PMID- 22825335 OWN - NLM STAT- MEDLINE DCOM- 20130411 LR - 20211021 IS - 1555-8576 (Electronic) IS - 1538-4047 (Print) IS - 1538-4047 (Linking) VI - 13 IP - 11 DP - 2012 Sep TI - pEGFR-Tyr 845 expression as prognostic factors in oral squamous cell carcinoma: a tissue-microarray study with clinic-pathological correlations. PG - 967-77 LID - 10.4161/cbt.20991 [doi] AB - The EGFR (epidermal growth factor receptor) a member of the family of transmembrane protein kinase receptors known as the erbB family shows a significant correlation with the presence of metastases and poorly differentiated oral cancer. Aim of the present work is to define the key-role of EGFR in oral cancer prognosis. We have analyzed the EGFR expression on 149 cases of oral squamous cell cancers (OSCC) and we have found that it was poorly expressed in normal oral epithelium, but its expression was significantly increased in OSCCs. Moreover, we have recorded that both pEGFR-Tyr 845 and pEGFR-Tyr 1068 were mainly distributed in high histological grading and in advanced stages. Western blotting has confirmed the total absence of EGFR phosphorylation in normal oral epithelium and the higher level of protein phosphorylation in representative cases of OSCCs. The EGF-R amplification was found by fluorescence in situ hybridization (FISH) in 14% of OSCC; interestingly, EGF-R amplification was mainly observed in OSCC with higher histological grading (G2 and G3) and advanced stage (pT4) sub-groups. Kaplan-Meyer survival analysis suggested that patients with positive pEGFR-Tyr 845 tumors had a worse prognosis and were bad responders to chemotherapy. These results confirm the central role of EGF-R activation status as a prognostic biomarker in OSCC. FAU - Aquino, Gabriella AU - Aquino G AD - Section of Pathological Anatomy, Fourth Section of Maxillofacial Surgery, Istituto Nazionale per lo Studio e la Cura dei Tumori, Fondazione G.Pascale, Naples, Italy. FAU - Pannone, Giuseppe AU - Pannone G FAU - Santoro, Angela AU - Santoro A FAU - Liguori, Giuseppina AU - Liguori G FAU - Franco, Renato AU - Franco R FAU - Serpico, Rosario AU - Serpico R FAU - Florio, Gianluca AU - Florio G FAU - De Rosa, Alfredo AU - De Rosa A FAU - Mattoni, Marilena AU - Mattoni M FAU - Cozza, Valentina AU - Cozza V FAU - Botti, Gerardo AU - Botti G FAU - Losito, Simona AU - Losito S FAU - Longo, Francesco AU - Longo F FAU - Staibano, Stefania AU - Staibano S FAU - Cuda, Giovanni AU - Cuda G FAU - Lo Muzio, Lorenzo AU - Lo Muzio L FAU - Sbordone, Carolina AU - Sbordone C FAU - Bufo, Pantaleo AU - Bufo P FAU - Grimaldi, Anna AU - Grimaldi A FAU - Caraglia, Michele AU - Caraglia M FAU - Di Domenico, Marina AU - Di Domenico M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120724 PL - United States TA - Cancer Biol Ther JT - Cancer biology & therapy JID - 101137842 RN - 42HK56048U (Tyrosine) RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Carcinoma, Squamous Cell/*enzymology/genetics/pathology MH - ErbB Receptors/*biosynthesis/genetics/metabolism MH - Female MH - Humans MH - Immunohistochemistry MH - Male MH - Middle Aged MH - Mouth Neoplasms/*enzymology/genetics/pathology MH - Neoplasm Staging MH - Paraffin Embedding MH - Phosphorylation MH - Prognosis MH - Retrospective Studies MH - Tissue Array Analysis MH - Tyrosine/genetics/metabolism PMC - PMC3461819 EDAT- 2012/07/25 06:00 MHDA- 2013/04/12 06:00 PMCR- 2013/09/01 CRDT- 2012/07/25 06:00 PHST- 2012/07/25 06:00 [entrez] PHST- 2012/07/25 06:00 [pubmed] PHST- 2013/04/12 06:00 [medline] PHST- 2013/09/01 00:00 [pmc-release] AID - 20991 [pii] AID - 2012CBT5600R [pii] AID - 10.4161/cbt.20991 [doi] PST - ppublish SO - Cancer Biol Ther. 2012 Sep;13(11):967-77. doi: 10.4161/cbt.20991. Epub 2012 Jul 24.