title: Lack of TGF-alpha and TGF-beta 1 synthesis by human eosinophils in chronic oral ulcers.
abstract: We recently demonstrated that eosinophils infiltrate prominently into cutaneous wounds in the Syrian hamster and represent a source of transforming growth factor-alpha and transforming growth factor-beta. In this study, we assessed the role of the eosinophil and eosinophil-derived transforming growth factors in human oral ulcers that exhibit delayed healing, descriptively termed traumatic ulcerative granuloma with stromal eosinophilia. Our aim was to determine whether eosinophils, which characteristically infiltrate traumatic ulcerative granuloma with stromal eosinophilia lesions, produced transforming growth factor-alpha or transforming growth factor-beta. Twelve cases of traumatic ulcerative granuloma with stromal eosinophilia were examined for transforming growth factor-alpha and transforming growth factor-beta mRNA and cellular protein by in situ hybridization and immunohistochemistry. Eosinophils in 92% of the cases did not express detectable cellular levels of mRNA for either of the transforming growth factors. In addition, only a small percentage of the many eosinophils infiltrating these lesions produced transforming growth factor-alpha or transforming growth factor-beta. The lack of significant synthesis of transforming growth factors by eosinophils in most of the cases of traumatic ulcerative granuloma with stromal eosinophilia is in striking contrast to the expression of transforming growth factors by the eosinophils that infiltrate the animal wound-healing model. Our findings may help to explain the delayed healing that is typical of TUGSE lesions.
authors.affiliation: Department of Oral Medicine and Diagnostic Sciences, Harvard School of Dental Medicine, Boston, Mass, USA.
authors.forename: A E
authors.initials: AE
authors.lastname: Elovic
authors.forename: G T
authors.initials: GT
authors.lastname: Gallagher
authors.forename: S
authors.initials: S
authors.lastname: Kabani
authors.forename: S J
authors.initials: SJ
authors.lastname: Galli
authors.forename: P F
authors.initials: PF
authors.lastname: Weller
authors.forename: D T
authors.initials: DT
authors.lastname: Wong
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D002908:Chronic Disease; D006224:Cricetinae; D004804:Eosinophils / Q000276:immunology / Q000378:metabolism*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D019226:Oral Ulcer / Q000276:immunology / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D012333:RNA, Messenger / Q000032:analysis; D016211:Transforming Growth Factor alpha / Q000096:biosynthesis*; D016212:Transforming Growth Factor beta / Q000096:biosynthesis*; D014945:Wound Healing / Q000502:physiology*
chemical_list: D012333:RNA, Messenger; D016211:Transforming Growth Factor alpha; D016212:Transforming Growth Factor beta