Mol Med Rep:机械加载联合CKIP-1基因敲除对骨质流失的作用

2018-07-02 MedSci MedSci原创

机械刺激在维持骨骼系统的生长和功能正常方面起着重要作用。如,宇航员长时间在太空中或长时间卧床休息的病人会发生机械卸载,并导致骨量迅速减少。酪蛋白激酶2相互作用蛋白-1(CKIP-1)是一种新型的负调节骨调节因子,已证明可以减少骨质流失并增强骨形成。本研究旨在探讨限制性动态载荷(Loading)与CKIP-1基因敲除(KO)联用对尾悬吊小鼠的机械卸载诱导的骨质流失的影响。测量血清代谢指标[碱性磷酸酶

机械刺激在维持骨骼系统的生长和功能正常方面起着重要作用。如,宇航员长时间在太空中或长时间卧床休息的病人会发生机械卸载,并导致骨量迅速减少。酪蛋白激酶2相互作用蛋白-1(CKIP-1)是一种新型的负调节骨调节因子,已证明可以减少骨质流失并增强骨形成。本研究旨在探讨限制性动态载荷(Loading)与CKIP-1基因敲除(KO)联用对尾悬吊小鼠的机械卸载诱导的骨质流失的影响。

测量血清代谢指标[碱性磷酸酶(ALP)活性和骨钙素(OCN)水平],胫骨机械性能(包括骨小梁微结构参数和胫骨生物力学性质),成骨细胞相关基因表达[ALP,OCN,胶原蛋白I和骨形态发生蛋白-2和骨保护素(OPG)]和破骨细胞相关基因表达[NF-kB配体(RANKL)的受体激活剂]。

结果表明,与野生型组相比,尾部悬浮四周后小鼠出现了骨量流失。加载+ KO处理后小鼠的力学性能、微构造和mRNA表达显著增加(P <0.05)。此外,与单独负荷或KO相比,联合治疗组中OPG/RANKL的比率增加。加载+ KO的综合效应大于加载或单独KO的效果(P <0.05)。

综上所述,该研究研究表明,加载+ KO可以抵消卸载引起的骨质流失,且两种治疗方法相结合具有叠加作用。联合治疗可能是临床治疗与太空旅行或卧床休息相关的废用骨质疏松症的一个新策略。

原始出处:

Han B, Wei SP, et al., Effects of constrained dynamic loading, CKIP 1 gene knockout and combination stimulations on bone loss caused by mechanical unloading. Mol Med Rep. 2018 Jun 26. doi: 10.3892/mmr.2018.9222.

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    2018-07-04 Eleven17
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