Soluble Epidermal Growth Factor Receptor (sEGFR) and Carcinoembryonic Antigen (CEA) Concentration in Patients with Non-small Cell Lung Cancer: Correlation with Survival After Erlotinib and Gefitinib Treatment
Overview
Authors
Affiliations
Background: In patients with non-small cell lung cancer (NSCLC), a higher response rate can be achieved with epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) when selection for therapy is guided by mutation analysis or gene amplification. However, both tests are complex and require tumour tissue. Simple methods to identify responders prior to EGFR-TKI treatment are urgently needed. This study aimed to define the relation between serum sEGFR levels, carcinoembryonic antigen (CEA) and survival in NSCLC patients treated with EGFR-TKIs.
Methods: Patients with stage III/IV NSCLC treated with gefitinib or erlotinib between July 2002 and December 2005 were reviewed. Levels of serum soluble EGFR (sEGFR) were determined by a sandwich quantitative enzyme-linked immunosorbent assay. A chemiluminescence immunoassay was used for CEA. The relation between sEGFR and survival was investigated.
Results: One hundred and two NSCLC patients, mainly stage IV (80%), were identified. Mean sEGFR at baseline was 55.9 μg/l (range 35.3-74.5 μg/l). The median CEA level was 11.1 μg/l (range <1.0-2938.0 μg/l). Median overall survival was 5.2 months (range 1-52 months). Decreasing log CEA values (HR 1.51, 95% CI 1.11-2.04, multivariate analysis) and increasing sEGFR values (HR 0.96, 95% CI 0.93-0.99, multivariate analysis) were both independently associated with prolonged survival. Higher levels of pre-treatment sEGFR were associated with lower risk of progressive disease within three months (p=0.04).
Conclusions: Both baseline sEGFR and CEA levels in NSCLC patients receiving EGFR-TKIs showed a significant correlation with survival. To distinguish whether these factors have a predictive or a prognostic value, validation is warranted in an independent patient series containing a control arm without EGFR-TKI treatment.
Wu Z, Dai Y, Chen L Cancer Manag Res. 2019; 11:8835-8843.
PMID: 31632143 PMC: 6789963. DOI: 10.2147/CMAR.S216037.
Moehler M, Maderer A, Ehrlich A, Foerster F, Schad A, Nickolay T BMC Cancer. 2019; 19(1):55.
PMID: 30634942 PMC: 6330479. DOI: 10.1186/s12885-018-5223-7.
Zhang W, Wei Y, Yu D, Xu J, Peng J Medicine (Baltimore). 2018; 97(16):e0460.
PMID: 29668619 PMC: 5916648. DOI: 10.1097/MD.0000000000010460.
Romero-Ventosa E, Blanco-Prieto S, Gonzalez-Pineiro A, Rodriguez-Berrocal F, Pineiro-Corrales G, Paez de la Cadena M Springerplus. 2015; 4:171.
PMID: 25918681 PMC: 4402684. DOI: 10.1186/s40064-015-0891-0.
Facchinetti F, Aldigeri R, Aloe R, Bortesi B, Ardizzoni A, Tiseo M Tumour Biol. 2015; 36(8):5943-51.
PMID: 25731731 DOI: 10.1007/s13277-015-3269-6.