阿仑膦酸钠对大鼠主动脉钙化血管组织骨保护素表达的影响

被引:0
作者
杨丽元
机构
[1] 华中科技大学
关键词
动脉钙化; 骨质疏松症; 骨保护素; 阿仑膦酸钠;
D O I
暂无
年度学位
2008
学位类型
硕士
导师
摘要
目的:研究抑制破骨细胞药物阿仑膦酸钠(alendronate,AL)对实验性大鼠主动脉钙化形成,以及对主动脉骨保护素(osteoprotegerin,OPG)表达的影响,并初步探讨其抑制动脉钙化的可能机制。 方法:27只4周龄雄性SD大鼠随机分为正常对照组、钙化造模组和AL干预组。正常对照组7只、钙化造模组10只、AL干预组10只。后两组分别给予皮下注射华法林15 mg·100g-1·12h-1,5d;维生素D3 3×105U·kg-1·24 h-1,3d;以制备大鼠主动脉钙化模型。AL组在钙化模型制备前4d给予AL 0.1mg·kg-1·24 h-1皮下注射。Von kossa染色观察主动脉钙化情况,用原子分光光度计测量钙化主动脉Ca2+含量,免疫组织化学方法检测各组大鼠主动脉OPG蛋白表达,RT-PCR检测OPG mRNA的表达。 结果:正常对照组主动脉Von Kossa染色未见黑色深染结构,钙化造模组可见主动脉中膜局灶或成片状黑色深染结构,AL干预组大鼠主动脉黑色深染结构明显减少。AL干预组主动脉Ca2+含量[(67.33±19.86)vs (114.3±23.23)μmol/g]显著低于钙化造模组(P<0.01)。RT-PCR结果显示:正常对照组主动脉内有OPG mRNA的表达,钙化造模组主动脉内OPG mRNA表达较正常对照组明显减少(P<0.05),AL干预后主动脉OPG mRNA的表达较钙化造模组显著增加(P<0.05)。免疫组化结果显示:AL干预组主动脉内OPG蛋白的表达较钙化造模组明显增加(P<0.05)。 结论:阿仑膦酸钠能增加动脉钙化血管组织OPG的表达,这可能是阿仑膦酸钠抑制动脉钙化的原因之一。
引用
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页数:37
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