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Hoffmann A, Steffens U, Maček B, Franz-Wachtel M, Nieselt K, Harbig TA, Scherlach K, Hertweck C, Sahl HG, Bierbaum G. The unusual mode of action of the polyketide glycoside antibiotic cervimycin C. mSphere 2024; 9:e0076423. [PMID: 38722162 DOI: 10.1128/msphere.00764-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 03/28/2024] [Indexed: 05/30/2024] Open
Abstract
Cervimycins A-D are bis-glycosylated polyketide antibiotics produced by Streptomyces tendae HKI 0179 with bactericidal activity against Gram-positive bacteria. In this study, cervimycin C (CmC) treatment caused a spaghetti-like phenotype in Bacillus subtilis 168, with elongated curved cells, which stayed joined after cell division, and exhibited a chromosome segregation defect, resulting in ghost cells without DNA. Electron microscopy of CmC-treated Staphylococcus aureus (3 × MIC) revealed swollen cells, misshapen septa, cell wall thickening, and a rough cell wall surface. Incorporation tests in B. subtilis indicated an effect on DNA biosynthesis at high cervimycin concentrations. Indeed, artificial downregulation of the DNA gyrase subunit B gene (gyrB) increased the activity of cervimycin in agar diffusion tests, and, in high concentrations (starting at 62.5 × MIC), the antibiotic inhibited S. aureus DNA gyrase supercoiling activity in vitro. To obtain a more global view on the mode of action of CmC, transcriptomics and proteomics of cervimycin treated versus untreated S. aureus cells were performed. Interestingly, 3 × MIC of cervimycin did not induce characteristic responses, which would indicate disturbance of the DNA gyrase activity in vivo. Instead, cervimycin induced the expression of the CtsR/HrcA heat shock operon and the expression of autolysins, exhibiting similarity to the ribosome-targeting antibiotic gentamicin. In summary, we identified the DNA gyrase as a target, but at low concentrations, electron microscopy and omics data revealed a more complex mode of action of cervimycin, which comprised induction of the heat shock response, indicating protein stress in the cell.IMPORTANCEAntibiotic resistance of Gram-positive bacteria is an emerging problem in modern medicine, and new antibiotics with novel modes of action are urgently needed. Secondary metabolites from Streptomyces species are an important source of antibiotics, like the cervimycin complex produced by Streptomyces tendae HKI 0179. The phenotypic response of Bacillus subtilis and Staphylococcus aureus toward cervimycin C indicated a chromosome segregation and septum formation defect. This effect was at first attributed to an interaction between cervimycin C and the DNA gyrase. However, omics data of cervimycin treated versus untreated S. aureus cells indicated a different mode of action, because the stress response did not include the SOS response but resembled the response toward antibiotics that induce mistranslation or premature chain termination and cause protein stress. In summary, these results point toward a possibly novel mechanism that generates protein stress in the cells and subsequently leads to defects in cell and chromosome segregation.
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Affiliation(s)
- Alina Hoffmann
- University Hospital Bonn, Institute of Medical Microbiology, Immunology and Parasitology, Bonn, Germany
| | - Ursula Steffens
- University Hospital Bonn, Institute of Medical Microbiology, Immunology and Parasitology, Bonn, Germany
| | - Boris Maček
- University of Tübingen, Proteome Center Tübingen, Tübingen, Germany
| | | | - Kay Nieselt
- University of Tübingen, Interfaculty Institute for Bioinformatics and Medical Informatics, Tübingen, Germany
| | - Theresa Anisja Harbig
- University of Tübingen, Interfaculty Institute for Bioinformatics and Medical Informatics, Tübingen, Germany
| | - Kirstin Scherlach
- Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Jena, Germany
| | - Christian Hertweck
- Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Jena, Germany
- Friedrich Schiller University Jena, Institute of Microbiology, Faculty of Biological Sciences, Jena, Germany
| | - Hans-Georg Sahl
- University of Bonn, Institute for Pharmaceutical Microbiology, Bonn, Germany
| | - Gabriele Bierbaum
- University Hospital Bonn, Institute of Medical Microbiology, Immunology and Parasitology, Bonn, Germany
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Kanagasabai T, Hawaz M, Ellis K, Fah O, Mikhaeil H, Nguyen P, Tombo N, Shanker A, Sampath C, Khoury ZH, Cade J, Ferguson A, Gangula P. Effects of Topoisomerase II alpha Inhibition on Oral Cancer Cell Metabolism and Cancer Stem Cell Function. DENTAL RESEARCH AND ORAL HEALTH 2024; 7:58-65. [PMID: 38957610 PMCID: PMC11218736 DOI: 10.26502/droh.0076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Background Topoisomerase IIα (TOP2A), is an enzyme involved in DNA replication, transcription, recombination, and chromatin remodeling and is found in a variety of cancers. However, the role of TOP2A regulation in oral cancer progression is not fully explained. We investigated the effect of TOP2A inhibition on cell survival, metabolism, and cancer stem cell self-renewal function in oral cancer cells. Methods Oral carcinoma cell line SCC25 was cultured in complete DMEM/F12 media and treated with 5μM of Etoposide (Topoisomerase II inhibitor) for 48h. The critical parameters of cellular metabolism, including extracellular acidification rate (ECAR) and mitochondrial oxidative phosphorylation based on the oxygen consumption rate of cancer cells were assessed using Seahorse assay. Western blotting was performed to assess the proteins that are associated with proliferation (Survivin, IL-6) and cancer stem cell function (Oct4, Sox2) in cell lysates prepared from control and etoposide treated groups. Statistical analysis was performed using One-way ANOVA with Dunnett's multiple comparisons test. Results The protein expression of TOP2A was significantly (P<0.05) inhibited by etoposide. Additionally, TOP2A inhibition decreased the mitochondrial respiratory parameters including basal respiration, maximal respiration and ATP production. However, TOP2A inhibition has no impact on glycolytic function. Moreover, the proliferative marker survivin and IL-6 showed a significant (P<0.05) decrease after TOP2A inhibition. Conversely, the protein expression of cancer stem cell markers Oct-4 and Sox 2 were not altered. Conclusion These results indicate that inhibition of TOP2A is more efficacious by decreasing the mitochondrial metabolic reprogramming and thereby downregulating the key anti-apoptotic and pro-survival mediators. Thus, TOP2A represents an ideal therapeutic target and offers a potential treatment strategy for OSCC.
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Affiliation(s)
- Thanigaivelan Kanagasabai
- Department of Biomedical Sciences, School of Graduate Studies, Meharry Medical College, Nashville, TN 37208, USA
| | - Mariam Hawaz
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Kayla Ellis
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Orlyne Fah
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Helana Mikhaeil
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Philip Nguyen
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Nathalie Tombo
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Anil Shanker
- Department of Biomedical Sciences, School of Graduate Studies, Meharry Medical College, Nashville, TN 37208, USA
- Department of Biochemistry, Cancer Biology, Neuroscience and Pharmacology, School of Medicine, Meharry Medical College, Nashville, TN 37208, USA
| | - Chethan Sampath
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Zaid H Khoury
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - James Cade
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Alexys Ferguson
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
| | - Pandu Gangula
- Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, TN, 37208, USA
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Kuang W, Zhao Y, Li J, Deng Z. Structure-function analysis of the ATPase domain of African swine fever virus topoisomerase. mBio 2024; 15:e0308623. [PMID: 38411066 PMCID: PMC11005426 DOI: 10.1128/mbio.03086-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 02/05/2024] [Indexed: 02/28/2024] Open
Abstract
Type II topoisomerase utilizes the energy from ATP hydrolysis to alter DNA topology during genome replication and transcription. The ATPase domain of this enzyme is required for ATP hydrolysis and plays a crucial role in coupling DNA binding and ATP turnover with the DNA strand passage reaction. The African swine fever virus (ASFV) specifically encodes a topoisomerase II (topo II), which is critical for viral replication and an attractive target for antiviral development. Here, we present a high-resolution crystal structure of the ASFV topo II ATPase domain complexed with the substrate analog AMPPNP. Structural comparison reveals that the ASFV topo II ATPase domain shares a conserved overall structure with its homologs from eukaryotes and prokaryotes but also has three characteristic regions, including the intra-molecular interface formed by the ATP-lid and QTK loop as well as helix α9, the K-loop in the transducer domain, and the antennae-like α-helix at the ATP binding domain. Mutating the key residues within these three regions impairs or abolishes the basal and DNA-stimulated ATPase activities and reduces or eliminates the relaxation activity of the holoenzyme. Our data indicate that all three regions are functionally important for the ATPase and relaxation activities and strongly suggest that ATP hydrolysis, DNA binding, and strand passage are highly coupled and managed by the allosteric coordination of multiple domains of the type II topoisomerase. Moreover, we find a promising druggable pocket in the dimeric interface of the ASFV topo II ATPase domain, which will benefit future anti-ASFV drug development. IMPORTANCE The ATPase domain of type II topoisomerase provides energy by hydrolyzing ATP and coordinates with the DNA-binding/cleavage domain to drive and control DNA transport. The precise molecular mechanisms of how these domains respond to DNA binding and ATP hydrolysis signals and communicate with each other remain elusive. We determine the first high-resolution crystal structure of the ATPase domain of African swine fever virus (ASFV) topo II in complex with AMPPNP and biochemically investigate its function in ATPase and DNA relaxation activities. Importantly, we find that mutations at three characteristic regions of the ASFV ATPase domain produce parallel effects on the basal/DNA-stimulated ATPase and relaxation activities, implying the tight coupling of the ATP hydrolysis and strand passage process. Therefore, our data provide important implications for understanding the strand passage mechanism of the type II topoisomerase and the structural basis for developing ATPase domain-targeting antivirals against ASFV.
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Affiliation(s)
- Wenhua Kuang
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Antiviral Research, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Yan Zhao
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Antiviral Research, Chinese Academy of Sciences, Wuhan, Hubei, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jinyue Li
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Antiviral Research, Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Zengqin Deng
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Antiviral Research, Chinese Academy of Sciences, Wuhan, Hubei, China
- Hubei Jiangxia Laboratory, Wuhan, Hubei, China
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Sun J, Ruiz Daniels R, Balic A, Andresen AMS, Bjørgen H, Dobie R, Henderson NC, Koppang EO, Martin SAM, Fosse JH, Taylor RS, Macqueen DJ. Cell atlas of the Atlantic salmon spleen reveals immune cell heterogeneity and cell-specific responses to bacterial infection. FISH & SHELLFISH IMMUNOLOGY 2024; 145:109358. [PMID: 38176627 DOI: 10.1016/j.fsi.2024.109358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/23/2023] [Accepted: 01/02/2024] [Indexed: 01/06/2024]
Abstract
The spleen is a conserved secondary lymphoid organ that emerged in parallel to adaptive immunity in early jawed vertebrates. Recent studies have applied single cell transcriptomics to reveal the cellular composition of spleen in several species, cataloguing diverse immune cell types and subpopulations. In this study, 51,119 spleen nuclei transcriptomes were comprehensively investigated in the commercially important teleost Atlantic salmon (Salmo salar L.), contrasting control animals with those challenged with the bacterial pathogen Aeromonas salmonicida. We identified clusters of nuclei representing the expected major cell types, namely T cells, B cells, natural killer-like cells, granulocytes, mononuclear phagocytes, endothelial cells, mesenchymal cells, erythrocytes and thrombocytes. We discovered heterogeneity within several immune lineages, providing evidence for resident macrophages and melanomacrophages, infiltrating monocytes, several candidate dendritic cell subpopulations, and B cells at distinct stages of differentiation, including plasma cells and an igt + subset. We provide evidence for twelve candidate T cell subsets, including cd4+ T helper and regulatory T cells, one cd8+ subset, three γδT subsets, and populations double negative for cd4 and cd8. The number of genes showing differential expression during the early stages of Aeromonas infection was highly variable across immune cell types, with the largest changes observed in macrophages and infiltrating monocytes, followed by resting mature B cells. Our analysis provides evidence for a local inflammatory response to infection alongside B cell maturation in the spleen, and upregulation of ccr9 genes in igt + B cells, T helper and cd8+ cells, and monocytes, consistent with the recruitment of immune cell populations to the gut to deal with Aeromonas infection. Overall, this study provides a new cell-resolved perspective of the immune actions of Atlantic salmon spleen, highlighting extensive heterogeneity hidden to bulk transcriptomics. We further provide a large catalogue of cell-specific marker genes that can be leveraged to further explore the function and structural organization of the salmonid immune system.
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Affiliation(s)
- Jianxuan Sun
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, UK
| | - Rose Ruiz Daniels
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, UK
| | - Adam Balic
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, UK; Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, Australia
| | | | - Håvard Bjørgen
- Unit of Anatomy, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Ås, Norway
| | - Ross Dobie
- Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, University of Edinburgh, Edinburgh, UK
| | - Neil C Henderson
- Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, University of Edinburgh, Edinburgh, UK; MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - Erling Olaf Koppang
- Unit of Anatomy, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Ås, Norway
| | - Samuel A M Martin
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | | | - Richard S Taylor
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, UK
| | - Daniel J Macqueen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, UK.
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Nettles SA, Ikeuchi Y, Lefton KB, Abbasi L, Erickson A, Agwu C, Papouin T, Bonni A, Gabel HW. MeCP2 represses the activity of topoisomerase IIβ in long neuronal genes. Cell Rep 2023; 42:113538. [PMID: 38096051 PMCID: PMC10844882 DOI: 10.1016/j.celrep.2023.113538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/31/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023] Open
Abstract
A unique signature of neurons is the high expression of the longest genes in the genome. These genes have essential neuronal functions, and disruption of their expression has been implicated in neurological disorders. DNA topoisomerases resolve DNA topological constraints and facilitate neuronal long gene expression. Conversely, the Rett syndrome protein, methyl-CpG-binding protein 2 (MeCP2), can transcriptionally repress long genes. How these factors regulate long genes is not well understood, and whether they interact is not known. Here, we identify and map a functional interaction between MeCP2 and topoisomerase IIβ (TOP2β) in mouse neurons. We profile neuronal TOP2β activity genome wide, detecting enrichment at regulatory regions and gene bodies of long genes, including MeCP2-regulated genes. We show that loss and overexpression of MeCP2 alter TOP2β activity at MeCP2-regulated genes. These findings uncover a mechanism of TOP2β inhibition by MeCP2 in neurons and implicate TOP2β dysregulation in disorders caused by MeCP2 disruption.
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Affiliation(s)
- Sabin A Nettles
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Yoshiho Ikeuchi
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Katheryn B Lefton
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Ladan Abbasi
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Alyssa Erickson
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Chibueze Agwu
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Thomas Papouin
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Azad Bonni
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Harrison W Gabel
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Gogoi U, Gogoi N, Rajkhowa S, Khan SA, Daffa Alla Omer Hajedris N, Al-Hoshani N, Al-Shouli ST, Das A. Expanding the therapeutic arsenal against cancer: a computational investigation of hybrid xanthone derivatives as selective Topoisomerase 2α ATPase inhibitors. J Biomol Struct Dyn 2023:1-30. [PMID: 37975405 DOI: 10.1080/07391102.2023.2280723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
The DNA topoisomerase II (topo II) enzyme plays an important role in the replication, recombination, and repair of DNA. Despite their widespread applications in cancer therapy, new, selective, and potent topo II inhibitors with better pharmaceutical profiles are needed to handle drug resistance and severe adverse effects. In this respect, an array of 36 new anticancer compounds was designed based on a Xanthone core tethered to multifunctional Pyridine-amines and Imidazole scaffold via alkyl chain linkers. An integrated in silico approach was used to understand the structural basis and mechanism of inhibition of the hybrid xanthone derivatives. In this study, we established an initial virtual screening workflow based on pharmacophore mapping, docking, and cancer target association to validate the target selection process. Next, a simulation-based docking was conducted along with pharmacokinetic analysis to filter out the five best compounds (7, 10, 25, 27, and 30) having binding energies within the range of -60.45 to -40.97 kcal/mol. The screened compounds were further subjected to molecular dynamics simulation for 200 ns followed by MM-GBSA and ligand properties analysis to assess the stability and binding affinity to hTOP2α. The top-ranking hits 3,7-bis(3-(2-aminopyridin-3-ylhydroxy)propoxy)-1-hydroxy-9H-xanthen-9-one (ligand 7) and 3,8-bis(3-(2-aminopyridin-3-ylhydroxy)propoxy)-1-hydroxy-9H-xanthen-9-one (ligand 25) were found to have no toxicity, optimum pharmacokinetic and, DFT properties and stable intermolecular interactions with the active site of hTopo IIα protein. In conclusion, further in vitro and in vivo experimental validation of the identified lead molecules is warranted for the discovery of new human Topoisomerase 2 alpha inhibitors.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Urvashee Gogoi
- Department of Pharmaceutical Sciences, Faculty of Science & Engineering, Dibrugarh University, Dibrugarh, Assam, India
| | - Neelutpal Gogoi
- Department of Pharmaceutical Sciences, Faculty of Science & Engineering, Dibrugarh University, Dibrugarh, Assam, India
| | - Sanchaita Rajkhowa
- Centre for Biotechnology and Bioinformatics, Dibrugarh University, Dibrugarh, Assam, India
| | - Shah Alam Khan
- College of Pharmacy, National University of Science and Technology, Muscat, Oman
| | - Nisreen Daffa Alla Omer Hajedris
- College of Medicine, Basic Medical Department, Almaarefa University, Riyadh, Saudi Arabia
- Faculty of Medicine, Department of Physiology, Khartoum University, Khartoum, Sudan
| | - Nawal Al-Hoshani
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Samia T Al-Shouli
- Immunology Unit, Pathology department, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Aparoop Das
- Department of Pharmaceutical Sciences, Faculty of Science & Engineering, Dibrugarh University, Dibrugarh, Assam, India
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Jia W, Liu X, Zhang Z. Role of TOP2A and CDC6 in liver cancer. Medicine (Baltimore) 2023; 102:e35604. [PMID: 37861550 PMCID: PMC10589547 DOI: 10.1097/md.0000000000035604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 09/20/2023] [Indexed: 10/21/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common malignant tumors with high mortality worldwide, which is characterized by aggressive growth and metastasis. However, the relationship between TOP2A and CDC6 and HCC remains unclear. GSE121248 and GSE101728 profiles for liver cancer were downloaded from the gene expression omnibus database generated using GPL21047and GPL570. Differentially expressed genes (DEGs) were screened and weighted gene co-expression network analysis was performed. The construction and analysis of protein-protein interaction network, functional enrichment analysis, gene set enrichment analysis. Gene expression heat map was drawn and survival analysis was performed. Comparative toxicogenomics database analysis were performed to find the disease most related to the core gene. TargetScan was used to screen miRNAs regulating central DEGs. 885 DEGs were identified. According to gene ontology analysis, they were mainly enriched in organic acid metabolism process, metabolic pathway, p53 signal pathway and PPAR signal pathway. The enrichment items are similar to the GOKEGG enrichment items of differentially expressed genes, mainly in the process of organic acid metabolism, p53 signal pathway and PPAR signal pathway. In the enrichment project of metascape, gene ontology has PIDPLK1 pathway, mitotic cell cycle, tumor retinoblastoma gene. The construction and analysis of protein-protein interaction network obtained 10 core genes (TOP2A, CDK1, ASPM, RACGAP1, ZWINT, CDC6, AURKA, NCAPG, BUB1B, CCNB1), and found that these core genes were highly expressed in tumor tissues and low in normal tissues. Comparative toxicogenomics database analysis showed that 10 genes (TOP2A, CDK1, ASPM, RACGAP1, ZWINT, CDC6, AURKA, NCAPG, BUB1B, CCNB1) were related to necrosis, inflammation, HCC, liver cirrhosis, and adenoid cystic carcinoma. TOP2A and CDC6 are highly expressed in liver cancer, which may become molecular targets for early diagnosis and precise treatment.
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Affiliation(s)
- Wei Jia
- Department of Digestive, Beijing Rehabilitation Hospital Affiliated to Capital Medical University, Badachu Xixia Village, Shijingshan District, Beijing, P.R. China
| | - Xiang Liu
- Department of Hepatobiliary Surgery, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Zhilei Zhang
- Department of Hepatobiliary Surgery, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
- School of Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei, P.R. China
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8
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Ding Z, Wu Y, Fang G, Lin Z, Lin K, Fu J, Huang Q, Tang Y, You W, Liu J, Zeng Y. Development and validation a radiomics nomogram for predicting thymidylate synthase status in hepatocellular carcinoma based on Gd-DTPA contrast enhanced MRI. BMC Cancer 2023; 23:991. [PMID: 37848807 PMCID: PMC10580573 DOI: 10.1186/s12885-023-11096-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 06/21/2023] [Indexed: 10/19/2023] Open
Abstract
OBJECTIVES The purpose of this study was to develop and validate a radiomics nomogram for predicting thymidylate synthase (TYMS) status in hepatocellular carcinoma (HCC) by using Gd-DTPA contrast enhanced MRI. METHODS We retrospectively enrolled 147 consecutive patients with surgically confirmed HCC and randomly allocated to training and validation set (7:3). The TYMS status was immunohistochemical determined and classified into low TYMS (positive cells ≤ 25%) and high TYMS (positive cells > 25%) groups. Radiomics features were extracted from the arterial phases and portal venous phase of Gd-DTPA contrast enhanced MRI. Least absolute shrinkage and selection operator (LASSO) were applied for generating the Rad score. Clinical data and MRI findings were assessed to build a clinical model. Rad score combined with clinical features was used to construct radiomics nomogram. RESULTS A total of 2260 features were extracted and reduced to 7 features as the most important discriminators to build the Rad score. InAFP was identified as the only independent clinical factors for TYMS status. The radiomics nomogram showed good discrimination in training (AUC, 0.759; 95% CI 0.665-0.838) and validation set (AUC, 0.739; 95% CI 0.585-0.860), and showed better discrimination capability (P < 0.05) compared with clinical model in training (AUC, 0.656; 95% CI 0.555-0.746) and validation set (AUC, 0.622; 95% CI 0.463-0.764). CONCLUSIONS The radiomics nomogram shows favorable predictive efficacy for TYMS status in HCC, which might be helpful for the personalized treatment of HCC.
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Affiliation(s)
- Zongren Ding
- Department of Hepatopancreatobiliary Surgery, Mengchao Hepatobiliary Hospital of Fujian Medical University, Xihong Road 312, Fuzhou, 350025 China
| | - Yijun Wu
- Department of Hepatopancreatobiliary Surgery, Mengchao Hepatobiliary Hospital of Fujian Medical University, Xihong Road 312, Fuzhou, 350025 China
| | - Guoxu Fang
- Department of Hepatopancreatobiliary Surgery, Mengchao Hepatobiliary Hospital of Fujian Medical University, Xihong Road 312, Fuzhou, 350025 China
| | - Zhaowang Lin
- Department of Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, 350025 China
| | - Kongying Lin
- Department of Hepatopancreatobiliary Surgery, Mengchao Hepatobiliary Hospital of Fujian Medical University, Xihong Road 312, Fuzhou, 350025 China
| | - Jun Fu
- Department of Hepatopancreatobiliary Surgery, Mengchao Hepatobiliary Hospital of Fujian Medical University, Xihong Road 312, Fuzhou, 350025 China
| | - Qizhen Huang
- Department of Radiotherapy, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, 350025 China
| | - Yanyan Tang
- Department of Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, 350025 China
| | - Wuyi You
- Department of Radiology, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, 350025 China
| | - Jingfeng Liu
- Fujian Provincial Cancer Hospital, Fuzhou, 350025 China
| | - Yongyi Zeng
- Department of Hepatopancreatobiliary Surgery, Mengchao Hepatobiliary Hospital of Fujian Medical University, Xihong Road 312, Fuzhou, 350025 China
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Li Y, Wang Z, Han F, Zhang M, Yang T, Chen M, Du J, Wang Y, Zhu L, Hou H, Chang Y, Han L, Lyu X, Zhang N, Sun W, Cai Z, Wei W. Single-cell transcriptome analysis profiles cellular and molecular alterations in submandibular gland and blood in IgG4-related disease. Ann Rheum Dis 2023; 82:1348-1358. [PMID: 37474274 DOI: 10.1136/ard-2023-224363] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/21/2023] [Indexed: 07/22/2023]
Abstract
OBJECTIVES The aim of this study is to profile the transcriptional landscapes of affected tissues and peripheral blood mononuclear cells (PBMCs) at the single-cell level in IgG4-related disease (IgG4-RD). Identifying the cell populations and crosstalk between immune cells and non-immune cells will assist us in understanding the aetiology of IgG4-RD. METHODS We performed single-cell RNA sequencing analysis on submandibular glands (SMGs) and PBMCs from patients with IgG4-RD and matched controls. Additionally, bulk RNA sequencing of PBMCs was used to construct the immune repertoire. Furthermore, multiplex immunofluorescence staining was performed to validate the transcriptomic results. RESULTS We identified three novel subsets of tissue-resident immune cells in the SMGs of patients with IgG4-RD. TOP2A_B cells and TOP2A_T cells had stemness signatures, and trajectory analysis showed that TOP2A_B cells may differentiate into IgG4+plasma cells and that TOP2A_T cells may differentiate into T follicular helper (Tfh) cells. ICOS_PD-1_B cells with Tfh-like characteristics appeared to be an intermediate state in the differentiation from B cells to IgG4+plasma cells. The cellular communication patterns within immune cells and between immune cells and non-immune cells were altered in IgG4-RD compared with controls. Consistently, infection-related pathways were shared in B cells and T cells from SMGs and PBMCs. Furthermore, immune clonotype analysis of PBMC samples showed the complementary determining region 3 amino acid CQQSYSTPYTF was expanded in patients with IgG4-RD. CONCLUSION Our data revealed the cellular and molecular changes at the single-cell resolution of IgG4-RD and provide valuable insights into the aetiology and novel therapeutic targets of the autoimmune disease.
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Affiliation(s)
- Yanmei Li
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Zhiqin Wang
- The Province and Ministry Co-Sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Pharmacology, School of Basic Medical Science, Tianjin Medical University, Tianjin, China
- National Key Laboratory of Blood Science, Tianjin, China
| | - Feng Han
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Mei Zhang
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Tong Yang
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Ming Chen
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Jun Du
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Yin Wang
- Department of Oral Surgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Li Zhu
- Department of Ultrasound, Tianjin Medical University General Hospital, Tianjin, China
| | - Hou Hou
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Yanxia Chang
- Department of Research and Development, Seekgene Biotechnology Co, Ltd, Beijing, China
| | - Lin Han
- Department of Oral Surgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Xing Lyu
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Na Zhang
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Wenwen Sun
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
| | - Zhigang Cai
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- The Province and Ministry Co-Sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Pharmacology, School of Basic Medical Science, Tianjin Medical University, Tianjin, China
- National Key Laboratory of Blood Science, Tianjin, China
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China
| | - Wei Wei
- Department of Rheumatology and Immunology, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Clinical Research Center for Rheumatic and Immune Diseases, Tianjin, China
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10
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Shen R, Li Z, Wu X. The mitotic spindle-related seven-gene predicts the prognosis and immune microenvironment of lung adenocarcinoma. J Cancer Res Clin Oncol 2023; 149:10131-10141. [PMID: 37266661 PMCID: PMC10423164 DOI: 10.1007/s00432-023-04906-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/20/2023] [Indexed: 06/03/2023]
Abstract
PURPOSE Abnormalities in the mitotic spindle have been linked to a variety of cancers. Data on their role in the onset, progression, and treatment of lung adenocarcinoma (LUAD) need to be explored. METHODS The data were retrieved from The Cancer Genome Atlas (TCGA), Gene Expression Omnibus (GEO), and Molecular Signatures Database (MSigDB), for the training cohort, external validation cohort, and the hallmark mitotic spindle gene set, respectively. Mitotic spindle genes linked to LUAD prognosis were identified and intersected with differentially expressed up-regulated genes in the training cohort. Nomogram prediction models were built based on least absolute shrinkage and selection operator (LASSO) regression, univariate cox, and multivariate cox analyses. The seven-gene immunological score was examined, as well as the correlation of immune checkpoints. The DLGAP5 and KIF15 expression in BEAS-2B, A549, H1299, H1975, and PC-9 cell lines was validated with western blot (WB). RESULTS A total of 965 differentially expressed up-regulated genes in the training cohort intersected with 51 mitotic spindle genes associated with LUAD prognosis. Finally, the seven-gene risk score was determined and integrated with clinical characteristics to construct the nomogram model. Immune cell correlation analysis revealed a negative correlation between seven-gene expression with B cell, endothelial cell (excluding LMNB1), and T cell CD8 + (p < 0.05). However, the seven-gene expression was positively correlated with multiple immune checkpoints (p < 0.05). The expression of DLGAP5 and KIF15 were significantly higher in A549, H1299, H1975, and PC-9 cell lines than that in BEAS-2B cell line. CONCLUSION High expression of the seven genes is positively correlated with poor prognosis of LUAD, and these genes are promising as prospective immunotherapy targets.
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Affiliation(s)
- Ruxin Shen
- Department of Thoracic Surgery, Affiliated Nantong Hospital of Shanghai University, Nantong, 226000, Jiangsu, China
| | - Zhaoshui Li
- Qingdao Medical College, Qingdao University, Qingdao, 266023, China
| | - Xiaoting Wu
- Department of Radiation Oncology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, 200433, China.
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11
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Evren AE, Karaduman AB, Sağlik BN, Özkay Y, Yurttaş L. Investigation of Novel Quinoline-Thiazole Derivatives as Antimicrobial Agents: In Vitro and In Silico Approaches. ACS OMEGA 2023; 8:1410-1429. [PMID: 36643421 PMCID: PMC9835529 DOI: 10.1021/acsomega.2c06871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
Infectious diseases are a major concern around the world. Today, it is an urgent need for new chemotherapeutics for infectious diseases. Because of that, our group designed, synthesized, and analyzed 14 new quinoline derivatives endowed with the pharmacophore moiety of fluoroquinolones primarily for their antimicrobial effects. Their cytotoxicity effects were tested against six bacterial and four fungal strains and NIH/3T3 cell line. Additionally, their action mechanisms were evaluated against DNA gyrase and lanosterol 14α-demethylase (LMD). Furthermore, to eliminate the potential side effects, the active compounds were evaluated against the aromatase enzyme. The experimental enzymatic results were evaluated for active compounds' binding modes using molecular docking and molecular dynamics simulation studies. The results were utilized to clarify the structure-activity relationship (SAR). Finally, compound 4m was the most potent compound for its antifungal activity with low cytotoxicity against healthy cells and fewer possible side effects, while compounds 4j and 4l can be used alone for special patients who are suffering from fungal infections in addition to the primer disease.
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Affiliation(s)
- Asaf Evrim Evren
- Department
of Pharmacy Services, Vocational School of Health Services, Bilecik Şeyh Edebali University, Bilecik 11000, Turkey
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
| | - Abdullah Burak Karaduman
- Department
of Pharmaceutical Toxicology, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
| | - Begüm Nurpelin Sağlik
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
- Central
Research Laboratory, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
| | - Yusuf Özkay
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
- Central
Research Laboratory, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
| | - Leyla Yurttaş
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir 26470, Turkey
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Comparative RNA-Sequencing Analysis Reveals High Complexity and Heterogeneity of Transcriptomic and Immune Profiles in Hepatocellular Carcinoma Tumors of Viral (HBV, HCV) and Non-Viral Etiology. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58121803. [PMID: 36557005 PMCID: PMC9785216 DOI: 10.3390/medicina58121803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022]
Abstract
Background and Objectives: Hepatocellular carcinoma (HCC), the most common type of primary liver cancer, is the leading cause of cancer-related mortality. It arises and progresses against fibrotic or cirrhotic backgrounds mainly due to infection with hepatitis viruses B (HBV) or C (HCV) or non-viral causes that lead to chronic inflammation and genomic changes. A better understanding of molecular and immune mechanisms in HCC subtypes is needed. Materials and Methods: To identify transcriptional changes in primary HCC tumors with or without hepatitis viral etiology, we analyzed the transcriptomes of 24 patients by next-generation sequencing. Results: We identified common and unique differentially expressed genes for each etiological tumor group and analyzed the expression of SLC, ATP binding cassette, cytochrome 450, cancer testis, and heat shock protein genes. Metascape functional enrichment analysis showed mainly upregulated cell-cycle pathways in HBV and HCV and upregulated cell response to stress in non-viral infection. GeneWalk analysis identified regulator, hub, and moonlighting genes and highlighted CCNB1, ACTN2, BRCA1, IGF1, CDK1, AURKA, AURKB, and TOP2A in the HCV group and HSF1, HSPA1A, HSP90AA1, HSPB1, HSPA5, PTK2, and AURKB in the group without viral infection as hub genes. Immune infiltrate analysis showed that T cell, cytotoxic, and natural killer cell markers were significantly more highly expressed in HCV than in non-viral tumors. Genes associated with monocyte activation had the highest expression levels in HBV, while high expression of genes involved in primary adaptive immune response and complement receptor activity characterized tumors without viral infection. Conclusions: Our comprehensive study underlines the high degree of complexity of immune profiles in the analyzed groups, which adds to the heterogeneous HCC genomic landscape. The biomarkers identified in each HCC group might serve as therapeutic targets.
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Fu H, Tan W, Chen Z, Ye Z, Duan Y, Huang J, Qi H, Liu X. TOP2A deficit-induced abnormal decidualization leads to recurrent implantation failure via the NF-κB signaling pathway. Reprod Biol Endocrinol 2022; 20:142. [PMID: 36138481 PMCID: PMC9494868 DOI: 10.1186/s12958-022-01013-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 09/10/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Successful implantation is a complex process that is influenced by embryo quality, endometrial receptivity, immune factors, and the specific type of in vitro fertilization protocol used. DNA topoisomerase IIα (TOP2A) is a well-known protein involved in cell proliferation; however, its expression and effect on the endometrium in recurrent implantation failure (RIF) have not been fully elucidated. METHODS The human endometrial tissues of healthy controls and patients with RIF were collected. A proteomic analysis was performed to evaluate the differentially expressed proteins between the RIF group and the fertile control group. The expression patterns of TOP2A in the human preimplantation endometrium of the patients with RIF were determined by immunohistochemical staining, Western blotting and qRT-PCR. TOP2A knockdown (sh-TOP2A) T-HESCs were generated using lentiviruses. The expression of TOP2A in T-HESCs was manipulated to investigate its role in decidualization. The TOP2A-related changes in decidualization were screened by mRNA sequencing in decidualized TOP2A knockdown and control T-HESCs and then confirmed by Western blotting and immunofluorescence staining. TOP2A-deficient mice were generated by injection of TOP2A-interfering adenovirus on GD2.5 and GD3.5. RESULTS We performed a proteomic analysis of endometrial tissues to investigate the potential pathogenesis of RIF by comparing the patients with RIF and the matched controls and found that TOP2A might be a key protein in RIF. TOP2A is ubiquitously expressed in both stromal and glandular epithelial cells of the endometrium. The data indicate that TOP2A expression is significantly lower in the mid-secretory endometrium of women with RIF. TOP2A expression was downregulated under stimulation by 8-bromo-cAMP and MPA. Ablation of TOP2A resulted in upregulated expression of decidual biomarkers and morphological changes in the cells. Mechanistic analysis revealed that TOP2A regulates the NF-κB signaling pathway in decidualized T-HESCs. The TOP2A-deficient mice exhibited lower fetal weights. CONCLUSIONS Our findings revealed that abnormal expression of TOP2A affects decidualization and changes the "window of implantation", leading to RIF. TOP2A participates in the processes of decidualization and embryo implantation, functioning at least in part through the NF-κB pathway. Regulating the expression of TOP2A in the endometrium may become a new strategy for the prevention and treatment of RIF.
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Affiliation(s)
- Huijia Fu
- Department of Reproductive Medicine Center, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing, 400016, China
- Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, Chongqing Medical University, Chongqing, 400016, China
- Joint International Research Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, Chongqing, 400016, China
| | - Wang Tan
- Department of Reproductive Medicine Center, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing, 400016, China
- Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, Chongqing Medical University, Chongqing, 400016, China
| | - Zhi Chen
- Department of Gynecology, Chongqing Traditional Chinese Medicine Hospital, Chongqing, 400021, No, China
| | - Zi Ye
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yuhan Duan
- Department of Reproductive Medicine Center, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing, 400016, China
- Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, Chongqing Medical University, Chongqing, 400016, China
| | - Jiayu Huang
- Department of Reproductive Medicine Center, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing, 400016, China
| | - Hongbo Qi
- Joint International Research Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, Chongqing, 400016, China.
- Chongqing Key Laboratory of Maternal and Fetal Medicine, Chongqing Medical University, Chongqing, 400016, China.
- Department of Obstetrics, Women and Children's Hospital of Chongqing Medical University (Chongqing Health Center for Women and Children), 400010, Chongqing, China.
| | - Xiru Liu
- Department of Reproductive Medicine Center, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing, 400016, China.
- Joint International Research Laboratory of Reproduction and Development of Chinese Ministry of Education, Chongqing Medical University, Chongqing, 400016, China.
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Shinde Y, Patil R, Badireenath Konkimalla V, Merugu SB, Mokashi V, Harihar S, Marrot J, Butcher RJ, Salunke-Gawali S. Keto-enol tautomerism of hydroxynaphthoquinoneoxime ligands: Copper complexes and topoisomerase inhibition activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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A comprehensive review on acridone based derivatives as future anti-cancer agents and their structure activity relationships. Eur J Med Chem 2022; 239:114527. [PMID: 35717872 DOI: 10.1016/j.ejmech.2022.114527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 05/27/2022] [Accepted: 06/07/2022] [Indexed: 11/03/2022]
Abstract
The development of drug resistance and severe side-effects has reduced the clinical efficacy of the existing anti-cancer drugs available in the market. Thus, there is always a constant need to develop newer anti-cancer drugs with minimal adverse effects. Researchers all over the world have been focusing on various alternative strategies to discover novel, potent, and target specific molecules for cancer therapy. In this direction, several heterocyclic compounds are being explored but amongst them one promising heterocycle is acridone which has attracted the attention of medicinal chemists and gained huge biological importance as acridones are found to act on different therapeutically proven molecular targets, overcome ABC transporters mediated drug resistance and DNA intercalation in cancer cells. Some of these acridone derivatives have reached clinical studies as these heterocycles have shown huge potential in cancer therapeutics and imaging. Here, the authors have attempted to compile and make some recommendations of acridone based derivatives concerning their cancer biological targets and in vitro-cytotoxicity based on drug design and novelty to increase their therapeutic potential. This review also provides some important insights on the design, receptor targeting and future directions for the development of acridones as possible clinically effective anti-cancer agents.
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16
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Islam MR, Fahmy H. Thiazolopyrimidine Scaffold as a Promising Nucleus for Developing Anticancer Drugs: a Review in Last Decade. Anticancer Agents Med Chem 2022; 22:2942-2955. [PMID: 35410622 DOI: 10.2174/1871520622666220411110528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 12/27/2021] [Accepted: 02/03/2022] [Indexed: 11/22/2022]
Abstract
The thiazolopyrimidine nucleus is a bioisostericanalog of purine and an important class of N-containing heterocycles. Thiazolopyrimidine scaffolds are considered a promising class of bioactive compounds that encompass diverse biological activities such as antibacterial, antiviral, antifungal, anticancer, corticotrophin-releasing factor antagonists, anti-inflammatory, antituberculosis, and glutamic receptors antagonists. Despite the importance of thiazolopyrimidines from a pharmacological viewpoint, there is hardly a comprehensive review on this important heterocyclic nucleus. Throughout the years, those scaffolds have been studied extensively for its anticancer properties and several compounds were designed, synthesized, and evaluated for their anticancer effects with activity in the µM to nM range. However, there are hardly any reviews covering the anticancer effects of thiazolopyrimidines. In this review, an effort was made to compile literatures covering the anticancer activity of thiazolopyrimidines reported in the last decade (2010-2020). Nearly thirty articles were reviewed and compounds which IC50 < 50 µM against at least 50% of the used cell lines were listed in this review. The best ten compounds (10a, 14b, 17g, 18,25e, 25k, 34e, 41i, 49a, & 49c) show the best anticancer activity against the corresponding cell lines during the last 10 years are highlighted. By highlighting the most active compounds, this review article sheds light on the structural features associated with the strongest anticancer effects to provide guidance to future research aiming to develop anticancer molecules.
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Affiliation(s)
- Md Rabiul Islam
- Department of Pharmaceutical Science, College of Pharmacy & Allied Health Professions, South Dakota State University, Brookings, SD 57007, USA
| | - Hesham Fahmy
- Department of Pharmaceutical Science, College of Pharmacy & Allied Health Professions, South Dakota State University, Brookings, SD 57007, USA
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17
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Meng J, Wei Y, Deng Q, Li L, Li X. Study on the expression of TOP2A in hepatocellular carcinoma and its relationship with patient prognosis. Cancer Cell Int 2022; 22:29. [PMID: 35033076 PMCID: PMC8761301 DOI: 10.1186/s12935-021-02439-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/30/2021] [Indexed: 11/18/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is a primary liver cancer with a high mortality rate. However, the molecular mechanism of HCC formation remains to be explored and studied. Objective To investigate the expression of TOP2A in hepatocellular carcinoma (HCC) and its prognosis. Methods The data set of hepatocellular carcinoma was downloaded from GEO database for differential gene analysis, and hub gene was identified by Cytoscape. GEPIA was used to verify the expression of HUB gene and evaluate its prognostic value. Then TOP2A was selected as the research object of this paper by combining literature and clinical sample results. Firstly, TIMER database was used to study TOP2A, and the differential expression of TOP2A gene between normal tissues and cancer tissues was analyzed, as well as the correlation between TOP2A gene expression and immune infiltration of HCC cells. Then, the expression of top2a-related antibodies was analyzed using the Human Protein Atlas database, and the differential expression of TOP2A was verified by immunohistochemistry. Then, SRTING database and Cytoscape were used to establish PPI network for TOP2A and protein–protein interaction analysis was performed. The Oncomine database and cBioPortal were used to express and identify TOP2A mutation-related analyses. The expression differences of TOP2A gene were identified by LinkedOmics, and the GO and KEGG pathways were analyzed in combination with related genes. Finally, Kaplan–Meier survival analysis was performed to analyze the clinical and prognosis of HCC patients. Results TOP2A may be a new biomarker and therapeutic target for hepatocellular carcinoma. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-021-02439-0.
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Affiliation(s)
- Jiali Meng
- Clinical Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Yuanchao Wei
- Clinical Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Qing Deng
- Clinical Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Ling Li
- Department of Pathology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Xiaolong Li
- Department of Cell Biology and Genetics, School of Pre-Clinical Medicine, Key Laboratory of Longevity and Agingrelated Diseases of Chinese Ministry of Education, Guangxi Medical University, Nanning, 530021, China.
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Zhou Y, Li J, Yang X, Song Y, Li H. Rhophilin rho GTPase binding protein 1-antisense RNA 1 (RHPN1-AS1) promotes ovarian carcinogenesis by sponging microRNA-485-5p and releasing DNA topoisomerase II alpha ( TOP2A). Bioengineered 2021; 12:12003-12022. [PMID: 34787052 PMCID: PMC8810118 DOI: 10.1080/21655979.2021.2002494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/22/2021] [Accepted: 10/30/2021] [Indexed: 10/29/2022] Open
Abstract
Ovarian cancer (OC) is the most common and lethal gynecological cancer worldwide. Long non-coding RNAs (lncRNAs) and sponging microRNAs (miRNAs) serve as key regulators in the biological processes of OC. We sought to evaluate the effect of the RHPN1-AS1-miR-485-5p-DNA topoisomerase II alpha (TOP2A) axis in regulating OC progression. RHPN1-AS1, miR-485-5p, and TOP2A levels in OC tissues and cells were determined by RT-qPCR. The interaction of RHPN1-AS1/miR-485-5p/TOP2A was assessed using luciferase, RNA immunoprecipitation, and RNA pull-down assays. RHPN1-AS1 silencing allowed us to explore its biological function by measuring cell viability, proliferation, migration, invasion, and apoptosis in OC cells. In vivo experiments were performed to verify the in vitro findings. We found that the RHPN1-AS1 and TOP2A levels were significantly enhanced, whereas the miR-485-5p levels were reduced in OC tissues and cells. RHPN1-AS1 silencing attenuated cell growth, facilitated apoptosis in OC cells, and inhibited tumor growth in vivo. Notably, RHPN1-AS1 negatively regulating miR-485-5p promoted the TOP2A expression in OC cells. In conclusion, RHPN1-AS1 sponging miR-485-5p accelerated the progression of OC by elevating TOP2A expression, which makes it a promising target for the treatment of OC patients.
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Affiliation(s)
- Yi Zhou
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha, Hunan, China
- Academician Workstation, Changsha Medical University, Changsha, Hunan, China
| | - Jing Li
- Department of Obstetrics and Gynecology, Wuhan Third Hospital, Wuhan, Hubei, China
| | - Xiaoxin Yang
- Department of Obstetrics and Gynecology, Wuhan Third Hospital, Wuhan, Hubei, China
| | - Yu Song
- Department of Obstetrics and Gynecology, Wuhan Third Hospital, Wuhan, Hubei, China
| | - Haigang Li
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha, Hunan, China
- Academician Workstation, Changsha Medical University, Changsha, Hunan, China
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Parra-Nunez P, Cooper C, Sanchez-Moran E. The Role of DNA Topoisomerase Binding Protein 1 (TopBP1) in Genome Stability in Arabidopsis. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10122568. [PMID: 34961037 PMCID: PMC8706423 DOI: 10.3390/plants10122568] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/19/2021] [Accepted: 11/23/2021] [Indexed: 05/17/2023]
Abstract
DNA topoisomerase II (TOPII) plays a very important role in DNA topology and in different biological processes such as DNA replication, transcription, repair, and chromosome condensation in higher eukaryotes. TOPII has been found to interact directly with a protein called topoisomerase II binding protein 1 (TopBP1) which also seems to have important roles in DNA replication and repair. In this study, we conducted different experiments to assess the roles of TopBP1 in DNA repair, mitosis, and meiosis, exploring the relationship between TOPII activity and TopBP1. We found that topbp1 mutant seedlings of Arabidopsis thaliana were hypersensitive to cisplatin treatment and the inhibition of TOPII with etoposide produced similar hypersensitivity levels. Furthermore, we recognised that there were no significant differences between the WT and topbp1 seedlings treated with cisplatin and etoposide together, suggesting that the hypersensitivity to cisplatin in the topbp1 mutant could be related to the functional interaction between TOPII and TopBP1. Somatic and meiotic anaphase bridges appeared in the topbp1 mutant at similar frequencies to those when TOPII was inhibited with merbarone, etoposide, or ICFR-187. The effects on meiosis of TOPII inhibition were produced at S phase/G2 stage, suggesting that catenanes could be produced at the onset of meiosis. Thus, if the processing of the catenanes is impaired, some anaphase bridges can be formed. Also, the appearance of anaphase bridges at first and second division is discussed.
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He Y, Liu X, Wang H, Wu L, Jiang M, Guo H, Zhu J, Wu S, Sun H, Chen S, Zhu Y, Zhou C, Yang Y. Mechanisms of Progression and Heterogeneity in Multiple Nodules of Lung Adenocarcinoma. SMALL METHODS 2021; 5:e2100082. [PMID: 34927899 DOI: 10.1002/smtd.202100082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 02/27/2021] [Indexed: 06/14/2023]
Abstract
Lung cancer remains the leading cause of cancer-related death worldwide. Lung adenocarcinoma (LUAD) is thought to be caused by precursor lesions of atypical adenoma-like hyperplasia and may have extensive in situ growth before infiltration. To explore the relevant factors in heterogeneity and evolution of lung adenocarcinoma subtypes, the authors perform single-cell RNA sequencing (scRNA-seq) on tumor and normal tissue from five multiple nodules' LUAD patients and conduct a thorough gene expression profiling of cancer cells and cells in their microenvironment at single-cell level. This study gives a deep understanding of heterogeneity and evolution in early glandular neoplasia of the lung. This dataset leads to discovery of the changes in the immune microenvironment during the development of LUAD, and the development process from adenocarcinoma in situ (AIS) to invasive adenocarcinoma (IAC). This work sheds light on the direction of early tumor development and whether they are homologous.
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Affiliation(s)
- Yayi He
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Xiaogang Liu
- Department of Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Hao Wang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Liang Wu
- Department of Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Minlin Jiang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Haoyue Guo
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Junjie Zhu
- Department of Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Shengyu Wu
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Hui Sun
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Shanhao Chen
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Yuming Zhu
- Department of Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Caicun Zhou
- Department of Medical Oncology, Shanghai Pulmonary Hospital, Tongji University Medical School Cancer Institute, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
| | - Yang Yang
- Department of Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No 507 Zhengmin Road, Shanghai, 200433, China
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
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21
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UPF1 promotes chemoresistance to oxaliplatin through regulation of TOP2A activity and maintenance of stemness in colorectal cancer. Cell Death Dis 2021; 12:519. [PMID: 34021129 PMCID: PMC8140095 DOI: 10.1038/s41419-021-03798-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 02/04/2023]
Abstract
UPF1 is proved to dysregulate in multiple tumors and influence carcinogenesis. However, the role of UPF1 in oxaliplatin resistance in colorectal cancer (CRC) remains unknown. In our study, UPF1 is upregulated in CRC in mRNA and protein levels and overexpression of UPF1 predicts a poor overall survival (OS) and recurrence-free survival (RFS) in CRC patients and is an independent risk factor for recurrence. UPF1 promotes chemoresistance to oxaliplatin in vitro and in vivo. UPF1-induced oxaliplatin resistance can be associated with interaction between zinc finger of UPF1 and Toprim of TOP2A and increasing phosphorylated TOP2A in a SMG1-dependent manner. Moreover, UPF1 maintains stemness in a TOP2A-dependent manner in CRC. Taken together, UPF1 was overexpressed and predicted a poor prognosis in CRC. UPF1 enhanced chemoresistance to oxaliplatin in CRC, which may result from regulation of TOP2A activity and maintenance of stemness. Our findings could provide a new therapy strategy for chemoresistance to oxaliplatin in CRC patients.
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González-Alvarez ME, McGuire BC, Keating AF. Obesity alters the ovarian proteomic response to zearalenone exposure†. Biol Reprod 2021; 105:278-289. [PMID: 33855340 PMCID: PMC8256104 DOI: 10.1093/biolre/ioab069] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/10/2021] [Accepted: 04/07/2021] [Indexed: 12/21/2022] Open
Abstract
Zearalenone (ZEN), a nonsteroidal estrogenic mycotoxin, is detrimental to female reproduction. Altered chemical biotransformation, depleted primordial follicles and a blunted genotoxicant response have been discovered in obese female ovaries, thus, this study investigated the hypothesis that obesity would enhance ovarian sensitivity to ZEN exposure. Seven-week-old female wild-type nonagouti KK.Cg-a/a mice (lean) and agouti lethal yellow KK.Cg-Ay/J mice (obese) received food and water ad libitum, and either saline or ZEN (40 μg/kg) per os for 15 days. Body and organ weights, and estrous cyclicity were recorded, and ovaries collected posteuthanasia for protein analysis. Body and liver weights were increased (P < 0.05) in the obese mice, but obesity did not affect (P > 0.05) heart, kidney, spleen, uterus, or ovary weight and there was no impact (P > 0.05) of ZEN exposure on body or organ weight in lean or obese mice. Obese mice had shorter proestrus (P < 0.05) and a tendency (P = 0.055) for longer metestrus/diestrus. ZEN exposure in obese mice increased estrus but shortened metestrus/diestrus length. Neither obesity nor ZEN exposure impacted (P > 0.05) circulating progesterone, or ovarian abundance of EPHX1, GSTP1, CYP2E1, ATM, BRCA1, DNMT1, HDAC1, H4K16ac, or H3K9me3. Lean mice exposed to ZEN had a minor increase in γH2AX abundance (P < 0.05). In lean and obese mice, LC–MS/MS identified alterations to proteins involved in chemical metabolism, DNA repair and reproduction. These data identify ZEN-induced adverse ovarian modes of action and suggest that obesity is additive to ZEN-induced ovotoxicity.
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Affiliation(s)
- M Estefanía González-Alvarez
- Department of Animal Science and Interdepartmental Toxicology Graduate Program, Iowa State University, Ames IA, USA
| | - Bailey C McGuire
- Department of Animal Science and Interdepartmental Toxicology Graduate Program, Iowa State University, Ames IA, USA
| | - Aileen F Keating
- Department of Animal Science and Interdepartmental Toxicology Graduate Program, Iowa State University, Ames IA, USA
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23
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Matias-Barrios VM, Radaeva M, Song Y, Alperstein Z, Lee AR, Schmitt V, Lee J, Ban F, Xie N, Qi J, Lallous N, Gleave ME, Cherkasov A, Dong X. Discovery of New Catalytic Topoisomerase II Inhibitors for Anticancer Therapeutics. Front Oncol 2021; 10:633142. [PMID: 33598437 PMCID: PMC7883873 DOI: 10.3389/fonc.2020.633142] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 12/15/2020] [Indexed: 01/23/2023] Open
Abstract
Poison inhibitors of DNA topoisomerase II (TOP2) are clinically used drugs that cause cancer cell death by inducing DNA damage, which mechanism of action is also associated with serious side effects such as secondary malignancy and cardiotoxicity. In contrast, TOP2 catalytic inhibitors induce limited DNA damage, have low cytotoxicity, and are effective in suppressing cancer cell proliferation. They have been sought after to be prospective anticancer therapies. Herein the discovery of new TOP2 catalytic inhibitors is described. A new druggable pocket of TOP2 protein at its DNA binding domain was used as a docking site to virtually screen ~6 million molecules from the ZINC15 library. The lead compound, T60, was characterized to be a catalytic TOP2 inhibitor that binds TOP2 protein and disrupts TOP2 from interacting with DNA, resulting in no DNA cleavage. It has low cytotoxicity, but strongly inhibits cancer cell proliferation and xenograft growth. T60 also inhibits androgen receptor activity and prostate cancer cell growth. These results indicate that T60 is a promising candidate compound that can be further developed into new anticancer drugs.
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Affiliation(s)
- Victor M Matias-Barrios
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Mariia Radaeva
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Yi Song
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zaccary Alperstein
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Ahn R Lee
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Veronika Schmitt
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Joseph Lee
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Fuqiang Ban
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Ning Xie
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Jianfei Qi
- Department of Biochemistry and Molecular Biology, University of Maryland, Baltimore, Baltimore, MD, United States
| | - Nada Lallous
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Martin E Gleave
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Artem Cherkasov
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Xuesen Dong
- The Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
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Ayyamperumal S, DJ D, Tallapaneni V, Mohan S, S B, Selvaraj J, Joghee NM, MJN C. Molecular docking analysis of α-Topoisomerase II with δ-Carboline derivatives as potential anticancer agents. Bioinformation 2021; 17:249-265. [PMID: 34393444 PMCID: PMC8340707 DOI: 10.6026/97320630017249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/30/2021] [Accepted: 01/31/2021] [Indexed: 11/29/2022] Open
Abstract
The enzyme, α-topoisomerase II (α-Topo II), is known to regulate efficiently the topology of DNA. It is highly expressed in rapidly proliferating cells and plays an important role in replication, transcription and chromosome organisation. This has prompted several investigators to pursue α-Topo II inhibitors as anticancer agents. δ-Carboline, a natural product, and its synthetic derivatives are known to exert potent anticancer activity by selectively targeting α-Topo II. Therefore, it is of interest to design carboline derivatives fused with pyrrolidine-2,5-dione in this context. δ-Carbolines fused with pyrrolidine-2,5-dione are of interest because the succinimide part of fused heteroaromatic molecule can interact with the ATP binding pocket via the hydrogen bond network with selectivity towards α-Topo II. The 300 derivatives designed were subjected to the Lipinski rule of 5, ADMET and toxicity prediction. The designed compounds were further analysed using molecular docking analysis on the active sites of the α-Topo II crystal structure (PDB ID:1ZXM). Molecular dynamic simulations were also performed to compare the binding mode and stability of the protein-ligand complexes. Compounds with ID numbers AS89, AS104, AS119, AS209, AS239, AS269, and AS299 show good binding activity compared to the co-crystal ligand. Molecular Dynamics simulation studies show that the ligand binding to α-Topo II in the ATP domain is stableand the protein-ligand conformation remains unchanged. Binding free energy calculations suggest that seven molecules designed are potential inhibitors for α-Topo II for further consideration as anticancer agents.
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Affiliation(s)
- Selvaraj Ayyamperumal
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris - 643001,Tamil Nadu, India
| | - Dhananjay DJ
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi - 110067, India
| | - Vyshnavi Tallapaneni
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris - 643001,Tamil Nadu, India
| | - Surender Mohan
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi - 110067, India
| | - Basappa S
- Department of Studies in Organic Chemistry, University of Mysore, Manasagangotri, Mysore - 570006, Karnataka, India
| | - Jubie Selvaraj
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris - 643001,Tamil Nadu, India
| | - Nanjan Moola Joghee
- PG Studies and Research, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris - 643001, Tamil Nadu, India
| | - Chandrasekar MJN
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris - 643001,Tamil Nadu, India
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25
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Nemr MTM, Sonousi A, Marzouk AA. Design, synthesis and antiproliferative evaluation of new tricyclic fused thiazolopyrimidines targeting topoisomerase II: Molecular docking and apoptosis inducing activity. Bioorg Chem 2020; 105:104446. [PMID: 33171405 DOI: 10.1016/j.bioorg.2020.104446] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 09/29/2020] [Accepted: 10/28/2020] [Indexed: 12/29/2022]
Abstract
A novel series of thiazolopyrimidines and fused thiazolopyrimidines was designed and synthesized as topoisomerase II alpha inhibitors. All synthesized compounds were screened by the National Cancer Institute (NCI), Bethesda, USA for anticancer activity against 60 human cancer cell lines representing the following cancer types: leukemia, non-small cell lung, colon, CNS, melanoma, ovarian, renal, prostate, and breast cancers. Compound 3a was found to be the most potent inhibitor on renal cell line (A-498) causing 83.03% inhibition (IC50 = 1.89 μM). DNA-flow cytometric analysis showed that compound 3a induce cell cycle arrest at G2/M phase leading to cell proliferation inhibition and apoptosis. Moreover, fused thiazolopyrimidines 3a showed potent topoisomerase II inhibitory activity (IC50 = 3.19 μM) when compared with reference compound doxorubicin (IC50 = 2.67 μM). Docking study of all the synthesized compounds showed that compound 3a interacts in a similar pattern to etoposide and stabilizing the topoisomerase cleavage complex (Top2-cc) that accounts for its high potency.
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Affiliation(s)
- Mohamed T M Nemr
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Eini Street 11562, Cairo, Egypt
| | - Amr Sonousi
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Eini Street 11562, Cairo, Egypt.
| | - Adel A Marzouk
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut 71524, Egypt
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Jaswal S, Nehra B, Kumar S, Monga V. Recent advancements in the medicinal chemistry of bacterial type II topoisomerase inhibitors. Bioorg Chem 2020; 104:104266. [PMID: 33142421 DOI: 10.1016/j.bioorg.2020.104266] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/14/2020] [Accepted: 08/31/2020] [Indexed: 02/06/2023]
Abstract
Replication proteins are sought as a potential targets for antimicrobial agents. Despite their promising target characteristics, only topoisomerase II inhibitors targeting DNA gyrase and/or topoisomerase IV have reached clinical use. Topoisomerases are the enzymes that are essential for cellular functions and various biological activities. A wide range of natural and synthetic compounds have been identified as potential topoisomerase inhibitors but the resistance is most commonly found in these drugs. The emergence of FQ resistance has increased the need for the development of novel topoisomerase inhibitors with efficacy and high potency against FQ-resistant strains. Besides structural modifications of existing FQ scaffolds, novel non-quinolone topoisomerase II inhibitors, known as novel bacterial topoisomerase inhibitors, have been developed which showed remarkable inhibitory activity against DNA gyrase/topoisomerase IV or both with an improved spectrum of antibacterial potency including drug-resistant strains. This review aims to summarize various recent advancements in the medicinal chemistry of topoisomerase inhibitors with the following objectives: (1) To represent inclusive data on types of topoisomerases and various marketed topoisomerase inhibitors as drugs; (2) To discuss the recent advances in the medicinal chemistry of various topoisomerase inhibitors (DNA gyrase and topo IV) belonging to different structural classes as potential antibacterial agents; (3) To summarizes the structure activity relationship (SAR) including in silico and mechanistic studies to afford ideas and to provide focused direction for the development of new chemical entities which are effective against drug-resistant bacterial pathogens and biofilms.
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Affiliation(s)
- Shalini Jaswal
- Department of Pharmaceutical Chemistry, ISF College of Pharmacy, GT Road, Ghal Kalan, Moga 142001, Punjab, India
| | - Bhupender Nehra
- Department of Pharmaceutical Chemistry, ISF College of Pharmacy, GT Road, Ghal Kalan, Moga 142001, Punjab, India
| | - Shubham Kumar
- Department of Pharmaceutical Chemistry, ISF College of Pharmacy, GT Road, Ghal Kalan, Moga 142001, Punjab, India
| | - Vikramdeep Monga
- Department of Pharmaceutical Chemistry, ISF College of Pharmacy, GT Road, Ghal Kalan, Moga 142001, Punjab, India.
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Sagredou S, Dalezis P, Nikoleousakos N, Nikolaou M, Voura M, Almpanakis K, Panayiotidis MI, Sarli V, Trafalis DT. 3,6-Disubstituted 1,2,4-Triazolo[3,4- b]Thiadiazoles with Anticancer Activity Targeting Topoisomerase II Alpha. Onco Targets Ther 2020; 13:7369-7386. [PMID: 32801761 PMCID: PMC7395825 DOI: 10.2147/ott.s254856] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 05/30/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Topoisomerase IIα (topIIα) maintains the topology of DNA in order to ensure the proper functioning of numerous DNA processes. Inhibition of topIIα leads to the killing of cancer cells thus constituting such inhibitors as useful tools in cancer therapeutics. Triazolo[3,4-b]thiadiazole derivatives are known for their wide range of pharmacological activities while previous studies have documented their in vitro anticancer activity. The purpose of the current study was to investigate if these chemical compounds can act as topIIα inhibitors in cell-free and cell-based systems. MATERIALS AND METHODS The MTT assay was performed in DLD-1, HT-29, and LoVo cancer cells so as to evaluate the antiproliferative activity of KA25, KA26, and KA39 triazolo[3,4-b]thiadiazole derivatives. The KA39 compound was tested as a potential topIIα inhibitor using the plasmid-based topoisomerase II drug screening kit. The inhibitory effect of the three derivatives on topIIα phosphorylation was studied in HT-29 and LoVo cancer cells according to Human Phospho-TOP2A/Topoisomerase II Alpha Cell-Based Phosphorylation ELISA Kit. Moreover, flow cytometry was utilized in order to explore apoptotic induction and cell cycle growth arrest, upon treatment with KA39, in DLD-1 and HT-29 cells, respectively. In silico studies were also carried out for further investigation. RESULTS All three triazolo[3,4-b]thiadiazole derivatives showed an in vitro antiproliferative effect with the KA39 compound being the most potent one. Our results indicated that KA39 induced both early and late apoptosis as well as cell cycle growth arrest in S phase. In addition, the compound blocked the relaxation of supercoiled DNA while it also inhibited topIIα phosphorylation (upon treatment; P<0.001). CONCLUSION Among the three triazolo[3,4-b]thiadiazole derivatives, KA39 was shown to be the most potent anticancer agent and catalytic inhibitor of topIIα phosphorylation as well.
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Affiliation(s)
- Sofia Sagredou
- Laboratory of Pharmacology, Faculty of Medicine, National and Kapodistrian University of Athens, Athens11527, Greece
| | - Panagiotis Dalezis
- Laboratory of Pharmacology, Faculty of Medicine, National and Kapodistrian University of Athens, Athens11527, Greece
| | - Nikolaos Nikoleousakos
- Laboratory of Pharmacology, Faculty of Medicine, National and Kapodistrian University of Athens, Athens11527, Greece
| | - Michail Nikolaou
- Laboratory of Pharmacology, Faculty of Medicine, National and Kapodistrian University of Athens, Athens11527, Greece
| | - Maria Voura
- Department of Chemistry, Aristotle University of Thessaloniki , Thessaloniki, 54124, Greece
| | | | - Mihalis I Panayiotidis
- Department of Electron Microscopy & Molecular Pathology, The Cyprus Institute of Neurology & Genetics, Nicosia2371, Cyprus
- The Cyprus School of Molecular Medicine, Nicosia1683, Cyprus
| | - Vasiliki Sarli
- Department of Chemistry, Aristotle University of Thessaloniki , Thessaloniki, 54124, Greece
| | - Dimitrios T Trafalis
- Laboratory of Pharmacology, Faculty of Medicine, National and Kapodistrian University of Athens, Athens11527, Greece
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Chromosome Segregation in Bacillus subtilis Follows an Overall Pattern of Linear Movement and Is Highly Robust against Cell Cycle Perturbations. mSphere 2020; 5:5/3/e00255-20. [PMID: 32554717 PMCID: PMC7300352 DOI: 10.1128/msphere.00255-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
We have followed the segregation of origin regions on the Bacillus subtilis chromosome in the fastest practically achievable temporal manner, for a large fraction of the cell cycle. We show that segregation occurred in highly variable patterns but overall in an almost linear manner throughout the cell cycle. Segregation was slowed down, but not arrested, by treatment of cells that led to transient blocks in DNA replication, showing that segregation is highly robust against cell cycle perturbation. Computer simulations based on entropy-driven separation of newly synthesized DNA polymers can recapitulate sudden bursts of movement and segregation patterns compatible with the observed in vivo patterns, indicating that for Bacillus, segregation patterns may include entropic forces helping to separate chromosomes during the cell cycle. Although several proteins have been identified that facilitate chromosome segregation in bacteria, no clear analogue of the mitotic machinery in eukaryotic cells has been identified. In order to investigate if recognizable patterns of segregation exist during the cell cycle, we tracked the segregation of duplicated origin regions in Bacillus subtilis for 60 min in the fastest practically achievable resolution, achieving 10-s intervals. We found that while separation occurred in random patterns, often including backwards movement, overall, segregation of loci near the origins of replication was linear for the entire cell cycle. Thus, the process of partitioning can be best described as directed motion. Simulations with entropy-driven separation of polymers synthesized by two polymerases show sudden bursts of movement and segregation patterns compatible with the observed in vivo patterns, showing that for Bacillus, segregation patterns can be modeled based on entropic forces. To test if obstacles for replication forks lead to an alteration of the partitioning pattern, we challenged cells with chemicals inducing DNA damage or blocking of topoisomerase activity. Both treatments led to a moderate slowing down of separation, but linear segregation was retained, showing that chromosome segregation is highly robust against cell cycle perturbation. IMPORTANCE We have followed the segregation of origin regions on the Bacillus subtilis chromosome in the fastest practically achievable temporal manner, for a large fraction of the cell cycle. We show that segregation occurred in highly variable patterns but overall in an almost linear manner throughout the cell cycle. Segregation was slowed down, but not arrested, by treatment of cells that led to transient blocks in DNA replication, showing that segregation is highly robust against cell cycle perturbation. Computer simulations based on entropy-driven separation of newly synthesized DNA polymers can recapitulate sudden bursts of movement and segregation patterns compatible with the observed in vivo patterns, indicating that for Bacillus, segregation patterns may include entropic forces helping to separate chromosomes during the cell cycle.
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Sorafenib and Mesenchymal Stem Cell Therapy: A Promising Approach for Treatment of HCC. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:9602728. [PMID: 32617114 PMCID: PMC7312705 DOI: 10.1155/2020/9602728] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/06/2020] [Accepted: 05/21/2020] [Indexed: 12/11/2022]
Abstract
Hepatocellular carcinoma (HCC) is the fifth most commonly diagnosed cancer and the second most common cause of cancer-related death worldwide. Sorafenib (Sora) is used as a targeted therapy for HCC treatment. Mesenchymal stem cells (MSCs) are applied as a new approach to fight malignancies. Drug resistance and side effects are the major concerns with Sora administration. The effect of using the combination of sorafenib and MSCs on tumor regression in xenograft HCC models was evaluated in this study. Methods and Materials. Human hepatocellular carcinoma cell lines (HepG2) were subcutaneously implanted into the flank of 18 nude mice. The animals were randomly divided into six groups (n = 3); each received Sora (oral), MSCs (IV injection), MSCs (local injection), Sora + MSCs (IV injection), Sora + MSCs (local injection), or no treatment (the control group). Six weeks after tumor implantation, the mice were scarified and tumoral tissues were resected in their entirety. Histopathological and immunohistochemical evaluations were used to measure tumor proliferation and angiogenesis. Apoptotic cells were quantified using the TUNEL assay. Results. No significant difference was found in the tumor grade among the treatment groups. Differentiation features of the tumoral cells were histopathologically insignificant in all the groups. Tumor necrosis was highest in the hpMSC (local) + Sora group. Tumor cell proliferation was reduced in hpMSC (local) + Sora-treated and hpMSC (IV) + Sora-treated mice compared with the other groups. Apoptotic-positive cells occupied a greater proportion in the Sora, hpMSC (IV) + Sora, and hpMSC (local) + Sora groups. Conclusion. A combination of chemotherapy and MSC can yield to more favorable results in the treatment of HCC.
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Sekhar T, Thriveni P, Venkateswarlu A, Daveedu T, Peddanna K, Sainath SB. One-pot synthesis of thiazolo[3,2-a]pyrimidine derivatives, their cytotoxic evaluation and molecular docking studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 231:118056. [PMID: 32006911 DOI: 10.1016/j.saa.2020.118056] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
An economical, simple and efficient one-pot method has been developed for the synthesis of thiazolo[3,2-a]pyrimidine hydrobromide derivatives. 2,4-diaryl-6,7,8,9-tetrahydro-4H-benzo[4,5]thiazolo[3,2-a]pyrimidine hydrobromides were synthesized by the α-bromination of cyclohexanone with N-Bromosuccinamide (NBS) and followed by cyclization with 3,4-dihydropyrimidine-2(1H)-thiones, respectively, in the presence of p-toluenesulfonic acid (PTSA) in acetonitrile. However when cyclohexanone was replaced by acetyl acetone and alpha-tetralone gave the corresponding 1-(3-methyl-5,7-diaryl-5H-thiazolo[3,2-a]pyrimidin-2-yl)ethan-1-one hydrobromide and 9,11-diaryl-6,11-dihydro-5H-naphtho[1',2':4,5]thiazolo[3,2-a]pyrimidine hydrobromide derivatives, respectively. The significant features of this method are novel, simple, inexpensive experimental procedure, short reaction time, and good yield. The some of the synthesized compounds were evaluated for cytotoxic activity against human lung adenocarcinoma cell line (A549), human breast carcinoma cell line (MCF-7), human cervical cancer cell line (HeLa) and human neuronal carcinoma cell lines (SKNSH). Tested compounds 5(b-e) showed the excellent anticancer activity against various cell lines. Particularly compound 5c with IC50 value of 2.2 ± 0.6 μM against A549 and compound 5e with IC50 value of 5.6 ± 0.4 μM against HeLa showed best cytotoxic effects. Furthermore, Molecular docking study was performed for some of the synthesized compounds 5(b-e) against topoisomerase-II by using Auto dock method. Docking results of the compounds 5c, 5d, and 5e exhibited higher cytotoxic activity than the standard doxorubicin.
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Affiliation(s)
- Thuraka Sekhar
- Department of Chemistry, Vikrama Simhapuri University, Nellore 524320, India
| | - Pinnu Thriveni
- Department of Chemistry, Vikrama Simhapuri University, Nellore 524320, India.
| | | | - Thathapudi Daveedu
- Department of Biotechnology, Vikrama Simhapuri University, Nellore 524320, India
| | - Kotha Peddanna
- Department of Bio-Chemistry, Sri Venkateswara University, Tirupati 517 502, India
| | - Sri Bhashyam Sainath
- Department of Biotechnology, Vikrama Simhapuri University, Nellore 524320, India
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Li G, Wang Y, Cai L, Zhou L. Screening for genes and subnetworks associated with atypical teratoid/rhabdoid tumors using bioinformatics analysis. Int J Neurosci 2020; 131:319-326. [PMID: 32202192 DOI: 10.1080/00207454.2020.1746306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Objectives: Atypical teratoid/rhabdoid tumors (AT/RTs) are rare, fast-growing lesions of central nervous system and their prognosis is poor. Nowadays, multimodal managements, including surgery, chemotherapy and radiation therapy are advocated; however, low survival rate and severe neurocognitive toxicity of chemotherapy as well as the irreversible long-term sequelae of irradiation in infants and young children with AT/RTs are alarming. The aim of our study is to provide valid biological information for more tailored advance therapy for these lesions.Methods: Gene expression profile of GSE94349 was downloaded from GEO database and was analyzed using limma R package. Function and enrichment analyses of DEGs were performed based on DAVID database. PPI network construction, hub gene selection and module analysis were conducted in Cytoscape software.Results: In this study, 224 up-regulated genes and 572 down-regulated genes were selected as DEGs. The up-regulated genes were mainly enriched in molecular function and cell component, which mainly included protein binding and nucleus, respectively. The down-regulated DEGs were significantly involved in cell component such as plasma membrane and integral component of membrane. Cell cycle and retrograde endocannabinoid signaling were the main KEGG pathway of up and down DEGs, respectively. CDK1, CCNA2, CDC20, TOP2A were identified as hub genes and two significant network modules were also obtained.Conclusions: Our study may help to further understand the molecular characteristics and provide more tailored targets for future treatment of AT/RTs. Hub genes CDK1, CCNA2, CDC20, TOP2A as well as cell cycle signaling pathway may be new more tailored targets for future treatment of AT/RTs.
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Affiliation(s)
- Gaowei Li
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yuelong Wang
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, China
| | - Linjun Cai
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Liangxue Zhou
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Cell Cycle-Dependent Control and Roles of DNA Topoisomerase II. Genes (Basel) 2019; 10:genes10110859. [PMID: 31671531 PMCID: PMC6896119 DOI: 10.3390/genes10110859] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/25/2019] [Accepted: 10/28/2019] [Indexed: 12/13/2022] Open
Abstract
Type II topoisomerases are ubiquitous enzymes in all branches of life that can alter DNA superhelicity and unlink double-stranded DNA segments during processes such as replication and transcription. In cells, type II topoisomerases are particularly useful for their ability to disentangle newly-replicated sister chromosomes. Growing lines of evidence indicate that eukaryotic topoisomerase II (topo II) activity is monitored and regulated throughout the cell cycle. Here, we discuss the various roles of topo II throughout the cell cycle, as well as mechanisms that have been found to govern and/or respond to topo II function and dysfunction. Knowledge of how topo II activity is controlled during cell cycle progression is important for understanding how its misregulation can contribute to genetic instability and how modulatory pathways may be exploited to advance chemotherapeutic development.
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Li J, Wu ZB, Zhang Z, Zha JW, Qu SY, Qi XZ, Wang GX, Ling F. Effects of potential probiotic Bacillus velezensis K2 on growth, immunity and resistance to Vibrio harveyi infection of hybrid grouper (Epinephelus lanceolatus♂ × E. fuscoguttatus♀). FISH & SHELLFISH IMMUNOLOGY 2019; 93:1047-1055. [PMID: 31425831 DOI: 10.1016/j.fsi.2019.08.047] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/13/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
Nowadays, there is no suitable treatment for vibriosis in groupers. So an eco-efficient and environmentally friendly treatment is necessary for the grouper industry. Probiotic-feeding has been a promising strategy to control the bacterial pathogens in aquaculture. A new Bacillus velezensis strain named K2 was isolated from the intestinal tract of healthy grouper, and exhibited wide antimicrobial spectrum of against fish pathogens, including Vibrio harveyi, Vibrio alginolyticus, Aeromonas hydrophila, Aeromonas veronii, Aeromonas caviae, Enterococcus casseliflavus and Lactococcus garvieae. Moreover, results of the safety of B. velezensis K2 showed that intraperitoneal injection of K2 in healthy grouper did not cause any pathological abnormality or death, indicating this bacteria could be considered as a candidate probiotic in aquaculture. Groupers were fed with the diets containing 1 × 107 cfu/g of B. velezensis K2 for 4 weeks. Various immune parameters were examined at 1, 2, 3, and 4 weeks of post-feeding. Results showed that diets supplemented with K2 significantly increased serum acid phosphatase (ACP) activity (P < 0.05). Results of the mRNA expression of immune-related genes in the head kidney of hybrid grouper showed that the expression of lysozyme gene was significantly upregulated after 1 and 2 weeks of feeding (P < 0.05). A significant up-regulation of the expression of piscidin, IgM and MyD88 were detected at day 21, whereas the TLR3 and TLR5 showed lower expression compared to the controls during 21 days, and a significant decrease of TLR3 gene was found at day 28 (P < 0.05). After challenge with V. harveyi, the survival rate of fish administrated with the strain K2 for 28 days was signifiacantly higher than the controls without this strain (P < 0.05). These results collectively suggest that B. velezensis K2 is a potential probiotic species to improve health status and disease resistance and can be developed as a probiotic agent in grouper industry.
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Affiliation(s)
- Jing Li
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Zhi-Bin Wu
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Zhao Zhang
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Ji-Wei Zha
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Shen-Ye Qu
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Xiao-Zhou Qi
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Gao-Xue Wang
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China.
| | - Fei Ling
- Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China.
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Nandeesh BN, Naskar S, Shashtri AH, Arivazhagan A, Santosh V. Recurrent Glioblastomas Exhibit Higher Expression of Biomarkers with Stem-like Properties. J Neurosci Rural Pract 2019; 9:86-91. [PMID: 29456350 PMCID: PMC5812166 DOI: 10.4103/jnrp.jnrp_417_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background Despite advances in the treatment of glioblastoma (GBM), the prognosis of patients continues to remain dismal. This unfavorable prognosis is mainly attributed to the tumor's propensity for progression and recurrence, which in turn is due to the highly aggressive nature of the persisting GBM cells that actively egress from the main tumor mass into the surrounding normal brain tissue. Such a recurrent tumor described to have a more malignant potential is highly invasive and resistant to current therapies, probably due to increased stemness and preferential selection of therapy-resistant clones of tumor cells. However, there is a paucity of literature on the expression of biomarkers in the recurrent GBM tumors that could have a role in conferring this aggressiveness. Aim To identify the differences in the expression pattern of selected biomarkers in paired tissue samples of GBM. Material and Methods A retrospective study on 30 paired samples of GBM (newly diagnosed/primary and recurrent) archived in the Department of Neuropathology, NIMHANS (2006-2009), was carried out. After obtaining clinical and demographic details, tumors were characterized histomorphologically and immunohistochemically on formalin-fixed paraffin-embedded tissues with reference to expression of biomarkers such as p53, epidermal growth factor receptor (EGFR), insulin-like growth factor binding protein 3 (IGFBP-3), sex determining region Y-box 2 (SOX2), and topoisomerase 2 A (Top2A). The results were statistically analyzed. Results It was observed that while p53 and IGFBP-3 expression remained unaltered in paired samples, a significant increase in the expression of EGFR (P < 0.01) was noted in the recurrent tumors. Among the other biomarkers, SOX2 expression was higher in the recurrent tumors when compared to the primary tumors (P < 0.01). Conversely, the expression of Top2A was reduced in recurrent tumors (P = 0.05). Mild elevation in the expression of IGFBP-3 was observed in recurrent tumors but was not statistically significant. Conclusion A significant increase in the expression of SOX2 in recurrent tumors probably indicates the presence of undifferentiated cells with stem-like properties in these tumors. EGFR is known to mediate SOX2 expression thereby resulting in stemness of the glioma cancer cells, which could further explain its overexpression in recurrent GBMs. Furthermore, a decreased expression of TOP2A observed in the recurrent tumors could probably be due to reduction in chemosensitivity to temozolomide, which has been shown in earlier studies. We also noted that p53 expression remained unaltered in the recurrent tumors when compared to the primary, suggesting the absence of preferential clonal expansion of p53 mutant cells following exposure to radiochemotherapy. Our study reiterates the fact that GBM recurrences are associated with molecular alterations that probably contribute to radiochemoresistance, increased invasiveness, therapeutic efficacy, and stemness.
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Affiliation(s)
- B N Nandeesh
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sharmistha Naskar
- Department of Clinical Neurosciences, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Arun H Shashtri
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - A Arivazhagan
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Vani Santosh
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Chelliah R, Wei S, Park BJ, Rubab M, Banan-Mwine Dalirii E, Barathikannan K, Jin YG, Oh DH. Whole genome sequence of Bacillus thuringiensis ATCC 10792 and improved discrimination of Bacillus thuringiensis from Bacillus cereus group based on novel biomarkers. Microb Pathog 2019; 129:284-297. [DOI: 10.1016/j.micpath.2019.02.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/08/2019] [Accepted: 02/08/2019] [Indexed: 11/17/2022]
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Liu T, Zhang H, Yi S, Gu L, Zhou M. Mutual regulation of MDM4 and TOP2A in cancer cell proliferation. Mol Oncol 2019; 13:1047-1058. [PMID: 30672125 PMCID: PMC6487731 DOI: 10.1002/1878-0261.12457] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 01/07/2019] [Accepted: 01/07/2019] [Indexed: 01/28/2023] Open
Abstract
MDM4 and topoisomerase IIα (TOP2A) are overexpressed in various human cancers. MDM4 acts as an oncoprotein which promotes cancer progression by inhibiting tumor suppressor p53. As a DNA replication- and cell division-regulating enzyme, TOP2A is the main target of many anticancer therapy regimens; however, the exact role of TOP2A in cancer remains elusive. Herein, we report that MDM4 and TOP2A bind to each other and are mutually upregulated at the post-translational level, leading to TOP2A protein stabilization, inhibition of p53, and increased tumor-cell proliferation. We demonstrate that the C-terminal region (CTR) of TOP2A binds to a unique sequence (residues: 188-238) of MDM4, which contains an auto-inhibitory segment regulating the MDM4-p53 interaction. TOP2A binding in turn activates MDM4 for p53 binding, resulting in enhanced inhibition of p53 and cancer cell proliferation. Conversely, binding of the MDM4 sequence to the CTR of TOP2A stabilizes TOP2A protein, leading to increased TOP2A protein expression. These results reveal novel functions of MDM4 and TOP2A as well as their interactions in oncogenesis, suggesting that inhibition of the MDM4-TOP2A interaction may represent a novel strategy in specifically and simultaneously targeting TOP2A and MDM4 for cancer treatment.
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Affiliation(s)
- Tao Liu
- Department of Pediatrics and Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Hailong Zhang
- Department of Pediatrics and Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Sha Yi
- Department of Pediatrics and Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Lubing Gu
- Department of Pediatrics and Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Muxiang Zhou
- Department of Pediatrics and Aflac Cancer and Blood Disorders Center, Emory University School of Medicine, Atlanta, GA, USA
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Naik SD, Hosamani KM. Design and Synthesis of Novel C4-Linked Substituted 2H-Chromen-2-one-hypoxanthine Hybrids as Potential Antimicrobial Agents: An Approach to Molecular Docking Studies. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Soniya D. Naik
- Department of Studies in Chemistry; Karnatak University; Dharwad 580003 India
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Wu X, Peng L, Zhang Y, Chen S, Lei Q, Li G, Zhang C. Identification of Key Genes and Pathways in Cervical Cancer by Bioinformatics Analysis. Int J Med Sci 2019; 16:800-812. [PMID: 31337953 PMCID: PMC6643108 DOI: 10.7150/ijms.34172] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 05/06/2019] [Indexed: 02/06/2023] Open
Abstract
Cervical cancer is a common malignant tumour of the female reproductive system that seriously threatens the health of women. The aims of this study were to identify key genes and pathways and to illuminate new molecular mechanisms underlying cervical cancer. Altogether, 1829 DEGs were identified, including 794 significantly down-regulated DEGs and 1035 significantly up-regulated DEGs. GO analysis suggested that the up-regulated DEGs were mainly enriched in mitotic cell cycle processes, including DNA replication, organelle fission, chromosome segregation and cell cycle phase transition, and that the down-regulated DEGs were primarily enriched in development and differentiation processes, such as tissue development, epidermis development, skin development, keratinocyte differentiation, epidermal cell differentiation and epithelial cell differentiation. KEGG pathway analysis showed that the DEGs were significantly enriched in cell cycle, DNA replication, the p53 signalling pathway, pathways in cancer and oocyte meiosis. The top 9 hub genes with a high degree of connectivity (over 72 in the PPI network) were down-regulated TSPO, CCND1, and FOS and up-regulated CDK1, TOP2A, CCNB1, PCNA, BIRC5 and MAD2L1. Module analysis indicated that the top 3 modules were significantly enriched in mitotic cell cycle, DNA replication and regulation of cell cycle (P < 0.01). The heat map based on TCGA database preliminarily demonstrated the expression change of the key genes in cervical cancer. GSEA results were basically coincident with the front enrichment analysis results. By comprehensive analysis, we confirmed that cell cycle was a key biological process and a critical driver in cervical cancer. In conclusion, this study identified DEGs and screened the key genes and pathways closely related to cervical cancer by bioinformatics analysis, simultaneously deepening our understanding of the molecular mechanisms underlying the occurrence and progression of cervical cancer. These results might hold promise for finding potential therapeutic targets of cervical cancer.
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Affiliation(s)
- Xuan Wu
- Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha 410078, P.R. China.,Cancer Research Institute, Central South University, Changsha, P.R. China
| | - Li Peng
- Guangdong Province Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Research Center of Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Yaqin Zhang
- Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha 410078, P.R. China.,Cancer Research Institute, Central South University, Changsha, P.R. China
| | - Shilian Chen
- Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha 410078, P.R. China.,Cancer Research Institute, Central South University, Changsha, P.R. China
| | - Qian Lei
- Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha 410078, P.R. China.,Cancer Research Institute, Central South University, Changsha, P.R. China
| | - Guancheng Li
- Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha 410078, P.R. China.,Cancer Research Institute, Central South University, Changsha, P.R. China
| | - Chaoyang Zhang
- Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and the Key Laboratory of Carcinogenesis and Cancer Invasion of Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha 410078, P.R. China.,Division of Functional Genome Analysis, German Cancer Research Centre (DKFZ), Heidelberg, Germany
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Hevener K, Verstak TA, Lutat KE, Riggsbee DL, Mooney JW. Recent developments in topoisomerase-targeted cancer chemotherapy. Acta Pharm Sin B 2018; 8:844-861. [PMID: 30505655 PMCID: PMC6251812 DOI: 10.1016/j.apsb.2018.07.008] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 07/18/2018] [Accepted: 07/18/2018] [Indexed: 12/17/2022] Open
Abstract
The DNA topoisomerase enzymes are essential to cell function and are found ubiquitously in all domains of life. The various topoisomerase enzymes perform a wide range of functions related to the maintenance of DNA topology during DNA replication, and transcription are the targets of a wide range of antimicrobial and cancer chemotherapeutic agents. Natural product-derived agents, such as the camptothecin, anthracycline, and podophyllotoxin drugs, have seen broad use in the treatment of many types of cancer. Selective targeting of the topoisomerase enzymes for cancer treatment continues to be a highly active area of basic and clinical research. The focus of this review will be to summarize the current state of the art with respect to clinically used topoisomerase inhibitors for targeted cancer treatment and to discuss the pharmacology and chemistry of promising new topoisomerase inhibitors in clinical and pre-clinical development.
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Affiliation(s)
- KirkE. Hevener
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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Bobustuc GC, Kassam AB, Rovin RA, Jeudy S, Smith JS, Isley B, Singh M, Paranjpe A, Srivenugopal KS, Konduri SD. MGMT inhibition in ER positive breast cancer leads to CDC2, TOP2A, AURKB, CDC20, KIF20A, Cyclin A2, Cyclin B2, Cyclin D1, ERα and Survivin inhibition and enhances response to temozolomide. Oncotarget 2018; 9:29727-29742. [PMID: 30038716 PMCID: PMC6049872 DOI: 10.18632/oncotarget.25696] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 06/13/2018] [Indexed: 12/31/2022] Open
Abstract
The DNA damage repair enzyme, O6-methylguanine DNA methyltransferase (MGMT) is overexpressed in breast cancer, correlating directly with estrogen receptor (ER) expression and function. In ER negative breast cancer the MGMT promoter is frequently methylated. In ER positive breast cancer MGMT is upregulated and modulates ER function. Here, we evaluate MGMT's role in control of other clinically relevant targets involved in cell cycle regulation during breast cancer oncogenesis. We show that O6-benzylguanine (BG), an MGMT inhibitor decreases CDC2, CDC20, TOP2A, AURKB, KIF20A, cyclin B2, A2, D1, ERα and survivin and induces c-PARP and p21 and sensitizes ER positive breast cancer to temozolomide (TMZ). Further, siRNA inhibition of MGMT inhibits CDC2, TOP2A, AURKB, KIF20A, Cyclin B2, A2 and survivin and induces p21. Combination of BG+TMZ decreases CDC2, CDC20, TOP2A, AURKB, KIF20A, Cyclin A2, B2, D1, ERα and survivin. Temozolomide alone inhibits MGMT expression in a dose and time dependent manner and increases p21 and cytochrome c. Temozolomide inhibits transcription of TOP2A, AURKB, KIF20A and does not have any effect on CDC2 and CDC20 and induces p21. BG+/-TMZ inhibits breast cancer growth. In our orthotopic ER positive breast cancer xenografts, BG+/-TMZ decreases ki-67, CDC2, CDC20, TOP2A, AURKB and induces p21 expression. In the same model, BG+TMZ combination inhibits breast tumor growth in vivo compared to single agent (TMZ or BG) or control. Our results show that MGMT inhibition is relevant for inhibition of multiple downstream targets involved in tumorigenesis. We also show that MGMT inhibition increases ER positive breast cancer sensitivity to alkylator based chemotherapy.
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Affiliation(s)
- George C. Bobustuc
- Aurora Research Institute, Milwaukee, WI, USA
- Aurora Neurosciences Innovation Institute, Milwaukee, WI, USA
| | - Amin B. Kassam
- Aurora Research Institute, Milwaukee, WI, USA
- Aurora Neurosciences Innovation Institute, Milwaukee, WI, USA
| | - Richard A. Rovin
- Aurora Research Institute, Milwaukee, WI, USA
- Aurora Neurosciences Innovation Institute, Milwaukee, WI, USA
| | | | | | | | - Maharaj Singh
- Aurora Research Institute, Milwaukee, WI, USA
- Aurora Neurosciences Innovation Institute, Milwaukee, WI, USA
| | - Ameya Paranjpe
- Texas Tech University Health Sciences Center, Amarillo, TX, USA
| | | | - Santhi D. Konduri
- Aurora Research Institute, Milwaukee, WI, USA
- Aurora Neurosciences Innovation Institute, Milwaukee, WI, USA
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Ren L, Liu J, Gou K, Xing C. Copy number variation and high expression of DNA topoisomerase II alpha predict worse prognosis of cancer: a meta-analysis. J Cancer 2018; 9:2082-2092. [PMID: 29937926 PMCID: PMC6010676 DOI: 10.7150/jca.23681] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 03/26/2018] [Indexed: 12/20/2022] Open
Abstract
Background: Increasing numbers of literatures have investigated the association between TOP2A and cancer prognosis. But the results of the relationship between the two were inconclusive. The aim of this meta-analysis was to elucidate whether TOP2A could predict prognosis of cancer. Materials and Methods: A systematically searching for potentially valuable literature was conducted through electronic databases containing PubMed and Web of Science. Hazard Ratio (HR) and their 95% confidence interval (CI) were used to assess the strength of association between TOP2A and cancer prognosis. Results: Finally twenty-five studies were included in this meta-analysis. High expression of TOP2A was associated with shorter disease free survival (DFS) of cancer prognosis compared with low expression of TOP2A (HR= 1.36, 95% CI= 1.18-1.57, P<0.001). Amplification of TOP2A gene showed no significant association with overall survival (OS), disease free survival (DFS) or relapse free survival (RFS) compared with non-amplification of TOP2A (OS: HR= 0.96, 95%CI= 0.75-1.22, P= 0.735; DFS: HR= 0.93, 95%CI= 0.70-1.23, P= 0.621; RFS: HR= 0.97, 95%CI= 0.71-1.34, P= 0.867). In the subgroup of regions, TOP2A amplification was associated with longer overall survival (HR= 0.66, 95%CI= 0.46-0.96, P= 0.029) in Australia. Alteration (amplification or deletion) of TOP2A gene demonstrated shorter survival according to OS and RFS compared with those with normal TOP2A status (OS: HR= 1.37, 95%CI= 1.22-1.55, P<0.001; RFS: HR= 1.26, 95%CI= 1.12-1.41, P<0.001). Conclusion: High TOP2A expression suggested significant relationship with worse cancer prognosis. Alteration (amplification or deletion) of TOP2A gene was also significantly related to shorter survival of cancer patients. Therefore, TOP2A might be used as an indicator for poor prognosis of cancer in the future.
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Affiliation(s)
| | | | | | - Chengzhong Xing
- Department of anorectal surgery, the First Affiliated Hospital of China Medical University
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Savanur HM, Naik KN, Ganapathi SM, Kim KM, Kalkhambkar RG. Click Chemistry Inspired Design, Synthesis and Molecular Docking Studies of Coumarin, Quinolinone Linked 1,2,3‐Triazoles as Promising Anti‐Microbial Agents. ChemistrySelect 2018. [DOI: 10.1002/slct.201800319] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hemantkumar M. Savanur
- Department of ChemistryKarnatak University's Karnatak Science College Dharwad Karnatak 580001 India
| | - Krishna N. Naik
- Department of ChemistryKarnatak University's Karnatak Science College Dharwad Karnatak 580001 India
| | - Shailaja M. Ganapathi
- Department of BiotechnologyKarnatak University'sKarnatak Science College Dharwad. Karnatak 580001 India
| | - Kang Min Kim
- Department of Pharmaceutical science and technologyKyungsung University Busan 608–736 Korea
| | - Rajesh G. Kalkhambkar
- Department of ChemistryKarnatak University's Karnatak Science College Dharwad Karnatak 580001 India
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43
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Wei S, Chelliah R, Park BJ, Park JH, Forghani F, Park YS, Cho MS, Park DS, Oh DH. Molecular discrimination of Bacillus cereus group species in foods (lettuce, spinach, and kimbap) using quantitative real-time PCR targeting groEL and gyrB. Microb Pathog 2018; 115:312-320. [PMID: 29306007 DOI: 10.1016/j.micpath.2017.12.079] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 12/29/2017] [Accepted: 12/30/2017] [Indexed: 01/06/2023]
Abstract
The aim of the study was to identify and evaluate specific biomarkers to differentiate within Bacillus cereus group species from contaminated food samples with the use of real-time PCR. A total of 120 strains, comprising of 28 reference, 2 type, 78 wild strains of B. cereus and B. thuringiensis along with 12 strains representing 2 bacterial groups - B. mycoides, B. pseudomycoides, B. weihenstephanensis (B. cereus group); B. amyloliquefaciens, B. subtilis, Enterococcus faecalis, Escherichia coli, Listeria monocytogenes, Micrococcus luteus, Salmonella enterica, Staphylococcus aureus, Streptococcus pyogenes (non-Bacillus sp.) were identified by applying valid biomarkers (groEL and gyrB). In addition, the presence of B. cereus group was determined in three different artificially contaminated vegetable samples (lettuce, spinach, and kimbap), using prominent biomarkers targeting on chaperonin protein (GroEL) and topoisomerase enzyme protein (gyrB). Direct analysis of samples revealed the specificity towards identification and characterization of the B. cereus group among wild, reference and type strains and the type strain inoculated in vegetables. Our results demonstrated two existing biomarkers groEL and gyrB with a high specificity of 98% and 96% respectively to analyze the total B. cereus group. Further, we also reported the detection limit of groEL and gyrB in food samples was 3.5 and 3.7 log CFU/g respectively. Thus, the developed real-time PCR approach can be a reliable and effective tool for the identification of B. cereus group strains present in environment and food samples. This does not require band isolation, re-amplification, sequencing or sequence identification, thus reducing the time and cost of analysis.
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Affiliation(s)
- Shuai Wei
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Ramachandran Chelliah
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Byung-Jae Park
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Joong-Hyun Park
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Fereidoun Forghani
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Youn-Seo Park
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Min-Seok Cho
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Rural Development Administration, Jeonju, 54874, Republic of Korea
| | - Dong-Suk Park
- Department of Agricultural Biotechnology, National Academy of Agricultural Science, Rural Development Administration, Jeonju, 54874, Republic of Korea
| | - Deog-Hwan Oh
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea.
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44
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Nastasă C, Vodnar DC, Ionuţ I, Stana A, Benedec D, Tamaian R, Oniga O, Tiperciuc B. Antibacterial Evaluation and Virtual Screening of New Thiazolyl-Triazole Schiff Bases as Potential DNA-Gyrase Inhibitors. Int J Mol Sci 2018; 19:ijms19010222. [PMID: 29324679 PMCID: PMC5796171 DOI: 10.3390/ijms19010222] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/21/2017] [Accepted: 01/09/2018] [Indexed: 01/18/2023] Open
Abstract
The global spread of bacterial resistance to drugs used in therapy requires new potent and safe antimicrobial agents. DNA gyrases represent important targets in drug discovery. Schiff bases, thiazole, and triazole derivatives are considered key scaffolds in medicinal chemistry. Fifteen thiazolyl-triazole Schiff bases were evaluated for their antibacterial activity, measuring the growth inhibition zone diameter, the minimum inhibitory concentration (MIC), and the minimum bactericidal concentration (MBC), against Gram-positive (Staphylococcus aureus, Listeria monocytogenes) and Gram-negative (Escherichia coli, Salmonella typhimurium, Pseudomonas aeruginosa) bacteria. The inhibition of S. aureus and S. typhimurium was modest. Compounds B1, B2, and B9 showed a similar effect as ciprofloxacin, the antimicrobial reference, against L. monocytogenes. B10 displayed a better effect. Derivatives B1, B5–7, B9, and B11–15 expressed MIC values lower than the reference, against L. monocytogenes. B5, B6, and B11–15 strongly inhibited the growth of P. aeruginosa. All compounds were subjected to an in silico screening of the ADMET (absorption, distribution, metabolism, elimination, toxicity) properties. Molecular docking was performed on the gyrA and gyrB from L. monocytogenes. The virtual screening concluded that thiazolyl-triazole Schiff base B8 is the best drug-like candidate, satisfying requirements for both safety and efficacy, being more potent against the bacterial gyrA than ciprofloxacin.
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Affiliation(s)
- Cristina Nastasă
- Department of Pharmaceutical Chemistry, "Iuliu Haţieganu" University of Medicine and Pharmacy, 41 Victor Babeş Street, RO-400012 Cluj-Napoca, Romania.
| | - Dan C Vodnar
- Department of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5 Mănăştur Street, RO-400372 Cluj-Napoca, Romania.
| | - Ioana Ionuţ
- Department of Pharmaceutical Chemistry, "Iuliu Haţieganu" University of Medicine and Pharmacy, 41 Victor Babeş Street, RO-400012 Cluj-Napoca, Romania.
| | - Anca Stana
- Department of Pharmaceutical Chemistry, "Iuliu Haţieganu" University of Medicine and Pharmacy, 41 Victor Babeş Street, RO-400012 Cluj-Napoca, Romania.
| | - Daniela Benedec
- Department of Pharmacognosy, "Iuliu Haţieganu" University of Medicine and Pharmacy, 12 Ion Creangă Street, RO-400010 Cluj-Napoca, Romania.
| | - Radu Tamaian
- National Institute for Research and Development for Cryogenic and Isotopic Technologies, 4th Uzinei Street, RO-240050 Râmnicu Vâlcea, Romania.
- SC Biotech Corp SRL, 4th Uzinei Street, RO-240050 Râmnicu Vâlcea, Romania.
| | - Ovidiu Oniga
- Department of Pharmaceutical Chemistry, "Iuliu Haţieganu" University of Medicine and Pharmacy, 41 Victor Babeş Street, RO-400012 Cluj-Napoca, Romania.
| | - Brînduşa Tiperciuc
- Department of Pharmaceutical Chemistry, "Iuliu Haţieganu" University of Medicine and Pharmacy, 41 Victor Babeş Street, RO-400012 Cluj-Napoca, Romania.
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45
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Cao Y, Jiang Z, Wang S, Zhang H, Jiang Y, Lv L. Prediction of long-term survival rates in patients undergoing curative resection for solitary hepatocellular carcinoma. Oncol Lett 2017; 15:2574-2582. [PMID: 29434976 DOI: 10.3892/ol.2017.7612] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 11/02/2017] [Indexed: 12/13/2022] Open
Abstract
The present study developed a novel laboratory-based algorithm to predict long-term survival rates in patients undergoing curative resection for solitary hepatitis B virus (HBV)-related hepatocellular carcinoma (HCC). The present study included 426 patients with solitary HBV-related HCC who underwent surgery for primary tumors at a single center between 2003 and 2012. Demographic characteristics, laboratory analysis, clinical pathology and immunohistochemistry of topoisomerase II-a and Ki67 were analyzed. A simple prognostic risk calculator was developed using regression coefficients from multivariate models. A prognostic risk calculator incorporating tumor encapsulation, neutrophil-to-lymphocyte ratio, vascular invasion, α-fetoprotein level, Edmondson-Steiner classification, Topo II-α, prognostic nutritional index and Child-Pugh grade was constructed. The prognostic model demonstrated good discrimination with a C-index prior to adjustment of 0.81 (95% confidence interval: 0.78-0.84) and a bootstrap-corrected C-index of 0.81. Kaplan-Meier curves demonstrated that the probabilities of overall survival rates in the low-risk group were increased compared with those in the high-risk group. The areas under the receiver operating characteristic curve using the method were greater compared with those under the 7th Tumor-Node-Metastasis system and Cancer of the Liver Italian Program scoring system [0.83 vs. 0.62 and 0.77 (P<0.001), respectively]. The simple prognostic model of the present study accurately predicted survival rates in patients. Such a prognostic risk calculator for staging patients undergoing curative resection for solitary HBV-related HCC facilitates clinical surveillance and therapy.
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Affiliation(s)
- Yi Cao
- Department of Hepatobiliary Surgery, Fuzhou General Hospital (Dongfang Hospital), Fuzhou, Fujian 350025, P.R. China.,Department of Hepatobiliary Surgery Fuzong Clinical College of Fujian Medical University, Fuzhou, Fujian 350004, P.R. China
| | - Zhelong Jiang
- Department of Hepatobiliary Surgery, Fuzhou General Hospital (Dongfang Hospital), Fuzhou, Fujian 350025, P.R. China
| | - Shaohu Wang
- Department of Hepatobiliary Surgery, Fuzhou General Hospital (Dongfang Hospital), Fuzhou, Fujian 350025, P.R. China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Haoyang Zhang
- School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong 510000, P.R. China
| | - Yi Jiang
- Department of Hepatobiliary Surgery, Fuzhou General Hospital (Dongfang Hospital), Fuzhou, Fujian 350025, P.R. China.,Department of Hepatobiliary Surgery Fuzong Clinical College of Fujian Medical University, Fuzhou, Fujian 350004, P.R. China.,Department of Hepatobiliary Surgery, Dongfang Hospital of Xiamen University, Fuzhou, Fujian 350025, P.R. China
| | - Lizhi Lv
- Department of Hepatobiliary Surgery, Fuzhou General Hospital (Dongfang Hospital), Fuzhou, Fujian 350025, P.R. China.,Department of Hepatobiliary Surgery Fuzong Clinical College of Fujian Medical University, Fuzhou, Fujian 350004, P.R. China
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46
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Pham HTT, Maurer B, Prchal-Murphy M, Grausenburger R, Grundschober E, Javaheri T, Nivarthi H, Boersma A, Kolbe T, Elabd M, Halbritter F, Pencik J, Kazemi Z, Grebien F, Hengstschläger M, Kenner L, Kubicek S, Farlik M, Bock C, Valent P, Müller M, Rülicke T, Sexl V, Moriggl R. STAT5BN642H is a driver mutation for T cell neoplasia. J Clin Invest 2017; 128:387-401. [PMID: 29200404 PMCID: PMC5749501 DOI: 10.1172/jci94509] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 10/05/2017] [Indexed: 01/07/2023] Open
Abstract
STAT5B is often mutated in hematopoietic malignancies. The most frequent STAT5B mutation, Asp642His (N642H), has been found in over 90 leukemia and lymphoma patients. Here, we used the Vav1 promoter to generate transgenic mouse models that expressed either human STAT5B or STAT5BN642H in the hematopoietic compartment. While STAT5B-expressing mice lacked a hematopoietic phenotype, the STAT5BN642H-expressing mice rapidly developed T cell neoplasms. Neoplasia manifested as transplantable CD8+ lymphoma or leukemia, indicating that the STAT5BN642H mutation drives cancer development. Persistent and enhanced levels of STAT5BN642H tyrosine phosphorylation in transformed CD8+ T cells led to profound changes in gene expression that were accompanied by alterations in DNA methylation at potential histone methyltransferase EZH2-binding sites. Aurora kinase genes were enriched in STAT5BN642H-expressing CD8+ T cells, which were exquisitely sensitive to JAK and Aurora kinase inhibitors. Together, our data suggest that JAK and Aurora kinase inhibitors should be further explored as potential therapeutics for lymphoma and leukemia patients with the STAT5BN642H mutation who respond poorly to conventional chemotherapy.
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Affiliation(s)
- Ha Thi Thanh Pham
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Barbara Maurer
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Michaela Prchal-Murphy
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Reinhard Grausenburger
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Eva Grundschober
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Tahereh Javaheri
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Harini Nivarthi
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | | | - Thomas Kolbe
- Biomodels Austria (Biat), University of Veterinary Medicine Vienna, Vienna, Austria.,IFA-Tulln, University of Natural Resources and Life Sciences, Tulln, Austria
| | - Mohamed Elabd
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
| | - Florian Halbritter
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Jan Pencik
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
| | - Zahra Kazemi
- Medical University of Vienna, Vienna, Austria.,Center of Physiology and Pharmacology, Vienna, Austria
| | - Florian Grebien
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
| | - Markus Hengstschläger
- Center of Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | - Lukas Kenner
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria.,Unit of Pathology of Laboratory Animals, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Stefan Kubicek
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Matthias Farlik
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Christoph Bock
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Medical University of Vienna, Vienna, Austria.,Max Planck Institute for Informatics, Saarbrücken, Germany
| | - Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, and.,Ludwig Boltzmann-Cluster Oncology, Medical University of Vienna, Vienna, Austria
| | - Mathias Müller
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | | | - Veronika Sexl
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Richard Moriggl
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria.,Medical University of Vienna, Vienna, Austria
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47
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Kozuki T, Chikamori K, Surleac MD, Micluta MA, Petrescu AJ, Norris EJ, Elson P, Hoeltge GA, Grabowski DR, Porter ACG, Ganapathi RN, Ganapathi MK. Roles of the C-terminal domains of topoisomerase IIα and topoisomerase IIβ in regulation of the decatenation checkpoint. Nucleic Acids Res 2017; 45:5995-6010. [PMID: 28472494 PMCID: PMC5449615 DOI: 10.1093/nar/gkx325] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 04/14/2017] [Indexed: 12/13/2022] Open
Abstract
Topoisomerase (topo) IIα and IIβ maintain genome stability and are targets for anti-tumor drugs. In this study, we demonstrate that the decatenation checkpoint is regulated, not only by topo IIα, as previously reported, but also by topo IIβ. The decatenation checkpoint is most efficient when both isoforms are present. Regulation of this checkpoint and sensitivity to topo II-targeted drugs is influenced by the C-terminal domain (CTD) of the topo II isoforms and by a conserved non-catalytic tyrosine, Y640 in topo IIα and Y656 in topo IIβ. Deletion of most of the CTD of topo IIα, while preserving the nuclear localization signal (NLS), enhances the decatenation checkpoint and sensitivity to topo II-targeted drugs. In contrast, deletion of most of the CTD of topo IIβ, while preserving the NLS, and mutation of Y640 in topo IIα and Y656 in topo IIβ inhibits these activities. Structural studies suggest that the differential impact of the CTD on topo IIα and topo IIβ function may be due to differences in CTD charge distribution and differential alignment of the CTD with reference to transport DNA. Together these results suggest that topo IIα and topo IIβ cooperate to maintain genome stability, which may be distinctly modulated by their CTDs.
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Affiliation(s)
- Toshiyuki Kozuki
- Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Kenichi Chikamori
- Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Marius D Surleac
- Department of Bioinformatics, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Marius A Micluta
- Department of Bioinformatics, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Andrei J Petrescu
- Department of Bioinformatics, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Eric J Norris
- Department of Cancer Pharmacology, Levine Cancer Institute, Carolinas HealthCare System, 1021 Morehead Medical Drive, Charlotte, NC 28204, USA
| | - Paul Elson
- Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Gerald A Hoeltge
- Clinical Pathology, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Dale R Grabowski
- Taussig Cancer Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA
| | - Andrew C G Porter
- Imperial College Faculty of Medicine, Hammersmith Hospital, London W10 ONN, UK
| | - Ram N Ganapathi
- Department of Cancer Pharmacology, Levine Cancer Institute, Carolinas HealthCare System, 1021 Morehead Medical Drive, Charlotte, NC 28204, USA
| | - Mahrukh K Ganapathi
- Department of Cancer Pharmacology, Levine Cancer Institute, Carolinas HealthCare System, 1021 Morehead Medical Drive, Charlotte, NC 28204, USA
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48
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Dai J, Bing Z, Zhang Y, Li Q, Niu L, Liang W, Yuan G, Duan L, Yin H, Pan Y. Integrated mRNAseq and microRNAseq data analysis for grade III gliomas. Mol Med Rep 2017; 16:7468-7478. [PMID: 28944855 PMCID: PMC5865882 DOI: 10.3892/mmr.2017.7545] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 07/06/2017] [Indexed: 12/21/2022] Open
Abstract
The World Health Organization classification distinguishes four grades for gliomas. Grade III gliomas, which are brain malignant brain tumors with variable biological behavior and propensity, have been not widely investigated. The objective of the present study was to identify specific gene modules and valuable hubs associated with gliomagenesis and molecular signatures to assist in determining grade III glioma prognosis. mRNAseq and micro (mi)RNAseq data were used to construct a co-expression network of gliomas using weight gene co-expression network analysis, and revealed the prognostic molecular signature of grade III gliomas. The differently expressed miRNAs and mRNAs were identified. A total of 37 mRNAs and 10 miRNAs were identified, which were closely associated with the survival rates of patients with grade III glioma. To further understand the tumorigenesis, Cytoscape software was used to construct a network containing these differently expressed molecules. The result suggested that both the downregulated genes and upregulated genes are vital in the process of glioma deterioration, and certain genes are closely associated with clinical prognosis.
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Affiliation(s)
- Junqiang Dai
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Zhitong Bing
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, P.R. China
| | - Yinian Zhang
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Qiao Li
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Liang Niu
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Wentao Liang
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Guoqiang Yuan
- Institute of Neurology, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Lei Duan
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Hang Yin
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
| | - Yawen Pan
- Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, P.R. China
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49
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The selective effect of glycyrrhizin and glycyrrhetinic acid on topoisomerase IIα and apoptosis in combination with etoposide on triple negative breast cancer MDA-MB-231 cells. Eur J Pharmacol 2017; 809:87-97. [DOI: 10.1016/j.ejphar.2017.05.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 05/11/2017] [Accepted: 05/11/2017] [Indexed: 11/27/2022]
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50
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Singh LR, Avula SR, Raj S, Srivastava A, Palnati GR, Tripathi CKM, Pasupuleti M, Sashidhara KV. Coumarin–benzimidazole hybrids as a potent antimicrobial agent: synthesis and biological elevation. J Antibiot (Tokyo) 2017. [DOI: 10.1038/ja.2017.70] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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