1
|
Rathod M, Kelkar M, Valvi S, Salve G, De A. FOXA1 Regulation Turns Benzamide HDACi Treatment Effect-Specific in BC, Promoting NIS Gene-Mediated Targeted Radioiodine Therapy. MOLECULAR THERAPY-ONCOLYTICS 2020; 19:93-104. [PMID: 33102692 PMCID: PMC7554325 DOI: 10.1016/j.omto.2020.08.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/26/2020] [Indexed: 11/03/2022]
Abstract
Human sodium iodide symporter (NIS) gene mediated radio-ablation is a successful procedure in thyroid cancer clinics. In recent years, natural expression of NIS is reported in breast cancer (BC) cases but is yet to make its mark as a therapeutic procedure in BC clinics. A pre-exposure to histone deacetylase (HDAC) inhibitors to amplify endogenous NIS expression was attempted, but achieving cancer tissue-specific enhancement of NIS in patients is an important challenge to win. Here, for the first time, we show that a benzamide class of HDACi (bHDACi) can significantly induce NIS gene expression and function (p < 0.05) in BC cells with minimal off-target effects. Transcription factor (TF) profiler and promoter binding array reveals 22 TFs differentially activated by CI-994, of which FOXA1 is identified as a unique and positive regulator of NIS. Clonogenic assay shows reduced survival with bHDACi + 131I combination treatment. Further, AR-42 and MS-275 treatment shows enhanced NIS expression in an orthotopic breast tumor model. Combining bHDACi with 1 mCi 131I shows 40% drop in signal (p < 0.05), indicating enhanced radio-ablation effect. Cerenkov imaging revealed higher accumulation of 131I in MS-275-treated tumors. Thus, bHDACi-mediated selective enhancement ensuring minimal off-target effect is a step further toward using NIS as a therapeutic target for BC.
Collapse
Affiliation(s)
- Maitreyi Rathod
- Molecular Functional Imaging Laboratory, ACTREC, Tata Memorial Centre, Navi Mumbai 410210, India.,Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Madhura Kelkar
- Molecular Functional Imaging Laboratory, ACTREC, Tata Memorial Centre, Navi Mumbai 410210, India.,Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Snehal Valvi
- Molecular Functional Imaging Laboratory, ACTREC, Tata Memorial Centre, Navi Mumbai 410210, India
| | - Girish Salve
- Molecular Functional Imaging Laboratory, ACTREC, Tata Memorial Centre, Navi Mumbai 410210, India
| | - Abhijit De
- Molecular Functional Imaging Laboratory, ACTREC, Tata Memorial Centre, Navi Mumbai 410210, India.,Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| |
Collapse
|
2
|
Small molecule HDAC inhibitors: Promising agents for breast cancer treatment. Bioorg Chem 2019; 91:103184. [PMID: 31408831 DOI: 10.1016/j.bioorg.2019.103184] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/11/2019] [Accepted: 08/04/2019] [Indexed: 12/15/2022]
Abstract
Breast cancer, a heterogeneous disease, is the most frequently diagnosed cancer and the second leading cause of cancer-related death among women worldwide. Recently, epigenetic abnormalities have emerged as an important hallmark of cancer development and progression. Given that histone deacetylases (HDACs) are crucial to chromatin remodeling and epigenetics, their inhibitors have become promising potential anticancer drugs for research. Here we reviewed the mechanism and classification of histone deacetylases (HDACs), association between HDACs and breast cancer, classification and structure-activity relationship (SAR) of HDACIs, pharmacokinetic and toxicological properties of the HDACIs, and registered clinical studies for breast cancer treatment. In conclusion, HDACIs have shown desirable effects on breast cancer, especially when they are used in combination with other anticancer agents. In the coming future, more multicenter and randomized Phase III studies are expected to be conducted pushing promising new therapies closer to the market. In addition, the design and synthesis of novel HDACIs are also needed.
Collapse
|
3
|
MAPK Inhibitors Enhance HDAC Inhibitor-Induced Redifferentiation in Papillary Thyroid Cancer Cells Harboring BRAF V600E: An In Vitro Study. MOLECULAR THERAPY-ONCOLYTICS 2019; 12:235-245. [PMID: 30847387 PMCID: PMC6389779 DOI: 10.1016/j.omto.2019.01.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/28/2019] [Indexed: 12/18/2022]
Abstract
Clinical efficacy of redifferentiation therapy with histone deacetylase inhibitor (HDACi) for lethal radioiodine-refractory papillary thyroid cancer (RR-PTC) is urgently needed to be improved. Given that the impairment of histone acetylation is a mechanism in BRAFV600E-mitogen-activated protein kinase (MAPK)-induced aberrant silencing of thyroid iodine-metabolizing genes, dual inhibition of HDAC and MAPK may produce a more favorable effect. In this study, we treated BRAFV600E-mutant (BCPAP and K1) and BRAF-wild-type (BHP 2-7) cells with HDACi (panobinostat) and MAPK inhibitor (dabrafenib or selumetinib), alone or in combination, and we tested the expression of iodine- and glucose-metabolizing genes, radioiodine uptake and efflux, and toxicity. We found that panobinostat alone increased iodine-metabolizing gene expression, promoted radioiodine uptake and toxicity, and suppressed GLUT1 expression in all the cells. However, MAPKi (dabrafenib or selumetinib) induced these effects only in BRAFV600E-mutant cells. Combined treatment with panobinostat and MAPKi (dabrafenib or selumetinib) displayed a more robust BRAFV600E-dependent redifferentiation effect than panobinostat alone via further improving the acetylation level of histone at the sodium-iodide symporter (NIS) promoter. In conclusion, MAPK inhibitors enhance HDACi-induced redifferentiation in PTC cells harboring BRAFV600E, warranting animal and clinical trials.
Collapse
|
4
|
Dias JN, Aguiar SI, Pereira DM, André AS, Gano L, Correia JD, Carrapiço B, Rütgen B, Malhó R, Peleteiro C, Goncalves J, Rodrigues CM, Gil S, Tavares L, Aires-da-Silva F. The histone deacetylase inhibitor panobinostat is a potent antitumor agent in canine diffuse large B-cell lymphoma. Oncotarget 2018; 9:28586-28598. [PMID: 29983882 PMCID: PMC6033347 DOI: 10.18632/oncotarget.25580] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 05/19/2018] [Indexed: 12/18/2022] Open
Abstract
Non-Hodgkin lymphoma (NHL) is one of the most common causes of cancer-related death in the United States and Europe. Although the outcome of NHL patients has improved over the last years with current therapies, the rate of mortality is still high. A plethora of new drugs is entering clinical development for NHL treatment; however, the approval of new treatments remains low due in part to the paucity of clinically relevant models for validation. Canine lymphoma shares remarkable similarities with its human counterpart, making the dog an excellent animal model to explore novel therapeutic molecules and approaches. Histone deacetylase inhibitors (HDACis) have emerged as a powerful new class of anti-cancer drugs for human therapy. To investigate HDACi antitumor properties on canine diffuse large B-cell lymphoma, a panel of seven HDACi compounds (CI-994, panobinostat, SBHA, SAHA, scriptaid, trichostatin A and tubacin) was screened on CLBL-1 canine B-cell lymphoma cell line. Our results demonstrated that all HDACis tested exhibited dose-dependent inhibitory effects on proliferation of CLBL-1 cells, while promoting increased H3 histone acetylation. Amongst all HDACis studied, panobinostat proved to be the most promising compound and was selected for further in vitro and in vivo evaluation. Panobinostat cytotoxicity was linked to H3 histone and α-tubulin acetylation, and to apoptosis induction. Importantly, panobinostat efficiently inhibited CLBL-1 xenograft tumor growth, and strongly induced acetylation of H3 histone and apoptosis in vivo. In conclusion, these results provide new data validating HDACis and, especially, panobinostat as a novel anti-cancer therapy for veterinary applications, while contributing to comparative oncology.
Collapse
Affiliation(s)
- Joana N.R. Dias
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Sandra I. Aguiar
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Diane M. Pereira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Ana S. André
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Lurdes Gano
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional, Bobadela LRS, Portugal
| | - João D.G. Correia
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional, Bobadela LRS, Portugal
| | - Belmira Carrapiço
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Barbara Rütgen
- Department of Pathobiology, Clinical Pathology Unit, University of Veterinary Medicine, Vienna, Austria
| | - Rui Malhó
- Biosystems and Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Conceição Peleteiro
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - João Goncalves
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Cecília M.P. Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Solange Gil
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Luís Tavares
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Frederico Aires-da-Silva
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| |
Collapse
|
5
|
Wächter S, Wunderlich A, Roth S, Mintziras I, Maurer E, Hoffmann S, Verburg FA, Fellinger SA, Holzer K, Bartsch DK, Di Fazio P. Individualised Multimodal Treatment Strategies for Anaplastic and Poorly Differentiated Thyroid Cancer. J Clin Med 2018; 7:E115. [PMID: 29762469 PMCID: PMC5977154 DOI: 10.3390/jcm7050115] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/08/2018] [Accepted: 05/09/2018] [Indexed: 02/07/2023] Open
Abstract
The prognosis of anaplastic (ATC) and poorly differentiated thyroid cancer (PDTC) is poor, due to their radioiodine refractoriness (RAI-R), high metastatic potential and current lack of effective treatment strategies. We aimed to examine the efficacy of the tyrosine kinase inhibitors (TKIs) sorafenib and selumetinib and the histone deacetylase inhibitor (HDACI) panobinostat in patient-derived tumor tissue (PDTT) of ATCs/PDTCs, the expression of sodium iodide symporter (NIS) and radioiodine up-take (RAI-U). High Mobility Group AT-Hook 2 (HMGA2) and associated miRNAs expression was correlated with the clinical course of the patients. Inhibitory effects of panobinostat, sorafenib and selumetinib were measured by real time cell analyser xCELLigence in five PDTTs and human foreskin fibroblasts (HF) used as control. Expression of NIS, HMGA2 and associated miRNAs hsa-let-7f-5p, hsa-let-7b-5p, hsa-miR-146b-5p and hsa-miR-146b-3p was performed by RT-qPCR and Western blot. RAI-U was performed by Gamma Counter with I-131. Panobinostat showed the strongest cytotoxic effect (10 nM) in all PDTTs and HF and caused a significant over-expression of NIS transcript. TKIs were able to up-regulate NIS transcript in patient 5 and in HF. RAI-U was up-regulated after 24 h of treatment with TKIs and panobinostat in all PDTT and HF, except in patient 5. Selumetinib caused a significant suppression of HMGA2 in PDTT 1, 2, 4, 5 and HF; whereas sorafenib caused no change of HMGA2 expression. Panobinostat suppressed significantly HMGA2 in PDTT 2, 4 and HF. The expression of miRNAs hsa-let-7f-5p, has-let-7b-5p hsa-miR-146b-5p and hsa-miR-146b-3p was modulated heterogeneously. NIS protein level was over-expressed in three PDTTs (patients 1, 3 and 4) after 24 h of treatment with selumetinib, sorafenib and in particular with panobinostat. HF showed a stable NIS protein level after treatment. Panobinostat showed the strongest cytotoxicity in all treated PDTTs at the lowest dosage in comparison with TKI. All three compounds were able to modulate differently NIS, HMGA2 and related miRNAs. These factors represent valuable markers in PDTT for new treatment strategies for patients suffering from ATC/PDTC. Thus, the establishment of PDTT could be a useful tool to test the efficacy of compounds and to develop new and individualised multimodal treatment options for PDTCs and ATCs.
Collapse
Affiliation(s)
- Sabine Wächter
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Annette Wunderlich
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Silvia Roth
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Ioannis Mintziras
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Elisabeth Maurer
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Sebastian Hoffmann
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Frederik A Verburg
- Department of Nuclear Medicine, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Sebastian A Fellinger
- Department of Nuclear Medicine, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Katharina Holzer
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Detlef K Bartsch
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| | - Pietro Di Fazio
- Department of Visceral, Thoracic and Vascular Surgery, Philipps University Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
| |
Collapse
|
6
|
Antitumoral activity of 1,2-diaminocyclohexane derivatives in breast, colon and skin human cancer cells. Future Med Chem 2017; 9:293-302. [DOI: 10.4155/fmc-2016-0212] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Cancer is among the leading causes of death worldwide. Medical interest has focused on macrocyclic polyamines because of their properties as antitumor agents. Results/Methodology: We have designed and synthesized a series of 1,2-diaminocyclohexane derivatives with notable in vitro antiproliferative activities against the MCF-7, HCT-116 and A375 cancer cell lines. Cell cycle and apoptosis analyses were also carried out. Our results show that all the compounds are potent cytotoxic agents, especially against the A375 cell line. Conclusion: The selective activity of the macrocyclic derivative against A375, via apoptosis, supposes a great advantage for future therapeutic use. This exemplifies the potential of 1,2-diaminocyclohexane derivatives to qualify as lead structures for future anticancer drug development due to their easy syntheses and noteworthy bioactivity.
Collapse
|
7
|
Wasim L, Chopra M. Panobinostat induces apoptosis via production of reactive oxygen species and synergizes with topoisomerase inhibitors in cervical cancer cells. Biomed Pharmacother 2016; 84:1393-1405. [PMID: 27802904 DOI: 10.1016/j.biopha.2016.10.057] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 10/07/2016] [Accepted: 10/17/2016] [Indexed: 01/22/2023] Open
Abstract
Cervical cancer is the fourth major cause of cancer-related deaths in women worldwide and is the most common cancer in developing countries. Therefore, a search for novel treatment modalities is warranted. The present study is designed to investigate the effect of pan histone deacetylase inhibitor, 'panobinostat', on cervical cancer cells alone and in combination with topoisomerase inhibitors. We assessed the effect of panobinostat on two cervical cancer cell lines, HeLa and SiHa, for cell viability, apoptosis, oxidative stress and mitochondrial function using various assays. The results indicate that panobinostat reduces the viability of cervical cancer cells in a dose- and time-dependent manner; it arrests HeLa cells in G0/G1 and SiHa cells in G2/M phase of the cell cycle. Panobinostat induced apoptosis through an increase in the ROS production and the disruption of mitochondrial membrane potential. Concomitantly the expression of anti-apoptotic gene Bcl-xL was reduced, while levels of CDK inhibitor p21 and caspase-9 were increased. Panobinostat increased the acetylation of histone H3 indicating HDAC inhibition. In addition, panobinostat also showed synergistic effect with topoisomerase inhibitors mediated by increased activation of caspase-3/7 activity compared to that in cells treated with panobinostat alone. These results suggest a combination therapy using inhibitors of histone deacetylase and topoisomerase together could hold the promise for an effective targeted therapeutic strategy.
Collapse
Affiliation(s)
- Lubna Wasim
- Laboratory of Molecular Modeling and Anticancer Drug Development, Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India.
| | - Madhu Chopra
- Laboratory of Molecular Modeling and Anticancer Drug Development, Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India.
| |
Collapse
|
8
|
Marchwicka A, Cunningham A, Marcinkowska E, Brown G. Therapeutic use of selective synthetic ligands for retinoic acid receptors: a patent review. Expert Opin Ther Pat 2016; 26:957-71. [PMID: 27336223 DOI: 10.1080/13543776.2016.1205586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Differentiation therapy using all-trans retinoic acid (ATRA) revolutionised the treatment of acute promyelocytic leukaemia to such an extent that it is now one of the most curable types of leukaemia, with ATRA and anthracycline-based chemotherapy providing cure rates above 80%. Isotretinoin is used to treat chronic acne. Here, we examine the information described in recent patents and the extent to which new findings are influencing extending retinoid-based differentiation therapy to other cancers, as well as the development of new therapies for other disorders. AREAS COVERED A search has been performed on the literature and worldwide patents filed during 2014 to the present time, focusing on synthetic agonists and antagonists of retinoic acid receptors and novel compositions for the delivery of these agents. EXPERT OPINION New potential therapeutic applications have been described, including lung, breast and head and neck cancers, T cell lymphoma and neurodegenerative, metabolic, ophthalmic, muscle, and inflammatory disorders. Recent patents have described the means to maximise retinoid activity. Two decades of efforts to extend retinoid-based therapies have been disappointing and new synthetic retinoids, target diseases and modes of delivery may well resolve this long standing issue.
Collapse
Affiliation(s)
- Aleksandra Marchwicka
- a Laboratory of Protein Biochemistry, Faculty of Biotechnology , University of Wroclaw , Wroclaw , Poland
| | - Alan Cunningham
- b Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences , University of Birmingham , Birmingham , UK
| | - Ewa Marcinkowska
- a Laboratory of Protein Biochemistry, Faculty of Biotechnology , University of Wroclaw , Wroclaw , Poland
| | - Geoffrey Brown
- c Institute of Clinical Sciences, College of Medical and Dental Sciences , University of Birmingham , Birmingham , UK
| |
Collapse
|
9
|
Enhancement of human sodium iodide symporter gene therapy for breast cancer by HDAC inhibitor mediated transcriptional modulation. Sci Rep 2016; 6:19341. [PMID: 26777440 PMCID: PMC4726020 DOI: 10.1038/srep19341] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 12/02/2015] [Indexed: 12/24/2022] Open
Abstract
The aberrant expression of human sodium iodide symporter (NIS) in breast cancer (BC) has raised the possibility of using targeted radioiodide therapy. Here we investigate modulation of endogenous, functional NIS expression by histone deacetylase inhibitors (HDACi) in vitro and in vivo. Luciferase reporter based initial screening of six different HDACi shows 2–10 fold enhancement of NIS promoter activity in majority of the cell types tested. As a result of drug treatment, endogenous NIS transcript and protein shows profound induction in BC cells. To get an insight on the mechanism of such transcriptional activation, role of Stat4, CREB and other transcription factors are revealed by transcription factor profiling array. Further, NIS-mediated intracellular iodide uptake also enhances substantially (p < 0.05) signifying functional relevance of the transcriptional modulation strategy. Gamma camera imaging confirms 30% higher uptake in VPA or NaB treated BC tumor xenograft. Corroborating with such functional impact of NIS, significant reduction in cell survival (p < 0.005) is observed in VPA, NaB or CI994 drug and 131I combination treatment in vivo indicating effective radioablation. Thus, for the first time this study reveals the mechanistic basis and demonstrates functional relevance of HDACi pre-treatment strategy in elevating NIS gene therapy approach for BC management in clinic.
Collapse
|
10
|
Meng Q, Liu Z, Li F, Ma J, Wang H, Huan Y, Li Z. An HDAC-Targeted Imaging Probe LBH589–Cy5.5 for Tumor Detection and Therapy Evaluation. Mol Pharm 2015; 12:2469-76. [DOI: 10.1021/acs.molpharmaceut.5b00167] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Qingqing Meng
- Department
of Translational Imaging, Houston Methodist Research Institute, Houston, Texas 77030, United States
| | - Zhiyi Liu
- Department
of Translational Imaging, Houston Methodist Research Institute, Houston, Texas 77030, United States
| | - Feng Li
- Department
of Translational Imaging, Houston Methodist Research Institute, Houston, Texas 77030, United States
| | | | | | | | - Zheng Li
- Department
of Translational Imaging, Houston Methodist Research Institute, Houston, Texas 77030, United States
| |
Collapse
|
11
|
Tomao F, Papa A, Zaccarelli E, Rossi L, Caruso D, Minozzi M, Vici P, Frati L, Tomao S. Triple-negative breast cancer: new perspectives for targeted therapies. Onco Targets Ther 2015; 8:177-93. [PMID: 25653541 PMCID: PMC4303459 DOI: 10.2147/ott.s67673] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Breast cancer is a heterogeneous disease, encompassing a large number of entities showing different morphological features and having clinical behaviors. It has became apparent that this diversity may be justified by distinct patterns of genetic, epigenetic, and transcriptomic aberrations. The identification of gene-expression microarray-based characteristics has led to the identification of at least five breast cancer subgroups: luminal A, luminal B, normal breast-like, human epidermal growth factor receptor 2, and basal-like. Triple-negative breast cancer is a complex disease diagnosed by immunohistochemistry, and it is characterized by malignant cells not expressing estrogen receptors or progesterone receptors at all, and human epidermal growth factor receptor 2. Along with this knowledge, recent data show that triple-negative breast cancer has specific molecular features that could be possible targets for new biological targeted drugs. The aim of this article is to explore the use of new drugs in this particular setting, which is still associated with poor prognosis and high risk of distant recurrence and death.
Collapse
Affiliation(s)
- Federica Tomao
- Department of Gynecology and Obstetrics, “Sapienza” University of Rome, Policlinico “Umberto I”, Rome, Italy
| | - Anselmo Papa
- Department of Medico-Surgical Sciences and Biotechnologies, “Sapienza” University of Rome, Oncology Unit, Istituto Chirurgico Ortopedico Traumatologico, Latina, Italy
| | - Eleonora Zaccarelli
- Department of Medico-Surgical Sciences and Biotechnologies, “Sapienza” University of Rome, Oncology Unit, Istituto Chirurgico Ortopedico Traumatologico, Latina, Italy
| | - Luigi Rossi
- Department of Medico-Surgical Sciences and Biotechnologies, “Sapienza” University of Rome, Oncology Unit, Istituto Chirurgico Ortopedico Traumatologico, Latina, Italy
| | - Davide Caruso
- Department of Medico-Surgical Sciences and Biotechnologies, “Sapienza” University of Rome, Oncology Unit, Istituto Chirurgico Ortopedico Traumatologico, Latina, Italy
| | - Marina Minozzi
- Department of Medico-Surgical Sciences and Biotechnologies, “Sapienza” University of Rome, Oncology Unit, Istituto Chirurgico Ortopedico Traumatologico, Latina, Italy
| | - Patrizia Vici
- Division of Medical Oncology B, Regina Elena National Cancer Institute, Rome, Italy
| | - Luigi Frati
- Department of Molecular Medicine, “Sapienza” University of Rome, Policlinico “Umberto I”, Rome, Italy
| | - Silverio Tomao
- Department of Medico-Surgical Sciences and Biotechnologies, “Sapienza” University of Rome, Oncology Unit, Istituto Chirurgico Ortopedico Traumatologico, Latina, Italy
| |
Collapse
|
12
|
Baldan F, Lavarone E, Di Loreto C, Filetti S, Russo D, Damante G, Puppin C. Histone post-translational modifications induced by histone deacetylase inhibition in transcriptional control units of NIS gene. Mol Biol Rep 2014; 41:5257-65. [PMID: 24844212 DOI: 10.1007/s11033-014-3397-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 05/06/2014] [Indexed: 10/25/2022]
Abstract
Histone post-translational modifications (HPTMs) play a major role in control of gene transcription. Among them, histone acetylation and methylation have been extensively investigated. Histone acetylation at different residues is generally associated to active gene transcription. In contrast, histone methylation can be associated either to transcriptional activation or repression, depending primarily on the histone residue that is subjected to the modification. Herein, effects of the histone deacetylase inhibitor SAHA on the sodium-iodide symporter (NIS) gene expression were investigated in breast cancer cells (MDA157 and MDA468). SAHA treatment induces high increase of NIS mRNA levels in MDA468 cells (300-fold), but moderate increase in MDA157 cells (fivefold). Histone H3 HPTMs (acetylation and methylations) on transcriptional units of NIS gene were investigated in these cell lines upon SAHA treatment. Our data indicate that HPTMs, particularly the H3 lysine 27 trimethylation, may operate in contrast to current models that relate epigenetic modifications with transcriptional activity.
Collapse
Affiliation(s)
- Federica Baldan
- Department of Medical and Biological Sciences, University of Udine, Piazzale Kolbe 4, 33100, Udine, Italy
| | | | | | | | | | | | | |
Collapse
|
13
|
Micali S, Bulotta S, Puppin C, Territo A, Navarra M, Bianchi G, Damante G, Filetti S, Russo D. Sodium iodide symporter (NIS) in extrathyroidal malignancies: focus on breast and urological cancer. BMC Cancer 2014; 14:303. [PMID: 24884806 PMCID: PMC4019362 DOI: 10.1186/1471-2407-14-303] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 04/17/2014] [Indexed: 12/15/2022] Open
Abstract
Background Expression and function of sodium iodide symporter (NIS) is requisite for efficient iodide transport in thyrocytes, and its presence in cancer cells allows the use of radioiodine as a diagnostic and therapeutic tool in thyroid neoplasia. Discovery of NIS expression in extrathyroidal tissues, including transformed cells, has opened a novel field of research regarding NIS-expressing extrathyroidal neoplasia. Indeed, expression of NIS may be used as a biomarker for diagnostic, prognostic, and therapeutic purposes. Moreover, stimulation of endogenous NIS expression may permit the radioiodine treatment of extrathyroidal lesions by concentrating this radioisotope. Results This review describes recent findings in NIS research in extrathyroidal malignancies, focusing on breast and urological cancer, emphasizing the most relevant developments that may have clinical impact. Conclusions Given the recent progress in the study of NIS regulation as molecular basis for new therapeutic approaches in extrathyroidal cancers, particular attention is given to studies regarding the relationship between NIS and clinical-pathological aspects of the tumors and the regulation of NIS expression in the experimental models.
Collapse
Affiliation(s)
| | | | | | - Angelo Territo
- Department of Urology, University of Modena and Reggio Emilia, Via Largo del Pozzo, 71, Modena 41100, Italy.
| | | | | | | | | | | |
Collapse
|
14
|
Fortunati N, Marano F, Bandino A, Frairia R, Catalano MG, Boccuzzi G. The pan-histone deacetylase inhibitor LBH589 (panobinostat) alters the invasive breast cancer cell phenotype. Int J Oncol 2013; 44:700-8. [PMID: 24366407 DOI: 10.3892/ijo.2013.2218] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 10/22/2013] [Indexed: 11/06/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is a very aggressive type of tumour and its aggressiveness is linked to E-cadherin downregulation. In estrogen-sensitive breast cancer, high levels of E-cadherin fit with high levels of ERα and MTA3 (a component of the transcription Mi-2/NuRD complex with intrinsic DAC activity). In TNBC the E-cadherin downregulation could be due to epigenetic silencing of the CDH1 gene as well as to the lack of a fully functioning ERα-activated pathway. We report that the pan-histone deacetylase inhibitor LBH589, a potent anti-proliferative agent, induced E-cadherin expression on cell membranes of MDA-MB-231 cells (TNBC), determining a reduction of cell invasion and migration. Even though E-cadherin expression in breast cancer is also regulated by estradiol and the ERα/MTA3/Snail/Slug pathway, LBH589 is able to increase E-cadherin without affecting the estrogen pathway. In fact, no expression of ERα, PR and FoxA1 was observed in MDA-MB-231 cells before and after LBH589 treatment; furthermore, the drug caused an increase in Snail and Slug expression with a concomitant reduction of MTA3 levels. Taking into consideration its anti-proliferative and anti-invasive properties, we suggest the use of LBH589 in aggressive breast cancer refractory to hormonal therapy.
Collapse
Affiliation(s)
- Nicoletta Fortunati
- Oncological Endocrinology, AO Città della Salute e della Scienza di Torino, University of Turin, I-10126 Torino, Italy
| | - Francesca Marano
- Department of Medical Sciences, University of Turin, I-10126 Torino, Italy
| | - Andrea Bandino
- Department of Oncology, Biochemistry Section, University of Turin, I-10100 Torino, Italy
| | - Roberto Frairia
- Department of Medical Sciences, University of Turin, I-10126 Torino, Italy
| | | | - Giuseppe Boccuzzi
- Department of Medical Sciences, University of Turin, I-10126 Torino, Italy
| |
Collapse
|
15
|
Enhancement of natural killer cell cytotoxicity by sodium/iodide symporter gene-mediated radioiodine pretreatment in breast cancer cells. PLoS One 2013; 8:e70194. [PMID: 23940545 PMCID: PMC3734030 DOI: 10.1371/journal.pone.0070194] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 06/16/2013] [Indexed: 12/31/2022] Open
Abstract
A phase II study of NK cell therapy in treatment of patients with recurrent breast cancer has recently been reported. However, because of the complexities of tumor microenvironments, effective therapeutic effects have not been achieved in NK cell therapy. Radioiodine (I-131) therapy inhibits cancer growth by inducing the apoptosis and necrosis of cancer cells. Furthermore, it can modify cancer cell phenotypes and enhance the effect of immunotherapy against cancer cells. The present study showed that I-131 therapy can modulate microenvironment of breast cancer and improve the therapeutic effect by enhancing NK cell cytotoxicity to the tumor cells. The susceptibility of breast cancer cells to NK cell was increased by precedent I-131 treatment in vitro. Tumor burden in mice treated with I-131 plus NK cell was significantly lower than that in mice treated with NK cell or I-131 alone. The up-regulation of Fas, DR5 and MIC A/B on irradiated tumor cells could be the explanation for the enhancement of NK cell cytotoxicity to tumor cells. It can be applied to breast cancer patients with iodine avid metastatic lesions that are non-responsive to conventional treatments.
Collapse
|
16
|
Pugliese M, Fortunati N, Germano A, Asioli S, Marano F, Palestini N, Frairia R, Boccuzzi G, Catalano MG. Histone deacetylase inhibition affects sodium iodide symporter expression and induces 131I cytotoxicity in anaplastic thyroid cancer cells. Thyroid 2013; 23:838-46. [PMID: 23531031 DOI: 10.1089/thy.2012.0359] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Anaplastic thyroid cancers (ATCs) represent only 1%-2% of all thyroid tumors, but they account for up to 50% of the mortality. Treatment of differentiated thyroid carcinomas is well standardized and the use of radioiodine represents an essential step; in contrast, there is no standardized therapeutic approach for anaplastic tumors and their prognosis is poor. The resistance of ATC to radioiodine treatment is principally due to the absence of expression of the sodium iodide symporter (NIS), mainly due to epigenetic silencing. The acetylation status of histones is involved in the epigenetic control of gene expression and is usually disrupted in advanced thyroid cancer. Histone deacetylase inhibitors have been demonstrated as potent anticancer drugs with several different effects on cell viability and differentiation. METHODS Stabilized ATC cell lines (BHT-101 and CAL-62) and primary cultures from patients who underwent thyroidectomy for ATC were treated with the histone deacetylase inhibitor LBH589. After treatment, we evaluated the expression and function of NIS. Gene expression was evaluated by real-time polymerase chain reaction (RT-PCR), NIS promoter activity was determined with a luciferase reporter assay, and protein expression was assessed through immunofluorescence. We tested the protein function by (125)I uptake and efflux experiments; finally the cytotoxic effect of (131)I was determined with a clonogenic assay. RESULTS Our results demonstrate that treatment with LBH589 leads to NIS RNA expression as shown by RT-PCR and luciferase assay, and to protein expression as determined by immunofluorescence in vitro and by immunohistochemistry in xenograft tumors. Moreover, (125)I uptake and efflux experiments show the correct protein function and iodine retention, which translate into cytotoxicity effects, as demonstrated by a clonogenic assay with (131)I. CONCLUSIONS This study supplies a new potential strategy for the treatment of ATC by modifying gene expression with the aim of inducing responsiveness towards radioiodine therapy.
Collapse
|
17
|
Wang YQ, Miao ZH. Marine-derived angiogenesis inhibitors for cancer therapy. Mar Drugs 2013; 11:903-33. [PMID: 23502698 PMCID: PMC3705379 DOI: 10.3390/md11030903] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 02/25/2013] [Accepted: 03/01/2013] [Indexed: 12/18/2022] Open
Abstract
Angiogenesis inhibitors have been successfully used for cancer therapy in the clinic. Many marine-derived natural products and their analogues have been reported to show antiangiogenic activities. Compared with the drugs in the clinic, these agents display interesting characteristics, including diverse sources, unique chemical structures, special modes of action, and distinct activity and toxicity profiles. This review will first provide an overview of the current marine-derived angiogenesis inhibitors based on their primary targets and/or mechanisms of action. Then, the marine-derived antiangiogenic protein kinase inhibitors will be focused on. And finally, the clinical trials of the marine-derived antiangiogenic agents will be discussed, with special emphasis on their application potentials, problems and possible coping strategies in their future development as anticancer drugs.
Collapse
Affiliation(s)
- Ying-Qing Wang
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China.
| | | |
Collapse
|
18
|
Bellucci L, Dalvai M, Kocanova S, Moutahir F, Bystricky K. Activation of p21 by HDAC inhibitors requires acetylation of H2A.Z. PLoS One 2013; 8:e54102. [PMID: 23349794 PMCID: PMC3548890 DOI: 10.1371/journal.pone.0054102] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 12/06/2012] [Indexed: 12/31/2022] Open
Abstract
Differential positioning of the histone variant H2A.Z in a p53 dependent manner was shown to regulate p21 transcription. Whether H2A.Z is involved in p21 activity in the absence of p53 is not known. The p21 gene is repressed in estrogen receptor (ER) negative cell lines that are p53−/− and hormone independent for their growth. Here we demonstrate that class I and II pan Histone deacetylase inhibitors (HDACi) induce p21 transcription and reduce cell proliferation of MDA-MB231, an ERα-negative mammary tumor cell line, in a H2A.Z dependent manner. H2A.Z is associated with the transcription start site (TSS) of the repressed p21 gene. Depleting H2A.Z did not lead to transcription of p21 but annihilated the stimulating effect of HDACi on this gene. Acetylation of H2A.Z but not of H3K9 at the p21 promoter correlated with p21 activation. We further show that HDACi treatment reduced the presence of the p400 chromatin remodeler at the p21 TSS. We propose a model in which association of p400 negatively affects p21 transcription by interfering with acetylation of H2A.Z.
Collapse
Affiliation(s)
- Luca Bellucci
- Laboratoire de Biologie Moléculaire Eucaryote, Université de Toulouse, Toulouse, France
| | | | | | | | | |
Collapse
|
19
|
Kogai T, Brent GA. The sodium iodide symporter (NIS): regulation and approaches to targeting for cancer therapeutics. Pharmacol Ther 2012; 135:355-70. [PMID: 22750642 DOI: 10.1016/j.pharmthera.2012.06.007] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Accepted: 06/19/2012] [Indexed: 01/21/2023]
Abstract
Expression of the sodium iodide symporter (NIS) is required for efficient iodide uptake in thyroid and lactating breast. Since most differentiated thyroid cancer expresses NIS, β-emitting radioactive iodide is routinely utilized to target remnant thyroid cancer and metastasis after total thyroidectomy. Stimulation of NIS expression by high levels of thyroid-stimulating hormone is necessary to achieve radioiodide uptake into thyroid cancer that is sufficient for therapy. The majority of breast cancer also expresses NIS, but at a low level insufficient for radioiodine therapy. Retinoic acid is a potent NIS inducer in some breast cancer cells. NIS is also modestly expressed in some non-thyroidal tissues, including salivary glands, lacrimal glands and stomach. Selective induction of iodide uptake is required to target tumors with radioiodide. Iodide uptake in mammalian cells is dependent on the level of NIS gene expression, but also successful translocation of NIS to the cell membrane and correct insertion. The regulatory mechanisms of NIS expression and membrane insertion are regulated by signal transduction pathways that differ by tissue. Differential regulation of NIS confers selective induction of functional NIS in thyroid cancer cells, as well as some breast cancer cells, leading to more efficient radioiodide therapy for thyroid cancer and a new strategy for breast cancer therapy. The potential for systemic radioiodide treatment of a range of other cancers, that do not express endogenous NIS, has been demonstrated in models with tumor-selective introduction of exogenous NIS.
Collapse
Affiliation(s)
- Takahiko Kogai
- Molecular Endocrinology Laboratory, VA Greater Los Angeles Healthcare System, Departments of Medicine and Physiology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90073, USA.
| | | |
Collapse
|
20
|
Tate CR, Rhodes LV, Segar HC, Driver JL, Pounder FN, Burow ME, Collins-Burow BM. Targeting triple-negative breast cancer cells with the histone deacetylase inhibitor panobinostat. Breast Cancer Res 2012; 14:R79. [PMID: 22613095 PMCID: PMC3446342 DOI: 10.1186/bcr3192] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 04/10/2012] [Accepted: 05/21/2012] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Of the more than one million global cases of breast cancer diagnosed each year, approximately fifteen percent are characterized as triple-negative, lacking the estrogen, progesterone, and Her2/neu receptors. Lack of effective therapies, younger age at onset, and early metastatic spread have contributed to the poor prognoses and outcomes associated with these malignancies. Here, we investigate the ability of the histone deacetylase inhibitor panobinostat (LBH589) to selectively target triple-negative breast cancer (TNBC) cell proliferation and survival in vitro and tumorigenesis in vivo. METHODS TNBC cell lines MDA-MB-157, MDA-MB-231, MDA-MB-468, and BT-549 were treated with nanomolar (nM) quantities of panobinostat. Relevant histone acetylation was verified by flow cytometry and immunofluorescent imaging. Assays for trypan blue viability, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) proliferation, and DNA fragmentation were used to evaluate overall cellular toxicity. Changes in cell cycle progression were assessed with propidium iodide flow cytometry. Additionally, qPCR arrays were used to probe MDA-MB-231 cells for panobinostat-induced changes in cancer biomarkers and signaling pathways. Orthotopic MDA-MB-231 and BT-549 mouse xenograft models were used to assess the effects of panobinostat on tumorigenesis. Lastly, flow cytometry, ELISA, and immunohistochemical staining were applied to detect changes in cadherin-1, E-cadherin (CDH1) protein expression and the results paired with confocal microscopy in order to examine changes in cell morphology. RESULTS Panobinostat treatment increased histone acetylation, decreased cell proliferation and survival, and blocked cell cycle progression at G2/M with a concurrent decrease in S phase in all TNBC cell lines. Treatment also resulted in apoptosis induction at 24 hours in all lines except the MDA-MB-468 cell line. MDA-MB-231 and BT-549 tumor formation was significantly inhibited by panobinostat (10 mg/kg/day) in mice. Additionally, panobinostat up-regulated CDH1 protein in vitro and in vivo and induced cell morphology changes in MDA-MB-231 cells consistent with reversal of the mesenchymal phenotype. CONCLUSIONS This study revealed that panobinostat is overtly toxic to TNBC cells in vitro and decreases tumorigenesis in vivo. Additionally, treatment up-regulated anti-proliferative, tumor suppressor, and epithelial marker genes in MDA-MB-231 cells and initiated a partial reversal of the epithelial-to-mesenchymal transition. Our results demonstrate a potential therapeutic role of panobinostat in targeting aggressive triple-negative breast cancer cell types.
Collapse
Affiliation(s)
- Chandra R Tate
- Department of Medicine, Section of Hematology and Medical Oncology, Tulane University Health Sciences Center, 1430 Tulane Ave, New Orleans, LA 70112, USA
| | | | | | | | | | | | | |
Collapse
|
21
|
The pan-deacetylase inhibitor panobinostat induces cell death and synergizes with everolimus in Hodgkin lymphoma cell lines. Blood 2012; 119:4017-25. [PMID: 22408261 DOI: 10.1182/blood-2011-01-331421] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The pan-deacetylase inhibitor panobinostat (LBH589) recently has been shown to have significant clinical activity in patients with relapsed Hodgkin lymphoma, but its mechanism of action in Hodgkin lymphoma remains unknown. In this study, we demonstrate that panobinostat has potent antiproliferative activity against Hodgkin lymphoma-derived cell lines. At the molecular level, panobinostat activated the caspase pathway, inhibited STAT5 and STAT6 phosphorylation, and down-regulated hypoxia-inducible factor 1 α and its downstream targets, glucose transporter 1 (GLUT1) and vascular endothelial growth factor. Paradoxically, panobinostat inhibited LKB1 and AMP-activated protein kinase, leading to activation of mammalian target of rapamycin (mTOR) that promotes survival. Combining panobinostat with the mTOR inhibitor everolimus (RAD001) inhibited panobinostat-induced mTOR activation and enhanced panobinostat antiproliferative effects. Collectively, our data demonstrate that panobinostat is a potent deacetylase inhibitor against Hodgkin lymphoma-derived cell lines, and provide a mechanistic rationale for combining panobinostat with mTOR inhibitors for treating Hodgkin lymphoma patients. Furthermore, the effect of panobinostat on GLUT1 expression suggests that panobinostat may modulate the results of clinical diagnostic imaging tests that depend of functional GLUT1, such as fluorodeoxyglucose positron emission tomography.
Collapse
|
22
|
Catalano MG, Pugliese M, Gargantini E, Grange C, Bussolati B, Asioli S, Bosco O, Poli R, Compagnone A, Bandino A, Mainini F, Fortunati N, Boccuzzi G. Cytotoxic activity of the histone deacetylase inhibitor panobinostat (LBH589) in anaplastic thyroid cancer in vitro and in vivo. Int J Cancer 2011; 130:694-704. [DOI: 10.1002/ijc.26057] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Accepted: 02/14/2011] [Indexed: 11/07/2022]
|