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间歇性动态压力促进兔胫骨近端骺板梯度增殖分化的实验研究

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摘要 目的观察兔骺板在周期性压应力生物反应器中受到不同时间的间歇性动态压力对其增殖分化的影响。方法取2周龄的兔胫骨近端骺板,置于动态压力生物反应器内培养5d,接受不同时间的间歇性动态压力刺激。A组为无压力刺激组,B~E组分别为每天间歇动态压力1.5、3、6和12h。免疫组织化学染色检测骺板标本中CollagenⅡ、CollagenⅩ、BMP-6、PTHrp、Sox-9和HIF-1的表达和分布。结果与A组比较,B、C、D和E组增殖层明显增厚,且C组增殖层增厚程度明显大于B、D和E组。CollagenⅡ和Sox-9主要在增殖层表达,CollagenⅩ和BMP-6主要在肥大层表达,PTHrp主要在肥大前区表达,HIF-1在全层均有表达,呈现梯度变化特点,在肥大前区表达最强。结论骺板在间歇性动态压力刺激下,分别针对增殖层及肥大层产生不同的梯度压应力,能够促进其梯度增殖分化。HIF-1可能是骺板在力学环境下产生梯度增殖的重要影响因素。
出处 《山东医药》 CAS 北大核心 2011年第20期46-47,I0002,I0003,共4页 Shandong Medical Journal
基金 国家自然科学基金资助项目(30772216)
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