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Effect of strontium-substituted biphasic calcium phosphate on inflammatory mediators production by human monocytes

机译:锶取代的双相磷酸钙对人单核细胞产生炎性介质的影响

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Calcium phosphate materials are widely used as bone substitutes because of their properties close to those of the mineral phase of bones. Nevertheless, after several months, calcium phosphate-based materials release particles that may be phagocytosed by monocytes, leading to an inflammatory reaction. Strontium is well known to counteract the osteoporosis process, but little is known about its effect on inflammatory processes. The purpose of this work was to study the effect of biphasic calcium phosphate (BCP) particles substituted with strontium on the inflammatory reaction. Human primary monocytes stimulated or not by lipopolysaccharide (LPS) were exposed to BCP particles containing strontium for 6 and 24 h. Inflammatory mediators (cytokines and matrix metalloproteinases (MMPs)) production was then quantified by ELISA and zymography. We observed that the presence of strontium had few effects on unstimulated cells, but it decreased the production of pro-inflammatory cytokines and the chemokine interleukin 8 in LPS-stimulated cell-conditioned medium. This work suggests for the first time that strontium may be involved in the control of inflammatory processes following BCP phagocytosis by human monocytes.
机译:磷酸钙材料由于其性质接近于骨头的矿相而被广泛用作骨头的替代品。但是,几个月后,磷酸钙基材料释放出可能被单核细胞吞噬的颗粒,从而导致炎症反应。众所周知,锶能抵消骨质疏松过程,但对炎症过程的影响知之甚少。这项工作的目的是研究用锶取代的双相磷酸钙(BCP)颗粒对炎症反应的影响。将受或未受脂多糖(LPS)刺激的人类原代单核细胞暴露于含有锶的BCP颗粒中6和24小时。然后通过ELISA和酶谱法定量炎性介质(细胞因子和基质金属蛋白酶(MMP))的产生。我们观察到锶的存在对未刺激的细胞几乎没有影响,但是在LPS刺激的细胞条件培养基中,锶减少了促炎性细胞因子和趋化因子白介素8的产生。这项工作首次表明锶可能参与人类单核细胞BCP吞噬后炎症过程的控制。

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