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Gopnar VV, Rakshit D, Bandakinda M, Kulhari U, Sahu BD, Mishra A. Fisetin attenuates arsenic and fluoride subacute co-exposure induced neurotoxicity via regulating TNF-α mediated activation of NLRP3 inflammasome. Neurotoxicology 2023:S0161-813X(23)00086-4. [PMID: 37331635 DOI: 10.1016/j.neuro.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/29/2023] [Accepted: 06/14/2023] [Indexed: 06/20/2023]
Abstract
Groundwater is considered safe, however, the occurrence of contaminants like arsenic and fluoride has raised a major healthcare concern. Clinical studies suggested that arsenic and fluoride co-exposure induced neurotoxicity, however efforts to explore safe and effective management of such neurotoxicity are limited. Therefore, we investigated the ameliorative effect of Fisetin against arsenic and fluoride subacute co-exposure-induced neurotoxicity, and associated biochemical and molecular changes. Male BALB/c mice Arsenic (NaAsO2: 50mg/L) and fluoride (NaF: 50mg/L) were exposed to drinking water and fisetin (5, 10, and 20mg/kg/day) was administered orally for 28 days. The neurobehavioral changes were recorded in the open field, rotarod, grip strength, tail suspension, forced swim, and novel object recognition test. The co-exposure resulted in anxiety-like behaviour, loss of motor coordination, depression-like behaviour, and loss of novelty-based memory, along with enhanced prooxidant, inflammatory markers and loss of cortical and hippocampal neurons. The treatment with fisetin reversed the co-exposure-induced neurobehavioral deficit along with restoration of redox & inflammatory milieu, and cortical and hippocampal neuronal density. Apart from antioxidants, inhibition of TNF-α/ NLRP3 expression has been suggested as one of the plausible neuroprotective mechanisms of Fisetin in this study.
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Affiliation(s)
- Vitthal V Gopnar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Debarati Rakshit
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Mounisha Bandakinda
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Uttam Kulhari
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Bidya Dhar Sahu
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India
| | - Awanish Mishra
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) - Guwahati, Changsari, Kamrup, Assam - 781101, India.
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Obray JD, Small CA, Baldwin EK, Jang EY, Lee JG, Yang CH, Yorgason JT, Steffensen SC. Dopamine D2-Subtype Receptors Outside the Blood-Brain Barrier Mediate Enhancement of Mesolimbic Dopamine Release and Conditioned Place Preference by Intravenous Dopamine. Front Cell Neurosci 2022; 16:944243. [PMID: 35903367 PMCID: PMC9314669 DOI: 10.3389/fncel.2022.944243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 06/17/2022] [Indexed: 11/26/2022] Open
Abstract
Dopamine (DA) is a cell-signaling molecule that does not readily cross the blood-brain barrier. Despite this, peripherally administered DA enhances DA levels in the nucleus accumbens and alters DA-related behaviors. This study was designed to investigate whether DA subtype-2 receptors are involved in the enhancement of nucleus accumbens (NAc) DA levels elicited by intravenous DA administration. This was accomplished by using microdialysis in the NAc and extracellular single unit recordings of putative DA neurons in the ventral tegmental area (VTA). Additionally, the reinforcing properties of intravenous DA were investigated using a place conditioning paradigm and the effects of intravenous DA on ultrasonic vocalizations were assessed. Following administration of intravenous dopamine, the firing rate of putative DA neurons in the VTA displayed a biphasic response and DA levels in the nucleus accumbens were enhanced. Pretreatment with domperidone, a peripheral-only DA D2 receptor (D2R) antagonist, reduced intravenous DA mediated increases in VTA DA neuron activity and NAc DA levels. Pretreatment with phentolamine, a peripheral α-adrenergic receptor antagonist, did not alter the effects of IV DA on mesolimbic DA neurotransmission. These results provide evidence for peripheral D2R mediation of the effects of intravenous DA on mesolimbic DA signaling.
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Affiliation(s)
- J. Daniel Obray
- Department of Psychology and Neuroscience, Brigham Young University, Provo, UT, United States
| | - Christina A. Small
- Department of Psychology and Neuroscience, Brigham Young University, Provo, UT, United States
| | - Emily K. Baldwin
- Department of Psychology and Neuroscience, Brigham Young University, Provo, UT, United States
| | - Eun Young Jang
- Department of Psychology and Neuroscience, Brigham Young University, Provo, UT, United States
- Research Center for Convergence Toxicology, Korea Institute of Toxicology, Daejeon, South Korea
| | - Jin Gyeom Lee
- College of Korean Medicine, Daegu Haany University, Daegu, South Korea
| | - Chae Ha Yang
- College of Korean Medicine, Daegu Haany University, Daegu, South Korea
| | - Jordan T. Yorgason
- Department of Psychology and Neuroscience, Brigham Young University, Provo, UT, United States
| | - Scott C. Steffensen
- Department of Psychology and Neuroscience, Brigham Young University, Provo, UT, United States
- *Correspondence: Scott C. Steffensen
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Verduzco-Mendoza A, Carrillo-Mora P, Avila-Luna A, Gálvez-Rosas A, Olmos-Hernández A, Mota-Rojas D, Bueno-Nava A. Role of the Dopaminergic System in the Striatum and Its Association With Functional Recovery or Rehabilitation After Brain Injury. Front Neurosci 2021; 15:693404. [PMID: 34248494 PMCID: PMC8264205 DOI: 10.3389/fnins.2021.693404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 06/03/2021] [Indexed: 01/06/2023] Open
Abstract
Disabilities are estimated to occur in approximately 2% of survivors of traumatic brain injury (TBI) worldwide, and disability may persist even decades after brain injury. Facilitation or modulation of functional recovery is an important goal of rehabilitation in all patients who survive severe TBI. However, this recovery tends to vary among patients because it is affected by the biological and physical characteristics of the patients; the types, doses, and application regimens of the drugs used; and clinical indications. In clinical practice, diverse dopaminergic drugs with various dosing and application procedures are used for TBI. Previous studies have shown that dopamine (DA) neurotransmission is disrupted following moderate to severe TBI and have reported beneficial effects of drugs that affect the dopaminergic system. However, the mechanisms of action of dopaminergic drugs have not been completely clarified, partly because dopaminergic receptor activation can lead to restoration of the pathway of the corticobasal ganglia after injury in brain structures with high densities of these receptors. This review aims to provide an overview of the functionality of the dopaminergic system in the striatum and its roles in functional recovery or rehabilitation after TBI.
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Affiliation(s)
- Antonio Verduzco-Mendoza
- Ph.D. Program in Biological and Health Sciences, Universidad Autónoma Metropolitana, Mexico City, Mexico
- Division of Biotechnology-Bioterio and Experimental Surgery, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Paul Carrillo-Mora
- Division of Neurosciences, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Alberto Avila-Luna
- Division of Neurosciences, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Arturo Gálvez-Rosas
- Division of Neurosciences, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Adriana Olmos-Hernández
- Division of Biotechnology-Bioterio and Experimental Surgery, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
| | - Daniel Mota-Rojas
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Antonio Bueno-Nava
- Division of Neurosciences, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, Mexico City, Mexico
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Guo M, Xiang T, Li M, Sun Y, Sun S, Chen D, Jia Q, Li Y, Yao X, Wang X, Zhang X, He F, Wang M. Effects of intrastriatal injection of the dopamine receptor agonist SKF38393 and quinpirole on locomotor behavior in hemiparkinsonism rats. Behav Brain Res 2021; 411:113339. [PMID: 33945831 DOI: 10.1016/j.bbr.2021.113339] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 04/29/2021] [Accepted: 04/29/2021] [Indexed: 12/27/2022]
Abstract
Dopamine (DA) in the striatum is essential to influence motor behavior and may lead to movement impairment in Parkinson's disease (PD). The present study examined the different functions of the DA D1 receptor (D1R) and DA D2 receptor (D2R) by intrastriatal injection of the D1R agonist SKF38393 and the D2R agonist quinpirole in 6-hydroxydopamine (6-OHDA)-lesioned and control rats. All rats separately underwent dose-response behavior testing for SKF38393 (0, 0.5, 1.0, and 1.5 μg/site) or quinpirole (0, 1.0, 2.0, and 3.0 μg/site) to determine the effects of the optimal modulating threshold dose. Two behavior assessment indices, the time of latency to fall and the number of steps on a rotating treadmill, were used as reliable readouts of motor stimulation variables for quantifying the motor effects of the drugs. The findings indicate that at threshold doses, SKF38393 (1.0 μg/site) and quinpirole (1.0 μg/site) produce a dose-dependent increase in locomotor activity compared to vehicle injection. The ameliorated behavioral responses to either SKF38393 or quinpirole in lesioned rats were greater than those in unlesioned control rats. Moreover, the dose-dependent increase in locomotor capacity for quinpirole was greater than that for SKF38393 in lesioned rats. These results can clarify several key issues related to DA receptors directly and may provide a basis for exploring the potential of future selective dopamine therapies for PD in humans.
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Affiliation(s)
- Mengnan Guo
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Tianyu Xiang
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Min Li
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Yue Sun
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Shuang Sun
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Dadian Chen
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Qingmei Jia
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Yuchuan Li
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China
| | - Xiaomeng Yao
- School of Nursing Qilu Institute of Technology, Jinan, 250200, People's Republic of China
| | - Xiaojun Wang
- The First Hospital Affiliated With Shandong First Medicine University, Jinan, People's Republic of China
| | - Xiao Zhang
- School of Computer Science and Technology, Shandong Jianzhu University, Jinan, 250200, People's Republic of China
| | - Feng He
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China.
| | - Min Wang
- Key Laboratory of Animal Resistance Biology of Shandong Province, College of Life Science, Shandong Normal University, Jinan, People's Republic of China.
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Toval A, Garrigos D, Kutsenko Y, Popović M, Do-Couto BR, Morales-Delgado N, Tseng KY, Ferran JL. Dopaminergic Modulation of Forced Running Performance in Adolescent Rats: Role of Striatal D1 and Extra-striatal D2 Dopamine Receptors. Mol Neurobiol 2021; 58:1782-1791. [PMID: 33394335 PMCID: PMC7932989 DOI: 10.1007/s12035-020-02252-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 12/04/2020] [Indexed: 12/24/2022]
Abstract
Improving exercise capacity during adolescence impacts positively on cognitive and motor functions. However, the neural mechanisms contributing to enhance physical performance during this sensitive period remain poorly understood. Such knowledge could help to optimize exercise programs and promote a healthy physical and cognitive development in youth athletes. The central dopamine system is of great interest because of its role in regulating motor behavior through the activation of D1 and D2 receptors. Thus, the aim of the present study is to determine whether D1 or D2 receptor signaling contributes to modulate the exercise capacity during adolescence and if this modulation takes place through the striatum. To test this, we used a rodent model of forced running wheel that we implemented recently to assess the exercise capacity. Briefly, rats were exposed to an 8-day period of habituation in the running wheel before assessing their locomotor performance in response to an incremental exercise test, in which the speed was gradually increased until exhaustion. We found that systemic administration of D1-like (SCH23390) and/or D2-like (raclopride) receptor antagonists prior to the incremental test reduced the duration of forced running in a dose-dependent manner. Similarly, locomotor activity in the open field was decreased by the dopamine antagonists. Interestingly, this was not the case following intrastriatal infusion of an effective dose of SCH23390, which decreased motor performance during the incremental test without disrupting the behavioral response in the open field. Surprisingly, intrastriatal delivery of raclopride failed to impact the duration of forced running. Altogether, these results indicate that the level of locomotor response to incremental loads of forced running in adolescent rats is dopamine dependent and mechanistically linked to the activation of striatal D1 and extra-striatal D2 receptors.
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Affiliation(s)
- Angel Toval
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia - IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Daniel Garrigos
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia - IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Yevheniy Kutsenko
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia - IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Miroljub Popović
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia - IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
| | - Bruno Ribeiro Do-Couto
- Department of Human Anatomy and Psychobiology, Faculty of Psychology, University of Murcia, Murcia, Spain
| | - Nicanor Morales-Delgado
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain
- Institute of Biomedical Research of Murcia - IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain
- Department of Histology and Anatomy, Faculty of Medicine, University Miguel Hernández, Sant Joan d'Alacant, Spain
| | - Kuei Y Tseng
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, Chicago, IL, USA
| | - José Luis Ferran
- Department of Human Anatomy and Psychobiology, Faculty of Medicine, University of Murcia, Murcia, Spain.
- Institute of Biomedical Research of Murcia - IMIB, Virgen de la Arrixaca University Hospital, University of Murcia, Murcia, Spain.
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Guilherme EM, Gianlorenço ACL. The Effects of Intravermis Cerebellar Microinjections of Dopaminergic Agents in Motor Learning and Aversive Memory Acquisition in Mice. Front Behav Neurosci 2021; 15:628357. [PMID: 33716682 PMCID: PMC7947320 DOI: 10.3389/fnbeh.2021.628357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/28/2021] [Indexed: 01/01/2023] Open
Abstract
The cerebellum receives dopaminergic innervation and expresses the five types of described dopaminergic receptors. The cerebellar function involves both motor movement and cognition, but the role of cerebellar dopaminergic system on these processes remain unclear. The present study explores the behavioral responses to intracerebellar microinjection of dopaminergic agents in motor and emotional memory. For this, naïve Swiss mice had their cerebellar vermis implanted with a guide canula, received a intravermis microinjection of Dopamine, D1-like antagonist SCH-23390 or D2-like antagonist Eticlopride, and underwent a behavioral analysis of motor learning (by a Rotarod and balance beam learning protocol) or aversive memory acquisition (by the inhibitory avoidance task). The mixed-effects analysis was used to evaluate groups performance, followed by Tukey’s post hoc when appropriated. In this study, Dopamine, SCH-23390 and Eticlopride at the doses used did not affected motor control and motor learning. In addition, the administration of Dopamine and SCH-233390 had no effects on emotional memory acquisition, but the animals that received the highest dose of Eticlopride had an improvement in aversive memory acquisition, shown by a suppression of its innate preference for the dark compartment of the inhibitory avoidance apparatus following an exposure to a foot shock. We propose that cerebellar dopaminergic D2 receptors seem to participate on the modulation of aversive memory processes, without influencing motor performance at the doses used in this study.
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Affiliation(s)
- Evelyn M Guilherme
- Laboratory of Neuroscience, Department of Physical Therapy, Center of Biological Sciences and Health, Federal University of São Carlos, São Carlos, Brazil
| | - Anna Carolyna L Gianlorenço
- Laboratory of Neuroscience, Department of Physical Therapy, Center of Biological Sciences and Health, Federal University of São Carlos, São Carlos, Brazil
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Pereira DC, Fonseca FDS, Elsangedy HM. What is the effect of vigorous exercise on the brain? Motriz: rev educ fis 2021. [DOI: 10.1590/s1980-657420210000146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Dos Santos TFO, de R Santos E, Bispo JMM, de Souza MF, de Gois AM, Lins LCRF, Silva RH, Ribeiro AM, Marchioro M, Dos Santos JR. Balance alterations and reduction of pedunculopontine cholinergic neurons in early stages of parkinsonism in middle-aged rats. Exp Gerontol 2021; 145:111198. [PMID: 33310153 DOI: 10.1016/j.exger.2020.111198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/21/2020] [Accepted: 12/07/2020] [Indexed: 12/14/2022]
Abstract
The purpose of the present study was to investigate balance alterations and the possible role of the cholinergic neurons in the pedunculopontine nucleus (PPN) in the early stages of a progressive animal model of Parkinson's disease (PD). Twenty-eight middle-aged (8-9 months) male Wistar rats received 4 or 10 subcutaneous vehicle (control, CTL) or reserpine (RES) injections (0.1 mg/kg). The animals were submitted to different behavioral tests. Forty-eight hours after the 4th injection, half of the animals of each group (n = 7) were perfused and submitted to immunohistochemical analysis for tyrosine hydroxylase (TH) and choline acetyltransferase (ChAT). The remaining animals (n = 7 per group) were killed 48 h after the 10th injection. RES group presented motor deficits in the catalepsy and open field tests starting at days 12 and 20 of treatment, respectively (only for the animals that received 10 injections). On the other hand, dynamic and static balance changes were observed at earlier stages of RES treatment, starting at days 6 and 4, respectively. At this point of the treatment, there was no decrease in the number of TH immunoreactivity neurons in the substantia nigra pars compacta (SNpc), ventral tegmental area (VTA) and dorsal striatum (DS). However, a decrease was observed in SNpc and dorsal striatum of animals that received 10 injections. In contrast, there was a decrease in the number of ChAT immunoreactive cells in PPN concomitantly to the balance alterations at the early stages of treatment (after 4 RES injections). Thus, by mimicking the progressiveness of PD, the reserpine model made it possible to identify static and dynamic balance impairments prior to the motor alterations in the catalepsy and open field tests. In addition, changes in balance were accompanied by a reduction in the number of ChAT immunoreactive cells in NPP in the early stages of treatment.
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Gálvez-Rosas A, Avila-Luna A, Valdés-Flores M, Montes S, Bueno-Nava A. GABAergic imbalance is normalized by dopamine D 1 receptor activation in the striatum contralateral to the cortical injury in motor deficit-recovered rats. Psychopharmacology (Berl) 2019; 236:2211-2222. [PMID: 30859334 DOI: 10.1007/s00213-019-05215-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 03/01/2019] [Indexed: 02/07/2023]
Abstract
RATIONALE The sensorimotor cortex and the striatum are interconnected by the corticostriatal pathway, suggesting that cortical injury alters the striatal function, which may be modulated by dopamine. OBJECTIVES We studied whether the activation of dopamine D1 receptors (D1Rs) modulates the γ-aminobutyric acid (GABA) and glutamate levels in the striatum of recovered rats at 192 h after cortical injury. METHODS The D1R agonist SKF-38393 (0, 2, 3, or 4 mg/kg) was administered at 24, 48, 96, and 192 h post-injury, and then rats were decapitated to determine GABA and glutamate levels and the levels of D1R mRNA on both sides of the striatum. RESULTS GABAergic imbalance in the striatum contralateral to the injury site was normalized by the administration of the D1R agonist, but this treatment did not produce a significant effect on glutamate levels, suggesting that glutamate was metabolized into GABA. The administration of SKF-38393 (2 mg/kg) decreased the levels of D1R mRNA in the striatum contralateral to the injury, and this effect was blocked by the coadministration of the D1R antagonist SCH-23390 (2 mg/kg). In the striatum ipsilateral to the injury, the D1R agonist increased the D1R mRNA levels, an effect that was blocked by SCH-23390. CONCLUSION The reversal of the GABAergic imbalance in the striatum contralateral to the cortical injury can be modulated by extrastriatal D1R activation, and the D1R agonist-induced increases in the D1R mRNA levels in the striatum ipsilateral to the injury suggest that the striatum may be necessary to achieve functional recovery.
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Affiliation(s)
- Arturo Gálvez-Rosas
- Lab. Neurofisiología Química de la Discapacidad, División de Neurociencias, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, SSa, Calz. México-Xochimilco 289, Col. Arenal de Guadalupe, 14389, Mexico City, Mexico
| | - Alberto Avila-Luna
- Lab. Neurofisiología Química de la Discapacidad, División de Neurociencias, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, SSa, Calz. México-Xochimilco 289, Col. Arenal de Guadalupe, 14389, Mexico City, Mexico
| | - Margarita Valdés-Flores
- Departamento de Genética y Medicina Genómica, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, SSa, Calz. México-Xochimilco 289, Col. Arenal de Guadalupe, 14389, Mexico City, Mexico
| | - Sergio Montes
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, SSa, Insurgentes Sur 3877, 14269, Mexico City, Mexico
| | - Antonio Bueno-Nava
- Lab. Neurofisiología Química de la Discapacidad, División de Neurociencias, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, SSa, Calz. México-Xochimilco 289, Col. Arenal de Guadalupe, 14389, Mexico City, Mexico.
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Mishra A, Singh S, Tiwari V, Chaturvedi S, Wahajuddin M, Shukla S. Dopamine receptor activation mitigates mitochondrial dysfunction and oxidative stress to enhance dopaminergic neurogenesis in 6-OHDA lesioned rats: A role of Wnt signalling. Neurochem Int 2019; 129:104463. [PMID: 31078578 DOI: 10.1016/j.neuint.2019.104463] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/07/2019] [Accepted: 05/09/2019] [Indexed: 02/04/2023]
Abstract
Nigral dopaminergic (DAergic) cell degeneration and depletion of dopamine neurotransmitter in the midbrain are cardinal features of Parkinson's disease (PD). Dopamine system regulates different aspects of behavioural phenotypes such as motor control, reward, anxiety and depression via acting on dopamine receptors (D1-D5). Recent studies have shown the potential effects of dopamine on modulation of neurogenesis, a process of newborn neuron formation from neural stem cells (NSCs). Reduced proliferative capacity of NSCs and net neurogenesis has been reported in subventricular zone, olfactory bulb and hippocampus of patients with PD. However, the molecular and cellular mechanism of dopamine mediated modulation of DAergic neurogenesis is not defined. In this study, we attempted to investigate the molecular mechanism of dopamine receptors mediated control of DAergic neurogenesis and whether it affects mitochondrial biogenesis in 6-hydroxydopamine (6-OHDA) induced rat model of PD-like phenotypes. Unilateral administration of 6-OHDA into medial forebrain bundle potentially reduced tyrosine hydroxylase immunoreactivity, dopamine content in substantia nigra pars compacta (SNpc) and striatum region and impaired motor functions in adult rats. We found decreased D1 receptor expression, mitochondrial biogenesis, mitochondrial functions and DAergic differentiation associated with down-regulation of Wnt/β-catenin signalling in SNpc of 6-OHDA lesioned rats. Pharmacological stimulation of D1 receptor enhanced mitochondrial biogenesis, mitochondrial functions and DAergic neurogenesis that lead to improved motor functions in 6-OHDA lesioned rats. D1 agonist induced effects were attenuated following administration of D1 antagonist, whereas shRNA mediated knockdown of Axin-2, a negative regulator of Wnt signalling significantly abolished D1 antagonist induced impairment in mitochondrial biogenesis and DAergic neurogenesis in 6-OHDA lesioned rats. Our results suggest that dopamine receptor regulates DAergic neurogenesis and mitochondrial functions by activation of Wnt/β-catenin signaling in rat model of PD-like phenotypes.
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Affiliation(s)
- Akanksha Mishra
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, UP, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Sonu Singh
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, UP, India; National Institute of Child Health and Human Development, Bethesda, MD, 20814, USA
| | - Virendra Tiwari
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, UP, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Swati Chaturvedi
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow, 226031, Uttar Pradesh, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - M Wahajuddin
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow, 226031, Uttar Pradesh, India
| | - Shubha Shukla
- Division of Pharmacology, CSIR-Central Drug Research Institute, Lucknow, UP, India; Academy of Scientific and Innovative Research, New Delhi, India.
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Pekcec A, Schülert N, Stierstorfer B, Deiana S, Dorner-Ciossek C, Rosenbrock H. Targeting the dopamine D 1 receptor or its downstream signalling by inhibiting phosphodiesterase-1 improves cognitive performance. Br J Pharmacol 2018; 175:3021-3033. [PMID: 29726015 PMCID: PMC6016630 DOI: 10.1111/bph.14350] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/08/2018] [Accepted: 04/09/2018] [Indexed: 11/30/2022] Open
Abstract
Background and Purpose Insufficient prefrontal dopamine 1 (D1) receptor signalling has been linked to cognitive dysfunction in several psychiatric conditions. Because the PDE1 isoform B (PDE1B) is postulated to regulate D1 receptor‐dependent signal transduction, in this study we aimed to elucidate the role of PDE1 in cognitive processes reliant on D1 receptor function. Experimental Approach Cognitive performance of the D1 receptor agonist, SKF38393, was studied in the T‐maze continuous alternation task and 5‐choice serial reaction time task. D1 receptor/PDE1B double‐immunohistochemistry was performed using human and rat prefrontal brain sections. The pharmacological activity of the PDE1 inhibitor, ITI‐214, was assessed by measuring the increase in cAMP/cGMP in prefrontal brain tissue and its effect on working memory performance. Mechanistic studies on the modulation of prefrontal neuronal transmission by SKF38393 and ITI‐214 were performed using extracellular recordings in brain slices. Key Results SKF38393 improved working memory and attentional performance in rodents. D1 receptor/PDE1B co‐expression was verified in both human and rat prefrontal brain sections. The pharmacological activity of ITI‐214 on its target, PDE1, was demonstrated by its ability to increase prefrontal cAMP/cGMP. In addition, ITI‐214 improved working memory performance. Both SKF38393 and ITI‐214 facilitated neuronal transmission in prefrontal brain slices. Conclusion and Implications We hypothesize that PDE1 inhibition improves working memory performance by increasing prefrontal synaptic transmission and/or postsynaptic D1 receptor signalling, by modulating prefrontal downstream second messenger levels. These data, therefore, support the use of PDE1 inhibitors as a potential approach for the treatment of cognitive dysfunction.
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Affiliation(s)
- Anton Pekcec
- CNS Discovery Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, 88397, Germany
| | - Niklas Schülert
- CNS Discovery Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, 88397, Germany
| | - Birgit Stierstorfer
- Target Discovery Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, 88397, Germany
| | - Serena Deiana
- CNS Discovery Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, 88397, Germany
| | - Cornelia Dorner-Ciossek
- CNS Discovery Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, 88397, Germany
| | - Holger Rosenbrock
- CNS Discovery Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, 88397, Germany
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