Title |
Hif1a Deletion Reveals Pro-Neoplastic Function of B Cells in Pancreatic Neoplasia
|
---|---|
Published in |
Cancer Discovery, March 2016
|
DOI | 10.1158/2159-8290.cd-15-0822 |
Pubmed ID | |
Authors |
Kyoung Eun Lee, Michelle Spata, Lauren J Bayne, Elizabeth L Buza, Amy C Durham, David Allman, Robert H Vonderheide, M Celeste Simon |
Abstract |
Pancreatic ductal adenocarcinoma (PDAC) is a leading cause of cancer-related deaths worldwide, with an exceedingly low 5-year survival rate. PDAC tumors are characterized by an extensive desmoplastic stromal response and hypovascularity, suggesting that tumor hypoxia could regulate PDAC initiation and/or progression. Using a well-defined, autochthonous KrasG12D-driven murine model, as well as human tumors, we demonstrate that hypoxia and stabilization of hypoxia-inducible factor 1α (HIF1α), a principal mediator of hypoxic adaptation, emerge early during preinvasive stages of PDAC. Surprisingly, pancreas-specific Hif1α deletion drastically accelerated KrasG12D-driven pancreatic neoplasia, and was accompanied by significant increases in intrapancreatic B lymphocytes, featuring prominent influx of a rare "B1b" B cell subtype. Finally, treatment of HIF1α-deficient mice with B cell-depleting αCD20 monoclonal antibodies inhibited progression of pancreatic intraepithelial neoplasia (PanIN). Our data reveal a previously unrecognized role for B cells in promoting pancreatic tumorigenesis, and implicate HIF1α as a critical regulator of PDAC development. |
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Mendeley readers
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