Effects of Roughly Focused Extracorporeal Shock Waves Therapy on the Expressions of Bone Morphogenetic Protein-2 and Osteoprotegerin in Osteoporotic Fracture in Rats  

作　　者：Hai-Ming Huang Xiao-Lin Li Shu-Qiang Tu Xiao-Feng Chen Chang-Chun Lu Liang-Hua Jiang 

机构地区：[1]Department of Orthopedic Surgery, Nanchang Hongdu Hospital of Traditional Chinese Medicine, Nanchang, Jiangxi 330006, China [2]Department of Ortllopedic Surgery, Shangtlai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai200233, China [3]Department of Orthopedic Surgery, Kunshan First People's Hospital, Suzhou, Jiangsu 215300, China

出　　处：《Chinese Medical Journal》2016年第21期2567-2575,共9页中华医学杂志（英文版）

基　　金：This work was supported by grants from the National Nature Science Foundation of China （No. 81071501） and the Shanghai Committee of Science and Technology, China （No. 09411966500）.

摘　　要：Background：Roughly focused extracorporeal shock waves therapy （ESWT） is characterized by a wide focal area,a large therapy zone,easy positioning,and less pain during treatment.The purpose of this study was to investigate the effects of roughly focused ESWT on the expression of osteoprotegerin （OPG） and bone morphogenetic protein-2 （BMP-2） in osteoporotic fractures in rats.Methods：Seventy-two female Sprague-Dawley （SD） rats,3 months old,were divided into sham-operated group （n =6） and an ovariectomized （OVX） group （n =66）.Sixty OVX SD rats were used as a model of double proximal tibial osteotomy and inner fixation.The osteotomy site in the left tibia was treated with roughly focused ESWT once at an energy density of 0.26 mJ/mm^2,60 doses/min,and 2000 pact quantities.The contralateral right tibia was left untreated and served as a control.Expression of OPG and BMP-2 in the callus of the osteoporotic fracture area was assessed using immunohistochemistry,real-time polymerase chain reaction （PCR）,and Western blotting analysis.Results：Bone mineral density （BMD） at the proximal tibia,femur,and L5 spine was significantly reduced after ovariectomy.BMD of proximal tibia was 12.9% less in the OVX group than that in the sham-operated group.Meanwhile,bilateral oophorectomy resulted in a lower trabecular bone volume fraction （BV/TV） in the proximal tibia of the sham-OVX animals.Three months after bilateral oophorectomy,BV/TV was 14.29% of baseline BV/TV in OVX legs versus 45.91% in the sham-OVX legs （P 〈 0.001）.These data showed that the SD rats became a suitable model of osteoporosis,3 months after they were OVX.Immunohistochemical analysis showed higher levels of BMP-2 and OPG expression in the treatment group than those in the control group.Compared with the contralateral controls,decreased expression of OPG and BMP-2 at 3 days after roughly focused ESWT,followed by a later increase at 7 days,was indicated by real-time PCR and Western blotting analysis.The OPG messenger RNBackground：Roughly focused extracorporeal shock waves therapy （ESWT） is characterized by a wide focal area,a large therapy zone,easy positioning,and less pain during treatment.The purpose of this study was to investigate the effects of roughly focused ESWT on the expression of osteoprotegerin （OPG） and bone morphogenetic protein-2 （BMP-2） in osteoporotic fractures in rats.Methods：Seventy-two female Sprague-Dawley （SD） rats,3 months old,were divided into sham-operated group （n =6） and an ovariectomized （OVX） group （n =66）.Sixty OVX SD rats were used as a model of double proximal tibial osteotomy and inner fixation.The osteotomy site in the left tibia was treated with roughly focused ESWT once at an energy density of 0.26 mJ/mm^2,60 doses/min,and 2000 pact quantities.The contralateral right tibia was left untreated and served as a control.Expression of OPG and BMP-2 in the callus of the osteoporotic fracture area was assessed using immunohistochemistry,real-time polymerase chain reaction （PCR）,and Western blotting analysis.Results：Bone mineral density （BMD） at the proximal tibia,femur,and L5 spine was significantly reduced after ovariectomy.BMD of proximal tibia was 12.9% less in the OVX group than that in the sham-operated group.Meanwhile,bilateral oophorectomy resulted in a lower trabecular bone volume fraction （BV/TV） in the proximal tibia of the sham-OVX animals.Three months after bilateral oophorectomy,BV/TV was 14.29% of baseline BV/TV in OVX legs versus 45.91% in the sham-OVX legs （P 〈 0.001）.These data showed that the SD rats became a suitable model of osteoporosis,3 months after they were OVX.Immunohistochemical analysis showed higher levels of BMP-2 and OPG expression in the treatment group than those in the control group.Compared with the contralateral controls,decreased expression of OPG and BMP-2 at 3 days after roughly focused ESWT,followed by a later increase at 7 days,was indicated by real-time PCR and Western blotting analysis.The OPG messenger RN

关 键 词：Bone Morphogenetic Protein-2 Extracorporeal Shock Waves Therapy Fracture Healing Osteoporotic Fracturc OSTEOPROTEGERIN 

分 类 号：R580[医药卫生—内分泌] R683[医药卫生—内科学]