Expression of p53 protein in oral submucous fibrosis, oral epithelial hyperkeratosis) and oral epithelial dysplasia
Journal
Journal of the Formosan Medical Association
Journal Volume
99
Journal Issue
3
Pages
229-234
Date Issued
2000
Author(s)
Abstract
Background and purpose: In our previous study, positive p53 staining was observed in 47 of 81 (58%) cases of oral squamous cell carcinoma associated with areca quid (AQ) chewing and cigarette smoking. This study looked for expression of p53 protein in premalignant oral lesions in patients who chewed AQ or smoked cigarettes, or both. Methods: Expression of p53 protein was examined in histologic sections of oral submucous fibrosis (OSF, n = 50), epithelial hyperkeratosis (EH, n = 10), epithelial dysplasia (ED, n = 10), and normal oral mucosa (NOM, n = 10) with antibodies against p53 protein using an immunoperoxidase technique. Results: Positive p53 staining was observed in 30 (60%) OSF specimens, four (40%) EH specimens, seven (70%) ED specimens, and none of the NOM specimens. Only four (8%) of the OSF specimens and none of the EH specimens had more than 25% p53-positive keratinocytes. However, in four (40%) of the ED specimens, more than 50% of the keratinocytes were p53-positive. The degree of p53 staining increased with the morphologic transformation of normal-appearing epithelial cells into dysplastic epithelial cells. There was no significant correlation between expression of p53 in OSF epithelium and the clinicohistologic parameters of patients with OSF. Conclusions: These results demonstrate that p53 is often present in precancerous lesions of patients who chew AQ and smoke cigarettes. We suggest that p53 may play a role in dysplastic cell transformation in premalignant oral lesions.
Subjects
Areca quid chewing; Cigarette smoking; Oral precancer; Oral submucous fibrosis; p53
SDGs
Other Subjects
protein p53; adult; article; betel nut; cell transformation; cigarette smoking; dysplasia; female; histology; human; human tissue; hyperkeratosis; major clinical study; male; mouth disease; precancer; protein expression; skin disease; Adult; Aged; Areca; Female; Fibrosis; Humans; Male; Middle Aged; Mouth Mucosa; Mouth Neoplasms; Plants, Medicinal; Precancerous Conditions; Smoking; Tumor Suppressor Protein p53
Type
journal article