Research Papers: Autophagy and Cell Death:
Analysis of the immune microenvironment in resected non-small cell lung cancer: the prognostic value of different T lymphocyte markers
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Marta Usó1,2,*, Eloisa Jantus-Lewintre2,3,*, Roy M. Bremnes4,5, Silvia Calabuig2,6, Ana Blasco7, Enrique Pastor8, Irene Borreda9, Sonia Molina-Pinelo10, Luis Paz-Ares10,11, Ricardo Guijarro8, Miguel Martorell12, Jerónimo Forteza9, Carlos Camps1,2,7 and Rafael Sirera3
1 Department of Medicine, Universitat de València, Valencia, Spain
2 Molecular Oncology Laboratory, Fundación Investigación, Hospital General Universitario de Valencia, Valencia, Spain
3 Department of Biotechnology, Universitat Politècnica de València, Valencia, Spain
4 Department of Oncology, University Hospital of North Norway, Tromso, Norway
5 Department of Clinical Medicine, The Arctic University of Norway, Tromso, Norway
6 Department of Pathology, Universitat de València, Valencia, Spain
7 Medical Oncology Department, Hospital General Universitario de Valencia, Valencia, Spain
8 Department of Thoracic Surgery, Hospital General Universitario de Valencia, Valencia, Spain
9 Instituto Valenciano de Patología, Universidad Católica de Valencia, Unidad Mixta de Patología Molecular Centro de Investigación Príncipe Felipe (CIPF)-Universidad Católica de Valencia (UCV), Valencia, Spain
10 Medical Oncology Department, Hospital 12 de Octubre & Centro Nacional de Investigaciones Oncológicas (CNIO), Madrid, Spain
11 Universidad Complutense de Madrid, Madrid, Spain
12 Department of Pathology, Hospital General Universitario de Valencia, Valencia, Spain
* These authros have contributed equally to this work
Rafael Sirera, email:
Carlos Camps, email:
Keywords:NSCLC, prognostic, immune-biomarker, tumor stroma, tumor compartment
Received: March 14, 2016 Accepted: July 15, 2016 Published: July 24, 2016
The prognosis of non-small cell lung cancer (NSCLC) remains poor and heterogeneous and new biomarkers are needed. As the immune system plays a pivotal role in cancer, the study of immune-related markers may provide valuable prognostic information of NSCLC. In 122 formalin-fixed, paraffin-embedded tumor tissue samples from early-stage NSCLC, tumor and tumor-near stromal areas were microdissected and gene expression levels of conventional and regulatory T cell markers were assessed by quantitative polymerase chain reaction. Also, the presence of infiltrating CD4+, CD8+, and FOXP3+ cells in tumor samples was assessed by immunohistochemistry. The relative proportion of conventional and regulatory T cells present in the tumor environment was assessed and found to be key to understand the importance that the immune system analysis has in the prognostics of NSCLC patients. The presence of CD8+ cells in the tumor compartment was associated with better outcome, whereas the presence of FOXP3+ cells was associated with worse overall survival. The negative prognostic value of combined biomarkers, indicating high levels of FOXP3 in the stroma and low levels of CD4 or CD8 in tumors, was observed at mRNA level and was validated by immunohistochemistry.In conclusion, the proportion of T helper and cytotoxic cells vs. regulatory T cells in different locations of the tumor microenvironment have opposite prognostic impacts in resected NSCLC.
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