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Jalewa J, Todd J, Michie PT, Hodgson DM, Harms L. The effect of schizophrenia risk factors on mismatch responses in a rat model. Psychophysiology 2023; 60:e14175. [PMID: 36087044 PMCID: PMC10909418 DOI: 10.1111/psyp.14175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 06/28/2022] [Accepted: 08/04/2022] [Indexed: 01/06/2023]
Abstract
Reduced mismatch negativity (MMN), a robust finding in schizophrenia, has prompted interest in MMN as a preclinical biomarker of schizophrenia. The rat brain can generate human-like mismatch responses (MMRs) which therefore enables the exploration of the neurobiology of reduced MMRs. Given epidemiological evidence that two developmental factors, maternal infection and adolescent cannabis use, increase the risk of schizophrenia, we determined the effect of these two developmental risk factors on rat MMR amplitude in different auditory contexts. MMRs were assessed in awake adult male and female Wistar rats that were offspring of pregnant dams treated with either a viral infection mimetic (poly I:C) inducing maternal immune activation (MIA) or saline control. In adolescence, subgroups of the prenatal treatment groups were exposed to either a synthetic cannabinoid (adolescent cannabinoid exposure: ACE) or vehicle. The context under which MMRs were obtained was manipulated by employing two different oddball paradigms, one that manipulated the physical difference between rare and common auditory stimuli, and another that manipulated the probability of the rare stimulus. The design of the multiple stimulus sequences across the two paradigms also allowed an investigation of context on MMRs to two identical stimulus sequences. Male offspring exposed to each of the risk factors for schizophrenia (MIA, ACE or both) showed a reduction in MMR, which was evident only in the probability paradigm, with no effects seen in the physical difference. Our findings highlight the importance of contextual factors induced by paradigm manipulations and sex for modeling schizophrenia-like MMN impairments in rats.
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Affiliation(s)
- Jaishree Jalewa
- School of Psychological Sciences, College of Engineering, Science and EnvironmentUniversity of NewcastleCallaghanNew South WalesAustralia
| | - Juanita Todd
- School of Psychological Sciences, College of Engineering, Science and EnvironmentUniversity of NewcastleCallaghanNew South WalesAustralia
- Hunter Medical Research InstituteNew Lambton HeightsNew South WalesAustralia
| | - Patricia T. Michie
- School of Psychological Sciences, College of Engineering, Science and EnvironmentUniversity of NewcastleCallaghanNew South WalesAustralia
- Hunter Medical Research InstituteNew Lambton HeightsNew South WalesAustralia
| | - Deborah M. Hodgson
- School of Psychological Sciences, College of Engineering, Science and EnvironmentUniversity of NewcastleCallaghanNew South WalesAustralia
- Hunter Medical Research InstituteNew Lambton HeightsNew South WalesAustralia
| | - Lauren Harms
- Hunter Medical Research InstituteNew Lambton HeightsNew South WalesAustralia
- School of Biomedical Science and Pharmacy, College of Health, Medicine and WellbeingUniversity of NewcastleCallaghanNew South WalesAustralia
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Yang HJ, Kim MJ, Kim SS, Cho YW. Melatonin modulates nitric oxide-regulated WNK-SPAK/OSR1-NKCC1 signaling in dorsal raphe nucleus of rats. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2021; 25:449-457. [PMID: 34448462 PMCID: PMC8405441 DOI: 10.4196/kjpp.2021.25.5.449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/21/2021] [Accepted: 07/20/2021] [Indexed: 11/15/2022]
Abstract
The sleep-wake cycle is regulated by the alternating activity of sleep- and wake-promoting neurons. The dorsal raphe nucleus (DRN) secretes 5-hydroxytryptamine (5-HT, serotonin), promoting wakefulness. Melatonin secreted from the pineal gland also promotes wakefulness in rats. Our laboratory recently demonstrated that daily changes in nitric oxide (NO) production regulates a signaling pathway involving with-no-lysine kinase (WNK), Ste20-related proline alanine rich kinase (SPAK)/oxidative stress response kinase 1 (OSR1), and cation-chloride co-transporters (CCC) in rat DRN serotonergic neurons. This study was designed to investigate the effect of melatonin on NO-regulated WNK-SPAK/OSR1-CCC signaling in wake-inducing DRN neurons to elucidate the mechanism underlying melatonin's wake-promoting actions in rats. Ex vivo treatment of DRN slices with melatonin suppressed neuronal nitric oxide synthase (nNOS) expression and increased WNK4 expression without altering WNK1, 2, or 3. Melatonin increased phosphorylation of OSR1 and the expression of sodium-potassium-chloride co-transporter 1 (NKCC1), while potassium-chloride cotransporter 2 (KCC2) remained unchanged. Melatonin increased the expression of tryptophan hydroxylase 2 (TPH2, serotonin-synthesizing enzyme). The present study suggests that melatonin may promote its wakefulness by modulating NO-regulated WNK-SPAK/OSR1-KNCC1 signaling in rat DRN serotonergic neurons.
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Affiliation(s)
- Hye Jin Yang
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Mi Jung Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul 02447, Korea.,Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Sung Soo Kim
- Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, College of Medicine, Kyung Hee University, Seoul 02447, Korea.,Department of Biochemistry and Molecular Biology, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Young-Wuk Cho
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Korea.,Department of Physiology, College of Medicine, Kyung Hee University, Seoul 02447, Korea.,Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, College of Medicine, Kyung Hee University, Seoul 02447, Korea
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O'Reilly JA, Conway BA. Classical and controlled auditory mismatch responses to multiple physical deviances in anaesthetised and conscious mice. Eur J Neurosci 2020; 53:1839-1854. [DOI: 10.1111/ejn.15072] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/16/2020] [Accepted: 11/26/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Jamie A. O'Reilly
- College of Biomedical Engineering Rangsit University Pathum Thani Thailand
| | - Bernard A. Conway
- Department of Biomedical Engineering University of Strathclyde Glasgow UK
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Jalewa J, Todd J, Michie PT, Hodgson DM, Harms L. Do rat auditory event related potentials exhibit human mismatch negativity attributes related to predictive coding? Hear Res 2020; 399:107992. [PMID: 32571607 DOI: 10.1016/j.heares.2020.107992] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/29/2020] [Accepted: 05/04/2020] [Indexed: 01/11/2023]
Abstract
Rodent models play a significant role in understanding disease mechanisms and the screening of new treatments. With regard to psychiatric disorders such as schizophrenia, however, it is difficult to replicate the human symptoms in rodents because these symptoms are often either 'uniquely human' or are only conveyed via self-report. There is a growing interest in rodent mismatch responses (MMRs) as a translatable 'biomarker' for disorders such as schizophrenia. In this review, we will summarize the attributes of human MMN, and discuss the scope of exploring the attributes of human MMN in rodents. Here, we examine how reliably MMRs that are measured in rats mimic human attributes, and present original data examining whether manipulations of stimulus conditions known to modulate human MMN, do the same for rat MMRs. Using surgically-implanted epidural electroencephalographic electrodes and wireless telemetry in freely-moving rats, we observed human-like modulations of MMRs, namely that larger MMRs were elicited to unexpected (deviant) stimuli that a) had a larger change in pitch compared to the expected (standard) stimulus, b) were less frequently presented (lower probability), and c) had no jitter (stable stimulus onset asynchrony) compared to high jitter. Overall, these findings contribute to the mounting evidence for rat MMRs as a good analogue of human MMN, bolstering the development of a novel approach in future to validate the preclinical models based on a translatable biomarker, MMN.
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Affiliation(s)
- Jaishree Jalewa
- School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Juanita Todd
- School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia; Priority Research Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, New South Wales, Australia; Hunter Medical Research Institute, New Lambton Heights, New South Wales, Australia
| | - Patricia T Michie
- School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia; Priority Research Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, New South Wales, Australia; Hunter Medical Research Institute, New Lambton Heights, New South Wales, Australia
| | - Deborah M Hodgson
- School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia; Priority Research Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, New South Wales, Australia; Hunter Medical Research Institute, New Lambton Heights, New South Wales, Australia
| | - Lauren Harms
- Priority Research Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, New South Wales, Australia; Hunter Medical Research Institute, New Lambton Heights, New South Wales, Australia; School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, New South Wales, Australia.
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Shiramatsu TI, Takahashi H. Mismatch-negativity (MMN) in animal models: Homology of human MMN? Hear Res 2020; 399:107936. [PMID: 32197715 DOI: 10.1016/j.heares.2020.107936] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 02/11/2020] [Accepted: 03/02/2020] [Indexed: 02/06/2023]
Abstract
Mismatch negativity (MMN) has long been considered to be one of the deviance-detecting neural characteristics. Animal models exhibit similar neural activities, called MMN-like responses; however, there has been considerable debate on whether MMN-like responses are homologous to MMN in humans. Herein, we reviewed several studies that compared the electrophysiological, pharmacological, and functional properties of MMN-like responses and adaptation-exhibiting middle-latency responses (MLRs) in animals with those in humans. Accumulating evidence suggests that there are clear differences between MMN-like responses and MLRs, in particular that MMN-like responses can be distinguished from mere effects of adaptation, i.e., stimulus-specific adaptation. Finally, we discuss a new direction for research on MMN-like responses by introducing our recent work, which demonstrated that MMN-like responses represent empirical salience of deviant stimuli, suggesting a new functional role of MMN beyond simple deviance detection.
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Affiliation(s)
| | - Hirokazu Takahashi
- Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, 113-8656, Japan.
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Yang T, Hämäläinen JA, Lohvansuu K, Lipponen A, Penttonen M, Astikainen P. Deviance detection in sound frequency in simple and complex sounds in urethane-anesthetized rats. Hear Res 2019; 399:107814. [PMID: 31672403 DOI: 10.1016/j.heares.2019.107814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 10/04/2019] [Accepted: 10/09/2019] [Indexed: 11/26/2022]
Abstract
Mismatch negativity (MMN), which is an electrophysiological response demonstrated in humans and animals, reflects memory-based deviance detection in a series of sounds. However, only a few studies on rodents have used control conditions that were sufficient in eliminating confounding factors that could also explain differential responses to deviant sounds. Furthermore, it is unclear if change detection occurs similarly for sinusoidal and complex sounds. In this study, we investigated frequency change detection in urethane-anesthetized rats by recording local-field potentials from the dura above the auditory cortex. We studied change detection in sinusoidal and complex sounds in a series of experiments, controlling for sound frequency, probability, and pattern in a series of sounds. For sinusoidal sounds, the MMN controlled for frequency, adaptation, and pattern, was elicited at approximately 200 ms onset latency. For complex sounds, the MMN controlled for frequency and adaptation, was elicited at 60 ms onset latency. Sound frequency affected the differential responses. MMN amplitude was larger for the sinusoidal sounds than for the complex sounds. These findings indicate the importance of controlling for sound frequency and stimulus probabilities, which have not been fully controlled for in most previous animal and human studies. Future studies should confirm the preference for sinusoidal sounds over complex sounds in rats.
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Affiliation(s)
- Tiantian Yang
- Department of Psychology, University of Jyvaskyla, P.O. Box 35, 40014, Jyväskylä, Finland.
| | - Jarmo A Hämäläinen
- Department of Psychology, University of Jyvaskyla, P.O. Box 35, 40014, Jyväskylä, Finland.
| | - Kaisa Lohvansuu
- Department of Psychology, University of Jyvaskyla, P.O. Box 35, 40014, Jyväskylä, Finland.
| | - Arto Lipponen
- Department of Psychology, University of Jyvaskyla, P.O. Box 35, 40014, Jyväskylä, Finland.
| | - Markku Penttonen
- Department of Psychology, University of Jyvaskyla, P.O. Box 35, 40014, Jyväskylä, Finland.
| | - Piia Astikainen
- Department of Psychology, University of Jyvaskyla, P.O. Box 35, 40014, Jyväskylä, Finland.
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Double-epoch subtraction reveals long-latency mismatch response in urethane-anaesthetized mice. J Neurosci Methods 2019; 326:108375. [DOI: 10.1016/j.jneumeth.2019.108375] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 11/21/2022]
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Jodo E, Inaba H, Narihara I, Sotoyama H, Kitayama E, Yabe H, Namba H, Eifuku S, Nawa H. Neonatal exposure to an inflammatory cytokine, epidermal growth factor, results in the deficits of mismatch negativity in rats. Sci Rep 2019; 9:7503. [PMID: 31097747 PMCID: PMC6522493 DOI: 10.1038/s41598-019-43923-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 04/30/2019] [Indexed: 01/12/2023] Open
Abstract
Perinatal exposure to epidermal growth factor (EGF) induces various cognitive and behavioral abnormalities after maturation in non-human animals, and is used for animal models of schizophrenia. Patients with schizophrenia often display a reduction of mismatch negativity (MMN), which is a stimulus-change specific event-related brain potential. Do the EGF model animals also exhibit the MMN reduction as schizophrenic patients do? This study addressed this question to verify the pathophysiological validity of this model. Neonatal rats received repeated administration of EGF or saline and were grown until adulthood. Employing the odd-ball paradigm of distinct tone pitches, tone-evoked electroencephalogram (EEG) components were recorded from electrodes on the auditory and frontal cortices of awake rats, referencing an electrode on the frontal sinus. The amplitude of the MMN-like potential was significantly reduced in EGF-treated rats compared with saline-injected control rats. The wavelet analysis of the EEG during a near period of tone stimulation revealed that synchronization of EEG activity, especially with beta and gamma bands, was reduced in EGF-treated rats. Results suggest that animals exposed to EGF during a perinatal period serve as a promising neurodevelopmental model of schizophrenia.
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Affiliation(s)
- Eiichi Jodo
- Department of Systems Neuroscience, Fukushima Medical University School of Medicine, Fukushima, 960-1295, Japan.
| | - Hiroyoshi Inaba
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Itaru Narihara
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Hidekazu Sotoyama
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Eiko Kitayama
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Hirooki Yabe
- Department of Neuropsychiatry, Fukushima Medical University School of Medicine, Fukushima, 960-1295, Japan
| | - Hisaaki Namba
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
| | - Satoshi Eifuku
- Department of Systems Neuroscience, Fukushima Medical University School of Medicine, Fukushima, 960-1295, Japan
| | - Hiroyuki Nawa
- Department of Molecular Neurobiology, Brain Research Institute, Niigata University, Niigata, 951-8585, Japan
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Aleksandrov AA, Knyazeva VM, Volnova AB, Dmitrieva ES, Polyakova NV, Gainetdinov RR. Trace Amine-Associated Receptor 1 Agonist Modulates Mismatch Negativity-Like Responses in Mice. Front Pharmacol 2019; 10:470. [PMID: 31130864 PMCID: PMC6509589 DOI: 10.3389/fphar.2019.00470] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/15/2019] [Indexed: 01/12/2023] Open
Abstract
The trace amine-associated receptor 1 (TAAR1) is a G protein-coupled receptor widely expressed in the mammalian brain, particularly in limbic system and monoaminergic areas. It has proven to be an important modulator of dopaminergic, serotoninergic, and glutamatergic neurotransmission and is considered to be a potential useful target for the pharmacotherapy of neuropsychiatric disorders, including schizophrenia. One of the promising schizophrenia endophenotypes is a deficit in neurocognitive abilities manifested as mismatch negativity (MMN) deficit. This study examines the effect of TAAR1 partial agonist RO5263397 on the MMN-like response in freely moving C57BL/6 mice. Event-related potentials (ERPs) were recorded from awake mice in the oddball paradigm before and after RO5263397 administration. The RO5263397 (but not saline) administration increased the N40 amplitude in response to deviant stimuli. That provided the MMN-like difference at the 36-44 ms interval after the injection. The pitch deviance-elicited changes before the injection and in the control paradigm were established for the P68 component. After TAAR1 agonist administration the P68 amplitude in response both to standard and deviant stimuli was increased. These results suggest that the MMN-like response in mice may be modulated through TAAR1-dependent processes (possibly acting through the direct or indirect glutamate NMDA receptor modulation), indicating the TAAR1 agonists potential antipsychotic and pro-cognitive activity.
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Affiliation(s)
- Aleksander A. Aleksandrov
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Veronika M. Knyazeva
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Anna B. Volnova
- Department of General Physiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Elena S. Dmitrieva
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Nadezhda V. Polyakova
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Raul R. Gainetdinov
- Institute of Translational Biomedicine and Saint Petersburg University Hospital, Saint Petersburg State University, Saint Petersburg, Russia
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Kim MJ, Yang HJ, Kim Y, Kang I, Kim SS, Cho YW. Role of nitric oxide and WNK-SPAK/OSR1-KCC2 signaling in daily changes in GABAergic inhibition in the rat dorsal raphe neurons. Neuropharmacology 2018; 135:355-367. [PMID: 29596900 DOI: 10.1016/j.neuropharm.2018.03.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 03/23/2018] [Accepted: 03/24/2018] [Indexed: 11/20/2022]
Abstract
Serotonergic neurons in the dorsal raphe nucleus (DRN) act as wake-inducing neurons in the sleep-wake cycle and are controlled by gamma-aminobutyric acid (GABA) synaptic inputs. We investigated daily changes in GABAergic inhibition of the rat DRN neurons and the role of nitric oxide (NO) and cation-chloride co-transporters in the GABAergic action. Neuronal NO synthase (nNOS) was co-expressed in 74% of serotonergic DRN neurons and nNOS expression was higher during daytime (the sleep cycle) than that during nighttime (the wake cycle). GABAergic hyperpolarization of DRN neurons produced by GABAA receptor agonist muscimol was greater and the equilibrium potential of muscimol showed a hyperpolarizing shift during daytime compared to that during nighttime. Expression levels of potassium-chloride co-transporter 2 (KCC2) were higher during daytime than that during nighttime, whereas there were no changes in sodium-potassium-chloride co-transporter 1 (NKCC1) expression. With-no-lysine kinase (WNK) isoform 1 was more highly expressed during daytime than that during nighttime. Total Ste20-related proline alanine rich kinase (SPAK) and oxidative stress response kinase 1 (OSR1) were also higher during daytime than during nighttime, while there were no changes in phosphorylated SPAK and OSR1. Consistent with the findings during the sleep-wake cycle, ex vivo treatment of DRN slices with a NO donor sodium nitroprusside (SNP) increased the expression of KCC2, WNK1, WNK2, WNK3, SPAK, and OSR1, whilst decreasing phosphorylated SPAK. These results suggest that GABAergic synaptic inhibition of DRN serotonergic neurons shows daily changes during the sleep-wake cycle, which might be regulated by daily changes in nNOS-derived NO and WNK-SPAK/OSR1-KCC2 signaling.
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Affiliation(s)
- Mi Jung Kim
- Department of Physiology, Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, School of Medicine, Kyung Hee University, Seoul 02447, South Korea
| | - Hye Jin Yang
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, South Korea
| | - Younghoon Kim
- Department of Physiology, Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, School of Medicine, Kyung Hee University, Seoul 02447, South Korea
| | - Insug Kang
- Department of Biochemistry and Molecular Biology, Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, School of Medicine, Kyung Hee University, Seoul 02447, South Korea
| | - Sung Soo Kim
- Department of Biochemistry and Molecular Biology, Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, School of Medicine, Kyung Hee University, Seoul 02447, South Korea
| | - Young-Wuk Cho
- Department of Physiology, Biomedical Science Institute and Medical Research Center for Reactive Oxygen Species, School of Medicine, Kyung Hee University, Seoul 02447, South Korea; Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, South Korea.
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Identification of TAAR5 Agonist Activity of Alpha-NETA and Its Effect on Mismatch Negativity Amplitude in Awake Rats. Neurotox Res 2018; 34:442-451. [DOI: 10.1007/s12640-018-9902-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/06/2018] [Accepted: 04/09/2018] [Indexed: 12/20/2022]
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Wang N, Gan X, Liu Y, Xiao Z. Balanced Noise-Evoked Excitation and Inhibition in Awake Mice CA3. Front Physiol 2017; 8:931. [PMID: 29209230 PMCID: PMC5702325 DOI: 10.3389/fphys.2017.00931] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 11/02/2017] [Indexed: 11/13/2022] Open
Abstract
The hippocampus is known as a neuronal structure involved in learning, memory and spatial navigation using multi-sensory cues. However, the basic features of its response to acoustic stimuli without any behavioral tasks (conditioning) remains poorly studied. Here, we investigated the CA3 response to auditory stimuli using in vivo loose-patch recordings in awake and anesthetized C57 mice. Different acoustic stimuli in addition to broadband noise such as click, FM sound and pure tone were applied to test the response of CA3 in awake animals. It was found that the wakefulness of the animal is important for the recorded neurons to respond. The CA3 neurons showed a stronger response to broadband noise rather than the other type of stimuli which suggested that auditory information arrived at CA3 via broadband pathways. Finally, we investigated the excitatory and inhibitory inputs to CA3 neurons by using in vivo whole-cell voltage-clamp techniques with the membrane potential holding at −70 and 0 mV, respectively. In awake animals, the excitatory and inhibitory inputs CA3 neurons receive induced by noise are balanced by showing stable intervals and proportional changes of their latencies and peak amplitudes as a function of the stimulation intensities.
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Affiliation(s)
- Ningqian Wang
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xiong Gan
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Yun Liu
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Zhongju Xiao
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
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Harms L, Michie PT, Näätänen R. Criteria for determining whether mismatch responses exist in animal models: Focus on rodents. Biol Psychol 2016. [DOI: 10.1016/j.biopsycho.2015.07.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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