Premium
Pulsed electromagnetic fields stimulation affects osteoclast formation by modulation of osteoprotegerin, RANK ligand and macrophage colony‐stimulating facto
Author(s) -
Chang Kyle,
Chang Walter HongShong,
Huang Sherry,
Huang Smile,
Shih Chung
Publication year - 2005
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1016/j.orthres.2005.03.012.1100230611
Subject(s) - rankl , osteoclast , osteoprotegerin , bone resorption , macrophage colony stimulating factor , resorption , chemistry , stimulation , bone marrow , endocrinology , medicine , acid phosphatase , tartrate resistant acid phosphatase , macrophage , receptor , activator (genetics) , in vitro , biochemistry , enzyme
Electromagnetic stimulation has been documented to treat recalcitrant problems of musculoskeletal system. Yet, the underlying mechanisms are not completely understood. In this study, we investigated effect of pulsed electromagnetic fields (PEMF) with parameters modified from clinical bone growth stimulator on osteoclast formation, bone resorption, and cytokines associated with osteoclastogenesis. Marrow cells were harvested from both femora and tibiae of 6 week‐old mice and cultured in 8‐well chamber slides or 16‐well calcium phosphate apatite‐coated multitest slides. After 1‐day incubation, marrow cells were exposed to PEMF at different electric field intensities for 2 h/day and continued for 9 days. Osteoprotegerin (OPG), receptor activator of NF k B‐ligand (RANKL) and macrophage colony‐stimulating factor (M‐CSF) concentrations of each group were determined after PEMF stimulation. Osteoclast identity was confirmed by both tartrate resistant acid phosphatase (TRAP) stain and bone resorption assay. A statistically significant increase and decrease of osteoclastogenesis and bone resorption areas were found when exposed to PEMF with different intensities. Besides, consistent correlations among OPG, RANKL, M‐CSF, osteoclast numbers, and bone resorption after exposure to different intensities of PEMF were observed. These data demonstrated that PEMF with different intensities could regulate osteoclastogenesis, bone resorption, OPG, RANKL, and M‐CSF concentrations in marrow culture system. © 2005 Orthopaedic Research Society. Published by Elsevier Ltd. All rights reserved.