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Hidisoglu E, Chiantia G. Frontal EEG alterations induced by hippocampal amyloid pathology in rats. Adv Med Sci 2023; 68:353-358. [PMID: 37757662 DOI: 10.1016/j.advms.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
PURPOSE In this study, it was aimed to determine the dose-dependent effects of hippocampal amyloid beta (Aβ) on frontal EEG activity and to elucidate the possible non-invasive biomarkers by recording spontaneous EEG in free-moving rats. MATERIAL AND METHODS Male albino Wistar rats aged 3 months were randomly divided into 4 groups (n = 8 for each group), obtained by intrahippocampal injection of saline or different doses of Aβ1-42 i.e. 0.01 μg/μl, 0.1 μg/μl, and 1 μg/μl. After two weeks of recovery period, spontaneous EEG recordings were obtained from frontal regions and spectral power analyses were performed. RESULTS We detected a general slowdown in the brain activity two weeks after Aβ1-42 injection. We observed significant increases in frontal alpha power (p = 0.0021) and significant decreases in frontal beta power (p = 0.0003) between the Sh and Aβ1-42-injected groups. More specifically, the ratio of the frontal EEG beta and alpha power (rFBA) was significantly affected by the intrahippocampal injection of Aβ1-42 (p < 0.0001). Also, we observed that rFBA was negatively and strongly correlated with hippocampal Aβ1-42 peptide levels (r = -0.781, p < 0.0001). CONCLUSION Our findings indicate that spontaneous frontal EEG beta and alpha activity were significantly affected by the intrahippocampal injection of Aβ1-42. However, the results suggest that the power ratios of these bands are more sensitive to the hippocampal amyloid pathology. As such, it is proposed that the rFBA may be a more effective biomarker for diagnosing hippocampal pathology induced by Aβ1-42.
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Affiliation(s)
- Enis Hidisoglu
- Department of Drug Science and Technology, University of Turin, Turin, Italy; Akdeniz University Faculty of Medicine Department of Biophysics, Antalya, Turkey.
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Chiantia G, Hidisoglu E, Marcantoni A. The Role of Ryanodine Receptors in Regulating Neuronal Activity and Its Connection to the Development of Alzheimer's Disease. Cells 2023; 12:cells12091236. [PMID: 37174636 PMCID: PMC10177020 DOI: 10.3390/cells12091236] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/19/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023] Open
Abstract
Research into the early impacts of Alzheimer's disease (AD) on synapse function is one of the most promising approaches to finding a treatment. In this context, we have recently demonstrated that the Abeta42 peptide, which builds up in the brain during the processing of the amyloid precursor protein (APP), targets the ryanodine receptors (RyRs) of mouse hippocampal neurons and potentiates calcium (Ca2+) release from the endoplasmic reticulum (ER). The uncontrolled increase in intracellular calcium concentration ([Ca2+]i), leading to the development of Ca2+ dysregulation events and related excitable and synaptic dysfunctions, is a consolidated hallmark of AD onset and possibly other neurodegenerative diseases. Since RyRs contribute to increasing [Ca2+]i and are thought to be a promising target for AD treatment, the goal of this review is to summarize the current level of knowledge regarding the involvement of RyRs in governing neuronal function both in physiological conditions and during the onset of AD.
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Affiliation(s)
| | - Enis Hidisoglu
- Department of Drug and Science Technology, University of Torino, Corso Raffaello 30, 10125 Torino, Italy
| | - Andrea Marcantoni
- Department of Drug and Science Technology, University of Torino, Corso Raffaello 30, 10125 Torino, Italy
- N.I.S. Center, University of Torino, 10125 Turin, Italy
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Hidisoglu E, Chiantia G, Franchino C, Tomagra G, Giustetto M, Carbone E, Carabelli V, Marcantoni A. The ryanodine receptor-calstabin interaction stabilizer S107 protects hippocampal neurons from GABAergic synaptic alterations induced by Abeta42 oligomers. J Physiol 2022; 600:5295-5309. [PMID: 36284365 DOI: 10.1113/jp283537] [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: 07/04/2022] [Accepted: 10/12/2022] [Indexed: 01/05/2023] Open
Abstract
The oligomeric form of the peptide amyloid beta 42 (Abeta42) contributes to the development of synaptic abnormalities and cognitive impairments associated with Alzheimer's disease (AD). To date, there is a gap in knowledge regarding how Abeta42 alters the elementary parameters of GABAergic synaptic function. Here we found that Abeta42 increased the frequency and amplitude of miniature GABAergic currents as well as the amplitude of evoked inhibitory postsynaptic currents. When we focused on paired pulse depression (PPD) to establish whether GABA release probability was affected by Abeta42, we did not observe any significant change. On the other hand, a more detailed investigation of the presynaptic effects induced by Abeta42 by means of multiple probability fluctuation analysis and cumulative amplitude analysis showed an increase in both the size of the readily releasable pool responsible for synchronous release and the number of release sites. We further explored whether ryanodine receptors (RyRs) contributed to exacerbating these changes by stabilizing the interaction between RyRs and the accessory protein calstabin. We observed that the RyR-calstabin interaction stabilizer S107 restored the synaptic parameters to values comparable to those measured in control conditions. In conclusion, our results clarify the mechanisms of potentiation of GABAergic synapses induced by Abeta42. We further suggest that RyRs are involved in the control of synaptic activity during the early stage of AD onset and that their stabilization could represent a new therapeutical approach for AD treatment. KEY POINTS: Accumulation of the peptide amyloid beta 42 (Abeta42) is a key characteristic of Alzheimer's disease (AD) and causes synaptic dysfunctions. To date, the effects of Abeta42 accumulation on GABAergic synapses are poorly understood. The findings reported here suggest that, similarly to what is observed on glutamatergic synapses, Abeta42 modifies GABAergic synapses by targeting ryanodine receptors and causing calcium dysregulation. The GABAergic impairments can be restored by the ryanodine receptor-calstabin interaction stabilizer S107. Based on this research, RyRs stabilization may represent a novel pharmaceutical strategy for preventing or delaying AD.
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Affiliation(s)
- Enis Hidisoglu
- Department of Drug Science and Technology, NIS Centre, University of Turin, Turin, Italy
| | | | - Claudio Franchino
- Department of Drug Science and Technology, NIS Centre, University of Turin, Turin, Italy
| | - Giulia Tomagra
- Department of Drug Science and Technology, NIS Centre, University of Turin, Turin, Italy
| | | | - Emilio Carbone
- Department of Drug Science and Technology, NIS Centre, University of Turin, Turin, Italy
| | - Valentina Carabelli
- Department of Drug Science and Technology, NIS Centre, University of Turin, Turin, Italy
| | - Andrea Marcantoni
- Department of Drug Science and Technology, NIS Centre, University of Turin, Turin, Italy
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Hidisoglu E, Kantar D, Ozdemir S, Yargicoglu P. Cognitive dysfunctions and spontaneous EEG alterations induced by hippocampal amyloid pathology in rats. Adv Med Sci 2022; 67:328-337. [PMID: 36058175 DOI: 10.1016/j.advms.2022.08.003] [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: 03/19/2022] [Revised: 06/13/2022] [Accepted: 08/17/2022] [Indexed: 11/26/2022]
Abstract
PURPOSE We aimed to determine the effects of different doses of amyloid-beta (Aβ) peptide on learning and memory, and whether the changes in brain oscillations induced by dose-dependent accumulation of Aβ could be used as biomarkers to detect early stages of Alzheimer's disease (AD). MATERIAL AND METHODS Male albino Wistar rats aged 3 months were randomly divided into four groups (n = 12/group) obtained by i. h. Injection (to the dorsal hippocampus) of saline or different doses of 0.01 μg/μl, 0.1 μg/μl, and 1 μg/μl of Aβ. After two weeks of recovery period, open field and novel object recognition tests were performed and spontaneous EEG recordings were obtained. Later, hippocampus tissues were collected for Western blot and ELISA analysis. RESULTS A significant decrement in recognition memory was observed in 0.1 μg/μl, and 1 μg/μl injected groups. In addition, Aβ accumulation induced significant decrement of the expression of NeuN, SNAP-25, SYP, and PSD-95 proteins, and led to the increment of GFAP expression in hippocampus. Moreover, we detected remarkable alterations in spontaneous brain activity. The hippocampal Aβ levels were negatively correlated with hippocampal gamma power and positively correlated with hippocampal theta power. Also, we observed significant changes in coherence values, indicating the functional connectivity between different brain regions, after the accumulation of Aβ. Especially, there was a significant correlation between changes in frontohippocampal theta coherence and in frontotemporal theta coherence. CONCLUSIONS Our findings indicate that Aβ peptide induces AD-like molecular changes at certain doses, and these changes could be detected by evaluating brain oscillations.
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Affiliation(s)
- Enis Hidisoglu
- Department of Drug Science and Technology, Turin University, Corso Raffaello 30, 10125, Torino, Italy; Akdeniz University Faculty of Medicine Department of Biophysics, Antalya, Turkey.
| | - Deniz Kantar
- Akdeniz University Faculty of Medicine Department of Biophysics, Antalya, Turkey
| | - Semir Ozdemir
- Akdeniz University Faculty of Medicine Department of Biophysics, Antalya, Turkey
| | - Piraye Yargicoglu
- Akdeniz University Faculty of Medicine Department of Biophysics, Antalya, Turkey
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Duan M, Meng Z, Yuan D, Zhang Y, Tang T, Chen Z, Fu Y. Anodal and cathodal transcranial direct current stimulations of prefrontal cortex in a rodent model of Alzheimer’s disease. Front Aging Neurosci 2022; 14:968451. [PMID: 36081893 PMCID: PMC9446483 DOI: 10.3389/fnagi.2022.968451] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/02/2022] [Indexed: 11/13/2022] Open
Abstract
Alzheimer’s disease (AD) is a leading cause of dementia in the elderly, with no effective treatment currently available. Transcranial direct current stimulation (tDCS), a non-drug and non-invasive therapy, has been testified efficient in cognitive enhancement. This study aims to examine the effects of tDCS on brain function in a mouse model of AD. The amyloid precursor protein (APP) and presenilin 1 (PS1) transgenic mice (7–8 months old) were subjected to 20-min anodal and cathodal tDCS (atDCS and ctDCS; 300 μA, 3.12 mA/cm2) for continuous five days. tDCS was applied on the left frontal skull of the animals, targeting on their prefrontal cortex (PFC). Behavioral performances were assessed by open-field, Y-maze, Barnes maze and T-maze paradigms; and their PFC electroencephalogram (EEG) activities were recorded under spontaneous state and during Y-maze performance. Behaviorally, atDCS and ctDCS improved spatial learning and/or memory in AD mice without affecting their general locomotion and anxiety-like behaviors, but the effects depended on the testing paradigms. Interestingly, the memory improvements were accompanied by decreased PFC EEG delta (2–4 Hz) and increased EEG gamma (20–100 Hz) activities when the animals needed memory retrieval during task performance. The decreased EEG delta activities could also be observed in animals under spontaneous state. Specifically, atDCS increased PFC EEG activity in the alpha band (8–12 Hz) for spontaneous state, whereas ctDCS increased that in alpha-beta band (8–20 Hz) for task-related state. In addition, some EEG changes after ctDCS could be found in other cortical regions except PFC. These data indicate that tDCS can reverse the situation of slower brain activity in AD mice, which may further lead to cognitive improvement. Our work highlights the potential clinical use of tDCS to restore neural network activity and improve cognition in AD.
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Affiliation(s)
- Mengsi Duan
- Medical School, Kunming University of Science & Technology, Kunming, China
| | - Zhiqiang Meng
- Shenzhen Key Laboratory of Drug Addiction, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- CAS Key Laboratory of Brain Connectome and Manipulation, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, China
| | - Dong Yuan
- Medical School, Kunming University of Science & Technology, Kunming, China
| | - Yunfan Zhang
- Medical School, Kunming University of Science & Technology, Kunming, China
| | - Tao Tang
- Medical School, Kunming University of Science & Technology, Kunming, China
| | - Zhuangfei Chen
- Medical School, Kunming University of Science & Technology, Kunming, China
| | - Yu Fu
- Medical School, Kunming University of Science & Technology, Kunming, China
- *Correspondence: Yu Fu,
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Akgül B, Aycan İÖ, Hidişoğlu E, Afşar E, Yıldırım S, Tanrıöver G, Coşkunfırat N, Sanlı S, Aslan M. Alleviation of prilocaine-induced epileptiform activity and cardiotoxicity by thymoquinone. Daru 2021; 29:85-99. [PMID: 33469802 PMCID: PMC8149770 DOI: 10.1007/s40199-020-00385-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 12/29/2020] [Indexed: 02/02/2023] Open
Abstract
PURPOSE This study investigated whether thymoquinone (TQ) could alleviate central nervous system (CNS) and cardiovascular toxicity of prilocaine, a commonly used local anesthetic. METHODS Rats were randomized to the following groups: control, prilocaine treated, TQ treated and prilocaine + TQ treated. Electroencephalography and electrocardiography electrodes were placed and trachea was intubated. Mechanical ventilation was initiated, right femoral artery was cannulated for continuous blood pressure measurements and blood-gas sampling while the left femoral vein was cannulated for prilocaine infusion. Markers of myocardial injury, reactive oxygen/nitrogen species (ROS/RNS) generation and total antioxidant capacity (TAC) were assayed by standard kits. Aquaporin-4 (AQP4), nuclear factor(NF)κB-p65 and -p50 subunit in brain tissue were evaluated by histological scoring. RESULTS Blood pH and partial oxygen pressure, was significantly decreased after prilocaine infusion. The decrease in blood pH was alleviated in the prilocaine + TQ treated group. Prilocaine produced seizure activity, cardiac arrhythmia and asystole at significantly lower doses compared to prilocaine + TQ treated rats. Thymoquinone administration attenuated levels of myocardial injury induced by prilocaine. Prilocaine treatment caused increased ROS/RNS formation and decreased TAC in heart and brain tissue. Thymoquinone increased heart and brain TAC and decreased ROS/RNS formation in prilocaine treated rats. AQP4, NFκB-p65 and NFκB-p50 expressions were increased in cerebellum, cerebral cortex, choroid plexus and thalamic nucleus in prilocaine treated rats. Thymoquinone, decreased the expression of AQP4, NFκB-p65 and NFκB-p50 in brain tissue in prilocaine + TQ treated rats. CONCLUSION Results indicate that TQ could ameliorate prilocaine-induced CNS and cardiovascular toxicity.
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Affiliation(s)
- Barış Akgül
- Department of Anesthesiology and Reanimation, Akdeniz University, Antalya, Turkey
| | - İlker Öngüç Aycan
- Department of Anesthesiology and Reanimation, Akdeniz University, Antalya, Turkey
| | - Enis Hidişoğlu
- Department of Biophysics, Akdeniz University, Antalya, Turkey
| | - Ebru Afşar
- Department of Medical Biochemistry, Akdeniz University Medical School, 07070 Antalya, Turkey
| | - Sendegül Yıldırım
- Department of Histology and Embryology, Akdeniz University, Antalya, Turkey
| | - Gamze Tanrıöver
- Department of Histology and Embryology, Akdeniz University, Antalya, Turkey
| | - Nesil Coşkunfırat
- Department of Anesthesiology and Reanimation, Akdeniz University, Antalya, Turkey
| | - Suat Sanlı
- Department of Anesthesiology and Reanimation, Akdeniz University, Antalya, Turkey
| | - Mutay Aslan
- Department of Medical Biochemistry, Akdeniz University Medical School, 07070 Antalya, Turkey
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Isla AG, Balleza-Tapia H, Fisahn A. Efficacy of preclinical pharmacological interventions against alterations of neuronal network oscillations in Alzheimer's disease: A systematic review. Exp Neurol 2021; 343:113743. [PMID: 34000250 DOI: 10.1016/j.expneurol.2021.113743] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 04/13/2021] [Accepted: 05/04/2021] [Indexed: 12/29/2022]
Abstract
Despite the development of multiple pharmacological approaches over the years aimed at treating Alzheimer's Disease (AD) only very few have been approved for clinical use in patients. To date there still exists no disease-modifying treatment that could prevent or rescue the cognitive impairment, particularly of memory aquisition, that is characteristic of AD. One of the possibilities for this state of affairs might be that the majority of drug discovery efforts focuses on outcome measures of decreased neuropathological biomarkers characteristic of AD, without taking into acount neuronal processes essential to the generation and maintenance of memory processes. Particularly, the capacity of the brain to generate theta (θ) and gamma (γ) oscillatory activity has been strongly correlated to memory performance. Using a systematic review approach, we synthesize the existing evidence in the literature on pharmacological interventions that enhance neuronal theta (θ) and/or gamma (γ) oscillations in non-pathological animal models and in AD animal models. Additionally, we synthesize the main outcomes and neurochemical systems targeted. We propose that functional biomarkers such as cognition-relevant neuronal network oscillations should be used as outcome measures during the process of research and development of novel drugs against cognitive impairment in AD.
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Affiliation(s)
- Arturo G Isla
- Neuronal Oscillations Laboratory, Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Akademiska Stråket 1, J10:30, 17164 Solna, Stockholm, Sweden
| | - Hugo Balleza-Tapia
- Neuronal Oscillations Laboratory, Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Akademiska Stråket 1, J10:30, 17164 Solna, Stockholm, Sweden
| | - André Fisahn
- Neuronal Oscillations Laboratory, Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Akademiska Stråket 1, J10:30, 17164 Solna, Stockholm, Sweden.
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Hidisoglu E, Yargicoglu P. Auditory evoked potentials might have the potential to serve as early indicators related to amyloid beta peptide toxicity. Adv Med Sci 2020; 65:223-232. [PMID: 32120237 DOI: 10.1016/j.advms.2020.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/25/2019] [Accepted: 02/05/2020] [Indexed: 01/05/2023]
Abstract
PURPOSE Accumulation of amyloid beta (Aβ) is thought to be the major cause of the development and progression of Alzheimer's disease (AD). The aim of this study is to elucidate the effects of Aβ1-42 at increasing concentrations on auditory evoked potentials (AEPs) and to determine possible changes relevant to the accumulation of Aβ1-42. MATERIALS AND METHODS In this study, rats were randomized to following groups (n = 10 per group): sham (0.9% NaCl), Aβ-1 (1 μg/μl), Aβ-2 (2 μg/μl), Aβ-3 (3 μg/μl), Aβ-4 (4 μg/μl), Aβ-5 (6 μg/μl), Aβ-6 (8 μg/μl) and Aβ-7 (10 μg/μl) groups obtained by injection of 5 μl per ventricle. Then, AEPs were recorded in freely-moving rats. Latencies and amplitudes of AEPs, evoked power, inter-trial phase synchronization, and auditory evoked gamma responses were obtained in response to auditory stimulus. Furthermore, Aβ1-42 levels were determined in the temporal cortex. RESULTS Aβ1-42 levels were significantly higher in the temporal cortex in Aβ groups compared to the sham. In frontal and parietal regions, P1N1 amplitudes were significantly decreased in Aβ-3, 4, 5 and 6 groups, and N1P2 amplitudes were significantly decreased in all Aβ groups, whereas in temporal regions, P1N1 and N1P2 amplitudes were decreased in Aβ-2,3,4,5,6 and 7 compared to the sham. In the evoked gamma power and phase synchronization of gamma responses, we detected significant decrease after Aβ-4 group, whereas a significant decrease in the filtered gamma responses was observed in Aβ groups compared to the sham. CONCLUSIONS AEPs might be used as a biomarker to determine the Aβ1-42 related neuronal degeneration in the auditory networks.
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Affiliation(s)
- Enis Hidisoglu
- Department of Biophysics, Akdeniz University Faculty of Medicine, Antalya, Turkey.
| | - Piraye Yargicoglu
- Department of Biophysics, Akdeniz University Faculty of Medicine, Antalya, Turkey
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Peña-Ortega F. Brain Arrhythmias Induced by Amyloid Beta and Inflammation: Involvement in Alzheimer’s Disease and Other Inflammation-related Pathologies. Curr Alzheimer Res 2020; 16:1108-1131. [DOI: 10.2174/1567205017666191213162233] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 10/29/2019] [Accepted: 11/05/2019] [Indexed: 12/13/2022]
Abstract
A variety of neurological diseases, including Alzheimer’s disease (AD), involve amyloid beta (Aβ) accumulation and/or neuroinflammation, which can alter synaptic and neural circuit functions. Consequently, these pathological conditions induce changes in neural network rhythmic activity (brain arrhythmias), which affects many brain functions. Neural network rhythms are involved in information processing, storage and retrieval, which are essential for memory consolidation, executive functioning and sensory processing. Therefore, brain arrhythmias could have catastrophic effects on circuit function, underlying the symptoms of various neurological diseases. Moreover, brain arrhythmias can serve as biomarkers for a variety of brain diseases. The aim of this review is to provide evidence linking Aβ and inflammation to neural network dysfunction, focusing on alterations in brain rhythms and their impact on cognition and sensory processing. I reviewed the most common brain arrhythmias characterized in AD, in AD transgenic models and those induced by Aβ. In addition, I reviewed the modulations of brain rhythms in neuroinflammatory diseases and those induced by immunogens, interleukins and microglia. This review reveals that Aβ and inflammation produce a complex set of effects on neural network function, which are related to the induction of brain arrhythmias and hyperexcitability, both closely related to behavioral alterations. Understanding these brain arrhythmias can help to develop therapeutic strategies to halt or prevent these neural network alterations and treat not only the arrhythmias but also the symptoms of AD and other inflammation-related pathologies.
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Affiliation(s)
- Fernando Peña-Ortega
- Departamento de Neurobiologia del Desarrollo y Neurofisiologia, Instituto de Neurobiologia, Universidad Nacional Autonoma de Mexico, Queretaro, Qro., 76230, Mexico
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Fu Y, Li L, Wang Y, Chu G, Kong X, Wang J. Role of GABAA receptors in EEG activity and spatial recognition memory in aged APP and PS1 double transgenic mice. Neurochem Int 2019; 131:104542. [DOI: 10.1016/j.neuint.2019.104542] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 09/02/2019] [Accepted: 09/02/2019] [Indexed: 10/26/2022]
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Syed Nasser N, Ibrahim B, Sharifat H, Abdul Rashid A, Suppiah S. Incremental benefits of EEG informed fMRI in the study of disorders related to meso-corticolimbic dopamine pathway dysfunction: A systematic review of recent literature. J Clin Neurosci 2019; 65:87-99. [PMID: 30955950 DOI: 10.1016/j.jocn.2019.03.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 03/25/2019] [Indexed: 02/02/2023]
Abstract
Functional magnetic resonance imaging (fMRI) is a non-invasive imaging modality that enables the assessment of neural connectivity and oxygen utility of the brain using blood oxygen level dependent (BOLD) imaging sequence. Electroencephalography (EEG), on the other hands, looks at cortical electrical impulses of the brain thus detecting brainwave patterns during rest and thought processing. The combination of these two modalities is called fMRI with simultaneous EEG (fMRI-EEG), which has emerged as a new tool for experimental neuroscience assessments and has been applied clinically in many settings, most commonly in epilepsy cases. Recent advances in imaging has led to fMRI-EEG being utilized in behavioural studies which can help in giving an objective assessment of ambiguous cases and help in the assessment of response to treatment by providing a non-invasive biomarker of the disease processes. We aim to review the role and interpretation of fMRI-EEG in studies pertaining to psychiatric disorders and behavioral abnormalities.
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Affiliation(s)
- Nisha Syed Nasser
- Centre for Diagnostic Nuclear Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Buhari Ibrahim
- Centre for Diagnostic Nuclear Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Department of Physiology, Faculty of Basic Health Sciences, Bauchi State University, Gadau, Nigeria
| | - Hamed Sharifat
- Centre for Diagnostic Nuclear Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Aida Abdul Rashid
- Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Subapriya Suppiah
- Centre for Diagnostic Nuclear Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
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