Parabiosis model does not show presence of circulating osteoprogenitor cells

Genesis : the Journal of Genetics and Development
Ivana BobanStephen H Clark

Abstract

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 alpha1 promoter (Col2.3DeltaTK). 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 Col2.3DeltaTK parabiont. Finally, Col2.3GFP/Col2.3DeltaTK 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 Col2.3DeltaTK parabiont. These observations, at least within the limits of this model system, allow the conclusion that osteoprogenitor cells do not readily circulate.

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Citations

Sep 7, 2012·Leukemia·H Bonig, T Papayannopoulou
May 4, 2011·Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research·Robert J Pignolo, Moustapha Kassem
Jul 1, 2017·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Ralph S MarcucioJoel D Boerckel
Aug 23, 2018·Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research·Joseph FeatherallDavid W Rowe
Oct 30, 2020·Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research·Jack FeehanGustavo Duque
May 1, 2021·Metabolites·Hongshuai LiJohnny Huard

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