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• W3201267629 abstract "Abstract Background Pancreatic ductal adenocarcinoma (PDAC) patients with diabetes mellitus (DM) have poor overall survival. Underlying mechanisms have not been fully clarified. This presents an opportunity for precision‐oncology for which we systematically analysed publicly‐available PDAC transcriptome data. Methods PDAC TCGA RNASeq data were used. Analyses were restricted to only ‘high purity’ and ‘head’ as anatomical site. Patients were characterised by: (1) Gene expression classification, and (2) Weighted gene correlation network analysis (WGCNA) to identify co‐expression patterns of genes. Newly identified gene signature subclasses of pancreatic head PDAC were associated with clinical and functional characteristics of patients. Results Consensus clustering identified two patient subclasses within PDAC involving pancreatic head. WGCNA identified 11 distinct networks of gene expression patterns across two sub‐classes. Class 1 patients demonstrated a significant upregulation of Module 5 and Module 6 gene expression compared to Class 2. Class 1 predominantly expressed the acinar, ductal and islet cell gene signatures. There were significantly less patients with DM in Class 1 subclass compared to Class 2 ( p < 0.037). Patients with DM had significant downregulation of pathways involved in cellular metabolism, hormone secretion and paucity of islet cell markers with no reduced survival compared with non‐diabetics. Conclusions A significant proportion of patients with PDAC of pancreatic head and DM exhibit downregulation of pathways involved in cellular metabolism, hormone secretion and signalling accompanied by a paucity of islet expression. Investigating the relationship between DM and gene expression profiles in patients with PDAC presents opportunities to improve overall survival in diabetics with PDAC." @default.
• W3201267629 created "2021-09-27" @default.
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• W3201267629 date "2021-09-13" @default.
• W3201267629 modified "2023-10-18" @default.
• W3201267629 title "Down‐regulation of metabolic pathways could offset the poor prognosis conferred by co‐existent diabetes mellitus in pancreatic (head) adenocarcinoma" @default.
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• W3201267629 doi "https://doi.org/10.1111/ans.17194" @default.
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