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Osteoclastogenesis is enhanced by activated B cells but suppressed by activated CD8(+) T cells
Cited 147 time in
Web of Science
Cited 157 time in Scopus
- Authors
- Issue Date
- 2001-07
- Publisher
- John Wiley & Sons Ltd.
- Citation
- European Journal of Immunology, Vol.31 No.7, pp.2179-2188
- Abstract
- Host immune response is known to contribute to the progression of periodontitis, and alveolar bone destruction in periodontitis is associated with enhanced osteoclast activity. Therefore, we evaluated the roles of activated lymphocyte subsets in osteoclastogenesis. Osteoclast precursors were co-cultured with activated lymphocytes (B, CD4(+) T, CD8(+) T) in the presence of either macrophage colony-stimulating factor (M-CSF) alone or M-CSF plus soluble receptor activator of NF-kappaB ligand (sRANKL), and subsequent differentiation into active osteoclasts was evaluated by a resorption assay. The activated B and CD4(+) cells, but not CD8(+) T cells, induced osteoclast differentiation in the presence of M-CSF alone. In the presence of M-CSF and sRANKL, B cells induced the formation of small but highly active osteoclasts and increased resorption, while CD8(+) T cells profoundly suppressed osteoclastogenesis. Go-culture using an insert well or supernatant suggested that both B and CD8+ T cells acted on osteoclasts mostly via soluble proteins. Activated B cells expressed many osteo-clastogenic factors including RANKL, TNF-alpha, IL-6, MIP-1 alpha, and MCP-3. CD8(+) T cells expressed a substantial amount of osteoprotegerin (OPG) along with RANKL. However, blocking antibody to OPG did not reverse the suppression by CD8(+) T cells, suggesting that other factor(s) are involved. Taken together, activated B cells promoted osteoclastogenesis, while CD8(+) T cells inhibited the osteoclast formation via direct interaction. The results imply the importance of lymphocyte subpopulations in the development of periodontitis.
- ISSN
- 0014-2980
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