Abstract:
:Giant cell tumor of bone is a progressive, potentially malignant process which destroys skeletal tissue by virtue of its osteoclast complement. As a biological entity it provides a unique natural model of bone resorption by osteoclasts whose recruitment and development is controlled by a neoplastic population of fibroblast-like cells. Understanding of the etiopathogenesis of this tumor could provide new insights into the mechanisms underlying osteoblast-osteoclast interactions in normal and diseased bone. Recent studies have shown that the stromal cell component in giant cell tumors is the only proliferating subpopulation of cells, and the giant cells themselves are nonproliferative and reactive. These stromal cells express several genes associated with the osteoblastic phenotype, synthesize, to a limited degree, certain matrix proteins associated with bone, and express several factors which are presumably involved in the recruitment of osteoclasts. In culture, giant cell tumor-associated stromal cells promote the fusion of monocytes and the proliferation of osteoblasts either by the secretion of factors or cell-cell contact. Hence, giant cell tumor of bone is a self-contained biosystem in which cells of both the stromal and hematopoietic lineages interact in a fashion similar to that observed in normal skeletal remodeling. The neoplastic nature of the stromal component, however, drives the hematopoietic precursors to undergo fusion, produces aggressive bone resorption, and results in extensive skeletal destruction. Examination of the various components of this system could lead to new directions for investigations aimed at a better understanding of osteoblast-osteoclast interactions.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Robinson D,Einhorn TAdoi
10.1002/jcb.240550305subject
Has Abstractpub_date
1994-07-01 00:00:00pages
300-3issue
3eissn
0730-2312issn
1097-4644journal_volume
55pub_type
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