Prognostic value of epidermal growth factor receptor gene amplification in surgically resected non-adenocarcinoma lung cancer patients.

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e18553-e18553
Author(s):  
Yaewon Yang ◽  
Hyun Chang ◽  
Jong-Seok Lee ◽  
YuJung Kim ◽  
Sang-hoon Jheon ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Overall Survival ◽  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Copy Number ◽  
Gene Copy Number ◽  
Growth Factor Receptor ◽  
Gene Copy ◽  
Egfr Gene ◽  
Epidermal Growth

e18553 Background: The purpose of this study is to investigate the prognostic role of genomoic gain and expression for epidermal growth factor receptor (EGFR) gene in surgically resected non-adenocarcinoma of non-small-cell lung cancer (NA-NSCLC). Methods: This retrospective study included 115 NA-NSCLC consecutive patients with available tumor tissue and survival data, median follow up period of 6.4 years. EGFR gene copy number and protein expression was evaluated using by fluorescent in situ hybridization (FISH) and immunohistochemistry (IHC) in tissue microarray sections, respectively. Results: Among 115 patients, 99 patients (86.1 %) were with squamous cell carcinoma histology. EGFR gene amplification and high polysomy (EGFR FISH+) were observed in 57 (49.6%) and 45 (39.1%) patients, respectively. Patients with EGFR FISH+ had significantly shorter overall survival [median, 41 months vs. not reached (>70 months), P = 0.011]. Multivariable model confirmed that patients with EGFR FISH+ had a significantly greater risk of death than those with EGFR FISH-negative after adjusting pathologic staging, presence of pleural invasion, venous invasion and adjuvant chemotherapy (hazard ratio = 2.11, 95% confidence interval 1.23-3.61, P = 0.006). EGFR IHC expression did not associate with overall survival in same group. Conclusions: EGFR increased gene copy number is an independent negative prognostic factor in surgically resected NA-NSCLC.

Epidermal growth factor receptor (EGFR) gene copy number in colorectal adenoma-carcinoma progression

2012 ◽  
Vol 205 (12) ◽  
pp. 630-635 ◽  
Author(s):  
Marcella Flora ◽  
Simonetta Piana ◽  
Cristina Bassano ◽  
Alessandra Bisagni ◽  
Loredana De Marco ◽  
...  
Keyword(s):  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Colorectal Adenoma ◽  
Copy Number ◽  
Gene Copy Number ◽  
Growth Factor Receptor ◽  
Gene Copy ◽  
Egfr Gene ◽  
Epidermal Growth

Increased Epidermal Growth Factor Receptor Gene Copy Number Is Associated With Poor Prognosis in Head and Neck Squamous Cell Carcinomas

2006 ◽  
Vol 24 (25) ◽  
pp. 4170-4176 ◽  
Author(s):  
Christine H. Chung ◽  
Kim Ely ◽  
Loris McGavran ◽  
Marileila Varella-Garcia ◽  
Joel Parker ◽  
...  
Keyword(s):  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Copy Number ◽  
Poor Prognosis ◽  
Gene Copy Number ◽  
Growth Factor Receptor ◽  
Gene Copy ◽  
Positive Group ◽  
Egfr Gene ◽  
Epidermal Growth

Purpose High epidermal growth factor receptor (EGFR) gene copy number is associated with poor prognosis in lung cancer, but such findings have not been reported for HNSCC. A better understanding of the EGFR pathway may improve the use of EGFR inhibitors in HNSCC. Patients and Methods EGFR status was analyzed in 86 tumor samples from 82 HNSCC patients by fluorescent in situ hybridization (FISH) to determine EGFR gene copy number, by polymerase chain reaction and direct sequencing for activating mutations, and by DNA microarray and immunohistochemistry for RNA and protein expression. The results were associated with patient characteristics and clinical end points. Results Forty-three (58%) of 75 samples with FISH results demonstrated EGFR high polysomy and/or gene amplification (FISH positive). The FISH-positive group did not differ from the FISH-negative group with respect to age, sex, race, tumor grade, subsites and stage, or EGFR expression by analyses of RNA or protein. No activating EGFR mutations were found. However, the FISH-positive group was associated with worse progression-free and overall survival (P < .05 and P < .01, respectively; log-rank test). When microarray data were interrogated using the FISH results as a supervising parameter, ECop (which is known to coamplify with EGFR and regulate nuclear factor-kappa B transcriptional activity) had higher expression in FISH-positive tumors. Conclusion High EGFR gene copy number by FISH is frequent in HNSCC and is a poor prognostic indicator. Additional investigation is indicated to determine the biologic significance and implications for EGFR inhibitor therapies in HNSCC.

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