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Leite-Aguiar R, Cristina-Rodrigues F, Ciarlini-Magalhães R, Dantas DP, Alves VS, Gavino-Leopoldino D, Neris RLS, Schmitz F, Silveira JS, Kurtenbach E, Wyse ATS, Clarke JR, Figueiredo CP, Assunção-Miranda I, Pimentel-Coelho PM, Coutinho-Silva R, Savio LEB. ATP-P2X7 signaling mediates brain pathology while contributing to viral control in perinatal Zika virus infection. Brain Behav Immun 2024; 118:318-333. [PMID: 38460804 DOI: 10.1016/j.bbi.2024.02.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/24/2024] [Accepted: 02/27/2024] [Indexed: 03/11/2024] Open
Abstract
Zika virus (ZIKV), the causative agent of Zika fever, is a flavivirus transmitted by mosquitoes of the Aedes genus. Zika virus infection has become an international concern due to its association with severe neurological complications such as fetal microcephaly. Viral infection can induce the release of ATP in the extracellular environment, activating receptors sensitized by extracellular nucleotides, such as the P2X7 receptor. This receptor is the primary purinergic receptor involved in neuroinflammation, neurodegeneration, and immunity. In this work, we investigated the role of ATP-P2X7 receptor signaling in Zika-related brain abnormalities. Wild-type mice (WT) and P2X7 receptor-deficient (P2X7-/-) C57BL/6 newborn mice were subcutaneously inoculated with 5 × 106plaque-forming units of ZIKV or mock solution. P2X7 receptor expression increased in the brain of Zika virus-infected mice compared to the mock group. Comparative analyses of the hippocampi from WT and P2X7-/-mice revealed that the P2X7 receptor increased hippocampal damage in CA1/CA2 and CA3 regions. Doublecortin expression decreased significantly in the brains of ZIKV-infected mice. WT ZIKV-infected mice showed impaired motor performance compared to P2X7-/- infected mice. WT ZIKV-infected animals showed increased expression of glial markers GFAP (astrocytes) and IBA-1 (microglia) compared to P2X7-/- infected mice. Although the P2X7 receptor contributes to neuronal loss and neuroinflammation, WT mice were more efficient in controlling the viral load in the brain than P2X7 receptor-deficient mice. This result was associated with higher induction of TNF-α, IFN-β, and increased interferon-stimulated gene expression in WT mice than P2X7-/-ZIKV-infected. Finally, we found that the P2X7 receptor contributes to inhibiting the neuroprotective signaling pathway AKT/mTOR while stimulating the caspase-3 activation, possibly two distinct pathways contributing to neurodegeneration. These findings suggest that ATP-P2X7 receptor signaling contributes to the antiviral response in the brain of ZIKV-infected mice while increasing neuronal loss, neuroinflammation, and related brain abnormalities.
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Affiliation(s)
- Raíssa Leite-Aguiar
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabiana Cristina-Rodrigues
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Roberta Ciarlini-Magalhães
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Danillo Pereira Dantas
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vinícius Santos Alves
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Daniel Gavino-Leopoldino
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rômulo Leão Silva Neris
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Felipe Schmitz
- Departamento de Bioquímica, Instituto de Ciências Básicas de Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Josiane Silva Silveira
- Departamento de Bioquímica, Instituto de Ciências Básicas de Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Eleonora Kurtenbach
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Angela T S Wyse
- Departamento de Bioquímica, Instituto de Ciências Básicas de Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Julia Rosauro Clarke
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | | | - Iranaia Assunção-Miranda
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Robson Coutinho-Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Luiz Eduardo Baggio Savio
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
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Ferreira FS, Junior OVR, Dos Santos TM, Silveira JS, Deniz BF, Alves VS, Coutinho-Silva R, Savio LEB, Wyse ATS. Effect of Quinolinic Acid on Behavior, Morphology, and Expression of Inflammatory/oxidative Status in Rats' Striatum: Is Coenzyme Q 10 a Good Protector? Neurotox Res 2023; 41:559-570. [PMID: 37515718 DOI: 10.1007/s12640-023-00656-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 05/20/2023] [Accepted: 06/28/2023] [Indexed: 07/31/2023]
Abstract
Quinolinic acid (QUIN) is a toxic compound with pro-oxidant, pro-inflammatory, and pro-apoptotic actions found at high levels in the central nervous system (CNS) in several pathological conditions. Due to the toxicity of QUIN, it is important to evaluate strategies to protect against the damage caused by this metabolite in the brain. In this context, coenzyme Q10 (CoQ10) is a provitamin present in the mitochondria with a protective role in cells through several mechanisms of action. Based on these, the present study was aimed at evaluating the possible neuroprotective role of CoQ10 against damage caused by QUIN in the striatum of young Wistar rats. Twenty-one-day-old rats underwent a 10-day pretreatment with CoQ10 or saline (control) intraperitoneal injections and on the 30th day of life received QUIN intrastriatal or saline (control) administration. The animals were submitted to behavior tests or euthanized, and the striatum was dissected to neurochemical studies. Results showed that CoQ10 was able to prevent behavioral changes (the open field, object recognition, and pole test tasks) and neurochemical parameters (alteration in the gene expression of IL-1β, IL-6, SOD, and GPx, as well as in the immunocontent of cytoplasmic Nrf2 and nuclear p-Nf-κβ) caused by QUIN. These findings demonstrate the promising therapeutic effects of CoQ10 against QUIN toxicity.
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Affiliation(s)
- Fernanda Silva Ferreira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
| | - Osmar Vieira Ramires Junior
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
| | - Tiago Marcon Dos Santos
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
| | - Josiane Silva Silveira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
| | - Bruna Ferrary Deniz
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil
| | - Vinícius Santos Alves
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robson Coutinho-Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luiz Eduardo Baggio Savio
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Angela T S Wyse
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil.
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil.
- Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, 90035-003, Porto Alegre, RS, Brazil.
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Ramires Júnior OV, Silveira JS, Dos Santos TM, Ferreira FS, Vizuete AFK, Gonçalves CA, Wyse ATS. Homocysteine May Decrease Glucose Uptake and Alter the Akt/GSK3β/GLUT1 Signaling Pathway in Hippocampal Slices: Neuroprotective Effects of Rivastigmine and Ibuprofen. Mol Neurobiol 2023; 60:5468-5481. [PMID: 37314655 DOI: 10.1007/s12035-023-03408-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 05/25/2023] [Indexed: 06/15/2023]
Abstract
Homocysteine (Hcy) is a risk factor for neurodegenerative diseases, such as Alzheimer's Disease, and is related to cellular and tissue damage. In the present study, we verified the effect of Hcy on neurochemical parameters (redox homeostasis, neuronal excitability, glucose, and lactate levels) and the Serine/Threonine kinase B (Akt), Glucose synthase kinase-3β (GSK3β) and Glucose transporter 1 (GLUT1) signaling pathway in hippocampal slices, as well as the neuroprotective effects of ibuprofen and rivastigmine alone or in combination in such effects. Male Wistar rats (90 days old) were euthanized and the brains were dissected. The hippocampus slices were pre-treated for 30 min [saline medium or Hcy (30 µM)], then the other treatments were added to the medium for another 30 min [ibuprofen, rivastigmine, or ibuprofen + rivastigmine]. The dichlorofluorescein formed, nitrite and Na+, K+-ATPase activity was increased by Hcy at 30 µM. Ibuprofen reduced dichlorofluorescein formation and attenuated the effect of Hcy. The reduced glutathione content was reduced by Hcy. Treatments with ibuprofen and Hcy + ibuprofen increased reduced glutathione. Hcy at 30 µM caused a decrease in hippocampal glucose uptake and GLUT1 expression, and an increase in Glial Fibrillary Acidic Protein-protein expression. Phosphorylated GSK3β and Akt levels were reduced by Hcy (30 µM) and co-treatment with Hcy + rivastigmine + ibuprofen reversed these effects. Hcy toxicity on glucose metabolism can promote neurological damage. The combination of treatment with rivastigmine + ibuprofen attenuated such effects, probably by regulating the Akt/GSK3β/GLUT1 signaling pathway. Reversal of Hcy cellular damage by these compounds may be a potential neuroprotective strategy for brain damage.
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Affiliation(s)
- Osmar Vieira Ramires Júnior
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil
| | - Josiane Silva Silveira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil
| | - Tiago Marcon Dos Santos
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil
| | - Fernanda Silva Ferreira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil
| | - Adriana Fernanda K Vizuete
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratório de Proteínas Ligantes de Cálcio no SNC, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil
| | - Carlos Alberto Gonçalves
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratório de Proteínas Ligantes de Cálcio no SNC, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil
| | - Angela T S Wyse
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil.
- Laboratory of Neuroprotection and Neurometabolic Diseases (Wyse´s Lab), Department of Biochemistry, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035003, Brazil.
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Silveira JS, Júnior OVR, Schmitz F, Ferreira FS, Rodrigues FC, Deon M, Ribas G, Coutinho-Silva R, Vargas CR, Savio LEB, Wyse AT. High-protein nutrition during pregnancy increases neuroinflammation and homocysteine levels and impairs behavior in male adolescent rats offspring. Life Sci 2022; 310:121084. [DOI: 10.1016/j.lfs.2022.121084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/04/2022] [Accepted: 10/12/2022] [Indexed: 11/09/2022]
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Antunes GL, Silveira JS, Luft C, Greggio S, Venturin GT, Schmitz F, Biasibetti-Brendler H, Vuolo F, Dal-Pizzol F, da Costa JC, Wyse ATS, Pitrez PM, da Cunha AA. Airway inflammation induces anxiety-like behavior through neuroinflammatory, neurochemical, and neurometabolic changes in an allergic asthma model. Metab Brain Dis 2022; 37:911-926. [PMID: 35059965 DOI: 10.1007/s11011-022-00907-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 01/06/2022] [Indexed: 10/19/2022]
Abstract
Allergic asthma is characterized by chronic airway inflammation and is constantly associated with anxiety disorder. Recent studies showed bidirectional interaction between the brain and the lung tissue. However, where and how the brain is affected in allergic asthma remains unclear. We aimed to investigate the neuroinflammatory, neurochemical, and neurometabolic alterations that lead to anxiety-like behavior in an experimental model of allergic asthma. Mice were submitted to an allergic asthma model induced by ovalbumin (OVA) and the control group received only Dulbecco's phosphate-buffered saline (DPBS). Our findings indicate that airway inflammation increases interleukin (IL) -9, IL-13, eotaxin, and IL-1β release and changes acetylcholinesterase (AChE) and Na+,K+-ATPase activities in the brain of mice. Furthermore, we demonstrate that a higher reactive oxygen species (ROS) formation and antioxidant defense alteration that leads to protein damage and mitochondrial dysfunction. Therefore, airway inflammation promotes a pro-inflammatory environment with an increase of BDNF expression in the brain of allergic asthma mice. These pro-inflammatory environments lead to an increase in glucose uptake in the limbic regions and to anxiety-like behavior that was observed through the elevated plus maze (EPM) test and downregulation of glucocorticoid receptor (GR). In conclusion, the present study revealed for the first time that airway inflammation induces neuroinflammatory, neurochemical, and neurometabolic changes within the brain that leads to anxiety-like behavior. Knowledge about mechanisms that lead to anxiety phenotype in asthma is a beneficial tool that can be used for the complete management and treatment of the disease.
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Affiliation(s)
- Géssica Luana Antunes
- Infant Center, Pontifical Catholic University of Rio Grande Do Sul (PUCRS), 6690 Ipiranga Ave., Porto Alegre, RS, 90619-900, Brazil.
| | - Josiane Silva Silveira
- Infant Center, Pontifical Catholic University of Rio Grande Do Sul (PUCRS), 6690 Ipiranga Ave., Porto Alegre, RS, 90619-900, Brazil
| | - Carolina Luft
- Infant Center, Pontifical Catholic University of Rio Grande Do Sul (PUCRS), 6690 Ipiranga Ave., Porto Alegre, RS, 90619-900, Brazil
| | - Samuel Greggio
- Preclinical Research Center, Brain Institute - BraIns, Pontifical Catholic University of Rio Grande Do Sul, PUCRS, Porto Alegre, RS, Brazil
| | - Gianina Teribele Venturin
- Preclinical Research Center, Brain Institute - BraIns, Pontifical Catholic University of Rio Grande Do Sul, PUCRS, Porto Alegre, RS, Brazil
| | - Felipe Schmitz
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande Do Sul, UFRGS, Porto Alegre, RS, Brazil
| | - Helena Biasibetti-Brendler
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande Do Sul, UFRGS, Porto Alegre, RS, Brazil
| | - Francieli Vuolo
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Felipe Dal-Pizzol
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina, UNESC, Criciúma, SC, Brazil
| | - Jaderson Costa da Costa
- Preclinical Research Center, Brain Institute - BraIns, Pontifical Catholic University of Rio Grande Do Sul, PUCRS, Porto Alegre, RS, Brazil
| | - Angela T S Wyse
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande Do Sul, UFRGS, Porto Alegre, RS, Brazil
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Ferreira FS, Dos Santos TM, Ramires Junior OV, Silveira JS, Schmitz F, Wyse ATS. Quinolinic Acid Impairs Redox Homeostasis, Bioenergetic, and Cell Signaling in Rat Striatum Slices: Prevention by Coenzyme Q 10. Neurotox Res 2022; 40:473-484. [PMID: 35239160 DOI: 10.1007/s12640-022-00484-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 02/15/2022] [Accepted: 02/21/2022] [Indexed: 12/19/2022]
Abstract
Quinolinic acid (QUIN) is an important agonist of NMDA receptors that are found at high levels in cases of brain injury and neuroinflammation. Therefore, it is necessary to investigate neuroprotection strategies capable of neutralizing the effects of the QUIN on the brain. Coenzyme Q10 (CoQ10) is a provitamin that has an important antioxidant and anti-inflammatory action. This work aims to evaluate the possible neuroprotective effect of CoQ10 against the toxicity caused by QUIN. Striatal slices from 30-day-old Wistar rats were preincubated with CoQ10 25-100 μM for 15 min; then, QUIN 100 μM was added to the incubation medium for 30 min. A dose-response curve was used to select the CoQ10 concentration to be used in the study. Results showed that QUIN caused changes in the production of ROS, nitrite levels, activities of antioxidant enzymes, glutathione content, and damage to proteins and lipids. CoQ10 was able to prevent the effects caused by QUIN, totally or partially, except for damage to proteins. QUIN also altered the activities of electron transport chain complexes and ATP levels, and CoQ10 prevented totally and partially these effects, respectively. CoQ10 prevented the increase in acetylcholinesterase activity, but not the decrease in the activity of Na+,K+-ATPase caused by QUIN. We also observed that QUIN caused changes in the total ERK and phospho-Akt content, and these effects were partially prevented by CoQ10. These findings suggest that CoQ10 may be a promising therapeutic alternative for neuroprotection against QUIN neurotoxicity.
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Affiliation(s)
- Fernanda Silva Ferreira
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil.,Laboratório de Neuroproteção E Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil
| | - Tiago Marcon Dos Santos
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil.,Laboratório de Neuroproteção E Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil
| | - Osmar Vieira Ramires Junior
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil.,Laboratório de Neuroproteção E Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil
| | - Josiane Silva Silveira
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil.,Laboratório de Neuroproteção E Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil
| | - Felipe Schmitz
- Laboratório de Neuroproteção E Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil
| | - Angela T S Wyse
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil. .,Laboratório de Neuroproteção E Doenças Neurometabólicas, Departamento de Bioquímica, ICBS, UFRGS, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, 90035-003, Brazil. .,Departamento de Bioquímica, ICBS, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600-Anexo, CEP, Porto Alegre, RS, 90035-003, Brazil.
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Silveira JS, Ramires Júnior OV, Schmitz F, Ferreira FS, Rodrigues FC, Silva RC, Savio LEB, Wyse ATS. Folic acid supplementation during pregnancy alters behavior in male rat offspring: nitrative stress and neuroinflammatory implications. Mol Neurobiol 2022; 59:2150-2170. [PMID: 35044624 DOI: 10.1007/s12035-022-02724-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/30/2021] [Indexed: 12/27/2022]
Abstract
Pregnancy diet can impact offspring's neurodevelopment, metabolism, redox homeostasis, and inflammatory status. In pregnancy, folate demand is increased due to the requirement for one-carbon transfer reactions. The present study was proposed to investigate the effect of folic acid supplementation throughout pregnancy on a battery of behavior tests (olfactory preference, motor activity, exploratory capacity, habituation, memory, anxiety- and depression-like behavior). Redox homeostasis and neuroinflammatory status in cerebral cortex were also investigated. After pregnancy confirmation, the pregnant rats were randomly divided into two groups, according to the diet: group 1, (control) standard diet (2 mg/kg diet of folic acid) and group 2, supplemented diet with 4 mg/kg diet of folic acid. Throughout the gestational period, the pregnant rats received experimental diets. Results show that the supplemented diet with 4 mg/kg diet of folic acid throughout pregnancy impaired memory and motricity of the offspring when compared with control (standard diet). It was also observed an increase in anxiety- and depression-like behavior in this group. Nitrite levels increased in cerebral cortex of the offspring, when compared to control group. In contrast, iNOS expression and immunocontent were not altered. Moreover, we identify an increase in TNF-α, IL-1β, IL-6, IL-10, and MCP-1 gene expression in the cerebral cortex. In conclusion, our study showed that the supplemented diet with 4 mg/kg diet of folic acid throughout pregnancy may cause behavioral and biochemical changes in the male offspringGraphical abstract After pregnancy confirmation, the pregnant rats were randomly divided into two groups, according to the diet: group 1, (control) standard diet (2 mg/kg diet of folic acid) and group 2, supplemented diet with 4 mg/kg diet of folic acid. Throughout the gestational period, the pregnant rats received experimental diets. Results show that folic acid supplementation did not impair the mother-pup relationship. We showed that supplemented diet with 4 mg/kg diet of folic acid during pregnancy impairs memory and motricity of the offspring when compared with standard diet. It was also observed an increase in anxiety- and depression-like behavior in this group. Nitrative stress and neuroinflammation parameters were increased in the cerebral cortex of the offspring. ROS, reactive oxygen species.
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Affiliation(s)
- Josiane Silva Silveira
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,Laboratório de Neuroproteção E Doenças Metabólicas (Wyse's Lab), Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, Rio Grande do Sul, 90035003, Brazil
| | - Osmar Vieira Ramires Júnior
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,Laboratório de Neuroproteção E Doenças Metabólicas (Wyse's Lab), Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, Rio Grande do Sul, 90035003, Brazil
| | - Felipe Schmitz
- Laboratório de Neuroproteção E Doenças Metabólicas (Wyse's Lab), Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, Rio Grande do Sul, 90035003, Brazil
| | - Fernanda Silva Ferreira
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil.,Laboratório de Neuroproteção E Doenças Metabólicas (Wyse's Lab), Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, Rio Grande do Sul, 90035003, Brazil
| | - Fabiana Cristina Rodrigues
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Bloco G. Av. Carlos Chagas Filho, 373. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Robson Coutinho Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Bloco G. Av. Carlos Chagas Filho, 373. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Luiz Eduardo Baggio Savio
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Bloco G. Av. Carlos Chagas Filho, 373. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Angela T S Wyse
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil. .,Laboratório de Neuroproteção E Doenças Metabólicas (Wyse's Lab), Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, Rio Grande do Sul, 90035003, Brazil.
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da Cunha AA, Silveira JS, Antunes GL, Abreu da Silveira K, Benedetti Gassen R, Vaz Breda R, Márcio Pitrez P. Cysteinyl leukotriene induces eosinophil extracellular trap formation via cysteinyl leukotriene 1 receptor in a murine model of asthma. Exp Lung Res 2021; 47:355-367. [PMID: 34468256 DOI: 10.1080/01902148.2021.1923864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PURPOSE Eosinophils are one of the main cells responsible to the inflammatory response in asthma by the release of inflammatory molecules such as cytokines, reactive oxygen species (ROS), cytotoxic granule, eosinophil extracellular trap (EET), and lipid mediators as cysteinyl leukotriene (cysLT). The interconnections between these molecules are not fully understood. Here, we attempted to investigate the cysLT participation in the mechanisms of EET formation in an asthma model of OVA challenge. MATERIALS AND METHODS Before intranasal challenge with OVA, BALB/cJ mice were treated with a 5-lipoxygenase-activating protein (FLAP) inhibitor (MK-886), or with a cysLT1 receptor antagonist (MK-571) and the lung and bronchoalveolar lavage fluid (BALF) were analyzed. RESULTS We showed that OVA-challenged mice treated with MK-886 or MK-571 had a decrease in inflammatory cells, goblet cells hyperplasia, and eosinophil peroxidase (EPO) activity in the airway. However, only OVA-challenged mice treated with MK-571 had an improvement in lung function. Also, treatments with MK-886 or MK-571 decreased Th2 cytokines levels in the airway. Moreover, we observed that OVA-challenged mice treated with MK-886 or MK-571 had a decrease in EET formation in BALF. We also verified that EET release was not due to cell death because the cell viability remained the same among the groups. CONCLUSION We revealed that the decrease in cysLT production or cysLT1 receptor inhibition by MK-886 or/and MK-571 treatments, respectively reduced EET formation in BALF, showing that cysLT regulates the activation process of EET release in asthma.
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Affiliation(s)
| | - Josiane Silva Silveira
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Keila Abreu da Silveira
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Rodrigo Benedetti Gassen
- Laboratory of Cellular and Molecular Immunology, Science School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Ricardo Vaz Breda
- Institute of the Brain (BraIns), Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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Antunes GL, Silveira JS, Kaiber DB, Luft C, Dos Santos TM, Marques EP, Ferreira FS, Schmitz F, de Souza Wyse AT, Stein RT, Pitrez PM, da Cunha AA. Neostigmine treatment induces neuroprotection against oxidative stress in cerebral cortex of asthmatic mice. Metab Brain Dis 2020; 35:765-774. [PMID: 32189127 DOI: 10.1007/s11011-020-00558-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 03/02/2020] [Indexed: 10/24/2022]
Abstract
During chronic inflammatory disease, such asthma, leukocytes can invade the central nervous system (CNS) and together with CNS-resident cells, generate excessive reactive oxygen species (ROS) production as well as disbalance in the antioxidant system, causing oxidative stress, which contributes a large part to neuroinflammation. In this sense, the aim of this study is to investigate the effects of treatment with neostigmine, known for the ability to control lung inflammation, on oxidative stress in the cerebral cortex of asthmatic mice. Female BALB/cJ mice were submitted to asthma model induced by ovalbumin (OVA). Control group received only Dulbecco's phosphate-buffered saline (DPBS). To evaluate neostigmine effects, mice received 80 μg/kg of neostigmine intraperitoneally 30 min after each OVA challenge. Our results revealed for the first time that treatment with neostigmine (an acetylcholinesterase inhibitor that no crosses the BBB) was able to revert ROS production and change anti-oxidant enzyme catalase in the cerebral cortex in asthmatic mice. These results support the communication between the peripheral immune system and the CNS and suggest that acetylcholinesterase inhibitors, such as neostigmine, should be further studied as possible therapeutic strategies for neuroprotection in asthma.
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Affiliation(s)
- Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Josiane Silva Silveira
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Daniela Benvenutti Kaiber
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Carolina Luft
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Tiago Marcon Dos Santos
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Eduardo Peil Marques
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Fernanda Silva Ferreira
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Felipe Schmitz
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Angela Terezinha de Souza Wyse
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Renato Tetelbom Stein
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Paulo Márcio Pitrez
- Infant Center, Institutional Research Coordinator, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Hospital Moinhos de Vento, Porto Alegre, Brazil
| | - Aline Andrea da Cunha
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.
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Haute GV, Luft C, Antunes GL, Silveira JS, de Souza Basso B, da Costa MS, Levorse VGS, Kaiber DB, Donadio MVF, Gracia-Sancho J, de Oliveira JR. Anti-inflammatory effect of octyl gallate in alveolar macrophages cells and mice with acute lung injury. J Cell Physiol 2020; 235:6073-6084. [PMID: 31970778 DOI: 10.1002/jcp.29536] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 01/09/2020] [Indexed: 01/07/2023]
Abstract
Acute lung injury (ALI) is an inflammatory process, and has high incidence and mortality. ALI and the acute respiratory distress syndrome are two common complications worldwide that result in acute lung failure, sepsis, and death. Pro-inflammatory substances, such as cytokines and chemokines, are responsible for activating the body's defense mechanisms and usually mediate inflammatory processes. Therefore, the research of substances that decrease the uncontrolled response of organism is seen as potential for patients with ALI. Octyl gallate (OG) is a phenolic compound with therapeutic actions namely antimicrobial, antiviral, and antifungal. In this study, we evaluated its action on lipopolysaccharide (LPS)-activated alveolar macrophages RAW 264.7 cells and ALI in male mice. Our results demonstrated protective effects of OG in alveolar macrophages activated with LPS and mice with ALI. The OG treatment significantly decreased the inflammatory markers in both studies in vitro and in vivo. The data suggested that OG can act as an anti-inflammatory agent for ALI.
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Affiliation(s)
- Gabriela Viegas Haute
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Departamento de Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Carolina Luft
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Departamento de Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,Laboratório de Respirologia Pediátrica, Instituto de Pesquisas Biomédicas (IPB), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Géssica Luana Antunes
- Laboratório de Respirologia Pediátrica, Instituto de Pesquisas Biomédicas (IPB), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Josiane Silva Silveira
- Laboratório de Respirologia Pediátrica, Instituto de Pesquisas Biomédicas (IPB), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Bruno de Souza Basso
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Departamento de Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Mariana Severo da Costa
- Laboratório de Respirologia Pediátrica, Instituto de Pesquisas Biomédicas (IPB), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Vitor Giancarlo Schneider Levorse
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Departamento de Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Daniela Benvenutti Kaiber
- Laboratório de Respirologia Pediátrica, Instituto de Pesquisas Biomédicas (IPB), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Márcio Vinícius Fagundes Donadio
- Laboratório de Respirologia Pediátrica, Instituto de Pesquisas Biomédicas (IPB), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Jordi Gracia-Sancho
- Barcelona Hepatic Hemodynamic Laboratory, IDIBAPS - Hospital Clinic de Barcelona - CIBEREHD, Barcelona, Spain.,Hepatology, Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Jarbas Rodrigues de Oliveira
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Departamento de Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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11
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Silveira JS, Antunes GL, Gassen RB, Breda RV, Stein RT, Pitrez PM, da Cunha AA. Respiratory syncytial virus increases eosinophil extracellular traps in a murine model of asthma. Asia Pac Allergy 2019; 9:e32. [PMID: 31720243 PMCID: PMC6826116 DOI: 10.5415/apallergy.2019.9.e32] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 10/10/2019] [Indexed: 12/31/2022] Open
Abstract
Background Respiratory viral infections are the leading cause of asthma exacerbations. Eosinophil activation results in the formation of eosinophil extracellular traps (EETs), which release web-like structures of DNA and proteins that bind, disarm and extracellularly kill pathogens. Objective We investigated whether the respiratory syncytial virus (RSV) in vitro could induce EETs in bronchoalveolar lavage fluid eosinophils in a murine model of asthma. Methods BALB/cJ mice (6–8 weeks old) were sensitized with 2 subcutaneous injections of ovalbumin (20 μg) on days 0 and 7, followed by three intranasal challenges with ovalbumin (100 μg) on days 14, 15, and 16 of the protocol. The control group received Dulbecco's phosphate-buffered saline. Bronchoalveolar lavage fluid eosinophils of ovalbumin group or control group were stimulated with RSV (103 PFU/mL) in vitro for 3 hours. After that, culture supernatant was collected to perform the analyses proposed in this study. Results We verified an increase in extracellular DNA concentration in bronchoalveolar lavage fluid eosinophils from ovalbumin group stimulated with RSV (103 PFU/mL) in vitro, which was confirmed by confocal microscopy. We demonstrated that most cells are negative for annexin V and propidium iodide in all groups evaluated. Also, RSV in vitro decreased interferon-ɣ in culture supernatant when compared to the ovalbumin group. Conclusion In this study, we demonstrated for the first time that RSV in vitro induces EETs formation in eosinophils from asthmatic mice.
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Affiliation(s)
- Josiane Silva Silveira
- Department of Biochemistry, Laboratory of Neuroprotection and Neurometabolic Disease, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Géssica Luana Antunes
- Laboratory of Pediatric Respirology - Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Rodrigo Benedetti Gassen
- Laboratory of Cellular and Molecular Immunology, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Ricardo Vaz Breda
- Laboratory of Neuroscience - Brain Institute, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Renato Tetelbom Stein
- Laboratory of Pediatric Respirology - Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Paulo Márcio Pitrez
- Laboratory of Pediatric Respirology - Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil.,Hospital Moinhos de Vento, Porto Alegre, Rio Grande do Sul, Brazil
| | - Aline Andrea da Cunha
- Laboratory of Pediatric Respirology - Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil.,Hospital Moinhos de Vento, Porto Alegre, Rio Grande do Sul, Brazil
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Antunes GL, Silveira JS, Kaiber DB, Luft C, da Costa MS, Marques EP, Ferreira FS, Breda RV, Wyse ATS, Stein RT, Pitrez PM, da Cunha AA. Cholinergic anti-inflammatory pathway confers airway protection against oxidative damage and attenuates inflammation in an allergic asthma model. J Cell Physiol 2019; 235:1838-1849. [PMID: 31332773 DOI: 10.1002/jcp.29101] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 06/27/2019] [Indexed: 12/20/2022]
Abstract
Asthma is characterized by the influx of inflammatory cells, especially of eosinophils as well as reactive oxygen species (ROS) production, driven by the release of the T helper 2 (Th2)-cell-associated cytokines. The cholinergic anti-inflammatory pathway (CAP) inhibit cytokines production and controls inflammation. Thus, we investigated the effects of pharmacological activation of CAP by neostigmine on oxidative stress and airway inflammation in an allergic asthma model. After the OVA challenge, mice were treated with neostigmine. We showed that CAP activation by neostigmine reduced the levels of pro-inflammatory cytokines (IL-4, IL-5, IL-13, IL-1β, and TNF-α), which resulted in a decrease of eosinophils influx. Furthermore, neostigmine also conferred airway protection against oxidative stress, attenuating ROS production through the increase of antioxidant defense, evidenced by the catalase (CAT) activity. We propose, for the first time, that pharmacological activation of the CAP can lead to new possibilities in the therapeutic management of allergic asthma.
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Affiliation(s)
- Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Josiane Silva Silveira
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Daniela Benvenutti Kaiber
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Carolina Luft
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Mariana Severo da Costa
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Eduardo Peil Marques
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Fernanda Silva Ferreira
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Ricardo Vaz Breda
- Laboratory of Neurosciences, Brain Institute - BraIns, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Angela T S Wyse
- Laboratory of Neuroprotection and Metabolic Disease, Department of Biochemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre, Brazil
| | - Renato Tetelbom Stein
- Laboratory of Pediatric Respirology, Infant Center, School of Medical, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Paulo Márcio Pitrez
- Laboratory of Pediatric Respirology, Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Hospital Moinhos de Vento, HMV, Porto Alegre, Brazil
| | - Aline Andrea da Cunha
- Laboratory of Pediatric Respirology, Infant Center, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Hospital Moinhos de Vento, HMV, Porto Alegre, Brazil
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13
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Silveira JS, Antunes GL, Kaiber DB, da Costa MS, Ferreira FS, Marques EP, Schmitz F, Gassen RB, Breda RV, Wyse ATS, Stein RT, Pitrez PM, da Cunha AA. Autophagy induces eosinophil extracellular traps formation and allergic airway inflammation in a murine asthma model. J Cell Physiol 2019; 235:267-280. [PMID: 31206674 DOI: 10.1002/jcp.28966] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 05/10/2019] [Accepted: 05/28/2019] [Indexed: 12/14/2022]
Abstract
Studies have shown autophagy participation in the immunopathology of inflammatory diseases. However, autophagy role in asthma and in eosinophil extracellular traps (EETs) release is poorly understood. Here, we attempted to investigate the autophagy involvement in EETs release and in lung inflammation in an experimental asthma model. Mice were sensitized with ovalbumin (OVA), followed by OVA challenge. Before the challenge with OVA, mice were treated with an autophagy inhibitor, 3-methyladenine (3-MA). We showed that 3-MA treatment decreases the number of eosinophils, eosinophil peroxidase (EPO) activity, goblet cells hyperplasia, proinflammatory cytokines, and nuclear factor kappa B (NFκB) p65 immunocontent in the lung. Moreover, 3-MA was able to improve oxidative stress, mitochondrial energy metabolism, and Na+ , K+ -ATPase activity. We demonstrated that treatment with autophagy inhibitor 3-MA reduced EETs formation in the airway. On the basis of our results, 3-MA treatment can be an interesting alternative for reducing lung inflammation, oxidative stress, mitochondrial damage, and EETs formation in asthma.
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Affiliation(s)
- Josiane Silva Silveira
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Daniela Benvenutti Kaiber
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Mariana Severo da Costa
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Fernanda Silva Ferreira
- Laboratory of Neuroprotection and Neurometabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Eduardo Peil Marques
- Laboratory of Neuroprotection and Neurometabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Felipe Schmitz
- Laboratory of Neuroprotection and Neurometabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Rodrigo Benedetti Gassen
- Laboratory of Cellular and Molecular Immunology, School of Science, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Ricardo Vaz Breda
- School of Medicine, Instituto do Cérebro do Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Angela T S Wyse
- Laboratory of Neuroprotection and Neurometabolic Disease, Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Renato Tetelbom Stein
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Paulo Márcio Pitrez
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Aline Andrea da Cunha
- Laboratory of Pediatric Respirology, Infant Center, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Silveira JS, Antunes GL, Kaiber DB, da Costa MS, Marques EP, Ferreira FS, Gassen RB, Breda RV, Wyse ATS, Pitrez P, da Cunha AA. Reactive oxygen species are involved in eosinophil extracellular traps release and in airway inflammation in asthma. J Cell Physiol 2019; 234:23633-23646. [PMID: 31180592 DOI: 10.1002/jcp.28931] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/19/2022]
Abstract
In asthma, there are high levels of inflammatory mediators, reactive oxygen species (ROS), and eosinophil extracellular traps (EETs) formation in airway. Here, we attempted to investigate the ROS involvement in EETs release and airway inflammation in OVA-challenged mice. Before the intranasal challenge with ovalbumin (OVA), animals were treated with two ROS inhibitors, N-acetylcysteine (NAC) or diphenyleneiodonium (DPI). We showed that NAC treatment reduced inflammatory cells in lung. DPI and NAC treatments reduced eosinophil peroxidase (EPO), goblet cells hyperplasia, proinflammatory cytokines, NFκB p65 immunocontent, and oxidative stress in lung. However, only the NAC treatment improved mitochondrial energy metabolism. Moreover, the treatments with DPI and NAC reduced EETs release in airway. This is the first study to show that ROS are needed for EETs formation in asthma. Based on our results, NAC and DPI treatments can be an interesting alternative for reducing airway inflammation, mitochondrial damage, and EETs release in asthma.
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Affiliation(s)
- Josiane Silva Silveira
- Department of Biochemistry, Laboratory of Neuroprotection and Neurometabolic Disease, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Daniela Benvenutti Kaiber
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Mariana Severo da Costa
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Eduardo Peil Marques
- Department of Biochemistry, Laboratory of Neuroprotection and Neurometabolic Disease, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda Silva Ferreira
- Department of Biochemistry, Laboratory of Neuroprotection and Neurometabolic Disease, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Rodrigo Benedetti Gassen
- Laboratory of Cellular and Molecular Immunology, Science School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Ricardo Vaz Breda
- Institute of the Brain (INSCER), Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Angela T S Wyse
- Department of Biochemistry, Laboratory of Neuroprotection and Neurometabolic Disease, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Paulo Pitrez
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Aline Andrea da Cunha
- Laboratory of Pediatric Respirology, Infant Center, Medicine School, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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da Cunha AA, Nuñez NK, de Souza RG, Moraes Vargas MH, Silveira JS, Antunes GL, Durante LDS, Porto BN, Marczak ES, Jones MH, Pitrez PM. Recombinant human deoxyribonuclease therapy improves airway resistance and reduces DNA extracellular traps in a murine acute asthma model. Exp Lung Res 2016; 42:66-74. [PMID: 27070484 DOI: 10.3109/01902148.2016.1143537] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
PURPOSE Asthma is a highly prevalent chronic inflammatory lung disease characterized by airway hyperresponsiveness to allergens, airway edema, and increased mucus secretion. Such mucus can be liquefied by recombinant human deoxyribonuclease (rhDNase), in which efficacy of rhDNase has been well documented in patients with cystic fibrosis, but little studied in asthma. In the present study, we investigated whether rhDNase intranasal administration improved inflammation and pulmonary function in an experimental model of asthma. METHODS Mice were sensitized by two subcutaneous injections of ovalbumin (OVA), on days 0 and 7, followed by three intranasal challenges with OVA on days 14, 15, and 16. A control group, replacing OVA by DPBS, was included. On days 15 and 16, after 2 hours of OVA challenge, mice received 1 mg/mL of intranasal rhDNase. RESULTS We showed that rhDNase decreased significantly the airway resistance and reduced EETs formation and globet cells hyperplasia. CONCLUSIONS Our results suggest that extracellular DNA in mucus play a role in lower airways obstruction in OVA asthma protocol and that the treatment with rhDNase improved lung function and DNA extracellular traps, with no direct cellular anti-inflammatory effects.
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Affiliation(s)
- Aline Andrea da Cunha
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Nailê Karine Nuñez
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Rodrigo Godinho de Souza
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Mauro Henrique Moraes Vargas
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Josiane Silva Silveira
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Géssica Luana Antunes
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Laíse da Silva Durante
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Bárbara Nery Porto
- b Laboratory of Clinical and Experimental Immunology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Elisa Simon Marczak
- c Laboratory of Cellular and Molecular Immunology, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Marcus Herbert Jones
- d Laboratory of Respiratory Physiology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
| | - Paulo Márcio Pitrez
- a Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research , Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre , Brazil
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Nuñez NK, da Cunha AA, Dos Santos Dutra M, Barbosa GL, Morassutti AL, de Souza RG, Vargas MHM, Antunes GL, Silveira JS, da Silva GL, Pitrez PM. Acute and chronic exposure to Tyrophagus putrescentiae induces allergic pulmonary response in a murine model. Asia Pac Allergy 2016; 6:48-55. [PMID: 26844220 PMCID: PMC4731481 DOI: 10.5415/apallergy.2016.6.1.48] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 12/31/2015] [Indexed: 12/25/2022] Open
Abstract
Background Tyrophagus putrescentiae (Tp) is a source of aeroallergen that causes allergic diseases. Objective To describe an acute and chronic murine model of allergic asthma with Tp extract with no systemic sensitization and no use of adjuvant. Methods Mites from dust sample were cultured and a raw extract was produced. Female BALB/c mice (6-8 weeks) were challenged intranasally with Tp extract or Dulbecco's phosphate-buffered saline, for 10 consecutive days (acute protocol) or for 6 weeks (chronic protocol). Twenty-four hours after the last intranasal challenge, bronchoalveolar lavage fluid (BALF) was performed for total and differential cells count, cytokine analysis, and eosinophil peroxidase activity. Lung tissue was also removed for histopathologic analysis. Results Tp extract has shown a significant increase in total cells count from BALF as well as an increase in absolute eosinophils count, eosinophil peroxidase activity, interleukin (IL)-5 and IL-13 levels, in both acute and chronic protocols. Peribronchovascular infiltrate, goblet cells hyperplasia and collagen deposition were shown in the airways of acute and chronic Tp-exposed mice. Conclusion Our data suggest that the intranasal exposure to Tp extract, with no systemic sensitization and no use of adjuvants, induces a robust allergic inflammation in the lungs of mice, in both acute and chronic models. Our Tp extract seems to be a potent allergen extract which may be used in asthma model studies.
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Affiliation(s)
- Nailê Karine Nuñez
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | - Aline Andrea da Cunha
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | - Moisés Dos Santos Dutra
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | - Gustavo Leivas Barbosa
- Laboratory of Parasitology, Universidade Regional Integrada do Alto Uruguai e das Missões, Santiago 97700-000, Brazil
| | | | - Rodrigo Godinho de Souza
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | - Mauro Henrique Moraes Vargas
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | - Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | - Josiane Silva Silveira
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
| | | | - Paulo Márcio Pitrez
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-000, Brazil
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da Cunha AA, Nuñez NK, de Souza RG, Vargas MHM, Silveira JS, Antunes GL, Schmitz F, de Souza Wyse AT, Jones MH, Pitrez PM. Recombinant human deoxyribonuclease attenuates oxidative stress in a model of eosinophilic pulmonary response in mice. Mol Cell Biochem 2016; 413:47-55. [PMID: 26738487 DOI: 10.1007/s11010-015-2638-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 12/23/2015] [Indexed: 12/14/2022]
Abstract
The inflammatory cells infiltrating the airways produce several mediators, such as reactive oxygen species (ROS). ROS and the oxidant-antioxidant imbalance might play an important role in the modulation of airways inflammation. In order to avoid the undesirable effects of ROS, various endogenous antioxidant strategies have evolved, incorporating both enzymatic and non-enzymatic mechanisms. Recombinant human deoxyribonuclease (rhDNase) in clinical studies demonstrated a reduction in sputum viscosity, cleaving extracellular DNA in the airways, and facilitating mucus clearance, but an antioxidant effect was not studied so far. Therefore, we evaluated whether the administration of rhDNase improves oxidative stress in a murine model of asthma. Mice were sensitized by two subcutaneous injections of ovalbumin (OVA), on days 0 and 7, followed by three lung challenges with OVA on days 14, 15, and 16. On days 15 and 16, after 2 h of the challenge with OVA, mice received 1 mg/mL of rhDNase in the lungs. Bronchoalveolar lavage fluid and lung tissue were obtained on day 17, for inflammatory and oxidative stress analysis. We showed that rhDNase did not alter the population of inflammatory cells, such as eosinophil cells, in OVA-treated rhDNase group but significantly improved oxidative stress in lung tissue, by decreasing oxygen reactive species and increasing superoxide dismutase/catalase ratio, glutathione peroxidase activity, and thiol content. Our data provide the first evidence that rhDNase decreases some measures of oxidative stress and antioxidant status in a murine model of asthma, with a potential antioxidant effect to be further studied in human asthma.
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Affiliation(s)
- Aline Andrea da Cunha
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil.
| | - Nailê Karine Nuñez
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil
| | - Rodrigo Godinho de Souza
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil
| | - Mauro Henrique Moraes Vargas
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil
| | - Josiane Silva Silveira
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil
| | - Géssica Luana Antunes
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil
| | - Felipe Schmitz
- Laboratory of Neuroprotection and Neurometabolic Disease, Department of Biochemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Angela Terezinha de Souza Wyse
- Laboratory of Neuroprotection and Neurometabolic Disease, Department of Biochemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marcus Herbert Jones
- Laboratory of Respiratory Physiology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Paulo Márcio Pitrez
- Laboratory of Pediatric Respirology, Infant Center, Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, 6690 Ipiranga Avenue, 2nd Floor, Room 13, Porto Alegre, RS, 90610-000, Brazil
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de Lima SMA, Ahnelt PK, Carvalho TO, Silveira JS, Rocha FAF, Saito CA, Silveira LCL. Horizontal cells in the retina of a diurnal rodent, the agouti ( Dasyprocta aguti ). Vis Neurosci 2006; 22:707-20. [PMID: 16469182 DOI: 10.1017/s0952523805226032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2004] [Accepted: 04/22/2005] [Indexed: 11/07/2022]
Abstract
The morphology and distribution of normally placed and displaced A horizontal cells were studied in the retina of a diurnal hystricomorph rodent, the agouti Dasyprocta aguti. Cells were labeled with anti-calbindin immunocytochemistry. Dendritic-field size reaches a minimum in the visual streak, of about 9,000 microm(2), and increases toward the retinal periphery both in the dorsal and ventral regions. There is a dorsoventral asymmetry, with dorsal cells being larger than ventral cells at equal distances from the streak. The peak value for cell density of 281 +/- 28 cells/mm(2) occurs in the center of the visual streak, decreasing toward the dorsal and ventral retinal periphery, paralleling the increase in dendritic-field size. Along the visual streak, the decline in cell density is less pronounced, remaining between 100-200 cells/mm(2) in the temporal and nasal periphery. Displaced horizontal cells are rare and occur in the retinal periphery. They tend to be smaller than normally placed horizontal cells in the ventral region, whilst no systematic difference was observed between the two cell groups in the dorsal region. Mosaic regularity was studied using nearest-neighbor analysis and the Ripley function. When mosaic regularity was determined removing the displaced horizontal cells, there was a slight increase in the conformity ratio, but the bivariate Ripley function indicated some repulsive dependence between the two mosaics. Both results were near the level of significance. A similar analysis performed in the capybara retina, a closely related hystricomorph rodent bearing a higher density of displaced horizontal cells than found in the agouti, suggested spatial independence between the two mosaics, normally placed versus displaced horizontal cells.
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Affiliation(s)
- S M A de Lima
- Departamento de Fisiologia, Centro de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil.
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