TY - JOUR
T1 - β-6 Integrin, tenascin-C, and MMP-1 expression in salivary gland neoplasms
AU - Westernoff, Trent H.
AU - Jordan, Richard C.K.
AU - Regezi, Joseph A.
AU - Ramos, Daniel M.
AU - Schmidt, Brian L.
N1 - Funding Information:
The authors are indebted to Nusi P. Dekker for performing the immunohistochemistry. This work was supported the following grants: NIH/NIDCR K23DE00443, NIH/NCI CA095231, NIH/NIDCR PO1DE13904; NIH/NIDCR DE14609, NIH/NIDCR ROI DEO11930, NIH/NIDCR ROI DE12856 Tobacco-related disease research program grants 11RT-0141 and 12KT-0166.
PY - 2005/2
Y1 - 2005/2
N2 - β-6 Integrin, tenascin-C, and MMP-1 (matrix metalloproteinase-1) are invasion-related proteins that are frequently overexpressed in many human malignancies. The objective of this study was to determine whether there is overexpression of these molecules in three types of salivary neoplasms showing markedly different behavior. A total of 55 formalin-fixed, paraffin-embedded archived specimens comprising 19 adenoid cystic carcinomas (ACC), 18 polymorphous low-grade adenocarcinomas (PLGA) and 18 pleomorphic adenomas (PA) were utilized in this study. A standard immunohistochemical technique was used to determine the expression levels of β-6 integrin, tenascin-C, and matrix metalloproteinase-1 (MMP-1) proteins. Sections were assessed semiquantitatively, and tumors were divided into two groups, low-expressors (0-1+) and high-expressors (2-3+) for statistical analysis. Staining was graded as 0 (<1% positive tumor cells), 1+ (<25% positive tumor cells), 2+ (25-50% positive tumor cells), and 3+ (>50% positive cells). The results showed that the malignant tumors were higher expressors of β-6 than the benign tumors. ACCs showed significantly higher expression of β-6 than PAs (p = 0.04). No significant difference was observed between ACCs and PLGAs. β-6 expression was rarely seen in normal salivary gland epithelium and was occasionally present in mucosa overlying the tumors. PAs were high-expressors of tenascin-C with a significant difference relative to ACCs (p = 0.03). A majority of tumors in all three tumor types showed high expression of MMP1 with expression significantly greater in the PAs compared to ACCs (p = 0.008). We conclude that ACCs and PLGAs express β-6, tenascin-C, and MMP-1, but that their expression patterns are not significantly different. β-6 appears to be more closely associated with the malignant tumors, and MMP-1 more closely associated with the benign tumors. We believe that β-6, tenascin-C, and MMP-1 proteins are part of the molecular repertoire used by salivary tumors for malignant invasion and benign tumor expansion.
AB - β-6 Integrin, tenascin-C, and MMP-1 (matrix metalloproteinase-1) are invasion-related proteins that are frequently overexpressed in many human malignancies. The objective of this study was to determine whether there is overexpression of these molecules in three types of salivary neoplasms showing markedly different behavior. A total of 55 formalin-fixed, paraffin-embedded archived specimens comprising 19 adenoid cystic carcinomas (ACC), 18 polymorphous low-grade adenocarcinomas (PLGA) and 18 pleomorphic adenomas (PA) were utilized in this study. A standard immunohistochemical technique was used to determine the expression levels of β-6 integrin, tenascin-C, and matrix metalloproteinase-1 (MMP-1) proteins. Sections were assessed semiquantitatively, and tumors were divided into two groups, low-expressors (0-1+) and high-expressors (2-3+) for statistical analysis. Staining was graded as 0 (<1% positive tumor cells), 1+ (<25% positive tumor cells), 2+ (25-50% positive tumor cells), and 3+ (>50% positive cells). The results showed that the malignant tumors were higher expressors of β-6 than the benign tumors. ACCs showed significantly higher expression of β-6 than PAs (p = 0.04). No significant difference was observed between ACCs and PLGAs. β-6 expression was rarely seen in normal salivary gland epithelium and was occasionally present in mucosa overlying the tumors. PAs were high-expressors of tenascin-C with a significant difference relative to ACCs (p = 0.03). A majority of tumors in all three tumor types showed high expression of MMP1 with expression significantly greater in the PAs compared to ACCs (p = 0.008). We conclude that ACCs and PLGAs express β-6, tenascin-C, and MMP-1, but that their expression patterns are not significantly different. β-6 appears to be more closely associated with the malignant tumors, and MMP-1 more closely associated with the benign tumors. We believe that β-6, tenascin-C, and MMP-1 proteins are part of the molecular repertoire used by salivary tumors for malignant invasion and benign tumor expansion.
KW - Adenoid cystic carcinoma
KW - MMP-1
KW - Pleomorphic adenoma
KW - Polymorphous low grade adenocarcinoma
KW - Salivary gland neoplasm
KW - Tenascin-C
KW - β-6 Integrin
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U2 - 10.1016/j.oraloncology.2004.08.002
DO - 10.1016/j.oraloncology.2004.08.002
M3 - Article
C2 - 15695119
AN - SCOPUS:13444271989
SN - 1368-8375
VL - 41
SP - 170
EP - 174
JO - Oral Oncology
JF - Oral Oncology
IS - 2
ER -