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<h4>Background</h4>Lung cancer remains the leading cause of cancer-related death, largely owing to the lack of effective treatments. A tumour vascular targeting strategy presents an attractive alternative; however, the molecular signature of the vasculature in lung cancer is poorly explored. This work aimed to identify novel tumour vascular targets in lung cancer.<h4>Methods</h4>Enzymatic digestion of fresh tissue followed by endothelial capture with Ulex lectin-coated magnetic beads was used to isolate the endothelium from fresh tumour specimens of lung cancer patients. Endothelial isolates from the healthy and tumour lung tissue were subjected to whole human genome expression profiling using microarray technology.<h4>Results</h4>Bioinformatics analysis identified tumour endothelial expression of angiogenic factors, matrix metalloproteases and cell-surface transmembrane proteins. Predicted novel tumour vascular targets were verified by RNA-seq, quantitative real-time PCR analysis and immunohistochemistry. Further detailed expression profiling of STEAP1 on 82 lung cancer patients confirmed STEAP1 as a novel target in the tumour vasculature. Functional analysis of STEAP1 using siRNA silencing implicates a role in endothelial cell migration and tube formation.<h4>Conclusions</h4>The identification of cell-surface tumour endothelial markers in lung is of interest in therapeutic antibody and vaccine development.

Original publication

DOI

10.1038/bjc.2014.626

Type

Journal article

Journal

British journal of cancer

Publication Date

02/2015

Volume

112

Pages

485 - 494

Addresses

1] School of Immunity and Infection, Institute for Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK [2] School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.

Keywords

Lung, Endothelium, Vascular, Humans, Carcinoma, Non-Small-Cell Lung, Lung Neoplasms, Neovascularization, Pathologic, Microarray Analysis, Gene Expression Profiling, Sequence Analysis, RNA, Aged, Aged, 80 and over, Middle Aged, Female, Male, Genetic Association Studies, Molecular Targeted Therapy, Real-Time Polymerase Chain Reaction, Biomarkers, Tumor