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Gehrmann, M.* ; Specht, H.M.* ; Bayer, C.* ; Brandstetter, M.* ; Chizzali, B.* ; Duma, M.* ; Breuninger, S.* ; Hube, K.* ; Lehnerer, S.* ; van Phi, V.* ; Sage, E.H.* ; Schmid, T.E.* ; Sedelmayr, M.* ; Schilling, D. ; Sievert, W. ; Stangl, S.* ; Multhoff, G.

Hsp70 - a biomarker for tumor detection and monitoring of outcome of radiation therapy in patients with squamous cell carcinoma of the head and neck.

Radiat. Oncol. 9:131 (2014)
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BACKGROUND: Tumor but not normal cells frequently overexpress heat shock protein 70 (Hsp70) and present it on their cell surface (mHsp70) from where it can be actively released. Therefore, membrane (mHsp70) and soluble Hsp70 (sHsp70) were investigated as potential tumor biomarkers and for monitoring the outcome of radiation therapy. METHODS: Biopsies and blood were collected from patients with squamous cell carcinoma of the head and neck (SCCHN) at different time points (before, during therapy and in the follow-up period). Hsp70 membrane expression was determined on single cell suspensions of tumor biopsies and reference tissues by flow cytometry, sHsp70 protein and antibody levels were determined in the serum of patients and healthy donors by ELISA and NK cell markers that are related to the presence of sHsp70 were analyzed in the patient's peripheral blood lymphocytes (PBL). RESULTS: Tumor biopsies exhibited significantly increased mHsp70 expression levels compared to the reference tissue. Soluble Hsp70 levels were significantly higher in SCCHN patients compared to healthy human volunteers and high mHsp70 expression levels on tumor cells were associated with high sHsp70 levels in the serum of patients. Following surgery and radiotherapy sHsp70 levels in patients dropped in patients without tumor relapse in the follow-up period. In contrast to sHsp70 protein, anti-Hsp70 antibody levels remained nearly unaltered in the serum of SCCHN patients before and after therapy. Furthermore, sHsp70 protein but not anti-Hsp70 antibody levels were found to be associated with the tumor volume in SCCHN patients before start of therapy. The expression densities of the activatory NK cell markers CD56, CD94, NKG2D, NKp30, Nkp44, and NKp46 differed in patients following therapeutic intervention. A significant increase in the density of NKG2D was observed in SCCHN patients in the follow-up period after surgery and radiotherapy. CONCLUSION: We suggest sHsp70 as a potential biomarker for detecting tumors and for monitoring the clinical outcome of radiotherapy in SCCHN patients.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Hsp70 ; Tumor ; Biomarker ; Radiation Therapy; Natural-killer-cells; Lung-cancer Patients; Nk Cells; Heat-shock-protein-70 Hsp70; Colorectal-cancer; Shock Proteins; Serum Hsp70; Expression; Proteomics; Pathway
Language english
Publication Year 2014
HGF-reported in Year 2014
ISSN (print) / ISBN 1748-717X
e-ISSN 1748-717X
Journal Radiation Oncology
Quellenangaben Volume: 9, Issue: 1, Pages: , Article Number: 131 Supplement: ,
Publisher BioMed Central
Publishing Place London
Reviewing status Peer reviewed
Institute(s) Institute of Biological and Medical Imaging (IBMI)
POF-Topic(s) 30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Research field(s) Enabling and Novel Technologies
PSP Element(s) G-521400-001
PubMed ID 24912482
DOI 10.1186/1748-717X-9-131
WOS ID WOS:000338256900001
Scopus ID 84903551848
Erfassungsdatum 2014-07-02
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