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Hassan M, Yasir M, Shahzadi S, Chun W, Kloczkowski A. Molecular Role of Protein Phosphatases in Alzheimer's and Other Neurodegenerative Diseases. Biomedicines 2024; 12:1097. [PMID: 38791058 PMCID: PMC11117500 DOI: 10.3390/biomedicines12051097] [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: 03/22/2024] [Revised: 05/02/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024] Open
Abstract
Alzheimer's disease (AD) is distinguished by the gradual loss of cognitive function, which is associated with neuronal loss and death. Accumulating evidence supports that protein phosphatases (PPs; PP1, PP2A, PP2B, PP4, PP5, PP6, and PP7) are directly linked with amyloid beta (Aβ) as well as the formation of the neurofibrillary tangles (NFTs) causing AD. Published data reported lower PP1 and PP2A activity in both gray and white matters in AD brains than in the controls, which clearly shows that dysfunctional phosphatases play a significant role in AD. Moreover, PP2A is also a major causing factor of AD through the deregulation of the tau protein. Here, we review recent advances on the role of protein phosphatases in the pathology of AD and other neurodegenerative diseases. A better understanding of this problem may lead to the development of phosphatase-targeted therapies for neurodegenerative disorders in the near future.
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Affiliation(s)
- Mubashir Hassan
- The Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children’s Hospital, Columbus, OH 43205, USA;
| | - Muhammad Yasir
- Department of Pharmacology, Kangwon National University School of Medicine, Chuncheon 24341, Republic of Korea; (M.Y.); (W.C.)
| | - Saba Shahzadi
- The Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children’s Hospital, Columbus, OH 43205, USA;
| | - Wanjoo Chun
- Department of Pharmacology, Kangwon National University School of Medicine, Chuncheon 24341, Republic of Korea; (M.Y.); (W.C.)
| | - Andrzej Kloczkowski
- The Steve and Cindy Rasmussen Institute for Genomic Medicine, Nationwide Children’s Hospital, Columbus, OH 43205, USA;
- Department of Pediatrics, The Ohio State University, Columbus, OH 43205, USA
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH 43210, USA
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Amonruttanapun P, Chongthammakun S, Chamniansawat S. The effects of okadaic acid-treated SH-SY5Y cells on microglia activation and phagocytosis. Cell Biol Int 2021; 46:234-242. [PMID: 34748253 DOI: 10.1002/cbin.11722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 11/06/2021] [Accepted: 11/06/2021] [Indexed: 11/09/2022]
Abstract
The activation of microglia is found to be associated with neurodegenerative disorders including Alzheimer's disease (AD). Several studies have shown that okadaic acid (OA) induced deposition of tau hyperphosphorylation, and subsequent neuronal degeneration, loss of synapses, and memory impairment, all of which resemble the pathology of AD. Although OA is a powerful tool available for mechanisms of the neurotoxicity associated with AD, the exact mechanism underlying the activation of microglial cells remains unrevealed. The aim of this study was to determine the effect of both OA and OA-treated neuroblastoma SH-SY5Y cells on microglial HAPI cell viability, activation, and phagocytosis. The results showed that both OA and OA-treated neurons did not induce any detectable cytotoxicity of microglial cells. Furthermore, incubation with OA-treated SH-SY5Y cells could increase the expression of ionized calcium-binding adapter molecule 1 (Iba1) on microglial HAPI cells. This result indicated that OA may induce microglial activation through the toxicity of neurons. Moreover, we also demonstrated that OA-treated SH-SY5Y cells were engulfed by CD11b/c-labeled microglial HAPI cells, which were abolished after treatment with 10 mM O-phospho- l-serine ( L-SOP) for 30 min before co-culture with OA-treated SH-SY5Y cells, indicating cells experiencing phagocytic activity. We also confirmed that OA treatment for 24 h significantly increased tau hyperphosphorylation at S396 in SH-SY5Y cells. In conclusion, our findings indicate that OA is a potential toxic inducer underlying the role of microglia in AD pathogenesis.
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Affiliation(s)
- Prateep Amonruttanapun
- Department of Anatomy and Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Sukumal Chongthammakun
- Department of Anatomy and Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Siriporn Chamniansawat
- Division of Biomedical Sciences, Faculty of Allied Health Sciences, Burapha University, Chonburi, Thailand
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Solís-Chagoyán H, Domínguez-Alonso A, Valdés-Tovar M, Argueta J, Sánchez-Florentino ZA, Calixto E, Benítez-King G. Melatonin Rescues the Dendrite Collapse Induced by the Pro-Oxidant Toxin Okadaic Acid in Organotypic Cultures of Rat Hilar Hippocampus. Molecules 2020; 25:molecules25235508. [PMID: 33255515 PMCID: PMC7727803 DOI: 10.3390/molecules25235508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023] Open
Abstract
The pro-oxidant compound okadaic acid (OKA) mimics alterations found in Alzheimer's disease (AD) as oxidative stress and tau hyperphosphorylation, leading to neurodegeneration and cognitive decline. Although loss of dendrite complexity occurs in AD, the study of this post-synaptic domain in chemical-induced models remains unexplored. Moreover, there is a growing expectation for therapeutic adjuvants to counteract these brain dysfunctions. Melatonin, a free-radical scavenger, inhibits tau hyperphosphorylation, modulates phosphatases, and strengthens dendritic arbors. Thus, we determined if OKA alters the dendritic arbors of hilar hippocampal neurons and whether melatonin prevents, counteracts, or reverses these damages. Rat organotypic cultures were incubated with vehicle, OKA, melatonin, and combined treatments with melatonin either before, simultaneously, or after OKA. DNA breaks were assessed by TUNEL assay and nuclei were counterstained with DAPI. Additionally, MAP2 was immunostained to assess the dendritic arbor properties by the Sholl method. In hippocampal hilus, OKA increased DNA fragmentation and reduced the number of MAP2(+) cells, whereas melatonin protected against oxidation and apoptosis. Additionally, OKA decreased the dendritic arbor complexity and melatonin not only counteracted, but also prevented and reversed the dendritic arbor retraction, highlighting its role in post-synaptic domain integrity preservation against neurodegenerative events in hippocampal neurons.
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Affiliation(s)
- Héctor Solís-Chagoyán
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico; (H.S.-C.); (A.D.-A.); (M.V.-T.); (J.A.); (Z.A.S.-F.)
| | - Aline Domínguez-Alonso
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico; (H.S.-C.); (A.D.-A.); (M.V.-T.); (J.A.); (Z.A.S.-F.)
| | - Marcela Valdés-Tovar
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico; (H.S.-C.); (A.D.-A.); (M.V.-T.); (J.A.); (Z.A.S.-F.)
- Departamento de Farmacogenética (current affiliation), Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico
| | - Jesús Argueta
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico; (H.S.-C.); (A.D.-A.); (M.V.-T.); (J.A.); (Z.A.S.-F.)
| | - Zuly A. Sánchez-Florentino
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico; (H.S.-C.); (A.D.-A.); (M.V.-T.); (J.A.); (Z.A.S.-F.)
| | - Eduardo Calixto
- Departamento de Neurobiología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico;
| | - Gloria Benítez-King
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico; (H.S.-C.); (A.D.-A.); (M.V.-T.); (J.A.); (Z.A.S.-F.)
- Correspondence: ; Tel.: +52-55-4160-5097
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Elgenaidi IS, Spiers JP. Regulation of the phosphoprotein phosphatase 2A system and its modulation during oxidative stress: A potential therapeutic target? Pharmacol Ther 2019; 198:68-89. [PMID: 30797822 DOI: 10.1016/j.pharmthera.2019.02.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 02/15/2019] [Indexed: 02/06/2023]
Abstract
Phosphoprotein phosphatases are of growing interest in the pathophysiology of many diseases and are often the neglected partner of protein kinases. One family member, PP2A, accounts for dephosphorylation of ~55-70% of all serine/threonine phosphosites. Interestingly, dysregulation of kinase signalling is a hallmark of many diseases in which an increase in oxidative stress is also noted. With this in mind, we assess the evidence to support oxidative stress-mediated regulation of the PP2A system In this article, we first present an overview of the PP2A system before providing an analysis of the regulation of PP2A by endogenous inhibitors, post translational modification, and miRNA. Next, a detailed critique of data implicating reactive oxygen species, ischaemia, ischaemia-reperfusion, and hypoxia in regulating the PP2A holoenzyme and associated regulators is presented. Finally, the pharmacological targeting of PP2A, its endogenous inhibitors, and enzymes responsible for its post-translational modification are covered. There is extensive evidence that oxidative stress modulates multiple components of the PP2A system, however, most of the data pertains to the catalytic subunit of PP2A. Irrespective of the underlying aetiology, free radical-mediated attenuation of PP2A activity is an emerging theme. However, in many instances, a dichotomy exists, which requires clarification and mechanistic insight. Nevertheless, this raises the possibility that pharmacological activation of PP2A, either through small molecule activators of PP2A or CIP2A/SET antagonists may be beneficial in modulating the cellular response to oxidative stress. A better understanding of which, will have wide ranging implications for cancer, heart disease and inflammatory conditions.
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Affiliation(s)
- I S Elgenaidi
- Department of Pharmacology and Therapeutics, Trinity College Dublin, Ireland
| | - J P Spiers
- Department of Pharmacology and Therapeutics, Trinity College Dublin, Ireland.
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Tsai SYA, Bendriem RM, Lee CTD. The cellular basis of fetal endoplasmic reticulum stress and oxidative stress in drug-induced neurodevelopmental deficits. Neurobiol Stress 2018; 10:100145. [PMID: 30937351 PMCID: PMC6430408 DOI: 10.1016/j.ynstr.2018.100145] [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: 02/28/2018] [Revised: 12/02/2018] [Accepted: 12/26/2018] [Indexed: 11/30/2022] Open
Abstract
Prenatal substance exposure is a growing public health concern worldwide. Although the opioid crisis remains one of the most prevalent addiction problems in our society, abuse of cocaine, methamphetamines, and other illicit drugs, particularly amongst pregnant women, are nonetheless significant and widespread. Evidence demonstrates prenatal drug exposure can affect fetal brain development and thus can have long-lasting impact on neurobehavioral and cognitive performance later in life. In this review, we highlight research examining the most prevalent drugs of abuse and their effects on brain development with a focus on endoplasmic reticulum stress and oxidative stress signaling pathways. A thorough exploration of drug-induced cellular stress mechanisms during prenatal brain development may provide insight into therapeutic interventions to combat effects of prenatal drug exposure.
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Affiliation(s)
- S-Y A Tsai
- Integrative Neuroscience Branch, Division of Neuroscience and Behavior, National Institute on Drug Abuse, The National Institute of Health, Department of Health and Human Services, Bethesda, MD, 20892, USA
| | - Raphael M Bendriem
- Center for Neurogenetics, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Chun-Ting D Lee
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, USA
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Kaddour H, Hamdi Y, Amri F, Bahdoudi S, Bouannee I, Leprince J, Zekri S, Vaudry H, Tonon MC, Vaudry D, Amri M, Mezghani S, Masmoudi-Kouki O. Antioxidant and Anti-Apoptotic Activity of Octadecaneuropeptide Against 6-OHDA Toxicity in Cultured Rat Astrocytes. J Mol Neurosci 2018; 69:1-16. [PMID: 30343367 DOI: 10.1007/s12031-018-1181-4] [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] [Received: 07/25/2018] [Accepted: 09/21/2018] [Indexed: 12/12/2022]
Abstract
Oxidative stress, associated with various neurodegenerative diseases, promotes ROS generation, impairs cellular antioxidant defenses, and finally, triggers both neurons and astroglial cell death by apoptosis. Astrocytes specifically synthesize and release endozepines, a family of regulatory peptides, including the octadecaneuropeptide (ODN). We have previously reported that ODN acts as a potent neuroprotective agent that prevents 6-OHDA-induced apoptotic neuronal death. The purpose of the present study was to investigate the potential glioprotective effect of ODN on 6-OHDA-induced oxidative stress and cell death in cultured rat astrocytes. Incubation of astrocytes with graded concentrations of ODN (10-14 to 10-8 M) inhibited 6-OHDA-evoked cell death in a concentration- and time-dependent manner. In addition, ODN prevented the decrease of mitochondrial activity and caspase-3 activation induced by 6-OHDA. 6-OHDA-treated cells also exhibited enhanced levels of ROS associated with a generation of H2O2 and O2°-, and a reduction of both superoxide dismutase (SOD) and catalase (CAT) activities. Co-treatment of astrocytes with low concentrations of ODN dose-dependently blocked 6-OHDA-evoked production of ROS and inhibition of antioxidant enzyme activities. Concomitantly, ODN stimulated Mn-SOD, CAT, glutathione peroxidase-1, and sulfiredoxin-1 gene transcription and rescued 6-OHDA-associated reduced expression of endogenous antioxidant enzymes. Taken together, these data indicate that, in rat astrocytes, ODN exerts anti-apoptotic and anti-oxidative activities, and hence prevents 6-OHDA-induced oxidative assault and cell death. ODN is thus a potential candidate to delay neuronal damages in various pathological conditions involving oxidative neurodegeneration.
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Affiliation(s)
- Hadhemi Kaddour
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia.,CIRB, CNRS UMR 7241/INSERM U1050, PSL University, Labex MemoLife, Collège de France, 11 place Marcelin Berthelot, 75231, Paris, France.,Imagine Institute and Center of Psychiatry and Neuroscience, Université Paris Descartes, 102-108 rue de la Santé, 75014, Paris, France
| | - Yosra Hamdi
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia
| | - Fatma Amri
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia
| | - Seyma Bahdoudi
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia.,UNIROUEN, Inserm U1239, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, Normandie Univ, 76000, Rouen, France
| | - Ibtissem Bouannee
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia
| | - Jérôme Leprince
- UNIROUEN, Inserm U1239, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, Normandie Univ, 76000, Rouen, France.,UNIROUEN, Regional Cell Imaging Platform of Normandy (PRIMACEN), Normandie Univ, 76000, Rouen, France
| | - Sami Zekri
- USCR Transmission Electron Microscopy, Faculty of Medicine, University Tunis El Manar, Tunis, Tunisia
| | - Hubert Vaudry
- UNIROUEN, Inserm U1239, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, Normandie Univ, 76000, Rouen, France.,UNIROUEN, Regional Cell Imaging Platform of Normandy (PRIMACEN), Normandie Univ, 76000, Rouen, France
| | - Marie-Christine Tonon
- UNIROUEN, Inserm U1239, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, Normandie Univ, 76000, Rouen, France
| | - David Vaudry
- UNIROUEN, Inserm U1239, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, Normandie Univ, 76000, Rouen, France.,UNIROUEN, Regional Cell Imaging Platform of Normandy (PRIMACEN), Normandie Univ, 76000, Rouen, France
| | - Mohamed Amri
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia
| | - Sana Mezghani
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia
| | - Olfa Masmoudi-Kouki
- University Tunis El Manar, Faculty of Sciences of Tunis, LR18ES03, Laboratory of Neurophysiology, Cellular Physiopathology and Biomelcules Valorisation, 2092, Tunis, Tunisia.
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O'Sullivan SA, Dev KK. The chemokine fractalkine (CX3CL1) attenuates H 2O 2-induced demyelination in cerebellar slices. J Neuroinflammation 2017; 14:159. [PMID: 28810923 PMCID: PMC5558650 DOI: 10.1186/s12974-017-0932-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/03/2017] [Indexed: 01/09/2023] Open
Abstract
Background Fractalkine/CX3CR1 signalling has been implicated in many neurodegenerative and neurological diseases of the central nervous system (CNS). This signalling pathway plays an important role in regulating reactive oxygen species (ROS), as well as itself being altered in conditions of oxidative stress. Here, we investigated the effects of recombinant fractalkine (rCX3CL1) in models of hydrogen peroxide (H2O2)-induced demyelination and astrocyte toxicity, within organotypic cerebellar slice cultures. Methods Organotypic cerebellar slice cultures were generated from postnatal day 10 C57BL/6J mice to assess myelination. Immunohistochemistry was used to measure the degree of myelination. Fluorescent images were obtained using a leica SP8 confocal microscope and data analysed using ImageJ software. Results We show here, for the first time, that rCX3CL1 significantly attenuated bolus H2O2-induced demyelination as measured by expression of myelin basic protein (MBP) and attenuated reduced vimentin expression. Using the GOX-CAT system to continuously generate low levels of H2O2 and induce demyelination, we observed similar protective effects of rCX3CL1 on MBP and MOG fluorescence, although in this model, the decrease in vimentin expression was not altered. Conclusions This data indicates possible protective effects of fractalkine signalling in oxidative stress-induced demyelination in the central nervous system. This opens up the possibility of fractalkine receptor (CX3CR1) modulation as a potential new target for protecting against oxidative stress-induced demyelination in both inflammatory and non-inflammatory nervous system disorders.
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Affiliation(s)
- Sinead A O'Sullivan
- Drug Development, School of Medicine, Trinity College Dublin, Dublin, Ireland
| | - Kumlesh K Dev
- Drug Development, School of Medicine, Trinity College Dublin, Dublin, Ireland.
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Zehlila A, Schaumann A, Mlouka AB, Bourguiba I, Hardouin J, Masmoudi O, Cosette P, Amri M, Jouenne T. Glioprotective effect of Ulva rigida extract against UVB cellular damages. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Amri F, Ghouili I, Tonon MC, Amri M, Masmoudi-Kouki O. Hemoglobin-Improved Protection in Cultured Cerebral Cortical Astroglial Cells: Inhibition of Oxidative Stress and Caspase Activation. Front Endocrinol (Lausanne) 2017; 8:67. [PMID: 28443065 PMCID: PMC5385367 DOI: 10.3389/fendo.2017.00067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 03/23/2017] [Indexed: 12/14/2022] Open
Abstract
Oxidative stress plays a major role in triggering astroglial cell death in diverse neuropathological conditions such as ischemia and neurodegenerative diseases. Numerous studies indicate that hemoglobin (Hb) is expressed in both resting and reactive glia cells, but nothing is known regarding a possible role of Hb on astroglial cell survival. Thus, the purpose of the present study was to investigate the potential glioprotective effect of Hb on hydrogen peroxide (H2O2)-induced oxidative stress and apoptosis in cultured rat astrocytes. Our study demonstrates that administration of graded concentrations of Hb (10-12 to 10-6 M) to H2O2-treated astrocytes reduces cell death in a concentration-dependent manner. H2O2 treatment induces the accumulation of reactive oxygen species (ROS) and nitric oxide (NO), a drop of the mitochondrial membrane potential, and a stimulation of caspase-3/7 activity. Exposure of H2O2-treated cells to Hb was accompanied by marked attenuations of ROS and NO surproductions, mitochondrial membrane potential reduction, and caspase-3/7 activity increase. The protective action of Hb was blocked by the protein kinase A (PKA) inhibitor H89, the protein kinase C (PKC) inhibitor chelerythrine, and the mitogen-activated protein (MAP)-kinase kinase (MEK) inhibitor U0126. Taken together, these data demonstrate for the first time that Hb is a glioprotective factor that protects astrocytes from apoptosis induced by oxidative stress and suggest that Hb may confer neuroprotection in neurodegenerative diseases. The anti-apoptotic activity of Hb on astrocytes is mediated through the PKA, PKC, and MAPK transduction pathways and can be accounted for by inhibition of oxidative stress-induced mitochondrial dysfunctions and caspase activation.
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Affiliation(s)
- Fatma Amri
- University of Tunis El Manar, Faculty of Sciences of Tunis, UR/11ES09 Laboratory of Functional Neurophysiology and Pathology, Tunis, Tunisia
| | - Ikram Ghouili
- University of Tunis El Manar, Faculty of Sciences of Tunis, UR/11ES09 Laboratory of Functional Neurophysiology and Pathology, Tunis, Tunisia
| | - Marie-Christine Tonon
- INSERM U1239, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, Institute for Research and Innovation in Biomedicine (IRIB), University of Rouen Normandie, Mont-Saint-Aignan, France
| | - Mohamed Amri
- University of Tunis El Manar, Faculty of Sciences of Tunis, UR/11ES09 Laboratory of Functional Neurophysiology and Pathology, Tunis, Tunisia
| | - Olfa Masmoudi-Kouki
- University of Tunis El Manar, Faculty of Sciences of Tunis, UR/11ES09 Laboratory of Functional Neurophysiology and Pathology, Tunis, Tunisia
- *Correspondence: Olfa Masmoudi-Kouki,
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Amri F, Ghouili I, Amri M, Carrier A, Masmoudi-Kouki O. Neuroglobin protects astroglial cells from hydrogen peroxide-induced oxidative stress and apoptotic cell death. J Neurochem 2016; 140:151-169. [DOI: 10.1111/jnc.13876] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 10/18/2016] [Accepted: 10/21/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Fatma Amri
- Université de Tunis El Manar; Faculté des Sciences de Tunis; UR/11ES09 Laboratory of Functional Neurophysiology and Pathology; Tunisia
- Centre de Recherche en Cancérologie de Marseille (CRCM); INSERM U1068; CNRS UMR7258; Aix-Marseille Université UM105; Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy; Marseille France
| | - Ikram Ghouili
- Université de Tunis El Manar; Faculté des Sciences de Tunis; UR/11ES09 Laboratory of Functional Neurophysiology and Pathology; Tunisia
| | - Mohamed Amri
- Université de Tunis El Manar; Faculté des Sciences de Tunis; UR/11ES09 Laboratory of Functional Neurophysiology and Pathology; Tunisia
| | - Alice Carrier
- Centre de Recherche en Cancérologie de Marseille (CRCM); INSERM U1068; CNRS UMR7258; Aix-Marseille Université UM105; Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy; Marseille France
| | - Olfa Masmoudi-Kouki
- Université de Tunis El Manar; Faculté des Sciences de Tunis; UR/11ES09 Laboratory of Functional Neurophysiology and Pathology; Tunisia
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Douiri S, Bahdoudi S, Hamdi Y, Cubì R, Basille M, Fournier A, Vaudry H, Tonon MC, Amri M, Vaudry D, Masmoudi-Kouki O. Involvement of endogenous antioxidant systems in the protective activity of pituitary adenylate cyclase-activating polypeptide against hydrogen peroxide-induced oxidative damages in cultured rat astrocytes. J Neurochem 2016; 137:913-30. [DOI: 10.1111/jnc.13614] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 02/09/2016] [Accepted: 02/24/2016] [Indexed: 02/04/2023]
Affiliation(s)
- Salma Douiri
- Laboratory of Functional Neurophysiology and Pathology; Research Unit UR/11ES09; Department of Biological Sciences; Faculty of Science of Tunis; University Tunis El Manar; Tunis Tunisia
| | - Seyma Bahdoudi
- Laboratory of Functional Neurophysiology and Pathology; Research Unit UR/11ES09; Department of Biological Sciences; Faculty of Science of Tunis; University Tunis El Manar; Tunis Tunisia
- Inserm U982; Laboratory of Neuronal and Neuroendocrine Communication and Differentiation; University of Rouen; Mont-Saint-Aignan France
| | - Yosra Hamdi
- Laboratory of Functional Neurophysiology and Pathology; Research Unit UR/11ES09; Department of Biological Sciences; Faculty of Science of Tunis; University Tunis El Manar; Tunis Tunisia
| | - Roger Cubì
- Inserm U982; Laboratory of Neuronal and Neuroendocrine Communication and Differentiation; University of Rouen; Mont-Saint-Aignan France
| | - Magali Basille
- Inserm U982; Laboratory of Neuronal and Neuroendocrine Communication and Differentiation; University of Rouen; Mont-Saint-Aignan France
- Regional Platform for Cell Imaging of Normandie (PRIMACEN); Institute for Biomedical Research and Innovation; University of Rouen; Mont-Saint-Aignan France
| | - Alain Fournier
- INRS - Institut Armand-Frappier; Laval Quebec Canada
- Laboratoire International Associé Samuel de Champlain; Institut Armand-Frappier; Laval Quebec Canada
- International Associated Laboratory Samuel de Champlain; University of Rouen; Mont-Saint-Aignan France
| | - Hubert Vaudry
- Inserm U982; Laboratory of Neuronal and Neuroendocrine Communication and Differentiation; University of Rouen; Mont-Saint-Aignan France
- Regional Platform for Cell Imaging of Normandie (PRIMACEN); Institute for Biomedical Research and Innovation; University of Rouen; Mont-Saint-Aignan France
- International Associated Laboratory Samuel de Champlain; University of Rouen; Mont-Saint-Aignan France
| | - Marie-Christine Tonon
- Inserm U982; Laboratory of Neuronal and Neuroendocrine Communication and Differentiation; University of Rouen; Mont-Saint-Aignan France
- Regional Platform for Cell Imaging of Normandie (PRIMACEN); Institute for Biomedical Research and Innovation; University of Rouen; Mont-Saint-Aignan France
| | - Mohamed Amri
- Laboratory of Functional Neurophysiology and Pathology; Research Unit UR/11ES09; Department of Biological Sciences; Faculty of Science of Tunis; University Tunis El Manar; Tunis Tunisia
| | - David Vaudry
- Inserm U982; Laboratory of Neuronal and Neuroendocrine Communication and Differentiation; University of Rouen; Mont-Saint-Aignan France
- Regional Platform for Cell Imaging of Normandie (PRIMACEN); Institute for Biomedical Research and Innovation; University of Rouen; Mont-Saint-Aignan France
- International Associated Laboratory Samuel de Champlain; University of Rouen; Mont-Saint-Aignan France
| | - Olfa Masmoudi-Kouki
- Laboratory of Functional Neurophysiology and Pathology; Research Unit UR/11ES09; Department of Biological Sciences; Faculty of Science of Tunis; University Tunis El Manar; Tunis Tunisia
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12
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Hamdi Y, Madfai H, Belhareth R, Mokni M, Masmoudi-Kouki O, Amri M. Prenatal exposure to cigarette smoke enhances oxidative stress in astrocytes of neonatal rat. Toxicol Mech Methods 2016; 26:231-7. [PMID: 26998663 DOI: 10.3109/15376516.2016.1156205] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Oxidative stress is involved in the pathogenesis of smoking-related disease. Protection of astrocytes from oxidative insult appears essential to maintain brain function. In this study, we have investigated the effect of gestational cigarette exposure on astrocyte survival. Pregnant female were randomly allocated to the control group or to the cigarette smoke group in which they were placed in an exposure chamber and inhale three cigarettes smoke twice a day for a period of 20 days. The control group was kept in the exposure chamber for the same duration, but without exposure to cigarette smoke. Newborn rats from both groups were weighed 24 h after birth and then cerebral hemispheres were collected for astrocyte culture. Incubation of astrocytes isolated from animals exposed to cigarette smoke with 300 μM H2O2 for 1 h induced a significant decrease of the proportion of surviving cells compared to cells isolated form control animals. We have observed that H2O2-treated astroglial cells derived from cigarette smoke exposure showed more reduced superoxide dismutase and catalase activities than H2O2-treated astroglial cells from control animals. In conclusion, this study indicates that astroglial cells derived from newborn rats exposed in utero to cigarette smoke are more vulnerable to oxidative assault than cultured astrocytes obtained from control animals. These results point out the existence of excitotoxic lesions in newborn exposed in utero to cigarette smoke and suggest that despite their high antioxidative activities, astrocytes cannot survive and protect neurons under massive oxidative stress.
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Affiliation(s)
- Yosra Hamdi
- a Laboratory of Functional Neurophysiology and Pathology, Research Unit UR11ES09, Department of Biological Sciences , Faculty of Science of Tunis, University Tunis El Manar , Tunis , Tunisia
| | - Hayfa Madfai
- a Laboratory of Functional Neurophysiology and Pathology, Research Unit UR11ES09, Department of Biological Sciences , Faculty of Science of Tunis, University Tunis El Manar , Tunis , Tunisia
| | - Rym Belhareth
- a Laboratory of Functional Neurophysiology and Pathology, Research Unit UR11ES09, Department of Biological Sciences , Faculty of Science of Tunis, University Tunis El Manar , Tunis , Tunisia
| | - Meherzia Mokni
- a Laboratory of Functional Neurophysiology and Pathology, Research Unit UR11ES09, Department of Biological Sciences , Faculty of Science of Tunis, University Tunis El Manar , Tunis , Tunisia
| | - Olfa Masmoudi-Kouki
- a Laboratory of Functional Neurophysiology and Pathology, Research Unit UR11ES09, Department of Biological Sciences , Faculty of Science of Tunis, University Tunis El Manar , Tunis , Tunisia
| | - Mohamed Amri
- a Laboratory of Functional Neurophysiology and Pathology, Research Unit UR11ES09, Department of Biological Sciences , Faculty of Science of Tunis, University Tunis El Manar , Tunis , Tunisia
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Elmann A, Telerman A, Erlank H, Ofir R, Kashman Y, Beit-Yannai E. Achillolide A Protects Astrocytes against Oxidative Stress by Reducing Intracellular Reactive Oxygen Species and Interfering with Cell Signaling. Molecules 2016; 21:301. [PMID: 26950103 PMCID: PMC6274406 DOI: 10.3390/molecules21030301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 02/23/2016] [Accepted: 02/25/2016] [Indexed: 11/17/2022] Open
Abstract
Achillolide A is a natural sesquiterpene lactone that we have previously shown can inhibit microglial activation. In this study we present evidence for its beneficial effects on astrocytes under oxidative stress, a situation relevant to neurodegenerative diseases and brain injuries. Viability of brain astrocytes (primary cultures) was determined by lactate dehydrogenase (LDH) activity, intracellular ROS levels were detected using 2',7'-dichlorofluorescein diacetate, in vitro antioxidant activity was measured by differential pulse voltammetry, and protein phosphorylation was determined using specific ELISA kits. We have found that achillolide A prevented the H₂O₂-induced death of astrocytes, and attenuated the induced intracellular accumulation of reactive oxygen species (ROS). These activities could be attributed to the inhibition of the H₂O₂-induced phosphorylation of MAP/ERK kinase 1 (MEK1) and p44/42 mitogen-activated protein kinases (MAPK), and to the antioxidant activity of achillolide A, but not to H₂O₂ scavenging. This is the first study that demonstrates its protective effects on brain astrocytes, and its ability to interfere with MAPK activation. We propose that achillolide A deserves further evaluation for its potential to be developed as a drug for the prevention/treatment of neurodegenerative diseases and brain injuries where oxidative stress is part of the pathophysiology.
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Affiliation(s)
- Anat Elmann
- Department of Food Quality and Safety, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel.
| | - Alona Telerman
- Department of Food Quality and Safety, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel.
| | - Hilla Erlank
- Department of Food Quality and Safety, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel.
| | - Rivka Ofir
- Dead Sea & Arava Science Center and Regenerative Medicine & Stem Cell Research Center, Ben-Gurion University of the Negev, Beer-Sheba 84105, Israel.
| | - Yoel Kashman
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of chemistry, Tel Aviv University, Ramat Aviv 69978, Israel.
| | - Elie Beit-Yannai
- Clinical Biochemistry and Pharmacology Department, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheba 84105, Israel.
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Elmann A, Telerman A, Mordechay S, Erlank H, Rindner M, Ofir R, Kashman Y. 3,5,4'-Trihydroxy-6,7,3'-trimethoxyflavone protects astrocytes against oxidative stress via interference with cell signaling and by reducing the levels of intracellular reactive oxygen species. Neurochem Int 2014; 78:67-75. [PMID: 25217804 DOI: 10.1016/j.neuint.2014.09.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 08/31/2014] [Accepted: 09/02/2014] [Indexed: 12/11/2022]
Abstract
Oxidative stress is tightly involved in various neurodegenerative diseases such as Parkinson's and Alzheimer's diseases, and conditions such as ischemia. Astrocytes, the most abundant glial cells in the brain, protect neurons from reactive oxygen species (ROS) and provide them with trophic support. Therefore, any damage to astrocytes will affect neuronal survival. In a previous study we have demonstrated that an extract prepared from the plant Achillea fragrantissima (Af) prevented the oxidative stress-induced death of astrocytes and attenuated the intracellular accumulation of ROS in astrocytes under oxidative stress. In the present study, using activity guided fractionation, we have purified from this plant the active compound, determined to be a flavonoid named 3,5,4'-trihydroxy-6,7,3'-trimethoxyflavone (TTF). The effects of TTF in any biological system have not been studied previously, and this is the first study to characterize the anti-oxidant and protective effects of this compound in the context of neurodegenerative diseases. Using primary cultures of astrocytes we have found that TTF prevented the hydrogen peroxide (H2O2)-induced death of astrocytes, and attenuated the intracellular accumulation of ROS following treatment of these cells with H2O2 or the peroxyl radicals generating molecule 2,2'-Azobis(amidinopropane) (ABAP). TTF also interfered with cell signaling events and inhibited the phosphorylation of the signaling proteins stress-activated protein kinase/c-Jun N-terminal kinase (SAPK/JNK), extracellular signal regulated kinase (ERK 1/2) and mitogen activated protein kinase kinase (MEK1) and the phosphorylation of the transcription factor cyclic AMP response element-binding protein (CREB). The mechanism of the protective effect of TTF against H2O2-cytotoxicity could not be attributed to a direct H2O2 scavenging but rather to the scavenging of free radicals as was shown in cell free systems. Thus, TTF might be a therapeutic candidate for the prevention/treatment of neurodegenerative diseases where oxidative stress is part of the pathophysiology.
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Affiliation(s)
- Anat Elmann
- Department of Food Quality and Safety, Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel.
| | - Alona Telerman
- Department of Food Quality and Safety, Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
| | - Sharon Mordechay
- Department of Food Quality and Safety, Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
| | - Hilla Erlank
- Department of Food Quality and Safety, Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
| | - Miriam Rindner
- Department of Food Quality and Safety, Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
| | - Rivka Ofir
- The Dead Sea & Arava Science Center and Regenerative Medicine & Stem Cell Research Center, Ben-Gurion University of the Negev, Beer-Sheba, 84105, Israel
| | - Yoel Kashman
- School of Chemistry, Tel Aviv University, Ramat Aviv 69978, Israel
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Oral toxicity of okadaic acid in mice: study of lethality, organ damage, distribution and effects on detoxifying gene expression. Toxins (Basel) 2013; 5:2093-108. [PMID: 24217398 PMCID: PMC3847716 DOI: 10.3390/toxins5112093] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 10/15/2013] [Accepted: 11/05/2013] [Indexed: 02/07/2023] Open
Abstract
In vivo, after administration by gavage to mice and rats, okadaic acid has been reported to produce lesions in liver, small intestine and forestomach. Because several reports differ in the damage detected in different organs, and on okadaic acid distribution after consumption, we determined the toxicity of this compound after oral administration to mice. After 24 hours, histopathological examination showed necrotic foci and lipid vacuoles in the livers of intoxicated animals. By immunohistochemical analysis, we detected this toxin in the liver and kidneys of intoxicated animals. Okadaic acid induces oxidative stress and can be activated in vitro into reactive compounds by the post-mitochondrial S9 fraction, so we studied the okadaic effect on the gene expression of antioxidant and phase II detoxifying enzymes in liver. We observed a downregulation in the expression of these enzymes and a reduction of protein expression of catalase and superoxide dismutase 1 in intoxicated animals.
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Protective and antioxidant effects of a chalconoid from Pulicaria incisa on brain astrocytes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:694398. [PMID: 24069503 PMCID: PMC3771428 DOI: 10.1155/2013/694398] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 07/24/2013] [Accepted: 07/25/2013] [Indexed: 12/23/2022]
Abstract
Oxidative stress is involved in the pathogenesis of neurodegenerative diseases such as Parkinson's and Alzheimer's diseases. Astrocytes, the most abundant glial cells in the brain, protect neurons from reactive oxygen species (ROS) and provide them with trophic support, such as glial-derived neurotrophic factor (GDNF). Thus, any damage to astrocytes will affect neuronal survival. In the present study, by activity-guided fractionation, we have purified from the desert plant Pulicaria incisa two protective compounds and determined their structures by spectroscopic methods. The compounds were found to be new chalcones—pulichalconoid B and pulichalconoid C. This is the first study to characterize the antioxidant and protective effects of these compounds in any biological system. Using primary cultures of astrocytes, we have found that pulichalconoid B attenuated the accumulation of ROS following treatment of these cells with hydrogen peroxide by 89% and prevented 89% of the H2O2-induced death of astrocytes. Pulichalconoid B exhibited an antioxidant effect both in vitro and in the cellular antioxidant assay in astrocytes and microglial cells. Pulichalconoid B also caused a fourfold increase in GDNF transcription in these cells. Thus, this chalcone deserves further studies in order to evaluate if beneficial therapeutic effect exists.
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Fernández-Sánchez MT, Cabrera-García D, Ferrero-Gutierrez A, Pérez-Gómez A, Cruz PG, Daranas AH, Fernández JJ, Norte M, Novelli A. Comparative toxicological study of the novel protein phosphatase inhibitor 19-Epi-okadaic acid in primary cultures of rat cerebellar cells. Toxicol Sci 2013; 132:409-18. [PMID: 23335626 DOI: 10.1093/toxsci/kft006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Okadaic acid (OKA) and analogues are frequent contaminants of coastal waters and seafood. Structure analysis of the isolated OKA analogue 19-epi-OKA showed important conformation differences expected to result in lower protein phosphatase (PP) inhibitory potencies than OKA. However, 19-epi-OKA and OKA inhibitory activities versus PP2A were unexpectedly found to be virtually equipotent. To investigate the toxicological relevance of these findings, we tested the effects of 19-epi-OKA on cultured cerebellar cells and compared them with those of OKA and its isomer dinophysistoxin-2. 19-epi-OKA caused degeneration of neurites and neuronal death with much lower potency than its congeners. The concentration of 19-epi-OKA that reduced after 24h the maximum neuronal survival (EC5024) by 50% was ~300nM compared with ~2nM and ~8nM for OKA and dinophysistoxin-2, respectively. Exposure to 19-epi-OKA resulted also in less toxicity for cultured glial cells (EC5024,19-epi-OKA ~ 600nM; EC5024,OKA ~ 20nM). 19-epi-OKA induced apoptotic condensation and fragmentation of chromatin, activation of caspases, and activation of ERK1/2 MAP kinases, features previously reported for OKA and dinophysistoxin-2. Also, differential sensitivity to 19-epi-OKA was observed between neuronal and glial cells, a specific characteristic shared by OKA and dinophysistoxin-2 but not by other toxins. Our results are consistent with 19-epi-OKA being included among the group of toxins of OKA and derivatives and support the suitability of cellular bioassays for the detection of these compounds.
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Affiliation(s)
- Maria-Teresa Fernández-Sánchez
- Instituto Universitario de Biotecnología de Asturias, Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, Oviedo, Spain.
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18
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Antioxidant and astroprotective effects of a Pulicaria incisa infusion. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2012; 2012:157598. [PMID: 23320126 PMCID: PMC3540991 DOI: 10.1155/2012/157598] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 11/21/2012] [Indexed: 12/30/2022]
Abstract
Oxidative stress is involved in the pathogenesis of neurodegenerative diseases such as Parkinson's and Alzheimer's diseases. Astrocytes, the most abundant glial cells in the brain, protect neurons from reactive oxygen species (ROS) and provide them with trophic support, such as glial-derived neurotrophic factor (GDNF). Thus, any damage to astrocytes will affect neuronal survival. In the present study, an infusion prepared from the desert plant Pulicaria incisa (Pi) was tested for its protective and antioxidant effects on astrocytes subjected to oxidative stress. The Pi infusion attenuated the intracellular accumulation of ROS following treatment with hydrogen peroxide and zinc and prevented the H(2)O(2)-induced death of astrocytes. The Pi infusion also exhibited an antioxidant effect in vitro and induced GDNF transcription in astrocytes. It is proposed that this Pi infusion be further evaluated for use as a functional beverage for the prevention and/or treatment of brain injuries and neurodegenerative diseases in which oxidative stress plays a role.
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Seo M, Kim JH, Cho YE, Baek MC, Suk K. Hypothermic regulation of astrocyte proteome profile in experimental stroke. Electrophoresis 2012; 33:3835-48. [DOI: 10.1002/elps.201200331] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 08/24/2012] [Accepted: 09/16/2012] [Indexed: 01/08/2023]
Affiliation(s)
- Minchul Seo
- Department of Pharmacology; Brain Science & Engineering Institute; Kyungpook National University School of Medicine; Daegu; Korea
| | - Jong-Heon Kim
- Department of Pharmacology; Brain Science & Engineering Institute; Kyungpook National University School of Medicine; Daegu; Korea
| | - Young-Eun Cho
- Department of Molecular Medicine; Cell & Matrix Biology Research Institute; Kyungpook National University School of Medicine; Daegu; Korea
| | - Moon-Chang Baek
- Department of Molecular Medicine; Cell & Matrix Biology Research Institute; Kyungpook National University School of Medicine; Daegu; Korea
| | - Kyoungho Suk
- Department of Pharmacology; Brain Science & Engineering Institute; Kyungpook National University School of Medicine; Daegu; Korea
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Valdiglesias V, Fernández-Tajes J, Pásaro E, Méndez J, Laffon B. Identification of differentially expressed genes in SHSY5Y cells exposed to okadaic acid by suppression subtractive hybridization. BMC Genomics 2012; 13:46. [PMID: 22284234 PMCID: PMC3296583 DOI: 10.1186/1471-2164-13-46] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 01/27/2012] [Indexed: 12/02/2022] Open
Abstract
Background Okadaic acid (OA), a toxin produced by several dinoflagellate species is responsible for frequent food poisonings associated to shellfish consumption. Although several studies have documented the OA effects on different processes such as cell transformation, apoptosis, DNA repair or embryogenesis, the molecular mechanistic basis for these and other effects is not completely understood and the number of controversial data on OA is increasing in the literature. Results In this study, we used suppression subtractive hybridization in SHSY5Y cells to identify genes that are differentially expressed after OA exposure for different times (3, 24 and 48 h). A total of 247 subtracted clones which shared high homology with known genes were isolated. Among these, 5 specific genes associated with cytoskeleton and neurotransmission processes (NEFM, TUBB, SEPT7, SYT4 and NPY) were selected to confirm their expression levels by real-time PCR. Significant down-regulation of these genes was obtained at the short term (3 and 24 h OA exposure), excepting for NEFM, but their expression was similar to the controls at 48 h. Conclusions From all the obtained genes, 114 genes were up-regulated and 133 were down-regulated. Based on the NCBI GenBank and Gene Ontology databases, most of these genes are involved in relevant cell functions such as metabolism, transport, translation, signal transduction and cell cycle. After quantitative PCR analysis, the observed underexpression of the selected genes could underlie the previously reported OA-induced cytoskeleton disruption, neurotransmission alterations and in vivo neurotoxic effects. The basal expression levels obtained at 48 h suggested that surviving cells were able to recover from OA-caused gene expression alterations.
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Affiliation(s)
- Vanessa Valdiglesias
- Toxicology Unit, Psychobiology Department, University of A Coruña, Edificio de Servicios Centrales de Investigación, Campus Elviña s/n, 15071 A Coruña, Spain
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Hamdi Y, Kaddour H, Vaudry D, Douiri S, Bahdoudi S, Leprince J, Castel H, Vaudry H, Amri M, Tonon MC, Masmoudi-Kouki O. The stimulatory effect of the octadecaneuropeptide ODN on astroglial antioxidant enzyme systems is mediated through a GPCR. Front Endocrinol (Lausanne) 2012; 3:138. [PMID: 23181054 PMCID: PMC3502939 DOI: 10.3389/fendo.2012.00138] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Astroglial cells possess an array of cellular defense systems, including superoxide dismutase (SOD) and catalase antioxidant enzymes, to prevent damage caused by oxidative stress on the central nervous system. Astrocytes specifically synthesize and release endozepines, a family of regulatory peptides including the octadecaneuropeptide (ODN). ODN is the ligand of both central-type benzodiazepine receptors (CBR), and an adenylyl cyclase- and phospholipase C-coupled receptor. We have recently shown that ODN is a potent protective agent that prevents hydrogen peroxide (H(2)O(2))-induced inhibition of SOD and catalase activities and stimulation of cell apoptosis in astrocytes. The purpose of the present study was to investigate the type of receptor involved in ODN-induced inhibition of SOD and catalase in cultured rat astrocytes. We found that ODN induced a rapid stimulation of SOD and catalase gene transcription in a concentration-dependent manner. In addition, 0.1 nM ODN blocked H(2)O(2)-evoked reduction of both mRNA levels and activities of SOD and catalase. Furthermore, the inhibitory actions of ODN on the deleterious effects of H(2)O(2) on SOD and catalase were abrogated by the metabotropic ODN receptor antagonist cyclo(1-8)[Dleu(5)]OP, but not by the CBR antagonist flumazenil. Finally, the protective action of ODN against H(2)O(2)-evoked inhibition of endogenous antioxidant systems in astrocytes was protein kinase A (PKA)-dependent, but protein kinase C-independent. Taken together, these data demonstrate for the first time that ODN, acting through its metabotropic receptor coupled to the PKA pathway, prevents oxidative stress-induced alteration of antioxidant enzyme expression and activities. The peptide ODN is thus a potential candidate for the development of specific agonists that would selectively mimic its protective activity.
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Affiliation(s)
- Yosra Hamdi
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
| | - Hadhemi Kaddour
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
| | - David Vaudry
- Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, University of RouenMont-Saint-Aignan, France
- International Associated Laboratory Samuel de ChamplainMont-Saint-Aignan, France
- Regional Platform for Cell Imaging of Haute-Normandie, Institute for Medical Research and Innovation, University of RouenMont-Saint-Aignan, France
| | - Salma Douiri
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
| | - Seyma Bahdoudi
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
| | - Jérôme Leprince
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
- Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, University of RouenMont-Saint-Aignan, France
- International Associated Laboratory Samuel de ChamplainMont-Saint-Aignan, France
| | - Hélène Castel
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
- Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, University of RouenMont-Saint-Aignan, France
| | - Hubert Vaudry
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
- Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, University of RouenMont-Saint-Aignan, France
- International Associated Laboratory Samuel de ChamplainMont-Saint-Aignan, France
- *Correspondence: Mohamed Amri, Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El Manar, 2092 Tunis, Tunisia. e-mail: ; Hubert Vaudry, Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, International Associated Laboratory Samuel de Champlain, Regional Platform for Cell Imaging of Haute-Normandie, Institute for Medical Research and Innovation, University of Rouen, 76821 Mont-Saint-Aignan, France. e-mail:
| | - Mohamed Amri
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
- *Correspondence: Mohamed Amri, Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El Manar, 2092 Tunis, Tunisia. e-mail: ; Hubert Vaudry, Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, International Associated Laboratory Samuel de Champlain, Regional Platform for Cell Imaging of Haute-Normandie, Institute for Medical Research and Innovation, University of Rouen, 76821 Mont-Saint-Aignan, France. e-mail:
| | - Marie-Christine Tonon
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
- Inserm U982, Laboratory of Neuronal and Neuroendocrine Communication and Differentiation, University of RouenMont-Saint-Aignan, France
| | - Olfa Masmoudi-Kouki
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El ManarTunis, Tunisia
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Valdiglesias V, Fernández-Tajes J, Costa C, Méndez J, Pásaro E, Laffon B. Alterations in metabolism-related genes induced in SHSY5Y cells by okadaic acid exposure. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2012; 75:844-856. [PMID: 22788371 DOI: 10.1080/15287394.2012.690703] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Okadaic acid (OA) is a widely distributed marine toxin produced by several phytoplanktonic species and responsible for diarrheic shellfish poisoning in humans. At the molecular level OA is a specific inhibitor of several types of serine/threonine protein phosphatases. Due to this enzymic inhibition, OA was reported to induce numerous alterations in relevant cellular physiological processes, including several metabolic pathways such as glucose uptake, lipolysis and glycolysis, heme metabolism, and glycogen and protein synthesis. In order to further understand the underlying mechanisms involved in OA-induced effects on cellular metabolism, the expression levels of six genes related to different catabolic and anabolic metabolism-related processes were analyzed by real-time polymerase chain reaction. Specifically, the expression patterns of GAPDH, TOMM5, SLC25A4, COII, QARS, and RGS5 genes were determined in SHSY5Y human neuroblastoma cells exposed to OA for 3, 24, or 48 h. All these genes showed alterations in their expression levels after at least one of the OA treatments tested. These alterations provide a basis to understand the mechanisms underlying the previously described OA-induced effects on different metabolic processes, mainly regarding glucose and mitochondrial metabolism. However, other OA-induced affected genes can not be ruled out, and further studies are required to more comprehensively characterize in the mechanisms of OA-induced interaction on cell metabolism.
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Affiliation(s)
- Vanessa Valdiglesias
- Toxicology Unit, Department of Psychobiology, University of A Coruña, A Coruña, Spain.
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23
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Hamdi Y, Masmoudi-Kouki O, Kaddour H, Belhadj F, Gandolfo P, Vaudry D, Mokni M, Leprince J, Hachem R, Vaudry H, Tonon MC, Amri M. Protective effect of the octadecaneuropeptide on hydrogen peroxide-induced oxidative stress and cell death in cultured rat astrocytes. J Neurochem 2011; 118:416-28. [DOI: 10.1111/j.1471-4159.2011.07315.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Valdiglesias V, Laffon B, Pásaro E, Cemeli E, Anderson D, Méndez J. Induction of oxidative DNA damage by the marine toxin okadaic acid depends on human cell type. Toxicon 2011; 57:882-8. [PMID: 21396392 DOI: 10.1016/j.toxicon.2011.03.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 02/19/2011] [Accepted: 03/01/2011] [Indexed: 12/19/2022]
Abstract
The marine toxin okadaic acid (OA) is the main representative of diarrhoeic shellfish poisoning (DSP) toxins. Its ingestion induces nausea, vomiting, diarrhoea and abdominal ache. It has also been found to trigger cellular and molecular effects at low concentrations. Its mechanism of action has not been described yet. Results of a previous study showed that OA can induce cytotoxic and genotoxic effects, both directly and indirectly, and modulations in DNA repair processes in three different types of human cells (leukocytes, SHSY5Y neuroblastoma and HepG2 cells). These effects varied depending on the type of cell and the concentration employed (Valdiglesias et al., 2010). On that basis, the ability of OA to induce oxidative DNA damage on the same cell types was investigated in the present study. To this end, the antioxidant enzymes catalase and N-acetylcysteine, and the human DNA- glycosylase hOGG1 were used in combination with the alkaline Comet assay. The cells were treated with a range of OA concentrations (5-1000 nM) in the presence and absence of S9 fraction. The results of this study showed that OA induces oxidative DNA damage directly in leukocytes, directly and indirectly in SHSY5Y cells, while it does not induce oxidative DNA damage in HepG2 cells. Combining the outcomes of both studies, the data showed that OA induces both cytotoxicity and genotoxicity, including DNA strand breaks and oxidative DNA damage, in the cells evaluated. However, the extent of these effects are cell type dependent.
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Affiliation(s)
- Vanessa Valdiglesias
- Toxicology Unit, Psychobiology Department, University of A Coruña, Edificio de Servicios Centrales de Investigación, Campus Elviña s/n, 15071 A Coruña, Spain
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Masmoudi-Kouki O, Douiri S, Hamdi Y, Kaddour H, Bahdoudi S, Vaudry D, Basille M, Leprince J, Fournier A, Vaudry H, Tonon MC, Amri M. Pituitary adenylate cyclase-activating polypeptide protects astroglial cells against oxidative stress-induced apoptosis. J Neurochem 2011; 117:403-11. [PMID: 21244427 DOI: 10.1111/j.1471-4159.2011.07185.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Oxidative stress, associated with a variety of disorders including neurodegenerative diseases, results from accumulation of reactive oxygen species (ROS). Oxidative stress is not only responsible for neuron apoptosis, but can also provoke astroglial cell death. Numerous studies indicate that pituitary adenylate cyclase-activating polypeptide (PACAP) promotes neuron survival, but nothing is known regarding the action of PACAP on astroglial cell survival. Thus, the purpose of the present study was to investigate the potential glioprotective effect of PACAP on H(2)O(2)-induced astrocyte death. Pre-treatment of cultured rat astrocytes with nanomolar concentrations of PACAP prevented cell death provoked by H(2)O(2) (300 μM), whereas vasoactive intestinal polypeptide was devoid of protective activity. The effect of PACAP on astroglial cell survival was abolished by the type 1 PACAP receptor antagonist, PACAP6-38. The protective action of PACAP was blocked by the protein kinase A inhibitor H89, the protein kinase C inhibitor chelerythrine and the mitogen-activated protein (MAP)-kinase kinase (MEK) inhibitor U0126. PACAP stimulated glutathione formation, and blocked H(2)O(2)-evoked ROS accumulation and glutathione content reduction. In addition, PACAP prevented the decrease of mitochondrial activity and caspase 3 activation induced by H(2)O(2). Taken together, these data indicate for the first time that PACAP, acting through type 1 PACAP receptor, exerts a potent protective effect against oxidative stress-induced astrocyte death. The anti-apoptotic activity of PACAP on astrocytes is mediated through the protein kinase A, protein kinase C and MAPK transduction pathways, and can be accounted for by inhibition of ROS-induced mitochondrial dysfunctions and caspase 3 activation.
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Affiliation(s)
- Olfa Masmoudi-Kouki
- Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El Manar, Tunis, Tunisia
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Improvements in the use of neuroblastomaxglioma hybrid cells (NG108-15) for the toxic effect quantification of marine toxins. Toxicon 2010; 55:381-9. [DOI: 10.1016/j.toxicon.2009.08.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Revised: 07/28/2009] [Accepted: 08/25/2009] [Indexed: 11/19/2022]
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Sala GL, Ronzitti G, Sasaki M, Fuwa H, Yasumoto T, Bigiani A, Rossini GP. Proteomic Analysis Reveals Multiple Patterns of Response in Cells Exposed to a Toxin Mixture. Chem Res Toxicol 2009; 22:1077-85. [DOI: 10.1021/tx900044p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Gian Luca Sala
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
| | - Giuseppe Ronzitti
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
| | - Makoto Sasaki
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
| | - Haruhiko Fuwa
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
| | - Takeshi Yasumoto
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
| | - Albertino Bigiani
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
| | - Gian Paolo Rossini
- Centro Interdisciplinare di Scienze e Tecnologie per la Qualità e Sicurezza degli Alimenti, Dipartimento di Scienze Biomediche, Università di Modena e Reggio Emilia, I-41100 Modena, Italy, Graduate School of Life Sciences, Tohoku University, Sendai 981-8555, Japan, and Okinawa Science and Technology Promotion Center, Okinawa, 904-2234, Japan
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