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Gonçalves M, Rodrigues-Santos P, Januário C, Cosentino M, Pereira FC. Indoleamine 2,3-dioxygenase (IDO1) - Can dendritic cells and monocytes expressing this moonlight enzyme change the phase of Parkinson's Disease? Int Immunopharmacol 2024; 133:112062. [PMID: 38652967 DOI: 10.1016/j.intimp.2024.112062] [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: 02/23/2024] [Revised: 03/31/2024] [Accepted: 04/08/2024] [Indexed: 04/25/2024]
Abstract
Parkinson's Disease (PD) is the second most common neurodegenerative disease where central and peripheral immune dysfunctions have been pointed out as a critical component of susceptibility and progression of this disease. Dendritic cells (DCs) and monocytes are key players in promoting immune response regulation and can induce the enzyme indoleamine 2,3-dioxygenase 1 (IDO1) under pro-inflammatory environments. This enzyme with catalytic and signaling activity supports the axis IDO1-KYN-aryl hydrocarbon receptor (AhR), promoting disease-specific immunomodulatory effects. IDO1 is a rate-limiting enzyme of the kynurenine pathway (KP) that begins tryptophan (Trp) catabolism across this pathway. The immune functions of the pathway, which are extensively described in cancer, have been forgotten so far in neurodegenerative diseases, where a chronic inflammatory environment underlines the progression of the disease. Despite dysfunctions of KP have been described in PD, these are mainly associated with neurotoxic functions. With this review, we aim to focus on the immune properties of IDO1+DCs and IDO1+monocytes as a possible strategy to balance the pro-inflammatory profile described in PD. We also highlight the importance of exploring the role of dopaminergic therapeutics in IDO1 modulation to possibly optimize current PD therapeutic strategies.
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Affiliation(s)
- Milene Gonçalves
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal; Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal; University of Coimbra, Institute for Interdisciplinary Research, Doctoral Programme in Experimental Biology and Biomedicine (PDBEB), Portugal
| | - Paulo Rodrigues-Santos
- Univ Coimbra, Institute of Immunology, Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Center for Neuroscience and Cell Biology, Coimbra, Portugal
| | - Cristina Januário
- Univ Coimbra, CIBIT - Coimbra Institute for Biomedical Imaging and Translational Research, Coimbra, Portugal
| | - Marco Cosentino
- Univ Insubria, Center for Research in Medical Pharmacology, Varese, Italy
| | - Frederico C Pereira
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal; Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.
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Gonçalves M, Furgiuele A, Rasini E, Legnaro M, Ferrari M, Luini A, Rodrigues-Santos P, Caramelo F, Marino F, Pereira FC, Cosentino M. A peripheral blood mononuclear cell-based in vitro model: A tool to explore indoleamine 2, 3-dioxygenase-1 (IDO1). Eur J Pharmacol 2024; 968:176420. [PMID: 38367683 DOI: 10.1016/j.ejphar.2024.176420] [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: 10/10/2023] [Revised: 01/29/2024] [Accepted: 02/13/2024] [Indexed: 02/19/2024]
Abstract
BACKGROUND Proinflammatory cytokines powerfully induce the rate-limiting enzyme indoleamine 2, 3-dioxygenase-1 (IDO-1) in dendritic cells (DCs) and monocytes, it converts tryptophan (Trp) into L-kynurenine (KYN), along the kynurenine pathway (KP). This mechanism represents a crucial innate immunity regulator that can modulate T cells. This work explores the role of IDO1 in lymphocyte proliferation within a specific pro-inflammatory milieu. METHODS Peripheral blood mononuclera cells (PBMCs) were isolated from buffy coats taken from healthy blood donors and exposed to a pro-inflammatory milieu triggered by a double-hit stimulus: lipopolysaccharide (LPS) plus anti-CD3/CD28. The IDO1 mRNA levels in the PBMCs were measured by RT-PCR; the IDO1 activity was analyzed using the KYN/Trp ratio, measured by HPLC-EC; and lymphocyte proliferation was measured by flow cytometry. Trp and epacadostat (EP) were used as an IDO1 substrate and inhibitor, respectively. KYN, which is known to modulate Teffs, was tested as a positive control in lymphocyte proliferation. RESULTS IDO1 expression and activity in PBMCs increased in an in vitro pro-inflammatory milieu. The lymphoid stimulus increased IDO1 expression and activity, which supports the interaction between the activated lymphocytes and the circulating myeloid IDO1-expressing cells. The addition of Trp decreased lymphocyte proliferation but EP, which abrogated the IDO1 function, had no impact on proliferation. Additionally, incubation with KYN seemed to decrease the lymphocyte proliferation. CONCLUSION IDO1 inhibition did not change T lymphocyte proliferation. We present herein an in vitro experimental model suitable to measure IDO1 expression and activity in circulating myeloid cells.
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Affiliation(s)
- Milene Gonçalves
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal; Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal; Univ Coimbra, Institute for Interdisciplinary Research, Doctoral Programme in Experimental Biology and Biomedicine (PDBEB), Coimbra, Portugal
| | - Alessia Furgiuele
- Center for Research in Medical Pharmacology, Univ Insubria, Varese, Italy
| | - Emanuela Rasini
- Center for Research in Medical Pharmacology, Univ Insubria, Varese, Italy
| | | | - Marco Ferrari
- Center for Research in Medical Pharmacology, Univ Insubria, Varese, Italy
| | - Alessandra Luini
- Center for Research in Medical Pharmacology, Univ Insubria, Varese, Italy
| | - Paulo Rodrigues-Santos
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Institute of Immunology, Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Center for Neuroscience and Cell Biology, Coimbra, Portugal
| | - Francisco Caramelo
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal
| | - Franca Marino
- Center for Research in Medical Pharmacology, Univ Insubria, Varese, Italy
| | - Frederico C Pereira
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, Coimbra, Portugal; Univ Coimbra, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal; Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.
| | - Marco Cosentino
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.
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Lino MM, Rondão T, Banerjee A, Aires I, Rodrigues M, Reis T, Santinha A, Fernandes D, Serrenho D, Sobrino T, Sargento-Freitas J, Pereira FC, Carvalho AL, Ferreira L. Small extracellular vesicles administered directly in the brain promote neuroprotection and decreased microglia reactivity in a stroke mouse model. Nanoscale 2023; 15:18212-18217. [PMID: 37933179 DOI: 10.1039/d3nr03861k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Herein, we investigate the bioactivity of small extracellular vesicles (sEVs), focusing on their local effect in the brain. sEVs from mononuclear cells (MNCs) showed superior effects in vitro to sEVs from mesenchymal stem cells (MSCs) and were able to promote neuroprotection and decrease microglia reactivity in a stroke mouse model.
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Affiliation(s)
- Miguel M Lino
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Tiago Rondão
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Arnab Banerjee
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Inês Aires
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Magda Rodrigues
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Tiago Reis
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - António Santinha
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Dominique Fernandes
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
| | - Débora Serrenho
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
- PhD Programme in Experimental Biology and Biomedicine, Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Portugal
| | - Tomás Sobrino
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | | | - Frederico C Pereira
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- iCBR, Coimbra Institute for Clinical and Biomedical Research, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Portugal
| | - Ana Luísa Carvalho
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
- Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Lino Ferreira
- CNC - Centre for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Furgiuele A, Pereira FC, Martini S, Marino F, Cosentino M. Dopaminergic regulation of inflammation and immunity in Parkinson's disease: friend or foe? Clin Transl Immunology 2023; 12:e1469. [PMID: 37781343 PMCID: PMC10540835 DOI: 10.1002/cti2.1469] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 02/11/2022] [Accepted: 09/16/2023] [Indexed: 10/03/2023] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disease affecting 7-10 million people worldwide. Currently, there is no treatment available to prevent or delay PD progression, partially due to the limited understanding of the pathological events which lead to the death of dopaminergic neurons in the substantia nigra in the brain, which is known to be the cause of PD symptoms. The current available treatments aim at compensating dopamine (DA) deficiency in the brain using its precursor levodopa, dopaminergic agonists and some indirect dopaminergic agents. The immune system is emerging as a critical player in PD. Therefore, immune-based approaches have recently been proposed to be used as potential antiparkinsonian agents. It has been well-known that dopaminergic pathways play a significant role in regulating immune responses in the brain. Although dopaminergic agents are the primary antiparkinsonian treatments, their immune regulatory effect has yet to be fully understood. The present review summarises the current available evidence of the immune regulatory effects of DA and its mimics and discusses dopaminergic agents as antiparkinsonian drugs. Based on the current understanding of their involvement in the regulation of neuroinflammation in PD, we propose that targeting immune pathways involved in PD pathology could offer a better treatment outcome for PD patients.
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Affiliation(s)
- Alessia Furgiuele
- Center for Research in Medical PharmacologyUniversity of InsubriaVareseItaly
| | - Frederico C Pereira
- Faculty of Medicine, Institute of Pharmacology and Experimental TherapeuticsUniversity of CoimbraCoimbraPortugal
- Faculty of Medicine, Institute for Clinical and Biomedical Research (iCBR)University of CoimbraCoimbraPortugal
- Center for Innovative Biomedicine and Biotechnology (CIBB)University of CoimbraCoimbraPortugal
- Clinical Academic Center of Coimbra (CACC)CoimbraPortugal
| | - Stefano Martini
- Center for Research in Medical PharmacologyUniversity of InsubriaVareseItaly
| | - Franca Marino
- Center for Research in Medical PharmacologyUniversity of InsubriaVareseItaly
| | - Marco Cosentino
- Center for Research in Medical PharmacologyUniversity of InsubriaVareseItaly
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Barbosa J, Leal S, Pereira FC, Dinis-Oliveira RJ, Faria J. Tramadol and Tapentadol Induce Conditioned Place Preference with a Differential Impact on Rewarding Memory and Incubation of Craving. Pharmaceuticals (Basel) 2023; 16:ph16010086. [PMID: 36678582 PMCID: PMC9864601 DOI: 10.3390/ph16010086] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Tramadol and tapentadol, synthetic opioids commonly prescribed for moderate-to-severe pain, have a unique pharmacology that optimizes their analgesia and safety. However, they are not devoid of risks, presenting addictive, abuse, and dependence potential. While tramadol-reinforcing properties have been documented by various studies with human and animal models, including conditioned place preference (CPP) assays, no similar studies have been performed with tapentadol. In the present study, we performed CPP assays by intraperitoneally administering Wistar rats with a tramadol/tapentadol therapeutic dose. Animal permanence and the number of entries in the CPP compartments were recorded in the preconditioning phase and then 1 (T1), 7 (T7), and 14 (T14) days after conditioning. Both opioids induced a change in place preference (T1), suggesting that they have short-term reinforcing properties. However, only tramadol was associated with place preference retention (T7 and T14), with an increase in the number of entries in the opioid-paired compartment (T1 and T7), showing that it causes rewarding memory and incubation of craving. The results indicate that at therapeutic doses: (1) both drugs cause short-term rewarding effects and (2) as opposed to tramadol, tapentadol does not cause CPP retention, despite its higher central nervous system activity and stricter scheduling.
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Affiliation(s)
- Joana Barbosa
- TOXRUN—Toxicology Research Unit, University Institute of Health Sciences—CESPU (IUCS-CESPU), 4585-116 Gandra, PRD, Portugal
- UCIBIO-REQUIMTE—Applied Molecular Biosciences Unit-Network of Chemistry and Technology, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- Correspondence: (J.B.); (J.F.)
| | - Sandra Leal
- TOXRUN—Toxicology Research Unit, University Institute of Health Sciences—CESPU (IUCS-CESPU), 4585-116 Gandra, PRD, Portugal
- CINTESIS@RISE—Center for Health Technology and Services Research of the Health Research Network, MEDCIDS—Department of Community Medicine, Information and Health Decision Sciences, Faculty of Medicine, University of Porto, Rua Dr. Plácido da Costa, 4200-450 Porto, Portugal
| | - Frederico C. Pereira
- Institute of Pharmacology and Experimental Therapeutics/iCBR—Coimbra Institute for Clinical and Biomedical Research, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal
| | - Ricardo Jorge Dinis-Oliveira
- TOXRUN—Toxicology Research Unit, University Institute of Health Sciences—CESPU (IUCS-CESPU), 4585-116 Gandra, PRD, Portugal
- UCIBIO-REQUIMTE—Applied Molecular Biosciences Unit-Network of Chemistry and Technology, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- Department of Public Health and Forensic Sciences, and Medical Education, Faculty of Medicine, University of Porto, 4099-002 Porto, Portugal
- MTG Research and Development Lab, 4200-604 Porto, Portugal
| | - Juliana Faria
- TOXRUN—Toxicology Research Unit, University Institute of Health Sciences—CESPU (IUCS-CESPU), 4585-116 Gandra, PRD, Portugal
- UCIBIO-REQUIMTE—Applied Molecular Biosciences Unit-Network of Chemistry and Technology, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- Correspondence: (J.B.); (J.F.)
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Palavra F, Viana SD, Henriques S, Dinis J, Martins J, Madeira MH, Santiago R, Petrella L, Sereno J, Castelo-Branco M, Pereira FC, Almeida L, Ambrósio AF, Reis F. Defining milestones for the study of remyelination using the cuprizone mouse model: how early is early? Mult Scler Relat Disord 2022; 63:103886. [DOI: 10.1016/j.msard.2022.103886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 04/06/2022] [Accepted: 05/13/2022] [Indexed: 10/18/2022]
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Ribeiro D, Petrigna L, Pereira FC, Muscella A, Bianco A, Tavares P. The Impact of Physical Exercise on the Circulating Levels of BDNF and NT 4/5: A Review. Int J Mol Sci 2021; 22:ijms22168814. [PMID: 34445512 PMCID: PMC8396229 DOI: 10.3390/ijms22168814] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/26/2021] [Accepted: 08/06/2021] [Indexed: 12/12/2022] Open
Abstract
(1) Background: One mechanism through which physical activity (PA) provides benefits is by triggering activity at a molecular level, where neurotrophins (NTs) are known to play an important role. However, the expression of the circulating levels of neurotrophic factors, brain-derived neurotrophic factor (BDNF) and neurotrophin-4 (NT-4/5), in response to exercise, is not fully understood. Therefore, the aim was to provide an updated overview on the neurotrophin (NT) variation levels of BDNF and NT-4/5 as a consequence of a long-term aerobic exercise intervention, and to understand and describe whether the upregulation of circulating NT levels is a result of neurotrophic factors produced and released from the brain, and/or from neurotrophic secreting peripheral organs. (2) Methods: The articles were collected from PubMed, SPORTDiscus, Web of Science, MEDLINE, and Embase. Data were analyzed through a narrative synthesis. (3) Results: 30 articles studied humans who performed training protocols that ranged from 4 to 48 weeks; 22 articles studied rodents with an intervention period that ranged from 4 to 64 weeks. (4) Conclusions: There is no unanimity between the upregulation of BDNF in humans; conversely, concerning both BDNF and NT-4/5 in animal models, the results are heterogeneous. Whilst BDNF upregulation appears to be in relative agreement, NT-4/5 seems to display contradictory and inconsistent conclusions.
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Affiliation(s)
- Daniel Ribeiro
- University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra Institute for Clinical and Biomedical Research, 3004-504 Coimbra, Portugal; (D.R.); (P.T.)
- University of Coimbra, Faculty of Medicine, Institute of Pharmacology and Experimental Therapeutics, 3004-504 Coimbra, Portugal;
- University of Coimbra, Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, 3004-504 Coimbra, Portugal
| | - Luca Petrigna
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, 90144 Palermo, Italy;
- Correspondence:
| | - Frederico C. Pereira
- University of Coimbra, Faculty of Medicine, Institute of Pharmacology and Experimental Therapeutics, 3004-504 Coimbra, Portugal;
- University of Coimbra, Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, 3004-504 Coimbra, Portugal
- University of Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), 3004-504 Coimbra, Portugal
| | - Antonella Muscella
- Department of Biological and Environmental Science and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy;
| | - Antonino Bianco
- Sport and Exercise Sciences Research Unit, Department of Psychology, Educational Science and Human Movement, University of Palermo, 90144 Palermo, Italy;
| | - Paula Tavares
- University of Coimbra, Faculty of Sport Sciences and Physical Education, Coimbra Institute for Clinical and Biomedical Research, 3004-504 Coimbra, Portugal; (D.R.); (P.T.)
- University of Coimbra, Faculty of Medicine, Institute of Pharmacology and Experimental Therapeutics, 3004-504 Coimbra, Portugal;
- University of Coimbra, Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, 3004-504 Coimbra, Portugal
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Mota SI, Pita I, Águas R, Tagorti S, Virmani A, Pereira FC, Rego AC. Mechanistic perspectives on differential mitochondrial-based neuroprotective effects of several carnitine forms in Alzheimer's disease in vitro model. Arch Toxicol 2021; 95:2769-2784. [PMID: 34164711 DOI: 10.1007/s00204-021-03104-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 01/22/2021] [Accepted: 06/15/2021] [Indexed: 11/29/2022]
Abstract
Mitochondrial deregulation has emerged as one of the earliest pathological events in Alzheimer's disease (AD), the most common age-related neurodegenerative disorder. Improvement of mitochondrial function in AD has been considered a relevant therapeutic approach. L-carnitine (LC), an amino acid derivative involved in the transport of long-chain fatty acids into mitochondria, was previously demonstrated to improve mitochondrial function, having beneficial effects in neurological disorders; moreover, acetyl-L-carnitine (ALC) is currently under phase 4 clinical trial for AD (ClinicalTrials.gov NCT01320527). Thus, in the present study, we investigated the impact of different forms of carnitines, namely LC, ALC and propionyl-L-carnitine (PLC) on mitochondrial toxicity induced by amyloid-beta peptide 1-42 oligomers (AβO; 1 μM) in mature rat hippocampal neurons. Our results indicate that 5 mM LC, ALC and PLC totally rescued the mitochondrial membrane potential and alleviated both the decrease in oxygen consumption rates and the increase in mitochondrial fragmentation induced by AβO. These could contribute to the prevention of neuronal death by apoptosis. Moreover, only ALC ameliorated AβO-evoked changes in mitochondrial movement by reducing the number of stationary mitochondria and promoting reversal mitochondrial movement. Data suggest that carnitines (LC, ALC and PLC) may act differentially to counteract changes in mitochondrial function and movement in neurons subjected to AβO, thus counteracting AD-related pathological phenotypes.
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Affiliation(s)
- Sandra I Mota
- CNC-Center for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-504, Coimbra, Portugal
- IIIUC - Institute for Interdisciplinary Research, University of Coimbra, 3030-789, Coimbra, Portugal
| | - Inês Pita
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3004-504, Coimbra, Portugal
| | - Rodolfo Águas
- CNC-Center for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-504, Coimbra, Portugal
| | - Slah Tagorti
- Alfasigma B.V, 3528 BG, Utrecht, The Netherlands
| | | | - Frederico C Pereira
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3004-504, Coimbra, Portugal.
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3004-504, Coimbra, Portugal.
| | - A Cristina Rego
- CNC-Center for Neuroscience and Cell Biology, CIBB - Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-504, Coimbra, Portugal.
- Institute of Biochemistry, Faculty of Medicine, University of Coimbra, 3004-504, Coimbra, Portugal.
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Pereira FC. Keep an eye on the impact of caffeine on the recovery of the cardiovascular system after exercise. Rev Port Cardiol 2021; 40:407-408. [PMID: 34274080 DOI: 10.1016/j.repce.2021.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Frederico C Pereira
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal.
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Novo JP, Martins B, Raposo RS, Pereira FC, Oriá RB, Malva JO, Fontes-Ribeiro C. Cellular and Molecular Mechanisms Mediating Methylmercury Neurotoxicity and Neuroinflammation. Int J Mol Sci 2021; 22:ijms22063101. [PMID: 33803585 PMCID: PMC8003103 DOI: 10.3390/ijms22063101] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/06/2021] [Accepted: 03/15/2021] [Indexed: 02/06/2023] Open
Abstract
Methylmercury (MeHg) toxicity is a major environmental concern. In the aquatic reservoir, MeHg bioaccumulates along the food chain until it is consumed by riverine populations. There has been much interest in the neurotoxicity of MeHg due to recent environmental disasters. Studies have also addressed the implications of long-term MeHg exposure for humans. The central nervous system is particularly susceptible to the deleterious effects of MeHg, as evidenced by clinical symptoms and histopathological changes in poisoned humans. In vitro and in vivo studies have been crucial in deciphering the molecular mechanisms underlying MeHg-induced neurotoxicity. A collection of cellular and molecular alterations including cytokine release, oxidative stress, mitochondrial dysfunction, Ca2+ and glutamate dyshomeostasis, and cell death mechanisms are important consequences of brain cells exposure to MeHg. The purpose of this review is to organize an overview of the mercury cycle and MeHg poisoning events and to summarize data from cellular, animal, and human studies focusing on MeHg effects in neurons and glial cells. This review proposes an up-to-date compendium that will serve as a starting point for further studies and a consultation reference of published studies.
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Affiliation(s)
- João P. Novo
- Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), and Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.P.N.); (B.M.); (R.S.R.); (F.C.P.)
| | - Beatriz Martins
- Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), and Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.P.N.); (B.M.); (R.S.R.); (F.C.P.)
| | - Ramon S. Raposo
- Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), and Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.P.N.); (B.M.); (R.S.R.); (F.C.P.)
- Experimental Biology Core, University of Fortaleza, Health Sciences, Fortaleza 60110-001, Brazil
| | - Frederico C. Pereira
- Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), and Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.P.N.); (B.M.); (R.S.R.); (F.C.P.)
| | - Reinaldo B. Oriá
- Laboratory of Tissue Healing, Ontogeny and Nutrition, Department of Morphology and Institute of Biomedicine, School of Medicine, Federal University of Ceará, Fortaleza 60430-270, Brazil;
| | - João O. Malva
- Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), and Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.P.N.); (B.M.); (R.S.R.); (F.C.P.)
- Correspondence: (J.O.M.); (C.F.-R.)
| | - Carlos Fontes-Ribeiro
- Institute for Clinical and Biomedical Research (iCBR), Center for Innovative Biomedicine and Biotechnology (CIBB), and Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.P.N.); (B.M.); (R.S.R.); (F.C.P.)
- Correspondence: (J.O.M.); (C.F.-R.)
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11
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Affiliation(s)
- Frederico C Pereira
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal.
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12
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Barbosa J, Faria J, Garcez F, Leal S, Afonso LP, Nascimento AV, Moreira R, Pereira FC, Queirós O, Carvalho F, Dinis-Oliveira RJ. Repeated Administration of Clinically Relevant Doses of the Prescription Opioids Tramadol and Tapentadol Causes Lung, Cardiac, and Brain Toxicity in Wistar Rats. Pharmaceuticals (Basel) 2021; 14:ph14020097. [PMID: 33513867 PMCID: PMC7912343 DOI: 10.3390/ph14020097] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 01/19/2021] [Accepted: 01/23/2021] [Indexed: 12/18/2022] Open
Abstract
Tramadol and tapentadol, two structurally related synthetic opioid analgesics, are widely prescribed due to the enhanced therapeutic profiles resulting from the synergistic combination between μ-opioid receptor (MOR) activation and monoamine reuptake inhibition. However, the number of adverse reactions has been growing along with their increasing use and misuse. The potential toxicological mechanisms for these drugs are not completely understood, especially for tapentadol, owing to its shorter market history. Therefore, in the present study, we aimed to comparatively assess the putative lung, cardiac, and brain cortex toxicological damage elicited by the repeated exposure to therapeutic doses of both prescription opioids. To this purpose, male Wistar rats were intraperitoneally injected with single daily doses of 10, 25, and 50 mg/kg tramadol or tapentadol, corresponding to a standard analgesic dose, an intermediate dose, and the maximum recommended daily dose, respectively, for 14 consecutive days. Such treatment was found to lead mainly to lipid peroxidation and inflammation in lung and brain cortex tissues, as shown through augmented thiobarbituric acid reactive substances (TBARS), as well as to increased serum inflammation biomarkers, such as C reactive protein (CRP) and tumor necrosis factor-α (TNF-α). Cardiomyocyte integrity was also shown to be affected, since both opioids incremented serum lactate dehydrogenase (LDH) and α-hydroxybutyrate dehydrogenase (α-HBDH) activities, while tapentadol was associated with increased serum creatine kinase muscle brain (CK-MB) isoform activity. In turn, the analysis of metabolic parameters in brain cortex tissue revealed increased lactate concentration upon exposure to both drugs, as well as augmented LDH and creatine kinase (CK) activities following tapentadol treatment. In addition, pneumo- and cardiotoxicity biomarkers were quantified at the gene level, while neurotoxicity biomarkers were quantified both at the gene and protein levels; changes in their expression correlate with the oxidative stress, inflammatory, metabolic, and histopathological changes that were detected. Hematoxylin and eosin (H & E) staining revealed several histopathological alterations, including alveolar collapse and destruction in lung sections, inflammatory infiltrates, altered cardiomyocytes and loss of striation in heart sections, degenerated neurons, and accumulation of glial and microglial cells in brain cortex sections. In turn, Masson's trichrome staining confirmed fibrous tissue deposition in cardiac tissue. Taken as a whole, these results show that the repeated administration of both prescription opioids extends the dose range for which toxicological injury is observed to lower therapeutic doses. They also reinforce previous assumptions that tramadol and tapentadol are not devoid of toxicological risk even at clinical doses.
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Affiliation(s)
- Joana Barbosa
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
- UCIBIO, REQUIMTE—Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal;
- Department of Public Health and Forensic Sciences, and Medical Education, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Correspondence: (J.B.); (R.J.D.-O.); Tel.: +351-224-157-216 (J.B.); +351-224-157-216 (R.J.D.-O.)
| | - Juliana Faria
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
- UCIBIO, REQUIMTE—Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal;
| | - Fernanda Garcez
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
| | - Sandra Leal
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
- Department of Biomedicine, Unit of Anatomy, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- CINTESIS—Center for Health Technology and Services Research, Faculty of Medicine, University of Porto, 4200-450 Porto, Portugal
| | - Luís Pedro Afonso
- Department of Pathology, Portuguese Institute of Oncology of Porto, 4200-072 Porto, Portugal;
| | - Ana Vanessa Nascimento
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
| | - Roxana Moreira
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
| | - Frederico C. Pereira
- Institute of Pharmacology and Experimental Therapeutics/iCBR, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal;
| | - Odília Queirós
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
| | - Félix Carvalho
- UCIBIO, REQUIMTE—Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal;
| | - Ricardo Jorge Dinis-Oliveira
- IINFACTS—Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, 4585-116 Gandra, Portugal; (J.F.); (F.G.); (S.L.); (A.V.N.); (R.M.); (O.Q.)
- UCIBIO, REQUIMTE—Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal;
- Department of Public Health and Forensic Sciences, and Medical Education, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- Correspondence: (J.B.); (R.J.D.-O.); Tel.: +351-224-157-216 (J.B.); +351-224-157-216 (R.J.D.-O.)
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Nicolucci C, Pais ML, Santos AC, Ribeiro FM, Encarnação PMCC, Silva ALM, Castro IF, Correia PMM, Veloso JFCA, Reis J, Lopes MZ, Botelho MF, Pereira FC, Priolli DG. Single Low Dose of Cocaine-Structural Brain Injury Without Metabolic and Behavioral Changes. Front Neurosci 2021; 14:589897. [PMID: 33584173 PMCID: PMC7874143 DOI: 10.3389/fnins.2020.589897] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 12/15/2020] [Indexed: 11/13/2022] Open
Abstract
Chronic cocaine use has been shown to lead to neurotoxicity in rodents and humans, being associated with high morbidity and mortality rates. However, recreational use, which may lead to addictive behavior, is often neglected. This occurs, in part, due to the belief that exposure to low doses of cocaine comes with no brain damage risk. Cocaine addicts have shown glucose metabolism changes related to dopamine brain activity and reduced volume of striatal gray matter. This work aims to evaluate the morphological brain changes underlying metabolic and locomotor behavioral outcome, in response to a single low dose of cocaine in a pre-clinical study. In this context, a Balb-c mouse model has been chosen, and animals were injected with a single dose of cocaine (0.5 mg/kg). Control animals were injected with saline. A behavioral test, positron emission tomography (PET) imaging, and anatomopathological studies were conducted with this low dose of cocaine, to study functional, metabolic, and morphological brain changes, respectively. Animals exposed to this cocaine dose showed similar open field activity and brain metabolic activity as compared with controls. However, histological analysis showed alterations in the prefrontal cortex and hippocampus of mice exposed to cocaine. For the first time, it has been demonstrated that a single low dose of cocaine, which can cause no locomotor behavioral and brain metabolic changes, can induce structural damage. These brain changes must always be considered regardless of the dosage used. It is essential to alert the population even against the consumption of low doses of cocaine.
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Affiliation(s)
- Camilla Nicolucci
- Multidisciplinary Research Laboratory, São Francisco University Post-graduation Stricto Sensu Programme, Bragança Paulista, Brazil
| | - Mariana Lapo Pais
- Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, Institute of Biophysics, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, Coimbra, Portugal
| | - A C Santos
- Faculty of Medicine, Institute of Biophysics, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology, Coimbra, Portugal
| | - Fabiana M Ribeiro
- Department of Physics, Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), University of Aveiro, Aveiro, Portugal
| | - Pedro M C C Encarnação
- Department of Physics, Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), University of Aveiro, Aveiro, Portugal
| | - Ana L M Silva
- Department of Physics, Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), University of Aveiro, Aveiro, Portugal.,Radiation Imaging Technologies Lda, Ílhavo, Portugal
| | - I F Castro
- Radiation Imaging Technologies Lda, Ílhavo, Portugal
| | - Pedro M M Correia
- Department of Physics, Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), University of Aveiro, Aveiro, Portugal.,Radiation Imaging Technologies Lda, Ílhavo, Portugal
| | - João F C A Veloso
- Department of Physics, Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N), University of Aveiro, Aveiro, Portugal
| | - Julie Reis
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, Coimbra, Portugal
| | - Marina Z Lopes
- Multidisciplinary Research Laboratory, São Francisco University Scientific Initiation Programme, Bragança Paulista, Brazil
| | - Maria F Botelho
- Faculty of Medicine, Institute of Biophysics, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology, Coimbra, Portugal.,Faculty of Medicine, Institute of Pharmacology and Experimental Therapeutics, University of Coimbra, Coimbra, Portugal
| | - Denise G Priolli
- Multidisciplinary Research Laboratory, São Francisco University Post-graduation Stricto Sensu Programme, Bragança Paulista, Brazil
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14
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Soares E, Reis J, Rodrigues M, Ribeiro CF, Pereira FC. Circulating Extracellular Vesicles: The Missing Link between Physical Exercise and Depression Management? Int J Mol Sci 2021; 22:ijms22020542. [PMID: 33430399 PMCID: PMC7827999 DOI: 10.3390/ijms22020542] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 12/15/2022] Open
Abstract
Depression is associated with an increased risk of aging-related diseases. It is also seemingly a common psychological reaction to pandemic outbreaks with forced quarantines and lockdowns. Thus, depression represents, now more than ever, a major global health burden with therapeutic management challenges. Clinical data highlights that physical exercise is gaining momentum as a non-pharmacological intervention in depressive disorders. Although it may contribute to the reduction of systemic inflammation associated with depression, the mechanisms underlying the beneficial physical exercise effects in emotional behavior remain to be elucidated. Current investigations indicate that a rapid release of extracellular vesicles into the circulation might be the signaling mediators of systemic adaptations to physical exercise. These biological entities are now well-established intercellular communicators, playing a major role in relevant physiological and pathophysiological functions, including brain cell-cell communication. We also reviewed emerging evidence correlating depression with modified circulating extracellular vesicle surfaces and cargo signatures (e.g., microRNAs and proteins), envisioned as potential biomarkers for diagnosis, efficient disease stratification and appropriate therapeutic management. Accordingly, the clinical data summarized in the present review prompted us to hypothesize that physical exercise-related circulating extracellular vesicles contribute to its antidepressant effects, particularly through the modulation of inflammation. This review sheds light on the triad "physical exercise-extracellular vesicles-depression" and suggests new avenues in this novel emerging field.
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Affiliation(s)
- Edna Soares
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.R.); (M.R.); (C.F.R.)
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
- Correspondence: (E.S.); (F.C.P.)
| | - Julie Reis
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.R.); (M.R.); (C.F.R.)
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
| | - Mariana Rodrigues
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.R.); (M.R.); (C.F.R.)
| | - Carlos Fontes Ribeiro
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.R.); (M.R.); (C.F.R.)
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
| | - Frederico C. Pereira
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (J.R.); (M.R.); (C.F.R.)
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
- Correspondence: (E.S.); (F.C.P.)
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Abstract
Introduction: Drug use related deaths are increasing and the lack of effective treatment for psychostimulants can be largely held responsible. Particularly, no pharmacotherapy is approved for methamphetamine (METH) use disorder despite decades of research. Only psychosocial interventions are clinically used, with limited long-term recovery and relapse.Areas covered: This review aims to select and describe the most relevant findings to date. Selected clinical trials were found in PubMed using the following keywords ('methamphetamine') and ('addiction' OR 'withdrawal' OR 'treatment' OR 'pharmacotherapy'). Randomized placebo-controlled trials enrolling treatment-seeking METH-dependent subjects and inherent secondary analysis were included.Expert opinion: Overall, end-of-treatment abstinence, reduced METH use or lower relapse rates were seen on METH dependent subgroups or attained significance only following post hoc analysis, irrespective of the medication tested. For example, light and heavy METH users seem to respond differently to pharmacotherapy. This together with the heterogeneous nature of the METH dependent population strongly suggests that some drugs herein described (e.g. mirtazapine, methylphenidate) should be further tested in clinical trials focused on subgroups. Lastly, objective measures, such as urinalysis, are mandatory to include in clinical trials and early treatment response and/or medication compliance should be carefully monitored and considered as predictors of success/failure.
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Affiliation(s)
- Edna Soares
- Institute of Pharmacology and Experimental Therapeutics/iCBR, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Neuroscience, Vision and Brain Diseases, CNC.IBILI-University of Coimbra, Coimbra, Portugal.,Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- Institute of Pharmacology and Experimental Therapeutics/iCBR, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Neuroscience, Vision and Brain Diseases, CNC.IBILI-University of Coimbra, Coimbra, Portugal.,Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal
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C Pereira F. Heartfelt exercise: Physical exercise gets the cardiovascular system into shape. Rev Port Cardiol 2019; 38:347-348. [PMID: 31227294 DOI: 10.1016/j.repc.2019.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Frederico C Pereira
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI-University of Coimbra, Coimbra, Portugal.
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C. Pereira F. Heartfelt exercise: Physical exercise gets the cardiovascular system into shape. Revista Portuguesa de Cardiologia (English Edition) 2019. [DOI: 10.1016/j.repce.2019.06.003] [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] [Indexed: 10/26/2022] Open
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18
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Ferreiro E, Pita IR, Mota SI, Valero J, Ferreira NR, Fernandes T, Calabrese V, Fontes-Ribeiro CA, Pereira FC, Rego AC. Coriolus versicolor biomass increases dendritic arborization of newly-generated neurons in mouse hippocampal dentate gyrus. Oncotarget 2018; 9:32929-32942. [PMID: 30250640 PMCID: PMC6152478 DOI: 10.18632/oncotarget.25978] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 07/31/2018] [Indexed: 12/11/2022] Open
Abstract
Brain cognitive reserve refers to the ability of the brain to manage different challenges that arise throughout life, making it resilient to neuropathology. Hippocampal adult neurogenesis has been considered to be a relevant contributor for brain cognitive reserve and brain plasticity. Coriolus versicolor (CV), a common healthful mushroom, has been receiving increasing attention by its antitumoral, anti-inflammatory, antioxidant, antibacterial, and immunomodulatory properties, including in the hippocampus. Herein, we evaluated whether CV biomass oral administration for 2.5 months enhances hippocampal neurogenic reserve under normal/physiological conditions, by quantifying hippocampal dentate gyrus (DG) granular cell layer (GCL) and subgranular zone (SGZ) volumes, proliferation, number and dendritic complexity features of hippocampal newly-generated neurons. We also analyzed β-catenin levels in DG newly-generated immature neurons, because it plays a major role in neurogenesis. Although no differences were observed in the volume of GCL and SGZ layers, in proliferation and in the number of newly-generated neurons of controls and CV-administered mice, we found that CV administration promotes a significant increase in dendritic length and branching and total dendritic volume of immature neurons, suggesting a positive effect of oral CV administration in the hippocampal neurogenic reserve. We also observed that β-catenin levels are increased both in the nucleus and cytoplasm of DG immature neurons, suggesting that Wnt/β-catenin signalling may play an important role in the CV positive effect on the differentiation of these cells. These data unveil a so far unexplored neurogenic potential of CV supplementation, which emerges as a possible preventive strategy for different neurological conditions.
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Affiliation(s)
- Elisabete Ferreiro
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- III-Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Coimbra, Portugal
- CNC.IBILI–University of Coimbra, Coimbra, Portugal
| | - Inês R. Pita
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI–University of Coimbra, Coimbra, Portugal
| | - Sandra I. Mota
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- III-Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Coimbra, Portugal
- CNC.IBILI–University of Coimbra, Coimbra, Portugal
| | - Jorge Valero
- Achucarro Basque Center for Neuroscience, Science Park of the University of the Basque Country (UPV/EHU), Leioa, Spain
- Ikerbasque Basque Foundation for Science, Bilbao, Bizkaia, Spain
| | | | - Tito Fernandes
- Ministry of Education, Maputo, Mozambique
- Faculty of Veterinary Medicine, Lisbon University, Lisbon, Portugal
| | - Vittorio Calabrese
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - Carlos A. Fontes-Ribeiro
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI–University of Coimbra, Coimbra, Portugal
| | - Frederico C. Pereira
- Institute of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI–University of Coimbra, Coimbra, Portugal
| | - Ana Cristina Rego
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- CNC.IBILI–University of Coimbra, Coimbra, Portugal
- Institute of Biochemistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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19
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Alves MRP, Boia R, Campos EJ, Martins J, Nunes S, Madeira MH, Santiago AR, Pereira FC, Reis F, Ambrósio AF, Baptista FI. Subtle thinning of retinal layers without overt vascular and inflammatory alterations in a rat model of prediabetes. Mol Vis 2018; 24:353-366. [PMID: 29853770 PMCID: PMC5957544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 05/16/2018] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Diabetic retinopathy is a neurovascular disease characterized by increased permeability of the blood-retinal barrier, changes in the neural components of the retina, and low-grade chronic inflammation. Diabetic retinopathy is a major complication of diabetes; however, the impact of a prediabetic state on the retina remains to be elucidated. The aim of this study was to assess possible early retinal changes in prediabetic rats, by evaluating changes in the integrity of the blood-retinal barrier, the retinal structure, neural markers, and inflammatory mediators. METHODS Several parameters were analyzed in the retinas of Wistar rats that drank high sucrose (HSu; 35% sucrose solution during 9 weeks, the prediabetic animal model) and were compared with those of age-matched controls. The permeability of the blood-retinal barrier was assessed with the Evans blue assay, and the content of the tight junction proteins and neural markers with western blotting. Optical coherence tomography was used to evaluate retinal thickness. Cell loss at the ganglion cell layer was assessed with terminal deoxynucleotidyl transferase (TdT) dUTP nick-end labeling (TUNEL) assay and by evaluating the immunoreactivity of the Brn3a transcription factor. To assess retinal neuroinflammation, the mRNA expression and protein levels of inducible nitric oxide synthase isoform (iNOS), interleukin-1 beta (IL-1β), and tumor necrosis factor (TNF) were evaluated. Iba1 and MHC-II immunoreactivity and translocator protein (TSPO) mRNA levels were assessed to study the microglial number and activation state. RESULTS The thickness of the inner retinal layers of the HSu-treated animals decreased. Nevertheless, no apoptotic cells were observed, and no changes in retinal neural markers were detected in the retinas of the HSu-treated animals. No changes were detected in the permeability of the blood-retinal barrier, as well as the tight junction protein content between the HSu-treated rats and the controls. In addition, the inflammatory parameters remained unchanged in the retina despite the tendency for an increase in the number of retinal microglial cells. CONCLUSIONS In a prediabetic rat model, the retinal structure is affected by the thinning of the inner layers, without overt vascular and inflammatory alterations. The results suggest neuronal dysfunction (thinning of the inner retina) that may precede or anticipate the vascular and inflammatory changes. Subtle structural changes might be viewed as early disturbances in an evolving disease, suggesting that preventive strategies (such as the modification of diet habits) could be applied at this stage, before the progression toward irreversible dysfunction and damage to the retina.
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Affiliation(s)
- Mariana R. P. Alves
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - Raquel Boia
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - Elisa J. Campos
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - João Martins
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - Sara Nunes
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - Maria H. Madeira
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - Ana Raquel Santiago
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal,Association for Innovation and Biomedical Research on Light (AIBILI), Coimbra, Portugal
| | - Frederico C. Pereira
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - Flávio Reis
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
| | - António F. Ambrósio
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal,Association for Innovation and Biomedical Research on Light (AIBILI), Coimbra, Portugal
| | - Filipa I. Baptista
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, Coimbra, Portugal,CNC.IBILI Consortium, University of Coimbra, Coimbra, Portugal
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20
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Tenreiro Pinto J, Pereira FC, Loureiro MC, Gama R, Fernandes HL. Efficacy Analysis of Capsaicin 8% Patch in Neuropathic Peripheral Pain Treatment. Pharmacology 2018; 101:290-297. [PMID: 29587275 DOI: 10.1159/000487444] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 11/28/2017] [Accepted: 01/30/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS Several guidelines for neuropathic pain management and various effective drugs are available; however, neuropathic pain remains undertreated. This retrospective study aimed to evaluate the efficacy of topical capsaicin 8% in peripheral neuropathic pain in a routine clinical setting. METHODS Therapeutic efficacy was evaluated through pain intensity, using numerical pain rating scale at baseline and 7-14 days after each treatment, and using pain treatment area (PTA) assessed immediately before each treatment. RESULTS A total of 43 patients with either post-herpetic neuralgia or post-traumatic/post-surgical neuropathic pain were enrolled. The median percentage reduction in numerical pain rating scale score and in PTA was -40.0 (-50.0 to -33.3; 95% CI, bootstrap) and -35.1 (-50.9 to 3.4; 95% CI, bootstrap), respectively. Pain intensity and PTA were equally improved and reduced in both treated conditions. CONCLUSION This study suggests that topical capsaicin 8% reduces peripheral neuropathic pain as well as treatment pain area.
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Affiliation(s)
| | - Frederico C Pereira
- Laboratory of Pharmacology and Experimental Therapeutics/Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, Coimbra, Portugal
| | - Maria C Loureiro
- Department of Anesthesiology, Centro Hospitalar Tondela, Viseu, Portugal
| | - Ricardo Gama
- School of Technology and Management of Lamego, Polytechnic Institute of Viseu, Viseu, Portugal
| | - Hugo L Fernandes
- Department of Physical Medicine and Rehabilitation, Northwestern University, Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, Illinois, USA
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21
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Rego Â, Viana SD, Ribeiro CAF, Rodrigues-Santos P, Pereira FC. Monophosphoryl Lipid-A: A Promising Tool for Alzheimer's Disease Toll. J Alzheimers Dis 2017; 52:1189-202. [PMID: 27079716 DOI: 10.3233/jad-151183] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 12/13/2022]
Abstract
Neuroinflammation is a two-edged sword in Alzheimer's disease (AD). A certain degree of neuroinflammation is instrumental in the clearance of amyloid-β (Aβ) peptides by activated microglia, although a sustained neuroinflammation might accelerate Aβ deposition, thus fostering the neurodegenerative process and functional decline in AD. There is an increasing body of evidence suggesting that the innate immune system via Toll-like receptor 4 (TLR4) finely orchestrates the highly regulated inflammatory cascade that takes place in AD pathology. Herein we critically review pre-clinical (in vitro and in vivo approaches) and clinical studies showing that monophosphoryl lipid A (MPL), a partial TLR4 agonist, may have beneficial effect on AD physiopathology. The in vivo data elegantly showed that MPL enhanced Aβ plaque phagocytosis thus decreasing the number and the size of Aβ deposits and soluble Aβ in brain from APPswe/PS1 mice. Furthermore, MPL also improved their cognition. The mechanism underlying this MPL effect was proposed to be microglial activation by recruiting TLR4. Additionally, it was demonstrated that MPL increased the Aβ antibody titer and showed a safe profile in mice and primates, when used as a vaccine adjuvant. Clinical studies using MPL as an adjuvant in Aβ immunotherapy are currently ongoing. Overall, we argue that the TLR4 partial agonist MPL is a potentially safe and effective new pharmacological tool in AD.
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Affiliation(s)
- Ângela Rego
- Laboratório de Farmacologia e Terapêutica Experimental/IBILI, Faculdade de Medicina da Universidade de Coimbra, Portugal.,CNC.IBILI - Universidade de Coimbra, Coimbra, Portugal.,Centro Hospitalar do Porto, Largo Prof. Abel Salazar, Porto, Portugal
| | - Sofia D Viana
- Laboratório de Farmacologia e Terapêutica Experimental/IBILI, Faculdade de Medicina da Universidade de Coimbra, Portugal.,CNC.IBILI - Universidade de Coimbra, Coimbra, Portugal.,Instituto Politécnico de Coimbra, ESTESC-Coimbra Health School, Farmácia, Portugal
| | - Carlos A Fontes Ribeiro
- Laboratório de Farmacologia e Terapêutica Experimental/IBILI, Faculdade de Medicina da Universidade de Coimbra, Portugal.,CNC.IBILI - Universidade de Coimbra, Coimbra, Portugal
| | - Paulo Rodrigues-Santos
- Instituto de Imunologia, Faculdade de Medicina da Universidade de Coimbra, Portugal.,Laboratório de Imunologia e Oncologia, Centro de Neurociências e Biologia Celular, Universidade de Coimbra, Portugal
| | - Frederico C Pereira
- Laboratório de Farmacologia e Terapêutica Experimental/IBILI, Faculdade de Medicina da Universidade de Coimbra, Portugal.,CNC.IBILI - Universidade de Coimbra, Coimbra, Portugal
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22
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Burgeiro A, Cerqueira MG, Varela-Rodríguez BM, Nunes S, Neto P, Pereira FC, Reis F, Carvalho E. Glucose and Lipid Dysmetabolism in a Rat Model of Prediabetes Induced by a High-Sucrose Diet. Nutrients 2017. [PMID: 28635632 PMCID: PMC5490617 DOI: 10.3390/nu9060638] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Glucotoxicity and lipotoxicity are key features of type 2 diabetes mellitus, but their molecular nature during the early stages of the disease remains to be elucidated. We aimed to characterize glucose and lipid metabolism in insulin-target organs (liver, skeletal muscle, and white adipose tissue) in a rat model treated with a high-sucrose (HSu) diet. Two groups of 16-week-old male Wistar rats underwent a 9-week protocol: HSu diet (n = 10)-received 35% of sucrose in drinking water; Control (n = 12)-received vehicle (water). Body weight, food, and beverage consumption were monitored and glucose, insulin, and lipid profiles were measured. Serum and liver triglyceride concentrations, as well as the expression of genes and proteins involved in lipid biosynthesis were assessed. The insulin-stimulated glucose uptake and isoproterenol-stimulated lipolysis were also measured in freshly isolated adipocytes. Even in the absence of obesity, this rat model already presented the main features of prediabetes, with fasting normoglycemia but reduced glucose tolerance, postprandial hyperglycemia, compensatory hyperinsulinemia, as well as decreased insulin sensitivity (resistance) and hypertriglyceridemia. In addition, impaired hepatic function, including altered gluconeogenic and lipogenic pathways, as well as increased expression of acetyl-coenzyme A carboxylase 1 and fatty acid synthase in the liver, were observed, suggesting that liver glucose and lipid dysmetabolism may play a major role at this stage of the disease.
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Affiliation(s)
- Ana Burgeiro
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - Manuela G Cerqueira
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - Bárbara M Varela-Rodríguez
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - Sara Nunes
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Paula Neto
- Service of Anatomical Pathology, Coimbra University Hospital Centre (CHUC), 3000-075 Coimbra, Portugal.
| | - Frederico C Pereira
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Flávio Reis
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Eugénia Carvalho
- Center of Neuroscience and Cell Biology (CNC) and CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal.
- The Portuguese Diabetes Association (APDP), 1250-203 Lisbon, Portugal.
- Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA.
- Arkansas Children's Hospital Research Institute, Little Rock, AR 72202, USA.
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23
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Viana SD, Pita IR, Lemos C, Rial D, Couceiro P, Rodrigues-Santos P, Caramelo F, Carvalho F, Ali SF, Prediger RD, Fontes Ribeiro CA, Pereira FC. The effects of physical exercise on nonmotor symptoms and on neuroimmune RAGE network in experimental parkinsonism. J Appl Physiol (1985) 2017; 123:161-171. [PMID: 28385921 DOI: 10.1152/japplphysiol.01120.2016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 12/23/2016] [Revised: 03/30/2017] [Accepted: 04/02/2017] [Indexed: 12/18/2022] Open
Abstract
Parkinson's disease (PD) prodromal stages comprise neuropsychiatric perturbations that critically compromise a patient's quality of life. These nonmotor symptoms (NMS) are associated with exacerbated innate immunity, a hallmark of overt PD. Physical exercise (PE) has the potential to improve neuropsychiatric deficits and to modulate immune network including receptor for advanced glycation end products (RAGE) and Toll-like receptors (TLRs) in distinct pathological settings. Accordingly, the present study aimed to test the hypothesis that PE 1) alleviates PD NMS and 2) modulates neuroimmune RAGE network in experimental PD. Adult Wistar rats subjected to long-term mild treadmill were administered intranasally with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and probed for PD NMS before the onset of motor abnormalities. Twelve days after MPTP, neuroimmune RAGE network transcriptomics (real-time quantitative PCR) was analyzed in frontal cortex, hippocampus, and striatum. Untrained MPTP animals displayed habit-learning and motivational deficits without gross motor impairments (cued version of water-maze, splash, and open-field tests, respectively). A suppression of RAGE and neuroimmune-related genes was observed in frontal cortex on chemical and physical stressors (untrained MPTP: RAGE, TLR5 and -7, and p22 NADPH oxidase; saline-trained animals: RAGE, TLR1 and -5 to -11, TNF-α, IL-1β, and p22 NADPH oxidase), suggesting the recruitment of compensatory mechanisms to restrain innate inflammation. Notably, trained MPTP animals displayed normal cognitive/motivational performances. Additionally, these animals showed normal RAGE expression and neuroprotective PD-related DJ-1 gene upregulation in frontal cortex when compared with untrained MPTP animals. These findings corroborate PE efficacy in improving PD NMS and newly identify RAGE network as a neural substrate for exercise intervention. Additional research is warranted to unveil functional consequences of PE-induced modulation of RAGE/DJ-1 transcriptomics in PD premotor stages.NEW & NOTEWORTHY This study newly shows that physical exercise (PE) corrects nonmotor symptoms of the intranasal 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) model of experimental parkinsonism. Additionally, we show that suppression of neuroimmune receptor for advanced glycation end products (RAGE) network occurs in frontal cortex on chemical (MPTP) and physical (PE) interventions. Finally, PE normalizes frontal cortical RAGE transcriptomics and upregulates the neuroprotective DJ-1 gene in the intranasal MPTP model of experimental parkinsonism.
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Affiliation(s)
- Sofia D Viana
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology-Institute for Biomedical Imaging and Life Sciences, University of Coimbra, Coimbra, Portugal.,Polytechnic Institute of Coimbra, Escola Superior de Tecnologia da Saúde de Coimbra-Coimbra Health School, Pharmacy, Coimbra, Portugal
| | - Inês R Pita
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology-Institute for Biomedical Imaging and Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Cristina Lemos
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Daniel Rial
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Patrícia Couceiro
- Immunology and Oncology Laboratory, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Paulo Rodrigues-Santos
- Immunology and Oncology Laboratory, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Institute of Immunology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center of Investigation in Environment, Genetics and Oncobiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Francisco Caramelo
- Laboratory of Biostatistics and Medical Informatics, Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Félix Carvalho
- Research Unit on Applied Molecular Biosciences, Rede de Química e Tecnologia, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal; and
| | - Syed F Ali
- Neurochemistry Laboratory, Division of Neurotoxicology, National Center of Toxicological Research, Food and Drug Administration, Jefferson, Arkansas
| | - Rui D Prediger
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Carlos A Fontes Ribeiro
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology-Institute for Biomedical Imaging and Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- Laboratory of Pharmacology and Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; .,Center for Neuroscience and Cell Biology-Institute for Biomedical Imaging and Life Sciences, University of Coimbra, Coimbra, Portugal
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24
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Esteves AR, Arduíno DM, Silva DF, Viana SD, Pereira FC, Cardoso SM. Mitochondrial Metabolism Regulates Microtubule Acetylome and Autophagy Trough Sirtuin-2: Impact for Parkinson’s Disease. Mol Neurobiol 2017; 55:1440-1462. [DOI: 10.1007/s12035-017-0420-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/24/2017] [Indexed: 10/20/2022]
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25
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Feio-Azevedo R, Costa VM, Ferreira LM, Branco PS, Pereira FC, Bastos ML, Carvalho F, Capela JP. Toxicity of the amphetamine metabolites 4-hydroxyamphetamine and 4-hydroxynorephedrine in human dopaminergic differentiated SH-SY5Y cells. Toxicol Lett 2017; 269:65-76. [PMID: 28115274 DOI: 10.1016/j.toxlet.2017.01.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 08/01/2016] [Revised: 01/14/2017] [Accepted: 01/17/2017] [Indexed: 12/21/2022]
Abstract
Amphetamine (AMPH) is a psychostimulant used worldwide by millions of patients in the clinical treatment of attention deficit hyperactivity disorder, narcolepsy or even obesity, and is also a drug of abuse. 4-Hydroxynorephedrine (4-OHNE) and 4-hydroxyamphetamine (4-OHAMPH) are two major metabolites known to persist in the brain longer than AMPH. The contribution of AMPH metabolites for its neurotoxicity is undetermined. We evaluated the toxicity of AMPH and its metabolites 4-OHNE and 4-OHAMPH, obtained by chemical synthesis, in human dopaminergic differentiated SH-SY5Y neurons. Cells were exposed to AMPH (concentration range 0-5mM) or 4-OHAMPH or 4-OHNE (concentration range 0-10mM) for 24 or 48h, and the viability was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) and lactate dehydrogenase (LDH) leakage assays. Results showed that for both AMPH and the metabolites a concentration-dependent toxicity was observed. The toxic concentration 50% (TC50) for AMPH and 4-OHNE following 24h exposure was circa 3.5mM and 8mM, respectively. For 4-OHAMPH the TC50 was not reached in the tested concentration range. N-acetyl cysteine, cycloheximide, l-carnitine, and methylphenidate were able to reduce cell death induced by AMPH TC50. Acridine orange/ethidium bromide staining showed evident signs of late apoptotic cells and necrotic cells following 24h exposure to AMPH 3.50mM. The 4-OHAMPH metabolite at 8.00mM originated few late apoptotic cells, whereas 4-OHNE at 8.00mM resulted in late apoptotic cells and necrotic cells, in a scenario similar to AMPH. In conclusion, the AMPH metabolite 4-OHNE is more toxic than 4-OHAMPH, nonetheless both are less toxic than the parent compound in vitro. The most toxic metabolite 4-OHNE has longer permanence in the brain, rendering likely its contribution for AMPH neurotoxicity.
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Affiliation(s)
- R Feio-Azevedo
- UCIBIO/REQUIMTE (Rede de Química e Tecnologia), Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Portugal.
| | - V M Costa
- UCIBIO/REQUIMTE (Rede de Química e Tecnologia), Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Portugal
| | - L M Ferreira
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, Portugal
| | - P S Branco
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, Portugal
| | - F C Pereira
- Instituto de Farmacologia e Terapêutica Experimental/Instituto de Imagem Biomédica e Ciências da Vida (IBILI), Faculdade de Medicina, Universidade de Coimbra, Portugal
| | - M L Bastos
- UCIBIO/REQUIMTE (Rede de Química e Tecnologia), Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Portugal
| | - F Carvalho
- UCIBIO/REQUIMTE (Rede de Química e Tecnologia), Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Portugal
| | - J P Capela
- UCIBIO/REQUIMTE (Rede de Química e Tecnologia), Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Portugal; FP-ENAS (Unidade de Investigação UFP em Energia, Ambiente e Saúde), CEBIMED (Centro de Estudos em Biomedicina), Faculdade de Ciências da Saúde, Universidade Fernando Pessoa, Portugal.
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26
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Rial D, Morató X, Real JI, Gonçalves FQ, Stagljar I, Pereira FC, Fernández-Dueñas V, Cunha RA, Ciruela F. Parkinson's disease-associated GPR37 receptor regulates cocaine-mediated synaptic depression in corticostriatal synapses. Neurosci Lett 2016; 638:162-166. [PMID: 28007645 DOI: 10.1016/j.neulet.2016.12.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 11/02/2016] [Revised: 12/11/2016] [Accepted: 12/13/2016] [Indexed: 11/15/2022]
Abstract
GPR37 is an orphan G protein-coupled receptor highly expressed in the brain. The precise function of GPR37 is still unknown, but a number of evidences indicate it modulates the dopaminergic system. Here, we aimed to determine the role of GPR37 on the control of cocaine-mediated electrophysiological effects (synaptic transmission and short-term plasticity) in corticostriatal synapses. Accordingly, we evaluated basal synaptic transmission and paired-pulse stimulation (PPS) in wild-type and GPR37KO mice slices. Regardless of the genotype, a low concentration of cocaine (2μM) did not modify basal synaptic transmission. Conversely, a higher dose of cocaine (30μM) decreased synaptic transmission in both genotypes, although with different intensities: approximately 30% in slices from wild-type mice and 45% in slices from GPR37-KO mice. On the other hand, no differences in PPS ratio were observed between wild-type and GPR37-KO cocaine-treated mice. Overall, our data suggest that GPR37 is involved in cocaine-induced modification of basal synaptic transmission without modifying cocaine effects in short-term plasticity.
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Affiliation(s)
- Daniel Rial
- CNC-Center for Neurosciences and Cell Biology and Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Xavier Morató
- Unitat de Farmacologia, Departament Patologia i Terapèutica Experimental, Facultat de Medicina, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Spain; Institut de Neurosciències, Universitat de Barcelona, Barcelona, Spain
| | - Joana I Real
- CNC-Center for Neurosciences and Cell Biology and Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Francisco Q Gonçalves
- CNC-Center for Neurosciences and Cell Biology and Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Igor Stagljar
- Department of Biochemistry and Department of Molecular Genetics, Donnelly Centre, University of Toronto, Toronto, Ontario, M5S 3E1, Canada, Canada
| | | | - Víctor Fernández-Dueñas
- Unitat de Farmacologia, Departament Patologia i Terapèutica Experimental, Facultat de Medicina, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Spain; Institut de Neurosciències, Universitat de Barcelona, Barcelona, Spain
| | - Rodrigo A Cunha
- CNC-Center for Neurosciences and Cell Biology and Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Faculty of Medicine, University of Coimbra, Portugal
| | - Francisco Ciruela
- Unitat de Farmacologia, Departament Patologia i Terapèutica Experimental, Facultat de Medicina, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Spain; Institut de Neurosciències, Universitat de Barcelona, Barcelona, Spain.
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27
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Fonseca R, Carvalho RA, Lemos C, Sequeira AC, Pita IR, Carvalho F, Silva CD, Prediger RDS, Jarak I, Cunha RA, Fontes Ribeiro CA, Köfalvi A, Pereira FC. Methamphetamine Induces Anhedonic-Like Behavior and Impairs Frontal Cortical Energetics in Mice. CNS Neurosci Ther 2016; 23:119-126. [PMID: 27762079 DOI: 10.1111/cns.12649] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 01/14/2016] [Revised: 09/06/2016] [Accepted: 09/07/2016] [Indexed: 01/18/2023] Open
Abstract
INTRODUCTION We recently showed that a single high dose of methamphetamine (METH) induces a persistent frontal cortical monoamine depletion that is accompanied by helpless-like behavior in mice. However, brain metabolic alterations underlying both neurochemical and mood alterations remain unknown. AIMS Herein, we aimed at characterizing frontal cortical metabolic alterations associated with early negative mood behavior triggered by METH. Adult C57BL/6 mice were injected with METH (30 mg/kg, i.p.), and their frontal cortical metabolic status was characterized after probing their mood and anxiety-related phenotypes 3 days postinjection. RESULTS Methamphetamine induced depressive-like behavior, as indicated by the decreased grooming time in the splash test and by a transient decrease in sucrose preference. At this time, METH did not alter anxiety-like behavior or motor functions. Depolarization-induced glucose uptake was reduced in frontocortical slices from METH-treated mice compared to controls. Consistently, astrocytic glucose transporter (GluT1) density was lower in the METH group. A proton high rotation magic angle spinning (HRMAS) spectroscopic approach revealed that METH induced a significant decrease in N-acetyl aspartate (NAA) and glutamate levels, suggesting that METH decreased neuronal glutamatergic function in frontal cortex. CONCLUSIONS We report, for the first time, that a single METH injection triggers early self-care and hedonic deficits and impairs frontal cortical energetics in mice.
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Affiliation(s)
- Raquel Fonseca
- Laboratory of Pharmacology and Experimental Therapeutics/Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Rui A Carvalho
- CNC.IBILI, University of Coimbra, Coimbra, Portugal.,CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal
| | - Cristina Lemos
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Ana C Sequeira
- Laboratory of Pharmacology and Experimental Therapeutics/Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Inês R Pita
- Laboratory of Pharmacology and Experimental Therapeutics/Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Fábio Carvalho
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Carlos D Silva
- Laboratory of Pharmacology and Experimental Therapeutics/Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Rui D S Prediger
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, UFSC, Florianópolis, Brazil
| | - Ivana Jarak
- CNC.IBILI, University of Coimbra, Coimbra, Portugal.,CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Rodrigo A Cunha
- CNC.IBILI, University of Coimbra, Coimbra, Portugal.,CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Carlos A Fontes Ribeiro
- Laboratory of Pharmacology and Experimental Therapeutics/Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI, University of Coimbra, Coimbra, Portugal
| | - Attila Köfalvi
- CNC.IBILI, University of Coimbra, Coimbra, Portugal.,CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- Laboratory of Pharmacology and Experimental Therapeutics/Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI, University of Coimbra, Coimbra, Portugal
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Viana SD, Valero J, Rodrigues-Santos P, Couceiro P, Silva AM, Carvalho F, Ali SF, Fontes-Ribeiro CA, Pereira FC. Regulation of striatal astrocytic receptor for advanced glycation end-products variants in an early stage of experimental Parkinson's disease. J Neurochem 2016; 138:598-609. [PMID: 27221633 DOI: 10.1111/jnc.13682] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 02/25/2016] [Revised: 05/11/2016] [Accepted: 05/12/2016] [Indexed: 09/01/2023]
Abstract
Convincing evidence indicates that advanced glycation end-products and danger-associated protein S100B play a role in Parkinson's disease (PD). These agents operate through the receptor for advanced glycation end-products (RAGE), which displays distinct isoforms playing protective/deleterious effects. However, the nature of RAGE variants has been overlooked in PD studies. Hence, we attempted to characterize RAGE regulation in early stages of PD striatal pathology. A neurotoxin-based rodent model of PD was used in this study, through administration of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) to C57BL/6 mice. Animals were killed 6 h post-MPTP to assess S100B/RAGE contents (RT-qPCR, ELISA) and RAGE isoform density (WB) and cellular distribution (immunohistochemistry). Dopaminergic and gliotic status were also mapped (HPLC-ED, WB, immunohistochemistry). At this preliminary stage of MPTP-induced PD in mice, RAGE inhibitory isoforms were increased whereas full-length RAGE was not affected. This putative cytoprotective RAGE phenotype paired an inflammatory and pro-oxidant setting fueling DAergic denervation. Increased RAGE inhibitory variants occur in astrocytes showing higher S100B density but no overt signs of hypertrophy or NF-κB activation, a canonical effector of RAGE. These findings expand our understanding of the toxic effect of MPTP on striatum and offer first in vivo evidence of RAGE being a responder in early stages of astrogliosis dynamics, supporting a protective rather tissue-destructive phenotype of RAGE in the initial phase of PD degeneration. These data lay the groundwork for future studies on the relevance of astrocytic RAGE in DAergic neuroprotection strategies. We report increased antagonistic RAGE variants paralleling S100B up-regulation in early stages of MPTP-induced astrogliosis dynamics . We propose that selective RAGE regulation reflects a self-protective mechanism to maintain low levels of RAGE ligands , preventing long-term inflammation and oxidative stress arising from sustained ligands/flRAGE activation . Understanding loss of RAGE protective response to stress may provide new therapeutic options to halt or slow down dopaminergic axonopathy and, ultimately, neuronal death .
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Affiliation(s)
- Sofia D Viana
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI - University of Coimbra, Coimbra, Portugal
- Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy, Coimbra, Portugal
| | - Jorge Valero
- CNC.IBILI - University of Coimbra, Coimbra, Portugal
- Achucarro Basque Center for Neuroscience, Zamudio, Bizkaia, Spain
- Ikerbasque Foundation, Bilbao, Bizkaia, Spain
| | - Paulo Rodrigues-Santos
- Institute of Immunology - Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Immunology and Oncology Laboratory, Center for Neurosciences and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
- Center of Investigation in Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Patrícia Couceiro
- Immunology and Oncology Laboratory, Center for Neurosciences and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
| | - Andréa M Silva
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI - University of Coimbra, Coimbra, Portugal
| | - Félix Carvalho
- UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Syed F Ali
- Neurochemistry Laboratory, Division of Neurotoxicology, National Center of Toxicological Research/Food and Drug Administration, Jefferson, Arkansas, USA
| | - Carlos A Fontes-Ribeiro
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI - University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- CNC.IBILI - University of Coimbra, Coimbra, Portugal
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Viana SD, Fernandes RC, Canas PM, Silva AM, Carvalho F, Ali SF, Fontes Ribeiro CA, Pereira FC. Presymptomatic MPTP Mice Show Neurotrophic S100B/mRAGE Striatal Levels. CNS Neurosci Ther 2016; 22:396-403. [PMID: 26843141 DOI: 10.1111/cns.12508] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 11/04/2015] [Revised: 12/09/2015] [Accepted: 12/09/2015] [Indexed: 11/29/2022] Open
Abstract
AIMS Astrocytic S100B and receptor for advanced glycation endproducts (RAGE) have been implicated in Parkinson׳s disease (PD) pathogenesis through yet unclear mechanisms. This study attempted to characterize S100B/mRAGE (signaling isoform) axis in a dying-back dopaminergic (DAergic) axonopathy setting, which mimics an early event of PD pathology. METHODS C57BL/6 mice were submitted to a chronic MPTP paradigm (20 mg/kg i.p., 2 i.d-12 h apart, 5 days/week for 2 weeks) and euthanized 7 days posttreatment to assess mRAGE cellular distribution and S100B/mRAGE density in striatum, after probing their locomotor activity (pole test and rotarod). Dopaminergic status, oxidative stress, and gliosis were also measured (HPLC-ED, WB, IHC). RESULTS This MPTP regimen triggered increased oxidative stress (augmented HNE levels), gliosis (GS/Iba1-reactive morphology), loss of DAergic fibers (decreased tyrosine hydroxylase levels), and severe hypodopaminergia. Biochemical deficits were not translated into motor abnormalities, mimicking a presymptomatic PD period. Remarkably, striatal neurotrophic S100B/mRAGE levels and major neuronal mRAGE localization coexist with compensatory responses (3-fold increase in DA turnover), which are important to maintain normal motor function. CONCLUSION Our findings rule out the involvement of S100B/mRAGE axis in striatal reactive gliosis, DAergic axonopathy and warrant further exploration of its neurotrophic effects in a presymptomatic compensatory PD stage, which is a fundamental period for successful implementation of therapeutic strategies.
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Affiliation(s)
- Sofia D Viana
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI - University of Coimbra, Coimbra, Portugal.,Instituto Politécnico de Coimbra, ESTESC-Coimbra Health School, Farmácia, Portugal
| | - Rosa C Fernandes
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI - University of Coimbra, Coimbra, Portugal
| | - Paula M Canas
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI - University of Coimbra, Coimbra, Portugal
| | - Andréa M Silva
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI - University of Coimbra, Coimbra, Portugal
| | - Félix Carvalho
- UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Syed F Ali
- Neurochemistry Laboratory, Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR, USA
| | - Carlos A Fontes Ribeiro
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI - University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- Laboratory of Pharmacology and Experimental Therapeutics/IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,CNC.IBILI - University of Coimbra, Coimbra, Portugal
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Matheus FC, Rial D, Real JI, Lemos C, Ben J, Guaita GO, Pita IR, Sequeira AC, Pereira FC, Walz R, Takahashi RN, Bertoglio LJ, Da Cunha C, Cunha RA, Prediger RD. Decreased synaptic plasticity in the medial prefrontal cortex underlies short-term memory deficits in 6-OHDA-lesioned rats. Behav Brain Res 2015; 301:43-54. [PMID: 26707254 DOI: 10.1016/j.bbr.2015.12.011] [Citation(s) in RCA: 21] [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: 09/04/2015] [Revised: 12/05/2015] [Accepted: 12/11/2015] [Indexed: 11/30/2022]
Abstract
Parkinson's disease (PD) is characterized by motor dysfunction associated with dopaminergic degeneration in the dorsolateral striatum (DLS). However, motor symptoms in PD are often preceded by short-term memory deficits, which have been argued to involve deregulation of medial prefrontal cortex (mPFC). We now used a 6-hydroxydopamine (6-OHDA) rat PD model to explore if alterations of synaptic plasticity in DLS and mPFC underlie short-term memory impairments in PD prodrome. The bilateral injection of 6-OHDA (20μg/hemisphere) in the DLS caused a marked loss of dopaminergic neurons in the substantia nigra (>80%) and decreased monoamine levels in the striatum and PFC, accompanied by motor deficits evaluated after 21 days in the open field and accelerated rotarod. A lower dose of 6-OHDA (10μg/hemisphere) only induced a partial degeneration (about 60%) of dopaminergic neurons in the substantia nigra with no gross motor impairments, thus mimicking an early premotor stage of PD. Notably, 6-OHDA (10μg)-lesioned rats displayed decreased monoamine levels in the PFC as well as short-term memory deficits evaluated in the novel object discrimination and in the modified Y-maze tasks; this was accompanied by a selective decrease in the amplitude of long-term potentiation in the mPFC, but not in DLS, without changes of synaptic transmission in either brain regions. These results indicate that the short-term memory dysfunction predating the motor alterations in the 6-OHDA model of PD is associated with selective changes of information processing in PFC circuits, typified by persistent changes of synaptic plasticity.
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Affiliation(s)
- Filipe C Matheus
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis 88049-900, SC, Brazil
| | - Daniel Rial
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis 88049-900, SC, Brazil; CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Joana I Real
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Cristina Lemos
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Juliana Ben
- Centro de Neurociências Aplicadas (CeNAp), Hospital Universitário (HU), Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Gisele O Guaita
- Departamento de Farmacologia, Universidade Federal do Paraná, Curitiba 81531-980, PR, Brazil
| | - Inês R Pita
- Faculty of Medicine, University of Coimbra, 3005-504 Coimbra, Portugal; Departamento de Farmacologia e Terapêuticas Experimentais/IBILI, Universidade de Coimbra, Portugal
| | - Ana C Sequeira
- Faculty of Medicine, University of Coimbra, 3005-504 Coimbra, Portugal; Departamento de Farmacologia e Terapêuticas Experimentais/IBILI, Universidade de Coimbra, Portugal
| | - Frederico C Pereira
- Faculty of Medicine, University of Coimbra, 3005-504 Coimbra, Portugal; Departamento de Farmacologia e Terapêuticas Experimentais/IBILI, Universidade de Coimbra, Portugal
| | - Roger Walz
- Centro de Neurociências Aplicadas (CeNAp), Hospital Universitário (HU), Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Reinaldo N Takahashi
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis 88049-900, SC, Brazil
| | - Leandro J Bertoglio
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis 88049-900, SC, Brazil
| | - Cláudio Da Cunha
- Departamento de Farmacologia, Universidade Federal do Paraná, Curitiba 81531-980, PR, Brazil
| | - Rodrigo A Cunha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; Faculty of Medicine, University of Coimbra, 3005-504 Coimbra, Portugal
| | - Rui D Prediger
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis 88049-900, SC, Brazil; Centro de Neurociências Aplicadas (CeNAp), Hospital Universitário (HU), Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
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Santana MM, Rosmaninho-Salgado J, Cortez V, Pereira FC, Kaster MP, Aveleira CA, Ferreira M, Álvaro AR, Cavadas C. Impaired adrenal medullary function in a mouse model of depression induced by unpredictable chronic stress. Eur Neuropsychopharmacol 2015; 25:1753-66. [PMID: 26187454 DOI: 10.1016/j.euroneuro.2015.06.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 04/17/2015] [Accepted: 06/22/2015] [Indexed: 12/16/2022]
Abstract
Stress has been considered determinant in the etiology of depression. The adrenal medulla plays a key role in response to stress by releasing catecholamines, which are important to maintain homeostasis. We aimed to study the adrenal medulla in a mouse model of depression induced by 21 days of unpredictable chronic stress (UCS). We observed that UCS induced a differential and time-dependent change in adrenal medulla. After 7 days of UCS, mice did not show depressive-like behavior, but the adrenal medullae show increased protein and/or mRNA levels of catecholamine biosynthetic enzymes (TH, DβH and PNMT), Neuropeptide Y, the SNARE protein SNAP-25, the catecholamine transporter VMAT2 and the chromaffin progenitor cell markers, Mash1 and Phox2b. Moreover, 7 days of UCS induced a decrease in the chromaffin progenitor cell markers, Sox9 and Notch1. This suggests an increased capacity of chromaffin cells to synthesize, store and release catecholamines. In agreement, after 7 days, UCS mice had higher NE and EP levels in adrenal medulla. Opposite, when mice were submitted to 21 days of UCS, and showed a depressive like behavior, adrenal medullae had lower protein and/or mRNA levels of catecholamine biosynthetic enzymes (TH, DβH, PNMT), catecholamine transporters (NET, VMAT1), SNARE proteins (synthaxin1A, SNAP25, VAMP2), catecholamine content (EP, NE), and lower EP serum levels, indicating a reduction in catecholamine synthesis, re-uptake, storage and release. In conclusion, this study suggests that mice exposed to UCS for a period of 21 days develop a depressive-like behavior accompanied by an impairment of adrenal medullary function.
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Affiliation(s)
- Magda M Santana
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | | | - Vera Cortez
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Frederico C Pereira
- IBILI - Faculty of Medicine, University of Coimbra, Coimbra 3000-548, Portugal
| | - Manuella P Kaster
- Department of Biochemistry, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil
| | - Célia A Aveleira
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Marisa Ferreira
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Ana Rita Álvaro
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Cláudia Cavadas
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.
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Eisenlohr PV, Tavares JR, Oliveira SL, Santos AO, Valadão MBX, Bilce JM, Roberto RL, Castro HB, Zaratim ECP, Lima SL, Santos AJ, Silva APG, Lima LB, Melo-Santos KS, Figueiredo JDS, Santos LM, Pereira FC, Oliveira JCA, Miguel TB, Serpa AO, Kreutz C, Reis SMA. Thinking better about high-quality science: a look at some ethical flaws and productivity evaluation. BRAZ J BIOL 2015; 74:1009-10. [PMID: 25627616 DOI: 10.1590/1519-6984.17413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 03/11/2014] [Indexed: 11/21/2022] Open
Affiliation(s)
- P V Eisenlohr
- Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Alta Floresta, Alta Floresta, MT, Brasil
| | - J R Tavares
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - S L Oliveira
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - A O Santos
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - M B X Valadão
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - J M Bilce
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - R L Roberto
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - H B Castro
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - E C P Zaratim
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - S L Lima
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - A J Santos
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - A P G Silva
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - L B Lima
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - K S Melo-Santos
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - J D S Figueiredo
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - L M Santos
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - F C Pereira
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - J C A Oliveira
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - T B Miguel
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - A O Serpa
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - C Kreutz
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
| | - S M A Reis
- Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso - UNEMAT, Campus Universitário de Nova Xavantina, Nova Xavantina, MT, Brasil
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Silva CD, Neves AF, Dias AI, Freitas HJ, Mendes SM, Pita I, Viana SD, de Oliveira PA, Cunha RA, Fontes Ribeiro CA, Prediger RD, Pereira FC. A Single Neurotoxic Dose of Methamphetamine Induces a Long-Lasting Depressive-Like Behaviour in Mice. Neurotox Res 2013; 25:295-304. [DOI: 10.1007/s12640-013-9423-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/22/2013] [Accepted: 09/01/2013] [Indexed: 11/30/2022]
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Araújo SDC, Costa VM, Pereira FC, Fernandes E, Bastos MDL, Carvalho FD, Capela JP. ‘Ecstasy’ and amphetamine neurotoxicity to cultured rat cortical neurons in a continuous exposure model. Toxicol Lett 2013. [DOI: 10.1016/j.toxlet.2013.05.569] [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] [Indexed: 10/26/2022]
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Nunes S, Soares E, Fernandes J, Viana S, Carvalho E, Pereira FC, Reis F. Early cardiac changes in a rat model of prediabetes: brain natriuretic peptide overexpression seems to be the best marker. Cardiovasc Diabetol 2013; 12:44. [PMID: 23497124 PMCID: PMC3599663 DOI: 10.1186/1475-2840-12-44] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 03/04/2013] [Indexed: 12/15/2022] Open
Abstract
Background Diabetic cardiomyopathy (DCM) is defined as structural and functional changes in the myocardium due to metabolic and cellular abnormalities induced by diabetes mellitus (DM). The impact of prediabetic conditions on the cardiac tissue remains to be elucidated. The goal of this study was to elucidate whether cardiac dysfunction is already present in a state of prediabetes, in the presence of insulin resistance, and to unravel the underlying mechanisms, in a rat model without obesity and hypertension as confounding factors. Methods Two groups of 16-week-old Wistar rats were tested during a 9 week protocol: high sucrose (HSu) diet group (n = 7) – rats receiving 35% of sucrose in drinking water vs the vehicle control group (n = 7). The animal model was characterized in terms of body weight (BW) and the glycemic, insulinemic and lipidic profiles. The following parameters were assessed to evaluate possible early cardiac alterations and underlying mechanisms: blood pressure, heart rate, heart and left ventricle (LV) trophism indexes, as well as the serum and tissue protein and/or the mRNA expression of markers for fibrosis, hypertrophy, proliferation, apoptosis, angiogenesis, endothelial function, inflammation and oxidative stress. Results The HSu-treated rats presented normal fasting plasma glucose (FPG) but impaired glucose tolerance (IGT), accompanied by hyperinsulinemia and insulin resistance (P < 0.01), confirming this rat model as prediabetic. Furthermore, although hypertriglyceridemia (P < 0.05) was observed, obesity and hypertension were absent. Regarding the impact of the HSu diet on the cardiac tissue, our results indicated that 9 weeks of treatment might be associated with initial cardiac changes, as suggested by the increased LV weight/BW ratio (P < 0.01) and a remarkable brain natriuretic peptide (BNP) mRNA overexpression (P < 0.01), together with a marked trend for an upregulation of other important mediators of fibrosis, hypertrophy, angiogenesis and endothelial lesions, as well as oxidative stress. The inflammatory and apoptotic markers measured were unchanged. Conclusions This animal model of prediabetes/insulin resistance could be an important tool to evaluate the early cardiac impact of dysmetabolism (hyperinsulinemia and impaired glucose tolerance with fasting normoglycemia), without confounding factors such as obesity and hypertension. Left ventricle hypertrophy is already present and brain natriuretic peptide seems to be the best early marker for this condition.
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Affiliation(s)
- Sara Nunes
- Laboratory of Pharmacology and Experimental Therapeutics, IBILI, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Barros A, Vale CP, Oliveira FC, Ventura C, Assunção J, Fontes Ribeiro CA, Pereira FC. Dexamethasone effect on postoperative pain and tramadol requirement after thyroidectomy. Pharmacology 2013; 91:153-7. [PMID: 23392332 DOI: 10.1159/000346612] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 12/12/2012] [Indexed: 11/19/2022]
Abstract
Tramadol is a central-acting analgesic associated with nausea and vomiting. Clinical studies have demonstrated that glucocorticoids have analgesic and antiemetic effects when administered perioperatively. The aim of this study is to test the hypothesis that coadministration of tramadol and dexamethasone decreases both postoperative pain and tramadol requirement by patient-controlled analgesia (PCA). Forty female patients undergoing thyroidectomy under general anesthesia were enrolled in a double-blind randomized controlled study and allocated to receive dexamethasone 4 mg i.v. (dexamethasone group, n = 20) or saline (control group, n = 20). At 0, 1, 2, 4 and 22 h of PCA, tramadol consumption and pain were evaluated. Although pain (numerical rating scale 0-10) was significantly lower in the dexamethasone group compared to the control group (2.9 ± 1.4 vs. 3.8 ± 1.2, p = 0.02) at the beginning of PCA, tramadol demand was not significantly different. Although the results herein show a possible beneficial effect of a preoperative single low dose of dexamethasone on postoperative pain, the hypothesis that this corticosteroid decreases tramadol requirement is not supported.
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Affiliation(s)
- Ana Barros
- Department of Anaesthesiology, Centro Hospitalar Tondela-Viseu, E.P.E, Viseu, Portugal
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Fontes-Ribeiro CA, Marques E, Pereira FC, Silva AP, Macedo TRA. May exercise prevent addiction? Curr Neuropharmacol 2011; 9:45-8. [PMID: 21886560 PMCID: PMC3137199 DOI: 10.2174/157015911795017380] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Revised: 04/17/2010] [Accepted: 05/26/2010] [Indexed: 11/23/2022] Open
Abstract
Amphetamines exert their persistent addictive effects by activating brain's reward pathways, perhaps through the release of dopamine in the nucleus accumbens (and/or in other places). On the other hand, there is a relationship between dopamine and all behavioural aspects that involve motor activity and it has been demonstrated that exercise leads to an increase in the synthesis and release of dopamine, stimulates neuroplasticity and promotes feelings of well-being. Moreover, exercise and drugs of abuse activate overlapping neural systems. Thus, our aim was to study the influence of chronic exercise in the mechanism of addiction using an amphetamine-induced conditioned-place-preference in rats. Adult male Sprague-Dawley rats were randomly separated in groups with and without chronic exercise. Chronic exercise consisted in a 8 week treadmill running program, with increasing intensity. The conditioned place preference test was performed in both groups using a procedure and apparatus previously established. A 2 mg.kg-1 amphetamine or saline solution was administered intraperitonially according to the schedule of the conditioned place preference. Before conditioning none of the animals showed preference for a specific compartment of the apparatus. The used amphetamine dose in the conditioning phase was able to produce a marked preference towards the drug-associated compartment in the group without exercise. In the animals with exercise a significant preference by the compartment associated with saline was observed. These results lead us to conclude that a previous practice of regular physical activity may help preventing amphetamine addiction in the conditions used in this test.
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Affiliation(s)
- C A Fontes-Ribeiro
- Institute of Pharmacology and Experimental Therapeutics, Biomedical Institute for Research on Light and Image (IBILI), Faculty of Medicine; Association for Biomedical Research and Innovation on Light and Image (AIBILI); 3000 Coimbra, Portugal
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Pereira FC, Gough B, Macedo TR, Ribeiro CF, Ali SF, Binienda ZK. Buprenorphine modulates methamphetamine-induced dopamine dynamics in the rat caudate nucleus. Neurotox Res 2009; 19:94-101. [PMID: 20033362 DOI: 10.1007/s12640-009-9143-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 10/02/2009] [Accepted: 11/19/2009] [Indexed: 10/20/2022]
Abstract
Methamphetamine (METH) abuse and addiction present a major problem in the United States and globally. Oxidative stress associated with exposure to METH mediates to the large extent METH-evoked neurotoxicity. While there are currently no medications approved for treating METH addiction, its pharmacology provides opportunities for potential pharmacotherapeutic adjuncts to behavioral therapy in the treatment of METH addiction. Opioid receptor agonists can modulate the activity of dopamine neurons and could, therefore, modify the pharmacodynamic effects of METH in the dopaminergic system. Efficacy of the adjunctive medication with buprenorphine has been demonstrated in the treatment of cocaine addiction extending beyond opiate addiction. We investigated the interactions of morphine (10 mg/kg) and buprenorphine (0.01 and 10 mg/kg) with METH (2 mg/kg) affecting striatal dopaminergic transmission. The extracellular concentration of dopamine (DA) and its metabolite 3,4-dihydroxyphenylacetic acid (DOPAC) were determined using brain microdialysis coupled with high performance liquid chromatography with electrochemical detection (HPLC-ED) in the caudate nucleus of adult, awake, male Sprague-Dawley rats. Compared to METH alone, extracellular DA release was prolonged for 140 min without changes in DA peak-effect by combined treatment with morphine/METH. Morphine did not change DOPAC efflux evoked by METH. On the other hand, both buprenorphine doses attenuated the METH-induced DA peak-effect. However, whereas high buprenorphine dose extended DA outflow for 190 min, the low-dose abbreviated DA release. High buprenorphine dose also shortened METH-induced decrease in DOPAC efflux. Data confirm that opiates modulate dopaminergic neurotransmission evoked by METH. Alteration of dopaminergic response to METH challenge under buprenorphine may suggest effectiveness of buprenorphine treatment in METH addiction.
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Affiliation(s)
- Frederico C Pereira
- Institute of Pharmacology and Therapeutics, Biomedical Institute for Research in Light and Image, Faculty of Medicine, University of Coimbra, Subunit 1-Polo 3, Azinhaga de Santa Comba, Celas, 3000-354 Coimbra, Portugal.
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Marques E, Vasconcelos F, Rolo MR, Pereira FC, Silva AP, Macedo TR, Ribeiro CF. Influence of chronic exercise on the amphetamine-induced dopamine release and neurodegeneration in the striatum of the rat. Ann N Y Acad Sci 2008; 1139:222-31. [PMID: 18991868 DOI: 10.1196/annals.1432.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The aim of this study was to verify the effect of chronic exercise on the striatal dopamine (DA) outflow induced by low and high single doses of amphetamine (AMPH), and verify the existence of an exercise protective role on neurodegeneration. Adult male Sprague-Dawley rats were randomly separated into six groups: chronic exercise, saline; chronic exercise, 5 mg kg(-1) AMPH; chronic exercise, 30 mg kg(-1) AMPH; without exercise, saline; without exercise, 5 mg kg(-1) AMPH; without exercise, 30 mg kg(-1) AMPH. Chronic exercise consisted of an 8-week running program on a treadmill, with increasing intensity. Animals were anesthetized, placed into a stereotaxic frame and an intracerebral guide cannula implanted into the caudate-putamen. When indicated, microdialysis was performed. Dialysate samples were collected during 30-min intervals for 6 h, before and after the intraperitonial administration of AMPH or saline solution. HPLC with electrochemical detection was used to quantify DA. Chronic exercise did not significantly change the extracellular DA basal values. Regarding the maximal DA levels in the dialysates, in the rats treated with 5 mg kg(-1) AMPH, there was no significant difference between groups with and without chronic exercise; on the contrary, in animals treated with 30 mg kg(-1) AMPH, the DA release was lower in the group with chronic exercise. Moreover, the maintenance of higher levels of DA along time in the training group suggests a diminished reuptake of DA. By using the Fluoro-Jade C staining technique, we did not find neuronal death in any of the groups. In conclusion, these results suggest that chronic exercise leads to a diminished release and reuptake of DA after administration of a high dose of AMPH, whereas neither chronic exercise nor AMPH seems to induce neurodegeneration.
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Affiliation(s)
- Elsa Marques
- Department of Pharmacology, Biomedical Institute for Research on Light and Image (IBILI), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Pereira FC, Rolo MR, Marques E, Mendes VM, Ribeiro CF, Ali SF, Morgadinho T, Macedo TR. Acute Increase of the Glutamate-Glutamine Cycling in Discrete Brain Areas after Administration of a Single Dose of Amphetamine. Ann N Y Acad Sci 2008; 1139:212-21. [DOI: 10.1196/annals.1432.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Simões PF, Silva AP, Pereira FC, Marques E, Milhazes N, Borges F, Ribeiro CF, Macedo TR. Methamphetamine Changes NMDA and AMPA Glutamate Receptor Subunit Levels in the Rat Striatum and Frontal Cortex. Ann N Y Acad Sci 2008; 1139:232-41. [DOI: 10.1196/annals.1432.028] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Pereira FC, Lourenço E, Milhazes N, Morgadinho T, Ribeiro CF, Ali SF, Macedo TR. Methamphetamine, Morphine, and Their Combination: Acute Changes in Striatal Dopaminergic Transmission Evaluated by Microdialysis in Awake Rats. Ann N Y Acad Sci 2006; 1074:160-73. [PMID: 17105914 DOI: 10.1196/annals.1369.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The co-administration of methamphetamine (METH) and MOR (MOR)-like compounds is becoming increasingly popular among drug abusers. Recently, it was demonstrated that rats would self-inject METH-heroin combination and that this combination produced a greater rewarding effect than the identical doses of METH alone and it was further suggested that enhanced reward might underlie the popularity of this combination. However, there is null information on the effects of the MOR-METH combination on striatal dopaminergic transmission. In the present article, in vivo brain microdialysis was used to examine the effects of two METH doses (1 and 5 mg/kg, i.p.; [METH1: hyperlocomotion-inducing] and [METH5: stereotypy-inducing], respectively) and MOR (10 mg/kg, i.p. [MOR10]) either alone or in combination on dopamine (DA) and 3,4-dihydroxyphenylacetic acid (DOPAC) release in caudate putamen (CPu) in freely moving rats. METH1 evoked a transient threefold increase in DA overflow in only one-third of dosed rats. On the contrary, METH5 elicited a 11-fold increase in the extracellular DA levels 30 min after dosing and stayed significantly (P < 0.05) above control levels up to 1.5 h. On the other hand, MOR10 did not significantly change DA extracellular levels. MOR10-METH1 combination prolonged DA outflow for 1 h in all rats dosed without changing peak effect compared to METH1. On the other hand, MOR10-METH5 combination did not change the peak effect nor the DA outflow profile compared to METH5 alone. Consistently, there is a concentration-dependent decrease in DOPAC efflux evoked by METH: METH1 evoked a smaller decrease in DOPAC outflow showing a tendency for returning to basal values whereas METH5 kept DOPAC extracellular levels reduced throughout the experiment. Again, MOR10 did not significantly change DOPAC extracellular levels. MOR delayed the onset without changing METH effect on the DOPAC output. These findings provide suggestive evidence that MOR potentiated the increase in extracellular DA levels induced by a low dose of METH. Thus, this combination yields a profile of action that might underlie the reinforcing properties sought by drug addicts.
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Affiliation(s)
- Frederico C Pereira
- Instituto de Farmacologia e Terapêutica, Medical School, University of Coimbra, Rua Larga, Coimbra 3004-504, Portugal.
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Arruda S, Cândida J, Pereira F, Assis G, Martins D, Martins P, Pinto M, Pereira V. Crit Care 2005; 9:P88. [DOI: 10.1186/cc3632] [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] [Indexed: 11/10/2022] Open
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Pereira FC, Santos SD, Ribeiro CF, Ali SF, Macedo TR. A Single Exposure to Morphine Induces Long-Lasting Hyporeactivity of Rat Caudate Putamen Dopaminergic Nerve Terminals. Ann N Y Acad Sci 2004; 1025:414-23. [PMID: 15542744 DOI: 10.1196/annals.1316.051] [Citation(s) in RCA: 7] [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] [Indexed: 11/12/2022]
Abstract
The long-lasting effects of exposure to drugs of abuse on the brain is a central theme in drug addiction research. This study was designed to evaluate whether enduring neurochemical adaptations within caudate putamen can be evoked by a single injection of a high dose of morphine. Rats were pretreated once with 10 mg/kg morphine. Seven days later the effect of another injection of 10 mg/kg morphine on total levels of dopamine (DA), 3,4-dihydroxyphenylacetic acid (DOPAC), and homovanilic acid (HVA) in caudate putamen was assessed in half the pretreated animals. An irreversible mu-opioid receptor antagonist, cloccinamox (C-CAM; 0.1 mg/kg), significantly antagonized the elevation of the HVA/DA ratio, but not the elevation of the DOPAC/DA ratio induced by morphine in the caudate putamen from drug-naive animals. Pretreatment with morphine blunted changes in the HVA/DA ratio induced by another morphine challenge, but it had no effect on the DOPAC/DA ratio within the caudate putamen. Therefore, a single dose of 10 mg/kg morphine hampered nigrostriatal DA release and extraneuronal metabolism, mu-opioid receptor mediated, on another 10 mg/kg morphine challenge. This confirms that the first exposure to morphine does not go without long-lasting neurochemical adaptations.
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Affiliation(s)
- Frederico C Pereira
- Instituto de Farmacologia e Terapêutica, Medical School, University of Coimbra, Coimbra, Portugal.
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Pereira FC, Macedo TR, Imam SZ, Ribeiro CF, Ali SF. Lack of hydroxyl radical generation upon central administration of methamphetamine in rat caudate nucleus: a microdialysis study. Neurotox Res 2004; 6:149-52. [PMID: 15325967 DOI: 10.1007/bf03033217] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The most widely accepted concept of oxidative damage centers on the formation of hydroxyl radical (*OH) which has an extremely short-life and is the major damaging free radical. It was suggested that methamphetamine (METH) toxicity is mediated via production of *OH, as measured by 2,3-dihydroxybenzoic acid (2,3-DHBA). In this study we compared the effects of local caudate nucleus perfusion of METH with systemic administration of METH on *OH generation in relation to DA release. Local perfusion of METH (5 mM, 140 min) induced a higher level of dopamine (DA) release compared to the first METH injection (10 mg/kg, 3 times, i.p.). No significant correlation was found between changes in extracellular DA levels and *OH generation when perfusing METH locally; however, both increased after systemic METH administration.
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Affiliation(s)
- Frederico C Pereira
- Neurochemistry Laboratory, Division of Neurotoxicology, HFT-132, NCTR/FDA, Jefferson, AR 72079, USA
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Chies AB, Corrêa FMA, de Andrade CR, Rosa-e-Silva AAM, Pereira FC, de Oliveira AM. Vascular non-endothelial nitric oxide induced by swimming exercise stress in rats. Clin Exp Pharmacol Physiol 2003; 30:951-7. [PMID: 14678235 DOI: 10.1111/j.1440-1681.2003.03935.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
1. Herein, we report the effects of acute or chronic forced swimming on vascular responsiveness to angiotensin (Ang) II. 2. The possible involvement of locally produced substances, such as nitric oxide (NO) and prostanoids, in these effects were studied in rat thoracic aorta and superior mesenteric arteries. 3. Chronic, but not acute, swimming reduced the efficacy (maximal effect; Emax) of AngII in thoracic aorta and mesenteric arteries, either with intact or denuded endothelium. 4. The efficacy of AngII was reduced in the presence of indomethacin in mesenteric arteries, but not in the aorta, from either control or chronically stressed rats. 5. Treatment with NG-monomethyl-l-arginine reversed the effect of chronic stress on the response to AngII, suggesting that chronic stress may increase non-endothelial NO activity in both the aorta and mesenteric arteries. 6. The effects of acute and chronic stress on vascular reactivity were selective for AngII because no changes were observed on the effects of phenylephrine.
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MESH Headings
- Angiotensin II/antagonists & inhibitors
- Angiotensin II/pharmacology
- Animals
- Aorta, Thoracic/cytology
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/injuries
- Corticosterone/blood
- Dose-Response Relationship, Drug
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/injuries
- Endothelium, Vascular/physiology
- Indomethacin/pharmacology
- Male
- Mesenteric Artery, Superior/drug effects
- Mesenteric Artery, Superior/physiology
- Muscle, Smooth, Vascular/chemistry
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Nitric Oxide/metabolism
- Phenylephrine/pharmacology
- Physical Conditioning, Animal/methods
- Physical Conditioning, Animal/physiology
- Rats
- Rats, Wistar
- Stress, Physiological/metabolism
- Swimming/physiology
- omega-N-Methylarginine/pharmacology
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Affiliation(s)
- A B Chies
- Laboratory of Pharmacology, Faculty of Medicine of Marília, São Paulo, Brazil
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Pereira FC, Imam SZ, Gough B, Newport GD, Ribeiro CF, Slikker W, Macedo TR, Ali SF. Acute changes in dopamine release and turnover in rat caudate nucleus following a single dose of methamphetamine. J Neural Transm (Vienna) 2002; 109:1151-8. [PMID: 12203042 DOI: 10.1007/s00702-002-0754-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Acute changes in dopamine (DA) turnover were studied in the caudate nucleus (CN) of adult male rats between 0-24 h after a single injection of Methamphetamine (20 mg/kg, ip). A single dose of METH-induced an increase in DA turnover [(DOPAC + HVA)/DA] concomitant with an acute DA release followed by transient DA and DOPAC depletion in the rat CN.
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Affiliation(s)
- F C Pereira
- Neurochemistry Laboratory, Division of Neurotoxicology, NCTR, Jefferson 72079, AR, USA
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Pereira FC, Zanoni MVB, Guaratini CCI, Fogg AG. Differential pulse polarographic determination of clotrimazole after derivatization with Procion Red HE-3B. J Pharm Biomed Anal 2002; 27:201-8. [PMID: 11682227 DOI: 10.1016/s0731-7085(01)00526-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Clotrimazole was shown to react at room temperature in Britton Robinson buffer pH 2 with the reactive dye Procion Red HE-3B. The product exhibited a differential pulse polarographic peak at -0.38 V, which was well separated from the peaks of the reactive dye at -0.08, -0.80 and -0.95 V, and this allowed the indirect determination of clotrimazole in the presence of excess of the reactive dye. The method has been applied satisfactorily to the determination of clotrimazole in pharmaceutical formulations, calibration graphs are rectilinear up to at least 40 microg ml(-1). The detection limit was calculated to be 2.6 microg ml(-1) (3 sigma).
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Affiliation(s)
- F C Pereira
- Departamento de Química Analitica, Instituto de Química-Universidade Estadual Paulista, Caixa Postal 355, 14800-900, SP, Araraquara, Brazil
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Abstract
The phytochemical investigation of the hexane extract of Iryanthera juruensis (Myristicaceae) fruits led to the isolation of two tocotrienols and four lignans which exhibited antioxidant activity towards beta-carotene on TLC autographic assay. Two inactive quinones and three omega-arylalkanoic acids were also isolated. The isolates were investigated for their redox properties using cyclic voltammetry. The structure elucidation of the new compounds (one tocotrienol. one quinone and three omega-arylalkanoic acids) was based on analysis of spectroscopic data.
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Affiliation(s)
- D H Silva
- Instituto de Química, Universidade Estadual Paulista, Araraquara-SP, Brazil.
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Visentainer JE, Pereira FC, Dalalio MM, Tsuneto LT, Donadio PR, Moliterno RA. Association of HLA-DR7 with rheumatic fever in the Brazilian population. J Rheumatol 2000; 27:1518-20. [PMID: 10852281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE Rheumatic fever (RF) is a multisystem inflammatory disease that develops as a sequel of untreated throat infection by the group A beta-hemolytic streptococcus. As HLA antigens are known to be important in controlling immunological responsiveness, studies have investigated HLA antigen association with RF. Studies with Caucasians, Black Americans, and Indians showed associations with HLA-DR4, DR2, and DR3, respectively. One study on a Brazilian population suggested an association with HLA-DR7 and HLA-DR53. We investigated the association between RF and antigens HLA-DR7 and DR53 in the white Brazilian population. METHODS Thirty-five patients and 209 healthy individuals living in the northern region of the state of Parana, Brazil, were used as test and control groups, respectively. Classical statistical methods were used to compare HLA frequencies between these groups. Results. Data confirmed positive association with HLA-DR7 (46.7 vs. 25.7%; p = 0.015), but not with HLA-DR53 (54.3 vs. 44.5%; p = 0.28). The relative risk and etiologic fractions were 2.4 and 0.27%, respectively. CONCLUSION Positive association between HLA-DR7 specificity and RF was observed in the white Brazilian population by 2 independent studies, supporting the hypothesis of the involvement of genetic factors in susceptibility of rheumatic fever.
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Affiliation(s)
- J E Visentainer
- Department of Clinical Analysis, Maringá State University, PR, Brazil
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