Protective effect of lentivirus-mediated siRNA targeting ADAMTS-5 on cartilage degradation in a rat model of osteoarthritis

Chu,Xiangyu; You,Hongbo; Yuan,Xuefeng; Zhao,Wenbin; Li,Wenkai; Guo,Xin

doi:10.3892/ijmm.2013.1318

Protective effect of lentivirus-mediated siRNA targeting ADAMTS-5 on cartilage degradation in a rat model of osteoarthritis

Authors:
- Xiangyu Chu
- Hongbo You
- Xuefeng Yuan
- Wenbin Zhao
- Wenkai Li
- Xin Guo
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Affiliations: Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
Published online on: March 26, 2013 https://doi.org/10.3892/ijmm.2013.1318
Pages: 1222-1228

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Abstract

The etiology of osteoarthritis (OA) is complex and multifaceted. Osteoarthritis is a chronic and progressive disease of the joints that is characterized by the degradation of articular cartilage. A disintegrin and metalloproteinase with thrombospondin motifs-5 (ADAMTS-5) is the major aggrecanase in cartilage. The aim of this study was to evaluate the effect of ADAMTS-5 knockdown on cartilage degradation. Rat articular chondrocytes were transfected with lentivirus‑mediated ADAMTS-5 small interfering RNA (siRNA) or with empty vector control plasmid DNA (as the control). The suppression efficiency was measured using real-time polymerase chain reaction (RT-PCR) and western blot analysis. We then selected the most effective siRNA (siRNA1) and constructed the lentivirus-mediated siRNA targeting ADAMTS-5 for stable transfection. An animal model of OA was created using male Sprague-Dawley rats. OA was induced by performing anterior cruciate ligament transection (ACL-T) and partial medial meniscectomy (PM). The animals (n=80, weight 250‑300 g) received an intra‑articular injection of the empty vector control plasmid DNA or lentivirus‑mediated ADAMTS-5 siRNA1 (20 µl, 1x108 TU/ml). The progression of OA was analyzed using Osteoarthritis Research Society International (OARSI) scores. Compared with the control, ADAMTS-5 gene expression was decreased by approximately 80% by siRNA1 in a monolayer culture of chondrocytes. The intra‑articular injection of lentivirus‑mediated ADAMTS-5 siRNA1 in vivo resulted in the downregulation of ADAMTS-5 protein expression and improved OARSI scores (p<0.05). A single injection of lentivirus‑mediated ADAMTS‑5 siRNA prevented the degradation of articular cartilage. This method may provide a novel therapeutic strategy for the treatment of human OA.

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