Transcriptome analysis of microdissected pancreatic intraepithelial neoplastic lesions

Pancreatic ductal adenocarcinoma (PDAC) carries the most dismal prognosis of all solid tumours. Both the late clinical presentation of patients, due to lack of early symptoms, as well as the rapid and aggressive course of the disease contribute to the extremely high mortality of this malignancy. Rec...

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Veröffentlicht in:Oncogene 2005-10, Vol.24 (44), p.6626-6636
Hauptverfasser: Buchholz, Malte, Braun, Mike, Heidenblut, Anna, Kestler, Hans A, Klöppel, Günter, Schmiegel, Wolff, Hahn, Stephan A, Lüttges, Jutta, Gress, Thomas M
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container_end_page 6636
container_issue 44
container_start_page 6626
container_title Oncogene
container_volume 24
creator Buchholz, Malte
Braun, Mike
Heidenblut, Anna
Kestler, Hans A
Klöppel, Günter
Schmiegel, Wolff
Hahn, Stephan A
Lüttges, Jutta
Gress, Thomas M
description Pancreatic ductal adenocarcinoma (PDAC) carries the most dismal prognosis of all solid tumours. Both the late clinical presentation of patients, due to lack of early symptoms, as well as the rapid and aggressive course of the disease contribute to the extremely high mortality of this malignancy. Recently, a multistep progression model for PDAC integrating morphological, clinical and molecular evidence has been proposed. Putative precursor lesions, termed pancreatic intraepithelial neoplasia (PanIN), are classified into three different grades (PanIN-1 through -3) based on the degree of cellular atypia they display. We have conducted large-scale expression profiling analyses of microdissected cells from normal pancreatic ducts, PanINs of different grades and PDACs using whole-genome oligonucleotide microarrays. Verification of hybridisation results for selected genes was performed using quantitative real-time PCR and immunohistochemical analyses on PanIN tissue microarrays. Comparison of the expression profiles demonstrated that the greatest changes in gene expression occur between PanIN stages 1B and 2, suggesting that PanIN-2 may represent the first truly preneoplastic stage in PDAC progression. Our results identify a large number of potential target genes for the development of novel molecular diagnostic and therapeutic tools for the prevention and early diagnosis of PDAC and provide novel insights into the pathophysiological mechanisms involved in tumour progression in the pancreas.
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Both the late clinical presentation of patients, due to lack of early symptoms, as well as the rapid and aggressive course of the disease contribute to the extremely high mortality of this malignancy. Recently, a multistep progression model for PDAC integrating morphological, clinical and molecular evidence has been proposed. Putative precursor lesions, termed pancreatic intraepithelial neoplasia (PanIN), are classified into three different grades (PanIN-1 through -3) based on the degree of cellular atypia they display. We have conducted large-scale expression profiling analyses of microdissected cells from normal pancreatic ducts, PanINs of different grades and PDACs using whole-genome oligonucleotide microarrays. Verification of hybridisation results for selected genes was performed using quantitative real-time PCR and immunohistochemical analyses on PanIN tissue microarrays. Comparison of the expression profiles demonstrated that the greatest changes in gene expression occur between PanIN stages 1B and 2, suggesting that PanIN-2 may represent the first truly preneoplastic stage in PDAC progression. 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subjects Adenocarcinoma
Apoptosis
Base Sequence
Biological and medical sciences
Carcinoma in Situ - genetics
Cell Biology
Cell physiology
Cell transformation and carcinogenesis. Action of oncogenes and antioncogenes
Cluster Analysis
DNA microarrays
DNA Primers
Fundamental and applied biological sciences. Psychology
Gene expression
Gene Expression Profiling
Genomes
Human Genetics
Humans
Hybridization
Immunohistochemistry
Internal Medicine
Malignancy
Medical prognosis
Medicine
Medicine & Public Health
Molecular and cellular biology
Morphology
Mortality
Oligonucleotide Array Sequence Analysis
Oligonucleotides
Oncology
original-paper
Pancreas
Pancreatic cancer
Pancreatic Neoplasms - genetics
Pathology
RNA, Messenger - genetics
Solid tumors
Surgery
Transcriptomes
title Transcriptome analysis of microdissected pancreatic intraepithelial neoplastic lesions
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