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高脂诱导动脉脂沉积时的骨构变化和镧的影响 被引量:8

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摘要 摘要 高脂饲料喂养家免两个月后,用透射电子显微镜观察其血管细胞超微结构,以扫描电子显微镜观察胫骨骨小粱的形态,用双能x线骨密度检测仪测定胫骨骨密度;同时,通过红外光谱分析骨组成,用恒pH法观察胫骨骨粉体外脱矿、脱矿后再矿化的动力学过程.结果表明,高脂家兔胸主动脉有明显的动脉硬化病变早期脂沉积的特征,胫骨骨密度降低,骨小梁稀疏,表面陷窝数增加;而且,骨矿物和有机基质按正常骨中的比例丢失,骨结构的改变使骨粉体外脱矿速率加快,脱矿后再矿化速率变慢.经喂饲LaCl,减轻动脉硬化病变,一定程度上逆转了高脂饲料诱导的上述骨的改变,说明镧有抑制早期脂沉积和细胞损伤及改善骨结构的作用.
出处 《自然科学进展》 北大核心 2004年第4期397-403,共7页
基金 国家自然科学基金(批准号:20031010)
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