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Muruthi CW, Ngugi MP, Runo SM, Mwitari PG. In Vitro Antiproliferative Effects and Phytochemical Characterization of Carissa edulis ((Forssk) Vahl) and Pappea capensis (Eckyl and Zeyh) Extracts. J Evid Based Integr Med 2023; 28:2515690X231187711. [PMID: 37489007 PMCID: PMC10387709 DOI: 10.1177/2515690x231187711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 05/30/2023] [Accepted: 06/24/2023] [Indexed: 07/26/2023] Open
Abstract
Cancer mortality is a global concern. The current therapeutic approaches despite showing efficacy are characterized by several limitations. Search for alternatives has led to the use of herbal plants including C. edulis and P. capensis. However, there is limited research on antiproliferative effects of these medicinal plants. The study sought to evaluate antiproliferative effects of the plants against human breast and prostate cancers using cell viability, and gene expression assays to determine modulation of apoptotic genes. Further, Liquid Chromatography Mass Spectrophotometer (LC-MS) and Gas Chromatography Mass Spectrophotometer (GC-MS) analyses were performed to confirm phytocompounds in the extracts. The results indicated that ethylacetate extracts of C. edulis and P. capensis had the highest activity against cancer cells with IC50 values of 2.12 ± 0.02, and 6.57 ± 0.03 μg/ml on HCC 1395 and 2.92 ± 0.17 and 5.00 ± 0.17 μg/ml on DU145, respectively. Moreover, the plants extracts exhibited relatively less cytotoxic activities against Vero cell lines (IC50 > 20 μg/ml). The extracts also exhibit selectivity against the cancer cells (SI > 3). Further, mRNA expression of p53 in the treated HCC 1395 was increased by 7 and 3-fold, whereas by 3 and 2-fold in DU145 cells, upon treatment with ethylacetate extracts of C. edulis and P. capensis, respectively. Similarly, several-fold increases were observed in the number of transcripts of Bax in HCC 1395 and HOXB13 in DU145 cells. Phytochemical analyses detected presence of phytocompounds including flavonoids, phenolics, tocopherols and terpenoids which are associated with anticancer activity. Findings from this study provide a scientific validation for the folklore use of these plants in management of cancer.
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Affiliation(s)
- Carolyn Wanjira Muruthi
- Department of Biochemistry, Microbiology and Biotechnology-Kenyatta University, Nairobi, Kenya
| | - Mathew Piero Ngugi
- Department of Biochemistry, Microbiology and Biotechnology-Kenyatta University, Nairobi, Kenya
| | - Steven Maina Runo
- Department of Biochemistry, Microbiology and Biotechnology-Kenyatta University, Nairobi, Kenya
| | - Peter Githaiga Mwitari
- Centre for Traditional Medicine and Drug Research-Kenya Medical Research Institute (KEMRI), Nairobi, Kenya
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Fat-Soluble Vitamin Deficiencies and Disruption of the Immune System in Pancreatic Cancer: A Vicious Cycle. Pancreas 2022; 51:923-929. [PMID: 36607936 DOI: 10.1097/mpa.0000000000002128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
ABSTRACT Pancreatic ductal adenocarcinoma (PDAC) is currently an increasing contributor to cancer-related mortality. Despite advances in cancer treatment, PDAC survival rates have remained roughly unchanged over the years. Specifically, late diagnosis and insensitivity to currently available therapeutic regimens have been identified as the main causes for its poor survival. Pancreatic exocrine insufficiency (PEI) is a typical complication associated with PDAC diagnosis and pancreatic surgery. Pancreatic exocrine insufficiency, a major contributor to maldigestion in PDAC, is often not treated because it remains undetected because of lack of overt signs and symptoms. In this review, we will focus on the major consequences of PEI, including the inadequacy of lipase excretion, which results in deficiency of fat-soluble vitamins. Because PDAC is known for its immune-high jacking mechanisms, we describe key features in which deficiencies of fat-soluble vitamins may contribute to the aggressive biological behavior and immune evasion in PDAC. Because PEI has been shown to worsen survival rates in patients with PDAC, detecting PEI and the related fat-soluble vitamin deficits at the time of PDAC diagnosis is critical. Moreover, timely supplementation of pancreatic enzymes and fat-soluble vitamins may improve outcomes for PDAC patients.
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Nasif D, Real S, Roqué M, Branham MT. CDC42 as an epigenetic regulator of ID4 in triple-negative breast tumors. Breast Cancer 2022; 29:562-573. [DOI: 10.1007/s12282-022-01334-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 01/09/2022] [Indexed: 12/01/2022]
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4
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Natural Bioactive Compounds Targeting Epigenetic Pathways in Cancer: A Review on Alkaloids, Terpenoids, Quinones, and Isothiocyanates. Nutrients 2021; 13:nu13113714. [PMID: 34835969 PMCID: PMC8621755 DOI: 10.3390/nu13113714] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/18/2021] [Accepted: 10/19/2021] [Indexed: 12/11/2022] Open
Abstract
Cancer is one of the most complex and systemic diseases affecting the health of mankind, causing major deaths with a significant increase. This pathology is caused by several risk factors, of which genetic disturbances constitute the major elements, which not only initiate tumor transformation but also epigenetic disturbances which are linked to it and which can induce transcriptional instability. Indeed, the involvement of epigenetic disturbances in cancer has been the subject of correlations today, in addition to the use of drugs that operate specifically on different epigenetic pathways. Natural molecules, especially those isolated from medicinal plants, have shown anticancer effects linked to mechanisms of action. The objective of this review is to explore the anticancer effects of alkaloids, terpenoids, quinones, and isothiocyanates.
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Püschel J, Dubrovska A, Gorodetska I. The Multifaceted Role of Aldehyde Dehydrogenases in Prostate Cancer Stem Cells. Cancers (Basel) 2021; 13:4703. [PMID: 34572930 PMCID: PMC8472046 DOI: 10.3390/cancers13184703] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/27/2021] [Accepted: 09/13/2021] [Indexed: 02/06/2023] Open
Abstract
Cancer stem cells (CSCs) are the only tumor cells possessing self-renewal and differentiation properties, making them an engine of tumor progression and a source of tumor regrowth after treatment. Conventional therapies eliminate most non-CSCs, while CSCs often remain radiation and drug resistant, leading to tumor relapse and metastases. Thus, targeting CSCs might be a powerful tool to overcome tumor resistance and increase the efficiency of current cancer treatment strategies. The identification and isolation of the CSC population based on its high aldehyde dehydrogenase activity (ALDH) is widely accepted for prostate cancer (PCa) and many other solid tumors. In PCa, several ALDH genes contribute to the ALDH activity, which can be measured in the enzymatic assay by converting 4, 4-difluoro-4-bora-3a, 4a-diaza-s-indacene (BODIPY) aminoacetaldehyde (BAAA) into the fluorescent product BODIPY-aminoacetate (BAA). Although each ALDH isoform plays an individual role in PCa biology, their mutual functional interplay also contributes to PCa progression. Thus, ALDH proteins are markers and functional regulators of CSC properties, representing an attractive target for cancer treatment. In this review, we discuss the current state of research regarding the role of individual ALDH isoforms in PCa development and progression, their possible therapeutic targeting, and provide an outlook for the future advances in this field.
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Affiliation(s)
- Jakob Püschel
- OncoRay-National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden and Helmholtz-Zentrum Dresden-Rossendorf, 01309 Dresden, Germany;
| | - Anna Dubrovska
- OncoRay-National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden and Helmholtz-Zentrum Dresden-Rossendorf, 01309 Dresden, Germany;
- National Center for Tumor Diseases (NCT), Partner Site Dresden, German Cancer Research Center (DKFZ), Heidelberg, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, and Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01307 Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiooncology-OncoRay, 01328 Dresden, Germany
- German Cancer Consortium (DKTK), Partner Site Dresden and German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Ielizaveta Gorodetska
- OncoRay-National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden and Helmholtz-Zentrum Dresden-Rossendorf, 01309 Dresden, Germany;
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6
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Dulińska-Litewka J, Sharoni Y, Hałubiec P, Łazarczyk A, Szafrański O, McCubrey JA, Gąsiorkiewicz B, Laidler P, Bohn T. Recent Progress in Discovering the Role of Carotenoids and Their Metabolites in Prostatic Physiology and Pathology with a Focus on Prostate Cancer-A Review-Part I: Molecular Mechanisms of Carotenoid Action. Antioxidants (Basel) 2021; 10:antiox10040585. [PMID: 33920256 PMCID: PMC8069951 DOI: 10.3390/antiox10040585] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/05/2021] [Accepted: 04/07/2021] [Indexed: 12/13/2022] Open
Abstract
Among the vast variety of plant-derived phytochemicals, the group of carotenoids has continuously been investigated in order to optimize their potential application in the area of dietary intervention and medicine. One organ which has been especially targeted in many of these studies and clinical trials is the human prostate. Without doubt, carotenoids (and their endogenous derivatives—retinoids and other apo-carotenoids) are involved in intra- and intercellular signaling, cell growth and differentiation of prostate tissue. Due to the accumulation of new data on the role of different carotenoids such as lycopene (LC) and β-carotene (BC) in prostatic physiology and pathology, the present review aims to cover the past ten years of research in this area. Data from experimental studies are presented in the first part of the review, while epidemiological studies are disclosed and discussed in the second part. The objective of this compilation is to emphasize the present state of knowledge regarding the most potent molecular targets of carotenoids and their main metabolites, as well as to propose promising carotenoid agents for the prevention and treatment of prostatic diseases.
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Affiliation(s)
- Joanna Dulińska-Litewka
- Medical Biochemistry Medical College, Jagiellonian University, 31-034 Cracow, Poland; (P.H.); (A.Ł.); (O.S.); (B.G.); (P.L.)
- Correspondence: ; Tel.: +48-12-422-3272
| | - Yoav Sharoni
- Department of Clinical Biochemistry, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653 Beer Sheva, Israel;
| | - Przemysław Hałubiec
- Medical Biochemistry Medical College, Jagiellonian University, 31-034 Cracow, Poland; (P.H.); (A.Ł.); (O.S.); (B.G.); (P.L.)
| | - Agnieszka Łazarczyk
- Medical Biochemistry Medical College, Jagiellonian University, 31-034 Cracow, Poland; (P.H.); (A.Ł.); (O.S.); (B.G.); (P.L.)
| | - Oskar Szafrański
- Medical Biochemistry Medical College, Jagiellonian University, 31-034 Cracow, Poland; (P.H.); (A.Ł.); (O.S.); (B.G.); (P.L.)
| | - James A. McCubrey
- Department of Microbiology and Immunology, Brody Medical Sciences Building, East Carolina University, Greenville, NC 27834, USA;
| | - Bartosz Gąsiorkiewicz
- Medical Biochemistry Medical College, Jagiellonian University, 31-034 Cracow, Poland; (P.H.); (A.Ł.); (O.S.); (B.G.); (P.L.)
| | - Piotr Laidler
- Medical Biochemistry Medical College, Jagiellonian University, 31-034 Cracow, Poland; (P.H.); (A.Ł.); (O.S.); (B.G.); (P.L.)
| | - Torsten Bohn
- Nutrition and Health Research Group, Department of Population Health, Luxembourg Institute of Health, 1 A-B, rue Thomas Edison, L-23 1445 Strassen, Luxembourg;
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7
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Cheng S, Yang S, Shi Y, Shi R, Yeh Y, Yu X. Neuroendocrine prostate cancer has distinctive, non-prostatic HOX code that is represented by the loss of HOXB13 expression. Sci Rep 2021; 11:2778. [PMID: 33531604 PMCID: PMC7854582 DOI: 10.1038/s41598-021-82472-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/20/2021] [Indexed: 01/08/2023] Open
Abstract
HOX gene-encoded homeobox proteins control body patterning during embryonic development; the specific expression pattern of HOX genes may correspond to tissue identity. In this study, using RNAseq data of 1019 human cancer cell lines that originated from 24 different anatomic sites, we established HOX codes for various types of tissues. We applied these HOX codes to the transcriptomic profiles of prostate cancer (PCa) samples and found that the majority of prostate adenocarcinoma (AdPCa) samples sustained a prostate-specific HOX code whereas the majority of neuroendocrine prostate cancer (NEPCa) samples did not, which reflects the anaplastic nature of NEPCa. Also, our analysis showed that the NEPCa samples did not correlate well with the HOX codes of any other tissue types, indicating that NEPCa tumors lose their prostate identities but do not gain new tissue identities. Additionally, using immunohistochemical staining, we evaluated the prostatic expression of HOXB13, the most prominently changed HOX gene in NEPCa. We found that HOXB13 was expressed in both benign prostatic tissues and AdPCa but its expression was reduced or lost in NEPCa. Furthermore, we treated PCa cells with all trans retinoic acid (ATRA) and found that the reduced HOXB13 expression can be reverted. This suggests that ATRA is a potential therapeutic agent for the treatment of NEPCa tumors by reversing them to a more treatable AdPCa.
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Affiliation(s)
- Siyuan Cheng
- Department of Biochemistry and Molecular Biology, LSU Health-Shreveport, Shreveport, LA, USA
| | - Shu Yang
- Department of Biochemistry and Molecular Biology, LSU Health-Shreveport, Shreveport, LA, USA
| | - Yingli Shi
- Department of Biochemistry and Molecular Biology, LSU Health-Shreveport, Shreveport, LA, USA
| | - Runhua Shi
- Department of Medicine, LSU Health-Shreveport, Shreveport, LA, USA
| | - Yunshin Yeh
- Pathology and Laboratory Medicine Service, Overton Brooks VA Medical Center, Shreveport, LA, USA.,Department of Urology, LSU Health-Shreveport, Shreveport, LA, USA
| | - Xiuping Yu
- Department of Biochemistry and Molecular Biology, LSU Health-Shreveport, Shreveport, LA, USA. .,Department of Urology, LSU Health-Shreveport, Shreveport, LA, USA.
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8
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Petrie K, Urban‐Wójciuk Z, Sbirkov Y, Graham A, Hamann A, Brown G. Retinoic acid receptor γ is a therapeutically targetable driver of growth and survival in prostate cancer. Cancer Rep (Hoboken) 2020; 3:e1284. [PMID: 32881426 PMCID: PMC7941583 DOI: 10.1002/cnr2.1284] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 07/15/2020] [Accepted: 07/21/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Prostate cancer (PC) tissue contains all-trans retinoic acid (ATRA) at a very low level (10-9 M), at least an order of magnitude lower than in adjacent normal healthy prostate cells or benign prostate hyperplasia. When this is coupled with deregulated expression of the intracellular lipid-binding proteins FABP5 and CRABP2 that is frequently found in PC, this is likely to result in the preferential delivery of ATRA to oncogenic PPARβ/δ rather than retinoic acid receptors (RARs). There are three isotypes of RARs (RARα, RARβ, and RARγ) and recent studies have revealed discrete physiological roles. For example, RARα and RARγ promote differentiation and self-renewal, respectively, which are critical for proper hematopoiesis. AIMS We have previously shown that ATRA stimulates transactivation of RARγ at sub-nanomolar concentrations (EC50 0.24 nM), whereas an 80-fold higher concentration was required for RARα-mediated transactivation (EC50 19.3 nM). Additionally, we have shown that RAR pan-antagonists inhibit the growth of PC cells (at 16-34 nM). These findings, together with the low level of ATRA in PC, led us to hypothesize that RARγ plays a role in PC pathogenesis and that RARγ-selective antagonism may be an effective treatment. METHODS AND RESULTS We found that concentrations of 10-9 M and below of ATRA promoted survival/proliferation and opposed adipogenic differentiation of human PC cell lines by a mechanism that involves RARγ. We also found that a RARγ-selective antagonist (AGN205728) potently induced mitochondria-dependent, but caspase-independent, cell death in PC cell lines. Furthermore, AGN205728 demonstrated synergism in killing PC cells in combination with cytotoxic chemotherapeutic agents. CONCLUSION We suggest that the use of RARγ-selective antagonists may be effective in PC (and potentially other cancers), either as a single agent or in combination with cytotoxic chemotherapy.
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Affiliation(s)
- Kevin Petrie
- School of MedicineFaculty of Health Sciences and Wellbeing University of SunderlandSunderlandUK
| | | | | | | | | | - Geoffrey Brown
- School of Biomedical Sciences, Institute of Clinical Sciences and Institute of Immunology and Immunotherapy, College of Medical and Dental SciencesThe University of BirminghamBirminghamUK
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9
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Xie B, Bai B, Xu Y, Liu Y, Lv Y, Gao X, Wu F, Fang Z, Lou Y, Pan H, Han W. Tumor-suppressive function and mechanism of HOXB13 in right-sided colon cancer. Signal Transduct Target Ther 2019; 4:51. [PMID: 31815008 PMCID: PMC6882800 DOI: 10.1038/s41392-019-0086-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/07/2019] [Accepted: 10/10/2019] [Indexed: 01/05/2023] Open
Abstract
Right-sided colon cancer (RCC) and left-sided colon cancer (LCC) differ in their clinical and molecular features. An investigation of differentially expressed genes (DEGs) between RCC and LCC could contribute to targeted therapy for colon cancer, especially RCC, which has a poor prognosis. Here, we identified HOXB13, which was significantly less expressed in RCC than in LCC and associated with prognosis in RCC, by using 5 datasets from the Gene Expression Omnibus (GEO). Tissue sample analysis showed that HOXB13 was differentially expressed between normal and only RCC tumor tissues. HOXB13 inhibited colon cancer cell proliferation and induced apoptosis both in vitro and in vivo. Furthermore, we found that HOXB13 might be regulated by DNMT3B and suppress C-myc expression to exert antitumor effects via β-catenin/TCF4 signals in RCC. In conclusion, the current study is the first to demonstrate that HOXB13 has a tumor-suppressive effect in RCC. High expression levels of HOXB13 are associated with prolonged overall survival in patients with RCC. The DNMT3B-HOXB13-C-myc signaling axis might be a molecular target for the treatment of RCC.
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Affiliation(s)
- Binbin Xie
- Department of Medical Oncology; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Bingjun Bai
- Department of Colorectal Surgery; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Yuzi Xu
- Department of Stomatology; Stomatology Hospital; School of Medicine, Zhejiang University, Hangzhou, 310000 PR China
| | - Yunlong Liu
- Department of Medical Oncology; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Yiming Lv
- Department of Colorectal Surgery; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Xing Gao
- Department of Medical Oncology; The Second Affiliated Hospital of Suzhou University; School of Medicine, Suzhou University, Suzhou, 215000 PR China
| | - Fei Wu
- School of Medicine, Anhui University of Science and Technology, Huainan, 232001 PR China
| | - Zhipeng Fang
- Department of Medical Oncology; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Ying Lou
- Department of Medical Oncology; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Hongming Pan
- Department of Medical Oncology; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
| | - Weidong Han
- Department of Medical Oncology; Sir Run Run Shaw Hospital; School of Medicine, Zhejiang University, Hangzhou, 310016 PR China
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10
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Wang R, Liu X. Epigenetic regulation of prostate cancer. Genes Dis 2019; 7:606-613. [PMID: 33335960 PMCID: PMC7729106 DOI: 10.1016/j.gendis.2019.10.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 10/16/2019] [Accepted: 10/30/2019] [Indexed: 12/21/2022] Open
Abstract
Prostate cancer is (PCa) the second leading cause of cancer death in males in the United State, with 174,650 new cases and 31,620 deaths estimated in 2019. It has been documented that epigenetic deregulation such as histone modification and DNA methylation contributes to PCa initiation and progression. EZH2 (enhancer of zeste homolog 2), the catalytic subunit of the Polycomb Repressive Complex (PRC2) responsible for H3K27me3 and gene repression, has been identified as a promising target in PCa. In addition, overexpression of other epigenetic regulators such as DNA methyltransferases (DNMT) is also observed in PCa. These epigenetic regulators undergo extensive post-translational modifications, in particular, phosphorylation. AKT, CDKs, PLK1, PKA, ATR and DNA-PK are the established kinases responsible for phosphorylation of various epigenetic regulators.
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Affiliation(s)
- Ruixin Wang
- Department of Biochemistry, Purdue University, West Lafayette, IN, 47907, USA.,Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40536, USA
| | - Xiaoqi Liu
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, 40536, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, 40536, USA
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11
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Shiota M, Fujimoto N, Kashiwagi E, Eto M. The Role of Nuclear Receptors in Prostate Cancer. Cells 2019; 8:cells8060602. [PMID: 31212954 PMCID: PMC6627805 DOI: 10.3390/cells8060602] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/12/2019] [Accepted: 06/13/2019] [Indexed: 12/12/2022] Open
Abstract
The nuclear receptor (NR) superfamily consists of 48 members that are divided into seven subfamilies. NRs are transcription factors that play an important role in a number of biological processes. The NR superfamily includes androgen receptor, which is a key player in prostate cancer pathogenesis, suggesting the functional roles of other NRs in prostate cancer. The findings on the roles of NRs in prostate cancer thus far have shown that several NRs such as vitamin D receptor, estrogen receptor β, and mineralocorticoid receptor play antioncogenic roles, while other NRs such as peroxisome proliferator-activated receptor γ and estrogen receptor α as well as androgen receptor play oncogenic roles. However, the roles of other NRs in prostate cancer remain controversial or uninvestigated. Further research on the role of NRs in prostate cancer is required and may lead to the development of novel preventions and therapeutics for prostate cancer.
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Affiliation(s)
- Masaki Shiota
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
| | - Naohiro Fujimoto
- Department of Urology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807-8555, Japan.
| | - Eiji Kashiwagi
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
| | - Masatoshi Eto
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
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12
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Nair SS, Das S S, Nair RP, Indira M. Supplementation of all trans retinoic acid ameliorates ethanol-induced endoplasmic reticulum stress. Arch Physiol Biochem 2018; 124:131-138. [PMID: 28857622 DOI: 10.1080/13813455.2017.1369548] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
CONTEXT Molecular pathogenesis of chronic alcoholism is linked to increased endoplasmic reticulum stress. Ethanol is a competitive inhibitor of vitamin A metabolism and vitamin A supplementation aggravates existing liver problems. Hence, we probed into the impact of supplementation of all trans retinoic acid (ATRA), the active metabolite of vitamin A on ethanol-induced endoplasmic reticulcum stress. METHODS Male Sprague-Dawley rats were divided into four groups - I: Control; II: Ethanol; III: ATRA; IV: ATRA + Ethanol. After 90 days the animals were sacrificed to study markers of lipid peroxidation in hepatic microsomal fraction and expression of ER stress proteins and apoptosis in liver. RESULTS AND CONCLUSION Ethanol caused hepatic hyperlipidemia, enhanced microsomal lipid peroxidation, upregulated expression of unfolded protein response associated proteins and that of apoptosis. Ethanol also led to downregulation of retinoid receptors. ATRA supplementation reversed all these alterations indicating the decrease in ethanol-induced endoplasmic reticulum stress.
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Affiliation(s)
- Saritha S Nair
- a Department of Biochemistry , University of Kerala , Thiruvananthapuram , Kerala , India
| | - Syam Das S
- a Department of Biochemistry , University of Kerala , Thiruvananthapuram , Kerala , India
| | - Reshma P Nair
- b Agroprocessing and Technology Division , CSIR-NIIST , Thiruvananthapuram , Kerala , India
| | - M Indira
- a Department of Biochemistry , University of Kerala , Thiruvananthapuram , Kerala , India
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13
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Voisset E, Moravcsik E, Stratford EW, Jaye A, Palgrave CJ, Hills RK, Salomoni P, Kogan SC, Solomon E, Grimwade D. Pml nuclear body disruption cooperates in APL pathogenesis and impairs DNA damage repair pathways in mice. Blood 2018; 131:636-648. [PMID: 29191918 PMCID: PMC5805489 DOI: 10.1182/blood-2017-07-794784] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 11/26/2017] [Indexed: 01/20/2023] Open
Abstract
A hallmark of acute promyelocytic leukemia (APL) is altered nuclear architecture, with disruption of promyelocytic leukemia (PML) nuclear bodies (NBs) mediated by the PML-retinoic acid receptor α (RARα) oncoprotein. To address whether this phenomenon plays a role in disease pathogenesis, we generated a knock-in mouse model with NB disruption mediated by 2 point mutations (C62A/C65A) in the Pml RING domain. Although no leukemias developed in PmlC62A/C65A mice, these transgenic mice also expressing RARα linked to a dimerization domain (p50-RARα model) exhibited a doubling in the rate of leukemia, with a reduced latency period. Additionally, we found that response to targeted therapy with all-trans retinoic acid in vivo was dependent on NB integrity. PML-RARα is recognized to be insufficient for development of APL, requiring acquisition of cooperating mutations. We therefore investigated whether NB disruption might be mutagenic. Compared with wild-type cells, primary PmlC62A/C65A cells exhibited increased sister-chromatid exchange and chromosome abnormalities. Moreover, functional assays showed impaired homologous recombination (HR) and nonhomologous end-joining (NHEJ) repair pathways, with defective localization of Brca1 and Rad51 to sites of DNA damage. These data directly demonstrate that Pml NBs are critical for DNA damage responses, and suggest that Pml NB disruption is a central contributor to APL pathogenesis.
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MESH Headings
- Animals
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- DNA Damage/genetics
- DNA End-Joining Repair/genetics
- DNA Repair/genetics
- Intranuclear Inclusion Bodies/genetics
- Intranuclear Inclusion Bodies/metabolism
- Leukemia, Promyelocytic, Acute/genetics
- Leukemia, Promyelocytic, Acute/metabolism
- Leukemia, Promyelocytic, Acute/pathology
- Mice
- Mice, Transgenic
- Mutagenesis/genetics
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Promyelocytic Leukemia Protein/genetics
- Promyelocytic Leukemia Protein/physiology
- Signal Transduction/genetics
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Affiliation(s)
- Edwige Voisset
- Department of Medical and Molecular Genetics, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Eva Moravcsik
- Department of Medical and Molecular Genetics, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Eva W Stratford
- Department of Tumor Biology, The Norwegian Radium Hospital/Oslo University Hospital, Oslo, Norway
| | - Amie Jaye
- Department of Medical and Molecular Genetics, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | | | - Robert K Hills
- Centre for Trials Research, College of Biomedical & Life Sciences, Cardiff University, Cardiff, United Kingdom
| | | | - Scott C Kogan
- Helen Diller Family Comprehensive Cancer Center and
- Department of Laboratory Medicine, University of California, San Francisco, CA
| | - Ellen Solomon
- Department of Medical and Molecular Genetics, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - David Grimwade
- Department of Medical and Molecular Genetics, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
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14
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Regulation of retinal pigment epithelial cell phenotype by Annexin A8. Sci Rep 2017; 7:4638. [PMID: 28680125 PMCID: PMC5498634 DOI: 10.1038/s41598-017-03493-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/28/2017] [Indexed: 12/30/2022] Open
Abstract
The retinoic acid derivative fenretinide (FR) is capable of transdifferentiating cultured retinal pigment epithelial (RPE) cells towards a neuronal-like phenotype, but the underlying mechanisms are not understood. To identify genes involved in this process we performed a microarray analysis of RPE cells pre- and post-FR treatment, and observed a marked down-regulation of AnnexinA8 (AnxA8) in transdifferentiated cells. To determine whether AnxA8 plays a role in maintaining RPE cell phenotype we directly manipulated AnxA8 expression in cultured and primary RPE cells using siRNA-mediated gene suppression, and over-expression of AnxA8-GFP in conjunction with exposure to FR. Treatment of RPE cells with AnxA8 siRNA recapitulated exposure to FR, with cell cycle arrest, neuronal transdifferentiation, and concomitant up-regulation of the neuronal markers calretinin and calbindin, as assessed by real-time PCR and immunofluorescence. In contrast, AnxA8 transient over-expression in ARPE-19 cells prevented FR-induced differentiation. Ectopic expression of AnxA8 in AnxA8-depleted cells led to decreased neuronal marker staining, and normal cell growth as judged by phosphohistone H3 staining, cell counting and cleaved caspase-3 levels. These data show that down-regulation of AnxA8 is both necessary and sufficient for neuronal transdifferentiation of RPE cells and reveal an essential role for AnxA8 as a key regulator of RPE phenotype.
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15
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Peitzsch C, Cojoc M, Hein L, Kurth I, Mäbert K, Trautmann F, Klink B, Schröck E, Wirth MP, Krause M, Stakhovsky EA, Telegeev GD, Novotny V, Toma M, Muders M, Baretton GB, Frame FM, Maitland NJ, Baumann M, Dubrovska A. An Epigenetic Reprogramming Strategy to Resensitize Radioresistant Prostate Cancer Cells. Cancer Res 2016; 76:2637-51. [DOI: 10.1158/0008-5472.can-15-2116] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 02/22/2016] [Indexed: 11/16/2022]
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16
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Gong C, Fujino K, Monteiro LJ, Gomes AR, Drost R, Davidson-Smith H, Takeda S, Khoo US, Jonkers J, Sproul D, Lam EWF. FOXA1 repression is associated with loss of BRCA1 and increased promoter methylation and chromatin silencing in breast cancer. Oncogene 2015; 34:5012-24. [PMID: 25531315 PMCID: PMC4430311 DOI: 10.1038/onc.2014.421] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 10/01/2014] [Accepted: 11/15/2014] [Indexed: 12/11/2022]
Abstract
FOXA1 expression correlates with the breast cancer luminal subtype and patient survival. RNA and protein analysis of a panel of breast cancer cell lines revealed that BRCA1 deficiency is associated with the downregulation of FOXA1 expression. Knockdown of BRCA1 resulted in the downregulation of FOXA1 expression and enhancement of FOXA1 promoter methylation in MCF-7 breast cancer cells, whereas the reconstitution of BRCA1 in Brca1-deficent mouse mammary epithelial cells (MMECs) promoted Foxa1 expression and methylation. These data suggest that BRCA1 suppresses FOXA1 hypermethylation and silencing. Consistently, the treatment of MMECs with the DNA methylation inhibitor 5-aza-2'-deoxycitydine induced Foxa1 mRNA expression. Furthermore, treatment with GSK126, an inhibitor of EZH2 methyltransferase activity, induced FOXA1 expression in BRCA1-deficient but not in BRCA1-reconstituted MMECs. Likewise, the depletion of EZH2 by small interfering RNA enhanced FOXA1 mRNA expression. Chromatin immunoprecipitation (ChIP) analysis demonstrated that BRCA1, EZH2, DNA methyltransferases (DNMT)1/3a/3b and H3K27me3 are recruited to the endogenous FOXA1 promoter, further supporting the hypothesis that these proteins interact to modulate FOXA1 methylation and repression. Further co-immunoprecipitation and ChIP analysis showed that both BRCA1 and DNMT3b form complexes with EZH2 but not with each other, consistent with the notion that BRCA1 binds to EZH2 and negatively regulates its methyltransferase activity. We also found that EZH2 promotes and BRCA1 impairs the deposit of the gene silencing histone mark H3K27me3 on the FOXA1 promoter. These associations were validated in a familial breast cancer patient cohort. Integrated analysis of the global gene methylation and expression profiles of a set of 33 familial breast tumours revealed that FOXA1 promoter methylation is inversely correlated with the transcriptional expression of FOXA1 and that BRCA1 mutation breast cancer is significantly associated with FOXA1 methylation and downregulation of FOXA1 expression, providing physiological evidence to our findings that FOXA1 expression is regulated by methylation and chromatin silencing and that BRCA1 maintains FOXA1 expression through suppressing FOXA1 gene methylation in breast cancer.
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Affiliation(s)
- C Gong
- Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, London, UK
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - K Fujino
- Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, London, UK
- Department of Obstetrics & Gynecology, Faculty of Medicine, Juntendo University, Bunkyoku, Tokyo, Japan
| | - L J Monteiro
- Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, London, UK
| | - A R Gomes
- Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, London, UK
| | - R Drost
- Division of Molecular Pathology and Cancer Genomics Centre Netherlands, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - H Davidson-Smith
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - S Takeda
- Department of Obstetrics & Gynecology, Faculty of Medicine, Juntendo University, Bunkyoku, Tokyo, Japan
| | - U S Khoo
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - J Jonkers
- Division of Molecular Pathology and Cancer Genomics Centre Netherlands, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - D Sproul
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
| | - E W-F Lam
- Department of Surgery and Cancer, Imperial College London, Hammersmith Hospital Campus, London, UK
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17
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Zhu Z, Zhu J, Zhao X, Yang K, Lu L, Zhang F, Shen W, Zhang R. All-Trans Retinoic Acid Ameliorates Myocardial Ischemia/Reperfusion Injury by Reducing Cardiomyocyte Apoptosis. PLoS One 2015; 10:e0133414. [PMID: 26186635 PMCID: PMC4506146 DOI: 10.1371/journal.pone.0133414] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 06/26/2015] [Indexed: 12/21/2022] Open
Abstract
Myocardial ischemia/reperfusion (I/R) injury interferes with the restoration of blood flow to ischemic myocardium. Oxidative stress-elicited apoptosis has been reported to contribute to I/R injury. All-trans retinoic acid (ATRA) has anti-apoptotic activity as previously reported. Here, we investigated the effects and the mechanism of action of ATRA on myocardial I/R injury both in vivo and in vitro. In vivo, ATRA reduced the size of the infarcted area (17.81±1.05% vs. 24.41±1.03%, P<0.05) and rescued cardiac function loss (ejection fraction 46.42±6.76% vs. 37.18±4.63%, P<0.05) after I/R injury. Flow-cytometric analysis and TUNEL assay demonstrated that the protective role of ATRA on myocardial I/R injury was related to its anti-apoptotic effects. The anti-apoptotic effects of ATRA were associated with partial inhibition of reactive oxygen species (ROS) production and significantly less phosphorylation of mitogen-activated protein kinases (MAPKs) including p38, JNK, and ERK. Western blot analysis also revealed that ATRA pre-treatment increased a disintegrin and metalloproteinase domain-containing protein 10 (ADAM10) expression (0.65 ± 0.20 vs. 0.41±0.02 in vivo) and reduced the level of receptor for advanced glycation end-products (RAGE) (0.38 ± 0.17 vs. 0.52 ± 0.11 in vivo). Concomitantly, the protective role of ATRA on I/R injury was not observed in RAGE-KO mice. The current results indicated that ATRA could prevent myocardial injury and reduced cardiomyocyte apoptosis after I/R effectively. One possible mechanism underlying these effects is that ATRA could increase ADAM10 expression and thus cleave RAGE, which is the main receptor up-stream of MAPKs in myocardial I/R injury, resulting in the down-regulation of MAPK signaling and protective role on myocardial I/R injury.
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Affiliation(s)
- Zhengbin Zhu
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Jinzhou Zhu
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Xiaoran Zhao
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Ke Yang
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Lin Lu
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Fengru Zhang
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Weifeng Shen
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
| | - Ruiyan Zhang
- Department of Cardiology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- Institute of Cardiovascular Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, PR China
- * E-mail:
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18
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Chen MC, Hsu SL, Lin H, Yang TY. Retinoic acid and cancer treatment. Biomedicine (Taipei) 2014; 4:22. [PMID: 25520935 PMCID: PMC4265016 DOI: 10.7603/s40681-014-0022-1] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 11/05/2014] [Indexed: 12/18/2022] Open
Abstract
Retinoic acid which belongs to the retinoid class of chemical compounds is an important metabolite of vitamin A in diets. It is currently understood that retinoic acid plays important roles in cell development and differentiation as well as cancer treatment. Lung, prostate, breast, ovarian, bladder, oral, and skin cancers have been demonstrated to be suppressed by retinoic acid. Our results also show that low doses and high doses of retinoic acid may respectively cause cell cycle arrest and apoptosis of cancer cells. Also, the common cell cycle inhibiting protein, p27, and the new cell cycle regulator, Cdk5, are involved in retinoic acid’s effects. These results provide new evidence indicating that the molecular mechanisms of/in retinoic acid may control cancer cells’ fates. Since high doses of retinoic acid may lead to cytotoxicity, it is probably best utilized as a potential supplement in one’s daily diet to prevent or suppress cancer progression. In this review, we have collected numerous references demonstrating the findings of retinoic acid in melanoma, hepatoma, lung cancer, breast cancer, and prostate cancer. We hope these observations will shed light on the future investigation of retinoic acid in cancer prevention and therapy.
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Affiliation(s)
- Mei-Chih Chen
- Department of Medical Research, Taichung Veterans General Hospital, Taichung 407, Taichung, Taiwan
| | - Shih-Lan Hsu
- Department of Medical Research, Taichung Veterans General Hospital, Taichung 407, Taichung, Taiwan
| | - Ho Lin
- Department of Life Sciences, National Chung Hsing University, No. 250, Kuokuang Rd., Taichung 402, Taichung, Taiwan
| | - Tsung-Ying Yang
- Department of Chest Medicine, Taichung Veterans General Hospital, No. 160, Taichung Harbor Rd., Sec. 3, Taichung 407, Taichung, Taiwan
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19
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Role of DNA methylation in the adaptive responses induced in a human B lymphoblast cell line by long-term low-dose exposures to γ-rays and cadmium. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2014; 773:34-8. [PMID: 25308704 DOI: 10.1016/j.mrgentox.2014.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 08/19/2014] [Accepted: 08/25/2014] [Indexed: 10/24/2022]
Abstract
The possible involvement of epigenetic factors in health risks due to exposures to environmental toxicants and ionizing radiation is poorly understood. We have tested the hypothesis that DNA methylation contributes to the adaptive response (AR) to ionizing radiation or Cd. Human B lymphoblast cells HMy2.CIR were irradiated (0.032 Gy γ-rays) three times per week for 4 weeks or exposed to CdCl2 (0.005, 0.01, or 0.1 μM) for 3 months, and then challenged with a high dose of Cd (50 or 100 μM) or γ-rays (2 Gy). Long-term low-dose radiation (LDR) or long-term low-dose Cd exposure induced AR against challenging doses of Cd and irradiation, respectively. When the primed cells were treated with 5-aza-2'-deoxycytidine (5-aza-dC), a DNA methyltransferase inhibitor, the ARs were eliminated. These results indicate that DNA methylation is involved in the induction of AR in HMy2.CIR cells.
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20
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Li M, Sun Y, Guan X, Shu X, Li C. Advanced progress on the relationship between RA and its receptors and malignant tumors. Crit Rev Oncol Hematol 2014; 91:271-82. [DOI: 10.1016/j.critrevonc.2014.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 03/20/2014] [Accepted: 04/02/2014] [Indexed: 12/27/2022] Open
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21
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Decker B, Ostrander EA. Dysregulation of the homeobox transcription factor gene HOXB13: role in prostate cancer. PHARMACOGENOMICS & PERSONALIZED MEDICINE 2014; 7:193-201. [PMID: 25206306 PMCID: PMC4157396 DOI: 10.2147/pgpm.s38117] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Prostate cancer (PC) is the most common noncutaneous cancer in men, and epidemiological studies suggest that about 40% of PC risk is heritable. Linkage analyses in hereditary PC families have identified multiple putative loci. However, until recently, identification of specific risk alleles has proven elusive. Cooney et al used linkage mapping and segregation analysis to identify a putative risk locus on chromosome 17q21-22. In search of causative variant(s) in genes from the candidate region, a novel, potentially deleterious G84E substitution in homeobox transcription factor gene HOXB13 was observed in multiple hereditary PC families. In follow-up testing, the G84E allele was enriched in cases, especially those with an early diagnosis or positive family history of disease. This finding was replicated by others, confirming HOXB13 as a PC risk gene. The HOXB13 protein plays diverse biological roles in embryonic development and terminally differentiated tissue. In tumor cell lines, HOXB13 participates in a number of biological functions, including coactivation and localization of the androgen receptor and FOXA1. However, no consensus role has emerged and many questions remain. All HOXB13 variants with a proposed role in PC risk are predicted to damage the protein and lie in domains that are highly conserved across species. The G84E variant has the strongest epidemiological support and lies in a highly conserved MEIS protein-binding domain, which binds cofactors required for activation. On the basis of epidemiological and biological data, the G84E variant likely modulates the interaction between the HOXB13 protein and the androgen receptor, as well as affecting FOXA1-mediated transcriptional programming. However, further studies of the mutated protein are required to clarify the mechanisms by which this translates into PC risk.
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Affiliation(s)
- Brennan Decker
- Cancer Genetics and Comparative Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA ; Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - Elaine A Ostrander
- Cancer Genetics and Comparative Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
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22
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Ye S, Yuan D, Xie Y, Pan Y, Shao C. Role of DNA methylation in long-term low-dose γ-rays induced adaptive response in human B lymphoblast cells. Int J Radiat Biol 2013; 89:898-906. [PMID: 23692433 DOI: 10.3109/09553002.2013.806832] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE With widespread use of ionizing radiation, more attention has been attracted to low-dose radiation (LDR); however, the mechanisms of long-term LDR-induced bio-effects are unclear. Here, we applied human B lymphoblast cell line HMy2.CIR to monitor the effects of long-term LDR and the potential involvement of DNA methylation. MATERIALS AND METHODS HMy2.CIR cells were irradiated with 0.032 Gy γ-rays three times per week for 1-4 weeks. Some of these primed cells were further challenged with 2 Gy γ-rays. Cell proliferation, micronuclei formation, gene expression of DNA methyltransferases (DNMT), levels of global genomic DNA methylation and protein expression of methyl CpG binding protein 2 (MeCP2) and heterochromatin protein-1 (HP1) were measured. RESULTS Long-term LDR enhanced cell proliferation and clonogenicity and triggered a cellular adaptive response (AR). Furthermore, global genomic DNA methylation was increased in HMy2.CIR cells after long-term LDR, accompanied with an increase of gene expression of DNMT1 and protein expression of MeCP2 and HP1. After treatment with 5-aza-2'-deoxycytidine (5-aza-dC), a DNA methyltransferase inhibitor, the long-term LDR-induced global genomic DNA hypermethylation was decreased and the AR was eliminated. CONCLUSION Global genomic DNA hypermethylation accompanied with increases of DNMT1 and MeCP2 expression and heterochromatin formation might be involved in long-term LDR-induced adaptive response.
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Affiliation(s)
- Shuang Ye
- Institute of Radiation Medicine, Fudan University , Shanghai , P. R. China
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23
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Hepatitis C virus Core protein overcomes all-trans retinoic acid-induced cell growth arrest by inhibiting retinoic acid receptor-β2 expression via DNA methylation. Cancer Lett 2013; 335:372-9. [DOI: 10.1016/j.canlet.2013.02.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 02/21/2013] [Accepted: 02/24/2013] [Indexed: 02/08/2023]
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24
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Overexpression of CD73 in prostate cancer is associated with lymph node metastasis. Pathol Oncol Res 2013; 19:811-4. [PMID: 23653114 DOI: 10.1007/s12253-013-9648-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 04/24/2013] [Indexed: 12/30/2022]
Abstract
Prostate cancer is the most common malignancy in men in Europe and North America. At present, it is becoming an increasingly common cancer in China. CD73 (ecto-5'-nucleotidase) is a glycosylphosphatidylinositol (GPI)-linked 70-kDa cell surface enzyme. It is also broadly expressed in many types of tissues. Recent studies have showed that CD73 is widely expressed on malignancies and is up-regulated in cancerous tissues. Consequently, we analyzed the expression of CD73 in prostate cancer tissue. The expression of the CD73 protein was evaluated by Immunohistochemistry staining in 116 tissue specimens. The expression was further examined by quantitative real-time PCR (qRT-PCR) and Western blot in the same set of patients. The intense cell membrane staining for the CD73 protein was observed. The expression of CD73 in lymph node non-metastasizing prostate cancer tissues can be seen at low levels, and is generally undetectable. RT-PCR and Western blot showed that the expression of CD73 in lymph node metastasizing prostate cancer was higher compared with non-metastasizing ones. These results suggest that CD73 could be considered as a relevant-specific target for molecular therapy of prostate cancer metastasis.
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25
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EZH2, an epigenetic driver of prostate cancer. Protein Cell 2013; 4:331-41. [PMID: 23636686 DOI: 10.1007/s13238-013-2093-2] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 12/02/2012] [Indexed: 12/20/2022] Open
Abstract
The histone methyltransferase EZH2 has been in the limelight of the field of cancer epigenetics for a decade now since it was first discovered to exhibit an elevated expression in metastatic prostate cancer. It persists to attract much scientific attention due to its important role in the process of cancer development and its potential of being an effective therapeutic target. Thus here we review the dysregulation of EZH2 in prostate cancer, its function, upstream regulators, downstream effectors, and current status of EZH2-targeting approaches. This review therefore provides a comprehensive overview of EZH2 in the context of prostate cancer.
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