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The 2014 mouse study showing that removing the scar-forming cells around pancreatic tumours made the cancers more aggressive and the mice die sooner, the warning that the stroma is not simply an obstacle to be cleared.
Özdemir and colleagues in Raghu Kalluri's laboratory generated transgenic mice able to delete alpha-SMA-positive myofibroblasts in pancreatic cancer. Depletion starting at either the precursor (pancreatic intraepithelial neoplasia) or the invasive stage led to invasive, undifferentiated tumours with enhanced hypoxia, epithelial-to-mesenchymal transition and cancer stem cells, and shortened survival. In patients, fewer myofibroblasts in the tumour also correlated with reduced survival. Depleted tumours had suppressed immune surveillance with more CD4-positive Foxp3-positive regulatory T cells; they did not respond to gemcitabine, but anti-CTLA4 immunotherapy reversed the acceleration and prolonged survival. The authors underscore the need for caution in targeting carcinoma-associated fibroblasts.
Together with the negative HALO-301 trial of hyaluronidase this ended the first, blunt version of stromal targeting; second-generation ideas aim to reprogramme rather than remove the stroma.
Shares Virtual microdissection identifies distinct tumor- and stroma-specific subtypes of pancreatic ductal adenocarcinoma, Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares Hot vs cold tumours, Cold tumours and the immunosuppressive microenvironment, Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares MD Anderson Cancer Center, Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.
Shares Pancreatic cancer roadmap: from Whipple's operation to gemcitabine, FOLFIRINOX, adjuvant chemotherapy, PARP inhibition, KRAS inhibition, vaccines and the surveillance question, Pancreatic ductal adenocarcinoma and the tag pancreatic-evidence.