title: Immunoexpression of transforming growth factor beta in desmoplastic ameloblastoma.
abstract: Desmoplastic ameloblastoma (DA) is an unusual subtype of ameloblastoma histologically characterized by the pronounced collagenized stroma. In the present study, the immunolocalization of transforming growth factor beta (TGF-beta), one of the most potent local factors for modulating extracellular matrix formation, was observed in DA in order to study its participation in the stromal desmoplasia. Seven cases of DA, including a "hybrid" lesion, were studied together with ten cases of ordinary follicular and plexiform ameloblastomas as the control. In contrast to ordinary ameloblastomas, marked immunoexpression was observed in all DAs but one. In the "hybrid" lesion, TGF-beta was not expressed in the area of follicular ameloblastoma but in that of DA. These results show that TGF-beta produced by tumor cells of DA plays a part in the desmoplastic matrix formation.
authors.affiliation: Department of Oral Pathology, Hiroshima University School of Dentistry, Japan. ttakata@ipc.hiroshima-u.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Takata
authors.forename: M
authors.initials: M
authors.lastname: Miyauchi
authors.forename: I
authors.initials: I
authors.lastname: Ogawa
authors.forename: Y
authors.initials: Y
authors.lastname: Kudo
authors.forename: T
authors.initials: T
authors.lastname: Takekoshi
authors.forename: M
authors.initials: M
authors.lastname: Zhao
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: H
authors.initials: H
authors.lastname: Nikai
authors.forename: K
authors.initials: K
authors.lastname: Komiyama
mesh_terms: D000293:Adolescent; D000328:Adult; D000564:Ameloblastoma / Q000378:metabolism* / Q000473:pathology; D003094:Collagen / Q000378:metabolism; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007573:Jaw Neoplasms / Q000378:metabolism* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D016212:Transforming Growth Factor beta / Q000378:metabolism*
chemical_list: D016212:Transforming Growth Factor beta; D003094:Collagen