Adenovirus-Mediated siRNA Targeting CXCR2 Attenuates Titanium Particle-Induced Osteolysis by Suppressing Osteoclast Formation

作者：Wang, Chen; Liu, Yang; Wang, Yang; Li, Hao; Zhang, Ran-Xi; He, Mi-Si; Chen, Liang; Wu, Ning-Ning; Liao, Yong; Deng, Zhong-Liang^*

来源：MEDICAL SCIENCE MONITOR, 2016, 22: 727-735.

DOI：10.12659/MSM.897243

• Osteoclasts
• Osteonecrosis
• RNA, Small Interfering

Background: Wear particle-induced peri-implant loosening is the most common complication affecting long-term outcomes in patients who undergo total joint arthroplasty. Wear particles and by-products from joint replacements may cause chronic local inflammation and foreign body reactions, which can in turn lead to osteolysis. Thus, inhibiting the formation and activity of osteoclasts may improve the functionality and long-term success of total joint arthroplasty. The aim of this study was to interfere with CXC chemokine receptor type 2 (CXCR2) to explore its role in wear particle-induced osteolysis.
Material/Methods: Morphological and biochemical assays were used to assess osteoclastogenesis in vivo and in vitro. CXCR2 was upregulated in osteoclast formation.
Results: Local injection with adenovirus-mediated siRNA targeting CXCR2 inhibited titanium-induced osteolysis in a mouse calvarial model in vivo. Furthermore, siCXCR2 suppressed osteoclast formation both directly by acting on osteoclasts themselves and indirectly by altering RANKL and OPG expression in osteoblasts in vitro.
Conclusions: CXCR2 plays a critical role in particle-induced osteolysis, and siCXCR2 may be a novel treatment for aseptic loosening.

• 出版日期2016-3-4
• 单位重庆医科大学; 重庆市肿瘤研究所