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Drug repurposing of histone deacetylase inhibitors that alleviate neutrophilic inflammation in acute lung injury and idiopathic pulmonary fibrosis via inhibiting leukotriene a4 hydrolase and blocking LTB4 biosynthesis 被引量:4
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作者 Wei-qiang LU Jing-yuan WANG +4 位作者 Xue YAO Ping OUYANG Ning-ning DONG Dang WU Jin HUANG 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2017年第10期972-972,共1页
OBJECTIVE Leukotriene B4(LTB4)biosynthesis and subsequently neutrophilic inflammation may provide a potential strategy for the treatment of acute lung injury(ALI)or idiopathic pulmonary fibrosis(IPF).To provide a pote... OBJECTIVE Leukotriene B4(LTB4)biosynthesis and subsequently neutrophilic inflammation may provide a potential strategy for the treatment of acute lung injury(ALI)or idiopathic pulmonary fibrosis(IPF).To provide a potential strategy for the treatment of ALI or IPF,we identified potent inhibitors of Leukotriene A4 hydrolase(LTA4H),a key enzyme in the biosynthesis of LTB4.METHODS In this study,we identified two known histone deacetylase(HDAC)inhibitors,suberanilohydroxamic acid(SAHA)and its analogue 4-(dimethylamino)-N-[7-(hydroxyamino)-7-oxoheptyl]benzamide(M344),as effective inhibitors of LTA4H using enzymatic assay,thermofluor assay,and X-ray crystallographic investigation.We next tested the effect of SAHA and M344 on endogenous LTB4 biosynthesis in neutrophils by ELISA and neutrophil migration by transwell migration assay.A murine experimental model of ALI was induced by lipopolysaccharide(LPS)inhalation.Histopathological analysis of lung tissue using H&E staining revealed the serious pulmonary damage caused by LPS treatment and the effect of the SAHA.We next examined m RNA and protein levels of pro-inflammatory cytokines in lung tissue and bronchoalveolar lavage fluid using q RT-PCR and ELISA to further investigate the underlying mechanisms of anti-inflammatory activities by SAHA.We also investigated the effects of SAHA and M344 on a murine experimental model of bleomycin(BLM)-induced IPF model.RESULTS The results of enzymatic assay and X-ray crystallography showed that both SAHA and M344 bind to LTA4H,significantly decrease LTB4 levels in neutrophil,and markedly diminish early neutrophilic inflammation in mouse models of ALI and IPF under a clinical safety dose.CONCLUSION Collectively,SAHA and M344 would provide promising agents with well-known clinical safety for potential treatment in patients with ALI and IPF via pharmacologically inhibiting LAT4H and blocking LTB4 biosynthesis. 展开更多
关键词 acute lung injury idiopathic pulmonary fibrosis histone deacetylase inhibitors alleviate neutrophilic inflammation leukotriene A4 hydrolase leukotriene B4
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Induction of Myelogenous Leukemia Cells with Histone Deacetylase Inhibitors through Down-regulating the Daxx Protein Expression
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作者 李春蕊 周剑峰 +3 位作者 吴雪琼 田野 邓金牛 刘文励 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2009年第5期546-550,共5页
The effects of two different histone deacetylase (HDAC) inhibitors, sodium butyrate (NAB) and trichostatin A (TSA),on apoptosis of human leukemic cells in vitro and the molecular mechanisms were investigated. Th... The effects of two different histone deacetylase (HDAC) inhibitors, sodium butyrate (NAB) and trichostatin A (TSA),on apoptosis of human leukemic cells in vitro and the molecular mechanisms were investigated. The experiments were divided up 5 groups: control group, NaB group, TSA group, NaB+Z-VAD-FMK group and TSA+Z-VAD-FMK group. The apoptosis rate was determined by mor- phological analysis and flow cytomytry. The expression of Daxx, Bcl-2, and Bcl-xl proteins was detected by Western blot. NaB and TSA could induce the apoptosis of HL-60 and K562 cells, and Z-VAD-FMK caused a marked decrease in apoptosis induced by HDAC inhibitors. HDAC inhibitors could down-regulate the expression of Daxx protein, but had no significant influence on the expression of Bcl-2 and Bcl-xl proteins. The results suggested that NaB and TSA induce distinct caspase-dependent apoptosis of human leukemic cells through down-regulating the expression of Daxx protein in vitro. 展开更多
关键词 histone deacetylase inhibitors apoptosis LEUKEMIA CASPASES DAXX
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Experimental treatment of pancreatic cancer with two novel histone deacetylase inhibitors 被引量:2
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作者 Martin Haefner Thilo Bluethner +5 位作者 Manuel Niederhagen Christian Moebius Christian Wittekind Joachim Mossner Karel Caca Marcus Wiedmann 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第23期3681-3692,共12页
AIM:To investigate in vitro and in vivo treatment with histone deacetylase inhibitors NVP-LAQ824 and NVP-LBH589 in pancreatic cancer. METHODS:Cell-growth inhibition by NVP-LAQ824 and NVP-LBH589 was studied in vitro in... AIM:To investigate in vitro and in vivo treatment with histone deacetylase inhibitors NVP-LAQ824 and NVP-LBH589 in pancreatic cancer. METHODS:Cell-growth inhibition by NVP-LAQ824 and NVP-LBH589 was studied in vitro in 8 human pancreatic cancer cell lines using the 3-(4,5-dimethylthiazol-2-yl) -2,5-diphenyltetrazolium bromide(MTT) assay. In addition,the anti-tumoral effect of NVP-LBH589 was studied in a chimeric mouse model. Anti-tumoral activity of the drugs was assessed by immunoblotting for p21WAF-1,acH4,cell cycle analysis,TUNEL assay,and immunohistochemistry for MIB-1. RESULTS:In vitro treatment with both compounds significantly suppressed the growth of all cancer cell lines and was associated with hyperacetylation of nucleosomal histone H4,increased expression of p21WAF-1,cell cycle arrest at G2/M-checkpoint,and increased apoptosis. In vivo,NVP-LBH589 alone significantly reduced tumor mass and potentiated the efficacy of gemcitabine. Further analysis of the tumor specimens revealed slightly increased apoptosis and no significant reduction of cell proliferation.CONCLUSION:Our findings suggest that NVP-LBH589 and NVP-LAQ824 are active against human pancreatic cancer,although the precise mechanism of in vivo drug action is not yet completely understood. Therefore,further preclinical and clinical studies for the treatment of pancreatic cancer are recommended. 展开更多
关键词 histone deacetylase inhibitor Pancreatic cancer NVP-LAQ824 NVP-LBH589
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Effects of histone deacetylase inhibitors on transcriptional regulation of the hsp70 gene in Drosophila
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作者 Yan Mei Zhao Xia Chen Hui Sun Zhi Gen Yuan Guo Ling Ren Xiao Xue Li Jun Lu Bai Qu Huang 《Cell Research》 SCIE CAS CSCD 2006年第6期566-576,共11页
Histone acetyltransferases/deacetylases contribute to the activation or inactivation of transcription by modifying the structure of chromatin. Here we examined the effects ofhistone deacetylase inhibitors (HDIs), tr... Histone acetyltransferases/deacetylases contribute to the activation or inactivation of transcription by modifying the structure of chromatin. Here we examined the effects ofhistone deacetylase inhibitors (HDIs), trichostatin A, and sodium butyrate on hsp70 gene transcriptional regulation in Drosophila. The chromatin immunoprecipitation assays revealed that HDI treatments induced the hyperacetylation of histone H3 at the promoter and the transcribing regions of hsp 70 gene, increased the accessibility of heat-shock factor to target heat-shock element, and promoted the RNA polymerase Ⅱ-mediated transcription. Moreover, the quantitative real-time PCR confirmed that the HDI-induced hyperacetylation of histone H3 enhanced both the basal and the inducible expression of hsp70 mRNA level. In addition, the acetylation level ofhistone H3 at the promoter exhibited a fluctuated change upon the time of heat shock. These experimental data implicated a causal link between histone acetylation and enhanced transcription initiation of hsp 70 gene in Drosophila. 展开更多
关键词 histone acetylation hsp 70 histone deacetylase inhibitor Drosophila melanogaster
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Synergy of DNA methylation and histone deacetylase inhibitors in the re-expression of RASSF1A and P16 genes silenced in QBC cells
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作者 Hong Li Shaoqin Chen Yi Shu Yongjun Chen, Ying Su Xin Wang Shengquan Zou 《The Chinese-German Journal of Clinical Oncology》 CAS 2008年第11期627-630,共4页
Objective: To investigate the effects of DNA methylation and histone deacetylase inhibitors in the re-expression of P16 and RASSIF1A of QBC939. Methods: The QBC939 cells were treated with hydralazine and valproate eit... Objective: To investigate the effects of DNA methylation and histone deacetylase inhibitors in the re-expression of P16 and RASSIF1A of QBC939. Methods: The QBC939 cells were treated with hydralazine and valproate either alone or combined, and the control group was added with RPIM-1640 culture medium. After 48 h, the expression of P16 and RASSF1A genes were evaluated by reverse transcription-PCR, Western blot, and the methylation status of the two genes were detected with MSP (methylation specific PCR). Results: Hydralazine and valproate could induce demethylation of the promoter region of the two genes, and could make them re-active. The expressions of P16 and RASSF1A of cells treated with both drugs were higher than that of the cells treated with either hydralazine or valproate (P < 0.01). There was no RASSF1A gene, and few P16 gene expressing in the control group. The demethylation effect could be found in the groups treated with hydralazine or both drugs, whereas no demethylation effect happened in the valproate group. Conclusion: The two drugs could synergistically re-express P16 and RASSF1A genes silenced in QBC939, and they exerted a great anti-tumour effect on QBC cells. 展开更多
关键词 DNA methyltransferase inhibitor histone deacetylase inhibitor DNA hypermethylation gene re-expression
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Novel hybrids from N-hydroxyarylamide and indole ring through click chemistry as histone deacetylase inhibitors with potent antitumor activities 被引量:1
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作者 Mao Cai Jie Hu +3 位作者 Ji-Lai Tian Huang Yan Chen-Guo Zheng Wan-Le Hu 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第6期675-680,共6页
Novel hybrid molecules 8a-8o were designed and synthesized by connecting indole ring with N- hydroxyarylamide through alkyl substituted triazole, and their in vitro biological activities were evaluated. It was discove... Novel hybrid molecules 8a-8o were designed and synthesized by connecting indole ring with N- hydroxyarylamide through alkyl substituted triazole, and their in vitro biological activities were evaluated. It was discovered that most of target compounds showed promising anticancer activities, particularly for 8n, which had a significant HDACs inhibitory and antiproliferative activities comparable to or slightly stronger than SAHA against human carcinoma cells. Furthermore, compound 8n exhibited much better selectivity for HDAC1 over HDAC6 and HDAC8 than SAHA. In addition, compound 8n also could dose-dependently induce cancer cell cycling arrest at G0/G1 phase and promote the expression of the acetylation for histone H3 and tubulin in vitro. Therefore, our novel findings may provide a new framework for the design of new selective HDAC inhibitor for the treatment of cancer. 展开更多
关键词 Synthesis Anti-tumor agents histone deacetylase inhibitors N-Hydroxyarylamides Click chemistry
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3D-QSAR Models of Anti-tumor Activity for Histone Deacetylase Inhibitors Containing Dihydropyridin-2-one 被引量:12
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作者 FENG Hui DU Xi-Hua +1 位作者 CHEN Yan FENG Chang-Jun 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2020年第5期855-860,共6页
A 3D-QSAR study was conducted to analyze the anti-tumor activity(pHs,s=1,6)of dihydropyridin-2-one containing histone deacetylase inhibitor(DHDACi)to histone deacetylase(HDACs,s=1,6)by the comparative molecular field ... A 3D-QSAR study was conducted to analyze the anti-tumor activity(pHs,s=1,6)of dihydropyridin-2-one containing histone deacetylase inhibitor(DHDACi)to histone deacetylase(HDACs,s=1,6)by the comparative molecular field analysis(CoMFA)method.The predicting model was established based on the training set of 22 compounds,which was verified by the test set of 6 compounds containing template molecule.The results showed that the contributions of steric and electrostatic fields to pH1 are 37.6%and 62.4%,and those to pH6 are 44.6%and 55.4%,respectively.The coefficients of the cross-validation(Rcv2)and the non cross-validation(R2)are 0.574 and 0.947 for pH1,and 0.488 and 0.884 for pH6,respectively.The models were then used to predict the activities of the compounds for the training and testing sets.The results indicated that the models had strong stability and good predictability.Based on the 3D contour maps,several new potential inhibitors with higher anti-tumor activity were designed.However,the effectiveness of these potential inhibitors is still needed to be verified by the experimental results. 展开更多
关键词 dihydropyridin-2-one histone deacetylase inhibitor anti-tumor activity 3D-QSAR comparative molecular field analysis
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Histone Deacetylase Inhibitors Romidepsin and Vorinostat Promote Hepatitis B Virus Replication by Inducing Cell Cycle Arrest 被引量:3
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作者 Yang Yang Yu Yan +5 位作者 Zhen Chen Jie Hu Kai Wang Ni Tang Xiaosong Li Zhi Zhou 《Journal of Clinical and Translational Hepatology》 SCIE 2021年第2期160-168,共9页
Background and Aims:Chronic hepatitis B virus(HBV)infection is a global public health challenge.HBV reactivation usually occurs in cancer patients after receiving cytotoxic chemotherapy or immunosuppressive therapies.... Background and Aims:Chronic hepatitis B virus(HBV)infection is a global public health challenge.HBV reactivation usually occurs in cancer patients after receiving cytotoxic chemotherapy or immunosuppressive therapies.Romidepsin(FK228)and vorinostat(SAHA)are histone deacetylase inhibitors(HDACi)approved by the Food and Drug Administration as novel antitumor agents.The aim of this study was to explore the effects and mechanisms of HDACi treatment on HBV replication.Methods:To assess these effects,human hepatoma cell lines were cultured and cell viability after FK228 or SAHA treatment was measured by the CCK-8 cell counting kit-8 assay.Then,HBV DNA and RNA were quantified by real-time PCR and Southern blotting.Furthermore,analysis by western blotting,enzyme-linked immunosorbent assay(ELISA),immunohistochemistry,and flow cytometry was performed.Results:FK228/SAHA treatment significantly promoted HBV replication and biosynthesis in both HBV-replicating cells and HBV-transgenic mouse model.Flow cytometry assay indicated that FK228/SAHA enhanced HBV replication by inducing cell cycle arrest through modulating the expression of cell cycle regulatory proteins.In addition,simultaneous inhibition of HDAC1/2 by FK228 promoted HBV replication more effectively than the broad spectrum HDAC inhibitor SAHA.Conclusions:Overall,our results demonstrate that cell cycle blockage plays an important role in FK228/SAHAenhanced HBV replication,thus providing a potential avenue for rational use of HDACi in patients with chronic hepatitis B. 展开更多
关键词 HBV reactivation histone deacetylase inhibitor ROMIDEPSIN VORINOSTAT Cell cycle
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Combined inhibitors of angiogenesis and histone deacetylase:Efficacy in rat hepatoma 被引量:1
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作者 Marion Ganslmayer Annette Zimmermann +1 位作者 Steffen Zopf Christoph Herold 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第31期3623-3629,共7页
AIM:To evaluate the antitumoral effect of combined inhibitors of angiogenesis and histone deacetylases in an experimental rat hepatoma model.METHODS:MH7777A hepatoma cells were injected into the liver of male Buffalo ... AIM:To evaluate the antitumoral effect of combined inhibitors of angiogenesis and histone deacetylases in an experimental rat hepatoma model.METHODS:MH7777A hepatoma cells were injected into the liver of male Buffalo rats.After 7 d treatment with the vascular endothelial growth factor receptor antagonist PTK787/ZK222584(PTK/ZK),the histone deacetylase inhibitor MS-275,tamoxifen(TAM) and/or retinoic acid was initiated(n ≥ 8 animals/group).Natural tumor development was shown in untreated control groups(control 1 with n = 12,control 2 with n = 8).The control groups were initiated at different time points to demonstrate the stability of the hepatoma model.For documentation of possible side effects,we documented any change in body weight,loss of fur and diarrhea.After 21 d treatment,the rats were euthanized.Main target parameters were tumor size and metastasis rate.Additionally,immunohistochemistry for the proliferating cell nuclear antigen(PCNA) and TdT-mediated dUTP-biotin nick end labeling(TUNEL) assay were performed.RESULTS:The control groups developed large tumor nodules with extrahepatic tumor burden in the lung and abdominal organs(control 1:6.18 cm3 ± 4.14 cm3 and control 2:8.0 cm3 ± 4.44 cm3 28 d after tumor cell injection).The tumor volume did not differ significantly in the control groups(P = 0.13).As single agents MS-275 and PTK/ZK reduced tumor volume by 58.6% ± 2.6% and 48.7% ± 3.2% vs control group 1,which was significant only for MS-275(P = 0.025).The combination of MS-275 and PTK/ZK induced a nearly complete and highly significant tumor shrinkage by 90.3% ± 1%(P = 0.005).Addition of TAM showed no further efficacy,while quadruple therapy with retinoic acid increased antitumoral efficacy(tumor reduction by 93 ± 1%) and side effects.PCNA positive cells were not significantly reduced by the single agents,while dual therapy(MS-275 and PTK/ZK) and quadruple therapy reduced the PCNA-positive cell fraction significantly by 9.1 and 20.6% vs control 1(P < 0.05).The number of TUNEL-positive cells,markers for ongoing apoptosis,was increased significantly by the single agents(control 1:6.9%,PTK/ZK:11.4%,MS-275:12.2% with P < 0.05 vs control 1).The fraction of TUNEL-positive cells was upregulated highly significantly by dual therapy(18.4%) and quadruple therapy(24.8%,P < 0.01 vs control 1).For the proliferating(PCNA positive) and apoptotic cell fraction,quadruple therapy was significantly superior to dual therapy(P = 0.01).CONCLUSION:Combined PTK/ZK and MS-275 were highly effective in this hepatoma model.Quadruple therapy enhanced the effects microscopically,but not macroscopically.These results should be investigated further. 展开更多
关键词 PTK787 ZK222584 MS-275 Hepatocellular carcinoma histone deacetylase inhibitor
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Progress in clinical trial of histone deacetylase(HDAC) inhibitors for non-small cell lung cancers
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作者 Xingsheng Hu Lin Wang +1 位作者 Lin Lin Yuankai Shi 《The Chinese-German Journal of Clinical Oncology》 CAS 2014年第4期185-188,共4页
Histone deacetylase(HDAC) inhibitors, which represent a structurally diverse group of molecules, have emerged as a novel therapeutic class of molecules with significant anticancer potential. Vorinostat and romidepsin,... Histone deacetylase(HDAC) inhibitors, which represent a structurally diverse group of molecules, have emerged as a novel therapeutic class of molecules with significant anticancer potential. Vorinostat and romidepsin, known as the first generation of HDAC inhibitors, were approved in the United States for the treatment of T-cell lymphomas. Preliminary activity of HDAC inhibitors has also been observed in non-small cell lung cancer(NSCLC) in combination with the existing treatment regimens, of which is the focus of the current review. 展开更多
关键词 histone deacetylase (HDAC) inhibitor non-small cell lung cancer (NSCLC) treatment PROGRESS
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Histone deacetylase inhibitor MS-275 alone or combined with bortezomib or sorafenib exhibits strong antiproliferative action in human cholangiocarcinoma cells 被引量:10
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作者 Viola Baradari Michael Hpfner +2 位作者 Alexander Huether Detlef Schuppan Hans Scherübl 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第33期4458-4466,共9页
AIM: To investigate the antiproliferative effect of the histone deacetylase (HDAC) inhibitor MS-275 on cholangiocarcinoma cells alone and in combination with conventional cytostatic drugs (gemcitabine or doxorubicin) ... AIM: To investigate the antiproliferative effect of the histone deacetylase (HDAC) inhibitor MS-275 on cholangiocarcinoma cells alone and in combination with conventional cytostatic drugs (gemcitabine or doxorubicin) or the novel anticancer agents sorafenib or bortezomib. METHODS: Two human bile duct adenocarcinoma cell lines (EGI-1 and TFK-1) were studied. Crystal violet staining was used for detection of cell number changes. Cytotoxicity was determined by measuring the release of the cytoplasmic enzyme lactate dehydrogenase (LDH). Apoptosis was determined by measuring the enzyme activity of caspase-3. Cell cycle status reflected by the DNA content was detected by flow cytometry.RESULTS: MS-275 treatment potently inhibited the proliferation of EGI-1 and TFK-1 cholangiocarcinoma cells by inducing apoptosis and cell cycle arrest. MS-275-induced apoptosis was characterized by activation of caspase-3, up-regulation of Bax and down-regulation of Bcl-2. Cell cycle was predominantly arrested at the G1/S checkpoint, which was associated with induction of the cyclin-dependent kinase inhibitor p21Waf/CIP1. Furthermore, additive anti-neoplastic effects were observed when MS-275 treatment was combined with gemcitabine or doxorubicin, while combination with the multi-kinase inhibitor sorafenib or the proteasome inhibitor bortezomib resulted in overadditive anti-neoplastic effects.CONCLUSION: The growth of human cholangiocarcinoma cells can be potently inhibited by MS-275 alone or in combination with conventional cytostatic drugs or new, targeted anticancer agents. 展开更多
关键词 Apoptosis CHOLANGIOCARCINOMA BORTEZOMIB Combination treatment histone deacetylase inhibitor MS-275 Proteasome inhibitor SORAFENIB
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Inhibition of histone deacetylase for the treatment of biliary tract cancer:A new effective pharmacological approach 被引量:5
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作者 Thilo Bluethner Manuel Niederhagen +5 位作者 Karel Caca Frederik Serr Helmut Witzigmann Christian Moebius Joachim Mossner Marcus Wiedmann 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第35期4761-4770,共10页
AIM: To investigate in vitro and in vivo therapeutic effects of histone deacetylase inhibitors NVP-LAQ824 and NVP-LBH589 on biliary tract cancer. METHODS: Cell growth inhibition by NVP-LAQ824 and NVP-LBH589 was stud... AIM: To investigate in vitro and in vivo therapeutic effects of histone deacetylase inhibitors NVP-LAQ824 and NVP-LBH589 on 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 antitumoral effect of NVP-LBH589 was studied in a chimeric mouse model. Anti-tumoral drug mechanism was assessed by immunoblotting for acH4 and p21^WAFl/CIP-1, PARP assay, cell cycle analysis, 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 (3 d) 0.11 and 0.05 μmol/L, respectively], and was associated with hyperacetylation of nucleosomal histone H4, increased expression of p21^WAF-1/CIP-1, induction of apoptosis (PARP cleavage), and cell cycle arrest at G2/M checkpoint. After 28 d, NVP- LBH589 significantly 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 by TUNEL assay and reduced cell proliferation (MIB-1). CONCLUSION: Our findings suggest that NVP-LBH589 and 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. 展开更多
关键词 histone deacetylase inhibitor Biliary tract cancer CHOLANGIOCARCINOMA NVP-LAQ824 NVP-LBH589
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Histone deacetylase inhibitor pre-treatment enhances the efficacy of DNA-interacting chemotherapeutic drugs in gastric cancer 被引量:4
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作者 Ramchandra Vigay Amnekar Shafqat Ali Khan +7 位作者 Mudasir Rashid Bharat Khade Rahul Thorat Poonam Gera Shailesh V Shrikhande Duane T Smoot Hassan Ashktorab Sanjay Gupta 《World Journal of Gastroenterology》 SCIE CAS 2020年第6期598-613,共16页
BACKGROUND The prognosis of gastric cancer continues to remain poor,and epigenetic drugs like histone deacetylase inhibitors(HDACi)have been envisaged as potential therapeutic agents.Nevertheless,clinical trials are f... BACKGROUND The prognosis of gastric cancer continues to remain poor,and epigenetic drugs like histone deacetylase inhibitors(HDACi)have been envisaged as potential therapeutic agents.Nevertheless,clinical trials are facing issues with toxicity and efficacy against solid tumors,which may be partly due to the lack of patient stratification for effective treatments.To study the need of patient stratification before HDACi treatment,and the efficacy of pre-treatment of HDACi as a chemotherapeutic drug sensitizer.METHODS The expression activity of class 1 HDACs and histone acetylation was examined in human gastric cancer cells and tissues.The potential combinatorial regime of HDACi and chemotherapy drugs was defined on the basis of observed drug binding assays,chromatin remodeling and cell death.RESULTS In the present study,the data suggest that the differential increase in HDAC activity and the expression of class 1 HDACs are associated with hypoacetylation of histone proteins in tumors compared to normal adjacent mucosa tissue samples of gastric cancer.The data highlights for the first time that pretreatment of HDACi results in an increased amount of DNA-bound drugs associated with enhanced histone acetylation,chromatin relaxation and cell cycle arrest.Fraction-affected plots and combination index-based analysis show that pre-HDACi chemo drug combinatorial regimes,including valproic acid with cisplatin or oxaliplatin and trichostatin A with epirubicin,exhibit synergism with maximum cytotoxic potential due to higher cell death at low combined doses in gastric cancer cell lines.CONCLUSION Expression or activity of class 1 HDACs among gastric cancer patients present an effective approach for patient stratification.Furthermore,HDACi therapy in pretreatment regimes is more effective with chemotherapy drugs,and may aid in predicting individual patient prognosis. 展开更多
关键词 Chemotherapy Combinatorial index Gastric cancer histone acetylation histone deacetylase inhibitor Patient stratification
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Targeting pancreatic cancer immune evasion by inhibiting histone deacetylases 被引量:1
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作者 Wynne Sim Wei-Meng Lim +2 位作者 Ling-Wei Hii Chee-Onn Leong Chun-Wai Mai 《World Journal of Gastroenterology》 SCIE CAS 2022年第18期1934-1945,共12页
The immune system plays a vital role in maintaining the delicate balance between immune recognition and tumor development.Regardless,it is not uncommon that cancerous cells can intelligently acquire abilities to bypas... The immune system plays a vital role in maintaining the delicate balance between immune recognition and tumor development.Regardless,it is not uncommon that cancerous cells can intelligently acquire abilities to bypass the antitumor immune responses,thus allowing continuous tumor growth and development.Immune evasion has emerged as a significant factor contributing to the progression and immune resistance of pancreatic cancer.Compared with other cancers,pancreatic cancer has a tumor microenvironment that can resist most treatment modalities,including emerging immunotherapy.Sadly,the use of immunotherapy has yet to bring significant clinical breakthrough among pancreatic cancer patients,suggesting that pancreatic cancer has successfully evaded immunomodulation.In this review,we summarize the impact of genetic alteration and epigenetic modification(especially histone deacetylases,HDAC)on immune evasion in pancreatic cancer.HDAC overexpression significantly suppresses tumor suppressor genes,contributing to tumor growth and progression.We review the evidence on HDAC inhibitors in tumor eradication,improving T cells activation,restoring tumor immunogenicity,and modulating programmed death 1 interaction.We provide our perspective in targeting HDAC as a strategy to reverse immune evasion in pancreatic cancer. 展开更多
关键词 histone acetylation histone deacetylases inhibitors Immune evasion Pancreatic cancers Pancreatic ductal adenocarcinoma
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Peanut testa extracts enhance anticancer effect of cisplatin against human cholangiocarcinoma cells via modulation of histone deacetylase inhibitory activity
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作者 Somprasong Saenglee Gulsiri Senawong +4 位作者 Jarckrit Jeeunngoi Sanun Jogloy Albert JKetterman Banchob Sripa Thanaset Senawong 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2020年第8期369-378,共10页
Objective:To investigate the effect of combination treatments of cisplatin and KK4 and ICG15042 peanut testa extracts against cholangiocarcinoma cells in vitro.Methods:The growth inhibition,cell cycle arrest and apopt... Objective:To investigate the effect of combination treatments of cisplatin and KK4 and ICG15042 peanut testa extracts against cholangiocarcinoma cells in vitro.Methods:The growth inhibition,cell cycle arrest and apoptosis of cholangiocarcinoma cells were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and flow cytometry analysis,respectively.The levels of proteins involved in apoptosis were assessed using Western blotting assays.The caspase activity was assessed using a colorimetric caspase activity assay.Results:Cisplatin and peanut(KK4 and ICG15042)testa extracts inhibited the growth of cholangiocarcinoma cell lines(KKUM214 and KKU-100 cells)in a dose-and time-dependent manner.The combination treatments reduced cell viability and induced apoptosis of cholangiocarcinoma cells more efficiently than singledrug treatments.Cancer cell death synergistically mediated by cisplatin and peanut testa extracts was observed in KKU-M214 cells(combination index<1.0)but not in KKU-100 cells(combination index>1.0).The combination treatments also increased the subG1 population and caused KKU-M214 cell cycle arrest at S and G2/M phases,which were the combined effects of cisplatin(S phase arrest)and peanut testa extracts(G2/M phase arrest).In addition,p ERK1/2,Ac-H3,Bcl-2 and proteins related to apoptosis,including Bax and caspases 3,8,9,exhibited enhanced expression in KKUM214 cells.The combination treatments caused down-regulation of p53,whereas the expression of p21 was fairly constant when compared with cisplatin single drug treatment.Conclusions:Peanut testa extracts in combination with cisplatin synergistically reduce cell viability and induce apoptosis through stimulation of caspases 3,8 and 9 in KKU-M214 cells. 展开更多
关键词 Apoptosis CASPASES CHOLANGIOCARCINOMA CISPLATIN Natural histone deacetylase inhibitor Peanut testa extracts
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Inhibitory Effect of Histone Deacetylase Inhibitor on the Proliferation of Leukemia Cells and Its Anti-Tumor Pharmacology
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作者 Shubo Wang 《Journal of Biosciences and Medicines》 2021年第1期30-40,共11页
The aim of this study was to explore the inhibitory effect of histone deacetylase inhibitor (HDACI) on the proliferation of leukemia cells. The two kinds of leukemia cells (human promyelocytic leukemia cell (HL-60) an... The aim of this study was to explore the inhibitory effect of histone deacetylase inhibitor (HDACI) on the proliferation of leukemia cells. The two kinds of leukemia cells (human promyelocytic leukemia cell (HL-60) and human acute myelogenous leukemia cell (KG-1)) were selected for in vitro research. Besides, Chidamide, a kind of benzamide HDACI, was applied to induce and culture the HL-60 and KG-1 cells, and the anti-tumor cell proliferation activity of Chidamide on HL-60 and KG-1 was detected by the methyl thiazolyl tetrazolium (MTT) assay, which was 5.6 and 6.1 in turn. The cell scratch experiment verified that Chidamide had the metastasis inhibitory effect on HL-60 and KG-1 cells. Flow cytometry was employed to measure the percentage of apoptotic cells, and it was found that the percentage of apoptotic cells was 55.6% ± 1% and 48.6% ± 1% in sequence after HL-60 and KG-1 cells were treated with Chidamide for 36 hours. The number of auto-phagosomes was determined by transmission electron microscopy showing that the number of auto-phagosomes in HL-60 and KG-1 cells was 12 ± 1 and 10 ± 1, respectively after the induction process of Chidamide. The phosphorylated histone H2AX protein (γ-H2AX) recognition antibody immunofluorescence method was adopted to determine the deoxyribonucleic acid (DNA) damage, and the positive rates of HL-60 and KG-1 cells reached 28.41% and 26.35%, respectively after Chidamide treatment. Therefore, Chidamide, as a kind of HDACI, could effectively inhibit the proliferation of leukemia cells, so that the results of this experiment had a good guiding meaning for the clinical diagnosis and treatment of leukemia. 展开更多
关键词 Tumor Cell Proliferation histone deacetylase Inhibitor CHIDAMIDE Leukemia Treatment
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HDACs,histone deacetylation and gene transcription: from molecular biology to cancer therapeutics 被引量:36
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作者 PaolaGallinari StefaniaDiMarco +2 位作者 PhillipJones MichelePallaoro ChristianSteinkühler 《Cell Research》 SCIE CAS CSCD 2007年第3期195-211,共17页
Histone deacetylases (HDACs) and histone acetyl transferases (HATs) are two counteracting enzyme families whose enzymatic activity controls the acetylation state of protein lysine residues, notably those contained... Histone deacetylases (HDACs) and histone acetyl transferases (HATs) are two counteracting enzyme families whose enzymatic activity controls the acetylation state of protein lysine residues, notably those contained in the N-terminal extensions of the core histones. Acetylation of histones affects gene expression through its influence on chromatin conformation. In addition, several non-histone proteins are regulated in their stability or biological function by the acetylation state of specific lysine residues. HDACs intervene in a multitude of biological processes and are part of a multiprotein family in which each member has its specialized functions. In addition, HDAC activity is tightly controlled through targeted recruitment, protein-protein interactions and post-translational modifications. Control of cell cycle progression, cell survival and differentiation are among the most important roles of these enzymes. Since these processes are affected by malignant transformation, HDAC inhibitors were developed as antineoplastic drugs and are showing encouraging efficacy in cancer patients. 展开更多
关键词 histone deacetylase histone post-translational modification TRANSCRIPTION histone deacetylase inhibitors protein acetylation
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Inhibition of autophagy significantly enhances combination therapy with sorafenib and HDAC inhibitors for human hepatoma cells 被引量:15
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作者 Hang Yuan Ai-Jun Li +4 位作者 Sen-Lin Ma Long-Jiu Cui Bin Wu Lei Yin Meng-Chao Wu 《World Journal of Gastroenterology》 SCIE CAS 2014年第17期4953-4962,共10页
AIM: To clarify whether histone deacetylase inhibitors histone deacetylase inhibitors (HDACIs) can sensitize hepatocellular carcinoma (HCC) cells to sorafenib treatment. METHODS: Bax, Bcl-2, ATG5-ATG12, p21, and p27 p... AIM: To clarify whether histone deacetylase inhibitors histone deacetylase inhibitors (HDACIs) can sensitize hepatocellular carcinoma (HCC) cells to sorafenib treatment. METHODS: Bax, Bcl-2, ATG5-ATG12, p21, and p27 protein levels in Hep3B, HepG2, and PLC/PRF/5 cells were examined by Western blot. CCK8 and a fluoro-metric caspase-3 assay were used to examine cellular viability and apoptosis levels. The effect of Beclin-1 on sensitization of HCC cells to sorafenib was examined by transfecting Beclin-1 siRNA into Hep3B, HepG2, and PLC/PRF/5 cells. RESULTS: Autophagy inhibition enhances the inhibitory effects of vorinostat and sorafenib alone or in combination on HCC cell growth. Vorinostat and sorafenib synergistically induced apoptosis and cell cycle alterations. Western blot data indicated that HDACIs and Beclin- 1 knockdown increased the p53 acetylation level. The knockdown of Beclin-1 enhanced the synergistic effect of the combination of vorinostat with sorafenib. CONCLUSION: HDACIs can sensitize HCC cells to sorafenib treatment by regulating the acetylation level of Beclin-1. (C) 2014 Baishideng Publishing Group Co., Limited. All rights reserved. 展开更多
关键词 Hepatocellular carcinoma histone deacetylase inhibitors AUTOPHAGY SORAFENIB CHEMORESISTANCE
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Histone modifications:Targeting head and neck cancer stem cells 被引量:6
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作者 John M Le Cristiane H Squarize Rogerio M Castilho 《World Journal of Stem Cells》 SCIE CAS 2014年第5期511-525,共15页
Head and neck squamous cell carcinoma(HNSCC) is the sixth most common cancer worldwide, and is responsible for a quarter of a million deaths annually. The survival rate for HNSCC patients is poor, showing only minor i... Head and neck squamous cell carcinoma(HNSCC) is the sixth most common cancer worldwide, and is responsible for a quarter of a million deaths annually. The survival rate for HNSCC patients is poor, showing only minor improvement in the last three decades. Despite new surgical techniques and chemotherapy protocols, tumor resistance to chemotherapy remains a significant challenge for HNSCC patients. Numerous mechanisms underlie chemoresistance, including genetic and epigenetic alterations in cancer cells that may be acquired during treatment and activation of mitogenic signaling pathways, such as nuclear factor kappa-light-chain-enhancer-of activated B cell, that cause reduced apoptosis. In addition to dysfunctional molecular signaling, emerging evidence reveals involvement of cancer stem cells(CSCs) in tumor development and in tumor resistance to chemotherapy and radiotherapy. These observations have sparked interest in understanding the mechanisms involved in the control of CSC function and fate. Post-translational modifications of histones dynamically influence gene expression independent of alterations to the DNA sequence. Recent findings from our group have shown that pharmacological induction of posttranslational modifications of tumor histones dynamically modulates CSC plasticity. These findings suggest that a better understanding of the biology of CSCs in response to epigenetic switches and pharmacological inhibitors of histone function may directly translate to the development of a mechanism-based strategy to disrupt CSCs. In this review, we present and discuss current knowledge on epigenetic modifications of HNSCC and CSC response to DNA methylation and histone modifications. In addition, we discuss chromatin modifications and their role in tumor resistance to therapy. 展开更多
关键词 Head and neck squamous cell carcinoma Chromatin remodeling histone deacetylases inhibitor histone acetylation Cancer-initiating cell Epigenetic target Epigenetic marker Oral squamous cell carcinoma Tumor resistance
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Synthesis,Biological Evaluation and Molecular Modeling of Cyclic Tetrapeptide Based Inhibitors HDAC
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作者 LI Xiao-hui WEI Ying-dong WANG Shi-miao WANG Meng-nan HUANG Da-wei XIU Zhi-long 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第6期1011-1016,共6页
Histone deacetylases(HDACs) are considered to be among the most promising targets for the development of anti-cancer drugs,and HDAC inhibitors(HDACIs) have become a promising class of anti-cancer drugs.To explore ... Histone deacetylases(HDACs) are considered to be among the most promising targets for the development of anti-cancer drugs,and HDAC inhibitors(HDACIs) have become a promising class of anti-cancer drugs.To explore whether thioacetyl group as the zinc binding group(ZBG) and a slight change in the hydrophobicity of the recognition domain of HDACIs could alter their activities,we synthesized a series of cyclo[-L-Am7(SAc)-Aib-L-Phe(n-Cl)D-Pro-] and evaluated their HDAC-inhibitory and antiproliferative activities.The results show that these peptides could inhibit HDAC at 10-9 mol/L level,and could selectively inhibit the proliferation of three human cancer cell lines with IC 50 at 10-6 mol/L level.Docking study was conducted to examine the mechanisms by which these peptides interact with HDAC2.It appeared that a zinc ion in the active site of HDAC was coordinated by the carbonyl oxygen atom of the ZBG in the inhibitor.Both the ZBG domain of all the peptides and the surface recognition domain of cyclo[-L-Am7(SAc)-Aib-L-Phe(o-Cl)-D-Pro-] and that of cyclo[-L-Am7(SAc)-Aib-L-Phe(m-Cl)-D-Pro-] interacted with HDAC2 via hydrogen bonding.Hydrophobic interaction has been considered to provide favorable contributions to stabilizing the complexes,and the introduction of a chlorine atom at the aromatic ring on the L-Phe position of these peptides affected the interaction between each of these inhibitors and the enzyme,resulting in slight change in the structure of the surface recognition domain of the peptides. 展开更多
关键词 histone deacetylase(HDAC) histone deacetylase inhibitor(HDACI) Cyclic tetrapeptide Anti-cancer agent Antiproliferative activity DOCKING
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