1
|
Bahrami K, Lee E, Morse B, Lanier OL, Peppas NA. Design of nanoparticle-based systems for the systemic delivery of chemotherapeutics: Alternative potential routes via sublingual and buccal administration for systemic drug delivery. Drug Deliv Transl Res 2024; 14:1173-1188. [PMID: 38151650 DOI: 10.1007/s13346-023-01493-7] [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] [Accepted: 12/06/2023] [Indexed: 12/29/2023]
Abstract
Conventional therapeutic approaches for cancer generally involve chemo- and radiation therapies that often exhibit low efficacy and induce toxic side effects. Recent years have seen significant advancements in the use of protein biologics as a promising alternative treatment option. Nanotechnology-based systems have shown great potential in providing more specific and targeted cancer treatments, thus improving upon many of the limitations associated with current treatments. The unique properties of biomaterial carriers at the nanoscale have been proven to enhance both the performance of the incorporated therapeutic agent and tumor targeting; however, many of these systems are delivered intravenously, which can cause hazardous side effects. Buccal and sublingual delivery systems offer an alternative route for more efficient delivery of nanotechnologies and drug absorption into systemic circulation. This review concentrates on emerging buccal and sublingual nanoparticle delivery systems for chemo- and protein therapeutics, their development, efficacy, and potential areas of improvement in the field. Several factors contribute to the development of effective buccal or sublingual nanoparticle delivery systems, including targeting efficiency of the nanoparticulate carriers, drug release, and carrier biocompatibility. Furthermore, the potential utilization of buccal and sublingual multilayer films combined with nanoparticle chemotherapeutic systems is outlined as a future avenue for in vitro and in vivo research.
Collapse
Affiliation(s)
- Kiana Bahrami
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
- Institute of Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA
- Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, NY, USA
| | - Elaine Lee
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
- Institute of Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA
- School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Brinkley Morse
- Institute of Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA
- Department of Neurology, Dell Medical School, University of Texas, Austin, USA
| | - Olivia L Lanier
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
- Institute of Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA
| | - Nicholas A Peppas
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA.
- Institute of Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA.
- Department of Chemical Engineering, University of Texas at Austin, Austin, TX, USA.
- Department of Surgery and Perioperative Care, Dell Medical School, University of Texas at Austin, Austin, TX, USA.
- Department of Pediatrics, Dell Medical School, University of Texas at Austin, Austin, TX, USA.
| |
Collapse
|
2
|
Selective toxicity of antibacterial agents-still a valid concept or do we miss chances and ignore risks? Infection 2020; 49:29-56. [PMID: 33367978 PMCID: PMC7851017 DOI: 10.1007/s15010-020-01536-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 10/04/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Selective toxicity antibacteribiotics is considered to be due to interactions with targets either being unique to bacteria or being characterized by a dichotomy between pro- and eukaryotic pathways with high affinities of agents to bacterial- rather than eukaryotic targets. However, the theory of selective toxicity oversimplifies the complex modes of action of antibiotics in pro- and eukaryotes. METHODS AND OBJECTIVE This review summarizes data describing multiple modes of action of antibiotics in eukaryotes. RESULTS Aminoglycosides, macrolides, oxazolidinones, chloramphenicol, clindamycin, tetracyclines, glycylcyclines, fluoroquinolones, rifampicin, bedaquillin, ß-lactams inhibited mitochondrial translation either due to binding to mitosomes, inhibition of mitochondrial RNA-polymerase-, topoisomerase 2ß-, ATP-synthesis, transporter activities. Oxazolidinones, tetracyclines, vancomycin, ß-lactams, bacitracin, isoniazid, nitroxoline inhibited matrix-metalloproteinases (MMP) due to chelation with zinc and calcium, whereas fluoroquinols fluoroquinolones and chloramphenicol chelated with these cations, too, but increased MMP activities. MMP-inhibition supported clinical efficacies of ß-lactams and daptomycin in skin-infections, and of macrolides, tetracyclines in respiratory-diseases. Chelation may have contributed to neuroprotection by ß-lactams and fluoroquinolones. Aminoglycosides, macrolides, chloramphenicol, oxazolidins oxazolidinones, tetracyclines caused read-through of premature stop codons. Several additional targets for antibiotics in human cells have been identified like interaction of fluoroquinolones with DNA damage repair in eukaryotes, or inhibition of mucin overproduction by oxazolidinones. CONCLUSION The effects of antibiotics on eukaryotes are due to identical mechanisms as their antibacterial activities because of structural and functional homologies of pro- and eukaryotic targets, so that the effects of antibiotics on mammals are integral parts of their overall mechanisms of action.
Collapse
|
3
|
Smart DJ, Helbling FR, McHugh D, Vanscheeuwijck P. Baseline effects of non-flavored e-liquids in the in vitro micronucleus assay. TOXICOLOGY RESEARCH AND APPLICATION 2019. [DOI: 10.1177/2397847319887904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Electronic nicotine delivery systems (ENDSs; e.g. e-cigarettes) are being developed as potentially reduced-risk alternatives to the continued use of conventional tobacco products. They typically comprise a device that heats an e-liquid to generate inhalable vapor. E-liquids and ENDS-derived vapor have been the focus of toxicological assessment; in particular, their DNA-damaging potential has been investigated with varying outcomes and conclusions. In vitro genetic toxicology assays have formed a part of these assessments. However, they are susceptible to producing misleading or false positive results, especially under extreme conditions. In the present study, we evaluated a series of six neat (non-vaporized) non-flavored e-liquids (NFEL-A to F) in a flow cytometry version of the in vitro micronucleus assay in order to characterize their baseline effects on Chinese hamster ovary cells under hazard identification conditions. The NFELs induced cytotoxicity universally despite differing in propylene glycol (PG), vegetable glycerin (VG), and nicotine content. In addition, significant genotoxic responses were also detected with the PG-predominant e-liquids NFEL-A, D, and F but not with NFEL-B, C, or E, which contained higher proportions of VG. All six NFELs induced extreme cell culture conditions (i.e. increases in pH and osmolality) at the concentrations assessed. They also exhibited nonbiologically relevant effects on the mechanistic endpoints (i.e. cell cycle and phosphorylated histones H2AX and H3). In conclusion, although the PG component of the NFELs drove micronucleus formation in the assay, data on the complementary mechanistic endpoints suggest that this apparent DNA damage is potentially misleading and of negligible biological relevance as a risk for DNA integrity. In future assessments, any adverse changes (such as signatures of micronuclei induction, G2M arrest, and increases in γH2AX) relative to this reference data set might indicate a possible genotoxic hazard and would prompt further investigations for exploring the extent of risk.
Collapse
Affiliation(s)
- Daniel J Smart
- Philip Morris International Research and Development, Philip Morris Products S.A., Neuchâtel, Switzerland
| | - Fabian R Helbling
- Philip Morris International Research and Development, Philip Morris Products S.A., Neuchâtel, Switzerland
| | - Damian McHugh
- Philip Morris International Research and Development, Philip Morris Products S.A., Neuchâtel, Switzerland
| | - Patrick Vanscheeuwijck
- Philip Morris International Research and Development, Philip Morris Products S.A., Neuchâtel, Switzerland
| |
Collapse
|
4
|
Smart DJ, Helbling FR, Verardo M, McHugh D, Vanscheeuwijck P. Mode-of-action analysis of the effects induced by nicotine in the in vitro micronucleus assay. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2019; 60:778-791. [PMID: 31294873 PMCID: PMC6900147 DOI: 10.1002/em.22314] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 06/11/2019] [Accepted: 06/17/2019] [Indexed: 05/02/2023]
Abstract
Nicotine's genotoxic potential has been extensively studied in vitro. While the results of mammalian cell-based studies have inferred that it can potentially damage chromosomes, in general and with few exceptions, adverse DNA effects have been observed primarily at supraphysiological concentrations in nonregulatory assays that provide little information on its mode-of-action (MoA). In this study, a modern-day regulatory genotoxicity assessment was conducted using a flow cytometry-based in vitro micronucleus (MN) assay, Good Laboratory Practice study conditions, Chinese hamster ovary cells of known provenance, and acceptance/evaluation criteria from the current OECD Test Guideline 487. Nicotine concentrations up to 3.95 mM had no effect on background levels of DNA damage; however, concentrations above the point-of-departure range of 3.94-4.54 mM induced increases in MN and hypodiploid nuclei, indicating a possible aneugenicity hazard. Follow-up experiments designed to elucidate nicotine's MoA revealed cellular vacuolization, accompanying distortions in microtubules, inhibition of tubulin polymerization, centromere-positive DNA, and multinucleate cells at MN-inducing concentrations. Vacuoles likely originated from acidic cellular compartments (e.g., lysosomes). Remarkably, genotoxicity was suppressed by chemicals that raised the luminal pH of these organelles. Other endpoints (e.g., changes in phosphorylated histones) measured in the study cast doubt on the biological relevance of this apparent genotoxicity. In addition, three major nicotine metabolites, including cotinine, had no MN effects but nornicotine induced a nicotine-like profile. It is possible that nicotine's lysosomotropic properties drive the genotoxicity observed in vitro; however, the potency and mechanistic insights revealed here indicate that it is likely of minimal physiological relevance for nicotine consumers. Environ. Mol. Mutagen. 2019. © 2019 The Authors. Environmental and Molecular Mutagenesis published by Wiley Periodicals, Inc. on behalf of Environmental Mutagen Society.
Collapse
Affiliation(s)
| | | | | | - Damian McHugh
- PMI R&DPhilip Morris Products S.A.NeuchâtelSwitzerland
| | | |
Collapse
|
5
|
Twist and Turn-Topoisomerase Functions in Mitochondrial DNA Maintenance. Int J Mol Sci 2019; 20:ijms20082041. [PMID: 31027213 PMCID: PMC6514783 DOI: 10.3390/ijms20082041] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 04/22/2019] [Accepted: 04/24/2019] [Indexed: 12/15/2022] Open
Abstract
Like any genome, mitochondrial DNA (mtDNA) also requires the action of topoisomerases to resolve topological problems in its maintenance, but for a long time, little was known about mitochondrial topoisomerases. The last years have brought a closer insight into the function of these fascinating enzymes in mtDNA topology regulation, replication, transcription, and segregation. Here, we summarize the current knowledge about mitochondrial topoisomerases, paying special attention to mammalian mitochondrial genome maintenance. We also discuss the open gaps in the existing knowledge of mtDNA topology control and the potential involvement of mitochondrial topoisomerases in human pathologies. While Top1mt, the only exclusively mitochondrial topoisomerase in mammals, has been studied intensively for nearly a decade, only recent studies have shed some light onto the mitochondrial function of Top2β and Top3α, enzymes that are shared between nucleus and mitochondria. Top3α mediates the segregation of freshly replicated mtDNA molecules, and its dysfunction leads to mtDNA aggregation and copy number depletion in patients. Top2β, in contrast, regulates mitochondrial DNA replication and transcription through the alteration of mtDNA topology, a fact that should be acknowledged due to the frequent use of Topoisomerase 2 inhibitors in medical therapy.
Collapse
|
6
|
Motoyama S, Takeiri A, Tanaka K, Harada A, Matsuzaki K, Taketo J, Matsuo S, Fujii E, Mishima M. Advantages of evaluating γH2AX induction in non-clinical drug development. Genes Environ 2018; 40:10. [PMID: 29785231 PMCID: PMC5950202 DOI: 10.1186/s41021-018-0098-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 03/26/2018] [Indexed: 01/17/2023] Open
Abstract
γH2AX, the phosphorylated form of a histone variant H2AX at Ser 139, is already widely used as a biomarker to research the fundamental biology of DNA damage and repair and to assess the risk of environmental chemicals, pollutants, radiation, and so on. It is also beginning to be used in the early non-clinical stage of pharmaceutical drug development as an in vitro tool for screening and for mechanistic studies on genotoxicity. Here, we review the available information on γH2AX-based test systems that can be used to develop drugs and present our own experience of practically applying these systems during the non-clinical phase of drug development. Furthermore, the potential application of γH2AX as a tool for in vivo non-clinical safety studies is also discussed.
Collapse
Affiliation(s)
- Shigeki Motoyama
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Akira Takeiri
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Kenji Tanaka
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Asako Harada
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Kaori Matsuzaki
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Junko Taketo
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Saori Matsuo
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Etsuko Fujii
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| | - Masayuki Mishima
- Research Division, Chugai Pharmaceutical Co., Ltd, Gotemba, Shizuoka Japan
| |
Collapse
|
7
|
Cellular Pharmacokinetics and Intracellular Activity of Gepotidacin against Staphylococcus aureus Isolates with Different Resistance Phenotypes in Models of Cultured Phagocytic Cells. Antimicrob Agents Chemother 2018; 62:AAC.02245-17. [PMID: 29358297 PMCID: PMC5913948 DOI: 10.1128/aac.02245-17] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/09/2018] [Indexed: 11/20/2022] Open
Abstract
Gepotidacin (GSK2140944), a novel triazaacenaphthylene bacterial topoisomerase inhibitor, is currently in clinical development for the treatment of bacterial infections. This study examined in vitro its activity against intracellular Staphylococcus aureus (involved in the persistent character of skin and skin structure infections) by use of a pharmacodynamic model and in relation to cellular pharmacokinetics in phagocytic cells. Compared to oxacillin, vancomycin, linezolid, daptomycin, azithromycin, and moxifloxacin, gepotidacin was (i) more potent intracellularly (the apparent bacteriostatic concentration [Cs] was reached at an extracellular concentration about 0.7× its MIC and was not affected by mechanisms of resistance to the comparators) and (ii) caused a maximal reduction of the intracellular burden (maximum effect) of about −1.6 log10 CFU (which was better than that caused by linezolid, macrolides, and daptomycin and similar to that caused by moxifloxacin). After 24 h of incubation of infected cells with antibiotics at 100× their MIC, the intracellular persisting fraction was <0.1% with moxifloxacin, 0.5% with gepotidacin, and >1% with the other drugs. The accumulation and efflux of gepotidacin in phagocytes were very fast (kin and kout, ∼0.3 min−1; the plateau was reached within 15 min) but modest (intracellular concentration-to-extracellular concentration ratio, ∼1.6). In cell fractionation studies, about 40 to 60% of the drug was recovered in the soluble fraction and ∼40% was associated with lysosomes in uninfected cells. In infected cells, about 20% of cell-associated gepotidacin was recovered in a sedimentable fraction that also contained bacteria. This study highlights the potential for further study of gepotidacin to fight infections where intracellular niches may play a determining role in bacterial persistence and relapses.
Collapse
|
8
|
New 1,4-dihydro[1,8]naphthyridine derivatives as DNA gyrase inhibitors. Bioorg Med Chem Lett 2017; 27:1162-1168. [DOI: 10.1016/j.bmcl.2017.01.073] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/21/2017] [Accepted: 01/24/2017] [Indexed: 01/27/2023]
|
9
|
Páez-Franco JC, González-Sánchez I, Gutiérrez-Nájera NA, Valencia-Turcotte LG, Lira-Rocha A, Cerbón MA, Rodríguez-Sotres R. Proteomic Profiling Reveals the Induction of UPR in Addition to DNA Damage Response in HeLa Cells Treated With the Thiazolo[5,4-b]Quinoline Derivative D3ClP. J Cell Biochem 2016; 118:1164-1173. [DOI: 10.1002/jcb.25753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 09/28/2016] [Indexed: 12/27/2022]
Affiliation(s)
- José Carlos Páez-Franco
- Departamento de Bioquímica; Facultad de Química; Universidad Nacional Autónoma de México; Mexico City Mexico
| | - Ignacio González-Sánchez
- Departamento de Biología; Facultad de Química; Universidad Nacional Autónoma de México; Mexico City Mexico
| | - Nora A. Gutiérrez-Nájera
- Consorcio de Estructura de Proteínas; Instituto Nacional de Medicina Genómica; Mexico City Mexico
| | - Lilián G. Valencia-Turcotte
- Departamento de Bioquímica; Facultad de Química; Universidad Nacional Autónoma de México; Mexico City Mexico
| | - Alfonso Lira-Rocha
- Departamento de Farmacia; Facultad de Química; Universidad Nacional Autónoma de México; Mexico City Mexico
| | - Marco A. Cerbón
- Departamento de Biología; Facultad de Química; Universidad Nacional Autónoma de México; Mexico City Mexico
- Unidad de Investigación en Reproducción Humana; Instituto Nacional de Perinatología; Mexico City Mexico
| | - Rogelio Rodríguez-Sotres
- Departamento de Bioquímica; Facultad de Química; Universidad Nacional Autónoma de México; Mexico City Mexico
| |
Collapse
|
10
|
Pharmacodynamic Profile of GSK2140944 against Methicillin-Resistant Staphylococcus aureus in a Murine Lung Infection Model. Antimicrob Agents Chemother 2015; 59:4956-61. [PMID: 26055376 DOI: 10.1128/aac.00625-15] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 06/01/2015] [Indexed: 12/20/2022] Open
Abstract
GSK2140944 is a novel bacterial type II topoisomerase inhibitor with in vitro activity against key causative respiratory pathogens, including methicillin-resistant Staphylococcus aureus (MRSA). We described the pharmacodynamics of GSK2140944 against MRSA in the neutropenic murine lung infection model. MICs of GSK2140944 were determined by broth microdilution. Plasma and epithelial lining fluid (ELF) pharmacokinetics were evaluated to allow determination of pulmonary distribution. Six MRSA isolates were tested. GSK2140944 doses of 1.56 to 400 mg/kg of body weight every 6 h (q6h) were utilized. Efficacy as the change in log10 CFU at 24 h compared with 0 h controls and the area under the concentration-time curve for the free, unbound fraction of a drug (fAUC)/MIC required for various efficacy endpoints were determined. GSK2140944 MICs were 0.125 to 0.5 mg/liter against the six MRSA isolates. ELF penetration ratios ranged from 1.1 to 1.4. Observed maximal decreases were 1.1 to 3.1 log10 CFU in neutropenic mice. The mean fAUC/MIC ratios required for stasis and 1-log-unit decreases were 59.3 ± 34.6 and 148.4 ± 83.3, respectively. GSK2140944 displayed in vitro and in vivo activity against MRSA. The pharmacodynamic profile of GSK2140944, as determined, supports its further development as a potential treatment option for pulmonary infections, including those caused by MRSA.
Collapse
|
11
|
Poulsen KL, Olivero-Verbel J, Beggs KM, Ganey PE, Roth RA. Trovafloxacin enhances lipopolysaccharide-stimulated production of tumor necrosis factor-α by macrophages: role of the DNA damage response. J Pharmacol Exp Ther 2014; 350:164-70. [PMID: 24817034 DOI: 10.1124/jpet.114.214189] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Trovafloxacin (TVX) is a drug that has caused idiosyncratic, drug-induced liver injury (IDILI) in humans. In a murine model of IDILI, otherwise nontoxic doses of TVX and the inflammagen lipopolysaccharide (LPS) interacted to produce pronounced hepatocellular injury. The liver injury depended on a TVX-induced, small but significant prolongation of tumor necrosis factor-α (TNF) appearance in the plasma. The enhancement of TNF expression by TVX was reproduced in vitro in RAW 264.7 murine macrophages (RAW cells) stimulated with LPS. The current study was designed to identify the molecular target of TVX responsible for this response in RAW cells. An in silico analysis suggested a favorable binding profile of TVX to eukaryotic topoisomerase II-α (TopIIα), and a cell-free assay revealed that TVX inhibited eukaryotic TopIIα activity. Topoisomerase inhibition is known to lead to DNA damage, and TVX increased the DNA damage marker phosphorylated histone 2A.X in RAW cells. Moreover, TVX induced activation of the DNA damage sensor kinases, ataxia telangiectasia mutated (ATM) and Rad3-related (ATR). The ATR inhibitor NU6027 [6-(cyclohexylmethoxy)-5-nitrosopyrimidine-2,4-diamine] prevented the TVX-mediated increases in LPS-induced TNF mRNA and protein release, whereas a selective ATM inhibitor [2-(4-morpholinyl)-6-(1-thianthrenyl)-4H-pyran-4-one (KU55933)] was without effect. TVX prolonged TNF mRNA stability, and this effect was largely attenuated by NU6027. These results suggest that TVX can inhibit eukaryotic topoisomerase, leading to activation of ATR and potentiation of TNF release by macrophages, at least in part through increased mRNA stability. This off-target effect might contribute to the ability of TVX to precipitate IDILI in humans.
Collapse
Affiliation(s)
- Kyle L Poulsen
- Department of Pharmacology & Toxicology, Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan (K.L.P., K.M.B., P.E.G., and R.A.R.); and Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Cartagena, Colombia (J.O.-V.)
| | - Jesus Olivero-Verbel
- Department of Pharmacology & Toxicology, Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan (K.L.P., K.M.B., P.E.G., and R.A.R.); and Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Cartagena, Colombia (J.O.-V.)
| | - Kevin M Beggs
- Department of Pharmacology & Toxicology, Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan (K.L.P., K.M.B., P.E.G., and R.A.R.); and Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Cartagena, Colombia (J.O.-V.)
| | - Patricia E Ganey
- Department of Pharmacology & Toxicology, Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan (K.L.P., K.M.B., P.E.G., and R.A.R.); and Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Cartagena, Colombia (J.O.-V.)
| | - Robert A Roth
- Department of Pharmacology & Toxicology, Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan (K.L.P., K.M.B., P.E.G., and R.A.R.); and Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, University of Cartagena, Cartagena, Colombia (J.O.-V.)
| |
Collapse
|
12
|
Chakravarthy S, Sadagopan S, Nair A, Sukumaran SK. Zebrafish as anIn VivoHigh-Throughput Model for Genotoxicity. Zebrafish 2014; 11:154-66. [DOI: 10.1089/zeb.2013.0924] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
| | - Sathish Sadagopan
- Discovery Biology, Anthem Biosciences Private Limited, Bangalore, India
| | - Ayyappan Nair
- Discovery Biology, Anthem Biosciences Private Limited, Bangalore, India
| | | |
Collapse
|
13
|
Shapiro AB, Austin CA. A high-throughput fluorescence anisotropy-based assay for human topoisomerase II β-catalyzed ATP-dependent supercoiled DNA relaxation. Anal Biochem 2013; 448:23-9. [PMID: 24309019 DOI: 10.1016/j.ab.2013.11.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 11/14/2013] [Accepted: 11/24/2013] [Indexed: 01/29/2023]
Abstract
Because of their essentiality for DNA replication, transcription, and repair, type II topoisomerases are targets for antibacterial and anticancer drugs. There are two type II topoisomerases in humans, topoisomerase IIα (TOP2A) and topoisomerase IIβ (TOP2B), and two in bacteria, gyrase and topoisomerase IV. Inhibition of one or both of the human type II topoisomerases by antibacterial compounds targeting their bacterial counterparts could result in toxicity. In addition, side effects of anticancer drugs targeting TOP2A could result from inhibition of TOP2B. A simple and rapid biochemical assay for the activity of TOP2A and TOP2B would be advantageous for screening for novel inhibitors, testing them for selectivity for one enzyme over the other, and testing for potential toxicity of antibacterial type II topoisomerases mediated by human topoisomerase II inhibition. In this paper, we show that a previously reported high-throughput, fluorescence anisotropy-based assay for ATP-dependent relaxation of supercoiled DNA by human TOP2A can also be used under identical conditions for human TOP2B. We used this assay to compare the potencies versus both enzymes of 19 compounds reported in the literature to inhibit human and/or bacterial type II topoisomerases. We also used the assay to investigate the effect of ATP concentration on inhibitor potencies.
Collapse
Affiliation(s)
- Adam B Shapiro
- Infection Innovative Medicines Unit, AstraZeneca R&D Boston, Waltham, MA 02451, USA.
| | - Caroline A Austin
- Institute for Cell and Molecular Biosciences, The Medical School, The University of Newcastle-upon-Tyne, Newcastle-upon-Tyne NE2 4HH, UK
| |
Collapse
|
14
|
Darzynkiewicz Z, Zhao H, Halicka HD, Rybak P, Dobrucki J, Wlodkowic D. DNA damage signaling assessed in individual cells in relation to the cell cycle phase and induction of apoptosis. Crit Rev Clin Lab Sci 2012; 49:199-217. [PMID: 23137030 DOI: 10.3109/10408363.2012.738808] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reviewed are the phosphorylation events reporting activation of protein kinases and the key substrates critical for the DNA damage signaling (DDS). These DDS events are detected immunocytochemically using phospho-specific Abs; flow cytometry or image-assisted cytometry provide the means to quantitatively assess them on a cell by cell basis. The multiparameter analysis of the data is used to correlate these events with each other and relate to the cell cycle phase, DNA replication and induction of apoptosis. Expression of γH2AX as a possible marker of induction of DNA double strand breaks is the most widely studied event of DDS. Reviewed are applications of this multiparameter approach to investigate constitutive DDS reporting DNA damage by endogenous oxidants byproducts of oxidative phosphorylation. Also reviewed are its applications to detect and explore mechanisms of DDS induced by variety of exogenous agents targeting DNA such as exogenous oxidants, ionizing radiation, radiomimetic drugs, UV light, DNA topoisomerase I and II inhibitors, DNA crosslinking drugs and variety of environmental genotoxins. Analysis of DDS induced by these agents provides often a wealth of information about mechanism of induction and the type of DNA damage (lesion) and is reviewed in the context of cell cycle phase specificity, DNA replication, and induction of apoptosis or cell senescence. Critically assessed is interpretation of the data as to whether the observed DDS events report induction of a particular type of DNA lesion.
Collapse
Affiliation(s)
- Zbigniew Darzynkiewicz
- Brander Cancer Research Institute and Department of Pathology, New York Medical College, Valhalla, NY 10595, USA.
| | | | | | | | | | | |
Collapse
|