Activation of Transcription Factor NF-kappaB and c-Jun/AP-1 by Various Compositions of Particles in Osteoclast Precursor Cells
Journal of the Korean Hip Society
; : 209-214, 2008.
Article
em Ko
| WPRIM
| ID: wpr-727103
Biblioteca responsável:
WPRO
ABSTRACT
PURPOSE: This study was performed in order to investigate the effects of various particle preparations on NF-kappaB and c-Jun/AP-1 activity in osteoclast precursor cells. MATERIALS AND METHODS: Osteoclast precursor cells isolated from C57BL mice were treated with PMMA (polymethylmethacrylate) spheres, polystyrene, titanium particles, and retrieved metal particles from failed cementless total hip replacements. NF-kappaB and c-Jun/AP-1 DNA binding activities were analyzed using electrophoretic mobility shift assays (EMSA). RESULTS: Commercially available PMMA and polystyrene spheres routinely showed negativity on endotoxin assays, but titanium particles and retrieved metal particles consistently showed positivity. PMMA spheres, with a maximal response noted at 30 minutes with an optimal concentration of 0.6 mg/ml, were potent stimulator of NF-kappaB and c-Jun/AP-1 activity in osteoclast precursor cells. Other particles (polystyrene, titanium, metal retrievals) also activated transcription factor NF-kappaB and c-Jun/AP-1 compared to controls. Endotoxin removal from retrieved metal particles diminished the biologic effect by approximately 40%. CONCLUSION: Particles of various compositions and sizes (PMMA, polystyrene, titanium, and retrieved metal particles) activated the NF-kappaB and c-Jun/AP-1 signaling pathways. This suggests that NF-kappaB and c-Jun/AP-1 may have important roles in the pathogenesis of periprosthetic osteolysis.
Palavras-chave
Texto completo:
1
Índice:
WPRIM
Assunto principal:
Osteoclastos
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Osteólise
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Poliestirenos
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Titânio
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Fatores de Transcrição
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DNA
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NF-kappa B
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Polimetil Metacrilato
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Artroplastia de Quadril
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Ensaio de Desvio de Mobilidade Eletroforética
Limite:
Animals
Idioma:
Ko
Revista:
Journal of the Korean Hip Society
Ano de publicação:
2008
Tipo de documento:
Article