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dc.contributor.authorUdagawa, N.-
dc.contributor.authorChan, J.-
dc.contributor.authorWada, S.-
dc.contributor.authorFindlay, D.-
dc.identifier.citationBone, 1996; 18(6):511-516-
dc.description.abstractWe previously reported that osteoclast formation in vitro, by coculture of mouse bone marrow and primary osteoblastic cells, occurs in two phases: proliferation of osteoclast progenitors followed by terminal differentiation into mature osteoclasts. Using this coculture system, we examined the effects of c-fos antisense and sense phosphorothioate oligonucleotides on osteoclast development and macrophage differentiation. Treatment with c-fos antisense for the first 4 days of coculture inhibited osteoclast formation in a dose-dependent fashion. However, when c-fos antisense was added during the second phase of coculture (4-6 days), osteoclast formation was unaffected. In contrast, c-fos antisense treatment had no effect on the appearance of F4/80 antigen-positive cells of the macrophage lineage in these cultures or on the induction by colony stimulating factor-1 of macrophage colony formation in cultures of mouse bone marrow cells in agar. Neither osteoclast differentiation nor macrophage appearance was inhibited by adding control c-fos sense in the cocultures. When c-fos antisense was added into an assay of bone resorption by mature osteoclasts, pit formation on dentine slices was unaffected. These results indicate that c-fos plays an important role in the proliferative phase of osteoclast progenitors in osteoclast development, but not in the terminal differentiation phase or in the bone resorbing activity of mature osteoclasts. c-fos antisense specifically inhibited osteoclast formation but had no effect on macrophage development.-
dc.publisherElsevier BV-
dc.rightsCopyright © 1996 Published by Elsevier Inc.-
dc.subjectBone resorption-
dc.subjectc-fos protooncogene-
dc.titlec-fos Antisense DNA Inhibits Proliferation of Osteoclast Progenitors in Osteoclast Developments but not Macrophage Differentiation In Vitro-
dc.typeJournal article-
Appears in Collections:Aurora harvest
Orthopaedics and Trauma publications

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