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Medientyp: E-Artikel Titel: Parabiosis model does not show presence of circulating osteoprogenitor cells Beteiligte: Boban, Ivana; Barisic‐Dujmovic, Tatjana; Clark, Stephen H. Erschienen: Wiley, 2010 Erschienen in: genesis Sprache: Englisch DOI: 10.1002/dvg.20602 ISSN: 1526-968X; 1526-954X Schlagwörter: Cell Biology ; Endocrinology ; Genetics Entstehung: Anmerkungen: Beschreibung: <jats:title>Abstract</jats:title><jats:p>The goal of this study was to determine the presence of osteoprogenitor cells in the peripheral blood. Experiments were conducted with a parabiosis model in which osteoblast specific transgenic mice (Col2.3GFP or hOC‐GFP) were surgically joined with a transgenic mouse where herpes virus thymidine kinase gene is under the control of the collagen α1 promoter (Col2.3ΔTK). This method permits conditional ablation of osteoblasts by ganciclovir (GCV) treatment. In parabionts treated with GCV for 15 days or 1.5–2 months, GFP (hOC‐GFP or Col2.3GFP) expression was not detected in histological preparations or in marrow stromal cell cultures from the Col2.3ΔTK parabiont. Finally, Col2.3GFP/Col2.3ΔTK pairs were treated with GCV for 15 days and allowed to recover from GCV for 3 months. Again there was a failure to detect Col2.3GFP expressing cells in the Col2.3ΔTK parabiont. These observations, at least within the limits of this model system, allow the conclusion that osteoprogenitor cells do not readily circulate. genesis 48:171–182, 2010. © 2010 wiley‐Liss, Inc.</jats:p>