Transcriptional variations in the wider peritumoral tissue environment of pancreatic cancer

Transcriptional profiling was performed on 452 RNA preparations isolated from various types of pancreatic tissue from tumour patients and healthy donors, with a particular focus on peritumoral samples. Pancreatic ductal adenocarcinomas (PDAC) and cystic tumours were most different in these non-tumor...

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Hauptverfasser: Bauer, Andrea (VerfasserIn) , Giese, Nathalia (VerfasserIn) , Heller, Anette (VerfasserIn) , Strobel, Oliver (VerfasserIn) , Hackert, Thilo (VerfasserIn) , Büchler, Markus W. (VerfasserIn) , Hoheisel, Jörg D. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2018
In: International journal of cancer
Year: 2017, Jahrgang: 142, Heft: 5, Pages: 1010-1021
ISSN:1097-0215
DOI:10.1002/ijc.31087
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1002/ijc.31087
Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ijc.31087
Volltext
Verfasserangaben:Andrea S. Bauer, Petr V. Nazarov, Nathalia A. Giese, Stefania Beghelli, Anette Heller, William Greenhalf, Eithne Costello, Arnaud Muller, Melanie Bier, Oliver Strobel, Thilo Hackert, Laurent Vallar, Aldo Scarpa, Markus W. Büchler, John P. Neoptolemos, Stephanie Kreis, Jörg D. Hoheisel

MARC

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520 |a Transcriptional profiling was performed on 452 RNA preparations isolated from various types of pancreatic tissue from tumour patients and healthy donors, with a particular focus on peritumoral samples. Pancreatic ductal adenocarcinomas (PDAC) and cystic tumours were most different in these non-tumorous tissues surrounding them, whereas the actual tumours exhibited rather similar transcript patterns. The environment of cystic tumours was transcriptionally nearly identical to normal pancreas tissue. In contrast, the tissue around PDAC behaved a lot like the tumour, indicating some kind of field defect, while showing far less molecular resemblance to both chronic pancreatitis and healthy tissue. This suggests that the major pathogenic difference between cystic and ductal tumours may be due to their cellular environment rather than the few variations between the tumours. Lack of correlation between DNA methylation and transcript levels makes it unlikely that the observed field defect in the peritumoral tissue of PDAC is controlled to a large extent by such epigenetic regulation. Functionally, a strikingly large number of autophagy-related transcripts was changed in both PDAC and its peritumoral tissue, but not in other pancreatic tumours. A transcription signature of 15 autophagy-related genes was established that permits a prognosis of survival with high accuracy and indicates the role of autophagy in tumour biology. 
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