Effects of Hypergravity on Osteopontin Expression in Osteoblasts.

Effects of Hypergravity on Osteopontin Expression in Osteoblasts.
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超重力对成骨细胞骨桥蛋白表达的影响

DOI:
10.1371/journal.pone.0128846
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Yang C
Yang C
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhou S;Zu Y;Sun Z;Zhuang F;Yang C

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机械刺激在骨重建和骨吸收中起着至关重要的作用。骨桥蛋白(OPN)是成骨细胞的标志物,在细胞通讯和基质矿化中起重要作用,并且已知在机械传导过程中起作用。超重力是对细胞进行机械刺激的一种方便方法。它对成骨细胞成熟的某些标志物有积极的影响,使其成为骨组织工程的一种可能策略。我们研究了超重力对成骨细胞OPN表达和细胞信号传导的影响。20 g超重力处理24 h可上调MC 3 T3-E1细胞OPN蛋白和mRNA水平的表达。超重力通过促进粘着斑组装、加强肌动蛋白束和增加Runx 2表达来促进OPN表达。在超重力触发的OPN表达途径中,粘着斑组装相关的FAK磷酸化位于肌动蛋白束组装的上游。
Mechanical stimuli play crucial roles in bone remodeling and resorption. Osteopontin (OPN), a marker for osteoblasts, is important in cell communication and matrix mineralization, and is known to function during mechanotransduction. Hypergravity is a convenient approach to forge mechanical stimuli on cells. It has positive effects on certain markers of osteoblast maturation, making it a possible strategy for bone tissue engineering. We investigated the effects of hypergravity on OPN expression and cell signaling in osteoblasts. Hypergravity treatment at 20 g for 24 hours upregulated OPN expression in MC3T3-E1 cells at the protein as well as mRNA level. Hypergravity promoted OPN expression by facilitating focal adhesion assembly, strengthening actin bundles, and increasing Runx2 expression. In the hypergravity-triggered OPN expression pathway, focal adhesion assembly-associated FAK phosphorylation was upstream of actin bundle assembly.
DOI: 10.1084/jem.193.3.399
发表时间: 2001-02-05
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