Bone Cancer Research Today is a free monthly online journal that collates and summarizes the latest research about Bone Cancer, including details on symptoms, types, treatment.

Expression of hepatocyte growth factor and c-MET in skull base chordoma.

Naka T, Kuester D, Boltze C, Scheil-Bertram S, Samii A, Herold C, Ostertag H, Krueger S, Roessner A

Department of Pathology, Faculty of Medicine, Magdeburg University, Magdeburg, Germany. takahicom@hotmail.com

BACKGROUND: Hepatocyte growth factor (HGF) is a multipotent cytokine that is mediated by its receptor, c-MET. HGF/c-MET contributes to tumor progression in many human malignancies; however, HGF/c-MET is inversely correlated with aggressive biologic behavior in other cancers. Conversely, to the authors' knowledge, little is known regarding the significance of HGF/c-MET expression in skull base chordoma. METHODS: Using immunohistochemical techniques, the authors investigated HGF/c-MET expression in 46 primary and 25 recurrent lesions, and compared it with the expression of proteinases and cell differentiation markers, proliferative ability, and other clinicopathologic parameters. RESULTS: c-MET was found to be expressed in 70.0% of primary and 88.0% of recurrent lesions. HGF expression was scarcely detected. Higher c-MET expression was found to be correlated with younger patient age. Lesions with a higher expression of low molecular weight cytokeratin (CAM5.2) demonstrated significantly higher c-MET scores in both primary and recurrent lesions compared with those with lower CAM5.2 expression. In recurrent lesions, higher c-MET expression was found to be associated with the scores of matrix metalloproteinase (MMP)-1, MMP-2, tissue inhibitor of matrix metalloproteinase-1, and urokinase plasminogen activator (uPA); however, only uPA was found to be correlated with higher c-MET expression in primary lesions. c-MET expression did not appear to be correlated with MIB-1 labeling index. Patients with higher c-MET expression were found to have longer survival. CONCLUSIONS: In the current study, c-MET expression was a common event, and was found to be correlated with CAM5.2 expression, younger patient age, and a favorable prognosis in patients with skull base chordoma. However, HGF/c-MET paracrine signaling also may contribute to its invasive ability, especially in recurrent lesions.

Published 24 December 2007 in Cancer, 112(1): 104-10.
Full-text of this article is available online (may require subscription).

© 2004-2008 Bone Cancer Research Today. All Rights Reserved.