Abstract:
BACKGROUND:Multiple cell-signaling ligands and receptors-including vascular endothelial growth factor (VEGF), insulin-like growth factor (IGF), endothelial growth factor (EGF), v-akt murine thymoma viral oncogene homolog (AKT), platelet-derived growth factor (PDGF), mitogen-activated protein kinase (MAPK), and 70-kilodalton (kD) protein S6 kinase (p70S6 kinase)-reportedly are variably expressed in osteogenic sarcoma. Expression of these proteins may have future implications for prognostication and targeted therapy. The objective of the current study was to determine the relation between clinical outcome and the expression of these proteins. METHODS:A paraffin-embedded microarray of 48 human osteogenic sarcoma tissue specimens was stained with the antibodies against VEGF, IGF, EGF, AKT, PDGF, MAPK, and p70S6 kinase. Staining for each protein included the total protein and, when applicable, the phosphorylated version of the protein. Immunohistochemical staining was then correlated with patient survival (overall survival [OS] and event-free survival [EFS]), histologic response to chemotherapy, and serum markers. RESULTS:There was a negative correlation between VEGF receptor 3 (VEGF-R3) and both OS and EFS. VEGF-B was correlated with a poor histologic response to chemotherapy. Serum markers were not correlated with any specific proteins. When using a P value of .05, multiple correlations were observed between proteins of various pathways. CONCLUSIONS:The current results suggested that the VEGF pathway is a critical signaling pathway in osteogenic sarcoma. These data have identified specific proteins within these pathways toward which future investigations should be directed to further clarify their prognostic potential.
journal_name
Cancerjournal_title
Cancerauthors
Abdeen A,Chou AJ,Healey JH,Khanna C,Osborne TS,Hewitt SM,Kim M,Wang D,Moody K,Gorlick Rdoi
10.1002/cncr.24562subject
Has Abstractpub_date
2009-11-15 00:00:00pages
5243-50issue
22eissn
0008-543Xissn
1097-0142journal_volume
115pub_type
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