Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm
Tissue hypoxia controls cell differentiation in the embryonic pancreas, and promotes tumor growth in pancreatic cancer. The cellular response to hypoxia is controlled by the hypoxia-inducible factor (HIF) proteins, including HIF2α. Previous studies of HIF action in the pancreas have relied on loss-o...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-01-01
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| Series: | Cellular and Molecular Gastroenterology and Hepatology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352345X17301558 |
| _version_ | 1811304958938578944 |
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| author | Heather K. Schofield Manuj Tandon Min-Jung Park Christopher J. Halbrook Sadeesh K. Ramakrishnan Esther C. Kim Jiaqi Shi M. Bishr Omary Yatrik M. Shah Farzad Esni Marina Pasca di Magliano |
| author_facet | Heather K. Schofield Manuj Tandon Min-Jung Park Christopher J. Halbrook Sadeesh K. Ramakrishnan Esther C. Kim Jiaqi Shi M. Bishr Omary Yatrik M. Shah Farzad Esni Marina Pasca di Magliano |
| author_sort | Heather K. Schofield |
| collection | DOAJ |
| description | Tissue hypoxia controls cell differentiation in the embryonic pancreas, and promotes tumor growth in pancreatic cancer. The cellular response to hypoxia is controlled by the hypoxia-inducible factor (HIF) proteins, including HIF2α. Previous studies of HIF action in the pancreas have relied on loss-of-function mouse models, and the effects of HIF2α expression in the pancreas have remained undefined.
Methods: We developed several transgenic mouse models based on the expression of an oxygen-stable form of HIF2α, or indirect stabilization of HIF proteins though deletion of von Hippel-Lindau, thus preventing HIF degradation. Furthermore, we crossed both sets of animals into mice expressing oncogenic KrasG12D in the pancreas.
Results: We show that HIF2α is not expressed in the normal human pancreas, however, it is up-regulated in human chronic pancreatitis. Deletion of von Hippel-Lindau or stabilization of HIF2α in mouse pancreata led to the development of chronic pancreatitis. Importantly, pancreatic HIF1α stabilization did not disrupt the pancreatic parenchyma, indicating that the chronic pancreatitis phenotype is specific to HIF2α. In the presence of oncogenic Kras, HIF2α stabilization drove the formation of cysts resembling mucinous cystic neoplasm (MCN) in humans. Mechanistically, we show that the pancreatitis phenotype is linked to expression of multiple inflammatory cytokines and activation of the unfolded protein response. Conversely, MCN formation is linked to activation of Wnt signaling, a feature of human MCN.
Conclusions: We show that pancreatic HIF2α stabilization disrupts pancreatic homeostasis, leading to chronic pancreatitis, and, in the context of oncogenic Kras, MCN formation. These findings provide new mouse models of both chronic pancreatitis and MCN, as well as illustrate the importance of hypoxia signaling in the pancreas. |
| first_indexed | 2024-04-13T08:17:58Z |
| format | Article |
| id | doaj.art-53f16139687c433192293bdf2c388f4a |
| institution | Directory Open Access Journal |
| issn | 2352-345X |
| language | English |
| last_indexed | 2024-04-13T08:17:58Z |
| publishDate | 2018-01-01 |
| publisher | Elsevier |
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| series | Cellular and Molecular Gastroenterology and Hepatology |
| spelling | doaj.art-53f16139687c433192293bdf2c388f4a2022-12-22T02:54:44ZengElsevierCellular and Molecular Gastroenterology and Hepatology2352-345X2018-01-0152169185.e210.1016/j.jcmgh.2017.10.008Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic NeoplasmHeather K. Schofield0Manuj Tandon1Min-Jung Park2Christopher J. Halbrook3Sadeesh K. Ramakrishnan4Esther C. Kim5Jiaqi Shi6M. Bishr Omary7Yatrik M. Shah8Farzad Esni9Marina Pasca di Magliano10Department of Surgery, University of Michigan, Ann Arbor, MichiganDepartment of Surgery, University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PennsylvaniaDepartment of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MichiganDepartment of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MichiganDepartment of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MichiganDepartment of Surgery, University of Michigan, Ann Arbor, MichiganDepartment of Pathology, University of Michigan, Ann Arbor, MichiganDepartment of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MichiganDepartment of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MichiganDepartment of Surgery, University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PennsylvaniaDepartment of Surgery, University of Michigan, Ann Arbor, MichiganTissue hypoxia controls cell differentiation in the embryonic pancreas, and promotes tumor growth in pancreatic cancer. The cellular response to hypoxia is controlled by the hypoxia-inducible factor (HIF) proteins, including HIF2α. Previous studies of HIF action in the pancreas have relied on loss-of-function mouse models, and the effects of HIF2α expression in the pancreas have remained undefined. Methods: We developed several transgenic mouse models based on the expression of an oxygen-stable form of HIF2α, or indirect stabilization of HIF proteins though deletion of von Hippel-Lindau, thus preventing HIF degradation. Furthermore, we crossed both sets of animals into mice expressing oncogenic KrasG12D in the pancreas. Results: We show that HIF2α is not expressed in the normal human pancreas, however, it is up-regulated in human chronic pancreatitis. Deletion of von Hippel-Lindau or stabilization of HIF2α in mouse pancreata led to the development of chronic pancreatitis. Importantly, pancreatic HIF1α stabilization did not disrupt the pancreatic parenchyma, indicating that the chronic pancreatitis phenotype is specific to HIF2α. In the presence of oncogenic Kras, HIF2α stabilization drove the formation of cysts resembling mucinous cystic neoplasm (MCN) in humans. Mechanistically, we show that the pancreatitis phenotype is linked to expression of multiple inflammatory cytokines and activation of the unfolded protein response. Conversely, MCN formation is linked to activation of Wnt signaling, a feature of human MCN. Conclusions: We show that pancreatic HIF2α stabilization disrupts pancreatic homeostasis, leading to chronic pancreatitis, and, in the context of oncogenic Kras, MCN formation. These findings provide new mouse models of both chronic pancreatitis and MCN, as well as illustrate the importance of hypoxia signaling in the pancreas.http://www.sciencedirect.com/science/article/pii/S2352345X17301558PancreasHypoxiaHIF2αKrasG12DChronic PancreatitisMucinous Cystic Neoplasm |
| spellingShingle | Heather K. Schofield Manuj Tandon Min-Jung Park Christopher J. Halbrook Sadeesh K. Ramakrishnan Esther C. Kim Jiaqi Shi M. Bishr Omary Yatrik M. Shah Farzad Esni Marina Pasca di Magliano Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm Cellular and Molecular Gastroenterology and Hepatology Pancreas Hypoxia HIF2α KrasG12D Chronic Pancreatitis Mucinous Cystic Neoplasm |
| title | Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm |
| title_full | Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm |
| title_fullStr | Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm |
| title_full_unstemmed | Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm |
| title_short | Pancreatic HIF2α Stabilization Leads to Chronic Pancreatitis and Predisposes to Mucinous Cystic Neoplasm |
| title_sort | pancreatic hif2α stabilization leads to chronic pancreatitis and predisposes to mucinous cystic neoplasm |
| topic | Pancreas Hypoxia HIF2α KrasG12D Chronic Pancreatitis Mucinous Cystic Neoplasm |
| url | http://www.sciencedirect.com/science/article/pii/S2352345X17301558 |
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