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The inflammatory micromilieu: decisive role in tumor plasticity in pancreatic cancer

Subject Area Pathology
Term from 2016 to 2024
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 321664872
 
Final Report Year 2024

Final Report Abstract

Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive tumor characterized by a very distinct microenvironment, marked hypoxia, interaction with various non-neopaltic “host” cells, infiltrative growth, and high heterogeneity and plasticity. The research conducted during the recent funding period indicated that intratumor hypoxia induces the transcription factor Blimp1, which generates an aggressive tumor phenotype. Various correlative studies of molecular pathology and clinical imaging have shown that these particularly aggressive tumors, characterized by enhanced Blimp1 expression, hypoxia, pronounced stromal desmoplasia, epithelial-to-mesenchymal transition, and tumor budding, can already be identified and stratified using clinically implemented routine imaging. Building on this data, several software-supported, artificial intelligence-based algorithms were subsequently developed that can identify anatomical, benign and malignant structures in pancreatic tissue and liver metastases. Based on analyses of the tumor microenvironment, novel data were generated which further confirm that in particular Th17 cells induce an aggressive tumor phenotype in pancreatic cancer. Finally, the interaction of the pancreatic carcinoma with the anatomically surrounding fat tissue was studied. The analysis demonstrated that ADAMTS13, induced by adipose tissue in pancreatic carcinoma is significantly involved in the neoangiogenesis, migration, and invasion of tumor cells. All of these generated data show and illustrate a pronounced interaction of pancreatic cancer with the tumor microenvironment and provide derivable diagnostic and therapeutic implications.

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