Cytoplasmic TRAIL-R1 is a positive prognostic marker in PDAC

2018 
Background The death receptors TRAIL-R1 and TRAIL-R2 are frequently overexpressed in cancer and there is an emerging evidence for their important role in malignant progression, also in the case of pancreatic ductal adenocarcinoma (PDAC). In their canonical localization at the plasma membrane, TRAIL-R1/−R2 may induce cell death and/or pro-inflammatory signaling leading to cell migration, invasion and metastasis. Although, they have repeatedly been found intracellular, in the cytoplasm and in the nucleus, their functions in intracellular locations are still not well understood. Likewise, studies dealing with the prognostic relevance of TRAIL-Rs located in particular cellular compartments are very rare. For PDAC, the correlation of nuclear TRAIL-R2 with worse patients’ prognosis has been shown recently. Corresponding data on TRAIL-R1 are not available so far.
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