目的对带有血小板凝血酶敏感蛋白结构域的解聚素与金属蛋白酶4(a disintegrin and metalloproteinase with thrombospondin motif 4,ADAMTS-4)、5及其在骨关节炎中作用的研究进展作一综述。方法查阅近年国内外关于ADAMTS-4、5以及骨关节炎的相关文献,总结分析ADAMTS-4、5的分子结构、生物学特性、抑制剂及在骨关节炎中的作用。结果 ADAMTS-4、5通过降解聚集蛋白聚糖、软骨寡聚基质蛋白等进行性减少软骨细胞和细胞外基质成分,从而诱发骨关节炎。结论 ADAMTS-4、5在骨关节炎发生过程中起重要作用;深入研究ADAMTS-4、5的相关机制,可促进临床药物靶点的确立,更好地指导骨关节炎的预防和治疗。
Bone graft substitutes are widely-studied as alternatives to bone grafts in the clinic. The currently available products are mostly ceramics and polymers. Considerable progress has been made in the study of the biodegradable magnesium alloys, which possess the necessary attributions of a suitable substitute, including an excellent mechanical property. In the present study, a minipig model of a lateral tibial plateau defect was used to evaluate the effectiveness of a magnesium alloy in the repair of a critical-sized defect. The micro-arc oxidation （MAO）-coated ZK60 alloy tablets and medical-grade calcium sulfate pellets were used as the test and control materials, respectively. Bone morphology was monitored by computed tomography after the implantation for 2 and 4 months. It was found that the bone morphology in minipigs following magnesium treatment was similar to that of the normal bone, whereas an abnormal and concave morphology was displayed following the calcium sulfate treatment. The average bone healing rate for the magnesium-treated defects was higher than that of the calcium sulfate-treated defects at the first 4 months following the implantation. Overall, magnesium treatment appeared to calcium sulfate treatment. Thus, the MAO-coated ZK60 al substitute, and further research on its biological activity in improve the defect repair as compared with the oy appears to be a useful biocompatible bone graft vivo is needed.
Qiang ZhangXiao LinZhengrong QiLili TanKe YangZhuangqi HuYan Wang
