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Gerdesmeyer L, Burgkart R, Saxena A. Clavicle fracture and triathlon performance: a case report. J Med Case Rep 2024; 18:197. [PMID: 38566165 PMCID: PMC10988895 DOI: 10.1186/s13256-024-04482-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 02/29/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Collarbone fracture is a common injury, particularly among athletes involved in contact sports and participating in endurance activities. Conventional treatment requires surgery and postoperative immobilization, resulting in an average return-to-sport timeframe of approximately 13 weeks. This case challenges the established treatment protocols, aiming to expedite recovery and enable a quicker resumption of high-intensity athletic activities. CASE PRESENTATION A 24-year-old Caucasian athlete completed a Half-Ironman Triathlon (70.3) merely three weeks post-collarbone fracture. Utilizing Extracorporeal Magneto-Transduction Therapy (EMTT) alongside surgical intervention, the patient achieved accelerated healing and remarkable performance outcomes without encountering any adverse effects. CONCLUSIONS The integration of EMTT into the treatment paradigm for bone fractures alters the traditional understanding of recovery timelines and rehabilitation strategies. This case highlights the potential benefits of electromagnetic wave therapy in expediting the healing process and enabling athletes to resume high-level sports activities at an earlier stage.
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Affiliation(s)
- Lennart Gerdesmeyer
- Department of Orthopaedics and Sports Orthopaedics, Klinikum Rechts der Isar, Technical University of Munich, Ismaninger Str. 22, 81675, Munich, Germany.
| | - Rainer Burgkart
- Department of Orthopaedics and Sports Orthopaedics, Klinikum Rechts der Isar, Technical University of Munich, Ismaninger Str. 22, 81675, Munich, Germany
| | - Amol Saxena
- PAMF-Sutter Department of Sports Medicine, 795 El Camino Real, Clark Building, Level 3, Palo Alto, CA, 94301, USA
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Lai B, Jiang H, Gao Y, Zhou X. Skeletal ciliopathy: pathogenesis and related signaling pathways. Mol Cell Biochem 2024; 479:811-823. [PMID: 37188988 DOI: 10.1007/s11010-023-04765-5] [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: 03/29/2023] [Accepted: 05/09/2023] [Indexed: 05/17/2023]
Abstract
Cilia are tiny organelles with conserved structures and components in eukaryotic cells. Ciliopathy is a set of diseases resulting from cilium dysfunction classified into first-order and second-order ciliopathy. With the advancement of clinical diagnosis and radiography, numerous skeletal phenotypes, including polydactyly, short limbs, short ribs, scoliosis, a narrow thorax, and numerous anomalies in bone and cartilage, have been discovered in ciliopathies. Mutation in genes encoding cilia core components or other cilia-related molecules have been found in skeletal ciliopathies. Meanwhile, various signaling pathways associated with cilia and skeleton development have been deemed to be significant for the occurrence and progression of diseases. Herein, we review the structure and key components of the cilium and summarize several skeletal ciliopathies with their presumable pathology. We also emphasize the signaling pathways involved in skeletal ciliopathies, which may assist in developing potential therapies for these diseases.
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Affiliation(s)
- Bowen Lai
- Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Fengyang Road 415, Shanghai, 200003, China
| | - Heng Jiang
- Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Fengyang Road 415, Shanghai, 200003, China
| | - Yuan Gao
- Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Fengyang Road 415, Shanghai, 200003, China
| | - Xuhui Zhou
- Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Fengyang Road 415, Shanghai, 200003, China.
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Ma T, Ding Q, Liu C, Wu H. Electromagnetic fields regulate calcium-mediated cell fate of stem cells: osteogenesis, chondrogenesis and apoptosis. Stem Cell Res Ther 2023; 14:133. [PMID: 37194107 DOI: 10.1186/s13287-023-03303-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/28/2023] [Indexed: 05/18/2023] Open
Abstract
Electromagnetic fields (EMF) are increasing in popularity as a safe and non-invasive therapy. On the one hand, it is widely acknowledged that EMF can regulate the proliferation and differentiation of stem cells, promoting the undifferentiated cells capable of osteogenesis, angiogenesis, and chondroblast differentiation to achieve bone repair purpose. On the other hand, EMF can inhibit tumor stem cells proliferation and promote apoptosis to suppress tumor growth. As an essential second messenger, intracellular calcium plays a role in regulating cell cycle, such as proliferation, differentiation and apoptosis. There is increasing evidence that the modulation of intracellular calcium ion by EMF leads to differential outcomes in different stem cells. This review summarizes the regulation of channels, transporters, and ion pumps by EMF-induced calcium oscillations. It furtherly discusses the role of molecules and pathways activated by EMF-dependent calcium oscillations in promoting bone and cartilage repair and inhibiting tumor stem cells growth.
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Affiliation(s)
- Tian Ma
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Qing Ding
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Chaoxu Liu
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
| | - Hua Wu
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
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The Possible Role of Electrical Stimulation in Osteoporosis: A Narrative Review. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59010121. [PMID: 36676745 PMCID: PMC9861581 DOI: 10.3390/medicina59010121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023]
Abstract
Osteoporosis is mainly a geriatric disease with a high incidence, and the resulting spinal fractures and hip fractures cause great harm to patients. Anti-osteoporosis drugs are the main treatment for osteoporosis currently, but these drugs have potential clinical limitations and side effects, so the development of new therapies is of great significance to patients with osteoporosis. Electrical stimulation therapy mainly includes pulsed electromagnetic fields (PEMF), direct current (DC), and capacitive coupling (CC). Meanwhile, electrical stimulation therapy is clinically convenient without side effects. In recent years, many researchers have explored the use of electrical stimulation therapy for osteoporosis. Based on this, the role of electrical stimulation therapy in osteoporosis was summarized. In the future, electrical stimulation might become a new treatment for osteoporosis.
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Popović T, Matavulj M, Nežić L, Radulović TN, Škrbić R. Pulsed electromagnetic field attenuates bone fragility in estrogen-deficient osteoporosis in rats. Technol Health Care 2023:THC220642. [PMID: 36641696 DOI: 10.3233/thc-220642] [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: 01/12/2023]
Abstract
BACKGROUND The pulsed electromagnetic fields (PEMFs) seem effective in increasing bone mineral density and promoting osteogenesis and bone healing. OBJECTIVE To examine the effect of two different modalities of PEMFs therapy in comparison with the recommended pharmacological treatment on experimental osteoporosis in rats. METHODS The experimental model of estrogen-deficient osteoporosis induced by ovariectomy was used in this study. The animals were exposed to PEMFs of various frequencies (40 Hz and 25 Hzk), intensities (10 mT and 36.4 μT), lengths of exposure, and the effects were compared with the standard treatment with pamidronate, vitamin D, and calcium supplementation. RESULTS The application of PEMF40Hz, significantly reduced the osteoporotic bone loss in female rats that were confirmed with biochemical, biomechanical, and histological analyses. These effects were more pronounced than in osteoporotic animals treated with pamidronate, vitamin D, and calcium supplementation. On the contrary, the exposure to PEMF25Hz did not show restorative effects but led to further progression of osteoporosis. CONCLUSION The exposure to PEMF40Hz, significantly restored osteoporosis and attenuated bone fragility in comparison to the rats exposed to PEMF25Hz or those treated with pamidronate, vitamin D, and calcium supplementation.
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Affiliation(s)
- Tamara Popović
- Institute for Physical Medicine and Rehabilitation "Dr. Miroslav Zotović", Banja Luka, Bosnia and Herzegovina
| | - Milica Matavulj
- Department of Histology and Embryology, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
| | - Lana Nežić
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
| | - Tatjana Nožica Radulović
- Institute for Physical Medicine and Rehabilitation "Dr. Miroslav Zotović", Banja Luka, Bosnia and Herzegovina
| | - Ranko Škrbić
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
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Chen Y, Lu C, Shang X, Wu K, Chen K. Primary cilia: The central role in the electromagnetic field induced bone healing. Front Pharmacol 2022; 13:1062119. [DOI: 10.3389/fphar.2022.1062119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/07/2022] [Indexed: 12/03/2022] Open
Abstract
Primary cilia have emerged as the cellular “antenna” that can receive and transduce extracellular chemical/physical signals, thus playing an important role in regulating cellular activities. Although the electromagnetic field (EMF) is an effective treatment for bone fractures since 1978, however, the detailed mechanisms leading to such positive effects are still unclear. Primary cilia may play a central role in receiving EMF signals, translating physical signals into biochemical information, and initiating various signalingsignaling pathways to transduce signals into the nucleus. In this review, we elucidated the process of bone healing, the structure, and function of primary cilia, as well as the application and mechanism of EMF in treating fracture healing. To comprehensively understand the process of bone healing, we used bioinformatics to analyze the molecular change and associated the results with other studies. Moreover, this review summarizedsummarized some limitations in EMFs-related research and provides an outlook for ongoing studies. In conclusion, this review illustrated the primary cilia and related molecular mechanisms in the EMF-induced bone healing process, and it may shed light on future research.
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Wang L, Lu Y, Cai G, Chen H, Li G, Liu L, Sun L, Guan Z, Sun W, Zhao C, Wang H. Polycystin-2 mediates mechanical tension-induced osteogenic differentiation of human adipose-derived stem cells by activating transcriptional co-activator with PDZ-binding motif. Front Physiol 2022; 13:917510. [PMID: 36091380 PMCID: PMC9450996 DOI: 10.3389/fphys.2022.917510] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/14/2022] [Indexed: 11/13/2022] Open
Abstract
Human adipose-derived stem cells (hASCs) have multi-directional differentiation potential including osteogenic differentiation. Mechanical stimulation is thought to be a key regulator of bone remodeling and has been proved to promote osteogenic differentiation of mesenchymal stem cells. However, the mechanism how mechanical tension-induced osteogenesis of hASCs still remains poor understood. Polycystin-2 (PC2), a member of the transient receptor potential polycystic (TRPP) family, is involved in cilia-mediated mechanical transduction. To understand the role of PC2 in osteogenic differentiation under mechanical stimuli in hASCs, PKD2 gene was stably silenced by using lentivirus-mediated shRNA technology. The results showed that mechanical tension sufficiently enhanced osteogenic differentiation but hardly affected proliferation of hASCs. Silencing PKD2 gene caused hASCs to lose the ability of sensing mechanical stimuli and subsequently promoting osteogenesis. PC2 knock-out also reduced the cilia population frequency and cilia length in hASCs. TAZ (transcriptional coactivator with PDZ-binding motif, also known as Wwtr1) could mediate the genes regulation and biological functions of mechanotransduction signal pathway. Here, mechanical tension also enhanced TAZ nuclear translocation of hASCs. PC2 knock-out blocked tension-induced upregulation of nuclear TAZ and suppress tension-induced osteogenesis. TAZ could directly interact with Runx2, and inhibiting TAZ could suppress tension-induced upregulation of Runx2 expression. In summary, our findings demonstrated that PC2 mediate mechanical tension-induced osteogenic differentiation of hASCs by activating TAZ.
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Affiliation(s)
- Liang Wang
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, China
| | - Yahui Lu
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Guanhui Cai
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Hongyu Chen
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Gen Li
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Luwei Liu
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Lian Sun
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Zhaolan Guan
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Wen Sun
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
| | - Chunyang Zhao
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
- *Correspondence: Hua Wang, ; Chunyang Zhao,
| | - Hua Wang
- Jiangsu Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
- *Correspondence: Hua Wang, ; Chunyang Zhao,
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8
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He WF, Qin R, Gao YH, Zhou J, Wei JJ, Liu J, Hou XF, Ma HP, Xian CJ, Li XY, Chen KM. The interdependent relationship between the nitric oxide signaling pathway and primary cilia in pulse electromagnetic field-stimulated osteoblastic differentiation. FASEB J 2022; 36:e22376. [PMID: 35616355 DOI: 10.1096/fj.202101577rr] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 05/06/2022] [Accepted: 05/13/2022] [Indexed: 11/11/2022]
Abstract
Pulsed electromagnetic fields (PEMFs) have long been recognized being safe and effective in treating bone fracture nonunion and osteoporosis. However, the mechanism of osteogenic action of PEMFs is still unclear. While primary cilia are reported to be a sensory organelle for PEMFs, and nitric oxide (NO) plays an indispensable role in osteogenic effect of PEMFs, the relationship between NO and primary cilia is unknown. In this study, effects of treatment with 50 Hz 0.6 mT PEMFs on osteogenic differentiation and mineralization, NO secretion, and ciliary location of specific proteins were examined in rat calvarial osteoblasts (ROBs) with normal or abrogated primary cilia. It was found that PEMFs stimulated the osteogenic differentiation by activating the NOS/NO/sGC/cGMP/PKG signaling pathway, which need the existence of primary cilia. All components of the signaling pathway including iNOS, eNOS, sGC, PKG-1, and PKG-2 were localized to primary cilia, and eNOS was phosphorylated inside the primary cilia. Besides, primary cilia were elongated significantly by PEMF treatment and changed dynamically with the activation NO/cGMP pathway. When the pathway was blocked by L-NAME, PEMFs could no longer elongate the primary cilia and stimulate the osteoblastic differentiation. Thus, this study for the first time observed activation of the NO/cGMP signaling pathway in ciliary compartment of osteoblasts, and PEMFs could not stimulate the osteoblastic differentiation if the NO signaling pathway was blocked or the ciliogenesis was inhibited. Our findings indicate the interdependent relationship between NO and primary cilia in the PEMF-promoted osteogenesis.
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Affiliation(s)
- Wen-Fang He
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China.,Department of Bioengineering, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, P. R. China.,Key Laboratory of Stem Cells and Gene Drugs of Gansu Province, Lanzhou, P. R. China
| | - Rong Qin
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Yu-Hai Gao
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Jian Zhou
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Juan-Juan Wei
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Jing Liu
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Xue-Feng Hou
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Hui-Ping Ma
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China
| | - Cory J Xian
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Xue-Yan Li
- Department of Bioengineering, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, P. R. China
| | - Ke-Ming Chen
- Fundamental Medical Science Research Laboratories, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, P. R. China.,Key Laboratory of Stem Cells and Gene Drugs of Gansu Province, Lanzhou, P. R. China
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9
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Li J, Cai J, Liu L, Wu Y, Chen Y. Pulsed electromagnetic fields inhibit mandibular bone deterioration depending on the Wnt3a/β-catenin signaling activation in type 2 diabetic db/db mice. Sci Rep 2022; 12:7217. [PMID: 35508623 PMCID: PMC9068619 DOI: 10.1038/s41598-022-10065-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 03/01/2022] [Indexed: 11/21/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) patients have compromised mandibular bone architecture/quality, which markedly increase the risks of tooth loosening, tooth loss, and failure of dental implantation. However, it remains lacks effective and safe countermeasures against T2DM-related mandibular bone deterioration. Herein, we studied the effects of pulsed electromagnetic fields (PEMF) on mandibular bone microstructure/quality and relevant regulatory mechanisms in T2DM db/db mice. PEMF exposure (20 Gs, 15 Hz) for 12 weeks preserved trabecular bone architecture, increased cortical bone thickness, improved material properties and stimulated bone anabolism in mandibles of db/db mice. PEMF also upregulated the expression of canonical Wnt3a ligand (but not Wnt1 or Wnt5a) and its downstream β-catenin. PEMF improved the viability and differentiation of primary osteoblasts isolated from the db/db mouse mandible, and stimulated the specific activation of Wnt3a/β-catenin signaling. These positive effects of PEMF on mandibular osteoblasts of db/db mice were almost totally abolished after Wnt3a silencing in vitro, which were equivalent to the effects following blockade of canonical Wnt signaling using the broad-spectrum antagonist DKK1. Injection with Wnt3a siRNA abrogated the therapeutic effects of PEMF on mandibular bone quantity/quality and bone anabolism in db/db mice. Our study indicates that PEMF might become a non-invasive and safe treatment alternative resisting mandibular bone deterioration in T2DM patients, which is helpful for protecting teeth from loosening/loss and securing the dental implant stability.
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Affiliation(s)
- Jianjun Li
- Second Clinical Division, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Beijing, 100081, China. .,Beijing Healya Technology Limited, Beijing, 100195, China.
| | - Jing Cai
- College of Basic Medicine, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Liheng Liu
- Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Yuwei Wu
- Second Clinical Division, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Beijing, 100081, China
| | - Yan Chen
- Second Clinical Division, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Beijing, 100081, China
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10
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Primary cilia in hard tissue development and diseases. Front Med 2021; 15:657-678. [PMID: 34515939 DOI: 10.1007/s11684-021-0829-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 10/13/2020] [Indexed: 10/20/2022]
Abstract
Bone and teeth are hard tissues. Hard tissue diseases have a serious effect on human survival and quality of life. Primary cilia are protrusions on the surfaces of cells. As antennas, they are distributed on the membrane surfaces of almost all mammalian cell types and participate in the development of organs and the maintenance of homeostasis. Mutations in cilium-related genes result in a variety of developmental and even lethal diseases. Patients with multiple ciliary gene mutations present overt changes in the skeletal system, suggesting that primary cilia are involved in hard tissue development and reconstruction. Furthermore, primary cilia act as sensors of external stimuli and regulate bone homeostasis. Specifically, substances are trafficked through primary cilia by intraflagellar transport, which affects key signaling pathways during hard tissue development. In this review, we summarize the roles of primary cilia in long bone development and remodeling from two perspectives: primary cilia signaling and sensory mechanisms. In addition, the cilium-related diseases of hard tissue and the manifestations of mutant cilia in the skeleton and teeth are described. We believe that all the findings will help with the intervention and treatment of related hard tissue genetic diseases.
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11
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Suryani L, Foo JKR, Cardilla A, Dong Y, Muthukumaran P, Hassanbhai A, Wen F, Simon DT, Iandolo D, Yu N, Ng KW, Teoh SH. Effects of Pulsed Electromagnetic Field Intensity on Mesenchymal Stem Cells. Bioelectricity 2021. [DOI: 10.1089/bioe.2021.0002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Luvita Suryani
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jyong Kiat Reuben Foo
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Angelysia Cardilla
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Yibing Dong
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Padmalosini Muthukumaran
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Ammar Hassanbhai
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Feng Wen
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Daniel T. Simon
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping, Sweden
| | - Donata Iandolo
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping, Sweden
- UMR5510 MATEIS, CNRS, INSA-Lyon, University of Lyon, Lyon, France
- Mines Saint-Etienne, INSERM, U1059 SAINBIOSE, Saint-Étienne, France
| | - Na Yu
- National Dental Centre Singapore, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Kee Woei Ng
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
- Environmental Chemistry & Materials Centre, Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, Singapore, Singapore
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts, USA
| | - Swee-Hin Teoh
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
- Lee Kong Chian School of Medicine, Singapore, Singapore
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Chen Y, Aspera-Werz RH, Menger MM, Falldorf K, Ronniger M, Stacke C, Histing T, Nussler AK, Ehnert S. Exposure to 16 Hz Pulsed Electromagnetic Fields Protect the Structural Integrity of Primary Cilia and Associated TGF-β Signaling in Osteoprogenitor Cells Harmed by Cigarette Smoke. Int J Mol Sci 2021; 22:7036. [PMID: 34210094 PMCID: PMC8268780 DOI: 10.3390/ijms22137036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 01/01/2023] Open
Abstract
Cigarette smoking (CS) is one of the main factors related to avoidable diseases and death across the world. Cigarette smoke consists of numerous toxic compounds that contribute to the development of osteoporosis and fracture nonunion. Exposure to pulsed electromagnetic fields (PEMF) was proven to be a safe and effective therapy to support bone fracture healing. The aims of this study were to investigate if extremely low frequency (ELF-) PEMFs may be beneficial to treat CS-related bone disease, and which effect the duration of the exposure has. In this study, immortalized human mesenchymal stem cells (SCP-1 cells) impaired by 5% cigarette smoke extract (CSE) were exposed to ELF-PEMFs (16 Hz) with daily exposure ranging from 7 min to 90 min. Cell viability, adhesion, and spreading were evaluated by Sulforhodamine B, Calcein-AM staining, and Phalloidin-TRITC/Hoechst 33342 staining. A migration assay kit was used to determine cell migration. Changes in TGF-β signaling were evaluated with an adenoviral Smad2/3 reporter assay, RT-PCR, and Western blot. The structure and distribution of primary cilia were analyzed with immunofluorescent staining. Our data indicate that 30 min daily exposure to a specific ELF-PEMF most effectively promoted cell viability, enhanced cell adhesion and spreading, accelerated migration, and protected TGF-β signaling from CSE-induced harm. In summary, the current results provide evidence that ELF-PEMF can be used to support early bone healing in patients who smoke.
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Affiliation(s)
- Yangmengfan Chen
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Schnarrenbergstr. 95, D-72076 Tübingen, Germany; (Y.C.); (R.H.A.-W.); (M.M.M.); (T.H.); (S.E.)
| | - Romina H. Aspera-Werz
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Schnarrenbergstr. 95, D-72076 Tübingen, Germany; (Y.C.); (R.H.A.-W.); (M.M.M.); (T.H.); (S.E.)
| | - Maximilian M. Menger
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Schnarrenbergstr. 95, D-72076 Tübingen, Germany; (Y.C.); (R.H.A.-W.); (M.M.M.); (T.H.); (S.E.)
| | - Karsten Falldorf
- Sachtleben GmbH, Haus Spectrum am UKE, Martinistraße 64, D-20251 Hamburg, Germany; (K.F.); (M.R.); (C.S.)
| | - Michael Ronniger
- Sachtleben GmbH, Haus Spectrum am UKE, Martinistraße 64, D-20251 Hamburg, Germany; (K.F.); (M.R.); (C.S.)
| | - Christina Stacke
- Sachtleben GmbH, Haus Spectrum am UKE, Martinistraße 64, D-20251 Hamburg, Germany; (K.F.); (M.R.); (C.S.)
| | - Tina Histing
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Schnarrenbergstr. 95, D-72076 Tübingen, Germany; (Y.C.); (R.H.A.-W.); (M.M.M.); (T.H.); (S.E.)
| | - Andreas K. Nussler
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Schnarrenbergstr. 95, D-72076 Tübingen, Germany; (Y.C.); (R.H.A.-W.); (M.M.M.); (T.H.); (S.E.)
| | - Sabrina Ehnert
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Schnarrenbergstr. 95, D-72076 Tübingen, Germany; (Y.C.); (R.H.A.-W.); (M.M.M.); (T.H.); (S.E.)
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13
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Zhou J, Gao YH, Zhu BY, He WF, Wang G, Xian CJ, Chen KM. The frequency window effect of sinusoidal electromagnetic fields in promoting osteogenic differentiation and bone formation involves extension of osteoblastic primary cilia and activation of protein kinase A. Cell Biol Int 2021; 45:1685-1697. [PMID: 33811714 DOI: 10.1002/cbin.11606] [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: 09/21/2020] [Revised: 03/19/2021] [Accepted: 04/01/2021] [Indexed: 01/27/2023]
Abstract
Electromagnetic fields (EMFs) have emerged as a versatile means for osteoporosis treatment and prevention. However, its optimal application parameters are still elusive. Here, we optimized the frequency parameter first by cell culture screening and then by animal experiment validation. Osteoblasts isolated from newborn rats (ROBs) were exposed 90 min/day to 1.8 mT SEMFs at different frequencies (ranging from 10 to 100 Hz, interval of 10 Hz). SEMFs of 1.8 mT inhibited ROB proliferation at 30, 40, 50, 60 Hz, but increased proliferation at 10, 70, 80 Hz. SEMFs of 10, 50, and 70 Hz promoted ROB osteogenic differentiation and mineralization as shown by alkaline phosphatase (ALP) activity, calcium content, and osteogenesis-related molecule expression analyses, with 50 Hz showing greater effects than 10 and 70 Hz. Treatment of young rats with 1.8 mT SEMFs at 10, 50, or 100 Hz for 2 months significantly increased whole-body bone mineral density (BMD) and femur microarchitecture, with the 50 Hz group showing the greatest effect. Furthermore, 1.8 mT SEMFs extended primary cilia lengths of ROBs and increased protein kinase A (PKA) activation also in a frequency-dependent manner, again with 50 Hz SEMFs showing the greatest effect. Pretreatment of ROBs with the PKA inhibitor KT5720 abolished the effects of SEMFs to increase primary cilia length and promote osteogenic differentiation/mineralization. These results indicate that 1.8 mT SEMFs have a frequency window effect in promoting osteogenic differentiation/mineralization in ROBs and bone formation in growing rats, which involve osteoblast primary cilia length extension and PKA activation.
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Affiliation(s)
- Jian Zhou
- Precise Genome Engineering Center, School of Life Sciences, Guangzhou University, Guangzhou, China.,Institute of Orthopaedics, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, China
| | - Yu Hai Gao
- Institute of Orthopaedics, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, China
| | - Bao Ying Zhu
- Institute of Orthopaedics, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, China
| | - Wen Fang He
- Institute of Orthopaedics, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, China
| | - Gang Wang
- Precise Genome Engineering Center, School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Cory J Xian
- UniSA Clinical & Health Science, University of South Australia, Adelaide, South Australia, Australia
| | - Ke Ming Chen
- Institute of Orthopaedics, The 940th Hospital of Joint Logistic Support Force, People's Liberation Army of China, Lanzhou, China
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14
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Wu GJ, Cherng YG, Chen JT, Chang CC, Liu SH, Chen RM. Genistein Triggers Translocation of Estrogen Receptor-Alpha in Mitochondria to Induce Expressions of ATP Synthesis-Associated Genes and Improves Energy Production and Osteoblast Maturation. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2021; 49:901-923. [PMID: 33853499 DOI: 10.1142/s0192415x21500439] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Our previous study showed that estrogen can induce mitochondrial adenosine triphosphate (ATP) synthesis-associated gene expressions and osteoblast maturation. Genistein, a phytoestrogenic isoflavone that is widely found in various foods and traditional herb products, is beneficial for osteogenesis by selectively triggering estrogen receptor alpha (ER[Formula: see text] expression. In this study, we further investigated the mechanisms of genistein-induced energy production and osteoblast activation. Exposure of rat calvarial osteoblasts and human U-2 OS cells to genistein triggered osteoblast activation without affecting cell survival. Treatment with genistein time-dependently induced ER[Formula: see text] mRNA and protein expressions in rat calvarial osteoblasts. Analyses by confocal microscopy and immunoblotting showed that genistein stimulated translocation of ER[Formula: see text] from the cytoplasm to mitochondria. Subsequently, expressions of mitochondrial cytochrome c oxidase (COX) I and II mRNAs and proteins in primary rat osteoblasts were induced after exposure to genistein. Knocking-down ER[Formula: see text] concurrently inhibited genistein-induced COX I and II mRNA expressions. In addition, mitochondrial complex enzyme activities, the mitochondrial membrane potential, and cellular ATP levels in rat calvarial osteoblasts were time-dependently augmented by genistein. Suppressing ER[Formula: see text] expression instantaneously lowered genistein-induced enhancements of mitochondrial energy production and osteoblast activation. Effects of genistein on ER[Formula: see text] translocation, COX I and II mRNA expressions, ATP synthesis, and osteoblast activation were further confirmed in human U-2 OS cells. This study showed that genistein can stimulate energy production and consequent osteoblast activation via inducing ER[Formula: see text]-mediated mitochondrial ATP synthesis-linked gene expressions.
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Affiliation(s)
- Gong-Jhe Wu
- Department of Anesthesiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.,Department of Anesthesiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yih-Giun Cherng
- Department of Anesthesiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jui-Tai Chen
- Department of Anesthesiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chuen-Chau Chang
- Department of Anesthesiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Anesthesiology and Health Policy Research Center, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Shing-Hwa Liu
- Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Institute of Toxicology, College of Medicine National Taiwan University Taipei, Taiwan
| | - Ruei-Ming Chen
- Anesthesiology and Health Policy Research Center, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan.,Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan.,TMU Research Center of Cancer Translational Medicine, Taipei, Taiwan
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15
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Alekseeva LI, Byalovsky YY, Zagorodny NV, Ivanova GE, Karateev DE, Konchugova TV, Rakitina IS, Strakhov MA. [Pathophysiological mechanisms of the therapeutic action of alternating electromagnetic fields in the treatment of osteoarticular pathology]. VOPROSY KURORTOLOGII, FIZIOTERAPII, I LECHEBNOI FIZICHESKOI KULTURY 2021; 98:80-90. [PMID: 34223758 DOI: 10.17116/kurort20219803180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Treatment of osteoarticular pathology with an alternating electromagnetic field (AEMF) is used today as a promising, non-invasive and safe strategy of physiotherapy. It has been shown that the action of alternating electromagnetic fields on the musculoskeletal system triggers signaling cascades that effectively contribute to the restoration of bone and articular tissue. The pathophysiological mechanisms underlying the cellular and subcellular effects of stimulation by an alternating electromagnetic field during the restoration of bone and articular tissue are considered. It was pointed out the several key signaling pathways involved in the restoration of bone and articular tissue under the influence of electromagnetic fields with an analysis of the potential for therapeutic application of electromagnetic fields alone or in combination with other available therapies.
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Affiliation(s)
- L I Alekseeva
- V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia
| | | | - N V Zagorodny
- N.N. Priorov Central Research Institute of Traumatology and Orthopedics, Moscow, Russia
| | - G E Ivanova
- N.I. Pirogov Russian National Research Medical University, Moscow, Russia
| | - D E Karateev
- M.F. Vladimirsky Moscow Regional Research and Clinical Institute, Moscow, Russia
| | - T V Konchugova
- National Medical Research Center for Rehabilitation and Balneology, Moscow, Russia
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | | | - M A Strakhov
- N.I. Pirogov Russian National Research Medical University, Moscow, Russia
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16
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Ding D, Yang X, Luan HQ, Wu XT, He C, Sun LW, Fan YB. Pharmacological Regulation of Primary Cilium Formation Affects the Mechanosensitivity of Osteocytes. Calcif Tissue Int 2020; 107:625-635. [PMID: 32940720 DOI: 10.1007/s00223-020-00756-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/04/2020] [Indexed: 12/14/2022]
Abstract
Primary cilia are responsible for sensing mechanical loading in osteocytes. However, the underlying working mechanism of cilia remains elusive. An osteocyte model is necessary to reveal the role of cilia. Furthermore, the osteocyte model should be with upregulated or downregulated primary cilium expression. Herein, we used a pharmacological method to regulate the cilium formation of osteocytes. After screening, some pharmacological agents can regulate the cilium formation of osteocytes. We performed a CCK-8 assay to analyze the optimal working conditions of the drugs for MLO-Y4 cells. The agents include chloral hydrate (CH), Gd3+, Li+, and rapamycin. The expression of cilia affects the cellular functions, including mechanosensitivity, of osteocytes. Results showed that CH downregulated the cilium formation and ciliogenesis of osteocytes. In addition, Gd3+, Li+, and rapamycin upregulated the cilium expression of osteocytes. Moreover, the cilium expression positively correlated with the mechanosensitivity of osteocytes. This work reveals the role of primary cilia in the mechanosensing of osteocytes.
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Affiliation(s)
- Dong Ding
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Xiao Yang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Hui-Qin Luan
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, 100176, China
| | - Xin-Tong Wu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Cai He
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Lian-Wen Sun
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, China.
| | - Yu-Bo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, China.
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, 100176, China.
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17
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Che J, Yang J, Zhao B, Zhang G, Wang L, Peng S, Shang P. The Effect of Abnormal Iron Metabolism on Osteoporosis. Biol Trace Elem Res 2020; 195:353-365. [PMID: 31473898 DOI: 10.1007/s12011-019-01867-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 08/08/2019] [Indexed: 12/16/2022]
Abstract
Iron is one of the important trace elements in life activities. Abnormal iron metabolism increases the incidence of many skeletal diseases, especially for osteoporosis. Iron metabolism plays a key role in the bone homeostasis. Disturbance of iron metabolism not only promotes osteoclast differentiation and apoptosis of osteoblasts but also inhibits proliferation and differentiation of osteoblasts, which eventually destroys the balance of bone remodeling. The strength and density of bone can be weakened by the disordered iron metabolism, which increases the incidence of osteoporosis. Clinically, compounds or drugs that regulate iron metabolism are used for the treatment of osteoporosis. The goal of this review summarizes the new progress on the effect of iron overload or deficiency on osteoporosis and the mechanism of disordered iron metabolism on osteoporosis. Explaining the relationship of iron metabolism with osteoporosis may provide ideas for clinical treatment and development of new drugs.
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Affiliation(s)
- Jingmin Che
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, Guangdong, China
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Jiancheng Yang
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Bin Zhao
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Ge Zhang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Luyao Wang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Songlin Peng
- Department of Spine Surgery, Shenzhen People's Hospital, Shenzhen, 518000, Guangdong, China
| | - Peng Shang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, Guangdong, China.
- Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China.
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18
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Zhang B, Xie Y, Ni Z, Chen L. Effects and Mechanisms of Exogenous Electromagnetic Field on Bone Cells: A Review. Bioelectromagnetics 2020; 41:263-278. [PMID: 32159242 DOI: 10.1002/bem.22258] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 02/25/2020] [Indexed: 12/16/2022]
Abstract
Osteoporosis, fractures, and other bone diseases or injuries represent serious health problems in modern society. A variety of treatments including drugs, surgeries, physical therapies, etc. have been used to prevent or delay the progression of these diseases/injuries with limited effects. Electromagnetic field (EMF) has been used to non-invasively treat bone diseases, such as fracture and osteoporosis, for many years. However, because a variety of cellular and molecular events can be affected by EMF with various parameters, the precise bioeffects and underlying mechanisms of specific EMF on bone cells are still obscure. Here, we summarize the common therapeutic parameters (frequency and intensity) of major types of EMF used to treat bone cells taken from 32 papers we selected from the PubMed database published in English from 1991 to 2018. Briefly, pulse EMF promotes the proliferation of osteoblasts when its frequency is 7.5-15 Hz or 50-75 Hz and the intensity is 0.40-1.55 mT or 3.8-4 mT. Sinusoidal EMF, with 0.9-4.8 mT and 45-60 Hz, and static magnetic field with 0.1-0.4 mT or 400 mT, can promote osteoblast differentiation and maturation. Finally, we summarize the latest advances on the molecular signaling pathways influenced by EMF in osteoblasts and osteoclasts. A variety of molecules such as adenosine receptors, calcium channels, BMP2, Notch, Wnt1, etc., can be influenced by EMF in osteoblasts. For osteoclasts, EMF affects RANK, NF-κB, MAPK, etc. We speculate that EMF with different frequencies and intensities exert distinct bioeffects on specific bone cells. More high-quality work is required to explore the detailed effects and underlying mechanisms of EMF on bone cells/skeleton to optimize the application of EMF on bone diseases/injuries. Bioelectromagnetics. 2020;41:263-278 © 2020 Bioelectromagnetics Society.
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Affiliation(s)
- Bin Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Wound Repair and Rehabilitation, Center of Bone Metabolism and Repair, Trauma Center, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China.,Center of Rehabilitation, Xingcheng Sanatorium of PLA Strategic Support Force, Xingcheng, China
| | - Yangli Xie
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Wound Repair and Rehabilitation, Center of Bone Metabolism and Repair, Trauma Center, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Zhenhong Ni
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Wound Repair and Rehabilitation, Center of Bone Metabolism and Repair, Trauma Center, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Lin Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Wound Repair and Rehabilitation, Center of Bone Metabolism and Repair, Trauma Center, Research Institute of Surgery, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China
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19
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Suryani L, Too JH, Hassanbhai AM, Wen F, Lin DJ, Yu N, Teoh SH. Effects of Electromagnetic Field on Proliferation, Differentiation, and Mineralization of MC3T3 Cells. Tissue Eng Part C Methods 2020; 25:114-125. [PMID: 30661463 DOI: 10.1089/ten.tec.2018.0364] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
IMPACT STATEMENT We present the study about how the parameters of pulsed electromagnetic field (PEMF) stimulus affected calvarial osteoblast precursor cell in terms of growth, viability, and differentiation. This research provides insight and foundation to clinical application of noninvasive therapy using PEMF to improve bone regeneration.
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Affiliation(s)
- Luvita Suryani
- 1 School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.,2 Centre for Developmental Biology, Tissue Engineering, Regenerative Medicine and Innovation, Singapore, Singapore
| | - Jian Hui Too
- 3 National Dental Centre Singapore, Singapore, Singapore
| | - Ammar Mansoor Hassanbhai
- 1 School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.,2 Centre for Developmental Biology, Tissue Engineering, Regenerative Medicine and Innovation, Singapore, Singapore
| | - Feng Wen
- 1 School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.,2 Centre for Developmental Biology, Tissue Engineering, Regenerative Medicine and Innovation, Singapore, Singapore
| | - Daryl Jimian Lin
- 1 School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Na Yu
- 3 National Dental Centre Singapore, Singapore, Singapore.,4 Duke-NUS Medical School Singapore, Singapore, Singapore
| | - Swee-Hin Teoh
- 1 School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.,2 Centre for Developmental Biology, Tissue Engineering, Regenerative Medicine and Innovation, Singapore, Singapore.,5 Lee Kong Chian School of Medicine Singapore, Singapore, Singapore
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20
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Li YH, Zhu D, Cao Z, Liu Y, Sun J, Tan L. Primary cilia respond to intermittent low-magnitude, high-frequency vibration and mediate vibration-induced effects in osteoblasts. Am J Physiol Cell Physiol 2020; 318:C73-C82. [PMID: 31577514 DOI: 10.1152/ajpcell.00273.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Our objective was to investigate the role of primary cilia in low-magnitude, high-frequency vibration (LMHFV) treatment of MC3T3-E1 osteoblasts (OBs). We used chloral hydrate (CH), which has a well-characterized function in chemically removing primary cilia, to elucidate the role of primary cilia in LMHFV-induced OB osteogenic responses through cell viability assay, Western blot analysis, real-time quantitative RT-PCR, and histochemical staining methods. We observed a significant, 30% decrease in the number of MC3T3-E1 OBs with primary cilia (reduced from 64.3 ± 5%) and an approximately 50% reduction in length of primary cilia (reduced from 3 ± 0.8 μm) after LMHFV stimulation. LMHFV stimulation upregulated protein expression of the bone matrix markers collagen 1 (COL-1), osteopontin (OPN), and osteoclacin(OCN) in MC3T3-E1 OBs, indicating that LMHFV induces osteogenesis. High-concentration or long-duration CH exposure resulted in inhibition of MC3T3-E1 OB survival. In addition, Western blot analysis and RT-PCR revealed that CH treatment prevented LMHFV-induced osteogenesis. Furthermore, decreased alkaline phosphate activity, reduced OB differentiation, mineralization, and maturation were observed in CH-pretreated and LMHFV-treated OBs. We showed that LMHFV induces morphological changes in primary cilia that may fine-tune their mechanosensitivity. In addition, we demonstrated the significant inhibition by CH of LMHFV-induced OB mineralization, maturation, and differentiation, which might reveal the critical role of primary cilia in the process.
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Affiliation(s)
- Yan-Hui Li
- Department of Cardiology and Echocardiography, The First Hospital of Jilin University, Changchun, China
| | - Dong Zhu
- Department of Orthopedic Trauma, The First Hospital of Jilin University, Changchun, China
| | - Zongbing Cao
- Department of Orthopedic Trauma, The First Hospital of Jilin University, Changchun, China
| | - Yanwei Liu
- Department of Orthopedic Trauma, The First Hospital of Jilin University, Changchun, China
| | - Jian Sun
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Lei Tan
- Department of Orthopedic Trauma, The First Hospital of Jilin University, Changchun, China
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21
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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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22
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Galli C, Colangelo M, Pedrazzi G, Guizzardi S. The Response of Osteoblasts and Bone to Sinusoidal Electromagnetic Fields: Insights from the Literature. Calcif Tissue Int 2019; 105:127-147. [PMID: 30997574 DOI: 10.1007/s00223-019-00554-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 04/11/2019] [Indexed: 12/23/2022]
Abstract
Electromagnetic fields (EMFs) have been proposed as a tool to ameliorate bone formation and healing. Despite their promising results, however, they have failed to enter routine clinical protocols to treat bone conditions where higher bone mass has to be achieved. This is no doubt also due to a fundamental lack of knowledge and understanding on their effects and the optimal settings for attaining the desired therapeutic effects. This review analysed the available in vitro and in vivo studies that assessed the effects of sinusoidal EMFs (SEMFs) on bone and bone cells, comparing the results and investigating possible mechanisms of action by which SEMFs interact with tissues and cells. The effects of SEMFs on bone have not been as thoroughly investigated as pulsed EMFs; however, abundant evidence shows that SEMFs affect the proliferation and differentiation of osteoblastic cells, acting on multiple cellular mechanisms. SEMFs have also proven to increase bone mass in rodents under normal conditions and in osteoporotic animals.
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Affiliation(s)
- C Galli
- Department of Medicine and Surgery, University of Parma, Parma, Italy.
| | - M Colangelo
- Department of Medicine and Surgery, Histology and Embryology Lab, University of Parma, Parma, Italy
| | - G Pedrazzi
- Department of Medicine and Surgery, Neuroscience Unit, University of Parma, Via Volturno 39, 43126, Parma, Italy
| | - S Guizzardi
- Department of Medicine and Surgery, Histology and Embryology Lab, University of Parma, Parma, Italy
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23
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Zhou J, Gao YH, Zhu BY, Shao JL, Ma HP, Xian CJ, Chen KM. Sinusoidal Electromagnetic Fields Increase Peak Bone Mass in Rats by Activating Wnt10b/β-Catenin in Primary Cilia of Osteoblasts. J Bone Miner Res 2019; 34:1336-1351. [PMID: 30779853 DOI: 10.1002/jbmr.3704] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/31/2019] [Accepted: 02/12/2019] [Indexed: 12/22/2022]
Abstract
Extremely low-frequency electromagnetic fields have been considered a potential candidate for the prevention and treatment of osteoporosis; however, their action mechanism and optimal magnetic flux density (intensity) parameter are still elusive. The present study found that 50-Hz sinusoidal electromagnetic fields (SEMFs) at 1.8 mT increased the peak bone mass of young rats by increasing bone formation. Gene array expression studies with femoral bone samples showed that SEMFs increased the expression levels of collagen-1α1 and Wnt10b, a critical ligand of the osteogenic Wnt/β-catenin pathway. Consistently, SEMFs promoted osteogenic differentiation and maturation of rat calvarial osteoblasts (ROBs) in vitro through activating the Wnt10b/β-catenin pathway. This osteogenesis-promoting effect of SEMFs via Wnt10b/β-catenin signaling was found to depend on the functional integrity of primary cilia in osteoblasts. When the primary cilia were abrogated by small interfering RNA (siRNA) targeting IFT88, the ability of SEMFs to promote the osteogenic differentiation of ROBs through activating Wnt10b/β-catenin signaling was blocked. Although the knockdown of Wnt10b expression with RNA interference had no effect on primary cilia, it significantly suppressed the promoting effect of SEMFs on osteoblastic differentiation/maturation. Wnt10b was normally localized at the bases of primary cilia, but it disappeared (or was released) from the cilia upon SEMF treatment. Interestingly, primary cilia were elongated to different degrees by different intensities of 50-Hz SEMFs, with the window effect observed at 1.8 mT, and the expression level of Wnt10b increased in accord with the lengths of primary cilia. These results indicate that 50-Hz 1.8-mT SEMFs increase the peak bone mass of growing rats by promoting osteogenic differentiation/maturation of osteoblasts, which is mediated, at least in part, by Wnt10b at the primary cilia and the subsequent activation of Wnt/β-catenin signaling. © 2019 American Society for Bone and Mineral Research.
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Affiliation(s)
- Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital, CPLA, Lanzhou 730050, People's Republic of China
| | - Yu-Hai Gao
- Institute of Orthopaedics, Lanzhou General Hospital, CPLA, Lanzhou 730050, People's Republic of China
| | - Bao-Ying Zhu
- Institute of Orthopaedics, Lanzhou General Hospital, CPLA, Lanzhou 730050, People's Republic of China
| | - Jia-Le Shao
- Institute of Orthopaedics, Lanzhou General Hospital, CPLA, Lanzhou 730050, People's Republic of China
| | - Hui-Ping Ma
- Department of Pharmacy, Lanzhou General Hospital, CPLA, Lanzhou 730050, People's Republic of China
| | - Cory J Xian
- School of Pharmacy and Medical Sciences, and UniSA Cancer Research Institute, University of South Australia, Adelaide, SA 5001, Australia
| | - Ke-Ming Chen
- Institute of Orthopaedics, Lanzhou General Hospital, CPLA, Lanzhou 730050, People's Republic of China
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24
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Bao Z, Fan M, Ma L, Duan Q, Jiang W. The effects of pulsed electromagnetic fields combined with a static magnetic intramedullary implant on the repair of bone defects: A preliminary study. Electromagn Biol Med 2019; 38:210-217. [PMID: 31155966 DOI: 10.1080/15368378.2019.1625785] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
There is a basic consensus on the biological effects of pulsed electromagnetic fields (PEMFs) on bone formation and bone reconstruction. PEMFs have been widely used in clinical treatment of osteoporosis, bone nonunion and delayed fracture healing. PEMFs is an intervention method of physiotherapy in vitro. In order to optimize the effect of PEMFs intervention, this study combined with the orthopedics clinic to construct a static magnetic intramedullary implant using NdFeB magnets as components. At the same time, it combines external-pulsed electromagnetic field to achieve locally targeted magnetic microenvironment. Rabbits were randomly divided into a combined magnetic field group (Implantation of static magnetic intramedullary implant in vivo combined with external-pulsed electromagnetic field), pulsed electromagnetic field group and control group. Micro CT and histopathology were used to estimate the effect of each group on bone formation and reconstruction in the early stage (5 weeks) of bone defect repair. Our data showed that the combined magnetic field group had relatively better new bone volume and trabecular structure in the bone defect area. The results showed that the combined magnetic field intervention method was feasible and had relatively preferably osteogenesis promoting effect. This study provides a new idea of magnetic field intervention, and also preliminarily verifies the feasibility of adding magnetic field to traditional orthopedic implant materials. However, the magnetic field strength of implanted materials still needs to be further refined.
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Affiliation(s)
- Zheheng Bao
- a Orthopedic Department , Tianjin First Center Hospital , Tianjin , China
| | - Meng Fan
- a Orthopedic Department , Tianjin First Center Hospital , Tianjin , China
| | - Le Ma
- a Orthopedic Department , Tianjin First Center Hospital , Tianjin , China
| | - Qucheng Duan
- a Orthopedic Department , Tianjin First Center Hospital , Tianjin , China
| | - Wenxue Jiang
- a Orthopedic Department , Tianjin First Center Hospital , Tianjin , China
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25
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Shi W, Ma Z, Zhang G, Wang C, Jiao Z. Novel functions of the primary cilium in bone disease and cancer. Cytoskeleton (Hoboken) 2019; 76:233-242. [PMID: 31108028 DOI: 10.1002/cm.21529] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 05/15/2019] [Accepted: 05/16/2019] [Indexed: 11/09/2022]
Abstract
The primary cilium, a sensory organelle that emanates from the cell surface of most mammalian cell types during growth arrest, has attracted the attention of many researchers over the past decade. Recently, a large number of new findings have assigned novel functions and roles to the primary cilium in signal transduction and related diseases, which has greatly augmented the importance of the cilium in human health and development. Here, we review emerging evidence supporting the primary cilium as a sensory organelle in signal transduction in microgravity, electromagnetic field sensing, chemosensation and tumorigenesis. We also present an overview of signal transduction crosstalk associated with the primary cilium in bone disease and cancer, including primary cilium-related Ca2+ signaling, parathyroid hormone signaling, cAMP signaling, BMP/Smad1/5/8 signaling and Wnt signaling. We anticipate that emerging discoveries about the function of the primary cilium will provide novel insight into the molecular mechanisms of stimulus sensation, signal transduction and pathogenesis.
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Affiliation(s)
- Wengui Shi
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, People's Republic of China
| | - Zhijian Ma
- The First Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, People's Republic of China
| | - Gengyuan Zhang
- The First Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, People's Republic of China
| | - Chen Wang
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, People's Republic of China.,The First Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, People's Republic of China
| | - Zuoyi Jiao
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, People's Republic of China.,The First Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, People's Republic of China
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26
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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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27
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Wang YY, Pu XY, Shi WG, Fang QQ, Chen XR, Xi HR, Gao YH, Zhou J, Xian CJ, Chen KM. Pulsed electromagnetic fields promote bone formation by activating the sAC-cAMP-PKA-CREB signaling pathway. J Cell Physiol 2019; 234:2807-2821. [PMID: 30067871 DOI: 10.1002/jcp.27098] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 06/28/2018] [Indexed: 02/06/2023]
Abstract
The application of pulsed electromagnetic fields (PEMFs) in the prevention and treatment of osteoporosis has long been an area of interest. However, the clinical application of PEMFs remains limited because of the poor understanding of the PEMF action mechanism. Here, we report that PEMFs promote bone formation by activating soluble adenylyl cyclase (sAC), cyclic adenosine monophosphate (cAMP), protein kinase A (PKA), and cAMP response element-binding protein (CREB) signaling pathways. First, it was found that 50 Hz 0.6 millitesla (mT) PEMFs promoted osteogenic differentiation of rat calvarial osteoblasts (ROBs), and that PEMFs activated cAMP-PKA-CREB signaling by increasing intracellular cAMP levels, facilitating phosphorylation of PKA and CREB, and inducing nuclear translocation of phosphorylated (p)-CREB. Blocking the signaling by adenylate cyclase (AC) and PKA inhibitors both abolished the osteogenic effect of PEMFs. Second, expression of sAC isoform was found to be increased significantly by PEMF treatment. Blocking sAC using sAC-specific inhibitor KH7 dramatically inhibited the osteogenic differentiation of ROBs. Finally, the peak bone mass of growing rats was significantly increased after 2 months of PEMF treatment with 90 min/day. The serum cAMP content, p-PKA, and p-CREB as well as the sAC protein expression levels were all increased significantly in femurs of treated rats. The current study indicated that PEMFs promote bone formation in vitro and in vivo by activating sAC-cAMP-PKA-CREB signaling pathway of osteoblasts directly or indirectly.
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Affiliation(s)
- Yuan-Yuan Wang
- Department of Bioengineering, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Xiu-Ying Pu
- Department of Bioengineering, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Wen-Gui Shi
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Qing-Qing Fang
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Xin-Ru Chen
- Department of Biology, College of Life Sciences, Northwest A & F University, Yanglin, China
| | - Hui-Rong Xi
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Yu-Hai Gao
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Cory J Xian
- Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Ke-Ming Chen
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
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28
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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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29
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Li WY, Li XY, Tian YH, Chen XR, Zhou J, Zhu BY, Xi HR, Gao YH, Xian CJ, Chen KM. Pulsed electromagnetic fields prevented the decrease of bone formation in hindlimb-suspended rats by activating sAC/cAMP/PKA/CREB signaling pathway. Bioelectromagnetics 2018; 39:569-584. [PMID: 30350869 DOI: 10.1002/bem.22150] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 09/30/2018] [Indexed: 12/21/2022]
Abstract
Microgravity is one of the main threats to the health of astronauts. Pulsed electromagnetic fields (PEMFs) have been considered as one of the potential countermeasures for bone loss induced by space flight. However, the optimal therapeutic parameters of PEMFs have not been obtained and the action mechanism is still largely unknown. In this study, a set of optimal therapeutic parameters for PEMFs (50 Hz, 0.6 mT 50% duty cycle and 90 min/day) selected based on high-throughput screening with cultured osteoblasts was used to prevent bone loss in rats induced by hindlimb suspension, a commonly accepted animal model to simulate the space environment. It was found that hindlimb suspension for 4 weeks led to significant decreases in femoral and vertebral bone mineral density (BMD) and their maximal loads, severe deterioration in bone micro-structure, and decreases in levels of bone formation markers and increases in bone resorption markers. PEMF treatment prevented about 50% of the decreased BMD and maximal loads, preserved the microstructure of cancellous bone and thickness of cortical bone, and inhibited decreases in bone formation markers. Histological analyses revealed that PEMFs significantly alleviated the reduction in osteoblast number and inhibited the increase in adipocyte number in the bone marrow. PEMFs also blocked decreases in serum levels of parathyroid hormone and its downstream signal molecule cAMP, and maintained the phosphorylation levels of protein kinase A (PKA) and cAMP response element-binding protein (CREB). The expression level of soluble adenylyl cyclases (sAC) was also maintained. It therefore can be concluded that PEMFs partially prevented the bone loss induced by weightless environment by maintaining bone formation through signaling of the sAC/cAMP/PKA/CREB pathway. Bioelectromagnetics. 39:569-584, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Wen-Yuan Li
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China.,Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Xue-Yan Li
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Yong-Hui Tian
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Xin-Ru Chen
- College of Life Sciences, Northwest A & F University, Yanglin, China
| | - Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Bao-Ying Zhu
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Hui-Rong Xi
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Yu-Hai Gao
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Cory J Xian
- Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Ke-Ming Chen
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
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30
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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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31
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Xia Y, Sun J, Zhao L, Zhang F, Liang XJ, Guo Y, Weir MD, Reynolds MA, Gu N, Xu HHK. Magnetic field and nano-scaffolds with stem cells to enhance bone regeneration. Biomaterials 2018; 183:151-170. [PMID: 30170257 DOI: 10.1016/j.biomaterials.2018.08.040] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/10/2018] [Accepted: 08/20/2018] [Indexed: 12/20/2022]
Abstract
Novel strategies utilizing magnetic nanoparticles (MNPs) and magnetic fields are being developed to enhance bone tissue engineering efficacy. This article first reviewed cutting-edge research on the osteogenic enhancements via magnetic fields and MNPs. Then the current developments in magnetic strategies to improve the cells, scaffolds and growth factor deliveries were described. The magnetic-cell strategies included cell labeling, targeting, patterning, and gene modifications. MNPs were incorporated to fabricate magnetic composite scaffolds, as well as to construct delivery systems for growth factors, drugs and gene transfections. The novel methods using magnetic nanoparticles and scaffolds with magnetic fields and stem cells increased the osteogenic differentiation, angiogenesis and bone regeneration by 2-3 folds over those of the controls. The mechanisms of magnetic nanoparticles and scaffolds with magnetic fields and stem cells to enhance bone regeneration were identified as involving the activation of signaling pathways including MAPK, integrin, BMP and NF-κB. Potential clinical applications of magnetic nanoparticles and scaffolds with magnetic fields and stem cells include dental, craniofacial and orthopedic treatments with substantially increased bone repair and regeneration efficacy.
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Affiliation(s)
- Yang Xia
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu 210029, China; Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China; Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Jianfei Sun
- Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China
| | - Liang Zhao
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Orthopedic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Feimin Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu 210029, China; Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, Jiangsu 215123, China
| | - Xing-Jie Liang
- Chinese Academy of Sciences (CAS) Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yu Guo
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Michael D Weir
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mark A Reynolds
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Ning Gu
- Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China; Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou, Jiangsu 215123, China.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences & Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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32
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Zhu BY, Yang ZD, Chen XR, Zhou J, Gao YH, Xian CJ, Chen KM. Exposure Duration Is a Determinant of the Effect of Sinusoidal Electromagnetic Fields on Peak Bone Mass of Young Rats. Calcif Tissue Int 2018; 103:95-106. [PMID: 29362823 DOI: 10.1007/s00223-018-0396-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 01/17/2018] [Indexed: 11/26/2022]
Abstract
We proposed a three-step strategy to obtain the optimal therapeutic parameters, which is composed of large-scale screening at cellular level, verification in animal experiments, and confirmation by a clinical trial. The objective of the current study was to test the feasibility of our strategy. Newborn rat calvarial osteoblasts were treated by 50 Hz 1.8 mT sinusoidal electromagnetic fields (SEMFs) with 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 h/days, respectively. The osteogenic differentiation and maturation of the osteoblast were assayed and compared to obtain the optimal duration. One-month-old growing rats were then treated by the same SEMFs with 0.5, 1.5, and 2.5 h/days, respectively, and the peak bone mass was analyzed after 2 months. It was found that the optimal exposure duration to promote the osteogenic differentiation and maturation of osteoblasts was 1.5 h/days, judging by the increasing degrees of ALP activity, calcified nodules formed, the gene and protein expression levels of Runx-2, BMP-2, and Col-I, as well as the expression levels of signaling proteins of the BMP-2/Smad1/5/8 pathway. The highest increase of peak bone mass after 2 months was also obtained by 1.5 h/days, judging by the results of X-ray dual-energy absorptiometry, mechanical property analysis, micro-CT scanning, and serum bone turnover marker examinations. The above results indicated that exposure duration is a determinant for the therapeutic effect of EMFs, and the optimal therapeutic effects only can be obtained by the optimal exposure duration.
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Affiliation(s)
- B Y Zhu
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, 730050, People's Republic of China
| | - Z D Yang
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, People's Republic of China.
| | - X R Chen
- College of Life Sciences, Northwest A & F University, Yanglin, 712100, People's Republic of China
| | - J Zhou
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, 730050, People's Republic of China
| | - Y H Gao
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, 730050, People's Republic of China
| | - C J Xian
- Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, 5001, Australia
| | - K M Chen
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, 730050, People's Republic of China.
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Shuai C, Yang W, Peng S, Gao C, Guo W, Lai Y, Feng P. Physical stimulations and their osteogenesis-inducing mechanisms. Int J Bioprint 2018; 4:138. [PMID: 33102916 PMCID: PMC7581999 DOI: 10.18063/ijb.v4i2.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 05/09/2018] [Indexed: 12/27/2022] Open
Abstract
Physical stimulations such as magnetic, electric and mechanical stimulation could enhance cell activity and promote bone formation in bone repair process via activating signal pathways, modulating ion channels, regulating bonerelated gene expressions, etc. In this paper, bioeffects of physical stimulations on cell activity, tissue growth and bone healing were systematically summarized, which especially focused on their osteogenesis-inducing mechanisms. Detailedly, magnetic stimulation could produce Hall effect which improved the permeability of cell membrane and promoted the migration of ions, especially accelerating the extracellular calcium ions to pass through cell membrane. Electric stimulation could induce inverse piezoelectric effect which generated electric signals, accordingly up-regulating intracellular calcium levels and growth factor synthesis. And mechanical stimulation could produce mechanical signals which were converted into corresponding biochemical signals, thus activating various signaling pathways on cell membrane and inducing a series of gene expressions. Besides, bioeffects of physical stimulations combined with bone scaffolds which fabricated using 3D printing technology on bone cells were discussed. The equipments of physical stimulation system were described. The opportunities and challenges of physical stimulations were also presented from the perspective of bone repair.
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Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China.,Jiangxi University of Science and Technology, Ganzhou, China.,Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, China
| | - Wenjing Yang
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Shuping Peng
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Wang Guo
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Yuxiao Lai
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, China
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
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34
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Unsdorfer KML, Abdelmagid SM. Percutaneous Kirschner Wire Repair of Failed Digital Arthrodesis Using Pulsed Electromagnetic Field Therapy A Case Report. J Am Podiatr Med Assoc 2018; 108:77-80. [PMID: 29547026 DOI: 10.7547/16-007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A case of a repaired failed toe arthrodesis is presented. A novel and previously unreported approach using a percutaneously placed Kirschner wire coupled with a pulsed electromagnetic field achieved healing of a painful pseudoarthrosis at 54 days. With a percutaneous technique, open debridement of the failed arthrodesis site can be avoided.
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Affiliation(s)
| | - Samir M. Abdelmagid
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH
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35
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Shi W, Gao Y, Wang Y, Zhou J, Wei Z, Ma X, Ma H, Xian CJ, Wang J, Chen K. The flavonol glycoside icariin promotes bone formation in growing rats by activating the cAMP signaling pathway in primary cilia of osteoblasts. J Biol Chem 2017; 292:20883-20896. [PMID: 29089388 PMCID: PMC5743065 DOI: 10.1074/jbc.m117.809517] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/29/2017] [Indexed: 11/06/2022] Open
Abstract
Icariin, a prenylated flavonol glycoside isolated from the herb Epimedium, has been considered as a potential alternative therapy for osteoporosis. Previous research has shown that, unlike other flavonoids, icariin is unlikely to act via the estrogen receptor, but its exact mechanism of action is unknown. In this study, using rat calvarial osteoblast culture and rat bone growth models, we demonstrated that icariin promotes bone formation by activating the cAMP/protein kinase A (PKA)/cAMP response element-binding protein (CREB) pathway requiring functional primary cilia of osteoblasts. We found that icariin increases the peak bone mass attained by young rats and promotes the maturation and mineralization of rat calvarial osteoblasts. Icariin activated cAMP/PKA/CREB signaling of the osteoblasts by increasing intracellular cAMP levels and facilitating phosphorylation of both PKA and CREB. Blocking cAMP/PKA/CREB signaling with inhibitors of the cAMP-synthesizing adenylyl cyclase (AC) and PKA inhibitors significantly inhibited the osteogenic effect of icariin in the osteoblasts. Icariin-activated cAMP/PKA/CREB signaling was localized to primary cilia, as indicated by localization of soluble AC and phosphorylated PKA. Furthermore, blocking ciliogenesis via siRNA knockdown of a cilium assembly protein, IFT88, inhibited icariin-induced PKA and CREB phosphorylation and also abolished icariin's osteogenic effect. Finally, several of these outcomes were validated in icariin-treated rats. Together, these results provide new insights into icariin function and its mechanisms of action and strengthen existing ties between cAMP-mediated signaling and osteogenesis.
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Affiliation(s)
| | - Yuhai Gao
- From the Institute of Orthopaedics and
| | | | - Jian Zhou
- From the Institute of Orthopaedics and
| | | | - Xiaoni Ma
- From the Institute of Orthopaedics and
| | - Huiping Ma
- the Department of Pharmacy, Lanzhou General Hospital of CPLA, Lanzhou 730050, China
| | - Cory J Xian
- the Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia, and
| | - Jufang Wang
- the Key Laboratory of Space Radiobiology of Gansu Province, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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36
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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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37
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Shi W, Xie Y, He J, Zhou J, Gao Y, Wei W, Ding N, Ma H, Xian CJ, Chen K, Wang J. Microgravity induces inhibition of osteoblastic differentiation and mineralization through abrogating primary cilia. Sci Rep 2017; 7:1866. [PMID: 28500304 PMCID: PMC5431935 DOI: 10.1038/s41598-017-02049-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 04/05/2017] [Indexed: 12/17/2022] Open
Abstract
It is well documented that microgravity in space environment leads to bone loss in astronauts. These physiological changes have also been validated by human and animal studies and modeled in cell-based analogs. However, the underlying mechanisms are elusive. In the current study, we identified a novel phenomenon that primary cilia (key sensors and functioning organelles) of rat calvarial osteoblasts (ROBs) gradually shrank and disappeared almost completely after exposure to simulated microgravity generated by a random positioning machine (RPM). Along with the abrogation of primary cilia, the differentiation, maturation and mineralization of ROBs were inhibited. We also found that the disappearance of primary cilia was prevented by treating ROBs with cytochalasin D, but not with LiCl or dynein light chain Tctex-type 1 (Dynlt1) siRNA. The repression of the differentiation, maturation and mineralization of ROBs was effectively offset by cytochalasin D treatment in microgravity conditions. Blocking ciliogenesis using intraflagellar transport protein 88 (IFT88) siRNA knockdown inhibited the ability of cytochalasin D to counteract this reduction of osteogenesis. These results indicate that the abrogation of primary cilia may be responsible for the microgravity's inhibition on osteogenesis. Reconstruction of primary cilia may become a potential strategy against bone loss induced by microgravity.
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Affiliation(s)
- Wengui Shi
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanfang Xie
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou, 730050, P. R. China
| | - Jinpeng He
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou, 730050, P. R. China
| | - Yuhai Gao
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou, 730050, P. R. China
| | - Wenjun Wei
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Nan Ding
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Huiping Ma
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou, 730050, P. R. China
| | - Cory J Xian
- Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia
| | - Keming Chen
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou, 730050, P. R. China.
| | - Jufang Wang
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.
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38
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Liu M, Lee C, Laron D, Zhang N, Waldorff EI, Ryaby JT, Feeley B, Liu X. Role of pulsed electromagnetic fields (PEMF) on tenocytes and myoblasts-potential application for treating rotator cuff tears. J Orthop Res 2017; 35:956-964. [PMID: 27138553 DOI: 10.1002/jor.23278] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/25/2016] [Indexed: 02/04/2023]
Abstract
The post-surgery integrity of the tendons and muscle quality are the two major factors in success of rotator cuff (RC) repair. Though surgical techniques for rotator cuff repair have significantly improved in the past two decades, there are no effective treatments to improve tendon-to-bone healing and muscle quality after repair at this point in time. Pulsed electromagnetic fields (PEMF) have previously been used for promoting fracture healing. Previous studies have shown that PEMF has a positive role in promoting osteoblast precursors proliferation and differentiation. However, PEMFs effect on tenocytes and muscle cells has not been determined fully yet. The purpose of this study is to define the role of a commercially available PEMF on tenocytes and myoblasts growth and differentiation in vitro. Human rotator cuff tenocytes and C2C12 murine myoblasts were cultured and treated with PEMF for 2 weeks under regular and inflammatory conditions. Our results showed that 2 weeks treatment of PEMF enhanced gene expressions of growth factors in human rotator cuff tenocytes under inflammatory conditions. PEMF significantly enhanced C2C12 myotube formation under normal and inflammatory conditions. Results from this study suggest that PEMF has a positive role in promoting tenocyte gene expression and myoblast differentiation. Therefore, PEMF may potentially serve as a non-operative treatment to improve clinical incomes rotator cuff tendon repairs. Results © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:956-964, 2017.
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Affiliation(s)
- Mengyao Liu
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, 1700 Owens Street, Room 364, San Francisco, California, 94153.,Department of Orthopaedic Surgery, University of California, San Francisco, California
| | - Carlin Lee
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, 1700 Owens Street, Room 364, San Francisco, California, 94153.,Department of Orthopaedic Surgery, University of California, San Francisco, California
| | - Dominique Laron
- Department of Orthopaedic Surgery, University of California, San Francisco, California
| | | | | | | | - Brian Feeley
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, 1700 Owens Street, Room 364, San Francisco, California, 94153.,Department of Orthopaedic Surgery, University of California, San Francisco, California
| | - Xuhui Liu
- Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, 1700 Owens Street, Room 364, San Francisco, California, 94153.,Department of Orthopaedic Surgery, University of California, San Francisco, California
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39
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Lima RADO, Freire APCF, Guimarães A, Santos CP, Pacagnelli FL. Effectiveness of Russian current in bone regeneration process in rats. FISIOTERAPIA EM MOVIMENTO 2017. [DOI: 10.1590/1980-5918.030.002.ao13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abstract Introduction: Russian current is an electric current of average frequency that is able to restore the properties of skeletal muscle at a low treatment cost. It is essential to know the effects of Russian current in bone tissue, since electromagnetic energy could be an efficient and low cost method to treat bone disorders. Objective: The aim of the study was to evaluate the effectiveness of Russian current in the consolidation of tibia fracture in adult rats. Methods: 24 adult male Albinus Wistar rats wereused. The animals were divided randomly into two groups: control group (CG), composed of 12 animals, and Intervention Group (IG) consisting of 12 animals, both groups were submitted to osteotomy (proximal medial surface of the tibia). The IG underwent an electrical stimulation protocol with Russian current, while the CG did not undergo any kind of intervention. Euthanasia was performed in three animals of each group on the following days: 5, 10, 20, and 30 days of treatment. Results: The results suggested higher primary ossification, intense osteogenic activity, and increased thickness of the periosteum, characterizing more advanced ossification and a greater presence of trabecular bone marrow in rats in the group subjected to the treatment. In this way, we can assign one more beneficial effect to interventions with Russian current, for the treatment of postfracture rehabilitation. Conclusion: In both groups the bone tissue repair process occurred, but in the electrically stimulated group the osteogenesis process was more advanced.
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Affiliation(s)
| | | | - Alcides Guimarães
- Universidade do Oeste Paulista, Brazil; Universidade Estadual de Campinas, Brazil
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40
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Enhancement of osteogenic differentiation of rat adipose tissue-derived mesenchymal stem cells by zinc sulphate under electromagnetic field via the PKA, ERK1/2 and Wnt/β-catenin signaling pathways. PLoS One 2017; 12:e0173877. [PMID: 28339498 PMCID: PMC5365128 DOI: 10.1371/journal.pone.0173877] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Accepted: 02/28/2017] [Indexed: 01/22/2023] Open
Abstract
Zinc ion as an essential trace element and electromagnetic fields (EMFs) has been reported to be involved in the regulation of bone metabolism. The aim of this study was to elucidate the effects of zinc sulphate (ZnSO4) on the osteogenic differentiation of adipose tissue-derived mesenchymal stem cells (ADSCs) in the presence of EMF as a strategy in osteoporosis therapy. Alkaline phophatase (ALP) activity measurement, calcium assay and expression of several osteoblastic marker genes were examined to assess the effect of ZnSO4 on the osteogenic differentiation of ADSCs under EMF. The expression of cAMP and PKA was evaluated by ELISA. The expression of β-catenin, Wnt1, Wnt3a, low-density lipoprotein receptor-related protein 5 (LRP5) and reduced dickkopf1 (DKK1) genes were used to detect the Wnt/β-catenin pathway. It was found that ZnSO4, in the presence of EMF, resulted in an increase in the expression of osteogenic genes, ALP activity and calcium levels. EMF, in the presence of ZnSO4, increased the cAMP level and protein kinase A (PKA) activity. Treatment of ADSCs with (MAPK)/ERK kinase 1/2 inhibitor, or PKA inhibitor, significantly inhibited the promotion of osteogenic markers, indicating that the induction of osteogenesis was dependent on the ERK and PKA signaling pathways. Real-time PCR analysis showed that ZnSO4, in the presence of EMF, increased the mRNA expressions of β-catenin, Wnt1, Wnt3a, LRP5 and DKK1. In this study, it was shown that 0.432 μg/ml ZnSO4, in the presence of 50 Hz, 20 mT EMF, induced the osteogenic differentiation of ADSCs via PKA, ERK1/2 and Wnt/β-catenin signaling pathways.
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41
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Xie YF, Shi WG, Zhou J, Gao YH, Li SF, Fang QQ, Wang MG, Ma HP, Wang JF, Xian CJ, Chen KM. Pulsed electromagnetic fields stimulate osteogenic differentiation and maturation of osteoblasts by upregulating the expression of BMPRII localized at the base of primary cilium. Bone 2016; 93:22-32. [PMID: 27622883 DOI: 10.1016/j.bone.2016.09.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 09/06/2016] [Accepted: 09/09/2016] [Indexed: 12/21/2022]
Abstract
Pulsed electromagnetic fields (PEMFs) have been considered as a potential candidate for the prevention and treatment of osteoporosis, however, the mechanism of its action is still elusive. We have previously reported that 50Hz 0.6mT PEMFs stimulate osteoblastic differentiation and mineralization in a primary cilium- dependent manner, but did not know the reason. In the current study, we found that the PEMFs promoted osteogenic differentiation and maturation of rat calvarial osteoblasts (ROBs) by activating bone morphogenetic protein BMP-Smad1/5/8 signaling on the condition that primary cilia were normal. Further studies revealed that BMPRII, the primary binding receptor of BMP ligand, was readily and strongly upregulated by PEMF treatment and localized at the bases of primary cilia. Abrogation of primary cilia with small interfering RNA sequence targeting IFT88 abolished the PEMF-induced upregulation of BMPRII and its ciliary localization. Knockdown of BMPRII expression level with RNA interference had no effects on primary cilia but significantly decreased the promoting effect of PEMFs on osteoblastic differentiation and maturation. These results indicated that PEMFs stimulate osteogenic differentiation and maturation of osteoblast by primary cilium-mediated upregulation of BMPRII expression and subsequently activation of BMP-Smad1/5/8 signaling, and that BMPRII is the key component linking primary cilium and BMP-Smad1/5/8 pathway. This study has thus revealed the molecular mechanism for the osteogenic effect of PEMFs.
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Affiliation(s)
- Yan-Fang Xie
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
| | - Wen-Gui Shi
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
| | - Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
| | - Yu-Hai Gao
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
| | - Shao-Feng Li
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
| | - Qing-Qing Fang
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
| | - Ming-Gang Wang
- School of life science and engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China.
| | - Hui-Ping Ma
- Department of Pharmacy, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
| | - Ju-Fang Wang
- Gansu Key laboratory of Space Radiobiology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
| | - Cory J Xian
- Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia.
| | - Ke-Ming Chen
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
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42
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Choi YK, Urnukhsaikhan E, Yoon HH, Seo YK, Cho H, Jeong JS, Kim SC, Park JK. Combined effect of pulsed electromagnetic field and sound wave on In vitro and In vivo neural differentiation of human mesenchymal stem cells. Biotechnol Prog 2016; 33:201-211. [PMID: 27790871 DOI: 10.1002/btpr.2389] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 08/10/2016] [Indexed: 12/21/2022]
Abstract
Biophysical wave stimulus has been used as an effective tool to promote cellular maturation and differentiation in the construction of engineered tissue. Pulsed electromagnetic fields (PEMFs) and sound waves have been selected as effective stimuli that can promote neural differentiation. The aim of this study was to investigate the synergistic effect of PEMFs and sound waves on the neural differentiation potential in vitro and in vivo using human bone marrow mesenchymal stem cells (hBM-MSCs). In vitro, neural-related genes in hBM-MSCs were accelerated by the combined exposure to both waves more than by individual exposure to PEMFs or sound waves. The combined wave also up-regulated the expression of neural and synaptic-related proteins in a three-dimensional (3-D) culture system through the phosphorylation of extracellular signal-related kinase. In a mouse model of photochemically induced ischemia, exposure to the combined wave reduced the infarction volume and improved post-injury behavioral activity. These results indicate that a combined stimulus of biophysical waves, PEMFs and sound can enhance and possibly affect the differentiation of MSCs into neural cells. Our study is meaningful for highlighting the potential of combined wave for neurogenic effects and providing new therapeutic approaches for neural cell therapy. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 33:201-211, 2017.
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Affiliation(s)
- Yun-Kyong Choi
- Dept. of Medical Biotechnology, Dongguk University, Seoul, Korea
| | | | - Hee-Hoon Yoon
- Dongguk University Research Inst. of Biotechnology, Seoul, Korea
| | - Young-Kwon Seo
- Dept. of Medical Biotechnology, Dongguk University, Seoul, Korea
| | - Hyunjin Cho
- Dongguk University Research Inst. of Biotechnology, Seoul, Korea
| | - Jong-Seob Jeong
- Dept. of Medical Biotechnology, Dongguk University, Seoul, Korea
| | - Soo-Chan Kim
- Graduate School of Bio and Information Technology, Hankyong National University, Anseong-si, Kyonggi-do, Korea
| | - Jung-Keug Park
- Dept. of Medical Biotechnology, Dongguk University, Seoul, Korea
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43
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Cai S, Bodle JC, Mathieu PS, Amos A, Hamouda M, Bernacki S, McCarty G, Loboa EG. Primary cilia are sensors of electrical field stimulation to induce osteogenesis of human adipose-derived stem cells. FASEB J 2016; 31:346-355. [PMID: 27825103 DOI: 10.1096/fj.201600560r] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/28/2016] [Indexed: 12/28/2022]
Abstract
In this study, we report for the first time that the primary cilium acts as a crucial sensor for electrical field stimulation (EFS)-enhanced osteogenic response in osteoprogenitor cells. In addition, primary cilia seem to functionally modulate effects of EFS-induced cellular calcium oscillations. Primary cilia are organelles that have recently been implicated to play a crucial sensor role for many mechanical and chemical stimuli on stem cells. Here, we investigate the role of primary cilia in EFS-enhanced osteogenic response of human adipose-derived stem cells (hASCs) by knocking down 2 primary cilia structural proteins, polycystin-1 and intraflagellar protein-88. Our results indicate that structurally integrated primary cilia are required for detection of electrical field signals in hASCs. Furthermore, by measuring changes of cytoplasmic calcium concentration in hASCs during EFS, our findings also suggest that primary cilia may potentially function as a crucial calcium-signaling nexus in hASCs during EFS.-Cai, S., Bodle, J. C., Mathieu, P. S., Amos, A., Hamouda, M., Bernacki, S., McCarty, G., Loboa, E. G. Primary cilia are sensors of electrical field stimulation to induce osteogenesis of human adipose-derived stem cells.
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Affiliation(s)
- Shaobo Cai
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Josephine C Bodle
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and
| | - Pattie S Mathieu
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and
| | - Alison Amos
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and
| | - Mehdi Hamouda
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and
| | - Susan Bernacki
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and
| | - Greg McCarty
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and
| | - Elizabeth G Loboa
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina, USA; and .,College of Engineering, University of Missouri, Columbia, Missouri, USA
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Colciago A, Melfi S, Giannotti G, Bonalume V, Ballabio M, Caffino L, Fumagalli F, Magnaghi V. Tumor suppressor Nf2/merlin drives Schwann cell changes following electromagnetic field exposure through Hippo-dependent mechanisms. Cell Death Discov 2015; 1:15021. [PMID: 27551454 PMCID: PMC4979489 DOI: 10.1038/cddiscovery.2015.21] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 07/10/2015] [Indexed: 12/27/2022] Open
Abstract
Previous evidence showed mutations of the neurofibromin type 2 gene (Nf2), encoding the tumor suppressor protein merlin, in sporadic and vestibular schwannomas affecting Schwann cells (SCs). Accordingly, efforts have been addressed to identify possible factors, even environmental, that may regulate neurofibromas growth. In this context, we investigated the exposure of SC to an electromagnetic field (EMF), which is an environmental issue modulating biological processes. Here, we show that SC exposed to 50 Hz EMFs changes their morphology, proliferation, migration and myelinating capability. In these cells, merlin is downregulated, leading to activation of two intracellular signaling pathways, ERK/AKT and Hippo. Interestingly, SC changes their phenotype toward a proliferative/migrating state, which in principle may be pathologically relevant for schwannoma development.
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Affiliation(s)
- A Colciago
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - S Melfi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - G Giannotti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - V Bonalume
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - M Ballabio
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - L Caffino
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - F Fumagalli
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
| | - V Magnaghi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano , Via G. Balzaretti 9, Milan 20133, Italy
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Zhou J, Chen KM, Zhi DJ, Xie QJ, Xian CJ, Li HY. Effects of pyrite bioleaching solution of Acidithiobacillus ferrooxidans on viability, differentiation and mineralization potentials of rat osteoblasts. Arch Pharm Res 2015; 38:2228-40. [DOI: 10.1007/s12272-015-0650-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 08/08/2015] [Indexed: 11/30/2022]
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