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Expression of connexin 43 mRNA in microisolated murine osteoclasts and regulation of bone resorption in vitro by gap junction inhibitors.
Umeå University, Faculty of Medicine, Odontology, Oral Cell Biology.
Umeå University, Faculty of Medicine, Odontology, Oral Cell Biology.
2003 (English)In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 18;303, no 4, 1179-1185 p.Article in journal (Refereed) Published
Abstract [en]

Several studies have demonstrated that connexin 43 (Cx43) mediates signals important for osteoblast function and osteogenesis. The role of gap junctional communication in bone resorption is less clear. We have investigated the expression of Cx43 mRNA in osteoclasts and bone resorption cultures and furthermore, the functional importance of gap junctional communication in bone resorption. RT-PCR analysis demonstrated Cx43 mRNA expression in mouse bone marrow cultures and in osteoclasts microisolated from the marrow cultures. Cx43 mRNA was also expressed in bone resorption cultures with osteoclasts and osteoblasts/stromal cells incubated for 48h on devitalized bone slices. An up-regulation of Cx43 mRNA was detected in parathyroid (PTH)-stimulated (0.1 nM) bone resorption. Two inhibitors of gap junction communication, 18alpha-glycyrrhetinic acid (30 microM) and oleamide (100 microM), significantly inhibited PTH- and 1,25-(OH)(2)D(3)-stimulated osteoclastic pit formation. In conclusion, our data indicate a functional role for gap junction communication in bone resorption.

Place, publisher, year, edition, pages
2003. Vol. 18;303, no 4, 1179-1185 p.
Identifiers
URN: urn:nbn:se:umu:diva-17341DOI: doi:10.1016/S0006-291X(03)00502-3PubMedID: 12684060OAI: oai:DiVA.org:umu-17341DiVA: diva2:157014
Available from: 2007-11-08 Created: 2007-11-08 Last updated: 2017-12-14Bibliographically approved

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