Immunohistochemical localization of fibroblast growth factors FGF-1 and FGF-2, and receptors FGFR2 and FGFR3 in the epithelium of human odontogenic cysts and tumors.
Acidic (FGF-1) and basic (FGF-2) fibroblast growth factors are members of a family of growth factors that function in growth, differentiation and regeneration of a variety of tissues. Their presence in human odontogenic cysts and tumors has not been previously investigated. This study was designed to detect immunohistochemically the presence of these factors and two fibroblast growth factor receptors (FGFR2 and FGFR3) in a cross section of odontogenic cysts and tumors, to determine if they may be involved in the differentiation of odontogenic epithelium or, more specifically, in the development of particular cysts or tumors. Archival formalin-fixed paraffin-embedded tissues were used. With some exceptions, FGF-2 and the receptor FGFR2, were found in the cytoplasm and occasionally in the nuclei of cells of odontogenic epithelium, while FGF-1 and the receptor FGFR3, were absent or only focally or weakly detected, using standard immunohistochemical techniques. The data are similar to those published for normal murine odontogenesis, suggesting that these factors are associated with odontogenic differentiation rather than pathogenesis. The presence of significant nuclear staining in odontogenic epithelium associated with embryonic mesenchyme in ameloblastic fibromas and ameloblastic fibro-odontomas suggests that FGF-2 may be involved in directing nuclear activity at the histodifferentiation stage of odontogenesis.
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School of Dentistry, Faculty of Medicine and Dentistry, University of Western Ontario, London, Canada.
Daley
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TD
Jackson
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Wysocki
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D000906:Antibodies; D015153:Blotting, Western; D002454:Cell Differentiation / Q000502:physiology; D002467:Cell Nucleus / Q000473:pathology; D004396:Coloring Agents; D003593:Cytoplasm / Q000648:ultrastructure; D003803:Dentigerous Cyst / Q000473:pathology; D004847:Epithelial Cells / Q000473:pathology; D004848:Epithelium / Q000473:pathology; D016220:Fibroblast Growth Factor 1; D016222:Fibroblast Growth Factor 2 / Q000032:analysis*; D005346:Fibroblast Growth Factors / Q000032:analysis*; D005882:Gingival Diseases / Q000473:pathology; D006801:Humans; D007074:Immunoglobulin G; D007150:Immunohistochemistry; D008648:Mesoderm / Q000473:pathology; D009805:Odontogenesis / Q000502:physiology; D009807:Odontogenic Cysts / Q000473:pathology*; D009808:Odontogenic Tumors / Q000473:pathology*; D009810:Odontoma / Q000473:pathology; D010509:Periodontal Cyst / Q000473:pathology; D011505:Protein-Tyrosine Kinases; D011842:Radicular Cyst / Q000473:pathology; D020794:Receptor Protein-Tyrosine Kinases / Q000032:analysis*; D051497:Receptor, Fibroblast Growth Factor, Type 2; D051498:Receptor, Fibroblast Growth Factor, Type 3; D017468:Receptors, Fibroblast Growth Factor / Q000032:analysis*
D000906:Antibodies; D004396:Coloring Agents; D007074:Immunoglobulin G; D017468:Receptors, Fibroblast Growth Factor; D016222:Fibroblast Growth Factor 2; D016220:Fibroblast Growth Factor 1; D005346:Fibroblast Growth Factors; C496353:FGFR2 protein, human; C496365:FGFR3 protein, human; D011505:Protein-Tyrosine Kinases; D020794:Receptor Protein-Tyrosine Kinases; D051497:Receptor, Fibroblast Growth Factor, Type 2; D051498:Receptor, Fibroblast Growth Factor, Type 3