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Pulsed electromagnetic field stimulates cellular proliferation in human intervertebral disc cells.

 Hwan-Mo Lee  ;  Un-Hye Kwon  ;  Hyang Kim  ;  Ho-Joong Kim  ;  Boram Kim  ;  Jin-Oh Park  ;  Eun-Soo Moon  ;  Seong-Hwan Moon 
 YONSEI MEDICAL JOURNAL, Vol.51(6) : 954-959, 2010 
Journal Title
Issue Date
Adult ; Aspirin/pharmacology ; Cell Proliferation/radiation effects* ; Collagen/metabolism ; Dinoprostone/metabolism ; Electromagnetic Fields* ; Enzyme Inhibitors/pharmacology ; Female ; Humans ; Intervertebral Disc/pathology* ; Intervertebral Disc/radiation effects ; Male ; Middle Aged ; Nitric Oxide/metabolism ; Tetrazolium Salts/pharmacology ; Thiazoles/pharmacology ; omega-N-Methylarginine/pharmacology
Electromagnetic fields ; intervertebral disc ; nitric oxide ; prostaglandin E2
PURPOSE: The purpose of this study is to investigate the mechanism of cellular proliferation of electromagnetic field (EMF) on human intervertebral disc (IVD) cells. MATERIALS AND METHODS: Human IVD cells were cultured three-dimensionally in alginate beads. EMF was exposed to IVD cells with 650 Ω, 1.8 millitesla magnetic flux density, 60 Hz sinusoidal wave. Cultures were divided into a control and EMF group. Cytotoxicity, DNA synthesis and proteoglycan synthesis were measured by MTT assay, [(3)H]-thymidine, and [(35)S]-sulfate incorporation. To detect phenotypical expression, reverse transcription-polymerase chain reactions (RT-PCR) were performed for aggrecan, collagen type I, and type II mRNA expression. To assess action mechanism of EMF, IVD cells were exposed to EMF with N(G)-Monomethyl-L-arginine (NMMA) and acetylsalicylic acid (ASA). RESULTS: There was no cytotoxicity in IVD cells with the EMF group in MTT assay. Cellular proliferation was observed in the EMF group (p < 0.05). There was no difference in newly synthesized proteoglycan normalized by DNA synthesis between the EMF group and the control. Cultures with EMF showed no significant change in the expression of aggrecan, type I, and type II collagen mRNA compared to the control group. Cultures with NMMA (blocker of nitric oxide) or ASA (blocker of prostaglandin E2) exposed to EMF demonstrated decreased DNA synthesis compared to control cultures without NMMA or ASA (p < 0.05). CONCLUSION: EMF stimulated DNA synthesis in human IVD cells while no significant effect on proteoglycan synthesis and chondrogenic phenotype expressions. DNA synthesis was partially mediated by nitric oxide and prostaglandin E2. EMF can be utilized to stimulate proliferation of IVD cells, which may provide efficient cell amplification in cell therapy to degenerative disc disease
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1. College of Medicine (의과대학) > Medical Research Center (임상의학연구센터) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kwon, Un Hye(권언혜)
Kim, Bo Ram(김보람)
Kim, Hyang(김향)
Kim, Ho Joong(김호중)
Moon, Seong Hwan(문성환)
Moon, Eun Su(문은수)
Park, Jin Oh(박진오)
Lee, Hwan Mo(이환모) ORCID logo https://orcid.org/0000-0002-5405-3832
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