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Ma J, Gong F, Kim E, Du JX, Leung C, Song Q, Logsdon CD, Luo Y, Li X, Lu W. Early elevations of RAS protein level and activity are critical for the development of PDAC in the context of inflammation. Cancer Lett 2024; 586:216694. [PMID: 38307409 PMCID: PMC11032208 DOI: 10.1016/j.canlet.2024.216694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 01/22/2024] [Accepted: 01/29/2024] [Indexed: 02/04/2024]
Abstract
The KRASG12D mutation was believed to be locked in a GTP-bound form, rendering it fully active. However, recent studies have indicated that the presence of mutant KRAS alone is insufficient; it requires additional activation through inflammatory stimuli to effectively drive the development of pancreatic ductal adenocarcinoma (PDAC). It remains unclear to what extent RAS activation occurs during the development of PDAC in the context of inflammation. Here, in a mouse model with the concurrent expression of KrasG12D/+ and inflammation mediator IKK2 in pancreatic acinar cells, we showed that, compared to KRASG12D alone, the cooperative interaction between KRASG12D and IKK2 rapidly elevated both the protein level and activity of KRASG12D and NRAS in a short term. This high level was sustained throughout the rest phase of PDAC development. These results suggest that inflammation not only rapidly augments the activity but also the protein abundance, leading to an enhanced total amount of GTP-bound RAS (KRASG12D and NRAS) in the early stage. Notably, while KRASG12D could be further activated by IKK2, not all KRASG12D proteins were in the GTP-bound state. Overall, our findings suggest that although KRASG12D is not fully active in the context of inflammation, concurrent increases in both the protein level and activity of KRASG12D as well as NRAS at the early stage by inflammation contribute to the rise in total GTP-bound RAS.
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Affiliation(s)
- Jianjia Ma
- School of Pharmaceutical Sciences & the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; Department of Medicine, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Fanghua Gong
- School of Pharmaceutical Sciences & the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Eunice Kim
- Department of Medicine, Stony Brook University, Stony Brook, NY, 11794, USA
| | - James Xianxing Du
- Department of Medicine, Stony Brook University, Stony Brook, NY, 11794, USA; Department of Pharmaceutical Sciences, School of Pharmacy, University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Cindy Leung
- Department of Medicine, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Qingchun Song
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Craig D Logsdon
- Department of Cancer Biology, MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yongde Luo
- School of Pharmaceutical Sciences & the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; Department of Medicine, Stony Brook University, Stony Brook, NY, 11794, USA.
| | - Xiaokun Li
- School of Pharmaceutical Sciences & the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Weiqin Lu
- Department of Medicine, Stony Brook University, Stony Brook, NY, 11794, USA; Department of Pharmaceutical Sciences, School of Pharmacy, University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA.
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Li X, He J, Xie K. Molecular signaling in pancreatic ductal metaplasia: emerging biomarkers for detection and intervention of early pancreatic cancer. Cell Oncol (Dordr) 2022; 45:201-225. [PMID: 35290607 DOI: 10.1007/s13402-022-00664-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2022] [Indexed: 11/27/2022] Open
Abstract
Pancreatic ductal metaplasia (PDM) is the transformation of potentially various types of cells in the pancreas into ductal or ductal-like cells, which eventually replace the existing differentiated somatic cell type(s). PDM is usually triggered by and manifests its ability to adapt to environmental stimuli and genetic insults. The development of PDM to atypical hyperplasia or dysplasia is an important risk factor for pancreatic intraepithelial neoplasia (PanIN) and pancreatic ductal adenocarcinoma (PDA). Recent studies using genetically engineered mouse models, cell lineage tracing, single-cell sequencing and others have unraveled novel cellular and molecular insights in PDM formation and evolution. Those novel findings help better understand the cellular origins and functional significance of PDM and its regulation at cellular and molecular levels. Given that PDM represents the earliest pathological changes in PDA initiation and development, translational studies are beginning to define PDM-associated cell and molecular biomarkers that can be used to screen and detect early PDA and to enable its effective intervention, thereby truly and significantly reducing the dreadful mortality rate of PDA. This review will describe recent advances in the understanding of PDM biology with a focus on its underlying cellular and molecular mechanisms, and in biomarker discovery with clinical implications for the management of pancreatic regeneration and tumorigenesis.
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Affiliation(s)
- Xiaojia Li
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, 510006, China
- Department of Pathology, The South China University of Technology School of Medicine, Guangzhou, China
| | - Jie He
- Institute of Digestive Diseases Research, The South China University of Technology School of Medicine, Guangzhou, China
| | - Keping Xie
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, 510006, China.
- Department of Pathology, The South China University of Technology School of Medicine, Guangzhou, China.
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3
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Li S, Xie K. Ductal metaplasia in pancreas. Biochim Biophys Acta Rev Cancer 2022; 1877:188698. [DOI: 10.1016/j.bbcan.2022.188698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/09/2022] [Accepted: 02/09/2022] [Indexed: 02/07/2023]
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Obesity and Pancreatic Cancer: Insight into Mechanisms. Cancers (Basel) 2021; 13:cancers13205067. [PMID: 34680216 PMCID: PMC8534007 DOI: 10.3390/cancers13205067] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Obesity is recognized as a chronic progressive disease and risk factor for many human diseases. The high and increasing number of obese people may underlie the expected increase in pancreatic cancer cases in the United States. There are several pathways discussed that link obesity with pancreatic cancer. Adipose tissue and adipose tissue-released factors may thereby play an important role. This review discusses selected mechanisms that may accelerate pancreatic cancer development in obesity. Abstract The prevalence of obesity in adults and children has dramatically increased over the past decades. Obesity has been declared a chronic progressive disease and is a risk factor for a number of metabolic, inflammatory, and neoplastic diseases. There is clear epidemiologic and preclinical evidence that obesity is a risk factor for pancreatic cancer. Among various potential mechanisms linking obesity with pancreatic cancer, the adipose tissue and obesity-associated adipose tissue inflammation play a central role. The current review discusses selected topics and mechanisms that attracted recent interest and that may underlie the promoting effects of obesity in pancreatic cancer. These topics include the impact of obesity on KRAS activity, the role of visceral adipose tissue, intrapancreatic fat, adipose tissue inflammation, and adipokines on pancreatic cancer development. Current research on lipocalin-2, fibroblast growth factor 21, and Wnt5a is discussed. Furthermore, the significance of obesity-associated insulin resistance with hyperinsulinemia and obesity-induced gut dysbiosis with metabolic endotoxemia is reviewed. Given the central role that is occupied by the adipose tissue in obesity-promoted pancreatic cancer development, preventive and interceptive strategies should be aimed at attenuating obesity-associated adipose tissue inflammation and/or at targeting specific molecules that mechanistically link adipose tissue with pancreatic cancer in obese patients.
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Abstract
ABSTRACT Microorganisms can help maintain homeostasis in humans by providing nutrition, maintaining hormone balance, and regulating inflammatory responses. In the case of imbalances, these microbes can cause various diseases, even malignancy. Pancreatic cancer (PC) is characterized by high tumor invasiveness, distant metastasis, and insensitivity to traditional chemotherapeutic drugs, and it is confirmed that PC is closely related to microorganisms. Recently, most studies based on clinical samples or case reports discussed the positive or negative relationships between microorganisms and PC. However, the specific mechanisms are blurry, especially the involved immunological pathways, and the roles of beneficial flora have usually been ignored. We reviewed studies published through September 2020 as identified using PubMed, MEDLINE, and Web of Science. We mainly introduced the traits of oral, gastrointestinal, and intratumoral microbes in PC and summarized the roles of these microbes in tumorigenesis and tumoral development through immunological pathways, in addition to illustrating the relationships between metabolic diseases with PC by microorganism. In addition, we identified microorganisms as biomarkers for early diagnosis and immunotherapy. This review will be significant for greater understanding the effect of microorganisms in PC and provide more meaningful guidance for future clinical applications.
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Affiliation(s)
- Xin Wei
- From the Department of Hepatobiliary and Pancreatic Surgery, The Second Hospital of Jilin University, Changchun
| | - Chunlei Mei
- Institute of Reproductive Health, Huazhong University of Science and Technology, Wuhan, China
| | - Xixi Li
- From the Department of Hepatobiliary and Pancreatic Surgery, The Second Hospital of Jilin University, Changchun
| | - Yingjun Xie
- From the Department of Hepatobiliary and Pancreatic Surgery, The Second Hospital of Jilin University, Changchun
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Choi JH, Lee SH, Huh G, Chun JW, You MS, Paik WH, Ryu JK, Kim YT. The association between use of statin or aspirin and pancreatic ductal adenocarcinoma: A nested case-control study in a Korean nationwide cohort. Cancer Med 2019; 8:7419-7430. [PMID: 31637875 PMCID: PMC6885885 DOI: 10.1002/cam4.2617] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 09/29/2019] [Accepted: 10/03/2019] [Indexed: 12/12/2022] Open
Abstract
Background Although several studies have suggested that aspirin and statins may help prevent pancreatic ductal adenocarcinoma (PDAC), this concept has been controversial. This study aimed to evaluate the association between use of statin or aspirin and PDAC in a nationwide large cohort. Methods In this nested case‐control study, we used data from a 12‐year nationwide longitudinal cohort in Korea. Cases with PDAC and controls who were matched to cases by age, sex, income, and index year at a 1:5 ratio were established. We used multivariate logistic regression analyses to identify the independent risk factors of PDAC. Results We identified a total of 827 patients with PDAC between 2007 and 2013, and included 4135 matched controls. Diabetes mellitus, chronic and acute pancreatitis, pancreatic cystic lesions, and cholelithiasis were independent risk factors for PDAC. Statin use (odds ratio [OR], 0.92; 95% confidence interval [CI] 0.76‐1.11; P = .344; adjusted OR [aOR], 0.70; 95% CI 0.56‐0.87; P = .001) was associated with a reduced risk of PDAC after correction of the confounding factors, but aspirin use (OR, 0.98; 95% CI 0.84‐1.15; P = .838; aOR 0.84; 95% CI 0.70‐1.01, P = .068) was not associated with PDAC. Among the patients with risk factors, both statin use (OR, 0.50; 95% CI 0.38‐0.66; P < .001; aOR, 0.62; 95% CI 0.45‐0.84; P = .002) and aspirin use (OR, 0.48; 95% CI 0.31‐0.67; P < .001; aOR 0.67; 95% CI 0.50‐0.89, P = .006) were associated with a reduced risk of PDAC. Conclusion This study suggests that statin use was associated with a reduced risk of PDAC incidence but aspirin use was not. Both statin use and aspirin use were associated a reduced risk of PDAC incidence for patients with risk factors.
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Affiliation(s)
- Jin Ho Choi
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Sang Hyub Lee
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Gunn Huh
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Jung Won Chun
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Min Su You
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Woo Hyun Paik
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Ji Kon Ryu
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Yong-Tae Kim
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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7
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Markosyan N, Li J, Sun YH, Richman LP, Lin JH, Yan F, Quinones L, Sela Y, Yamazoe T, Gordon N, Tobias JW, Byrne KT, Rech AJ, FitzGerald GA, Stanger BZ, Vonderheide RH. Tumor cell-intrinsic EPHA2 suppresses anti-tumor immunity by regulating PTGS2 (COX-2). J Clin Invest 2019; 129:3594-3609. [PMID: 31162144 DOI: 10.1172/jci127755] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Resistance to immunotherapy is one of the biggest problems of current oncotherapeutics. WhileT cell abundance is essential for tumor responsiveness to immunotherapy, factors that define the T cell inflamed tumor microenvironment are not fully understood. We conducted an unbiased approach to identify tumor-intrinsic mechanisms shaping the immune tumor microenvironment(TME), focusing on pancreatic adenocarcinoma because it is refractory to immunotherapy and excludes T cells from the TME. From human tumors, we identified EPHA2 as a candidate tumor intrinsic driver of immunosuppression. Epha2 deletion reversed T cell exclusion and sensitized tumors to immunotherapy. We found that PTGS2, the gene encoding cyclooxygenase-2, lies downstream of EPHA2 signaling through TGFβ and is associated with poor patient survival. Ptgs2 deletion reversed T cell exclusion and sensitized tumors to immunotherapy; pharmacological inhibition of PTGS2 was similarly effective. Thus, EPHA2-PTGS2 signaling in tumor cells regulates tumor immune phenotypes; blockade may represent a novel therapeutic avenue for immunotherapy-refractory cancers. Our findings warrant clinical trials testing the effectiveness of therapies combining EPHA2-TGFβ-PTGS2 pathway inhibitors with anti-tumor immunotherapy, and may change the treatment of notoriously therapy-resistant pancreatic adenocarcinoma.
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Affiliation(s)
| | - Jinyang Li
- Abramson Family Cancer Research Institute
| | - Yu H Sun
- Center for RNA Biology, Department of Biochemistry and Biophysics, Department of Urology, University of Rochester Medical Center, Rochester, New York, USA
| | | | | | | | | | - Yogev Sela
- Abramson Family Cancer Research Institute
| | | | | | | | - Katelyn T Byrne
- Department of Medicine.,Parker Institute for Cancer Immunotherapy
| | - Andrew J Rech
- Abramson Family Cancer Research Institute.,Parker Institute for Cancer Immunotherapy
| | - Garret A FitzGerald
- Department of Systems Pharmacology and Translational Therapeutics.,Institute for Translational Medicine and Therapeutics
| | - Ben Z Stanger
- Department of Medicine.,Abramson Family Cancer Research Institute.,Parker Institute for Cancer Immunotherapy.,Department of Cell and Developmental Biology.,Abramson Cancer Center, and
| | - Robert H Vonderheide
- Department of Medicine.,Abramson Family Cancer Research Institute.,Parker Institute for Cancer Immunotherapy.,Abramson Cancer Center, and.,Institute for Immunology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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8
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Hao F, Xu Q, Wang J, Yu S, Chang HH, Sinnett-Smith J, Eibl G, Rozengurt E. Lipophilic statins inhibit YAP nuclear localization, co-activator activity and colony formation in pancreatic cancer cells and prevent the initial stages of pancreatic ductal adenocarcinoma in KrasG12D mice. PLoS One 2019; 14:e0216603. [PMID: 31100067 PMCID: PMC6524808 DOI: 10.1371/journal.pone.0216603] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 04/24/2019] [Indexed: 01/06/2023] Open
Abstract
We examined the impact of statins on Yes-associated Protein (YAP) localization, phosphorylation and transcriptional activity in human and mouse pancreatic ductal adenocarcinoma (PDAC) cells. Exposure of sparse cultures of PANC-1 and MiaPaCa-2 cells to cerivastatin or simvastatin induced a striking re-localization of YAP from the nucleus to the cytoplasm and inhibited the expression of the YAP/TEAD-regulated genes Connective Tissue Growth Factor (CTGF) and Cysteine-rich angiogenic inducer 61 (CYR61). Statins also prevented YAP nuclear import and expression of CTGF and CYR61 stimulated by the mitogenic combination of insulin and neurotensin in dense culture of these PDAC cells. Cerivastatin, simvastatin, atorvastatin and fluvastatin also inhibited colony formation by PANC-1 and MiaPaCa-2 cells in a dose-dependent manner. In contrast, the hydrophilic statin pravastatin did not exert any inhibitory effect even at a high concentration (10 μM). Mechanistically, cerivastatin did not alter the phosphorylation of YAP at Ser127 in either PANC-1 or MiaPaCa-2 cells incubated without or with neurotensin and insulin but blunted the assembly of actin stress fiber in these cells. We extended these findings with human PDAC cells using primary KC and KPC cells, (expressing KrasG12D or both KrasG12D and mutant p53, respectively) isolated from KC or KPC mice. Using cultures of these murine cells, we show that lipophilic statins induced striking YAP translocation from the nucleus to the cytoplasm, inhibited the expression of Ctgf, Cyr61 and Birc5 and profoundly inhibited colony formation of these cells. Administration of simvastatin to KC mice subjected to diet-induced obesity prevented early pancreatic acini depletion and PanIN formation. Collectively, our results show that lipophilic statins restrain YAP activity and proliferation in pancreatic cancer cell models in vitro and attenuates early lesions leading to PDAC in vivo.
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Affiliation(s)
- Fang Hao
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- Tianjin Medical University, Tianjin, China
| | - Qinhong Xu
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- Xi'an Jiaotong University, Xi'an, China
| | - Jing Wang
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- Xi'an Jiaotong University, Xi'an, China
| | - Shuo Yu
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- Xi'an Jiaotong University, Xi'an, China
| | - Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- CURE: Digestive Diseases Research Center, Los Angeles, California, United States of America
| | - James Sinnett-Smith
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- CURE: Digestive Diseases Research Center, Los Angeles, California, United States of America
- VA Greater Los Angeles Health Care System, Los Angeles, California, United States of America
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- CURE: Digestive Diseases Research Center, Los Angeles, California, United States of America
| | - Enrique Rozengurt
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- CURE: Digestive Diseases Research Center, Los Angeles, California, United States of America
- VA Greater Los Angeles Health Care System, Los Angeles, California, United States of America
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Zhu XC, Zhang T. Antitumor mechanisms of cyclooxygenase and lipoxygenase. Shijie Huaren Xiaohua Zazhi 2018; 26:2029-2035. [DOI: 10.11569/wcjd.v26.i35.2029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Eicosanoids, as the metabolic product of arachidonic acid, play an important role in tumor development and metastasis. Cyclooxygenase (COX)-2 and lipoxygenase (LOX) are two key enzymes that mediate the metabolism of arachidonic acid. So far, great progress has been made on the research of COX-2 and prostaglandins, and it has been demonstrated that they can induce the imbalance between cell growth and apoptosis as well as tumor angiogenesis. LOX and its metabolites, such as hydroxyeicosatetraenoic acid (HETE) and leukotriene (LT), have received more and more attention for their role in tumor development. Research has proved that LT-B4 and 5-HETE participate in the occurrence and development of multiple tumors. Therefore, COX and LOX dual inhibitors prove a new approach to anti-tumor therapy.
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Affiliation(s)
- Xiao-Chao Zhu
- Department of General Surgery, Suqian First Hospital, Suqian 223800, Jiangsu Province, China
| | - Tuo Zhang
- Department of General Surgery, Suqian First Hospital, Suqian 223800, Jiangsu Province, China
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Abbruzzese JL, Andersen DK, Borrebaeck CA, Chari ST, Costello E, Cruz-Monserrate Z, Eibl G, Engleman EG, Fisher WE, Habtezion A, Kim SK, Korc M, Logsdon C, Lyssiotis CA, Pandol SJ, Rustgi A, Wolfe BM, Zheng L, Powers AC. The Interface of Pancreatic Cancer With Diabetes, Obesity, and Inflammation: Research Gaps and Opportunities: Summary of a National Institute of Diabetes and Digestive and Kidney Diseases Workshop. Pancreas 2018; 47:516-525. [PMID: 29702529 PMCID: PMC6361376 DOI: 10.1097/mpa.0000000000001037] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A workshop on "The Interface of Pancreatic Cancer with Diabetes, Obesity, and Inflammation: Research Gaps and Opportunities" was held by the National Institute of Diabetes and Digestive and Kidney Diseases on October 12, 2017. The purpose of the workshop was to explore the relationship and possible mechanisms of the increased risk of pancreatic ductal adenocarcinoma (PDAC) related to diabetes, the role of altered intracellular energy metabolism in PDAC, the mechanisms and biomarkers of diabetes caused by PDAC, the mechanisms of the increased risk of PDAC associated with obesity, and the role of inflammatory events and mediators as contributing causes of the development of PDAC. Workshop faculty reviewed the state of the current knowledge in these areas and made recommendations for future research efforts. Further knowledge is needed to elucidate the basic mechanisms contributing to the role of hyperinsulinemia, hyperglycemia, adipokines, and acute and chronic inflammatory events on the development of PDAC.
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Affiliation(s)
- James L. Abbruzzese
- Division of Medical Oncology, Department of Medicine, Duke University, Durham, NC
| | - Dana K. Andersen
- Division of Digestive Diseases and Nutrition, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | | | - Suresh T. Chari
- Division of Gastroenterology, Department of Medicine, Mayo Clinic, Rochester, MN
| | - Eithne Costello
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Zobeida Cruz-Monserrate
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, Ohio State University, Columbus, OH
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles
| | - Edgar G. Engleman
- Departments of Pathology and Medicine, Stanford University, Palo Alto, CA
| | | | - Aida Habtezion
- Division of Gastroenterology, Department of Medicine, Stanford University, Palo Alto, CA
| | - Seung K. Kim
- Departments of Developmental Biology and Internal Medicine, Stanford University, Palo Alto, CA
| | - Murray Korc
- Department of Medicine, Indiana University Simon Cancer Center, Indianapolis, IN
| | - Craig Logsdon
- Departments of Cancer Biology and Gastrointestinal Medical Oncology, MD Anderson Cancer Center, Houston, TX
| | - Costas A. Lyssiotis
- Division of Gastroenterology, Departments of Molecular and Integrative Physiology and Internal Medicine, University of Michigan, Ann Arbor, MI
| | - Stephen J. Pandol
- Department of Medicine and Biomedical Sciences, Cedars Sinai Medical Center
- Department of Medicine, University of California at Los Angeles, Los Angeles, CA
| | - Anil Rustgi
- Division of Gastroenterology, Department of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Bruce M. Wolfe
- Department of Surgery, Oregon Health and Science University, Portland, OR
| | - Lei Zheng
- Departments of Oncology and Surgery, Johns Hopkins University, Baltimore, MD
| | - Alvin C. Powers
- Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, Vanderbilt University Medical Center
- Department of Molecular Physiology & Biophysics, Vanderbilt University, VA Tennessee Valley Healthcare, Nashville, TN
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11
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Moriya C, Imai K, Taniguchi H. PRDM14 is overexpressed in chronic pancreatitis prior to pancreatic cancer. FEBS Open Bio 2018; 8:1733-1741. [PMID: 30338223 PMCID: PMC6168686 DOI: 10.1002/2211-5463.12519] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/14/2018] [Accepted: 08/23/2018] [Indexed: 02/06/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is an aggressive and lethal cancer that is typically diagnosed at a later stage with metastases and is difficult to treat. Therefore, investigating the mechanism of PDAC initiation is important to aid early‐stage cancer detection. PRDM14 is a transcription factor that maintains pluripotency in embryonic stem cells and is overexpressed in several cancers. We previously reported that PRDM14 is overexpressed and regulates cancer stem‐like phenotypes in PDAC, and herein, we assess whether PRDM14 expression increases prior to tumorigenesis. Through immunohistochemistry analyses of clinical tissues, we detected PRDM14‐positive cells in precursor pancreatic intraepithelial neoplasia and chronic pancreatitis, which is a risk factor for PDAC, lesions. PRDM14 staining in chronic pancreatitis was as high as that in PDAC and cancer adjacent tissues. We induced pancreatitis in mouse models by cerulein injection, and observed that PRDM14 expression increased in chronic pancreatitis models but not in control or acute pancreatitis mice. Moreover, cerulein treatment increased PRDM14 expression in PK‐1 and AsPC‐1 pancreatic cancer cell lines. Our results suggest that inflammation increases the expression of PRDM14, which regulates cancer stem‐like phenotypes, and this occurs prior to PDAC initiation and progression.
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Affiliation(s)
- Chiharu Moriya
- Center for Antibody and Vaccine Therapy Research Hospital Institute of Medical Science The University of Tokyo Japan
| | - Kohzoh Imai
- Research Hospital Institute of Medical Science The University of Tokyo Japan
| | - Hiroaki Taniguchi
- Center for Antibody and Vaccine Therapy Research Hospital Institute of Medical Science The University of Tokyo Japan
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12
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Xu M, Chang HH, Jung X, Moro A, Chou CEN, King J, Hines OJ, Sinnett-Smith J, Rozengurt E, Eibl G. Deficiency in hormone-sensitive lipase accelerates the development of pancreatic cancer in conditional KrasG12D mice. BMC Cancer 2018; 18:797. [PMID: 30086728 PMCID: PMC6081906 DOI: 10.1186/s12885-018-4713-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 07/31/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Hormone sensitive lipase (HSL) is a neutral lipase that preferentially catalyzes the hydrolysis of diacylglycerol contributing to triacylglycerol breakdown in the adipose tissue. HSL has been implicated to play a role in tumor cachexia, a debilitating syndrome characterized by progressive loss of adipose tissue. Consequently, pharmacological inhibitors of HSL have been proposed for the treatment of cancer-associated cachexia. In the present study we used the conditional KrasG12D (KC) mouse model of pancreatic ductal adenocarcinoma (PDAC) with a deficiency in HSL to determine the impact of HSL suppression on the development of PDAC. METHODS KC;Hsl+/+ and KC;Hsl-/- mice were fed standard rodent chow for 20 weeks. At sacrifice, the incidence of PDAC was determined and inflammation in the mesenteric adipose tissue and pancreas was assessed histologically and by immunofluorescence. To determine statistical significance, ANOVA and two-tailed Student's t-tests were performed. To compare PDAC incidence, a two-sided Fisher's exact test was used. RESULTS Compared to KC;Hsl+/+ mice, KC;Hsl-/- mice gained similar weight and displayed adipose tissue and pancreatic inflammation. In addition, KC;Hsl-/- mice had reduced levels of plasma insulin and leptin. Importantly, the increased adipose tissue and pancreatic inflammation was associated with a significant increase in PDAC incidence in KC;Hsl-/- mice. CONCLUSIONS HSL deficiency is associated with adipose tissue and pancreatic inflammation and accelerates PDAC development in the KC mouse model.
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Affiliation(s)
- Mu Xu
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
| | - Hui-Hua Chang
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
- CURE: Digestive Diseases Research Center, University of California at Los Angeles, Los Angeles, USA
| | - Xiaoman Jung
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
| | - Aune Moro
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
| | - Caroline Ei Ne Chou
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
| | - Jonathan King
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
| | - O. Joe Hines
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
| | - James Sinnett-Smith
- Departments of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA USA
- CURE: Digestive Diseases Research Center, University of California at Los Angeles, Los Angeles, USA
| | - Enrique Rozengurt
- Departments of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA USA
- CURE: Digestive Diseases Research Center, University of California at Los Angeles, Los Angeles, USA
| | - Guido Eibl
- Departments of Surgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, CHS 72-236, Los Angeles, CA 90095 USA
- CURE: Digestive Diseases Research Center, University of California at Los Angeles, Los Angeles, USA
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13
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Kaur K, Chang HH, Topchyan P, Cook JM, Barkhordarian A, Eibl G, Jewett A. Deficiencies in Natural Killer Cell Numbers, Expansion, and Function at the Pre-Neoplastic Stage of Pancreatic Cancer by KRAS Mutation in the Pancreas of Obese Mice. Front Immunol 2018; 9:1229. [PMID: 29977235 PMCID: PMC6021953 DOI: 10.3389/fimmu.2018.01229] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 05/16/2018] [Indexed: 12/18/2022] Open
Abstract
The combined/synergistic effect of genetic mutation of KRAS in the pancreas and obesity, a life-style factor on suppression of natural killer (NK) cells at the pre-neoplastic stage of pancreatic cancer has not been investigated and is the subject of this report. Obese mice with KRAS (KC) mutation in the pancreas fed with high-fat calorie diet (HFCD) exhibit severe deficiencies in the NK cell expansion and function at the pre-neoplastic stage of pancreatic cancer. Decreased NK cell-mediated cytotoxicity is observed in the peripheral blood, spleen, pancreas, and peri-pancreatic adipose tissue in obese KC mice, whereas in bone marrow an increased NK cell-mediated cytotoxicity is observed when compared to lean WT mice fed with control diet (CD). Obese KC mice on HFCD demonstrated the least ability to expand NK cells or induce NK cell-mediated cytotoxicity when compared to the other groups of mice. Indeed, the following profile WT/CD > WT/HFCD > KC/CD > KC/HFCD was seen for the ability to expand NK cells or mediate cytotoxicity among four groups of mice in spleen, peripheral blood, pancreas, and peri-pancreatic adipose tissue. Sorted NK cells from the splenocytes of four groups of mice also exhibited the same profiles for the cytotoxicity as the unsorted splenocytes, and a decreased IFN-γ secretion could be seen in cultures of NK cells from KC mice fed with either CD or HFCD. Cultures of NK cells with autologous monocytes from obese KC mice fed with HFCD exhibited decreased cytotoxicity and IFN-γ secretion, whereas cultures of allogeneic NK cells from WT mice fed with CD with osteoclasts of obese mice fed with HFCD demonstrated decreased cytotoxicity but augmented IFN-γ secretion. Increased IL-6 along with decreased IFN-γ and cell-mediated cytotoxicity by the NK cells, within NK-adipose tissue of KC/HFCD mice, may provide safe microenvironment for the expansion of pancreatic tumors.
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Affiliation(s)
- Kawaljit Kaur
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Paytsar Topchyan
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jessica Morgan Cook
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Andre Barkhordarian
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Anahid Jewett
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Tumor Immunology, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,UCLA Jonsson Comprehensive Cancer Center, Los Angeles, CA, United States
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14
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Chu M, Wang T, Sun A, Chen Y. Nimesulide inhibits proliferation and induces apoptosis of pancreatic cancer cells by enhancing expression of PTEN. Exp Ther Med 2018; 16:370-376. [PMID: 29896263 DOI: 10.3892/etm.2018.6191] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 01/05/2018] [Indexed: 12/24/2022] Open
Abstract
Pancreatic cancer is the fourth leading cause of cancer-associated cases of mortality worldwide. Prostaglandin-endoperoxide synthase 2 (COX-2) is considered a therapeutic target for prevention of pancreatic cancer. Nimesulide, a selective COX-2 inhibitor, can induce cell apoptosis, resulting in an anti-cancer effect. However, the mechanism underlying this effect remains to be elucidated. The present study aimed to evaluate the effects of nimesulide on proliferation of PANC-1 cells using an MTT assay. Apoptosis was evaluated by DNA laddering and Annexin V-fluorescein isothiocyanate/propidium iodide-stained flow cytometry. Furthermore, western blot analysis was used to elucidate the mechanism underlying nimesulide treatment in PANC-1 cells. It was determined that proliferation of PANC-1 cells was inhibited by nimesulide in a dose-dependent manner. Nimesulide promoted apoptosis of PANC-1 cells. Western blot analysis demonstrated that nimesulide increased expression of cleaved caspase-3 and apoptosis regulator Bax (Bcl-2 associated protein X), and decreased the expression of pro-caspase-3 and apoptosis regulator Bcl-2 (B-cell lymphoma 2). Furthermore, nimesulide enhanced expression of phosphatase and tensin homolog (PTEN), and decreased the expression level of COX-2 and vascular endothelial growth factor. In summary, the results of the present study demonstrated that nimesulide could induce apoptosis and inhibit growth of PANC-1 cells by enhancing the expression of PTEN, which indicates the potential of nimesulide to prevent tumor angiogenesis.
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Affiliation(s)
- Meifen Chu
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, Zhejiang 310053, P.R. China
| | - Tongtong Wang
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Aihua Sun
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, Zhejiang 310053, P.R. China
| | - Yu Chen
- College of Laboratory Medicine, Hangzhou Medical College, Hangzhou, Zhejiang 310053, P.R. China
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15
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Metformin Decreases the Incidence of Pancreatic Ductal Adenocarcinoma Promoted by Diet-induced Obesity in the Conditional KrasG12D Mouse Model. Sci Rep 2018; 8:5899. [PMID: 29651002 PMCID: PMC5897574 DOI: 10.1038/s41598-018-24337-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/27/2018] [Indexed: 12/14/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a particularly deadly disease. Chronic conditions, including obesity and type-2 diabetes are risk factors, thus making PDAC amenable to preventive strategies. We aimed to characterize the chemo-preventive effects of metformin, a widely used anti-diabetic drug, on PDAC development using the KrasG12D mouse model subjected to a diet high in fats and calories (HFCD). LSL-KrasG12D/+;p48-Cre (KC) mice were given control diet (CD), HFCD, or HFCD with 5 mg/ml metformin in drinking water for 3 or 9 months. After 3 months, metformin prevented HFCD-induced weight gain, hepatic steatosis, depletion of intact acini, formation of advanced PanIN lesions, and stimulation of ERK and mTORC1 in pancreas. In addition to reversing hepatic and pancreatic histopathology, metformin normalized HFCD-induced hyperinsulinemia and hyperleptinemia among the 9-month cohort. Importantly, the HFCD-increased PDAC incidence was completely abrogated by metformin (p < 0.01). The obesogenic diet also induced a marked increase in the expression of TAZ in pancreas, an effect abrogated by metformin. In conclusion, administration of metformin improved the metabolic profile and eliminated the promoting effects of diet-induced obesity on PDAC formation in KC mice. Given the established safety profile of metformin, our findings have a strong translational potential for novel chemo-preventive strategies for PDAC.
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16
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Waldmann J, Fendrich V, Reichert M, Hecker A, Bartsch DK, Padberg W, Holler JP. Expression of neuropeptide Y and its receptors Y1 and Y2 in pancreatic intraepithelial neoplasia and invasive pancreatic cancer in a transgenic mouse model and human samples of pancreatic cancer. J Surg Res 2018; 223:230-236. [DOI: 10.1016/j.jss.2017.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 10/02/2017] [Accepted: 11/03/2017] [Indexed: 12/20/2022]
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17
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Chen CC, Chen LL, Li CP, Hsu YT, Jiang SS, Fan CS, Chua KV, Huang SX, Shyr YM, Chen LT, Huang TS. Myeloid-derived macrophages and secreted HSP90α induce pancreatic ductal adenocarcinoma development. Oncoimmunology 2018; 7:e1424612. [PMID: 29721383 PMCID: PMC5927518 DOI: 10.1080/2162402x.2018.1424612] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 12/31/2017] [Accepted: 01/03/2018] [Indexed: 12/23/2022] Open
Abstract
We detected a significant elevation of serum HSP90α levels in pancreatitis patients and even more in pancreatic ductal adenocarcinoma (PDAC) patients. However, there was no significant difference in the serum HSP90α levels between patients with early-stage and late-stage PDAC. To study whether elevation of serum HSP90α levels occurred early during PDAC development, we used LSL-KrasG12D/Pdx1-Cre transgenic mice as a studying model. Elevated serum HSP90α levels were detected before PDAC formation and an extracellular HSP90α (eHSP90α) inhibitor effectively prevented PDAC development. Both serum HSP90α level and pancreatic lesion were suppressed when the mice were administered a CD11b-antagonizing antibody, suggesting that CD11b+-myeloid cells were associated with eHSP90α levels and pancreatic carcinogenesis. Consistently, in CD11b-DTR-EGFP transgenic mouse model with CD11b+-myeloid cells depletion, serum HSP90α levels were suppressed and Panc-02 cell grafts failed to develop tumors. Macrophages and granulocytes are two common tissue-infiltrating CD11b+-myeloid cells. Duplex in situ hybridization assays suggested that macrophages were predominant HSP90α-expressing CD11b+-myeloid cells during PDAC development. Immunohistochemical and immunohistofluorescent staining results revealed that HSP90α-expressing cells included not only macrophages but also pancreatic ductal epithelial (PDE) cells. Cell culture studies also indicated that eHSP90α could be produced by macrophages and macrophage-stimulated PDE cells. Macrophages not only secreted significant amount of HSP90α, but also secreted interleukin-6 and interleukin-8 to induce a JAK2−STAT3 signaling axis in PDE cells, stimulating them to express and secrete HSP90α. eHSP90α further promoted cellular epithelial-mesenchymal transition, migration, and invasion in PDE cells. Besides myeloid cells, eHSP90α can be potentially taken as a target to suppress PDAC pathogenesis.
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Affiliation(s)
- Chia-Chi Chen
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Li-Li Chen
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Chung-Pin Li
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, and School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Yu-Ting Hsu
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Shih-Sheng Jiang
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Chi-Shuan Fan
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Kee Voon Chua
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Sheng-Xiang Huang
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Yi-Ming Shyr
- Division of General Surgery, Department of Surgery, Taipei Veterans General Hospital, and School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Li-Tzong Chen
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
| | - Tze-Sing Huang
- National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan.,Department of Biochemistry, School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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18
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Kaur K, Chang HH, Cook J, Eibl G, Jewett A. Suppression of Gingival NK Cells in Precancerous and Cancerous Stages of Pancreatic Cancer in KC and BLT-Humanized Mice. Front Immunol 2017; 8:1606. [PMID: 29255459 PMCID: PMC5723011 DOI: 10.3389/fimmu.2017.01606] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/07/2017] [Indexed: 12/12/2022] Open
Abstract
The aim of our studies is to determine the dynamics of natural killer (NK) cell modulation in gingivae in precancerous and cancerous stages of pancreatic and oral cancers in P48+/Cre;LSL-KRASG12D (KC) mice carrying a pancreas-specific oncogenic Kras mutation and BLT-humanized mice. Wild type and KC mice fed with control diet (CD) or high-fat calorie diet (HFCD), and the pancreatic and oral tumor-bearing humanized BLT (hu-BLT) mice were used to determine precancerous and cancer induced changes in numbers and function of gingival NK cells. Increased numbers of PanIN lesions and the greatest score of inflammation in pancreas of KC mice fed with CD and HFCD co-related with significant decline in percentages of circulating and gingival NK cells, lack of DX5+ NK expansion and increased secretion of IFN-γ and IL-6 after culture. At the malignant stage of pancreatic cancer, hu-BLT tumor-bearing mice had the lowest secretion of IFN-γ from cells dissociated from the gingival tissues as compared to those from non-tumor-bearing mice. Injection of NK cells into tumor-bearing mice increased IFN-γ secretion, and the secretion was similar or higher than those obtained by gingival cells from non-tumor-bearing hu-BLT control mice. The highest increase in IFN-γ secretion was observed when tumor-bearing mice were fed with AJ2 probiotic bacteria and injected with the NK cells. Along with an increase in secretion of IFN-γ, injection of NK cells in the presence and absence of feeding with AJ2 in pancreatic tumor-bearing mice increased percentages of CD45+ and CD3+ T cells in oral gingival cells. Similar results were observed with oral tumors. In conclusion, these results indicated that oral cavity may mirror systemic disease and provide a rationale for why cancer patients may be prone to suffer from diverse oral pathologies.
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Affiliation(s)
- Kawaljit Kaur
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jessica Cook
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Anahid Jewett
- Division of Oral Biology and Oral Medicine, School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Tumor Immunology, UCLA School of Dentistry and Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,The Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA, United States
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19
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Veite-Schmahl MJ, Rivers AC, Regan DP, Kennedy MA. The Mouse Model of Pancreatic Cancer Atlas (MMPCA) for classification of pancreatic cancer lesions: A large histological investigation of the Ptf1aCre/+;LSL-KrasG12D/+ transgenic mouse model of pancreatic cancer. PLoS One 2017; 12:e0187552. [PMID: 29121082 PMCID: PMC5679567 DOI: 10.1371/journal.pone.0187552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 10/20/2017] [Indexed: 12/18/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the leading forms of cancer related deaths in the United States. With limited treatment options and unreliable diagnostic methods, long-term survival rates following a diagnosis of pancreatic cancer remain poor. Pancreatic intraepithelial neoplasia (PanIN) are precancerous lesions that precede progression towards PDAC. PanIN occur in increasing complexity as the disease progresses and the description of PanIN plays a critical role in describing, staging and diagnosing PDAC. Inconsistencies in PanIN classifications exist even amongst leading pathologists. This has led to debate and confusion among researchers and pathologists involved in pancreatic cancer research, diagnosis and treatment. We have sought to initiate a discussion with leading pathologists with a goal of increasing consensus in the interpretation of PanIN and associated structures within the precancerous pancreas. Toward achieving this goal, we are in the process of conducting an extensive study of over 1000 male and female pancreata in varying stages of PanIN progression isolated from the Ptf1aCre/+;LSL-KrasG12D/+ transgenic mouse model of pancreatic cancer. Using this extensive database, we have established the Mouse Model of Pancreatic Cancer Atlas (MMPCA) to serve as a platform for meaningful and interactive discussion among researchers and pathologists who study pancreatic disease. We hope that the MMPCA will be an effective tool for promoting a more consistent and accurate consensus of PanIN classifications in the future.
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Affiliation(s)
| | - Adam C. Rivers
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio, United States of America
| | - Daniel P. Regan
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio, United States of America
| | - Michael A. Kennedy
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio, United States of America
- * E-mail:
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20
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Eibl G, Rozengurt E. KRAS, YAP, and obesity in pancreatic cancer: A signaling network with multiple loops. Semin Cancer Biol 2017; 54:50-62. [PMID: 29079305 DOI: 10.1016/j.semcancer.2017.10.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 10/22/2017] [Indexed: 02/08/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) continues to be a lethal disease with no efficacious treatment modalities. The incidence of PDAC is expected to increase, at least partially because of the obesity epidemic. Increased efforts to prevent or intercept this disease are clearly needed. Mutations in KRAS are initiating events in pancreatic carcinogenesis supported by genetically engineered mouse models of the disease. However, oncogenic KRAS is not entirely sufficient for the development of fully invasive PDAC. Additional genetic mutations and/or environmental, nutritional, and metabolic stressors, e.g. inflammation and obesity, are required for efficient PDAC formation with activation of KRAS downstream effectors. Multiple factors "upstream" of KRAS associated with obesity, including insulin resistance, inflammation, changes in gut microbiota and GI peptides, can enhance/modulate downstream signals. Multiple signaling networks and feedback loops "downstream" of KRAS have been described that respond to obesogenic diets. We propose that KRAS mutations potentiate a signaling network that is promoted by environmental factors. Specifically, we envisage that KRAS mutations increase the intensity and duration of the growth-promoting signaling network. As the transcriptional activator YAP plays a critical role in the network, we conclude that the rationale for targeting the network (at different points), e.g. with FDA approved drugs such as statins and metformin, is therefore compelling.
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Affiliation(s)
- Guido Eibl
- Departments of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States; CURE: Digestive Diseases Research Center, University of California at Los Angeles, Los Angeles, CA, United States.
| | - Enrique Rozengurt
- Departments of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States; CURE: Digestive Diseases Research Center, University of California at Los Angeles, Los Angeles, CA, United States
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21
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Chang HH, Moro A, Takakura K, Su HY, Mo A, Nakanishi M, Waldron RT, French SW, Dawson DW, Hines OJ, Li G, Go VLW, Sinnett-Smith J, Pandol SJ, Lugea A, Gukovskaya AS, Duff MO, Rosenberg DW, Rozengurt E, Eibl G. Incidence of pancreatic cancer is dramatically increased by a high fat, high calorie diet in KrasG12D mice. PLoS One 2017; 12:e0184455. [PMID: 28886117 PMCID: PMC5590955 DOI: 10.1371/journal.pone.0184455] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 08/24/2017] [Indexed: 12/12/2022] Open
Abstract
Epidemiologic data has linked obesity to a higher risk of pancreatic cancer, but the underlying mechanisms are poorly understood. To allow for detailed mechanistic studies in a relevant model mimicking diet-induced obesity and pancreatic cancer, a high-fat, high-calorie diet (HFCD) was given to P48+/Cre;LSL-KRASG12D (KC) mice carrying a pancreas-specific oncogenic Kras mutation. The mice were randomly allocated to a HFCD or control diet (CD). Cohorts were sacrificed at 3, 6, and 9 months and tissues were harvested for further analysis. Compared to CD-fed mice, HFCD-fed animals gained significantly more weight. Importantly, the cancer incidence was remarkably increased in HFCD-fed KC mice, particularly in male KC mice. In addition, KC mice fed the HFCD showed more extensive inflammation and fibrosis, and more advanced PanIN lesions in the pancreas, compared to age-matched CD-fed animals. Interestingly, we found that the HFCD reduced autophagic flux in PanIN lesions in KC mice. Further, exome sequencing of isolated murine PanIN lesions identified numerous genetic variants unique to the HFCD. These data underscore the role of sustained inflammation and dysregulated autophagy in diet-induced pancreatic cancer development and suggest that diet-induced genetic alterations may contribute to this process. Our findings provide a better understanding of the mechanisms underlying the obesity-cancer link in males and females, and will facilitate the development of interventions targeting obesity-associated pancreatic cancer.
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Affiliation(s)
- Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
| | - Aune Moro
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
| | - Kazuki Takakura
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
| | - Hsin-Yuan Su
- Pancreatic Research Group, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States of America
| | - Allen Mo
- Center for Molecular Oncology, UCONN Health, Farmington, CT, United States of America
| | - Masako Nakanishi
- Center for Molecular Oncology, UCONN Health, Farmington, CT, United States of America
| | - Richard T. Waldron
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
- Pancreatic Research Group, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States of America
| | - Samuel W. French
- Department of Pathology, Harbor-UCLA Medical Center, Torrance, CA, United States of America
- Southern California Research Center for ALPD and Cirrhosis, Department of Pathology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States of America
| | - David W. Dawson
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
| | - O. Joe Hines
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
| | - Gang Li
- Department of Biostatistics, School of Public Health at UCLA, Los Angeles, CA, United States of America
| | - Vay Liang W. Go
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
| | - James Sinnett-Smith
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
| | - Stephen J. Pandol
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
- Pancreatic Research Group, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States of America
| | - Aurelia Lugea
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
- Pancreatic Research Group, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States of America
| | - Anna S. Gukovskaya
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
| | - Michael O. Duff
- Department of Genetics and Genome Sciences, UCONN Health, Farmington, CT, United States of America
| | - Daniel W. Rosenberg
- Center for Molecular Oncology, UCONN Health, Farmington, CT, United States of America
| | - Enrique Rozengurt
- Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, CA, United States of America
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States of America
- * E-mail:
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22
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Grabocka E, Bar-Sagi D. Mutant KRAS Enhances Tumor Cell Fitness by Upregulating Stress Granules. Cell 2017; 167:1803-1813.e12. [PMID: 27984728 DOI: 10.1016/j.cell.2016.11.035] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 09/23/2016] [Accepted: 11/17/2016] [Indexed: 02/07/2023]
Abstract
There is growing evidence that stress-coping mechanisms represent tumor cell vulnerabilities that may function as therapeutically beneficial targets. Recent work has delineated an integrated stress adaptation mechanism that is characterized by the formation of cytoplasmic mRNA and protein foci, termed stress granules (SGs). Here, we demonstrate that SGs are markedly elevated in mutant KRAS cells following exposure to stress-inducing stimuli. The upregulation of SGs by mutant KRAS is dependent on the production of the signaling lipid molecule 15-deoxy-delta 12,14 prostaglandin J2 (15-d-PGJ2) and confers cytoprotection against stress stimuli and chemotherapeutic agents. The secretion of 15-d-PGJ2 by mutant KRAS cells is sufficient to enhance SG formation and stress resistance in cancer cells that are wild-type for KRAS. Our findings identify a mutant KRAS-dependent cell non-autonomous mechanism that may afford the establishment of a stress-resistant niche that encompasses different tumor subclones. These results should inform the design of strategies to eradicate tumor cell communities.
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Affiliation(s)
- Elda Grabocka
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY 10016, USA
| | - Dafna Bar-Sagi
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY 10016, USA.
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23
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Andersen DK, Korc M, Petersen GM, Eibl G, Li D, Rickels MR, Chari ST, Abbruzzese JL. Diabetes, Pancreatogenic Diabetes, and Pancreatic Cancer. Diabetes 2017; 66:1103-1110. [PMID: 28507210 PMCID: PMC5399609 DOI: 10.2337/db16-1477] [Citation(s) in RCA: 264] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/25/2017] [Indexed: 12/16/2022]
Abstract
The relationships between diabetes and pancreatic ductal adenocarcinoma (PDAC) are complex. Longstanding type 2 diabetes (T2DM) is a risk factor for pancreatic cancer, but increasing epidemiological data point to PDAC as also a cause of diabetes due to unknown mechanisms. New-onset diabetes is of particular interest to the oncology community as the differentiation of new-onset diabetes caused by PDAC as distinct from T2DM may allow for earlier diagnosis of PDAC. To address these relationships and raise awareness of the relationships between PDAC and diabetes, a symposium entitled Diabetes, Pancreatogenic Diabetes, and Pancreatic Cancer was held at the American Diabetes Association's 76th Scientific Sessions in June 2016. This article summarizes the data presented at that symposium, describing the current understanding of the interrelationships between diabetes, diabetes management, and pancreatic cancer, and identifies areas where additional research is needed.
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MESH Headings
- Blood Glucose/metabolism
- Carcinoma, Pancreatic Ductal/epidemiology
- Carcinoma, Pancreatic Ductal/genetics
- Carcinoma, Pancreatic Ductal/immunology
- Causality
- Diabetes Mellitus/classification
- Diabetes Mellitus/drug therapy
- Diabetes Mellitus/epidemiology
- Diabetes Mellitus/etiology
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/epidemiology
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Genetic Predisposition to Disease
- Humans
- Hypoglycemic Agents/therapeutic use
- Inflammation
- Obesity/epidemiology
- Obesity/immunology
- Pancreatic Neoplasms/epidemiology
- Pancreatic Neoplasms/genetics
- Pancreatic Neoplasms/immunology
- Pancreatitis, Chronic/complications
- Pancreatitis, Chronic/epidemiology
- Pancreatitis, Chronic/genetics
- Pancreatitis, Chronic/immunology
- Risk Factors
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Affiliation(s)
- Dana K Andersen
- Division of Digestive Diseases and Nutrition, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Murray Korc
- Division of Endocrinology, Department of Medicine, and Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, and Indiana University Melvin and Bren Simon Cancer Center and Pancreatic Cancer Signature Center, Indianapolis, IN
| | | | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Donghui Li
- Department of Gastrointestinal Medical Oncology, MD Anderson Cancer Center, Houston, TX
| | - Michael R Rickels
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Suresh T Chari
- Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN
| | - James L Abbruzzese
- Division of Medical Oncology, Department of Medicine, Duke University School of Medicine, Durham, NC
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24
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Schmidt A, Sinnett-Smith J, Young S, Chang HH, Hines OJ, Dawson DW, Rozengurt E, Eibl G. Direct growth-inhibitory effects of prostaglandin E2 in pancreatic cancer cells in vitro through an EP4/PKA-mediated mechanism. Surgery 2017; 161:1570-1578. [PMID: 28222855 DOI: 10.1016/j.surg.2016.12.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 12/09/2016] [Accepted: 12/22/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND There is strong evidence linking inflammation and the development of pancreatic ductal adenocarcinoma. Cyclooxygenase-2 (COX-2) and COX-2-derived PGE2 are overexpressed in human and murine pancreatic ductal adenocarcinoma. Several studies have demonstrated an important role of COX-2-derived PGE2 in tumor-stroma interactions; however, the direct growth effects of prostaglandin E2 (PGE2) on pancreatic ductal adenocarcinoma cells is less well defined. Our aim was to investigate the effects of PGE2 on pancreatic ductal adenocarcinoma cell growth and to characterize the underlying mechanisms. METHODS Human pancreatic ductal adenocarcinoma cell lines, Panc-1 and MIA PaCa-2, were treated with PGE2 in varying doses (0-10 μM). Effects on the phosphorylation of ERK1/2 were evaluated by Western blot. Colony formation was observed for cells treated with PGE2 for 11 days. DNA synthesis was determined by (3H)-thymidine incorporation assay. Gene expression of E-type prostaglandin (EP)2/EP4 receptors and their correlation with survival in patients with pancreatic ductal adenocarcinoma were assessed using the RNA-Seq data set from The Cancer Genome Atlas Research Network. RESULTS PGE2 decreased the size and number of colonies in Panc-1 but not MIA PaCa-2 cells. In the Panc-1 cells, PGE2 activated PKA/CREB and decreased phosphorylation of ERK1/2, which was reversed by an EP4 receptor antagonist, while an EP2 receptor antagonist had no effect. In contrast, in MIA PaCa-2 cells, PGE2 had no effect on ERK1/2 phosphorylation. Treatment of both Panc-1 and MIA PaCa-2 cells with forskolin/IBMX decreased ERK1/2 phosphorylation. Finally, PGE2 decreased DNA synthesis only in Panc-1 cells, which was reversed by an EP4 receptor antagonist. In human pancreatic ductal adenocarcinoma, high EP2 and low EP4 gene expression was correlated to worse median overall survival (15.6 vs 20.8 months, log-rank P = .017). CONCLUSION Our study provides evidence that PGE2 can inhibit directly pancreatic ductal adenocarcinoma cell growth through an EP4-mediated mechanism. Together with our gene expression and survival analysis, this observation suggests a protective role of EP4 receptors in human pancreatic ductal adenocarcinoma that expresses E-type prostaglandin receptors.
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Affiliation(s)
- Andrea Schmidt
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA; Klinik für Allgemein- und Viszeralchirurgie, Universitätsklinikum Freiburg, Freiburg, Germany
| | - James Sinnett-Smith
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Steven Young
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - O Joe Hines
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - David W Dawson
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Enrique Rozengurt
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA.
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25
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K-Ras and cyclooxygenase-2 coactivation augments intraductal papillary mucinous neoplasm and Notch1 mimicking human pancreas lesions. Sci Rep 2016; 6:29455. [PMID: 27381829 PMCID: PMC4933934 DOI: 10.1038/srep29455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 06/17/2016] [Indexed: 12/15/2022] Open
Abstract
Mutational activation of K-Ras is an initiating event of pancreatic ductal adenocarcinomas (PDAC) that may develop either from pancreatic intraepithelial neoplasia (PanIN) or intraductal papillary mucinous neoplasms (IPMN). Cyclooxygenase-2 (COX-2)-derived prostaglandin E2 (PGE2) is causally related to pancreatic carcinogenesis. Here, we deciphered the impact of COX-2, a key modulator of inflammation, in concert with active mutant K-RasG12D on tumor burden and gene expression signature using compound mutant mouse lines. Concomitant activation of COX-2 and K-RasG12D accelerated the progression of pancreatic intraepithelial lesions predominantly with a cystic papillary phenotype resembling human IPMN. Transcriptomes derived from laser capture microdissected preneoplastic lesions of single and compound mutants revealed a signature that was significantly enriched in Notch1 signaling components. In vitro, Notch1 signaling was COX-2-dependent. In line with these findings, human IPMN stratified into intestinal, gastric and pancreatobillary types displayed Notch1 immunosignals with high prevalence, especially in the gastric lesions. In conclusion, a yet unknown link between activated Ras, protumorigenic COX-2 and Notch1 in IPMN onset was unraveled.
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26
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Robust Early Inflammation of the Peripancreatic Visceral Adipose Tissue During Diet-Induced Obesity in the KrasG12D Model of Pancreatic Cancer. Pancreas 2016; 45:458-65. [PMID: 26495779 PMCID: PMC4854638 DOI: 10.1097/mpa.0000000000000497] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Obesity increases the incidence of multiple types of cancer. Our previous work has shown that a high-fat, high-calorie diet (HFCD) leads to visceral obesity, pancreatic inflammation, and accelerated pancreatic neoplasia in KrasG12D (KC) mice. In this study, we aimed to investigate the effects of an HFCD on visceral adipose inflammation with emphasis on potential differences between distinct visceral adipose depots. METHODS We examined the weight and visceral obesity in both wild-type and KC mice on either control diet (CD) or HFCD. After 3 months, mice were killed for histological examination. Multiplex assays were also performed to obtain cytokine profiles between different adipose depots. RESULTS Both wild-type and KC mice on an HFCD exhibited significantly increased inflammation in the visceral adipose tissue, particularly in the peripancreatic fat (PPF), compared with animals on a CD. This was associated with significantly increased inflammation in the pancreas. Cytokine profiles were different between visceral adipose depots and between mice on the HFCD and CD. CONCLUSIONS Our results clearly demonstrate that an HFCD leads to obesity and inflammation in the visceral adipose tissue, particularly the PPF. These data suggest that obesity-associated inflammation in PPF may accelerate pancreatic neoplasia in KC mice.
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27
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Polvani S, Tarocchi M, Tempesti S, Bencini L, Galli A. Peroxisome proliferator activated receptors at the crossroad of obesity, diabetes, and pancreatic cancer. World J Gastroenterol 2016; 22:2441-2459. [PMID: 26937133 PMCID: PMC4768191 DOI: 10.3748/wjg.v22.i8.2441] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 12/17/2015] [Accepted: 01/11/2016] [Indexed: 02/06/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is the fourth cause of cancer death with an overall survival of 5% at five years. The development of PDAC is characteristically associated to the accumulation of distinctive genetic mutations and is preceded by the exposure to several risk factors. Epidemiology has demonstrated that PDAC risk factors may be non-modifiable risks (sex, age, presence of genetic mutations, ethnicity) and modifiable and co-morbidity factors related to the specific habits and lifestyle. Recently it has become evident that obesity and diabetes are two important modifiable risk factors for PDAC. Obesity and diabetes are complex systemic and intertwined diseases and, over the years, experimental evidence indicate that insulin-resistance, alteration of adipokines, especially leptin and adiponectin, oxidative stress and inflammation may play a role in PDAC. Peroxisome proliferator activated receptor-γ (PPARγ) is a nuclear receptor transcription factor that is implicated in the regulation of metabolism, differentiation and inflammation. PPARγ is a key regulator of adipocytes differentiation, regulates insulin and adipokines production and secretion, may modulate inflammation, and it is implicated in PDAC. PPARγ agonists are used in the treatment of diabetes and oxidative stress-associated diseases and have been evaluated for the treatment of PDAC. PPARγ is at the cross-road of diabetes, obesity, and PDAC and it is an interesting target to pharmacologically prevent PDAC in obese and diabetic patients.
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28
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Qiu W, Tang SM, Lee S, Turk AT, Sireci AN, Qiu A, Rose C, Xie C, Kitajewski J, Wen HJ, Crawford HC, Sims PA, Hruban RH, Remotti HE, Su GH. Loss of Activin Receptor Type 1B Accelerates Development of Intraductal Papillary Mucinous Neoplasms in Mice With Activated KRAS. Gastroenterology 2016; 150:218-228.e12. [PMID: 26408346 PMCID: PMC4860725 DOI: 10.1053/j.gastro.2015.09.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/27/2015] [Accepted: 09/16/2015] [Indexed: 12/29/2022]
Abstract
BACKGROUND & AIMS Activin, a member of the transforming growth factor-β (TGFB) family, might be involved in pancreatic tumorigenesis, similar to other members of the TGFB family. Human pancreatic ductal adenocarcinomas contain somatic mutations in the activin A receptor type IB (ACVR1B) gene, indicating that ACVR1B could be a suppressor of pancreatic tumorigenesis. METHODS We disrupted Acvr1b specifically in pancreata of mice (Acvr1b(flox/flox);Pdx1-Cre mice) and crossed them with LSL-KRAS(G12D) mice, which express an activated form of KRAS and develop spontaneous pancreatic tumors. The resulting Acvr1b(flox/flox);LSL-KRAS(G12D);Pdx1-Cre mice were monitored; pancreatic tissues were collected and analyzed by histology and immunohistochemical analyses. We also analyzed p16(flox/flox);LSL-Kras(G12D);Pdx1-Cre mice and Cre-negative littermates (controls). Genomic DNA, total RNA, and protein were isolated from mouse tissues and primary pancreatic tumor cell lines and analyzed by reverse-transcription polymerase chain reaction, sequencing, and immunoblot analyses. Human intraductal papillary mucinous neoplasm (IPMN) specimens were analyzed by immunohistochemistry. RESULTS Loss of ACVR1B from pancreata of mice increased the proliferation of pancreatic epithelial cells, led to formation of acinar to ductal metaplasia, and induced focal inflammatory changes compared with control mice. Disruption of Acvr1b in LSL-KRAS(G12D);Pdx1-Cre mice accelerated the growth of pancreatic IPMNs compared with LSL-KRAS(G12D);Pdx1-Cre mice, but did not alter growth of pancreatic intraepithelial neoplasias. We associated perinuclear localization of the activated NOTCH4 intracellular domain to the apical cytoplasm of neoplastic cells with the expansion of IPMN lesions in Acvr1b(flox/flox);LSL-KRAS(G12D);Pdx1-Cre mice. Loss of the gene that encodes p16 (Cdkn2a) was required for progression of IPMNs to pancreatic ductal adenocarcinomas in Acvr1b(flox/flox);LSL-Kras(G12D);Pdx1-Cre mice. We also observed progressive loss of p16 in human IPMNs of increasing grades. CONCLUSIONS Loss of ACVR1B accelerates growth of mutant KRAS-induced pancreatic IPMNs in mice; this process appears to involve NOTCH4 and loss of p16. ACVR1B suppresses early stages of pancreatic tumorigenesis; the activin signaling pathway therefore might be a therapeutic target for pancreatic cancer.
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Affiliation(s)
- Wanglong Qiu
- The Department of Pathology, Columbia University Medical Center, New York, NY 10032,Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032
| | - Sophia M. Tang
- Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032
| | - Sohyae Lee
- Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032
| | - Andrew T. Turk
- The Department of Pathology, Columbia University Medical Center, New York, NY 10032
| | - Anthony N. Sireci
- The Department of Pathology, Columbia University Medical Center, New York, NY 10032
| | - Anne Qiu
- Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032
| | | | - Chuangao Xie
- Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032
| | - Jan Kitajewski
- Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, NY 10032
| | - Hui-Ju Wen
- Department of Cancer Biology, Mayo Clinic Cancer Center, Jacksonville, FL
| | - Howard C. Crawford
- Department of Cancer Biology, Mayo Clinic Cancer Center, Jacksonville, FL
| | - Peter A. Sims
- Department of Systems Biology, Columbia University Medical Center, New York, NY 10032
| | - Ralph H. Hruban
- The Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, MD 21205
| | - Helen E. Remotti
- The Department of Pathology, Columbia University Medical Center, New York, NY 10032
| | - Gloria H. Su
- The Department of Pathology, Columbia University Medical Center, New York, NY 10032,Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY 10032,Department of Otolaryngology and Head and Neck Surgery, Columbia University Medical Center, New York, NY 10032
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29
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Rao CV, Janakiram NB, Madka V, Devarkonda V, Brewer M, Biddick L, Lightfoot S, Steele VE, Mohammed A. Simultaneous targeting of 5-LOX-COX and EGFR blocks progression of pancreatic ductal adenocarcinoma. Oncotarget 2015; 6:33290-305. [PMID: 26429877 PMCID: PMC4741766 DOI: 10.18632/oncotarget.5396] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 09/16/2015] [Indexed: 02/06/2023] Open
Abstract
Cyclooxygenase-2 (COX-2), 5-Lipoxygenase (5-LOX), and epidermal growth factor receptor (EGRF) are over-expressed in human pancreatic ductal adenocarcinoma (PDAC). Using next-generation sequencing (NGS) analysis, we show significant increase in COX-2, 5-LOX, and EGFR expression during PDAC progression. Targeting complementary pathways will achieve better treatment efficacy than a single agent high-dose strategy that could increase risk of side effects and tumor resistance. To target COX-2, 5-LOX, and EGFR simultaneously, we tested effects of licofelone (dual 5-LOX-COX inhibitor), and gefitinib (EGFR inhibitor), individually and in combination, on pancreatic intraepithelial neoplasms (PanINs) and their progression to PDAC using genetically engineered mice. Individually, licofelone (L) and gefitinib (G) significantly inhibited incidence of PDAC in male (72% L, 90% G, p < 0.0001) and female (90% L, 85% G, p < 0.0001) mice. The combination drug treatment produced complete inhibition of PDAC in both genders. Pancreata of mice receiving combination treatment showed significantly fewer Dclk1-positive cancer stem-like cells, inhibition of COX-2, 5-LOX, PCNA, EGFR and β-catenin expression (p < 0.05-0.0002), increased p21 expression. Significant changes in tumor immune responses and desmoplastic reaction was observed by NGS analysis in combination treatment (p < 0.05). In summary, early simultaneous targeting of 5-LOX-COX- and EGFR pathways may provide additive inhibitory effects leading to complete suppression of PDAC.
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Affiliation(s)
- Chinthalapally V. Rao
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Naveena B. Janakiram
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Venkateshwar Madka
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Vishal Devarkonda
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Misty Brewer
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Laura Biddick
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Stan Lightfoot
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Vernon E. Steele
- Division of Cancer Prevention, Chemopreventive Agent Development Research Group, National Cancer Institute, Bethesda, MD, USA
| | - Altaf Mohammed
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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30
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Chang HH, Young SH, Sinnett-Smith J, Chou CEN, Moro A, Hertzer KM, Hines OJ, Rozengurt E, Eibl G. Prostaglandin E2 activates the mTORC1 pathway through an EP4/cAMP/PKA- and EP1/Ca2+-mediated mechanism in the human pancreatic carcinoma cell line PANC-1. Am J Physiol Cell Physiol 2015; 309:C639-49. [PMID: 26310818 DOI: 10.1152/ajpcell.00417.2014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 08/14/2015] [Indexed: 02/07/2023]
Abstract
Obesity, a known risk factor for pancreatic cancer, is associated with inflammation and insulin resistance. Proinflammatory prostaglandin E2 (PGE2) and elevated insulin-like growth factor type 1 (IGF-1), related to insulin resistance, are shown to play critical roles in pancreatic cancer progression. We aimed to explore a potential cross talk between PGE2 signaling and the IGF-1/Akt/mammalian target of rapamycin complex 1 (mTORC1) pathway in pancreatic cancer, which may be a key to unraveling the obesity-cancer link. In PANC-1 human pancreatic cancer cells, we showed that PGE2 stimulated mTORC1 activity independently of Akt, as evaluated by downstream signaling events. Subsequently, using pharmacological and genetic approaches, we demonstrated that PGE2-induced mTORC1 activation is mediated by the EP4/cAMP/PKA pathway, as well as an EP1/Ca(2+)-dependent pathway. The cooperative roles of the two pathways were supported by the maximal inhibition achieved with the combined pharmacological blockade, and the coexistence of highly expressed EP1 (mediating the Ca(2+) response) and EP2 or EP4 (mediating the cAMP/PKA pathway) in PANC-1 cells and in the prostate cancer line PC-3, which also robustly exhibited PGE2-induced mTORC1 activation, as identified from a screen in various cancer cell lines. Importantly, we showed a reinforcing interaction between PGE2 and IGF-1 on mTORC1 signaling, with an increase in IL-23 production as a cellular outcome. Our data reveal a previously unrecognized mechanism of PGE2-stimulated mTORC1 activation mediated by EP4/cAMP/PKA and EP1/Ca(2+) signaling, which may be of great importance in elucidating the promoting effects of obesity in pancreatic cancer. Ultimately, a precise understanding of these molecular links may provide novel targets for efficacious interventions devoid of adverse effects.
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Affiliation(s)
- Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California; and
| | - Steven H Young
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - James Sinnett-Smith
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Caroline Ei Ne Chou
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California; and
| | - Aune Moro
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California; and
| | - Kathleen M Hertzer
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California; and
| | - Oscar Joe Hines
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California; and
| | - Enrique Rozengurt
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California; and
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31
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Stark AP, Chang HH, Jung X, Moro A, Hertzer K, Xu M, Schmidt A, Hines OJ, Eibl G. E-cadherin expression in obesity-associated, Kras-initiated pancreatic ductal adenocarcinoma in mice. Surgery 2015; 158:1564-72. [PMID: 26297056 DOI: 10.1016/j.surg.2015.07.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 07/06/2015] [Accepted: 07/10/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND The epithelial-mesenchymal transition (EMT) is critical in the development of invasive epithelial malignancies. EMT is accelerated by inflammation and results in decreased E-cadherin expression. Diet-induced obesity is an inflammatory state that accelerates pancreatic carcinogenesis; its effect on EMT and E-cadherin expression in the development of pancreatic ductal adenocarcinoma is unclear. METHODS Conditional Kras(G12D) mice were fed a control diet or a high-fat, high-calorie diet for 3 or 9 months (n = 10 each). Immunohistochemistry with anti-E-cadherin antibody was performed. E-cadherin expression was characterized by staining intensity, location, and proportion of positive cells. In vitro expression of E-cadherin and Slug in primary pancreatic intraepithelial neoplasia (PanIN) and cancer cells was determined by Western blot. RESULTS The HFCD led to increased weight gain in both 3- (15.8 vs 5.6 g, P < .001) and 9-month (19.8 vs 12.9 g, P = .007) mice. No differences in E-cadherin expression among various stages of preinvasive PanIN lesions were found--regardless of age or diet. In invasive cancer, E-cadherin expression was aberrant, with loss of membranous staining and prominent cytoplasmic staining, associated with strong, cytoplasmic expression of β-catenin. In vitro expression of E-cadherin was greatest in primary PanIN cells, accompanied by absent Slug expression. Cancer cell lines demonstrated significantly decreased E-cadherin expression in the presence of upregulated Slug. CONCLUSION Despite increased pancreatic inflammation and accelerated carcinogenesis, the high-fat, high-calorie diet did not induce changes in E-cadherin expression in PanIN lesions of all stages. Invasive lesions demonstrated aberrant cytoplasmic E-cadherin staining. Loss of normal membranous localization may reflect a functional loss of E-cadherin.
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MESH Headings
- Adenocarcinoma/genetics
- Adenocarcinoma/metabolism
- Adenocarcinoma/pathology
- Animals
- Cadherins/genetics
- Cadherins/metabolism
- Carcinoma, Pancreatic Ductal/genetics
- Carcinoma, Pancreatic Ductal/metabolism
- Carcinoma, Pancreatic Ductal/pathology
- Cell Line, Tumor
- Cells, Cultured
- Diet, High-Fat/adverse effects
- Disease Models, Animal
- Energy Intake
- Epithelial-Mesenchymal Transition
- Gene Expression Regulation, Neoplastic/genetics
- Gene Expression Regulation, Neoplastic/physiology
- In Vitro Techniques
- Mice
- Mice, Mutant Strains
- Mutation/genetics
- Neoplasm Staging
- Obesity/complications
- Pancreatic Neoplasms/genetics
- Pancreatic Neoplasms/metabolism
- Pancreatic Neoplasms/pathology
- Proto-Oncogene Proteins p21(ras)/genetics
- Proto-Oncogene Proteins p21(ras)/metabolism
- Snail Family Transcription Factors
- Transcription Factors/genetics
- Transcription Factors/metabolism
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Affiliation(s)
- Alexander P Stark
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Hui-Hua Chang
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Xiaoman Jung
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Aune Moro
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Kathleen Hertzer
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Mu Xu
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Andrea Schmidt
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - O Joe Hines
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Guido Eibl
- Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA.
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32
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Mohammed A, Janakiram NB, Pant S, Rao CV. Molecular Targeted Intervention for Pancreatic Cancer. Cancers (Basel) 2015; 7:1499-542. [PMID: 26266422 PMCID: PMC4586783 DOI: 10.3390/cancers7030850] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 07/24/2015] [Accepted: 08/04/2015] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer (PC) remains one of the worst cancers, with almost uniform lethality. PC risk is associated with westernized diet, tobacco, alcohol, obesity, chronic pancreatitis, and family history of pancreatic cancer. New targeted agents and the use of various therapeutic combinations have yet to provide adequate treatments for patients with advanced cancer. To design better preventive and/or treatment strategies against PC, knowledge of PC pathogenesis at the molecular level is vital. With the advent of genetically modified animals, significant advances have been made in understanding the molecular biology and pathogenesis of PC. Currently, several clinical trials and preclinical evaluations are underway to investigate novel agents that target signaling defects in PC. An important consideration in evaluating novel drugs is determining whether an agent can reach the target in concentrations effective to treat the disease. Recently, we have reported evidence for chemoprevention of PC. Here, we provide a comprehensive review of current updates on molecularly targeted interventions, as well as dietary, phytochemical, immunoregulatory, and microenvironment-based approaches for the development of novel therapeutic and preventive regimens. Special attention is given to prevention and treatment in preclinical genetically engineered mouse studies and human clinical studies.
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Affiliation(s)
- Altaf Mohammed
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| | - Naveena B Janakiram
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| | - Shubham Pant
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| | - Chinthalapally V Rao
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
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Mohammed A, Janakiram NB, Madka V, Brewer M, Ritchie RL, Lightfoot S, Kumar G, Sadeghi M, Patlolla JMR, Yamada HY, Cruz-Monserrate Z, May R, Houchen CW, Steele VE, Rao CV. Targeting pancreatitis blocks tumor-initiating stem cells and pancreatic cancer progression. Oncotarget 2015; 6:15524-39. [PMID: 25906749 PMCID: PMC4558168 DOI: 10.18632/oncotarget.3499] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/07/2015] [Indexed: 12/11/2022] Open
Abstract
Recent development of genetically engineered mouse models (GEMs) for pancreatic cancer (PC) that recapitulates human disease progression has helped to identify new strategies to delay/inhibit PC development. We first found that expression of the pancreatic tumor-initiating/cancer stem cells (CSC) marker DclK1 occurs in early stage PC and in both early and late pancreatic intraepithelial neoplasia (PanIN) and that it increases as disease progresses in GEM and also in human PC. Genome-wide next generation sequencing of pancreatic ductal adenocarcinoma (PDAC) from GEM mice revealed significantly increased DclK1 along with inflammatory genes. Genetic ablation of cyclo-oxygenase-2 (COX-2) decreased DclK1 in GEM. Induction of inflammation/pancreatitis with cerulein in GEM mice increased DclK1, and the novel dual COX/5-lipoxygenase (5-LOX) inhibitor licofelone reduced it. Dietary licofelone significantly inhibited the incidence of PDAC and carcinoma in situ with significant inhibition of pancreatic CSCs. Licofelone suppressed pancreatic tumor COX-2 and 5-LOX activities and modulated miRNAs characteristic of CSC and inflammation in correlation with PDAC inhibition. These results offer a preclinical proof of concept to target the inflammation initiation to inhibit cancer stem cells early for improving the treatment of pancreatic cancers, with immediate clinical implications for repositioning dual COX/5-LOX inhibitors in human trials for high risk patients.
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Affiliation(s)
- Altaf Mohammed
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Naveena B. Janakiram
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Venkateshwar Madka
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Misty Brewer
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Rebekah L. Ritchie
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Stan Lightfoot
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Gaurav Kumar
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael Sadeghi
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Jagan Mohan R. Patlolla
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Hiroshi Y. Yamada
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Zobeida Cruz-Monserrate
- Department of Cancer Biology, University of Texas, MD Anderson Cancer Center, Houston, TX, USA
| | - Randal May
- Digestive Diseases Section, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Courtney W. Houchen
- Digestive Diseases Section, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Vernon E. Steele
- Division of Cancer Prevention, Chemoprevention Agent Development Research Group, National Cancer Institute, Bethesda, MD, USA
| | - Chinthalapally V. Rao
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hem-Onc Section, PC Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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Crawford HC. Somatostatin receptor subtype 2 as pancreatic tumorigenesis suppressor: identification of a new targetable signaling node. Gastroenterology 2015; 148:1279-81. [PMID: 25921374 DOI: 10.1053/j.gastro.2015.04.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Howard C Crawford
- Departments of Molecular & Integrative Physiology and Internal Medicine, University of Michigan, Ann Arbor, Michigan.
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Zechner D, Radecke T, Amme J, Bürtin F, Albert AC, Partecke LI, Vollmar B. Impact of diabetes type II and chronic inflammation on pancreatic cancer. BMC Cancer 2015; 15:51. [PMID: 25885700 PMCID: PMC4336675 DOI: 10.1186/s12885-015-1047-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/28/2015] [Indexed: 12/24/2022] Open
Abstract
Background We explored if known risk factors for pancreatic cancer such as type II diabetes and chronic inflammation, influence the pathophysiology of an established primary tumor in the pancreas and if administration of metformin has an impact on tumor growth. Methods Pancreatic carcinomas were assessed in a syngeneic orthotopic pancreas adenocarcinoma model after injection of 6606PDA cells in the pancreas head of either B6.V-Lepob/ob mice exhibiting a type II diabetes-like syndrome or normoglycemic mice. Chronic pancreatitis was then induced by repetitive administration of cerulein. Cell proliferation, cell death, inflammation and the expression of cancer stem cell markers within the carcinomas was evaluated by immunohistochemistry. In addition, the impact of the antidiabetic drug, metformin, on the pathophysiology of the tumor was assessed. Results Diabetic mice developed pancreatic ductal adenocarcinomas with significantly increased tumor weight when compared to normoglycemic littermates. Diabetes caused increased proliferation of cancer cells, but did not inhibit cancer cell necrosis or apoptosis. Diabetes also reduced the number of Aldh1 expressing cancer cells and moderately decreased the number of tumor infiltrating chloracetate esterase positive granulocytes. The administration of metformin reduced tumor weight as well as cancer cell proliferation. Chronic pancreatitis significantly diminished the pancreas weight and increased lipase activity in the blood, but only moderately increased tumor weight. Conclusion We conclude that diabetes type II has a fundamental influence on pancreatic ductal adenocarcinoma by stimulating cancer cell proliferation, while metformin inhibits cancer cell proliferation. Chronic inflammation had only a minor effect on the pathophysiology of an established adenocarcinoma.
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Affiliation(s)
- Dietmar Zechner
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
| | - Tobias Radecke
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
| | - Jonas Amme
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
| | - Florian Bürtin
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
| | - Ann-Christin Albert
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
| | - Lars Ivo Partecke
- Department of General, Visceral, Thoracic and Vascular Surgery, University Medicine Greifswald, Ernst-Moritz-Arndt-University, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Germany.
| | - Brigitte Vollmar
- Institute for Experimental Surgery, Rostock University Medical Center, Schillingallee 69a, 18057, Rostock, Germany.
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Zhao J, Wang J, Du J, Xu H, Zhang W, Ni QX, Yu H, Risch HA, Gao YT, Gao Y. Urinary prostaglandin E2 metabolite and pancreatic cancer risk: case-control study in urban Shanghai. PLoS One 2015; 10:e0118004. [PMID: 25679523 PMCID: PMC4332509 DOI: 10.1371/journal.pone.0118004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 01/05/2015] [Indexed: 01/05/2023] Open
Abstract
Pancreatic cancer has been increasing in importance in Shanghai over the last four decades. The etiology of the disease is still unclear. Evidence suggests that the COX-2 pathway, an important component of inflammation, may be involved in the disease. We aimed to evaluate the association between urinary prostaglandin E2 metabolite (PGE-M) level and risk of pancreatic cancer. From a recent population-based case-control study in Shanghai, 200 pancreatic ductal adenocarcinoma cases and 200 gender- and age- frequency matched controls were selected for the present analysis. Urinary PGE-M was measured with a liquid chromatography/mass spectrometric assay. Adjusted unconditional logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs). A positive association was observed between PGE-M leve and pancreatic cancer risk: OR = 1.63 (95% CI 1.01–2.63) for the third tertile compared to the first. Though the interactions were not statistically significant, the associations tended to be stronger among subjects with diabetes history (OR = 3.32; 95% CI 1.20–9.19) and higher meat intake (OR = 2.12; 95% CI 1.10–4.06). The result suggests that higher urinary PGE-M level may be associated with increased risk of pancreatic ductal adenocarcinoma.
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Affiliation(s)
- Jing Zhao
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Jing Wang
- Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jinfeng Du
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Hongli Xu
- Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Wei Zhang
- Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Quan-Xing Ni
- Department of Pancreatic and Hepatobiliary Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Herbert Yu
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, United States of America
| | - Harvey A. Risch
- Department of Chronic Disease Epidemiology, Yale School of Public Health and Yale Cancer Center, New Haven, CT, United States of America
| | - Yu-Tang Gao
- Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
- * E-mail: (YG); (YTG)
| | - Ying Gao
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
- * E-mail: (YG); (YTG)
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Xu Z, Pothula SP, Wilson JS, Apte MV. Pancreatic cancer and its stroma: A conspiracy theory. World J Gastroenterol 2014; 20:11216-11229. [PMID: 25170206 PMCID: PMC4145760 DOI: 10.3748/wjg.v20.i32.11216] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/18/2013] [Accepted: 04/16/2014] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer is characterised by a prominent desmoplastic/stromal reaction that has received little attention until recent times. Given that treatments focusing on pancreatic cancer cells alone have failed to significantly improve patient outcome over many decades, research efforts have now moved to understanding the pathophysiology of the stromal reaction and its role in cancer progression. In this regard, our Group was the first to identify the cells (pancreatic stellate cells, PSCs) that produced the collagenous stroma of pancreatic cancer and to demonstrate that these cells interacted closely with cancer cells to facilitate local tumour growth and distant metastasis. Evidence is accumulating to indicate that stromal PSCs may also mediate angiogenesis, immune evasion and the well known resistance of pancreatic cancer to chemotherapy and radiotherapy. This review will summarise current knowledge regarding the critical role of pancreatic stellate cells and the stroma in pancreatic cancer biology and the therapeutic approaches being developed to target the stroma in a bid to improve the outcome of this devastating disease.
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Knab LM, Grippo PJ, Bentrem DJ. Involvement of eicosanoids in the pathogenesis of pancreatic cancer: The roles of cyclooxygenase-2 and 5-lipoxygenase. World J Gastroenterol 2014; 20:10729-10739. [PMID: 25152576 PMCID: PMC4138453 DOI: 10.3748/wjg.v20.i31.10729] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 01/30/2014] [Accepted: 04/09/2014] [Indexed: 02/06/2023] Open
Abstract
The interplay between inflammation and cancer progression is a growing area of research. A combination of clinical, epidemiological, and basic science investigations indicate that there is a relationship between inflammatory changes in the pancreas and neoplastic progression. Diets high in ω-6 polyunsaturated fatty acids provide increased substrate for arachidonic acid metabolism by cyclooxygenase-2 (COX-2) and 5-lipoxygenase (5-LOX) to form eicosanoids. These eicosanoids directly contribute to pancreatic cancer cell proliferation. Both COX-2 and 5-LOX are upregulated in multiple cancer types, including pancreatic cancer. In vitro studies using pancreatic cancer cell lines have demonstrated upregulation of COX-2 and 5-LOX at both the mRNA and protein levels. When COX-2 and 5-LOX are blocked via a variety of mechanisms, cancer cell proliferation is abrogated both in vitro and in vivo. The mechanism of COX-2 has been shown to include effects on apoptosis as well as angiogenesis. 5-LOX has been implicated in apoptosis. The use of COX-2 and 5-LOX inhibitors in clinical studies in patients with pancreatic cancer has been limited. Patient enrollment has been restricted to those with advanced disease which makes evaluation of these drugs as chemopreventive agents difficult. COX-2 and 5-LOX expression have been shown to be present during the early neoplastic changes of pancreatic cancer, well before progression to invasive disease. This indicates that the ideal role for these interventions is early in the disease process as preventive agents, perhaps in patients with chronic pancreatitis or hereditary pancreatitis.
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Holmer R, Goumas FA, Waetzig GH, Rose-John S, Kalthoff H. Interleukin-6: a villain in the drama of pancreatic cancer development and progression. Hepatobiliary Pancreat Dis Int 2014; 13:371-80. [PMID: 25100121 DOI: 10.1016/s1499-3872(14)60259-9] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Pancreatic ductal adenocarcinoma (PDAC) is a devastating malignancy with a poor prognosis and little treatment options. The development and progression of the disease is fostered by inflammatory cells and cytokines. One of these cytokines is interleukin-6 (IL-6), which plays an important role in a wide range of biologic activities. DATA SOURCES A systematic search of PubMed was performed to identify relevant studies using key words such as interleukin-6, inflammatory cytokines, inflammation and pancreatic cancer or PDAC. Articles related to IL-6 and pancreatic cancer were systematically reviewed. RESULTS IL-6 is elevated in the serum of pancreatic cancer patients and correlates with cachexia, advanced tumor stage and poor survival. Its expression is enhanced by hypoxia and proteins involved in pancreatic cancer development like Kras, mesothelin or ZIP4. IL-6 in turn contributes to the generation of a pro-tumorigenic microenvironment and is probably involved in angiogenesis and metastasis. In experimental mouse models of PDAC, IL-6 was important for the development and progression of precursor lesions. CONCLUSION IL-6 emerges as a key player in pancreatic cancer development and progression, and hence should be considered as a new therapeutic target.
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Affiliation(s)
- Reinhild Holmer
- Division of Molecular Oncology, Institute for Experimental Cancer Research, CCC-North, University of Kiel, D-24105 Kiel, Germany.
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Mao Y, Sarhan D, Steven A, Seliger B, Kiessling R, Lundqvist A. Inhibition of tumor-derived prostaglandin-e2 blocks the induction of myeloid-derived suppressor cells and recovers natural killer cell activity. Clin Cancer Res 2014; 20:4096-106. [PMID: 24907113 DOI: 10.1158/1078-0432.ccr-14-0635] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PURPOSE Increased frequencies of myeloid-derived suppressor cells (MDSC) correlate with poor prognosis in patients with cancers. Tumor-derived prostaglandin-E2 (PGE2) plays an important role in inducing MDSCs. However, the detailed mechanisms of this induction remain unknown. To develop targeted therapies for MDSCs, we sought to investigate the molecular basis of PGE2-regulated accumulation of MDSCs and their functional consequence on natural killer (NK) cell activity. EXPERIMENTAL DESIGN The effects of PGE2 in inducing phenotypic, signaling, and functional alternations on monocytes were analyzed in vitro. Suppression of NK-cell activity by PGE2-treated monocytes was compared with that of freshly isolated CD14(+)HLA-DR(low/-) monocytic MDSCs (moMDSC) from patients with melanoma. In addition, to explore the in vivo relevance of targeting PGE2 to reduce MDSC-mediated suppression of NK cells, we established a murine model, where tumor cells were disabled from cyclooxygenase-2 (COX-2) production. RESULTS Patient-derived moMDSCs inhibited NK-cell activity through the production of TGFβ. In vitro, binding of PGE2 to EP2 and EP4 receptors on monocytes activated the p38MAPK/ERK pathway and resulted in elevated secretion of TGFβ. Similar to moMDSCs, PGE2-treated monocytes potently suppressed NK-cell activity through production of TGFβ. Furthermore, silencing COX-2 in murine 4T1 tumor cells reduced the accumulation of CD11b(+)Gr1(+) MDSCs in the spleen, resulting in concomitant improved in vivo clearance of NK-cell sensitive YAC-1 cells. CONCLUSIONS Our results reveal an indispensable role of tumor-derived PGE2 in inducing MDSCs and suggest a favorable outcome of combining COX-2-targeted therapy and adoptive NK-cell transfer in patients with cancer.
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Affiliation(s)
- Yumeng Mao
- Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Institutet, Stockholm, Sweden; and
| | - Dhifaf Sarhan
- Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Institutet, Stockholm, Sweden; and
| | - André Steven
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Barbara Seliger
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Rolf Kiessling
- Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Institutet, Stockholm, Sweden; and
| | - Andreas Lundqvist
- Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Institutet, Stockholm, Sweden; and
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Zhang W, Nandakumar N, Shi Y, Manzano M, Smith A, Graham G, Gupta S, Vietsch EE, Laughlin SZ, Wadhwa M, Chetram M, Joshi M, Wang F, Kallakury B, Toretsky J, Wellstein A, Yi C. Downstream of mutant KRAS, the transcription regulator YAP is essential for neoplastic progression to pancreatic ductal adenocarcinoma. Sci Signal 2014; 7:ra42. [PMID: 24803537 PMCID: PMC4175524 DOI: 10.1126/scisignal.2005049] [Citation(s) in RCA: 285] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is an aggressive cancer with poor survival rates and frequently carries oncogenic KRAS mutation. However, KRAS has thus far not been a viable therapeutic target. We found that the abundance of YAP mRNA, which encodes Yes-associated protein (YAP), a protein regulated by the Hippo pathway during tissue development and homeostasis, was increased in human PDAC tissue compared with that in normal pancreatic epithelia. In genetically engineered Kras(G12D) and Kras(G12D):Trp53(R172H) mouse models, pancreas-specific deletion of Yap halted the progression of early neoplastic lesions to PDAC without affecting normal pancreatic development and endocrine function. Although Yap was dispensable for acinar to ductal metaplasia (ADM), an initial step in the progression to PDAC, Yap was critically required for the proliferation of mutant Kras or Kras:Trp53 neoplastic pancreatic ductal cells in culture and for their growth and progression to invasive PDAC in mice. Yap functioned as a critical transcriptional switch downstream of the oncogenic KRAS-mitogen-activated protein kinase (MAPK) pathway, promoting the expression of genes encoding secretory factors that cumulatively sustained neoplastic proliferation, a tumorigenic stromal response in the tumor microenvironment, and PDAC progression in Kras and Kras:Trp53 mutant pancreas tissue. Together, our findings identified Yap as a critical oncogenic KRAS effector and a promising therapeutic target for PDAC and possibly other types of KRAS-mutant cancers.
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Affiliation(s)
- Weiying Zhang
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Nivedita Nandakumar
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Yuhao Shi
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Mark Manzano
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Alias Smith
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Garrett Graham
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Swati Gupta
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Eveline E. Vietsch
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Sean Z. Laughlin
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Mandheer Wadhwa
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Mahandranauth Chetram
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Mrinmayi Joshi
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Fen Wang
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Bhaskar Kallakury
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Jeffrey Toretsky
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Anton Wellstein
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Chunling Yi
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
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Colvin EK, Scarlett CJ. A historical perspective of pancreatic cancer mouse models. Semin Cell Dev Biol 2014; 27:96-105. [PMID: 24685616 DOI: 10.1016/j.semcdb.2014.03.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 03/20/2014] [Accepted: 03/21/2014] [Indexed: 12/22/2022]
Abstract
Pancreatic cancer is an inherently aggressive disease with an extremely poor prognosis and lack of effective treatments. Over the past few decades, much has been uncovered regarding the pathogenesis of pancreatic cancer and the underlying genetic alterations necessary for tumour initiation and progression. Much of what we know about pancreatic cancer has come from mouse models of this disease. This review focusses on the development of genetically engineered mouse models that phenotypically and genetically recapitulate human pancreatic cancer, as well as the increasing use of patient-derived xenografts for preclinical studies and the development of personalised medicine strategies.
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Affiliation(s)
- Emily K Colvin
- Bill Walsh Translational Cancer Research Laboratory, Kolling Institute of Medical Research, University of Sydney, Royal North Shore Hospital, St Leonards, NSW, Australia.
| | - Christopher J Scarlett
- Pancreatic Cancer Research, Nutrition, Food and Health Research Group, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW, Australia.
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Wilson JS, Pirola RC, Apte MV. Stars and stripes in pancreatic cancer: role of stellate cells and stroma in cancer progression. Front Physiol 2014; 5:52. [PMID: 24592240 PMCID: PMC3924046 DOI: 10.3389/fphys.2014.00052] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 01/27/2014] [Indexed: 12/19/2022] Open
Abstract
Pancreatic cancer is a devastating disease with an unacceptably high mortality to incidence ratio. Traditional therapeutic approaches such as surgery in combination with chemo- or radiotherapy have had limited efficacy in improving the outcome of this disease. Up until just under a decade ago, the prominent desmoplastic reaction which is a characteristic of the majority of pancreatic ductal adenocarcinomas (PDAC) had been largely ignored. However, since the identification of the pancreatic stellate cell (PSC) as the key cell responsible for the production of the collagenous stroma in PDAC, increasing attention has been paid to the role of the stromal reaction in pancreatic cancer pathobiology. There is now compelling evidence that PSCs interact not only with cancer cells themselves, but with several other cell types in the stroma (endothelial cells, immune cells, and possibly neuronal cells) to promote cancer progression. This review summarizes current knowledge in the field about the influence of PSCs and the stromal microenvironment on cancer behavior and discusses novel therapeutic approaches which reflect an increasing awareness amongst clinicians and researchers that targeting cancer cells alone is no longer sufficient to improve patient outcome and that combinatorial treatments targeting the stroma as well as the cancer cells will be required to change the clinical course of this disease.
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Affiliation(s)
- Jeremy S Wilson
- Pancreatic Research Group, Faculty of Medicine, South Western Sydney Clinical School, Ingham Institute for Applied Medical Research, University of New South Wales Liverpool, NSW, Australia ; Ingham Institute for Applied Medical Research Liverpool, NSW, Australia
| | - Romano C Pirola
- Pancreatic Research Group, Faculty of Medicine, South Western Sydney Clinical School, Ingham Institute for Applied Medical Research, University of New South Wales Liverpool, NSW, Australia ; Ingham Institute for Applied Medical Research Liverpool, NSW, Australia
| | - Minoti V Apte
- Pancreatic Research Group, Faculty of Medicine, South Western Sydney Clinical School, Ingham Institute for Applied Medical Research, University of New South Wales Liverpool, NSW, Australia ; Ingham Institute for Applied Medical Research Liverpool, NSW, Australia
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The role of inflammation in pancreatic cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 816:129-51. [PMID: 24818722 DOI: 10.1007/978-3-0348-0837-8_6] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a devastating disease with an extremely poor prognosis. Inflammatory processes have emerged as key mediators of pancreatic cancer development and progression. In genetically engineered mouse models, induction of pancreatitis accelerates PDAC development, and patients with chronic pancreatitis are known to have a higher risk of developing pancreatic cancer. In recent years, much effort has been given to identify the underlying mechanisms that contribute to inflammation-induced tumorigenesis. Many inflammatory pathways have been identified and inhibitors have been developed in order to prevent cancer development and progression. In this chapter, we discuss the role of inflammatory pathways in the initiation and progression of pancreatic cancer as well as the role of inhibitors used in treatment and prevention of pancreatic cancer.
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Liou GY, Döppler H, Necela B, Krishna M, Crawford HC, Raimondo M, Storz P. Macrophage-secreted cytokines drive pancreatic acinar-to-ductal metaplasia through NF-κB and MMPs. ACTA ACUST UNITED AC 2013; 202:563-77. [PMID: 23918941 PMCID: PMC3734091 DOI: 10.1083/jcb.201301001] [Citation(s) in RCA: 211] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In response to inflammation, pancreatic acinar cells can undergo acinar-to-ductal metaplasia (ADM), a reprogramming event that induces transdifferentiation to a ductlike phenotype and, in the context of additional oncogenic stimulation, contributes to development of pancreatic cancer. The signaling mechanisms underlying pancreatitis-inducing ADM are largely undefined. Our results provide evidence that macrophages infiltrating the pancreas drive this transdifferentiation process. We identify the macrophage-secreted inflammatory cytokines RANTES and tumor necrosis factor α (TNF) as mediators of such signaling. Both RANTES and TNF induce ADM through activation of nuclear factor κB and its target genes involved in regulating survival, proliferation, and degradation of extracellular matrix. In particular, we identify matrix metalloproteinases (MMPs) as targets that drive ADM and provide in vivo data suggesting that MMP inhibitors may be efficiently applied to block pancreatitis-induced ADM in therapy.
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Affiliation(s)
- Geou-Yarh Liou
- Department of Cancer Biology, Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, Jacksonville, FL 32224, USA
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Abstract
The past several decades have seen great effort devoted to mimicking the key features of pancreatic ductal adenocarcinoma (PDAC) in animals and have produced 2 robust models of this deadly cancer. Carcinogen-treated Syrian hamsters develop PDAC with genetic lesions, which reproduce those of human, including activation of the Kras oncogene, and early studies in this species validated nongenetic risk factors for PDAC including pancreatitis, obesity, and diabetes. More recently, PDAC research has been invigorated by the development of genetically engineered mouse models based on tissue-specific Kras activation and deletion of tumor suppressor genes. Surprisingly, mouse PDAC appears to arise from exocrine acinar rather than ductal cells, via a process of phenotypic reprogramming that is accelerated by inflammation. Studies in both models have uncovered molecular mechanisms by which inflammation promotes and sustains PDAC and identified targets for chemoprevention to suppress PDAC in high-risk individuals. The mouse model, in particular, has also been instrumental in developing new approaches to early detection as well as treatment of advanced disease. Together, animal models enable diverse approaches to basic and preclinical research on pancreatic cancer, the results of which will accelerate progress against this currently intractable cancer.
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Affiliation(s)
- L Charles Murtaugh
- 1Department of Human Genetics, University of Utah, Salt Lake City, Utah, USA
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Grandhi BK, Thakkar A, Wang J, Prabhu S. A novel combinatorial nanotechnology-based oral chemopreventive regimen demonstrates significant suppression of pancreatic cancer neoplastic lesions. Cancer Prev Res (Phila) 2013; 6:1015-1025. [PMID: 24072676 DOI: 10.1158/1940-6207.capr-13-0172] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pancreatic cancer is a deadly disease killing 37,000 Americans each year. Despite two decades of research on treatment options, the chances of survival are still less than 5% upon diagnosis. Recently, chemopreventive strategies have gained considerable attention as an alternative to treatment. We have previously shown significant in vitro chemopreventive effects with low-dose combinations of aspirin, curcumin, and sulforaphane (ACS) on pancreatic cancer cell lines. Here, we report the results of 24-week chemopreventive study with the oral administration of ACS combinations on the N-nitrosobis (2-oxopropyl) amine (BOP)-treated Syrian golden hamster model to suppress the progression of pancreatic intraepithelial neoplasms (PanIN) using unmodified (free drug) combinations of ACS, and nanoencapsulated (solid lipid nanoparticles; SLN) combinations of aspirin, curcumin, and free sulforaphane. The use of three different doses (low, medium, and high) of unmodified ACS combinations exhibited reduction in tumor incidence by 18%, 50%, and 68.7% respectively; whereas the modified nanoencapsulated ACS regimens reduced tumor incidence by 33%, 67%, and 75%, respectively, at 10 times lower dose compared with the free drug combinations. Similarly, although the unmodified free ACS showed a notable reduction in cell proliferation, the SLN encapsulated ACS regimens showed significant reduction in cell proliferation at 6.3%, 58.6%, and 72.8% as evidenced by proliferating cell nuclear antigen expression. Cell apoptotic indices were also upregulated by 1.5, 2.8, and 3.2 times, respectively, compared with BOP control. These studies provide a proof-of-concept for the use of an oral, low-dose, nanotechnology-based combinatorial regimen for the long-term chemoprevention of pancreatic cancer.
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Affiliation(s)
- B Karthik Grandhi
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 E 2 Street, Pomona, CA 91766, USA
| | - Arvind Thakkar
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 E 2 Street, Pomona, CA 91766, USA
| | - Jeffrey Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 E 2 Street, Pomona, CA 91766, USA
| | - Sunil Prabhu
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 E 2 Street, Pomona, CA 91766, USA
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48
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Impact of non-steroidal anti-inflammatory drugs on gastrointestinal cancers: current state-of-the science. Cancer Lett 2013; 345:249-57. [PMID: 24021750 DOI: 10.1016/j.canlet.2013.09.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Revised: 08/28/2013] [Accepted: 09/02/2013] [Indexed: 12/16/2022]
Abstract
Growing evidence from epidemiologic and preclinical studies suggests that nonsteroidal anti-inflammatory drugs (NSAIDs) reduce the risk of gastrointestinal (GI) cancers, including esophageal, gastric, pancreatic, colorectal cancer, and hepatocellular carcinoma. However, there is also evidence indicating the absence of this benefit. The exact mechanism of NSAIDs' action on GI tumors is not known. Although some studies have suggested inhibition of carcinogenesis by NSAIDs through suppression effect on inflammation-associated cyclooxygenase-2 (COX-2) expression, other studies have suggested COX-2-independent mechanisms. Herein, we summarize the current state of-the-science regarding NSAID benefit for patients with GI cancers.
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49
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Chronic pancreatitis: a path to pancreatic cancer. Cancer Lett 2013; 345:203-9. [PMID: 23981573 DOI: 10.1016/j.canlet.2013.08.015] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 08/06/2013] [Accepted: 08/13/2013] [Indexed: 02/08/2023]
Abstract
Chronic pancreatitis predisposes to pancreatic cancer development and both diseases share a common etiology. A central role has been proposed for the digestive enzyme-secreting acinar cell that can undergo ductal metaplasia in the inflammatory environment of pancreatitis. This metaplastic change is now a recognised precursor of pancreatic cancer. Inflammatory molecules also foster tumour growth through autocrine and paracrine effects in the epithelium and the stroma. These insights have raised new opportunities such as the manipulation of inflammation as a preventive and/or therapeutic strategy for pancreatic cancer. Finally, we address the need for an in-depth study of the pancreatic acinar cells.
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50
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Dawson DW, Hertzer K, Moro A, Donald G, Chang HH, Go VL, Pandol SJ, Lugea A, Gukovskaya AS, Li G, Hines OJ, Rozengurt E, Eibl G. High-fat, high-calorie diet promotes early pancreatic neoplasia in the conditional KrasG12D mouse model. Cancer Prev Res (Phila) 2013; 6:1064-73. [PMID: 23943783 DOI: 10.1158/1940-6207.capr-13-0065] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
There is epidemiologic evidence that obesity increases the risk of cancers. Several underlying mechanisms, including inflammation and insulin resistance, are proposed. However, the driving mechanisms in pancreatic cancer are poorly understood. The goal of the present study was to develop a model of diet-induced obesity and pancreatic cancer development in a state-of-the-art mouse model, which resembles important clinical features of human obesity, for example, weight gain and metabolic disturbances. Offspring of Pdx-1-Cre and LSL-KrasG12D mice were allocated to either a high-fat, high-calorie diet (HFCD; ∼4,535 kcal/kg; 40% of calories from fats) or control diet (∼3,725 kcal/kg; 12% of calories from fats) for 3 months. Compared with control animals, mice fed with the HFCD significantly gained more weight and developed hyperinsulinemia, hyperglycemia, hyperleptinemia, and elevated levels of insulin-like growth factor I (IGF-I). The pancreas of HFCD-fed animals showed robust signs of inflammation with increased numbers of infiltrating inflammatory cells (macrophages and T cells), elevated levels of several cytokines and chemokines, increased stromal fibrosis, and more advanced PanIN lesions. Our results show that a diet high in fats and calories leads to obesity and metabolic disturbances similar to humans and accelerates early pancreatic neoplasia in the conditional KrasG12D mouse model. This model and findings will provide the basis for more robust studies attempting to unravel the mechanisms underlying the cancer-promoting properties of obesity, as well as to evaluate dietary- and chemopreventive strategies targeting obesity-associated pancreatic cancer development.
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Affiliation(s)
- David W Dawson
- Department of Surgery, David Geffen School of Medicine, University of California at Los Angeles, 10833 LeConte Avenue, 72-236 CHS, Los Angeles, CA 90095.
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