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Paiva B, Laranjinha J, Rocha BS. Do oral and gut microbiota communicate through redox pathways? A novel asset of the nitrate-nitrite-NO pathway. FEBS Lett 2024. [PMID: 38523057 DOI: 10.1002/1873-3468.14859] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/16/2024] [Accepted: 02/29/2024] [Indexed: 03/26/2024]
Abstract
Nitrate may act as a regulator of •NO bioavailability via sequential reduction along the nitrate-nitrite-NO pathway with widespread health benefits, including a eubiotic effect on the oral and gut microbiota. Here, we discuss the molecular mechanisms of microbiota-host communication through redox pathways, via the production of •NO and oxidants by the family of NADPH oxidases, namely hydrogen peroxide (via Duox2), superoxide radical (via Nox1 and Nox2) and peroxynitrite, which leads to downstream activation of stress responses (Nrf2 and NFkB pathways) in the host mucosa. The activation of Nox2 by microbial metabolites is also discussed. Finally, we propose a new perspective in which both oral and gut microbiota communicate through redox pathways, with nitrate as the pivot linking both ecosystems.
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Affiliation(s)
- Beatriz Paiva
- Faculty of Pharmacy, University of Coimbra, Portugal
| | - João Laranjinha
- Faculty of Pharmacy, University of Coimbra, Portugal
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
| | - Bárbara S Rocha
- Faculty of Pharmacy, University of Coimbra, Portugal
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
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2
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Gonçalves JS, Marçal AL, Marques BS, Costa FD, Laranjinha J, Rocha BS, Lourenço CF. Dietary nitrate supplementation and cognitive health: the nitric oxide-dependent neurovascular coupling hypothesis. Biochem Soc Trans 2024; 52:279-289. [PMID: 38385536 DOI: 10.1042/bst20230491] [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: 11/24/2023] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
Diet is currently recognized as a major modifiable agent of human health. In particular, dietary nitrate has been increasingly explored as a strategy to modulate different physiological mechanisms with demonstrated benefits in multiple organs, including gastrointestinal, cardiovascular, metabolic, and endocrine systems. An intriguing exception in this scenario has been the brain, for which the evidence of the nitrate benefits remains controversial. Upon consumption, nitrate can undergo sequential reduction reactions in vivo to produce nitric oxide (•NO), a ubiquitous paracrine messenger that supports multiple physiological events such as vasodilation and neuromodulation. In the brain, •NO plays a key role in neurovascular coupling, a fine process associated with the dynamic regulation of cerebral blood flow matching the metabolic needs of neurons and crucial for sustaining brain function. Neurovascular coupling dysregulation has been associated with neurodegeneration and cognitive dysfunction during different pathological conditions and aging. We discuss the potential biological action of nitrate on brain health, concerning the molecular mechanisms underpinning this association, particularly via modulation of •NO-dependent neurovascular coupling. The impact of nitrate supplementation on cognitive performance was scrutinized through preclinical and clinical data, suggesting that intervention length and the health condition of the participants are determinants of the outcome. Also, it stresses the need for multimodal quantitative studies relating cellular and mechanistic approaches to function coupled with behavior clinical outputs to understand whether a mechanistic relationship between dietary nitrate and cognitive health is operative in the brain. If proven, it supports the exciting hypothesis of cognitive enhancement via diet.
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Affiliation(s)
- João S Gonçalves
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga 3004-504 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Ana L Marçal
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Bárbara S Marques
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Filipa D Costa
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga 3004-504 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Bárbara S Rocha
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga 3004-504 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga 3004-504 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Health Science Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
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Reis A, Rocha BS, Laranjinha J, de Freitas V. Dietary (poly)phenols as modulators of the biophysical properties in endothelial cell membranes: its impact on nitric oxide bioavailability in hypertension. FEBS Lett 2024. [PMID: 38281810 DOI: 10.1002/1873-3468.14812] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/18/2023] [Accepted: 12/27/2023] [Indexed: 01/30/2024]
Abstract
Hypertension is a major contributor to premature death, owing to the associated increased risk of damage to the heart, brain and kidneys. Although hypertension is manageable by medication and lifestyle changes, the risk increases with age. In an increasingly aged society, the incidence of hypertension is escalating, and is expected to increase the prevalence of (cerebro)vascular events and their associated mortality. Adherence to plant-based diets improves blood pressure and vascular markers in individuals with hypertension. Food flavonoids have an inhibitory effect towards angiotensin-converting enzyme (ACE1) and although this effect is greatly diminished upon metabolization, their microbial metabolites have been found to improve endothelial nitric oxide synthase (eNOS) activity. Considering the transmembrane location of ACE1 and eNOS, the ability of (poly)phenols to interact with membrane lipids modulate the cell membrane's biophysical properties and impact on nitric oxide (· NO) synthesis and bioavailability, remain poorly studied. Herein, we provide an overview of the current knowledge on the lipid remodeling of endothelial membranes with age, its impact on the cell membrane's biophysical properties and · NO permeability across the endothelial barrier. We also discuss the potential of (poly)phenols and other plant-based compounds as key players in hypertension management, and address the caveats and challenges in adopted methodologies.
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Affiliation(s)
- Ana Reis
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Portugal
| | - Barbara S Rocha
- Faculty of Pharmacy and Center for Neuroscience and Cell Biology, University of Coimbra, Polo das Ciências da Saúde, Portugal
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neuroscience and Cell Biology, University of Coimbra, Polo das Ciências da Saúde, Portugal
| | - Victor de Freitas
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Portugal
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Dias C, Fernandes E, Barbosa RM, Laranjinha J, Ledo A. Astrocytic aerobic glycolysis provides lactate to support neuronal oxidative metabolism in the hippocampus. Biofactors 2023; 49:875-886. [PMID: 37070143 DOI: 10.1002/biof.1951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/23/2023] [Indexed: 04/19/2023]
Abstract
Under physiological conditions, the energetic demand of the brain is met by glucose oxidation. However, ample evidence suggests that lactate produced by astrocytes through aerobic glycolysis may also be an oxidative fuel, highlighting the metabolic compartmentalization between neural cells. Herein, we investigate the roles of glucose and lactate in oxidative metabolism in hippocampal slices, a model that preserves neuron-glia interactions. To this purpose, we used high-resolution respirometry to measure oxygen consumption (O2 flux) at the whole tissue level and amperometric lactate microbiosensors to evaluate the concentration dynamics of extracellular lactate. We found that lactate is produced from glucose and transported to the extracellular space by neural cells in hippocampal tissue. Under resting conditions, endogenous lactate was used by neurons to support oxidative metabolism, which was boosted by exogenously added lactate even in the presence of excess glucose. Depolarization of hippocampal tissue with high K+ significantly increased the rate of oxidative phosphorylation, which was accompanied by a transient decrease in extracellular lactate concentration. Both effects were reverted by inhibition of the neuronal lactate transporter, monocarboxylate transporters 2 (MCT2), supporting the concept of an inward flux of lactate to neurons to fuel oxidative metabolism. We conclude that astrocytes are the main source of extracellular lactate which is used by neurons to fuel oxidative metabolism, both under resting and stimulated conditions.
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Affiliation(s)
- Cândida Dias
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Eliana Fernandes
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
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Fraga CG, Trostchansky A, Rocha BS, Laranjinha J, Rubbo H, Galleano M. (Poly)phenols and nitrolipids: Relevant participants in nitric oxide metabolism. Mol Aspects Med 2023; 89:101158. [PMID: 36517273 DOI: 10.1016/j.mam.2022.101158] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 09/26/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 12/14/2022]
Abstract
Nitric oxide (•NO) is an essential molecule able to control and regulate many biological functions. Additionally, •NO bears a potential toxicity or damaging effects under conditions of uncontrolled production, and because of its participation in redox-sensitive pathways and oxidizing reactions. Several plant (poly)phenols present in the diet are able to regulate the enzymes producing •NO (NOSs). In addition, (poly)phenols are implicated in defining •NO bioavailability, especially by regulating NADPH oxidases (NOXs), and the subsequent generation of superoxide and •NO depletion. Nitrolipids are compounds that are present in animal tissues because of dietary consumption, e.g. of olive oil, and/or as result of endogenous production. This endogenous production of nitrolipids is dependent on the nitrate/nitrite presence in the diet. Select nitrolipids, e.g. the nitroalkenes, are able to exert •NO-like signaling actions, and act as •NO reservoirs, becoming relevant for systemic •NO bioavailability. Furthermore, the presence of (poly)phenols in the stomach reduces dietary nitrite to •NO favoring nitrolipids formation. In this review we focus on the capacity of molecules representing these two groups of bioactives, i.e. (poly)phenols and nitrolipids, as relevant participants in •NO metabolism and bioavailability. This participation acquires especial relevance when human homeostasis is lost, for example under inflammatory conditions, in which the protective actions of (poly)phenols and/or nitrolipids have been associated with local and systemic •NO bioavailability.
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Affiliation(s)
- César G Fraga
- Physical Chemistry, School of Pharmacy and Biochemistry, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Bioquímica y Medicina Molecular-Dr. Alberto Boveris (IBIMOL), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina; Department of Nutrition, University of California, Davis, CA, USA
| | - Andrés Trostchansky
- Departamento de Bioquímica, Facultad de Medicina, Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay
| | - Barbara S Rocha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Homero Rubbo
- Departamento de Bioquímica, Facultad de Medicina, Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay
| | - Monica Galleano
- Physical Chemistry, School of Pharmacy and Biochemistry, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Bioquímica y Medicina Molecular-Dr. Alberto Boveris (IBIMOL), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina.
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Gonçalves JS, Seiça RM, Laranjinha J, Lourenço CF. Impairment of neurovascular coupling in the hippocampus due to decreased nitric oxide bioavailability supports early cognitive dysfunction in type 2 diabetic rats. Free Radic Biol Med 2022; 193:669-675. [PMID: 36372286 DOI: 10.1016/j.freeradbiomed.2022.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/01/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022]
Abstract
Numerous epidemiological and preclinical studies have established a strong correlation between type 2 diabetes (T2DM) and cognitive impairment and T2DM is now established as an undisputable risk factor in different forms of dementia. However, the mechanisms underlying cognitive impairment in T2DM are still not fully understood. The temporal and spatial coupling between neuronal activity and cerebral blood flow (CBF) - neurovascular coupling (NVC) - is essential for normal brain function. Neuronal-derived nitric oxide (⦁NO) produced through the nNOS-NMDAr pathway, is recognized as a key messenger in NVC, especially in the hippocampus. Of note, impaired hippocampal perfusion in T2DM patients has been closely linked to learning and memory dysfunction. In this study, we aimed to investigate the functionality of NVC, in terms of neuronal-•NO signaling and spatial memory performance, in young Goto-Kakizaki (GK) rats, a non-obese model of T2DM. For that, we performed direct and simultaneous measurements of •NO concentration dynamics and microvascular CBF changes in the hippocampus upon glutamatergic activation. We found that limited •NO bioavailability, connected to shorter and faster •NO transients in response to glutamatergic neuronal activation, is associated with decreased hemodynamic responses and a decline in spatial memory performance. This evidence supports a close mechanistic association between neuronal-triggered •NO concentration dynamics in the hippocampus, local microvascular responses, and cognitive performance in young diabetic animals, establishing the functionality of NVC as a critical early factor to consider in the cascade of events leading to cognitive decline in T2DM. These results suggest that strategies capable to overcome the limited •NO bioavailability in early stages of T2DM and maintaining a functional NVC pathway may configure pertinent therapeutic approaches to mitigate the risk for cognitive impairment in T2DM.
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Affiliation(s)
- João S Gonçalves
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Raquel M Seiça
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.
| | - Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.
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Dias C, Lourenço CF, Laranjinha J, Ledo A. Modulation of oxidative neurometabolism in ischemia/reperfusion by nitrite. Free Radic Biol Med 2022; 193:779-786. [PMID: 36403737 DOI: 10.1016/j.freeradbiomed.2022.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/08/2022] [Accepted: 11/12/2022] [Indexed: 11/19/2022]
Abstract
Nitrite has been viewed essentially as an inert metabolic endpoint of nitric oxide (•NO). However, under certain conditions, nitrite can be a source of •NO. In the brain, this alternative source of •NO production independent of nitric oxide synthase activity may be particularly relevant in ischemia/reperfusion (I/R), where low oxygen availability limits enzymatic production of •NO. Notably, in vivo concentration of nitrite can be easily increased with diet, through the ingestion of nitrate-rich foods, opening the window for a therapeutic intervention based on diet. Considering the modulation of mitochondrial respiration by •NO, we have hypothesized that the protective action of nitrite in I/R may also result from modulation of mitochondrial function. We used high-resolution respirometry to evaluate the effects of nitrite in two in vitro models of I/R. In both cases, an increase in oxygen flux was observed following reoxygenation, a phenomenon that has been coined "oxidative burst". The amplitude of this "oxidative burst" was decreased by nitrite in a concentration-dependent manner. Additionally, a pilot in vivo study in which animals received a nitrate-rich diet as a strategy to increase circulating and tissue levels of nitrite also revealed that the "oxidative burst" was decreased in the nitrate-treated animals. These results may provide mechanistic support to the observation of a protective effect of nitrite in situations of brain ischemia.
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Affiliation(s)
- C Dias
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal; Center for Neuroscience and Cell Biology, Coimbra, Portugal
| | - C F Lourenço
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal; Center for Neuroscience and Cell Biology, Coimbra, Portugal
| | - J Laranjinha
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal; Center for Neuroscience and Cell Biology, Coimbra, Portugal
| | - A Ledo
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal; Center for Neuroscience and Cell Biology, Coimbra, Portugal.
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Ledo A, Fernandes E, Salvador A, Laranjinha J, Barbosa R. In vivo hydrogen peroxide diffusivity in brain tissue supports volume signaling activity. Redox Biol 2022; 50:102250. [PMID: 35101799 PMCID: PMC8804256 DOI: 10.1016/j.redox.2022.102250] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 01/18/2022] [Accepted: 01/24/2022] [Indexed: 12/21/2022] Open
Abstract
Hydrogen peroxide is a major redox signaling molecule underlying a novel paradigm of cell function and communication. A role for H2O2 as an intercellular signaling molecule and neuromodulator in the brain has become increasingly apparent, with evidence showing this biological oxidant to regulate neuronal polarity, connectivity, synaptic transmission and tuning of neuronal networks. This notion is supported by its ability to diffuse in the extracellular space, from source of production to target. It is, thus, crucial to understand extracellular H2O2 concentration dynamics in the living brain and the factors which shape its diffusion pattern and half-life. To address this issue, we have used a novel microsensor to measure H2O2 concentration dynamics in the brain extracellular matrix both in an ex vivo model using rodent brain slices and in vivo. We found that exogenously applied H2O2 is removed from the extracellular space with an average half-life of t1/2 = 2.2 s in vivo. We determined the in vivo effective diffusion coefficient of H2O2 to be D* = 2.5 × 10−5 cm2 s−1. This allows it to diffuse over 100 μm in the extracellular space within its half-life. Considering this, we can tentatively place H2O2 within the class of volume neurotransmitters, connecting all cell types within the complex network of brain tissue, regardless of whether they are physically connected. These quantitative details of H2O2 diffusion and half-life in the brain allow us to interpret the physiology of the redox signal and lay the pavement to then address dysregulation in redox homeostasis associated with disease processes.
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Lourenço CF, Laranjinha J. Nitric Oxide Pathways in Neurovascular Coupling Under Normal and Stress Conditions in the Brain: Strategies to Rescue Aberrant Coupling and Improve Cerebral Blood Flow. Front Physiol 2021; 12:729201. [PMID: 34744769 PMCID: PMC8569710 DOI: 10.3389/fphys.2021.729201] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 06/22/2021] [Accepted: 09/20/2021] [Indexed: 01/04/2023] Open
Abstract
The brain has impressive energy requirements and paradoxically, very limited energy reserves, implying its huge dependency on continuous blood supply. Aditionally, cerebral blood flow must be dynamically regulated to the areas of increased neuronal activity and thus, of increased metabolic demands. The coupling between neuronal activity and cerebral blood flow (CBF) is supported by a mechanism called neurovascular coupling (NVC). Among the several vasoactive molecules released by glutamatergic activation, nitric oxide (•NO) is recognized to be a key player in the process and essential for the development of the neurovascular response. Classically, •NO is produced in neurons upon the activation of the glutamatergic N-methyl-D-aspartate (NMDA) receptor by the neuronal isoform of nitric oxide synthase and promotes vasodilation by activating soluble guanylate cyclase in the smooth muscle cells of the adjacent arterioles. This pathway is part of a more complex network in which other molecular and cellular intervenients, as well as other sources of •NO, are involved. The elucidation of these interacting mechanisms is fundamental in understanding how the brain manages its energy requirements and how the failure of this process translates into neuronal dysfunction. Here, we aimed to provide an integrated and updated perspective of the role of •NO in the NVC, incorporating the most recent evidence that reinforces its central role in the process from both viewpoints, as a physiological mediator and a pathological stressor. First, we described the glutamate-NMDA receptor-nNOS axis as a central pathway in NVC, then we reviewed the link between the derailment of the NVC and neuronal dysfunction associated with neurodegeneration (with a focus on Alzheimer's disease). We further discussed the role of oxidative stress in the NVC dysfunction, specifically by decreasing the •NO bioavailability and diverting its bioactivity toward cytotoxicity. Finally, we highlighted some strategies targeting the rescue or maintenance of •NO bioavailability that could be explored to mitigate the NVC dysfunction associated with neurodegenerative conditions. In line with this, the potential modulatory effects of dietary nitrate and polyphenols on •NO-dependent NVC, in association with physical exercise, may be used as effective non-pharmacological strategies to promote the •NO bioavailability and to manage NVC dysfunction in neuropathological conditions.
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Affiliation(s)
- Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
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Ledo A, Lourenço CF, Cadenas E, Barbosa RM, Laranjinha J. The bioactivity of neuronal-derived nitric oxide in aging and neurodegeneration: Switching signaling to degeneration. Free Radic Biol Med 2021; 162:500-513. [PMID: 33186742 DOI: 10.1016/j.freeradbiomed.2020.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 12/22/2022]
Abstract
The small and diffusible free radical nitric oxide (•NO) has fascinated biological and medical scientists since it was promoted from atmospheric air pollutant to biological ubiquitous signaling molecule. Its unique physical chemical properties expand beyond its radical nature to include fast diffusion in aqueous and lipid environments and selective reactivity in a biological setting determined by bioavailability and reaction rate constants with biomolecules. In the brain, •NO is recognized as a key player in numerous physiological processes ranging from neurotransmission/neuromodulation to neurovascular coupling and immune response. Furthermore, changes in its bioactivity are central to the molecular pathways associated with brain aging and neurodegeneration. The understanding of •NO bioactivity in the brain, however, requires the knowledge of its concentration dynamics with high spatial and temporal resolution upon stimulation of its synthesis. Here we revise our current understanding of the role of neuronal-derived •NO in brain physiology, aging and degeneration, focused on changes in the extracellular concentration dynamics of this free radical and the regulation of bioenergetic metabolism and neurovascular coupling.
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Affiliation(s)
- A Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504, Coimbra, Portugal; University of Coimbra, Faculty of Pharmacy, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.
| | - C F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504, Coimbra, Portugal; University of Coimbra, Faculty of Pharmacy, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - E Cadenas
- Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, 90089, CA, USA
| | - R M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504, Coimbra, Portugal; University of Coimbra, Faculty of Pharmacy, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - J Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504, Coimbra, Portugal; University of Coimbra, Faculty of Pharmacy, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
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Tavares A, Magalhães D, Soares A, Laranjinha J, Mesquita A, Duarte F, Abreu R, Magalhães H, Braga F, Sottomayor C, Salgado M. 1772P Impact assessment of SARS-CoV-2 testing on cancer patients undergoing immunosuppressive treatment. Ann Oncol 2020. [PMCID: PMC7506417 DOI: 10.1016/j.annonc.2020.08.1836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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12
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Rodrigues MS, Ferreira C, Dias C, Pliássova A, Souza L, Ledo A, Laranjinha J, Cunha RA, Köfalvi A. An optimized spectrophotometric assay reveals increased activity of enzymes involved in 2-arachidonoyl glycerol turnover in the cerebral cortex of a rat model of Alzheimer's disease. Eur J Neurosci 2020; 55:1051-1062. [PMID: 32813905 DOI: 10.1111/ejn.14944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/30/2020] [Accepted: 08/12/2020] [Indexed: 01/29/2023]
Abstract
The endocannabinoid system is implicated in a plethora of neuropsychiatric disorders. However, it is technically challenging to assess the turnover of 2-arachidonoyl glycerol (2-AG), the principal endocannabinoid molecule in the brain. Two recent studies showed that diacylglycerol lipase α (DAGLα), an enzyme chiefly responsible for the cerebral production of 2-AG, also accepts the surrogate chromogenic substrate 4-nitrophenyl butyrate (4-NPB). Here, we aimed to optimize this spectrophotometric assay for ex vivo brain tissue, in particular, rat cerebrocortical homogenates, to measure the activity of the major enzymes responsible for the production and degradation of 2-AG. The initial velocity of 4-NPB hydrolysis was dependent on protein, substrate, and Ca2+ concentrations, and was sensitive to the non-selective serine hydrolase inhibitor, methoxy arachidonyl fluorophosphonate, the DAGLα inhibitors, OMDM188, tetrahydrolipstatin, and RHC80267, as well as the monoacylglycerol lipase (MAGL) inhibitor, JZL184, respectively. Next, we tested the usefulness of this assay in ex vivo brain tissue of rat models of human health conditions known to affect cerebrocortical 2-AG production, i.e. pathological stress and sporadic Alzheimer's disease (AD). In rats submitted to chronic restraint stress, cortical CB1 R density was significantly decreased, as assessed with radioligand binding. Nevertheless, 4-NPB hydrolysis remained at control levels. However, in rats 4 weeks after intracerebroventricular injection with streptozotocin - an established model of sporadic AD -, both CB1 R levels and 4-NPB hydrolysis and its DAGL- and MAGL-dependent fractions were significantly increased. Altogether, we optimized a simple complementary ex vivo technique for the quantification of DAGL and MAGL activity in brain samples.
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Affiliation(s)
- Matilde S Rodrigues
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Cláudia Ferreira
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Cândida Dias
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Anna Pliássova
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Lisiane Souza
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Ana Ledo
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Rodrigo A Cunha
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Attila Köfalvi
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal
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13
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Laranjinha J, Nunes C, Ledo A, Lourenço C, Rocha B, Barbosa RM. The Peculiar Facets of Nitric Oxide as a Cellular Messenger: From Disease-Associated Signaling to the Regulation of Brain Bioenergetics and Neurovascular Coupling. Neurochem Res 2020; 46:64-76. [PMID: 32193753 DOI: 10.1007/s11064-020-03015-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 03/07/2020] [Accepted: 03/12/2020] [Indexed: 12/13/2022]
Abstract
In this review, we address the regulatory and toxic role of ·NO along several pathways, from the gut to the brain. Initially, we address the role on ·NO in the regulation of mitochondrial respiration with emphasis on the possible contribution to Parkinson's disease via mechanisms that involve its interaction with a major dopamine metabolite, DOPAC. In parallel with initial discoveries of the inhibition of mitochondrial respiration by ·NO, it became clear the potential for toxic ·NO-mediated mechanisms involving the production of more reactive species and the post-translational modification of mitochondrial proteins. Accordingly, we have proposed a novel mechanism potentially leading to dopaminergic cell death, providing evidence that NO synergistically interact with DOPAC in promoting cell death via mechanisms that involve GSH depletion. The modulatory role of NO will be then briefly discussed as a master regulator on brain energy metabolism. The energy metabolism in the brain is central to the understanding of brain function and disease. The core role of ·NO in the regulation of brain metabolism and vascular responses is further substantiated by discussing its role as a mediator of neurovascular coupling, the increase in local microvessels blood flow in response to spatially restricted increase of neuronal activity. The many facets of NO as intracellular and intercellular messenger, conveying information associated with its spatial and temporal concentration dynamics, involve not only the discussion of its reactions and potential targets on a defined biological environment but also the regulation of its synthesis by the family of nitric oxide synthases. More recently, a novel pathway, out of control of NOS, has been the subject of a great deal of controversy, the nitrate:nitrite:NO pathway, adding new perspectives to ·NO biology. Thus, finally, this novel pathway will be addressed in connection with nitrate consumption in the diet and the beneficial effects of protein nitration by reactive nitrogen species.
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Affiliation(s)
- João Laranjinha
- Faculty of Pharmacy, University of Coimbra, Azinhaga Sta. Comba, 3000-548, Coimbra, Portugal. .,Center for Neuroscience and Cell Biology, University of Coimbra, Pólo 1, 3000-504, Coimbra, Portugal.
| | - Carla Nunes
- Faculty of Pharmacy, University of Coimbra, Azinhaga Sta. Comba, 3000-548, Coimbra, Portugal.,Center for Neuroscience and Cell Biology, University of Coimbra, Pólo 1, 3000-504, Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Pólo 1, 3000-504, Coimbra, Portugal
| | - Cátia Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Pólo 1, 3000-504, Coimbra, Portugal
| | - Bárbara Rocha
- Faculty of Pharmacy, University of Coimbra, Azinhaga Sta. Comba, 3000-548, Coimbra, Portugal.,Center for Neuroscience and Cell Biology, University of Coimbra, Pólo 1, 3000-504, Coimbra, Portugal
| | - Rui M Barbosa
- Faculty of Pharmacy, University of Coimbra, Azinhaga Sta. Comba, 3000-548, Coimbra, Portugal.,Center for Neuroscience and Cell Biology, University of Coimbra, Pólo 1, 3000-504, Coimbra, Portugal
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14
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Rocha BS, Laranjinha J. Nitrate from diet might fuel gut microbiota metabolism: Minding the gap between redox signaling and inter-kingdom communication. Free Radic Biol Med 2020; 149:37-43. [PMID: 32045656 DOI: 10.1016/j.freeradbiomed.2020.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/29/2020] [Accepted: 02/03/2020] [Indexed: 12/19/2022]
Abstract
The gut microbiota has been recently interpreted in terms of a metabolic organ that influences the host through reciprocal interactions, encompassing metabolic and immune pathways, genetic and epigenetic programming in host mammal tissues in a diet-depended manner, that shape virtually all aspects of host physiology. In this scenario, dietary nitrate, a major component of leafy green vegetables known for their health benefits, might fuel microbiota metabolism with ensued consequences for microbiota-host interaction. Cumulating evidence support that nitrate shapes oral microbiome communities with impact on the kinetics and systemic levels of both nitrate and nitrite. However, the impact of nitrate, which is steadily delivered into the lower gastrointestinal tract after a vegetable-rich meal, in the intestinal microbiome communities and their functional capacity remains largely elusive. Several mechanisms reinforce the notion that nitrate may be a nutrient for the lower microbiome and might participate in local redox interactions with relevance for bacteria-host interactions, among these nitric oxide-dependent mechanisms along the nitrate-nitrite-nitric oxide pathway. Also, by allowing bacteria to thrive, either by increasing microbial biomass or by acting as a respiratory substrate for the existing communities, nitrate ensures the production of bacterial metabolites (e.g., pathogen-associated molecular patterns, PAMP, short chain fatty acids, among other) that are recognised by host receptors (such as toll-like, TLR, and formyl peptide receptors, FPR) thereby activating local signalling pathways. Here, we elaborate on the notion that via modulation of intestinal microbiota metabolism, dietary nitrate impacts on host-microbiota metabolic and redox interactions, thereby contributing as an essential nutrient to optimal health.
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Affiliation(s)
- Bárbara S Rocha
- Faculty of Pharmacy and Center for Neuroscience and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neuroscience and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
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15
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Nunes C, Freitas V, Almeida L, Laranjinha J. Red wine extract preserves tight junctions in intestinal epithelial cells under inflammatory conditions: implications for intestinal inflammation. Food Funct 2019; 10:1364-1374. [PMID: 30735221 DOI: 10.1039/c8fo02469c] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The altered expression and subcellular distribution of tight junction (TJ) proteins, leading to a dysfunctional intestinal barrier, is a key mechanistic feature of inflammatory bowel disease (IBD). Therefore, increasing the integrity of the intestinal barrier by manipulating the TJ may constitute an innovative and effective therapeutic strategy in IBD. In this context, recent studies showed that dietary polyphenols are able to protect the intestinal TJ barrier integrity. Here, using a cellular model of intestinal inflammation, consisting of cytokine-stimulated HT-29 colon epithelial cells, we show that a polyphenolic extract obtained from Portuguese red wine (RWE) decreased the paracellular permeability across the cell monolayer compared with the control cells, even in the presence of pro-inflammatory cytokines. The beneficial effect of RWE was exerted at three complementary levels: (1) by promoting a significant increase of the mRNA of key barrier-forming TJ proteins, including occludin, claudin-5 and zonnula occludens (ZO)-1 above the levels observed in the control cells; (2) by preventing the decrease in the expression of these proteins under inflammatory conditions and (3) by averting the increase in claudin-2 mRNA, a channel-forming TJ protein induced by pro-inflammatory cytokines. Taken together, these results strongly suggest that polyphenols presented and consumed in red wine as a mixture can reinforce and protect the intestinal barrier against inflammatory stimulus by affecting the TJ protein expression and, thus, without the need for purifying individual compounds, might represent a readily available therapeutic intervention against IBD and intestinal inflammation.
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Affiliation(s)
- Carla Nunes
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
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16
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Abstract
Current treatment strategies for inflammatory bowel diseases (IBDs) are associated with a lower efficacy and with several side effects that strongly affect the quality of life of IBD patients. Consequently, the development of new therapies, combining efficacy and safety is an important goal in the field of intestinal inflammation. In this context, evidence supports that polyphenols can be promising candidates due to their ability to modulate intracellular inflammatory signalling cascades. Luteolin, a naturally occurring flavonoid, exhibits anti-inflammatory properties in several models of inflammation. However, its action against intestinal inflammation has been poorly explored. Therefore, there is a lack of scientific knowledge about the potential impact of luteolin in the intestinal inflammation, particularly regarding the underlying molecular mechanisms by which luteolin can exert its anti-inflammatory action. We assessed the potential anti-inflammatory effect of luteolin in a cellular model of intestinal inflammation using cytokine-stimulated HT-29 colon epithelial cells, and the underlying key molecular mechanisms were identified. Luteolin significantly inhibited interleukine-8 (IL-8) production, cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) expression and nitric oxide (˙NO) overproduction induced by cytokines, indicating that luteolin negatively modulates key inflammatory signalling cascades underlying intestinal inflammation. Mechanistically, the inhibition of the JAK/STAT pathway was identified as a critical mechanism by which luteolin exerts its intestinal anti-inflammatory action. This study uncovers novel molecular mechanisms by which luteolin may act against intestinal inflammation, which might support the use of luteolin as a future therapeutic strategy in IBD.
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Affiliation(s)
- Carla Nunes
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Leonor Almeida
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Rui M Barbosa
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - João Laranjinha
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
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17
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Laranjinha J, Lourenço C, Ledo A, Dias C, Ferreira N, Barbosa RM. NITRIC OXIDE MEDIATED NEUROVASCULAR COUPLING IN AGING AND ALZHEIMER'S DISEASE. Pathophysiology 2018. [DOI: 10.1016/j.pathophys.2018.07.068] [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: 11/26/2022] Open
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18
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Lourenço CF, Ledo A, Caetano M, Barbosa RM, Laranjinha J. Age-Dependent Impairment of Neurovascular and Neurometabolic Coupling in the Hippocampus. Front Physiol 2018; 9:913. [PMID: 30065657 PMCID: PMC6056650 DOI: 10.3389/fphys.2018.00913] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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: 04/27/2018] [Accepted: 06/21/2018] [Indexed: 11/24/2022] Open
Abstract
Neurovascular and neurometabolic coupling are critical and complex processes underlying brain function. Perturbations in the regulation of these processes are, likely, early dysfunctional alterations in pathological brain aging and age-related neurodegeneration. Evidences support the role of nitric oxide (•NO) as a key messenger both in neurovascular coupling, by signaling from neurons to blood vessels, and in neurometabolic coupling, by modulating O2 utilization by mitochondria. In the present study, we investigated the functionality of neurovascular and neurometabolic coupling in connection to •NO signaling and in association to cognitive performance during aging. For this, we performed in vivo simultaneous measurements of •NO, O2 and cerebral blood flow (CBF) in the hippocampus of F344 rats along chronological age in response to glutamatergic activation and in correlation with cognitive performance. Firstly, it is evidenced the temporal sequence of events upon glutamate stimulation of hippocampal dentate gyrus, encompassing the local and transitory increase of •NO followed by transitory local changes of CBF and pO2. Specifically, the transient increase of •NO is followed by an increase of CBF and biphasic changes of the local pO2. We observed that, although the glutamate-induced •NO dynamics were not significantly affected by aging, the correspondent hemodynamic was progressively diminished accompanying a decline in learning and memory. Noteworthy, in spite of a compromised blood supply, in aged rats we observed an increased ΔpO2 associated to the hemodynamic response, suggestive of a decrease in the global metabolic rate of O2. Furthermore, the impairment in the neurovascular coupling observed along aging in F344 rats was mimicked in young rats by promoting an unbalance in redox status toward oxidation via intracellular generation of superoxide radical. This observation strengthens the idea that oxidative stress may have a critical role in the neurovascular uncoupling underlying brain aging and dysfunction. Overall, data supports an impairment of neurovascular response in connection with cognition decline due to oxidative environment-dependent compromised •NO signaling from neurons to vessels during aging.
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Affiliation(s)
- Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Miguel Caetano
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
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19
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Dias C, Lourenço CF, Barbosa RM, Laranjinha J, Ledo A. Analysis of respiratory capacity in brain tissue preparations: high-resolution respirometry for intact hippocampal slices. Anal Biochem 2018; 551:43-50. [PMID: 29753719 DOI: 10.1016/j.ab.2018.05.010] [Citation(s) in RCA: 8] [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: 01/16/2018] [Revised: 05/02/2018] [Accepted: 05/10/2018] [Indexed: 12/13/2022]
Abstract
The evaluation of mitochondrial function provides the basis for the study of brain bioenergetics. However, analysis of brain mitochondrial respiration has been hindered by the low yield associated with mitochondria isolation procedures. Furthermore, isolating mitochondria or cells results in loss of the inherent complexity of the central nervous system. High-resolution respirometry (HRR), is a valuable tool to study mitochondrial function and has been used in diverse biological preparations ranging from isolated mitochondria to tissue homogenates and permeabilized tissue biopsies. Here we describe a novel methodology for evaluation of mitochondrial respiration using tissue preparations from the central nervous system, namely acute hippocampal slices from rodents, with HRR. By using acute intact hippocampal slices, tissue cytoarchitecture, intercellular communication and connectivity are preserved. Mitochondrial respiration was evaluated by using an adapted substrate-uncoupler-inhibitor titration (SUIT) protocol and the expected responses were observed. This methodology can be used to detect differences in mitochondrial function at the oxidative phosphorylation level and for studies with different brain oxidative substrates in physiological and neuropathological settings, by using a system that better represents the in vivo conditions than isolated mitochondria and/or cells.
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Affiliation(s)
- Cândida Dias
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
| | - Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal.
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20
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Ferreira NR, Ledo A, Laranjinha J, Gerhardt GA, Barbosa RM. Simultaneous measurements of ascorbate and glutamate in vivo in the rat brain using carbon fiber nanocomposite sensors and microbiosensor arrays. Bioelectrochemistry 2018; 121:142-150. [PMID: 29413864 DOI: 10.1016/j.bioelechem.2018.01.009] [Citation(s) in RCA: 28] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/15/2018] [Accepted: 01/19/2018] [Indexed: 11/18/2022]
Abstract
Nanocomposite sensors consisting of carbon fiber microelectrodes modified with Nafion® and carbon nanotubes, and ceramic-based microelectrode biosensor arrays were used to measure ascorbate and glutamate in the brain with high spatial, temporal and chemical resolution. Nanocomposite sensors displayed electrocatalytic properties towards ascorbate oxidation, translated into a negative shift from +0.20V to -0.05V vs. Ag/AgCl, as well as a significant increase (10-fold) of electroactive surface area. The estimated average basal concentration of ascorbate in vivo in the CA1, CA3 and dentate gyrus (DG) sub regions of the hippocampus were 276±60μM (n=10), 183±30μM (n=10) and 133±42μM (n=10), respectively. The glutamate microbiosensor arrays showed a high sensitivity of 5.3±0.8pAμM-1 (n=18), and LOD of 204±32nM (n=10), and t50% response time of 0.9±0.02s (n=6) and high selectivity against major interferents. The simultaneous and real-time measurements of glutamate and ascorbate in the hippocampus of anesthetized rats following local stimulus with KCl or glutamate revealed a dynamic interaction between the two neurochemicals.
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Affiliation(s)
- Nuno R Ferreira
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - João Laranjinha
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Greg A Gerhardt
- Department of Neuroscience, Center for Microelectrode Technology, University of Kentucky, Lexington, USA
| | - Rui M Barbosa
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal.
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21
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Ledo A, Lourenço CF, Laranjinha J, Gerhardt GA, Barbosa RM. Combined in Vivo Amperometric Oximetry and Electrophysiology in a Single Sensor: A Tool for Epilepsy Research. Anal Chem 2017; 89:12383-12390. [DOI: 10.1021/acs.analchem.7b03452] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ana Ledo
- Center
for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
- BrainSense, Limitada, Biocant Park, 3060-197 Cantanhede, Portugal
| | - Cátia F. Lourenço
- Center
for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
| | - João Laranjinha
- Center
for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
- Faculty
of Pharmacy, University of Coimbra, Azinhaga de Santa Coimbra, 3000-548 Coimbra, Portugal
| | - Greg A. Gerhardt
- Center for Microelectrode
Technology, Department of Neuroscience, University of Kentucky Medical Center, Lexington, Kentucky 40536, United States
| | - Rui M. Barbosa
- Center
for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
- Faculty
of Pharmacy, University of Coimbra, Azinhaga de Santa Coimbra, 3000-548 Coimbra, Portugal
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22
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Egea J, Fabregat I, Frapart YM, Ghezzi P, Görlach A, Kietzmann T, Kubaichuk K, Knaus UG, Lopez MG, Olaso-Gonzalez G, Petry A, Schulz R, Vina J, Winyard P, Abbas K, Ademowo OS, Afonso CB, Andreadou I, Antelmann H, Antunes F, Aslan M, Bachschmid MM, Barbosa RM, Belousov V, Berndt C, Bernlohr D, Bertrán E, Bindoli A, Bottari SP, Brito PM, Carrara G, Casas AI, Chatzi A, Chondrogianni N, Conrad M, Cooke MS, Costa JG, Cuadrado A, My-Chan Dang P, De Smet B, Debelec-Butuner B, Dias IHK, Dunn JD, Edson AJ, El Assar M, El-Benna J, Ferdinandy P, Fernandes AS, Fladmark KE, Förstermann U, Giniatullin R, Giricz Z, Görbe A, Griffiths H, Hampl V, Hanf A, Herget J, Hernansanz-Agustín P, Hillion M, Huang J, Ilikay S, Jansen-Dürr P, Jaquet V, Joles JA, Kalyanaraman B, Kaminskyy D, Karbaschi M, Kleanthous M, Klotz LO, Korac B, Korkmaz KS, Koziel R, Kračun D, Krause KH, Křen V, Krieg T, Laranjinha J, Lazou A, Li H, Martínez-Ruiz A, Matsui R, McBean GJ, Meredith SP, Messens J, Miguel V, Mikhed Y, Milisav I, Milković L, Miranda-Vizuete A, Mojović M, Monsalve M, Mouthuy PA, Mulvey J, Münzel T, Muzykantov V, Nguyen ITN, Oelze M, Oliveira NG, Palmeira CM, Papaevgeniou N, Pavićević A, Pedre B, Peyrot F, Phylactides M, Pircalabioru GG, Pitt AR, Poulsen HE, Prieto I, Rigobello MP, Robledinos-Antón N, Rodríguez-Mañas L, Rolo AP, Rousset F, Ruskovska T, Saraiva N, Sasson S, Schröder K, Semen K, Seredenina T, Shakirzyanova A, Smith GL, Soldati T, Sousa BC, Spickett CM, Stancic A, Stasia MJ, Steinbrenner H, Stepanić V, Steven S, Tokatlidis K, Tuncay E, Turan B, Ursini F, Vacek J, Vajnerova O, Valentová K, Van Breusegem F, Varisli L, Veal EA, Yalçın AS, Yelisyeyeva O, Žarković N, Zatloukalová M, Zielonka J, Touyz RM, Papapetropoulos A, Grune T, Lamas S, Schmidt HHHW, Di Lisa F, Daiber A. Corrigendum to "European contribution to the study of ROS: A summary of the findings and prospects for the future from the COST action BM1203 (EU-ROS)" [Redox Biol. 13 (2017) 94-162]. Redox Biol 2017; 14:694-696. [PMID: 29107648 PMCID: PMC5975209 DOI: 10.1016/j.redox.2017.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- J Egea
- Institute Teofilo Hernando, Department of Pharmacology, School of Medicine, Univerisdad Autonoma de Madrid, Spain
| | - I Fabregat
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet, Barcelona, Spain
| | - Y M Frapart
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - P Ghezzi
- Brighton & Sussex Medical School, Brighton, UK
| | - A Görlach
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany; DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - T Kietzmann
- Faculty of Biochemistry and Molecular Medicine, and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - K Kubaichuk
- Faculty of Biochemistry and Molecular Medicine, and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - U G Knaus
- Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland
| | - M G Lopez
- Institute Teofilo Hernando, Department of Pharmacology, School of Medicine, Univerisdad Autonoma de Madrid, Spain
| | | | - A Petry
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany
| | - R Schulz
- Institute of Physiology, JLU Giessen, Giessen, Germany
| | - J Vina
- Department of Physiology, University of Valencia, Spain
| | - P Winyard
- University of Exeter Medical School, St Luke's Campus, Exeter EX1 2LU, UK
| | - K Abbas
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - O S Ademowo
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - C B Afonso
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - I Andreadou
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - H Antelmann
- Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany
| | - F Antunes
- Departamento de Química e Bioquímica and Centro de Química e Bioquímica, Faculdade de Ciências, Portugal
| | - M Aslan
- Department of Medical Biochemistry, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - M M Bachschmid
- Vascular Biology Section & Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - R M Barbosa
- Center for Neurosciences and Cell Biology, University of Coimbra and Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - V Belousov
- Molecular technologies laboratory, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - C Berndt
- Department of Neurology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - D Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota - Twin Cities, USA
| | - E Bertrán
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet, Barcelona, Spain
| | - A Bindoli
- Institute of Neuroscience (CNR), Padova, Italy
| | - S P Bottari
- GETI, Institute for Advanced Biosciences, INSERM U1029, CNRS UMR 5309, Grenoble-Alpes University and Radio-analysis Laboratory, CHU de Grenoble, Grenoble, France
| | - P M Brito
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal; Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - G Carrara
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - A I Casas
- Department of Pharmacology & Personalized Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - A Chatzi
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, UK
| | - N Chondrogianni
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - M Conrad
- Helmholtz Center Munich, Institute of Developmental Genetics, Neuherberg, Germany
| | - M S Cooke
- Helmholtz Center Munich, Institute of Developmental Genetics, Neuherberg, Germany
| | - J G Costa
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal; CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - A Cuadrado
- Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Department of Biochemistry, Faculty of Medicine, Autonomous University of Madrid, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - P My-Chan Dang
- Université Paris Diderot, Sorbonne Paris Cité, INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, Paris, France
| | - B De Smet
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Department of Biomedical Sciences and CNR Institute of Neuroscience, University of Padova, Padova, Italy; Pharmahungary Group, Szeged, Hungary
| | - B Debelec-Butuner
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir 35100, Turkey
| | - I H K Dias
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - J D Dunn
- Department of Biochemistry, Science II, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva-4, Switzerland
| | - A J Edson
- Department of Molecular Biology, University of Bergen, Bergen, Norway
| | - M El Assar
- Fundación para la Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain
| | - J El-Benna
- Université Paris Diderot, Sorbonne Paris Cité, INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, Paris, France
| | - P Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - A S Fernandes
- CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - K E Fladmark
- Department of Molecular Biology, University of Bergen, Bergen, Norway
| | - U Förstermann
- Department of Pharmacology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - R Giniatullin
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Z Giricz
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - A Görbe
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - H Griffiths
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK; Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - V Hampl
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - A Hanf
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - J Herget
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - P Hernansanz-Agustín
- Servicio de Immunología, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain; Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas Alberto Sols, Madrid, Spain
| | - M Hillion
- Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany
| | - J Huang
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - S Ilikay
- Harran University, Arts and Science Faculty, Department of Biology, Cancer Biology Lab, Osmanbey Campus, Sanliurfa, Turkey
| | - P Jansen-Dürr
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - V Jaquet
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - J A Joles
- Department of Nephrology & Hypertension, University Medical Center Utrecht, The Netherlands
| | | | - D Kaminskyy
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - M Karbaschi
- Oxidative Stress Group, Dept. Environmental & Occupational Health, Florida International University, Miami, FL 33199, USA
| | - M Kleanthous
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - L O Klotz
- Institute of Nutrition, Department of Nutrigenomics, Friedrich Schiller University, Jena, Germany
| | - B Korac
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic" and Faculty of Biology, Belgrade, Serbia
| | - K S Korkmaz
- Department of Bioengineering, Cancer Biology Laboratory, Faculty of Engineering, Ege University, Bornova, 35100 Izmir, Turkey
| | - R Koziel
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - D Kračun
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany
| | - K H Krause
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - V Křen
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Videnska 1083, CZ-142 20 Prague, Czech Republic
| | - T Krieg
- Department of Medicine, University of Cambridge, UK
| | - J Laranjinha
- Center for Neurosciences and Cell Biology, University of Coimbra and Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - A Lazou
- School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - H Li
- Department of Pharmacology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - A Martínez-Ruiz
- Servicio de Immunología, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - R Matsui
- Vascular Biology Section & Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - G J McBean
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | - S P Meredith
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - J Messens
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - V Miguel
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Madrid, Spain
| | - Y Mikhed
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - I Milisav
- University of Ljubljana, Faculty of Medicine, Institute of Pathophysiology and Faculty of Health Sciences, Ljubljana, Slovenia
| | - L Milković
- Ruđer Bošković Institute, Division of Molecular Medicine, Zagreb, Croatia
| | - A Miranda-Vizuete
- Instituto de Biomedicina de Sevilla, Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Sevilla, Spain
| | - M Mojović
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - M Monsalve
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid, Spain
| | - P A Mouthuy
- Laboratory for Oxidative Stress, Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - J Mulvey
- Department of Medicine, University of Cambridge, UK
| | - T Münzel
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - V Muzykantov
- Department of Pharmacology, Center for Targeted Therapeutics & Translational Nanomedicine, ITMAT/CTSA Translational Research Center University of Pennsylvania The Perelman School of Medicine, Philadelphia, PA, USA
| | - I T N Nguyen
- Department of Nephrology & Hypertension, University Medical Center Utrecht, The Netherlands
| | - M Oelze
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - N G Oliveira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - C M Palmeira
- Center for Neurosciences & Cell Biology of the University of Coimbra, Coimbra, Portugal; Department of Life Sciences of the Faculty of Sciences & Technology of the University of Coimbra, Coimbra, Portugal
| | - N Papaevgeniou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - A Pavićević
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - B Pedre
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - F Peyrot
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France; ESPE of Paris, Paris Sorbonne University, Paris, France
| | - M Phylactides
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - G G Pircalabioru
- The Research Institute of University of Bucharest, Bucharest, Romania
| | - A R Pitt
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - H E Poulsen
- Laboratory of Clinical Pharmacology, Rigshospitalet, University Hospital Copenhagen, Denmark; Department of Clinical Pharmacology, Bispebjerg Frederiksberg Hospital, University Hospital Copenhagen, Denmark; Department Q7642, Rigshospitalet, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - I Prieto
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid, Spain
| | - M P Rigobello
- Department of Biomedical Sciences, University of Padova, via Ugo Bassi 58/b, 35131 Padova, Italy
| | - N Robledinos-Antón
- Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Department of Biochemistry, Faculty of Medicine, Autonomous University of Madrid, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - L Rodríguez-Mañas
- Fundación para la Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain; Servicio de Geriatría, Hospital Universitario de Getafe, Getafe, Spain
| | - A P Rolo
- Center for Neurosciences & Cell Biology of the University of Coimbra, Coimbra, Portugal; Department of Life Sciences of the Faculty of Sciences & Technology of the University of Coimbra, Coimbra, Portugal
| | - F Rousset
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - T Ruskovska
- Faculty of Medical Sciences, Goce Delcev University, Stip, Republic of Macedonia
| | - N Saraiva
- CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - S Sasson
- Institute for Drug Research, Section of Pharmacology, Diabetes Research Unit, The Hebrew University Faculty of Medicine, Jerusalem, Israel
| | - K Schröder
- Institute for Cardiovascular Physiology, Goethe-University, Frankfurt, Germany; DZHK (German Centre for Cardiovascular Research), partner site Rhine-Main, Mainz, Germany
| | - K Semen
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - T Seredenina
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - A Shakirzyanova
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - G L Smith
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - T Soldati
- Department of Biochemistry, Science II, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva-4, Switzerland
| | - B C Sousa
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - C M Spickett
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - A Stancic
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic" and Faculty of Biology, Belgrade, Serbia
| | - M J Stasia
- Université Grenoble Alpes, CNRS, Grenoble INP, CHU Grenoble Alpes, TIMC-IMAG, F38000 Grenoble, France; CDiReC, Pôle Biologie, CHU de Grenoble, Grenoble F-38043, France
| | - H Steinbrenner
- Institute of Nutrition, Department of Nutrigenomics, Friedrich Schiller University, Jena, Germany
| | - V Stepanić
- Ruđer Bošković Institute, Division of Molecular Medicine, Zagreb, Croatia
| | - S Steven
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - K Tokatlidis
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, UK
| | - E Tuncay
- Department of Biophysics, Ankara University, Faculty of Medicine, 06100 Ankara, Turkey
| | - B Turan
- Department of Biophysics, Ankara University, Faculty of Medicine, 06100 Ankara, Turkey
| | - F Ursini
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - J Vacek
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 3, Olomouc 77515, Czech Republic
| | - O Vajnerova
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - K Valentová
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Videnska 1083, CZ-142 20 Prague, Czech Republic
| | - F Van Breusegem
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - L Varisli
- Harran University, Arts and Science Faculty, Department of Biology, Cancer Biology Lab, Osmanbey Campus, Sanliurfa, Turkey
| | - E A Veal
- Institute for Cell and Molecular Biosciences, and Institute for Ageing, Newcastle University, Framlington Place, Newcastle upon Tyne, UK
| | - A S Yalçın
- Department of Biochemistry, School of Medicine, Marmara University, Istanbul, Turkey
| | - O Yelisyeyeva
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - N Žarković
- Laboratory for Oxidative Stress, Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - M Zatloukalová
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 3, Olomouc 77515, Czech Republic
| | - J Zielonka
- Medical College of Wisconsin, Milwaukee, USA
| | - R M Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, UK
| | - A Papapetropoulos
- Laboratoty of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - T Grune
- German Institute of Human Nutrition, Department of Toxicology, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - S Lamas
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Madrid, Spain
| | - H H H W Schmidt
- Department of Pharmacology & Personalized Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - F Di Lisa
- Department of Biomedical Sciences and CNR Institute of Neuroscience, University of Padova, Padova, Italy.
| | - A Daiber
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany; DZHK (German Centre for Cardiovascular Research), partner site Rhine-Main, Mainz, Germany.
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Egea J, Fabregat I, Frapart YM, Ghezzi P, Görlach A, Kietzmann T, Kubaichuk K, Knaus UG, Lopez MG, Olaso-Gonzalez G, Petry A, Schulz R, Vina J, Winyard P, Abbas K, Ademowo OS, Afonso CB, Andreadou I, Antelmann H, Antunes F, Aslan M, Bachschmid MM, Barbosa RM, Belousov V, Berndt C, Bernlohr D, Bertrán E, Bindoli A, Bottari SP, Brito PM, Carrara G, Casas AI, Chatzi A, Chondrogianni N, Conrad M, Cooke MS, Costa JG, Cuadrado A, My-Chan Dang P, De Smet B, Debelec-Butuner B, Dias IHK, Dunn JD, Edson AJ, El Assar M, El-Benna J, Ferdinandy P, Fernandes AS, Fladmark KE, Förstermann U, Giniatullin R, Giricz Z, Görbe A, Griffiths H, Hampl V, Hanf A, Herget J, Hernansanz-Agustín P, Hillion M, Huang J, Ilikay S, Jansen-Dürr P, Jaquet V, Joles JA, Kalyanaraman B, Kaminskyy D, Karbaschi M, Kleanthous M, Klotz LO, Korac B, Korkmaz KS, Koziel R, Kračun D, Krause KH, Křen V, Krieg T, Laranjinha J, Lazou A, Li H, Martínez-Ruiz A, Matsui R, McBean GJ, Meredith SP, Messens J, Miguel V, Mikhed Y, Milisav I, Milković L, Miranda-Vizuete A, Mojović M, Monsalve M, Mouthuy PA, Mulvey J, Münzel T, Muzykantov V, Nguyen ITN, Oelze M, Oliveira NG, Palmeira CM, Papaevgeniou N, Pavićević A, Pedre B, Peyrot F, Phylactides M, Pircalabioru GG, Pitt AR, Poulsen HE, Prieto I, Rigobello MP, Robledinos-Antón N, Rodríguez-Mañas L, Rolo AP, Rousset F, Ruskovska T, Saraiva N, Sasson S, Schröder K, Semen K, Seredenina T, Shakirzyanova A, Smith GL, Soldati T, Sousa BC, Spickett CM, Stancic A, Stasia MJ, Steinbrenner H, Stepanić V, Steven S, Tokatlidis K, Tuncay E, Turan B, Ursini F, Vacek J, Vajnerova O, Valentová K, Van Breusegem F, Varisli L, Veal EA, Yalçın AS, Yelisyeyeva O, Žarković N, Zatloukalová M, Zielonka J, Touyz RM, Papapetropoulos A, Grune T, Lamas S, Schmidt HHHW, Di Lisa F, Daiber A. European contribution to the study of ROS: A summary of the findings and prospects for the future from the COST action BM1203 (EU-ROS). Redox Biol 2017; 13:94-162. [PMID: 28577489 PMCID: PMC5458069 DOI: 10.1016/j.redox.2017.05.007] [Citation(s) in RCA: 202] [Impact Index Per Article: 28.9] [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] [Received: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 12/12/2022] Open
Abstract
The European Cooperation in Science and Technology (COST) provides an ideal framework to establish multi-disciplinary research networks. COST Action BM1203 (EU-ROS) represents a consortium of researchers from different disciplines who are dedicated to providing new insights and tools for better understanding redox biology and medicine and, in the long run, to finding new therapeutic strategies to target dysregulated redox processes in various diseases. This report highlights the major achievements of EU-ROS as well as research updates and new perspectives arising from its members. The EU-ROS consortium comprised more than 140 active members who worked together for four years on the topics briefly described below. The formation of reactive oxygen and nitrogen species (RONS) is an established hallmark of our aerobic environment and metabolism but RONS also act as messengers via redox regulation of essential cellular processes. The fact that many diseases have been found to be associated with oxidative stress established the theory of oxidative stress as a trigger of diseases that can be corrected by antioxidant therapy. However, while experimental studies support this thesis, clinical studies still generate controversial results, due to complex pathophysiology of oxidative stress in humans. For future improvement of antioxidant therapy and better understanding of redox-associated disease progression detailed knowledge on the sources and targets of RONS formation and discrimination of their detrimental or beneficial roles is required. In order to advance this important area of biology and medicine, highly synergistic approaches combining a variety of diverse and contrasting disciplines are needed.
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Affiliation(s)
- Javier Egea
- Institute Teofilo Hernando, Department of Pharmacology, School of Medicine. Univerisdad Autonoma de Madrid, Spain
| | - Isabel Fabregat
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet, Barcelona, Spain
| | - Yves M Frapart
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | | | - Agnes Görlach
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany; DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Thomas Kietzmann
- Faculty of Biochemistry and Molecular Medicine, and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Kateryna Kubaichuk
- Faculty of Biochemistry and Molecular Medicine, and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Ulla G Knaus
- Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland
| | - Manuela G Lopez
- Institute Teofilo Hernando, Department of Pharmacology, School of Medicine. Univerisdad Autonoma de Madrid, Spain
| | | | - Andreas Petry
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany
| | - Rainer Schulz
- Institute of Physiology, JLU Giessen, Giessen, Germany
| | - Jose Vina
- Department of Physiology, University of Valencia, Spain
| | - Paul Winyard
- University of Exeter Medical School, St Luke's Campus, Exeter EX1 2LU, UK
| | - Kahina Abbas
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Opeyemi S Ademowo
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Catarina B Afonso
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Ioanna Andreadou
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - Haike Antelmann
- Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany
| | - Fernando Antunes
- Departamento de Química e Bioquímica and Centro de Química e Bioquímica, Faculdade de Ciências, Portugal
| | - Mutay Aslan
- Department of Medical Biochemistry, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Markus M Bachschmid
- Vascular Biology Section & Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - Rui M Barbosa
- Center for Neurosciences and Cell Biology, University of Coimbra and Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Vsevolod Belousov
- Molecular technologies laboratory, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Carsten Berndt
- Department of Neurology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - David Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota - Twin Cities, USA
| | - Esther Bertrán
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet, Barcelona, Spain
| | | | - Serge P Bottari
- GETI, Institute for Advanced Biosciences, INSERM U1029, CNRS UMR 5309, Grenoble-Alpes University and Radio-analysis Laboratory, CHU de Grenoble, Grenoble, France
| | - Paula M Brito
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal; Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - Guia Carrara
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Ana I Casas
- Department of Pharmacology & Personalized Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Afroditi Chatzi
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, UK
| | - Niki Chondrogianni
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Marcus Conrad
- Helmholtz Center Munich, Institute of Developmental Genetics, Neuherberg, Germany
| | - Marcus S Cooke
- Oxidative Stress Group, Dept. Environmental & Occupational Health, Florida International University, Miami, FL 33199, USA
| | - João G Costa
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal; CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - Antonio Cuadrado
- Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Department of Biochemistry, Faculty of Medicine, Autonomous University of Madrid. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Pham My-Chan Dang
- Université Paris Diderot, Sorbonne Paris Cité, INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, Paris, France
| | - Barbara De Smet
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Department of Biomedical Sciences and CNR Institute of Neuroscience, University of Padova, Padova, Italy; Pharmahungary Group, Szeged, Hungary
| | - Bilge Debelec-Butuner
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir 35100, Turkey
| | - Irundika H K Dias
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Joe Dan Dunn
- Department of Biochemistry, Science II, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva-4, Switzerland
| | - Amanda J Edson
- Department of Molecular Biology, University of Bergen, Bergen, Norway
| | - Mariam El Assar
- Fundación para la Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain
| | - Jamel El-Benna
- Université Paris Diderot, Sorbonne Paris Cité, INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, Paris, France
| | - Péter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Ana S Fernandes
- CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - Kari E Fladmark
- Department of Molecular Biology, University of Bergen, Bergen, Norway
| | - Ulrich Förstermann
- Department of Pharmacology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Rashid Giniatullin
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Zoltán Giricz
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Anikó Görbe
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Helen Griffiths
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK; Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - Vaclav Hampl
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Alina Hanf
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Jan Herget
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Pablo Hernansanz-Agustín
- Servicio de Immunología, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain; Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas Alberto Sols, Madrid, Spain
| | - Melanie Hillion
- Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany
| | - Jingjing Huang
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Serap Ilikay
- Harran University, Arts and Science Faculty, Department of Biology, Cancer Biology Lab, Osmanbey Campus, Sanliurfa, Turkey
| | - Pidder Jansen-Dürr
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Vincent Jaquet
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Jaap A Joles
- Department of Nephrology & Hypertension, University Medical Center Utrecht, The Netherlands
| | | | | | - Mahsa Karbaschi
- Oxidative Stress Group, Dept. Environmental & Occupational Health, Florida International University, Miami, FL 33199, USA
| | - Marina Kleanthous
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Lars-Oliver Klotz
- Institute of Nutrition, Department of Nutrigenomics, Friedrich Schiller University, Jena, Germany
| | - Bato Korac
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic" and Faculty of Biology, Belgrade, Serbia
| | - Kemal Sami Korkmaz
- Department of Bioengineering, Cancer Biology Laboratory, Faculty of Engineering, Ege University, Bornova, 35100 Izmir, Turkey
| | - Rafal Koziel
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Damir Kračun
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany
| | - Karl-Heinz Krause
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Vladimír Křen
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Videnska 1083, CZ-142 20 Prague, Czech Republic
| | - Thomas Krieg
- Department of Medicine, University of Cambridge, UK
| | - João Laranjinha
- Center for Neurosciences and Cell Biology, University of Coimbra and Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Antigone Lazou
- School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Huige Li
- Department of Pharmacology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Antonio Martínez-Ruiz
- Servicio de Immunología, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Reiko Matsui
- Vascular Biology Section & Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - Gethin J McBean
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | - Stuart P Meredith
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Joris Messens
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Verónica Miguel
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Madrid, Spain
| | - Yuliya Mikhed
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Irina Milisav
- University of Ljubljana, Faculty of Medicine, Institute of Pathophysiology and Faculty of Health Sciences, Ljubljana, Slovenia
| | - Lidija Milković
- Ruđer Bošković Institute, Division of Molecular Medicine, Zagreb, Croatia
| | - Antonio Miranda-Vizuete
- Instituto de Biomedicina de Sevilla, Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Sevilla, Spain
| | - Miloš Mojović
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - María Monsalve
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid, Spain
| | - Pierre-Alexis Mouthuy
- Laboratory for Oxidative Stress, Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - John Mulvey
- Department of Medicine, University of Cambridge, UK
| | - Thomas Münzel
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Vladimir Muzykantov
- Department of Pharmacology, Center for Targeted Therapeutics & Translational Nanomedicine, ITMAT/CTSA Translational Research Center University of Pennsylvania The Perelman School of Medicine, Philadelphia, PA, USA
| | - Isabel T N Nguyen
- Department of Nephrology & Hypertension, University Medical Center Utrecht, The Netherlands
| | - Matthias Oelze
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Nuno G Oliveira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Carlos M Palmeira
- Center for Neurosciences & Cell Biology of the University of Coimbra, Coimbra, Portugal; Department of Life Sciences of the Faculty of Sciences & Technology of the University of Coimbra, Coimbra, Portugal
| | - Nikoletta Papaevgeniou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Aleksandra Pavićević
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - Brandán Pedre
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Fabienne Peyrot
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France; ESPE of Paris, Paris Sorbonne University, Paris, France
| | - Marios Phylactides
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - Andrew R Pitt
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Henrik E Poulsen
- Laboratory of Clinical Pharmacology, Rigshospitalet, University Hospital Copenhagen, Denmark; Department of Clinical Pharmacology, Bispebjerg Frederiksberg Hospital, University Hospital Copenhagen, Denmark; Department Q7642, Rigshospitalet, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - Ignacio Prieto
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid, Spain
| | - Maria Pia Rigobello
- Department of Biomedical Sciences, University of Padova, via Ugo Bassi 58/b, 35131 Padova, Italy
| | - Natalia Robledinos-Antón
- Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Department of Biochemistry, Faculty of Medicine, Autonomous University of Madrid. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Leocadio Rodríguez-Mañas
- Fundación para la Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain; Servicio de Geriatría, Hospital Universitario de Getafe, Getafe, Spain
| | - Anabela P Rolo
- Center for Neurosciences & Cell Biology of the University of Coimbra, Coimbra, Portugal; Department of Life Sciences of the Faculty of Sciences & Technology of the University of Coimbra, Coimbra, Portugal
| | - Francis Rousset
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Tatjana Ruskovska
- Faculty of Medical Sciences, Goce Delcev University, Stip, Republic of Macedonia
| | - Nuno Saraiva
- CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - Shlomo Sasson
- Institute for Drug Research, Section of Pharmacology, Diabetes Research Unit, The Hebrew University Faculty of Medicine, Jerusalem, Israel
| | - Katrin Schröder
- Institute for Cardiovascular Physiology, Goethe-University, Frankfurt, Germany; DZHK (German Centre for Cardiovascular Research), partner site Rhine-Main, Mainz, Germany
| | - Khrystyna Semen
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Tamara Seredenina
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Anastasia Shakirzyanova
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | | | - Thierry Soldati
- Department of Biochemistry, Science II, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva-4, Switzerland
| | - Bebiana C Sousa
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Corinne M Spickett
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Ana Stancic
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic" and Faculty of Biology, Belgrade, Serbia
| | - Marie José Stasia
- Université Grenoble Alpes, CNRS, Grenoble INP, CHU Grenoble Alpes, TIMC-IMAG, F38000 Grenoble, France; CDiReC, Pôle Biologie, CHU de Grenoble, Grenoble, F-38043, France
| | - Holger Steinbrenner
- Institute of Nutrition, Department of Nutrigenomics, Friedrich Schiller University, Jena, Germany
| | - Višnja Stepanić
- Ruđer Bošković Institute, Division of Molecular Medicine, Zagreb, Croatia
| | - Sebastian Steven
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Kostas Tokatlidis
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, UK
| | - Erkan Tuncay
- Department of Biophysics, Ankara University, Faculty of Medicine, 06100 Ankara, Turkey
| | - Belma Turan
- Department of Biophysics, Ankara University, Faculty of Medicine, 06100 Ankara, Turkey
| | - Fulvio Ursini
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Jan Vacek
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 3, Olomouc 77515, Czech Republic
| | - Olga Vajnerova
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Kateřina Valentová
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Videnska 1083, CZ-142 20 Prague, Czech Republic
| | - Frank Van Breusegem
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Lokman Varisli
- Harran University, Arts and Science Faculty, Department of Biology, Cancer Biology Lab, Osmanbey Campus, Sanliurfa, Turkey
| | - Elizabeth A Veal
- Institute for Cell and Molecular Biosciences, and Institute for Ageing, Newcastle University, Framlington Place, Newcastle upon Tyne, UK
| | - A Suha Yalçın
- Department of Biochemistry, School of Medicine, Marmara University, İstanbul, Turkey
| | | | - Neven Žarković
- Laboratory for Oxidative Stress, Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - Martina Zatloukalová
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 3, Olomouc 77515, Czech Republic
| | | | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, UK
| | - Andreas Papapetropoulos
- Laboratoty of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - Tilman Grune
- German Institute of Human Nutrition, Department of Toxicology, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Santiago Lamas
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Madrid, Spain
| | - Harald H H W Schmidt
- Department of Pharmacology & Personalized Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Fabio Di Lisa
- Department of Biomedical Sciences and CNR Institute of Neuroscience, University of Padova, Padova, Italy.
| | - Andreas Daiber
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany; DZHK (German Centre for Cardiovascular Research), partner site Rhine-Main, Mainz, Germany.
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24
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Lourenço CF, Ledo A, Gerhardt GA, Laranjinha J, Barbosa RM. Neurometabolic and electrophysiological changes during cortical spreading depolarization: multimodal approach based on a lactate-glucose dual microbiosensor arrays. Sci Rep 2017; 7:6764. [PMID: 28754993 PMCID: PMC5533760 DOI: 10.1038/s41598-017-07119-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 06/21/2017] [Indexed: 12/24/2022] Open
Abstract
Spreading depolarization (SD) is a slow propagating wave of strong depolarization of neural cells, implicated in several neuropathological conditions. The breakdown of brain homeostasis promotes significant hemodynamic and metabolic alterations, which impacts on neuronal function. In this work we aimed to develop an innovative multimodal approach, encompassing metabolic, electric and hemodynamic measurements, tailored but not limited to study SD. This was based on a novel dual-biosensor based on microelectrode arrays designed to simultaneously monitor lactate and glucose fluctuations and ongoing neuronal activity with high spatial and temporal resolution. In vitro evaluation of dual lactate-glucose microbiosensor revealed an extended linear range, high sensitivity and selectivity, fast response time and low oxygen-, temperature- and pH- dependencies. In anesthetized rats, we measured with the same array a significant drop in glucose concentration matched to a rise in lactate and concurrently with pronounced changes in the spectral profile of LFP-related currents during episodes of mechanically-evoked SD. This occurred along with the stereotypical hemodynamic response of the SD wave. Overall, this multimodal approach successfully demonstrates the capability to monitor metabolic alterations and ongoing electrical activity, thus contributing to a better understanding of the metabolic changes occurring in the brain following SD.
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Affiliation(s)
- Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Greg A Gerhardt
- Center for Microelectrode Technology, University of Kentucky, Lexington, USA
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal. .,Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.
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25
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Lourenço CF, Ledo A, Barbosa RM, Laranjinha J. Neurovascular-neuroenergetic coupling axis in the brain: master regulation by nitric oxide and consequences in aging and neurodegeneration. Free Radic Biol Med 2017; 108:668-682. [PMID: 28435052 DOI: 10.1016/j.freeradbiomed.2017.04.026] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 02/21/2017] [Accepted: 04/18/2017] [Indexed: 02/08/2023]
Abstract
The strict energetic demands of the brain require that nutrient supply and usage be fine-tuned in accordance with the specific temporal and spatial patterns of ever-changing levels of neuronal activity. This is achieved by adjusting local cerebral blood flow (CBF) as a function of activity level - neurovascular coupling - and by changing how energy substrates are metabolized and shuttled amongst astrocytes and neurons - neuroenergetic coupling. Both activity-dependent increase of CBF and O2 and glucose utilization by active neural cells are inextricably linked, establishing a functional metabolic axis in the brain, the neurovascular-neuroenergetic coupling axis. This axis incorporates and links previously independent processes that need to be coordinated in the normal brain. We here review evidence supporting the role of neuronal-derived nitric oxide (•NO) as the master regulator of this axis. Nitric oxide is produced in tight association with glutamatergic activation and, diffusing several cell diameters, may interact with different molecular targets within each cell type. Hemeproteins such as soluble guanylate cyclase, cytochrome c oxidase and hemoglobin, with which •NO reacts at relatively fast rates, are but a few of the key in determinants of the regulatory role of •NO in the neurovascular-neuroenergetic coupling axis. Accordingly, critical literature supporting this concept is discussed. Moreover, in view of the controversy regarding the regulation of catabolism of different neural cells, we further discuss key aspects of the pathways through which •NO specifically up-regulates glycolysis in astrocytes, supporting lactate shuttling to neurons for oxidative breakdown. From a biomedical viewpoint, derailment of neurovascular-neuroenergetic axis is precociously linked to aberrant brain aging, cognitive impairment and neurodegeneration. Thus, we summarize current knowledge of how both neurovascular and neuroenergetic coupling are compromised in aging, traumatic brain injury, epilepsy and age-associated neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease, suggesting that a shift in cellular redox balance may contribute to divert •NO bioactivity from regulation to dysfunction.
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Affiliation(s)
- Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.
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26
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Lourenço CF, Ledo A, Barbosa RM, Laranjinha J. Neurovascular uncoupling in the triple transgenic model of Alzheimer's disease: Impaired cerebral blood flow response to neuronal-derived nitric oxide signaling. Exp Neurol 2017; 291:36-43. [PMID: 28161255 DOI: 10.1016/j.expneurol.2017.01.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 01/05/2017] [Accepted: 01/27/2017] [Indexed: 11/16/2022]
Abstract
Nitric oxide (NO)-dependent pathways and cerebrovascular dysfunction have been shown to contribute to the cognitive decline and neurodegeneration observed in Alzheimer's disease (AD) but whether they represent initial factors or later changes of the disease is still a matter of debate. In this work, we aimed at investigating whether and to what extent neuronal-derived NO signaling and related neurovascular coupling are impaired along aging in the hippocampus of the triple transgenic mouse model of Alzheimer's Disease (3xTg-AD). We performed a longitudinal study combining behavior studies, in vivo simultaneous measurements of NO concentration gradients and cerebral blood flow (CBF), along with detection of NO synthase (NOS) and markers of nitroxidative stress. Our results revealed an impairment in the neurovascular coupling along aging in the 3xTg-AD mice which preceded obvious cognitive decline. This impairment was characterized by diminished CBF changes in response to normal or even increased NO signals and associated with markers of nitroxidative stress. The results suggest that impairment in neurovascular coupling is primarily due to cerebrovascular dysfunction, rather than due to dysfunctional NO signaling from neurons to blood vessels. Overall, this work supports cerebrovascular dysfunction as a fundamental underlying process in AD pathology.
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Affiliation(s)
- Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal.
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.
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27
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Ledo A, Lourenço CF, Laranjinha J, Brett CMA, Gerhardt GA, Barbosa RM. Ceramic-Based Multisite Platinum Microelectrode Arrays: Morphological Characteristics and Electrochemical Performance for Extracellular Oxygen Measurements in Brain Tissue. Anal Chem 2017; 89:1674-1683. [DOI: 10.1021/acs.analchem.6b03772] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ana Ledo
- Center
for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal
| | - Cátia F. Lourenço
- Center
for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal
| | - João Laranjinha
- Center
for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal
- Faculty
of Pharmacy, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - Christopher M. A. Brett
- Department
of Chemistry, Faculty of Sciences and Technology, University of Coimbra, 3004-535, Coimbra, Portugal
| | - Greg A. Gerhardt
- Center
for Microelectrode Technology (CenMeT), Department of Neuroscience, University of Kentucky Medical Center, Lexington, Kentucky 40536, United States
| | - Rui M. Barbosa
- Center
for Neuroscience and Cell Biology, University of Coimbra, 3004-504, Coimbra, Portugal
- Faculty
of Pharmacy, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
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28
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Rocha BS, Nunes C, Laranjinha J. Tuning constitutive and pathological inflammation in the gut via the interaction of dietary nitrate and polyphenols with host microbiome. Int J Biochem Cell Biol 2016; 81:393-402. [PMID: 27989963 DOI: 10.1016/j.biocel.2016.10.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/22/2016] [Accepted: 10/26/2016] [Indexed: 02/08/2023]
Abstract
Chronic inflammation is currently recognized as a critical process in modern-era epidemics such as diabetes, obesity and neurodegeneration. However, little attention is paid to the constitutive inflammatory pathways that operate in the gut and that are mandatory for local welfare and the prevention of such multi-organic diseases. Hence, the digestive system, while posing as a barrier between the external environment and the host, is crucial for the balance between constitutive and pathological inflammatory events. Gut microbiome, a recently discovered organ, is now known to govern the interaction between exogenous agents and the host with ensued impact on local and systemic homeostasis. Whereas gut microbiota may be modulated by a myriad of factors, diet constitutes one of its major determinants. Thus, dietary compounds that influence microbial flora may thereby impact on inflammatory pathways. One such example is the redox environment in the gut lumen which is highly dependent on the local generation of nitric oxide along the nitrate-nitrite-nitric oxide pathway and that is further enhanced by simultaneous consumption of polyphenols. In this paper, different pathways encompassing the interaction of dietary nitrate and polyphenols with gut microbiota will be presented and discussed in connection with local and systemic inflammatory events. Furthermore, it will be discussed how these interactive cycles (nitrate-polyphenols-microbiome) may pose as novel strategies to tackle inflammatory diseases.
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Affiliation(s)
- Bárbara S Rocha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Carla Nunes
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
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29
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Abstract
The clinical implications of the nitrate-nitrite-nitric oxide pathway have been extensively studied in recent years. However, the physiological impact of bioactive nitrogen oxides produced from dietary nitrate has remained largely elusive. Here, we report a hitherto unrecognized nitrite-dependent nitrating pathway that targets tight junction proteins in the stomach. Inorganic nitrate, nitrite or saliva obtained after the consumption of lettuce were administered by oral gavage to Wistar rats. The enterosalivary circulation of nitrate was allowed to occur for 4 h after which the animals were euthanized and the stomach collected. Nitrated occludin was detected by immunoprecipitation in the gastric epithelium upon inorganic nitrite administration (p < .05) but was not observed in the case of inorganic nitrate or human saliva administration. This observation, along with differences in •NO production rates from inorganic and salivary nitrite under simulated gastric conditions, suggests that competing reactions at acidic pH determine the production of nitrating agents (•NO2) or other, more stable, oxides. Accordingly, it is shown in vitro that salivary nitrite yields higher steady state concentrations of •NO (0.37 ± 0.01 μM) than sodium nitrite (0.12 ± 0.03 μM). Dietary-dependent reactions involving the production of nitrogen oxides should be further investigated as, in the context of occludin nitration, the consumption of green leafy vegetables (with high nitrate content), if able to modulate gut barrier function, may have important implications in the context of leaky gut disorders.
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Affiliation(s)
- Bárbara S Rocha
- a Faculty of Pharmacy , University of Coimbra , Coimbra , Portugal.,b Center for Neurosciences and Cell Biology , University of Coimbra , Coimbra , Portugal
| | - Mariana G Correia
- b Center for Neurosciences and Cell Biology , University of Coimbra , Coimbra , Portugal
| | - Rita C Fernandes
- a Faculty of Pharmacy , University of Coimbra , Coimbra , Portugal
| | - João S Gonçalves
- a Faculty of Pharmacy , University of Coimbra , Coimbra , Portugal
| | - João Laranjinha
- a Faculty of Pharmacy , University of Coimbra , Coimbra , Portugal.,b Center for Neurosciences and Cell Biology , University of Coimbra , Coimbra , Portugal
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Rocha BS, Lundberg JO, Radi R, Laranjinha J. Role of nitrite, urate and pepsin in the gastroprotective effects of saliva. Redox Biol 2016; 8:407-14. [PMID: 27156250 PMCID: PMC4864375 DOI: 10.1016/j.redox.2016.04.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 02/08/2016] [Revised: 03/30/2016] [Accepted: 04/06/2016] [Indexed: 12/12/2022] Open
Abstract
Dietary nitrate is now recognized as an alternative substrate for nitric oxide (•NO) production in the gut. This novel pathway implies the sequential reduction of nitrate to nitrite, •NO and other bioactive nitrogen oxides but the physiological relevance of these oxidants has remained elusive. We have previously shown that dietary nitrite fuels an hitherto unrecognized nitrating pathway at acidic gastric pH, through which pepsinogen is nitrated in the gastric mucosa, yielding a less active form of pepsin in vitro. Here, we demonstrate that pepsin is nitrated in vivo and explore the functional impact of protein nitration by means of peptic ulcer development. Upon administration of pentagastrin and human nitrite-rich saliva or sodium nitrite to rats, nitrated pepsin was detected in the animal's stomach by immunoprecipitation. •NO was measured in the gastric headspace before and after nitrite instillation by chemiluminescence. At the end of each procedure, the stomach's lesions, ranging from gastric erosions to haemorrhagic ulcers, were scored. Nitrite increased gastric •NO by 200-fold (p<0.05) and nitrated pepsin was detected both in the gastric juice and the mucosa (p<0.05). Exogenous urate, a scavenger of nitrogen dioxide radical, blunted •NO detection and inhibited pepsin nitration, suggesting an underlining free radical-dependent mechanism for nitration. Functionally, pepsin nitration prevented the development of gastric ulcers, as the lesions were only apparent when pepsin nitration was inhibited by urate. In sum, this work unravels a novel dietary-dependent nitrating pathway in which pepsin is nitrated and inactivated in the stomach, preventing the progression of gastric ulcers. The nitrate-nitrite-nitric oxide pathway promotes gastric protein nitration. Pepsin is nitrated by dietary nitrite through the production of ∙NO2. Nitrated pepsin prevents the development of acute peptic ulcers.
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Affiliation(s)
- Bárbara S Rocha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Rafael Radi
- Departamento de Bioquímica, Facultad de Medicina, Universidad de La República, Montevideo, Uruguay; Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de La República, Montevideo, Uruguay
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
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Nunes C, Teixeira N, Serra D, Freitas V, Almeida L, Laranjinha J. Red wine polyphenol extract efficiently protects intestinal epithelial cells from inflammation via opposite modulation of JAK/STAT and Nrf2 pathways. Toxicol Res (Camb) 2016; 5:53-65. [PMID: 30090326 PMCID: PMC6061778 DOI: 10.1039/c5tx00214a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 10/01/2015] [Indexed: 12/17/2022] Open
Abstract
The development of therapeutic approaches combining efficacy and safety represents an important goal in intestinal inflammation research. Recently, evidence has supported dietary polyphenols as useful tools in the treatment and prevention of chronic inflammatory diseases, but the mechanisms of action are still poorly understood. We here reveal molecular mechanisms underlying the anti-inflammatory action of a non-alcoholic polyphenol red wine extract (RWE), operating at complementary levels via the Janus kinase/signal transducer and activator of transcription (JAK/STAT) and Nuclear factor-erythroid 2-related factor-2 (Nrf2) pathways. RWE significantly reduced the nuclear levels of phosphorylated STAT1 and also the cellular levels of phosphorylated JAK1 induced by cytokines, suppressing the JAK/STAT inflammatory signalling cascade. In turn, RWE increased the Nrf2 nuclear level, activating the Nrf2 pathway, leading not only to an up-regulation of the heme oxygenase-1 (HO-1) expression but also to an increase of the glutamate-cysteine ligase subunit catalytic (GCLc) gene expression, enhancing the GSH synthesis, thereby counteracting GSH depletion that occurs under inflammatory conditions. Overall, data indicate that the anti-inflammatory action of RWE is exerted at complementary levels, via suppression of the JAK/STAT inflammatory pathway and positive modulation of the activity of Nrf2. These results point to the potential use of the RWE as an efficient, readily available and inexpensive therapeutic strategy in the context of gastrointestinal inflammation.
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Affiliation(s)
- Carla Nunes
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
| | - Natércia Teixeira
- Department of Chemistry , Faculty of Sciences , University of Porto , Portugal
| | - Diana Serra
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
| | - Víctor Freitas
- Department of Chemistry , Faculty of Sciences , University of Porto , Portugal
| | - Leonor Almeida
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
| | - João Laranjinha
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy , University of Coimbra , Health Sciences Campus , Azinhaga de Santa Comba , 3000-548 Coimbra , Portugal .
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Santos RM, Lourenço CF, Gerhardt GA, Cadenas E, Laranjinha J, Barbosa RM. Corrigendum to “Evidence for a pathway that facilitates nitric oxide diffusion in the brain” [Neurochem. Int. 59 (2011) 90–96]. Neurochem Int 2015. [DOI: 10.1016/j.neuint.2015.11.004] [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: 12/01/2022]
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Lourenço CF, Ledo A, Dias C, Barbosa RM, Laranjinha J. Neurovascular and neurometabolic derailment in aging and Alzheimer's disease. Front Aging Neurosci 2015; 7:103. [PMID: 26074816 PMCID: PMC4445047 DOI: 10.3389/fnagi.2015.00103] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 05/13/2015] [Indexed: 12/17/2022] Open
Abstract
The functional and structural integrity of the brain requires local adjustment of blood flow and regulated delivery of metabolic substrates to meet the metabolic demands imposed by neuronal activation. This process—neurovascular coupling—and ensued alterations of glucose and oxygen metabolism—neurometabolic coupling—are accomplished by concerted communication between neural and vascular cells. Evidence suggests that neuronal-derived nitric oxide (•NO) is a key player in both phenomena. Alterations in the mechanisms underlying the intimate communication between neural cells and vessels ultimately lead to neuronal dysfunction. Both neurovascular and neurometabolic coupling are perturbed during brain aging and in age-related neuropathologies in close association with cognitive decline. However, despite decades of intense investigation, many aspects remain poorly understood, such as the impact of these alterations. In this review, we address neurovascular and neurometabolic derailment in aging and Alzheimer's disease (AD), discussing its significance in connection with •NO-related pathways.
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Affiliation(s)
- Cátia F Lourenço
- Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Ana Ledo
- Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Cândida Dias
- Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal ; Faculty of Pharmacy, University of Coimbra Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal ; Faculty of Pharmacy, University of Coimbra Coimbra, Portugal
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Rocha BS, Gago B, Barbosa RM, Cavaleiro C, Laranjinha J. Ethyl nitrite is produced in the human stomach from dietary nitrate and ethanol, releasing nitric oxide at physiological pH: potential impact on gastric motility. Free Radic Biol Med 2015; 82:160-6. [PMID: 25645954 DOI: 10.1016/j.freeradbiomed.2015.01.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 01/12/2015] [Accepted: 01/13/2015] [Indexed: 02/01/2023]
Abstract
BACKGROUND Nitric oxide ((∙)NO), a ubiquitous molecule involved in a plethora of signaling pathways, is produced from dietary nitrate in the gut through the so-called nitrate-nitrite-NO pathway. In the stomach, nitrite derived from dietary nitrate triggers a network of chemical reactions targeting endogenous and exogenous biomolecules, thereby producing new compounds with physiological activity. OBJECTIVE The aim of this study was to ascertain whether compounds with physiological relevance are produced in the stomach upon consumption of nitrate- and ethanol-rich foods. DESIGN Human volunteers consumed a serving of lettuce (source of nitrate) and alcoholic beverages (source of ethanol). After 15 min, samples of the gastric headspace were collected and ethyl nitrite was identified by GC-MS. Wistar rats were used to study the impact of ethyl nitrite on gastric smooth muscle relaxation at physiological pH. RESULT Nitrogen oxides, produced from nitrite in the stomach, induce nitrosation of ethanol from alcoholic beverages in the human stomach yielding ethyl nitrite. Ethyl nitrite, a potent vasodilator, is produced in vivo upon the consumption of lettuce with either red wine or whisky. Moreover, at physiological pH, ethyl nitrite induces gastric smooth muscle relaxation through a cGMP-dependent pathway. Overall, these results suggest that ethyl nitrite is produced in the gastric lumen and releases (∙)NO at physiological pH, which ultimately may have an impact on gastric motility. Systemic effects may also be expected if ethyl nitrite diffuses through the gastric mucosa reaching blood vessels, therefore operating as a (∙)NO carrier throughout the body. CONCLUSION These data pinpoint posttranslational modifications as an underappreciated mechanism for the production of novel molecules with physiological impact locally in the gut and highlight the notion that diet may fuel compounds with the potential to modulate gastrointestinal welfare.
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Affiliation(s)
- Bárbara S Rocha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Bruno Gago
- Department of Health Sciences, University of Aveiro, Aveiro, Portugal
| | - Rui M Barbosa
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Carlos Cavaleiro
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, 3000-548 Coimbra, Portugal
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, 3000-548 Coimbra, Portugal.
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Ferreira NR, Lourenço C, Barbosa RM, Laranjinha J. Coupling of ascorbate and nitric oxide dynamics in vivo in the rat hippocampus upon glutamatergic neuronal stimulation: A novel functional interplay. Brain Res Bull 2015; 114:13-9. [DOI: 10.1016/j.brainresbull.2015.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 02/09/2015] [Accepted: 03/07/2015] [Indexed: 01/01/2023]
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Rocha BS, Nunes C, Pereira C, Barbosa RM, Laranjinha J. A shortcut to wide-ranging biological actions of dietary polyphenols: modulation of the nitrate-nitrite-nitric oxide pathway in the gut. Food Funct 2015; 5:1646-52. [PMID: 24912104 DOI: 10.1039/c4fo00124a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Dietary polyphenols are complex, natural compounds with recognized health benefits. Initially attractive to the biomedical area due to their in vitro antioxidant properties, the biological implications of polyphenols are now known to be far from their acute ability to scavenge free radicals but rather to modulate redox signaling pathways. Actually, it is now recognized that dietary polyphenols are extensively metabolized in vivo and that the chemical, biophysical and biological properties of their metabolites are, in most cases, quite different from the ones of the parent molecules. Hence, the study of the metabolic, absorptive and signaling pathways of both phenolics and derivatives has become a major issue. In this paper we propose a short-cut for the systemic effects of polyphenols in connection with nitric oxide (˙NO) biology. This free radical is a ubiquitous signaling molecule with pivotal functions in vivo. It is produced through an enzymatic pathway and also through the reduction of dietary nitrate and nitrite in the human stomach. At acidic gastric pH, dietary polyphenols, in the form they are conveyed in foods and at high concentration, not only promote nitrite reduction to ˙NO but also embark in a complex network of chemical reactions to produce higher nitrogen oxides with signaling functions, namely by inducing post-translational modifications. Modified endogenous molecules, such as nitrated proteins and lipids, acquire important physiological functions. Thus, local and systemic effects of ˙NO such as modulation of vascular tone, mucus production in the gut and protection against ischemia-reperfusion injury are, in this sense, triggered by dietary polyphenols. Evidence to support the signaling and biological effects of polyphenols by modulation of the nitrate-nitrite-NO pathway will be herein provided and discussed. General actions of polyphenols encompassing absorption and metabolism in the intestine/liver are short-cut via the production of diffusible species in the stomach that have not only a local but also a general impact.
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Affiliation(s)
- Bárbara S Rocha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
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Pereira C, Barbosa RM, Laranjinha J. Dietary nitrite induces nitrosation of the gastric mucosa: the protective action of the mucus and the modulatory effect of red wine. J Nutr Biochem 2015; 26:476-83. [PMID: 25701398 DOI: 10.1016/j.jnutbio.2014.12.004] [Citation(s) in RCA: 10] [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: 07/09/2014] [Revised: 12/01/2014] [Accepted: 12/02/2014] [Indexed: 12/13/2022]
Abstract
The stomach chemical environment promotes the production of new molecules that can induce post-translational modifications of endogenous proteins with physiological impact. The nitrate-nitrite-nitric oxide pathway is relevant in this process via production of nitric oxide ((•)NO) and nitric oxide-derived nitrogen oxides (NOx) at high concentrations. Using a highly sensitive and selective chemiluminescence approach, we found that exposure the stomach of rats to nitrite yielded S- and N-nitroso derivatives in gastric mucus cysteine-rich glycoproteins (mucins). To lesser extent, the underlying epithelial cell layers also suffered nitrite-driven S- and N-nitroso modifications which increased upon mucus removal, indicating that, under normal nitrite load, (•)NO and NOx can reach inner layers of the stomach wall and locally modify proteins. S-nitrosation was by large the predominant modification. In vitro and ex vivo experiments indicated that the gastric nitrosation pattern is triggered by dietary nitrite in a concentration dependent manner, encompassing the intermediary formation of (•)NO and is susceptible to modulation by dietary reductants, notably red wine polyphenols. Collectively, these results suggest a protective action of the mucus and potential (•)NO-dependent biochemical effects at deeper cells layers of the mucosa.
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Affiliation(s)
- Cassilda Pereira
- Center for Neuroscience and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000 Coimbra, Portugal
| | - Rui M Barbosa
- Center for Neuroscience and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000 Coimbra, Portugal
| | - João Laranjinha
- Center for Neuroscience and Cell Biology and Faculty of Pharmacy, University of Coimbra, 3000 Coimbra, Portugal.
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Ledo A, Lourenço CF, Caetano M, Barbosa RM, Laranjinha J. Age-associated changes of nitric oxide concentration dynamics in the central nervous system of Fisher 344 rats. Cell Mol Neurobiol 2014; 35:33-44. [PMID: 25274046 DOI: 10.1007/s10571-014-0115-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 09/17/2014] [Indexed: 01/25/2023]
Abstract
The increase in life expectancy is accompanied by an increased risk of developing neurodegenerative disorders and age is the most relevant risk factor for the appearance of cognitive decline. While decreased neuronal count has been proposed to be a major contributing factor to the appearance of age-associated cognitive decline, it appears to be insufficient to fully account for the decay in mental function in aged individuals. Nitric oxide ((•)NO) is a ubiquitous signaling molecule in the mammalian central nervous system. Closely linked to the activation of glutamatergic transmission in several structures of the brain, neuron-derived (•)NO can act as a neuromodulator in synaptic plasticity but has also been linked to neuronal toxicity and degenerative processes. Many studies have proposed that changes in the glutamate-(•)NO signaling pathway may be implicated in age-dependent cognitive decline and that the exact effect of such changes may be region specific. Due to its peculiar physical-chemical properties, namely hydrophobicity, small size, and rapid diffusion properties, the rate and pattern of (•)NO concentration changes are critical determinants for the understanding of its bioactivity in the brain. Here we show a detailed study of how (•)NO concentration dynamics change in the different regions of the brain of Fisher 344 rats (F344) during aging. Using microelectrodes inserted into the living brain of anesthetized F344 rats, we show here that glutamate-induced (•)NO concentration dynamics decrease in the hippocampus, striatum, and cerebral cortex as animals age. performance in behavior testing of short-term and spatial memory, suggesting that the impairment in the glutamate:nNOS pathway represents a functional critical event in cognitive decline during aging.
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Affiliation(s)
- Ana Ledo
- Center for Neuroscience and Cell Biology, Coimbra, Portugal
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39
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Rocha B, Correia M, Barbosa R, Laranjinha J. A dietary-driven redox modulation of gut microbiome-host interactions: the rescue of epithelial barrier and mucus production during dysbiosis by dietary nitrate. Free Radic Biol Med 2014; 75 Suppl 1:S36-7. [PMID: 26461352 DOI: 10.1016/j.freeradbiomed.2014.10.779] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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] [Indexed: 11/21/2022]
Abstract
Dietary nitrate, from green-leafy vegetables, is reduced to nitrite in the oral cavity and to nitric oxide ((•)NO) in the stomach. Gut microbiota is raising a great deal of interest since it has been recognized to be crucial to maintain gastrointestinal (GI) and systemic welfare. Dysbiosis (altered gut flora) is associated with increased epithelial permeability, deficient mucus production and with the activation of inflammatory pathways. Here we investigate whether dietary nitrate rescues GI physiology during dysbiosis. Four groups of Wistar rats were maintained in the animal facilities for 7 days during which, in addition to food, they had access to 1) water, 2) an antibiotic cocktail (neomycin, bacitracin, imipenem), 3) antibiotic cocktail sodium nitrate 10mM, 4) sodium nitrate. Animals were weighted daily. At the end of 7(th) day they were anesthetized (isoflurane) and euthanized. Ceca were collected and weighted. The stomach was isolated and occludin, claudin-5, ZO-1, iNOS and myeloperoxidase (MPO) were analyzed by western blot and immunofluorescence (n=4, triplicate). Values are mean±SEM. Antibiotic exposure prevented weight gain in all animals when compared to controls. Nitrate prevented body weight loss under dysbiosis. Ceca from animals with altered gut flora contained more fecal material than the ones from animals treated with nitrate under the same circumstances (18.47±0.99g vs 14.7±71.12g, p<0.05). Dysbiosis reduced occludin expression but supplementation with nitrate recovered this protein to control levels (p<0.05). No significant differences were observed for ZO-1 or claudin-5. Nitrate prevented MPO (115.70±5.36 vs 61.00±19.00, p<0.05; % of control) and iNOS (279.8±88.1 vs 57.3±18.4, p<0.05, % of control) overexpression under dysbiosis suggesting the prevention of an over stimulated inflammatory status in the gut. This data suggests that dietary nitrate may ensure gastric epithelial integrity and mucus production during dysbiosis. Supported by PTDC/AGR-ALI/115744/2009.
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Affiliation(s)
- Bárbara Rocha
- University of Coimbra (Faculty of Pharmacy and Center for Neurosciences and Cell Biology), Portugal
| | - Mariana Correia
- University of Coimbra (Faculty of Pharmacy and Center for Neurosciences and Cell Biology), Portugal
| | - Rui Barbosa
- University of Coimbra (Faculty of Pharmacy and Center for Neurosciences and Cell Biology), Portugal
| | - João Laranjinha
- University of Coimbra (Faculty of Pharmacy and Center for Neurosciences and Cell Biology), Portugal.
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40
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Lourenço CF, Santos RM, Barbosa RM, Cadenas E, Radi R, Laranjinha J. Neurovascular coupling in hippocampus is mediated via diffusion by neuronal-derived nitric oxide. Free Radic Biol Med 2014; 73:421-9. [PMID: 24887095 DOI: 10.1016/j.freeradbiomed.2014.05.021] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 05/19/2014] [Accepted: 05/23/2014] [Indexed: 02/08/2023]
Abstract
The coupling between neuronal activity and cerebral blood flow (CBF) is essential for normal brain function. The mechanisms behind this neurovascular coupling process remain elusive, mainly because of difficulties in probing dynamically the functional and coordinated interaction between neurons and the vasculature in vivo. Direct and simultaneous measurements of nitric oxide (NO) dynamics and CBF changes in hippocampus in vivo support the notion that during glutamatergic activation nNOS-derived NO induces a time-, space-, and amplitude-coupled increase in the local CBF, later followed by a transient increase in local O2 tension. These events are dependent on the activation of the NMDA-glutamate receptor and nNOS, without a significant contribution of endothelial-derived NO or astrocyte-neuron signaling pathways. Upon diffusion of NO from active neurons, the vascular response encompasses the activation of soluble guanylate cyclase. Hence, in the hippocampus, neurovascular coupling is mediated by nNOS-derived NO via a diffusional connection between active glutamatergic neurons and blood vessels.
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Affiliation(s)
- Cátia F Lourenço
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, 3000-548 Coimbra, Portugal
| | - Ricardo M Santos
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, 3000-548 Coimbra, Portugal
| | - Rui M Barbosa
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, 3000-548 Coimbra, Portugal
| | - Enrique Cadenas
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, USA
| | - Rafael Radi
- Department of Biochemistry and Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la Republica, Montevideo, Uruguay
| | - João Laranjinha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, 3000-548 Coimbra, Portugal.
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41
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Laranjinha J. Nutrition and ageing: from phenomenological observations to molecular mechanisms. Genes Nutr 2014; 9:407. [PMID: 24903833 DOI: 10.1007/s12263-014-0407-5] [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] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 05/09/2014] [Indexed: 11/30/2022]
Affiliation(s)
- João Laranjinha
- Faculty of Pharmacy, Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal,
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42
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Lourenço CF, Ferreira NR, Santos RM, Lukacova N, Barbosa RM, Laranjinha J. The pattern of glutamate-induced nitric oxide dynamics in vivo and its correlation with nNOS expression in rat hippocampus, cerebral cortex and striatum. Brain Res 2014; 1554:1-11. [PMID: 24495843 DOI: 10.1016/j.brainres.2014.01.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 07/17/2013] [Revised: 01/13/2014] [Accepted: 01/18/2014] [Indexed: 01/20/2023]
Abstract
Nitric oxide (NO) is a diffusible intercellular messenger, acting via volume signaling in the brain and, therefore, the knowledge of its temporal dynamics is determinant to the understanding of its neurobiological role. However, such an analysis in vivo is challenging and indirect or static approaches are mostly used to infer NO bioactivity. In the present work we measured the glutamate-dependent NO temporal dynamics in vivo in the hippocampus (CA1, CA3 and DG subregions), cerebral cortex and striatum, using NO selective microelectrodes. Concurrently, the immunolocalization of nNOS was evaluated in each region. A transitory increase in NO levels occurred at higher amplitudes in the striatum and hippocampus relatively to the cortex. In the hippocampus, subtle differences in the profiles of NO signals were observed along the trisynaptic loop, with CA1 exhibiting the largest signals. The topography of NO temporal dynamics did not fully overlap with the pattern of the density of nNOS expression, suggesting that, complementary to the distribution of nNOS, the local regulation of NO synthesis as well as the decay pathways critically determine the effective NO concentration sensed by a target within the diffusional spread of this free radical. In sum, the rate and pattern of NO changes here shown, by incorporating regulatory mechanisms and processes that affect NO synthesis and decay, provide refined information critical for the understanding of NO multiple actions in the brain.
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Affiliation(s)
- C F Lourenço
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - N R Ferreira
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - R M Santos
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - N Lukacova
- Institute of Neurobiology, Slovak Academy of Sciences, Soltésovej 4, 040 01 Kosice, Slovak Republic
| | - R M Barbosa
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - J Laranjinha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
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Ferreira NR, Santos RM, Laranjinha J, Barbosa RM. Real Time In Vivo Measurement of Ascorbate in the Brain Using Carbon Nanotube-Modified Microelectrodes. ELECTROANAL 2013. [DOI: 10.1002/elan.201300053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Oliveira SCB, Santarino IB, Enache TA, Nunes C, Laranjinha J, Barbosa RM, Oliveira-Brett AM. Human colon adenocarcinoma HT-29 cell: electrochemistry and nicotine stimulation. Bioelectrochemistry 2013; 94:30-8. [PMID: 23774106 DOI: 10.1016/j.bioelechem.2013.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/14/2013] [Accepted: 05/17/2013] [Indexed: 11/30/2022]
Abstract
Recently, it was demonstrated that colorectal cancer HT-29 cells can secrete epinephrine (adrenaline) in an autocrine manner to auto-stimulate cellular growth by adrenoreceptors activation, and that this secretion is enhanced by nicotine, showing an indirect relation between colorectal cancer and tobacco. The electrochemical behaviour of human colon adenocarcinoma HT-29 cells from a colorectal adenocarcinoma cell line, the hormone and neurotransmitter epinephrine, and nicotine, were investigated by cyclic voltammetry, using indium tin oxide (ITO), glassy carbon (GC) and screen printed carbon (SPC) electrodes. The oxidation of the HT-29 cells, previously grown onto ITO or SPC surfaces, followed an irreversible oxidation process that involved the formation of a main oxidation product that undergoes irreversible reduction, as in the epinephrine oxidation mechanism. The effect of nicotine stimulation of the HT-29 cells was also investigated. Nicotine, at different concentration levels 1, 2 and 15 mM, was introduced in the culture medium and an increase with incubation time, 0 to 3h and 30 min, of the HT-29 cells oxidation and reduction peaks was observed. The interaction of nicotine with the HT-29 cells stimulated the epinephrine secretion causing an increase in epinephrine release concentration, and enabling the conclusion that epinephrine and nicotine play an important role in the colorectal tumour growth.
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Affiliation(s)
- S C B Oliveira
- Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, 3004-535 Coimbra, Portugal
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Pereira C, Ferreira NR, Rocha BS, Barbosa RM, Laranjinha J. The redox interplay between nitrite and nitric oxide: From the gut to the brain. Redox Biol 2013; 1:276-84. [PMID: 24024161 PMCID: PMC3757698 DOI: 10.1016/j.redox.2013.04.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [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: 02/10/2013] [Accepted: 04/09/2013] [Indexed: 02/09/2023] Open
Abstract
The reversible redox conversion of nitrite and nitric oxide ((•)NO) in a physiological setting is now widely accepted. Nitrite has long been identified as a stable intermediate of (•)NO oxidation but several lines of evidence support the reduction of nitrite to nitric oxide in vivo. In the gut, this notion implies that nitrate from dietary sources fuels the longstanding production of nitrite in the oral cavity followed by univalent reduction to (•)NO in the stomach. Once formed, (•)NO boosts a network of reactions, including the production of higher nitrogen oxides that may have a physiological impact via the post-translational modification of proteins and lipids. Dietary compounds, such as polyphenols, and different prandial states (secreting specific gastric mediators) modulate the outcome of these reactions. The gut has unusual characteristics that modulate nitrite and (•)NO redox interplay: (1) wide range of pH (neutral vs acidic) and oxygen tension (c.a. 70 Torr in the stomach and nearly anoxic in the colon), (2) variable lumen content and (3) highly developed enteric nervous system (sensitive to (•)NO and dietary compounds, such as glutamate). The redox interplay of nitrite and (•)NO might also participate in the regulation of brain homeostasis upon neuronal glutamatergic stimulation in a process facilitated by ascorbate and a localized and transient decrease of oxygen tension. In a way reminiscent of that occurring in the stomach, a nitrite/(•)NO/ascorbate redox interplay in the brain at glutamatergic synapses, contributing to local (•)NO increase, may impact on (•)NO-mediated process. We here discuss the implications of the redox conversion of nitrite to (•)NO in the gut, how nitrite-derived (•)NO may signal from the digestive to the central nervous system, influencing brain function, as well as a putative ascorbate-driven nitrite/NO pathway occurring in the brain.
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Affiliation(s)
- Cassilda Pereira
- Department of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
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Rocha BS, Gago B, Barbosa RM, Lundberg JO, Mann GE, Radi R, Laranjinha J. Pepsin is nitrated in the rat stomach, acquiring antiulcerogenic activity: a novel interaction between dietary nitrate and gut proteins. Free Radic Biol Med 2013; 58:26-34. [PMID: 23277149 DOI: 10.1016/j.freeradbiomed.2012.12.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 12/04/2012] [Accepted: 12/11/2012] [Indexed: 02/08/2023]
Abstract
Dietary nitrate is reduced to nitrite and nitric oxide ((•)NO) in the gut, producing reactive species able to nitrate proteins and lipids. We investigated intragastric production of (•)NO and nitrating agents in vivo by examining selective nitration of pepsinogen and pepsin. We further addressed the functional impact of nitration on peptic activity by evaluating the progression of secretagogue-induced ulcers. Pepsinogen nitration was assessed in healthy and diclofenac-induced ulcerated rat stomachs. Both groups were fed nitrite or water by oral gavage. Protein nitration was studied by immunofluorescence and immunoprecipitation. In parallel experiments, pentagastrin was administered to rats and nitrite was then instilled intragastrically. (•)NO levels were measured before and after nitrite administration by chemiluminescence. Macroscopic damage was assessed and nitrated pepsin was examined in the margin of ulcers. Protein nitration was detected physiologically in the stomach of healthy animals. Nitrite had a dual effect on intragastric nitration: overall nitration was decreased under physiological conditions but enhanced by acute inflammation. Pepsin and pepsinogen were also nitrated via a nitrite-dependent pathway. Nitration of both pepsin and its zymogen led to decreased peptic activity in response to classical substrates (e.g., collagen). Under conditions of acute ulceration, nitrite-dependent pepsin nitration prevented the development of gastric ulcers. Dietary nitrite generates nitrating agents in the stomach in vivo, markedly decreasing peptic activity. Under inflammatory and ulcerogenic conditions pepsin nitration attenuates the progression of gastric ulceration. These results suggest that dietary nitrite-dependent nitration of pepsin may have a novel antiulcerogenic effect in vivo.
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Affiliation(s)
- Bárbara S Rocha
- Faculty of Pharmacy and Center for Neurosciences and Cell Biology, University of Coimbra, Health Sciences Campus, 3000-548 Coimbra, Portugal
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Santos RM, Rodrigues MS, Laranjinha J, Barbosa RM. Biomimetic sensor based on hemin/carbon nanotubes/chitosan modified microelectrode for nitric oxide measurement in the brain. Biosens Bioelectron 2013; 44:152-9. [PMID: 23419387 DOI: 10.1016/j.bios.2013.01.015] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 01/06/2013] [Accepted: 01/07/2013] [Indexed: 01/19/2023]
Abstract
A novel biomimetic microsensor for measuring nitric oxide (NO) in the brain in vivo was developed. The sensor consists of hemin and functionalized multi-wall carbon nanotubes covalently attached to chitosan via the carbodiimide crosslinker EDC followed by chitosan electrodeposition on the surface of carbon fiber microelectrodes. Cyclic voltammetry supported direct electron transfer from the Fe(III)/Fe(II) couple of hemin to the carbon surface at -0.370 V and -0.305 V vs. Ag/AgCl for cathodic and anodic peaks, respectively. Square wave voltammetry revealed a NO reduction peak at -0.762 V vs. Ag/AgCl that increased linearly with NO concentration between 0.25 and 1 μM. The average sensitivity of the microsensors was 1.72 nA/μM and the limit of detection was 25 nM. Oxygen and hydrogen peroxide reduction peaks were observed at -0.269 V and -0.332 V vs. Ag/AgCl, respectively and no response was observed for other relevant interferents, namely ascorbate, nitrite and dopamine. The microsensor was successfully applied to the measurement of exogenously applied NO in the rat brain in vivo.
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Affiliation(s)
- Ricardo M Santos
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
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Nunes C, Ferreira E, Freitas V, Almeida L, Barbosa RM, Laranjinha J. Intestinal anti-inflammatory activity of red wine extract: unveiling the mechanisms in colonic epithelial cells. Food Funct 2012; 4:373-83. [PMID: 23233037 DOI: 10.1039/c2fo30233k] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The development of new therapeutic approaches, combining efficacy and safety against intestinal inflammation, notably inflammatory bowel disease (IBD), has emerged as an important goal due to the significant side effects and the lack of effectiveness of standard current therapies. Recently, several studies described the health-promoting effects of red wine, including anti-inflammatory properties, but the molecular mechanisms underlying its beneficial role remain largely unknown. Red wine is rich in phenolic compounds and it has been suggested that the positive effect of red wine intake might be attributed not only to the antioxidant properties of these compounds but also to the modulation of signalling cascades in connection with physiological and pathophysiological conditions such as inflammatory processes. This study assesses the potential anti-inflammatory action of a red wine extract (RWE) enriched in polyphenols in a cellular model of intestinal inflammation using cytokines-stimulated HT-29 colon epithelial cells. RWE suppressed cytokines-induced IκB degradation and interleukin-8 production in a dose-dependent manner. Coherently, key inflammatory mediators downstream NF-κB activation; notably cyclooxygenase-2 and inducible nitric oxide synthase were maintained at low levels by RWE in the presence of the cytokines. Additionally, RWE inhibited both the increase of nitric oxide derived from iNOS and of protein tyrosine nitration, a biomarker of nitrosative stress that typically requires the reaction of nitric oxide with the superoxide radical. Taken together, the anti-inflammatory action of RWE, mechanistically supported by the modulation of cascades orchestrated by NF-κB and involving nitric oxide, suggests that RWE (a readily straightforward preparation when compared with the purification of specific compounds) may represent a simple and inexpensive therapeutic strategy in the context of intestinal inflammation.
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Affiliation(s)
- Carla Nunes
- Center for Neurosciences and Cell Biology and Faculty of Pharmacy, University of Coimbra, Health Sciences Campus, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
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Figueiras E, Oliveira R, Lourenço CF, Campos R, Humeau-Heurtier A, Barbosa RM, Laranjinha J, Requicha Ferreira LF, de Mul FFM. Self-mixing microprobe for monitoring microvascular perfusion in rat brain. Med Biol Eng Comput 2012; 51:103-12. [PMID: 23065628 DOI: 10.1007/s11517-012-0973-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 09/28/2012] [Indexed: 12/01/2022]
Abstract
Measuring functional activity in brain in connection with neural stimulation faces technological challenges. Our goal is to evaluate, in relative terms, the real-time variations of local cerebral blood flow in rat brain, with a convenient spatial resolution. The use of laser Doppler flowmetry (LDF) probes is a promising approach but commercially available LDF probes are still too large (450 μm) to allow insertion in brain tissue without causing damage in an extension that may negatively impact local measurements. The self-mixing technique coupled to LDF is herein proposed to overcome limitations of the minimal diameter of the probe imposed by non-self-mixing probes (commercial available probes). Our Monte Carlo simulations show that laser photons have a mean penetration depth of 0.15 mm, on the rat brain with the 785 nm laser light microprobe. Moreover, three self-mixing signal processing methods are tested: counting method, autocorrelation method, power spectrum method. The perfusion signal computed shows a good linearity with the scatterers velocity, for the three methods (a determination coefficient close to one is obtained), for the in vitro measurements. Furthermore, we believe that these indicators can be used to monitor local blood flow changes in the rat brain.
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Affiliation(s)
- Edite Figueiras
- Instrumentation Center (GEI-CI), Physics Department, Faculty of Sciences and Technology of Coimbra University, Coimbra, Portugal.
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Laranjinha J, Santos RM, Lourenço CF, Ledo A, Barbosa RM. Nitric oxide signaling in the brain: translation of dynamics into respiration control and neurovascular coupling. Ann N Y Acad Sci 2012; 1259:10-8. [DOI: 10.1111/j.1749-6632.2012.06582.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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