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Zhuang D, Yu N, Han S, Zhang X, Ju C. The Kv7 channel opener Retigabine reduces neuropathology and alleviates behavioral deficits in APP/PS1 transgenic mice. Behav Brain Res 2024; 471:115137. [PMID: 38971432 DOI: 10.1016/j.bbr.2024.115137] [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: 03/22/2024] [Revised: 06/19/2024] [Accepted: 07/01/2024] [Indexed: 07/08/2024]
Abstract
Hyperexcitability of neuronal networks is central to the pathogenesis of Alzheimer's disease (AD). Pharmacological activation of Kv7 channels is an effective way to reduce neuronal firing. Our results showed that that pharmacologically activating the Kv7 channel with Retigabine (RTG) can alleviate cognitive impairment in mice without affecting spontaneous activity. RTG could also ameliorate damage to the Nissl bodies in cortex and hippocampal CA and DG regions in 9-month-old APP/PS1 mice. Additionally, RTG could reduce the Aβ plaque number in the hippocampus and cortex of both 6-month-old and 9-month-old mice. By recordings of electroencephalogram, we showed that a decrease in the number of abnormal discharges in the brains of the AD model mice when the Kv7 channel was opened. Moreover, Western blot analysis revealed a reduction in the expression of the p-Tau protein in both the hippocampus and cortex upon Kv7 channel opening. These findings suggest that Kv7 channel opener RTG may ameliorate cognitive impairment in AD, most likely by reducing brain excitability.
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Affiliation(s)
- Dongpei Zhuang
- Department of Pharmacology, School of Pharmacy, Qingdao University Qingdao Medical College, China.
| | - Nan Yu
- Department of Pharmacy, Qingdao Eighth People's Hospital, China.
| | - Shuo Han
- Department of Pharmacology, School of Pharmacy, Qingdao University Qingdao Medical College, China.
| | - Xinyao Zhang
- Department of Pharmacology, School of Pharmacy, Qingdao University Qingdao Medical College, China.
| | - Chuanxia Ju
- Department of Pharmacology, School of Pharmacy, Qingdao University Qingdao Medical College, China.
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Shigapova RR, Mukhamedshina YO. Electrophysiology Methods for Assessing of Neurodegenerative and Post-Traumatic Processes as Applied to Translational Research. Life (Basel) 2024; 14:737. [PMID: 38929721 PMCID: PMC11205106 DOI: 10.3390/life14060737] [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: 03/27/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024] Open
Abstract
Electrophysiological studies have long established themselves as reliable methods for assessing the functional state of the brain and spinal cord, the degree of neurodegeneration, and evaluating the effectiveness of therapy. In addition, they can be used to diagnose, predict functional outcomes, and test the effectiveness of therapeutic and rehabilitation programs not only in clinical settings, but also at the preclinical level. Considering the urgent need to develop potential stimulators of neuroregeneration, it seems relevant to obtain objective data when modeling neurological diseases in animals. Thus, in the context of the application of electrophysiological methods, not only the comparison of the basic characteristics of bioelectrical activity of the brain and spinal cord in humans and animals, but also their changes against the background of neurodegenerative and post-traumatic processes are of particular importance. In light of the above, this review will contribute to a better understanding of the results of electrophysiological assessment in neurodegenerative and post-traumatic processes as well as the possibility of translating these methods from model animals to humans.
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Affiliation(s)
- Rezeda Ramilovna Shigapova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan 420008, Russia;
| | - Yana Olegovna Mukhamedshina
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan 420008, Russia;
- Department of Histology, Cytology and Embryology, Kazan State Medical University, Kazan 420012, Russia
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Yuan D, Zhou Z, Song M, Zhang Y, Zhang Y, Ren P, Chen Z, Fu Y. Role of GABA B receptors in cognition and EEG activity in aged APP and PS1 transgenic mice. Neurochem Int 2024; 175:105718. [PMID: 38490487 DOI: 10.1016/j.neuint.2024.105718] [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: 04/24/2023] [Revised: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 03/17/2024]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia in the elderly. Recent evidence suggests that gamma-aminobutyric acid B (GABAB) receptor-mediated inhibition is a major contributor to AD pathobiology, and GABAB receptors have been hypothesized to be a potential target for AD treatment. The aim of this study is to determine how GABAB regulation alters cognitive function and brain activity in an AD mouse model. Early, middle and late stage (8-23 months) amyloid precursor protein (APP) and presenilin 1 (PS1) transgenic mice were used for the study. The GABAB agonist baclofen (1 and 2.5 mg/kg, i. p.) and the antagonist phaclofen (0.5 mg/kg, i. p.) were used. Primarily, we found that GABAB activation was able to improve spatial and/or working memory performance in early and late stage AD animals. In addition, GABAB activation and inhibition could regulate global and local EEG oscillations in AD animals, with activation mainly regulating low-frequency activity (delta-theta bands) and inhibition mainly regulating mid- and high-frequency activity (alpha-gamma bands), although the regulated magnitude at some frequencies was reduced in AD. The cognitive improvements in AD animals may be explained by the reduced EEG activity in the theta frequency band (2-4 Hz). This study provides evidence for a potential therapeutic effect of baclofen in the elderly AD brain and for GABAB receptor-mediated inhibition as a potential therapeutic target for AD.
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Affiliation(s)
- Dong Yuan
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China
| | - Zheng Zhou
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China
| | - Meihui Song
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China
| | - Yunfan Zhang
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China
| | - Yunbin Zhang
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China
| | - Ping Ren
- Department of Geriatric Psychiatry, Shenzhen Mental Health Center, Shenzhen Kangning Hospital, Shenzhen, Guangdong, 518020, China
| | - Zhuangfei Chen
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China
| | - Yu Fu
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan, 650500, China.
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Zhang Y, Zhang Y, Chen Z, Ren P, Fu Y. Continuous high-frequency repetitive transcranial magnetic stimulation at extremely low intensity affects exploratory behavior and spatial cognition in mice. Behav Brain Res 2024; 458:114739. [PMID: 37926334 DOI: 10.1016/j.bbr.2023.114739] [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: 07/20/2023] [Revised: 10/13/2023] [Accepted: 11/01/2023] [Indexed: 11/07/2023]
Abstract
High-frequency repetitive transcranial magnetic stimulation (HF-rTMS) has been shown to be effective for cognitive intervention. However, whether HF-rTMS with extremely low intensity could influence cognitive functions is still under investigation. The present study systematically investigated the effects of continuous 40 Hz and 10 Hz rTMS on cognition in young adult mice at extremely low intensity (10 mT and 1 mT) for 11 days (30 min/day). Cognitive functions were assessed using diverse behavioral tasks, including the open field, Y-maze, and Barnes maze paradigms. We found that 40 Hz rTMS significantly impaired exploratory behavior and spatial memory in both 10 mT and 1 mT conditions. In addition, 40 Hz rTMS induced remarkably different effects on exploratory behavior between 10 mT and 1mT, compared to 10 Hz stimulation. Our results indicate that extremely low intensity rTMS can significantly alter cognitive performance depending on intensity and frequency, shedding light on the understanding of the mechanism of rTMS effects.
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Affiliation(s)
- Yunfan Zhang
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan 650500, China
| | - Yunbin Zhang
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan 650500, China
| | - Zhuangfei Chen
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan 650500, China
| | - Ping Ren
- Department of Geriatric Psychiatry, Shenzhen Mental Health Center / Shenzhen Kangning Hospital, Shenzhen, Guangdong 518020, China.
| | - Yu Fu
- Medical School, Kunming University of Science & Technology, Kunming, Yunnan 650500, China.
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Palimariciuc M, Oprea DC, Cristofor AC, Florea T, Dobrin RP, Dobrin I, Gireadă B, Gavril R, Mawas I, Bejenariu AC, Knieling A, Ciobica A, Chiriță R. The Effects of Transcranial Direct Current Stimulation in Patients with Mild Cognitive Impairment. Neurol Int 2023; 15:1423-1442. [PMID: 38132971 PMCID: PMC10745513 DOI: 10.3390/neurolint15040092] [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: 09/25/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
Transcranial direct current stimulation (tDCS) came into consideration in recent years as a promising, non-invasive form of neuromodulation for individuals suffering from mild cognitive impairment (MCI). MCI represents a transitional stage between normal cognitive aging and more severe cognitive decline, which appears in neurodegenerative diseases, such as Alzheimer's disease. Numerous studies have shown that tDCS can have several useful effects in patients with MCI. It is believed to enhance cognitive functions, including memory and attention, potentially slowing down the progression of neurodegeneration and cognitive decline. tDCS is believed to work by modulating neuronal activity and promoting synaptic plasticity in the brain regions associated with cognition. Moreover, tDCS is generally considered safe and well-tolerated, making it an attractive option for long-term therapeutic use in MCI. However, further research is needed to determine the optimal stimulation parameters and long-term effects of tDCS in this population, as well as its potential to serve as a complementary therapy alongside other interventions for MCI. In this review, we included 16 randomized clinical trials containing patients with MCI who were treated with tDCS. We aim to provide important evidence for the cognitive enhancement using tDCS in patients with MCI, summarizing the effects and conclusions found in several clinical trials, and discuss its main mechanisms.
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Affiliation(s)
- Matei Palimariciuc
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Dan Cătălin Oprea
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Ana Caterina Cristofor
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Tudor Florea
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Romeo Petru Dobrin
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Irina Dobrin
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Bogdan Gireadă
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Radu Gavril
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Iasmin Mawas
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
| | - Andreea Cristina Bejenariu
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
| | - Anton Knieling
- Institute of Forensic Medicine, 700455 Iași, Romania;
- Forensic Science Department, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania
| | - Alin Ciobica
- Department of Biology, Faculty of Biology, Alexandru Ioan Cuza University, B-dul Carol I No. 11, 700506 Iasi, Romania;
- Academy of Romanian Scientists, Splaiul Independentei Nr. 54, Sector 5, 050094 Bucuresti, Romania
- Centre of Biomedical Research, Romanian Academy, B-dul Carol I No. 8, 700506 Iasi, Romania
- Preclinical Department, Apollonia University, Păcurari Street 11, 700511 Iași, Romania
| | - Roxana Chiriță
- Department of Medicine III, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 700115 Iasi, Romania; (M.P.); (D.C.O.); (A.C.C.); (T.F.); (I.D.); (B.G.); (R.G.); (I.M.); (A.C.B.); (R.C.)
- Institute of Psychiatry “Socola”, 36 Bucium Street, 700282 Iasi, Romania
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Liu Y, Liu S, Tang C, Tang K, Liu D, Chen M, Mao Z, Xia X. Transcranial alternating current stimulation combined with sound stimulation improves cognitive function in patients with Alzheimer's disease: Study protocol for a randomized controlled trial. Front Aging Neurosci 2023; 14:1068175. [PMID: 36698862 PMCID: PMC9869764 DOI: 10.3389/fnagi.2022.1068175] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 12/14/2022] [Indexed: 01/12/2023] Open
Abstract
Background The number of patients with Alzheimer's disease (AD) worldwide is increasing yearly, but the existing treatment methods have poor efficacy. Transcranial alternating current stimulation (tACS) is a new treatment for AD, but the offline effect of tACS is insufficient. To prolong the offline effect, we designed to combine tACS with sound stimulation to maintain the long-term post-effect. Materials and methods To explore the safety and effectiveness of tACS combined with sound stimulation and its impact on the cognition of AD patients. This trial will recruit 87 patients with mild to moderate AD. All patients were randomly divided into three groups. The change in Alzheimer's Disease Assessment Scale-Cognitive (ADAS-Cog) scores from the day before treatment to the end of treatment and 3 months after treatment was used as the main evaluation index. We will also explore the changes in the brain structural network, functional network, and metabolic network of AD patients in each group after treatment. Discussion We hope to conclude that tACS combined with sound stimulation is safe and tolerable in 87 patients with mild to moderate AD under three standardized treatment regimens. Compared with tACS alone or sound alone, the combination group had a significant long-term effect on cognitive improvement. To screen out a better treatment plan for AD patients. tACS combined with sound stimulation is a previously unexplored, non-invasive joint intervention to improve patients' cognitive status. This study may also identify the potential mechanism of tACS combined with sound stimulation in treating mild to moderate AD patients. Clinical Trial Registration Clinicaltrials.gov, NCT05251649. Registered on February 22, 2022.
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Affiliation(s)
- Yang Liu
- Department of Neurosurgery, Affiliated Hospital of Guilin Medical University, Guilin, China
| | | | - Can Tang
- Department of Neurosurgery, Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Keke Tang
- Guangzhou Kangzhi Digital Technology Co., Ltd., Guangzhou, China
| | - Di Liu
- Guangzhou Kangzhi Digital Technology Co., Ltd., Guangzhou, China
| | - Meilian Chen
- Guangzhou Kangzhi Digital Technology Co., Ltd., Guangzhou, China
| | - Zhiqi Mao
- Department of Neurosurgery, Chinese PLA General Hospital, Beijing, China,*Correspondence: Zhiqi Mao, ; Xuewei Xia,
| | - Xuewei Xia
- Department of Neurosurgery, Affiliated Hospital of Guilin Medical University, Guilin, China,*Correspondence: Zhiqi Mao, ; Xuewei Xia,
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Bok J, Ha J, Ahn BJ, Jang Y. Disease-Modifying Effects of Non-Invasive Electroceuticals on β-Amyloid Plaques and Tau Tangles for Alzheimer's Disease. Int J Mol Sci 2022; 24:ijms24010679. [PMID: 36614120 PMCID: PMC9821138 DOI: 10.3390/ijms24010679] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/04/2023] Open
Abstract
Electroceuticals refer to various forms of electronic neurostimulators used for therapy. Interdisciplinary advances in medical engineering and science have led to the development of the electroceutical approach, which involves therapeutic agents that specifically target neural circuits, to realize precision therapy for Alzheimer's disease (AD). To date, extensive studies have attempted to elucidate the disease-modifying effects of electroceuticals on areas in the brain of a patient with AD by the use of various physical stimuli, including electric, magnetic, and electromagnetic waves as well as ultrasound. Herein, we review non-invasive stimulatory systems and their effects on β-amyloid plaques and tau tangles, which are pathological molecular markers of AD. Therefore, this review will aid in better understanding the recent technological developments, applicable methods, and therapeutic effects of electronic stimulatory systems, including transcranial direct current stimulation, 40-Hz gamma oscillations, transcranial magnetic stimulation, electromagnetic field stimulation, infrared light stimulation and ionizing radiation therapy, and focused ultrasound for AD.
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Affiliation(s)
- Junsoo Bok
- Department of Medical and Digital Engineering, College of Engineering, Hanyang University, Seoul 04736, Republic of Korea
| | - Juchan Ha
- Department of Biomedical Engineering, College of Engineering, Hanyang University, Seoul 04736, Republic of Korea
| | - Bum Ju Ahn
- Department of Pharmacology, College of Medicine, Hanyang University, Seoul 04736, Republic of Korea
| | - Yongwoo Jang
- Department of Medical and Digital Engineering, College of Engineering, Hanyang University, Seoul 04736, Republic of Korea
- Department of Pharmacology, College of Medicine, Hanyang University, Seoul 04736, Republic of Korea
- Correspondence: ; Tel.: +82-2-2220-0655
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