Changes in epidermal growth factor receptor gene copy number during oral carcinogenesis

Bates, Timothy, Kennedy, Matthew, Diajil, Ameena, Goodson, Michaela, Thomson, Peter, Doran, Emma, Farrimond, Heather, Thavaraj, Selvam, Sloan, Philip, Kist, Ralf, and Robinson, Max (2016) Changes in epidermal growth factor receptor gene copy number during oral carcinogenesis. Cancer Epidemiology, Biomarkers & Prevention, 25 (6). pp. 927-935.

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Background: Oral squamous cell carcinoma (OSCC) is a global healthcare problem associated with poor clinical outcomes. Early detection is key to improving patient survival. OSCC may be preceded by clinically recognizable lesions, termed oral potentially malignant disorders (OPMD). As histologic assessment of OPMD does not accurately predict their clinical behavior, biomarkers are required to detect cases at risk of malignant transformation. Epidermal growth factor receptor gene copy number (EGFR GCN) is a validated biomarker in lung non–small cell carcinoma. We examined EGFR GCN in OPMD and OSCC to determine its potential as a biomarker in oral carcinogenesis.

Methods: EGFR GCN was examined by in situ hybridization (ISH) in biopsies from 78 patients with OPMD and 92 patients with early-stage (stages I and II) OSCC. EGFR ISH signals were scored by two pathologists and a category assigned by consensus. The data were correlated with patient demographics and clinical outcomes.

Results: OPMD with abnormal EGFR GCN were more likely to undergo malignant transformation than diploid cases. EGFR genomic gain was detected in a quarter of early-stage OSCC, but did not correlate with clinical outcomes.

Conclusion: These data suggest that abnormal EGFR GCN has clinical utility as a biomarker for the detection of OPMD destined to undergo malignant transformation. Prospective studies are required to verify this finding. It remains to be determined if EGFR GCN could be used to select patients for EGFR-targeted therapies.

Item ID: 68456
Item Type: Article (Research - C1)
ISSN: 1538-7755
Copyright Information: © 2016 American Association for Cancer Research.
Date Deposited: 28 Jul 2022 02:20
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3203 Dentistry > 320305 Oral and maxillofacial surgery @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3211 Oncology and carcinogenesis > 321109 Predictive and prognostic markers @ 50%
SEO Codes: 20 HEALTH > 2001 Clinical health > 200101 Diagnosis of human diseases and conditions @ 50%
20 HEALTH > 2001 Clinical health > 200104 Prevention of human diseases and conditions @ 50%
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