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Pothuraju R, Khan I, Jain M, Bouvet M, Malafa M, Roy HK, Kumar S, Batra SK. Colorectal cancer murine models: Initiation to metastasis. Cancer Lett 2024; 587:216704. [PMID: 38360138 DOI: 10.1016/j.canlet.2024.216704] [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: 10/23/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/17/2024]
Abstract
Despite significant advancements in prevention and treatment, colorectal cancer (CRC) remains the third leading cause of cancer-related deaths. Animal models, including xenografts, syngeneic, and genetically engineered, have emerged as indispensable tools in cancer research. These models offer a valuable platform to address critical questions regarding molecular pathogenesis and test therapeutic interventions before moving on to clinical trials. Advancements in CRC animal models have also facilitated the advent of personalized and precision medicine. Patient-derived xenografts and genetically engineered mice that mirror features of human tumors allow for tailoring treatments to specific CRC subtypes, improving treatment outcomes and quality of life. To overcome the limitations of individual model systems, recent studies have employed a multi-modal approach, combining different animal models, 3D organoids, and in vitro studies. This integrative approach provides a comprehensive understanding of CRC biology, including the tumor microenvironment and therapeutic responses, driving the development of more effective and personalized therapeutic interventions. This review discusses the animal models used for CRC research, including recent advancements and limitations of these animal models.
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Affiliation(s)
- Ramesh Pothuraju
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE-68198, USA; Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, 695014, Kerala, India
| | - Imran Khan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE-68198, USA
| | - Maneesh Jain
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE-68198, USA; Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE-68198, USA
| | - Michael Bouvet
- Department of Surgery, University of California San Diego, California, USA
| | - Mokenge Malafa
- Department of Gastrointestinal Oncology, Moffitt Cancer Center, Tampa, FL, 33612, USA
| | - Hemant K Roy
- Department of Medicine, Baylor College of Medicine, Houston, TX-77030, USA
| | - Sushil Kumar
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE-68198, USA; Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE-68198, USA.
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE-68198, USA; Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE-68198, USA; Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE-68198, USA.
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2
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Mu J, Wu J, Duan L, Yang Q, Liu X, Bai H, Xie Y, Li J, Wang S. Exploring the effects and mechanism of peony pollen in treating benign prostatic hyperplasia. Heliyon 2023; 9:e22212. [PMID: 38034660 PMCID: PMC10685364 DOI: 10.1016/j.heliyon.2023.e22212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 12/02/2023] Open
Abstract
Paeonia suffruticosa is widely cultivated globally due to its medicinal and ornamental value. Peony pollen (PP) is commonly used in Chinese folk medicine to make tea to treat benign prostatic hyperplasia (BPH), but its molecular mechanism against BPH is yet to be comprehended. The objective of this research was to experimentally verify the effect of PP in the treatment of BPH and to preliminarily reveal its mechanism of action on BPH using network pharmacology methods. The results revealed that PP could decrease prostate volume and prostate index, serum testosterone (T), dihydrotestosterone (DHT), and estradiol (E2) levels. Moreover, it could improve prostate tissue structure in BPH model animals as well. Additionally, database searches and disease target matching revealed 81 compounds in PP. Of these, 3, 7, 8, 2'-tetrahydroxyflavone, Chrysin, Wogonin, Limocitrin, and Sexangularetin were the top five compounds associated with the therapeutic effects of BPH. Furthermore, 177 therapeutic targets for BPH were retrieved from databases of Swiss Target, DisGeNET, Drugbank, Genecards, OMIM, TTD, and Uniprot. In contrast, core targets AKT1, EGFR, IL6, TNF, and VEGFA were obtained by PPI network diagram. Molecular docking also showed that the main efficacy components and potential core targets in PP had good binding capacity. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomics (KEGG) analysis established that the effect of PP in BPH therapy was mainly through regulating the expression levels of protein kinase B on phosphatidylinositol 3-kinase and phosphatidylinositol 3-kinase-protein kinase B pathways. Additionally, Western blot experiments also exhibited a significant elevation in the activated PI3K and AKT proteins in the model (Mod) group relative to the control (Con) group, and the expression of these activated proteins was significantly reduced after PP administration. In summary, this research provides a scientific basis for employing PP to treat BPH, preliminarily reveals its mechanism of action and potential targets, and lays the foundation for further research and development.
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Affiliation(s)
- Jun Mu
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Junsheng Wu
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Linrui Duan
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Qian Yang
- Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, Air Force Medical University, 710032, Xi'an, China
| | - Xiaoting Liu
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Huixin Bai
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Yanhua Xie
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Jie Li
- Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, Air Force Medical University, 710032, Xi'an, China
| | - Siwang Wang
- Biomedicine Key Laboratory, College of Life Sciences, Northwest University, Xi'an, 710069, China
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3
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Zhang J, Croft J, Le A. Familial CCM Genes Might Not Be Main Drivers for Pathogenesis of Sporadic CCMs-Genetic Similarity between Cancers and Vascular Malformations. J Pers Med 2023; 13:jpm13040673. [PMID: 37109059 PMCID: PMC10143507 DOI: 10.3390/jpm13040673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/05/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
Cerebral cavernous malformations (CCMs) are abnormally dilated intracranial capillaries that form cerebrovascular lesions with a high risk of hemorrhagic stroke. Recently, several somatic "activating" gain-of-function (GOF) point mutations in PIK3CA (phosphatidylinositol-4, 5-bisphosphate 3-kinase catalytic subunit p110α) were discovered as a dominant mutation in the lesions of sporadic forms of cerebral cavernous malformation (sCCM), raising the possibility that CCMs, like other types of vascular malformations, fall in the PIK3CA-related overgrowth spectrum (PROS). However, this possibility has been challenged with different interpretations. In this review, we will continue our efforts to expound the phenomenon of the coexistence of gain-of-function (GOF) point mutations in the PIK3CA gene and loss-of-function (LOF) mutations in CCM genes in the CCM lesions of sCCM and try to delineate the relationship between mutagenic events with CCM lesions in a temporospatial manner. Since GOF PIK3CA point mutations have been well studied in reproductive cancers, especially breast cancer as a driver oncogene, we will perform a comparative meta-analysis for GOF PIK3CA point mutations in an attempt to demonstrate the genetic similarities shared by both cancers and vascular anomalies.
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Affiliation(s)
- Jun Zhang
- Departments of Molecular & Translational Medicine (MTM), Texas Tech University Health Science Center El Paso (TTUHSCEP), El Paso, TX 79905, USA
| | - Jacob Croft
- Departments of Molecular & Translational Medicine (MTM), Texas Tech University Health Science Center El Paso (TTUHSCEP), El Paso, TX 79905, USA
| | - Alexander Le
- Departments of Molecular & Translational Medicine (MTM), Texas Tech University Health Science Center El Paso (TTUHSCEP), El Paso, TX 79905, USA
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4
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Dey DK, Sharma C, Vadlamudi Y, Kang SC. CopA3 peptide inhibits MDM2-p53 complex stability in colorectal cancers and activates p53 mediated cell death machinery. Life Sci 2023; 318:121476. [PMID: 36758667 DOI: 10.1016/j.lfs.2023.121476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/23/2023] [Accepted: 02/02/2023] [Indexed: 02/10/2023]
Abstract
The diverse expression patterns of the tumor suppressor p53 in cancer cells reflect the regulatory efficiency of multiple cellular pathways. By contrast, many human tumors are reported to develop in the presence of wild-type p53. Recently, several oncogene inhibitors have been used clinically to suppress tumor development by functionally reactivating other oncoproteins. On the other hand, p53 reactivation therapies have not been well established, as few of the p53-MDM2 complex inhibitors such as Nutlin-3 induces mutation in p53 gene upon prolonged usage. Therefore, in this study CopA3, a 9-mer dimeric D-type peptide with anticancer activity against the human colorectal cancer cells, was used to explore the efficacy of p53 reactivation in-vitro and in-vivo. The anticancer activity of CopA3 was more selective towards the wild-type p53 expressing cells than the p53 deficient or mutant colorectal cancer cells. In response to this, this study investigated the signaling pathway in vitro and validated its anti-tumor activity in-vivo. The protein-peptide interaction and molecular docking efficiently provided insight into the specific binding affinity of CopA3 to the p53-binding pocket of the MDM2 protein, which efficiently blocked the p53 and MDM2 interaction. CopA3 plays a crucial role in the binding with MDM2 and enhanced the nuclear translocation of the p53 protein, which sequentially activated the downstream targets to trigger the autophagic mediated cell death machinery through the JNK/Beclin-1 mediated pathway. Collectively, CopA3 affected the MDM2-p53 interaction, which suppressed tumor development. This study may provide a novel inhibitor candidate for the MDM2-p53 complex, which could ultimately suppress the growth of colorectal cancer cells without being cytotoxic to the healthy neighboring cells present around the tumor microenvironment.
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Affiliation(s)
- Debasish Kumar Dey
- Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Chanchal Sharma
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Yellamandayya Vadlamudi
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Sun Chul Kang
- Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea.
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5
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Leystra AA, Gilsdorf BJ, Wisinger AM, Warda ER, Wiegand S, Zahm CD, Matkowskyj KA, Deming DA, Khan N, Rosemarie Q, Sievers CK, Schwartz AR, Albrecht DM, Clipson L, Mukhtar H, Newton MA, Halberg RB. Multi-ancestral origin of intestinal tumors: Impact on growth, progression, and drug efficacy. Cancer Rep (Hoboken) 2021; 5:e1459. [PMID: 34245130 PMCID: PMC8842699 DOI: 10.1002/cnr2.1459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/24/2021] [Accepted: 04/21/2021] [Indexed: 11/07/2022] Open
Abstract
Background Data are steadily accruing that demonstrate that intestinal tumors are frequently derived from multiple founding cells, resulting in tumors comprised of distinct ancestral clones that might cooperate or alternatively compete, thereby potentially impacting different phases of the disease process. Aim We sought to determine whether tumors with a multi‐ancestral architecture involving at least two distinct clones show increased tumor number, growth, progression, or resistance to drug intervention. Methods Mice carrying the Min allele of Apc were generated that were mosaic with only a subset of cells in the intestinal epithelium expressing an activated form of PI3K, a key regulatory kinase affecting several important cellular processes. These cells were identifiable as they fluoresced green, whereas all other cells fluoresced red. Results Cell lineage tracing revealed that many intestinal tumors from our mouse model were derived from at least two founding cells, those expressing the activated PI3K (green) and those which did not (red). Heterotypic tumors with a multi‐ancestral architecture as evidenced by a mixture of green and red cells exhibited increased tumor growth and invasiveness. Clonal architecture also had an impact on tumor response to low‐dose aspirin. Aspirin treatment resulted in a greater reduction of heterotypic tumors derived from multiple founding cells as compared to tumors derived from a single founding cell. Conclusion These data indicate that genetically distinct tumor‐founding cells can contribute to early intratumoral heterogeneity. The coevolution of the founding cells and their progeny enhances colon tumor progression and impacts the response to aspirin. These findings are important to a more complete understanding of tumorigenesis with consequences for several distinct models of tumor evolution. They also have practical implications to the clinic. Mouse models with heterogenous tumors are likely better for predicting drug efficacy as compared to models in which the tumors are highly homogeneous. Moreover, understanding how interactions among different populations in a single heterotypic tumor with a multi‐ancestral architecture impact response to a single agent and combination therapies are necessary to fully develop personalized medicine.
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Affiliation(s)
- Alyssa A Leystra
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,Division of Gastroenterology and Hepatology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Brock J Gilsdorf
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Amanda M Wisinger
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Elise R Warda
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Shanna Wiegand
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Christopher D Zahm
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Kristina A Matkowskyj
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Dustin A Deming
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Naghma Khan
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,Department of Dermatology, University of Wisconsin, Madison, Wisconsin, USA
| | - Quincy Rosemarie
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Chelsie K Sievers
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,Division of Gastroenterology and Hepatology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Alexander R Schwartz
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Dawn M Albrecht
- Division of Gastroenterology and Hepatology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Linda Clipson
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Hasan Mukhtar
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,Department of Dermatology, University of Wisconsin, Madison, Wisconsin, USA
| | - Michael A Newton
- Department of Statistics, University of Wisconsin-Madison, Madison, Wisconsin, USA.,Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Richard B Halberg
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,Division of Gastroenterology and Hepatology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.,University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA
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6
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Zheng G, Zhang G, Zhao Y, Zheng Z. Screening of miRNAs as Prognostic Biomarkers for Colon Adenocarcinoma and Biological Function Analysis of Their Target Genes. Front Oncol 2021; 11:560136. [PMID: 33816220 PMCID: PMC8017316 DOI: 10.3389/fonc.2021.560136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/28/2021] [Indexed: 12/24/2022] Open
Abstract
We constructed a prognostic risk model for colon adenocarcinoma (COAD) using microRNAs (miRNAs) as biomarkers. Clinical data of patients with COADs and miRNA-seq data were from TCGA, and the differential expression of miRNAs (carcinoma vs. para-carcinoma tissues) was assessed using R software. COAD data were randomly divided into Training and Testing Sets. A linear prognostic risk model was constructed using Cox regression analysis based on the Training Set. Patients were classified as high-risk or low-risk according to the score of the prognostic model. Survival analysis and receiver operating characteristic (ROC) curves were used to evaluate model performance. The gene targets in the prognostic model were identified and their biological functions were analyzed. Analysis of COAD and normal cell lines using qPCR was used to verify the model. There were 134 up-regulated and 140 down-regulated miRNAs. We used the Training Set to develop a prognostic model based on the expression of seven miRNAs. ROC analysis indicated this model had acceptable prediction accuracy (area under the curve=0.784). Kaplan-Meier survival analysis showed that overall survival was worse in the high-risk group. Cox regression analysis showed that the 7-miRNA Risk Score was an independent prognostic factor. The 2,863 predicted target genes were mainly enriched in the MAPK, PI3K-AKT, proteoglycans in cancer, and mTOR signaling pathways. For unknown reasons, expression of these miRNAs in cancerous and normal cells differed somewhat from model predictions. Regardless, the 7-miRNA Risk Score can be used to predict COAD prognosis and may help to guide clinical treatment.
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Affiliation(s)
- Guoliang Zheng
- Department of Gastric Surgery, Cancer Hospital of China Medical University (Liaoning Cancer Hospital and Institute), Shenyang, China
| | - GuoJun Zhang
- Department of Pathophysiology, College of Basic Medicine Science, China Medical University, Shenyang, China
| | - Yan Zhao
- Department of Gastric Surgery, Cancer Hospital of China Medical University (Liaoning Cancer Hospital and Institute), Shenyang, China
| | - Zhichao Zheng
- Department of Gastric Surgery, Cancer Hospital of China Medical University (Liaoning Cancer Hospital and Institute), Shenyang, China
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7
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O’Connell E, Reynolds IS, McNamara DA, Burke JP, Prehn JHM. Resistance to Cell Death in Mucinous Colorectal Cancer-A Review. Cancers (Basel) 2021; 13:cancers13061389. [PMID: 33808549 PMCID: PMC8003305 DOI: 10.3390/cancers13061389] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/07/2021] [Accepted: 03/10/2021] [Indexed: 12/14/2022] Open
Abstract
Mucinous colorectal cancer (CRC) is estimated to occur in approximately 10-15% of CRC cases and is characterized by abundant extracellular mucin. Mucinous CRC is frequently associated with resistance to apoptosis. Inferior prognosis is observed in mucinous CRC, particularly in rectal cancer and metastatic cases. Mucins are heavily glycosylated secretory or transmembrane proteins that participate in protection of the colonic epithelium. MUC2 overexpression is a hallmark of mucinous CRCs. Mucinous CRC is associated with KRAS and BRAF mutation, microsatellite instability and the CpG island methylator phenotype. Mutations of the APC gene and p53 mutations which are characteristic non-mucinous colorectal adenocarcinoma are less common in mucinous CRC. Both physical and anti-apoptotic properties of mucin provide mechanisms for resistance to cell death. Mucin glycoproteins are associated with decreased expression of pro-apoptotic proteins, increased expression of anti-apoptotic proteins and increased cell survival signaling. The role for BCL-2 proteins, including BCL-XL, in preventing apoptosis in mucinous CRC has been explored to a limited extent. Additional mechanisms opposing cell death include altered death receptor expression and altered mutation rates in genes responsible for chemotherapy resistance. The roles of alternate cell death programs including necroptosis and pyroptosis are not well understood in mucinous CRC. While the presence of MUC2 is associated with an immunosuppressive environment, the tumor immune environment of mucinous CRC and the role of immune-mediated tumor cell death likewise require further investigation. Improved understanding of cell death mechanisms in mucinous CRC may allow modification of currently used regimens and facilitate targeted treatment.
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Affiliation(s)
- Emer O’Connell
- Department of Colorectal Surgery, Beaumont Hospital, Dublin 9, Ireland; (E.O.); (I.S.R.); (D.A.M.); (J.P.B.)
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Ian S. Reynolds
- Department of Colorectal Surgery, Beaumont Hospital, Dublin 9, Ireland; (E.O.); (I.S.R.); (D.A.M.); (J.P.B.)
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Deborah A. McNamara
- Department of Colorectal Surgery, Beaumont Hospital, Dublin 9, Ireland; (E.O.); (I.S.R.); (D.A.M.); (J.P.B.)
- Department of Surgery, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - John P. Burke
- Department of Colorectal Surgery, Beaumont Hospital, Dublin 9, Ireland; (E.O.); (I.S.R.); (D.A.M.); (J.P.B.)
| | - Jochen H. M. Prehn
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin 2, Ireland
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin 2, Ireland
- Correspondence:
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8
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Varga J, Nicolas A, Petrocelli V, Pesic M, Mahmoud A, Michels BE, Etlioglu E, Yepes D, Häupl B, Ziegler PK, Bankov K, Wild PJ, Wanninger S, Medyouf H, Farin HF, Tejpar S, Oellerich T, Ruland J, Siebel CW, Greten FR. AKT-dependent NOTCH3 activation drives tumor progression in a model of mesenchymal colorectal cancer. J Exp Med 2021; 217:151998. [PMID: 32749453 PMCID: PMC7537393 DOI: 10.1084/jem.20191515] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 03/26/2020] [Accepted: 06/05/2020] [Indexed: 01/15/2023] Open
Abstract
Recently, a transcriptome-based consensus molecular subtype (CMS) classification of colorectal cancer (CRC) has been established, which may ultimately help to individualize CRC therapy. However, the lack of animal models that faithfully recapitulate the different molecular subtypes impedes adequate preclinical testing of stratified therapeutic concepts. Here, we demonstrate that constitutive AKT activation in intestinal epithelial cells markedly enhances tumor invasion and metastasis in Trp53ΔIEC mice (Trp53ΔIECAktE17K) upon challenge with the carcinogen azoxymethane. Gene-expression profiling indicates that Trp53ΔIECAktE17K tumors resemble the human mesenchymal colorectal cancer subtype (CMS4), which is characterized by the poorest survival rate among the four CMSs. Trp53ΔIECAktE17K tumor cells are characterized by Notch3 up-regulation, and treatment of Trp53ΔIECAktE17K mice with a NOTCH3-inhibiting antibody reduces invasion and metastasis. In CRC patients, NOTCH3 expression correlates positively with tumor grading and the presence of lymph node as well as distant metastases and is specifically up-regulated in CMS4 tumors. Therefore, we suggest NOTCH3 as a putative target for advanced CMS4 CRC patients.
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Affiliation(s)
- Julia Varga
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany
| | - Adele Nicolas
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany
| | - Valentina Petrocelli
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany
| | - Marina Pesic
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany
| | - Abdelrahman Mahmoud
- German Cancer Research Center, Division of Applied Bioinformatics, Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Birgitta E Michels
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany
| | - Emre Etlioglu
- Digestive Oncology Unit, Department of Oncology, University Hospital Leuven, Leuven, Belgium
| | - Diego Yepes
- German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany.,Department of Medicine II, Hematology/Oncology, University Hospital Frankfurt, Frankfurt/Main, Germany
| | - Björn Häupl
- Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany.,German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany.,Department of Medicine II, Hematology/Oncology, University Hospital Frankfurt, Frankfurt/Main, Germany
| | - Paul K Ziegler
- Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, Frankfurt/Main, Germany
| | - Katrin Bankov
- Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, Frankfurt/Main, Germany
| | - Peter J Wild
- Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, Frankfurt/Main, Germany
| | - Stefan Wanninger
- Institute of Clinical Chemistry and Pathobiochemistry, Technical University of Munich School of Medicine, Technical University of Munich, Munich, Germany
| | - Hind Medyouf
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany
| | - Henner F Farin
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany.,German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany
| | - Sabine Tejpar
- Digestive Oncology Unit, Department of Oncology, University Hospital Leuven, Leuven, Belgium
| | - Thomas Oellerich
- Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany.,German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany.,Department of Medicine II, Hematology/Oncology, University Hospital Frankfurt, Frankfurt/Main, Germany
| | - Jürgen Ruland
- German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany.,Institute of Clinical Chemistry and Pathobiochemistry, Technical University of Munich School of Medicine, Technical University of Munich, Munich, Germany
| | | | - Florian R Greten
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Frankfurt/Main, Germany.,Frankfurt Cancer Institute, Goethe University Frankfurt, Frankfurt/Main, Germany.,German Cancer Consortium and German Cancer Research Center, Heidelberg, Germany
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9
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Buikhuisen JY, Torang A, Medema JP. Exploring and modelling colon cancer inter-tumour heterogeneity: opportunities and challenges. Oncogenesis 2020; 9:66. [PMID: 32647253 PMCID: PMC7347540 DOI: 10.1038/s41389-020-00250-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 06/10/2020] [Accepted: 06/23/2020] [Indexed: 02/06/2023] Open
Abstract
Colon cancer inter-tumour heterogeneity is installed on multiple levels, ranging from (epi)genetic driver events to signalling pathway rewiring reflected by differential gene expression patterns. Although the existence of heterogeneity in colon cancer has been recognised for a longer period of time, it is sparingly incorporated as a determining factor in current clinical practice. Here we describe how unsupervised gene expression-based classification efforts, amongst which the consensus molecular subtypes (CMS), can stratify patients in biological subgroups associated with distinct disease outcome and responses to therapy. We will discuss what is needed to extend these subtyping efforts to the clinic and we will argue that preclinical models recapitulate CMS subtypes and can be of vital use to increase our understanding of treatment response and resistance and to discover novel targets for therapy.
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Affiliation(s)
- Joyce Y Buikhuisen
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental Molecular Medicine, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.,Oncode Institute, Amsterdam, The Netherlands
| | - Arezo Torang
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental Molecular Medicine, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.,Oncode Institute, Amsterdam, The Netherlands
| | - Jan Paul Medema
- Laboratory for Experimental Oncology and Radiobiology, Center for Experimental Molecular Medicine, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands. .,Oncode Institute, Amsterdam, The Netherlands.
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10
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Bürtin F, Mullins CS, Linnebacher M. Mouse models of colorectal cancer: Past, present and future perspectives. World J Gastroenterol 2020; 26:1394-1426. [PMID: 32308343 PMCID: PMC7152519 DOI: 10.3748/wjg.v26.i13.1394] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/05/2020] [Accepted: 03/09/2020] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) is the third most common diagnosed malignancy among both sexes in the United States as well as in the European Union. While the incidence and mortality rates in western, high developed countries are declining, reflecting the success of screening programs and improved treatment regimen, a rise of the overall global CRC burden can be observed due to lifestyle changes paralleling an increasing human development index. Despite a growing insight into the biology of CRC and many therapeutic improvements in the recent decades, preclinical in vivo models are still indispensable for the development of new treatment approaches. Since the development of carcinogen-induced rodent models for CRC more than 80 years ago, a plethora of animal models has been established to study colon cancer biology. Despite tenuous invasiveness and metastatic behavior, these models are useful for chemoprevention studies and to evaluate colitis-related carcinogenesis. Genetically engineered mouse models (GEMM) mirror the pathogenesis of sporadic as well as inherited CRC depending on the specific molecular pathways activated or inhibited. Although the vast majority of CRC GEMM lack invasiveness, metastasis and tumor heterogeneity, they still have proven useful for examination of the tumor microenvironment as well as systemic immune responses; thus, supporting development of new therapeutic avenues. Induction of metastatic disease by orthotopic injection of CRC cell lines is possible, but the so generated models lack genetic diversity and the number of suited cell lines is very limited. Patient-derived xenografts, in contrast, maintain the pathological and molecular characteristics of the individual patient’s CRC after subcutaneous implantation into immunodeficient mice and are therefore most reliable for preclinical drug development – even in comparison to GEMM or cell line-based analyses. However, subcutaneous patient-derived xenograft models are less suitable for studying most aspects of the tumor microenvironment and anti-tumoral immune responses. The authors review the distinct mouse models of CRC with an emphasis on their clinical relevance and shed light on the latest developments in the field of preclinical CRC models.
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Affiliation(s)
- Florian Bürtin
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, University of Rostock, Rostock 18057, Germany
| | - Christina S Mullins
- Department of Thoracic Surgery, University Medical Center Rostock, University of Rostock, Rostock 18057, Germany
| | - Michael Linnebacher
- Molecular Oncology and Immunotherapy, Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock 18057, Germany
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11
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Wegner KA, Mueller BR, Unterberger CJ, Avila EJ, Ruetten H, Turco AE, Oakes SR, Girardi NM, Halberg RB, Swanson SM, Marker PC, Vezina CM. Prostate epithelial-specific expression of activated PI3K drives stromal collagen production and accumulation. J Pathol 2019; 250:231-242. [PMID: 31674011 DOI: 10.1002/path.5363] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/30/2019] [Accepted: 10/27/2019] [Indexed: 01/01/2023]
Abstract
We genetically engineered expression of an activated form of P110 alpha, the catalytic subunit of PI3K, in mouse prostate epithelium to create a mouse model of direct PI3K activation (Pbsn-cre4Prb;PI3KGOF/+ ). We hypothesized that direct activation would cause rapid neoplasia and cancer progression. Pbsn-cre4Prb;PI3KGOF/+ mice developed widespread prostate intraepithelial hyperplasia, but stromal invasion was limited and overall progression was slower than anticipated. However, the model produced profound and progressive stromal remodeling prior to explicit epithelial neoplasia. Increased stromal cellularity and inflammatory infiltrate were evident as early as 4 months of age and progressively increased through 12 months of age, the terminal endpoint of this study. Prostatic collagen density and phosphorylated SMAD2-positive prostatic stromal cells were expansive and accumulated with age, consistent with pro-fibrotic TGF-β pathway activation. Few reported mouse models accumulate prostate-specific collagen to the degree observed in Pbsn-cre4Prb;PI3KGOF/+ . Our results indicate a signaling process beginning with prostatic epithelial PI3K and TGF-β signaling that drives prostatic stromal hypertrophy and collagen accumulation. These mice afford a unique opportunity to explore molecular mechanisms of prostatic collagen accumulation that is relevant to cancer progression, metastasis, inflammation and urinary dysfunction. © 2019 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Kyle A Wegner
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI, USA.,University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Brett R Mueller
- University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Christopher J Unterberger
- University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
| | - Enrique J Avila
- University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
| | - Hannah Ruetten
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Anne E Turco
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI, USA.,University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Steven R Oakes
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA.,Department of Biomedical Engineering, College of Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Nicholas M Girardi
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Richard B Halberg
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin-Madison, Madison, WI, USA.,Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Steven M Swanson
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
| | - Paul C Marker
- University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
| | - Chad M Vezina
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI, USA.,University of Wisconsin-Madison/UMASS Boston George M. O'Brien Center for Benign Urologic Research, Madison, WI, USA.,Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA.,School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
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12
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Abstract
The PI3K/AKT/mTOR pathway is frequently activated in various human cancers and has been considered a promising therapeutic target. Many of the positive regulators of the PI3K/AKT/mTOR axis, including the catalytic (p110α) and regulatory (p85α), of class IA PI3K, AKT, RHEB, mTOR, and eIF4E, possess oncogenic potentials, as demonstrated by transformation assays in vitro and by genetically engineered mouse models in vivo. Genetic evidences also indicate their roles in malignancies induced by activation of the upstream oncoproteins including receptor tyrosine kinases and RAS and those induced by the loss of the negative regulators of the PI3K/AKT/mTOR pathway such as PTEN, TSC1/2, LKB1, and PIPP. Possible mechanisms by which the PI3K/AKT/mTOR axis contributes to oncogenic transformation include stimulation of proliferation, survival, metabolic reprogramming, and invasion/metastasis, as well as suppression of autophagy and senescence. These phenotypic changes are mediated by eIF4E-induced translation of a subset of mRNAs and by other downstream effectors of mTORC1 including S6K, HIF-1α, PGC-1α, SREBP, and ULK1 complex.
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13
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Khan N, Jajeh F, Eberhardt EL, Miller DD, Albrecht DM, Van Doorn R, Hruby MD, Maresh ME, Clipson L, Mukhtar H, Halberg RB. Fisetin and 5-fluorouracil: Effective combination for PIK3CA-mutant colorectal cancer. Int J Cancer 2019; 145:3022-3032. [PMID: 31018249 DOI: 10.1002/ijc.32367] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 04/12/2019] [Accepted: 04/17/2019] [Indexed: 12/16/2022]
Abstract
The normal colon epithelium is transformed into its neoplastic counterpart through a series of genetic alterations in driver genes including activating mutations in PIK3CA. Treatment often involves surgery followed by 5-fluorouracil (5-FU) based therapy, which has limited efficiency and serious side effects. We sought to determine whether fisetin, a dietary flavonoid, alone or in combination with 5-FU affected tumorigenesis in the mammalian intestine. We first determined the effect of fisetin, 5-FU or their combination on PIK3CA-mutant and PIK3CA wild-type colon cancer cells by assessing cell viability, colony formation, apoptosis and effects on PI3K/AKT/mTOR signaling. Treatment of PIK3CA-mutant cells with fisetin and 5-FU reduced the expression of PI3K, phosphorylation of AKT, mTOR, its target proteins, constituents of mTOR signaling complex and this treatment increased the phosphorylation of AMPKα. We then determined whether fisetin and 5-FU together or singly affected tumorigenesis in ApcMin/+ mice that also express constitutively active PI3K in the distal small intestine and colon. Tumor incidence was markedly lower in fisetin-treated FC1 3K1 ApcMin/+ mice that also express constitutively active PI3K in distal small intestine and colon, as compared to control animals, indicating that fisetin is a strong preventive agent. In addition, the combination of fisetin and 5-FU also reduced the total number of intestinal tumors. Fisetin could be used as a preventive agent plus an adjuvant with 5-FU for the treatment of PIK3CA-mutant colorectal cancer.
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Affiliation(s)
- Naghma Khan
- Department of Dermatology, University of Wisconsin-Madison, Madison, WI.,University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Farah Jajeh
- Department of Dermatology, University of Wisconsin-Madison, Madison, WI
| | - Emily L Eberhardt
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI
| | - Devon D Miller
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI
| | - Dawn M Albrecht
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI
| | - Rachel Van Doorn
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI
| | - Melissa D Hruby
- Department of Dermatology, University of Wisconsin-Madison, Madison, WI
| | - Morgan E Maresh
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI
| | - Linda Clipson
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin-Madison, Madison, WI
| | - Hasan Mukhtar
- Department of Dermatology, University of Wisconsin-Madison, Madison, WI.,University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Richard B Halberg
- University of Wisconsin Carbone Cancer Center, Madison, WI.,Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, WI.,Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin-Madison, Madison, WI
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14
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Mitchell CB, Phillips WA. Mouse Models for Exploring the Biological Consequences and Clinical Significance of PIK3CA Mutations. Biomolecules 2019; 9:biom9040158. [PMID: 31018529 PMCID: PMC6523081 DOI: 10.3390/biom9040158] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/18/2019] [Accepted: 04/19/2019] [Indexed: 12/15/2022] Open
Abstract
The phosphatidylinositol 3-kinase (PI3K) pathway is involved in a myriad of cellular signalling pathways that regulate cell growth, metabolism, proliferation and survival. As a result, alterations in the PI3K pathway are frequently associated with human cancers. Indeed, PIK3CA-the gene encoding the p110α catalytic subunit of PI3K-is one of the most commonly mutated human oncogenes. PIK3CA mutations have also been implicated in non-malignant conditions including congenital overgrowth syndromes and vascular malformations. In order to study the role of PIK3CA mutations in driving tumorigenesis and tissue overgrowth and to test potential therapeutic interventions for these conditions, model systems are essential. In this review we discuss the various mouse models currently available for preclinical studies into the biological consequences and clinical significance of PIK3CA mutations.
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Affiliation(s)
| | - Wayne A Phillips
- Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia.
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC 3010, Australia.
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15
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Cappellesso R, Lo Mele M, Munari G, Rosa-Rizzotto E, Guido E, De Lazzari F, Pilati P, Tonello M, Farinati F, Realdon S, Fassan M, Rugge M. Molecular characterization of "sessile serrated" adenoma to carcinoma transition in six early colorectal cancers. Pathol Res Pract 2019; 215:957-962. [PMID: 30738693 DOI: 10.1016/j.prp.2019.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/21/2019] [Accepted: 02/01/2019] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is a heterogeneous group of diseases both from the morphological and molecular point of view. The sessile serrated adenoma/polyp (SSA/P) has been proposed as the precursor lesion of CRCs characterized by CpG island methylator phenotype (CIMP), DNA mismatch repair (MMR) system deficiency, and BRAF gene mutations. However, no study so far investigated the molecular landscape of "sessile serrated" adenoma to carcinoma transition in early CRCs. Six formalin-fixed paraffin-embedded CRCs developed within SSA/P were profiled for the immunohistochemical expression of MMR proteins (MLH1, MSH2, MSH6, PMS2, and Ep-CAM), p16, and β-catenin. DNA was extracted from the two components of each sample, after microdissection, and characterized for CIMP status and by applying a custom hotspot multigene mutational profiling of 164 hotspot regions of eleven CRC-associated genes (AKT1, APC, BRAF, CTNNB1, KIT, KRAS, NRAS, PDGFRA, PIK3CA, PTEN, and TP53). Five out of the six CRCs shared the same molecular profile (i.e. CIMP positive, MSI status, and BRAF mutation) with their SSA/P components. One out of five CRCs was also APC mutated, whereas another one showed an additional TP53 mutation. The remaining case was CIMP negative and MMR proficient in both the components, harbored a BRAF mutation in the SSA/P counterpart, whereas the CRC one was APC and TP53 mutated and showed p16 and β-catenin dysregulation. This study provides the molecular evidence that SSA/P, even without cytological dysplasia, is a precursor lesion of CRC and that conventional CRC might arise from mixed polyp.
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Affiliation(s)
- Rocco Cappellesso
- Department of Medicine (DIMED), Surgical Pathology Unit, University of Padua, Padua, 35121, Italy
| | - Marcello Lo Mele
- Department of Medicine (DIMED), Surgical Pathology Unit, University of Padua, Padua, 35121, Italy
| | - Giada Munari
- Department of Medicine (DIMED), Surgical Pathology Unit, University of Padua, Padua, 35121, Italy; Veneto Institute of Oncology - I.R.C.S.S, Padua, 35128, Italy
| | | | - Ennio Guido
- Gastroenterology Unit, S. Antonio Hospital, Padua, 35128, Italy
| | | | - Pierluigi Pilati
- Unit of Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology - I.R.C.S.S, Padua, 35128, Italy
| | - Marco Tonello
- Unit of Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology - I.R.C.S.S, Padua, 35128, Italy; Department of Surgery, Oncology and Gastroenterology (DISCOG), University of Padua, Padua, 35128, Italy
| | - Fabio Farinati
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University of Padua, Padua, 35128, Italy
| | - Stefano Realdon
- Unit of Digestive Endoscopy, Veneto Institute of Oncology - I.R.C.S.S, Padua, 35128, Italy
| | - Matteo Fassan
- Department of Medicine (DIMED), Surgical Pathology Unit, University of Padua, Padua, 35121, Italy.
| | - Massimo Rugge
- Department of Medicine (DIMED), Surgical Pathology Unit, University of Padua, Padua, 35121, Italy
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16
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Fricke SL, Payne SN, Favreau PF, Kratz JD, Pasch CA, Foley TM, Yueh AE, Van De Hey DR, Depke MG, Korkos DP, Sha GC, DeStefanis RA, Clipson L, Burkard ME, Lemmon KK, Parsons BM, Kenny PA, Matkowskyj KA, Newton MA, Skala MC, Deming DA. MTORC1/2 Inhibition as a Therapeutic Strategy for PIK3CA Mutant Cancers. Mol Cancer Ther 2019; 18:346-355. [PMID: 30425131 PMCID: PMC6363831 DOI: 10.1158/1535-7163.mct-18-0510] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 09/20/2018] [Accepted: 11/08/2018] [Indexed: 12/30/2022]
Abstract
PIK3CA mutations are common in clinical molecular profiling, yet an effective means to target these cancers has yet to be developed. MTORC1 inhibitors are often used off-label for patients with PIK3CA mutant cancers with only limited data to support this approach. Here we describe a cohort of patients treated with cancers possessing mutations activating the PI3K signaling cascade with minimal benefit to treatment with the MTORC1 inhibitor everolimus. Previously, we demonstrated that dual PI3K/mTOR inhibition could decrease proliferation, induce differentiation, and result in a treatment response in APC and PIK3CA mutant colorectal cancer. However, reactivation of AKT was identified, indicating that the majority of the benefit may be secondary to MTORC1/2 inhibition. TAK-228, an MTORC1/2 inhibitor, was compared with dual PI3K/mTOR inhibition using BEZ235 in murine colorectal cancer spheroids. A reduction in spheroid size was observed with TAK-228 and BEZ235 (-13% and -14%, respectively) compared with an increase of >200% in control (P < 0.001). These spheroids were resistant to MTORC1 inhibition. In transgenic mice possessing Pik3ca and Apc mutations, BEZ235 and TAK-228 resulted in a median reduction in colon tumor size of 19% and 20%, respectively, with control tumors having a median increase of 18% (P = 0.02 and 0.004, respectively). This response correlated with a decrease in the phosphorylation of 4EBP1 and RPS6. MTORC1/2 inhibition is sufficient to overcome resistance to everolimus and induce a treatment response in PIK3CA mutant colorectal cancers and deserves investigation in clinical trials and in future combination regimens.
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Affiliation(s)
- Stephanie L Fricke
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Susan N Payne
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
| | | | - Jeremy D Kratz
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Cheri A Pasch
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
| | - Tyler M Foley
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Alexander E Yueh
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Dana R Van De Hey
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Mitchell G Depke
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Demetra P Korkos
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Gioia Chengcheng Sha
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Rebecca A DeStefanis
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Linda Clipson
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Mark E Burkard
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
| | - Kayla K Lemmon
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
| | | | | | - Kristina A Matkowskyj
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, Wisconsin
- William S Middleton Memorial Veterans Hospital, Madison, Wisconsin
| | - Michael A Newton
- Department of Statistics and Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Melissa C Skala
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
- Morgridge Institute for Research, Madison, Wisconsin
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin
| | - Dustin A Deming
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
- University of Wisconsin Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, Wisconsin
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17
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Shin MK, Payne S, Bilger A, Matkowskyj KA, Carchman E, Meyer DS, Bentires-Alj M, Deming DA, Lambert PF. Activating Mutations in Pik3ca Contribute to Anal Carcinogenesis in the Presence or Absence of HPV-16 Oncogenes. Clin Cancer Res 2018; 25:1889-1900. [PMID: 30530704 DOI: 10.1158/1078-0432.ccr-18-2843] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/23/2018] [Accepted: 12/04/2018] [Indexed: 12/21/2022]
Abstract
PURPOSE Over 95% of human anal cancers are etiologically associated with high-risk HPVs, with HPV type 16 (HPV16) the genotype most commonly found. Activating mutations in the catalytic subunit of Phosphatidylinositol (3,4,5)-trisphosphate kinase (PI3K), encoded by the Pik3ca gene, are detected in approximately 20% of human anal cancers.Experimental Design: We asked if common activating mutations in Pik3ca contribute to anal carcinogenesis using an established mouse model for anal carcinogenesis in which mice are topically treated with the chemical carcinogen 7,12-Dimethylbenz(a)anthracene (DMBA). Mice expressing in their anal epithelium one of two activating mutations in Pik3ca genes, Pik3caH1047R or Pik3caE545K , were monitored for anal carcinogenesis in the presence or absence of transgenes expressing the HPV16 E6 and E7 oncogenes. RESULTS Both mutant forms of Pik3ca increased susceptibility to anal carcinogenesis in the absence of HPV16 oncogenes, and cooperated with HPV16 oncogenes to induce the highest level and earliest onset of anal cancers. The combination of HPV16 oncogenes and Pik3ca mutations led to anal cancers even in the absence of treatment with DMBA. We further observed that the investigational mTOR1/2 dual inhibitor, TAK-228, significantly reduced the size of anal cancer-derived tumor spheroids in vitro and reduced the growth rates of anal cancer-derived tumor grafts in vivo. CONCLUSIONS These data demonstrate that activating mutations in Pik3ca drive anal carcinogenesis together with HPV16 oncogenes, and that the PI3K/mTOR pathway is a relevant target for therapeutic intervention.
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Affiliation(s)
- Myeong-Kyun Shin
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Susan Payne
- Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Andrea Bilger
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Kristina A Matkowskyj
- Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Department of Pathology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Evie Carchman
- Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Dominique S Meyer
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Mohamed Bentires-Alj
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.,Department of Biomedicine, University of Basel, University Hospital Basel, Basel, Switzerland
| | - Dustin A Deming
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Paul F Lambert
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin. .,Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
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18
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Dosil MA, Navaridas R, Mirantes C, Tarragona J, Eritja N, Felip I, Urdanibia I, Megino C, Domingo M, Santacana M, Gatius S, Piñol C, Barceló C, Maiques O, Macià A, Velasco A, Vaquero M, Matias-Guiu X, Dolcet X. Tumor suppressive function of E2F-1 on PTEN-induced serrated colorectal carcinogenesis. J Pathol 2018; 247:72-85. [DOI: 10.1002/path.5168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 08/22/2018] [Accepted: 09/04/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Maria A Dosil
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
| | - Raúl Navaridas
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Cristina Mirantes
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Jordi Tarragona
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
| | - Núria Eritja
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
| | - Isidre Felip
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Izaskun Urdanibia
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Cristina Megino
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Mónica Domingo
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Maria Santacana
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
| | - Sònia Gatius
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
| | - Carme Piñol
- Department de Medicina; Universitat de Lleida-Institut de Recerca Biomèdica de Lleida (IRBLleida); Lleida Spain
| | - Carla Barceló
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Oscar Maiques
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Anna Macià
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
| | - Ana Velasco
- Department of Pathology and Molecular Genetics; Hospital Universitari Arnau de Vilanova, University of Lleida, IRBLleida; Lleida Spain
| | - Marta Vaquero
- Department of Pathology and Molecular Genetics; Hospital Universitari Arnau de Vilanova, University of Lleida, IRBLleida; Lleida Spain
| | - Xavier Matias-Guiu
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
| | - Xavier Dolcet
- Oncologic Pathology Group, Department de Ciències Mèdiques Bàsiques, Universitat de Lleida, Hospital Universitari Arnau de Vilanova; Institut de Recerca Biomèdica de Lleida, IRBLleida; Lleida Spain
- Centro de Investigación Biomédica en Red de Oncología (CIBERONC); Madrid Spain
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19
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Testa U, Pelosi E, Castelli G. Colorectal cancer: genetic abnormalities, tumor progression, tumor heterogeneity, clonal evolution and tumor-initiating cells. Med Sci (Basel) 2018; 6:E31. [PMID: 29652830 PMCID: PMC6024750 DOI: 10.3390/medsci6020031] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 03/24/2018] [Accepted: 04/03/2018] [Indexed: 02/08/2023] Open
Abstract
Colon cancer is the third most common cancer worldwide. Most colorectal cancer occurrences are sporadic, not related to genetic predisposition or family history; however, 20-30% of patients with colorectal cancer have a family history of colorectal cancer and 5% of these tumors arise in the setting of a Mendelian inheritance syndrome. In many patients, the development of a colorectal cancer is preceded by a benign neoplastic lesion: either an adenomatous polyp or a serrated polyp. Studies carried out in the last years have characterized the main molecular alterations occurring in colorectal cancers, showing that the tumor of each patient displays from two to eight driver mutations. The ensemble of molecular studies, including gene expression studies, has led to two proposed classifications of colorectal cancers, with the identification of four/five non-overlapping groups. The homeostasis of the rapidly renewing intestinal epithelium is ensured by few stem cells present at the level of the base of intestinal crypts. Various experimental evidence suggests that colorectal cancers may derive from the malignant transformation of intestinal stem cells or of intestinal cells that acquire stem cell properties following malignant transformation. Colon cancer stem cells seem to be involved in tumor chemoresistance, radioresistance and relapse.
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Affiliation(s)
- Ugo Testa
- Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, 00161 Rome, Italy.
| | - Elvira Pelosi
- Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, 00161 Rome, Italy.
| | - Germana Castelli
- Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, 00161 Rome, Italy.
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20
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Romano G, Chagani S, Kwong LN. The path to metastatic mouse models of colorectal cancer. Oncogene 2018; 37:2481-2489. [DOI: 10.1038/s41388-018-0155-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/28/2017] [Accepted: 01/02/2018] [Indexed: 02/07/2023]
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21
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The somatic POLE P286R mutation defines a unique subclass of colorectal cancer featuring hypermutation, representing a potential genomic biomarker for immunotherapy. Oncotarget 2018; 7:68638-68649. [PMID: 27612425 PMCID: PMC5356579 DOI: 10.18632/oncotarget.11862] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 08/24/2016] [Indexed: 12/18/2022] Open
Abstract
Early-onset colorectal cancers (EOCRCs) may have biological or genomic features distinct from late-onset CRCs (LOCRCs). Previous studies have mostly focused on the germline predisposition conditions of EOCRCs, but we hypothesized that EOCRCs may have distinct somatic aberrations that accelerate cancer development. To identify the somatic aberrations that accelerate cancer development at an early age, we conducted whole exome sequencing for 28 polyposis-unrelated, microsatellite stable (MSS) EOCRCs with no known germline predisposition conditions. Surprisingly, we found two distinct groups in the context of mutational burden: 6 hypermutated cases with 2325 to 10973 mutations and 22 nonhypermutated cases with 47 to 154 mutations. Further analysis revealed that four of the six hypermutated cases had the same POLE P286R mutation. We validated this finding in 83 MSS EOCRCs and 27 MSS LOCRCs, which revealed that 7.2% of EOCRCs (6/83) had the POLE P286R mutation, which was not found in LOCRCs. Clinicopathologically, EOCRCs with POLE mutations occurred far more frequently in the right colon than in the left colon, affecting men more frequently than women. In summary, we have identified a unique subclass of colon cancer characterized by a hypermutation associated with the POLE mutation. The acquisition of the POLE mutation leading to hypermutation can accelerate cancer development. Clinically, this subset with hypermutation may be susceptible to immune checkpoint blockade.
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22
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Wegner KA, Cadena MT, Trevena R, Turco AE, Gottschalk A, Halberg RB, Guo J, McMahon JA, McMahon AP, Vezina CM. An immunohistochemical identification key for cell types in adult mouse prostatic and urethral tissue sections. PLoS One 2017; 12:e0188413. [PMID: 29145476 PMCID: PMC5690684 DOI: 10.1371/journal.pone.0188413] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 11/06/2017] [Indexed: 02/07/2023] Open
Abstract
Though many methods can be used to identify cell types contained in complex tissues, most require cell disaggregation and destroy information about where cells reside in relation to their microenvironment. Here, we describe a polytomous key for cell type identification in intact sections of adult mouse prostate and prostatic urethra. The key is organized as a decision tree and initiates with one round of immunostaining for nerve, epithelial, fibromuscular/hematolymphoid, or vascular associated cells. Cell identities are recursively eliminated by subsequent staining events until the remaining pool of potential cell types can be distinguished by direct comparison to other cells. We validated our identification key using wild type adult mouse prostate and urethra tissue sections and it currently resolves sixteen distinct cell populations which include three nerve fiber types as well as four epithelial, five fibromuscular/hematolymphoid, one nerve-associated, and three vascular-associated cell types. We demonstrate two uses of this novel identification methodology. We first used the identification key to characterize prostate stromal cell type changes in response to constitutive phosphatidylinositide-3-kinase activation in prostate epithelium. We then used the key to map cell lineages in a new reporter mouse strain driven by Wnt10aem1(cre/ERT2)Amc. The identification key facilitates rigorous and reproducible cell identification in prostate tissue sections and can be expanded to resolve additional cell types as new antibodies and other resources become available.
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Affiliation(s)
- Kyle A. Wegner
- George M. O’Brien Benign Urology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Mark T. Cadena
- George M. O’Brien Benign Urology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Ryan Trevena
- George M. O’Brien Benign Urology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Anne E. Turco
- George M. O’Brien Benign Urology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Adam Gottschalk
- School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Richard B. Halberg
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jinjin Guo
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad-CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States of America
| | - Jill A. McMahon
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad-CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States of America
| | - Andrew P. McMahon
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad-CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States of America
| | - Chad M. Vezina
- George M. O’Brien Benign Urology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
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23
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Gu M, Nishihara R, Chen Y, Li W, Shi Y, Masugi Y, Hamada T, Kosumi K, Liu L, da Silva A, Nowak JA, Twombly T, Du C, Koh H, Li W, Meyerhardt JA, Wolpin BM, Giannakis M, Aguirre AJ, Bass AJ, Drew DA, Chan AT, Fuchs CS, Qian ZR, Ogino S. Aspirin exerts high anti-cancer activity in PIK3CA-mutant colon cancer cells. Oncotarget 2017; 8:87379-87389. [PMID: 29152088 PMCID: PMC5675640 DOI: 10.18632/oncotarget.20972] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/31/2017] [Indexed: 12/12/2022] Open
Abstract
Evidence suggests that nonsteroidal anti-inflammatory drug aspirin (acetylsalicylic acid) may improve patient survival in PIK3CA-mutant colorectal carcinoma, but not in PIK3CA-wild-type carcinoma. However, whether aspirin directly influences the viability of PIK3CA-mutant colon cancer cells is poorly understood. We conducted in vitro experiments to test our hypothesis that the anti-proliferative activity of aspirin might be stronger for PIK3CA-mutant colon cancer cells than for PIK3CA-wild-type colon cancer cells. We measured the anti-proliferative effect of aspirin at physiologic concentrations in seven PIK3CA-mutant and six PIK3CA-wild-type human colon cancer cell lines. After exposure to aspirin, the apoptotic index and cell cycle phase of colon cancer cells were assessed. In addition, the effect of aspirin was examined in parental SW48 cells and SW48 cell clones with individual knock-in PIK3CA mutations of either c.3140A>G (p.H1047R) or c.1633G>A (p.E545K). Aspirin induced greater dose-dependent loss of cell viability in PIK3CA-mutant cells than in PIK3CA-wild-type cells after treatment for 48 and 72 hours. Aspirin treatment also led to higher proportions of apoptotic cells and G0/G1 phase arrest in PIK3CA-mutant cells than in PIK3CA-wild-type cells. Aspirin treatment of isogenic SW48 cells carrying a PIK3CA mutation, either c.3140A>G (p.H1047R) or c.1633G>A (p. E545K), resulted in a more significant loss of cell viability compared to wild-type controls. Our findings indicate that aspirin causes cell cycle arrest, induces apoptosis, and leads to loss of cell viability more profoundly in PIK3CA-mutated colon cancer cells than in PIK3CA-wild-type colon cancer cells. These findings support the use of aspirin to treat patients with PIK3CA-mutant colon cancer.
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Affiliation(s)
- Mancang Gu
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,College of Pharmacy, Zhejiang Chinese Medical University, Hangzhou, P.R. China
| | - Reiko Nishihara
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Yang Chen
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Medical Oncology Department 2, Chinese People's Liberation Army General Hospital, Beijing, P.R. China
| | - Wanwan Li
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Yan Shi
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Medical Oncology Department 2, Chinese People's Liberation Army General Hospital, Beijing, P.R. China
| | - Yohei Masugi
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Tsuyoshi Hamada
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Keisuke Kosumi
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Li Liu
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Annacarolina da Silva
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Jonathan A Nowak
- Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Tyler Twombly
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Chunxia Du
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Hideo Koh
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Wenbin Li
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Jeffrey A Meyerhardt
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Brian M Wolpin
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Marios Giannakis
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Andrew J Aguirre
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Adam J Bass
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA, USA.,Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - David A Drew
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA
| | - Andrew T Chan
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA
| | - Charles S Fuchs
- Yale Cancer Center, New Haven, CT, USA.,Department of Medicine, Yale School of Medicine, New Haven, CT, USA.,Smilow Cancer Hospital, New Haven, CT, USA
| | - Zhi Rong Qian
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Shuji Ogino
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
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24
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Sievers CK, Grady WM, Halberg RB, Pickhardt PJ. New insights into the earliest stages of colorectal tumorigenesis. Expert Rev Gastroenterol Hepatol 2017; 11:723-729. [PMID: 28503955 PMCID: PMC5859121 DOI: 10.1080/17474124.2017.1330150] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Tumors in the large intestine have been postulated to arise via a stepwise accumulation of mutations, a process that takes up to 20 years. Recent advances in lineage tracing and DNA sequencing, however, are revealing new evolutionary models that better explain the vast amount of heterogeneity observed within and across colorectal tumors. Areas covered: A review of the literature supporting a novel model of colorectal tumor evolution was conducted. The following commentary examines the basic science and clinical evidence supporting a modified view of tumor initiation and progression in the colon. Expert commentary: The proposed 'cancer punctuated equilibrium' model of tumor evolution better explains the variability seen within and across polyps of the colon and rectum. Small colorectal polyps (6-9mm) followed longitudinally by interval imaging with CT colonography have been reported to have multiple fates: some growing, some remaining static in size, and others regressing in size over time. This new model allows for this variability in growth behavior and supports the hypothesis that some tumors can be 'born to be bad' as originally postulated by Sottoriva and colleagues, with very early molecular events impacting tumor fitness and growth behavior in the later stages of the disease process.
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Affiliation(s)
- Chelsie K. Sievers
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA; Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - William M. Grady
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA; Department of Medicine, University of Washington Medical School, Seattle, WA
| | - Richard B. Halberg
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA; Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA,Carbone Cancer Center, University of Wisconsin - Madison, Madison, Wisconsin, USA
| | - Perry J. Pickhardt
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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25
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Tabrizian T, Wang D, Guan F, Hu Z, Beck AP, Delahaye F, Huffman DM. Apc inactivation, but not obesity, synergizes with Pten deficiency to drive intestinal stem cell-derived tumorigenesis. Endocr Relat Cancer 2017; 24:253-265. [PMID: 28351943 PMCID: PMC5505256 DOI: 10.1530/erc-16-0536] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 03/28/2017] [Indexed: 12/13/2022]
Abstract
Obesity is a major risk factor for colorectal cancer and can accelerate Lgr5+ intestinal stem cell (ISC)-derived tumorigenesis after the inactivation of Apc However, whether non-canonical pathways involving PI3K-Akt signaling in ISCs can lead to tumor formation, and if this can be further exacerbated by obesity is unknown. Despite the synergy between Pten and Apc inactivation in epithelial cells on intestinal tumor formation, their combined role in Lgr5+-ISCs, which are the most rapidly dividing ISC population in the intestine, is unknown. Lgr5+-GFP mice were provided low-fat diet (LFD) or high-fat diet (HFD) for 8 months, and the transcriptome was evaluated in Lgr5+-ISCs. For tumor studies, Lgr5+-GFP and Lgr5+-GFP-Ptenflox/flox mice were tamoxifen treated to inactivate Pten in ISCs and provided LFD or HFD until 14-15 months of age. Finally, various combinations of Lgr5+-ISC-specific, Apc- and Pten-deleted mice were generated and evaluated for histopathology and survival. HFD did not overtly alter Akt signaling in ISCs, but did increase other metabolic pathways. Pten deficiency, but not HFD, increased BrdU-positive cells in the small intestine (P < 0.05). However, combining Pten and Apc deficiency synergistically increased proliferative markers, tumor pathology and mortality, in a dose-dependent fashion (P < 0.05). In summary, we show that HFD alone fails to drive Akt signaling in ISCs and that Pten deficiency is dispensable as a tumor suppressor in Lgr5+-ISCs. However, combining Pten and Apc deficiency in ISCs synergistically increases proliferation, tumor formation and mortality. Thus, aberrant Wnt/β-catenin, rather than PI3K-Akt signaling, is requisite for obesity to drive Lgr5+ ISC-derived tumorigenesis.
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Affiliation(s)
- Tahmineh Tabrizian
- Department of Molecular PharmacologyAlbert Einstein College of Medicine, Bronx, New York, USA
- Institute for Aging ResearchAlbert Einstein College of Medicine, Bronx, New York, USA
| | - Donghai Wang
- Department of Molecular PharmacologyAlbert Einstein College of Medicine, Bronx, New York, USA
- Institute for Aging ResearchAlbert Einstein College of Medicine, Bronx, New York, USA
- Division of EndocrinologyDepartment of Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Fangxia Guan
- Department of Molecular PharmacologyAlbert Einstein College of Medicine, Bronx, New York, USA
- Institute for Aging ResearchAlbert Einstein College of Medicine, Bronx, New York, USA
- Division of EndocrinologyDepartment of Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Zunju Hu
- Department of Molecular PharmacologyAlbert Einstein College of Medicine, Bronx, New York, USA
- Institute for Aging ResearchAlbert Einstein College of Medicine, Bronx, New York, USA
- Division of EndocrinologyDepartment of Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Amanda P Beck
- Department of Obstetrics & Gynecology and Women's HealthAlbert Einstein College of Medicine, Bronx, New York, USA
| | - Fabien Delahaye
- Department of GeneticsAlbert Einstein College of Medicine, Bronx, New York, USA
- Department of PathologyAlbert Einstein College of Medicine, Bronx, New York, USA
| | - Derek M Huffman
- Department of Molecular PharmacologyAlbert Einstein College of Medicine, Bronx, New York, USA
- Institute for Aging ResearchAlbert Einstein College of Medicine, Bronx, New York, USA
- Division of EndocrinologyDepartment of Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
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26
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Jung KS, Lee J, Park SH, Park JO, Park YS, Lim HY, Kang WK, Kim ST. Pilot study of sirolimus in patients with PIK3CA mutant/amplified refractory solid cancer. Mol Clin Oncol 2017; 7:27-31. [PMID: 28685070 PMCID: PMC5492817 DOI: 10.3892/mco.2017.1272] [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: 10/07/2016] [Accepted: 04/04/2017] [Indexed: 12/29/2022] Open
Abstract
In patients with refractory cancer, the effect of additional chemotherapy is very limited. Targeted agents for molecular pathways associated with cancer cell progression and survival have emerged as attractive options in several cancer types. The current pilot study assessed the efficacy and safety of sirolimus in patients with refractory cancer with PIK3CA mutation/amplification. Refractory cancer patients with PIK3CA mutation/amplification were enrolled, irrespective of tumor-types. Enrolled patients received a daily dose of 1 mg sirolimus and one cycle defined as 28 days. An assessment of the efficacy and safety of sirolimus was performed. Overall, 4 patients were enrolled between October 2014 and April 2015. The median of 2.5 cycles of sirolimus was administered. Three patients had advanced gastric cancer and one had advanced cholangiocarcinoma. The overall response rate was 0%, three patients (75%) had stable disease following one cycle and one patient (25%) received sirolimus for 4 cycles without disease progression. The median progression free survival was 1.9 months [95% confidence interval (CI), 0.3–3.5 months], and the median overall survival was 3.6 months (95% CI, 0.4–6.8 months). Grade 3 or greater hematologic/non-hematologic toxicity was not observed. Grade 1 nausea was reported in one patient each. There were no treatment-associated mortalities. Sirolimus had modest efficacy and a tolerable toxicity-profile in patients with refractory cancer with PIK3CA mutation/amplification.
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Affiliation(s)
- Ki Sun Jung
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Jeeyun Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Se Hoon Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Joon Oh Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Young Suk Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Ho Yeong Lim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Won Ki Kang
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Seung Tae Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
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Mizutani T, Tsukamoto Y, Clevers H. Oncogene-inducible organoids as a miniature platform to assess cancer characteristics. J Cell Biol 2017; 216:1505-1507. [PMID: 28512141 PMCID: PMC5461034 DOI: 10.1083/jcb.201704014] [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] [Indexed: 01/18/2023] Open
Abstract
Direct effects of oncogenic proteins or inhibitor treatments on signaling pathways are difficult to assess in transgenic mice. In this issue, Riemer et al. (2017. J. Cell Biol. https://doi.org/10.1083/jcb.201610058) demonstrate that oncogene-inducible organoids offer the experimental versatility of two-dimensional cell lines, while closely representing the in vivo situation.
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Affiliation(s)
- Tomohiro Mizutani
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, 3584CT Utrecht, Netherlands
| | - Yoshiyuki Tsukamoto
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, 3584CT Utrecht, Netherlands.,Department of Molecular Pathology, Faculty of Medicine, Oita University, 879-5593 Yufu, Japan
| | - Hans Clevers
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, 3584CT Utrecht, Netherlands
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Riemer P, Rydenfelt M, Marks M, van Eunen K, Thedieck K, Herrmann BG, Blüthgen N, Sers C, Morkel M. Oncogenic β-catenin and PIK3CA instruct network states and cancer phenotypes in intestinal organoids. J Cell Biol 2017; 216:1567-1577. [PMID: 28442534 PMCID: PMC5461020 DOI: 10.1083/jcb.201610058] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 02/08/2017] [Accepted: 03/30/2017] [Indexed: 01/25/2023] Open
Abstract
Colorectal cancer is driven by cooperating oncogenic mutations. In this study, we use organotypic cultures derived from transgenic mice inducibly expressing oncogenic β-catenin and/or PIK3CAH1047R to follow sequential changes in cancer-related signaling networks, intestinal cell metabolism, and physiology in a three-dimensional environment mimicking tissue architecture. Activation of β-catenin alone results in the formation of highly clonogenic cells that are nonmotile and prone to undergo apoptosis. In contrast, coexpression of stabilized β-catenin and PIK3CAH1047R gives rise to intestinal cells that are apoptosis-resistant, proliferative, stem cell-like, and motile. Systematic inhibitor treatments of organoids followed by quantitative phenotyping and phosphoprotein analyses uncover key changes in the signaling network topology of intestinal cells after induction of stabilized β-catenin and PIK3CAH1047R We find that survival and motility of organoid cells are associated with 4EBP1 and AKT phosphorylation, respectively. Our work defines phenotypes, signaling network states, and vulnerabilities of transgenic intestinal organoids as a novel approach to understanding oncogene activities and guiding the development of targeted therapies.
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Affiliation(s)
- Pamela Riemer
- Laboratory of Molecular Tumor Pathology, Institute of Pathology, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany.,German Cancer Consortium, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Mattias Rydenfelt
- Integrative Research Institute Life Sciences, Humboldt University Berlin, 10099 Berlin, Germany
| | - Matthias Marks
- Department of Developmental Genetics, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany
| | - Karen van Eunen
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University Medical Center Groningen, 9713 GZ Groningen, Netherlands
| | - Kathrin Thedieck
- Department of Pediatrics, Center for Liver, Digestive and Metabolic Diseases, University Medical Center Groningen, 9713 GZ Groningen, Netherlands
| | - Bernhard G Herrmann
- Department of Developmental Genetics, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany
| | - Nils Blüthgen
- Laboratory of Molecular Tumor Pathology, Institute of Pathology, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany.,Integrative Research Institute Life Sciences, Humboldt University Berlin, 10099 Berlin, Germany
| | - Christine Sers
- Laboratory of Molecular Tumor Pathology, Institute of Pathology, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany.,German Cancer Consortium, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Markus Morkel
- Laboratory of Molecular Tumor Pathology, Institute of Pathology, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany
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29
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Shia J, Schultz N, Kuk D, Vakiani E, Middha S, Segal NH, Hechtman JF, Berger MF, Stadler ZK, Weiser MR, Wolchok JD, Boland CR, Gönen M, Klimstra DS. Morphological characterization of colorectal cancers in The Cancer Genome Atlas reveals distinct morphology-molecular associations: clinical and biological implications. Mod Pathol 2017; 30:599-609. [PMID: 27982025 PMCID: PMC5380525 DOI: 10.1038/modpathol.2016.198] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 10/19/2016] [Accepted: 10/19/2016] [Indexed: 12/14/2022]
Abstract
The Cancer Genome Atlas data on colorectal carcinoma have provided a comprehensive view of the tumor's genomic alterations and their tumorigenic roles. Tumor morphology, however, has not been fully integrated into the analysis. The aim of this study was to explore relevant associations between tumor morphology and the newly characterized genomic alterations in colorectal carcinoma. Two hundred and seven colorectal carcinomas that had undergone whole-exome sequencing as part of The Cancer Genome Atlas project and had adequate virtual images in the cBioPortal for Cancer Genomics constituted our study population. Upon analysis, a tight association between 'microsatellite instability-high histology' and microsatellite instability-high (P<0.001) was readily detected and helped validate our image-based histology evaluation. Further, we showed, (1) among all histologies, the not otherwise specified type had the lowest overall mutation count (P<0.001 for entire cohort, P<0.03 for the microsatellite-instable group), and among the microsatellite-instable tumors, this type also correlated with fewer frameshift mutations in coding mononucleotide repeats of a defined set of relevant genes (P<0.01); (2) cytosine phosphate guanine island methylator phenotype-high colorectal cancers with or without microsatellite instability tended to have different histological patterns: the former more often mucinous and the latter more often not otherwise specified; (3) mucinous histology was associated with more frequent alterations in BRAF, PIK3CA, and the transforming growth factor-β pathway when compared with non-mucinous histologies (P<0.001, P=0.01, and P<0.001, respectively); and (4) few colorectal cancers (<9%) exhibited upregulation of immune-inhibitory genes including major immune checkpoints; these tumors were primarily microsatellite-instable (up to 43%, vs <3% in microsatellite-stable group) and had distinctly non-mucinous histologies with a solid growth. These morphology-molecular associations are interesting and propose important clinical implications. The morphological patterns associated with alterations of immune checkpoint genes bear the potential to guide patient selection for clinical trials that target immune checkpoints in colorectal cancer, and provide directions for future studies.
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Affiliation(s)
- Jinru Shia
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Nikolaus Schultz
- Computational Biology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Deborah Kuk
- Department of Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Efsevia Vakiani
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Sumit Middha
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Neil H. Segal
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Jaclyn F. Hechtman
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Michael F. Berger
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Zsofia K. Stadler
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Martin R. Weiser
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Jedd D. Wolchok
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY
| | - C. Richard Boland
- GI Cancer Research Laboratory, Baylor University Medical Center; GI Cancer Research Laboratory, Baylor Scott & White Research Institute, Dallas, TX
| | - Mithat Gönen
- Department of Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY
| | - David S. Klimstra
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
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30
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Tai WCS, Wong WY, Lee MML, Chan BD, Lu C, Hsiao WLW. Mechanistic study of the anti-cancer effect of Gynostemma pentaphyllum saponins in the Apc(Min/+) mouse model. Proteomics 2016; 16:1557-69. [PMID: 26970558 DOI: 10.1002/pmic.201500293] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 02/16/2016] [Accepted: 03/06/2016] [Indexed: 01/05/2023]
Abstract
Gynostemma pentaphyllum saponins (GpS) have been shown to have anti-cancer activity. However, the underlying mechanisms remain unclear. In this study, we used the Apc(Min) (/+) colorectal cancer (CRC) mouse model to investigate the anti-cancer effect of GpS and we demonstrated that GpS treatment could significantly reduce the number and size of intestinal polyps in Apc(Min) (/+) mice. In order to identify the potential targets and mechanisms involved, a comparative proteomics analysis was performed and 40 differentially expressed proteins after GpS treatment were identified. Bioinformatics analyses suggested a majority of these proteins were involved in processes related to cellular redox homeostasis, and predicted Raf-1 as a potential target of GpS. The upregulation of two proteins known to be involved in redox homeostasis, peroxiredoxin-1 (Prdx1) and peroxiredoxin-2 (Prdx2), and the downregulation of Raf-1 were validated using Western blot analysis. After further investigation of the associated signaling networks, we postulated that the anti-cancer effect of GpS was mediated through the upregulation of Prdx1 and Prdx2, suppression of Ras, RAF/MEK/ERK/STAT, PI3K/AKT/mTOR signaling and modulation of JNK/p38 MAPK signaling. We also examined the potential combinatorial effect of GpS with the chemotherapeutic 5-fluorouracil (5-FU) and found that GpS could enhance the anti-cancer efficacy of 5-FU, further suppressing the number of polyps in Apc(Min/+) mice. Our findings highlight the potential of GpS as an anti-cancer agent, the potential mechanisms of its anti-cancer activities, and its effect as an adjuvant of 5-FU in the chemotherapy of CRC.
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Affiliation(s)
- William Chi-Shing Tai
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, P. R. China
| | - Wing-Yan Wong
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, P. R. China
| | - Magnolia Muk-Lan Lee
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, P. R. China
| | - Brandon Dow Chan
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, P. R. China
| | - Cheng Lu
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, P. R. China
| | - Wen-Luan Wendy Hsiao
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau, P. R. China
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31
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Tattoli I, Killackey SA, Foerster EG, Molinaro R, Maisonneuve C, Rahman MA, Winer S, Winer DA, Streutker CJ, Philpott DJ, Girardin SE. NLRX1 Acts as an Epithelial-Intrinsic Tumor Suppressor through the Modulation of TNF-Mediated Proliferation. Cell Rep 2016; 14:2576-86. [PMID: 26971996 DOI: 10.1016/j.celrep.2016.02.065] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 02/08/2016] [Accepted: 02/22/2016] [Indexed: 01/10/2023] Open
Abstract
The mitochondrial Nod-like receptor protein NLRX1 protects against colorectal tumorigenesis through mechanisms that remain unclear. Using mice with an intestinal epithelial cells (IEC)-specific deletion of Nlrx1, we find that NLRX1 provides an IEC-intrinsic protection against colitis-associated carcinogenesis in the colon. These Nlrx1 mutant mice have increased expression of Tnf, Egf, and Tgfb1, three factors essential for wound healing, as well as increased epithelial proliferation during the epithelial regeneration phase following injury triggered by dextran sodium sulfate. In primary intestinal organoids lacking Nlrx1, stimulation with TNF resulted in exacerbated proliferation and expression of the intestinal stem cell markers Olfm4 and Myb. This hyper-proliferation response was associated with increased activation of Akt and NF-κB pathways in response to TNF stimulation. Together, these results identify NLRX1 as a suppressor of colonic tumorigenesis that acts by controlling epithelial proliferation in the intestine during the regeneration phase following mucosal injury.
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Affiliation(s)
- Ivan Tattoli
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Canada; Department of Immunology, University of Toronto, M5S 1A8 Toronto, Canada
| | - Samuel A Killackey
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Canada
| | | | - Raphael Molinaro
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Canada
| | | | - Muhammed A Rahman
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Canada; Department of Immunology, University of Toronto, M5S 1A8 Toronto, Canada
| | - Shawn Winer
- Department of Pathology, Toronto General Hospital, University of Toronto, M5S 1A8 Toronto, Canada
| | - Daniel A Winer
- Department of Pathology, Toronto General Hospital, University of Toronto, M5S 1A8 Toronto, Canada
| | - Catherine J Streutker
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Canada; Saint Michael's Hospital, University of Toronto, M5S 1A8 Toronto, Canada
| | - Dana J Philpott
- Department of Immunology, University of Toronto, M5S 1A8 Toronto, Canada
| | - Stephen E Girardin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, M5S 1A8 Toronto, Canada.
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Colon Cancer Tumorigenesis Initiated by the H1047R Mutant PI3K. PLoS One 2016; 11:e0148730. [PMID: 26863299 PMCID: PMC4749659 DOI: 10.1371/journal.pone.0148730] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 01/22/2016] [Indexed: 12/30/2022] Open
Abstract
The phosphoinositide 3-kinase (PI3K) signaling pathway is critical for multiple important cellular functions, and is one of the most commonly altered pathways in human cancers. We previously developed a mouse model in which colon cancers were initiated by a dominant active PI3K p110-p85 fusion protein. In that model, well-differentiated mucinous adenocarcinomas developed within the colon and initiated through a non-canonical mechanism that is not dependent on WNT signaling. To assess the potential relevance of PI3K mutations in human cancers, we sought to determine if one of the common mutations in the human disease could also initiate similar colon cancers. Mice were generated expressing the Pik3caH1047R mutation, the analog of one of three human hotspot mutations in this gene. Mice expressing a constitutively active PI3K, as a result of this mutation, develop invasive adenocarcinomas strikingly similar to invasive adenocarcinomas found in human colon cancers. These tumors form without a polypoid intermediary and also lack nuclear CTNNB1 (β-catenin), indicating a non-canonical mechanism of tumor initiation mediated by the PI3K pathway. These cancers are sensitive to dual PI3K/mTOR inhibition indicating dependence on the PI3K pathway. The tumor tissue remaining after treatment demonstrated reduction in cellular proliferation and inhibition of PI3K signaling.
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33
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Jackstadt R, Sansom OJ. Mouse models of intestinal cancer. J Pathol 2016; 238:141-51. [PMID: 26414675 PMCID: PMC4832380 DOI: 10.1002/path.4645] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 09/21/2015] [Accepted: 09/23/2015] [Indexed: 12/19/2022]
Abstract
Murine models of intestinal cancer are powerful tools to recapitulate human intestinal cancer, understand its biology and test therapies. With recent developments identifying the importance of the tumour microenvironment and the potential for immunotherapy, autochthonous genetically engineered mouse models (GEMMs) will remain an important part of preclinical studies for the foreseeable future. This review will provide an overview of the current mouse models of intestinal cancer, from the Apc(Min/+) mouse, which has been used for over 25 years, to the latest 'state-of-the-art' organoid models. We discuss here how these models have been used to define fundamental processes involved in tumour initiation and the attempts to generate metastatic models, which is the ultimate cause of cancer mortality. Together these models will provide key insights to understand this complex disease and hopefully will lead to the discovery of new therapeutic strategies.
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34
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Huang W, Lin J, Zhang H. miR-126: A novel regulator in colon cancer. Biomed Rep 2015; 4:131-134. [PMID: 26893826 DOI: 10.3892/br.2015.549] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 11/25/2015] [Indexed: 12/16/2022] Open
Abstract
Colon cancer is one of the most common, lethal diseases worldwide. Tumor metastasis and chemotherapy resistance are the main reasons for its poor prognosis and high fatality rate. Tumor development is thought of as one of the most complex cellular events as it is a multi-step cascading process involving infinite proliferation, invasion and immigration. Recently, increasing studies have demonstrated that microRNA-126 (miR-126) has an important role in colon cancer. The expression of miR-126 decreased significantly in colon cancer, particularly in highly metastatic cell lines. miR-126 controls tumor cell growth, metastasis and survival via inactivation of the oncogene signaling pathway, indicating that miR-126 may serve as a therapeutic target for anticancer therapy. Potentially, miR-126 was also reported to be an ideal molecular target as a novel biomarker for liver metastasis from colorectal cancer due to its changeable expression level. In the present review, the current knowledge regarding regulatory function of miR-126 is summarized along with its underlying mechanisms in colon cancer.
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Affiliation(s)
- Weina Huang
- The First Clinical Medical College, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Jie Lin
- Department of Pathology, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Hongxuan Zhang
- Department of Critical Care and Emergency, Guangdong General Hospital, Guangdong Academy of Medical Science, Guangdong Geriatric Institute, Guangzhou, Guandong 510080, P.R. China
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35
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Chang SC, Lin PC, Lin JK, Lin CH, Yang SH, Liang WY, Chen WS, Jiang JK. Mutation Spectra of Common Cancer-Associated Genes in Different Phenotypes of Colorectal Carcinoma Without Distant Metastasis. Ann Surg Oncol 2015; 23:849-55. [PMID: 26471487 DOI: 10.1245/s10434-015-4899-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND Colorectal cancer (CRC) is a heterogeneous disease caused by genetic and epigenetic alterations. This study aimed to describe the mutation frequency of 12 genes in different CRC phenotypes. METHODS Patients who underwent surgery at the Taipei Veterans General Hospital during 2000-2010 for CRC (n = 1249) were enrolled. The endpoint was overall survival. The prognostic value was determined with the log-rank test and Cox regression analysis. RESULTS We found 1836 mutations of 12 genes in 997 (79.8%) tumors. Mutations were most frequently in KRAS (485, 38.8%), TP53 (373, 29.9%), APC (363, 29.0%), and PIK3CA (179, 14.3%); 137 (11.0%) cancers had high microsatellite instability (MSI). Women had significantly higher high MSI (14.3%) and BRAF mutation (6.3%) frequencies. The abnormal MSI (21.7%) and KRAS (44.6%), BRAF (8.6%), PIK3CA (19.4%), AKT1 (2.2%), and TGF - βR (9.6%) mutation frequencies were significantly higher in proximal colon cancer. The high MSI (35.6%) and BRAF (20.3%), TGF - βR (18.6%), PTEN (5.1%), and AKT1 (3.4%) mutation frequencies were significantly higher in 59 (4.7%) poorly differentiated tumors. The high MSI (21.3%) and KRAS (51.9%), BRAF (8.3%), PIK3CA (25.0%), AKT1 (4.6%), and SMAD4 (8.3%) mutation frequencies were significantly higher in 108 mucinous tumors. TNM stage, lymphovascular invasion, and mucinous histology were significantly associated with patient outcomes in univariate and multivariate analyses. Only NRAS mutation (hazard ratio 1.59, 95% confidence interval 1.06-2.38) affected patient survival. CONCLUSIONS Mutational spectra differ significantly between CRC subtypes, implying diverse carcinogenetic pathways. The NRAS mutation is important, despite its low frequency.
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Affiliation(s)
- Shih-Ching Chang
- Division of Colon & Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Surgery, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Endoscopy Center for Diagnosis and Treatment, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Pei-Ching Lin
- Department of Clinical Pathology, Yang-Ming Campus, Taipei City Hospital, Taipei, Taiwan
| | - Jen-Kou Lin
- Division of Colon & Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Surgery, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chien-Hsing Lin
- Division of Genomic Medicine, National Health Research Institutes, Zhunan, Taiwan
| | - Shung-Haur Yang
- Division of Colon & Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Surgery, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Wen-Yi Liang
- Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Wei-Shone Chen
- Division of Colon & Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Surgery, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jeng-Kai Jiang
- Division of Colon & Rectal Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan. .,Department of Surgery, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
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36
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PIK3CA mutations can initiate pancreatic tumorigenesis and are targetable with PI3K inhibitors. Oncogenesis 2015; 4:e169. [PMID: 26436951 PMCID: PMC4632089 DOI: 10.1038/oncsis.2015.28] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 08/24/2015] [Indexed: 02/06/2023] Open
Abstract
Aberrations in the phosphoinositide 3-kinase (PI3K) signaling pathway have a key role in the pathogenesis of numerous cancers by altering cell growth, metabolism, proliferation and apoptosis. Interest in targeting the PI3K signaling cascade continues, as new agents are being clinically evaluated. PIK3CA mutations result in a constitutively active PI3K and are present in a subset of pancreatic cancers. Here we examine mutant PIK3CA-mediated pancreatic tumorigenesis and the response of PIK3CA mutant pancreatic cancers to dual PI3K/mammalian target of rapamycin (mTOR) inhibition. Two murine models were generated expressing a constitutively active PI3K within the pancreas. An increase in acinar-to-ductal metaplasia and pancreatic intraepithelial neoplasms (PanINs) was identified. In one model these lesions were detected as early as 10 days of age. Invasive pancreatic ductal adenocarcinoma developed in these mice as early as 20 days of age. These cancers were highly sensitive to treatment with dual PI3K/mTOR inhibition. In the second model, PanINs and invasive cancer develop with a greater latency owing to a lesser degree of PI3K pathway activation in this murine model. In addition to PI3K pathway activation, increased ERK1/2 signaling is common in human pancreatic cancers. Phosphorylation of ERK1/2 was also investigated in these models. Phosphorylation of ERK1/2 is demonstrated in the pre-neoplastic lesions and invasive cancers. This activation of ERK1/2 is diminished with dual PI3K/mTOR inhibition. In summary, PIK3CA mutations can initiate pancreatic tumorigenesis and these cancers are particularly sensitive to dual PI3K/mTOR inhibition. Future studies of PI3K pathway inhibitors for patients with PIK3CA mutant pancreatic cancers are warranted.
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37
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Hadac JN, Leystra AA, Paul Olson TJ, Maher ME, Payne SN, Yueh AE, Schwartz AR, Albrecht DM, Clipson L, Pasch CA, Matkowskyj KA, Halberg RB, Deming DA. Colon Tumors with the Simultaneous Induction of Driver Mutations in APC, KRAS, and PIK3CA Still Progress through the Adenoma-to-carcinoma Sequence. Cancer Prev Res (Phila) 2015; 8:952-61. [PMID: 26276752 DOI: 10.1158/1940-6207.capr-15-0003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 07/15/2015] [Indexed: 02/06/2023]
Abstract
Human colorectal cancers often possess multiple mutations, including three to six driver mutations per tumor. The timing of when these mutations occur during tumor development and progression continues to be debated. More advanced lesions carry a greater number of driver mutations, indicating that colon tumors might progress from adenomas to carcinomas through the stepwise accumulation of mutations following tumor initiation. However, mutations that have been implicated in tumor progression have been identified in normal-appearing epithelial cells of the colon, leaving the possibility that these mutations might be present before the initiation of tumorigenesis. We utilized mouse models of colon cancer to investigate whether tumorigenesis still occurs through the adenoma-to-carcinoma sequence when multiple mutations are present at the time of tumor initiation. To create a model in which tumors could concomitantly possess mutations in Apc, Kras, and Pik3ca, we developed a novel minimally invasive technique to administer an adenovirus expressing Cre recombinase to a focal region of the colon. Here, we demonstrate that the presence of these additional driver mutations at the time of tumor initiation results in increased tumor multiplicity and an increased rate of progression to invasive adenocarcinomas. These cancers can even metastasize to retroperitoneal lymph nodes or the liver. However, despite having as many as three concomitant driver mutations at the time of initiation, these tumors still proceed through the adenoma-to-carcinoma sequence.
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Affiliation(s)
- Jamie N Hadac
- Department of Oncology, University of Wisconsin, Madison, Wisconsin
| | - Alyssa A Leystra
- Department of Oncology, University of Wisconsin, Madison, Wisconsin
| | - Terrah J Paul Olson
- Division of General Surgery, Department of Surgery, University of Wisconsin, Madison, Wisconsin
| | - Molly E Maher
- Division of Hematology and Oncology, University of Wisconsin, Madison, Wisconsin
| | - Susan N Payne
- University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin
| | - Alexander E Yueh
- Division of Hematology and Oncology, University of Wisconsin, Madison, Wisconsin
| | - Alexander R Schwartz
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin, Madison, Wisconsin
| | - Dawn M Albrecht
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin, Madison, Wisconsin
| | - Linda Clipson
- Department of Oncology, University of Wisconsin, Madison, Wisconsin
| | - Cheri A Pasch
- University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin
| | - Kristina A Matkowskyj
- University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin. Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison, Wisconsin. William S Middleton Memorial Veterans Hospital, Madison, Wisconsin
| | - Richard B Halberg
- University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin. Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin, Madison, Wisconsin
| | - Dustin A Deming
- Division of Hematology and Oncology, University of Wisconsin, Madison, Wisconsin. University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin. William S Middleton Memorial Veterans Hospital, Madison, Wisconsin.
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38
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Abstract
Colorectal cancer (CRC) is considered a heterogeneous disease, both regarding pathogenesis and clinical behaviour. Four decades ago, the adenoma-carcinoma pathway was presented as the main pathway towards CRC, a conclusion that was largely based on evidence from observational morphological studies. This concept was later substantiated at the genomic level. Over the past decade, evidence has been generated for alternative routes in which CRC might develop, in particular the serrated neoplasia pathway. Providing indisputable evidence for the neoplastic potential of serrated polyps has been difficult. Reasons include the absence of reliable longitudinal observations on individual serrated lesions that progress to cancer, a shortage of available animal models for serrated lesions and challenging culture conditions when generating organoids of serrated lesions for in vitro studies. However, a growing body of circumstantial evidence has been accumulated, which indicates that ≥15% of CRCs might arise through the serrated neoplasia pathway. An even larger amount of post-colonoscopy colorectal carcinomas (carcinomas occurring within the surveillance interval after a complete colonoscopy) have been suggested to originate from serrated polyps. The aim of this Review is to assess the current status of the serrated neoplasia pathway in CRC and highlight clinical implications.
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39
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Phospholipid ether analogs for the detection of colorectal tumors. PLoS One 2014; 9:e109668. [PMID: 25286226 PMCID: PMC4186834 DOI: 10.1371/journal.pone.0109668] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 09/03/2014] [Indexed: 11/19/2022] Open
Abstract
The treatment of localized colorectal cancer (CRC) depends on resection of the primary tumor with adequate margins and sufficient lymph node sampling. A novel imaging agent that accumulates in CRCs and the associated lymph nodes is needed. Cellectar Biosciences has developed a phospholipid ether analog platform that is both diagnostic and therapeutic. CLR1502 is a near-infrared fluorescent molecule, whereas 124/131I-CLR1404 is under clinical investigation as a PET tracer/therapeutic agent imaged by SPECT. We investigated the use of CLR1502 for the detection of intestinal cancers in a murine model and 131I-CLR1404 in a patient with metastatic CRC. Mice that develop multiple intestinal tumors ranging from adenomas to locally advanced adenocarcinomas were utilized. After 96 hours post CLR1502 injection, the intestinal tumors were analyzed using a Spectrum IVIS (Perkin Elmer) and a Fluobeam (Fluoptics). The intensity of the fluorescent signal was correlated with the histological characteristics for each tumor. Colon adenocarcinomas demonstrated increased accumulation of CLR1502 compared to non-invasive lesions (total radiant efficiency: 1.76×1010 vs 3.27×109 respectively, p = 0.006). Metastatic mesenteric tumors and uninvolved lymph nodes were detected with CLR1502. In addition, SPECT imaging with 131I-CLR1404 was performed as part of a clinical trial in patients with advanced solid tumors. 131I-CLR1404 was shown to accumulate in metastatic tumors in a patient with colorectal adenocarcinoma. Together, these compounds might enhance our ability to properly resect CRCs through better localization of the primary tumor and improved lymph node identification as well as detect distant disease.
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40
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Yu M, Trobridge P, Wang Y, Kanngurn S, Morris SM, Knoblaugh S, Grady WM. Inactivation of TGF-β signaling and loss of PTEN cooperate to induce colon cancer in vivo. Oncogene 2014; 33:1538-47. [PMID: 23604118 PMCID: PMC3883899 DOI: 10.1038/onc.2013.102] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 01/18/2013] [Accepted: 02/01/2013] [Indexed: 12/12/2022]
Abstract
The accumulation of genetic and epigenetic alterations mediates colorectal cancer (CRC) formation by deregulating key signaling pathways in cancer cells. In CRC, one of the most commonly inactivated signaling pathways is the transforming growth factor-beta (TGF-β) signaling pathway, which is often inactivated by mutations of TGF-β type II receptor (TGFBR2). Another commonly deregulated pathway in CRC is the phosphoinositide-3-kinase (PI3K)-AKT pathway. Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) is an important negative regulator of PI3K-AKT signaling and is silenced in ∼30% of CRC. The combination of TGFBR2 inactivation and loss of PTEN is particularly common in microsatellite-unstable CRCs. Consequently, we determined in vivo if deregulation of these two pathways cooperates to affect CRC formation by analyzing tumors arising in mice that lack Tgfbr2 and/or Pten specifically in the intestinal epithelium. We found that lack of Tgfbr2 (Tgfbr2(IEKO)) alone is not sufficient for intestinal tumor formation and lack of Pten (Pten(IEKO)) alone had a weak effect on intestinal tumor induction. However, the combination of Tgfbr2 inactivation with Pten loss (Pten(IEKO);Tgfbr2(IEKO)) led to malignant tumors in both the small intestine and colon in 86% of the mice and to metastases in 8% of the tumor-bearing mice. Moreover, these tumors arose via a β-catenin-independent mechanism. Inactivation of TGF-β signaling and loss of Pten in the tumors led to increased cell proliferation, decreased apoptosis and decreased expression of cyclin-dependent kinase inhibitors. Thus, inactivation of TGF-β signaling and loss of PTEN cooperate to drive intestinal cancer formation and progression by suppressing cell cycle inhibitors.
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Affiliation(s)
- Ming Yu
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | | | - Yuxin Wang
- Department of Microbiology, University of Washington, Seattle, WA
- Department of Medicine, University of Washington, Medical School, Seattle, WA
| | - Samornmas Kanngurn
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Pathology, Prince of Songkla University, Hatyai, Thailand
| | - Shelli M. Morris
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Sue Knoblaugh
- Comparative Medicine, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - William M. Grady
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Medicine, University of Washington, Medical School, Seattle, WA
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41
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Physiological expression of the PI3K-activating mutation Pik3caH1047R combines with Apc loss to promote development of invasive intestinal adenocarcinomas in mice. Biochem J 2014; 458:251-8. [DOI: 10.1042/bj20131412] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We used a novel mouse model to investigate the role of a common PI3K pathway mutation observed in human cancers and demonstrated that when combined with loss of the Apc gene, intestinal tumorigenesis is enhanced compared with Apc loss alone.
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42
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Wong MS, Sidik SM, Mahmud R, Stanslas J. Molecular targets in the discovery and development of novel antimetastatic agents: current progress and future prospects. Clin Exp Pharmacol Physiol 2013; 40:307-19. [PMID: 23534409 DOI: 10.1111/1440-1681.12083] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 03/18/2013] [Accepted: 03/21/2013] [Indexed: 01/08/2023]
Abstract
Tumour invasion and metastasis have been recognized as major causal factors in the morbidity and mortality among cancer patients. Many advances in the knowledge of cancer metastasis have yielded an impressive array of attractive drug targets, including enzymes, receptors and multiple signalling pathways. The present review summarizes the molecular pathogenesis of metastasis and the identification of novel molecular targets used in the discovery of antimetastatic agents. Several promising targets have been highlighted, including receptor tyrosine kinases, effector molecules involved in angiogenesis, matrix metalloproteinases (MMPs), urokinase plasminogen activator, adhesion molecules and their receptors, signalling pathways (e.g. phosphatidylinositol 3-kinase, phospholipase Cγ1, mitogen-activated protein kinases, c-Src kinase, c-Met kinases and heat shock protein. The discovery and development of potential novel therapeutics for each of the targets are also discussed in this review. Among these, the most promising agents that have shown remarkable clinical outcome are anti-angiogenic agents (e.g. bevacizumab). Newer agents, such as c-Met kinase inhibitors, are still undergoing preclinical studies and are yet to have their clinical efficacy proven. Some therapeutics, such as first-generation MMP inhibitors (MMPIs; e.g. marimastat) and more selective versions of them (e.g. prinomastat, tanomastat), have undergone clinical trials. Unfortunately, these drugs produced serious adverse effects that led to the premature termination of their development. In the future, third-generation MMPIs and inhibitors of signalling pathways and adhesion molecules could form valuable novel classes of drugs in the anticancer armamentarium to combat metastasis.
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Affiliation(s)
- Mei S Wong
- Pharmacotherapeutics Unit, Department of Medicine, University Putra Malaysia, Serdang, Selangor, Malaysia
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43
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Ward JM, Treuting PM. Rodent intestinal epithelial carcinogenesis: pathology and preclinical models. Toxicol Pathol 2013; 42:148-61. [PMID: 24178574 DOI: 10.1177/0192623313505156] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Colon cancer is a major human malignancy that afflicts millions of people throughout the world each year. Genetics and diet play large roles in colon carcinogenesis although chemicals may also contribute. For the past 40 years, scientists have studied experimentally induced intestinal carcinogenesis in rodents in order to elucidate the etiology and mechanisms involved. Comparative histopathology has revealed many similarities of rodent and human intestinal cancers. Comparative molecular pathology has also shown genetic similarities. More recently, genetically engineered mice and inflammatory colon cancer models have been used for investigating mechanisms and potential chemopreventive and treatment modalities. This review will focus on comparative histopathology and nonclinical models.
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Li XJ, Leem SH, Park MH, Kim SM. Regulation of YAP through an Akt-dependent process by 3, 3'-diindolylmethane in human colon cancer cells. Int J Oncol 2013; 43:1992-8. [PMID: 24100865 DOI: 10.3892/ijo.2013.2121] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 09/13/2013] [Indexed: 11/06/2022] Open
Abstract
Cancer development is a complex process governed by the interaction of several signaling pathways. The Hippo and PI3K/Akt pathways have been shown to play a critical role in controlling tissue growth involved in the regulation of cell proliferation. 3, 3'-diindolylmethane (DIM) is a natural compound that selectively kills cancer cells without causing toxicity to normal cells. This study aims to investigate whether DIM has an effect on the Hippo signaling pathway mediated via the PI3K/Akt signaling pathway in colon cancer cells. Our study provides new insights into the mechanisms of crosstalk between Hippo signaling and the Akt pathway controlling cell proliferation by PI3K inhibitor and DIM treatment in colon cancer cells. DIM strongly potentiates the lethality of LY294002 in HCT116 cells and inhibits proliferation of colon cancer cells via inactivation of Akt and YAP. Thus, DIM has dramatic therapeutic effects when it is combined with the PI3K inhibitor in the treatment of colon cancer cells. These findings highlight the potential usefulness of DIM and can help develop therapeutic strategies for the prevention and treatment of colon cancer.
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Affiliation(s)
- Xiu Juan Li
- Department of Physiology, Institute for Medical Sciences, Chonbuk National University Medical School, Jeonju, Republic of Korea
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45
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Ryder E, Gleeson D, Sethi D, Vyas S, Miklejewska E, Dalvi P, Habib B, Cook R, Hardy M, Jhaveri K, Bottomley J, Wardle-Jones H, Bussell JN, Houghton R, Salisbury J, Skarnes WC, Ramirez-Solis R. Molecular characterization of mutant mouse strains generated from the EUCOMM/KOMP-CSD ES cell resource. Mamm Genome 2013; 24:286-94. [PMID: 23912999 PMCID: PMC3745610 DOI: 10.1007/s00335-013-9467-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 06/27/2013] [Indexed: 01/03/2023]
Abstract
The Sanger Mouse Genetics Project generates knockout mice strains using the EUCOMM/KOMP-CSD embryonic stem (ES) cell collection and characterizes the consequences of the mutations using a high-throughput primary phenotyping screen. Upon achieving germline transmission, new strains are subject to a panel of quality control (QC) PCR- and qPCR-based assays to confirm the correct targeting, cassette structure, and the presence of the 3' LoxP site (required for the potential conditionality of the allele). We report that over 86 % of the 731 strains studied showed the correct targeting and cassette structure, of which 97 % retained the 3' LoxP site. We discuss the characteristics of the lines that failed QC and postulate that the majority of these may be due to mixed ES cell populations which were not detectable with the original screening techniques employed when creating the ES cell resource.
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Affiliation(s)
- Edward Ryder
- The Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, CB10 1SA, UK.
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46
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Karim BO, Huso DL. Mouse models for colorectal cancer. Am J Cancer Res 2013; 3:240-50. [PMID: 23841024 PMCID: PMC3696531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 05/23/2013] [Indexed: 06/02/2023] Open
Abstract
Colorectal cancer (CRC) is the third leading cause of cancer-related death in the United States, with the number of affected people increasing. There are many risk factors that increase CRC risk, including family or personal history of CRC, smoking, consumption of red meat, obesity, and alcohol consumption. Conversely, increased screening, maintaining healthy body weight, not smoking, and limiting intake of red meat are all associated with reduced CRC morbidity and mortality. Mouse models of CRC were first used in 1928 and have played an important role in understanding CRC biology and treatment and have long been instrumental in clarifying the pathobiology of CRC formation and inhibition. This review focuses on advancements in modeling CRC in mice.
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Affiliation(s)
- Baktiar O Karim
- Department of Molecular and Comparative Pathobiology, The Johns Hopkins University Baltimore, MD 21205, USA
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47
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PIK3CA and APC mutations are synergistic in the development of intestinal cancers. Oncogene 2013; 33:2245-54. [PMID: 23708654 DOI: 10.1038/onc.2013.167] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/08/2013] [Accepted: 03/14/2013] [Indexed: 11/09/2022]
Abstract
Human colorectal cancers are known to possess multiple mutations, though how these mutations interact in tumor development and progression has not been fully investigated. We have previously described the FCPIK3ca* murine colon cancer model, which expresses a constitutively activated phosphoinositide-3 kinase (PI3K) in the intestinal epithelium. The expression of this dominantly active form of PI3K results in hyperplasia and invasive mucinous adenocarcinomas. These cancers form via a non-canonical mechanism of tumor initiation that is mediated through activation of PI3K and not through aberrations in WNT signaling. Since the Adenomatous Polyposis Coli (APC) gene is mutated in the majority of human colon cancers and often occurs simultaneously with PIK3CA mutations, we sought to better understand the interaction between APC and PIK3CA mutations in the mammalian intestine. In this study, we have generated mice in which the expression of a constitutively active PI3K and the loss of APC occur simultaneously in the distal small intestine and colon. Here, we demonstrate that expression of a dominant active PI3K synergizes with loss of APC activity resulting in a dramatic change in tumor multiplicity, size, morphology and invasiveness. Activation of the PI3K pathway is not able to directly activate WNT signaling through the nuclear localization of CTNNB1 (β-catenin) in the absence of aberrant WNT signaling. Alterations at the transcriptional level, including increased CCND1, may be the etiology of synergy between these activated pathways.
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48
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De Sousa E Melo F, Wang X, Jansen M, Fessler E, Trinh A, de Rooij LPMH, de Jong JH, de Boer OJ, van Leersum R, Bijlsma MF, Rodermond H, van der Heijden M, van Noesel CJM, Tuynman JB, Dekker E, Markowetz F, Medema JP, Vermeulen L. Poor-prognosis colon cancer is defined by a molecularly distinct subtype and develops from serrated precursor lesions. Nat Med 2013; 19:614-8. [PMID: 23584090 DOI: 10.1038/nm.3174] [Citation(s) in RCA: 569] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 03/20/2013] [Indexed: 12/15/2022]
Abstract
Colon cancer is a clinically diverse disease. This heterogeneity makes it difficult to determine which patients will benefit most from adjuvant therapy and impedes the development of new targeted agents. More insight into the biological diversity of colon cancers, especially in relation to clinical features, is therefore needed. We demonstrate, using an unsupervised classification strategy involving over 1,100 individuals with colon cancer, that three main molecularly distinct subtypes can be recognized. Two subtypes have been previously identified and are well characterized (chromosomal-instable and microsatellite-instable cancers). The third subtype is largely microsatellite stable and contains relatively more CpG island methylator phenotype-positive carcinomas but cannot be identified on the basis of characteristic mutations. We provide evidence that this subtype relates to sessile-serrated adenomas, which show highly similar gene expression profiles, including upregulation of genes involved in matrix remodeling and epithelial-mesenchymal transition. The identification of this subtype is crucial, as it has a very unfavorable prognosis and, moreover, is refractory to epidermal growth factor receptor-targeted therapy.
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Affiliation(s)
- Felipe De Sousa E Melo
- Laboratory for Experimental Oncology and Radiobiology, Academic Medical Center (AMC), Amsterdam, The Netherlands
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49
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Deming DA, Leystra AA, Farhoud M, Nettekoven L, Clipson L, Albrecht D, Washington MK, Sullivan R, Weichert JP, Halberg RB. mTOR inhibition elicits a dramatic response in PI3K-dependent colon cancers. PLoS One 2013; 8:e60709. [PMID: 23593290 PMCID: PMC3621889 DOI: 10.1371/journal.pone.0060709] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 03/01/2013] [Indexed: 12/13/2022] Open
Abstract
The phosphatidylinositide-3-kinase (PI3K) signaling pathway is critical for multiple cellular functions including metabolism, proliferation, angiogenesis, and apoptosis, and is the most commonly altered pathway in human cancers. Recently, we developed a novel mouse model of colon cancer in which tumors are initiated by a dominant active PI3K (FC PIK3ca*). The cancers in these mice are moderately differentiated invasive mucinous adenocarcinomas of the proximal colon that develop by 50 days of age. Interestingly, these cancers form without a benign intermediary or aberrant WNT signaling, indicating a non-canonical mechanism of tumorigenesis. Since these tumors are dependent upon the PI3K pathway, we investigated the potential for tumor response by the targeting of this pathway with rapamycin, an mTOR inhibitor. A cohort of FC PIK3ca* mice were treated with rapamycin at a dose of 6 mg/kg/day or placebo for 14 days. FDG dual hybrid PET/CT imaging demonstrated a dramatic tumor response in the rapamycin arm and this was confirmed on necropsy. The tumor tissue remaining after treatment with rapamycin demonstrated increased pERK1/2 or persistent phosphorylated ribosomal protein S6 (pS6), indicating potential resistance mechanisms. This unique model will further our understanding of human disease and facilitate the development of therapeutics through pharmacologic screening and biomarker identification.
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Affiliation(s)
- Dustin A. Deming
- Division of Hematology and Oncology, Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Alyssa A. Leystra
- Department of Oncology, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Mohammed Farhoud
- Comprehensive Cancer Center Small Animal Imaging Facility, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Laura Nettekoven
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Linda Clipson
- Department of Oncology, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Dawn Albrecht
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Mary Kay Washington
- Department of Pathology and Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Ruth Sullivan
- Research Animal Resources Center, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Jamey P. Weichert
- Department of Radiology, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Richard B. Halberg
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
- * E-mail:
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50
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Washington MK, Powell AE, Sullivan R, Sundberg J, Wright N, Coffey RJ, Dove WF. Pathology of rodent models of intestinal cancer: progress report and recommendations. Gastroenterology 2013; 144:705-17. [PMID: 23415801 PMCID: PMC3660997 DOI: 10.1053/j.gastro.2013.01.067] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 01/26/2013] [Accepted: 01/31/2013] [Indexed: 12/21/2022]
Abstract
In October 2010, a pathology review of rodent models of intestinal neoplasia was held at The Jackson Laboratory. This review complemented 2 other concurrent events: a workshop on methods of modeling colon cancer in rodents and a conference on current issues in murine and human colon cancer. We summarize the results of the pathology review and the committee's recommendations for tumor nomenclature. A virtual high-resolution image slide box of these models has been developed. This report discusses significant recent developments in rodent modeling of intestinal neoplasia, including the role of stem cells in cancer and the creation of models of metastatic intestinal cancer.
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Affiliation(s)
- Mary Kay Washington
- Department of Pathology, Vanderbilt University Medical Center, Nashville, TN
| | - Anne E. Powell
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Ruth Sullivan
- University of Wisconsin Madison Carbone Cancer Center, Research Animal Resources Center, and Laboratory for Optical and Computational Instrumentation, Madison, WI
| | - John Sundberg
- The Jackson Laboratory, Bar Harbor, ME and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Nicholas Wright
- Barts Cancer Institute, Barts and the London School of Medicine, Queen Mary University of London
| | - Robert J. Coffey
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN and Department of Veterans Affairs Medical Center, Nashville, TN
| | - William F. Dove
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin, Madison, WI
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