scholarly journals C6-ceramide synergistically potentiates the anti-tumor effects of histone deacetylase inhibitors via AKT dephosphorylation and α-tubulin hyperacetylation both in vitro and in vivo

2011 ◽  
Vol 2 (1) ◽  
pp. e117-e117 ◽  
Author(s):  
Q-y Zhu ◽  
Z Wang ◽  
C Ji ◽  
L Cheng ◽  
Y-l Yang ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors ◽  
C6 Ceramide

Histone Deacetylase Inhibitors: Assays to Assess Effectiveness In Vitro and In Vivo

2003 ◽  
pp. 199-205 ◽  
Author(s):  
Victoria M Richon ◽  
Xianbo Zhou ◽  
J.Paul Secrist ◽  
Carlos Cordon-Cardo ◽  
W.Kevin Kelly ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors

scholarly journals Histone Deacetylase Inhibitors with Enhanced Enzymatic Inhibition Effects and Potent in vitro and in vivo Antitumor Activities

ChemMedChem ◽  
2013 ◽  
Vol 9 (3) ◽  
pp. 638-648 ◽  
Author(s):  
Lei Zhang ◽  
Yingjie Zhang ◽  
C. James Chou ◽  
Elizabeth S. Inks ◽  
Xuejian Wang ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors ◽  
Antitumor Activities ◽  
Enzymatic Inhibition

scholarly journals Blocking TH 17-polarizing cytokines by histone deacetylase inhibitors in vitro and in vivo

2008 ◽  
Vol 84 (6) ◽  
pp. 1540-1548 ◽  
Author(s):  
Daniela Bosisio ◽  
Marisa Vulcano ◽  
Annalisa Del Prete ◽  
Marina Sironi ◽  
Valentina Salvi ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors ◽  
Th 17

scholarly journals Improved development of mouse SCNT embryos by chlamydocin analogues, class I and IIa histone deacetylase inhibitors†

2021 ◽  
Author(s):  
Satoshi Kamimura ◽  
Kimiko Inoue ◽  
Eiji Mizutani ◽  
Jin-Moon Kim ◽  
Hiroki Inoue ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors ◽  
Trichostatin A ◽  
Hdac Inhibitors ◽  
Class I ◽  
Cell Stage ◽  
Inhibitory Spectrum ◽  
Developmental Block

Abstract In mammalian cloning by somatic cell nuclear transfer (SCNT), treatment of reconstructed embryos with histone deacetylase (HDAC) inhibitors improves efficiency. So far, most of those used for SCNT are hydroxamic acid derivatives—such as trichostatin A—characterized by their broad inhibitory spectrum. Here, we examined whether mouse SCNT efficiency could be improved using chlamydocin analogues, a family of newly designed agents that specifically inhibit Class I and IIa HDACs. Development of SCNT-derived embryos in vitro and in vivo revealed that four out of five chlamydocin analogues tested could promote the development of cloned embryos. The highest pup rates (7.1 to 7.2%) were obtained with Ky-9, similar to those achieved with trichostatin A (7.2 to 7.3%). Thus, inhibition of Class I and/or IIa HDACs in SCNT-derived embryos is enough for significant improvements in full-term development. In mouse SCNT, the exposure of reconstructed oocytes to HDAC inhibitors is limited to 8–10 h because longer inhibition with Class I inhibitors causes a 2-cell developmental block. Therefore, we used Ky-29, with higher selectivity for Class IIa than Class I HDACs for longer treatment of SCNT-derived embryos. As expected, 24-h treatment with Ky-29 up to the 2-cell stage did not induce a developmental block, but the pup rate was not improved. This suggests that the 1-cell stage is a critical period for improving SCNT cloning using HDAC inhibitors. Thus, chlamydocin analogues appear promising for understanding and improving the epigenetic status of mammalian SCNT-derived embryos through their specific inhibitory effects on HDACs.

48 TREATMENT OF CLONED BOVINE EMBRYOS WITH HISTONE DEACETYLASE INHIBITORS INCREASES IN VITRO DEVELOPMENT BUT NOT IN VIVO CLONING EFFICIENCY

2009 ◽  
Vol 21 (1) ◽  
pp. 124
Author(s):  
J. E. Oliver ◽  
T. Delaney ◽  
J. N. Oswald ◽  
M. C. Berg ◽  
B. Oback ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Nuclear Transfer ◽  
Histone Deacetylase Inhibitors ◽  
Trichostatin A ◽  
Cloning Efficiency ◽  
In Vitro Development ◽  
Significant Difference ◽  
Vitro Development

Previous studies in the mouse have shown treatment of somatic cell nuclear transfer (SCNT) embryos with histone deacetylase inhibitors (HDACi) to significantly increase cloning efficiency (Kishigami S et al. 2006 BBRC 340, 183–189; van Thuan N 2007 Asian Reproductive Biology Society 4, 9 abst). Increasing histone acetylation may open donor chromatin allowing better access for oocyte cytoplasmic factors to facilitate reprogramming. Here, we determined the effect of two HDACi, Trichostatin A (TSA), and scriptaid (Sigma-Aldrich, Castle Hill, NSW, Australia), on bovine cloning efficiency. Zona-free SCNT was performed with serum starved fibroblasts fused to enucleated MII-arrested IVM oocytes. After 4 h, reconstructs were activated with 5 μm ionomycin and 2 mm 6-dimethylaminopurine (DMAP) and cultured individually in 5 μL drops of AgResearch synthetic oviduct fluid (SOF) medium. Treatment with HDACi commenced concomitant with the 4 h DMAP incubation and continued in SOF for the remainder of the treatment period; totalling either 18 or 48 h post activation (hpa). TSA concentrations examined were: 0, 5, 50, and 500 nm, with all treatments containing 0.5% DMSO (n = 1121). Following TSA treatment, increased histone (H) acetylation at lysine (K) of H4K5 was confirmed by semi-quantitative immunofluorescence at the eight-cell stage. Scriptaid concentrations examined were: 0, 5, 50, 250, and 1000 nm, with all treatments containing 0.5% DMSO during DMAP and 0.1% DMSO during IVC (n = 1059). In vitro development on Day 7 was expressed in terms of transferable quality embryos as a percentage of reconstructs cultured. Data were analyzed using a generalized linear model with binomial variation and logit link. Embryos from selected treatments were transferred singularly to recipient cows on Day 7 with pregnancy data analyzed using Fisher’s exact test. Day 7 in vitro development was significantly greater with 5 nm TSA treatment for 18 hpa compared to controls (47.1% v. 34.5%; P < 0.02). Treatment of embryos with TSA for 48 hpa had no effect at any concentration tested. In contrast, scriptaid treatment for 18 hpa had no effect in vitro, while exposure for 48 hpa at 1000 nm significantly increased the development of transferable quality embryos compared to 0 nm (44.0% v. 32.4%; P < 0.005). There was no significant difference in embryo survival rates at D150 of gestation between embryos treated with 0 or 5 nm TSA for 18 hpa (8/48 v. 10/48; 16.7% v. 20.8%). However, in vivo development at Day 150 of gestation following treatment of embryos with 1000 nm scriptaid for 48 hpa was significantly lower compared to controls (1/37 v. 6/31; 2.7% v. 19.4%; P < 0.05). Contrary to the mouse, TSA or scriptaid treatment as used in this study did not increase cloning efficiency in cattle. The use of various HDACi either alone or in combination with DNA demethylating agents may still prove beneficial for reprogramming following nuclear transfer. Supported by FRST C10X0303.

Histone Deacetylase Inhibitors Potentiate the Lethality of the Irreversible Proteasome Inhibitor Carfilzomib In Mantle Cell Lymphoma Cells In Vitro and In Vivo

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 3938-3938 ◽  
Author(s):  
Girija Dasmahapatra ◽  
Dmitry Lembersky ◽  
Jonathan W. Friedberg ◽  
Richard I Fisher ◽  
Paul Dent ◽  
...  
Keyword(s):  
Histone Deacetylase ◽  
Histone Deacetylase Inhibitors ◽  
Combined Treatment ◽  
Single Agent ◽  
Cell Types ◽  
Jnk Signaling ◽  
Mantle Cell ◽  
Agent Treatment

Abstract Abstract 3938 The proteasome inhibitor (PI) bortezomib (BTZ) is approved for the treatment of refractory mantle cell lymphoma (MCL). However, BTZ achieves clinical responses in only 40% of refractory MCL patients, justifying the search for newer proteasome inhibitors and/or the development of rational combination regimens. Recently we reported that the irreversible PI carfilzomib (CFZ) interacted synergistically with the histone deacetylase inhibitor (HDACI) vorinostat (Vor) in diverse DLBCL cells including GC (germinal center) and ABC (activated B-cell) sub-types both in vitro and in vivo. (Dasmahapatra et al., Blood 2010; 115:4478-87, 2010). Moreover, regimens combining PIs with histone deacetylase inhibitors (HDACIs) have shown promising activity in multiple myeloma. Collectively, these preclinical and clinical findings raise the possibility combining CFZ with HDACIs might be an effective strategy in MCL. To test this possibility, CFZ/HDACI interactions were investigated in diverse MCL cell types, including those resistant to BTZ. Simultaneous treatment (24-48 hr) with sub-lethal CFZ concentrations (2-5 nM) and minimally toxic concentrations of vorinostat (Vor; 1–2 μM), SNDX-275 (1-2 μM) or SBHA (30-50 μM) strikingly increased apoptosis (manifested by annexin V, 7-AAD or TUNEL positivity) in various MCL lines, including Granta, HF-4B, Rec-1, JVM-2, MINO and JVM-12. Interactions were highly synergistic, as determined by Median Dose Effect analysis, with Combination Index values significantly less than 1.0. HDACIs also interacted synergistically with ONX 0912 (formerly PR-047), an orally bioavailable analog of CFZ. The activity of these regimens was associated with a sharp increase in caspase-3 activation, PARP cleavage, mitochondrial damage (loss of ΔΨm, cytoplasmic cytochrome c release), and induction of p21CIP1. Combined CFZ/Vor exposure also markedly induced phosphorylation of JNK and c-Jun, down-regulation of phospho-AKT and phospho-ERK1/2, and induction of γH2A.X, a marker of double-stranded DNA breaks. In contrast to single agent administration (48 hr), where the percentage of apoptotic cells gradually declined following drug washout over the ensuing 4–5 days, extensive apoptosis (e.g. > 80%) persisted in cells co-treated with CFZ/Vor. Combined treatment of MCL cells with CFZ/Vor induced more sustained inhibition of chymotrypsin-like (CT-L) proteasome activity than that observed following single-agent treatment. CFZ alone exhibited partial cross resistance to BTZ- resistant Granta cells (GR-25BR). However, co-administration of CFZ/Vor resulted in the highly synergistic induction of apoptosis in BTZ-resistant cells. Genetic interruption of JNK signaling (e.g., via shRNA knockdown) significantly attenuated CFZ/Vor-mediated apoptosis, indicating that JNK activation plays a functional role in the lethality of this regimen in MCL cells. Combined treatment with CFZ and HDACIs induced G2M arrest in both parental and BTZ-resistant GR-25BR cells, an effect that was not modified by genetic interruption of JNK signaling. The CFZ/Vor regimen also strikingly induced apoptosis in 3 primary human MCL specimens, in contrast to the minimal lethality exhibited toward normal CD34+ cells as previously described (Blood; 115:4478-87, 2010). Finally, in vivo administration of CFZ (IV BIW) and Vor (IP TIW) to Beige-nude-XID mice (NIH-III) inoculated in the flank with Granta cells substantially suppressed tumor growth compared to single agent treatment. Collectively, these findings indicate that combining HDACIs with CFZ synergistically induces apoptosis in MCL cells through a JNK-dependent mechanism in association with G2M arrest and the induction of DNA damage. They also suggest that this strategy, which is active against diverse MCL cell types, including BTZ-resistant and primary MCL cells, and which displays in vivo activity, warrants further examination in MCL. Accordingly, plans for a Phase I CFZ/HDACI trial in NHL, including MCL patients, are currently underway. Supported by Lymphoma SPORE 1P50 CA130805. Disclosures: Friedberg: Genentech: Honoraria.

Two novel histone deacetylase inhibitors NVP-LAQ824 and NVP-LBH589 are active against biliary tract cancer and potentiate the efficacy of gemcitabine

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 4149-4149 ◽  
Author(s):  
M. Wiedmann ◽  
T. Bluethner ◽  
M. Niederhagen ◽  
K. Schoppmeyer ◽  
J. Moessner ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Histone Deacetylase ◽  
Cell Lines ◽  
Biliary Tract ◽  
Biliary Tract Cancer ◽  
Histone Deacetylase Inhibitors ◽  
Tract Cancer ◽  
Mib 1

4149 Background: Chromatin remodelling agents such as histone deacetylase inhibitors have been shown to modulate gene expression in tumor cells and inhibit tumor growth and angiogenesis. NVP-LAQ824 and NVP-LBH589 are two novel chemical entities belonging to a cinnamic hydroxamic acid class of compounds. Little is known about their efficacy for the treatment of biliary tract cancer. Methods: Cell-growth inhibition by NVP-LAQ824 and NVP-LBH589 was studied in vitro in 7 human biliary tract cancer cell lines by MTT assay. In addition, the anti-tumoral effect of NVP-LBH589 was studied in a chimeric mouse model. Anti-tumoral drug mechanism was assessed by immunoblotting for p21WAF-1, acH3Lys9 and acH4, cell cycle analysis, PARP assay, TUNEL assay, and immunhistochemistry for MIB-1. Results: In vitro treatment with both compounds significantly suppressed the growth of all cancer cell lines (mean IC50 (3d) 0.08 and 0.04 μM, respectively) and was associated with hyperacetylation of nucleosomal histones H3 and H4, increased expression of p21WAF-1, cell cycle arrest at G2/M-checkpoint, and induction of apoptosis (PARP cleavage). After 28 d, NVP-LBH589 reduced tumor mass by 66% (bile duct cancer) and 87% (gallbladder cancer) in vivo in comparison to placebo and potentiated the efficacy of gemcitabine. Further analysis of the tumor specimens revealed increased apoptosis (TUNEL) and reduced cell proliferation (MIB-1). Conclusions: Our findings suggest that NVP-LBH589 > NVP-LAQ824 are active against human biliary tract cancer in vitro. In addition, NVP-LBH589 demonstrated significant in vivo activity and potentiated the efficacy of gemcitabine. Therefore, further clinical evaluation of this new drug for the treatment of biliary tract cancer is recommended. No significant financial relationships to disclose.

scholarly journals CN133, a Novel Brain-Penetrating Histone Deacetylase Inhibitor, Hampers Tumor Growth in Patient-Derived Pediatric Posterior Fossa Ependymoma Models

Cancers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1922
Author(s):  
Roberta Antonelli ◽  
Carlos Jiménez ◽  
Misha Riley ◽  
Tiziana Servidei ◽  
Riccardo Riccardi ◽  
...  
Keyword(s):  
Tumor Growth ◽  
Histone Deacetylase ◽  
Posterior Fossa ◽  
Histone Deacetylase Inhibitors ◽  
Pediatric Ependymoma ◽  
Apoptotic Pathways ◽  
Induced Apoptosis ◽  
The Unfolded Protein Response

Pediatric ependymoma (EPN) is a highly aggressive tumor of the central nervous system that remains incurable in 40% of cases. In children, the majority of cases develop in the posterior fossa and can be classified into two distinct molecular entities: EPN posterior fossa A (PF-EPN-A) and EPN posterior fossa B (PF-EPN-B). Patients with PF-EPN-A have poor outcome and are in demand of new therapies. In general, PF-EPN-A tumors show a balanced chromosome copy number profile and have no recurrent somatic nucleotide variants. However, these tumors present abundant epigenetic deregulations, thereby suggesting that epigenetic therapies could provide new opportunities for PF-EPN-A patients. In vitro epigenetic drug screening of 11 compounds showed that histone deacetylase inhibitors (HDACi) had the highest anti-proliferative activity in two PF-EPN-A patient-derived cell lines. Further screening of 5 new brain-penetrating HDACi showed that CN133 induced apoptosis in vitro, reduced tumor growth in vivo and significantly extended the survival of mice with orthotopically-implanted EPN tumors by modulation of the unfolded protein response, PI3K/Akt/mTOR signaling, and apoptotic pathways among others. In summary, our results provide solid preclinical evidence for the use of CN133 as a new therapeutic agent against PF-EPN-A tumors.

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