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https://www.readbyqxmd.com/read/28109123/sodium-butyrate-protects-against-high-fat-diet-induced-cardiac-dysfunction-and-metabolic-disorders-in-type-ii-diabetic-mice
#1
Ling Zhang, Jianfeng Du, Naohiro Yano, Hao Wang, Yu Tina Zhao, Dubielecka-Szczerba Patricia, Shougang Zhuang, Eugene Y Chin, Gangjian Qin, Ting C Zhao
Histone deacetylases are recently identified to act as key regulators for cardiac pathophysiology and metabolic disorders. However, the function of histone deacetylase (HDAC) in controlling cardiac performance in type II diabetes and obesity remains unknown. Here we determine whether HDAC inhibition attenuates high fat diet (HFD)-induced cardiac dysfunction and improves metabolic features. Adult mice were fed with either HFD or standard chow food for 24 weeks. Starting at 12 weeks, mice were divided into four groups randomly, in which sodium butyrate (1%), a potent HDAC inhibitor, was provided to chow and HFD-fed mice in drinking water, respectively...
January 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28108250/synthesis-of-vorinostat-and-cholesterol-conjugate-to-enhance-the-cancer-cell-uptake-selectivity
#2
Nethrie D Idippily, Chunfang Gan, Paul Orefice, Jane Peterson, Bin Su
Histone deacetylase (HDAC) inhibitors modulate various cellular functions including proliferation, differentiation, and apoptosis. Vorinostat (SuberAniloHydroxamic Acid, SAHA) is the first HDAC inhibitor approved by FDA for cancer treatment. However, SAHA distributes in cancer tissue and normal tissue in similar levels. It will be ideal to selectively deliver SAHA into cancer cells. Rapidly growing cancer cells have a great need of cholesterol. Low-density lipoprotein (LDL) is the major cholesterol carrier in plasma and its uptake is mediated by LDL-receptor (LDL-R), a glycoprotein overexpressed on the surface of cancer cells...
January 10, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28107750/effect-of-clinically-approved-hdac-inhibitors-on-plasmodium-leishmania-and-schistosoma-parasite-growth
#3
Ming Jang Chua, Megan S J Arnold, Weijun Xu, Julien Lancelot, Suzanne Lamotte, Gerald F Späth, Eric Prina, Raymond J Pierce, David P Fairlie, Tina S Skinner-Adams, Katherine T Andrews
Malaria, schistosomiasis and leishmaniases are among the most prevalent tropical parasitic diseases and each requires new innovative treatments. Targeting essential parasite pathways, such as those that regulate gene expression and cell cycle progression, is a key strategy for discovering new drug leads. In this study, four clinically approved anti-cancer drugs (Vorinostat, Belinostat, Panobinostat and Romidepsin) that target histone/lysine deacetylase enzymes were examined for in vitro activity against Plasmodium knowlesi, Schistosoma mansoni, Leishmania amazonensis and L...
December 23, 2016: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28107697/egcg-a-tea-polyphenol-as-a-potential-mitigator-of-hematopoietic-radiation-injury-in-mice
#4
Mrinalini Tiwari, Bhakti Dixit, Suhel Parvez, Paban K Agrawala
Agents capable of providing protection, mitigation or therapy against radiation injuries have long been of interest of radiation biologists owing to the ever expanding application of radiation in our day to day life despite the well reported ill effects of exposure. The current study investigates radiomitigating potential of EGCG (epigallocatechin gallate), a tea polyphenol with known DNMT inhibitory property, in C57 Bl/6 mice model. Treatment with 0.1833mg/kg body weight EGCG, 1.5h post-irradiation to lethally whole body irradiated mice rendered 45% survival for 30days and also helped restoring the body weight of the animals...
January 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28107195/a-new-hdac-inhibitor-cinnamoylphenazine-shows-antitumor-activity-in-association-with-intensive-macropinocytosis
#5
Bing-Yan Zhu, Bo-Yang Shang, Yue Du, Yi Li, Liang Li, Xian-Dong Xu, Yong-Su Zhen
Previous studies have shown that intensive macropinocytosis occurs in cancer cells and neutral red (NR) is noted for its capability to enter into the cell massively through a process mimetic to macropinocytosis. In addition, trans-cinnamic acid (tCA) has been found to be an inhibitor of histone deacetylase (HDAC). In the present study, cinnamoylphenazine (CA-PZ) that consists of NR and tCA moieties was synthesized and evaluated. As shown, CA-PZ massively entered into colon carcinoma HT-29 cells and pancreatic carcinoma MIA PaCa-2 cells and this entry was blocked by 5-(N-ethyl-N-isopropyl) amiloride (EIPA, an inhibitor of macropinocytosis), indicating a macropinocytosis-mediated uptake...
January 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28103535/down-regulation-of-histone-deacetylase-4-5-and-6-as-a-mechanism-of-synergistic-enhancement-of-apoptosis-in-human-lung-cancer-cells-treated-with-the-combination-of-a-synthetic-retinoid-am80-and-green-tea-catechin
#6
Yukiko Oya, Anupom Mondal, Anchalee Rawangkan, Sonthaya Umsumarng, Keisuke Iida, Tatsuro Watanabe, Miki Kanno, Kaori Suzuki, Zhenghao Li, Hiroyuki Kagechika, Koichi Shudo, Hirota Fujiki, Masami Suganuma
(-)-Epigallocatechin gallate (EGCG), a green tea catechin, acts as a synergist with various anticancer drugs, including retinoids. Am80 is a synthetic retinoid with a different structure from all-trans-retinoic acid: Am80 is now clinically utilized as a new drug for relapsed and intractable acute promyelocytic leukemia patients. Our experiments showed that the combination of EGCG and Am80 synergistically induced both apoptosis in human lung cancer cell line PC-9 and up-regulated expressions of growth arrest and DNA damage-inducible gene 153 (GADD153), death receptor 5, and p21(waf1) genes in the cells...
January 8, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28102705/the-acetyl-code-in-rheumatoid-arthritis-and-other-rheumatic-diseases
#7
Chiara Angiolilli, Dominique L Baeten, Timothy R Radstake, Kris A Reedquist
Growing evidence supports the idea that aberrancies in epigenetic processes contribute to the onset and progression of human immune-mediated inflammatory diseases, such as rheumatoid arthritis (RA). Epigenetic regulators of histone tail modifications play a role in chromatin accessibility and transcriptional responses to inflammatory stimuli. Among these, histone deacetylases (HDACs) regulate the acetylation status of histones and nonhistone proteins, essential for immune responses. Broad-spectrum HDAC inhibitors are well-known anti-inflammatory agents and reduce disease severity in animal models of arthritis; however, selective HDAC inhibitors remain poorly studied...
January 19, 2017: Epigenomics
https://www.readbyqxmd.com/read/28102109/epigenetic-regulation-of-rgs2-regulator-of-g-protein-signaling-2-in-chemoresistant-ovarian-cancer-cells
#8
Ercan Cacan
Regulator of G-protein signaling 2 (RGS2) is a GTPase-activating protein functioning as an inhibitor of G-protein coupled receptors (GPCRs). RGS2 dysregulation was implicated in solid tumour development and RGS2 downregulation has been reported in prostate and ovarian cancer progression. However, the molecular mechanism by which RGS2 expression is suppressed in ovarian cancer remains unknown. The expression and epigenetic regulation of RGS2 in chemosensitive and chemoresistant ovarian cancer cells were determined by qRT-PCR and chromatin immunoprecipitation assays, respectively...
January 19, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28101176/anticancer-effects-of-valproic-acid-on-oral-squamous-cell-carcinoma-via-sumoylation-in-vivo-and-in-vitro
#9
Zhijian Sang, Yang Sun, Hong Ruan, Yong Cheng, Xiaojun Ding, Youcheng Yu
Aberrant histone deacetylase (HDAC) has a key role in the neoplastic process associated with the epigenetic patterns of tumor-related genes. The present study was performed to investigate the effects and determine the mechanism of action of the HDAC inhibitor, valproic acid (VPA), on the CAL27 cell line derived from oral squamous cell carcinoma (OSCC). The effects of VPA on the viability of CAL27 cells were investigated using MTT assays. Alterations in the cell cycle and apoptosis were also examined using propidium iodide (PI) and Annexin V-PI assays, and were subequently analyzed by flow cytometry...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28099914/advances-in-epigenetic-glioblastoma-therapy
#10
Dong Hoon Lee, Hyun-Wook Ryu, Hye-Rim Won, So Hee Kwon
Glioblastoma multiforme (GBM) is the most lethal primary brain tumor in adults despite contemporary gold-standard first-line treatment strategies. This type of tumor recurs in virtually all patients and no commonly accepted standard treatment exists for the recurrent disease. Therefore, advances in all scientific and clinical aspects of GBM are urgently needed. Epigenetic mechanisms are one of the major factors contributing to the pathogenesis of cancers, including glioblastoma. Epigenetic modulators that regulate gene expression by altering the epigenome and non-histone proteins are being exploited as therapeutic drug targets...
January 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28099148/suberoylanilide-hydroxamic-acid-increases-anti-cancer-effect-of-tumor-necrosis-factor-%C3%AE-through-up-regulation-of-tnf-receptor-1-in-lung-cancer-cells
#11
Bo Ra You, Bo Ram Han, Woo Hyun Park
Suberoylanilide hydroxamic acid (SAHA) as a histone deacetylase (HDAC) inhibitor has anti-cancer effect. Here, we evaluated the effect of SAHA on HDAC activity and cell growth in many normal lung and cancer cells. We observed that the HDAC activities of lung cancer cells were higher than that of normal lung cells. SAHA inhibited the growth of lung cancer cells regardless of the inhibitory effect on HDAC. This agent induced a G2/M phase arrest and apoptosis, which was accompanied by mitochondrial membrane potential (MMP: ΔΨm) loss in lung cancer cells...
January 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28092474/novel-histone-deacetylase-6-hdac6-selective-inhibitors-a-patent-evaluation-wo2014181137
#12
Claudia A Simões-Pires, Philippe Bertrand, Muriel Cuendet
The invention described in this patent (WO2014181137) is related to hydroxamic acid derivatives with inhibitory activity towards histone deacetylases (HDACs), their synthetic process and pharmaceutical formulations, as well as a method for treating patients suffering from a list of selected tumoral, inflammatory, cardiac and chronic disorders. HDACs are known to deacetylate histones and other proteins, which makes HDAC inhibitors able to affect cell survival, cell signaling, transport, and gene expression. Those effects have been associated to the therapeutic success of HDAC inhibitors...
January 16, 2017: Expert Opinion on Therapeutic Patents
https://www.readbyqxmd.com/read/28089578/dual-influences-of-early-life-maternal-deprivation-on-histone-deacetylase-activity-and-recognition-memory-in-rats
#13
Manoel Osório Albuquerque Filho, Betânia Souza de Freitas, Rebeca Carvalho Lacerda Garcia, Pedro Castilhos de Freitas Crivelaro, Nadja Schröder, Maria Noêmia Martins de Lima
Exposure to stress early in life may negatively impact nervous system functioning, including increasing the proneness to learning and memory impairments later in life. Maternal deprivation, a model of early-life stress, hinders memory in adult rats and lessens brain-derived neurotrophic factor (BDNF) levels in the hippocampus in a very heterogeneous way among individuals. The main goal of the present study was to investigate the possible epigenetic modulation underlying recognition memory impairment and reduced BDNF levels in the hippocampus of adult maternally deprived rats...
January 9, 2017: Neuroscience
https://www.readbyqxmd.com/read/28078999/hdacs-and-hdac-inhibitors-in-urothelial-carcinoma-perspectives-for-an-antineoplastic-treatment
#14
Maria Pinkerneil, Michèle J Hoffmann, Wolfgang A Schulz, Günter Niegisch
Histone deacetylases (HDACs) influence diverse cellular processes and may contribute to tumor development and progression by multiple mechanisms. Class I HDACs are often overexpressed in cancers contributing to a genome-wide epigenetic state permitting increased proliferation, and diminished apoptosis and cell differentiation. Class IIA and IIB isoenzymes may likewise contribute to tumorigenesis as components of specific intranuclear repressor complexes or regulators of posttranslational protein modifications...
January 11, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28078985/designing-isoform-selective-inhibitors-against-classical-hdacs-for-effective-anticancer-therapy-insight-and-perspectives-from-in-silico
#15
Shabir Ahmad Ganai
Histone deacetylase inhibitors, the small molecules modulating the biological activity of histone deacetylases are emerging as potent chemotherapeutic agents. Despite their considerable therapeutic benefits in disease models, the lack of isoform specificity culminates in debilitating off target effects, raising serious concerns regarding their applicability. This emphasizes the pressing and unmet medical need of designing isoform selective inhibitors for safe and effective anticancer therapy. Keeping these grim facts in view, the current article sheds light on structural basis of off-targeting...
12, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28073598/hdac10-as-a-potential-therapeutic-target-in-ovarian-cancer
#16
Muhtadi M Islam, Tapahsama Banerjee, Colin Z Packard, Shweta Kotian, Karuppaiyah Selvendiran, David E Cohn, Jeffrey D Parvin
OBJECTIVE: We analyzed histone deacetylase 10 (HDAC10) for function in the context of the DNA damage response in BRCA1-null ovarian cancer cells as well as evaluated the potential of general HDAC inhibitors in primary ovarian carcinoma cells. HDAC10 had previously been shown to be highly stimulatory to the process of homology directed repair in HeLa cells, and in this study we investigated whether HDAC10 could impact in vitro the response to anticancer therapies. We hypothesized that the loss of HDAC10 would sensitize cells to platinum therapy...
January 7, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28070968/bacterial-short-chain-fatty-acid-metabolites-modulate-the-inflammatory-response-against-infectious-bacteria
#17
R O Corrêa, A Vieira, E M Sernaglia, M Lancellotti, A T Vieira, M J Avila-Campos, H G Rodrigues, M A R Vinolo
Short chain fatty acids (SCFAs), predominately acetic, propionic and butyric acids, are bacterial metabolites with an important role in the maintenance of homeostasis due to their metabolic and immunomodulatory actions. Some evidence suggests that they may also be relevant during infections. Therefore, we aimed to investigate the effects of SCFAs in the effector functions of neutrophils to an opportunistic pathogenic bacteria, Aggregatibacter actinomycetemcomitans (A. actinomycetemcomitans). Using a subcutaneous model to generate a mono, isolated infection of A...
January 9, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28063389/g-quadruplex-based-fluorometric-biosensor-for-label-free-and-homogenous-detection-of-protein-acetylation-related-enzymes-activities
#18
Huixia Wang, Yong Li, Kunli Zhao, Siyi Chen, Qin Wang, Bin Lin, Zhou Nie, Shouzhuo Yao
Reversible protein acetylation, one of the key types of post-translational modifications, is composed of histone acetylation and deacetylation, which is typically catalyzed by histone acetyltransferases (HATs) and histone deacetylases (HDACs) respectively. Herein, a label-free fluorescent method has been established for the homogeneous bioassay of HAT/HDAC activity and respective inhibitors. The proposed approach is primarily based on the electrostatic interaction between G-quadruplexes (G4s) and acetylation-related peptides, which results in marked change of fluorescent intensity of G4/Thioflavin T (ThT) complexes...
December 30, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28063219/microrna-1-overexpression-blunts-cardiomyocyte-hypertrophy-elicited-by-thyroid-hormone
#19
Gabriela Placoná Diniz, Caroline Antunes Lino, Camila Rodrigues Moreno, Nathalia Senger, Maria Luiza Morais Barreto-Chaves
It is well known that increased thyroid hormone (TH) levels induce cardiomyocyte growth. MicroRNAs (miRNAs) have been identified as key players in cardiomyocyte hypertrophy, which is associated with increased risk of heart failure. In this study, we evaluated the miR-1 expression in TH-induced cardiac hypertrophy, as well as the potential involvement of miR-1 in cardiomyocyte hypertrophy elicited by TH in vitro. The possible role of Type 1 angiotensin II receptor (AT1R) in the effect promoted by TH in miR-1 expression was also evaluated...
January 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28062671/targeting-hdac3-in-crebbp-mutant-lymphomas-counterstrikes-unopposed-enhancer-deacetylation-of-b-cell-signaling-and-immune-response-genes
#20
Uta E Höpken
The cellular phenotype of B-cell lymphomas arising from B cells undergoing germinal center reactions, such as follicular lymphoma and diffuse large B-cell lymphoma, is strongly shaped by mutations in chromatin-modifying genes. The work presented by Jiang and colleagues addresses how somatic mutations in CREBBP disable acetylation and cause unopposed deacetylation by BCL6/SMRT/HDAC3 complexes on enhancers of B-cell signaling and immune response genes. This opens a therapeutic avenue toward targeted inhibition of CREBBP-mutant lymphomas by HDAC inhibitors...
January 2017: Cancer Discovery
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