Abstract
Prostaglandin synthesis in the wall of radicular cysts was determined by immunohistochemistry and radiothinlayer chromatography. PGE2 is predominantly produced by plasma cells and histiocytic elements, whereas much less is synthesized by fibroblasts and endothelial cells as estimated using immunohistochemistry. 6-oxo-PGF1 alpha, however, was primarily found to be generated by endothelial cells and fibroblasts; only small amounts seem to be derived from histiocytic elements and plasma cells. The response of the cystic epithelium to anti-PGE2 and anti-6-oxo-PGF1 alpha antibodies was negative or showed only minimal staining. It can thus be concluded that the granulation tissue and its cellular components modulating the inflammatory process are the main source of prostaglandin synthesis in the wall of radicular cysts and may therefore be responsible for the resultant osteolytic activity.
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