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Suto T, Kato D, Koibuchi I, Arai Y, Ohta J, Hiroki T, Obata H, Saito S. Rat model of attention-deficit hyperactivity disorder exhibits delayed recovery from acute incisional pain due to impaired descending noradrenergic inhibition. Sci Rep 2023; 13:5526. [PMID: 37016045 PMCID: PMC10073110 DOI: 10.1038/s41598-023-32512-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/28/2023] [Indexed: 04/06/2023] Open
Abstract
Chronic pain and attention-deficit hyperactivity disorder (ADHD) frequently coexist. However, the common pathology is still unclear. Attenuated noradrenergic endogenous analgesia can produce acute pain chronification, and dysfunction of noradrenergic systems in the nervous system is relevant to ADHD symptoms. Noxious stimuli-induced analgesia (NSIA) is measured to estimate noradrenergic endogenous analgesia in spontaneously hypertensive rats (SHR) as an ADHD model and control. Recovery of pain-related behaviors after paw incision was assessed. Contributions of noradrenergic systems were examined by in vivo microdialysis and immunohistochemistry. The SHR showed attenuated NSIA and needed a more extended period for recovery from acute pain. These results suggest ADHD patients exhibit acute pain chronification due to pre-existing attenuated noradrenergic endogenous analgesia. Immunohistochemistry suggests abnormal noradrenaline turnover and downregulation of the target receptor (alpha2a adrenoceptor). Standard ADHD treatment with atomoxetine restored NSIA and shortened the duration of hypersensitivity after the surgery in the SHR. NSIA protocol activated the locus coeruleus, the origin of spinal noradrenaline, of both strains, but only the control exhibited an increase in spinal noradrenaline. This result suggests dysfunction in the noradrenaline-releasing process and can be recognized as a novel mechanism of attenuation of noradrenergic endogenous analgesia.
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Affiliation(s)
- Takashi Suto
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan.
| | - Daiki Kato
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Ikuya Koibuchi
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Yuki Arai
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Jo Ohta
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Tadanao Hiroki
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
| | - Hideaki Obata
- Department of Anesthesiology, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama, 350-8550, Japan
| | - Shigeru Saito
- Department of Anesthesiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8511, Japan
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2
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Almeida AS, Nunes F, Marques DM, Machado ACL, Oliveira CB, Porciuncula LO. Sex differences in maternal odor preferences and brain levels of GAP-43 and sonic hedgehog proteins in infant SHR and Wistar Kyoto rats. Behav Brain Res 2023; 436:114102. [DOI: 10.1016/j.bbr.2022.114102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 09/01/2022] [Accepted: 09/02/2022] [Indexed: 11/29/2022]
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3
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Ferdousi MI, Calcagno P, Sanchez C, Smith KL, Kelly JP, Roche M, Finn DP. Characterization of pain-, anxiety-, and cognition-related behaviors in the complete Freund's adjuvant model of chronic inflammatory pain in Wistar-Kyoto rats. FRONTIERS IN PAIN RESEARCH 2023; 4:1131069. [PMID: 37113211 PMCID: PMC10126329 DOI: 10.3389/fpain.2023.1131069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 03/20/2023] [Indexed: 04/29/2023] Open
Abstract
Introduction Chronic pain is often associated with comorbid anxiety and cognitive dysfunction, negatively affecting therapeutic outcomes. The influence of genetic background on such interactions is poorly understood. The stress-hyperresponsive Wistar-Kyoto (WKY) rat strain, which models aspects of anxiety and depression, displays enhanced sensitivity to noxious stimuli and impaired cognitive function, compared with Sprague-Dawley (SD) counterparts. However, pain- and anxiety-related behaviors and cognitive impairment following induction of a persistent inflammatory state have not been investigated simultaneously in the WKY rats. Here we compared the effects of complete Freund's adjuvant (CFA)-induced persistent inflammation on pain-, negative affect- and cognition-related behaviors in WKY vs. SD rats. Methods Male WKY and SD rats received intra-plantar injection of CFA or needle insertion (control) and, over the subsequent 4 weeks, underwent behavioral tests to assess mechanical and heat hypersensitivity, the aversive component of pain, and anxiety- and cognition-related behaviors. Results The CFA-injected WKY rats exhibited greater mechanical but similar heat hypersensitivity compared to SD counterparts. Neither strain displayed CFA-induced pain avoidance or anxiety-related behavior. No CFA-induced impairment was observed in social interaction or spatial memory in WKY or SD rats in the three-chamber sociability and T-maze tests, respectively, although strain differences were apparent. Reduced novel object exploration time was observed in CFA-injected SD, but not WKY, rats. However, CFA injection did not affect object recognition memory in either strain. Conclusions These data indicate exacerbated baseline and CFA-induced mechanical hypersensitivity, and impairments in novel object exploration, and social and spatial memory in WKY vs. SD rats.
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Affiliation(s)
- Mehnaz I. Ferdousi
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
| | - Patricia Calcagno
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
- Physiology, School of Medicine, University of Galway, Galway, Ireland
| | | | | | - John P. Kelly
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
| | - Michelle Roche
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
- Physiology, School of Medicine, University of Galway, Galway, Ireland
| | - David P. Finn
- Pharmacology and Therapeutics, School of Medicine, University of Galway, Galway, Ireland
- Centre for Pain Research, University of Galway, Galway, Ireland
- Galway Neuroscience Centre, University of Galway, Galway, Ireland
- Correspondence: David P. Finn
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Grünblatt E, Homolak J, Babic Perhoc A, Davor V, Knezovic A, Osmanovic Barilar J, Riederer P, Walitza S, Tackenberg C, Salkovic-Petrisic M. From attention-deficit hyperactivity disorder to sporadic Alzheimer's disease-Wnt/mTOR pathways hypothesis. Front Neurosci 2023; 17:1104985. [PMID: 36875654 PMCID: PMC9978448 DOI: 10.3389/fnins.2023.1104985] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 01/31/2023] [Indexed: 02/18/2023] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder with the majority of patients classified as sporadic AD (sAD), in which etiopathogenesis remains unresolved. Though sAD is argued to be a polygenic disorder, apolipoprotein E (APOE) ε4, was found three decades ago to pose the strongest genetic risk for sAD. Currently, the only clinically approved disease-modifying drugs for AD are aducanumab (Aduhelm) and lecanemab (Leqembi). All other AD treatment options are purely symptomatic with modest benefits. Similarly, attention-deficit hyperactivity disorder (ADHD), is one of the most common neurodevelopmental mental disorders in children and adolescents, acknowledged to persist in adulthood in over 60% of the patients. Moreover, for ADHD whose etiopathogenesis is not completely understood, a large proportion of patients respond well to treatment (first-line psychostimulants, e.g., methylphenidate/MPH), however, no disease-modifying therapy exists. Interestingly, cognitive impairments, executive, and memory deficits seem to be common in ADHD, but also in early stages of mild cognitive impairment (MCI), and dementia, including sAD. Therefore, one of many hypotheses is that ADHD and sAD might have similar origins or that they intercalate with one another, as shown recently that ADHD may be considered a risk factor for sAD. Intriguingly, several overlaps have been shown between the two disorders, e.g., inflammatory activation, oxidative stress, glucose and insulin pathways, wingless-INT/mammalian target of rapamycin (Wnt/mTOR) signaling, and altered lipid metabolism. Indeed, Wnt/mTOR activities were found to be modified by MPH in several ADHD studies. Wnt/mTOR was also found to play a role in sAD and in animal models of the disorder. Moreover, MPH treatment in the MCI phase was shown to be successful for apathy including some improvement in cognition, according to a recent meta-analysis. In several AD animal models, ADHD-like behavioral phenotypes have been observed indicating a possible interconnection between ADHD and AD. In this concept paper, we will discuss the various evidence in human and animal models supporting the hypothesis in which ADHD might increase the risk for sAD, with common involvement of the Wnt/mTOR-pathway leading to lifespan alteration at the neuronal levels.
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Affiliation(s)
- Edna Grünblatt
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich (PUK), University of Zurich, Zurich, Switzerland.,Neuroscience Center Zurich, University of Zurich and the Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Jan Homolak
- Department of Pharmacology and Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Ana Babic Perhoc
- Department of Pharmacology and Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Virag Davor
- Department of Pharmacology and Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Ana Knezovic
- Department of Pharmacology and Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Jelena Osmanovic Barilar
- Department of Pharmacology and Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Peter Riederer
- Department of Psychiatry, Psychosomatics and Psychotherapy, Center of Mental Health, University Hospital Würzburg, Würzburg, Germany.,Department and Research Unit of Psychiatry, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Susanne Walitza
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich (PUK), University of Zurich, Zurich, Switzerland.,Neuroscience Center Zurich, University of Zurich and the Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.,Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Christian Tackenberg
- Neuroscience Center Zurich, University of Zurich and the Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland.,Institute for Regenerative Medicine (IREM), University of Zurich, Schlieren, Switzerland
| | - Melita Salkovic-Petrisic
- Department of Pharmacology and Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia
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Raony Í, Domith I, Lourenco MV, Paes-de-Carvalho R, Pandolfo P. Trace amine-associated receptor 1 modulates motor hyperactivity, cognition, and anxiety-like behavior in an animal model of ADHD. Prog Neuropsychopharmacol Biol Psychiatry 2022; 117:110555. [PMID: 35346791 DOI: 10.1016/j.pnpbp.2022.110555] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 03/03/2022] [Accepted: 03/22/2022] [Indexed: 02/03/2023]
Abstract
Trace amine-associated receptor 1 (TAAR1) is a G protein-coupled receptor that has recently been implicated in several psychiatric conditions related to monoaminergic dysfunction, such as schizophrenia, substance use disorders, and mood disorders. Although attention-deficit/hyperactivity disorder (ADHD) is also related to changes in monoaminergic neurotransmission, studies that assess whether TAAR1 participates in the neurobiology of ADHD are lacking. We hypothesized that TAAR1 plays an important role in ADHD and might represent a potential therapeutic target. Here, we investigate if TAAR1 modulates behavioral phenotypes in Spontaneously Hypertensive Rats (SHR), the most validated animal model of ADHD, and Wistar Kyoto rats (WKY, used as a control strain). Our results showed that TAAR1 is downregulated in ADHD-related brain regions in SHR compared with WKY. While intracerebroventricular (i.c.v.) administration of the selective TAAR1 antagonist EPPTB impaired cognitive performance in SHR, i.c.v. administration of highly selective TAAR1 full agonist RO5256390 decreased motor hyperactivity, novelty-induced locomotion, and induced an anxiolytic-like behavior. Overall, our findings show that changes in TAAR1 levels/activity underlie behavior in SHR, suggesting that TAAR1 plays a role in the neurobiology of ADHD. Although additional confirmatory studies are required, TAAR1 might be a potential pharmacological target for individuals with this disorder.
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Affiliation(s)
- Ícaro Raony
- Laboratory of Neurobiology of Animal Behavior, Department of Neurobiology and Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói 24020-141, Brazil; Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Ivan Domith
- Laboratory of Cellular Neurobiology, Department of Neurobiology and Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói 24020-141, Brazil
| | - Mychael V Lourenco
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Roberto Paes-de-Carvalho
- Laboratory of Cellular Neurobiology, Department of Neurobiology and Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói 24020-141, Brazil
| | - Pablo Pandolfo
- Laboratory of Neurobiology of Animal Behavior, Department of Neurobiology and Program of Neurosciences, Institute of Biology, Fluminense Federal University, Niterói 24020-141, Brazil.
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de Sousa Macedo LLB, Antunes FTT, de Andrade Alvarenga W, Batista MCC, de Moura MSB, Farias MNL, Caminski ES, Dallegrave E, Grivicich I, de Souza AH. Curcumin for attention-deficit-hyperactivity disorder: a systematic review and preliminary behavioral investigation. Naunyn Schmiedebergs Arch Pharmacol 2022; 395:803-813. [PMID: 35394134 DOI: 10.1007/s00210-022-02236-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/24/2022] [Indexed: 12/08/2022]
Abstract
Curcumin has protective actions in neuropsychiatric disorders, acting as a neuroprotective agent. As a first approach, the study aimed at a systematic review of the potential effects of curcumin on cognitive performance for attention-deficit-hyperactivity disorder (ADHD). This research was carried out in the databases of PubMed, Embase, SciELO, the Cochrane Central Register of Controlled Trials (CENTRAL), the Web of Science, and the Grey literature. Upon discovering the scarcity of relevant studies, and knowing that curcumin might have an ADHD hyperactive and anxious behavior, the study proposed to evaluate the effects of curcumin in an ADHD phenotype of spontaneously hypertensive Wistar rats (SHR). No studies were found that related to curcumin and ADHD. Fifteen SHRs were then divided into separate groups that received water (1 mg/kg/day), curcumin (50 mg/kg/day), or methylphenidate (1 mg/kg/day) for 42 days. Behavioral tests to assess activity (Open Field Test), anxiety and impulsivity (Elevated Plus-Maze, and Social Interaction), and memory (Y-Maze, and the Object Recognition Test) were all performed. The animals that were treated with curcumin showed less anxious and hyperactive behavior, as seen in the Open Field Test and the Social Interaction Test. Anxious behavior was measured by the EPM and was not modulated by any treatment. The results of the Y-Maze Test demonstrated that curcumin improved spatial memory. In the Object Recognition Test, neither the short nor the long-term memory was improved. The treatments that were used in this study beneficially modulated the anxious and hyperactive behavior of the SHR.
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Affiliation(s)
- Lélia Lilianna Borges de Sousa Macedo
- Programa de Pós-Graduação Em Biologia Celular E Molecular Aplicada À Saúde, Universidade Luterana Do Brasil (ULBRA), Avenida Farroupilha, 8001, São José, Canoas, Rio Grande Do Sul, CEP 92425-020, Brasil
| | - Flavia Tasmin Techera Antunes
- Programa de Pós-Graduação Em Biologia Celular E Molecular Aplicada À Saúde, Universidade Luterana Do Brasil (ULBRA), Avenida Farroupilha, 8001, São José, Canoas, Rio Grande Do Sul, CEP 92425-020, Brasil.
| | | | | | | | | | - Emanuelle Sistherenn Caminski
- Laboratório de Pesquisa Em Toxicologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
| | - Eliane Dallegrave
- Laboratório de Pesquisa Em Toxicologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
| | - Ivana Grivicich
- Programa de Pós-Graduação Em Biologia Celular E Molecular Aplicada À Saúde, Universidade Luterana Do Brasil (ULBRA), Avenida Farroupilha, 8001, São José, Canoas, Rio Grande Do Sul, CEP 92425-020, Brasil
| | - Alessandra Hübner de Souza
- Programa de Pós-Graduação Em Biologia Celular E Molecular Aplicada À Saúde, Universidade Luterana Do Brasil (ULBRA), Avenida Farroupilha, 8001, São José, Canoas, Rio Grande Do Sul, CEP 92425-020, Brasil
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Shindo T, Shikanai H, Watarai A, Hiraide S, Iizuka K, Izumi T. D-serine metabolism in the medial prefrontal cortex, but not the hippocampus, is involved in AD/HD-like behaviors in SHRSP/Ezo. Eur J Pharmacol 2022; 923:174930. [PMID: 35364072 DOI: 10.1016/j.ejphar.2022.174930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 03/03/2022] [Accepted: 03/25/2022] [Indexed: 12/26/2022]
Abstract
Attention-deficit/hyperactivity disorder (AD/HD) is a mild neurodevelopmental disorder with inattention, hyperactivity, and impulsivity as its core symptoms. We previously revealed that an AD/HD animal model, juvenile stroke-prone spontaneously hypertensive rats (SHRSP/Ezo) exhibited functional abnormalities in N-methyl-D-aspartate (NMDA) receptors in the prefrontal cortex. D-serine is an endogenous co-ligand that acts on the glycine-binding site of NMDA receptors, which is essential for the physiological activation of NMDA receptors. We herein performed neurochemical and pharmacological behavioral experiments to elucidate dysfunctions in D-serine metabolism (namely, biosynthesis and catabolism) associated to AD/HD. The serine enantiomers ratio (D-serine/D-serine + L-serine, DL ratio) in the medial prefrontal cortex (mPFC) and hippocampus (HIP) was lower in SHRSP/Ezo than in its genetic control. The level of D-amino acid oxidase (DAAO, D-serine degrading enzyme) was higher in the mPFC, and the level of serine racemase (SR, D-serine biosynthetic enzyme), was lower in the HIP in SHRSP/Ezo. Thus, changes in these enzymes may contribute to the lower DL ratio of SHRSP/Ezo. Moreover, a microinjection of a DAAO inhibitor into the mPFC in SHRSP/Ezo increased DL ratio and attenuated AD/HD-like behaviors, such as inattention and hyperactivity, in the Y-maze test. Injection into the HIP also increased the DL ratio, but had no effect on behaviors. These results suggest that AD/HD-like behaviors in SHRSP/Ezo are associated with an abnormal D-serine metabolism underlying NMDA receptor dysfunction in the mPFC. These results will contribute to elucidating the pathogenesis of AD/HD and the development of new treatment strategies for AD/HD.
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Affiliation(s)
- Tsugumi Shindo
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido, Japan
| | - Hiroki Shikanai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido, Japan; Advanced Research Promotion Center, Health Science University of Hokkaido, Japan.
| | - Akane Watarai
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido, Japan
| | - Sachiko Hiraide
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido, Japan
| | - Kenji Iizuka
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido, Japan
| | - Takeshi Izumi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Health Science University of Hokkaido, Japan; Advanced Research Promotion Center, Health Science University of Hokkaido, Japan
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8
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Özkan E, Çetin-Taş Y, Şekerdağ E, Kızılırmak AB, Taş A, Yıldız E, Yapıcı-Eser H, Karahüseyinoğlu S, Zeybel M, Gürsoy-Özdemir Y. Blood-brain barrier leakage and perivascular collagen accumulation precede microvessel rarefaction and memory impairment in a chronic hypertension animal model. Metab Brain Dis 2021; 36:2553-2566. [PMID: 34118020 DOI: 10.1007/s11011-021-00767-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/06/2021] [Indexed: 01/07/2023]
Abstract
Hypertension (HT) is one of the main causes of vascular dementia, lead to cognitive decline. Here, we investigated the relationship between cerebral microvessels, pericytes, extracellular matrix (ECM) accumulation, blood-brain barrier (BBB) breakdown, and memory impairment at mid-life in a chronic hypertension animal model. Spontaneously hypertensive rats (SHRs) (n = 20) are chosen for the model and age matched Wistar rats (n = 16) as controls. Changes in brain microvasculature and in vitro experiments are shown with immunofluorescence studies and cognition with open field, novel object recognition, and Y maze tests. There was a significant reduction in pericyte coverage in SHRs (p = 0.021), while the quantitative parameters of the cerebral microvascular network were not different between groups. On the other hand, parenchymal albumin leakage, as a Blood-brain barrier (BBB) breakdown marker, was prominent in SHRs (p = 0.023). Extracellular matrix (ECM) components, collagen type 1, 3 and 4 were significantly increased (accumulated) around microvasculature in SHRs (p = 0.011, p = 0.013, p = 0.037, respectively). Furthermore, in vitro experiments demonstrated that human brain vascular pericytes but not astrocytes and endothelial cells secreted type I collagen upon TGFβ1 exposure pointing out a possible role of pericytes in increased collagen accumulation around cerebral microvasculature due to HT. Furthermore, valsartan treatment decreased the amount of collagen type 1 secreted by pericytes after TGFβ1 exposure. At the time of evaluation, SHRs did not demonstrate cognitive decline and memory impairments. Our results showed that chronic HT causes ECM accumulation and BBB leakage before leading to memory impairments and therefore, pericytes could be a novel target for preventing vascular dementia.
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Affiliation(s)
- Esra Özkan
- Koç University Research Center for Translational Medicine, Istanbul, Turkey.
- Koç University Hospital, Zeytinburnu, 34010, Istanbul, Turkey.
| | - Yağmur Çetin-Taş
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Emine Şekerdağ
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Ali B Kızılırmak
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Ali Taş
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Erdost Yıldız
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
| | - Hale Yapıcı-Eser
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
- Department of Psychiatry, School of Medicine, Koç University, Istanbul, Turkey
| | - Serçin Karahüseyinoğlu
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
- Department of Histology and Embryology, School of Medicine, Koç University, Istanbul, Turkey
| | - Müjdat Zeybel
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
- NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust & University of Nottingham, Nottingham, UK
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK
| | - Yasemin Gürsoy-Özdemir
- Koç University Research Center for Translational Medicine, Istanbul, Turkey
- Department of Neurology, School of Medicine, Koç University, Istanbul, Turkey
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9
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Atucha NM, Romecín P, Vargas F, García-Estañ J. Effects of flavonoids in experimental models of arterial hypertension. Curr Top Med Chem 2021; 22:735-745. [PMID: 34749613 DOI: 10.2174/1568026621666211105100800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/21/2021] [Accepted: 08/12/2021] [Indexed: 11/22/2022]
Abstract
Flavonoids are a class of substances of a vegetal origin with many interesting actions from the point of view of human disease. Interest in flavonoids in the diet has increased in recent years due to the publication of basic, clinical and epidemiological studies that have shown a whole array of salutory effects related to intake of flavonols and flavones as well as a lower morbility and mortality of cardiovascular diseases. Since arterial hypertension is the most common modifiable risk factor for cardiovascular diseases, this review will focus mainly on the effects of flavonoids on the cardiovascular system with relation to the elevation of blood pressure. Its antihypertensive effects as well as the many investigations performed in experimental models of arterial hypertension are reviewed in this mini-review.
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Affiliation(s)
- Noemi M Atucha
- Departmento de Fisiología, Facultad de Medicina, Instituto Murciano de Investigación Biomédica, Universidad de Murcia, Murcia, and Granada. Spain
| | - Paola Romecín
- Departmento de Fisiología, Facultad de Medicina, Instituto Murciano de Investigación Biomédica, Universidad de Murcia, Murcia, and Granada. Spain
| | - Felix Vargas
- Departmento de Fisiología, Facultad de Medicina, Instituto Murciano de Investigación Biomédica, Universidad de Murcia, Murcia, and Granada. Spain
| | - Joaquin García-Estañ
- Departmento de Fisiología, Facultad de Medicina, Instituto Murciano de Investigación Biomédica, Universidad de Murcia, Murcia, and Granada. Spain
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10
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Castaño Barrios L, Da Silva Pinheiro AP, Gibaldi D, Silva AA, Machado Rodrigues e Silva P, Roffê E, da Costa Santiago H, Tostes Gazzinelli R, Mineo JR, Silva NM, Lannes-Vieira J. Behavioral alterations in long-term Toxoplasma gondii infection of C57BL/6 mice are associated with neuroinflammation and disruption of the blood brain barrier. PLoS One 2021; 16:e0258199. [PMID: 34610039 PMCID: PMC8491889 DOI: 10.1371/journal.pone.0258199] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 09/21/2021] [Indexed: 12/18/2022] Open
Abstract
The Apicomplexa protozoan Toxoplasma gondii is a mandatory intracellular parasite and the causative agent of toxoplasmosis. This illness is of medical importance due to its high prevalence worldwide and may cause neurological alterations in immunocompromised persons. In chronically infected immunocompetent individuals, this parasite forms tissue cysts mainly in the brain. In addition, T. gondii infection has been related to mental illnesses such as schizophrenia, bipolar disorder, depression, obsessive-compulsive disorder, as well as mood, personality, and other behavioral changes. In the present study, we evaluated the kinetics of behavioral alterations in a model of chronic infection, assessing anxiety, depression and exploratory behavior, and their relationship with neuroinflammation and parasite cysts in brain tissue areas, blood-brain-barrier (BBB) integrity, and cytokine status in the brain and serum. Adult female C57BL/6 mice were infected by gavage with 5 cysts of the ME-49 type II T. gondii strain, and analyzed as independent groups at 30, 60 and 90 days postinfection (dpi). Anxiety, depressive-like behavior, and hyperactivity were detected in the early (30 dpi) and long-term (60 and 90 dpi) chronic T. gondii infection, in a direct association with the presence of parasite cysts and neuroinflammation, independently of the brain tissue areas, and linked to BBB disruption. These behavioral alterations paralleled the upregulation of expression of tumor necrosis factor (TNF) and CC-chemokines (CCL2/MCP-1, CCL3/MIP-1α, CCL4/MIP-1β and CCL5/RANTES) in the brain tissue. In addition, increased levels of interferon-gamma (IFNγ), TNF and CCL2/MCP-1 were detected in the peripheral blood, at 30 and 60 dpi. Our data suggest that the persistence of parasite cysts induces sustained neuroinflammation, and BBB disruption, thus allowing leakage of cytokines of circulating plasma into the brain tissue. Therefore, all these factors may contribute to behavioral changes (anxiety, depressive-like behavior, and hyperactivity) in chronic T. gondii infection.
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Affiliation(s)
- Leda Castaño Barrios
- Laboratory of Biology of the Interactions, Oswaldo Cruz Institute/Fiocruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Paula Da Silva Pinheiro
- Laboratory of Biology of the Interactions, Oswaldo Cruz Institute/Fiocruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Daniel Gibaldi
- Laboratory of Biology of the Interactions, Oswaldo Cruz Institute/Fiocruz, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Andrea Alice Silva
- Multiuser Laboratory for Research Support in Nephrology and Medical Sciences, Federal University Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Ester Roffê
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Helton da Costa Santiago
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ricardo Tostes Gazzinelli
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - José Roberto Mineo
- Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Neide Maria Silva
- Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Joseli Lannes-Vieira
- Laboratory of Biology of the Interactions, Oswaldo Cruz Institute/Fiocruz, Rio de Janeiro, Rio de Janeiro, Brazil
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11
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Kantak KM, Stots C, Mathieson E, Bryant CD. Spontaneously Hypertensive Rat substrains show differences in model traits for addiction risk and cocaine self-administration: Implications for a novel rat reduced complexity cross. Behav Brain Res 2021; 411:113406. [PMID: 34097899 PMCID: PMC8265396 DOI: 10.1016/j.bbr.2021.113406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/28/2021] [Accepted: 06/03/2021] [Indexed: 12/17/2022]
Abstract
Forward genetic mapping of F2 crosses between closely related substrains of inbred rodents - referred to as a reduced complexity cross (RCC) - is a relatively new strategy for accelerating the pace of gene discovery for complex traits, such as drug addiction. RCCs to date were generated in mice, but rats are thought to be optimal for addiction genetic studies. Based on past literature, one inbred Spontaneously Hypertensive Rat substrain, SHR/NCrl, is predicted to exhibit a distinct behavioral profile as it relates to cocaine self-administration traits relative to another substrain, SHR/NHsd. Direct substrain comparisons are a necessary first step before implementing an RCC. We evaluated model traits for cocaine addiction risk and cocaine self-administration behaviors using a longitudinal within-subjects design. Impulsive-like and compulsive-like traits were greater in SHR/NCrl than SHR/NHsd, as were reactivity to sucrose reward, sensitivity to acute psychostimulant effects of cocaine, and cocaine use studied under fixed-ratio and tandem schedules of cocaine self-administration. Compulsive-like behavior correlated with the acute psychostimulant effects of cocaine, which in turn correlated with cocaine taking under the tandem schedule. Compulsive-like behavior also was the best predictor of cocaine seeking responses. Heritability estimates indicated that 22 %-40 % of the variances for the above phenotypes can be explained by additive genetic factors, providing sufficient genetic variance to conduct genetic mapping in F2 crosses of SHR/NCrl and SHR/NHsd. These results provide compelling support for using an RCC approach in SHR substrains to uncover candidate genes and variants that are of relevance to cocaine use disorders.
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Affiliation(s)
- Kathleen M Kantak
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA; Center for Systems Neuroscience, Boston University, Boston, MA, USA.
| | - Carissa Stots
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA
| | - Elon Mathieson
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA
| | - Camron D Bryant
- Departments of Pharmacology and Experimental Therapeutics and Psychiatry, Boston University School of Medicine, Boston, MA, USA; Center for Systems Neuroscience, Boston University, Boston, MA, USA
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12
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Rezende LMTD, Soares LL, Drummond FR, Suarez PZ, Leite L, Rodrigues JA, Leal T, Favarato L, Reis ECC, Favarato E, Carneiro M, Natali AJ, Coimbra C, Gomes TP. Is the Wistar Rat a more Suitable Normotensive Control for SHR to Test Blood Pressure and Cardiac Structure and Function? INTERNATIONAL JOURNAL OF CARDIOVASCULAR SCIENCES 2021. [DOI: 10.36660/ijcs.20200367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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13
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Stoyell-Conti FF, Chabbra A, Puthentharayil J, Rigatto K, Speth RC. Chronic administration of pharmacological doses of angiotensin 1-7 and iodoangiotensin 1-7 has minimal effects on blood pressure, heart rate, and cognitive function of spontaneously hypertensive rats. Physiol Rep 2021; 9:e14812. [PMID: 33904655 PMCID: PMC8077095 DOI: 10.14814/phy2.14812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 12/26/2022] Open
Abstract
Cardiovascular diseases are the principal cause of death worldwide, with hypertension being the most common cardiovascular disease risk factor. High blood pressure (BP) is also associated with an increased risk of poor cognitive performance and dementia including Alzheimer's disease. Angiotensin 1–7 (Ang 1‐7), a product of the renin‐angiotensin system (RAS), exhibits central and peripheral actions to reduce BP. Recent data from our lab reveals that the addition of a non‐radioactive iodine molecule to the tyrosine in position 4 of Ang 1‐7 (iodoAng 1‐7) makes it ~1000‐fold more potent than Ang 1‐7 in competing for the 125I‐Ang 1‐7 binding site (Stoyell‐Conti et al., 2020). Moreover, the addition of the non‐radioactive iodine molecule increases (~4‐fold) iodoAng 1‐7’s ability to bind to the AT1 receptor (AT1R), the primary receptor for Ang II. Preliminary data indicates that iodoAng 1‐7 can also compete for the 125I‐Ang IV binding site with a low micromolar IC50. Thus, our aims were to compare the effects of chronic treatment of the Spontaneously Hypertensive Rat (SHR) with iodoAng 1‐7 (non‐radioactive iodine isotope) and Ang 1‐7 on arterial pressure, heart rate, and cognitive function. For this study, male SHRs were divided into three groups and treated with Saline, Ang 1‐7, or iodoAng 1‐7 administrated subcutaneously using a 28‐day osmotic mini pump. Systolic BP was measured non‐invasively by the tail‐cuff technique. Cognitive function was assessed by Y‐Maze test and novel object recognition (NOR) test. We have demonstrated in SHRs that subcutaneous administration of high doses of iodoAng 1‐7 prevented the increase in heart rate with age, while Ang 1‐7 showed a trend toward preventing the increase in heart rate, possibly by improving baroreflex control of the heart. Conversely, neither Ang 1‐7 nor iodoAng 1‐7 administered subcutaneously affected BP nor cognitive function.
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Affiliation(s)
- Filipe F Stoyell-Conti
- College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA.,Surgery Department, University of Miami, Miami, FL, USA
| | - Alesa Chabbra
- Halmos College of Natural Science & Oceanography, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Joseph Puthentharayil
- Halmos College of Natural Science & Oceanography, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Katya Rigatto
- Institute for Neuro-Immune Medicine, Nova Southeastern University, Fort Lauderdale, FL, USA.,Laboratório de Fisiologia Translacional, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Robert C Speth
- College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA.,Department of Pharmacology and Physiology, College of Medicine, Georgetown University, Washington, DC, USA
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14
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Mineralocorticoid Receptor Antagonists Eplerenone and Spironolactone Modify Adrenal Cortex Morphology and Physiology. Biomedicines 2021; 9:biomedicines9040441. [PMID: 33924172 PMCID: PMC8074383 DOI: 10.3390/biomedicines9040441] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/14/2021] [Accepted: 04/17/2021] [Indexed: 11/16/2022] Open
Abstract
Mineralocorticoid receptor antagonists (MRAs) are a class of anti-hypertensive drugs that act by blocking aldosterone action. The aim of this study was to evaluate whether the MRAs spironolactone and eplerenone influence adrenal cortical physiology and morphology. Spontaneous hypertensive rats (SHR, n = 18) and normotensive rats (WKY, n = 18) were randomly exposed to a daily dose of spironolactone (n = 6), eplerenone (n = 6), or no drug (n = 6) over 28 days. After that, aldosterone, corticosterone, and 11-deoxycorticosterone plasma concentrations were quantified. Adrenal glands were subjected to morphological analysis to assess lipid droplets content, capsular width, cell proliferation, and steroidogenic proteins expression. The adrenal cortex in untreated SHR showed higher lipid droplet content as than in WKY. In SHR, MRA treatment was associated with higher circulating aldosterone levels and Ki-67 expression in aldosterone-secreting cells. In WKY, the only difference observed after MRA spironolactone treatment was a narrower capsule. There was no difference in abundance of steroidogenic enzyme between groups. In conclusion, MRAs modify adrenal gland function and morphology in SHR. The effects observed within the adrenal glomerulosa with aldosterone-secreting cell proliferation and higher circulating aldosterone levels suggests that MRA treatment provokes activation of the renin angiotensin system. The prognostic value of hyperaldosteronism secondary to MRAs blockade requires further investigation.
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15
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Improved 3D tracking and automated classification of rodents' behavioral activity using depth-sensing cameras. Behav Res Methods 2021; 52:2156-2167. [PMID: 32232737 DOI: 10.3758/s13428-020-01381-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Analysis of rodents' behavior/activity is of fundamental importance in many research fields. However, many behavioral experiments still rely on manual scoring, with obvious problems in reproducibility. Despite important advances in video-analysis systems and computational ethology, automated behavior quantification is still a challenge. The need for large training datasets, background stability requirements, and reduction to two-dimensional analysis (impairing full posture characterization), limit their use. Here we present a novel integrated solution for behavioral analysis of individual rats, combining video segmentation, tracking of body parts, and automated classification of behaviors, using machine learning and computer vision methods. Low-cost depth cameras (RGB-D) are used to enable three-dimensional tracking and classification in dark conditions and absence of color contrast. Our solution automatically tracks five anatomical landmarks in dynamic environments and recognizes seven distinct behaviors, within the accuracy range of human annotations. The developed free software was validated in experiments where behavioral differences between Wistar Kyoto and Wistar rats were automatically quantified. The results reveal the capability for effective automated phenotyping. An extended annotated RGB-D dataset is also made publicly available. The proposed solution is an easy-to-use tool, with low-cost setup and powerful 3D segmentation methods (in static/dynamic environments). The ability to work in dark conditions means that natural animal behavior is not affected by recording lights. Furthermore, automated classification is possible with only ~30 minutes of annotated videos. By creating conditions for high-throughput analysis and reproducible quantitative measurements of animal behavior experiments, we believe this contribution can greatly improve behavioral analysis research.
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16
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The pathophysiology of acute gastric ulcer development in normotensive and hypertensive rats: A comparative study. Eur J Pharmacol 2020; 887:173469. [DOI: 10.1016/j.ejphar.2020.173469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/30/2020] [Accepted: 08/06/2020] [Indexed: 01/24/2023]
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17
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Early-life stress affects drug abuse susceptibility in adolescent rat model independently of depression vulnerability. Sci Rep 2020; 10:13326. [PMID: 32769999 PMCID: PMC7414128 DOI: 10.1038/s41598-020-70242-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 07/16/2020] [Indexed: 12/22/2022] Open
Abstract
The development of substance abuse problems occurs due to a diverse combination of risk factors. Among these risks, studies have reported depression and early-life stress as of importance. These two factors often occur simultaneously, however, there is a lack of understanding of how their combined effect may impact vulnerability to drug abuse in adolescence. The present study used rats with different vulnerability to depression (Wistar and Wistar-Kyoto) to investigate the impact of maternal separation (MS) on emotional state and drug addiction vulnerability during the adolescence period. Mothers and their litters were subjected to MS (180 min/day) from postnatal day 2 to 14. The offspring emotional state was assessed by observing their exploratory behavior. Drug abuse vulnerability was assessed through conditioning to cocaine. MS impacted the emotional state in both strains. Wistar responded with increased exploration, while Wistar-Kyoto increased anxiety-like behaviours. Despite the different coping strategies displayed by the two strains when challenged with the behavioural tests, drug conditioning was equally impacted by MS in both strains. Early-life stress appears to affect drug abuse vulnerability in adolescence independently of a depression background, suggesting emotional state as the main driving risk factor.
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18
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Gondré-Lewis MC, Bassey R, Blum K. Pre-clinical models of reward deficiency syndrome: A behavioral octopus. Neurosci Biobehav Rev 2020; 115:164-188. [PMID: 32360413 DOI: 10.1016/j.neubiorev.2020.04.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 04/08/2020] [Accepted: 04/20/2020] [Indexed: 12/15/2022]
Abstract
Individuals with mood disorders or with addiction, impulsivity and some personality disorders can share in common a dysfunction in how the brain perceives reward, where processing of natural endorphins or the response to exogenous dopamine stimulants is impaired. Reward Deficiency Syndrome (RDS) is a polygenic trait with implications that suggest cross-talk between different neurological systems that include the known reward pathway, neuroendocrine systems, and motivational systems. In this review we evaluate well-characterized animal models for their construct validity and as potential models for RDS. Animal models used to study substance use disorder, major depressive disorder (MDD), early life stress, immune dysregulation, attention deficit hyperactivity disorder (ADHD), post traumatic stress disorder (PTSD), compulsive gambling and compulsive eating disorders are discussed. These disorders recruit underlying reward deficiency mechanisms in multiple brain centers. Because of the widespread and remarkable array of associated/overlapping behavioral manifestations with a common root of hypodopaminergia, the basic endophenotype recognized as RDS is indeed likened to a behavioral octopus. We conclude this review with a look ahead on how these models can be used to investigate potential therapeutics that target the underlying common deficiency.
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Affiliation(s)
- Marjorie C Gondré-Lewis
- Department of Anatomy, Howard University College of Medicine, 520 W Street, NW, Washington D.C., 20059, United States; Developmental Neuropsychopharmacology Laboratory, Howard University College of Medicine, 520 W Street, NW, Washington D.C., 20059, United States.
| | - Rosemary Bassey
- Developmental Neuropsychopharmacology Laboratory, Howard University College of Medicine, 520 W Street, NW, Washington D.C., 20059, United States; Department of Science Education, Donald and Barbara Zucker School of Medicine at Hofstra/ Northwell, 500 Hofstra University, Hempstead, NY 11549, United States
| | - Kenneth Blum
- Western University Health Sciences, Graduate College of Biomedical Sciences, Pomona, California, United States
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19
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Johnson AC, Miller JE, Cipolla MJ. Memory impairment in spontaneously hypertensive rats is associated with hippocampal hypoperfusion and hippocampal vascular dysfunction. J Cereb Blood Flow Metab 2020; 40:845-859. [PMID: 31088235 PMCID: PMC7168795 DOI: 10.1177/0271678x19848510] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We investigated the effect of chronic hypertension on hippocampal arterioles (HippAs) and hippocampal perfusion as underlying mechanisms of memory impairment, and how large artery stiffness relates to HippA remodeling. Using male spontaneously hypertensive rats (SHR) and normotensive Wistar rats (n = 12/group), long-term (LTM) and spatial memory were tested using object recognition and spontaneous alternation tasks. Hippocampal blood flow was measured via hydrogen clearance basally and during hypercapnia. Reactivity of isolated and pressurized HippAs to pressure and pharmacological activators and inhibitors was investigated. To determine large artery stiffness, distensibility and elastin content were measured in thoracic aorta. SHR had impaired LTM and spatial memory associated with decreased basal blood flow (68 ± 12 mL/100 g/min) vs. Wistar (111 ± 28 mL/100 g/min, p < 0.01) that increased during hypercapnia similarly between groups. Compared to Wistar, HippAs from SHR had increased tone at 60 mmHg (58 ± 9% vs. 37 ± 7%, p < 0.01), and decreased reactivity to small- and intermediate-conductance calcium-activated potassium (SK/IK) channel activation. HippAs in both groups were unaffected by NOS inhibition. Decreased elastin content correlated with increased stiffness in aorta of SHR that was associated with increased stiffness and hypertrophic remodeling of HippAs. Hippocampal vascular dysfunction during hypertension could potentiate memory deficits and may provide a therapeutic target to limit vascular cognitive impairment.
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Affiliation(s)
- Abbie C Johnson
- Department of Neurological Sciences, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Justin E Miller
- Department of Neurological Sciences, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Marilyn J Cipolla
- Department of Neurological Sciences, University of Vermont Larner College of Medicine, Burlington, VT, USA.,Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Vermont Larner College of Medicine, Burlington, VT, USA.,Department of Pharmacology, University of Vermont Larner College of Medicine, Burlington, VT, USA
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20
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Leffa DT, Bellaver B, Salvi AA, de Oliveira C, Caumo W, Grevet EH, Fregni F, Quincozes-Santos A, Rohde LA, Torres IL. Transcranial direct current stimulation improves long-term memory deficits in an animal model of attention-deficit/hyperactivity disorder and modulates oxidative and inflammatory parameters. Brain Stimul 2018; 11:743-751. [DOI: 10.1016/j.brs.2018.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 03/26/2018] [Accepted: 04/02/2018] [Indexed: 02/07/2023] Open
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21
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Yokota T, Struzik ZR, Jurica P, Horiuchi M, Hiroyama S, Li J, Takahara Y, Ogawa K, Nishitomi K, Hasegawa M, Cichocki A. Semi-Automated Biomarker Discovery from Pharmacodynamic Effects on EEG in ADHD Rodent Models. Sci Rep 2018; 8:5202. [PMID: 29581452 PMCID: PMC5980101 DOI: 10.1038/s41598-018-23450-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 03/13/2018] [Indexed: 11/16/2022] Open
Abstract
We propose a novel semi-automatic approach to design biomarkers for capturing pharmacodynamic effects induced by pharmacological agents on the spectral power of electroencephalography (EEG) recordings. We apply this methodology to investigate the pharmacodynamic effects of methylphenidate (MPH) and atomoxetine (ATX) on attention deficit/hyperactivity disorder (ADHD), using rodent models. We inject the two agents into the spontaneously hypertensive rat (SHR) model of ADHD, the Wistar-Kyoto rat (WKY), and the Wistar rat (WIS), and record their EEG patterns. To assess individual EEG patterns quantitatively, we use an integrated methodological approach, which consists of calculating the mean, slope and intercept parameters of temporal records of EEG spectral power using a smoothing filter, outlier truncation, and linear regression. We apply Fisher discriminant analysis (FDA) to identify dominant discriminants to be heuristically consolidated into several new composite biomarkers. Results of the analysis of variance (ANOVA) and t-test show benefits in pharmacodynamic parameters, especially the slope parameter. Composite biomarker evaluation confirms their validity for genetic model stratification and the effects of the pharmacological agents used. The methodology proposed is of generic use as an approach to investigating thoroughly the dynamics of the EEG spectral power.
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Affiliation(s)
- Tatsuya Yokota
- RIKEN Brain Science Institute, Hirosawa, Wako, Saitama, Japan
| | | | - Peter Jurica
- RIKEN Brain Science Institute, Hirosawa, Wako, Saitama, Japan
| | | | | | - Junhua Li
- RIKEN Brain Science Institute, Hirosawa, Wako, Saitama, Japan
| | - Yuji Takahara
- SHIONOGI & Co., Ltd., Futaba, Toyonaka, Osaka, Japan
| | - Koichi Ogawa
- SHIONOGI & Co., Ltd., Futaba, Toyonaka, Osaka, Japan.
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22
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Nunes F, Pochmann D, Almeida AS, Marques DM, Porciúncula LDO. Differential Behavioral and Biochemical Responses to Caffeine in Male and Female Rats from a Validated Model of Attention Deficit and Hyperactivity Disorder. Mol Neurobiol 2018; 55:8486-8498. [PMID: 29557061 DOI: 10.1007/s12035-018-1000-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/07/2018] [Indexed: 01/01/2023]
Abstract
Epidemiological studies suggest sex differences in attention deficit and hyperactivity disorder (ADHD) symptomatology. The potential benefits of caffeine have been reported in the management of ADHD, but its effects were not properly addressed with respect to sex differences. The present study examined the effects of caffeine (0.3 g/L) administered since childhood in the behavior and brain-derived neurotrophic factor (BDNF) and its related proteins in both sexes of a rat model of ADHD (spontaneously hypertensive rats-SHR). Hyperlocomotion, recognition, and spatial memory disturbances were observed in adolescent SHR rats from both sexes. However, females showed lack of habituation and worsened spatial memory. Although caffeine was effective against recognition memory impairment in both sexes, spatial memory was recovered only in female SHR rats. Besides, female SHR rats showed exacerbated hyperlocomotion after caffeine treatment. SHR rats from both sexes presented increases in the BDNF, truncated and phospho-TrkB receptors and also phospho-CREB levels in the hippocampus. Caffeine normalized BDNF in males and truncated TrkB receptor at both sexes. These findings provide insight into the potential of caffeine against fully cognitive impairment displayed by females in the ADHD model. Besides, our data revealed that caffeine intake since childhood attenuated behavioral alterations in the ADHD model associated with changes in BDNF and TrkB receptors in the hippocampus.
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Affiliation(s)
- Fernanda Nunes
- Laboratory of Studies on the Purinergic System, Department of Biochemistry, Health and Basic Sciences Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | - Daniela Pochmann
- Laboratory of Studies on the Purinergic System, Department of Biochemistry, Health and Basic Sciences Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | - Amanda Staldoni Almeida
- Laboratory of Studies on the Purinergic System, Department of Biochemistry, Health and Basic Sciences Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil
| | | | - Lisiane de Oliveira Porciúncula
- Laboratory of Studies on the Purinergic System, Department of Biochemistry, Health and Basic Sciences Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, 90035-003, Brazil.
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23
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Jurica P, Struzik ZR, Li J, Horiuchi M, Hiroyama S, Takahara Y, Nishitomi K, Ogawa K, Cichocki A. Combining behavior and EEG analysis for exploration of dynamic effects of ADHD treatment in animal models. J Neurosci Methods 2018; 298:24-32. [PMID: 29366980 DOI: 10.1016/j.jneumeth.2018.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 01/09/2018] [Accepted: 01/17/2018] [Indexed: 11/17/2022]
Abstract
BACKGROUND We analyze the dynamics of rodent EEG amplitude in an experiment accompanied by video recordings. Brain activity of animals is commonly acquired together with a video of behavior, but recordings are rarely combined in analysis. The data acquired is most commonly analyzed separately. To our knowledge, no study has used behavior to improve the analysis of EEG waveforms, specifically for artifact removal - other than through manual editing. COMPARISON WITH EXISTING METHOD(S) We explore two approaches: a traditional approach that relies on data preprocessing and artifact rejection by an expert; and an alternative approach that combines analysis of EEG with behavior extracted from video recordings. NEW METHOD We use the level of activity extracted from the behavioral video as a measure of confidence in the acquired EEG waveform, and as a weighting factor in averaging and statistical comparisons. RESULTS We find in analysis of the EEG that the two approaches lead to similar conclusions, but the analysis leveraging behavioral data achieves this while avoiding many subjective choices often required for artifact rejection and data preprocessing. CONCLUSIONS The methods we describe allow for the inclusion of all recorded data in the analysis, thereby making statistical tests more friendly to interpretation, and making the data processing transparent and reproducible.
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Affiliation(s)
- Peter Jurica
- RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
| | - Zbigniew R Struzik
- RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan; Graduate School of Education, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Junhua Li
- RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Masahito Horiuchi
- Drug Safety Evaluation, Research Laboratory for Development, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka, Osaka 561-0825, Japan
| | - Shuichi Hiroyama
- Drug Safety Evaluation, Research Laboratory for Development, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka, Osaka 561-0825, Japan
| | - Yuji Takahara
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-city, Osaka 561-0825, Japan
| | - Kohei Nishitomi
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-city, Osaka 561-0825, Japan
| | - Koichi Ogawa
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-city, Osaka 561-0825, Japan.
| | - Andrzej Cichocki
- RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan; Skolkovo Institute of Science and Technology (SKOLTECH), Nobelya Ulitsa 3, Moscow 121205, Russia; Nicolaus Copernicus University, ul. Gagarina 11, 87-100 Torun, Poland
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Chen Y, Zheng X, Xie L, Huang L, Ke Z, Zheng J, Lu H, Hu J. Glucocorticoids/glucocorticoid receptors effect on dopaminergic neurotransmitters in ADHD rats. Brain Res Bull 2017; 131:214-220. [DOI: 10.1016/j.brainresbull.2017.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 01/12/2023]
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Kin K, Yasuhara T, Kameda M, Agari T, Sasaki T, Morimoto J, Okazaki M, Umakoshi M, Kuwahara K, Kin I, Tajiri N, Date I. Hippocampal neurogenesis of Wistar Kyoto rats is congenitally impaired and correlated with stress resistance. Behav Brain Res 2017; 329:148-156. [PMID: 28465137 DOI: 10.1016/j.bbr.2017.04.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 04/17/2017] [Accepted: 04/22/2017] [Indexed: 12/28/2022]
Abstract
The hippocampus is thought to be an important region for depression. However, the relationship between hippocampal neurogenesis and depression is still controversial. Wistar Kyoto (WKY) rats are frequently used as a depression model. WKY rats are known to show physiologically abnormal features, and these features resemble abnormalities seen in depressed patients. However, the neurogenesis of WKY rats is still unknown. In this study, we first evaluated the neurogenesis of WKY rats and compared it to that of Wistar (WIS) rats. No strain effect was observed in the number of cells positive for 5-bromo-2'-deoxyuridine (BrdU) and BrdU/Doublecortin (Dcx) in the subventricular zone (SVZ). However, the number of BrdU- and BrdU/Dcx-positive cells in the dentate gyrus (DG) of the hippocampus was significantly lower in WKY rats than in WIS rats. Next, we evaluated the correlation between neurogenesis and behavior tests. Behavior tests did not affect neurogenesis in either strain. Hippocampal neurogenesis correlated negatively with the results of a forced swim test (FST) on day 2 in each strain. That is, rats with a lower level of native neurogenesis in the DG showed a higher level of learned helplessness induced by the inescapable stress of the FST on day 1. Our findings indicate that hippocampal neurogenesis in WKY rats is congenitally impaired in contrast to that in WIS rats. Native cell proliferation and neurogenesis in the DG are correlated with stress resistance. These findings may be useful for developing new targets for depression treatment.
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Affiliation(s)
- Kyohei Kin
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Takao Yasuhara
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan.
| | - Masahiro Kameda
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Takashi Agari
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Tatsuya Sasaki
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Jun Morimoto
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Mihoko Okazaki
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Michiari Umakoshi
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Ken Kuwahara
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Ittetsu Kin
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Naoki Tajiri
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan; Department of Psychology, Kibi International University Graduate School of Psychology, 8, iga-cho, takahashi-shi, Okayama, 716-8508, Japan
| | - Isao Date
- Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
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Ragaeva DS, Tikhonova MA, Petrova OM, Igonina TN, Rozkova IN, Brusentsev EY, Amstislavskaya TG, Amstislavsky SY. Neonatal reflexes and behavior in hypertensive rats of ISIAH strain. Physiol Behav 2017; 175:22-30. [PMID: 28341233 DOI: 10.1016/j.physbeh.2017.03.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 02/10/2017] [Accepted: 03/19/2017] [Indexed: 02/08/2023]
Abstract
Hypertension is one of the most common diseases in humans, and there is a special concern on the consequences of maternal hypertensive conditions for the health of newborns. An inherited stress-induced arterial hypertension (ISIAH) rat strain has been selected but only a few studies have addressed behavior in these rats. Body weight, neurodevelopmental reflexes, and neuronal density in the hippocampus were compared in ISIAH and normotensive WAG rats during their suckling period. Systolic and diastolic blood pressure (SBP, DBP), adult rat performance in the open field (OF), elevated plus maze (EPM), and novel object recognition (NOR) tests were evaluated at the age of 12-14weeks old. Body weight in pups did not differ significantly during the suckling period, while adult ISIAH rats were heavier than age-matched WAG rats and possessed the increased SBP and DBP. ISIAH pups were developmentally more advanced than WAG as indicated by grasp reflex and negative geotaxis reaction scores. This was associated with higher neuronal density in CA1 and CA3 hippocampal areas in ISIAH pups on postnatal day 6 as compared to WAG rats. Adult ISIAH rats demonstrated an increased locomotor and exploratory activity in the OF and EPM tests as well as low levels of anxiety. The NOR test revealed no significant difference in recognition but confirmed higher exploratory activity in ISIAH rats compared to WAG rats. The results indicate that hypertensive ISIAH rats feature accelerated development during their suckling period, and as adults, they are more active and less anxious than normotensive WAG rats.
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Affiliation(s)
- Diana S Ragaeva
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia
| | - Maria A Tikhonova
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia; Federal State Budgetary Scientific Institution "Scientific Research Institute of Physiology and Basic Medicine", Novosibirsk 630117, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
| | - Olga M Petrova
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
| | - Tatjana N Igonina
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia
| | - Irina N Rozkova
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia
| | - Eugeny Yu Brusentsev
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia
| | - Tamara G Amstislavskaya
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia; Federal State Budgetary Scientific Institution "Scientific Research Institute of Physiology and Basic Medicine", Novosibirsk 630117, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
| | - Sergey Ya Amstislavsky
- Federal State Budgetary Scientific Institution "Federal Research Center Institute of Cytology and Genetics", Novosibirsk 630090, Russia.
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(-)-Epicatechin Prevents Blood Pressure Increase and Reduces Locomotor Hyperactivity in Young Spontaneously Hypertensive Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:6949020. [PMID: 27885334 PMCID: PMC5112311 DOI: 10.1155/2016/6949020] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 09/08/2016] [Accepted: 10/04/2016] [Indexed: 01/09/2023]
Abstract
This study investigated the effects of subchronic (−)-epicatechin (Epi) treatment on locomotor activity and hypertension development in young spontaneously hypertensive rats (SHR). Epi was administered in drinking water (100 mg/kg/day) for 2 weeks. Epi significantly prevented the development of hypertension (138 ± 2 versus 169 ± 5 mmHg, p < 0.001) and reduced total distance traveled in the open-field test (22 ± 2 versus 35 ± 4 m, p < 0.01). In blood, Epi significantly enhanced erythrocyte deformability, increased total antioxidant capacity, and decreased nitrotyrosine concentration. In the aorta, Epi significantly increased nitric oxide (NO) synthase (NOS) activity and elevated the NO-dependent vasorelaxation. In the left heart ventricle, Epi increased NOS activity without altering gene expressions of nNOS, iNOS, and eNOS. Moreover, Epi reduced superoxide production in the left heart ventricle and the aorta. In the brain, Epi increased nNOS gene expression (in the brainstem and cerebellum) and eNOS expression (in the cerebellum) but had no effect on overall NOS activity. In conclusion, Epi prevented the development of hypertension and reduced locomotor hyperactivity in young SHR. These effects resulted from improved cardiovascular NO bioavailability concurrently with increased erythrocyte deformability, without changes in NO production in the brain.
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Íbias J, Miguéns M, Pellón R. Effects of dopamine agents on a schedule-induced polydipsia procedure in the spontaneously hypertensive rat and in Wistar control rats. J Psychopharmacol 2016; 30:856-66. [PMID: 27296274 DOI: 10.1177/0269881116652598] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The spontaneously hypertensive rat (SHR) has been proposed as an animal model for attention deficit hyperactivity disorder (ADHD), and typically develops excessive patterns of response under most behavioural protocols. Schedule-induced polydipsia (SIP) is the excessive water consumption that occurs as a schedule effect when food is intermittently delivered and animals are partially food- but not water-deprived. SIP has been used as a model of excessive behaviour, and considerable evidence has involved the dopaminergic system in its development and maintenance. The aim of this study was to evaluate the effects of the most common psychostimulants used in ADHD treatment on SIP, comparing their effects in SHRs with rats from control populations. SHR, Wistar Kyoto (WKY) and Wistar rats were submitted to a multiple fixed time (FT) food schedule with two components: 30 s and 90 s. The acute effects of different dopaminergic compounds were evaluated after 40 sessions of SIP acquisition. All animals showed higher adjunctive drinking under FT 30 s than FT 90 s, and SHRs displayed higher asymptotic SIP levels in FT 90 s compared to WKY and Wistar rats. SHRs were less sensitive to dopaminergic agents than control rats in terms of affecting rates of adjunctive drinking. These differences point to an altered dopaminergic system in the SHR and provide new insights into the neurobiological basis of ADHD pharmacological treatments.
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Affiliation(s)
- Javier Íbias
- Animal Behaviour Laboratories, Departamento de Psicología Básica I, Facultad de Psicología, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
| | - Miguel Miguéns
- Animal Behaviour Laboratories, Departamento de Psicología Básica I, Facultad de Psicología, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
| | - Ricardo Pellón
- Animal Behaviour Laboratories, Departamento de Psicología Básica I, Facultad de Psicología, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
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Womersley JS, Mpeta B, Dimatelis JJ, Kellaway LA, Stein DJ, Russell VA. Developmental stress elicits preference for methamphetamine in the spontaneously hypertensive rat model of attention-deficit/hyperactivity disorder. BEHAVIORAL AND BRAIN FUNCTIONS : BBF 2016; 12:18. [PMID: 27317355 PMCID: PMC4912802 DOI: 10.1186/s12993-016-0102-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 06/09/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND Developmental stress has been hypothesised to interact with genetic predisposition to increase the risk of developing substance use disorders. Here we have investigated the effects of maternal separation-induced developmental stress using a behavioural proxy of methamphetamine preference in an animal model of attention-deficit/hyperactivity disorder, the spontaneously hypertensive rat, versus Wistar Kyoto and Sprague-Dawley comparator strains. RESULTS Analysis of results obtained using a conditioned place preference paradigm revealed a significant strain × stress interaction with maternal separation inducing preference for the methamphetamine-associated compartment in spontaneously hypertensive rats. Maternal separation increased behavioural sensitization to the locomotor-stimulatory effects of methamphetamine in both spontaneously hypertensive and Sprague-Dawley strains but not in Wistar Kyoto rats. CONCLUSIONS Our findings indicate that developmental stress in a genetic rat model of attention-deficit/hyperactivity disorder may foster a vulnerability to the development of substance use disorders.
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Affiliation(s)
- Jacqueline S. Womersley
- />Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town, 7925 South Africa
| | - Bafokeng Mpeta
- />Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town, 7925 South Africa
| | - Jacqueline J. Dimatelis
- />Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town, 7925 South Africa
| | - Lauriston A. Kellaway
- />Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town, 7925 South Africa
| | - Dan J. Stein
- />Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Groote Schuur Hospital, Observatory, Cape Town, 7925 South Africa
| | - Vivienne A. Russell
- />Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town, 7925 South Africa
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Adolescent methylphenidate treatment differentially alters adult impulsivity and hyperactivity in the Spontaneously Hypertensive Rat model of ADHD. Pharmacol Biochem Behav 2015; 141:66-77. [PMID: 26657171 DOI: 10.1016/j.pbb.2015.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 09/30/2015] [Accepted: 12/01/2015] [Indexed: 12/30/2022]
Abstract
Impulsivity and hyperactivity are two facets of attention deficit/hyperactivity disorder (ADHD). Impulsivity is expressed as reduced response inhibition capacity, an executive control mechanism that prevents premature execution of an intermittently reinforced behavior. During methylphenidate treatment, impulsivity and hyperactivity are decreased in adolescents with ADHD, but there is little information concerning levels of impulsivity and hyperactivity in adulthood after adolescent methylphenidate treatment is discontinued. The current study evaluated impulsivity, hyperactivity as well as cocaine sensitization during adulthood after adolescent methylphenidate treatment was discontinued in the Spontaneously Hypertensive Rat (SHR) model of ADHD. Treatments consisted of oral methylphenidate (1.5mg/kg) or water vehicle provided Monday-Friday from postnatal days 28-55. During adulthood, impulsivity was measured in SHR and control strains (Wistar Kyoto and Wistar rats) using differential reinforcement of low rate (DRL) schedules. Locomotor activity and cocaine sensitization were measured using the open-field assay. Adult SHR exhibited decreased efficiency of reinforcement under the DRL30 schedule and greater levels of locomotor activity and cocaine sensitization compared to control strains. Compared to vehicle, methylphenidate treatment during adolescence reduced hyperactivity in adult SHR, maintained the lower efficiency of reinforcement, and increased burst responding under DRL30. Cocaine sensitization was not altered following adolescent methylphenidate in adult SHR. In conclusion, adolescent treatment with methylphenidate followed by discontinuation in adulthood had a positive benefit by reducing hyperactivity in adult SHR rats; however, increased burst responding under DRL compared to SHR given vehicle, i.e., elevated impulsivity, constituted an adverse consequence associated with increased risk for cocaine abuse liability.
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D-amphetamine improves attention performance in adolescent Wistar, but not in SHR rats, in a two-choice visual discrimination task. Psychopharmacology (Berl) 2015; 232:3269-86. [PMID: 26037943 DOI: 10.1007/s00213-015-3974-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 05/24/2015] [Indexed: 01/30/2023]
Abstract
The validity of spontaneous hypertensive rat (SHR) as a model of attention deficit hyperactivity disorder (ADHD) has been explored by comparing SHR with Wistar rats in a test of attention, the two-choice visual discrimination task (2-CVDT). Animals were 4-5 weeks old during the training phase of the experiment and 6-7 weeks old during the testing phase in which they were tested with D-amphetamine, a stimulant drug used for the treatment of ADHD. As compared to Wistar, SHR showed a slightly better attention performance, a slightly lower impulsivity level, and a lower general activity during the training phase, but these differences disappeared or lessened thereafter, during the testing phase. D-amphetamine (0.5, 1 mg/kg) improved attention performance in Wistar, but not in SHR, and did not modify impulsivity and activity in the two strains. In conclusion, the present study did not demonstrate that SHR represents a valid model of ADHD, since it did not show face validity regarding the behavioral symptoms of ADHD and predictive validity regarding the effect of a compound used for the treatment of ADHD. On the other hand, this study showed that the 2-CVDT may represent a suitable tool for evaluating in adolescent Wistar rats the effect on attention of compounds intended for the treatment of ADHD.
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Rao RM, Sadananda M. Strain- and context-based 50 kHz ultrasonic vocalizations and anxiety behaviour in the Wistar-Kyoto rat. J Biosci 2015; 40:561-70. [DOI: 10.1007/s12038-015-9534-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pillidge K, Porter AJ, Dudley JA, Tsai YC, Heal DJ, Stanford SC. The behavioural response of mice lacking NK₁ receptors to guanfacine resembles its clinical profile in treatment of ADHD. Br J Pharmacol 2015; 171:4785-96. [PMID: 25074741 PMCID: PMC4209942 DOI: 10.1111/bph.12860] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 07/16/2014] [Accepted: 07/23/2014] [Indexed: 01/15/2023] Open
Abstract
Background and Purpose Mice with functional ablation of substance P-preferring neurokinin-1 receptors (NK1R−/− mice) display behavioural abnormalities resembling those in attention deficit hyperactivity disorder (ADHD). Here, we investigated whether the ADHD treatment, guanfacine, alleviated the hyperactivity and impulsivity/inattention displayed by NK1R−/− mice in the light/dark exploration box (LDEB) and 5-choice serial reaction–time task (5-CSRTT), respectively. Following reports of co-morbid anxiety in ADHD, we also investigated effects of guanfacine on anxiety-like behaviour displayed by NK1R−/− and wild-type (WT) mice in the elevated plus maze (EPM). Experimental Approach Mice were treated with guanfacine (0.1, 0.3 or 1.0 mg·kg−1, i.p.), vehicle or no injection and tested in the 5-CSRTT or the LDEB. Only the lowest dose of guanfacine was used in the EPM assays. Key Results In the 5-CSRTT, a low dose of guanfacine (0.1 mg·kg−1) increased attention in NK1R−/− mice, but not in WT mice. This dose did not affect the total number of trials completed, latencies to respond or locomotor activity in the LDEB. Impulsivity was decreased by the high dose (1.0 mg·kg−1) of guanfacine, but this was evident in both genotypes and is likely to be secondary to a generalized blunting of behaviour. Although the NK1R−/− mice displayed marked anxiety-like behaviour, guanfacine did not affect the behaviour of either genotype in the EPM. Conclusions and Implications This evidence that guanfacine improves attention at a dose that did not affect arousal or emotionality supports our proposal that NK1R−/− mice express an attention deficit resembling that of ADHD patients. Linked Articles This article is part of a themed section on Animal Models in Psychiatry Research. To view the other articles in this section visit http://dx.doi.org/10.1111/bph.2014.171.issue-20
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Affiliation(s)
- Katharine Pillidge
- Department of Neuroscience, Physiology and Pharmacology, University College London, London, UK
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Grünblatt E, Bartl J, Iuhos DI, Knezovic A, Trkulja V, Riederer P, Walitza S, Salkovic-Petrisic M. Characterization of cognitive deficits in spontaneously hypertensive rats, accompanied by brain insulin receptor dysfunction. J Mol Psychiatry 2015; 3:6. [PMID: 26110057 PMCID: PMC4479234 DOI: 10.1186/s40303-015-0012-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 05/29/2015] [Indexed: 01/05/2023] Open
Abstract
Background The spontaneously hypertensive rat (SHR) has been used to model changes in the central nervous system associated with cognitive-related disorders. Recent human and animal studies indicate a possible relationship between cognitive deficits, insulin resistance and hypertension. We aimed to investigate whether cognitively impaired SHRs develop central and/or peripheral insulin resistance and how their cognitive performance is influenced by the animal’s sex and age as well as strains used for comparison (Wistar and Wistar-Kyoto/WKY). Methods Three and seven-month-old SHR, Wistar, and WKY rats were studied for their cognitive performance using Morris Water Maze (MWM) and Passive Avoidance tests (PAT). Plasma glucose and insulin were obtained after oral glucose tolerance tests. Cerebral cortex, hippocampus, and striatum status of insulin-receptor (IR) β-subunit and glycogen synthase kinase-3β (GSK3β) and their phosphorylated forms were obtained via ELISA. Results SHRs performed poorly in MWM and PAT in comparison to both control strains but more pronouncedly compared to WKY. Females performed poorer than males and 7-month-old SHRs had poorer MWM performance than 3-month-old ones. Although plasma glucose levels remained unchanged, plasma insulin levels were significantly increased in the glucose tolerance test in 7-month-old SHRs. SHRs demonstrated reduced expression and increased activity of IRβ-subunit in cerebral cortex, hippocampus, and striatum with different regional changes in phospho/total GSK3β ratio, as compared to WKYs. Conclusion Results indicate that cognitive deficits in SHRs are accompanied by both central and peripheral insulin dysfunction, thus allowing for the speculation that SHRs might additionally be considered as a model of insulin resistance-induced type of dementia. Electronic supplementary material The online version of this article (doi:10.1186/s40303-015-0012-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Edna Grünblatt
- University Clinics of Child and Adolescent Psychiatry, University of Zurich, Neumuensterallee 9, 8032 Zurich, Switzerland ; Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland ; University Hospital, Clinic and Policlinic for Psychiatry, Psychosomatic and Psychotherapy, University of Würzburg, Füchsleinstr. 15, D-97080 Würzburg, Germany ; University Clinics of Child and Adolescent Psychiatry, University of Zurich, Wagistrasse 12, CH-8952 Schlieren, Switzerland
| | - Jasmin Bartl
- University Clinics of Child and Adolescent Psychiatry, University of Zurich, Neumuensterallee 9, 8032 Zurich, Switzerland
| | - Diana-Iulia Iuhos
- University Hospital, Clinic and Policlinic for Psychiatry, Psychosomatic and Psychotherapy, University of Würzburg, Füchsleinstr. 15, D-97080 Würzburg, Germany
| | - Ana Knezovic
- Department of Pharmacology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Salata 11, 10 000 Zagreb, Croatia
| | - Vladimir Trkulja
- Department of Pharmacology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Salata 11, 10 000 Zagreb, Croatia
| | - Peter Riederer
- University Hospital, Clinic and Policlinic for Psychiatry, Psychosomatic and Psychotherapy, University of Würzburg, Füchsleinstr. 15, D-97080 Würzburg, Germany
| | - Susanne Walitza
- University Clinics of Child and Adolescent Psychiatry, University of Zurich, Neumuensterallee 9, 8032 Zurich, Switzerland ; Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Melita Salkovic-Petrisic
- Department of Pharmacology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Salata 11, 10 000 Zagreb, Croatia
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Kishikawa Y, Kawahara Y, Yamada M, Kaneko F, Kawahara H, Nishi A. The spontaneously hypertensive rat/Izm (SHR/Izm) shows attention deficit/hyperactivity disorder-like behaviors but without impulsive behavior: therapeutic implications of low-dose methylphenidate. Behav Brain Res 2014; 274:235-42. [PMID: 25151620 DOI: 10.1016/j.bbr.2014.08.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 08/06/2014] [Accepted: 08/11/2014] [Indexed: 01/20/2023]
Abstract
The spontaneously hypertensive rat (SHR) has been used as a genetic animal model of attention deficit/hyperactivity disorder (ADHD). SHR/Izm is derived from stroke-resistant SHR as SHR/NIH and SHR/NCrl but from 22nd to 23rd generation descendants of the SHR/NIH ancestor and therefore may show different behavioral phenotypes compared to other SHR sub-strains. In this study, ADHD-like behaviors in SHR/Izm were evaluated compared to Wistar rats. SHR/Izm showed high locomotor activity in the habituation phase in a novel environment, although locomotor activity in the initial exploratory phase was low. In a behavioral test for attention, spontaneous alternation behavior in the Y-maze test was impaired in SHR/Izm. However, impulsive behavior in the elevated-plus maze test, which is designed to detect anxiety-related behavior but also reflects impulsivity for novelty seeking, was comparable to Wistar rats. Hyperactivity and inattention, detected as ADHD-like behaviors in SHR/Izm, were ameliorated with methylphenidate at a low dose (0.05mg/kg, i.p.). Therefore, SHR/Izm represents a unique animal model of ADHD without anxiety-related impulsive behavior.
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Affiliation(s)
- Yuki Kishikawa
- Department of Pharmacology, Kurume University School of Medicine, Asahi-machi 67, Kurume, Fukuoka 830-0011, Japan.
| | - Yukie Kawahara
- Department of Pharmacology, Kurume University School of Medicine, Asahi-machi 67, Kurume, Fukuoka 830-0011, Japan.
| | - Makiko Yamada
- Department of Pharmacology, Kurume University School of Medicine, Asahi-machi 67, Kurume, Fukuoka 830-0011, Japan; Department of Psychiatry, Tokyo Women's Medical University, Kawada-Cho 8-1, Shinjuku-ku, Tokyo 168-8666, Japan.
| | - Fumi Kaneko
- Department of Pharmacology, Kurume University School of Medicine, Asahi-machi 67, Kurume, Fukuoka 830-0011, Japan.
| | - Hiroshi Kawahara
- Department of Dental Anesthesiology, School of Dentistry, Tsurumi University, Tsurumi 2-1-3, Tsurumi-ku, Yokohama, Kanagawa 230-8501, Japan.
| | - Akinori Nishi
- Department of Pharmacology, Kurume University School of Medicine, Asahi-machi 67, Kurume, Fukuoka 830-0011, Japan.
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36
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Ibias J, Pellón R. Different relations between schedule-induced polydipsia and impulsive behaviour in the Spontaneously Hypertensive Rat and in high impulsive Wistar rats: questioning the role of impulsivity in adjunctive behaviour. Behav Brain Res 2014; 271:184-94. [PMID: 24931797 DOI: 10.1016/j.bbr.2014.06.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 06/03/2014] [Accepted: 06/06/2014] [Indexed: 12/17/2022]
Abstract
Rats belonging to three different strains (15 Wistar, 8 Spontaneously Hypertensive - SHR- and 8 Wistar Kyoto - WKY-) were used to evaluate the possible relationship between different levels of impulsivity and development of schedule-induced polydipsia (SIP). We first measured the rats' levels of impulsivity by means of delay-discounting and indifference-point procedures. Secondly, development of SIP was studied under a series of fixed time 15, 30, 60 and 120s food schedules, which were counterbalanced by means of a Latin-square design. Finally, we re-assessed the rats' levels of impulsivity by replicating the delay-discounting test. The findings showed that, starting from equivalent levels of impulsivity, development of SIP differed among the groups of rats. In comparison with the rest of the animals, the SHRs were observed to attain elevated drinking rates under SIP. On the other hand, the Wistar rats which had initial high impulsivity levels similar to those of the SHRs, displayed the lowest rates of induced drinking. Moreover, low levels of impulsivity in Wistar rats prior to SIP acquisition were reflected into high drinking rates. Relation of SIP and impulsivity is questioned by present results, which gives ground to the understanding of the behavioural mechanisms involved in adjunctive behaviour and its usefulness as an animal model of excessive behaviour.
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Affiliation(s)
- Javier Ibias
- Animal Behaviour Laboratories, Facultad de Psicología, Universidad Nacional de Educación a Distancia (UNED), C/Juan del Rosal 10, Ciudad Universitaria, 28040 Madrid, Spain
| | - Ricardo Pellón
- Animal Behaviour Laboratories, Facultad de Psicología, Universidad Nacional de Educación a Distancia (UNED), C/Juan del Rosal 10, Ciudad Universitaria, 28040 Madrid, Spain.
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37
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Liso Navarro AA, Sikoglu EM, Heinze CR, Rogan RC, Russell VA, King JA, Moore CM. Effect of diet on brain metabolites and behavior in spontaneously hypertensive rats. Behav Brain Res 2014; 270:240-7. [PMID: 24855038 DOI: 10.1016/j.bbr.2014.05.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 04/22/2014] [Accepted: 05/12/2014] [Indexed: 01/13/2023]
Abstract
Attention-deficit hyperactivity disorder (ADHD) is a heterogeneous psychiatric disorder affecting 5-10% of children. One of the suggested mechanisms underlying the pathophysiology of ADHD is insufficient energy supply to neurons. Here, we investigated the role of omega 3 fatty acids in altering neural energy metabolism and behavior of spontaneously hypertensive rats (SHR), which is an animal model of ADHD. To this end, we employed Proton Magnetic Resonance Spectroscopy ((1)H MRS) to evaluate changes in brain neurochemistry in the SHR following consumption of one of three experimental diets (starting PND 21): fish oil enriched (FOE), regular (RD) and animal fat enriched (AFE) diet. Behavioral tests were performed to evaluate differences in locomotor activity and risk-taking behavior (starting PND 44). Comparison of frontal lobe metabolites showed that increased amounts of omega 3 fatty acids decreased total Creatine levels (tCr), but did not change Glutamate (Glu), total N-Acetylaspartate (tNAA), Lactate (Lac), Choline (Cho) or Inositol (Ino) levels. Although behavior was not significantly affected by different diets, significant correlations were observed between brain metabolites and behavior in the open field and elevated plus maze. SHR with higher levels of brain tCr and Glu exhibited greater hyperactivity in a familiar environment. On the other hand, risk-taking exploration of the elevated plus maze's open arms correlated negatively with forebrain tNAA and Lac levels. These findings support the possible alteration in energy metabolites in ADHD, correlating with hyperactivity in the animal model. The data also suggest that omega 3 fatty acids alter brain energy and phospholipid metabolism.
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Affiliation(s)
- Ana A Liso Navarro
- Center for Comparative Neuroimaging, Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA 01604, USA; Office Médico-Pédagogique, Department of Psychiatry, University of Geneva School of Medicine, 1 David Dufour, CP 50, 1211 Geneva 8, Switzerland
| | - Elif M Sikoglu
- Center for Comparative Neuroimaging, Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA 01604, USA
| | - Cailin R Heinze
- Department of Clinical Sciences, Tufts Cummings School of Veterinary Medicine, North Grafton, MA 01536, USA
| | - Ryan C Rogan
- Center for Comparative Neuroimaging, Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA 01604, USA
| | - Vivienne A Russell
- Division of Physiology, School of Laboratory and Medical Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
| | - Jean A King
- Center for Comparative Neuroimaging, Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA 01604, USA
| | - Constance M Moore
- Center for Comparative Neuroimaging, Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA 01604, USA.
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38
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O'Malley D, Julio-Pieper M, O'Mahony SM, Dinan TG, Cryan JF. Differential visceral pain sensitivity and colonic morphology in four common laboratory rat strains. Exp Physiol 2014; 99:359-367. [DOI: 10.1113/expphysiol.2013.076109] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Affiliation(s)
- Dervla O'Malley
- Alimentary Pharmabiotic Centre; BioSciences Institute
- Departments of Physiology
| | | | | | - Timothy G. Dinan
- Alimentary Pharmabiotic Centre; BioSciences Institute
- Psychiatry; University College Cork; Western Road Cork Ireland
| | - John F. Cryan
- Alimentary Pharmabiotic Centre; BioSciences Institute
- Anatomy and Neuroscience
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39
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Methylphenidate and venlafaxine attenuate locomotion in spontaneously hypertensive rats, an animal model of attention–deficit/hyperactivity disorder, through α2-adrenoceptor activation. Behav Pharmacol 2013; 24:328-31. [DOI: 10.1097/fbp.0b013e3283633648] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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40
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He W, Zhang Y, Wang X, Guo L, Han L, Liu E, Wang T. Zhizhu Decoction Promotes Gastric Emptying and Protects the Gastric Mucosa. J Med Food 2013; 16:306-11. [DOI: 10.1089/jmf.2012.2438] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Wei He
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
| | - Yi Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
| | - Xinrui Wang
- Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
| | - Lingling Guo
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
| | - Lifeng Han
- Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
| | - Erwei Liu
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
| | - Tao Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Ministry of Education, Tianjin, China
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Harvey RC, Jordan CJ, Tassin DH, Moody KR, Dwoskin LP, Kantak KM. Performance on a strategy set shifting task during adolescence in a genetic model of attention deficit/hyperactivity disorder: methylphenidate vs. atomoxetine treatments. Behav Brain Res 2013; 244:38-47. [PMID: 23376704 DOI: 10.1016/j.bbr.2013.01.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 01/18/2013] [Accepted: 01/24/2013] [Indexed: 11/17/2022]
Abstract
Research examining medication effects on set shifting in teens with attention deficit/hyperactivity disorder (ADHD) is lacking. An animal model of ADHD may be useful for exploring this gap. The spontaneously hypertensive rat (SHR) is a commonly used animal model of ADHD. SHR and two comparator strains, Wistar-Kyoto (WKY) and Wistar (WIS), were evaluated during adolescence in a strategy set shifting task under conditions of a 0s or 15s delay to reinforcer delivery. The task had three phases: initial discrimination, set shift and reversal learning. Under 0s delays, SHR performed as well as or better than WKY and WIS. Treatment with 0.3mg/kg/day atomoxetine had little effect, other than to modestly increase trials to criterion during set shifting in all strains. Under 15s delays, SHR had longer lever press reaction times, longer latencies to criterion and more trial omissions than WKY during set shifting and reversal learning. These deficits were not reduced systematically by 1.5mg/kg/day methylphenidate or 0.3mg/kg/day atomoxetine. Regarding learning in SHR, methylphenidate improved initial discrimination, whereas atomoxetine improved set shifting but disrupted initial discrimination. During reversal learning, both drugs were ineffective in SHR, and atomoxetine made reaction time and trial omissions greater in WKY. Overall, WIS performance differed from SHR or WKY, depending on phase. Collectively, a genetic model of ADHD in adolescent rats revealed that neither methylphenidate nor atomoxetine mitigated all deficits in SHR during the set shifting task. Thus, methylphenidate or atomoxetine monotherapy may not mitigate all set shift task-related deficits in teens with ADHD.
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Affiliation(s)
- Roxann C Harvey
- Department of Psychology, Boston University, Boston, MA 02215, USA
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Turner M, Wilding E, Cassidy E, Dommett EJ. Effects of atomoxetine on locomotor activity and impulsivity in the spontaneously hypertensive rat. Behav Brain Res 2012; 243:28-37. [PMID: 23266523 DOI: 10.1016/j.bbr.2012.12.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/11/2012] [Accepted: 12/15/2012] [Indexed: 11/30/2022]
Abstract
Atomoxetine (ATX) is a commonly used non-stimulant treatment for Attention deficit hyperactivity disorder (ADHD). It primarily acts to increase noradrenalin levels; however, at higher doses it can increase dopamine levels. To date there has been no investigations into the effects of orally-administered ATX in the most commonly used model of ADHD, the spontaneously hypertensive rat (SHR). The aim of this study was to describe the effects of doses thought to be selective (0.15 mg/kg) and non-selective (0.3 mg/kg) for noradrenalin on behavioural measures in the SHR. Firstly, we examined the effects of acute and chronic ATX on locomotor activity including sensitisation and cross-sensitisation to amphetamine. Secondly, we measured drug effects on impulsivity using a T-maze delay discounting paradigm. We found no effect of ATX on locomotor activity and no evidence for sensitisation or cross-sensitisation. Furthermore, there were no differences in T-maze performance, indicating no effects on impulsivity at these doses. The absence of behavioural sensitisation supports previous claims of superior safety relative to psychostimulants for the doses administered. There was also no effect on impulsivity; however, we suggest that was confounded by stress specific to SHRs. Implications for future studies, behavioural assessment of SHRs and their use as a model of ADHD are discussed.
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Affiliation(s)
- Michael Turner
- Brain and Behavioural Sciences, Dept of Life, Health and Chemical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
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O'Neill B, Gu HH. Amphetamine-induced locomotion in a hyperdopaminergic ADHD mouse model depends on genetic background. Pharmacol Biochem Behav 2012; 103:455-9. [PMID: 23026058 DOI: 10.1016/j.pbb.2012.09.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 08/28/2012] [Accepted: 09/23/2012] [Indexed: 10/27/2022]
Abstract
We previously generated a knock-in mouse line with a cocaine-insensitive dopamine transporter (DAT-CI mice). These mice lost several behavioral responses to cocaine, but retained their response to amphetamine. DAT-CI mice are hyperdopaminergic due to reduced DAT function, and may thus be a good model for studying attention deficit hyperactivity disorder (ADHD). These mice had been behaviorally characterized while they were on a mixed genetic background. However as the colony was propagated over time, the mixed genetics were shifted toward a pure C57Bl/6J background--via a common breeding scheme known as "backcrossing." Several phenotypes appeared to have changed during this time frame. In this study, we investigated whether backcrossing altered the hyperlocomotive phenotype and behavioral responses to amphetamine, a drug used to treat ADHD. C57-congenic DAT-CI mice had high spontaneous locomotor activity that could be suppressed by low doses of amphetamine. Furthermore, their locomotion was not stimulated by very high doses of amphetamine (20mg/kg). After the reversion to a mixed genetic background by breeding with the 129 strain, the C57:129 hybrid DAT-CI mice displayed reduced basal locomotor activity compared to the C57-congenic mutant mice, and regained locomotor stimulation by high-dose amphetamine. The calming effect of amphetamine at low doses was retained in both strains. In summary, reduced DAT function in DAT-CI mice leads to a hyperdopaminergic state, and an ADHD-like phenotype in both strains. The data show that the genetic background of DAT-CI mice affects their locomotor phenotypes and their responses to amphetamine. Since the differences in genetic background between the strains of mice have a significant impact on the ADHD-like phenotype and the response to amphetamine, further study with these strains could identify the genetic underpinnings affecting the severity of ADHD-related symptoms and the treatment response.
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Affiliation(s)
- Brian O'Neill
- Department of Pharmacology, The Ohio State University, 333W 10th Ave, Columbus, OH 43210, USA.
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44
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Schroeder M, Sultany T, Weller A. Prenatal stress effects on emotion regulation differ by genotype and sex in prepubertal rats. Dev Psychobiol 2012; 55:176-92. [DOI: 10.1002/dev.21010] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 12/23/2011] [Indexed: 11/11/2022]
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45
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Maternal hypertension during pregnancy modifies the response of the immature brain to hypoxia–ischemia: Sequential MRI and behavioral investigations. Exp Neurol 2012; 233:264-72. [DOI: 10.1016/j.expneurol.2011.10.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 10/10/2011] [Accepted: 10/17/2011] [Indexed: 11/17/2022]
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