Interleukin-1α Activates an NF-κB-like Factor in Osteoclast-like Cells

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書誌事項

公開日
1996-03
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
  • http://creativecommons.org/licenses/by/4.0/
DOI
  • 10.1074/jbc.271.9.4605
公開者
Elsevier BV

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説明

We investigated the NF-kappaB transcription factor in osteoclast-like cells. Osteoclast-like cells were differentiated from mouse bone marrow cells in co-culture with mouse calvaria-derived primary osteoblasts in the presence of 1alpha,25-dihydroxyvitamin D3 and prostaglandin E2 in collagen gel-coated dishes. We enriched osteoclast-like cells from the co-cultures by Pronase treatment. When the enriched osteoclast-like cells were treated with phorbol 12-myristate 13-acetate, interleukin-1 (IL-1), calcitonin, or macrophage colony-stimulating factor, only IL-1 activated an NF-kappaB-like factor, which specifically bound to a kappaB motif DNA sequence, as detected by an electrophoretic mobility shift assay. IL-1 also activated NF-kappaB induction in osteoblasts. However, the NF-kappaB-like factor induced by IL-1-stimulated osteoclast-like cells is of smaller molecular size than the factor in osteoblasts, as shown by an electrophoretic mobility shift assay. The NF-kappaB activity of osteoclast-like cells was recognized completely by antibodies against the p50 subunit, and only partially by antibodies against the p65 subunit of NF-++kappaB. Antibodies against c-Rel, Rel B, and p52 did not recognize the NF-kappaB-like factor. These results suggest that IL-1 activates an NF-kappaB-like factor in osteoclast-like cells, which contains p50 and p65-related proteins.

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