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Ding L, Yang Y, Lu Q, Qu D, Chandrakesan P, Feng H, Chen H, Chen X, Liao Z, Du J, Cao Z, Weygant N. Bufalin Inhibits Tumorigenesis, Stemness, and Epithelial-Mesenchymal Transition in Colorectal Cancer through a C-Kit/Slug Signaling Axis. Int J Mol Sci 2022; 23:13354. [PMID: 36362141 PMCID: PMC9656328 DOI: 10.3390/ijms232113354] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 10/23/2022] [Accepted: 10/27/2022] [Indexed: 10/05/2023] Open
Abstract
Colorectal cancer (CRC) is a major source of morbidity and mortality, characterized by intratumoral heterogeneity and the presence of cancer stem cells (CSCs). Bufalin has potent activity against many tumors, but studies of its effect on CRC stemness are limited. We explored bufalin's function and mechanism using CRC patient-derived organoids (PDOs) and cell lines. In CRC cells, bufalin prevented nuclear translocation of β-catenin and down-regulated CSC markers (CD44, CD133, LGR5), pluripotency factors, and epithelial-mesenchymal transition (EMT) markers (N-Cadherin, Slug, ZEB1). Functionally, bufalin inhibited CRC spheroid formation, aldehyde dehydrogenase activity, migration, and invasion. Network analysis identified a C-Kit/Slug signaling axis accounting for bufalin's anti-stemness activity. Bufalin treatment significantly downregulated C-Kit, as predicted. Furthermore, overexpression of C-Kit induced Slug expression, spheroid formation, and bufalin resistance. Similarly, overexpression of Slug resulted in increased expression of C-Kit and identical functional effects, demonstrating a pro-stemness feedback loop. For further study, we established PDOs from diagnostic colonoscopy. Bufalin differentially inhibited PDO growth and proliferation, induced apoptosis, restored E-cadherin, and downregulated CSC markers CD133 and C-Myc, dependent on C-Kit/Slug. These findings suggest that the C-Kit/Slug axis plays a pivotal role in regulating CRC stemness, and reveal that targeting this axis can inhibit CRC growth and progression.
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Affiliation(s)
- Ling Ding
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Yuning Yang
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Qin Lu
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Dongfeng Qu
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | | | - Hailan Feng
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Hong Chen
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Xuzheng Chen
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Zhuhui Liao
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Jian Du
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Zhiyun Cao
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Nathaniel Weygant
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Fujian Key Laboratory of Integrative Medicine in Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
- Key Laboratory of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
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Neogambogic acid suppresses characteristics and growth of colorectal cancer stem cells by inhibition of DLK1 and Wnt/β-catenin pathway. Eur J Pharmacol 2022; 929:175112. [DOI: 10.1016/j.ejphar.2022.175112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 06/16/2022] [Accepted: 06/16/2022] [Indexed: 11/19/2022]
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Zahra MH, Afify SM, Hassan G, Nawara HM, Kumon K, Seno A, Seno M. Metformin suppresses self-renewal and stemness of cancer stem cell models derived from pluripotent stem cells. Cell Biochem Funct 2021; 39:896-907. [PMID: 34268768 DOI: 10.1002/cbf.3661] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/24/2021] [Accepted: 06/29/2021] [Indexed: 11/09/2022]
Abstract
Metformin exhibits anti-cancer activities in various types of tumours while it is prescribed as the first-line drug for type 2 diabetes. Since new evidence has recently suggested that metformin could target cancer stem cells (CSCs) and prevent their recurrence, repositioning of metformin could be considered as a candidate for anti-CSC agent. In this study, we assessed the effect of metformin on the cancer stem cells developed from induced pluripotent stem cells. As the result, metformin significantly suppressed the self-renewal ability of CSCs when assessed by 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and cell counting methods exhibiting the IC50 as approximately 20 mM, which suppressed tube formation by CSCs on Matrigel reducing the angiogenic potential of CSCs. Cell cycle analysis showed that metformin reduced the percentage of cells in the S phase increasing the percentage of cells in G0/G1 phase. Moreover, the tumorigenicity of CSCs was found to be attenuated when the cells were injected with metformin. From these results, we concluded that metformin could be promising for targeted therapy by repositioning the widely available drugs with safety. SIGNIFICANCE OF THE STUDY: Metformin could target CSCs and prevent their recurrence, repositioning of metformin could be considered as a candidate for the anti-CSC agent. In this paper, we assessed the effect of metformin on the CSCs developed from induced pluripotent stem cells. Here, we show that metformin suppresses the self-renewal and tube formation abilities of CSCs. We also show that metformin reduces the percentage of cells in the S phase increasing the percentage of cells in G0/G1 phase. Moreover, the tumorigenicity of CSCs was found to be attenuated when grafted in vivo after treatment with metformin.
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Affiliation(s)
- Maram H Zahra
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan
| | - Said M Afify
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan.,Division of Biochemistry, Chemistry Department, Faculty of Science, Menoufia University, Menoufia, Egypt
| | - Ghmkin Hassan
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan.,Department of Microbiology and Biochemistry, Faculty of Pharmacy, Damascus University, Damascus, Syria
| | - Hend M Nawara
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan
| | - Kazuki Kumon
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan
| | - Akimasa Seno
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan
| | - Masaharu Seno
- Laboratory of Nano-Biotechnology, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, Okayama, Japan
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Seo Y, Kim J, Park SJ, Park JJ, Cheon JH, Kim WH, Kim TI. Metformin Suppresses Cancer Stem Cells through AMPK Activation and Inhibition of Protein Prenylation of the Mevalonate Pathway in Colorectal Cancer. Cancers (Basel) 2020; 12:cancers12092554. [PMID: 32911743 PMCID: PMC7563617 DOI: 10.3390/cancers12092554] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/31/2020] [Accepted: 09/04/2020] [Indexed: 01/20/2023] Open
Abstract
Simple Summary Tumor suppressing effect of metformin has been reported, and one of mechanism of this effect is suppression of cancer stem cells (CSCs). However, detailed mechanism of metformin-induced CSC-inhibitory effect has not been known. We demonstrated that the CSC-suppressive effect of metformin was associated with AMPK activation/mTOR inhibition and repression of protein prenylation through suppression of mevalonate pathway in colorectal cancer. Further studies would be needed to investigate cross-reactions with other mechanisms of the antitumor effect of metformin, and clinical impact of metformin should be considered as chemopreventive or adjunctive treatment for colorectal tumor. Abstract Metformin is a well-known AMPK (AMP-activated protein kinase) activator that suppresses cancer stem cells (CSCs) in some cancers. However, the mechanisms of the CSC-suppressing effects of metformin are not yet well understood. In this study, we investigated the CSC-suppressive effect of metformin via the mevalonate (MVA) pathway in colorectal cancer (CRC). Two colorectal cancer cell lines, HT29 and DLD-1 cells, were treated with metformin, mevalonate, or a combination of the two. We measured CSC populations by flow cytometric analysis (CD44+/CD133+) and by tumor spheroid growth. The expression of p-AMPK, mTORC1 (pS6), and key enzymes (HMGCR, FDPS, GGPS1, and SQLE) of the MVA pathway was also analyzed. We investigated the effects of metformin and/or mevalonate in xenograft mice using HT29 cells; immunohistochemical staining for CSC markers and key enzymes of the MVA pathway in tumor xenografts was performed. In both HT29 and DLD-1 cells, the CSC population was significantly decreased following treatment with metformin, AMPK activator (AICAR), HMG-CoA reductase inhibitor (simvastatin), or mTOR inhibitor (rapamycin), and was increased by mevalonate. The CSC-suppressing effect of these drugs was attenuated by mevalonate. The results of tumor spheroid growth matched those of the CSC population experiments. Metformin treatment increased p-AMPK and decreased mTOR (pS6) expression; these effects were reversed by addition of mevalonate. The expression of key MVA pathway enzymes was significantly increased in tumor spheroid culture, and by addition of mevalonate, and decreased upon treatment with metformin, AICAR, or rapamycin. In xenograft experiments, tumor growth and CSC populations were significantly reduced by metformin, and this inhibitory effect of metformin was abrogated by combined treatment with mevalonate. Furthermore, in the MVA pathway, CSC populations were reduced by inhibition of protein prenylation with a farnesyl transferase inhibitor (FTI-277) or a geranylgeranyl transferase inhibitor (GGTI-298), but not by inhibition of cholesterol synthesis with a squalene synthase inhibitor (YM-53601). In conclusion, the CSC-suppressive effect of metformin was associated with AMPK activation and repression of protein prenylation through MVA pathway suppression in colorectal cancer.
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Affiliation(s)
- Yoojeong Seo
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Janghyun Kim
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
| | - Soo Jung Park
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jae Jun Park
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
- Cancer Prevention Center, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jae Hee Cheon
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Won Ho Kim
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Tae Il Kim
- Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.S.); (J.K.); (S.J.P.); (J.J.P.); (J.H.C.); (W.H.K.)
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
- Cancer Prevention Center, Yonsei University College of Medicine, Seoul 03722, Korea
- Correspondence:
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Fernández-Tomé S, Xu F, Han Y, Hernández-Ledesma B, Xiao H. Inhibitory Effects of Peptide Lunasin in Colorectal Cancer HCT-116 Cells and Their Tumorsphere-Derived Subpopulation. Int J Mol Sci 2020; 21:ijms21020537. [PMID: 31947688 PMCID: PMC7014180 DOI: 10.3390/ijms21020537] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/07/2020] [Accepted: 01/13/2020] [Indexed: 01/06/2023] Open
Abstract
The involvement of cancer stem-like cells (CSC) in the tumor pathogenesis has profound implications for cancer therapy and chemoprevention. Lunasin is a bioactive peptide from soybean and other vegetal sources with proven protective activities against cancer and other chronic diseases. The present study focused on the cytotoxic effect of peptide lunasin in colorectal cancer HCT-116 cells, both the bulk tumor and the CSC subpopulations. Lunasin inhibited the proliferation and the tumorsphere-forming capacity of HCT-116 cells. Flow cytometry results demonstrated that the inhibitory effects were related to apoptosis induction and cell cycle-arrest at G1 phase. Moreover, lunasin caused an increase in the sub-GO/G1 phase of bulk tumor cells, linked to the apoptotic events found. Immunoblotting analysis further showed that lunasin induced apoptosis through activation of caspase-3 and cleavage of PARP, and could modulate cell cycle progress through the cyclin-dependent kinase inhibitor p21. Together, these results provide new evidence on the chemopreventive activity of peptide lunasin on colorectal cancer by modulating both the parental and the tumorsphere-derived subsets of HCT-116 cells.
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Affiliation(s)
- Samuel Fernández-Tomé
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM CEI UAM+CSIC), Nicolás Cabrera, 9, 28049 Madrid, Spain;
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA; (F.X.); (Y.H.)
| | - Fei Xu
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA; (F.X.); (Y.H.)
| | - Yanhui Han
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA; (F.X.); (Y.H.)
| | - Blanca Hernández-Ledesma
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM CEI UAM+CSIC), Nicolás Cabrera, 9, 28049 Madrid, Spain;
- Correspondence: (B.H.-L.); (H.X.); Tel.: +34 910017970 (B.H.-L.); +1 413-545-2281 (H.X.)
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA; (F.X.); (Y.H.)
- Correspondence: (B.H.-L.); (H.X.); Tel.: +34 910017970 (B.H.-L.); +1 413-545-2281 (H.X.)
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Mileo AM, Nisticò P, Miccadei S. Polyphenols: Immunomodulatory and Therapeutic Implication in Colorectal Cancer. Front Immunol 2019; 10:729. [PMID: 31031748 PMCID: PMC6470258 DOI: 10.3389/fimmu.2019.00729] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 03/19/2019] [Indexed: 12/12/2022] Open
Abstract
Polyphenolic compounds, widely present in fruits, vegetables, and cereals, have potential benefits for human health and are protective agents against the development of chronic/degenerative diseases including cancer. More recently these bioactive molecules have been gaining great interest as anti-inflammatory and immunomodulatory agents, mainly in neoplasia where the pro-inflammatory context might promote carcinogenesis. Colorectal cancer (CRC) is considered a major public healthy issue, a leading cause of cancer mortality and morbidity worldwide. Epidemiological, pre-clinical and clinical investigations have consistently highlighted important relationships between large bowel inflammation, gut microbiota (GM), and colon carcinogenesis. Many experimental studies and clinical evidence suggest that polyphenols have a relevant role in CRC chemoprevention, exhibit cytotoxic capability vs. CRC cells and induce increased sensitization to chemo/radiotherapies. These effects are most likely related to the immunomodulatory properties of polyphenols able to modulate cytokine and chemokine production and activation of immune cells. In this review we summarize recent advancements on immunomodulatory activities of polyphenols and their ability to counteract the inflammatory tumor microenvironment. We focus on potential role of natural polyphenols in increasing the cell sensitivity to colon cancer therapies, highlighting the polyphenol-based combined treatments as innovative immunomodulatory strategies to inhibit the growth of CRC.
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Affiliation(s)
- Anna Maria Mileo
- Tumor Immunology and Immunotherapy Unit, Department of Research, Advanced Diagnostic and Technological Innovation, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Paola Nisticò
- Tumor Immunology and Immunotherapy Unit, Department of Research, Advanced Diagnostic and Technological Innovation, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Stefania Miccadei
- Tumor Immunology and Immunotherapy Unit, Department of Research, Advanced Diagnostic and Technological Innovation, IRCCS Regina Elena National Cancer Institute, Rome, Italy
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Targeting cancer stem cells as therapeutic approach in the treatment of colorectal cancer. Int J Biochem Cell Biol 2019; 110:75-83. [PMID: 30818083 DOI: 10.1016/j.biocel.2019.02.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/21/2019] [Accepted: 02/25/2019] [Indexed: 02/07/2023]
Abstract
Colorectal cancer is one of the most common cancers globally. A large portion of colorectal cancer patients who are treated with conventional chemotherapy eventually develop local recurrence or metastases. The failure of a complete cure in colorectal cancer patients may be related to the lack of complete eradication of cancer stem cells when using conventional therapy. Colorectal cancer stem cells comprise a small population of tumor cells that possess the properties of rapid proliferation and differentiation. The colorectal cancer stem cells are also phenotypically and molecularly distinct, and resistant to conventional chemo-radiotherapy. Therefore, it is important to identify approaches in combination with conventional therapy for targeting and eradicating cancer cells. The aim of this review was to summarize the main findings of recent studies on targeting colorectal cancer stem cells as a novel therapeutic approach in colorectal cancer treatment.
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Wimsatt JH, Montgomery C, Thomas LS, Savard C, Tallman R, Innes K, Jrebi N. Assessment of a mouse xenograft model of primary colorectal cancer with special reference to perfluorooctane sulfonate. PeerJ 2018; 6:e5602. [PMID: 30405966 PMCID: PMC6216948 DOI: 10.7717/peerj.5602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 08/18/2018] [Indexed: 01/28/2023] Open
Abstract
Colorectal cancer ranks third among the most commonly diagnosed cancers in the United States. Current therapies have a range of side effects, and the development of a reliable animal model to speed the discovery of safe effective preventative therapies would be of great value. A cross-sectional study in a large Appalachian population recently showed an association between low circulating levels of perfluorooctane sulfonate (PFOS) and a reduced prevalence of colorectal cancer. A study using APCmin (C57BL/6J-ApcMin/J) mice prone to familial adenomatous polyposis found PFOS was protective when exposure occurred during tumor development. To test the possible benefit of PFOS on spontaneous colorectal cancer, we developed a mouse model utilizing primary patient colorectal cancer implants into NSG (NOD.Cg-PrkdcscidIl2rgtm1Wjl /Sz) mice. Study goals included: (1) to assess potential factors supporting the successful use of colorectal cancer from heterogeneous tumors for PDX studies; and, (2) evaluate PFOS as a therapy in tumor matched pairs of mice randomized to receive PFOS or vehicle. The time in days for mice to grow primary tumors to 5 mm took almost 2 months (mean = 53.3, se = 5.7, range = 17-136). Age of mice at implantation, patient age, gender and race appeared to have no discernable effect on engraftment rates. Engraftment rates for low and high-grade patient tumors were similar. PFOS appeared to reduce tumor size dramatically in one group of tumors, those from the right ascending colon. That is, by 5 weeks of treatment in two mice, PFOS had eliminated their 52.4 mm3 and 124.6 mm3 masses completely, an effect that was sustained for 10 weeks of treatment; in contrast, their corresponding matched vehicle control mice had tumors that grew to 472.7 mm3 and 340.1 mm3 in size respectively during the same period. In a third xenograft mouse, the tumor growth was dramatically blunted although not eliminated, and compared favorably to their matched vehicle controls over the same period. These preliminary findings suggested that this mouse model may be advantageous for testing compounds of potential value in the treatment of colorectal cancer, and PFOS may have utility in selected cases.
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Affiliation(s)
- Jeffrey H Wimsatt
- Department of Medicine, West Virginia University, Morgantown, WV, United States of America.,Department of Epidemiology, West Virginia University, Morgantown, WV, United States of America
| | - Caitlin Montgomery
- Department of Medicine, West Virginia University, Morgantown, WV, United States of America.,Department of Epidemiology, West Virginia University, Morgantown, WV, United States of America
| | - Laurel S Thomas
- Department of Medicine, West Virginia University, Morgantown, WV, United States of America
| | - Charity Savard
- Department of Medicine, West Virginia University, Morgantown, WV, United States of America
| | - Rachel Tallman
- Department of Medicine, West Virginia University, Morgantown, WV, United States of America
| | - Kim Innes
- Department of Epidemiology, West Virginia University, Morgantown, WV, United States of America
| | - Nezar Jrebi
- Department of Surgery, West Virginia University, Morgantown, WV, United States of America
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Effects of metformin on colorectal cancer stem cells depend on alterations in glutamine metabolism. Sci Rep 2018; 8:409. [PMID: 29323154 PMCID: PMC5765079 DOI: 10.1038/s41598-017-18762-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 12/13/2017] [Indexed: 12/14/2022] Open
Abstract
Metformin has been known to suppress cancer stem cells (CSCs) in some cancers. However, the differential effects of metformin on CSCs and their mechanisms have not been reported. Herein, metformin induced pAMPK activation and pS6 suppression in metformin-sensitive (HT29) cells, but not in metformin-resistant (SW620) cells. The oxygen consumption rate was higher in HT29 cells than in SW620 cells and showed a prominent decrease after metformin treatment in HT29 cells. In glutamine-depleted medium, but not in low-glucose medium, SW620 cells became sensitive to the CSC-suppressing effect of metformin. A combination of metformin and glutaminase C inhibitor (compound 968) suppressed CSCs in SW620 cells and enhanced that effect in HT29 cells. SW620 cells showed higher expression of glutaminase 1 and glutamine transporter (ASCT2) than HT29 cells, especially ASCT2 in CSCs. Knockdown of glutaminase 1, ASCT2, and c-Myc induced significant CSC-suppression and enhanced CSC-suppressing effect of metformin and compound 968. In xenografts and human cancer organoids, combined treatment with metformin and compound 968 showed the same results as those shown in vitro. In conclusion, the effect of metformin on CSCs varies depending on the AMPK-mTOR and glutamine metabolism. The inhibition of glutamine pathway could enhance the CSC-suppressing effect of metformin, overcoming metformin resistance.
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Fransgaard T, Thygesen LC, Gögenur I. Comment on: Need for Differentiating Diabetes-Specific Mortality from Total Mortality when Comparing Metformin with Insulin Regarding Cancer Survival. Ann Surg Oncol 2017; 24:615. [PMID: 29098456 DOI: 10.1245/s10434-017-6177-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Indexed: 11/18/2022]
Affiliation(s)
| | - Lau Caspar Thygesen
- National Institute of Public Health, University of Southern Denmark, Copenhagen K, Denmark
| | - Ismail Gögenur
- Department of Surgery, Koege Hospital, Koege, Denmark.,Danish Colorectal Cancer Group, Copenhagen, Denmark
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11
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Daugan M, Dufaÿ Wojcicki A, d’Hayer B, Boudy V. Metformin: An anti-diabetic drug to fight cancer. Pharmacol Res 2016; 113:675-685. [DOI: 10.1016/j.phrs.2016.10.006] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 09/22/2016] [Accepted: 10/04/2016] [Indexed: 12/22/2022]
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12
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Veettil SK, Saokaew S, Lim KG, Ching SM, Phisalprapa P, Chaiyakunapruk N. Comparative effectiveness of chemopreventive interventions for colorectal cancer: protocol for a systematic review and network meta-analysis of randomised controlled trials. J Gastrointest Oncol 2016; 7:595-602. [PMID: 27563450 DOI: 10.21037/jgo.2016.04.02] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is the third most common cancer worldwide and is associated with substantial socioeconomic burden. Despite considerable research, including numerous randomised controlled trials (RCTs) and systematic reviews assessed the effect of various chemopreventive interventions for CRC, there remains uncertainty regarding the comparative effectiveness of these agents. No network meta-analytic study has been published to evaluate the efficacies of these agents for CRC. Therefore, the aim of this study is to summarise the direct and indirect evidence for these interventions to prevent CRC in average-high risk individuals, and to rank these agents for practical consideration. METHODS We will acquire eligible studies through a systematic search of MEDLINE, EMBASE, the Cochrane Central Registry of Controlled Trials, CINAHL plus, IPA and clinicaltrials.gov website. The Cochrane Risk of Bias Tool will be used to assess the quality of included studies. The primary outcomes are the incidence of CRC, the incidence/recurrence of any adenoma or change in polyp burden (number or size). Quantitative synthesis or meta-analysis will be considered. We will also construct a network meta-analysis (NMA) to improve precision of the comparisons among chemo-preventive interventions by combining direct and indirect evidence. The probability of each treatment being the best and/or safest, the number-needed-to-treat [NNT; 95% credible interval (CrIs)], and the number-needed-to-harm (NNH; 95% CrIs) will be calculated to provide measures of treatment efficacy. The GRADE approach will be used to rate the quality of evidence of estimates derived from NMA. RESULTS This protocol has been registered (registration number: CRD42015025849) with the PROSPERO (International Prospective Register of Systematic Reviews). The procedures of this systematic review and NMA will be conducted in accordance with the PRISMA-compliant guideline. The results of this systematic review and NMA will be submitted to a peer-reviewed journal for publication. CONCLUSIONS To the best of our knowledge, this study will be the first NMA to identify the comparative effectiveness of interventions for the prevention of CRC. The results of our study will update evidence for chemoprevention of CRC, identify key areas for future research, and provide a framework for conducting large systematic reviews involving indirect comparisons.
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Affiliation(s)
- Sajesh K Veettil
- School of Pharmacy/School of Postgraduate Studies, International Medical University, Kuala Lumpur 57000, Malaysia
| | - Surasak Saokaew
- School of Pharmacy, Monash University, Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia;; Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao Muang, Phayao 56000, Thailand;; Centre of Pharmaceutical Outcomes Research, Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
| | - Kean Ghee Lim
- Clinical School, Department of Surgery, International Medical University, Jalan Rasah, Seremban, 70300, Negeri Sembilan, Malaysia
| | - Siew Mooi Ching
- Department of Family Medicine, Faculty of Medicine and Health Sciences, University Putra Malaysia, Serdang 43400, Malaysia;; Malaysian Research Institute on Ageing, Universiti Putra Malaysia, Serdang, Malaysia
| | - Pochamana Phisalprapa
- Division of Ambulatory Medicine, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nathorn Chaiyakunapruk
- School of Pharmacy, Monash University, Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia;; Centre of Pharmaceutical Outcomes Research, Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand;; School of Population Health, University of Queensland, Brisbane, Australia;; School of Pharmacy, University of Wisconsin-Madison, Madison, WI, USA
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Rigas B, Tsioulias GJ. The evolving role of nonsteroidal anti-inflammatory drugs in colon cancer prevention: a cause for optimism. J Pharmacol Exp Ther 2015; 353:2-8. [PMID: 25589413 DOI: 10.1124/jpet.114.220806] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Colorectal cancer (CRC) is a serious yet preventable disease. The low acceptance and cost of colonoscopy as a screening method or CRC make chemoprevention an important option. Nonsteroidal anti-inflammatory drugs (NSAIDs), not currently recommended for CRC prevention, have the potential to evolve into the agents of choice for this indication. Here, we discuss the promise and challenge of NSAIDs for this chemopreventive application.Multiple epidemiologic studies, randomized clinical trials (RCTs) of sporadic colorectal polyp recurrence, RCTs in patients with hereditary colorectal cancer syndromes, and pooled analyses of cardiovascular-prevention RCTs linked to cancer outcomes have firmly established the ability of conventional NSAIDs to prevent CRC. NSAIDs, however, are seriously limited by their toxicity,which can become cumulative with their long-term administration for chemoprevention, whereas drug interactions in vulnerable elderly patients compound their safety. Newer, chemically modified NSAIDs offer the hope of enhanced efficacy and safety.Recent work also indicates that targeting earlier stages of colorectal carcinogenesis, such as the lower complexity aberrant crypt foci, is a promising approach that may only require relatively short use of chemopreventive agents. Drug combination approaches exemplified by sulindac plus difluoromethylornithine appear very efficacious. Identification of those at risk or most likely to benefit from a given intervention using predictive biomarkers may usher in personalized chemoprevention. Agents that offer simultaneous chemoprevention of diseases in addition to CRC, e.g., cardiovascular and/or neurodegenerative diseases,may have a much greater potential for a broad clinical application.
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Affiliation(s)
- Basil Rigas
- Department of Medicine, Stony Brook University, Stony Brook, NY, USA. basil.rigas@stonybrookmedicine
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