title: Expression of invasion markers CD44v6/v3, NM23 and MMP2 in laryngeal and hypopharyngeal carcinoma.
abstract: Twelve laryngeal squamous cell carcinoma cases (7 laryngeal and 5 hypopharyngeal cancer; 15 samples) were analysed by immunohistochemistry for the expression of invasion markers CD44v6/v3, NM23 and matrix metalloproteinase, MMP2. The laryngeal epithelium showed CD44v6+/v3+/NM23-/MMP2- phenotype. When tumors were grouped into TNM categories the phenotype of the T2 and T3 tumors was similar, characterised by decreased CD44v3+ and lack of MMP2 expressions. Meanwhile the NM23 expression was more frequent in T3 tumors. In T4 stage the frequency of NM23 and MMP2 positive cases increased (5/6 and 4/6, respectively) but there was no correlation with the appearence of lymph node metastasis. Comparison of the phenotype of laryngeal and hypopharyngeal tumors, irrespective of the TNM stages, revealed characteristic differences: T2 stage laryngeal tumors showed decreased CD44v3 and occasional NM23 and MMP2 positivity, while in T3 stage these tumors were characterised by increased frequency of NM23 positivity. The phenotype of the hypopharyngeal tumors was significantly different with a high frequency of MMP2 positive cases (5/6) and NM23+/low CD44v3+ phenotype. The sharp differences in the phenotypes of laryngeal and hypopharyngeal carcinomas were connected to the differences in their invasive capacity unlike to the size of the tumors, since the T4 stage hypopharyngeal tumors had a significantly smaller size than laryngeal ones, even at lower stages.
authors.affiliation: Semmelweis University of Medicine, Department of Oto-Rhino-Laryngology, Budapest, Hungary.
authors.forename: G
authors.initials: G
authors.lastname: Répássy
authors.forename: C
authors.initials: C
authors.lastname: Forster-Horváth
authors.forename: A
authors.initials: A
authors.lastname: Juhász
authors.forename: R
authors.initials: R
authors.lastname: Adány
authors.forename: A
authors.initials: A
authors.lastname: Tamássy
authors.forename: J
authors.initials: J
authors.lastname: Tímár
mesh_terms: D000951:Antigens, Neoplasm / Q000096:biosynthesis; D014408:Biomarkers, Tumor; D002277:Carcinoma / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D018093:Gelatinases / Q000096:biosynthesis*; D006023:Glycoproteins / Q000096:biosynthesis*; D006801:Humans; D018960:Hyaluronan Receptors / Q000096:biosynthesis*; D007012:Hypopharyngeal Neoplasms / Q000378:metabolism* / Q000473:pathology*; D007822:Laryngeal Neoplasms / Q000378:metabolism* / Q000473:pathology*; D008297:Male; D020778:Matrix Metalloproteinase 2; D008666:Metalloendopeptidases / Q000096:biosynthesis*; D020559:Monomeric GTP-Binding Proteins; D054778:NM23 Nucleoside Diphosphate Kinases; D009361:Neoplasm Invasiveness; D009701:Nucleoside-Diphosphate Kinase; D014157:Transcription Factors / Q000096:biosynthesis*
chemical_list: D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; C112697:CD44v6 antigen; D006023:Glycoproteins; D018960:Hyaluronan Receptors; D054778:NM23 Nucleoside Diphosphate Kinases; D014157:Transcription Factors; C517938:NME1 protein, human; D009701:Nucleoside-Diphosphate Kinase; D018093:Gelatinases; D008666:Metalloendopeptidases; D020778:Matrix Metalloproteinase 2; D020559:Monomeric GTP-Binding Proteins