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Wang YL, Wang JG, Guo S, Guo FL, Liu EJ, Yang X, Feng B, Wang JZ, Vreugdenhil M, Lu CB. Oligomeric β-Amyloid Suppresses Hippocampal γ-Oscillations through Activation of the mTOR/S6K1 Pathway. Aging Dis 2023:AD.2023.0123. [PMID: 37163441 PMCID: PMC10389838 DOI: 10.14336/ad.2023.0123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 01/23/2023] [Indexed: 05/12/2023] Open
Abstract
Neuronal synchronization at gamma frequency (30-100 Hz: γ) is impaired in early-stage Alzheimer's disease (AD) patients and AD models. Oligomeric Aβ1-42 caused a concentration-dependent reduction of γ-oscillation strength and regularity while increasing its frequency. The mTOR1 inhibitor rapamycin prevented the Aβ1-42-induced suppression of γ-oscillations, whereas the mTOR activator leucine mimicked the Aβ1-42-induced suppression. Activation of the downstream kinase S6K1, but not inhibition of eIF4E, was required for the Aβ1-42-induced suppression. The involvement of the mTOR/S6K1 signaling in the Aβ1-42-induced suppression was confirmed in Aβ-overexpressing APP/PS1 mice, where inhibiting mTOR or S6K1 restored degraded γ-oscillations. To assess the network changes that may underlie the mTOR/S6K1 mediated γ-oscillation impairment in AD, we tested the effect of Aβ1-42 on IPSCs and EPSCs recorded in pyramidal neurons. Aβ1-42 reduced EPSC amplitude and frequency and IPSC frequency, which could be prevented by inhibiting mTOR or S6K1. These experiments indicate that in early AD, oligomer Aβ1-42 impairs γ-oscillations by reducing inhibitory interneuron activity by activating the mTOR/S6K1 signaling pathway, which may contribute to early cognitive decline and provides new therapeutic targets.
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Affiliation(s)
- Ya-Li Wang
- Department of Physiology and Pathophysiology, Henan International Joint Laboratory of Non-Invasive Neuromodulation, Xinxiang Medical University, Xinxiang, China
| | - Jian-Gang Wang
- Department of Physiology and Pathophysiology, Henan International Joint Laboratory of Non-Invasive Neuromodulation, Xinxiang Medical University, Xinxiang, China
| | - Shuling Guo
- Department of Cardiovascular Medicine, Luminghu District, Xuchang Central Hospital, Xuchang, China
| | - Fang-Li Guo
- Department of Neurology, Anyang District Hospital of Puyang City, Anyang, China
| | - En-Jie Liu
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xin Yang
- Key Laboratory of Translational Research for Brain Diseases, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Bingyan Feng
- Department of Physiology and Pathophysiology, Henan International Joint Laboratory of Non-Invasive Neuromodulation, Xinxiang Medical University, Xinxiang, China
| | - Jian-Zhi Wang
- Department of Pathophysiology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Martin Vreugdenhil
- Department of Life Sciences, Birmingham City University, Birmingham, UK
- Department of Psychology, Xinxiang Medical University, Xinxiang, China
| | - Cheng-Biao Lu
- Department of Physiology and Pathophysiology, Henan International Joint Laboratory of Non-Invasive Neuromodulation, Xinxiang Medical University, Xinxiang, China
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Embryonic Deletion of TXNIP in GABAergic Neurons Enhanced Oxidative Stress in PV+ Interneurons in Primary Somatosensory Cortex of Aging Mice: Relevance to Schizophrenia. Brain Sci 2022; 12:brainsci12101395. [PMID: 36291328 PMCID: PMC9599691 DOI: 10.3390/brainsci12101395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/27/2022] [Accepted: 10/12/2022] [Indexed: 12/04/2022] Open
Abstract
The brain is susceptible to perturbations of redox balance, affecting neurogenesis and increasing the risks of psychiatric disorders. Thioredoxin-interacting protein (TXNIP) is an endogenous inhibitor of the thioredoxin antioxidant system. Its deletion or inhibition suggests protection for a brain with ischemic stroke or Alzheimer’s disease. Combined with conditional knockout mice and schizophrenia samples, we aimed to investigate the function of TXNIP in healthy brain and psychiatric disorders, which are under-studied. We found TXNIP was remarkedly expressed in the prefrontal cortex (PFC) during healthy mice’s prenatal and early postnatal periods, whereas it rapidly decreased throughout adulthood. During early life, TXNIP was primarily distributed in inhibitory and excitatory neurons. Contrary to the protective effect, the embryonic deletion of TXNIP in GABAergic (gamma-aminobutyric acid-ergic) neurons enhanced oxidative stress in PV+ interneurons of aging mice. The deleterious impact was brain region-specific. We also investigated the relationship between TXNIP and schizophrenia. TXNIP was significantly increased in the PFC of schizophrenia-like mice after MK801 administration, followed by oxidative stress. First episode and drug naïve schizophrenia patients with a higher level of plasma TXNIP displayed severer psychiatric symptoms than patients with a low level. We indicated a bidirectional function of TXNIP in the brain, whose high expression in the early stage is protective for development but might be harmful in a later period, associated with mental disorders.
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The Effect of 40-Hz White LED Therapy on Structure-Function of Brain Mitochondrial ATP-Sensitive Ca-Activated Large-Conductance Potassium Channel in Amyloid Beta Toxicity. Neurotox Res 2022; 40:1380-1392. [PMID: 36057039 DOI: 10.1007/s12640-022-00565-9] [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: 04/06/2022] [Revised: 06/07/2022] [Accepted: 08/19/2022] [Indexed: 10/14/2022]
Abstract
Photobiomodulation therapy has become the focus of medical research in many areas such as Alzheimer's disease (AD), because of its modulatory effect on cellular processes through light energy absorption via photoreceptors/chromophores located in the mitochondria. However, there are still many questions around the underlying mechanisms. This study was carried out to unravel whether the function-structure of ATP-sensitive mitoBKCa channels, as crucial components for maintenance of mitochondrial homeostasis, can be altered subsequent to light therapy in AD. Induction of Aβ neurotoxicity in male Wistar rats was done by intracerebroventricular injection of Aβ1-42. After a week, light-treated rats were exposed to 40-Hz white light LEDs, 15 min for 7 days. Electrophysiological properties of mitoBKCa channel were investigated using a channel incorporated into the bilayer lipid membrane, and mitoBKCa-β2 subunit expression was determined using western blot analysis in Aβ-induced toxicity and light-treated rats. Our results describe that conductance and open probability (Po) of mitoBKCa channel decreased significantly and was accompanied by a Po curve rightward shift in mitochondrial preparation in Aβ-induced toxicity rats. We also showed a significant reduction in expression of mitoBKCa-β2 subunit, which is partly responsible for a leftward shift in BKCa Po curve in low calcium status. Interestingly, we provided evidence of a significant improvement in channel conductance and Po after light therapy. We also found that light therapy improved mitoBKCa-β2 subunit expression, increasing it close to saline group. The current study explains a light therapy improvement in brain mitoBKCa channel function in the Aβ-induced neurotoxicity rat model, an effect that can be linked to increased expression of β2 subunit.
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Wang Y, Jin YK, Guo TC, Li ZR, Feng BY, Han JH, Vreugdenhil M, Lu CB. Activation of Dopamine 4 Receptor Subtype Enhances Gamma Oscillations in Hippocampal Slices of Aged Mice. Front Aging Neurosci 2022; 14:838803. [PMID: 35370600 PMCID: PMC8966726 DOI: 10.3389/fnagi.2022.838803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 02/17/2022] [Indexed: 11/26/2022] Open
Abstract
Aim Neural network oscillation at gamma frequency band (γ oscillation, 30–80 Hz) is synchronized synaptic potentials important for higher brain processes and altered in normal aging. Recent studies indicate that activation of dopamine 4 receptor (DR4) enhanced hippocampal γ oscillation of young mice and fully recovered the impaired hippocampal synaptic plasticity of aged mice, we determined whether this receptor is involved in aging-related modulation of hippocampal γ oscillation. Methods We recorded γ oscillations in the hippocampal CA3 region from young and aged C57bl6 mice and investigated the effects of dopamine and the selective dopamine receptor (DR) agonists on γ oscillation. Results We first found that γ oscillation power (γ power) was reduced in aged mice compared to young mice, which was restored by exogenous application of dopamine (DA). Second, the selective agonists for different D1- and D2-type dopamine receptors increased γ power in young mice but had little or small effect in aged mice. Third, the D4 receptor (D4R) agonist PD168077 caused a large increase of γ power in aged mice but a small increase in young mice, and its effect is blocked by the highly specific D4R antagonist L-745,870 or largely reduced by a NMDAR antagonist. Fourth, D3R agonist had no effect on γ power of either young or aged mice. Conclusion This study reveals DR subtype-mediated hippocampal γ oscillations is aging-related and DR4 activation restores the impaired γ oscillations in aged brain, and suggests that D4R is the potential target for the improvement of cognitive deficits related to the aging and aging-related diseases.
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Affiliation(s)
- Yuan Wang
- Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang, China
| | - Yi-Kai Jin
- Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang, China
| | - Tie-Cheng Guo
- Department of Rehabilitation Medicine, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Zhen-Rong Li
- Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang, China
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Bing-Yan Feng
- Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang, China
| | - Jin-Hong Han
- Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang, China
| | - Martin Vreugdenhil
- Department of Health Sciences, Birmingham City University, Birmingham, United Kingdom
- *Correspondence: Martin Vreugdenhil,
| | - Cheng-Biao Lu
- Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang, China
- Cheng-Biao Lu,
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Nazari M, Vajed-Samiei T, Torabi N, Fahanik-Babaei J, Saghiri R, Khodagholi F, Eliassi A. The 40-Hz White Light-Emitting Diode (LED) Improves the Structure-Function of the Brain Mitochondrial KATP Channel and Respiratory Chain Activities in Amyloid Beta Toxicity. Mol Neurobiol 2022; 59:2424-2440. [PMID: 35083663 DOI: 10.1007/s12035-021-02681-7] [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: 09/01/2021] [Accepted: 12/04/2021] [Indexed: 11/29/2022]
Abstract
It has been described that using noninvasive exposure to 40-Hz white light LED reduces amyloid-beta, a peptide thought to initiate neurotoxic events in Alzheimer's disease (AD). However, the mechanisms remain to be identified. Since AD impairs mitochondrial potassium channels and respiratory chain activity, the objectives of the current study were to determine the effect of 40-Hz white light LED on structure-function of mitoKATP channel and brain mitochondrial respiratory chain activity, production of reactive oxygen species (ROS), and ΔΨm in AD. Single mitoKATP channel was considered using a channel incorporated into the bilayer lipid membrane and expression of mitoKATP-Kir6.1 subunit as a pore-forming subunit of the channel was determined using a western blot analysis in Aβ1-42 toxicity and light-treated rats. Our results indicated a severe decrease in mito-KATP channel permeation and Kir6.1 subunit expression coming from the Aβ1-42-induced neurotoxicity. Furthermore, we found that Aβ1-42-induced neurotoxicity decreased activities of complexes I and IV and increased ROS production and ΔΨm. Surprisingly, light therapy increased channel permeation and mitoKATP-Kir6.1 subunit expression. Noninvasive 40-Hz white light LED treatment also increased activities of complexes I and IV and decreased ROS production and ΔΨm up to ~ 70%. Here, we report that brain mito-KATP channel and respiratory chain are, at least in part, novel targets of 40-Hz white light LED therapy in AD.
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Affiliation(s)
- Maryam Nazari
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Physiology, Medical School, Shahid Beheshti University of Medical Sciences, 1985717443, Evin, Tehran, Iran
| | - Taha Vajed-Samiei
- School of Electrical and Computer Engineering, Tehran University, Tehran, Iran
| | - Nihad Torabi
- Department of Physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Javad Fahanik-Babaei
- Electrophysiology Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Saghiri
- Department of Biochemistry, Pasteur Institute of Iran, Tehran, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
| | - Afsaneh Eliassi
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran. .,Department of Physiology, Medical School, Shahid Beheshti University of Medical Sciences, 1985717443, Evin, Tehran, Iran.
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6
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Pinna A, Colasanti A. The Neurometabolic Basis of Mood Instability: The Parvalbumin Interneuron Link-A Systematic Review and Meta-Analysis. Front Pharmacol 2021; 12:689473. [PMID: 34616292 PMCID: PMC8488267 DOI: 10.3389/fphar.2021.689473] [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: 03/31/2021] [Accepted: 08/18/2021] [Indexed: 12/23/2022] Open
Abstract
The neurobiological bases of mood instability are poorly understood. Neuronal network alterations and neurometabolic abnormalities have been implicated in the pathophysiology of mood and anxiety conditions associated with mood instability and hence are candidate mechanisms underlying its neurobiology. Fast-spiking parvalbumin GABAergic interneurons modulate the activity of principal excitatory neurons through their inhibitory action determining precise neuronal excitation balance. These interneurons are directly involved in generating neuronal networks activities responsible for sustaining higher cerebral functions and are especially vulnerable to metabolic stress associated with deficiency of energy substrates or mitochondrial dysfunction. Parvalbumin interneurons are therefore candidate key players involved in mechanisms underlying the pathogenesis of brain disorders associated with both neuronal networks' dysfunction and brain metabolism dysregulation. To provide empirical support to this hypothesis, we hereby report meta-analytical evidence of parvalbumin interneurons loss or dysfunction in the brain of patients with Bipolar Affective Disorder (BPAD), a condition primarily characterized by mood instability for which the pathophysiological role of mitochondrial dysfunction has recently emerged as critically important. We then present a comprehensive review of evidence from the literature illustrating the bidirectional relationship between deficiency in mitochondrial-dependent energy production and parvalbumin interneuron abnormalities. We propose a mechanistic explanation of how alterations in neuronal excitability, resulting from parvalbumin interneurons loss or dysfunction, might manifest clinically as mood instability, a poorly understood clinical phenotype typical of the most severe forms of affective disorders. The evidence we report provides insights on the broader therapeutic potential of pharmacologically targeting parvalbumin interneurons in psychiatric and neurological conditions characterized by both neurometabolic and neuroexcitability abnormalities.
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Affiliation(s)
- Antonello Pinna
- School of Life Sciences, University of Sussex, Brighton, United Kingdom.,Department of Neuroscience, Brighton and Sussex Medical School, University of Sussex, Brighton, United Kingdom
| | - Alessandro Colasanti
- Department of Neuroscience, Brighton and Sussex Medical School, University of Sussex, Brighton, United Kingdom
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7
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Wang J, Gao X, Wang Y, Wang M, Ge C, Liu Z, Xie XE, Chen Z, Song J, Lu C. The physiological modulation by intracellular kinases of hippocampal γ-oscillation in vitro. Am J Physiol Cell Physiol 2020; 318:C879-C888. [PMID: 32023074 DOI: 10.1152/ajpcell.00199.2019] [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] [Indexed: 01/16/2023]
Abstract
Hippocampal network oscillations at gamma frequency band (γ-oscillation, 20-80 Hz) are synchronized synaptic activities generated by the interactions between the excitatory and inhibitory interneurons and are associated with higher brain function such as learning and memory. Despite extensive studies about the modulation of intracellular kinases on synaptic transmission and plasticity, little is known about the effects of these kinases on γ-oscillations. In this study, we examined the effects of several critical intracellular kinases such as cyclic AMP-dependent protein kinase (PKA), protein kinase B (PKB)/Akt, protein kinase C (PKC), extracellular-regulated protein kinases (ERK) and AMP-activated protein kinase (AMPK), known to regulate synaptic transmission, on hippocampal γ-oscillations in vitro. We found that AMPK inhibitor but not PKA, PKC, or ERK inhibitor, strongly enhanced the power of γ-oscillation (γ-power) and that Akt inhibitor weakly increased γ-power. Western blot analysis confirmed that AMPK inhibitor reduced the expression of p-AMPK but not total AMPK. By using the slice whole cell voltage-clamp technique, we found that AMPK inhibitor increased the frequency but not amplitude of spontaneous inhibitory postsynaptic currents (sIPSC) and had no effect on either frequency or amplitude of spontaneous excitatory postsynaptic currents (sEPSC). Therefore, AMPK activation negatively modulates hippocampal γ-oscillation via modulation of the inhibitory neurons.
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Affiliation(s)
- JianGang Wang
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China.,Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China.,Henan Key Laboratory of Neurorestoratology, The first Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, People's Republic of China.,The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, People's Republic of China
| | - XiaHuan Gao
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China.,Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
| | - YaLi Wang
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China
| | - MengMeng Wang
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China
| | - ChunBo Ge
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China
| | - ZhiHua Liu
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China
| | - Xin-E Xie
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China
| | - ZhengYue Chen
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China.,Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
| | - JingGui Song
- The Second Affiliated Hospital of Xinxiang Medical University, Henan Key Laboratory of Biological Psychiatry, Xinxiang Medical University, Xinxiang, People's Republic of China
| | - ChengBiao Lu
- International Joint Lab of Noninvasive Neural Modulation of Henan Province, Department of Neurobiology and Physiology, Xinxiang Medical University, Xinxiang, China.,Department of Pathophysiology, Xinxiang Medical University, Xinxiang, China
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8
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Li Y, Xie X, Xing H, Yuan X, Wang Y, Jin Y, Wang J, Vreugdenhil M, Zhao Y, Zhang R, Lu C. The Modulation of Gamma Oscillations by Methamphetamine in Rat Hippocampal Slices. Front Cell Neurosci 2019; 13:277. [PMID: 31281244 PMCID: PMC6598082 DOI: 10.3389/fncel.2019.00277] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 06/07/2019] [Indexed: 12/18/2022] Open
Abstract
Gamma frequency oscillations (γ, 30–100 Hz) have been suggested to underlie various cognitive and motor functions. The psychotomimetic drug methamphetamine (MA) enhances brain γ oscillations associated with changes in psychomotor state. Little is known about the cellular mechanisms of MA modulation on γ oscillations. We explored the effects of multiple intracellular kinases on MA modulation of γ induced by kainate in area CA3 of rat ventral hippocampal slices. We found that dopamine receptor type 1 and 2 (DR1 and DR2) antagonists, the serine/threonine kinase PKB/Akt inhibitor and N-methyl-D-aspartate receptor (NMDAR) antagonists prevented the enhancing effect of MA on γ oscillations, whereas none of them affected baseline γ strength. Protein kinase A, phosphoinositide 3-kinase and extracellular signal-related kinases inhibitors had no effect on MA. We propose that the DR1/DR2-Akt-NMDAR pathway plays a critical role for the MA enhancement of γ oscillations. Our study provides an new insight into the mechanisms of acute MA on MA-induced psychosis.
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Affiliation(s)
- Yanan Li
- The Second Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China
| | - Xin'e Xie
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China
| | - Hang Xing
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China.,Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, China
| | - Xiang Yuan
- The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang, China
| | - Yuan Wang
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China
| | - Yikai Jin
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China
| | - Jiangang Wang
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China
| | - Martin Vreugdenhil
- Department of Health Sciences, Birmingham City University, Birmingham, United Kingdom
| | - Ying Zhao
- Key Laboratory of Clinical Psychopharmacology, School of Pharmacy, Xinxiang Medical University, Xinxiang, China
| | - Ruiling Zhang
- The Second Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Chengbiao Lu
- The Second Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.,Key Laboratory for the Brain Research of Henan Province, Department of Physiology, Xinxiang Medical University, Xinxiang, China
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Fan X, Wheatley EG, Villeda SA. Mechanisms of Hippocampal Aging and the Potential for Rejuvenation. Annu Rev Neurosci 2017; 40:251-272. [PMID: 28441118 DOI: 10.1146/annurev-neuro-072116-031357] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The past two decades have seen remarkable progress in our understanding of the multifactorial drivers of hippocampal aging and cognitive decline. Recent findings have also raised the possibility of functional rejuvenation in the aged hippocampus. In this review, we aim to synthesize the mechanisms that drive hippocampal aging and evaluate critically the potential for rejuvenation. We discuss the functional changes in synaptic plasticity and regenerative potential of the aged hippocampus, followed by mechanisms of microglia aging, and assess the cross talk between these proaging processes. We then examine proyouth interventions that demonstrate significant promise in reversing age-related impairments in the hippocampus and, finally, attempt to look ahead toward novel therapeutics for brain aging.
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Affiliation(s)
- Xuelai Fan
- Department of Anatomy, University of California, San Francisco, California 94143; , , .,The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, California 94143
| | - Elizabeth G Wheatley
- Department of Anatomy, University of California, San Francisco, California 94143; , , .,The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, California 94143.,Developmental and Stem Cell Biology Graduate Program, University of California, San Francisco, California 94143
| | - Saul A Villeda
- Department of Anatomy, University of California, San Francisco, California 94143; , , .,The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, California 94143.,Developmental and Stem Cell Biology Graduate Program, University of California, San Francisco, California 94143
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10
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Wang J, He X, Guo F, Cheng X, Wang Y, Wang X, Feng Z, Vreugdenhil M, Lu C. Multiple Kinases Involved in the Nicotinic Modulation of Gamma Oscillations in the Rat Hippocampal CA3 Area. Front Cell Neurosci 2017; 11:57. [PMID: 28321180 PMCID: PMC5337687 DOI: 10.3389/fncel.2017.00057] [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: 09/07/2016] [Accepted: 02/15/2017] [Indexed: 11/29/2022] Open
Abstract
Neuronal synchronization at gamma band frequency (20–80 Hz, γ oscillations) is closely associated with higher brain function, such as learning, memory and attention. Nicotinic acetylcholine receptors (nAChRs) are highly expressed in the hippocampus, and modulate hippocampal γ oscillations, but the intracellular mechanism underlying such modulation remains elusive. We explored multiple kinases by which nicotine can modulate γ oscillations induced by kainate in rat hippocampal area CA3 in vitro. We found that inhibitors of cyclic AMP dependent kinase (protein kinase A, PKA), protein kinase C (PKC), N-methyl-D-aspartate receptor (NMDA) receptors, Phosphoinositide 3-kinase (PI3K) and extracellular signal-related kinases (ERK), each individually could prevent the γ oscillation-enhancing effect of 1 μM nicotine, whereas none of them affected baseline γ oscillation strength. Inhibition of the serine/threonine kinase Akt increased baseline γ oscillations and partially blocked its nicotinic enhancement. We propose that the PKA-NMDAR-PI3K-ERK pathway modifies cellular properties required for the nicotinic enhancement of γ oscillations, dependent on a PKC-ERK mediated pathway. These signaling pathways provide clues for restoring γ oscillations in pathological conditions affecting cognition. The suppression of γ oscillations at 100 μM nicotine was only dependent on PKA-NMDAR activation and may be due to very high intracellular calcium levels.
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Affiliation(s)
- JianGang Wang
- Key Laboratory for the Brain Research of Henan Province, Xinxiang Medical UniversityXinxinang, China; Department of Pathophysiology, Xinxiang Medical UniversityXinxinang, China
| | - XiaoLong He
- Key Laboratory of Neuronal Oscillation and Disease, Yantze University Medical School JingZhou, China
| | - Fangli Guo
- Key Laboratory for the Brain Research of Henan Province, Xinxiang Medical UniversityXinxinang, China; Department of Neurobiology and Physiology, Xinxiang Medical UniversityXinxinang, China
| | - XiangLin Cheng
- Department of Laboratory Medicine, Yantze University Affiliated Hospital JingZhou, China
| | - Yali Wang
- Key Laboratory for the Brain Research of Henan Province, Xinxiang Medical UniversityXinxinang, China; Department of Neurobiology and Physiology, Xinxiang Medical UniversityXinxinang, China
| | - XiaoFang Wang
- Key Laboratory for the Brain Research of Henan Province, Xinxiang Medical University Xinxinang, China
| | - ZhiWei Feng
- Key Laboratory for the Brain Research of Henan Province, Xinxiang Medical University Xinxinang, China
| | - Martin Vreugdenhil
- Department of Psychology, Xinxiang Medical UniversityXinxinang, China; School of Life Sciences, Birmingham City UniversityBirmingham, UK
| | - ChengBiao Lu
- Key Laboratory for the Brain Research of Henan Province, Xinxiang Medical UniversityXinxinang, China; Key Laboratory of Neuronal Oscillation and Disease, Yantze University Medical SchoolJingZhou, China; Department of Neurobiology and Physiology, Xinxiang Medical UniversityXinxinang, China
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11
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Chan F, Lax NZ, Davies CH, Turnbull DM, Cunningham MO. Neuronal oscillations: A physiological correlate for targeting mitochondrial dysfunction in neurodegenerative diseases? Neuropharmacology 2016; 102:48-58. [DOI: 10.1016/j.neuropharm.2015.10.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 10/19/2015] [Accepted: 10/24/2015] [Indexed: 12/21/2022]
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Jessen SB, Mathiesen C, Lind BL, Lauritzen M. Interneuron Deficit Associates Attenuated Network Synchronization to Mismatch of Energy Supply and Demand in Aging Mouse Brains. Cereb Cortex 2015; 27:646-659. [DOI: 10.1093/cercor/bhv261] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Sanne Barsballe Jessen
- Department of Neuroscience and Pharmacology
- Center for Healthy Aging, University of Copenhagen, Copenhagen N 2200, Denmark
| | - Claus Mathiesen
- Department of Neuroscience and Pharmacology
- Center for Healthy Aging, University of Copenhagen, Copenhagen N 2200, Denmark
| | | | - Martin Lauritzen
- Department of Neuroscience and Pharmacology
- Center for Healthy Aging, University of Copenhagen, Copenhagen N 2200, Denmark
- Department of Clinical Neurophysiology, Glostrup Hospital, Glostrup 2600, Denmark
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Kann O. The interneuron energy hypothesis: Implications for brain disease. Neurobiol Dis 2015; 90:75-85. [PMID: 26284893 DOI: 10.1016/j.nbd.2015.08.005] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 07/22/2015] [Accepted: 08/12/2015] [Indexed: 12/12/2022] Open
Abstract
Fast-spiking, inhibitory interneurons - prototype is the parvalbumin-positive (PV+) basket cell - generate action potentials at high frequency and synchronize the activity of numerous excitatory principal neurons, such as pyramidal cells, during fast network oscillations by rhythmic inhibition. For this purpose, fast-spiking, PV+ interneurons have unique electrophysiological characteristics regarding action potential kinetics and ion conductances, which are associated with high energy expenditure. This is reflected in the neural ultrastructure by enrichment with mitochondria and cytochrome c oxidase, indicating the dependence on oxidative phosphorylation for adenosine-5'-triphosphate (ATP) generation. The high energy expenditure is most likely required for membrane ion transport in dendrites and the extensive axon arbor as well as for presynaptic release of neurotransmitter, gamma-aminobutyric acid (GABA). Fast-spiking, PV+ interneurons are central for the emergence of gamma oscillations (30-100Hz) that provide a fundamental mechanism of complex information processing during sensory perception, motor behavior and memory formation in networks of the hippocampus and the neocortex. Conversely, shortage in glucose and oxygen supply (metabolic stress) and/or excessive formation of reactive oxygen and nitrogen species (oxidative stress) may render these interneurons to be a vulnerable target. Dysfunction in fast-spiking, PV+ interneurons might set a low threshold for impairment of fast network oscillations and thus higher brain functions. This pathophysiological mechanism might be highly relevant for cerebral aging as well as various acute and chronic brain diseases, such as stroke, vascular cognitive impairment, epilepsy, Alzheimer's disease and schizophrenia.
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Affiliation(s)
- Oliver Kann
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany; Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany.
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Zhang X, Ge XY, Wang JG, Wang YL, Wang Y, Yu Y, Li PP, Lu CB. Induction of long-term oscillations in the γ frequency band by nAChR activation in rat hippocampal CA3 area. Neuroscience 2015; 301:49-60. [PMID: 26049144 DOI: 10.1016/j.neuroscience.2015.05.060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/19/2015] [Accepted: 05/22/2015] [Indexed: 01/08/2023]
Abstract
The hippocampal neuronal network oscillation at γ frequency band (γ oscillation) is generated by the precise interaction between interneurons and principle cells. γ oscillation is associated with attention, learning and memory and is impaired in the diseased conditions such as Alzheimer's disease (AD) and schizophrenia. Nicotinic acetylcholine receptor (nAChR) plays an important role in the regulation of hippocampal neurotransmission and network activity. It is not known whether nicotine modulates plasticity of network activity at γ oscillations in the hippocampus. In this study we investigated the effects of nicotine on the long-term changes of KA-induced γ oscillations. We found that hippocampal γ oscillations can be enhanced by a low concentration of nicotine (1μM), such an enhancement lasts for hours after washing out of nicotine, suggesting a form of synaptic plasticity, named as long-term oscillation at γ frequency band (LTOγ). Nicotine-induced LTOγ was mimicked by the selective α4β2 but not by α7 nAChR agonist and was involved in N-methyl-d-aspartate (NMDA) receptor activation as well as depended on excitatory and inhibitory neurotransmission. Our results indicate that nAChR activation induced plasticity in γ oscillation, which may be beneficial for the improvement of cognitive deficiency in AD and schizophrenia.
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Affiliation(s)
- X Zhang
- Key Laboratory of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - X Y Ge
- Key Laboratory of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - J G Wang
- Department of Pathophysiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - Y L Wang
- Key Laboratory of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - Y Wang
- Key Laboratory of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - Y Yu
- Department of Biomedical Engineering, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - P P Li
- Key Laboratory of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China
| | - C B Lu
- Key Laboratory of Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, Henan, PR China.
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Highly energized inhibitory interneurons are a central element for information processing in cortical networks. J Cereb Blood Flow Metab 2014; 34:1270-82. [PMID: 24896567 PMCID: PMC4126088 DOI: 10.1038/jcbfm.2014.104] [Citation(s) in RCA: 179] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/09/2014] [Accepted: 05/21/2014] [Indexed: 01/09/2023]
Abstract
Gamma oscillations (∼30 to 100 Hz) provide a fundamental mechanism of information processing during sensory perception, motor behavior, and memory formation by coordination of neuronal activity in networks of the hippocampus and neocortex. We review the cellular mechanisms of gamma oscillations about the underlying neuroenergetics, i.e., high oxygen consumption rate and exquisite sensitivity to metabolic stress during hypoxia or poisoning of mitochondrial oxidative phosphorylation. Gamma oscillations emerge from the precise synaptic interactions of excitatory pyramidal cells and inhibitory GABAergic interneurons. In particular, specialized interneurons such as parvalbumin-positive basket cells generate action potentials at high frequency ('fast-spiking') and synchronize the activity of numerous pyramidal cells by rhythmic inhibition ('clockwork'). As prerequisites, fast-spiking interneurons have unique electrophysiological properties and particularly high energy utilization, which is reflected in the ultrastructure by enrichment with mitochondria and cytochrome c oxidase, most likely needed for extensive membrane ion transport and γ-aminobutyric acid metabolism. This supports the hypothesis that highly energized fast-spiking interneurons are a central element for cortical information processing and may be critical for cognitive decline when energy supply becomes limited ('interneuron energy hypothesis'). As a clinical perspective, we discuss the functional consequences of metabolic and oxidative stress in fast-spiking interneurons in aging, ischemia, Alzheimer's disease, and schizophrenia.
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