The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.
Stratification of Pancreatic Ductal Adenocarcinomas Based on Tumor and Microenvironment Features
Abstract
Background & aims Genomic studies have revealed subtypes of pancreatic ductal adenocarcinoma (PDA) based on their molecular features, but different studies have reported different classification systems. It is a challenge to obtain high-quality, freshly frozen tissue for clinical analysis and determination of PDA subtypes. We aimed to redefine subtypes of PDA using a large number of formalin-fixed and paraffin-embedded PDA samples, which are more amenable to routine clinical evaluation.Methods We collected PDA samples from 309 consecutive patients who underwent surgery from September 1996 through December 2010 at 4 academic hospitals in Europe; nontumor tissue samples were not included. Samples were formalin fixed and paraffin embedded. DNA and RNA were isolated; gene expression, targeted DNA sequencing, and immunohistochemical analyses were performed. We used independent component analysis to deconvolute normal, tumor, and microenvironment transcriptome patterns in samples. We devised classification systems from an unsupervised analysis using a consensus clustering approach of our data set after removing normal contamination components. We associated subtypes with overall survival and disease-free survival of patients using Cox proportional hazards regression with estimation of hazard ratios and 95% confidence interval. We used The Cancer Genome Consortium and International Cancer Genome Consortium PDA data sets as validation cohorts.Results We validated the previously reported basal-like and classical tumor-specific subtypes of PDAs. We identified features of the PDA, including microenvironment gene expression patterns, that allowed tumors to be categorized into 5 subtypes, called pure basal like, stroma activated, desmoplastic, pure classical, and immune classical. These PDA subtypes have features of cancer cells and immune cells that could be targeted by pharmacologic agents. Tumor subtypes were associated with patient outcomes, based on analysis of our data set and the International Cancer Genome Consortium and The Cancer Genome Consortium PDA data sets. We also observed an exocrine signal associated with acinar cell contamination (from pancreatic tissue).Conclusions We identified a classification system based on gene expression analysis of formalin-fixed PDA samples. We identified 5 PDA subtypes, based on features of cancer cells and the tumor microenvironment. This system might be used to select therapies and predict patient outcomes. We found evidence that the previously reported exocrine-like (called ADEX) tumor subtype resulted from contamination with pancreatic acinar cells. ArrayExpress accession number: E-MTAB-6134.
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“they suggested that their findings demonstrate that the Bailey ADEX subtype is likely contamination of pancreatic acinar cells.”
From Pancreatic cancer: Advances and challenges (2023) · cites this paper as [133]
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“Puleo et al. identified five subtypes, termed “pure basal like”, “stroma activated”, “desmoplastic”, “pure classical”, and “immune classical”133.”
From Pancreatic cancer: Advances and challenges (2023) · cites this paper as [133]
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Metadata
- Authors
- Puleo, F., Nicolle, R., Blum, Y., Cros, J., Marisa, L., Demetter, P., Quertinmont, E., Svrcek, M., Elarouci, N., Iovanna, J., Franchimont, D., Verset, L., Galdon, M. G., Devière, J., de Reyniès, A., Laurent-Puig, P., Van Laethem, J.-L., Bachet, J.-B., & Maréchal, R.
- Affiliations
- Université Libre de Bruxelles (BE)
- La Ligue Contre le Cancer (FR)
- Erasmus Hospital (BE)
- Hôpital Saint-Antoine (FR)
- Centre National de la Recherche Scientifique (FR)
- Pitié-Salpêtrière Hospital (FR)
- Corresponding author
- Puleo, Francesco
- ORCID
- Venue
- Gastroenterology
- Publisher
- Elsevier BV
- Published
- 2018-12
- Volume
- 155
- Issue
- 6
- Pages
- 1999-2013.e3
- ISSN
- 0016-5085 (ISSN-L)
- OpenAlex
- W2889433609
- Cited by
- 563
- References
- 34
- Citations by year
- 2026: 53 · 2025: 63 · 2024: 66 · 2023: 87 · 2022: 81 · 2021: 109 · 2020: 72 · 2019: 28 · 2018: 4
- FWCI
- 20.20
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Gastroenterology (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
- Topics
- Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Breast Cancer Treatment Studies
- Keywords
- pancreatic ductal adenocarcinoma, tumor subtypes, tumor microenvironment, gene expression profiling, formalin-fixed paraffin-embedded tissue, desmoplasia, basal-like subtype, classical subtype, overall survival, disease-free survival, independent component analysis, consensus clustering
- MeSH terms
- Progression-Free Survival, Adenocarcinoma, Adult, Aged, Aged, 80 and over, DNA, Neoplasm, Female, Humans, Male, Middle Aged, Pancreas, Prospective Studies, Regression Analysis, RNA, Neoplasm, Gene Expression, Proportional Hazards Models, Sequence Analysis, DNA, Disease-Free Survival, Carcinoma, Pancreatic Ductal, Pancreas, Exocrine, Tumor Microenvironment, Transcriptome, Acinar Cells
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
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