Download Bone Circulation and Vascularization in Normal and by R. De Marneffe (auth.), A. Schoutens, J. Arlet, J. W. M. PDF

By R. De Marneffe (auth.), A. Schoutens, J. Arlet, J. W. M. Gardeniers, S. P. F. Hughes (eds.)

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Extra resources for Bone Circulation and Vascularization in Normal and Pathological Conditions

Sample text

Genetic Relation between Bone Endothelium and Osteoblasts Elucidation of the genealogy of bone cells has been a classic problem in bone biology_ Current opinion holds that two distinct cell lines supply osteoblast and osteoclast precursers, osteoblasts being derived from stromal cells, and osteoclasts from the monocyte-macrophage cell line. The obligatory intimate relationship between bone vessels and osteoblasts has raised the theory that bone endothelial cells or pericytes might be osteoblast precursors (Trueta, 1963).

Next, the sections were incubated with antibody for 60 minutes at room temperature. The monoclonal antibodies were in the form of cell culture supernatant and used as neat solutions. The sections were washed in TBS for 5 minutes, incubated with peroxidase conjugated anti-mouse antibody for 30 minutes at room temperature (1:100 dilution, Dako) and then rewashed before the substrate (diaminobenzidine - 1 mg/ml in TBS + 100 JllllO m13 % HzOZ> was added for 2-3 minutes. The sections were washed again before being counterstained in Mayer's haematoxylin.

Angiographic and histological examination followed. In 2 rabbits the other, excavated, side of the plates was applied. In these mock experiments, the plates were elevated above and did not obstruct, the bone surface. They were still held in place by 4 nylon ties. The bones were examined 6 weeks postoperatively. At 4 weeks post-operatively, a marked hypervascularity affected the inner two thirds of cortex beneath the plates. Subsequently, erosion cavities were much in evidence. Severe bone removal from the periosteal aspect was also encountered, resulting in thinning of the plated cortex, sometimes in association with endosteal buttressing deep to the plate.

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