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Saleh Z, Moccia MC, Ladd Z, Joneja U, Li Y, Spitz F, Hong YK, Gao T. Pancreatic Neuroendocrine Tumors: Signaling Pathways and Epigenetic Regulation. Int J Mol Sci 2024; 25:1331. [PMID: 38279330 PMCID: PMC10816436 DOI: 10.3390/ijms25021331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/28/2024] Open
Abstract
Pancreatic neuroendocrine tumors (PNETs) are characterized by dysregulated signaling pathways that are crucial for tumor formation and progression. The efficacy of traditional therapies is limited, particularly in the treatment of PNETs at an advanced stage. Epigenetic alterations profoundly impact the activity of signaling pathways in cancer development, offering potential opportunities for drug development. There is currently a lack of extensive research on epigenetic regulation in PNETs. To fill this gap, we first summarize major signaling events that are involved in PNET development. Then, we discuss the epigenetic regulation of these signaling pathways in the context of both PNETs and commonly occurring-and therefore more extensively studied-malignancies. Finally, we will offer a perspective on the future research direction of the PNET epigenome and its potential applications in patient care.
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Affiliation(s)
- Zena Saleh
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
| | - Matthew C. Moccia
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
| | - Zachary Ladd
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
| | - Upasana Joneja
- Department of Pathology, Cooper University Health Care, Camden, NJ 08103, USA
| | - Yahui Li
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
| | - Francis Spitz
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
| | - Young Ki Hong
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
| | - Tao Gao
- Department of Surgery, Cooper University Health Care, Camden, NJ 08103, USA; (Z.S.); (Z.L.)
- Camden Cancer Research Center, Camden, NJ 08103, USA
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Das CGA, Kumar VG, Dhas TS, Karthick V, Kumar CMV. Nanomaterials in anticancer applications and their mechanism of action - A review. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2023; 47:102613. [PMID: 36252911 DOI: 10.1016/j.nano.2022.102613] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 10/01/2022] [Accepted: 10/03/2022] [Indexed: 11/06/2022]
Abstract
The current challenges in cancer treatment using conventional therapies have made the emergence of nanotechnology with more advancements. The exponential growth of nanoscience has drawn to develop nanomaterials (NMs) with therapeutic activities. NMs have enormous potential in cancer treatment by altering the drug toxicity profile. Nanoparticles (NPs) with enhanced surface characteristics can diffuse more easily inside tumor cells, thus delivering an optimal concentration of drugs at tumor site while reducing the toxicity. Cancer cells can be targeted with greater affinity by utilizing NMs with tumor specific constituents. Furthermore, it bypasses the bottlenecks of indiscriminate biodistribution of the antitumor agent and high administration dosage. Here, we focus on the recent advances on the use of various nanomaterials for cancer treatment, including targeting cancer cell surfaces, tumor microenvironment (TME), organelles, and their mechanism of action. The paradigm shift in cancer management is achieved through the implementation of anticancer drug delivery using nano routes.
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Affiliation(s)
- C G Anjali Das
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai 600119, India; Earth Science and Technology Cell (Marine Biotechnological Studies), Sathyabama Institute of Science and Technology, Rajiv Gandhi Salai, Chennai 600119, India.
| | - V Ganesh Kumar
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai 600119, India; Earth Science and Technology Cell (Marine Biotechnological Studies), Sathyabama Institute of Science and Technology, Rajiv Gandhi Salai, Chennai 600119, India.
| | - T Stalin Dhas
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai 600119, India; Earth Science and Technology Cell (Marine Biotechnological Studies), Sathyabama Institute of Science and Technology, Rajiv Gandhi Salai, Chennai 600119, India.
| | - V Karthick
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai 600119, India; Earth Science and Technology Cell (Marine Biotechnological Studies), Sathyabama Institute of Science and Technology, Rajiv Gandhi Salai, Chennai 600119, India.
| | - C M Vineeth Kumar
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai 600119, India; Earth Science and Technology Cell (Marine Biotechnological Studies), Sathyabama Institute of Science and Technology, Rajiv Gandhi Salai, Chennai 600119, India.
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Wawruszak A, Luszczki J, Halasa M, Okon E, Landor S, Sahlgren C, Rivero-Muller A, Stepulak A. Sensitization of MCF7 Cells with High Notch1 Activity by Cisplatin and Histone Deacetylase Inhibitors Applied Together. Int J Mol Sci 2021; 22:5184. [PMID: 34068438 PMCID: PMC8153599 DOI: 10.3390/ijms22105184] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/11/2021] [Accepted: 05/11/2021] [Indexed: 12/11/2022] Open
Abstract
Histone deacetylase inhibitors (HDIs) are promising anti-cancer agents that inhibit proliferation of many types of cancer cells including breast carcinoma (BC) cells. In the present study, we investigated the influence of the Notch1 activity level on the pharmacological interaction between cisplatin (CDDP) and two HDIs, valproic acid (VPA) and suberoylanilide hydroxamic acid (SAHA, vorinostat), in luminal-like BC cells. The type of drug-drug interaction between CDDP and HDIs was determined by isobolographic analysis. MCF7 cells were genetically modified to express differential levels of Notch1 activity. The cytotoxic effect of SAHA or VPA was higher on cells with decreased Notch1 activity and lower for cells with increased Notch1 activity than native BC cells. The isobolographic analysis demonstrated that combinations of CDDP with SAHA or VPA at a fixed ratio of 1:1 exerted additive or additive with tendency toward synergism interactions. Therefore, treatment of CDDP with HDIs could be used to optimize a combined therapy based on CDDP against Notch1-altered luminal BC. In conclusion, the combined therapy of HDIs and CDDP may be a promising therapeutic tool in the treatment of luminal-type BC with altered Notch1 activity.
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Affiliation(s)
- Anna Wawruszak
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.H.); (E.O.); (A.R.-M.); (A.S.)
| | - Jarogniew Luszczki
- Department of Pathophysiology, Medical University, 20-090 Lublin, Poland;
| | - Marta Halasa
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.H.); (E.O.); (A.R.-M.); (A.S.)
| | - Estera Okon
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.H.); (E.O.); (A.R.-M.); (A.S.)
| | - Sebastian Landor
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, 20500 Turku, Finland; (S.L.); (C.S.)
| | - Cecilia Sahlgren
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, 20500 Turku, Finland; (S.L.); (C.S.)
- Turku Bioscience Centre, Åbo Akademi University and University of Turku, 20500 Turku, Finland
- Institute for Complex Molecular Systems, Eindhoven University of Technology, 5612 Eindhoven, The Netherlands
| | - Adolfo Rivero-Muller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.H.); (E.O.); (A.R.-M.); (A.S.)
| | - Andrzej Stepulak
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.H.); (E.O.); (A.R.-M.); (A.S.)
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Updates on the Role of Molecular Alterations and NOTCH Signalling in the Development of Neuroendocrine Neoplasms. J Clin Med 2019; 8:jcm8091277. [PMID: 31443481 PMCID: PMC6780206 DOI: 10.3390/jcm8091277] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/13/2019] [Accepted: 08/20/2019] [Indexed: 12/17/2022] Open
Abstract
Neuroendocrine neoplasms (NENs) comprise a heterogeneous group of rare malignancies, mainly originating from hormone-secreting cells, which are widespread in human tissues. The identification of mutations in ATRX/DAXX genes in sporadic NENs, as well as the high burden of mutations scattered throughout the multiple endocrine neoplasia type 1 (MEN-1) gene in both sporadic and inherited syndromes, provided new insights into the molecular biology of tumour development. Other molecular mechanisms, such as the NOTCH signalling pathway, have shown to play an important role in the pathogenesis of NENs. NOTCH receptors are expressed on neuroendocrine cells and generally act as tumour suppressor proteins, but in some contexts can function as oncogenes. The biological heterogeneity of NENs suggests that to fully understand the role and the potential therapeutic implications of gene mutations and NOTCH signalling in NENs, a comprehensive analysis of genetic alterations, NOTCH expression patterns and their potential role across all NEN subtypes is required.
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Additive Pharmacological Interaction between Cisplatin (CDDP) and Histone Deacetylase Inhibitors (HDIs) in MDA-MB-231 Triple Negative Breast Cancer (TNBC) Cells with Altered Notch1 Activity-An Isobolographic Analysis. Int J Mol Sci 2019; 20:ijms20153663. [PMID: 31357442 PMCID: PMC6696008 DOI: 10.3390/ijms20153663] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/19/2019] [Accepted: 07/24/2019] [Indexed: 12/24/2022] Open
Abstract
The aim of this study was to investigate the influence of the Notch1 activity level on the pharmacological interaction between cisplatin (CDDP) and two histone deacetylase inhibitors (HDIs)-valproic acid (VPA) and vorinostat (SAHA) in the triple negative breast cancer (TNBC) cells. Stable breast cancer (BC) cell lines with increased and decreased activity of Notch1 were generated using a transfection method. The type of interaction between CDDP and the HDIs was determined by isobolographic analysis of cell proliferation in MDA-MB-231 cells with differential levels of Notch1 activity in vitro. The combination of CDDP/SAHA and CDDP/VPA in the MDA-MB-231 triple negative breast cancer (TNBC) cells with increased activity of Notch1, as well as CDDP/VPA in the MDA-MB-231 cells with decreased activity of Notch1, yielded an additive interaction, whereas additivity with a tendency towards antagonism was observed for the combination of CDDP/SAHA in MDA-MB-231 cells with the decreased activity of Notch1. Our studies demonstrated that SAHA and VPA might be considered as potential therapeutic agents in combination therapy with CDDP against TNBC with altered Notch1 activity.
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Méndez A, Rojas DA, Ponce CA, Bustamante R, Beltrán CJ, Toledo J, García-Angulo VA, Henriquez M, Vargas SL. Primary infection by Pneumocystis induces Notch-independent Clara cell mucin production in rat distal airways. PLoS One 2019; 14:e0217684. [PMID: 31170201 PMCID: PMC6553854 DOI: 10.1371/journal.pone.0217684] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 05/17/2019] [Indexed: 11/27/2022] Open
Abstract
Clara cells are the main airway secretory cells able to regenerate epithelium in the distal airways through transdifferentiating into goblet cells, a process under negative regulation of the Notch pathway. Pneumocystis is a highly prevalent fungus in humans occurring between 2 and 5 months of age, a period when airways are still developing and respiratory morbidity typically increases. Pneumocystis induces mucus hyperproduction in immunocompetent host airways and whether it can stimulate Clara cells is unknown. Markers of Clara cell secretion and Notch1 activation were investigated in lungs of immunocompetent rats at 40, 60, and 80 days of age during Pneumocystis primary infection with and without Valproic acid (VPA), a Notch inducer. The proportion of rats expressing mucin increased in Pneumocystis-infected rats respect to controls at 60 and 80 days of age. Frequency of distal airways Clara cells was maintained while mRNA levels for the mucin-encoding genes Muc5B and Muc5ac in lung homogenates increased 1.9 and 3.9 times at 60 days of infection (P. = 0.1609 and P. = 0.0001, respectively) and protein levels of the Clara cell marker CC10 decreased in the Pneumocystis-infected rats at 60 and 80 days of age (P. = 0.0118 & P. = 0.0388). CC10 and Muc5b co-localized in distal airway epithelium of Pneumocystis-infected rats at day 60. Co-localization of Muc5b and Ki67 as marker of mitosis in distal airways was not observed suggesting that Muc5b production by Clara cells was independent of mitosis. Notch levels remained similar and no transnucleation of activated Notch associated to Pneumocystis infection was detected. Unexpectedly, mucus was greatly increased at day 80 in Pneumocystis-infected rats receiving VPA suggesting that a Notch-independent mechanism was triggered. Overall, data suggests a Clara to goblet cell transdifferentiation mechanism induced by Pneumocystis and independent of Notch.
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Affiliation(s)
- Andrea Méndez
- Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Diego A. Rojas
- Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Carolina A. Ponce
- Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Rebeca Bustamante
- Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Caroll J. Beltrán
- Servicio de Gastroenterología, Hospital Clínico Universidad de Chile y Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Jorge Toledo
- Laboratorio de Análisis Imágenes Científicas, SCIAN-lab, Instituto de Neurociencias Biomédicas (BNI), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Victor A. García-Angulo
- Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Mauricio Henriquez
- Programa de Fisiología y Biofísica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
| | - Sergio L. Vargas
- Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina Universidad de Chile, Santiago, Chile
- * E-mail:
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Zhou X, Li Z, Wang X, Jiang G, Shan C, Liu S. Metabolomics reveals the effect of valproic acid on MCF-7 and MDA-MB-231 cells. Xenobiotica 2019; 50:252-260. [PMID: 31092106 DOI: 10.1080/00498254.2019.1618510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
1. Breast cancer is one of the most common malignancies in women worldwide. Metabolomics has been shown to be a promising strategy to elucidate the underlying pathogenesis of cancer and identify new targets for cancer diagnosis and therapy. Valproic acid (VPA), a histone deacetylase inhibitor, is a potential new drug in tumor therapy. This work used metabolomics to examine the effect of VPA on metabolism in breast cancer cells.2. Based on UPLC-MS/MS, we identified 3137 differential metabolites in human breast cancer MCF-7 cells and 2472 differential metabolites in human breast cancer MDA-MB-231 cells after VPA treatment.3. We selected 63 differential metabolites from MCF-7 samples and 61 differential metabolites from MDA-MB-231 cells with the more conspicuous changing trend. Furfural was up-regulated after VPA treatment in both cell lines. In both samples, VPA exerted an effect on the beta-alanine metabolism pathway and the taurine and hypotaurine metabolism pathway.4. This study identified the effect of VPA on metabolites and metabolic pathways in breast cancer cells, and these findings may contribute to the identification of new targets for breast cancer treatment.
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Affiliation(s)
- Xingzhi Zhou
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, PR China.,Department of Biology, Life Science and Technology College, Dalian University, Dalian, PR China
| | - Zhen Li
- The Fist Affiliated Hospital, Biomedical Translational Research Institute, Jinan University, Guangzhou, PR China
| | - Xuanyu Wang
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, PR China
| | - Ge Jiang
- Department of Biology, Life Science and Technology College, Dalian University, Dalian, PR China
| | - Changliang Shan
- The Fist Affiliated Hospital, Biomedical Translational Research Institute, Jinan University, Guangzhou, PR China.,State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, PR China
| | - Shuangping Liu
- Chronic Disease Research Center, Medical College, Dalian University, Dalian, PR China.,Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Dalian University, Dalian, PR China
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Wanek J, Gaisberger M, Beyreis M, Mayr C, Helm K, Primavesi F, Jäger T, Di Fazio P, Jakab M, Wagner A, Neureiter D, Kiesslich T. Pharmacological Inhibition of Class IIA HDACs by LMK-235 in Pancreatic Neuroendocrine Tumor Cells. Int J Mol Sci 2018; 19:ijms19103128. [PMID: 30321986 PMCID: PMC6213165 DOI: 10.3390/ijms19103128] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 09/18/2018] [Accepted: 09/29/2018] [Indexed: 02/07/2023] Open
Abstract
Histone deacetylases (HDACs) play a key role in epigenetic mechanisms in health and disease and their dysfunction is implied in several cancer entities. Analysis of expression patterns in pancreatic neuroendocrine tumors (pNETs) indicated HDAC5 to be a potential target for future therapies. As a first step towards a possible treatment, the aim of this study was to evaluate the in vitro cellular and molecular effects of HDAC5 inhibition in pNET cells. Two pNET cell lines, BON-1 and QGP-1, were incubated with different concentrations of the selective class IIA HDAC inhibitor, LMK-235. Effects on cell viability were determined using the resazurin-assay, the caspase-assay, and Annexin-V staining. Western Blot and immunofluorescence microscopy were performed to assess the effects on HDAC5 functionality. LMK-235 lowered overall cell viability by inducing apoptosis in a dose- and time-dependent manner. Furthermore, acetylation of histone-H3 increased with higher LMK-235 concentrations, indicating functional inhibition of HDAC4/5. Immunocytochemical analysis showed that proliferative activity (phosphohistone H3 and Ki-67) decreased at highest concentrations of LMK-235 while chromogranin and somatostatin receptor 2 (SSTR2) expression increased in a dose-dependent manner. HDAC5 expression was found to be largely unaffected by LMK-235. These findings indicate LMK-235 to be a potential therapeutic approach for the development of an effective and selective pNET treatment.
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Affiliation(s)
- Julia Wanek
- Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Biomedical Sciences, Salzburg University of Applied Sciences, 5412 Puch/Salzburg, Austria.
- Department of Biosciences, Research Division of Regeneration, Stem Cell Biology and Gerontology, University of Salzburg, 5020 Salzburg, Austria.
| | - Martin Gaisberger
- Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
- Department for Radon Therapy Research, Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
- Gastein Research Institute, Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
| | - Marlena Beyreis
- Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
| | - Christian Mayr
- Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
| | - Katharina Helm
- Institute of Pathology, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Cancer Cluster Salzburg, 5020 Salzburg, Austria.
| | - Florian Primavesi
- Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria.
- Department of Surgery, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
| | - Tarkan Jäger
- Department of Surgery, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
| | - Pietro Di Fazio
- Department of Visceral Thoracic and Vascular Surgery, Philipps University Marburg, 35033 Marburg, Germany.
| | - Martin Jakab
- Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
| | - Andrej Wagner
- Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
| | - Daniel Neureiter
- Institute of Pathology, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Cancer Cluster Salzburg, 5020 Salzburg, Austria.
| | - Tobias Kiesslich
- Department of Internal Medicine I, Paracelsus Medical University/Salzburger Landeskliniken (SALK), 5020 Salzburg, Austria.
- Institute of Physiology and Pathophysiology, Paracelsus Medical University, 5020 Salzburg, Austria.
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Jang S, Jin H, Roy M, Ma AL, Gong S, Jaskula‐Sztul R, Chen H. Antineoplastic effects of histone deacetylase inhibitors in neuroendocrine cancer cells are mediated through transcriptional regulation of Notch1 by activator protein 1. Cancer Med 2017; 6:2142-2152. [PMID: 28776955 PMCID: PMC5603840 DOI: 10.1002/cam4.1151] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/23/2017] [Accepted: 07/03/2017] [Indexed: 01/19/2023] Open
Abstract
Notch signaling is minimally active in neuroendocrine (NE) cancer cells. While histone deacetylase inhibitors (HDACi) suppress NE cancer growth by inducing Notch, the molecular mechanism underlying this interplay has not yet been defined. NE cancer cell lines BON, H727, and MZ-CRC-1 were treated with known HDACi Thailadepsin-A (TDP-A) and valproic acid (VPA), and Notch1 mRNA expression was measured with RT-PCR. Truncated genomic fragments of the Notch1 promotor region fused with luciferase reporter were used to identify the potential transcription factor (TF) binding site. The key regulatory TF was identified with the electrophoretic mobility shift assay (EMSA). The effect of HDACi on Notch1 level was determined before and after silencing the TF. TDP-A and VPA induced Notch1 mRNA in a dose-dependent manner. A functional DNA motif at -80 to -52 from the Notch1 start codon responsible for the HDACi-dependent Notch1 induction was identified. Mutation of this core sequence failed to induce luciferase activity despite HDACi treatment. EMSA showed the greatest gel shift with AP-1 in nuclear extracts. Knockdown of AP-1 significantly attenuated the effect of HDACi on Notch1 induction. Interestingly, AP-1 transfection did not alter Notch1 level, suggesting that AP-1 is necessary but insufficient for HDACi activation of Notch1. Therefore, AP-1 is the TF that binds to a specific transcription-binding site within the Notch1 promotor region to trigger Notch1 transcription. Elucidating the HDACi activation mechanism may lead to the development of novel therapeutic options against NE cancers and facilitate the identification of clinical responders and prevent adverse effects.
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Affiliation(s)
- Samuel Jang
- Howard Hughes Medical InstituteBirminghamAlabama35233
- Department of SurgeryUniversity of Alabama at BirminghamBirminghamAlabama35233
| | - Haining Jin
- Department of SurgeryUniversity of Alabama at BirminghamBirminghamAlabama35233
| | - Madhuchhanda Roy
- Department of SurgeryUniversity of Alabama at BirminghamBirminghamAlabama35233
| | - Alice L. Ma
- Department of SurgeryUniversity of Alabama at BirminghamBirminghamAlabama35233
| | - Shaoqin Gong
- Department of Biomedical EngineeringUniversity of Wisconsin‐MadisonMadisonWI53715
| | | | - Herbert Chen
- Department of SurgeryUniversity of Alabama at BirminghamBirminghamAlabama35233
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