This work describes the different patterns of expression of integrins and extracellular matrix proteins in normal and transformed mucosa in laryngeal and oropharyngeal carcinomas. Samples from each tumor group were sectioned and examined by immunohistochemistry using monoclonal antibodies raised against integrin chains (alpha2, alpha3, alpha6, beta1 and beta4) and their ligands (laminins 1 and 5, collagen type IV and two fibronectin isoforms: ED-A and ED-B). Controls were provided by samples of tumor-free laryngeal and oropharyngeal mucosa that had been removed during the surgical procedure. We found that the known distinct topographical pattern of integrins and the continuity of basement membrane components was altered in both groups but that the extent of changes was significantly more marked in oropharyngeal tumors, which are known to be more infiltrating and diffusive and to have a bad prognosis. These molecular patterns of expression can be used as an additional prognostic factor as they suggest a greater biological tumor aggressiveness of oropharyngeal tumors. We suggest that performing immunohistochemical analysis on biopsy samples may help in selecting the correct therapeutic strategy for these tumors and enable more accurate follow-up. The above-mentioned molecules may become part of the diagnostic toolbox of head and neck surgical pathologists

Differential expression and topography of adhesion molecules in laryngeal and oropharyngeal carcinomas.

STAFFIERI, ALBERTO;
2002

Abstract

This work describes the different patterns of expression of integrins and extracellular matrix proteins in normal and transformed mucosa in laryngeal and oropharyngeal carcinomas. Samples from each tumor group were sectioned and examined by immunohistochemistry using monoclonal antibodies raised against integrin chains (alpha2, alpha3, alpha6, beta1 and beta4) and their ligands (laminins 1 and 5, collagen type IV and two fibronectin isoforms: ED-A and ED-B). Controls were provided by samples of tumor-free laryngeal and oropharyngeal mucosa that had been removed during the surgical procedure. We found that the known distinct topographical pattern of integrins and the continuity of basement membrane components was altered in both groups but that the extent of changes was significantly more marked in oropharyngeal tumors, which are known to be more infiltrating and diffusive and to have a bad prognosis. These molecular patterns of expression can be used as an additional prognostic factor as they suggest a greater biological tumor aggressiveness of oropharyngeal tumors. We suggest that performing immunohistochemical analysis on biopsy samples may help in selecting the correct therapeutic strategy for these tumors and enable more accurate follow-up. The above-mentioned molecules may become part of the diagnostic toolbox of head and neck surgical pathologists
2002
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2460541
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact