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Liu J, Zhou J, Wang J, Huang X, Qu M, Liao Y, Sun G, Zhong P, Tan J, Sun Z. Electroacupuncture ameliorates senile osteoporosis by promoting bone remodeling and regulating autophagy. Acupunct Med 2024:9645284241265872. [PMID: 39068547 DOI: 10.1177/09645284241265872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
OBJECTIVES Osteoporosis is widely regarded as a typical aged-related disease caused by impaired bone remodeling. This research was designed to explore the protective effects of electroacupuncture (EA) on senile osteoporosis in a rat model and investigate the underlying mechanisms. METHODS Three-month-old rats were randomly selected as the youth group, and 24-month-old rats were randomly assigned to the elderly and EA groups. Rats in the EA group received 30 min of EA at bilateral SP10, ST36, K13 and GB34 daily, 5 days a week for 8 weeks. Bone mineral density (BMD), microstructure of the bone tissue, bone turnover biomarkers and expression level of autophagy-related proteins were detected. RESULTS Compared with the elderly group, EA treatment significantly increased BMD of the femur and ameliorated the microstructure. EA treatment increased trabecular bone volume ratio (= bone volume / total volume [BV/TV]) and trabecular number (Tb.N) and decreased trabecular separation (Tb.Sp) in senile osteoporosis rats. Compared with the elderly group, the serum N-terminal telopeptide of type I collagen (NTX1) level in the EA group was lower, and the serum procollagen type I N-terminal propeptide (PINP) concentration was higher. In addition, the expression of Beclin 1, microtubule-associated protein I light chain 3 (LC3B) and P62 was inhibited in the senile osteoporosis rats after EA treatment. CONCLUSIONS EA can effectively alleviate aging-related bone loss and improve the microstructure of bone tissue in senile osteoporosis rats, and the regulation of autophagy might be one of the important mechanisms.
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Affiliation(s)
- Jing Liu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Jun Zhou
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Jinlin Wang
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Xiarong Huang
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Mengjian Qu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Ying Liao
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Guanghua Sun
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Peirui Zhong
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Jinqu Tan
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, China
| | - Zhilu Sun
- The First Affiliated Hospital, Department of Emergency, Hengyang Medical School, University of South China, Hengyang, China
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Karadayi A, Sarsmaz H, Çigel A, Engiz B, Ünal N, Ürkmez S, Gürgen S. Does Microwave Exposure at Different Doses in the Pre/Postnatal Period Affect Growing Rat Bone Development? Physiol Res 2024; 73:157-172. [PMID: 38466013 PMCID: PMC11019611 DOI: 10.33549/physiolres.935148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 01/15/2024] [Indexed: 04/26/2024] Open
Abstract
Effects of pre/postnatal 2.45 GHz continuous wave (CW), Wireless-Fidelity (Wi-Fi) Microwave (MW) irradiation on bone have yet to be well defined. The present study used biochemical and histological methods to investigate effects on bone formation and resorption in the serum and the tibia bone tissues of growing rats exposed to MW irradiation during the pre/postnatal period. Six groups were created: one control group and five experimental groups subjected to low-level different electromagnetic fields (EMF) of growing male rats born from pregnant rats. During the experiment, the bodies of all five groups were exposed to 2.45 GHz CW-MW for one hour/day. EMF exposure started after fertilization in the experimental group. When the growing male rats were 45 days old in the postnatal period, the control and five experimental groups' growing male and maternal rats were sacrificed, and their tibia tissues were removed. Maternal rats were not included in the study. No differences were observed between the control and five experimental groups in Receptor Activator Nuclear factor-kB (RANK) biochemical results. In contrast, there was a statistically significant increase in soluble Receptor Activator of Nuclear factor-kB Ligand (sRANKL) and Osteoprotegerin (OPG) for 10 V/m and 15 V/m EMF values. Histologically, changes in the same groups supported biochemical results. These results indicate that pre/postnatal exposure to 2.45 GHz EMF at 10 and 15 V/m potentially affects bone development.
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Affiliation(s)
- A Karadayi
- Department of Biophysics, Medicine Faculty, Ondokuz Mayis University, Samsun, Republic of Türkiye.
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Zhou J, Jia F, Qu M, Ning P, Huang X, Tan L, Liu D, Zhong P, Wu Q. The prevention effect of pulsed electromagnetic fields treatment on senile osteoporosis in vivo via improving the inflammatory bone microenvironment. Electromagn Biol Med 2024:1-15. [PMID: 38329038 DOI: 10.1080/15368378.2024.2314093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 10/26/2023] [Indexed: 02/09/2024]
Abstract
This study aimed to assess PEMF in a rat model of senile osteoporosis and its relationship with NLRP3-mediated low-grade inflammation in the bone marrow microenvironment. A total of 24 Sprague Dawley (SD) rats were included in this study. Sixteen of them were 24-month natural-aged male SD rats, which were randomly distributed into the Aged group and the PEMF group (n = 8 per group). The remaining 8 3-month -old rats were used as the Young positive control group (n = 8). Rats in the PEMF group received 12 weeks of PEMF with 40 min/day, five days per week, while the other rats received placebo PEMF intervention. Bone mineral density/microarchitecture, serum levels of CTX-1 and P1CP, and NLRP3-related signaling genes and proteins in rat bone marrow were then analyzed. The 12-week of PEMF showed significant mitigation of aging-induced bone loss and bone microarchitecture deterioration, i.e. PEMF increased the bone mineral density of the proximal femur and L5 vertebral body and improved parameters of the proximal tibia and L4 vertebral body. Further analysis showed that PEMF reversed aging-induced bone turnover, specifically, decreased serum CTX-1 and elevated serum P1CP. Furthermore, PEMF also dramatically inhibited NLRP3-mediated low-grade inflammation in the bone marrow, i.e. PEMF inhibited the levels of NLRP3, proCaspase1, cleaved Caspase1, IL-1β, and GSDMD-N. The study demonstrated that PEMF could mitigate the aging-induced bone loss and reverses the deterioration of bone microarchitecture probably through inhibiting NLRP3-mediated low-grade chronic inflammation to improve the inflammatory bone microenvironment in aged rats.
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Affiliation(s)
- Jun Zhou
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Feiyang Jia
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Mengjian Qu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Pengyun Ning
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Xiarong Huang
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Lu Tan
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Danni Liu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Peirui Zhong
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Qi Wu
- The First Affiliated Hospital, Rehabilitation Medicine Center, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Acupuncture/Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- School of Rehabilitation Medicine, Nanjing Medical University, Nanjing, Jiangsu, China
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Wu Q, Zhong P, Ning P, Tan L, Huang X, Peng T, Yin L, Luo F, Qu M, Zhou J. Treadmill training mitigates bone deterioration via inhibiting NLRP3/Caspase1/IL-1β signaling in aged rats. BMC Musculoskelet Disord 2022; 23:1089. [PMID: 36514079 PMCID: PMC9746211 DOI: 10.1186/s12891-022-06055-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 12/05/2022] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Although aerobic physical exercise may improve osteoporosis during ageing, the underlying mechanism of the favorable effects remains unclear. The aim of this study was to examine the localized and generalized proinflammatory indicators and the adaptive skeletal responses to treadmill training in aged rats to explore the potential mechanisms by which treadmill training impacts bone deterioration in a natural aged rat model. MATERIALS AND METHODS A total of 24 Sprague Dawley (SD) rats were included in this study. Sixteen of all these animals were twenty-four months natural aged male SD rats, which were distributed into two groups (n = 8/group): AC group with sham treadmill training, and AT group with 8 weeks treadmill training. The remaining 8 were six months male SD rats matched subline and supplier, which were used as the adult control group with sham treadmill training (YC group, n = 8). The serum, bone marrow, fresh femur, tibia, and lumbar spine were harvested for molecular biological analysis, bone mineral density (BMD) testing, and micro-CT analysis after 8 weeks of treadmill training. RESULTS After 8 weeks of intervention, the results showed that treadmill training increased BMD and inhibited deterioration of bone microarchitecture of hind limb bones. Further analysis showed that treadmill training increased serum P1CP concentration and decreased serum CTX-1level. Interestingly, treadmill training down-regulated the protein expressions of proinflammatory indicators, including NLRP3, proCaspase1, cleaved Caspase1, IL-1β, and GSDMD-N, and the mRNA levels of NLRP3, Caspase1, and IL-1β of the bone marrow. In addition, treadmill training also inhibited serum TNF-α and IL-1β concentration. However, 8 weeks of treadmill training did not increase BMD and bone microarchitecture in the lumbar spine. CONCLUSION Treadmill training mitigates the ageing-induced bone loss and reverses the deterioration of bone microarchitecture in hind limbs probably through inhibiting NLRP3/Caspase1/IL-1β signaling to attenuate low-grade inflammation and improve the inflammatory bone microenvironment.
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Affiliation(s)
- Qi Wu
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China ,grid.89957.3a0000 0000 9255 8984Nanjing Medical University, 211166 Nanjing, Jiangsu China
| | - Peirui Zhong
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Pengyun Ning
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Lu Tan
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Xiarong Huang
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Ting Peng
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Linwei Yin
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Fu Luo
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Mengjian Qu
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China
| | - Jun Zhou
- grid.412017.10000 0001 0266 8918 Department of Rehabilitation, Hengyang Medical School, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, Hunan Province 421001 Hengyang, People’s Republic of China ,grid.412017.10000 0001 0266 8918Rehabilitation Laboratory, Hengyang Medical School, The First Affiliated Hospital, University of South China, 421001 Hengyang, Hunan China ,grid.13291.380000 0001 0807 1581Department of Rehabilitation, West China Hospital, Sichuan University, 610000 Chengdu, China
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Zhou J, Wang J, Qu M, Huang X, Yin L, Liao Y, Huang F, Ning P, Zhong P, Zeng Y. Effect of the Pulsed Electromagnetic Field Treatment in a Rat Model of Senile Osteoporosis In Vivo. Bioelectromagnetics 2022; 43:438-447. [DOI: 10.1002/bem.22423] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 10/30/2022] [Indexed: 11/21/2022]
Affiliation(s)
- Jun Zhou
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Jinling Wang
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Mengjian Qu
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Xiarong Huang
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Linwei Yin
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Yang Liao
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Fujin Huang
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Pengyun Ning
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Peirui Zhong
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
| | - Yahua Zeng
- Department of Rehabilitation, Rehabilitation Medicine Center, Rehabilitation Laboratory, The First Affiliated Hospital, Hengyang Medical School University of South China Hengyang China
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Liu X, Gao X, Tong J, Yu L, Xu M, Zhang J. Improvement of Osteoporosis in Rats With Hind-Limb Unloading Treated With Pulsed Electromagnetic Field and Whole-Body Vibration. Phys Ther 2022; 102:6652209. [PMID: 35906872 DOI: 10.1093/ptj/pzac097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 01/22/2022] [Accepted: 04/24/2022] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Physical factors have been used to address disuse osteoporosis, but their effects and mechanism remain unclear. The purpose of this study was to determine the effects of pulsed electromagnetic field (PEMF) and whole-body vibration (WBV) on disuse osteoporosis to increase knowledge about treating osteoporosis. METHODS A disuse osteoporosis rat model was developed by hind-limb unloading (HU) for 6 weeks. Forty 4-month-old female Sprague-Dawley rats were divided into 5 groups and given the following interventions: HU, HU treated with PEMF (HUP), HU treated with WBV (HUW), HU treated with both PEMF and WBV (HUPW), and no intervention (controls). After 8 weeks of intervention, measurements were taken. RESULTS HU induced a decrease in bone mineral density (BMD), whereas HUP, HUW, and HUPW increased it. Moreover, the bone resorption markers tartrate-resistant acid phosphatase (TRAP) and C-terminal peptide of type 1 collagen in the HU group significantly increased, whereas the osteogenesis markers osteocalcin and N-terminal propeptide of type 1 procollagen significantly decreased. The markers osteocalcin and N-terminal propeptide of type 1 procollagen significantly increased, but TRAP and C-terminal peptide of type 1 collagen significantly decreased in the HUPW, HUP, and HUW groups compared with the HU group. In particular, HUPW effectively increased osteocalcin and decreased TRAP compared with HUP and WBV. Microcomputed tomography analysis of the femur indicated that HUPW improved trabecular number, bone volume over total volume, bone surface over bone volume, trabecular separation, and the structure model index compared with HUP and that it improved bone surface over bone volume, trabecular separation, and structure model index compared with HUW. The HUPW group showed a significant increase in maximum load compared with the HUW group and a significant increase in elastic modulus compared with the HUP group. CONCLUSION PEMF, WBV, and their combination all attenuated bone resorption and enhanced osteogenesis. WBV and the combination of treatments have great potential to improve osteogenesis compared with PEMF. In addition, HUPW significantly attenuated bone resorption compared with HUW and HUP. IMPACT The results of this study indicated that HUPW could effectively improve disuse osteoporosis compared with HUP, given that trabecular number and bone volume over total volume are associated with disuse osteoporosis. Moreover, BMD recovered well with HUP, HUW, and HUPW but the bone structure-especially mechanical performance-did not, indicating that osteoporosis should be evaluated with BMD and mechanical performance, not with BMD in isolation.
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Affiliation(s)
- Xifang Liu
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Health and Rehabilitation Science, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China.,Honghui Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Xiaohang Gao
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Health and Rehabilitation Science, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Jie Tong
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Health and Rehabilitation Science, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Liyin Yu
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Health and Rehabilitation Science, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Minglong Xu
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an, China
| | - Jianbao Zhang
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Health and Rehabilitation Science, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
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Liu J, Huang X, Zhou J, Li L, Xiao H, Qu M, Sun Z. Pulsed electromagnetic field alleviates synovitis and inhibits the NLRP3/Caspase-1/GSDMD signaling pathway in osteoarthritis rats. Electromagn Biol Med 2022; 41:101-107. [PMID: 34994274 DOI: 10.1080/15368378.2021.2021933] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/13/2021] [Indexed: 11/03/2022]
Abstract
Low-grade inflammation is a key mediator of the pathogenesis of Osteoarthritis (OA). Pulsed electromagnetic field (PEMF) can improve the symptoms of OA and potentially acts as an anti-inflammatory. The aim of this study was to investigate the effect of the PEMF on OA and its relationship with the NLRP3/Caspase-1/GSDMD signaling pathway.18 Three-month-old Sprague-Dawley (SD) rats were randomly divided into three groups (n = 6 per group): 1) OA group, 2) OA+PEMF group (OA with PEMF exposure), 3) Control group (sham operation with placebo PEMF). Rats in the OA and OA+PEMF groups were subjected to bilateral anterior cruciate ligament transection and ovariectomy. PEMF scheme: Pulse waveform, 3.82 mT, 8 Hz, 40 min/day, 5 days a week, for 12 weeks. The expression levels of NLRP3, Caspase-1, GSDMD, IL-1β, and MMP-13 were detected by qRT-PCR and Western blot. The pathological structures of OA were monitored with Safranin O/fast green staining and hematoxylin eosin staining. Our results showed that PEMF alleviated the degree of inflammation and degeneration of cartilage in rats with OA, based on the histopathological changes and decline of the expression of IL-1β and MMP-13. Moreover, the over-expression of NLRP3, Caspase-1, and GSDMD in the cartilage of the OA rats decreased after PEMF treatment. These results suggested that PEMF could be a highly promising noninvasive strategy to slow down the progression of OA and inhibition of the NLRP3/Caspase-1/GSDMD signaling pathway might be involved in the beneficial effect of PEMF.
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Affiliation(s)
- Jing Liu
- The First Affiliated Hospital, Rehabilitation Medicine Center,Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Xiarong Huang
- The First Affiliated Hospital, Rehabilitation Medicine Center,Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Jun Zhou
- The First Affiliated Hospital, Rehabilitation Medicine Center,Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Lan Li
- Department of Rehabilitation, Zhuzhou Central Hospital, Zhuzhou, Hunan, China
| | - Hao Xiao
- Department of Rehabilitation, The First Hospital of Chang Sha, Changsha, Hunna, China
| | - Mengjian Qu
- The First Affiliated Hospital, Rehabilitation Medicine Center,Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The First Affiliated Hospital, Rehabilitation Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Zhilu Sun
- The First Affiliated Hospital, Department of Emergency, Hengyang Medical School, University of South China, Hengyang, Hunan, China
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Static Magnetic Fields Enhance the Chondrogenesis of Mandibular Bone Marrow Mesenchymal Stem Cells in Coculture Systems. BIOMED RESEARCH INTERNATIONAL 2021; 2021:9962861. [PMID: 34873576 PMCID: PMC8643226 DOI: 10.1155/2021/9962861] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 10/20/2021] [Accepted: 11/12/2021] [Indexed: 11/18/2022]
Abstract
Objectives Combining the advantages of static magnetic fields (SMF) and coculture systems, we investigated the effect of moderate-intensity SMF on the chondrogenesis and proliferation of mandibular bone marrow mesenchymal stem cells (MBMSCs) in the MBMSC/mandibular condylar chondrocyte (MCC) coculture system. The main aim of the present study was to provide an experimental basis for obtaining better cartilage tissue engineering seed cells for the effective repair of condylar cartilage defects in clinical practice. Methods MBMSCs and MCCs were isolated from SD (Sprague Dawley) rats. Flow cytometry, three-lineage differentiation, colony-forming assays, immunocytochemistry, and toluidine blue staining were used for the identification of MBMSCs and MCCs. MBMSCs and MCCs were seeded into the lower and upper Transwell chambers, respectively, at a ratio of 1 : 2, and exposed to a 280 mT SMF. MBMSCs were harvested after 3, 7, or 14 days for analysis. CCK-8 was used to detect cell proliferation, Alcian blue staining was utilized to evaluate glycosaminoglycan (GAG), and western blotting and real-time quantitative polymerase chain reaction (RT-qPCR) detected protein and gene expression levels of SOX9, Col2A1 (Collagen Type II Alpha 1), and Aggrecan (ACAN). Results The proliferation of MBMSCs was significantly enhanced in the experimental group with MBMSCs cocultured with MCCs under SMF stimulation relative to controls (P < 0.05). GAG content was increased, and SOX9, Col2A1, and ACAN were also increased at the mRNA and protein levels (P < 0.05). Conclusions Moderate-intensity SMF improved the chondrogenesis and proliferation of MBMSCs in the coculture system, and it might be a promising approach to repair condylar cartilage defects in the clinical setting.
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Huang J, Li Y, Wang L, He C. Combined Effects of Low-Frequency Pulsed Electromagnetic Field and Melatonin on Ovariectomy-Induced Bone Loss in Mice. Bioelectromagnetics 2021; 42:616-628. [PMID: 34516671 DOI: 10.1002/bem.22372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 08/12/2021] [Accepted: 09/01/2021] [Indexed: 02/05/2023]
Abstract
Pulsed electromagnetic field (PEMF) therapy and melatonin (MEL) supplementation are expected to be important strategies for the treatment of osteoporosis. The aim of the current study was to investigate the efficacy of PEMF therapy, MEL supplementation, a combination of PEMF therapy, and MEL supplementation (PEMF + MEL) in mice with bilateral ovariectomy (OVX)-induced osteoporosis. Forty 12-week-old female C57/BL mice were randomly assigned to five groups (n = 8/group): OVX, PEMF, MEL, PEMF + MEL, and sham-operation (sham) groups. All mice in the first four groups were subjected to OVX. The mice in the PEMF and PEMF + MEL groups were exposed to PEMF (75 Hz, 1.6 mT, 1 h/day for 12 weeks), while those in the MEL and PEMF + MEL groups were administered MEL (50 mg/kg, i.p.). Body mass, micro-computed tomography, histology, immunohistochemistry, and real-time polymerase chain reaction were performed. PEMF + MEL treatment enhanced bone volume fraction (BV/TV) 2.2-fold over OVX control (P < 0.001) and increased expression levels of collagen type I (COL1) 1.9-fold and bone morphogenetic protein 2 (BMP2) 2.5-fold. PEMF + MEL also reduced the ratio of bone surface/bone volume (BS/BV) by 40% (P < 0.05) and appeared to reduce the number of osteoclasts in the metaphysis area. Preservation of bone value and bone microarchitecture in the combined therapy group were found to be superior to those in the single treatment groups. However, there were no apparent differences between the PEMF and MEL groups. The use of a combination of PEMF therapy and MEL supplementation may be an effective method to treat osteoporosis. © 2021 Bioelectromagnetics Society.
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Affiliation(s)
- Jinming Huang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Li
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Liqiong Wang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Chengqi He
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China.,Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China
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10
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Pulsed Electromagnetic Field Affects the Development of Postmenopausal Osteoporotic Women with Vertebral Fractures. BIOMED RESEARCH INTERNATIONAL 2021; 2021:4650057. [PMID: 34327227 PMCID: PMC8302368 DOI: 10.1155/2021/4650057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/11/2021] [Accepted: 07/05/2021] [Indexed: 02/07/2023]
Abstract
Background Postoperative pain, dysfunction, and significant bone loss may occur after vertebral fractures, which will lead to the occurrence of refractures and shorten the survival time, so postoperative rehabilitation is very important. Pulsed electromagnetic field therapy is noninvasive, pain-relieving, and beneficial to reduce bone loss and is an important treatment for patients to recover after surgery. Therefore, this study analyzed the effect of postmenopausal women's vertebral fracture rehabilitation after pulsed electromagnetic field treatment. Method This study uses a randomized controlled study, respectively, in the pulsed electromagnetic field treatment group (40 cases) and the control group (42 cases), respectively. We studied the results of health-related quality of life scores (HRQOL), back pain, body function, hip bone density, bone microstructure of tibia, and radius after 1 month and 3 months after surgery. Results Compared with the control group, the pulsed electromagnetic field treatment group (PEMF) can improve significantly the psychological score, 6-minute walk test, and Chair Sit-and-Reach one month after the operation. And at 3 months after surgery, the pulsed electromagnetic field treatment group can improve significantly in health-related quality of life scores (HRQOL), back pain, and body function. Regarding the effect of changes in bone mass, compared with the control group, pulsed electromagnetic field treatment had no significant effect on changes in hip bone density. As a result of changes in bone microstructure, pulsed electromagnetic field treatment can significantly improve the bone microstructure of the radius and tibia three months after vertebral fractures. Conclusion Pulsed electromagnetic field therapy has positive significance for improving pain, body functional changes, and bone loss after vertebral fracture surgery.
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11
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Wang L, Li Y, Xie S, Huang J, Song K, He C. Effects of Pulsed Electromagnetic Field Therapy at Different Frequencies on Bone Mass and Microarchitecture in Osteoporotic Mice. Bioelectromagnetics 2021; 42:441-454. [PMID: 34082467 DOI: 10.1002/bem.22344] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/16/2021] [Accepted: 04/11/2021] [Indexed: 02/05/2023]
Abstract
A pulsed electromagnetic field (PEMF) can promote osteogenesis. However, studies have shown variation in the signal characteristics in terms of waveform type, intensity, frequency, and treatment duration. Among the factors that affect electromagnetic fields, frequency plays a major role. However, few studies have investigated the effects of PEMF at different frequencies in osteoporotic mice. Therefore, our objective was to determine the effect of PEMF frequency in osteoporotic mice. Forty 3-month-old female mice were randomly divided into the following five groups: sham, OVX, and OVX followed by 1.6-mT PEMF exposure groups (8 Hz, 50 Hz, and 75 Hz, 1.6 mT). The PEMF was applied for 1 h/day, 7 days/week, for 4 weeks. After 4 weeks, the micro-computed tomography showed that PEMF with (50 and 75 Hz) ameliorated the deterioration of bone microarchitecture. Improvements in the bone histological analysis were identified for PEMF with 50 and 75 Hz groups compared with the ovariectomy (OVX) controls. Osteoclast numbers were decreased in PEMF with (50 and 75 Hz). Moreover, the real-time PCR demonstrated PEMF with (50 and 75 Hz) significantly promoted the expression of the osteoblast-related genes (ALP, OCN, Runx2), and increased the serum PINP. PEMF with (50 and 75 Hz) exerted significant inhibitory effects on the osteoclast-related mRNA expression (CTSK, NFATc1, TRAP) and bone resorption markers CTX-I and IL-1β. Taken together, our results showed that PEMF at 50 and 75 Hz with 1.6 mT significantly ameliorate the deterioration of bone microarchitecture in OVX mice. The inhibitory effect of PEMF may be associated with IL-1β inhibition. © 2021 Bioelectromagnetics Society.
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Affiliation(s)
- Liqiong Wang
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China.,Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, Chengdu, P. R. China
| | - Yi Li
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Suhang Xie
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Jinming Huang
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Kangping Song
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Chengqi He
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China.,Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, Chengdu, P. R. China
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12
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Wang L, Xie S, Zhu S, Gao C, He C. Efficacy of Pulsed Electromagnetic Fields on Experimental Osteopenia in Rodents: A Systematic Review. Bioelectromagnetics 2021; 42:415-431. [PMID: 34004034 DOI: 10.1002/bem.22348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 04/27/2021] [Accepted: 05/01/2021] [Indexed: 02/05/2023]
Abstract
Osteoporosis leads to increased bone fragility and risk of fractures. Different strategies have been employed to reduce bone loss, including the use of a pulsed electromagnetic field (PEMF). Although many experimental studies have demonstrated the effect of PEMF on reduction of bone loss, the outcomes studied are varied and insufficient, and the quality of evidence is unknown. Therefore, the aim of this review was to assess the preclinical evidence on the effect of PEMF on bone loss. The existing challenges were also evaluated, and suggestions were provided to strengthen the quality of evidence in future studies. All original articles concerning the effect of PEMF on osteoporosis in animal models were included. Twenty-four studies met the inclusion criteria, 23 of which suggested that PEMF was effective in reducing bone loss, while one study failed to demonstrate any benefit. Risk of bias analysis suggested that information on key measures to reduce bias was frequently not reported. Animal models for osteoporosis, PEMF intervention regimens, outcomes, and specific bone detection sites seemed to influence the efficacy of PEMF in osteoporosis. Our results indicate the potential benefits of PEMF selection in animal models of osteoporosis. However, due to the heterogeneity of the parameters and the quality of the included literature, comprehensive studies using standardized protocols are warranted to confirm the results. © 2021 Bioelectromagnetics Society.
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Affiliation(s)
- Liqiong Wang
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China.,Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, Chengdu, P.R. China
| | - Suhang Xie
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Siyi Zhu
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Chengfei Gao
- The Affiliated Hospital of Qingdao University, Qingdao, P.R. China
| | - Chengqi He
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P.R. China.,Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P.R. China.,Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, Chengdu, P.R. China
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13
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Lin CC, Chang YT, Lin RW, Chang CW, Wang GJ, Lai KA. Single pulsed electromagnetic field restores bone mass and microarchitecture in denervation/disuse osteopenic mice. Med Eng Phys 2020; 80:52-59. [DOI: 10.1016/j.medengphy.2019.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 07/09/2019] [Accepted: 10/14/2019] [Indexed: 12/25/2022]
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14
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Ehnert S, Schröter S, Aspera-Werz RH, Eisler W, Falldorf K, Ronniger M, Nussler AK. Translational Insights into Extremely Low Frequency Pulsed Electromagnetic Fields (ELF-PEMFs) for Bone Regeneration after Trauma and Orthopedic Surgery. J Clin Med 2019; 8:jcm8122028. [PMID: 31756999 PMCID: PMC6947624 DOI: 10.3390/jcm8122028] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/15/2019] [Accepted: 11/18/2019] [Indexed: 02/07/2023] Open
Abstract
The finding that alterations in electrical potential play an important role in the mechanical stimulation of the bone provoked hype that noninvasive extremely low frequency pulsed electromagnetic fields (ELF-PEMF) can be used to support healing of bone and osteochondral defects. This resulted in the development of many ELF-PEMF devices for clinical use. Due to the resulting diversity of the ELF-PEMF characteristics regarding treatment regimen, and reported results, exposure to ELF-PEMFs is generally not among the guidelines to treat bone and osteochondral defects. Notwithstanding, here we show that there is strong evidence for ELF-PEMF treatment. We give a short, confined overview of in vitro studies investigating effects of ELF-PEMF treatment on bone cells, highlighting likely mechanisms. Subsequently, we summarize prospective and blinded studies, investigating the effect of ELF-PEMF treatment on acute bone fractures and bone fracture non-unions, osteotomies, spinal fusion, osteoporosis, and osteoarthritis. Although these studies favor the use of ELF-PEMF treatment, they likewise demonstrate the need for more defined and better controlled/monitored treatment modalities. However, to establish indication-oriented treatment regimen, profound knowledge of the underlying mechanisms in the sense of cellular pathways/events triggered is required, highlighting the need for more systematic studies to unravel optimal treatment conditions.
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Affiliation(s)
- Sabrina Ehnert
- Siegfried Weller Institute for Trauma Research, Depterment of Trauma and Reconstructive Surgery, BG Unfallklinik Tübingen, Eberhard Karls Universität Tübingen, D-72076 Tübingen, Germany; (S.S.); (R.H.A.-W.); (W.E.); (A.K.N.)
- Correspondence: or ; Tel.: +49-7071-606-1067
| | - Steffen Schröter
- Siegfried Weller Institute for Trauma Research, Depterment of Trauma and Reconstructive Surgery, BG Unfallklinik Tübingen, Eberhard Karls Universität Tübingen, D-72076 Tübingen, Germany; (S.S.); (R.H.A.-W.); (W.E.); (A.K.N.)
| | - Romina H. Aspera-Werz
- Siegfried Weller Institute for Trauma Research, Depterment of Trauma and Reconstructive Surgery, BG Unfallklinik Tübingen, Eberhard Karls Universität Tübingen, D-72076 Tübingen, Germany; (S.S.); (R.H.A.-W.); (W.E.); (A.K.N.)
| | - Wiebke Eisler
- Siegfried Weller Institute for Trauma Research, Depterment of Trauma and Reconstructive Surgery, BG Unfallklinik Tübingen, Eberhard Karls Universität Tübingen, D-72076 Tübingen, Germany; (S.S.); (R.H.A.-W.); (W.E.); (A.K.N.)
| | - Karsten Falldorf
- Sachtleben GmbH, Hamburg, Haus Spectrum am UKE, Martinistraße 64, D-20251 Hamburg, Germany; (K.F.); (M.R.)
| | - Michael Ronniger
- Sachtleben GmbH, Hamburg, Haus Spectrum am UKE, Martinistraße 64, D-20251 Hamburg, Germany; (K.F.); (M.R.)
| | - Andreas K. Nussler
- Siegfried Weller Institute for Trauma Research, Depterment of Trauma and Reconstructive Surgery, BG Unfallklinik Tübingen, Eberhard Karls Universität Tübingen, D-72076 Tübingen, Germany; (S.S.); (R.H.A.-W.); (W.E.); (A.K.N.)
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15
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Wang N, Xin H, Xu P, Yu Z, Shou D. Erxian Decoction Attenuates TNF-α Induced Osteoblast Apoptosis by Modulating the Akt/Nrf2/HO-1 Signaling Pathway. Front Pharmacol 2019; 10:988. [PMID: 31551787 PMCID: PMC6748068 DOI: 10.3389/fphar.2019.00988] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 07/31/2019] [Indexed: 12/20/2022] Open
Abstract
Erxian decoction (EXD), a traditional Chinese medicine formula, has been used for treatment of osteoporosis for many years. The purpose of this study was to investigate the pharmacological effect of EXD in preventing osteoblast apoptosis and the underlying mechanism of prevention. Putative targets of EXD were predicted by network pharmacology, and functional and pathway enrichment analyses were also performed. Evaluations of bone mineral density, serum estradiol level, trabecular area fraction, serum calcium levels, and tumor necrosis factor (TNF)-α levels in ovariectomized rats, as well as cell proliferation assays, apoptosis assays, and western blotting in MC3T3-E1 osteoblasts were performed for further experimental validation. Ninety-three active ingredients in the EXD formula and 259 potential targets were identified. Functional and pathway enrichment analyses indicated that EXD significantly influenced the PI3K-Akt signaling pathway. In vivo experiments indicated that EXD treatment attenuated bone loss and decreased TNF-α levels in rats with osteoporosis. In vitro experiments showed that EXD treatment increased cell viability markedly and decreased levels of caspase-3 and the rate of apoptosis. It also promoted phosphorylation of Akt, nuclear translocation of transcription factor NF-erythroid 2-related factor (Nrf2), and hemeoxygenase-1 (HO-1) expression in TNF-α-induced MC3T3-E1 cells. Our results suggest that EXD exerted profound anti-osteoporosis effects, at least partially by reducing production of TNF-α and attenuating osteoblast apoptosis via Akt/Nrf2/HO-1 signaling pathway.
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Affiliation(s)
- Nani Wang
- Department of Medicine, Tongde Hospital of Zhejiang Province, Hangzhou, China
- School of Pharmacy, Zhejiang Chinese Medical University, China
| | - Hailiang Xin
- School of Pharmacy, Second Military Medical University, China
| | - Pingcui Xu
- Department of Medicine, Tongde Hospital of Zhejiang Province, Hangzhou, China
- School of Pharmacy, Zhejiang Chinese Medical University, China
| | - Zhongming Yu
- Department of Medicine, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - Dan Shou
- Department of Medicine, Tongde Hospital of Zhejiang Province, Hangzhou, China
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16
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Galli C, Pedrazzi G, Guizzardi S. The cellular effects of Pulsed Electromagnetic Fields on osteoblasts: A review. Bioelectromagnetics 2019; 40:211-233. [PMID: 30908726 DOI: 10.1002/bem.22187] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 03/08/2019] [Indexed: 12/12/2022]
Abstract
Electromagnetic fields (EMFs) have long been known to interact with living organisms and their cells and to bear the potential for therapeutic use. Among the most extensively investigated applications, the use of Pulsed EMFs (PEMFs) has proven effective to ameliorate bone healing in several studies, although the evidence is still inconclusive. This is due in part to our still-poor understanding of the mechanisms by which PEMFs act on cells and affect their functions and to an ongoing lack of consensus on the most effective parameters for specific clinical applications. The present review has compared in vitro studies on PEMFs on different osteoblast models, which elucidate potential mechanisms of action for PEMFs, up to the most recent insights into the role of primary cilia, and highlight the critical issues underlying at least some of the inconsistent results in the available literature. Bioelectromagnetics. 2019;9999:XX-XX. © 2019 Bioelectromagnetics Society.
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Affiliation(s)
- Carlo Galli
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Giuseppe Pedrazzi
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Stefano Guizzardi
- Department of Medicine and Surgery, University of Parma, Parma, Italy
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17
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Wang T, Yang L, Jiang J, Liu Y, Fan Z, Zhong C, He C. Pulsed electromagnetic fields: promising treatment for osteoporosis. Osteoporos Int 2019; 30:267-276. [PMID: 30603841 DOI: 10.1007/s00198-018-04822-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 12/18/2018] [Indexed: 02/05/2023]
Abstract
Osteoporosis (OP) is considered to be a well-defined disease which results in high morbidity and mortality. In patients diagnosed with OP, low bone mass and fragile bone strength have been demonstrated to significantly increase risk of fragility fractures. To date, various anabolic and antiresorptive therapies have been applied to maintain healthy bone mass and strength. Pulsed electromagnetic fields (PEMFs) are employed to treat patients suffering from delayed fracture healing and nonunions. Although PEMFs stimulate osteoblastogenesis, suppress osteoclastogenesis, and influence the activity of bone marrow mesenchymal stem cells (BMSCs) and osteocytes, ultimately leading to retention of bone mass and strength. However, whether PEMFs could be taken into clinical use to treat OP is still unknown. Furthermore, the deeper signaling pathways underlying the way in which PEMFs influence OP remain unclear.
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Affiliation(s)
- T Wang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - L Yang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - J Jiang
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Y Liu
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Z Fan
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - C Zhong
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, 610041, Sichuan, People's Republic of China
- Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - C He
- Department of Rehabilitation Medicine, West China Hospital, Sichuan University, No. 37 Guoxue Xiang, Chengdu, 610041, Sichuan, People's Republic of China.
- Key Laboratory of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China.
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18
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Magnetic Resonance Spectroscopy for Evaluating the Effect of Pulsed Electromagnetic Fields on Marrow Adiposity in Postmenopausal Women With Osteopenia. J Comput Assist Tomogr 2018; 42:792-797. [PMID: 29901507 DOI: 10.1097/rct.0000000000000757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Pulsed electromagnetic fields (PEMFs) could promote osteogenic differentiation and suppress adipogenic differentiation in bone mesenchymal stem cells ex vivo. However, data on the effect of PEMF on marrow adiposity in humans remain elusive. We aimed to determine the in vivo effect of PEMF on marrow adiposity in postmenopausal women using magnetic resonance spectroscopy. METHODS Sixty-one postmenopausal women with osteopenia, aged 53 to 85 years, were randomly assigned to receive either PEMF treatment or placebo. The session was performed 3 times per week for 6 months. All women received adequate dietary calcium and vitamin D. Bone mineral density (BMD) by dual-energy x-ray absorptiometry, vertebral marrow fat content by magnetic resonance spectroscopy, and serum biomarkers were evaluated before and after 6 months of treatment. RESULTS A total of 27 (87.1%) and 25 (83.3%) women completed the treatment schedule in the PEMF and placebo groups, respectively. After the 6-month treatment, lumbar spine and hip BMD increased by 1.46% to 2.04%, serum bone-specific alkaline phosphatase increased by 3.23%, and C-terminal telopeptides of type 1 collagen decreased by 9.12% in the PEMF group (P < 0.05), whereas the mean percentage changes in BMD and serum biomarkers were not significant in the placebo group. Pulsed electromagnetic field treatment significantly reduced marrow fat fraction by 4.81%. The treatment difference between the 2 groups was -4.43% (95% confidence interval, -3.70% to -5.65%; P = 0.009). CONCLUSIONS Pulsed electromagnetic field is an effective physiotherapy in postmenopausal women, and this effect may, at least in part, regulate the amount of fat within the bone marrow. Magnetic resonance spectroscopy may serve as a complementary imaging biomarker for monitoring response to therapy in osteoporosis.
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19
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The Use of Pulsed Electromagnetic Fields to Promote Bone Responses to Biomaterials In Vitro and In Vivo. Int J Biomater 2018; 2018:8935750. [PMID: 30254677 PMCID: PMC6140132 DOI: 10.1155/2018/8935750] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/09/2018] [Indexed: 12/14/2022] Open
Abstract
Implantable biomaterials are extensively used to promote bone regeneration or support endosseous prosthesis in orthopedics and dentistry. Their use, however, would benefit from additional strategies to improve bone responses. Pulsed Electromagnetic Fields (PEMFs) have long been known to act on osteoblasts and bone, affecting their metabolism, in spite of our poor understanding of the underlying mechanisms. Hence, we have the hypothesis that PEMFs may also ameliorate cell responses to biomaterials, improving their growth, differentiation, and the expression of a mature phenotype and therefore increasing the tissue integration of the implanted devices and their clinical success. A broad range of settings used for PEMFs stimulation still represents a hurdle to better define treatment protocols and extensive research is needed to overcome this issue. The present review includes studies that investigated the effects of PEMFs on the response of bone cells to different classes of biomaterials and the reports that focused on in vivo investigations of biomaterials implanted in bone.
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Effect of High-Induction Magnetic Stimulation on Elasticity of the Patellar Tendon. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:7172034. [PMID: 30154991 PMCID: PMC6093077 DOI: 10.1155/2018/7172034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 06/17/2018] [Accepted: 06/28/2018] [Indexed: 11/17/2022]
Abstract
Nowadays, a high-induction magnetic stimulation is starting to be increasingly applied as a biophysical stimulation in the conservative treatment of the degenerative locomotor system diseases. These are mainly in correlation with the changes in soft tissue elasticity, which should be positively influenced by the flow-induced electrical currents of high current density during high-induction magnetic stimulation. This assumption was verified within the interventional and prospective study using the ultrasound elastography. The group consisted of 6 volunteers, whose elasticity of the patellar tendons was measured using the 2D shear-wave ultrasound elastography. The volunteers were then exposed to a 20-minute high-induction magnetic stimulation session with a frequency of 20 Hz, in 2 s package intervals, with a 5 s pause, and a induced electric current density of 100 Am−2 in the tendons area. A tendon tension was measured five times for all volunteers, where mean tension at the marked area of the tendon, as well as the highest point tension indicated by the Q-Box, was monitored. The measurement results show that high-induction magnetic stimulation has an influence on the patellar tendon tension change, which occurred in the case of all involved volunteers when the patellar tension was decreased.
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Lei T, Liang Z, Li F, Tang C, Xie K, Wang P, Dong X, Shan S, Jiang M, Xu Q, Luo E, Shen G. Pulsed electromagnetic fields (PEMF) attenuate changes in vertebral bone mass, architecture and strength in ovariectomized mice. Bone 2018; 108:10-19. [PMID: 29229438 DOI: 10.1016/j.bone.2017.12.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 02/06/2023]
Abstract
Pulsed electromagnetic fields (PEMF) has been investigated as a noninvasive alternative method to prevent bone loss for postmenopausal osteoporosis (OP), and the bone tissue involved in these studies are usually long bones such as femur and tibia in OP patients or rat models. However, few studies have investigated the effects of PEMF on the vertebral bone in mice with OP. This study aimed to investigate whether PEMF preserve lumbar vertebral bone mass, microarchitecture and strength in ovariectomized (OVX) mouse model of OP and its associated mechanisms. Thirty 3-month-old female BALB/c mice were randomly divided into three groups (n=10): sham-operated control (Sham), ovariectomy (OVX), and ovariectomy with PEMF treatment (OVX+PEMF). The OVX+PEMF group was exposed to 15Hz, 1.6 mT PEMF for 8h/day, 7days/week. After 8weeks, the mice were sacrificed. The OVX+PEMF group showed lower body weight gain of mice induced by estrogen deficiency compared with OVX group. Biochemical analysis of serum demonstrated that serum bone formation markers including bone specific alkaline phosphatase (BALP), serum osteocalcin (OCN), osteoprotegerin (OPG) and N-terminal propeptide of type I procollagen (P1NP) were markedly higher in OVX+PEMF group compared with OVX group. Besides, serum bone resorption markers including tartrate-resistant acid phosphatase 5b (TRAP-5b) and C-terminal crosslinked telopeptides of type I collagen (CTX-I) were markedly lower in OVX+PEMF group compared with OVX group. Biomechanical test observed that OVX+PEMF group showed higher compressive maximum load and stiffness of the lumbar vertebrae compared with OVX group. Micro-computed tomography (μCT) and histological analysis of lumbar vertebrae revealed that PEMF partially prevented OVX-induced decrease of trabecular bone mass and deterioration of trabecular bone microarchitecture in lumbar vertebrae. Real-time PCR showed that the canonical Wnt signaling pathway of the lumbar vertebrae, including Wnt3a, LRP5 and β-catenin were markedly up-regulated in OVX+PEMF group compared with OVX group. Moreover, the mRNA expressions of RANKL and OPG were markedly up-regulated in OVX+PEMF group compared with OVX group, whereas no statistical difference in RANKL/OPG mRNA ratio was found between OVX+PEMF group and OVX group. Besides, our study also found that the RANK mRNA expression was down-regulated in OVX+PEMF group compared with OVX group. Taken together, we reported that long-term stimulation with PEMF treatment was able to alleviate lumbar vertebral OP in postmenopausal mice through a combination of increased bone formation and suppressed bone resorption related to regulating the skeletal gene expressions of Wnt3a/LRP5/β-catenin and OPG/RANKL/RANK signaling pathways.
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Affiliation(s)
- Tao Lei
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Zhuowen Liang
- Institute of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Feijiang Li
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Chi Tang
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Kangning Xie
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Pan Wang
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Xu Dong
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Shuai Shan
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Maogang Jiang
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Qiaoling Xu
- School of Nursing, Fourth Military Medical University, 169 West Changle Road, Xi'an, China
| | - Erping Luo
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China.
| | - Guanghao Shen
- School of Biomedical Engineering, Fourth Military Medical University, 169 West Changle Road, Xi'an, China.
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Effects of low-intensity pulsed electromagnetic fields on bone microarchitecture, mechanical strength and bone turnover in type 2 diabetic db/db mice. Sci Rep 2017; 7:10834. [PMID: 28883516 PMCID: PMC5589741 DOI: 10.1038/s41598-017-11090-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 08/17/2017] [Indexed: 01/06/2023] Open
Abstract
Type 2 diabetic patients have impaired bone quality, leading to increased fracture risk. Substantial evidence demonstrates that pulsed electromagnetic fields (PEMF) could resist osteopenia/osteoporosis induced by estrogen deficiency and disuse. However, the effects of PEMF on osteopenia/osteoporosis associated with diabetes, especially for more prevalent type 2 diabetes, remain poorly understood. We herein investigated the skeletal effects and mechanisms of PEMF (15 Hz, 20 Gs) on leptin receptor-deficient db/db mice with typical type 2 diabetic symptoms. Our µCT results showed that 12-week PEMF exposure significantly improved both cancellous and cortical bone microarchitecture in db/db mice. Three-point bending and biomechanical indentation testing demonstrated that PEMF improved whole-bone structural properties and tissue-level material properties in db/db mice. PEMF significantly promoted bone formation in db/db mice evidenced by increased serum osteocalcin and bone mineral apposition rate, whereas PEMF exerted no observable alteration in bone resorption. Real-time PCR showed that PEMF upregulated tibial gene expression of osteoblastogenesis-related of canonical Wnt/β-catenin signaling but not osteoclastogenesis-related RANKL-RANK signaling in db/db mice. Our findings demonstrate that PEMF improved bone quantity and quality with obvious anabolic activities in db/db mice, and imply that PEMF might become a clinically applicable treatment modality for improving bone quality in type 2 diabetic patients.
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Zhu S, He H, Zhang C, Wang H, Gao C, Yu X, He C. Effects of pulsed electromagnetic fields on postmenopausal osteoporosis. Bioelectromagnetics 2017; 38:406-424. [PMID: 28665487 DOI: 10.1002/bem.22065] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 06/05/2017] [Indexed: 02/05/2023]
Abstract
Postmenopausal osteoporosis (PMOP) is considered to be a well-defined subject that has caused high morbidity and mortality. In elderly women diagnosed with PMOP, low bone mass and fragile bone strength have been proven to significantly increase risk of fragility fractures. Currently, various anabolic and anti-resorptive therapies have been employed in an attempt to retain healthy bone mass and strength. Pulsed electromagnetic fields (PEMFs), first applied in treating patients with delayed fracture healing and nonunions, may turn out to be another potential and effective therapy for PMOP. PEMFs can enhance osteoblastogenesis and inhibit osteoclastogenesis, thus contributing to an increase in bone mass and strength. However, accurate mechanisms of the positive effects of PEMFs on PMOP remain to be further elucidated. This review attempts to summarize recent advances of PEMFs in treating PMOP based on clinical trials, and animal and cellular studies. Possible mechanisms are also introduced, and the future possibility of application of PEMFs on PMOP are further explored and discussed. Bioelectromagnetics. 38:406-424, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Siyi Zhu
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China
- Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
- Laboratory of Endocrinology and Metabolism, Department of Endocrinology, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Hongchen He
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Chi Zhang
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China
- Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Haiming Wang
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China
- Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Chengfei Gao
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China
- Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Xijie Yu
- Laboratory of Endocrinology and Metabolism, Department of Endocrinology, National Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, P. R. China
| | - Chengqi He
- Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China
- Rehabilitation Key Laboratory of Sichuan Province, West China Hospital, Sichuan University, Chengdu, P. R. China
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Zhou J, Liao Y, Zeng Y, Xie H, Fu C, Li N. Effect of intervention initiation timing of pulsed electromagnetic field on ovariectomy-induced osteoporosis in rats. Bioelectromagnetics 2017; 38:456-465. [PMID: 28510268 DOI: 10.1002/bem.22059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 04/25/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Jun Zhou
- Department of Rehabilitation; First Affiliated Hospital of University of South China; Hengyang People's Republic of China
| | - Yuan Liao
- Department of Rehabilitation; First Affiliated Hospital of University of South China; Hengyang People's Republic of China
- Clinical Medical College of Acupuncture, Moxibustion and Rehabilitation; Guangzhou University of Chinese Medicine; Guangzhou People's Republic of China
| | - Yahua Zeng
- Department of Rehabilitation; First Affiliated Hospital of University of South China; Hengyang People's Republic of China
| | - Haitao Xie
- Department of Clinical Laboratory; First Affiliated Hospital of University of South China; Hengyang People's Republic of China
| | - Chengxiao Fu
- Department of Rehabilitation; First Affiliated Hospital of University of South China; Hengyang People's Republic of China
| | - Neng Li
- Department of Rehabilitation; First Affiliated Hospital of University of South China; Hengyang People's Republic of China
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Lei T, Li F, Liang Z, Tang C, Xie K, Wang P, Dong X, Shan S, Liu J, Xu Q, Luo E, Shen G. Effects of four kinds of electromagnetic fields (EMF) with different frequency spectrum bands on ovariectomized osteoporosis in mice. Sci Rep 2017; 7:553. [PMID: 28373666 PMCID: PMC5428825 DOI: 10.1038/s41598-017-00668-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/08/2017] [Indexed: 02/08/2023] Open
Abstract
Electromagnetic fields (EMF) was considered as a non-invasive modality for treatment of osteoporosis while the effects were diverse with EMF parameters in time domain. In present study, we extended analysis of EMF characteristics from time domain to frequency domain, aiming to investigate effects of four kinds of EMF (LP (1–100 Hz), BP (100–3,000 Hz), HP (3,000–50,000 Hz) and AP (1–50,000 Hz)) on ovariectomized (OVX) osteoporosis (OP) in mice. Forty-eight 3-month-old female BALB/c mice were equally assigned to Sham, OVX, OVX + LP, OVX + BP, OVX + HP and OVX + AP groups (n = 8). After 8-week exposure (3 h/day), LP and BP significantly increased serum bone formation markers and osteogenesis-related gene expressions compared with OVX. Bedsides, LP and BP also slightly increased bone resorption activity compared with OVX, evidenced by increased RANKL/OPG ratio. HP sharply decreased serum bone formation and resporption markers and osteogenesis and osteoclastogenesis related gene expressions compared with OVX. AP had accumulative effects of LP, BP and HP, which significantly increased bone formation and decreased bone resporption activity compared with OVX. As a result, LP, BP and HP exposure did not later deterioration of bone mass, microarchitecture and mechanical strength in OVX mice with OP. However, AP stimulation attenuated OVX-induced bone loss.
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Affiliation(s)
- Tao Lei
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Feijiang Li
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Zhuowen Liang
- Institute of Orthopaedics, Xijing hospital, Fourth Military Medical University, Xi'an, China
| | - Chi Tang
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Kangning Xie
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Pan Wang
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Xu Dong
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Shuai Shan
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Juan Liu
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Qiaoling Xu
- School of Nursing, Fourth Military Medical University, 17 West Changle Road, Xi'an, China
| | - Erping Luo
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China.
| | - Guanghao Shen
- School of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, China.
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