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https://www.readbyqxmd.com/read/29423093/combination-of-a-hypomethylating-agent-and-inhibitors-of-parp-and-hdac-traps-parp1-and-dnmt1-to-chromatin-acetylates-dna-repair-proteins-down-regulates-nurd-and-induces-apoptosis-in-human-leukemia-and-lymphoma-cells
#1
Benigno C Valdez, Yang Li, David Murray, Yan Liu, Yago Nieto, Richard E Champlin, Borje S Andersson
Combination of drugs that target different aspects of aberrant cellular processes is an efficacious treatment for hematological malignancies. Hypomethylating agents (HMAs) and inhibitors of poly(ADP-ribose) polymerases (PARPis) and histone deacetylases (HDACis) are clinically active anti-tumor drugs. We hypothesized that their combination would be synergistically cytotoxic to leukemia and lymphoma cells. Exposure of AML and lymphoma cell lines to the combination of the PARPi niraparib (Npb), the HMA decitabine (DAC) and the HDACi romidepsin (Rom) or panobinostat (Pano) synergistically inhibited cell proliferation by up to 70% via activation of the ATM pathway, increased production of reactive oxygen species, decreased mitochondrial membrane potential, and activated apoptosis...
January 9, 2018: Oncotarget
https://www.readbyqxmd.com/read/29397528/the-future-of-combination-therapies-for-peripheral-t-cell-lymphoma-ptcl
#2
REVIEW
Helen Ma, Ardy Davarifar, Jennifer E Amengual
PURPOSE OF REVIEW: Peripheral T cell lymphoma is a rare heterogeneous group of diseases which are characterized by poor outcomes to treatment and short overall survival. In the past decade, several new therapies targeting T cell biology have been approved in the relapsed setting. These new therapies, such as pralatrexate, romidepsin, belinostat, and brentuximab vedotin, have begun to make their way into practice. Despite these advances, outcomes have not changed dramatically. In recent years, efforts have been made to incorporate these new therapies into combination strategies to treat this challenging disease entity...
February 3, 2018: Current Hematologic Malignancy Reports
https://www.readbyqxmd.com/read/29391350/overcoming-resistance-to-dna-targeted-agents-by-epigenetic-activation-of-schlafen-11-slfn11-expression-with-class-i-histone-deacetylase-inhibitors
#3
Sai Wen Tang, Anish Thomas, Junko Murai, Jane Trepel, Susan E Bates, Vinodh N Rajapakse, Yves Pommier
PURPOSE: Schlafen 11 (SLFN11), a putative DNA/RNA helicase is a dominant genomic determinant of response to DNA damaging agents and is frequently not expressed in cancer cells. Whether histone deacetylase (HDAC) inhibitors can be used to release SLFN11 and sensitize SLFN11-inactivated cancers to DNA-targeted agents is tested here. EXPERIMENTAL DESIGN: SLFN11 expression was examined in The Cancer Genome Atlas (TCGA), in cancer cell line databases and in patients treated with romidepsin...
February 1, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29312470/combined-inhibition-of-bet-proteins-and-class-i-hdacs-synergistically-induces-apoptosis-in-urothelial-carcinoma-cell-lines
#4
Alexander S Hölscher, Wolfgang A Schulz, Maria Pinkerneil, Günter Niegisch, Michèle J Hoffmann
Background: New efficient therapies for urothelial carcinoma (UC) are urgently required. Small-molecule drugs targeting chromatin regulators are reasonable candidates because these regulators are frequently mutated or deregulated in UC. Indeed, in previous work, Romidepsin, which targets class I histone deacetylases (HDAC), efficiently killed UC cells, but did not elicit canonical apoptosis and affected benign urothelial cells indiscriminately. Combinations of HDAC inhibitors with JQ1, an inhibitor of bromodomain-containing acetylation reader proteins like BRD4, which promote especially the transcription of pro-tumorigenic genes, have shown efficacy in several tumor types...
2018: Clinical Epigenetics
https://www.readbyqxmd.com/read/29209628/inhibitors-of-histone-deacetylases-are-weak-activators-of-the-fmr1-gene-in-fragile-x-syndrome-cell-lines
#5
Alexander A Dolskiy, Vladimir O Pustylnyak, Andrey A Yarushkin, Natalya A Lemskaya, Dmitry V Yudkin
Fragile X syndrome is the most common cause of inherited intellectual disability in humans. It is a result of CGG repeat expansion in the 5' untranslated region (5' UTR) of the FMR1 gene. This gene encodes the FMRP protein that is involved in neuronal development. Repeat expansion leads to heterochromatinization of the promoter, gene silencing, and the subsequent absence of FMRP. To date, there is no specific therapy for the syndrome. All treatments in clinic practice provide symptomatic therapy. The development of drug therapy for Fragile X syndrome treatment is connected with the search for inhibitors of enzymes that are responsible for heterochromatinization...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29191068/an-exploratory-cost-effectiveness-analysis-of-systemic-treatments-for-cutaneous-t-cell-lymphoma
#6
Larisa Geskin, Daniel C Malone
PURPOSE: To conduct an exploratory cost-effectiveness analysis of systemic treatment options for more advanced cutaneous T-cell lymphoma (CTCL). METHODS: A cost-effectiveness model compared systemic bexarotene, denileukin diftitox, interferon-α, methotrexate, pralatrexate, romidepsin, vorinostat, and extracorporeal photopheresis (ECP) treatment of CTCL. Treatment effectiveness data were extracted from published studies and/or US product labeling. Overall response, the primary effectiveness measure, was defined as the proportion of patients achieving complete or partial response...
December 18, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/29141948/a-phase-1-study-of-romidepsin-and-pralatrexate-reveals-marked-activity-in-relapsed-and-refractory-t-cell-lymphoma
#7
Jennifer E Amengual, Renee Lichtenstein, Jennifer Lue, Ahmed Sawas, Changchun Deng, Emily Lichtenstein, Karen Khan, Laine Atkins, Aishling Rada, Hye A Kim, Codruta Chiuzan, Matko Kalac, Enrica Marchi, Lorenzo Falchi, Mark A Francescone, Lawrence Schwartz, Serge Cremers, Owen A O'Connor
Peripheral T-cell lymphomas (PTCL) are a group of rare malignancies characterized by chemotherapy resistance and poor prognosis. Romidepsin and pralatrexate were approved by the US Food and Drug Administration for patients with relapsed/refractory PTCL, exhibiting response rates of 25% and 29% respectively. Based on synergy in preclinical models of PTCL, we initiated a phase 1 study of pralatrexate plus romidepsin in patients with relapsed/refractory lymphoma. This was a single institution dose-escalation study of pralatrexate plus romidepsin designed to determine the dose-limiting toxicities (DLTs), maximum tolerated dose, pharmacokinetic profile, and response rates...
January 25, 2018: Blood
https://www.readbyqxmd.com/read/29135083/comparison-of-the-anticancer-properties-of-a-novel-valproic-acid-prodrug-to-leading-histone-deacetylase-inhibitors
#8
Nataly Tarasenko, Hanna Chekroun-Setti, Abraham Nudelman, Ada Rephaeli
The HDAC inhibitory activity of valproic acid (VPA) has led to on-going evaluation of it as an anticancer agent. The histone deacetylase (HDAC) inhibitor AN446, a prodrug of VPA, releases the acid upon metabolic degradation. AN446 is >60 fold more potent than VPA in killing cancer cells in vitro. Herein, we compare the activities of AN446, as an anticancer agent, to those of representative types from each of the four major classes of HDAC inhibitors (HDACIs): vorinostat, romidepsin, entinostat and VPA. AN446 exhibited the greatest selectivity and HDAC inhibitory activity against cancer cells...
November 14, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29102679/cutaneous-t-cell-lymphomas-focusing-on-novel-agents-in-relapsed-and-refractory-disease
#9
REVIEW
Lisa Argnani, Alessandro Broccoli, Pier Luigi Zinzani
Patients with relapsed or refractory cutaneous T-cell lymphoma (CTCL) display a dismal prognosis and their therapy represents an unmet medical need, as the best treatment strategy is yet to be determined. Exciting data on novel targeted agents are now emerging from recently concluded and ongoing clinical trials in patients with relapsed and refractory CTCL. Three FDA approved compounds are used as single agents including the oral retinoid bexarotene and histone deacetylase inhibitors romidepsin and vorinostat...
December 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/29025909/histone-deacetylase-inhibitors-downregulate-ccr4-expression-and-decrease-mogamulizumab-efficacy-in-ccr4-positive-mature-t-cell-lymphomas
#10
Akihiro Kitadate, Sho Ikeda, Fumito Abe, Naoto Takahashi, Norio Shimizu, Kosei Matsue, Hiroyuki Tagawa
HDAC inhibitors are promising agents for various T-cell lymphomas, including cutaneous T-cell lymphoma, peripheral T-cell lymphoma, and adult T-cell lymphoma/leukemia. CCR4 is an important therapeutic target molecule because mogamulizumab, an anti-CCR4 antibody, has shown promising efficacy against various T-cell lymphomas. In this study, we examined the in vitro synergistic effects of mogamulizumab and HDAC inhibitors against various T-cell lymphomas. First, we examined the expression of CCR4 mRNA and surface CCR4 in various T-cell lymphoma cell lines and found it was downregulated upon treatment with vorinostat, a pan-HDAC inhibitor...
October 12, 2017: Haematologica
https://www.readbyqxmd.com/read/29018892/novel-treatment-opportunities-for-sulfur-mustard-related-cancers-genetic-and-epigenetic-perspectives
#11
REVIEW
Soheila Rahmani, Mohammad Abdollahi
Sulfur mustard (SM), also known as mustard gas, is a chemical weapon which by now has been used in many wars. The most concerning SM toxic effect is probable carcinogenicity. In this study, the genetic and epigenetic mechanisms of SM carcinogenicity, by focusing on treatment of SM-associated malignancies, particularly gene therapeutics, cancer vaccines, and epigenetic medications, have been criticized. The required data were collected through an organized search on valid scientific databases. For SM carcinogenicity due to acute or chronic exposure, the entire original and review articles were evaluated...
October 10, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28972015/synergy-of-bcl2-and-histone-deacetylase-inhibition-against-leukemic-cells-from-cutaneous-t-cell-lymphoma-patients
#12
Benoit M Cyrenne, Julia M Lewis, Jason G Weed, Kacie R Carlson, Fatima N Mirza, Francine M Foss, Michael Girardi
The presence and degree of peripheral blood involvement in patients with cutaneous T-cell lymphoma (CTCL) portend a worse clinical outcome. Available systemic therapies for CTCL may variably decrease tumor burden and improve quality of life, but offer limited effects on survival; thus, novel approaches to the treatment of advanced stages of this non-Hodgkin lymphoma are clearly warranted. Mutational analyses of CTCL patient peripheral blood malignant cell samples suggested the antiapoptotic mediator B-cell lymphoma 2 (BCL2) as a potential therapeutic target...
November 9, 2017: Blood
https://www.readbyqxmd.com/read/28946015/peripheral-t-cell-lymphomas-focusing-on-novel-agents-in-relapsed-and-refractory-disease
#13
REVIEW
Alessandro Broccoli, Lisa Argnani, Pier Luigi Zinzani
Patients with relapsed or refractory peripheral T-cell lymphoma display a dismal prognosis and their therapy represents an unmet medical need, as the best treatment strategy is yet to be determined. Exciting data on novel targeted agents are now emerging from recently concluded and ongoing clinical trials in patients with relapsed and refractory PTCL. Four recently approved compounds are used as single agents: pralatrexate, a novel antifolate agent; romidepsin and belinostat, both histone deacetylase (HDAC) inhibitors; brentuximab vedotin, an anti-CD30 drug-conjugated monoclonal antibody...
November 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28933264/from-a-better-understanding-of-the-mechanisms-of-action-of-histone-deacetylases-inhibitors-to-the-progress-of-the-treatment-of-malignant-lymphomas-and-plasma-cell-myeloma
#14
Romeo-Gabriel Mihăilă
BACKGROUND: Notable progress has been made in chemo- and immunotherapy of B-cell lymphomas, but less in the treatment of T-cell lymphomas. OBJECTIVE: Histone deacetylases inhibitors are a potentially useful therapeutic mean, as an epigenetic dysregulation is present in lymphomas, and especially in T-cell types. We aimed to study the progress made in this area. METHOD: A minireview was achieved using the articles published in PubMed in the last two years and the new patents made in this field...
September 19, 2017: Recent Patents on Anti-cancer Drug Discovery
https://www.readbyqxmd.com/read/28932644/romidepsin-alone-or-in-combination-with-anti-cd20-chimeric-antigen-receptor-expanded-natural-killer-cells-targeting-burkitt-lymphoma-in-vitro-and-in-immunodeficient-mice
#15
Yaya Chu, Ashlin Yahr, Brian Huang, Janet Ayello, Matthew Barth, Mitchell S Cairo
Facilitating the development of alternative targeted therapeutic strategies is urgently required to improve outcome or circumvent chemotherapy resistance in children, adolescents, and adults with recurrent/refractory de novo mature B-cell (CD20) non-Hodgkin lymphoma, including Burkitt lymphoma (BL). Romidepsin, a histone deacetylase inhibitor (HDACi), has been used to treat cutaneous T-cell lymphoma. We have demonstrated the significant anti-tumor effect of anti-CD20 chimeric antigen receptor (CAR) modified expanded peripheral blood natural killer (exPBNK) against rituximab-sensitive and -resistant BL...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28923081/erratum-to-romidepsin-for-the-treatment-of-relapsed-refractory-peripheral-t-cell-lymphoma-prolonged-stable-disease-provides-clinical-benefits-for-patients-in-the-pivotal-trial
#16
Francine Foss, Steven Horwitz, Barbara Pro, H Miles Prince, Lubomir Sokol, Barbara Balser, Julie Wolfson, Bertrand Coiffier
No abstract text is available yet for this article.
September 18, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28858522/chemical-editing-of-macrocyclic-natural-products-and-kinetic-profiling-reveal-slow-tight-binding-histone-deacetylase-inhibitors-with-picomolar-affinities
#17
Betül Kitir, Alex R Maolanon, Ragnhild G Ohm, Ana R Colaço, Peter Fristrup, Andreas S Madsen, Christian A Olsen
Histone deacetylases (HDACs) are validated targets for treatment of certain cancer types and play numerous regulatory roles in biology, ranging from epigenetics to metabolism. Small molecules are highly important as tool compounds for probing these mechanisms as well as for the development of new medicines. Therefore, detailed mechanistic information and precise characterization of the chemical probes used to investigate the effects of HDAC enzymes are vital. We interrogated Nature's arsenal of macrocyclic nonribosomal peptide HDAC inhibitors by chemical synthesis and evaluation of more than 30 natural products and analogues...
September 26, 2017: Biochemistry
https://www.readbyqxmd.com/read/28853310/responses-to-romidepsin-in-patients-with-cutaneous-t-cell-lymphoma-and-prior-treatment-with-systemic-chemotherapy
#18
Madeleine Duvic, Susan E Bates, Richard Piekarz, Robin Eisch, Youn H Kim, Adam Lerner, Tadeusz Robak, Alexey Samtsov, Jürgen C Becker, William McCulloch, Joel Waksman, Sean Whittaker
Cutaneous T-cell lymphomas (CTCL) are a group of non-Hodgkin lymphomas that typically present in the skin but can progress to systemic involvement. The optimal treatment for patients who relapse from or are refractory to systemic chemotherapy remains unclear. Romidepsin is a potent, class-I selective histone deacetylase inhibitor approved for the treatment of patients with CTCL who have had ≥1 prior systemic therapy. Here, we present a subanalysis of two phase-2 trials (NCT00106431, NCT00007345) of romidepsin in patients with CTCL who had prior treatment with systemic chemotherapy...
August 30, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28845251/a5%C3%A2-peripheral-blood-cells-contribute-to-hiv-1-viremia-induced-by-romidepsin
#19
A Winckelmann, K Barton, B Hiener, W Shao, L Østergaard, T Rasmussen, O Søgaard, M Tolstrup, S Palmer
No abstract text is available yet for this article.
March 2017: Virus Evolution
https://www.readbyqxmd.com/read/28829415/simultaneous-measurement-of-hdac1-and-hdac6-activity-in-hela-cells-using-uhplc-ms
#20
Claudia A Simões-Pires, Vincent Zwick, Sylvian Cretton, Muriel Cuendet
The search for new histone deacetylase (HDAC) inhibitors is of increasing interest in drug discovery. Isoform selectivity has been in the spotlight since the approval of romidepsin, a class I HDAC inhibitor for cancer therapy, and the clinical investigation of HDAC6-specific inhibitors for multiple myeloma. The present method is used to determine the inhibitory activity of test compounds on HDAC1 and HDAC6 in cells. The isoform activity is measured using the ultra-high-performance liquid chromatography - mass spectrometry (UHPLC-MS) analysis of specific substrates incubated with treated and untreated HeLa cells...
August 10, 2017: Journal of Visualized Experiments: JoVE
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