Annals of Oncology Advance Access published online on July 23, 2009
Annals of Oncology, doi:10.1093/annonc/mdp296
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Co-expression of PDGF-B and VEGFR-3 strongly correlates with lymph node metastasis and poor survival in non-small-cell lung cancer
1 Department of Oncology, Institute of Clinical Medicine, University of Tromso, Tromso
2 Department of Oncology, University Hospital of Northern Norway, Tromso
3 Institute of Medical Biology, University of Tromso, Tromso
4 Department of Pathology, University Hospital of Northern Norway, Tromso
5 Department of Pathology, Nordland Central Hospital, Bodo, Norway
* Correspondence to: Dr T. Donnem, Department of Oncology, Institute of Clinical Medicine, University of Tromso, 9037 Tromso, Norway. Tel: +47-77626000; Fax: +47-77626779; E-mail: tom.donnem{at}uit.no
Background: Platelet-derived growth factors (PDGFs) and vascular endothelial growth factors and their receptors [platelet-derived growth factor receptors (PDGFRs) and vascular endothelial growth factor receptors (VEGFRs)] are related to both angiogenesis and lymphangiogenesis and are important targets in new cancer treatment strategies. We aimed to study the PDGFs/PDGFRs and correlations with lymph node metastasis (LNM) and investigate the prognostic impact of the co-expression of PDGF-B and VEGFR-3 and its correlation with LNM.
Patients and methods: Tumor tissue samples from 335 resected patients with stage I–IIIA non-small-cell lung cancer (NSCLC) were obtained and tissue microarrays were constructed from duplicate cores of tumor cells and tumor-related stroma from each specimen. Immunohistochemistry was used to evaluate the expression of the molecular markers PDGF-A, PDGF-B, PDGF-C, PDGF-D, PDGFR-
, PDGFR-β, VEGFR-3 and D2-40.
Results: There were 232 N0 and 103 N+ patients (76 N1 and 27 N2). In multivariate analyses, high tumor cell PDGF-A expression (P = 0.017) correlated with LNM. Tumor cell co-expression of VEGFR-3 and PDGF-B correlated with nodal metastasis and was an independent indicator of poor prognosis (hazard ratio 4.8, confidence interval 95% 2.80–8.31, P < 0.001).
Conclusion: Tumor cell PDGF-A expression correlates with LNM, and the co-expression of PDGF-B and VEGFR-3 is strongly associated with poor survival in NSCLC patients.
angiogenesis, lymphangiogenesis, NSCLC, PDGFs, VEGFR-3
Received for publication October 16, 2008. Revision received January 11, 2009. Accepted for publication April 27, 2009.