51
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Gonçalves FQ, Lopes JP, Silva HB, Lemos C, Silva AC, Gonçalves N, Tomé ÂR, Ferreira SG, Canas PM, Rial D, Agostinho P, Cunha RA. Synaptic and memory dysfunction in a β-amyloid model of early Alzheimer's disease depends on increased formation of ATP-derived extracellular adenosine. Neurobiol Dis 2019; 132:104570. [PMID: 31394204 DOI: 10.1016/j.nbd.2019.104570] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/09/2019] [Accepted: 08/02/2019] [Indexed: 01/01/2023] Open
Abstract
Adenosine A2A receptors (A2AR) overfunction causes synaptic and memory dysfunction in early Alzheimer's disease (AD). In a β-amyloid (Aβ1-42)-based model of early AD, we now unraveled that this involves an increased synaptic release of ATP coupled to an increased density and activity of ecto-5'-nucleotidase (CD73)-mediated formation of adenosine selectively activating A2AR. Thus, CD73 inhibition with α,β-methylene-ADP impaired long-term potentiation (LTP) in mouse hippocampal slices, which is occluded upon previous superfusion with the A2AR antagonist SCH58261. Furthermore, α,β-methylene-ADP did not alter LTP amplitude in global A2AR knockout (KO) and in forebrain neuron-selective A2AR-KO mice, but inhibited LTP amplitude in astrocyte-selective A2AR-KO mice; this shows that CD73-derived adenosine solely acts on neuronal A2AR. In agreement with the concept that ATP is a danger signal in the brain, ATP release from nerve terminals is increased after intracerebroventricular Aβ1-42 administration, together with CD73 and A2AR upregulation in hippocampal synapses. Importantly, this increased CD73 activity is critically required for Aβ1-42 to impair synaptic plasticity and memory since Aβ1-42-induced synaptic and memory deficits were eliminated in CD73-KO mice. These observations establish a key regulatory role of CD73 activity over neuronal A2AR and imply CD73 as a novel target for modulation of early AD.
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Affiliation(s)
- Francisco Q Gonçalves
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - João P Lopes
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Henrique B Silva
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Cristina Lemos
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - António C Silva
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Nélio Gonçalves
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Ângelo R Tomé
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Samira G Ferreira
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Paula M Canas
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Daniel Rial
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Paula Agostinho
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; FMUC-Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Rodrigo A Cunha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; FMUC-Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal.
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52
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Towers AE, Oelschlager ML, Lorenz M, Gainey SJ, McCusker RH, Krauklis SA, Freund GG. Handling stress impairs learning through a mechanism involving caspase-1 activation and adenosine signaling. Brain Behav Immun 2019; 80:763-776. [PMID: 31108171 PMCID: PMC6664453 DOI: 10.1016/j.bbi.2019.05.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 05/01/2019] [Accepted: 05/16/2019] [Indexed: 12/11/2022] Open
Abstract
Acute stressors can induce fear and physiologic responses that prepare the body to protect from danger. A key component of this response is immune system readiness. In particular, inflammasome activation appears critical to linking stress to the immune system. Here, we show that a novel combination of handling procedures used regularly in mouse research impairs novel object recognition (NOR) and activates caspase-1 in the amygdala. In male mice, this handling-stress paradigm combined weighing, scruffing and sham abdominal injection once per hr. While one round of weigh/scruff/needle-stick had no impact on NOR, two rounds compromised NOR without impacting location memory or anxiety-like behaviors. Caspase-1 knockout (KO), IL-1 receptor 1 (IL-1R1) KO and IL-1 receptor antagonist (IL-RA)-administered mice were resistant to handling stress-induced loss of NOR. In addition, examination of the brain showed that handling stress increased caspase-1 activity 85% in the amygdala without impacting hippocampal caspase-1 activity. To delineate danger signals relevant to handling stress, caffeine-administered and adenosine 2A receptor (A2AR) KO mice were tested and found resistant to impaired learning and caspase-1 activation. Finally, mice treated with the β-adrenergic receptor antagonist, propranolol, were resistant to handling stress-induced loss of NOR and caspase-1 activation. Taken together, these results indicate that handling stress-induced impairment of object learning is reliant on a pathway requiring A2AR-dependent activation of caspase-1 in the amygdala that appears contingent on β-adrenergic receptor functionality.
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Affiliation(s)
- Albert E Towers
- Division of Nutritional Sciences, University of Illinois, Urbana, IL, USA
| | | | - Madelyn Lorenz
- Department of Pathology, Program in Integrative Immunology and Behavior, University of Illinois, Urbana, IL, USA
| | - Stephen J Gainey
- Department of Animal Sciences, University of Illinois, Urbana, IL, USA
| | - Robert H McCusker
- Department of Animal Sciences, University of Illinois, Urbana, IL, USA; Department of Pathology, Program in Integrative Immunology and Behavior, University of Illinois, Urbana, IL, USA
| | - Steven A Krauklis
- Division of Nutritional Sciences, University of Illinois, Urbana, IL, USA
| | - Gregory G Freund
- Division of Nutritional Sciences, University of Illinois, Urbana, IL, USA; Department of Animal Sciences, University of Illinois, Urbana, IL, USA; Department of Pathology, Program in Integrative Immunology and Behavior, University of Illinois, Urbana, IL, USA.
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53
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Light-activated chimeric GPCRs: limitations and opportunities. Curr Opin Struct Biol 2019; 57:196-203. [PMID: 31207383 DOI: 10.1016/j.sbi.2019.05.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 01/01/2023]
Abstract
Light-activated chimeric GPCRs, termed OptoXRs, can elicit cell signalling responses with the high spatial and temporal precision of light. In recent years, an expanding OptoXR toolkit has been applied to, for example, dissect neural circuits in awake rodents, guide cell migration during vertebrate development and even restore visual responses in a rodent model of blindness. OptoXRs have been further developed through incorporation of highly sensitive photoreceptor domains and a plethora of signalling modules. The availability of new high-resolution structures of GPCRs and a deeper understanding of GPCR function allows critically revisitation of the design of OptoXRs. Next-generation OptoXRs will build on advances in structural biology, receptor function and photoreceptor diversity to manipulate GPCR signalling with unprecedented accuracy and precision.
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54
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Castro DC, Bruchas MR. A Motivational and Neuropeptidergic Hub: Anatomical and Functional Diversity within the Nucleus Accumbens Shell. Neuron 2019; 102:529-552. [PMID: 31071288 PMCID: PMC6528838 DOI: 10.1016/j.neuron.2019.03.003] [Citation(s) in RCA: 145] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 02/22/2019] [Accepted: 03/01/2019] [Indexed: 01/14/2023]
Abstract
The mesocorticolimbic pathway is canonically known as the "reward pathway." Embedded within the center of this circuit is the striatum, a massive and complex network hub that synthesizes motivation, affect, learning, cognition, stress, and sensorimotor information. Although striatal subregions collectively share many anatomical and functional similarities, it has become increasingly clear that it is an extraordinarily heterogeneous region. In particular, the nucleus accumbens (NAc) medial shell has repeatedly demonstrated that the rules dictated by more dorsal aspects of the striatum do not apply or are even reversed in functional logic. These discrepancies are perhaps most easily captured when isolating the functions of various neuromodulatory peptide systems within the striatum. Endogenous peptides are thought to play a critical role in modulating striatal signals to either amplify or dampen evoked behaviors. Here we describe the anatomical-functional backdrop upon which several neuropeptides act within the NAc to modulate behavior, with a specific emphasis on nucleus accumbens medial shell and stress responsivity. Additionally, we propose that, as the field continues to dissect fast neurotransmitter systems within the NAc, we must also provide considerable contextual weight to the roles local peptides play in modulating these circuits to more comprehensively understand how this important subregion gates motivated behaviors.
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Affiliation(s)
- Daniel C Castro
- Center for Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA
| | - Michael R Bruchas
- Center for Neurobiology of Addiction, Pain, and Emotion, University of Washington, Seattle, WA 98195, USA; Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98195, USA; Department of Pharmacology, University of Washington, Seattle, WA 98195, USA.
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55
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Leffa DT, Ferreira SG, Machado NJ, Souza CM, Rosa FD, de Carvalho C, Kincheski GC, Takahashi RN, Porciúncula LO, Souza DO, Cunha RA, Pandolfo P. Caffeine and cannabinoid receptors modulate impulsive behavior in an animal model of attentional deficit and hyperactivity disorder. Eur J Neurosci 2019; 49:1673-1683. [PMID: 30667546 DOI: 10.1111/ejn.14348] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 12/15/2018] [Accepted: 12/27/2018] [Indexed: 12/12/2022]
Abstract
Attention deficit and hyperactivity disorder (ADHD) is characterized by impaired levels of hyperactivity, impulsivity, and inattention. Adenosine and endocannabinoid systems tightly interact in the modulation of dopamine signaling, involved in the neurobiology of ADHD. In this study, we evaluated the modulating effects of the cannabinoid and adenosine systems in a tolerance to delay of reward task using the most widely used animal model of ADHD. Spontaneous Hypertensive Rats (SHR) and Wistar-Kyoto rats were treated chronically or acutely with caffeine, a non-selective adenosine receptor antagonist, or acutely with a cannabinoid agonist (WIN55212-2, WIN) or antagonist (AM251). Subsequently, animals were tested in the tolerance to delay of reward task, in which they had to choose between a small, but immediate, or a large, but delayed, reward. Treatment with WIN decreased, whereas treatment with AM251 increased the choices of the large reward, selectively in SHR rats, indicating a CB1 receptor-mediated increase in impulsive behavior. An acute pre-treatment with caffeine blocked WIN effects. Conversely, a chronic treatment with caffeine increased the impulsive phenotype and potentiated the WIN effects. The results indicate that both cannabinoid and adenosine receptors modulate impulsive behavior in SHR: the antagonism of cannabinoid receptors might be effective in reducing impulsive symptoms present in ADHD; in addition, caffeine showed the opposite effects on impulsive behavior depending on the length of treatment. These observations are of particular importance to consider when therapeutic manipulation of CB1 receptors is applied to ADHD patients who consume coffee.
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Affiliation(s)
- Douglas T Leffa
- Department of Biochemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Samira G Ferreira
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Nuno J Machado
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Carolina M Souza
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Fernanda da Rosa
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Cristiane de Carvalho
- Department of Pharmacology, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Grasielle C Kincheski
- Institute of Medical Biochemistry Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Reinaldo N Takahashi
- Department of Pharmacology, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Lisiane O Porciúncula
- Department of Biochemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Diogo O Souza
- Department of Biochemistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Rodrigo A Cunha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Pablo Pandolfo
- Department of Neurobiology, Universidade Federal Fluminense, Niterói, Brazil
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56
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Duarte JMN, Skoug C, Silva HB, Carvalho RA, Gruetter R, Cunha RA. Impact of Caffeine Consumption on Type 2 Diabetes-Induced Spatial Memory Impairment and Neurochemical Alterations in the Hippocampus. Front Neurosci 2019; 12:1015. [PMID: 30686981 PMCID: PMC6333904 DOI: 10.3389/fnins.2018.01015] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022] Open
Abstract
Diabetes affects the morphology and plasticity of the hippocampus, and leads to learning and memory deficits. Caffeine has been proposed to prevent memory impairment upon multiple chronic disorders with neurological involvement. We tested whether long-term caffeine consumption prevents type 2 diabetes (T2D)-induced spatial memory impairment and hippocampal alterations, including synaptic degeneration, astrogliosis, and metabolic modifications. Control Wistar rats and Goto-Kakizaki (GK) rats that develop T2D were treated with caffeine (1 g/L in drinking water) for 4 months. Spatial memory was evaluated in a Y-maze. Hippocampal metabolic profile and glucose homeostasis were investigated by 1H magnetic resonance spectroscopy. The density of neuronal, synaptic, and glial-specific markers was evaluated by Western blot analysis. GK rats displayed reduced Y-maze spontaneous alternation and a lower amplitude of hippocampal long-term potentiation when compared to controls, suggesting impaired hippocampal-dependent spatial memory. Diabetes did not impact the relation of hippocampal to plasma glucose concentrations, but altered the neurochemical profile of the hippocampus, such as increased in levels of the osmolites taurine (P < 0.001) and myo-inositol (P < 0.05). The diabetic hippocampus showed decreased density of the presynaptic proteins synaptophysin (P < 0.05) and SNAP25 (P < 0.05), suggesting synaptic degeneration, and increased GFAP (P < 0.001) and vimentin (P < 0.05) immunoreactivities that are indicative of astrogliosis. The effects of caffeine intake on hippocampal metabolism added to those of T2D, namely reducing myo-inositol levels (P < 0.001) and further increasing taurine levels (P < 0.05). Caffeine prevented T2D-induced alterations of GFAP, vimentin and SNAP25, and improved memory deficits. We conclude that caffeine consumption has beneficial effects counteracting alterations in the hippocampus of GK rats, leading to the improvement of T2D-associated memory impairment.
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Affiliation(s)
- João M N Duarte
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Laboratory for Functional and Metabolic Imaging, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Department of Experimental Medical Science, Faculty of Medicine, Lund University, Lund, Sweden.,Wallenberg Centre for Molecular Medicine, Lund University, Lund, Sweden
| | - Cecilia Skoug
- Department of Experimental Medical Science, Faculty of Medicine, Lund University, Lund, Sweden.,Wallenberg Centre for Molecular Medicine, Lund University, Lund, Sweden
| | - Henrique B Silva
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Rui A Carvalho
- Department of Life Sciences, Faculty of Science and Technology, University of Coimbra, Coimbra, Portugal
| | - Rolf Gruetter
- Laboratory for Functional and Metabolic Imaging, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Department of Radiology, University of Lausanne, Lausanne, Switzerland.,Department of Radiology, University of Geneva, Geneva, Switzerland
| | - Rodrigo A Cunha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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57
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Adenosine A 2A-Cannabinoid CB 1 Receptor Heteromers in the Hippocampus: Cannabidiol Blunts Δ 9-Tetrahydrocannabinol-Induced Cognitive Impairment. Mol Neurobiol 2019; 56:5382-5391. [PMID: 30610611 DOI: 10.1007/s12035-018-1456-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 12/14/2018] [Indexed: 12/13/2022]
Abstract
At present, clinical interest in the plant-derived cannabinoid compound cannabidiol (CBD) is rising exponentially, since it displays multiple therapeutic properties. In addition, CBD can counteract the undesirable effects of the psychoactive cannabinoid Δ9-tetrahydrocannabinol (Δ9-THC) that hinder clinical development of cannabis-based therapies. Despite this attention, the mechanisms of CBD action and its interaction with Δ9-THC are still not completely elucidated. Here, by combining in vivo and complementary molecular techniques, we demonstrate for the first time that CBD blunts the Δ9-THC-induced cognitive impairment in an adenosine A2A receptor (A2AR)-dependent manner. Furthermore, we reveal the existence of A2AR and cannabinoid CB1 receptor (CB1R) heteromers at the presynaptic level in CA1 neurons in the hippocampus. Interestingly, our findings support a brain region-dependent A2AR-CB1R functional interplay; indeed, CBD was not capable of modifying motor functions presumably regulated by striatal A2AR/CB1R complexes, nor anxiety responses related to other brain regions. Overall, these data provide new evidence regarding the mechanisms of action of CBD and the nature of A2AR-CB1R interactions in the brain.
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58
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Leffa DT, Pandolfo P, Gonçalves N, Machado NJ, de Souza CM, Real JI, Silva AC, Silva HB, Köfalvi A, Cunha RA, Ferreira SG. Adenosine A 2A Receptors in the Rat Prelimbic Medial Prefrontal Cortex Control Delay-Based Cost-Benefit Decision Making. Front Mol Neurosci 2018; 11:475. [PMID: 30618621 PMCID: PMC6306464 DOI: 10.3389/fnmol.2018.00475] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 12/05/2018] [Indexed: 12/23/2022] Open
Abstract
Adenosine A2A receptors (A2ARs) were recently described to control synaptic plasticity and network activity in the prefrontal cortex (PFC). We now probed the role of these PFC A2AR by evaluating the behavioral performance (locomotor activity, anxiety-related behavior, cost-benefit decision making and working memory) of rats upon downregulation of A2AR selectively in the prelimbic medial PFC (PLmPFC) via viral small hairpin RNA targeting the A2AR (shA2AR). The most evident alteration observed in shA2AR-treated rats, when compared to sh-control (shCTRL)-treated rats, was a decrease in the choice of the large reward upon an imposed delay of 15 s assessed in a T-maze-based cost-benefit decision-making paradigm, suggestive of impulsive decision making. Spontaneous locomotion in the open field was not altered, suggesting no changes in exploratory behavior. Furthermore, rats treated with shA2AR in the PLmPFC also displayed a tendency for higher anxiety levels in the elevated plus maze (less entries in the open arms), but not in the open field test (time spent in the center was not affected). Finally, working memory performance was not significantly altered, as revealed by the spontaneous alternation in the Y-maze test and the latency to reach the platform in the repeated trial Morris water maze. These findings constitute the first direct demonstration of a role of PFC A2AR in the control of behavior in physiological conditions, showing their major contribution for the control of delay-based cost-benefit decisions.
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Affiliation(s)
- Douglas T Leffa
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Pablo Pandolfo
- Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Department of Neurobiology, Fluminense Federal University, Niterói, Brazil
| | - Nélio Gonçalves
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Nuno J Machado
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Carolina M de Souza
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Post-Graduate Program in Medical Sciences, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Joana I Real
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - António C Silva
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Henrique B Silva
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Attila Köfalvi
- CNC-Center for Neuroscience and Cell Biology, 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
| | - Samira G Ferreira
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
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59
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Duarte JM, Gaspar R, Caetano L, Patrício P, Soares-Cunha C, Mateus-Pinheiro A, Alves ND, Santos AR, Ferreira SG, Sardinha V, Oliveira JF, Fontes-Ribeiro C, Sousa N, Cunha RA, Ambrósio AF, Pinto L, Rodrigues AJ, Gomes CA. Region-specific control of microglia by adenosine A2A
receptors: uncoupling anxiety and associated cognitive deficits in female rats. Glia 2018; 67:182-192. [DOI: 10.1002/glia.23476] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 05/23/2018] [Accepted: 05/28/2018] [Indexed: 01/24/2023]
Affiliation(s)
- Joana Mendes Duarte
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine; University of Coimbra; Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB); University of Coimbra; Portugal
| | - Rita Gaspar
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine; University of Coimbra; Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB); University of Coimbra; Portugal
| | - Liliana Caetano
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine; University of Coimbra; Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB); University of Coimbra; Portugal
- CNC - Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
| | - Patrícia Patrício
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Carina Soares-Cunha
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - António Mateus-Pinheiro
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Nuno Dinis Alves
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Ana Rita Santos
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Samira G Ferreira
- CNC - Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
| | - Vanessa Sardinha
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - João Filipe Oliveira
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Carlos Fontes-Ribeiro
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine; University of Coimbra; Coimbra Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Rodrigo A. Cunha
- Center for Innovation in Biomedicine and Biotechnology (CIBB); University of Coimbra; Portugal
- CNC - Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
| | - António F. Ambrósio
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine; University of Coimbra; Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB); University of Coimbra; Portugal
| | - Luísa Pinto
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Ana João Rodrigues
- Life and Health Sciences Research Institute (ICVS), School of Medicine; University of Minho; Braga Portugal
- ICVS/3B's -PT Government Associate Laboratory, Braga/Guimarães; Portugal
| | - Catarina A. Gomes
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine; University of Coimbra; Portugal
- Center for Innovation in Biomedicine and Biotechnology (CIBB); University of Coimbra; Portugal
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine; University of Coimbra; Coimbra Portugal
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60
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Mouro FM, Rombo DM, Dias RB, Ribeiro JA, Sebastião AM. Adenosine A 2A receptors facilitate synaptic NMDA currents in CA1 pyramidal neurons. Br J Pharmacol 2018; 175:4386-4397. [PMID: 30220081 PMCID: PMC6240125 DOI: 10.1111/bph.14497] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 07/18/2018] [Accepted: 08/21/2018] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND AND PURPOSE NMDA receptors play a key role in both synaptic plasticity and neurodegeneration. Adenosine is an endogenous neuromodulator and through membrane receptors of the A2A subtype can influence both synaptic plasticity and neuronal death. The present work was designed to evaluate the influence of adenosine A2A receptors upon NMDA receptor activity in CA1 hippocampal neurons. We discriminated between modulation of synaptic versus extrasynaptic receptors, since extrasynaptic NMDA receptors are mostly associated with neurodegeneration while synaptic NMDA receptors are linked to plasticity phenomena. EXPERIMENTAL APPROACH Whole-cell patch-clamp recordings were obtained to evaluate NMDA receptor actions on CA1 pyramidal neurons of young adult (5-10 weeks) male Wistar rat hippocampus. KEY RESULTS Activation of A2A receptors with CGS 21680 (30 nM) consistently facilitated chemically-evoked NMDA receptor-currents (NMDA-PSCs) and afferent-evoked NMDA-currents (NMDA-EPSCs), an action prevented by an A2A receptor antagonist (SCH58261, 100 nM) and a PKA inhibitor, H-89 (1 μM). These actions did not reflect facilitation in glutamate release since there was no change in NMDA-EPSCs paired pulse ratio. A2A receptor actions were lost in the presence of an open-channel NMDA receptor blocker, MK-801 (10 μM), but persisted in the presence of memantine, at a concentration (10 μM) known to preferentially block extrasynaptic NMDA receptors. CONCLUSION AND IMPLICATIONS These results show that A2A receptors exert a positive postsynaptic modulatory effect over synaptic, but not extrasynaptic, NMDA receptors in CA1 neurons and, therefore, under non-pathological conditions may contribute to shift the dual role of NMDA receptors towards enhancement of synaptic plasticity.
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Affiliation(s)
- Francisco M Mouro
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Diogo M Rombo
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Raquel B Dias
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Joaquim A Ribeiro
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Ana M Sebastião
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.,Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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61
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Blockade of adenosine A2A receptors recovers early deficits of memory and plasticity in the triple transgenic mouse model of Alzheimer's disease. Neurobiol Dis 2018; 117:72-81. [DOI: 10.1016/j.nbd.2018.05.024] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 05/08/2018] [Accepted: 05/30/2018] [Indexed: 11/23/2022] Open
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62
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Resveratrol Modulates and Reverses the Age-Related Effect on Adenosine-Mediated Signalling in SAMP8 Mice. Mol Neurobiol 2018; 56:2881-2895. [DOI: 10.1007/s12035-018-1281-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/23/2018] [Indexed: 12/20/2022]
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63
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Faivre E, Coelho JE, Zornbach K, Malik E, Baqi Y, Schneider M, Cellai L, Carvalho K, Sebda S, Figeac M, Eddarkaoui S, Caillierez R, Chern Y, Heneka M, Sergeant N, Müller CE, Halle A, Buée L, Lopes LV, Blum D. Beneficial Effect of a Selective Adenosine A 2A Receptor Antagonist in the APPswe/PS1dE9 Mouse Model of Alzheimer's Disease. Front Mol Neurosci 2018; 11:235. [PMID: 30050407 PMCID: PMC6052540 DOI: 10.3389/fnmol.2018.00235] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 06/15/2018] [Indexed: 02/06/2023] Open
Abstract
Consumption of caffeine, a non-selective adenosine A2A receptor (A2AR) antagonist, reduces the risk of developing Alzheimer’s disease (AD) and mitigates both amyloid and Tau lesions in transgenic mouse models of the disease. While short-term treatment with A2AR antagonists have been shown to alleviate cognitive deficits in mouse models of amyloidogenesis, impact of a chronic and long-term treatment on the development of amyloid burden, associated neuroinflammation and memory deficits has never been assessed. In the present study, we have evaluated the effect of a 6-month treatment of APPsw/PS1dE9 mice with the potent and selective A2AR antagonist MSX-3 from 3 to 9-10 months of age. At completion of the treatment, we found that the MSX-3 treatment prevented the development of memory deficits in APP/PS1dE9 mice, without significantly altering hippocampal and cortical gene expressions. Interestingly, MSX-3 treatment led to a significant decrease of Aβ1-42 levels in the cortex of APP/PS1dE9 animals, while Aβ1-40 increased, thereby strongly affecting the Aβ1-42/Aβ1-40 ratio. Together, these data support the idea that A2AR blockade is of therapeutic value for AD.
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Affiliation(s)
- Emilie Faivre
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Joana E Coelho
- Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, Universidade de Lisboa, Lisbon, Portugal
| | - Katja Zornbach
- Center of Advanced European Studies and Research, Bonn, Germany
| | - Enas Malik
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | - Younis Baqi
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany.,Department of Chemistry, Faculty of Science, Sultan Qaboos University, Muscat, Oman
| | - Marion Schneider
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | - Lucrezia Cellai
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Kevin Carvalho
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Shéhérazade Sebda
- Plateau de Génomique Fonctionnelle et Structurale, CHU Lille, University of Lille, Lille, France
| | - Martin Figeac
- Plateau de Génomique Fonctionnelle et Structurale, CHU Lille, University of Lille, Lille, France
| | - Sabiha Eddarkaoui
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Raphaëlle Caillierez
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Yijuang Chern
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Michael Heneka
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.,Department of Neurodegenerative Diseases and Geropsychiatry/Neurology, University of Bonn Medical Center, Bonn, Germany
| | - Nicolas Sergeant
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Christa E Müller
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | - Annett Halle
- Center of Advanced European Studies and Research, Bonn, Germany.,German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Luc Buée
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
| | - Luisa V Lopes
- Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, Universidade de Lisboa, Lisbon, Portugal
| | - David Blum
- Université de Lille, Inserm, CHU-Lille, LabEx DISTALZ, Jean-Pierre Aubert Research Centre UMR-S1172, Alzheimer & Tauopathies, Lille, France
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64
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Optical functionalization of human Class A orphan G-protein-coupled receptors. Nat Commun 2018; 9:1950. [PMID: 29769519 PMCID: PMC5956105 DOI: 10.1038/s41467-018-04342-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/20/2018] [Indexed: 12/21/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) form the largest receptor family, relay environmental stimuli to changes in cell behavior and represent prime drug targets. Many GPCRs are classified as orphan receptors because of the limited knowledge on their ligands and coupling to cellular signaling machineries. Here, we engineer a library of 63 chimeric receptors that contain the signaling domains of human orphan and understudied GPCRs functionally linked to the light-sensing domain of rhodopsin. Upon stimulation with visible light, we identify activation of canonical cell signaling pathways, including cAMP-, Ca2+-, MAPK/ERK-, and Rho-dependent pathways, downstream of the engineered receptors. For the human pseudogene GPR33, we resurrect a signaling function that supports its hypothesized role as a pathogen entry site. These results demonstrate that substituting unknown chemical activators with a light switch can reveal information about protein function and provide an optically controlled protein library for exploring the physiology and therapeutic potential of understudied GPCRs. G-protein coupled receptors (GPCRs) represent the largest receptor family and are prime drug targets, but many orphan GPCRs are poorly characterized. Here authors engineer human orphan GPCRs to be activated by light which allows studying the receptors ligand identity and downstream signaling.
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65
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Akbari A, Khalili-Fomeshi M, Ashrafpour M, Moghadamnia AA, Ghasemi-Kasman M. Adenosine A 2A receptor blockade attenuates spatial memory deficit and extent of demyelination areas in lyolecithin-induced demyelination model. Life Sci 2018; 205:63-72. [PMID: 29730168 DOI: 10.1016/j.lfs.2018.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 04/21/2018] [Accepted: 05/03/2018] [Indexed: 12/16/2022]
Abstract
In recent years, inactivation of A2A adenosine receptors has been emerged as a novel strategy for treatment of several neurodegenerative diseases. Although numerous studies have shown the beneficial effects of A2A receptors blockade on spatial memory, the impacts of selective adenosine A2A receptors on memory performance has not yet been examined in the context of demyelination. In the present study, we evaluated the effect of A2A receptor antagonist SCH58261 on spatial memory and myelination in an experimental model of focal demyelination in rat fimbria. Demyelination was induced by local injection of lysolecithin (LPC) 1% (2 μl) into the hippocampus fimbria. SCH58261 (20 μg/0.5 μl or 40 μg/0.5 μl) was daily injected intracerebroventricularly (i.c.v.) for 10 days post LPC injection. The Morris water maze test was used to assess the spatial learning and memory on day 6 post lesion. Myelin staining and immunostaining against astrocytes/microglia were carried out 10 days post LPC injection. The administration of adenosine A2A receptor antagonist prevented the spatial memory impairment in LPC receiving animals. Myelin staining revealed that application of SCH58261 reduces the extent of demyelination areas in the fimbria. Furthermore, the level of astrocytes and microglia activation was attenuated following administration of A2A receptor antagonist. Collectively, the results of this study suggest that A2A receptor blockade can improve the spatial memory and protect myelin sheath, which might be considered as a novel therapeutic approach for multiple sclerosis disease.
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Affiliation(s)
- Atefeh Akbari
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
| | | | - Manouchehr Ashrafpour
- Neuroscience Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran; Department of Physiology, Faculty of Medical Sciences, Babol University of Medical Sciences, Babol, Iran
| | - Ali Akbar Moghadamnia
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran; Department of Pharmacology, Faculty of Medical Sciences, Babol University of Medical Sciences, Babol, Iran
| | - Maryam Ghasemi-Kasman
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran; Neuroscience Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
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66
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Zheng W, Zhou J, Luan Y, Yang J, Ge Y, Wang M, Wu B, Wu Z, Chen X, Li F, Li Z, Vakal S, Guo W, Chen JF. Spatiotemporal Control of GPR37 Signaling and Its Behavioral Effects by Optogenetics. Front Mol Neurosci 2018; 11:95. [PMID: 29643766 PMCID: PMC5882850 DOI: 10.3389/fnmol.2018.00095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/12/2018] [Indexed: 12/18/2022] Open
Abstract
Despite the progress in deorphanization of G Protein-Coupled Receptors (GPCRs), ≈100 GPCRs are still classified as orphan receptors without identified endogenous ligands and with unknown physiological functions. The lack of endogenous ligands triggering GPCR signaling has hampered the study of orphan GPCR functions. Using GPR37 as an example, we provide here the first demonstration of the channelrhodopsin 2 (ChR2)-GPCR approach to bypass the endogenous ligand and selectively activate the orphan GPCR signal by optogenetics. Inspired by the opto-XR approach, we designed the ChR2-GPR37 chimera, in which the corresponding parts of GPR37 replaced the intracellular portions of ChR2. We showed that optogenetic activation of ChR2/opto-GPR37 elicited specific GPR37 signaling, as evidenced by reduced cAMP level, enhanced ERK phosphorylation and increased motor activity, confirming the specificity of opto-GPR37 signaling. Besides, optogenetic activation of opto-GPR37 uncovered novel aspects of GPR37 signaling (such as IP-3 signaling) and anxiety-related behavior. Optogenetic activation of opto-GPR37 permits the causal analysis of GPR37 activity in the defined cells and behavioral responses of freely moving animals. Importantly, given the evolutionarily conserved seven-helix transmembrane structures of ChR2 and orphan GPCRs, we propose that opto-GPR37 approach can be readily applied to other orphan GPCRs for their deorphanization in freely moving animals.
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Affiliation(s)
- Wu Zheng
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Optometry & Vision Science, Wenzhou, China
| | - Jianhong Zhou
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Optometry & Vision Science, Wenzhou, China
| | - Yanan Luan
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jianglan Yang
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yuanyuan Ge
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Muran Wang
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Beibei Wu
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zhongnan Wu
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xingjun Chen
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Optometry & Vision Science, Wenzhou, China
| | - Fei Li
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zhihui Li
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Optometry & Vision Science, Wenzhou, China
| | - Sergii Vakal
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Wei Guo
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Optometry & Vision Science, Wenzhou, China
| | - Jiang-Fan Chen
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Optometry & Vision Science, Wenzhou, China.,Department of Neurology, Boston University School of Medicine, Boston University, Boston, MA, United States
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67
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Li Z, Chen X, Wang T, Gao Y, Li F, Chen L, Xue J, He Y, Li Y, Guo W, Zheng W, Zhang L, Ye F, Ren X, Feng Y, Chan P, Chen JF. The Corticostriatal Adenosine A 2A Receptor Controls Maintenance and Retrieval of Spatial Working Memory. Biol Psychiatry 2018; 83:530-541. [PMID: 28941549 DOI: 10.1016/j.biopsych.2017.07.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 07/11/2017] [Accepted: 07/13/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Working memory (WM) taps into multiple executive processes including encoding, maintenance, and retrieval of information, but the molecular and circuit modulation of these WM processes remains undefined due to the lack of methods to control G protein-coupled receptor signaling with temporal resolution of seconds. METHODS By coupling optogenetic control of the adenosine A2A receptor (A2AR) signaling, the Cre-loxP-mediated focal A2AR knockdown with a delayed non-match-to-place (DNMTP) task, we investigated the effect of optogenetic activation and focal knockdown of A2ARs in the dorsomedial striatum (n = 8 to 14 per group) and medial prefrontal cortex (n = 16 to 22 per group) on distinct executive processes of spatial WM. We also evaluated the therapeutic effect of the A2AR antagonist KW6002 on delayed match-to-sample/place tasks in 6 normal and 6 MPTP-treated cynomolgus monkeys. RESULTS Optogenetic activation of striatopallidal A2ARs in the dorsomedial striatum selectively at the delay and choice (not sample) phases impaired DNMTP performance. Optogenetic activation of A2ARs in the medial prefrontal cortex selectively at the delay (not sample or choice) phase improved DNMTP performance. The corticostriatal A2AR control of spatial WM was specific for a novel but not well-trained DNMTP task. Focal dorsomedial striatum A2AR knockdown or KW6002 improved DNMTP performance in mice. Last, KW6002 improved spatial WM in delayed match-to-sample and delayed match-to-place tasks of normal and dopamine-depleted cynomolgus monkeys. CONCLUSIONS The A2ARs in striatopallidal and medial prefrontal cortex neurons exert distinctive control of WM maintenance and retrieval to achieve cognitive stability and flexibility. The procognitive effect of KW6002 in nonhuman primates provides the preclinical data to translate A2AR antagonists for improving cognitive impairments in Parkinson's disease.
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Affiliation(s)
- Zhihui Li
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Xingjun Chen
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Tao Wang
- Wincon TheraCells Biotechnologies, Nanning, China
| | - Ying Gao
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Fei Li
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Long Chen
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Jin Xue
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Yan He
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Yan Li
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Wei Guo
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Wu Zheng
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Liping Zhang
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Fenfen Ye
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Xiangpeng Ren
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China
| | - Yue Feng
- Wincon TheraCells Biotechnologies, Nanning, China; Department of Neurobiology, Beijing Institute of Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Piu Chan
- Wincon TheraCells Biotechnologies, Nanning, China; Department of Neurobiology, Beijing Institute of Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Jiang-Fan Chen
- Molecular Pharmacology Lab, School of Optometry and Ophthalmology, Wenzhou Medical University, Wenzhou, China; Department of Neurology, School of Medicine, Boston University, Boston, Massachusetts.
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68
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Rajasundaram S. Adenosine A2A Receptor Signaling in the Immunopathogenesis of Experimental Autoimmune Encephalomyelitis. Front Immunol 2018; 9:402. [PMID: 29559972 PMCID: PMC5845642 DOI: 10.3389/fimmu.2018.00402] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 02/13/2018] [Indexed: 12/19/2022] Open
Abstract
Our increasing appreciation of adenosine as an endogenous signaling molecule that terminates inflammation has generated excitement regarding the potential to target adenosine receptors (ARs) in the treatment of multiple sclerosis (MS), a disease of chronic neuroinflammation. Of the four G protein-coupled ARs, A2ARs are the principal mediator of adenosine’s anti-inflammatory effects and accordingly, there is a growing body of evidence surrounding the role of A2ARs in experimental autoimmune encephalomyelitis (EAE), the dominant animal model of MS. Such evidence points to a complex, often paradoxical role for A2ARs in the immunopathogenesis of EAE, where they have the ability to both exacerbate and alleviate disease severity. This review seeks to interpret these paradoxical findings and evaluate the therapeutic promise of A2ARs. In essence, the complexities of A2AR signaling arise from two properties. Firstly, A2AR signaling downregulates the inflammatory potential of TH lymphocytes whilst simultaneously facilitating the recruitment of these cells into the CNS. Secondly, A2AR expression by myeloid cells – infiltrating macrophages and CNS-resident microglia – has the capacity to promote both tissue injury and repair in chronic neuroinflammation. Consequently, the therapeutic potential of targeting A2ARs is greatly undermined by the risk of collateral tissue damage in the periphery and/or CNS.
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69
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Impact of Coffee and Cacao Purine Metabolites on Neuroplasticity and Neurodegenerative Disease. Neurochem Res 2018; 44:214-227. [PMID: 29417473 DOI: 10.1007/s11064-018-2492-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/31/2018] [Accepted: 02/02/2018] [Indexed: 12/20/2022]
Abstract
Increasing evidence suggests that regular consumption of coffee, tea and dark chocolate (cacao) can promote brain health and may reduce the risk of age-related neurodegenerative disorders. However, the complex array of phytochemicals in coffee and cacao beans and tea leaves has hindered a clear understanding of the component(s) that affect neuronal plasticity and resilience. One class of phytochemicals present in relatively high amounts in coffee, tea and cacao are methylxanthines. Among such methylxanthines, caffeine has been the most widely studied and has clear effects on neuronal network activity, promotes sustained cognitive performance and can protect neurons against dysfunction and death in animal models of stroke, Alzheimer's disease and Parkinson's disease. Caffeine's mechanism of action relies on antagonism of various subclasses of adenosine receptors. Downstream xanthine metabolites, such as theobromine and theophylline, may also contribute to the beneficial effects of coffee, tea and cacao on brain health.
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70
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Orr AG, Lo I, Schumacher H, Ho K, Gill M, Guo W, Kim DH, Knox A, Saito T, Saido TC, Simms J, Toddes C, Wang X, Yu GQ, Mucke L. Istradefylline reduces memory deficits in aging mice with amyloid pathology. Neurobiol Dis 2018; 110:29-36. [PMID: 29100987 PMCID: PMC5747997 DOI: 10.1016/j.nbd.2017.10.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/26/2017] [Accepted: 10/27/2017] [Indexed: 12/20/2022] Open
Abstract
Adenosine A2A receptors are putative therapeutic targets for neurological disorders. The adenosine A2A receptor antagonist istradefylline is approved in Japan for Parkinson's disease and is being tested in clinical trials for this condition elsewhere. A2A receptors on neurons and astrocytes may contribute to Alzheimer's disease (AD) by impairing memory. However, it is not known whether istradefylline enhances cognitive function in aging animals with AD-like amyloid plaque pathology. Here, we show that elevated levels of Aβ, C-terminal fragments of the amyloid precursor protein (APP), or amyloid plaques, but not overexpression of APP per se, increase astrocytic A2A receptor levels in the hippocampus and neocortex of aging mice. Moreover, in amyloid plaque-bearing mice, low-dose istradefylline treatment enhanced spatial memory and habituation, supporting the conclusion that, within a well-defined dose range, A2A receptor blockers might help counteract memory problems in patients with Alzheimer's disease.
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Affiliation(s)
- Anna G Orr
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Department of Neurology, University of California, San Francisco, CA 94158, USA.
| | - Iris Lo
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Heike Schumacher
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Kaitlyn Ho
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Michael Gill
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Weikun Guo
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Daniel H Kim
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Anthony Knox
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Takashi Saito
- Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
| | - Jeffrey Simms
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Carlee Toddes
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Xin Wang
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Gui-Qiu Yu
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA
| | - Lennart Mucke
- Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Department of Neurology, University of California, San Francisco, CA 94158, USA.
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71
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Krania P, Dimou E, Bantouna M, Kouvaros S, Tsiamaki E, Papatheodoropoulos C, Sarantis K, Angelatou F. Adenosine A 2A receptors are required for glutamate mGluR5- and dopamine D1 receptor-evoked ERK1/2 phosphorylation in rat hippocampus: involvement of NMDA receptor. J Neurochem 2018; 145:217-231. [PMID: 29205377 DOI: 10.1111/jnc.14268] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 10/11/2017] [Accepted: 11/24/2017] [Indexed: 12/17/2022]
Abstract
Interaction between mGluR5 and NMDA receptors (NMDAR) is vital for synaptic plasticity and cognition. We recently demonstrated that stimulation of mGluR5 enhances NMDAR responses in hippocampus by phosphorylating NR2B(Tyr1472) subunit, and this reaction was enabled by adenosine A2A receptors (A2A R) (J Neurochem, 135, 2015, 714). In this study, by using in vitro phosphorylation and western blot analysis in hippocampal slices of male Wistar rats, we show that mGluR5 stimulation or mGluR5/NMDARs co-stimulation synergistically activate ERK1/2 signaling leading to c-Fos expression. Interestingly, both reactions are under the permissive control of endogenous adenosine acting through A2A Rs. Moreover, mGluR5-mediated ERK1/2 phosphorylation depends on NMDAR, which however exhibits a metabotropic way of function, since no ion influx through its ion channel is required. Furthermore, our results demonstrate that mGluR5 and mGluR5/NMDAR-evoked ERK1/2 activation correlates well with the mGluR5/NMDAR-evoked NR2B(Tyr1472) phosphorylation, since both phenomena coincide temporally, are Src dependent, and are both enabled by A2A Rs. This indicates a functional involvement of NR2B(Tyr1472) phosphorylation in the ERK1/2 activation. Our biochemical results are supported by electrophysiological data showing that in CA1 region of hippocampus, the theta burst stimulation (TBS)-induced long-term potentiation coincides temporally with an increase in ERK1/2 activation and both phenomena are dependent on the tripartite A2A , mGlu5, and NMDARs. Furthermore, we show that the dopamine D1 receptors evoked ERK1/2 activation as well as the NR2B(Tyr1472) phosphorylation are also regulated by endogenous adenosine and A2A Rs. In conclusion, our results highlight the A2A Rs as a crucial regulator not only for NMDAR responses, but also for regulating ERK1/2 signaling and its downstream pathways, leading to gene expression, synaptic plasticity, and memory consolidation.
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Affiliation(s)
- Paraskevi Krania
- Physiology Department, Medical School, University of Patras, Patras, Greece
| | - Eleni Dimou
- Physiology Department, Medical School, University of Patras, Patras, Greece
| | - Maria Bantouna
- Physiology Department, Medical School, University of Patras, Patras, Greece
| | - Stylianos Kouvaros
- Physiology Department, Medical School, University of Patras, Patras, Greece
| | - Eirini Tsiamaki
- Physiology Department, Medical School, University of Patras, Patras, Greece
| | | | | | - Fevronia Angelatou
- Physiology Department, Medical School, University of Patras, Patras, Greece
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72
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Eickelbeck D, Karapinar R, Herlitze S, Spoida K. Optogenetic Approaches for Controlling Neuronal Activity and Plasticity. HANDBOOK OF BEHAVIORAL NEUROSCIENCE 2018. [DOI: 10.1016/b978-0-12-812028-6.00016-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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73
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Purinergic system in psychiatric diseases. Mol Psychiatry 2018; 23:94-106. [PMID: 28948971 DOI: 10.1038/mp.2017.188] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 07/15/2017] [Accepted: 07/20/2017] [Indexed: 12/14/2022]
Abstract
Psychiatric disorders are debilitating diseases, affecting >80 million people worldwide. There are no causal cures for psychiatric disorders and available therapies only treat the symptoms. The etiology of psychiatric disorders is unknown, although it has been speculated to be a combination of environmental, stress and genetic factors. One of the neurotransmitter systems implicated in the biology of psychiatric disorders is the purinergic system. In this review, we performed a comprehensive search of the literature about the role and function of the purinergic system in the development and predisposition to psychiatric disorders, with a focus on depression, schizophrenia, bipolar disorder, autism, anxiety and attention deficit/hyperactivity disorder. We also describe how therapeutics used for psychiatric disorders act on the purinergic system.
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74
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Cao ZP, Dai D, Wei PJ, Han YY, Guan YQ, Li HH, Liu WX, Xiao P, Li CH. Effects of cordycepin on spontaneous alternation behavior and adenosine receptors expression in hippocampus. Physiol Behav 2017; 184:135-142. [PMID: 29174913 DOI: 10.1016/j.physbeh.2017.11.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 10/18/2017] [Accepted: 11/21/2017] [Indexed: 12/14/2022]
Abstract
Cordycepin, an adenosine analogue, has been reported to improve cognitive function. Important roles on learning and memory of adenosine and its receptors, such as adenosine A1 and A2A receptors (A1R and A2AR), also have been shown. Therefore, we assume that the improvement of learning and memory induced by cordycepin is likely related to hippocampal adenosine content and adenosine receptor density. Here we investigated the effects of cordycepin on the short-term spatial memory by using a spontaneous alternation behavior (SAB) test in Y-maze, and then examined hippocampal adenosine content and A1R and A2AR densities. We found that orally administrated cordycepin (at dosages of 5 and 10mg/kg twice daily for three weeks) significantly increased the percent of relative alternation of mice in SAB but not altered body weight, hippocampus weight and hippocampal adenosine content. Furthermore, cordycepin decreased A2AR density in hippocampal subareas; however, cordycepin only reduced the A1R density in DG but not CA1 or CA3 region. Our results suggest that cordycepin exerts a nootropic role possibly through modulating A2AR density of hippocampus, which further support the concept that it is mostly A2AR rather than A1R to control the adaptive processes of memory performance. These findings would be helpful to provide a new window into the pharmacological properties of cordycepin for cognitive promotion.
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Affiliation(s)
- Zhi-Ping Cao
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Dan Dai
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Peng-Ju Wei
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Yuan-Yuan Han
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Yan-Qing Guan
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Han-Hang Li
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Wen-Xiao Liu
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Peng Xiao
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Chu-Hua Li
- School of Life Science, South China Normal University, Guangzhou 510631, China; Brain Science Institute, South China Normal University, Guangzhou 510631, China.
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75
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Role of G Protein-Coupled Receptors in the Regulation of Structural Plasticity and Cognitive Function. Molecules 2017; 22:molecules22071239. [PMID: 28737723 PMCID: PMC6152405 DOI: 10.3390/molecules22071239] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 07/14/2017] [Indexed: 12/26/2022] Open
Abstract
Cognition and other higher brain functions are known to be intricately associated with the capacity of neural circuits to undergo structural reorganization. Structural remodelling of neural circuits, or structural plasticity, in the hippocampus plays a major role in learning and memory. Dynamic modifications of neuronal connectivity in the form of dendritic spine morphology alteration, as well as synapse formation and elimination, often result in the strengthening or weakening of specific neural circuits that determine synaptic plasticity. Changes in dendritic complexity and synapse number are mediated by cellular processes that are regulated by extracellular signals such as neurotransmitters and neurotrophic factors. As many neurotransmitters act on G protein-coupled receptors (GPCRs), it has become increasingly apparent that GPCRs can regulate structural plasticity through a myriad of G protein-dependent pathways and non-canonical signals. A thorough understanding of how GPCRs exert their regulatory influence on dendritic spine morphogenesis may provide new insights for treating cognitive impairment and decline in various age-related diseases. In this article, we review the evidence of GPCR-mediated regulation of structural plasticity, with a special emphasis on the involvement of common as well as distinct signalling pathways that are regulated by major neurotransmitters.
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76
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Eleftheriou C, Cesca F, Maragliano L, Benfenati F, Maya-Vetencourt JF. Optogenetic Modulation of Intracellular Signalling and Transcription: Focus on Neuronal Plasticity. J Exp Neurosci 2017; 11:1179069517703354. [PMID: 28579827 PMCID: PMC5415353 DOI: 10.1177/1179069517703354] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 03/02/2017] [Indexed: 12/17/2022] Open
Abstract
Several fields in neuroscience have been revolutionized by the advent of optogenetics, a technique that offers the possibility to modulate neuronal physiology in response to light stimulation. This innovative and far-reaching tool provided unprecedented spatial and temporal resolution to explore the activity of neural circuits underlying cognition and behaviour. With an exponential growth in the discovery and synthesis of new photosensitive actuators capable of modulating neuronal networks function, other fields in biology are experiencing a similar re-evolution. Here, we review the various optogenetic toolboxes developed to influence cellular physiology as well as the diverse ways in which these can be engineered to precisely modulate intracellular signalling and transcription. We also explore the processes required to successfully express and stimulate these photo-actuators in vivo before discussing how such tools can enlighten our understanding of neuronal plasticity at the systems level.
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Affiliation(s)
- Cyril Eleftheriou
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy
| | - Fabrizia Cesca
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy
| | - Luca Maragliano
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy
| | - Fabio Benfenati
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genova, Italy.,Department of Experimental Medicine, University of Genova, Genova, Italy
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77
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Endo M, Ozawa T. Strategies for development of optogenetic systems and their applications. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2017. [DOI: 10.1016/j.jphotochemrev.2016.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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78
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Gonçalves N, Simões AT, Prediger RD, Hirai H, Cunha RA, Pereira de Almeida L. Caffeine alleviates progressive motor deficits in a transgenic mouse model of spinocerebellar ataxia. Ann Neurol 2017; 81:407-418. [DOI: 10.1002/ana.24867] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 12/12/2016] [Accepted: 12/18/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Nélio Gonçalves
- Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
- Faculty of Pharmacy; University of Coimbra; Coimbra Portugal
| | - Ana T. Simões
- Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
- Faculty of Pharmacy; University of Coimbra; Coimbra Portugal
| | - Rui D. Prediger
- Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
- Department of Pharmacology; Federal University of Santa Catarina; Florianópolis, SC Brazil
| | - Hirokazu Hirai
- Department of Neurophysiology; Gunma University Graduate School of Medicine; Maebashi Gunma Japan
| | - Rodrigo A. Cunha
- Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
- Faculty of Medicine; University of Coimbra; Coimbra Portugal
| | - Luís Pereira de Almeida
- Center for Neuroscience and Cell Biology; University of Coimbra; Coimbra Portugal
- Faculty of Pharmacy; University of Coimbra; Coimbra Portugal
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79
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Spangler SM, Bruchas MR. Optogenetic approaches for dissecting neuromodulation and GPCR signaling in neural circuits. Curr Opin Pharmacol 2017; 32:56-70. [PMID: 27875804 PMCID: PMC5395328 DOI: 10.1016/j.coph.2016.11.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/29/2016] [Accepted: 11/02/2016] [Indexed: 12/19/2022]
Abstract
Optogenetics has revolutionized neuroscience by providing means to control cell signaling with spatiotemporal control in discrete cell types. In this review, we summarize four major classes of optical tools to manipulate neuromodulatory GPCR signaling: opsins (including engineered chimeric receptors); photoactivatable proteins; photopharmacology through caging-photoswitchable molecules; fluorescent protein based reporters and biosensors. Additionally, we highlight technologies to utilize these tools in vitro and in vivo, including Cre dependent viral vector expression and two-photon microscopy. These emerging techniques targeting specific members of the GPCR signaling pathway offer an expansive base for investigating GPCR signaling in behavior and disease states, in addition to paving a path to potential therapeutic developments.
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Affiliation(s)
- Skylar M Spangler
- Department of Anesthesiology, Basic Research Division, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Biology and Biomedical Sciences, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael R Bruchas
- Department of Anesthesiology, Basic Research Division, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA; Division of Biology and Biomedical Sciences, Washington University School of Medicine, St. Louis, MO 63110, USA.
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80
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Adenosine A 2A Receptors in the Amygdala Control Synaptic Plasticity and Contextual Fear Memory. Neuropsychopharmacology 2016; 41:2862-2871. [PMID: 27312408 PMCID: PMC5061896 DOI: 10.1038/npp.2016.98] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 06/08/2016] [Accepted: 06/09/2016] [Indexed: 12/21/2022]
Abstract
The consumption of caffeine modulates working and reference memory through the antagonism of adenosine A2A receptors (A2ARs) controlling synaptic plasticity processes in hippocampal excitatory synapses. Fear memory essentially involves plastic changes in amygdala circuits. However, it is unknown if A2ARs in the amygdala regulate synaptic plasticity and fear memory. We report that A2ARs in the amygdala are enriched in synapses and located to glutamatergic synapses, where they selectively control synaptic plasticity rather than synaptic transmission at a major afferent pathway to the amygdala. Notably, the downregulation of A2ARs selectively in the basolateral complex of the amygdala, using a lentivirus with a silencing shRNA (small hairpin RNA targeting A2AR (shA2AR)), impaired fear acquisition as well as Pavlovian fear retrieval. This is probably associated with the upregulation and gain of function of A2ARs in the amygdala after fear acquisition. The importance of A2ARs to control fear memory was further confirmed by the ability of SCH58261 (0.1 mg/kg; A2AR antagonist), caffeine (5 mg/kg), but not DPCPX (0.5 mg/kg; A1R antagonist), treatment for 7 days before fear conditioning onwards, to attenuate the retrieval of context fear after 24-48 h and after 7-8 days. These results demonstrate that amygdala A2ARs control fear memory and the underlying process of synaptic plasticity in this brain region. This provides a neurophysiological basis for the association between A2AR polymorphisms and phobia or panic attacks in humans and prompts a therapeutic interest in A2ARs to manage fear-related pathologies.
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81
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Cunha RA. How does adenosine control neuronal dysfunction and neurodegeneration? J Neurochem 2016; 139:1019-1055. [PMID: 27365148 DOI: 10.1111/jnc.13724] [Citation(s) in RCA: 312] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 05/23/2016] [Accepted: 06/23/2016] [Indexed: 12/11/2022]
Abstract
The adenosine modulation system mostly operates through inhibitory A1 (A1 R) and facilitatory A2A receptors (A2A R) in the brain. The activity-dependent release of adenosine acts as a brake of excitatory transmission through A1 R, which are enriched in glutamatergic terminals. Adenosine sharpens salience of information encoding in neuronal circuits: high-frequency stimulation triggers ATP release in the 'activated' synapse, which is locally converted by ecto-nucleotidases into adenosine to selectively activate A2A R; A2A R switch off A1 R and CB1 receptors, bolster glutamate release and NMDA receptors to assist increasing synaptic plasticity in the 'activated' synapse; the parallel engagement of the astrocytic syncytium releases adenosine further inhibiting neighboring synapses, thus sharpening the encoded plastic change. Brain insults trigger a large outflow of adenosine and ATP, as a danger signal. A1 R are a hurdle for damage initiation, but they desensitize upon prolonged activation. However, if the insult is near-threshold and/or of short-duration, A1 R trigger preconditioning, which may limit the spread of damage. Brain insults also up-regulate A2A R, probably to bolster adaptive changes, but this heightens brain damage since A2A R blockade affords neuroprotection in models of epilepsy, depression, Alzheimer's, or Parkinson's disease. This initially involves a control of synaptotoxicity by neuronal A2A R, whereas astrocytic and microglia A2A R might control the spread of damage. The A2A R signaling mechanisms are largely unknown since A2A R are pleiotropic, coupling to different G proteins and non-canonical pathways to control the viability of glutamatergic synapses, neuroinflammation, mitochondria function, and cytoskeleton dynamics. Thus, simultaneously bolstering A1 R preconditioning and preventing excessive A2A R function might afford maximal neuroprotection. The main physiological role of the adenosine modulation system is to sharp the salience of information encoding through a combined action of adenosine A2A receptors (A2A R) in the synapse undergoing an alteration of synaptic efficiency with an increased inhibitory action of A1 R in all surrounding synapses. Brain insults trigger an up-regulation of A2A R in an attempt to bolster adaptive plasticity together with adenosine release and A1 R desensitization; this favors synaptotocity (increased A2A R) and decreases the hurdle to undergo degeneration (decreased A1 R). Maximal neuroprotection is expected to result from a combined A2A R blockade and increased A1 R activation. This article is part of a mini review series: "Synaptic Function and Dysfunction in Brain Diseases".
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Affiliation(s)
- Rodrigo A Cunha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,FMUC-Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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82
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Yu XW, Oh MM, Disterhoft JF. CREB, cellular excitability, and cognition: Implications for aging. Behav Brain Res 2016; 322:206-211. [PMID: 27478142 DOI: 10.1016/j.bbr.2016.07.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/11/2016] [Accepted: 07/27/2016] [Indexed: 10/21/2022]
Abstract
Humans and laboratory animals display cognitive deficits as they age. However, there are currently no effective therapies available to treat these deficits, as the underlying mechanisms are poorly understood. Studies using pharmacological compounds have found a link between cognitive performance and the intrinsic cellular excitability of CA1 hippocampal neurons. Therefore, it is of great interest to identify molecular regulators that may be influencing both cognition and neuronal excitability, which could be changed with age. One possible regulator is the transcription factor cAMP response element binding-protein (CREB). In young adult animals, manipulation of CREB activity has resulted in modulation of both cognitive performance on behavioral tasks, and neuronal excitability. While evidence is sparse, studies also point to a dysfunction in CREB signaling with aging. We propose that CREB may be a viable therapeutic target for the treatment of age-related cognitive deficits, along with potential experiments to test this hypothesis.
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Affiliation(s)
- Xiao-Wen Yu
- Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 E Chicago Avenue, Chicago, IL 60611, USA.
| | - M Matthew Oh
- Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 E Chicago Avenue, Chicago, IL 60611, USA.
| | - John F Disterhoft
- Department of Physiology, Feinberg School of Medicine, Northwestern University, 303 E Chicago Avenue, Chicago, IL 60611, USA.
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83
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Hu Q, Ren X, Liu Y, Li Z, Zhang L, Chen X, He C, Chen JF. Aberrant adenosine A2A receptor signaling contributes to neurodegeneration and cognitive impairments in a mouse model of synucleinopathy. Exp Neurol 2016; 283:213-23. [PMID: 27342081 DOI: 10.1016/j.expneurol.2016.05.040] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/21/2016] [Accepted: 05/23/2016] [Indexed: 02/08/2023]
Abstract
Synucleinopathy is characterized by abnormal accumulation of misfolded α-synuclein (α-Syn)-positive cytoplasmic inclusions and by neurodegeneration and cognitive impairments, but the pathogenesis mechanism of synucleinopathy remains to be defined. Using a transmission model of synucleinopathy by intracerebral injection of preformed A53T α-Syn fibrils, we investigated whether aberrant adenosine A2A receptor (A2AR) signaling contributed to pathogenesis of synucleinopathy. We demonstrated that intra-hippocampal injection of preformed mutant α-Syn fibrils triggered a striking and selective induction of A2AR expression which was closely co-localized with pSer129 α-Syn-rich inclusions in neurons and glial cells of hippocampus. Importantly, by abolishing aberrant A2AR signaling triggered by mutant α-Syn, genetic deletion of A2ARs blunted a cascade of pathological events leading to synucleinopathy, including pSer129 α-Syn-rich and p62-positive aggregates, NF-κB activation and astrogliosis, apoptotic neuronal cell death and working memory deficits without affecting motor activity. These findings define α-Syn-triggered aberrant A2AR signaling as a critical pathogenesis mechanism of synucleinopathy with dual controls of cognition and neurodegeneration by modulating α-Syn aggregates. Thus, aberrant A2AR signaling represents a useful biomarker as well as a therapeutic target of synucleinopathy.
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Affiliation(s)
- Qidi Hu
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiangpeng Ren
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health, China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China.
| | - Ya Liu
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhihui Li
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health, China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Liping Zhang
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health, China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China
| | - Xingjun Chen
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Chaoxiang He
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jiang-Fan Chen
- Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China; State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health, China and Zhejiang Provincial Key Laboratory of Ophthalmology and Optometry, Wenzhou, Zhejiang, China; Department of Neurology, Boston University School of Medicine, Boston, MA, United States.
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84
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Viana da Silva S, Haberl MG, Zhang P, Bethge P, Lemos C, Gonçalves N, Gorlewicz A, Malezieux M, Gonçalves FQ, Grosjean N, Blanchet C, Frick A, Nägerl UV, Cunha RA, Mulle C. Early synaptic deficits in the APP/PS1 mouse model of Alzheimer's disease involve neuronal adenosine A2A receptors. Nat Commun 2016; 7:11915. [PMID: 27312972 PMCID: PMC4915032 DOI: 10.1038/ncomms11915] [Citation(s) in RCA: 163] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/12/2016] [Indexed: 01/24/2023] Open
Abstract
Synaptic plasticity in the autoassociative network of recurrent connections among hippocampal CA3 pyramidal cells is thought to enable the storage of episodic memory. Impaired episodic memory is an early manifestation of cognitive deficits in Alzheimer's disease (AD). In the APP/PS1 mouse model of AD amyloidosis, we show that associative long-term synaptic potentiation (LTP) is abolished in CA3 pyramidal cells at an early stage. This is caused by activation of upregulated neuronal adenosine A2A receptors (A2AR) rather than by dysregulation of NMDAR signalling or altered dendritic spine morphology. Neutralization of A2AR by acute pharmacological inhibition, or downregulation driven by shRNA interference in a single postsynaptic neuron restore associative CA3 LTP. Accordingly, treatment with A2AR antagonists reverts one-trial memory deficits. These results provide mechanistic support to encourage testing the therapeutic efficacy of A2AR antagonists in early AD patients.
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MESH Headings
- Adenosine A2 Receptor Antagonists/pharmacology
- Alzheimer Disease/drug therapy
- Alzheimer Disease/genetics
- Alzheimer Disease/metabolism
- Alzheimer Disease/physiopathology
- Amyloid beta-Protein Precursor/genetics
- Amyloid beta-Protein Precursor/metabolism
- Animals
- CA3 Region, Hippocampal/drug effects
- CA3 Region, Hippocampal/metabolism
- CA3 Region, Hippocampal/pathology
- Dendritic Spines/drug effects
- Dendritic Spines/metabolism
- Dendritic Spines/ultrastructure
- Disease Models, Animal
- Gene Expression Regulation
- Humans
- Long-Term Potentiation
- Memory, Episodic
- Mice
- Mice, Transgenic
- Neuroprotective Agents/pharmacology
- Presenilin-1/genetics
- Presenilin-1/metabolism
- Pyrimidines/pharmacology
- RNA, Small Interfering/genetics
- RNA, Small Interfering/metabolism
- Receptor, Adenosine A2A/genetics
- Receptor, Adenosine A2A/metabolism
- Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors
- Receptors, N-Methyl-D-Aspartate/genetics
- Receptors, N-Methyl-D-Aspartate/metabolism
- Signal Transduction
- Synapses/drug effects
- Synapses/metabolism
- Synapses/ultrastructure
- Triazines/pharmacology
- Triazoles/pharmacology
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Affiliation(s)
- Silvia Viana da Silva
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
- BEB PhD program CNC Coimbra, 3004-517 Coimbra, Portugal
| | | | - Pei Zhang
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Philipp Bethge
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Cristina Lemos
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Nélio Gonçalves
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Adam Gorlewicz
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Meryl Malezieux
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Francisco Q. Gonçalves
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Noëlle Grosjean
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Christophe Blanchet
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Andreas Frick
- University of Bordeaux, Neurocentre Magendie, INSERM U862, F-33000 Bordeaux, France
| | - U Valentin Nägerl
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
| | - Rodrigo A. Cunha
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Christophe Mulle
- Interdisciplinary Institute for Neuroscience, University of Bordeaux, CNRS UMR 5297, F-33000 Bordeaux, France
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85
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Li Y, He Y, Chen M, Pu Z, Chen L, Li P, Li B, Li H, Huang ZL, Li Z, Chen JF. Optogenetic Activation of Adenosine A2A Receptor Signaling in the Dorsomedial Striatopallidal Neurons Suppresses Goal-Directed Behavior. Neuropsychopharmacology 2016; 41:1003-13. [PMID: 26216520 PMCID: PMC4748425 DOI: 10.1038/npp.2015.227] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 07/05/2015] [Accepted: 07/21/2015] [Indexed: 01/06/2023]
Abstract
The striatum has an essential role in neural control of instrumental behaviors by reinforcement learning. Adenosine A(2A) receptors (A(2A)Rs) are highly enriched in the striatopallidal neurons and are implicated in instrumental behavior control. However, the temporal importance of the A(2A)R signaling in relation to the reward and specific contributions of the striatopallidal A(2A)Rs in the dorsolateral striatum (DLS) and the dorsomedial striatum (DMS) to the control of instrumental learning are not defined. Here, we addressed temporal relationship and sufficiency of transient activation of optoA(2A)R signaling precisely at the time of the reward to the control of instrumental learning, using our newly developed rhodopsin-A2AR chimeras (optoA(2A)R). We demonstrated that transient light activation of optoA(2A)R signaling in the striatopallidal neurons in 'time-locked' manner with the reward delivery (but not random optoA(2A)R activation) was sufficient to change the animal's sensitivity to outcome devaluation without affecting the acquisition or extinction phases of instrumental learning. We further demonstrated that optogenetic activation of striatopallidal A(2A)R signaling in the DMS suppressed goal-directed behaviors, as focally genetic knockdown of striatopallidal A(2A)Rs in the DMS enhanced goal-directed behavior by the devaluation test. By contrast, optogenetic activation or focal AAV-Cre-mediated knockdown of striatopallidal A(2A)R in the DLS had relatively limited effects on instrumental learning. Thus, the striatopallidal A(2A)R signaling in the DMS exerts inhibitory and predominant control of goal-directed behavior by acting precisely at the time of reward, and may represent a therapeutic target to reverse abnormal habit formation that is associated with compulsive obsessive disorder and drug addiction.
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Affiliation(s)
- Yan Li
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yan He
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Mozi Chen
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhilan Pu
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Li Chen
- Department of Pharmacology, Fudan University Shanghai Medical College, Shanghai, China
| | - Ping Li
- Molecular Biology Center, Research Institute of Surgery and Daping Hospital, Third Military Medical University, Chongqing, China
| | - Bo Li
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Haiyan Li
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhi-Li Huang
- Department of Pharmacology, Fudan University Shanghai Medical College, Shanghai, China
| | - Zhihui Li
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jiang-Fan Chen
- The Institute of Molecular Medicine, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Department of Neurology, Boston University, School of Medicine, Boston, MA, USA
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86
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Caffeine Reverts Memory But Not Mood Impairment in a Depression-Prone Mouse Strain with Up-Regulated Adenosine A2A Receptor in Hippocampal Glutamate Synapses. Mol Neurobiol 2016; 54:1552-1563. [DOI: 10.1007/s12035-016-9774-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Accepted: 02/02/2016] [Indexed: 12/14/2022]
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87
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Rial D, Lemos C, Pinheiro H, Duarte JM, Gonçalves FQ, Real JI, Prediger RD, Gonçalves N, Gomes CA, Canas PM, Agostinho P, Cunha RA. Depression as a Glial-Based Synaptic Dysfunction. Front Cell Neurosci 2016; 9:521. [PMID: 26834566 PMCID: PMC4722129 DOI: 10.3389/fncel.2015.00521] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 12/27/2015] [Indexed: 01/23/2023] Open
Abstract
Recent studies combining pharmacological, behavioral, electrophysiological and molecular approaches indicate that depression results from maladaptive neuroplastic processes occurring in defined frontolimbic circuits responsible for emotional processing such as the prefrontal cortex, hippocampus, amygdala and ventral striatum. However, the exact mechanisms controlling synaptic plasticity that are disrupted to trigger depressive conditions have not been elucidated. Since glial cells (astrocytes and microglia) tightly and dynamically interact with synapses, engaging a bi-directional communication critical for the processing of synaptic information, we now revisit the role of glial cells in the etiology of depression focusing on a dysfunction of the “quad-partite” synapse. This interest is supported by the observations that depressive-like conditions are associated with a decreased density and hypofunction of astrocytes and with an increased microglia “activation” in frontolimbic regions, which is expected to contribute for the synaptic dysfunction present in depression. Furthermore, the traditional culprits of depression (glucocorticoids, biogenic amines, brain-derived neurotrophic factor, BDNF) affect glia functioning, whereas antidepressant treatments (serotonin-selective reuptake inhibitors, SSRIs, electroshocks, deep brain stimulation) recover glia functioning. In this context of a quad-partite synapse, systems modulating glia-synapse bidirectional communication—such as the purinergic neuromodulation system operated by adenosine 5′-triphosphate (ATP) and adenosine—emerge as promising candidates to “re-normalize” synaptic function by combining direct synaptic effects with an ability to also control astrocyte and microglia function. This proposed triple action of purines to control aberrant synaptic function illustrates the rationale to consider the interference with glia dysfunction as a mechanism of action driving the design of future pharmacological tools to manage depression.
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Affiliation(s)
- Daniel Rial
- CNC - Center for Neuroscience and Cell Biology, University of CoimbraCoimbra, Portugal; Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SCBrazil
| | - Cristina Lemos
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Helena Pinheiro
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Joana M Duarte
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Francisco Q Gonçalves
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Joana I Real
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Rui D Prediger
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC Brazil
| | - Nélio Gonçalves
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Catarina A Gomes
- CNC - Center for Neuroscience and Cell Biology, University of CoimbraCoimbra, Portugal; Faculty of Medicine, University of CoimbraCoimbra, Portugal
| | - Paula M Canas
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal
| | - Paula Agostinho
- CNC - Center for Neuroscience and Cell Biology, University of CoimbraCoimbra, Portugal; Faculty of Medicine, University of CoimbraCoimbra, Portugal
| | - Rodrigo A Cunha
- CNC - Center for Neuroscience and Cell Biology, University of CoimbraCoimbra, Portugal; Faculty of Medicine, University of CoimbraCoimbra, Portugal
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88
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Onaolapo AY, Onaolapo OJ. Caffeine's influence on object recognition and working-memory in prepubertal mice and its modulation by gender. ACTA ACUST UNITED AC 2015; 22:223-30. [PMID: 26419431 DOI: 10.1016/j.pathophys.2015.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 09/07/2015] [Accepted: 09/14/2015] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This study investigated the effects of intraperitoneal injection of caffeine on Y-maze working-memory and novel object recognition (NOR) in prepubertal mice. METHODOLOGY Y-maze spontaneous alternation and a novel object recognition test (consisting of acclimation, acquisition and test phases) were performed. Mice received a single dose of caffeine (10, 20, 40, 80 and 120mgkg(-1) i.p.) or vehicle, 30min before Y-maze exploration. For the NOR test, caffeine was given 30min before training and another dose 30min before test phase. RESULTS NOR time (acquisition phase) increased significantly in males at all doses of caffeine and decreased in females at 10, 20 and 40mg/kg compared to vehicle; during the test phase, novel object exploration time decreased significantly in males and increased in females at 10 and 20mg/kg only to decrease again at 120mg/kg. Recognition index decreased in males and increased in females while, males showed poor discrimination between novel and familiar objects compared to vehicle; while females showed increased discrimination between novel and familiar object at 10, 20,40 and 80mg/kg and a decrease at 120mg/kg. Y-maze spontaneous alternation improved significantly in males at 10 and 40mg/kg and decreased at 20 and 120mg/kg in females. CONCLUSION The findings suggest that acute caffeine injection improves non-spatial memory retention in female mice but not in males; spatial working-memory is however improved in males but not in females.
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Affiliation(s)
- Adejoke Yetunde Onaolapo
- Department of Human Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, Ladoke Akintola University of Technology, Ogbomosho, Oyo State, Nigeria
| | - Olakunle James Onaolapo
- Department of Pharmacology, Faculty of Basic Medical Sciences, College of Health Sciences, Ladoke Akintola University of Technology, Osogbo, Osun State, Nigeria.
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Abstract
Over the past 10 years, the development and convergence of microbial opsin engineering, modular genetic methods for cell-type targeting and optical strategies for guiding light through tissue have enabled versatile optical control of defined cells in living systems, defining modern optogenetics. Despite widespread recognition of the importance of spatiotemporally precise causal control over cellular signaling, for nearly the first half (2005-2009) of this 10-year period, as optogenetics was being created, there were difficulties in implementation, few publications and limited biological findings. In contrast, the ensuing years have witnessed a substantial acceleration in the application domain, with the publication of thousands of discoveries and insights into the function of nervous systems and beyond. This Historical Commentary reflects on the scientific landscape of this decade-long transition.
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Affiliation(s)
- Karl Deisseroth
- Departments of Bioengineering and of Psychiatry and Behavioral Sciences and the Howard Hughes Medical Institute, Stanford University, Stanford, California, USA
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