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首页> 外文期刊>Journal of orthopaedic research >Biphasic effects of interleukin-1beta on osteoblast differentiation in vitro.
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Biphasic effects of interleukin-1beta on osteoblast differentiation in vitro.

机译:白细胞介素-1β对体外成骨细胞分化的双相作用。

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摘要

A rat calvarial cell model of osteoblast differentiation using the formation of bone nodules in vitro as an endpoint was used to assess the effects of IL-1beta on osteoblast differentiation. Short-term treatment (2 days) with IL-1beta early in culture resulted in increased nodule number and size as well as calcium content in contrast to long-term treatment (6 days) in cultures assessed at 10-12 days. This increase in bone formation was blocked by IL-1 receptor antagonists. Short-term treatment increased COX-2, prostaglandin (PGE(2)), and iNOS production. Exogenous PGE(2) with IL-1beta enhanced this effect. COX-2 inhibitors, indomethacin and N-39, blocked 50% of nodule formation. NO donor did not modify effects of IL-1beta, but iNOS inhibitor (1400W) partially blocked the effects. However, PGE(2) and NO donors could not rescue the decreased nodule number resulting from long-term IL-1beta treatment. The results of this study suggest a biphasic effect of IL-1beta on bone nodule formation activated by IL-1beta binding with IL-1 receptors, and the anabolic effect of early short-term treatment with IL-1beta is likely mediated by PGE without ruling out nitric oxide.
机译:以体外形成骨结节为终点的成骨细胞分化大鼠颅盖细胞模型用于评估IL-1β对成骨细胞分化的影响。与在10-12天评估的培养物中的长期治疗(6天)相比,在培养早期用IL-1beta进行短期治疗(2天)导致结节数量和大小以及钙含量增加。骨形成的这种增加被IL-1受体拮抗剂阻止。短期治疗可增加COX-2,前列腺素(PGE(2))和iNOS的产生。具有IL-1beta的外源PGE(2)增强了这种效果。 COX-2抑制剂吲哚美辛和N-39阻止了50%的结节形成。 NO供体没有改变IL-1beta的作用,但iNOS抑制剂(1400W)可以部分阻断该作用。但是,PGE(2)和NO供体无法挽救因长期IL-1beta治疗而导致的结节数目减少。这项研究的结果表明,IL-1beta对由与IL-1受体结合的IL-1beta激活的骨结节形成具有双相作用,并且早期用IL-1beta短期治疗的合成代谢作用可能是由PGE介导的,而没有裁定一氧化氮。

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