PMID- 20580220 OWN - NLM STAT- MEDLINE DCOM- 20101227 LR - 20111107 IS - 1879-0852 (Electronic) IS - 0959-8049 (Linking) VI - 46 IP - 12 DP - 2010 Aug TI - Tumour-mediated TRAIL-Receptor expression indicates effective apoptotic depletion of infiltrating CD8+ immune cells in clinical colorectal cancer. PG - 2314-23 LID - 10.1016/j.ejca.2010.05.025 [doi] AB - Expression of apoptosis-related proteins on tumour cells has been shown in several experimental models to be an efficient mechanism for a counterattack against host anti-tumour immune responses in solid tumours. Here we provide a clinical evidence for such a tumour immune escape mechanism by demonstrating tumour to T cell-directed death receptor signalling (TRAIL/TRAIL-Receptor (TRAIL-R)) in colorectal cancer (CRC). In a series of patients with CRC and completed 5-year follow up, we investigated apoptosis and expression levels of apoptosis-related proteins. Gene and protein profiles in the tumours demonstrated intratumoural upregulated gene expression for Fas, Fas-L, TRAIL, TRAIL-R and TNF-alpha (RT-qPCR). Levels of terminaldeoxynucleotidyl transferase-mediated deoxyuridinetriphosphate nick-end labelling (TUNEL)-positive events were positively correlated with TRAIL-R1-expression on tumour infiltrating immune cells. Among the immune cells, preferentially CD8+ T cells were found to express TRAIL-R1 while serial immunostaining in the same patient tumours showed abundant apoptotic (TUNEL-positive) immune cells. In conclusion, our results in tumour samples from CRC patients suggest TRAIL-R1-mediated apoptotic depletion of infiltrating immune cells (CD8+) in response to TRAIL expression by the tumour itself. This supports the notion of an efficient escape from tumour immune response and thus evasion from the attack of activated CD8+ T cells. These findings may enhance our understanding of tumour progression in CRC and might be helpful for the development of TRAIL and its death receptor-based therapy. CI - Copyright 2010 Elsevier Ltd. All rights reserved. FAU - Grimm, Martin AU - Grimm M AD - Department of Surgery I, Molecular Oncology and Immunology, University of Wuerzburg, 97080 Wuerzburg, Germany. FAU - Kim, Mia AU - Kim M FAU - Rosenwald, Andreas AU - Rosenwald A FAU - von Raden, Burkhard H A AU - von Raden BH FAU - Tsaur, Igor AU - Tsaur I FAU - Meier, Eva AU - Meier E FAU - Heemann, Uwe AU - Heemann U FAU - Germer, Christoph-Thomas AU - Germer CT FAU - Gasser, Martin AU - Gasser M FAU - Waaga-Gasser, Ana Maria AU - Waaga-Gasser AM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100625 PL - England TA - Eur J Cancer JT - European journal of cancer (Oxford, England : 1990) JID - 9005373 RN - 0 (Inhibitor of Apoptosis Proteins) RN - 0 (Receptors, Death Domain) RN - 0 (Receptors, TNF-Related Apoptosis-Inducing Ligand) RN - 82115-62-6 (Interferon-gamma) SB - IM EIN - Eur J Cancer. 2011 Oct;47(15):2373. von Rahden, Burkhard [corrected to von Raden, Burkhard H A] MH - Adult MH - Aged MH - Apoptosis/genetics MH - CD8-Positive T-Lymphocytes/*metabolism MH - Colorectal Neoplasms/genetics/*metabolism/pathology MH - Female MH - Humans MH - In Situ Nick-End Labeling MH - Inhibitor of Apoptosis Proteins/metabolism MH - Interferon-gamma/metabolism MH - Kaplan-Meier Estimate MH - Male MH - Middle Aged MH - Receptors, Death Domain/metabolism MH - Receptors, TNF-Related Apoptosis-Inducing Ligand/*metabolism MH - Up-Regulation EDAT- 2010/06/29 06:00 MHDA- 2010/12/28 06:00 CRDT- 2010/06/29 06:00 PHST- 2009/12/09 00:00 [received] PHST- 2010/05/19 00:00 [revised] PHST- 2010/05/24 00:00 [accepted] PHST- 2010/06/29 06:00 [entrez] PHST- 2010/06/29 06:00 [pubmed] PHST- 2010/12/28 06:00 [medline] AID - S0959-8049(10)00449-1 [pii] AID - 10.1016/j.ejca.2010.05.025 [doi] PST - ppublish SO - Eur J Cancer. 2010 Aug;46(12):2314-23. doi: 10.1016/j.ejca.2010.05.025. Epub 2010 Jun 25.