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Huang W, Yang S, Cheng YS, Sima N, Sun W, Shen M, Braisted JC, Lu W, Zheng W. Terfenadine resensitizes doxorubicin activity in drug-resistant ovarian cancer cells via an inhibition of CaMKII/CREB1 mediated ABCB1 expression. Front Oncol 2022; 12:1068443. [PMID: 36439493 PMCID: PMC9684669 DOI: 10.3389/fonc.2022.1068443] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 10/25/2022] [Indexed: 10/23/2023] Open
Abstract
Ovarian cancer is one of the most lethal gynecological malignancies. Recurrence or acquired chemoresistance is the leading cause of ovarian cancer therapy failure. Overexpression of ATP-binding cassette subfamily B member 1 (ABCB1), commonly known as P-glycoprotein, correlates closely with multidrug resistance (MDR). However, the mechanism underlying aberrant ABCB1 expression remains unknown. Using a quantitative high-throughput combinational screen, we identified that terfenadine restored doxorubicin sensitivity in an MDR ovarian cancer cell line. In addition, RNA-seq data revealed that the Ca2+-mediated signaling pathway in the MDR cells was abnormally regulated. Moreover, our research demonstrated that terfenadine directly bound to CAMKIID to prevent its autophosphorylation and inhibit the activation of the cAMP-responsive element-binding protein 1 (CREB1)-mediated pathway. Direct inhibition of CAMKII or CREB1 had the same phenotypic effects as terfenadine in the combined treatment, including lower expression of ABCB1 and baculoviral IAP repeat-containing 5 (BIRC5, also known as survivin) and increased doxorubicin-induced apoptosis. In this study, we demonstrate that aberrant regulation of the Ca2+-mediated CAMKIID/CREB1 pathway contributes to ABCB1 over-expression and MDR creation and that CAMKIID and CREB1 are attractive targets for restoring doxorubicin efficacy in ABCB1-mediated MDR ovarian cancer.
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Affiliation(s)
- Wei Huang
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Shu Yang
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Yu-Shan Cheng
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Ni Sima
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wei Sun
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Min Shen
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
| | - John C. Braisted
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Weiguo Lu
- Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Women’s Reproductive Health Research Laboratory of Zhejiang Province, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wei Zheng
- National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD, United States
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2
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Kidnapillai S, Bortolasci CC, Udawela M, Panizzutti B, Spolding B, Connor T, Sanigorski A, Dean OM, Crowley T, Jamain S, Gray L, Scarr E, Leboyer M, Dean B, Berk M, Walder K. The use of a gene expression signature and connectivity map to repurpose drugs for bipolar disorder. World J Biol Psychiatry 2020; 21:775-783. [PMID: 29956574 DOI: 10.1080/15622975.2018.1492734] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
To create a gene expression signature (GES) to represent the biological effects of a combination of known drugs for bipolar disorder (BD) on cultured human neuronal cells (NT2-N) and rat brains, which also has evidence of differential expression in individuals with BD. To use the GES to identify new drugs for BD using Connectivity Map (CMap).Methods: NT2-N (n = 20) cells and rats (n = 8) were treated with a BD drug combination (lithium, valproate, quetiapine and lamotrigine) or vehicle for 24 and 6 h, respectively. Following next-generation sequencing, the differential expression of genes was assessed using edgeR in R. The derived GES was compared to differentially expressed genes in post-mortem brains of individuals with BD. The GES was then used in CMap analysis to identify similarly acting drugs.Results: A total of 88 genes showed evidence of differential expression in response to the drug combination in both models, and therefore comprised the GES. Six of these genes showed evidence of differential expression in post-mortem brains of individuals with BD. CMap analysis identified 10 compounds (camptothecin, chlorambucil, flupenthixol, valdecoxib, rescinnamine, GW-8510, cinnarizine, lomustine, mifepristone and nimesulide) acting similarly to the BD drug combination.Conclusions: This study shows that GES and CMap can be used as tools to repurpose drugs for BD.
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Affiliation(s)
- Srisaiyini Kidnapillai
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia
| | - Chiara C Bortolasci
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia
| | - Madhara Udawela
- The Florey Institute of Neuroscience and Mental Health, Parkville, Australia
| | - Bruna Panizzutti
- Laboratory of Molecular Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) and Programa de Pós-graduação em Psiquiatria e Ciências do Comportamento, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Briana Spolding
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia
| | - Timothy Connor
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia
| | - Andrew Sanigorski
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia
| | - Olivia M Dean
- The Florey Institute of Neuroscience and Mental Health, Parkville, Australia.,IMPACT Strategic Research Centre, School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,Department of Psychiatry, the University of Melbourne, Parkville, Australia
| | - Tamsyn Crowley
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia.,Bioinformatics Core Research Facility (BCRF), Deakin University, Geelong, Australia
| | - Stéphane Jamain
- INSERM U955, Psychiatrie Translationnelle, Université Paris Est, Créteil, France
| | - Laura Gray
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia.,The Florey Institute of Neuroscience and Mental Health, Parkville, Australia
| | - Elizabeth Scarr
- The Florey Institute of Neuroscience and Mental Health, Parkville, Australia.,Faculty of Veterinary and Agricultural Sciences, Melbourne Veterinary School, The University of Melbourne, Victoria, Australia
| | - Marion Leboyer
- INSERM U955, Psychiatrie Translationnelle, Université Paris Est, Créteil, France
| | - Brian Dean
- The Florey Institute of Neuroscience and Mental Health, Parkville, Australia.,Faculty of Health Arts and Design, Centre for Mental Health, Swinburne University, Victoria, Australia
| | - Michael Berk
- The Florey Institute of Neuroscience and Mental Health, Parkville, Australia.,IMPACT Strategic Research Centre, School of Medicine, Barwon Health, Deakin University, Geelong, Australia.,Department of Psychiatry, the University of Melbourne, Parkville, Australia.,Orygen, the National, Centre of Excellence in Youth Mental Health, Parkville, Australia
| | - Ken Walder
- Centre for Molecular and Medical Research, School of Medicine, Deakin University, Geelong, Australia
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Berntsen HF, Moldes-Anaya A, Bjørklund CG, Ragazzi L, Haug TM, Strandabø RAU, Verhaegen S, Paulsen RE, Ropstad E, Tasker RA. Perfluoroalkyl acids potentiate glutamate excitotoxicity in rat cerebellar granule neurons. Toxicology 2020; 445:152610. [PMID: 33027616 DOI: 10.1016/j.tox.2020.152610] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/28/2020] [Accepted: 10/01/2020] [Indexed: 12/16/2022]
Abstract
Perfluoroalkyl acids (PFAAs) are persistent man-made chemicals, ubiquitous in nature and present in human samples. Although restrictions are being introduced, they are still used in industrial processes as well as in consumer products. PFAAs cross the blood-brain-barrier and have been observed to induce adverse neurobehavioural effects in humans and animals as well as adverse effects in neuronal in vitro studies. The sulfonated PFAA perfluorooctane sulfonic acid (PFOS), has been shown to induce excitotoxicity via the N-methyl-D-aspartate receptor (NMDA-R) in cultures of rat cerebellar granule neurons (CGNs). In the present study the aim was to further characterise PFOS-induced toxicity (1-60 μM) in rat CGNs, by examining interactions between PFOS and elements of glutamatergic signalling and excitotoxicity. Effects of the carboxylated PFAA, perfluorooctanoic acid (PFOA, 300-500 μM) on the same endpoints were also examined. During experiments in immature cultures at days in vitro (DIV) 8, PFOS increased both the potency and efficacy of glutamate, whereas in mature cultures at DIV 14 only increased potency was observed. PFOA also increased potency at DIV 14. PFOS-enhanced glutamate toxicity was further antagonised by the competitive NMDA-R antagonist 3-((R)-2-Carboxypiperazin-4-yl)-propyl-1-phosphonic acid (CPP) at DIV 8. At DIV 8, PFOS also induced glutamate release (9-13 fold increase vs DMSO control) after 1-3 and 24 h exposure, whereas for PFOA a large (80 fold) increase was observed, but only after 24 h. PFOS and PFOA both also increased alanine and decreased serine levels after 24 h exposure. In conclusion, our results indicate that PFOS at concentrations relevant in an occupational setting, may be inducing excitotoxicity, and potentiation of glutamate signalling, via an allosteric action on the NMDA-R or by actions on other elements regulating glutamate release or NMDA-R function. Our results further support our previous findings that PFOS and PFOA at equipotent concentrations induce toxicity via different mechanisms of action.
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Affiliation(s)
- Hanne Friis Berntsen
- Department of Production Animal Clinical Sciences NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102, Oslo, Norway; National Institute of Occupational Health, P.O. Box 8149 Dep N-0033, Oslo, Norway.
| | - Angel Moldes-Anaya
- Research and Development (R&D) Section, PET Imaging Center, University Hospital of North Norway (UNN), Tromsø, Norway; Nuclear Medicine and Radiation Biology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Cesilie Granum Bjørklund
- Department of Production Animal Clinical Sciences NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102, Oslo, Norway
| | - Lorenzo Ragazzi
- Neurobiology Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | | | | | - Steven Verhaegen
- Department of Production Animal Clinical Sciences NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102, Oslo, Norway
| | - Ragnhild Elisabeth Paulsen
- Department of Pharmacy, Section for Pharmacology and Pharmaceutical Biosciences, University of Oslo, Oslo, Norway
| | - Erik Ropstad
- Department of Production Animal Clinical Sciences NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102, Oslo, Norway
| | - R Andrew Tasker
- Department of Biomedical Sciences, University of Prince Edward Island, Charlottetown, PEI, Canada; Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
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4
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Qi F, Liu T, Zhang X, Gao X, Li Z, Chen L, Lin C, Wang L, Wang ZJ, Tang H, Chen Z. Ketamine reduces remifentanil-induced postoperative hyperalgesia mediated by CaMKII-NMDAR in the primary somatosensory cerebral cortex region in mice. Neuropharmacology 2020; 162:107783. [PMID: 31541650 DOI: 10.1016/j.neuropharm.2019.107783] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 09/09/2019] [Accepted: 09/16/2019] [Indexed: 12/29/2022]
Abstract
Remifentanil is commonly used clinically for perioperative pain relief, but it may induce postoperative hyperalgesia. Low doses of ketamine have remained a common choice in clinical practice, but the mechanisms of ketamine have not yet been fully elucidated. In this study, we examined the possible effects of ketamine on calcium/calmodulin-dependent protein kinase II α (CaMKIIα) and N-methyl-d-aspartate receptor (NMDAR) subunit NR2B in a mouse model of remifentanil-induced postoperative hyperalgesia (RIPH) in the primary somatosensory cerebral cortex (SI) region. The paw withdrawal mechanical threshold (PWMT) and paw withdrawal thermal latency (PWTL) were used to assess mechanical allodynia and thermal hyperalgesia, respectively, before and after intraoperative remifentanil administration. Before surgery, mice received intrathecal injections of the following drugs: ketamine, NMDA, BayK8644 (CaMKII activator), and KN93 (CaMKII inhibitor). Immunofluorescence was performed to determine the anatomical location and expression of activated CaMKIIα, phosphorylated CaMKIIα (p-CaMKIIα). Additionally, western blotting was performed to assess p-CaMKIIα and NMDAR expression levels in the SI region. Remifentanil decreased the PWMT and PWTL at 0.5 h, 2 h, and 5 h and increased p-CaMKIIα expression in the SI region. Ketamine increased the PWMT and PWTL and reversed the p-CaMKIIα upregulation. Both BayK8644 and NMDA reversed the effect of ketamine, decreased the PWMT and PWTL, and upregulated p-CaMKIIα expression. In contrast, KN93 enhanced the effect of ketamine by reducing hyperalgesia and downregulating p-CaMKIIα expression. These results suggested that ketamine reversed RIPH by inhibiting the phosphorylation of CaMKIIα and the NMDA receptor in the SI region in mice.
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Affiliation(s)
- Fang Qi
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China; Department of Anesthesiology, Jingzhou Central Hospital, The Second Clinical Medical College,Yangtze University, Jingzhou, Hubei, 434020, China
| | - Tianping Liu
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China; Department of Anesthesiology, The First College of Clinical Medical Science, China Three Gorges University,Yichang Central People's Hospital, Yichang, Hubei, 443003, China
| | - Xiaoyu Zhang
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China
| | - Xiaowei Gao
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China
| | - Zigang Li
- Department of Anesthesiology, Women's Hospital, Zhejiang University, School of Medicine, Hangzhou, Zhejiang, 310006, China
| | - Ling Chen
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China
| | - Chen Lin
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China
| | - Linlin Wang
- Department of physiology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Zaijie Jim Wang
- Department of Biopharmaceutical Sciences, University of Illinois, Chicago, IL, 60607, USA
| | - Huifang Tang
- Department of pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
| | - Zhijun Chen
- Department of Anesthesiology, Affiliated Hospital of Guilin Medical University, Gulin, Guangxi, 541004, China; Department of Anesthesiology, Wuhan NO. 1 Hospital, Wuhan, Hubei, 430022, China.
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5
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Cheng HH, Liang WZ, Kuo CC, Hao LJ, Chou CT, Jan CR. The exploration of effect of terfenadine on Ca 2+ signaling in renal tubular cells. J Recept Signal Transduct Res 2019; 39:73-79. [PMID: 31184240 DOI: 10.1080/10799893.2019.1620777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Terfenadine, an antihistamine used for the treatment of allergic conditions, affected Ca2+-related physiological responses in various models. However, the effect of terfenadine on cytosolic free Ca2+ levels ([Ca2+]i) and its related physiology in renal tubular cells is unknown. This study examined whether terfenadine altered Ca2+ signaling and caused cytotoxicity in Madin-Darby canine kidney (MDCK) renal tubular cells. The Ca2+-sensitive fluorescent dye fura-2 was used to measure [Ca2+]i. Cell viability was measured by the fluorescent reagent 4-[3-[4-lodophenyl]-2-4(4-nitrophenyl)-2H-5-tetrazolio-1,3-benzene disulfonate] water soluble tetrazolium-1 (WST-1) assay. Terfenadine at concentrations of 100-1000 μM induced [Ca2+]i rises concentration dependently. The response was reduced by approximately 35% by removing extracellular Ca2+. In Ca2+-free medium, treatment with the endoplasmic reticulum Ca2+ pump inhibitor 2,5-di-tert-butylhydroquinone (BHQ) partly inhibited terfenadine-evoked [Ca2+]i rises. Conversely, treatment with terfenadine abolished BHQ-evoked [Ca2+]i rises. Inhibition of phospholipase C (PLC) with U73122 inhibited 95% of terfenadine-induced Ca2+ release. Terfenadine-induced Ca2+ entry was supported by Mn2+-caused quenching of fura-2 fluorescence. Terfenadine-induced Ca2+ entry was partly inhibited by an activator of protein kinase C (PKC), phorbol 12-myristate 13 acetate (PMA) and by three modulators of store-operated Ca2+ channels (nifedipine, econazole, and SKF96365). Terfenadine at 200-300 μM decreased cell viability, which was not reversed by pretreatment with the Ca2+ chelator 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid-acetoxymethyl ester (BAPTA/AM). Together, in MDCK cells, terfenadine induced [Ca2+]i rises by evoking PLC-dependent Ca2+ release from the endoplasmic reticulum and Ca2+ entry via PKC-sensitive store-operated Ca2+ entry. Furthermore, terfenadine caused cell death that was not triggered by preceding [Ca2+]i rises.
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Affiliation(s)
- He-Hsiung Cheng
- a Department of Medicine , Chang Bing Show Chwan Memorial Hospital , Changhua , Taiwan
| | - Wei-Zhe Liang
- b Department of Medical Education and Research , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan.,c Department of Pharmacy , Tajen University , Pingtung , Taiwan
| | - Chun-Chi Kuo
- d Department of Nursing , Tzu Hui Institute of Technology , Pingtung , Taiwan
| | - Lyh-Jyh Hao
- e Department of Metabolism , Kaohsiung Veterans General Hospital Tainan Branch , Tainan , Taiwan
| | - Chiang-Ting Chou
- f Department of Nursing, Division of Basic Medical Sciences , Chang Gung University of Science and Technology , Chia-Yi , Taiwan
| | - Chung-Ren Jan
- b Department of Medical Education and Research , Kaohsiung Veterans General Hospital , Kaohsiung , Taiwan
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6
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Pérez-Gómez A, Cabrera-García D, Warm D, Marini AM, Salas Puig J, Fernández-Sánchez MT, Novelli A. From the Cover: Selective Enhancement of Domoic Acid Toxicity in Primary Cultures of Cerebellar Granule Cells by Lowering Extracellular Na+ Concentration. Toxicol Sci 2019; 161:103-114. [PMID: 29029261 DOI: 10.1093/toxsci/kfx201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Domoic acid (DOM) is an excitatory amino acid analog of kainic acid (KA) that acts through glutamic acid (GLU) receptors, inducing a fast and potent neurotoxic response. Here, we present evidence for an enhancement of excitotoxicity following exposure of cultured cerebellar granule cells to DOM in the presence of lower than physiological Na+ concentrations. The concentration of DOM that reduced by 50% neuronal survival was approximately 3 µM in Na+-free conditions and 16 µM in presence of a physiological concentration of extracellular Na+. The enhanced neurotoxic effect of DOM was fully prevented by AMPA/KA receptor antagonist, while N-methyl-D-aspartate-receptor-mediated neurotoxicity did not seem to be involved, as the absence of extracellular Na+ failed to potentiate GLU excitotoxicity under the same experimental conditions. Lowering of extracellular Na+ concentration to 60 mM eliminated extracellular recording of spontaneous electrophysiological activity from cultured neurons grown on a multi electrode array and prevented DOM stimulation of the electrical activity. Although changes in the extracellular Na+ concentration did not alter the magnitude of the rapid increase in intracellular Ca2+ levels associated to DOM exposure, they did change significantly the contribution of voltage-sensitive calcium channels (VScaCs) and the recovery time to baseline. The prevention of Ca2+ influx via VSCaCs by nifedipine failed to prevent DOM toxicity at any extracellular Na+ concentration, while the reduction of extracellular Ca2+ concentration ameliorated DOM toxicity only in the absence of extracellular Na+, enhancing it in physiological conditions. Our data suggest a crucial role for extracellular Na+ concentration in determining excitotoxicity by DOM.
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Affiliation(s)
- Anabel Pérez-Gómez
- Department of Biochemistry and Molecular Biology, University of Oviedo, Oviedo, Spain
| | - David Cabrera-García
- Department of Biochemistry and Molecular Biology, University of Oviedo, Oviedo, Spain
| | - Davide Warm
- Department of Biochemistry and Molecular Biology, University of Oviedo, Oviedo, Spain
| | - Ann M Marini
- Department of Neurology and Program in Neuroscience, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Javier Salas Puig
- Unit of Epilepsy, Vall d'Hebrón Hospital, Barcelona, Spain.,Department of Medicine, University Autonoma of Barcelona, Barcelona, Spain
| | - Maria Teresa Fernández-Sánchez
- Department of Biochemistry and Molecular Biology, University of Oviedo, Oviedo, Spain.,University Institute of Biotechnology
| | - Antonello Novelli
- University Institute of Biotechnology.,Department of Psychology, University of Oviedo, Oviedo, Spain
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Epi/perineural and Schwann Cells as Well as Perineural Sheath Integrity are Affected Following 2,4-D Exposure. Neurotox Res 2017; 32:624-638. [PMID: 28699141 DOI: 10.1007/s12640-017-9777-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 06/24/2017] [Accepted: 06/28/2017] [Indexed: 01/18/2023]
Abstract
2,4-dicholorophenoxy acetic acid (2,4-D) is a worldwide-known hormone herbicide. However, there are increasing concerns about its exposure and risks of developing pathological conditions for the peripheral nervous system. The aim of this study was to investigate the mechanism(s) involved in the toxicity of 2,4-D on peripheral nerve's cellular components. The epi/perineural and Schwann cells and a total of three cell lines were treated with 2,4-D. The viability of cells at different doses of 2,4-D was measured by MTT assay. The cell cycle analyses, cumulative cell counting, fluorescent staining, antioxidant and caspase enzymes activity were examined on epi/perineural and Schwann cells. The epi/perineural cells were assessed as having biological macromolecular changes. Some tight junction-related genes and proteins were also tested on explants of 2,4-D treated epi/perineural tissue. The viability of 2,4-D treated cells was reduced in a dose-dependent manner. Reduced growth rate and G1 cell cycle arrest were verified in 2,4-D treated epi/perineural and Schwann cells. The use of staining methods (acridine orange/ethidium bromide and DAPI) and caspase 3/7 activity assay along with malondialdehyde, glutathione peroxidase, and superoxide dismutase activity assays indicated the apoptotic and oxidant effects of 2,4-D on epi/perineural and Schwann cells. Data obtained from FTIR revealed changes in epi/perineural proteins and cell membrane lipids. Additionally, claudin-1, occludin, and ZO-1 gene/protein expression profiles were significantly reduced in 2,4-D-treated epi/perineural pieces. Our data indicated that oxidative stress, apoptosis of epi/perineural and Schwann cell and impaired blood-nerve barrier may have contributed to nerve damage following 2,4-D exposure.
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Abstract
Histamine is a transmitter in the nervous system and a signaling molecule in the gut, the skin, and the immune system. Histaminergic neurons in mammalian brain are located exclusively in the tuberomamillary nucleus of the posterior hypothalamus and send their axons all over the central nervous system. Active solely during waking, they maintain wakefulness and attention. Three of the four known histamine receptors and binding to glutamate NMDA receptors serve multiple functions in the brain, particularly control of excitability and plasticity. H1 and H2 receptor-mediated actions are mostly excitatory; H3 receptors act as inhibitory auto- and heteroreceptors. Mutual interactions with other transmitter systems form a network that links basic homeostatic and higher brain functions, including sleep-wake regulation, circadian and feeding rhythms, immunity, learning, and memory in health and disease.
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Affiliation(s)
- Helmut L Haas
- Institute of Neurophysiology, Heinrich-Heine-University, Duesseldorf, Germany.
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10
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Domoic acid toxicologic pathology: a review. Mar Drugs 2008; 6:180-219. [PMID: 18728725 PMCID: PMC2525487 DOI: 10.3390/md20080010] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Revised: 05/16/2008] [Accepted: 05/16/2008] [Indexed: 12/29/2022] Open
Abstract
Domoic acid was identified as the toxin responsible for an outbreak of human poisoning that occurred in Canada in 1987 following consumption of contaminated blue mussels [Mytilus edulis]. The poisoning was characterized by a constellation of clinical symptoms and signs. Among the most prominent features described was memory impairment which led to the name Amnesic Shellfish Poisoning [ASP]. Domoic acid is produced by certain marine organisms, such as the red alga Chondria armata and planktonic diatom of the genus Pseudo-nitzschia. Since 1987, monitoring programs have been successful in preventing other human incidents of ASP. However, there are documented cases of domoic acid intoxication in wild animals and outbreaks of coastal water contamination in many regions world-wide. Hence domoic acid continues to pose a global risk to the health and safety of humans and wildlife. Several mechanisms have been implicated as mediators for the effects of domoic acid. Of particular importance is the role played by glutamate receptors as mediators of excitatory neurotransmission and the demonstration of a wide distribution of these receptors outside the central nervous system, prompting the attention to other tissues as potential target sites. The aim of this document is to provide a comprehensive review of ASP, DOM induced pathology including ultrastructural changes associated to subchronic oral exposure, and discussion of key proposed mechanisms of cell/tissue injury involved in DOM induced brain pathology and considerations relevant to food safety and human health.
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11
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Pérez-Gómez A, Ferrero-Gutierrez A, Novelli A, Franco JM, Paz B, Fernández-Sánchez MT. Potent Neurotoxic Action of the Shellfish Biotoxin Yessotoxin on Cultured Cerebellar Neurons. Toxicol Sci 2005; 90:168-77. [PMID: 16322070 DOI: 10.1093/toxsci/kfj064] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Yessotoxin (YTX) and its analogues are disulphated polyether compounds of increasing occurrence in seafood. The biological effects of these algal toxins on mammals and the risk associated to their ingestion have not been clearly established. We have used primary cultures of rat cerebellar neurons to investigate whether YTX affected survival and functioning of central nervous system neurons. Exposure to YTX (> or =25 nM) caused first (approximately 8 h) weakening, granulation, and fragmentation of neuronal network, and later (approximately 48 h) complete disintegration of neurites and extensive neuronal death, with a significant decrease in the amount of filamentous actin. The concentration of YTX that reduced by 50% the maximum neuronal survival (EC50(48)) was approximately 20 nM. Lower toxin concentrations (approximately 15 nM) also caused visible signs of toxicity affecting neuronal network primarily. Removal of YTX after 5 h exposure delayed the onset of neurotoxicity but did not prevent neuronal degeneration and death. YTX induced a two-fold increase in cytosolic calcium that was prevented by the voltage-sensitive calcium channel antagonists nifedipine and verapamil. These antagonists were, however, completely ineffective in reducing neurotoxicity. Voltage-sensitive sodium channel antagonists saxitoxin and nefopam, and the NMDA receptor antagonist MK-801 also failed to prevent YTX neurotoxicity. Neuronal death by YTX involved typical hallmarks of apoptosis and required the synthesis of new proteins. Our data suggest neuronal tissue to be a vulnerable biological target for YTX. The potent neurotoxicity of YTX we report raises reasonable concern about the potential risk that exposure to YTX may represent for neuronal survival in vivo.
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Affiliation(s)
- Anabel Pérez-Gómez
- Biochemistry and Molecular Biology Department, Institute of Biotechnology, University of Oviedo, Oviedo, Spain
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Díaz-Trelles R, Novelli A, Fernández-Sánchez MT. RNA synthesis-dependent potentiation of alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate receptor-mediated toxicity by antihistamine terfenadine in cultured rat cerebellar neurons. Neurosci Lett 2003; 345:136-40. [PMID: 12821189 DOI: 10.1016/s0304-3940(03)00467-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We have studied the effects of terfenadine on neurotoxicity and elevation of free cytoplasmic Ca2+ levels upon stimulation of alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) receptors in cultured cerebellar neurons. Pre-exposure to terfenadine (5 microM, 5 h) significantly increased neuronal death following specific stimulation of receptors by 100 microM AMPA or by subtoxic concentrations of domoate (8 microM), stimuli that are non-toxic when applied to terfenadine-untreated sister cultures. Terfenadine potentiation was prevented by the transcription inhibitor actinomycin D and was significantly ameliorated by histamine (1 mM). In terfenadine-treated neurons, AMPA increased [Ca2+](i) by approximately five fold, while AMPA induced no significant increase in [Ca2+](i) in the absence of terfenadine. Terfenadine reduced neuronal steady-state concentrations of [Ca2+](i) by approximately 75%. Our results suggest a role for histamine H1 receptors and intracellular calcium in the modulation of the excitotoxic response via AMPA receptors.
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Affiliation(s)
- Ramón Díaz-Trelles
- Department of Biochemistry and Molecular Biology, University of Oviedo, Campus el Cristo, 33071 Oviedo, Spain
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