title: Association of aberrant p53 and p21(WAF1) immunoreactivity with the outcome of oral verrucous leukoplakia in Taiwan.
abstract: The expression of p53 and p21WAF1 in 53 oral verrucous leukoplakias (OVLs), mostly non-dysplastic lesions, was investigated to ascertain the role of such events in malignant conversion. Immunohistochemical analysis revealed aberrant p53 and p21WAF1 immunoreactivity in 51% (27 cases) and 75% (40 cases), respectively. After an average follow-up period of three and a half years, histopathological examination revealed that 22 (42%) cases had developed oral squamous cell carcinoma (OSCC), 14 (26%) cases had undergone recurrence, and 17 (32%) cases were free of disease. The oncogenic potential of this subset of premalignant lesions warrants attention. A significant difference in the frequency of OSCC progression/recurrence was noted in lesions bearing aberrant immunoreactivity of either p53 (93% vs 42%; P=0.00008) or p21WAF1 (80% vs 32%; P=0.002) in comparison with lesions without immunoreactivity. This study suggested that the aberrant immunoreactivity of p53 and p21WAF1 may represent important alterations of OVL and could affect the outcome of this lesion.
authors.affiliation: The Faculty of Dentistry and Institute of Oral Biology, National Yang-Ming University, Taipei, Taiwan, ROC.
authors.forename: K W
authors.initials: KW
authors.lastname: Chang
authors.forename: S C
authors.initials: SC
authors.lastname: Lin
authors.forename: P C
authors.initials: PC
authors.lastname: Kwan
authors.forename: Y K
authors.initials: YK
authors.lastname: Wong
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000473:pathology; D002471:Cell Transformation, Neoplastic / Q000235:genetics / Q000473:pathology; D015331:Cohort Studies; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins / Q000235:genetics*; D004791:Enzyme Inhibitors / Q000378:metabolism*; D005500:Follow-Up Studies; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D007972:Leukoplakia, Oral / Q000235:genetics / Q000473:pathology*; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000235:genetics / Q000473:pathology; D009364:Neoplasm Recurrence, Local / Q000235:genetics / Q000473:pathology; D011230:Precancerous Conditions / Q000235:genetics / Q000473:pathology; D011379:Prognosis; D013624:Taiwan; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: C493956:CDKN1A protein, human; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins; D004791:Enzyme Inhibitors; D016159:Tumor Suppressor Protein p53