Electroacupuncture prevents ovariectomy-induced osteoporosis in rats: a randomised controlled trial

Jun Zhou, Shiju Chen, Hua Guo, Lu Xia, Huifang Liu, Yuxi Qin, Chengqi He
Acupuncture in medicine : journal of the British Medical Acupuncture Society · 2012 · vol. 30(1) , pp. 37–43 · doi:10.1136/acupmed-2011-010114 · PMID:22378584 · W1965762793
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Electroacupuncture treatment increased bone mineral density, improved bone architecture and strength in ovariectomized rats, and upregulated Wnt/β-catenin signaling pathway expression.

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Abstract

BACKGROUND: Electroacupuncture (EA) treatment has been shown to increase bone mineral density (BMD) in ovariectomised (OVX) rats; however, the underlying mechanisms remain unclear. OBJECTIVE: To systematically evaluate the effects of EA on OVX rats and the Wnt/β-catenin signalling pathway. METHODS: Three-month-old female Sprague-Dawley rats were randomly divided into three different groups (n=10 each): sham operated control (sham operated), ovariectomy (OVX) and ovariectomy with EA treatment (OVX+EA). Rats in the OVX+EA group received 12-week EA treatments. RESULTS: Serum bone-specific alkaline phosphatase level (p<0.01), BMD of the proximal femoral metaphysis and the fifth lumbar (L5) vertebral body (both, p<0.05) and maximum load and energy to failure of L5 vertebral body (both p<0.01) were significantly higher in the OVX+EA group than in the OVX group. Trabecular area, trabecular width and trabecular number were significantly higher in the OVX+EA group by 66.9%, 29.2% and 30.3%, respectively, than in the OVX group (all, p<0.01). Trabecular separation was 31.9% lower in the OVX+EA group than in the OVX group (p<0.01). Quantitative real-time reverse transcription polymerised chain reaction indicated that the expressions of mRNAs for low-density lipoprotein receptor-related protein 5 and β-catenin were significantly increased in the OVX+EA group, as compared with the OVX group (p<0.01 and p<0.05, respectively). CONCLUSION: This study demonstrates that EA can prevent OVX-induced bone loss and deterioration of bone architecture and strength by stimulating the Wnt/β-catenin signalling pathway. These findings suggest that EA may bet a promising adjunct method for inhibiting OVX-induced osteoporosis in clinical settings.

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MeSH descriptors

Alkaline Phosphatase beta Catenin Bone and Bones Bone and Bones Bone and Bones Bone Density Electroacupuncture Low Density Lipoprotein Receptor-Related Protein-5 Osteoporosis, Postmenopausal Alkaline Phosphatase Animals beta Catenin beta Catenin Disease Models, Animal Female Femur Femur Femur Humans Low Density Lipoprotein Receptor-Related Protein-5

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