PMID- 16996205 OWN - NLM STAT- MEDLINE DCOM- 20070516 LR - 20101118 IS - 0304-3835 (Print) IS - 0304-3835 (Linking) VI - 248 IP - 2 DP - 2007 Apr 18 TI - Insulin-like growth factor-1 receptor and ligand targeting in head and neck squamous cell carcinoma. PG - 269-79 AB - IGF-1 receptor (IGF-1R) signaling is associated with increased tumorigenesis of epithelial cancers. In light of recent epidemiological studies correlating high circulating levels of IGF-1 with increased risk of second primary tumors (SPTs) of the head and neck, we examined IGF system and epidermal growth factor receptor (EGFR) expression in human head and neck squamous cell carcinoma (HNSCC) matched pairs and a cross-section of HNSCC cell lines. Employing the latter, we demonstrated that IGF-1 stimulated S-phase transition in a PI 3-K/Akt and Erk-dependent manner in 5 of 8 cell lines, with Erk activation being dependent upon EGFR kinase activity. IGF-1 stimulated thymidine incorporation was inhibited by treatment with IGFBP-3, the IGF-1R tyrosine kinase inhibitor NVP-AEW541, or the EGFR tyrosine kinase inhibitor AG1478. Combining IGFBP-3 with NVP-AEW541 or AG1478 abrogated IGF-1 responses at 10-fold lower doses than either compound alone. These results demonstrate the potential for co-targeting the IGF system and EGFR in HNSCC. FAU - Slomiany, Mark G AU - Slomiany MG AD - Department of Cell and Molecular Pharmacology and Experimental Therapeutics and Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA. FAU - Black, Leigh Ann AU - Black LA FAU - Kibbey, Megan M AU - Kibbey MM FAU - Tingler, Melissa A AU - Tingler MA FAU - Day, Terry A AU - Day TA FAU - Rosenzweig, Steven A AU - Rosenzweig SA LA - eng PT - Journal Article DEP - 20060922 PL - Ireland TA - Cancer Lett JT - Cancer letters JID - 7600053 RN - 0 (Insulin-Like Growth Factor Binding Proteins) RN - 0 (Ligands) RN - 0 (Protein Kinase Inhibitors) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.10.1 (Receptor, IGF Type 1) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) SB - IM MH - Carcinoma, Squamous Cell/*metabolism MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Enzyme-Linked Immunosorbent Assay MH - Head and Neck Neoplasms/*metabolism MH - Humans MH - Immunoblotting MH - Insulin-Like Growth Factor Binding Proteins/*metabolism MH - Ligands MH - Phosphatidylinositol 3-Kinases/drug effects/metabolism MH - Protein Kinase Inhibitors/pharmacology MH - Proto-Oncogene Proteins c-akt/drug effects/metabolism MH - Receptor, IGF Type 1/*metabolism EDAT- 2006/09/26 09:00 MHDA- 2007/05/17 09:00 CRDT- 2006/09/26 09:00 PHST- 2006/05/30 00:00 [received] PHST- 2006/07/31 00:00 [revised] PHST- 2006/08/02 00:00 [accepted] PHST- 2006/09/26 09:00 [pubmed] PHST- 2007/05/17 09:00 [medline] PHST- 2006/09/26 09:00 [entrez] AID - S0304-3835(06)00497-6 [pii] AID - 10.1016/j.canlet.2006.08.004 [doi] PST - ppublish SO - Cancer Lett. 2007 Apr 18;248(2):269-79. doi: 10.1016/j.canlet.2006.08.004. Epub 2006 Sep 22.