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Saeed HE, Ibrahim RR, Kamel S, El-Nahass ES, Khalifa AG. Behavioral, biochemical, histopathological evaluation and gene expression of brain injury induced by nanoceria injected intranasal or intraperitoneal in mice. Toxicol Res (Camb) 2024; 13:tfae095. [PMID: 38966091 PMCID: PMC11221883 DOI: 10.1093/toxres/tfae095] [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: 01/30/2024] [Revised: 04/18/2024] [Accepted: 06/17/2024] [Indexed: 07/06/2024] Open
Abstract
Background Nanotechnology has shown a remarkable progress nevertheless, there is a growing concern about probable neurotoxic and neurodegenerative effects due to NPs exposure. Various toxicological and epidemiological studies reported that the brain is a main target for ultrafine particles. Brain inflammation is considered as a possible mechanism that can participate to neurotoxic and neurodegenerative effects. Whether nanoparticles (NPs) may produce neurotoxicity and promote neurodegenerative is largely unstudied. The present study was done to investigate whether intranasal and intra-peritoneal exposure to cerium oxide nanoparticles (CeO2NPs, nanoceria (NC)) could cause neurotoxicity and neurodegenerative changes in the brain tissue through conducting some behavioral tests, biochemical evaluation, histopathological examinations of brain hippocampus and gene expressions. Method Fifteen mice were separated into 3 equal groups. In group (I) "control group", mice were received distilled water orally and kept as a control group. Mice in the group (II) "NC I/P group" were injected i.p with cerium oxide nanoparticles at a dose of 40 mg/kg b.wt, twice weekly for 3 weeks. In group (III) "NC I/N group" mice were received nanoceria intranasally (40 mg/kg b.wt), twice weekly for 3 weeks. Results Exposure to nanceria resulted in oxidative damage in brain tissue, a significant increase in malondialdehyde (MDA) and acetylcholinestrase (AchE) levels, significant decrease in reduced glutathione (GSH) concentration, upregulation in the apoptosis-related genes (c-Jun: c-Jun N-terminal kinases (JNKs), c-Fos: Fos protooncogene, AP-1 transcription factor subunit, c-Myc: c-myelocytomatosis oncogene product or MYC protooncogene, bHLH transcription factor), locomotor and cognitive impairment in mice but the effect was more obvious when nanoceria adminstred intraperitoneally. Conculsion Nanoceria cause oxidative damage in brain tissue of mice when adminstred nanoceria intraperitoneally more than those received nanoceria intranasal.
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Affiliation(s)
- Hanan E Saeed
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Rasha Ragab Ibrahim
- Department of Animal and Poultry Management and Wealth Development, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Shaimaa Kamel
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Cairo University, Cairo, 12211, Egypt
| | - El-Shaymaa El-Nahass
- Department of Veterinary Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Ahlam G Khalifa
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
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Paspaltsis I, Kanata E, Sotiriadis S, Correia SS, Schmitz M, Zerr I, Dafou D, Xanthopoulos K, Sklaviadis T. A Comparison of RML Prion Inactivation Efficiency by Heterogeneous and Homogeneous Photocatalysis. Pathogens 2024; 13:420. [PMID: 38787272 PMCID: PMC11124347 DOI: 10.3390/pathogens13050420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/10/2024] [Accepted: 05/11/2024] [Indexed: 05/25/2024] Open
Abstract
Prions are proteinaceous pathogens responsible for a variety of devastating diseases in mammals, including scrapie in sheep and goats, chronic wasting disease in cervids, and Creutzfeldt-Jakob disease (CJD) in humans. They are characterized by their exceptional persistence to common inactivation procedures. This applies to all possible sources of prion contamination as prions may be present in the tissues and biological fluids of infected individuals. Hence, efficient prion inactivation procedures are still being sought to minimize the risk of intra- or inter-species transmission. In the past, photocatalytic treatment has been proven to be capable of efficiently oxidizing and inactivating prions. In the present study, the efficacy of homogeneous photo-Fenton-based photocatalysis as well as heterogeneous photocatalysis with TiO2 in reducing RML mouse scrapie infectivity was evaluated. Prion inactivation was assessed by means of a bioassay, and the results were confirmed by in vitro experiments. While the prion infectivity of the RML mouse scrapie was reduced after treatment with the photo-Fenton reagent, the heterogeneous photocatalytic treatment of the same prion strain completely eliminated prion infectivity.
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Affiliation(s)
- Ioannis Paspaltsis
- Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.P.); (E.K.); (S.S.)
| | - Eirini Kanata
- Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.P.); (E.K.); (S.S.)
| | - Sotirios Sotiriadis
- Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.P.); (E.K.); (S.S.)
| | - Susana Silva Correia
- Department of Neurology, University Medicine Goettingen, German Center for Neurodegenerative Diseases (DZNE), 37075 Göttingen, Germany
| | - Matthias Schmitz
- Department of Neurology, University Medicine Goettingen, German Center for Neurodegenerative Diseases (DZNE), 37075 Göttingen, Germany
| | - Inga Zerr
- Department of Neurology, University Medicine Goettingen, German Center for Neurodegenerative Diseases (DZNE), 37075 Göttingen, Germany
| | - Dimitra Dafou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Konstantinos Xanthopoulos
- Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.P.); (E.K.); (S.S.)
- Centre for Research and Technology Hellas, Institute of Applied Biosciences, 57001 Thermi, Greece
| | - Theodoros Sklaviadis
- Laboratory of Pharmacology, Department of Pharmacy, School of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.P.); (E.K.); (S.S.)
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de Groot DMG, Linders L, Kayser R, Nederlof R, de Esch C, Slieker RC, Kuper CF, Wolterbeek A, de Groot VJ, Veltien A, Heerschap A, van Waarde A, Dierckx RAJO, de Vries EFJ. Perinatal exposure to the immune-suppressant di-n-octyltin dichloride affects brain development in rats. Toxicol Mech Methods 2024; 34:283-299. [PMID: 37946400 DOI: 10.1080/15376516.2023.2281610] [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: 08/29/2023] [Accepted: 11/05/2023] [Indexed: 11/12/2023]
Abstract
Disruption of the immune system during embryonic brain development by environmental chemicals was proposed as a possible cause of neurodevelopmental disorders. We previously found adverse effects of di-n-octyltin dichloride (DOTC) on maternal and developing immune systems of rats in an extended one-generation reproductive toxicity study according to the OECD 443 test guideline. We hypothesize that the DOTC-induced changes in the immune system can affect neurodevelopment. Therefore, we used in-vivo MRI and PET imaging and genomics, in addition to behavioral testing and neuropathology as proposed in OECD test guideline 443, to investigate the effect of DOTC on structural and functional brain development. Male rats were exposed to DOTC (0, 3, 10, or 30 mg/kg of diet) from 2 weeks prior to mating of the F0-generation until sacrifice of F1-animals. The brains of rats, exposed to DOTC showed a transiently enlarged volume of specific brain regions (MRI), altered specific gravity, and transient hyper-metabolism ([18F]FDG PET). The alterations in brain development concurred with hyper-responsiveness in auditory startle response and slight hyperactivity in young adult animals. Genomics identified altered transcription of key regulators involved in neurodevelopment and neural function (e.g. Nrgrn, Shank3, Igf1r, Cck, Apba2, Foxp2); and regulators involved in cell size, cell proliferation, and organ development, especially immune system development and functioning (e.g. LOC679869, Itga11, Arhgap5, Cd47, Dlg1, Gas6, Cml5, Mef2c). The results suggest the involvement of immunotoxicity in the impairment of the nervous system by DOTC and support the hypothesis of a close connection between the immune and nervous systems in brain development.
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Affiliation(s)
- Didima M G de Groot
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Louisa Linders
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Reinier Kayser
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Rianne Nederlof
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Celine de Esch
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Roderick C Slieker
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - C Frieke Kuper
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Andre Wolterbeek
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - V Jeroen de Groot
- Department of Toxicology and Applied Pharmacology, TNO Nutrition and Food Research (as part of TNO Quality of Life), Zeist, the Netherlands
| | - Andor Veltien
- Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Arend Heerschap
- Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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Hunt PR, Welch B, Camacho J, Bushana PN, Rand H, Sprando RL, Ferguson M. The worm Adult Activity Test (wAAT): A de novo mathematical model for detecting acute chemical effects in Caenorhabditis elegans. J Appl Toxicol 2023; 43:1899-1915. [PMID: 37551865 DOI: 10.1002/jat.4525] [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: 04/27/2023] [Revised: 07/05/2023] [Accepted: 07/20/2023] [Indexed: 08/09/2023]
Abstract
We have adapted a semiautomated method for tracking Caenorhabditis elegans spontaneous locomotor activity into a quantifiable assay by developing a sophisticated method for analyzing the time course of measured activity. The 16-h worm Adult Activity Test (wAAT) can be used to measure C. elegans activity levels for efficient screening for pharmacological and toxicity-induced effects. As with any apical endpoint assay, the wAAT is mode of action agnostic, allowing for detection of effects from a broad spectrum of response pathways. With caffeine as a model mild stimulant, the wAAT showed transient hyperactivity followed by reversion to baseline. Mercury chloride (HgCl2 ) produced an early dose-response hyperactivity phase followed by pronounced hypoactivity, a behavior pattern we have termed a toxicant "escape response." Methylmercury chloride (meHgCl) produced a similar pattern to HgCl2 , but at much lower concentrations, a weaker hyperactivity response, and more pronounced hypoactivity. Sodium arsenite (NaAsO2 ) and dimethylarsinic acid (DMA) induced hypoactivity at high concentrations. Acute toxicity, as measured by hypoactivity in C. elegans adults, was ranked: meHgCl > HgCl2 > NaAsO2 = DMA. Caffeine was not toxic with the wAAT at tested concentrations. Methods for conducting the wAAT are described, along with instructions for preparing C. elegans Habitation Medium, a liquid nutrient medium that allows for developmental timing equivalent to that found with C. elegans grown on agar with OP50 Escherichia coli feeder cultures. A de novo mathematical parametric model for adult C. elegans activity and the application of this model in ranking exposure toxicity are presented.
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Affiliation(s)
- Piper Reid Hunt
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, Laurel, Maryland, USA
| | - Bonnie Welch
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, Laurel, Maryland, USA
| | - Jessica Camacho
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, Laurel, Maryland, USA
| | - Priyanka N Bushana
- Department of Translational Medicine and Physiology, Washington State University - Health Science Campus, Pullman, Washington, USA
| | - Hugh Rand
- Biostatistics and Bioinformatics Staff, Office of Analytics and Outreach, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, Maryland, USA
| | - Robert L Sprando
- Division of Toxicology, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, Laurel, Maryland, USA
| | - Martine Ferguson
- Biostatistics and Bioinformatics Staff, Office of Analytics and Outreach, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, Maryland, USA
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Coles L, Forcelli PA, Leclercq K, Katsarou AM, Klein BD, Potschka H, Koehling R, Harte-Hargrove L, Galanopoulou AS, Metcalf CS. Preclinical common data elements for general pharmacological studies (pharmacokinetic sample collection, tolerability, and drug administration). A report of the TASK3-WG1A General Pharmacology Working Group of the ILAE/AES Joint Translational Task Force. Epilepsia Open 2023. [PMID: 36896626 DOI: 10.1002/epi4.12721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 03/07/2023] [Indexed: 03/11/2023] Open
Abstract
Growing concerns over rigor and reproducibility of preclinical studies, including consistency across laboratories and translation to clinical populations, have triggered efforts to harmonize methodologies. This includes the first set of preclinical common data elements (CDEs) for epilepsy research studies, as well as Case Report Forms (CRFs) for widespread use in epilepsy research. The General Pharmacology Working Group of the ILAE/AES Task Force (TASK3-WG1A) has continued in this effort by adapting and refining CDEs/CRFs to address specific study design areas as they relate to preclinical drug screening: general pharmacology, pharmacokinetics (PK) and pharmacodynamics (PD), and tolerability. This work has expanded general pharmacology studies to include dose records, PK/PD, tolerability, and elements of rigor and reproducibility. Tolerability testing CRFs included rotarod and Irwin/Functional Observation Battery (FOB) assays. The material provided in the form of CRFs can be delivered for widespread use within the epilepsy research community.
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Affiliation(s)
- Lisa Coles
- Department of Experimental and Clinical Pharmacology, The University of Minnesota, College of Pharmacy, Minneapolis, Minnesota, USA
| | - Patrick A Forcelli
- Department of Pharmacology & Physiology, Georgetown University, Washington, District of Columbia, USA
- Department of Neuroscience, Georgetown University, Washington, District of Columbia, USA
| | - Karine Leclercq
- Early Solutions Department, UCB Pharma, Braine-l'Alleud, Belgium
| | - Anna-Maria Katsarou
- Laboratory of Developmental Epilepsy, Saul R. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Brian D Klein
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - Heidrun Potschka
- Institute of Pharmacology, Toxicology, and Pharmacy, Ludwig-Maximilians-University, Munich, Germany
| | - Rudiger Koehling
- Oscar-Langendorff-Institute of Physiology, Rostock University Medical Center, Rostock, Germany
| | | | - Aristea S Galanopoulou
- Isabelle Rapin Division of Child Neurology, Saul R. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, New York, USA
- Dominick P Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Cameron S Metcalf
- Department of Pharmacology and Toxicology, The University of Utah, College of Pharmacy, Salt Lake City, Utah, USA
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Huang L, Zhang W, Zhou W, Chen L, Liu G, Shi W. Behaviour, a potential bioindicator for toxicity analysis of waterborne microplastics: A review. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.117044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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7
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In silico studies, X-ray diffraction analysis and biological investigation of fluorinated pyrrolylated-chalcones in zebrafish epilepsy models. Heliyon 2023; 9:e13685. [PMID: 36852036 PMCID: PMC9958447 DOI: 10.1016/j.heliyon.2023.e13685] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/13/2023] Open
Abstract
Epilepsy is the third most common known brain disease worldwide. Several antiepileptic drugs (AEDs) are available to improve seizure control. However, the associated side effects limit their practical use and highlight the ongoing search for safer and effective AEDs. Eighteen newly designed fluorine-containing pyrrolylated chalcones were extensively studied in silico, synthesized, structurally analyzed by X-ray diffraction (XRD), and biologically and toxicologically tested as potential new AEDs in zebrafish epilepsy in vivo models. The results predicted that 3-(3,5-difluorophenyl)-1-(1H-pyrrol-2-yl)prop-2-en-1-one (compound 8) had a good drug-like profile with binding affinity to γ-aminobutyric acid receptor type-A (GABAA, -8.0 kcal/mol). This predicted active compound 8 was effective in reducing convulsive behaviour in pentylenetetrazol (PTZ)-induced larvae and hyperactive movements in zc4h2 knockout (KO) zebrafish, experimentally. Moreover, no cardiotoxic effect of compound 8 was observed in zebrafish. Overall, pyrrolylated chalcones could serve as alternative AEDs and warrant further in-depth pharmacological studies to uncover their mechanism of action.
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8
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Shuliakevich A, Schröder K, Nagengast L, Muz M, Pipal M, Brückner I, Hilscherova K, Brack W, Schiwy S, Hollert H. Morphological and behavioral alterations in zebrafish larvae after exposure to contaminated river sediments collected in different weather conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:157922. [PMID: 35961394 DOI: 10.1016/j.scitotenv.2022.157922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/31/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
Wastewater treatment plants (WWTPs) are the primary source of micropollutants in aquatic ecosystems. Many micropollutants tend to bind to sediments and persist until remobilizion by bioturbation or flood events. Advanced effluent treatment by ozonation has been proven to eliminate most micropollutants. The present study characterizes sediments' toxic potential regarding zebrafish embryo development, which highly complex nervous system is vulnerable to exposure to neurotoxic substances. Furthermore, behavioral changes can be induced even at low pollutant concentrations and do not cause acute toxicity. The study area includes stretches of the main waterbody, the Wurm River (sampling sites W1-W5), and its tributary the Haarbach River (sampling sites H1, and H2) in North-Rhine Westphalia, Germany. Both waterbodies serve as recipients of WWTPs' effluents. The effluent entering the Haarbach River is conventionally treated, while the Wurm River receives ozonated effluent from the Aachen-Soers WWTP. Seven sampling sites up- and downstream of the WWTPs were investigated in June of two subsequent years. The first sampling campaign in 2017 was characterized by prolonged dry weather. The second sampling campaign in 2018 occurred after prolonged rain events and the release of the rainwater overflow basin. Direct exposure of zebrafish embryos to native sediments using the sediment contact test represented an ecologically realistic scenario and showed no acute sublethal effects. Exposure of the zebrafish embryo to freeze-dried sediments representing the ecotoxicological status of sediments during flood events unfolded acute sublethal toxicity. Behavioral studies with zebrafish larvae were an essential part of environmental neurotoxicity testing. Zebrafish larvae exposed to sediments' concentrations causing no acute effects led to behavioral changes signalizing neurotoxic substances in sediments. Polyaromatic hydrocarbons, polychlorinated biphenyls, and nitroaromatic compounds were identified as potential toxicity drivers, whereby the rainwater overflow basin served as a possible source of pollution. Mixture toxicity, effect-directed analysis, and further sediment monitoring are needed.
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Affiliation(s)
- Aliaksandra Shuliakevich
- Goethe University Frankfurt/Main, Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany
| | - Katja Schröder
- RWTH Aachen University, Institute of Biology V, Worringerweg 1, 52074 Aachen, Germany
| | - Laura Nagengast
- RWTH Aachen University, Institute of Biology V, Worringerweg 1, 52074 Aachen, Germany
| | - Melis Muz
- Helmholtz Centre for Environmental Research - UFZ, Department of Effect-Directed Analysis, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Marek Pipal
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, Brno, Czech Republic
| | - Ira Brückner
- Eifel-Rur Waterboard (WVER), Eisenbahnstr. 5, 52354 Düren, Germany
| | - Klara Hilscherova
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, Brno, Czech Republic
| | - Werner Brack
- Goethe University Frankfurt/Main, Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany; Helmholtz Centre for Environmental Research - UFZ, Department of Effect-Directed Analysis, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Sabrina Schiwy
- Goethe University Frankfurt/Main, Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany
| | - Henner Hollert
- Goethe University Frankfurt/Main, Department Evolutionary Ecology and Environmental Toxicology, Max-von-Laue-Strasse 13, 60438 Frankfurt/Main, Germany.
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Ansari L, Mahdinezhad MR, Rakhshandeh H, Hosseini A, Noughabi SB, Gholami N, Rajabian A. Acute and sub-acute toxicity assessment of the standardized extract of Sanguisorba minor in vivo. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2022; 19:987-997. [PMID: 34881541 DOI: 10.1515/jcim-2021-0391] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
Although Sanguisorba minor has been used as herbal medicine, no study has ever examined its potential toxicity. This study investigated acute and subacute toxicities of S. minor hydroalcoholic extract (SE). In the acute toxicity test, a single oral dose (300, 2,000, and 3,000 mg/kg) of SE was given to mice. The oral administration of SE (100, 200, and 400 mg/kg for 4 weeks) was performed to evaluate subacute toxicity. After the treatments, neurobehavioral, histopathology, hematological, and biochemical parameters were monitored. In vitro cytotoxicity was also assessed. Moreover, high-performance liquid chromatography fingerprint was done for the standardization of SE. The no-observed-adverse-effect level of SE was up to 2,000 mg/kg, and the LD50 of the prepared extract was over 3,000 mg/kg. The rats exposed to the extract did not show any marked change in their body weight. The extract at used doses did not affect neuromuscular coordination. According to the hematological, biochemical, and histological examinations, no significant treatment-related adverse effect of the extract was observed, even at 400 mg/kg. Only 48 h exposure to 400 μg/mL of SE reduced the viability of PC12 cells. The findings revealed that this plant could be well-tolerated, regarded safe, and used as herbal medicine.
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Affiliation(s)
- Legha Ansari
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia, Iran
| | - Mohammad Reza Mahdinezhad
- Department of Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hassan Rakhshandeh
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Azar Hosseini
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Samaneh Boroumand Noughabi
- Department of Pathology, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Hematology and Blood Banking, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Najibeh Gholami
- Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Arezoo Rajabian
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Internal Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Herrera MI, Udovin LD, Kobiec T, Toro-Urrego N, Kusnier CF, Kölliker-Frers RA, Luaces JP, Otero-Losada M, Capani F. Palmitoylethanolamide attenuates neurodevelopmental delay and early hippocampal damage following perinatal asphyxia in rats. Front Behav Neurosci 2022; 16:953157. [PMID: 36090655 PMCID: PMC9452789 DOI: 10.3389/fnbeh.2022.953157] [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: 05/25/2022] [Accepted: 07/25/2022] [Indexed: 01/11/2023] Open
Abstract
Impaired gas exchange close to labor causes perinatal asphyxia (PA), a neurodevelopmental impairment factor. Palmitoylethanolamide (PEA) proved neuroprotective in experimental brain injury and neurodegeneration models. This study aimed to evaluate PEA effects on the immature-brain, i.e., early neuroprotection by PEA in an experimental PA paradigm. Newborn rats were placed in a 37°C water bath for 19 min to induce PA. PEA 10 mg/kg, s.c., was administered within the first hour of life. Neurobehavioral responses were assessed from postnatal day 1 (P1) to postnatal day 21 (P21), recording the day of appearance of several reflexes and neurological signs. Hippocampal CA1 area ultrastructure was examined using electron microscopy. Microtubule-associated protein 2 (MAP-2), phosphorylated high and medium molecular weight neurofilaments (pNF H/M), and glial fibrillary acidic protein (GFAP) were assessed using immunohistochemistry and Western blot at P21. Over the first 3 weeks of life, PA rats showed late gait, negative geotaxis and eye-opening onset, and delayed appearance of air-righting, auditory startle, sensory eyelid, forelimb placing, and grasp reflexes. On P21, the hippocampal CA1 area showed signs of neuronal degeneration and MAP-2 deficit. PEA treatment reduced PA-induced hippocampal damage and normalized the time of appearance of gait, air-righting, placing, and grasp reflexes. The outcome of this study might prove useful in designing intervention strategies to reduce early neurodevelopmental delay following PA.
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Affiliation(s)
- Maria I. Herrera
- Centro de Investigaciones en Psicología y Psicopedagogía, Facultad de Psicología, Pontificia Universidad Católica Argentina, Buenos Aires, Argentina,Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Lucas D. Udovin
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Tamara Kobiec
- Centro de Investigaciones en Psicología y Psicopedagogía, Facultad de Psicología, Pontificia Universidad Católica Argentina, Buenos Aires, Argentina,Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Nicolas Toro-Urrego
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Carlos F. Kusnier
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Rodolfo A. Kölliker-Frers
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Juan P. Luaces
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Matilde Otero-Losada
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Francisco Capani
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina,Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago, Chile,*Correspondence: Francisco Capani,
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11
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Seventy-Day Toxicity Study in Juvenile Sprague-Dawley Rats with Semicarbazide (SEM) from Weaning to Sexual Maturity. J Toxicol 2022; 2022:5059761. [PMID: 35910536 PMCID: PMC9337958 DOI: 10.1155/2022/5059761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 06/27/2022] [Indexed: 11/18/2022] Open
Abstract
The study was conducted to evaluate the toxicological effects, functional observation battery tests, and sexual maturity of semicarbazide oral gavage administration to juvenile Sprague-Dawley rats for 70 days at 0, 15, 30, and 60 mg/kg/day weaning to sexual maturity. At 60 mg/kg/day, there was a delay in mean age at acquisition of balano-preputial and vaginal patency and a decrease in body weight and food consumption in males. Treatment increased reticulocyte count, aspartate aminotransferase, and alanine aminotransferase levels in both sexes and decreased hematocrit and protein in males. Increased absolute and relative liver and spleen weight in both sexes were observed. Male rats had lower thymus and testes weights, whereas female rats had lower uterine weights. Semicarbazide caused significant changes in sperm motility, sperm count, and sperm abnormality. Histopathologically, semicarbazide caused cortical hypertrophy in adrenals and increased extramedullary hematopoiesis in the spleen; hepatocellular hypertrophy, follicular epithelial hypertrophy in the thyroid, and degeneration of seminiferous tubules in the testis were observed at 60 mg/kg/day when compared to control. Results suggest that 60 mg/kg/day of semicarbazide can exert systemic toxicity in juvenile rats. The no observed adverse effect level (NOAEL) of semicarbazide for juvenile Sprague-Dawley rats was estimated to be 30 mg/kg/day.
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12
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Stekic A, Zeljkovic M, Zaric Kontic M, Mihajlovic K, Adzic M, Stevanovic I, Ninkovic M, Grkovic I, Ilic TV, Nedeljkovic N, Dragic M. Intermittent Theta Burst Stimulation Ameliorates Cognitive Deficit and Attenuates Neuroinflammation via PI3K/Akt/mTOR Signaling Pathway in Alzheimer’s-Like Disease Model. Front Aging Neurosci 2022; 14:889983. [PMID: 35656538 PMCID: PMC9152158 DOI: 10.3389/fnagi.2022.889983] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 04/13/2022] [Indexed: 11/13/2022] Open
Abstract
Neurodegeneration implies progressive neuronal loss and neuroinflammation further contributing to pathology progression. It is a feature of many neurological disorders, most common being Alzheimer’s disease (AD). Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive stimulation which modulates excitability of stimulated brain areas through magnetic pulses. Numerous studies indicated beneficial effect of rTMS in several neurological diseases, including AD, however, exact mechanism are yet to be elucidated. We aimed to evaluate the effect of intermittent theta burst stimulation (iTBS), an rTMS paradigm, on behavioral, neurochemical and molecular level in trimethyltin (TMT)-induced Alzheimer’s-like disease model. TMT acts as a neurotoxic agent targeting hippocampus causing cognitive impairment and neuroinflammation, replicating behavioral and molecular aspects of AD. Male Wistar rats were divided into four experimental groups–controls, rats subjected to a single dose of TMT (8 mg/kg), TMT rats subjected to iTBS two times per day for 15 days and TMT sham group. After 3 weeks, we examined exploratory behavior and memory, histopathological and changes on molecular level. TMT-treated rats exhibited severe and cognitive deficit. iTBS-treated animals showed improved cognition. iTBS reduced TMT-induced inflammation and increased anti-inflammatory molecules. We examined PI3K/Akt/mTOR signaling pathway which is involved in regulation of apoptosis, cell growth and learning and memory. We found significant downregulation of phosphorylated forms of Akt and mTOR in TMT-intoxicated animals, which were reverted following iTBS stimulation. Application of iTBS produces beneficial effects on cognition in of rats with TMT-induced hippocampal neurodegeneration and that effect could be mediated via PI3K/Akt/mTOR signaling pathway, which could candidate this protocol as a potential therapeutic approach in neurodegenerative diseases such as AD.
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Affiliation(s)
- Andjela Stekic
- Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Milica Zeljkovic
- Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Marina Zaric Kontic
- Department of Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Katarina Mihajlovic
- Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Marija Adzic
- Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Ivana Stevanovic
- Medical Faculty of Military Medical Academy, University of Defence, Belgrade, Serbia
- Institute for Medical Research, Military Medical Academy, Belgrade, Serbia
| | - Milica Ninkovic
- Medical Faculty of Military Medical Academy, University of Defence, Belgrade, Serbia
- Institute for Medical Research, Military Medical Academy, Belgrade, Serbia
| | - Ivana Grkovic
- Department of Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Tihomir V. Ilic
- Medical Faculty of Military Medical Academy, University of Defence, Belgrade, Serbia
| | - Nadezda Nedeljkovic
- Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Milorad Dragic
- Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia
- *Correspondence: Milorad Dragic,
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13
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Hiengrach P, Visitchanakun P, Tongchairawewat P, Tangsirisatian P, Jungteerapanich T, Ritprajak P, Wannigama DL, Tangtanatakul P, Leelahavanichkul A. Sepsis Encephalopathy Is Partly Mediated by miR370-3p-Induced Mitochondrial Injury but Attenuated by BAM15 in Cecal Ligation and Puncture Sepsis Male Mice. Int J Mol Sci 2022; 23:ijms23105445. [PMID: 35628259 PMCID: PMC9141734 DOI: 10.3390/ijms23105445] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 02/06/2023] Open
Abstract
BAM15 (a mitochondrial uncoupling agent) was tested on cecal ligation and puncture (CLP) sepsis mice with in vitro experiments. BAM15 attenuated sepsis as indicated by survival, organ histology (kidneys and livers), spleen apoptosis (activated caspase 3), brain injury (SHIRPA score, serum s100β, serum miR370-3p, brain miR370-3p, brain TNF-α, and apoptosis), systemic inflammation (cytokines, cell-free DNA, endotoxemia, and bacteremia), and blood-brain barrier (BBB) damage (Evan's blue dye and the presence of green fluorescent E. coli in brain after an oral administration). In parallel, brain miR arrays demonstrated miR370-3p at 24 h but not 120 h post-CLP, which was correlated with metabolic pathways. Either lipopolysaccharide (LPS) or TNF-α upregulated miR370-3p in PC12 (neuron cells). An activation by sepsis factors (LPS, TNF-α, or miR370-3p transfection) damaged mitochondria (fluorescent color staining) and reduced cell ATP, possibly through profound mitochondrial activity (extracellular flux analysis) that was attenuated by BAM15. In bone-marrow-derived macrophages, LPS caused mitochondrial injury, decreased cell ATP, enhanced glycolysis activity (extracellular flux analysis), and induced pro-inflammatory macrophages (iNOS and IL-1β) which were neutralized by BAM15. In conclusion, BAM15 attenuated sepsis through decreased mitochondrial damage, reduced neuronal miR370-3p upregulation, and induced anti-inflammatory macrophages. BAM15 is proposed to be used as an adjuvant therapy against sepsis hyperinflammation.
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Affiliation(s)
- Pratsanee Hiengrach
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand; (P.H.); (P.V.)
| | - Peerapat Visitchanakun
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand; (P.H.); (P.V.)
| | - Pakteema Tongchairawewat
- Chulalongkorn University International Medical Program, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (P.T.); (P.T.); (T.J.)
| | - Ponphisudti Tangsirisatian
- Chulalongkorn University International Medical Program, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (P.T.); (P.T.); (T.J.)
| | - Thitiphat Jungteerapanich
- Chulalongkorn University International Medical Program, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand; (P.T.); (P.T.); (T.J.)
| | - Patcharee Ritprajak
- Research Unit in Integrative Immuno-Microbial Biochemistry and Bioresponsive Nanomaterials, Department of Microbiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand;
| | - Dhammika Leshan Wannigama
- Antimicrobial Resistance and Stewardship Research Unit, Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand;
- School of Medicine, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands, WA 6009, Australia
| | - Pattarin Tangtanatakul
- Department of Transfusion Medicine and Clinical Microbiology, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand
- Center of Excellence in Immunology and Immune-Mediated Disease, Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence: (P.T.); (A.L.); Tel.: +66-2256-4132 (A.L.); Fax: +66-2252-5952 (A.L.)
| | - Asada Leelahavanichkul
- Center of Excellence on Translational Research in Inflammation and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok 10330, Thailand; (P.H.); (P.V.)
- Nephrology Unit, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence: (P.T.); (A.L.); Tel.: +66-2256-4132 (A.L.); Fax: +66-2252-5952 (A.L.)
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14
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A hacked kitchen scale-based system for quantification of grip strength in rodents. Comput Biol Med 2022; 144:105391. [DOI: 10.1016/j.compbiomed.2022.105391] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 03/08/2022] [Accepted: 03/08/2022] [Indexed: 12/14/2022]
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15
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Harry GJ, McBride S, Witchey SK, Mhaouty-Kodja S, Trembleau A, Bridge M, Bencsik A. Roadbumps at the Crossroads of Integrating Behavioral and In Vitro Approaches for Neurotoxicity Assessment. FRONTIERS IN TOXICOLOGY 2022; 4:812863. [PMID: 35295216 PMCID: PMC8915899 DOI: 10.3389/ftox.2022.812863] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/25/2022] [Indexed: 12/15/2022] Open
Abstract
With the appreciation that behavior represents the integration and complexity of the nervous system, neurobehavioral phenotyping and assessment has seen a renaissance over the last couple of decades, resulting in a robust database on rodent performance within various testing paradigms, possible associations with human disorders, and therapeutic interventions. The interchange of data across behavior and other test modalities and multiple model systems has advanced our understanding of fundamental biology and mechanisms associated with normal functions and alterations in the nervous system. While there is a demonstrated value and power of neurobehavioral assessments for examining alterations due to genetic manipulations, maternal factors, early development environment, the applied use of behavior to assess environmental neurotoxicity continues to come under question as to whether behavior represents a sensitive endpoint for assessment. Why is rodent behavior a sensitive tool to the neuroscientist and yet, not when used in pre-clinical or chemical neurotoxicity studies? Applying new paradigms and evidence on the biological basis of behavior to neurobehavioral testing requires expertise and refinement of how such experiments are conducted to minimize variability and maximize information. This review presents relevant issues of methods used to conduct such test, sources of variability, experimental design, data analysis, interpretation, and reporting. It presents beneficial and critical limitations as they translate to the in vivo environment and considers the need to integrate across disciplines for the best value. It proposes that a refinement of behavioral assessments and understanding of subtle pronounced differences will facilitate the integration of data obtained across multiple approaches and to address issues of translation.
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Affiliation(s)
- G. Jean Harry
- Neurotoxicology Group, Molecular Toxicology Branch, Division National Toxicology Program, National Institute of Environmental Health Sciences, Durham, NC, United States
- *Correspondence: G. Jean Harry,
| | - Sandra McBride
- Social & Scientific Systems, Inc., a DLH Holdings Company, Durham, NC, United States
| | - Shannah K. Witchey
- Division National Toxicology Program, National Institute of Environmental Health Sciences, Durham, NC, United States
| | - Sakina Mhaouty-Kodja
- Sorbonne Université, CNRS, INSERM, Neuroscience Paris Seine – Institut de Biologie Paris Seine, Paris, France
| | - Alain Trembleau
- Sorbonne Université, CNRS UMR8246, Inserm U1130, Institut de Biologie Paris Seine (IBPS), Neuroscience Paris Seine (NPS), Paris, France
| | - Matthew Bridge
- Social & Scientific Systems, Inc., a DLH Holdings Company, Durham, NC, United States
| | - Anna Bencsik
- Anses Laboratoire de Lyon, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université de Lyon 1, Lyon, France
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16
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Graham DL, Madkour HS, Noble BL, Schatschneider C, Stanwood GD. Long-term functional alterations following prenatal GLP-1R activation. Neurotoxicol Teratol 2021; 87:106984. [PMID: 33864929 PMCID: PMC8555578 DOI: 10.1016/j.ntt.2021.106984] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/29/2021] [Accepted: 04/09/2021] [Indexed: 12/11/2022]
Abstract
Evidence supporting the use of glucagon-like peptide-1 (GLP-1) analogues to pharmacologically treat disorders beyond type 2 diabetes and obesity is increasing. However, little is known about how activation of the GLP-1 receptor (GLP-1R) during pregnancy affects maternal and offspring outcomes. We treated female C57Bl/6 J mice prior to conception and throughout gestation with a long-lasting GLP-1R agonist, Exendin-4. While GLP-1R activation has significant effects on food and drug reward, depression, locomotor activity, and cognition in adults, we found few changes in these domains in exendin-4-exposed offspring. Repeated injections of Exendin-4 had minimal effects on the dams and may have enhanced maternal care. Offspring exposed to the drug weighed significantly more than their control counterparts during the preweaning period and demonstrated alterations in anxiety-like outcomes, which indicate a developmental role for GLP-1R modulation in the stress response that may be sex-specific.
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Affiliation(s)
- Devon L Graham
- Department of Biomedical Sciences and Center for Brain Repair, Florida State University College of Medicine, Tallahassee, FL 32306, United States of America
| | - Haley S Madkour
- Department of Biomedical Sciences and Center for Brain Repair, Florida State University College of Medicine, Tallahassee, FL 32306, United States of America
| | - Brenda L Noble
- Department of Biomedical Sciences and Center for Brain Repair, Florida State University College of Medicine, Tallahassee, FL 32306, United States of America
| | - Chris Schatschneider
- Department of Psychology, Florida State University, Tallahassee, FL 32306, United States of America
| | - Gregg D Stanwood
- Department of Biomedical Sciences and Center for Brain Repair, Florida State University College of Medicine, Tallahassee, FL 32306, United States of America.
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17
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Zhou C, Liu M, Mei X, Li Q, Zhang W, Deng P, He Z, Xi Y, Tong T, Pi H, Lu Y, Chen C, Zhang L, Yu Z, Zhou Z, He M. Histone hypoacetylation contributes to neurotoxicity induced by chronic nickel exposure in vivo and in vitro. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 783:147014. [PMID: 34088129 DOI: 10.1016/j.scitotenv.2021.147014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 04/04/2021] [Accepted: 04/04/2021] [Indexed: 06/12/2023]
Abstract
Nickel (Ni) is a heavy metal that is both an environmental pollutant and a threat to human health. However, the effects of Ni on the central nervous system in susceptible populations have not been well established. In the present study, the neurotoxicity of Ni and its underlying mechanism were investigated in vivo and in vitro. Ni exposure through drinking water (10 mg Ni/L, 12 weeks) caused learning and memory impairment in mice. Reduced dendrite complexity was observed in both Ni-exposed mouse hippocampi and Ni-treated (200 μM, 72 h) primary cultured hippocampal neurons. The levels of histone acetylation, especially at histone H3 lysine 9 (H3K9ac), were reduced in Ni-exposed mouse hippocampi and cultured neurons. RNA sequencing and chromatin immunoprecipitation (ChIP) sequencing analyses revealed that H3K9ac-modulated gene expression were downregulated. Treatment with sodium butyrate, a histone deacetylase inhibitor, attenuated Ni-induced H3K9 hypoacetylation, neural gene downregulation and dendrite complexity reduction in cultured neurons. Sodium butyrate also restored Ni-induced memory impairment in mice. These results indicate that Ni-induced H3K9 hypoacetylation may be a contributor to the neurotoxicity of Ni. The finding that Ni disturbs histone acetylation in the nervous system may provide new insight into the health risk of chronic Ni exposure.
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Affiliation(s)
- Chao Zhou
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Mengyu Liu
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China; Department of Medical Laboratory, General Hospital of the Central Theater Command of the Chinese People's Liberation Army, 430070 Wuhan, People's Republic of China
| | - Xiang Mei
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Qian Li
- Department of Otolaryngology Head and Neck Surgery, Xinqiao Hospital, Army Medical University, 400037 Chongqing, People's Republic of China
| | - Wenjuan Zhang
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Ping Deng
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Zhixin He
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Yu Xi
- Department of Environmental Medicine, School of Public Health, Department of Emergency Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, 310058 Hangzhou, People's Republic of China
| | - Tong Tong
- Department of Environmental Medicine, School of Public Health, Department of Emergency Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, 310058 Hangzhou, People's Republic of China
| | - Huifeng Pi
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Yonghui Lu
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Chunhai Chen
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Lei Zhang
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China
| | - Zhengping Yu
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China.
| | - Zhou Zhou
- Department of Environmental Medicine, School of Public Health, Department of Emergency Medicine, First Affiliated Hospital, School of Medicine, Zhejiang University, 310058 Hangzhou, People's Republic of China.
| | - Mindi He
- Department of Occupational Health, Army Medical University, 400038 Chongqing, People's Republic of China.
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18
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Mokhtar HEL, Hulail MAE, Mahmoud SM, Yousef DM. Impact of cisplatin administration on cerebellar cortical structure and locomotor activity of infantile and juvenile albino rats: the role of oxidative stress. Anat Sci Int 2021; 97:30-47. [PMID: 34386931 DOI: 10.1007/s12565-021-00624-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/01/2021] [Indexed: 11/30/2022]
Abstract
The central neurotoxicity of cisplatin (CisPt) has always raised questions especially during development, but few studies are available. Hence, this work was designed to assess the CisPt's impacts on the postnatal rat cerebellum via evaluation of locomotor activity, histological and immunohistochemical studies, and to focus on cerebellar oxidative stress-related alterations. Eighty newborn pups were divided into 2 equal experimental groups: the control group was kept without any treatment and CisPt-treated group received a single subcutaneous injection of CisPt (5 μg /g b.w.) in their nape at PD10. Ten rats at PD11, PD17, and PD30 ages were weighed, then deeply anesthetized and sacrificed. For locomotor assessment, 20 pups were divided equally into control and CisPt-treated groups and tested at PD11-13, PD15-17, and PD28-30 ages. CisPt-treated rats suffered from decreased motor activity and showed decreased body and cerebellar weights, reduced levels of enzymatic antioxidants (SOD and CAT), and non-enzymatic antioxidant defense (GSH), and increase of lipid peroxidation marker (MDA). Histopathologically, CisPt sowed deleterious changes within cerebellar cortical layers in the form of vacuolations, decreased thickness, and hemorrhage (in PD17), while Purkinje cells exhibited profound degenerative changes in the form of swelling, disrupted arrangement, distortion, and nuclear shrinkage. In CisPt-treated rats, GFAP demonstrated upregulated, hypertrophied, and branched Bergmann glial fibers and reactive astrogliosis. Immuno-localization of Ki-67-positive cells revealed defective migration associated with decreased proliferation in early ages in addition to glial proliferation in PD30. In conclusion, CisPt causes oxidative stress-related deleterious effects on structure of developing cerebellar cortex and affects locomotor activity.
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Affiliation(s)
- Hanan E L Mokhtar
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohey A E Hulail
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Samar Mortada Mahmoud
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
| | - Doaa Mohammed Yousef
- Human Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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19
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Gerber LS, van Melis LVJ, van Kleef RGDM, de Groot A, Westerink RHS. Culture of Rat Primary Cortical Cells for Microelectrode Array (MEA) Recordings to Screen for Acute and Developmental Neurotoxicity. Curr Protoc 2021; 1:e158. [PMID: 34152700 DOI: 10.1002/cpz1.158] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Neurotoxicity testing of chemicals, drug candidates, and environmental pollutants still relies on extensive in vivo studies that are very costly, time-consuming, and ethically debated due to the large number of animals typically used. Currently, rat primary cortical cultures are widely used for in vitro neurotoxicity studies, as they closely resemble the in vitro brain with respect to the diversity of cell types, their physiological functions, and the pathological processes that they undergo. Common in vitro assays for neurotoxicity screening often focus on very target-specific endpoints such as morphological, biochemical, or electrophysiological changes, and such narrow focus can hamper translation and interpretation. Microelectrode array (MEA) recordings provide a non-invasive platform for extracellular recording of electrical activity of cultured neuronal cells, thereby enabling the evaluation of changes in neuronal (network) function as a sensitive and integrated endpoint for neurotoxicity screening. Here, we describe an in vitro approach for assessing changes in neuronal network function as a measure for neurotoxicity, using rat primary cortical cultures grown on MEAs. We provide a detailed protocol for the culture of rat primary cortical cells, and describe several experimental procedures to address acute, subchronic, and chronic exposure scenarios. We additionally describe the steps for processing and analyzing MEA and cell viability data. © 2021 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Isolation and culture of rat primary cortical cells on 48-well MEA plates Support Protocol 1: Pretreatment and washing of 48-well MEA plates before first use or for re-use Support Protocol 2: Coating of 48-well MEA plates with 0.1% PEI solution Basic Protocol 2: MEA measurements during acute exposure Alternate Protocol 1: MEA measurements during subchronic exposure Alternate Protocol 2: MEA measurements during chronic exposure Support Protocol 3: Determination of cell viability after MEA experiments Basic Protocol 3: MEA data processing Basic Protocol 4: Analyzing MEA experiments after acute and subchronic exposure Alternate Protocol 3: Analyzing MEA experiments after chronic exposure.
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Affiliation(s)
- Lora-Sophie Gerber
- Neurotoxicology Research Group, Toxicology Division, Institute for Risk Assessment Sciences (IRAS), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Lennart V J van Melis
- Neurotoxicology Research Group, Toxicology Division, Institute for Risk Assessment Sciences (IRAS), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Regina G D M van Kleef
- Neurotoxicology Research Group, Toxicology Division, Institute for Risk Assessment Sciences (IRAS), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Aart de Groot
- Neurotoxicology Research Group, Toxicology Division, Institute for Risk Assessment Sciences (IRAS), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Remco H S Westerink
- Neurotoxicology Research Group, Toxicology Division, Institute for Risk Assessment Sciences (IRAS), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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Nanoparticle-mediated convection-enhanced delivery of a DNA intercalator to gliomas circumvents temozolomide resistance. Nat Biomed Eng 2021; 5:1048-1058. [PMID: 34045730 PMCID: PMC8497438 DOI: 10.1038/s41551-021-00728-7] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 04/12/2021] [Indexed: 02/01/2023]
Abstract
In patients with glioblastoma, resistance to the chemotherapeutic temozolomide (TMZ) limits any survival benefits conferred by the drug. Here we show that the convection-enhanced delivery of nanoparticles containing disulfide bonds (which are cleaved in the reductive environment of the tumour) and encapsulating an oxaliplatin prodrug and a cationic DNA intercalator inhibit the growth of TMZ-resistant cells from patient-derived xenografts, and hinder the progression of TMZ-resistant human glioblastoma tumours in mice without causing any detectable toxicity. Genome-wide RNA profiling and metabolomic analyses of a glioma cell line treated with the cationic intercalator or with TMZ showed substantial differences in the signalling and metabolic pathways altered by each drug. Our findings suggest that the combination of anticancer drugs with distinct mechanisms of action with selective drug release and convection-enhanced delivery may represent a translational strategy for the treatment of TMZ-resistant gliomas.
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21
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Boyina R, Dodoala S. Neurodevelopmental Toxic Effects of Food Additives Used in Energy Drinks on Developing Rats. PHARMACEUTICAL SCIENCES 2020. [DOI: 10.34172/ps.2020.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background: Food additives are widely used in energy drinks and when taken above acceptable daily intake leads to various neurodevelopmental toxic effects. The present study aimed to evaluate the neurodevelopmental toxic effects in rat pups after pre and postnatal administration of selected food additives in pregnant animals. Methods: Pregnant rats aged 160-180 days were divided into six groups with four animals per group. Group 1 treated with vehicle, group 2 standard (caffeine 25 mg/kg p.o.), groups 3-6 were treated with glucuronolactone (5 mg/kg p.o.), taurine (8 mg/kg p.o.), gluconolactone (84 mg/kg p.o.), and combination of food additives respectively till postnatal day (PND) 15. After PND 21, pups were evaluated for neurobehavioural parameters using the behavioral alteration test, Morris water maze test, locomotor activity test, Y-maze test, hot plate latency and neurobehavioural scoring. Neurotransmitters were estimated in brain tissue extract on PND 30, 45 and 60 and histological observations were examined in the brain cortex region. Results: Food additive treated groups showed an increase in behavioral activity, escape latency, immobility, percentage of alterations, hot plate latency and neurobehavioural scoring at selected dose and combination compared to control (p<0.001). The decrease in neurotransmitter levels in the brain and marked degeneration of neurons in the cortex were observed significantly in group6 pups. Conclusion: The present results corroborate that food additives in combination induced neurodevelopmental toxic effects further mechanistic studies are suggested to understand the synergistic effect.
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Affiliation(s)
- Revathi Boyina
- Department of Pharmacology, MLR Institute of Pharmacy, Affiliated to Jawaharlal Nehru University, Hyderabad, Telangana 500043. India
| | - Sujatha Dodoala
- Department of Pharmacology, Institute of Pharmaceutical Technology, Sri Padmavati Mahila Visvavidyalayam University, Tirupati- 517502, Andhra Pradesh, India
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22
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Guo SY, Zhang Y, Zhu XY, Zhou JL, Li J, Li CQ, Wu LR. Developmental neurotoxicity and toxic mechanisms induced by olaquindox in zebrafish. J Appl Toxicol 2020; 41:549-560. [PMID: 33111391 DOI: 10.1002/jat.4062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/13/2020] [Accepted: 08/17/2020] [Indexed: 12/30/2022]
Abstract
Olaquindox (OLA) has been widely used as an animal feed additive in China for decades; however, its toxicity and toxic mechanisms have not been well investigated. In this study, the developmental neurotoxicity and toxic mechanisms of OLA were evaluated in zebrafish. Zebrafish embryos were exposed to different concentrations of OLA (25-1,000 mg/L) from 6 to 120 hours post fertilization (hpf). OLA exposure resulted in many abnormal phenotypes in zebrafish, including shortened body length, notochord degeneration, spinal curvature, brain apoptosis, damage of axon and peripheral motor neuron, and hepatotoxicity. Interestingly, OLA increased zebrafish spontaneous tail coiling, while reduced locomotor capacity. Quantitative polymerase chain reaction (Q-PCR) showed that the expression levels of nine marker genes for nervous system functions or development, namely, α1-tubulin, glial fibrillary acidic protein (gfap), myelin basic protein (mbp), synapsinII a (syn2a), sonic hedgehog a (shha), encoding HuC (elavl3), mesencephalic astrocyte-derived neurotrophic factor (manf) growth associated protein 43 (gap43), and acetylcholinesterase (ache) were all down-regulated significantly in zebrafish after treated with OLA. Besides, the anti-apoptotic and pro-apoptotic genes bcl-2/bax ratio was reduced. These results show that OLA exposure could cause severe developmental neurotoxicity in the early stages of zebrafish life and OLA might induce neurotoxicity by inhibiting the expression of neuro-developmental genes and promoting apoptosis.
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Affiliation(s)
- Sheng-Ya Guo
- School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Binwen Road, Hangzhou, 310053, China.,Research and Development Department, Hunter Biotechnology, Inc., Jiangling Road, Hangzhou, 310051, China
| | - Yong Zhang
- Research and Development Department, Hunter Biotechnology, Inc., Jiangling Road, Hangzhou, 310051, China
| | - Xiao-Yu Zhu
- Research and Development Department, Hunter Biotechnology, Inc., Jiangling Road, Hangzhou, 310051, China
| | - Jia-Li Zhou
- Research and Development Department, Hunter Biotechnology, Inc., Jiangling Road, Hangzhou, 310051, China
| | - Jiao Li
- Research and Development Department, Hunter Biotechnology, Inc., Jiangling Road, Hangzhou, 310051, China
| | - Chun-Qi Li
- Research and Development Department, Hunter Biotechnology, Inc., Jiangling Road, Hangzhou, 310051, China.,Research and Development Department, New Hunter Testing and Technology Co., Ltd, Xinjinhu Road, Nanjing, 210046, China
| | - Li-Ren Wu
- Laboratory Animal Regulatory Center, Hangzhou Medical College, Tianmushan Road, Hangzhou, 310013, China
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23
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Kay VR, Rätsep MT, Figueiró-Filho EA, Croy BA. Preeclampsia may influence offspring neuroanatomy and cognitive function: a role for placental growth factor†. Biol Reprod 2020; 101:271-283. [PMID: 31175349 DOI: 10.1093/biolre/ioz095] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/30/2019] [Accepted: 06/06/2019] [Indexed: 01/01/2023] Open
Abstract
Preeclampsia (PE) is a common pregnancy complication affecting 3-5% of women. Preeclampsia is diagnosed clinically as new-onset hypertension with associated end organ damage after 20 weeks of gestation. Despite being diagnosed as a maternal syndrome, fetal experience of PE is a developmental insult with lifelong cognitive consequences. These cognitive alterations are associated with distorted neuroanatomy and cerebrovasculature, including a higher risk of stroke. The pathophysiology of a PE pregnancy is complex, with many factors potentially able to affect fetal development. Deficient pro-angiogenic factor expression is one aspect that may impair fetal vascularization, alter brain structure, and affect future cognition. Of the pro-angiogenic growth factors, placental growth factor (PGF) is strongly linked to PE. Concentrations of PGF are inappropriately low in maternal blood both before and during a PE gestation. Fetal concentrations of PGF appear to mirror maternal circulating concentrations. Using Pgf-/- mice that may model effects of PE on offspring, we demonstrated altered central nervous system vascularization, neuroanatomy, and behavior. Overall, we propose that development of the fetal brain is impaired in PE, making the offspring of preeclamptic pregnancies a unique cohort with greater risk of altered cognition and cerebrovasculature. These individuals may benefit from early interventions, either pharmacological or environmental. The early neonatal period may be a promising window for intervention while the developing brain retains plasticity.
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Affiliation(s)
- Vanessa R Kay
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Matthew T Rätsep
- Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | | | - B Anne Croy
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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24
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Gauthier PT, Holloway AC, Vijayan MM. Vape flavourants dull sensory perception and cause hyperactivity in developing zebrafish embryos. Biol Lett 2020; 16:20200361. [PMID: 32961088 DOI: 10.1098/rsbl.2020.0361] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
E-cigarette use (vaping) during pregnancy has been increasing, and the potential exists for the developing brain in utero to be exposed to chemical constituents in the vape. Vapes come in over 7000 unique flavours with and without nicotine, and while nicotine is a known neurotoxicant, the effects of vape flavouring alone, in the absence of nicotine, on brain function are not well understood. Here, we performed a screen of vape aerosol extracts (VAEs) to determine the potential for prenatal neurotoxicity using the zebrafish embryo photomotor response (PMR)-a translational biosensor of neurobehavioural effects. We screened three commonly used aerosolized vape liquids (flavoured and flavourless) either with or without nicotine. No neurobehavioural effects were detected in flavourless, nicotine-free VAEs, while the addition of nicotine to this VAE dulled sensory perception. Flavoured nicotine-free VAEs also dulled sensory perception and caused hyperactivity in zebrafish embryos. The combination of flavour and nicotine produced largely additive effects. Flavoured VAEs without nicotine had similar neuroactive potency to nicotine. Together, using zebrafish PMR as a high throughput translational behavioural model for prenatal exposure, our results demonstrate that e-cigarette flavourants that we screened elicit neurobehavioural effects worthy of further investigation for long-term neurotoxic potential and also have the potential to modulate nicotine impact on the developing brain.
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Affiliation(s)
- Patrick T Gauthier
- Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, AB T2N 1N4, Canada
| | - Alison C Holloway
- Department of Obstetrics and Gynecology, McMaster University, Hamilton, ON L8S 4K1, Canada
| | - Mathilakath M Vijayan
- Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, AB T2N 1N4, Canada
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25
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Wahle T, Sofranko A, Dekkers S, Miller MR, Heusinkveld HJ, Albrecht C, Cassee FR, Schins RP. Evaluation of neurological effects of cerium dioxide nanoparticles doped with different amounts of zirconium following inhalation exposure in mouse models of Alzheimer's and vascular disease. Neurochem Int 2020; 138:104755. [PMID: 32422323 PMCID: PMC7397505 DOI: 10.1016/j.neuint.2020.104755] [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] [Received: 12/18/2019] [Revised: 05/04/2020] [Accepted: 05/11/2020] [Indexed: 12/15/2022]
Abstract
Increasing evidence from toxicological and epidemiological studies indicates that the brain is an important target for ambient (ultrafine) particles. Disturbance of redox-homeostasis and inflammation in the brain are proposed as possible mechanisms that can contribute to neurotoxic and neurodegenerative effects. Whether and how engineered nanoparticles (NPs) may cause neurotoxicity and promote neurodegenerative diseases such as Alzheimer's disease (AD) is largely unstudied. We have assessed the neurological effects of subacute inhalation exposures (4 mg/m3 for 3 h/day, 5 days/week for 4 weeks) to cerium dioxide (CeO2) NPs doped with different amounts of zirconium (Zr, 0%, 27% and 78%), to address the influence of particle redox-activity in the 5xFAD transgenic mouse model of AD. Four weeks post-exposure, effects on behaviour were evaluated and brain tissues were analysed for amyloid-β plaque formation and reactive microglia (Iba-1 staining). Behaviour was also evaluated in concurrently exposed non-transgenic C57BL/6J littermates, as well as in Western diet-fed apolipoprotein E-deficient (ApoE-/-) mice as a model of vascular disease. Markers of inflammation and oxidative stress were evaluated in brain cortex. The brains of the NP-exposed 5xFAD mice revealed no accelerated amyloid-β plaque formation. No significant treatment-related behaviour impairments were observed in the healthy C57BL/6J mice. In the 5xFAD and ApoE-/- models, the NP inhalation exposures did not affect the alternation score in the X-maze indicating absence of spatial working memory deficits. However, following inhalation exposure to the 78% Zr-doped CeO2 NPs changes in forced motor performance (string suspension) and exploratory motor activity (X-maze) were observed in ApoE-/- and 5xFAD mice, respectively. Exposure to the 78% doped NPs also caused increased cortical expression of glial fibrillary acidic protein (GFAP) in the C57BL/6J mice. No significant treatment-related changes neuroinflammation and oxidative stress were observed in the 5xFAD and ApoE-/- mice. Our study findings reveal that subacute inhalation exposure to CeO2 NPs does not accelerate the AD-like phenotype of the 5xFAD model. Further investigation is warranted to unravel whether the redox-activity dependent effects on motor activity as observed in the mouse models of AD and vascular disease result from specific neurotoxic effects of these NPs.
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Affiliation(s)
- Tina Wahle
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Adriana Sofranko
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Susan Dekkers
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Mark R. Miller
- Centre for Cardiovascular Science & Centre for Inflammation Research, University of Edinburgh, Edinburgh, United Kingdom
| | - Harm J. Heusinkveld
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany,National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Catrin Albrecht
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Flemming R. Cassee
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands,Institute for Risk Assessment Sciences, Faculty of Science, Utrecht University, Utrecht, the Netherlands
| | - Roel P.F. Schins
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany,Corresponding author. IUF-Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany.
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26
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Tao J, Bai C, Chen Y, Zhou H, Liu Y, Shi Q, Pan W, Dong H, Li L, Xu H, Tanguay R, Huang C, Dong Q. Environmental relevant concentrations of benzophenone-3 induced developmental neurotoxicity in zebrafish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 721:137686. [PMID: 32169642 DOI: 10.1016/j.scitotenv.2020.137686] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/04/2020] [Accepted: 03/01/2020] [Indexed: 06/10/2023]
Abstract
Benzophenone-3 (BP3 or oxybenzone) is an organic UV filter that has been widely used in personal care products. Its frequent detection in the environment and humans as well as its structural similarity to estradiol have prompted most research focus on its endocrine effect. However, these effects are usually associated with concentrations 10-100 fold higher than its environmental relevant concentrations. Few studies explore its adverse effects at environmental relevant concentrations. In the present study, we evaluated the developmental neurotoxic (DNT) effects of low concentration BP3 exposure during a sensitive developmental window in zebrafish. Our findings revealed that BP3 exposure at 10 μg/L (0.04 μM) during 6-24 h post fertilization (hpf) led to various DNT effects such as increased spontaneous movement at 21 and 24 hpf, decreased touch response at 27 hpf, heightened hyperactivity in locomotor response at 5 day post fertilization (dpf), decreased shoaling behavior at 11 dpf and decreased mirror attacks at 12 dpf. These effects were accompanied with decreased axonal growth at 27 hpf, decreased cell proliferation and increased cell apoptosis in the head region of larval zebrafish immediately after BP3 exposure at 24 hpf, and increased expression of retinoid X receptor gene rxrgb at 5 dpf. Interestingly, rxrgb knockdown through morpholino injection largely restored most of BP3-induced DNT effects, axonal growth delay, cell proliferation and cell apoptosis, suggesting that BP3-induced DNT effects are likely mediated through the Rxrgb receptor. In considering with recent findings on the endocrine effects of BP3, we conclude that BP3 at environmental relevant concentrations has limited estrogenic effect, but is neurotoxic to developing embryos in zebrafish.
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Affiliation(s)
- Junyan Tao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Chenglian Bai
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Yuanhong Chen
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Huanhuan Zhou
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Yahui Liu
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Qingyu Shi
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Wenhao Pan
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Haojia Dong
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Luyi Li
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China
| | - Hui Xu
- The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, China
| | - Robyn Tanguay
- Sinnhuber Aquatic Research Laboratory, Department of Environmental & Molecular Toxicology, Oregon State University, 1007 Agriculture & Life Sciences Building, Corvallis, OR 97331, United States of America
| | - Changjiang Huang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China.
| | - Qiaoxiang Dong
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China; Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Institute of Environmental Safety and Human Health, Wenzhou Medical University, Wenzhou 325035, China; The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325035, China.
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27
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Li M, Zhu J, Fang H, Wang M, Wang Q, Zhou B. Coexposure to environmental concentrations of cis-bifenthrin and graphene oxide: Adverse effects on the nervous system during metamorphic development of Xenopus laevis. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120995. [PMID: 31425913 DOI: 10.1016/j.jhazmat.2019.120995] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 08/06/2019] [Accepted: 08/10/2019] [Indexed: 06/10/2023]
Abstract
Despite the great concerns associated with the combined biological effects of nanoparticles and insecticides, the current understanding of the corresponding ecological risks remains limited. Xenopus laevis (X. laevis) tadpoles were exposed to various concentrations of typical pyrethroid (cis-bifenthrin; cis-BF), either alone or in combination with graphene oxide (GO), for 21 days. The presence of GO resulted in increased bioconcentration of cis-BF and a higher 1S-enantiomer fraction. Exposure to cis-BF and GO caused further reduction in pre-metamorphic developmental rates and activated dopaminergic, noradrenergic, and serotonergic neurotransmitter systems. Reduced tadpole activity and levels of genomic DNA methylation at cytosine nucleotides (5hmC) were observed in the coexposure groups. These results indicate that GO enhance the bioconcentration of cis-BF and promote the conversion of its 1R-enantiomer to the 1S form, which lead to disruption of neurotransmitter systems as well as interference in metamorphic development.
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Affiliation(s)
- Meng Li
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Jiaping Zhu
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Hua Fang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Mengcen Wang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China
| | - Qiangwei Wang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China.
| | - Bingsheng Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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28
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Gulinello M, Mitchell HA, Chang Q, Timothy O'Brien W, Zhou Z, Abel T, Wang L, Corbin JG, Veeraragavan S, Samaco RC, Andrews NA, Fagiolini M, Cole TB, Burbacher TM, Crawley JN. Rigor and reproducibility in rodent behavioral research. Neurobiol Learn Mem 2019; 165:106780. [PMID: 29307548 PMCID: PMC6034984 DOI: 10.1016/j.nlm.2018.01.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/22/2017] [Accepted: 01/03/2018] [Indexed: 01/08/2023]
Abstract
Behavioral neuroscience research incorporates the identical high level of meticulous methodologies and exacting attention to detail as all other scientific disciplines. To achieve maximal rigor and reproducibility of findings, well-trained investigators employ a variety of established best practices. Here we explicate some of the requirements for rigorous experimental design and accurate data analysis in conducting mouse and rat behavioral tests. Novel object recognition is used as an example of a cognitive assay which has been conducted successfully with a range of methods, all based on common principles of appropriate procedures, controls, and statistics. Directors of Rodent Core facilities within Intellectual and Developmental Disabilities Research Centers contribute key aspects of their own novel object recognition protocols, offering insights into essential similarities and less-critical differences. Literature cited in this review article will lead the interested reader to source papers that provide step-by-step protocols which illustrate optimized methods for many standard rodent behavioral assays. Adhering to best practices in behavioral neuroscience will enhance the value of animal models for the multiple goals of understanding biological mechanisms, evaluating consequences of genetic mutations, and discovering efficacious therapeutics.
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Affiliation(s)
- Maria Gulinello
- IDDRC Behavioral Core Facility, Neuroscience Department, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Heather A Mitchell
- IDD Models Core, Waisman Center, University of Wisconsin Madison, Madison, WI 53705, USA
| | - Qiang Chang
- IDD Models Core, Waisman Center, University of Wisconsin Madison, Madison, WI 53705, USA
| | - W Timothy O'Brien
- IDDRC Preclinical Models Core, Children's Hospital of Philadelphia and University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Zhaolan Zhou
- IDDRC Preclinical Models Core, Children's Hospital of Philadelphia and University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Ted Abel
- IDDRC Preclinical Models Core, Children's Hospital of Philadelphia and University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Current affiliation: Iowa Neuroscience Institute, University of Iowa, Iowa City, IA 52242, USA
| | - Li Wang
- IDDRC Neurobehavioral Core, Center for Neuroscience Research, Children's National Health System, Washington, DC 20010, USA
| | - Joshua G Corbin
- IDDRC Neurobehavioral Core, Center for Neuroscience Research, Children's National Health System, Washington, DC 20010, USA
| | - Surabi Veeraragavan
- IDDRC Neurobehavioral Core, Baylor College of Medicine, Houston, TX 77030, USA
| | - Rodney C Samaco
- IDDRC Neurobehavioral Core, Baylor College of Medicine, Houston, TX 77030, USA
| | - Nick A Andrews
- IDDRC Neurodevelopmental Behavior Core, Boston Children's Hospital, Boston, MA 02115, USA
| | - Michela Fagiolini
- IDDRC Neurodevelopmental Behavior Core, Boston Children's Hospital, Boston, MA 02115, USA
| | - Toby B Cole
- IDDRC Rodent Behavior Laboratory, Center on Human Development and Disability, University of Washington, Seattle, WA 98195, USA
| | - Thomas M Burbacher
- IDDRC Rodent Behavior Laboratory, Center on Human Development and Disability, University of Washington, Seattle, WA 98195, USA
| | - Jacqueline N Crawley
- IDDRC Rodent Behavior Core, MIND Institute, University of California Davis School of Medicine, Sacramento, CA 95817, USA.
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29
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Gauvin DV, Zimmermann ZJ, Dalton JA, Baird TJ, Kallman MJ. CNS Safety Screening Under ICH S7A Guidelines Requires Observations of Multiple Behavioral Units to Assess Motor Function. Int J Toxicol 2019; 38:339-356. [PMID: 31470748 DOI: 10.1177/1091581819864836] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In the adoption of behavior as a critical end point in safety pharmacology and neurotoxicity screening, federal regulatory agencies have shifted the predominating scientific perspective from pharmacology back to the experimental analysis of behavior (psychology). Nowhere is this more evident than in tier I safety assessment of the central nervous system (CNS). The CNS and peripheral nervous system have multiple behavioral units of general activity. A complete picture of the motor control neural pathways cannot be measured by any one single approach. The CNS safety protocols under International Council for Harmonization of Technical Requirements for Pharmaceuticals for Human Use S7A are required to be conducted in accordance with Good Laboratory Practices by trained technical staff. The CNS safety assessments necessitate the inclusion of a thorough and detailed behavioral analysis of home cage activity, the response to handling, and transportation to and observations within an open-field apparatus with ancillary measures of basal muscle tone, muscle strength, and tremor in a functional observation battery, as well as quantitative measurements of 3-dimensional activity in an automated photobeam arena. Cost-cutting initiatives or a radical application of the "reduce use" principle of the 3 Rs only jeopardize the spirit, intent, and predictive validity of tier I safety testing assays dictated by current drug safety guidelines.
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Affiliation(s)
- David V Gauvin
- Director, Neurobehavioral Sciences Department, CRL Laboratories, Inc, Mattawan, MI, USA
| | | | - Jill A Dalton
- Director, Safety Pharmacology Department, CRL Laboratories, Inc, Mattawan, MI, USA
| | - Theodore J Baird
- Senior Director Drug Safety, CRL Laboratories, Inc, Mattawan, MI, USA
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30
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Does Age Interfere With Gadolinium Toxicity and Presence in Brain and Bone Tissues?: A Comparative Gadoterate Versus Gadodiamide Study in Juvenile and Adult Rats. Invest Radiol 2019; 54:61-71. [PMID: 30394964 PMCID: PMC6310471 DOI: 10.1097/rli.0000000000000517] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The main objective of the study was to assess the effect of age on target tissue total gadolinium (Gd) retention after repeated administration of gadodiamide (linear) or gadoterate (macrocyclic) Gd-based contrast agent (GBCA) in rats. The secondary objective was to assess the potential developmental and long-term consequences of GBCA administration during neonatal and juvenile periods. MATERIALS AND METHODS A total of 20 equivalent human clinical doses (cumulated dose, 12 mmol Gd/kg) of either gadoterate or gadodiamide were administered concurrently by the intravenous route to healthy adult and juvenile rats. Saline was administered to juvenile rats forming the control group. In juvenile rats, the doses were administered from postnatal day 12, that is, once the blood-brain barrier is functional as in humans after birth. The tests were conducted on 5 juvenile rats per sex and per group and on 3 adult animals per sex and per group. T1-weighted magnetic resonance imaging of the cerebellum was performed at 4.7 T during both the treatment and treatment-free periods. Behavioral tests were performed in juvenile rats. Rats were euthanatized at 11 to 12 weeks (ie, approximately 3 months) after the last administration. Total Gd concentrations were measured in plasma, skin, bone, and brain by inductively coupled plasma mass spectrometry. Cerebellum samples from the juvenile rats were characterized by histopathological examination (including immunohistochemistry for glial fibrillary acidic protein or GFAP, and CD68). Lipofuscin pigments were also studied by fluorescence microscopy. All tests were performed blindly on randomized animals. RESULTS Transient skin lesions were observed in juvenile rats (5/5 females and 2/4 males) and not in adult rats having received gadodiamide. Persisting (up to completion of the study) T1 hyperintensity in the deep cerebellar nuclei (DCNs) was observed only in gadodiamide-treated rats. Quantitatively, a slightly higher progressive increase in the DCN/brain stem ratio was observed in adult rats compared with juvenile rats, whereas no difference was noted visually. In all tissues, total Gd concentrations were higher (10- to 30-fold higher) in the gadodiamide-treated groups than in the gadoterate groups. No age-related differences were observed except in bone marrow where total Gd concentrations in gadodiamide-treated juvenile rats were higher than those measured in adults and similar to those measured in cortical bone tissue. No significant treatment-related effects were observed in histopathological findings or in development, behavior, and biochemistry parameters. However, in the elevated plus maze test, a trend toward an anxiogenic effect was observed in the gadodiamide group compared with other groups (nonsignificant). Moreover, in the balance beam test, a high number of trials were excluded in the gadodiamide group because rats (mainly males) did not completely cross the beam, which may also reflect an anxiogenic effect. CONCLUSIONS No T1 hyperintensity was observed in the DCN after administration of the macrocyclic GBCA gadoterate regardless of age as opposed to administration of the linear GBCA gadodiamide. Repeated administration of gadodiamide in neonatal and juvenile rats resulted in similar total Gd retention in the skin, brain, and bone to that in adult rats with sex having no effect, whereas Gd distribution in bone marrow was influenced by age. Further studies are required to assess the form of the retained Gd and to investigate the potential risks associated with Gd retention in bone marrow in juvenile animals treated with gadodiamide. Regardless of age, total Gd concentration in the brain and bone was 10- to 30-fold higher after administration of gadodiamide compared with gadoterate.
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Keasling AW, Pandey P, Doerksen RJ, Pedrino GR, Costa EA, da Cunha LC, Zjawiony JK, Fajemiroye JO. Salvindolin elicits opioid system-mediated antinociceptive and antidepressant-like activities. J Psychopharmacol 2019; 33:865-881. [PMID: 31192780 DOI: 10.1177/0269881119849821] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Salvinorin A is known as a highly selective kappa opioid receptor agonist with antinociceptive but mostly pro-depressive effects. AIMS In this article, we present its new semisynthetic analog with preferential mu opioid affinity, and promising antinociceptive, as well as antidepressant-like activities. METHODS Competitive binding studies were performed for salvindolin with kappa opioid and mu opioid. The mouse model of nociception (acetic-acid-induced writhing, formalin, and hot plate tests), depression (forced swim and tail suspension tests), and the open field test, were used to evaluate antinociceptive, antidepressant-like, and locomotion effects, respectively, of salvindolin. We built a 3-D molecular model of the kappa opioid receptor, using a mu opioid X-ray crystal structure as a template, and docked salvindolin into the two proteins. RESULTS/OUTCOMES Salvindolin showed affinity towards kappa opioid and mu opioid receptors but with 100-fold mu opioid preference. Tests of salvindolin in mice revealed good oral bioavailability, antinociceptive, and antidepressive-like effects, without locomotor incoordination. Docking of salvindolin showed strong interactions with the mu opioid receptor which matched well with experimental binding data. Salvindolin-induced behavioral changes in the hot plate and forced swim tests were attenuated by naloxone (nonselective opioid receptor antagonist) and/or naloxonazine (selective mu opioid receptor antagonist) but not by nor-binaltorphimine (selective kappa opioid receptor antagonist). In addition, WAY100635 (a selective serotonin 1A receptor antagonist) blocked the antidepressant-like effect of salvindolin. CONCLUSIONS/INTERPRETATION By simple chemical modification, we were able to modulate the pharmacological profile of salvinorin A, a highly selective kappa opioid receptor agonist, to salvindolin, a ligand with preferential mu opioid receptor affinity and activity on the serotonin 1A receptor. With its significant antinociceptive and antidepressive-like activities, salvindolin has the potential to be an analgesic and/or antidepressant drug candidate.
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Affiliation(s)
- Adam W Keasling
- 1 Department of BioMolecular Sciences, Division of Pharmacognosy, University of Mississippi, University, MS, USA.,2 Department of BioMolecular Sciences, Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS, USA
| | - Pankaj Pandey
- 3 Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, University, MS, USA
| | - Robert J Doerksen
- 2 Department of BioMolecular Sciences, Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS, USA.,3 Department of BioMolecular Sciences, Division of Medicinal Chemistry, University of Mississippi, University, MS, USA
| | - Gustavo R Pedrino
- 4 Department of Physiology, Federal University of Goiás, Goiânia, Brazil
| | - Elson A Costa
- 5 Department of Pharmacology, Federal University of Goiás, Goiânia, Brazil
| | - Luiz C da Cunha
- 6 Center for Studies and Toxicological-Pharmacological Research, Federal University of Goiás, Goiânia, Brazil
| | - Jordan K Zjawiony
- 1 Department of BioMolecular Sciences, Division of Pharmacognosy, University of Mississippi, University, MS, USA.,2 Department of BioMolecular Sciences, Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS, USA
| | - James O Fajemiroye
- 5 Department of Pharmacology, Federal University of Goiás, Goiânia, Brazil.,6 Center for Studies and Toxicological-Pharmacological Research, Federal University of Goiás, Goiânia, Brazil.,7 Department of Pharmaceutical Science, University Center of Anápolis - Unievangélica, Anápolis, Brazil
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Methodological Aspects for Preclinical Evaluation of Gadolinium Presence in Brain Tissue: Critical Appraisal and Suggestions for Harmonization-A Joint Initiative. Invest Radiol 2019; 53:499-517. [PMID: 29659381 PMCID: PMC6092104 DOI: 10.1097/rli.0000000000000467] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Gadolinium (Gd)-based contrast agents (GBCAs) are pharmaceuticals that have been approved for 30 years and used daily in millions of patients worldwide. Their clinical benefits are indisputable. Recently, unexpected long-term presence of Gd in the brain has been reported by numerous retrospective clinical studies and confirmed in preclinical models particularly after linear GBCA (L-GBCA) compared with macrocyclic GBCA (M-GBCA). Even if no clinical consequences of Gd presence in brain tissue has been demonstrated so far, in-depth investigations on potential toxicological consequences and the fate of Gd in the body remain crucial to potentially adapt the clinical use of GBCAs, as done during the nephrogenic systemic fibrosis crisis. Preclinical models are instrumental in the understanding of the mechanism of action as well as the potential safety consequences. However, such models may be associated with risks of biases, often related to the protocol design. Selection of adequate terminology is also crucial. This review of the literature intends to summarize and critically discuss the main methodological aspects for accurate design and translational character of preclinical studies.
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Cheng G, Zhang Q, Pan J, Lee Y, Ouari O, Hardy M, Zielonka M, Myers CR, Zielonka J, Weh K, Chang AC, Chen G, Kresty L, Kalyanaraman B, You M. Targeting lonidamine to mitochondria mitigates lung tumorigenesis and brain metastasis. Nat Commun 2019; 10:2205. [PMID: 31101821 PMCID: PMC6525201 DOI: 10.1038/s41467-019-10042-1] [Citation(s) in RCA: 153] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 04/09/2019] [Indexed: 02/07/2023] Open
Abstract
Lung cancer often has a poor prognosis, with brain metastases a major reason for mortality. We modified lonidamine (LND), an antiglycolytic drug with limited efficacy, to mitochondria-targeted mito-lonidamine (Mito-LND) which is 100-fold more potent. Mito-LND, a tumor-selective inhibitor of oxidative phosphorylation, inhibits mitochondrial bioenergetics in lung cancer cells and mitigates lung cancer cell viability, growth, progression, and metastasis of lung cancer xenografts in mice. Mito-LND blocks lung tumor development and brain metastasis by inhibiting mitochondrial bioenergetics, stimulating the formation of reactive oxygen species, oxidizing mitochondrial peroxiredoxin, inactivating AKT/mTOR/p70S6K signaling, and inducing autophagic cell death in lung cancer cells. Mito-LND causes no toxicity in mice even when administered for eight weeks at 50 times the effective cancer inhibitory dose. Collectively, these findings show that mitochondrial targeting of LND is a promising therapeutic approach for investigating the role of autophagy in mitigating lung cancer development and brain metastasis.
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Affiliation(s)
- Gang Cheng
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Qi Zhang
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Jing Pan
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Yongik Lee
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Olivier Ouari
- Aix Marseille Univ, CNRS, ICR UMR 7273, 13013, Marseille, France
| | - Micael Hardy
- Aix Marseille Univ, CNRS, ICR UMR 7273, 13013, Marseille, France
| | - Monika Zielonka
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Charles R Myers
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Jacek Zielonka
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Katherine Weh
- Section of Thoracic Surgery, Department of Surgery, Rogel Cancer Center, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109, USA
| | - Andrew C Chang
- Section of Thoracic Surgery, Department of Surgery, Rogel Cancer Center, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109, USA
| | - Guoan Chen
- Section of Thoracic Surgery, Department of Surgery, Rogel Cancer Center, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109, USA
| | - Laura Kresty
- Section of Thoracic Surgery, Department of Surgery, Rogel Cancer Center, University of Michigan, 1500 East Medical Center Drive, Ann Arbor, MI, 48109, USA
| | - Balaraman Kalyanaraman
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA
| | - Ming You
- Center for Disease Prevention Research, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA.
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA.
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FOB vs modified Irwin: What are we doing? J Pharmacol Toxicol Methods 2019; 97:24-28. [DOI: 10.1016/j.vascn.2019.02.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 02/10/2019] [Accepted: 02/25/2019] [Indexed: 11/23/2022]
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35
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Ghosh D, Mondal S, Ramakrishna K. Acute and sub-acute (30-day) toxicity studies of Aegialitis rotundifolia Roxb., leaves extract in Wistar rats: safety assessment of a rare mangrove traditionally utilized as pain antidote. CLINICAL PHYTOSCIENCE 2019. [DOI: 10.1186/s40816-019-0106-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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36
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Izumi H, Ishimoto T, Yamamoto H, Mori H. Bioluminescence imaging of Arc expression in mouse brain under acute and chronic exposure to pesticides. Neurotoxicology 2019; 71:52-59. [DOI: 10.1016/j.neuro.2018.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 11/27/2018] [Accepted: 12/13/2018] [Indexed: 11/28/2022]
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37
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Montilla-García Á, Tejada MÁ, Ruiz-Cantero MC, Bravo-Caparrós I, Yeste S, Zamanillo D, Cobos EJ. Modulation by Sigma-1 Receptor of Morphine Analgesia and Tolerance: Nociceptive Pain, Tactile Allodynia and Grip Strength Deficits During Joint Inflammation. Front Pharmacol 2019; 10:136. [PMID: 30853912 PMCID: PMC6395397 DOI: 10.3389/fphar.2019.00136] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 02/06/2019] [Indexed: 12/31/2022] Open
Abstract
Sigma-1 receptor antagonism increases the effects of morphine on nociceptive pain, even in morphine-tolerant animals. However, it is unknown whether these receptors are able to modulate morphine antinociception and tolerance during inflammatory pain. Here we used a mouse model to test the modulation of morphine effects by the selective sigma-1 antagonist S1RA (MR309), by determining its effect on inflammatory tactile allodynia (von Frey filaments) and on grip strength deficits induced by joint inflammation (a measure of pain-induced functional disability), and compared the results with those for nociceptive heat pain recorded with the unilateral hot plate (55°C) test. The subcutaneous (s.c.) administration of morphine induced antinociceptive effects to heat stimuli, and restored mechanical threshold and grip strength in mice with periarticular inflammation induced by Complete Freund’s Adjuvant. S1RA (80 mg/kg, s.c.) administered alone did not induce any effect on nociceptive heat pain or inflammatory allodynia, but was able to partially reverse grip strength deficits. The association of S1RA with morphine, at doses inducing little or no analgesic-like effects when administered alone, resulted in a marked antinociceptive effect to heat stimuli and complete reversion of inflammatory tactile allodynia. However, S1RA administration did not increase the effect of morphine on grip strength deficits induced by joint inflammation. When S1RA (80 mg/kg, s.c.) was administered to morphine-tolerant animals, it rescued the analgesic-like effects of this opioid in all three pain measures. However, when S1RA was repeatedly given during the induction of morphine tolerance (and not on the day of behavioral evaluation) it failed to affect tolerance to the effects of morphine on nociceptive heat pain or inflammatory allodynia, but completely preserved the effects of this opioid on grip strength deficits. These effects of S1RA on morphine tolerance cannot be explained by pharmacokinetic interactions, given that the administration of S1RA did not modify concentrations of morphine or morphine-3-glucuronide (a major morphine metabolite) in morphine-tolerant animals in plasma or brain tissue. We conclude that sigma-1 receptors play a pivotal role in the control of morphine analgesia and tolerance in nociceptive and inflammatory pain, although in a manner dependent on the type of painful stimulus explored.
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Affiliation(s)
- Ángeles Montilla-García
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain
| | - Miguel Á Tejada
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain
| | - M Carmen Ruiz-Cantero
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain
| | - Inmaculada Bravo-Caparrós
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain
| | - Sandra Yeste
- Drug Discovery and Preclinical Development, ESTEVE, Barcelona, Spain
| | - Daniel Zamanillo
- Drug Discovery and Preclinical Development, ESTEVE, Barcelona, Spain
| | - Enrique J Cobos
- Department of Pharmacology, Faculty of Medicine, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain.,Institute of Neuroscience, The Biomedical Research Centre, University of Granada, Granada, Spain
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38
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Demers M, Suidan GL, Andrews N, Martinod K, Cabral JE, Wagner DD. Solid peripheral tumor leads to systemic inflammation, astrocyte activation and signs of behavioral despair in mice. PLoS One 2018; 13:e0207241. [PMID: 30439993 PMCID: PMC6237350 DOI: 10.1371/journal.pone.0207241] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 10/26/2018] [Indexed: 12/13/2022] Open
Abstract
Prevalence of depression is higher in patients with cancer than in the general population. Sustained systemic inflammation has been associated with depressive behavior and it has been reported that depressed patients commonly display alterations in their immune system. We previously showed that cancer in mice induces a systemic environment that promotes neutrophil activation and leukocytosis. We thus hypothesized that the peripheral systemic response to a solid tumor leads to endothelial activation, which may promote inflammatory changes in the brain with behavioral consequences. Using the Lewis lung carcinoma (LLC) model, we show that tumor growth induces a progressive increase in peripheral inflammation as observed by elevated interleukin-6 (IL-6). In behavioral studies, tumor-bearing mice showed no sign of motor, coordination or short term working memory deficits as assessed by rotarod, balance-beam, and novel object recognition tests. However, there was an impairment in the grip strength test and interestingly, an anxious and despair-like phenotype in the elevated plus-maze, and tail suspension tests, respectively. Immunostaining of perfused brains revealed fibrin accumulation in the vasculature with some leakage into the parenchyma, a process known to activate endothelial cells. Taken together, our results suggest that the inflamed and prothrombotic systemic environment created by the growth of a peripherally-located solid tumor induces endothelial activation, accumulation of fibrin in the brain and astrocyte activation, perhaps leading to depressive-like behavior.
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Affiliation(s)
- Melanie Demers
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Georgette L. Suidan
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail: (GLS); (DDW)
| | - Nick Andrews
- Kirby Neurobiology Center, Boston, Children’s Hospital and Department of Neurobiology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Kimberly Martinod
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Graduate Program in Immunology, Division of Medical Sciences, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jessica E. Cabral
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | - Denisa D. Wagner
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, Massachusetts, United States of America
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail: (GLS); (DDW)
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Dorman DC, Foster ML, Olesnevich B, Bolon B, Castel A, Sokolsky-Papkov M, Mariani CL. Toxicity associated with ingestion of a polyacrylic acid hydrogel dog pad. J Vet Diagn Invest 2018; 30:708-714. [PMID: 29888679 DOI: 10.1177/1040638718782583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Superabsorbent sodium polyacrylate polymeric hydrogels that retain large amounts of liquids are used in disposable diapers, sanitary napkins, and other applications. These polymers are generally considered "nontoxic" with acute oral median lethal doses (LD50) >5 g/kg. Despite this favorable toxicity profile, we identified a novel toxic syndrome in dogs and rats following the ingestion of a commercial dog pad composed primarily of a polyacrylic acid hydrogel. Inappropriate mentation, cerebellar ataxia, vomiting, and intention tremors were observed within 24 h after the ingestion of up to 15.7 g/kg of the hydrogel by an adult, castrated male Australian Shepherd mix. These observations prompted an experimental study in rats to further characterize the toxicity of the hydrogel. Adult, female Sprague Dawley rats ( n = 9) were assessed before and after hydrogel ingestion (2.6-19.2 g/kg over 4 h) using a functional observation battery and spontaneous motor activity. Clinical signs consistent with neurotoxicity emerged in rats as early as 2 h after the end of hydrogel exposure, including decreased activity in an open field, hunched posture, gait changes, reduced reaction to handling, decreased muscle tone, and abnormal surface righting. Hydrogel-exposed rats also had reduced motor activity when compared with pre-exposure baseline data. Rats that ingested the hydrogel did not develop nervous system lesions. These findings support the conclusion that some pet pad hydrogel products can induce acute neurotoxicity in animals under high-dose exposure conditions.
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Affiliation(s)
- David C Dorman
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
| | - Melanie L Foster
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
| | - Brooke Olesnevich
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
| | - Brad Bolon
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
| | - Aude Castel
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
| | - Marina Sokolsky-Papkov
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
| | - Christopher L Mariani
- Departments of Molecular Biomedical Sciences (Dorman, Olesnevich), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,Clinical Sciences (Castel, Foster, Mariani), College of Veterinary Medicine, North Carolina State University, Raleigh, NC.,GEMpath Inc., Longmont, CO (Bolon).,Center for Nanotechnology in Drug Delivery, University of North Carolina-Chapel Hill, Chapel Hill, NC (Sokolsky-Papkov)
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Resveratrol Prevents the Cellular Damages Induced by Monocrotophos via PI3K Signaling Pathway in Human Cord Blood Mesenchymal Stem Cells. Mol Neurobiol 2018. [PMID: 29526017 DOI: 10.1007/s12035-018-0986-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The role of resveratrol (RV) as a neuroprotectant is well recognized, and cellular molecules involved in imparting the physiological effect have been well illustrated. However, some ambiguity still prevails as the specific receptor, and downstream signaling molecules are not yet clearly stated. So, we investigated the signaling pathway(s) involved in its cellular protection in the human umbilical cord blood mesenchymal stem cell (hUCB-MSC) derived neuronal cells. The mesenchymal stem cells were exposed to various concentrations (10, 100, 1000 μM) of monocrotophos (MCP), a known developmental neurotoxic organophosphate pesticide, for a period of 24 h. The MAPK signaling pathways (JNK, p38, and ERK) known to be associated with MCP-induced damages were also taken into consideration to identify the potential connection. The biological safe dose of RV (10 μM) shows a significant restoration in the MCP-induced alterations. Under the specific growth conditions, RV exposure was found to promote neuronal differentiation in the hUCB-MSCs. The exposure of cells to a specific pharmacological inhibitor (LY294002) of PI3K confirms the significant involvement of PI3K-mediated pathway in the ameliorative responses of RV against MCP exposure. Our data identifies the substantial role of RV in the restoration of MCP-induced cellular damages, thus proving to have a therapeutic potential against organophosphate pesticide-induced neurodegeneration.
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Llorens J, Callejo A, Greguske EA, Maroto AF, Cutillas B, Martins-Lopes V. Physiological assesment of vestibular function and toxicity in humans and animals. Neurotoxicology 2018; 66:204-212. [PMID: 29428870 DOI: 10.1016/j.neuro.2018.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 01/29/2018] [Accepted: 02/04/2018] [Indexed: 01/15/2023]
Abstract
Physiological methods that can be similarly recorded in humans and animals have a major role in sensory toxicology, as they provide a bridge between human sensory perception data and the molecular and cellular data obtained in animal studies. Vestibular toxicity research lags well behind other sensory systems in many aspects, including the availability of methods for functional assessment in animals that could be robustly translated to human significance. Here we review the methods available for the assessment of vestibular function in both humans and laboratory animals, with an emphasis on their similarity or divergence, to highlight their potential utility for the predictive assessment of vestibular toxicity.
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Affiliation(s)
- Jordi Llorens
- Department de Ciències Fisiològiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08907 Hospitalet de Llobregat, Catalonia, Spain; Institute of Neuroscience, Universitat de Barcelona, Catalonia, Spain; Institut d'Investigació Biomèdica de Bellvitge, IDIBELL, 08907 Hospitalet de Llobregat, Catalonia, Spain.
| | - Angela Callejo
- Department de Ciències Fisiològiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08907 Hospitalet de Llobregat, Catalonia, Spain
| | - Erin A Greguske
- Department de Ciències Fisiològiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08907 Hospitalet de Llobregat, Catalonia, Spain; Institute of Neuroscience, Universitat de Barcelona, Catalonia, Spain; Institut d'Investigació Biomèdica de Bellvitge, IDIBELL, 08907 Hospitalet de Llobregat, Catalonia, Spain
| | - Alberto F Maroto
- Department de Ciències Fisiològiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08907 Hospitalet de Llobregat, Catalonia, Spain
| | - Blanca Cutillas
- Institut d'Investigació Biomèdica de Bellvitge, IDIBELL, 08907 Hospitalet de Llobregat, Catalonia, Spain; Department d'Infermeria Fonamental i Medicoquirúrgica, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08907 Hospitalet de Llobregat, Catalonia, Spain
| | - Vanessa Martins-Lopes
- Department de Ciències Fisiològiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, 08907 Hospitalet de Llobregat, Catalonia, Spain
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Toivanen M, Pelkonen A, Mäkinen M, Ylä-Outinen L, Sukki L, Kallio P, Ristola M, Narkilahti S. Optimised PDMS Tunnel Devices on MEAs Increase the Probability of Detecting Electrical Activity from Human Stem Cell-Derived Neuronal Networks. Front Neurosci 2017; 11:606. [PMID: 29163011 PMCID: PMC5671636 DOI: 10.3389/fnins.2017.00606] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 10/17/2017] [Indexed: 12/22/2022] Open
Abstract
Measurement of the activity of human pluripotent stem cell (hPSC)-derived neuronal networks with microelectrode arrays (MEAs) plays an important role in functional in vitro brain modelling and in neurotoxicological screening. The previously reported hPSC-derived neuronal networks do not, however, exhibit repeatable, stable functional network characteristics similar to rodent cortical cultures, making the interpretation of results difficult. In earlier studies, microtunnels have been used both to control and guide cell growth and amplify the axonal signals of rodent neurons. The aim of the current study was to develop tunnel devices that would facilitate signalling and/or signal detection in entire hPSC-derived neuronal networks containing not only axons, but also somata and dendrites. Therefore, MEA-compatible polydimethylsiloxane (PDMS) tunnel devices with 8 different dimensions were created. The hPSC-derived neurons were cultured in the tunnel devices on MEAs, and the spontaneous electrical activity of the networks was measured for 5 weeks. Although the tunnel devices improved the signal-to-noise ratio only by 1.3-fold at best, they significantly increased the percentage of electrodes detecting neuronal activity (52–100%) compared with the controls (27%). Significantly higher spike and burst counts were also obtained using the tunnel devices. Neuronal networks inside the tunnels were amenable to pharmacological manipulation. The results suggest that tunnel devices encompassing the entire neuronal network can increase the measured spontaneous activity in hPSC-derived neuronal networks on MEAs. Therefore, they can increase the efficiency of functional studies of hPSC-derived networks on MEAs.
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Affiliation(s)
- Maria Toivanen
- NeuroGroup, BioMediTech Institute and Faculty of Medicine and Biosciences, University of Tampere, Tampere, Finland
| | - Anssi Pelkonen
- NeuroGroup, BioMediTech Institute and Faculty of Medicine and Biosciences, University of Tampere, Tampere, Finland
| | - Meeri Mäkinen
- NeuroGroup, BioMediTech Institute and Faculty of Medicine and Biosciences, University of Tampere, Tampere, Finland
| | - Laura Ylä-Outinen
- NeuroGroup, BioMediTech Institute and Faculty of Medicine and Biosciences, University of Tampere, Tampere, Finland
| | - Lassi Sukki
- Micro and Nanosystems Research Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - Pasi Kallio
- Micro and Nanosystems Research Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - Mervi Ristola
- NeuroGroup, BioMediTech Institute and Faculty of Medicine and Biosciences, University of Tampere, Tampere, Finland
| | - Susanna Narkilahti
- NeuroGroup, BioMediTech Institute and Faculty of Medicine and Biosciences, University of Tampere, Tampere, Finland
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Redfern WS, Tse K, Grant C, Keerie A, Simpson DJ, Pedersen JC, Rimmer V, Leslie L, Klein SK, Karp NA, Sillito R, Chartsias A, Lukins T, Heward J, Vickers C, Chapman K, Armstrong JD. Automated recording of home cage activity and temperature of individual rats housed in social groups: The Rodent Big Brother project. PLoS One 2017; 12:e0181068. [PMID: 28877172 PMCID: PMC5587114 DOI: 10.1371/journal.pone.0181068] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 06/26/2017] [Indexed: 12/04/2022] Open
Abstract
Measuring the activity and temperature of rats is commonly required in biomedical research. Conventional approaches necessitate single housing, which affects their behavior and wellbeing. We have used a subcutaneous radiofrequency identification (RFID) transponder to measure ambulatory activity and temperature of individual rats when group-housed in conventional, rack-mounted home cages. The transponder location and temperature is detected by a matrix of antennae in a baseplate under the cage. An infrared high-definition camera acquires side-view video of the cage and also enables automated detection of vertical activity. Validation studies showed that baseplate-derived ambulatory activity correlated well with manual tracking and with side-view whole-cage video pixel movement. This technology enables individual behavioral and temperature data to be acquired continuously from group-housed rats in their familiar, home cage environment. We demonstrate its ability to reliably detect naturally occurring behavioral effects, extending beyond the capabilities of routine observational tests and conventional monitoring equipment. It has numerous potential applications including safety pharmacology, toxicology, circadian biology, disease models and drug discovery.
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Affiliation(s)
- William S. Redfern
- Drug Safety and Metabolism, AstraZeneca R&D, Babraham Research Campus, Cambridge, United Kingdom
| | - Karen Tse
- Drug Safety and Metabolism, AstraZeneca R&D, Babraham Research Campus, Cambridge, United Kingdom
| | - Claire Grant
- Drug Safety and Metabolism, AstraZeneca R&D, Alderley Park, Cheshire, United Kingdom
| | - Amy Keerie
- Drug Safety and Metabolism, AstraZeneca R&D, Babraham Research Campus, Cambridge, United Kingdom
| | - David J. Simpson
- Drug Safety and Metabolism, AstraZeneca R&D, Alderley Park, Cheshire, United Kingdom
| | - John C. Pedersen
- Drug Safety and Metabolism, AstraZeneca R&D, Babraham Research Campus, Cambridge, United Kingdom
| | - Victoria Rimmer
- Drug Safety and Metabolism, AstraZeneca R&D, Alderley Park, Cheshire, United Kingdom
| | - Lauren Leslie
- Drug Safety and Metabolism, AstraZeneca R&D, Alderley Park, Cheshire, United Kingdom
| | - Stephanie K. Klein
- Drug Safety and Metabolism, AstraZeneca R&D, Babraham Research Campus, Cambridge, United Kingdom
| | - Natasha A. Karp
- Quantitative Biology, IMED, AstraZeneca, Darwin Building (Unit 310), Cambridge Science Park, Cambridge, United Kingdom
| | | | | | - Tim Lukins
- Actual Analytics Ltd, Edinburgh, United Kingdom
| | | | | | | | - J. Douglas Armstrong
- Actual Analytics Ltd, Edinburgh, United Kingdom
- School of Informatics, University of Edinburgh, Appleton Tower, Edinburgh, United Kingdom
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Montilla-García Á, Tejada MÁ, Perazzoli G, Entrena JM, Portillo-Salido E, Fernández-Segura E, Cañizares FJ, Cobos EJ. Grip strength in mice with joint inflammation: A rheumatology function test sensitive to pain and analgesia. Neuropharmacology 2017; 125:231-242. [PMID: 28760650 DOI: 10.1016/j.neuropharm.2017.07.029] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 07/11/2017] [Accepted: 07/26/2017] [Indexed: 01/15/2023]
Abstract
Grip strength deficit is a measure of pain-induced functional disability in rheumatic disease. We tested whether this parameter and tactile allodynia, the standard pain measure in preclinical studies, show parallels in their response to analgesics and basic mechanisms. Mice with periarticular injections of complete Freund's adjuvant (CFA) in the ankles showed periarticular immune infiltration and synovial membrane alterations, together with pronounced grip strength deficits and tactile allodynia measured with von Frey hairs. However, inflammation-induced tactile allodynia lasted longer than grip strength alterations, and therefore did not drive the functional deficits. Oral administration of the opioid drugs oxycodone (1-8 mg/kg) and tramadol (10-80 mg/kg) induced a better recovery of grip strength than acetaminophen (40-320 mg/kg) or the nonsteroidal antiinflammatory drugs ibuprofen (10-80 mg/kg) or celecoxib (40-160 mg/kg); these results are consistent with their analgesic efficacy in humans. Functional impairment was generally a more sensitive indicator of drug-induced analgesia than tactile allodynia, as drug doses that attenuated grip strength deficits showed little or no effect on von Frey thresholds. Finally, ruthenium red (a nonselective TRP antagonist) or the in vivo ablation of TRPV1-expressing neurons with resiniferatoxin abolished tactile allodynia without altering grip strength deficits, indicating that the neurobiology of tactile allodynia and grip strength deficits differ. In conclusion, grip strength deficits are due to a distinct type of pain that reflects an important aspect of the human pain experience, and therefore merits further exploration in preclinical studies to improve the translation of new analgesics from bench to bedside.
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Affiliation(s)
- Ángeles Montilla-García
- Department of Pharmacology, Faculty of Medicine, University of Granada, 18071 Granada, Spain; Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Miguel Á Tejada
- Department of Pharmacology, Faculty of Medicine, University of Granada, 18071 Granada, Spain; Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Gloria Perazzoli
- Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain; Department of Anatomy and Embryology, School of Medicine, University of Granada, 18071 Granada, Spain
| | - José M Entrena
- Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain; Animal Behavior Research Unit, Scientific Instrumentation Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Enrique Portillo-Salido
- Drug Discovery and Preclinical Development, ESTEVE, Parc Científic de Barcelona, Baldiri Reixac 4-8, Barcelona, Spain
| | - Eduardo Fernández-Segura
- Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain; Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain; Department of Histology, Faculty of Medicine, University of Granada, 18071 Granada, Spain
| | - Francisco J Cañizares
- Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain; Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain; Department of Histology, Faculty of Medicine, University of Granada, 18071 Granada, Spain
| | - Enrique J Cobos
- Department of Pharmacology, Faculty of Medicine, University of Granada, 18071 Granada, Spain; Institute of Neuroscience, Biomedical Research Center, University of Granada, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain; Biosanitary Research Institute, University Hospital Complex of Granada, 18012 Granada, Spain; Teófilo Hernando Institute for Drug Discovery, 28029 Madrid, Spain.
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Bitzer J, Henkel T, Nikiforov AI, Rihner MO, Henderson KA. A 90-day oral toxicity study of glycolipids from Dacryopinax spathularia in Beagle dogs. Food Chem Toxicol 2017; 109:544-551. [PMID: 28713046 DOI: 10.1016/j.fct.2017.07.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/16/2017] [Accepted: 07/12/2017] [Indexed: 11/29/2022]
Abstract
The subchronic toxicity of glycolipids from Dacryopinax spathularia (herein referred to as "AM-1") was studied in male and female Beagle dogs administered AM-1 by oral capsule at doses of 150, 500 or 1000 mg/kg/day for 90 days. AM-1 was well tolerated at all dosages and there were no test article-related effects on survival, clinical observations, neurological screening (functional observational battery) parameters, clinical pathology parameters, organ weights, macroscopic or microscopic evaluations. Test article-related changes were limited to minimal effects on food consumption and body weight changes in the 1000 mg/kg/day group females. Therefore, the no-observed-adverse-effect level (NOAEL) was considered to be 1000 mg/kg/day, the highest dosage level tested. These results add to the safety database for these naturally derived jelly mushroom glycolipids with potential for use as a food ingredient.
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Affiliation(s)
- Jens Bitzer
- IMD Natural Solutions GmbH, Dortmund, Germany
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Janecek E, Waindok P, Bankstahl M, Strube C. Abnormal neurobehaviour and impaired memory function as a consequence of Toxocara canis- as well as Toxocara cati-induced neurotoxocarosis. PLoS Negl Trop Dis 2017; 11:e0005594. [PMID: 28481889 PMCID: PMC5436879 DOI: 10.1371/journal.pntd.0005594] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 05/18/2017] [Accepted: 04/24/2017] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Neuroinvasive larvae of the worldwide occurring zoonotic roundworms Toxocara canis and T. cati may induce neurotoxocarosis (NT) in humans, provoking a variety of symptoms including cognitive deficits as well as neurological dysfunctions. An association with neuropsychological disorders has been discussed. Similar symptoms have been described in T. canis-infected mice, whereas data on T. cati-induced NT are rare. Therefore, it was aimed to obtain insights into the impact on neurobehaviour as well as progression of neurological symptoms and behavioural alterations during the course of NT directly comparing T. canis- and T. cati-infected mice as models for human NT. METHODOLOGY/PRINCIPAL FINDINGS C57BL/6 mice were orally infected with 2000 embryonated T. canis or T. cati eggs, respectively, the control group received tap water. Mice were screened weekly for neurobehavioural alterations and memory function starting one day prior infection until 97 days post infection (pi; T. canis-infection) and day 118 pi (T. cati-infection, uninfected control). Mostly motoric and neurological parameters were affected in T. canis-infected mice starting day 20 pi with severe progression accompanied by stereotypical circling. In contrast, T. cati-infected mice mostly showed reduced response to sudden sound stimulus (indicator for excitability) and flight behaviour starting day 6 pi. Interestingly, enhanced grooming behaviour was observed exclusively in T. cati-infected mice, indicating a possible role of neurotransmitter dysregulation. Reduced exploratory behaviour and memory impairment was observed in both infection groups with delayed onset and less severe progression in T. cati- compared to T. canis-infected mice. CONCLUSIONS/SIGNIFICANCE Results highlight the need to consider T. cati beside T. canis as causative agent of human NT. Findings provide valuable hints towards differences in key regulatory mechanisms during T. canis- and T. cati-induced NT, contributing to a comprehensive picture and consequently a broader understanding of NT, which will aid in developing strategies towards prevention in addition to novel diagnostic and therapeutic approaches.
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Affiliation(s)
- Elisabeth Janecek
- Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Hanover, Germany
| | - Patrick Waindok
- Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Hanover, Germany
| | - Marion Bankstahl
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, Hanover, Germany
- Center for Systems Neuroscience, Hanover, Germany
| | - Christina Strube
- Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Hanover, Germany
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Fajemiroye JO, Prabhakar PR, Cunha LCD, Costa EA, Zjawiony JK. 22-azidosalvinorin A exhibits antidepressant-like effect in mice. Eur J Pharmacol 2017; 800:96-106. [PMID: 28219707 DOI: 10.1016/j.ejphar.2017.02.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/16/2017] [Accepted: 02/16/2017] [Indexed: 10/20/2022]
Abstract
The increasing cases of depression has made the searches for new drugs and understanding of the underligning neurobiology of this psychiatric disorder a necessity. Here, we modified the structure of salvinorin A (a known halucinogen) and investigated antidepressant-like activity of its four derivatives; 22-methylsulfanylsalvinorin A(SA1), 2-O-cinnamoylsalvinorin B (CSB), 22-azidosalvinorin A (SA2), and 2-O-(4'-azidophenylsulfonyl)salvinorin B (SA3). Prior to behavioural tests (Irwin test, open field test - OFT, forced swimming test - FST and tail suspension test - TST), SA1 was prepared by reacting salvinorin B and methylthioacetic acid with 89% yield; CSB was obtained from the reaction of salvinorin B and cinnamic acid with 92% yield; SA2 was obtained from the reaction of salvinorin B and azidoacetic acid with 81% yield; and SA3 was prepared by reacting salvinorin B with 4-azidophenylsulfonyl chloride with 80% yield. Oral treatment of mice with these derivatives (1-1000mg/kg) did not elicit toxic sign or death. Unlike SA, SA1, CSB and SA3, treatment with SA2 (5, 10 and 20mg/kg) decreased the immobility (TST and FST) and swimming time (FST) without altering locomotor activity in OFT. A decrease in the immobility time in TST and FST confirmed antidepressant-like property of SA2. Although p-chlorophenylalanine (serotonin depletor) or WAY100635 (selective 5-HT1A receptor antagonist) did not attenuate effect of SA2, alpha-methyl-para-tyrosine (catecholamine depletor) and prazosin (selective α1-receptor antagonist) attenuated this effect. SA2 mildly inhibited monoamine oxidase and showed affinity for α1A, α1B, α1D and κ-opioid receptor subtypes. In summary, SA2 induced monoamine-mediated antidepressant-like effect.
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Affiliation(s)
- James Oluwagbamigbe Fajemiroye
- Department of Pharmacology, Federal University of Goias, Campus Samambaia, 74001-970 Goiania, GO, Brazil; Center for Studies and Toxicological-Pharmacological Research, Faculty of Pharmacy, Federal University of Goiás, PMB 131, CEP 74001-970, Goiânia, Brazil.
| | - Polepally Reddy Prabhakar
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, University of Mississippi, P.O. Box 1848, MS 38677, USA
| | - Luiz Carlos da Cunha
- Center for Studies and Toxicological-Pharmacological Research, Faculty of Pharmacy, Federal University of Goiás, PMB 131, CEP 74001-970, Goiânia, Brazil
| | - Elson Alves Costa
- Department of Pharmacology, Federal University of Goias, Campus Samambaia, 74001-970 Goiania, GO, Brazil
| | - Jordan K Zjawiony
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, University of Mississippi, P.O. Box 1848, MS 38677, USA
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Zhong M, Shoemake C, Fuller A, White D, Hanks C, Brocksmith D, Liu J, Gad S, Bouchard G, Stricker-Krongrad A. Development of a Functional Observational Battery in the Minipig for Regulatory Neurotoxicity Assessments. Int J Toxicol 2017; 36:113-123. [DOI: 10.1177/1091581816686049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A functional observational battery (FOB) is recommended as the first-tier neurotoxicity screening in the preclinical safety pharmacology testing guidelines. Minipigs have increasingly been used in regulatory toxicology studies; however, no current FOB protocol is available for neurotoxicity testing in these species. Hence, a minipig FOB instrument was developed. A complete crossover study with Sinclair minipigs was performed to evaluate physiologic, neurologic, and behavioral effects of amphetamine, ketamine, and diazepam. The treated minipigs were first observed in their home cage, were video-recorded for 10 minutes in an open field, and then went through a complete neurologic examination. Both ketamine and diazepam were shown to reduce the freezing and behavior shifts of treated minipigs, while increasing their exploratory behaviors. Both drugs also caused muscular and gait impairment. The effects of ketamine and diazepam were consistent with their roles as central nervous system (CNS) suppressants. Unique effects were also observed with ketamine and diazepam treatments, which may reflect their unique mechanisms of action. Consistent with its role as a CNS stimulant, amphetamine caused the treated minipigs to be hyperactive and to display increased freezing and behavior shifts and reduced exploring activities. These effects of amphetamine were opposite to those observed with ketamine and diazepam. Amphetamine also increased locomotion in the treated minipigs. The present effects of amphetamine, ketamine, and diazepam are in agreement with observations by others. In conclusion, the minipig is a suitable species for FOB evaluation of pharmaceuticals in preclinical safety pharmacology testing.
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Affiliation(s)
- Miao Zhong
- Sinclair Research Center, LLC, Auxvasse, MO, USA
| | | | - Amber Fuller
- Sinclair Research Center, LLC, Auxvasse, MO, USA
| | - David White
- Sinclair Research Center, LLC, Auxvasse, MO, USA
| | - Chris Hanks
- Sinclair Research Center, LLC, Auxvasse, MO, USA
| | | | - Jason Liu
- Sinclair Research Center, LLC, Auxvasse, MO, USA
| | - Shayne Gad
- Gad Consulting Services, Raleigh, NC, USA
| | - Guy Bouchard
- Sinclair Research Center, LLC, Auxvasse, MO, USA
- Sinclair BioResources, LLC, Auxvasse, MO, USA
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Tzima E, Serifi I, Tsikari I, Alzualde A, Leonardos I, Papamarcaki T. Transcriptional and Behavioral Responses of Zebrafish Larvae to Microcystin-LR Exposure. Int J Mol Sci 2017; 18:ijms18020365. [PMID: 28208772 PMCID: PMC5343900 DOI: 10.3390/ijms18020365] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 01/29/2017] [Accepted: 02/02/2017] [Indexed: 12/29/2022] Open
Abstract
Microcystins are cyclic heptapeptides that constitute a diverse group of toxins produced by cyanobacteria. One of the most toxic variants of this family is microcystin-LR (MCLR) which is a potent inhibitor of protein phosphatase 2A (PP2A) and induces cytoskeleton alterations. In this study, zebrafish larvae exposed to 500 μg/L of MCLR for four days exhibited a 40% reduction of PP2A activity compared to the controls, indicating early effects of the toxin. Gene expression profiling of the MCLR-exposed larvae using microarray analysis revealed that keratin 96 (krt96) was the most downregulated gene, consistent with the well-documented effects of MCLR on cytoskeleton structure. In addition, our analysis revealed upregulation in all genes encoding for the enzymes of the retinal visual cycle, including rpe65a (retinal pigment epithelium-specific protein 65a), which is critical for the larval vision. Quantitative real-time PCR (qPCR) analysis confirmed the microarray data, showing that rpe65a was significantly upregulated at 50 μg/L and 500 μg/L MCLR in a dose-dependent manner. Consistent with the microarray data, MCLR-treated larvae displayed behavioral alterations such as weakening response to the sudden darkness and hypoactivity in the dark. Our work reveals new molecular targets for MCLR and provides further insights into the molecular mechanisms of MCLR toxicity during early development.
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Affiliation(s)
- Eleni Tzima
- Laboratory of Biological Chemistry, Medical School, University of Ioannina, 45110 Ioannina, Greece.
- Division of Biomedical Research, Foundation for Research and Technology-Hellas, Institute of Molecular Biology and Biotechnology, 45110 Ιοannina, Greece.
| | - Iliana Serifi
- Laboratory of Biological Chemistry, Medical School, University of Ioannina, 45110 Ioannina, Greece.
- Division of Biomedical Research, Foundation for Research and Technology-Hellas, Institute of Molecular Biology and Biotechnology, 45110 Ιοannina, Greece.
| | - Ioanna Tsikari
- Laboratory of Biological Chemistry, Medical School, University of Ioannina, 45110 Ioannina, Greece.
| | | | - Ioannis Leonardos
- Laboratory of Zoology, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece.
| | - Thomais Papamarcaki
- Laboratory of Biological Chemistry, Medical School, University of Ioannina, 45110 Ioannina, Greece.
- Division of Biomedical Research, Foundation for Research and Technology-Hellas, Institute of Molecular Biology and Biotechnology, 45110 Ιοannina, Greece.
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Violle N, Rozan P, Demais H, Nyvall Collen P, Bisson JF. Evaluation of the antidepressant- and anxiolytic-like effects of a hydrophilic extract from the green seaweed Ulva sp. in rats. Nutr Neurosci 2017; 21:248-256. [PMID: 28102110 DOI: 10.1080/1028415x.2016.1276704] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVES The green seaweed Ulva sp. contains a large amount of ulvans, a family of sulphated polysaccharides. The present study was designed to investigate in rats the antidepressant- and anxiolytic-like effects of a hydrophilic extract of Ulva sp. (MSP) containing about 45% of ulvans. METHODS After a 14-day administration of MSP at doses of 10, 20 and 40 mg/kg/day, 48 and 60 male adult Wistar rats were respectively tested in the elevated plus-maze (EPM) and the forced swimming test (FST). In the FST, MSP effects were compared to the reference antidepressant drug imipramine (IMI) (10 mg/kg/day). Acute and sub-chronic toxicities of the extract were also assessed in male and female rats following OECD guidelines. RESULTS MSP treatment did not modify anxiety-related behaviour in the EPM. In contrast, MSP induced a dose-dependent reduction of immobility behaviour in the FST. At the highest tested dose of 40 mg/kg, MSP displayed a significant antidepressant-like effect similar to IMI. MSP did not modify the exploratory behaviour of rats in the open field test and did not produce any toxic effect. DISCUSSION MSP may potentially represent a good adjunct or alternative to existing antidepressant therapeutics. Further studies are necessary to confirm the mechanism of action of MSP and its modulation of brain functioning.
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Affiliation(s)
- Nicolas Violle
- a ETAP-Lab, 13 rue du Bois de la Champelle , Vandœuvre-lès-Nancy 54500, France
| | - Pascale Rozan
- a ETAP-Lab, 13 rue du Bois de la Champelle , Vandœuvre-lès-Nancy 54500, France
| | - Hervé Demais
- b BIOVET-CONSEIL , 1 rte du Linès, Merlevenez 56700, France
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