形态完整，轮廓清晰，增殖明显。[结论]镁合金与小鼠成骨细胞具有良好的生物相容性，镁合金对成骨细胞具有良好的骨传导特性。因此，镁合金成为一种新型的骨科内置物材料具有较强的可行性。     

应用活性玻璃/rhBMP2构建生物活性材料支架的相容性研究

[目的]观察BG／rhBMP2构建的三维立体材料支架的细胞相容性、组织相容性，为进一步改善材料性能提供依据。[方法]体外培养的兔成骨细胞分别与BG和BG／rhBMP2材料支架联合培养，倒置显微镜、扫描电镜观察细胞黏附情况，MTT法分析细胞增殖情况；将复合培养的两种支架材料植入兔肌袋中，同期观察复合材料及空白对照组，分别于术后2、4、8、12周来评价其组织相容性。[结果]MTT法结果显示：随着培养时间的延长，各组细胞数量都明显增加，各时间点复合材料支架组细胞数高于空白对照组，差异有显著性意义，复合材料支架BG／rhBMP2在细胞贴壁时间和细胞活性方面均较单纯支架优良；两种支架材料在体内均无明显炎症反应。[结论]BG／rhBMP2是一种具有良好生物相容性的支架材料，有望在骨组织工程中得到广泛应用。     

珍珠层人工骨促进成骨细胞的体外成骨能力

目的:研究珍珠层人工骨对人成骨细胞体外成骨能力的影响。方法:将珍珠层人工骨、聚乳酸(对照组)与人成骨细胞共同培养,观察细胞形态、细胞活性、碱性磷酸酶(ALP)活性和基质钙化情况。结果:实验组在细胞形态、细胞活性等指标与对照组相比差异无显著性;实验组在培养7d及14d后ALP阳性细胞数多于对照组;培养21d后可观察到骨结节,对照组没有骨结节产生。结论:珍珠层人工骨可促进成骨细胞的体外成骨能力。     

珍珠层人工骨促进成骨细胞的体外成骨能力

目的:研究珍珠层人工骨对人成骨细胞体外成骨能力的影响.方法:将珍珠层人工骨、聚乳酸(对照组)与人成骨细胞共同培养,观察细胞形态、细胞活性、碱性磷酸酶(ALP)活性和基质钙化情况.结果:实验组在细胞形态、细胞活性等指标与对照组相比差异无显著性;实验组在培养7d及14d后ALP阳性细胞数多于对照组;培养21d后可观察到骨结节,对照组没有骨结节产生.结论:珍珠层人工骨可促进成骨细胞的体外成骨能力.     

激光立体成形多孔钛对成骨细胞的影响及生物相容性研究

[目的]评价激光立体成形技术制备的多孔钛材料对成骨细胞生长的影响和其生物相容性。[方法]以DMEM培养液和无菌生理盐水作为浸提介质,对激光立体成形技术制备的多孔钛材料制取浸提液,并在加有此浸提液的培养基中培养成骨细胞,对照组加入等量DMEM培养液和无菌生理盐水,在倒置相差显微镜下观察细胞的生长情况;采用细胞计数试剂-8(CCK-8)法检测细胞增殖抑制情况以及黏附实验测定细胞黏附能力;对多孔钛分别进行四甲基偶氮唑蓝(MTT)法测定的细胞毒性试验、溶血试验以及短期全身毒性试验等生物相容性检测。[结果]1倒置显微镜观察显示,培养3 d后,发现成骨细胞在激光立体成形多孔钛组能够很好地粘附、生长和分化;CCK-8法和细胞黏附实验均证实,与对照组相比,激光立体成形多孔钛组中成骨细胞抑制率和黏附力均未受明显影响(P0.05);2激光立体成形多孔钛为USP毒性0级,即无细胞毒性;溶血率为3.00%,有良好的血液相容性;无短期全身毒性。[结论]采用激光立体成形技术制备的多孔钛材料有利于成骨细胞增殖,具有良好的生物相容性,在组织工程领域有着广阔的应用前景。     

异体冻干颗粒骨复合骨髓基质干细胞源性成骨细胞体外生物相容性研究

[目的]评价异体冻干颗粒骨体外生物相容性,为其作为骨组织工程支架材料的临床应用提供实验依据。[方法]4周龄SD大鼠,雌雄不限,采用全骨髓贴壁法体外培养骨髓基质干细胞(BMSCs),取生长状态良好的第3代BMSCs行成骨诱导培养并鉴定。制备异体冻干颗粒骨浸提液,将成骨诱导7d的BMSCs加入浸提液作为实验组,未加浸提液的为对照组,培养1、3、5d,采用MTT法检测异体冻干颗粒骨浸提液对细胞增殖的影响。成骨诱导7d的BMSCs按1×106/ml接种于异体冻干颗粒骨上,倒置相差显微镜、扫描电镜观察与其复合培养的细胞在材料上的生长情况;酶消化法消化复合于冻干颗粒骨上的成骨细胞,流式细胞仪检测细胞周期变化。[结果]BMSCs成骨诱导7d,ALP染色示胞浆内可见阳性蓝染颗粒,胞核呈红色。MTT法检测结果显示细胞在浸提液中生长与增殖状态良好,实验组与对照组差异无统计学意义(P0.05);倒置相差显微镜可见颗粒骨表面粘附多数成骨细胞;扫描电镜观察可见细胞在材料表面粘附、伸展并能增殖、分泌产生细胞外基质;流式细胞术检测显示,异体颗粒骨对细胞周期无影响,实验组细胞均为正常2倍体细胞。实验组与对照组差异无统计学意义(P0.05)。[结论]异体冻干颗粒骨无细胞毒性并具有良好的组织细胞相容性,为其临床应用提供了实验依据。     

异种骨与成骨细胞体外生物相容性研究

[目的]评价异种骨与成骨细胞体外生物相容性,为其在临床应用提供实验依据。[方法]将SD大鼠来源的成骨细胞分别在普通培养基和含异种骨浸提液的培养基中培养,于1、3、5、7 d用四甲基偶氮唑盐(methyl thiazolyltetrazolium,MTT)法测定吸光度值,以评价细胞的增殖情况。采用Transwell试验,在倒置相差显微镜下观察细胞的迁移情况,计算穿膜成骨细胞数量,检测成骨细胞的迁移能力。应用流式细胞仪检测细胞周期变化,以评价异种骨浸提液对成骨细胞周期的影响。[结果]成骨细胞在普通培养基和含异种骨浸提液的培养基中采用MTT检测增殖结果无显著性意义(P>0.05)。在含异种骨浸提液的培养基中,成骨细胞在Transwell中穿膜细胞数为(13.40±2.51)个/视野,对照组为(8.00±1.87)个/视野,两组差异有显著性意义(P<0.05),实验组细胞迁移数量多于对照组。流式细胞仪检测显示,异种骨浸提液对细胞周期无影响。[结论]异种骨与成骨细胞有良好的生物相容性,为其临床应用提供了试验依据。     

成骨细胞在珍珠层复合人工骨表面的粘附和增殖

目的　评价人成骨细胞在珍珠层聚乳酸人工骨上的粘附能力。方法　将珍珠层聚乳酸人工骨与人成骨细胞体外复合培养 ,采用倒置相差显微镜、扫描电镜、透射电镜及流式细胞仪检测 ,观察人成骨细胞在珍珠层聚乳酸人工骨上的粘附能力。结果　珍珠层聚乳酸人工骨与人成骨细胞体外复合培养 1周后 ,细胞通过伪足贴附于人工骨表面。透射电镜下成骨细胞形态正常 ,胞浆内有丰富的粗面内质网和线粒体 ,并可观察到细胞之间形成的连接。流式细胞仪检测结果显示 ,附着在珍珠层复合人工骨的成骨细胞增殖指数增高。结论　珍珠层复合人工骨材料有利于成骨细胞的粘附、增殖和分化     

可控微结构EBM钛合金支架与成骨细胞的体外三维复合培养

[目的]探讨可控微结构EBM钛合金支架作为成骨细胞体外培养载体的可行性,并观察载体类蜂巢状孔结构在成骨细胞培养中的作用.[方法]应用直接金属快速成形技术一电子束熔化成形(electron beam melting,EBM)过程直接构建和制备可控性微结构钛合金支架.分离培养1 d龄胎兔颅骨成骨细胞,以兔颅骨源性成骨细胞复合支架作为实验组,以单独培养的兔颅骨源性成骨细胞作为对照组.将成骨细胞与支架复合培养1、7、14 d后,进行倒置相差显微镜、扫描电镜及组织切片染色观察细胞与材料复合情况,以MTT比色法及碱性磷酸酶的定量检测研究材料结构对细胞增殖、分化的影响.[结果]成骨细胞/支架复合培养7d后,大量细胞通过伸出多个伪足粘附在支架表面以及孔周围并与支架牢固结合;培养14 d后支架表面及孔隙内有大量细胞分布,细胞伸出数个突起沿着孔隙壁逐渐向孔隙内延伸、汇集.支架上的细胞增殖、分化以及转移明显增加,与对照组比较有明显统计学差异(P<0.05).[结论]EBM钛合金支架有利于细胞的贴附、生长及增殖,并对细胞的功能无不良的影响.支架类蜂巢状孔结构能够调节成骨细胞在支架内的分布.     

丹仙康骨胶囊对培养成骨细胞影响的观察

目的：为了解补肾活血中药丹仙康骨胶囊对体外培养成骨细胞的作用。方法：应用透射电镜、MTT、对硝基苯磷酸盐法(PNPP)及骨钙素(BGP)含量放免测定法，观察丹仙康骨胶囊对成骨细胞超微结构、增殖与分化作用的影响。结果：丹仙康骨胶囊刺激(20mg／ml)的成骨细胞，ALP活性提高及骨钙素含量增多；透射电镜观察其细胞线粒体致密、游离核糖体增多、内质网丰富扩大增粗呈中等电子密度，而糖原溶解与脂肪空泡均较少。结论：丹仙康骨胶囊具有促进成骨细胞的代谢、增殖和分化的作用。     

缺氧对成人成骨细胞增殖及分化的影响

目的:在缺氧条件下体外培养成人成骨细胞,探讨缺氧对成骨细胞增殖及分化的影响。方法:将手术中取得的成人髂骨骨块,使用酶消化法进行培养,当细胞传至第2代时,建立成骨细胞缺氧模型,用MTT法观察各组成骨细胞增殖活力的变化;用骨钙素放射免疫法分别检测各组骨钙素含量;用激光共聚焦显微镜对两组培养前3 d细胞血管内皮生长因子(VEGF)光密度值作定量分析。结果:正常组细胞增殖活力较缺氧组强;缺氧组细胞VEGF的光密度值及骨钙素含量均高于正常组。结论:缺氧抑制成骨细胞增殖,缺氧(1~3 d)诱导成人成骨细胞VEGF的高表达并促进成骨细胞的分化。     

Enhancement of human osteoblast proliferation and phenotypic expression when cultured in human serum

Traditionally, culture medium is supplemented with foetal bovine serum (FBS). However, in cultures of osteoblasts intended for human re-implantation, such serum presents potential risks of foreign protein contamination and transmission of viral or prionrelated material, if used. We cultured human osteoblasts from 16 patients in 10% autologous human serum, 10% pooled human serum, 10% FBS or 2% Ultroser G. Non-synthetic sera were tested in both heat-treated and non-heat-treated forms. We determined cell growth and osteoblast phenotype. Cell proliferation in all types of human serum was significantly greater than in FBS. This was most marked in heat-treated autologous human serum. Cells cultured in Ultroser G had less proliferation than all other groups. The phenotypic tests showed that cells cultured in human and foetal bovine serum displayed an osteoblast phenotype, with greater protein expression in cells cultured in human serum. We conclude that culture of human osteoblasts in autologous human serum enhances cell proliferation, while maintaining an osteoblast phenotype. These findings have implications for the use of cultured osteoblasts in self-cell therapy. Human osteoblast growth is supported by autologous human serum, which allows re-implantation of cultured cells, while avoiding the risk of foreign protein carry-over with enhancement of cell proliferation.     

Enhancement of human osteoblast proliferation and phenotypic expression when cultured in human serum

Traditionally, culture medium is supplemented with foetal bovine serum (FBS). However, in cultures of osteoblasts intended for human re-implantation, such serum presents potential risks of foreign protein contamination and transmission of viral or prionrelated material, if used. We cultured human osteoblasts from 16 patients in 10% autologous human serum, 10% pooled human serum, 10% FBS or 2% Ultroser G. Non-synthetic sera were tested in both heat-treated and non-heat-treated forms. We determined cell growth and osteoblast phenotype. Cell proliferation in all types of human serum was significantly greater than in FBS. This was most marked in heat-treated autologous human serum. Cells cultured in Ultroser G had less proliferation than all other groups. The phenotypic tests showed that cells cultured in human and foetal bovine serum displayed an osteoblast phenotype, with greater protein expression in cells cultured in human serum. We conclude that culture of human osteoblasts in autologous human serum enhances cell proliferation, while maintaining an osteoblast phenotype. These findings have implications for the use of cultured osteoblasts in self-cell therapy. Human osteoblast growth is supported by autologous human serum, which allows re-implantation of cultured cells, while avoiding the risk of foreign protein carry-over with enhancement of cell proliferation.     

Enhancement of human osteoblast proliferation and phenotypic expression when cultured in human serum

Traditionally, culture medium is supplemented with foetal bovine serum (FBS). However, in cultures of osteoblasts intended for human re-implantation, such serum presents potential risks of foreign protein contamination and transmission of viral or prion-related material, if used. We cultured human osteoblasts from 16 patients in 10% autologous human serum, 10% pooled human serum, 10% FBS or 2% Ultroser G. Non-synthetic sera were tested in both heat-treated and non-heat-treated forms. We determined cell growth and osteoblast phenotype. Cell proliferation in all types of human serum was significantly greater than in FBS. This was most marked in heat-treated autologous human serum. Cells cultured in Ultroser G had less proliferation than all other groups. The phenotypic tests showed that cells cultured in human and foetal bovine serum displayed an osteoblast phenotype, with greater protein expression in cells cultured in human serum. We conclude that culture of human osteoblasts in autologous human serum enhances cell proliferation, while maintaining an osteoblast phenotype. These findings have implications for the use of cultured osteoblasts in self-cell therapy. Human osteoblast growth is supported by autologous human serum, which allows re-implantation of cultured cells, while avoiding the risk of foreign protein carry-over with enhancement of cell proliferation.     

成骨细胞与血管内皮细胞体外直接共同培养生物学特性观察

目的 观察骨髓间充质干细胞(BMSCs)诱导的成骨细胞和肾血管内皮细胞直接共同培养的细胞相容性,并探索两者共同培养的合适比例.方法 成骨细胞和血管内皮细胞按1:0、3:1、2:1、1:1、0:1比例分为5组直接共同培养,观察各组细胞形态并计数细胞比较增殖能力,检测碱性磷酸酶(ALP)活性,研究共同培养后成骨细胞成骨能力的改变.结果 共同培养后细胞增殖及成骨细胞ALP染色阳性率高于单一细胞培养,成骨细胞与内皮细胞按2:1比例培养优于按3:1和1:1比例培养,增殖最快,ALP阳性率最高.结论 成骨细胞和血管内皮细胞体外直接共同培养具有良好的相容性,可促进成骨细胞的增殖、分化及ALP的分泌,提高其成骨能力.两者按2:1混合是较佳比例.     

Effects of an enamel matrix derivative on human osteoblasts and PDL cells grown in organoid cultures.

OBJECTIVE: The objective of this study was to investigate cellular effects of enamel matrix derivative (EMD) in human derived, primary osteoblasts and periodontal ligament (PDL) cells grown in organoid cultures. STUDY DESIGN: Cell replication was assessed by BrdU-incorporation. [(3)H]-proline incorporation was measured to determine the synthesis of proline-containing proteins, such as collagen. In addition, calcium accumulation and alkaline-phosphatase-activity were quantified. Electron microscopy for morphological analysis was performed. RESULTS: Our results showed that EMD enhances BrdU-incorporation in PDL cells and osteoblasts. Also, in osteoblast organoid cultures [3H]-proline incorporation was 3-fold increased (P < .01). Extensive matrix deposition was noted in osteoblast cultures by electron microscopy. In osteoblasts, high levels of calcium accumulation and alkaline-phosphatase-activity were found. However, EMD did not promote mineralization. CONCLUSION: Our results indicate that under organoid culture conditions EMD is able to promote the synthesis of proline-containing proteins such as collagen but not matrix mineralization of primary human osteoblastic cells.