title: Human papillomavirus and Epstein-Barr virus infection, p53 expression, and cellular proliferation in laryngeal carcinoma.
abstract: Laryngeal carcinomas are aggressive neoplasms with controversial association with the human papillomavirus (HPV) and Epstein-Barr virus (EBV). So far, the impairment of p53 protein function and its impact on cellular proliferation has not been studied adequately in these tumors. In this work, molecular biologic techniques were used to assess the frequency of HPV and EBV in 110 squamous cell carcinomas of the larynx. In addition, accumulation of p53 and Ki-67 cell proliferation antigen expression in malignant cells was assessed by immunohistochemical analysis. High-grade HPV was found in 37.3% of cases, and none had demonstrable EBV infection. Accumulation of p53 was found in 78.2% of the cases, and it was related to a high Ki-67 labeling index and higher histologic grade. The results demonstrate association of HPV with more than one third of laryngeal carcinomas studied, mainly glottic tumors. Tumors with increased cell proliferation were more frequently high grade, with p53 accumulation and lymph node metastasis.
authors.affiliation: Department of Pathology, Botucatu School of Medicine at Sao Paulo State University, Sao Paulo, Brazil.
authors.forename: Deilson Elgui
authors.initials: DE
authors.lastname: de Oliveira
authors.forename: Maura M
authors.initials: MM
authors.lastname: Bacchi
authors.forename: Ricardo S S
authors.initials: RS
authors.lastname: Macarenco
authors.forename: José Vicente
authors.initials: JV
authors.lastname: Tagliarini
authors.forename: Ricardo C
authors.initials: RC
authors.lastname: Cordeiro
authors.forename: Carlos E
authors.initials: CE
authors.lastname: Bacchi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000378:metabolism / Q000556:secondary* / Q000821:virology; D049109:Cell Proliferation; D004273:DNA, Neoplasm / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis; D020031:Epstein-Barr Virus Infections / Q000150:complications / Q000378:metabolism / Q000473:pathology*; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000302:isolation & purification*; D006801:Humans; D007124:Immunoenzyme Techniques; D019394:Ki-67 Antigen / Q000378:metabolism; D007822:Laryngeal Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000821:virology; D007830:Larynx / Q000378:metabolism / Q000473:pathology; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D027383:Papillomaviridae / Q000235:genetics / Q000302:isolation & purification*; D030361:Papillomavirus Infections / Q000150:complications / Q000378:metabolism / Q000473:pathology*; D012189:Retrospective Studies; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D004273:DNA, Neoplasm; D004279:DNA, Viral; D019394:Ki-67 Antigen; D016159:Tumor Suppressor Protein p53