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Proton Pump Inhibitors Reduce Pancreatic Adenocarcinoma Progression by Selectively Targeting H + , K + -ATPases in Pancreatic Cancer and Stellate Cells.
- Source :
-
Cancers [Cancers (Basel)] 2020 Mar 10; Vol. 12 (3). Date of Electronic Publication: 2020 Mar 10. - Publication Year :
- 2020
-
Abstract
- Pancreatic duct cells are equipped with acid/base transporters important for exocrine secretion. Pancreatic ductal adenocarcinoma (PDAC) cells may utilize such transporters to acidify extracellular tumor microenvironment, creating a niche favoring cell proliferation, fibrosis and resistance to chemotherapy-all contributing to the notoriously bad prognosis of this disease. Here, we report that gastric and non-gastric H <superscript>+</superscript> , K <superscript>+</superscript> -ATPases (coded by ATP4A and ATP12A ) are overexpressed in human and murine pancreatic cancer and that we can target them specifically with proton pump inhibitors (PPIs) and potassium-competitive acid blockers (P-CABs) in in vitro models of PDAC. Focusing on pantoprazole, we show that it significantly reduced human cancer cell proliferation by inhibiting cellular H <superscript>+</superscript> extrusion, increasing K <superscript>+</superscript> conductance and promoting cyclin D1-dependent cell cycle arrest and preventing STAT3 activation. Pantoprazole also decreased collagen secretion from pancreatic stellate cells. Importantly, in vivo studies show that pantoprazole treatment of tumor-bearing mice reduced tumor size, fibrosis and expression of angiogenic markers. This work provides the first evidence that H <superscript>+</superscript> , K <superscript>+</superscript> -ATPases contribute to PDAC progression and that these can be targeted by inhibitors of these pumps, thus proving a promising therapeutic strategy.
Details
- Language :
- English
- ISSN :
- 2072-6694
- Volume :
- 12
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Cancers
- Publication Type :
- Academic Journal
- Accession number :
- 32164284
- Full Text :
- https://doi.org/10.3390/cancers12030640