title: p63 and E-cadherin Expression in Canine Oral Squamous Cell Carcinoma.
abstract: The expression of p63 and E-cadherin was studied in 22 oral squamous cell carcinomas in the dog according to immunohistochemical techniques. The association between these markers and clinicopathologic parameters was assessed. All tumor cells studied showed enhanced p63 expression. Regarding E-cadherin expression, 17 of 22 cases (77.3%) showed decreased immunoreactivity, and in 13 of 22 cases (59.1%), its expression was cytoplasmic. Neither p63 nor E-cadherin expression patterns were associated with tumor size, bone invasion, or lymph node metastasis. p63 score was related to proliferating cell nuclear antigen proliferative index (P = .020). A statistically significant correlation between the expression patterns of these 2 markers was noted (P = .026). Furthermore, they were related with tumor grade. An atypical p63 labeling and a cytoplasmic E-cadherin staining were statistically related with a higher tumor grade (P = .022 and P = .017, respectively). These findings suggest that changes in p63 and E-cadherin expression are frequent events in oral squamous cell carcinoma in dogs.
authors.affiliation: CIISA, Faculty of Veterinary Medicine, ULisboa; Avenida da Universidade Técnica 1300-477, Lisboa, Portugal lmestrinho@fmv.ulisboa.pt.
authors.forename: L A
authors.initials: LA
authors.lastname: Mestrinho
authors.affiliation: CIISA, Faculty of Veterinary Medicine, ULisboa; Avenida da Universidade Técnica 1300-477, Lisboa, Portugal.
authors.forename: H
authors.initials: H
authors.lastname: Pissarra
authors.affiliation: Research Centre for Biosciences and Health Technologies, Campo Grande, Lisboa, Portugal Faculty of Veterinary Medicine, Lusófona University of Humanities and Technologies, Campo Grande, Lisboa, Portugal.
authors.forename: P B
authors.initials: PB
authors.lastname: Faísca
authors.affiliation: Faculty of Veterinary Medicine, Lusófona University of Humanities and Technologies, Campo Grande, Lisboa, Portugal.
authors.forename: M
authors.initials: M
authors.lastname: Bragança
authors.affiliation: CIISA, Faculty of Veterinary Medicine, ULisboa; Avenida da Universidade Técnica 1300-477, Lisboa, Portugal.
authors.forename: M C
authors.initials: MC
authors.lastname: Peleteiro
authors.affiliation: CIISA, Faculty of Veterinary Medicine, ULisboa; Avenida da Universidade Técnica 1300-477, Lisboa, Portugal.
authors.forename: M M R E
authors.initials: MM
authors.lastname: Niza
mesh_terms: D000818:Animals; D014408:Biomarkers, Tumor / Q000378:metabolism*; D015820:Cadherins / Q000378:metabolism; D002294:Carcinoma, Squamous Cell / Q000378:metabolism / Q000473:pathology*; D003593:Cytoplasm / Q000378:metabolism; D004285:Dogs; D005260:Female; D007150:Immunohistochemistry / Q000662:veterinary; D008207:Lymphatic Metastasis; D008297:Male; D009062:Mouth Neoplasms / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*; D025521:Tumor Suppressor Proteins / Q000378:metabolism
chemical_list: D014408:Biomarkers, Tumor; D015820:Cadherins; D025521:Tumor Suppressor Proteins
keywords: E-cadherin; dog; oral squamous cell carcinoma; p63