Author of

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  P3.04 - Poster Session/ Biology, Pathology, and Molecular Testing (ID 235)

  • Event: WCLC 2015
  • Type: Poster
  • Track: Biology, Pathology, and Molecular Testing
  • Presentations: 1
  • Moderators:
  • Coordinates: 9/09/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)

  • 15465

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    P3.04-083 - FGFR1, 2 and 3 Expression in Early Stage Non-Small-Cell Lung Cancer (ID 837)

    09:30 - 09:30  |  Author(s): A.J. Bosma
    • Abstract
    • Slides

    Background:
    The aim of this study was to identify the protein expression levels of Fibroblast Growth Factor Receptors (FGFR) 1, 2 and 3 in early-stage non-small-cell lung carcinoma (NSCLC). Additionally, we performed a screen to define the frequency of FGFR3-TACC3 translocation and FGFR3 amplification.
    
    Methods:
    Archived tissue from 653 NSCLC samples (adenocarcinoma (AC), squamous cell carcinoma (SCC) and large cell carcinoma (LCC)) was analyzed with immunohistochemistry (IHC) for expression of FGFR1, 2 and 3. Expression levels of FGFR1, 2 and 3 were then correlated with clinicopathological features. The presence of FGFR3-TACC3 translocation was detected with RT-PCR and FGFR3 amplification was detected with FISH.
    
    Results:
    High protein expression of FGFR1, 2 and 3 was shown in 65 (10.5%), 78 (12.9%) and 20 (3.2%) of NSCLC tumor samples, respectively. Expression of FGFR1 was associated with light smoking (p = 0.007), AC (p < 0.000) and worse overall survival (p < 0.04). Expression of FGFR2 was associated with female sex (p < 0.001), younger age (p = 0.01) and AC (p < 0.000). Expression of FGFR3 was associated with male sex (p = 0.047), older patients (p = 0.01) and SCC (p < 0.000). FGFR3-TACC3 fusion was shown in 2.8% (6/210). In 45 FGFR3 IHC positive samples, two samples were FGFR3 amplified (4.4%) and one showed gain (2.2%).
    
    Conclusion:
    We show that FGFR1, 2 and 3 proteins are expressed in a significant number of NSCLC and identify some of the underlying molecular mechanisms. FGFR1 (but not FGFR2 and 3) protein overexpression is correlated with significant worse overall survival. FGFR1, 2 and 3 protein overexpression may become a new target of treatment in patients with NSCLC.
    
    

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