title: Expression of p53 protein in oral squamous cell carcinomas and adjacent non-tumorous mucosa of the floor of the mouth: an archival immunohistochemical study using wet autoclave pretreatment for antigen retrieval.
abstract: Routinely formalin-fixed and paraffin-embedded material of 22 squamous cell carcinomas of the floor of the mouth (T2NoMo, Ro), together with adjacent dysplastic or normal mucosa, were immunohistochemically investigated using a panel of four anti-p53 antibodies (CM1, PAb1801, DO7, PAb240) subsequent to wet autoclave pretreatment for antigen retrieval. p53 immunoreactivity was detected in 9/22 (40%) carcinomas with PAb1801 and DO7 antibodies, and in 8/22 cases using CM1 and PAb 240. p53-positive tumour cells accumulated predominantly at the invasive front of the carcinomas. A focal or scattered p53 immunoreactivity was observed in the adjacent normal and/or dysplastic mucosa in 17/22 (77%) cases using both CM1 and PAb1801 antibodies, in 10/22 with DO7, and in 8/22 with PAb240. This study has demonstrated examples of different p53 immunophenotypes in the non-tumorous and neoplastic oral mucosa of the same patient without significant correlation to the clinicopathological parameters studied.
mesh_terms: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D005260:Female; D005404:Fixatives; D005500:Follow-Up Studies; D005557:Formaldehyde; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D016130:Immunophenotyping; D008297:Male; D008875:Middle Aged; D009060:Mouth Floor / Q000378:metabolism / Q000473:pathology; D009061:Mouth Mucosa / Q000378:metabolism* / Q000473:pathology; D009062:Mouth Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D016612:Paraffin Embedding; D013194:Staining and Labeling; D013242:Sterilization / Q000379:methods; D016159:Tumor Suppressor Protein p53 / Q000235:genetics* / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D005404:Fixatives; D016159:Tumor Suppressor Protein p53; D005557:Formaldehyde