1
|
Asadzadeh Bayqara S, Aghazadeh Yamchelu M, Abdolahzadeyadegari S, Farhadi M, Nadjafi S, Fahanik Babaei J, Hosseini N. The effects of a chalcone derivative on memory, hippocampal corticosterone and BDNF levels in adult rats. Int J Neurosci 2024; 134:214-223. [PMID: 35796038 DOI: 10.1080/00207454.2022.2098735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/15/2022] [Accepted: 06/30/2022] [Indexed: 10/17/2022]
Abstract
Purpose/Aim of the study: Since chalcones belong to the flavonoid family, the effects of a new synthetic chalcone derivative on memory, chronic stress, and expression of hippocampal BDNF gene were studied.Materials and methods: In this experiment, the male wistar rats were placed under restraint stress (6 h/day) for 21 days and then treated with a newly synthesized chalcone, containing methoxy on the aromatic rings or vehicles (20 mg/kg, intraperitoneal, IP). After the behavioral Passive avoidance, Open field, and Morris water maze tests, the levels of serum corticosterone (CORT) and hippocampal brain-derived neurotrophic factor (BDNF) were analyzed.Results: Results of these tests presented significant differences between the Stress (St) and Chalcone (Ch) groups. Chronic stress led to high CORT levels and impaired memory functions. Moreover, a single dose of synthetic chalcone in the St group could postpone memory impairments. Furthermore, a 20 mg/kg IP injection of chalcone markedly attenuated the decrease of hippocampal BDNF.Conclusions: It has been already proposed that flavonoids have beneficial effects on different types of memory. According to these results, further investigations are required to explore other factors besides BDNF that could be acutely modulated by chalcones.
Collapse
Affiliation(s)
| | | | | | - Mona Farhadi
- Department of Microbiology, Islamic Azad University, Karaj, Iran
| | - Shabnam Nadjafi
- Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Javad Fahanik Babaei
- Electrophysiology Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Nasrin Hosseini
- Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
2
|
Xu J, Wu A, Filip C, Patel Z, Bernstein SR, Tanveer R, Syed H, Kotroczo T. Active recall strategies associated with academic achievement in young adults: A systematic review. J Affect Disord 2024; 354:191-198. [PMID: 38461899 DOI: 10.1016/j.jad.2024.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 03/12/2024]
Abstract
BACKGROUND Effective learning strategies are crucial to the development of academic skills and information retention, especially in post secondary education where increasingly complex subjects are explored. Active recall-based strategies have been identified as particularly effective for long-term learning. This systematic review investigates the effectiveness of various active recall-based learning strategies for improving academic performance and self-efficacy in higher education students. METHODS A systematic review of peer-reviewed articles was conducted with a priori criteria by searching PubMed, ScienceDirect, JSTOR, PsycInfo, and Web of Science databases. Search results were screened/extracted and reconciled by two independent authors with the use of a piloted screening tool. Included studies were assessed for quality and risk of bias using the GRADE Quality Assessment Tool for Quantitative Studies. Three overarching study strategies were extracted for further investigation including flashcards, practice testing or retrieval practice, and concept mapping. Within each category, three additional unique search strings were searched, screened, and extracted. A qualitative analysis of the studies was provided. RESULTS Among the appraised articles, flashcards were found to be popular and correlated with higher GPA and test scores. Self-testing, retrieval practice, and concept mapping were also effective but under-utilized. Concept mapping was found to boost student confidence. CONCLUSION Active recall strategies exhibit promise for effective learning and additional research in these developing field can support academic pursuits.
Collapse
Affiliation(s)
- Joy Xu
- David Geffen School of Medicine, Los Angeles, CA, United States.
| | - Alyssa Wu
- University of Western Ontario, London, ON, Canada
| | - Cosmina Filip
- David Geffen School of Medicine, Los Angeles, CA, United States
| | - Zinal Patel
- David Geffen School of Medicine, Los Angeles, CA, United States
| | | | | | - Hiba Syed
- University of Western Ontario, London, ON, Canada
| | | |
Collapse
|
3
|
Su LJ, Chen MJ, Yang R, Zou H, Chen TT, Li SL, Xin HN, Hu RF. Investigating the correlation of delirium after cardiac surgery with memories and posttraumatic stress disorder consequences of intensive care unit: A prospective cohort study. Intensive Crit Care Nurs 2024; 82:103632. [PMID: 38290221 DOI: 10.1016/j.iccn.2024.103632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/11/2024] [Accepted: 01/20/2024] [Indexed: 02/01/2024]
Abstract
OBJECTIVES To explore the differences in post-intensive care unit memory and posttraumatic stress disorder symptoms between patients with and without delirium, and assess the correlations between the two. DESIGN Prospective cohort observation study. SETTING A cardiac intensive care unit of a tertiary hospital in China. We enrolled 318 consecutive patients after cardiac surgery between December 2017 and March 2019. MAIN OUTCOME MEASURES Delirium was assessed using the Confusion Assessment Method for the ICU from intensive care unit admission to discharge. Intensive care unit memory was assessed using the ICU-Memory Tool through face-to-face interviews one week after discharge. Posttraumatic stress disorder was measured telephonically using the Impact of Events Scale-revised questionnaire at three months post-discharge. RESULTS Eighty patients each in the delirium and non-delirium groups were enrolled for follow-up interviews. Patients with delirium had vaguer memories of pre-intensive care unit admission and of their stay, and recollected more memories of feelings (vs. without delirium). Posttraumatic stress disorder was diagnosed in 14 patients with and in seven without delirium, with non-significant differences between groups. Delirium did not influence post-intensive care unit factual, feeling, and delusional memories, nor posttraumatic stress disorder and hyperarousal, intrusion, and avoidance. The memories of feelings were positively correlated with the last three (r = 0.285, r = 0.390 and r = 0.373, respectively). CONCLUSION Patients with delirium had vague intensive care unit memories. Memories of feelings were positively correlated with symptoms of hyperarousal, intrusion, and avoidance. Delirium did not influence factual, feeling, or delusional memories nor posttraumatic stress disorder incidence and symptoms. IMPLICATIONS FOR CLINICAL PRACTICE Interventions are needed to reduce the impact of vague memory in patients with post-intensive care unit delirium. Memories of feelings should be focused on because of their correlation with hyperarousal, intrusion, and avoidance. Delirium prevention and early recognition measures are suggested.
Collapse
Affiliation(s)
- Li-Jing Su
- School of Nursing, Fujian Medical University, Fuzhou, Fujian Province 350122, China
| | - Mei-Jing Chen
- School of Nursing, Fujian Medical University, Fuzhou, Fujian Province 350122, China
| | - Rong Yang
- Follow-Up Center, Fujian Medical University Union Hospital, Fuzhou, Fujian Province 350001, China
| | - Hong Zou
- Department of Clinical Laboratory, Fujian Medical University Union Hospital, Fuzhou, Fujian Province 350001, China
| | - Ting-Ting Chen
- School of Nursing, Fujian Medical University, Fuzhou, Fujian Province 350122, China
| | - Sai-Lan Li
- Department of Cardiac Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian Province 350001, China
| | - Hui-Ning Xin
- Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, Fuzhou, Fujian Province 350001, China.
| | - Rong-Fang Hu
- School of Nursing, Fujian Medical University, Fuzhou, Fujian Province 350122, China.
| |
Collapse
|
4
|
Golmakani MR, Abrari K, Goudarzi I, Khodaparast A, Bagheri F. Protective role of Eugenol against the destructive effects of lead on conditioned fear memory in male rats with post-traumatic stress disorder-related behavioral traits. IBRO Neurosci Rep 2024; 16:395-402. [PMID: 38444813 PMCID: PMC10912844 DOI: 10.1016/j.ibneur.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/16/2024] [Accepted: 02/24/2024] [Indexed: 03/07/2024] Open
Abstract
Introduction Post-traumatic stress disorder (PTSD) is a consequence of living in today's stressful society. Patients have difficulty forgetting traumatic events. lead pollution has many effects on the nervous system, one of which is memory and learning disorders. The herbal medicine Eugenol has a beneficial effect on memory. Aim This study aims to investigate the protective effect of Eugenol on lead-induced memory impairments in stressed rats. Methods In the first experiment, the animals were divided into three groups: SPS+Saline, SPS+Pb, and naïve. The SPS+Saline, SPS+Pb groups received normal saline and lead through gavage for 21 days, while the sham group remained untreated. Rats were subjected to the modified single prolonged stress model. Memory tests were conducted one week later, evaluating freezing levels in three consecutive tests over three days. In the second experiment, rats were divided into a SPS+Pb+Saline and three treatment groups. The SPS+Pb+Saline group received daily saline injections, while the other groups received different doses of Eugenol (25, 50, and 100 mg/kg). Memory tests similar to the first experiment were conducted. Results The results showed significantly higher immobility levels in the SPS+Saline and SPS+Pb groups compared to the sham. Additionally, the SPS+Pb group had a significant higher immobility compared to the SPS+Saline group. In the second experiment, the SPS+Pb+EU 25 group showed a significant lower freezing compared to the SPS+Pb+Saline group. Additionally, freezing in the SPS+Pb+EU 50 and SPS+Pb+EU 100 groups was significantly higher than in the SPS+Pb+EU 25 group. The SPS+Pb+EU 50 group showed a significant higher freezing compared to the SPS+Pb+Saline group. Conclusion lead acetate exacerbated memory impairments in stressed rats and Eugenol, particularly at a dose of 25 mg/kg, improved these impairments. Therefore, Eugenol has the potential to partially reduce the negative effects of lead on memory in individuals with PTSD.
Collapse
Affiliation(s)
| | - Kataneh Abrari
- Faculty of Biological Sciences, Kharazmi University, Postal Code: 3197937551, Karaj, Iran
| | - Iran Goudarzi
- School of Biology, Damghan University, Damghan, Iran
| | | | | |
Collapse
|
5
|
Schönberger DK, Bruns P, Röder B. Visual artificial grammar learning across 1 year in 7-year-olds and adults. J Exp Child Psychol 2024; 241:105864. [PMID: 38335709 DOI: 10.1016/j.jecp.2024.105864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 11/30/2023] [Accepted: 01/08/2024] [Indexed: 02/12/2024]
Abstract
Acquiring sequential information is of utmost importance, for example, for language acquisition in children. Yet, the long-term storage of statistical learning in children is poorly understood. To address this question, 27 7-year-olds and 28 young adults completed four sessions of visual sequence learning (Year 1). From this sample, 16 7-year-olds and 20 young adults participated in another four equivalent sessions after a 12-month-delay (Year 2). The first three sessions of each year used Stimulus Set 1, and the last session used Stimulus Set 2 to investigate transfer effects. Each session consisted of alternating learning and test phases in a modified artificial grammar learning task. In Year 1, 7-year-olds and adults learned the regularities and showed transfer to Stimulus Set 2. Both groups retained their final performance level over the 1-year period. In Year 2, children and adults continued to improve with Stimulus Set 1 but did not show additional transfer gains. Adults overall outperformed children, but transfer effects were indistinguishable between both groups. The current results suggest that long-term memory traces are formed from repeated sequence learning that can be used to generalize sequence rules to new visual input. However, the current study did not provide evidence for a childhood advantage in learning and remembering sequence rules.
Collapse
Affiliation(s)
- Daniela K Schönberger
- Biological Psychology and Neuropsychology, University of Hamburg, D-20146 Hamburg, Germany.
| | - Patrick Bruns
- Biological Psychology and Neuropsychology, University of Hamburg, D-20146 Hamburg, Germany
| | - Brigitte Röder
- Biological Psychology and Neuropsychology, University of Hamburg, D-20146 Hamburg, Germany; LV Prasad Eye Institute, Hyderabad 500 034, India
| |
Collapse
|
6
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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.
| |
Collapse
|
7
|
Vörös D, Kiss O, Taigiszer M, László BR, Ollmann T, Péczely L, Zagorácz O, Kertes E, Kállai V, Berta B, Kovács A, Karádi Z, Lénárd L, László K. The role of intraamygdaloid oxytocin in spatial learning and avoidance learning. Peptides 2024; 175:171169. [PMID: 38340898 DOI: 10.1016/j.peptides.2024.171169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/26/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
The goal of the present study is to investigate the role of intraamygdaloid oxytocin in learning-related mechanisms. Oxytocin is a neuropeptide which is involved in social bonding, trust, emotional responses and various social behaviors. By conducting passive avoidance and Morris water maze tests on male Wistar rats, the role of intraamygdaloid oxytocin in memory performance and learning was investigated. Oxytocin doses of 10 ng and 100 ng were injected into the central nucleus of the amygdala. Our results showed that 10 ng oxytocin significantly reduced the time required to locate the platform during the Morris water maze test while significantly increasing the latency time in the passive avoidance test. However, the 100 ng oxytocin experiment failed to produce a significant effect in either of the tests. Wistar rats pretreated with 20 ng oxytocin receptor antagonist (L-2540) were administered 10 ng of oxytocin into the central nucleus of the amygdala and were also subjected to the aforementioned tests to highlight the role of oxytocin receptors in spatial- and avoidance learning. Results suggest that oxytocin supports memory processing during both the passive avoidance and the Morris water maze tests. Oxytocin antagonists can however block the effects of oxytocin in both tests. The results substantiate that oxytocin uses oxytocin receptors to enhance memory and learning performance.
Collapse
Affiliation(s)
- Dávid Vörös
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Orsolya Kiss
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Márton Taigiszer
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Bettina Réka László
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
| | - Tamás Ollmann
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - László Péczely
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Olga Zagorácz
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Erika Kertes
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Veronika Kállai
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Beáta Berta
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Anita Kovács
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
| | - Zoltán Karádi
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Cellular Bioimpedance Research Group, Szentágothai Research Center, University of Pécs, 7602 Pécs, Hungary; Molecular Endocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, 7602 Pécs, Hungary
| | - László Lénárd
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Molecular Endocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, 7602 Pécs, Hungary
| | - Kristóf László
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary.
| |
Collapse
|
8
|
Wijnen K, Genzel L, van der Meij J. Rodent maze studies: from following simple rules to complex map learning. Brain Struct Funct 2024; 229:823-841. [PMID: 38488865 PMCID: PMC11004052 DOI: 10.1007/s00429-024-02771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 01/30/2024] [Indexed: 03/17/2024]
Abstract
More than 100 years since the first maze designed for rodent research, researchers now have the choice of a variety of mazes that come in many different shapes and sizes. Still old designs get modified and new designs are introduced to fit new research questions. Yet, which maze is the most optimal to use or which training paradigm should be applied, remains up for debate. In this review, we not only provide a historical overview of maze designs and usages in rodent learning and memory research, but also discuss the possible navigational strategies the animals can use to solve each maze. Furthermore, we summarize the different phases of learning that take place when a maze is used as the experimental task. At last, we delve into how training and maze design can affect what the rodents are actually learning in a spatial task.
Collapse
Affiliation(s)
- Kjell Wijnen
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Postbus 9010, 6500 GL, Nijmegen, The Netherlands
| | - Lisa Genzel
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Postbus 9010, 6500 GL, Nijmegen, The Netherlands.
| | - Jacqueline van der Meij
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Postbus 9010, 6500 GL, Nijmegen, The Netherlands.
| |
Collapse
|
9
|
Schmidt B, Böhmer J, Schnuerch M, Koch T, Michelmann S. Post-hypnotic suggestion improves confidence and speed of memory access with long-lasting effects. Acta Psychol (Amst) 2024; 245:104240. [PMID: 38569321 DOI: 10.1016/j.actpsy.2024.104240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/20/2024] [Accepted: 03/28/2024] [Indexed: 04/05/2024] Open
Abstract
In our study, we use the post-hypnotic suggestion of easy remembering to improve memory with long-lasting effects. We tested 24 highly suggestible participants in an online study. Participants learned word lists and recalled them later in a recognition memory task. At the beginning of the study, participants were hypnotized and the post-hypnotic suggestion to remember easily was associated with a cue that participants used during the recognition memory task. In a control condition, the same participants used a neutral cue. One week later, participants repeated both conditions with new word lists. Participants were significantly faster and more confident in their recognition ratings in the easy-remembering condition compared to the control condition, and this effect persisted over one week. Crucially, the increased speed and confidence in the easy-remembering condition did not affect memory accuracy. That makes our hypnosis intervention promising for patients experiencing subjective memory impairments. APA PSYCINFO CODES: 2343 (Learning and Memory), 2380 (Consciousness States), 3351 (Clinical Hypnosis).
Collapse
Affiliation(s)
- Barbara Schmidt
- Institute of Psychosocial Medicine, Psychotherapy and Psychooncology, Jena University Hospital, Jena, Germany; Institute of Psychology, University of Jena, Jena, Germany.
| | - Justin Böhmer
- Institute of Psychology, University of Jena, Jena, Germany; Department of Psychiatry and Psychotherapy CCM, Charité - Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
| | | | - Tobias Koch
- Institute of Psychology, University of Jena, Jena, Germany
| | | |
Collapse
|
10
|
Jaywant A, Keenan A. Pathophysiology, Assessment, and Management of Post-Stroke Cognitive Impairment, Depression, and Fatigue. Phys Med Rehabil Clin N Am 2024; 35:463-478. [PMID: 38514230 DOI: 10.1016/j.pmr.2023.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Post-stroke cognitive impairment, depression, and fatigue are common, persistent, and disabling. This review summarizes current knowledge on the pathophysiology, assessment, and management of these debilitating neuropsychiatric sequelae of stroke. We briefly review evolving knowledge on the neural mechanisms and risk factors for each condition. We describe patient-reported outcome measures and clinician rating techniques that can be used to assist in screening and comprehensive assessment. We then discuss behavioral and pharmacologic management strategies. Heterogeneity of stroke remains a challenge in management and new research is still needed to optimize and personalize treatments for stroke survivors.
Collapse
Affiliation(s)
- Abhishek Jaywant
- Department of Psychiatry, Weill Cornell Medicine, 525 East 68th Street, New York, NY 10065, USA; Department of Rehabilitation Medicine, Weill Cornell Medicine, 525 East 68th Street, New York, NY 10065, USA; NewYork-Presbyterian Hospital/Weill Cornell Medical Center, 525 East 68th Street, New York, NY 10065, USA.
| | - Alexandra Keenan
- Department of Rehabilitation Medicine, Weill Cornell Medicine, 525 East 68th Street, New York, NY 10065, USA
| |
Collapse
|
11
|
Dubinin I, Effenberger F. Fading memory as inductive bias in residual recurrent networks. Neural Netw 2024; 173:106179. [PMID: 38387205 DOI: 10.1016/j.neunet.2024.106179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 02/07/2024] [Accepted: 02/13/2024] [Indexed: 02/24/2024]
Abstract
Residual connections have been proposed as an architecture-based inductive bias to mitigate the problem of exploding and vanishing gradients and increased task performance in both feed-forward and recurrent networks (RNNs) when trained with the backpropagation algorithm. Yet, little is known about how residual connections in RNNs influence their dynamics and fading memory properties. Here, we introduce weakly coupled residual recurrent networks (WCRNNs) in which residual connections result in well-defined Lyapunov exponents and allow for studying properties of fading memory. We investigate how the residual connections of WCRNNs influence their performance, network dynamics, and memory properties on a set of benchmark tasks. We show that several distinct forms of residual connections yield effective inductive biases that result in increased network expressivity. In particular, those are residual connections that (i) result in network dynamics at the proximity of the edge of chaos, (ii) allow networks to capitalize on characteristic spectral properties of the data, and (iii) result in heterogeneous memory properties. In addition, we demonstrate how our results can be extended to non-linear residuals and introduce a weakly coupled residual initialization scheme that can be used for Elman RNNs.
Collapse
Affiliation(s)
- Igor Dubinin
- Ernst Strüngmann Institute, Deutschordenstraße 46, Frankfurt am Main, 60528, Germany; Frankfurt Institute for Advanced Studies, Ruth-Moufang-Straße 1, Frankfurt am Main, 60438, Germany.
| | - Felix Effenberger
- Ernst Strüngmann Institute, Deutschordenstraße 46, Frankfurt am Main, 60528, Germany.
| |
Collapse
|
12
|
Puteikis K, Jasionis A, Jasionytė G, Mameniškienė R. Long-term effects of vagus nerve stimulation therapy on cognitive functioning in patients with drug-resistant epilepsy. Neurol Sci 2024; 45:2245-2252. [PMID: 37981620 DOI: 10.1007/s10072-023-07202-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 11/09/2023] [Indexed: 11/21/2023]
Abstract
BACKGROUND Despite the increasing use of vagus nerve stimulation (VNS) for drug-resistant epilepsy, its impact on cognitive functioning remains insufficiently investigated. OBJECTIVE We aimed to comprehensively assess changes in cognition after long-term VNS therapy in a prospective sample of adults with epilepsy. METHODS Between December 2019 and March 2023, patients scheduled for VNS implantation were invited for neuropsychological assessment, including tests of executive functions, working and short-term memory (recall of a verbal logical story and the Rey-Osterrieth complex figure (ROCF)), and social cognition. Participants were re-evaluated after a year of VNS therapy and the pre- and postoperative scores were compared by means of the Student's t or Wilcoxon's signed rank tests for paired samples. Patients available only after a longer follow-up (more than 24 months) were also re-examined and included in a secondary analysis. RESULTS The study included 28 PWE (16, 57.1% female, average age 33.7 ± 10.0 years). Twenty-two PWE followed-up at 14.5 ± 4.8 months had worse categorical verbal fluency than preoperatively (t = 2.613, p = 0.016). After including patients with long follow-up (n = 28, 21.6 ± 11.4 months), the group scored better on the delayed recall of the ROCF (17.09 ± 8.84 to 20.65 ± 8.32 points, t(22) = - 2.618, p = 0.016) and the Happé strange stories test (5.0 ± 2.6 to 6.1 ± 2.1 points, t(14) = - 3.281, p = 0.005). No significant changes were observed in other cognitive domains (p > 0.05). CONCLUSION We suggest improvements in a task of social cognition and short-term visual memory after longer use of VNS therapy. Such findings should be confirmed in larger trials after controlling for changes in ictal or interictal activity.
Collapse
Affiliation(s)
| | - Arminas Jasionis
- Centre for Neurology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | | | - Rūta Mameniškienė
- Centre for Neurology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| |
Collapse
|
13
|
Jahromi HM, Rafati A, Karbalay-Doust S, Keshavarz S, Naseh M. The combination treatment of hypothermia and intranasal insulin ameliorates the structural and functional changes in a rat model of traumatic brain injury. Brain Struct Funct 2024; 229:947-957. [PMID: 38498064 DOI: 10.1007/s00429-024-02769-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 01/26/2024] [Indexed: 03/19/2024]
Abstract
The present study aimed to investigate the combination effects of hypothermia (HT) and intranasal insulin (INS) on structural changes of the hippocampus and cognitive impairments in the traumatic brain injury (TBI) rat model. The rats were divided randomly into the following five groups (n = 10): Sham, TBI, TBI with HT treatment for 3 h (TBI + HT), TBI with INS (ten microliters of insulin) treatment daily for 7 days (TBI + INS), and TBI with combining HT and INS (TBI + HT + INS). At the end of the 7th day, the open field and the Morris water maze tests were done for evaluation of anxiety-like behavior and memory performance. Then, after sacrificing, the brain was removed for stereological study. TBI led to an increase in the total volume of hippocampal subfields CA1 and DG and a decrease in the total number of neurons and non-neuronal cells in both sub-regions, which was associated with anxiety-like behavior and memory impairment. Although, the combination of HT and INS prevented the increased hippocampal volume and cell loss and improved behavioral performances in the TBI group. Our study suggests that the combined treatment of HT and INS could prevent increased hippocampal volume and cell loss in CA1 and DG sub-regions and consequently improve anxiety-like behaviors and memory impairment following TBI.
Collapse
Affiliation(s)
- Hadi Moatamed Jahromi
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ali Rafati
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saied Karbalay-Doust
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Anatomy Department, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Somaye Keshavarz
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
- Department of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Maryam Naseh
- Histomorphometry and Stereology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| |
Collapse
|
14
|
Hayes AMR, Lauer LT, Kao AE, Sun S, Klug ME, Tsan L, Rea JJ, Subramanian KS, Gu C, Tanios N, Ahuja A, Donohue KN, Décarie-Spain L, Fodor AA, Kanoski SE. Western diet consumption impairs memory function via dysregulated hippocampus acetylcholine signaling. Brain Behav Immun 2024; 118:408-422. [PMID: 38461956 DOI: 10.1016/j.bbi.2024.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/16/2024] [Accepted: 03/07/2024] [Indexed: 03/12/2024] Open
Abstract
Western diet (WD) consumption during early life developmental periods is associated with impaired memory function, particularly for hippocampus (HPC)-dependent processes. We developed an early life WD rodent model associated with long-lasting HPC dysfunction to investigate the neurobiological mechanisms mediating these effects. Rats received either a cafeteria-style WD (ad libitum access to various high-fat/high-sugar foods; CAF) or standard healthy chow (CTL) during the juvenile and adolescent stages (postnatal days 26-56). Behavioral and metabolic assessments were performed both before and after a healthy diet intervention period beginning at early adulthood. Results revealed HPC-dependent contextual episodic memory impairments in CAF rats that persisted despite the healthy diet intervention. Given that dysregulated HPC acetylcholine (ACh) signaling is associated with memory impairments in humans and animal models, we examined protein markers of ACh tone in the dorsal HPC (HPCd) in CAF and CTL rats. Results revealed significantly lower protein levels of vesicular ACh transporter in the HPCd of CAF vs. CTL rats, indicating chronically reduced ACh tone. Using intensity-based ACh sensing fluorescent reporter (iAChSnFr) in vivo fiber photometry targeting the HPCd, we next revealed that ACh release during object-contextual novelty recognition was highly predictive of memory performance and was disrupted in CAF vs. CTL rats. Neuropharmacological results showed that alpha 7 nicotinic ACh receptor agonist infusion in the HPCd during training rescued memory deficits in CAF rats. Overall, these findings reveal a functional connection linking early life WD intake with long-lasting dysregulation of HPC ACh signaling, thereby identifying an underlying mechanism for WD-associated memory impairments.
Collapse
Affiliation(s)
- Anna M R Hayes
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Logan Tierno Lauer
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Alicia E Kao
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Shan Sun
- Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Molly E Klug
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Linda Tsan
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA; Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, USA
| | - Jessica J Rea
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA; Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, USA
| | - Keshav S Subramanian
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA; Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, USA
| | - Cindy Gu
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Natalie Tanios
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Arun Ahuja
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Kristen N Donohue
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Léa Décarie-Spain
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Anthony A Fodor
- Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, Charlotte, NC, USA
| | - Scott E Kanoski
- Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA; Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, USA.
| |
Collapse
|
15
|
Mosini AC, Gallego Adami LN, da Silva Vallim JR, Moysés-Oliveira M, Poyares D, Andersen ML, Tufik S. Leptin moderates the relationship between sleep quality and memory function: A population-based study. Sleep Med 2024; 117:146-151. [PMID: 38537522 DOI: 10.1016/j.sleep.2024.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 04/16/2024]
Abstract
Sleep is crucial for memory, as it promotes its encoding, consolidation, storage, and retrieval. Sleep periods following learning enhance memory consolidation. Leptin, a hormone that regulates appetite and energy balance, also influences memory and neuroplasticity. It plays a neurotrophic role in the hippocampus, enhancing synaptic function and promoting memory processes. Given these associations between sleep, memory, and leptin, this study aimed to evaluate the interplay between sleep quality, memory complaints and leptin levels. Using data from the São Paulo Epidemiologic Sleep Study (EPISONO) 2007 edition, we analyzed data from 881 participants who underwent evaluations for subjective sleep quality (Pittsburgh Sleep Quality Index), memory function (Prospective and Retrospective Memory Questionnaire), body mass index and plasmatic leptin levels. After confirming that subjects with poor sleep quality had more memory complaints in our cohort, we observed that leptin levels were increased in individuals with more memory complaints, but there was no association between leptin levels and sleep quality. Mediation analysis reinforced the direct effect of sleep quality on memory function, but leptin had no indirect effect as mediator over the sleep-memory association. Moderation analysis revealed that leptin acted as a moderator in the relationship between sleep quality and memory, with increased leptin levels enhancing the effect of sleep quality over memory function. These findings underscore the intricate interplay between sleep, memory, and metabolic factors like leptin, shedding light on potential mechanisms through which sleep influences memory and cognitive functions. Further research is needed to elucidate the exact mechanisms underlying these relationships and their implications for overall health and well-being.
Collapse
Affiliation(s)
- Amanda Cristina Mosini
- Sleep Institute, Associação Fundo de Incentivo à Pesquisa, São Paulo, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | | | - Dalva Poyares
- Sleep Institute, Associação Fundo de Incentivo à Pesquisa, São Paulo, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Monica L Andersen
- Sleep Institute, Associação Fundo de Incentivo à Pesquisa, São Paulo, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Sergio Tufik
- Sleep Institute, Associação Fundo de Incentivo à Pesquisa, São Paulo, Brazil; Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil.
| |
Collapse
|
16
|
Rolls ET. Two what, two where, visual cortical streams in humans. Neurosci Biobehav Rev 2024; 160:105650. [PMID: 38574782 DOI: 10.1016/j.neubiorev.2024.105650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 03/25/2024] [Accepted: 03/31/2024] [Indexed: 04/06/2024]
Abstract
ROLLS, E. T. Two What, Two Where, Visual Cortical Streams in Humans. NEUROSCI BIOBEHAV REV 2024. Recent cortical connectivity investigations lead to new concepts about 'What' and 'Where' visual cortical streams in humans, and how they connect to other cortical systems. A ventrolateral 'What' visual stream leads to the inferior temporal visual cortex for object and face identity, and provides 'What' information to the hippocampal episodic memory system, the anterior temporal lobe semantic system, and the orbitofrontal cortex emotion system. A superior temporal sulcus (STS) 'What' visual stream utilising connectivity from the temporal and parietal visual cortex responds to moving objects and faces, and face expression, and connects to the orbitofrontal cortex for emotion and social behaviour. A ventromedial 'Where' visual stream builds feature combinations for scenes, and provides 'Where' inputs via the parahippocampal scene area to the hippocampal episodic memory system that are also useful for landmark-based navigation. The dorsal 'Where' visual pathway to the parietal cortex provides for actions in space, but also provides coordinate transforms to provide inputs to the parahippocampal scene area for self-motion update of locations in scenes in the dark or when the view is obscured.
Collapse
Affiliation(s)
- Edmund T Rolls
- Oxford Centre for Computational Neuroscience, Oxford, UK; Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK; Institute of Science and Technology for Brain Inspired Intelligence, Fudan University, Shanghai 200403, China.
| |
Collapse
|
17
|
Li Y, Luan S, Ruan C, Li W, Zhang X, Ran Z, Bi W, Tong Y, Gao L, Zhao J, Li Y, He Z. TSHR signaling promotes hippocampal dependent memory formation through modulating Wnt5a/β-catenin mediated neurogenesis. Biochem Biophys Res Commun 2024; 704:149723. [PMID: 38430698 DOI: 10.1016/j.bbrc.2024.149723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/14/2024] [Accepted: 02/24/2024] [Indexed: 03/05/2024]
Abstract
Subclinical hyperthyroidism is defined biochemically as a low or undetectable thyroid-stimulating hormone (TSH) with normal thyroid hormone levels. Low TSHR signaling is considered to associate with cognitive impairment. However, the underlying molecular mechanism by which TSHR signaling modulates memory is poorly understood. In this study, we found that Tshr-deficient in the hippocampal neurons impairs the learning and memory abilities of mice, accompanying by a decline in the number of newborn neurons. Notably, Tshr ablation in the hippocampus decreases the expression of Wnt5a, thereby inactivating the β-catenin signaling pathway to reduce the neurogenesis. Conversely, activating of the Wnt/β-catenin pathway by the agonist SKL2001 results in an increase in hippocampal neurogenesis, resulting in the amelioration in the deficits of memory caused by Tshr deletion. Understanding how TSHR signaling in the hippocampus regulates memory provides insights into subclinical hyperthyroidism affecting cognitive function and will suggest ways to rationally design interventions for neurocognitive disorders.
Collapse
Affiliation(s)
- Yuchen Li
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Sisi Luan
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China; Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China
| | - Cairong Ruan
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Weihao Li
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Xinyu Zhang
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Zijing Ran
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Wenkai Bi
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Yuelin Tong
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Ling Gao
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China
| | - Jiajun Zhao
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China.
| | - Yuan Li
- Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China.
| | - Zhao He
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China; Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, 250021, China; Shandong Institute of Endocrine and Metabolic Diseases, Jinan, Shandong, 250021, China.
| |
Collapse
|
18
|
Paller KA. Recurring memory reactivation: The offline component of learning. Neuropsychologia 2024; 196:108840. [PMID: 38417546 PMCID: PMC10981210 DOI: 10.1016/j.neuropsychologia.2024.108840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 02/19/2024] [Accepted: 02/25/2024] [Indexed: 03/01/2024]
Abstract
One can be aware of the effort needed to memorize a new fact or to recall the name of a new acquaintance. Because of experiences like this, learning can seem to have only two components, encoding information and, after some delay, retrieving information. To the contrary, learning entails additional, intervening steps that sometimes are hidden from the learner. For firmly acquiring fact and event knowledge in particular, learners are generally not cognizant of the necessity of offline consolidation. The memories that persist to be available reliably at a later time, according to the present conceptualization, are the ones we repeatedly rehearse and integrate with other knowledge, whether we do this intentionally or unknowingly, awake or asleep. This article examines the notion that learning is not a function of waking brain activity alone. What happens in the brain while we sleep also impacts memory storage, and consequently is a critical component of learning. The idea that memories can change over time and become enduring has long been present in memory research and is foundational for the concept of memory consolidation. Nevertheless, the notion that memory consolidation happens during sleep faced much resistance before eventually being firmly established. Research is still needed to elucidate the operation and repercussions of repeated reactivation during sleep. Comprehensively understanding how offline memory reactivation contributes to learning is vital for both theoretical and practical considerations.
Collapse
Affiliation(s)
- Ken A Paller
- Northwestern University, Department of Psychology, Evanston, IL, 60208, USA.
| |
Collapse
|
19
|
Barros C, Sampaio A, Pinal D. Cardiorespiratory fitness mediates the relationship between depressive symptomatology and cognition in older but not younger adults. Exp Gerontol 2024; 191:112429. [PMID: 38608791 DOI: 10.1016/j.exger.2024.112429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/28/2024] [Accepted: 04/09/2024] [Indexed: 04/14/2024]
Abstract
Aging is commonly associated with emotional, physical, and cognitive changes, with the latter, particularly affecting executive functioning. Further, such changes may interact. For instance, depressive symptomatology is a known risk factor for developing cognitive deficits, especially at older ages. In contrast, an active lifestyle, reflected in high cardiorespiratory fitness (CRF) levels, has proven to protect against adverse effects on cognition across the adult lifespan. Hence, this study aimed to investigate the relationships between depressive symptomatology, CRF, and cognition during critical developmental stages, namely in young adults (YA), when cognitive abilities are at their peak, and in older adults (OA), when they may start to decline. Eighty-one OA with ages between 60 and 89 years (M = 70.46; SD = 7.18) and 77 YA with ages between 18 and 34 years (M = 22.54; SD = 3.72) went through (i) a sociodemographic interview, (ii) an emotional assessment, (iii) a battery of cognitive tests, and (iv) a physical evaluation assessing CRF levels, visceral fat and body-mass index. Results showed that OA exhibited lower general cognitive performance, inhibitory control, cognitive flexibility, memory, and CRF. Depressive symptoms and anxiety were not different among groups, with CRF mediating the relationship between depressive symptoms and cognition in the OA group. The present study provides valuable insights into the interplay between emotional, physical, and cognitive well-being. Additionally, it calls attention to how lifestyle factors can play a protective role against the adverse effects that depressive symptoms have on cognition, particularly at older ages.
Collapse
Affiliation(s)
- Catarina Barros
- Psychological Neuroscience Lab, Center for Research in Psychology, School of Psychology, University of Minho, Portugal
| | - Adriana Sampaio
- Psychological Neuroscience Lab, Center for Research in Psychology, School of Psychology, University of Minho, Portugal.
| | - Diego Pinal
- Psychological Neuroscience Lab, Center for Research in Psychology, School of Psychology, University of Minho, Portugal
| |
Collapse
|
20
|
de Vries OT, Duken SB, Kindt M, van Ast VA. No evidence that arousal affects reactivated memories. Neurobiol Learn Mem 2024:107928. [PMID: 38616019 DOI: 10.1016/j.nlm.2024.107928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 03/05/2024] [Accepted: 04/10/2024] [Indexed: 04/16/2024]
Abstract
Memory for inherently neutral elements of emotional events is often enhanced on delayed tests - an effect that has been attributed to noradrenergic arousal. Reactivation of a memory is thought to return its corresponding neural ensemble to a state that is similar to when it was originally experienced. Therefore, we hypothesized that neutral elements of memories, too, can be enhanced through reactivation concurrent with heightened arousal. Participants (n = 94) visited the lab for three sessions. During the first session, they encoded 120 neutral memories consisting of an object presented in unique context images. In session two, the 80 objects were reactivated by presenting their corresponding context images, 40 of which were immediately followed by an arousal-inducing shock. Finally, recognition memory for all objects was tested. It was found that memory for reactivated objects was enhanced, but even though the shocks elicited elevations in arousal as indexed by skin conductance, there was no difference between memory of objects reactivated with and without heightened arousal. We thus conclude that arousal, when isolated from other cognitive and affective variables that might impact memory, has no enhancing effect on reactivated memories.
Collapse
Affiliation(s)
- Olivier T de Vries
- Department of Clinical Psychology, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, the Netherlands.
| | - Sascha B Duken
- Department of Clinical Psychology, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, the Netherlands
| | - Merel Kindt
- Department of Clinical Psychology, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, the Netherlands
| | - Vanessa A van Ast
- Department of Clinical Psychology, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, the Netherlands.
| |
Collapse
|
21
|
Farias CP, Leite AKO, Schmidt BE, de Carvalho Myskiw J, Wyse ATS. The 5-HT2A, 5-HT5A, and 5-HT6 serotonergic receptors in the medial prefrontal cortex behave differently in extinction learning: Does social support play a role? Behav Brain Res 2024; 463:114922. [PMID: 38408524 DOI: 10.1016/j.bbr.2024.114922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 02/28/2024]
Abstract
Studies on the social modulation of fear have revealed that in social species, individuals in a distressed state show better recovery from aversive experiences when accompanied - referred to as social buffering. However, the underlying mechanisms remain unknown, hindering the understanding of such an approach. Our previous data showed that the presence of a conspecific during the extinction task inhibited the retrieval of fear memory without affecting the extinction memory in the retention test. Here, we investigate the role of serotonergic receptors (5-HTRs), specifically 5-HT2A, 5-HT5A, and 5-HT6 in the medial prefrontal cortex (mPFC), In the retention of extinction after the extinction task, in the absence or presence of social support. Extinction training was conducted on 60-day-old male Wistar rats either alone or with a conspecific (a familiar cagemate, non-fearful). The antagonists for these receptors were administered directly into the mPFC immediately after the extinction training. The results indicate that blocking 5-HT5A (SB-699551-10 μg/side) and 5-HT6 (SB-271046A - 10 μg/side) receptors in the mPFC impairs the consolidation of CFC in the social support group. Interestingly, blocking 5-HT2A receptors (R65777 - 4 μg/side) in the mPFC led to impaired CFC specifically in the group undergoing extinction training alone. These findings contribute to a better understanding of brain mechanisms and neuromodulation associated with social support during an extinction protocol. They are consistent with previously published research, suggesting that the extinction of contextual fear conditioning with social support involves distinct neuromodulatory processes compared to when extinction training is conducted alone.
Collapse
Affiliation(s)
- Clarissa Penha Farias
- Graduate Program in Translational Neuroscience, PGNET, National Institute of Translational Neuroscience, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil; Neuroprotection and Neurometabolic Diseases Laboratory (Wyse´s Lab), Brazil
| | - Ana Karla Oliveira Leite
- Graduate Program in Translational Neuroscience, PGNET, National Institute of Translational Neuroscience, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil; Neuroprotection and Neurometabolic Diseases Laboratory (Wyse´s Lab), Brazil
| | - Bianca Estefani Schmidt
- Graduate Program in Translational Neuroscience, PGNET, National Institute of Translational Neuroscience, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil; Neuroprotection and Neurometabolic Diseases Laboratory (Wyse´s Lab), Brazil
| | - Jociane de Carvalho Myskiw
- Memory Center, Brain Institute of Rio Grande do Sul, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Brazil
| | - Angela T S Wyse
- Graduate Program in Translational Neuroscience, PGNET, National Institute of Translational Neuroscience, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil; Neuroprotection and Neurometabolic Diseases Laboratory (Wyse´s Lab), Brazil; Graduate Program in Biological Sciences: Biochemistry, Department of Biochemistry, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
| |
Collapse
|
22
|
Strand BH, Håberg AK, Eyjólfsdóttir HS, Kok A, Skirbekk V, Huxhold O, Løset GK, Lennartsson C, Schirmer H, Herlofson K, Veenstra M. Spousal bereavement and its effects on later life physical and cognitive capability: the Tromsø study. GeroScience 2024:10.1007/s11357-024-01150-y. [PMID: 38594472 DOI: 10.1007/s11357-024-01150-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/31/2024] [Indexed: 04/11/2024] Open
Abstract
Spousal bereavement is associated with health declines and increased mortality risk, but its specific impact on physical and cognitive capabilities is less studied. A historical cohort study design was applied including married Tromsø study participants (N=5739) aged 50-70 years with baseline self-reported overall health and health-related factors and measured capability (grip strength, finger tapping, digit symbol coding, and short-term recall) at follow-up. Participants had data from Tromsø4 (1994-1995) and Tromsø5 (2001), or Tromsø6 (2007-2008) and Tromsø7 (2015-2016). Propensity score matching, adjusted for baseline confounders (and baseline capability in a subset), was used to investigate whether spousal bereavement was associated with poorer subsequent capability. Spousal bereavement occurred for 6.2% on average 3.7 years (SD 2.0) before the capability assessment. There were no significant bereavement effects on subsequent grip strength, immediate recall, or finger-tapping speed. Without adjustment for baseline digit symbol coding test performance, there was a negative significant effect on the digit symbol coding test (ATT -1.33; 95% confidence interval -2.57, -0.10), but when baseline digit symbol coding test performance was taken into account in a smaller subsample, using the same set of matching confounders, there was no longer any association (in the subsample ATT changed from -1.29 (95% CI -3.38, 0.80) to -0.04 (95% CI -1.83, 1.75). The results in our study suggest that spousal bereavement does not have long-term effects on the intrinsic capacity components physical or cognition capability to a notable degree.
Collapse
Affiliation(s)
- Bjørn Heine Strand
- Department for Physical Health and Aging, Norwegian Institute of Public Health, Oslo, Norway.
- Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway.
- Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway.
| | - Asta K Håberg
- Department for Physical Health and Aging, Norwegian Institute of Public Health, Oslo, Norway
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU, Trondheim, Norway
| | - Harpa Sif Eyjólfsdóttir
- Aging Research Center (ARC), Karolinska Institutet, Stockholm, Sweden
- Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Stockholm University, Stockholm, Sweden
| | - Almar Kok
- Department of Epidemiology & Data Science, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Amsterdam Public Health, Aging & Later Life Programme, Amsterdam, The Netherlands
| | - Vegard Skirbekk
- Department for Physical Health and Aging, Norwegian Institute of Public Health, Oslo, Norway
- Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway
- Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
| | | | - Gøril Kvamme Løset
- NOVA - Norwegian Social Research, Oslo Metropolitan University, Oslo, Norway
| | - Carin Lennartsson
- Aging Research Center (ARC), Karolinska Institutet, Stockholm, Sweden
- Swedish Institute for Social Research (SOFI), Stockholm University, Stockholm, Sweden
| | - Henrik Schirmer
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
- Department of Cardiology, Akershus, University Hospital, Lørenskog, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Katharina Herlofson
- NOVA - Norwegian Social Research, Oslo Metropolitan University, Oslo, Norway
| | | |
Collapse
|
23
|
Gilbert SJ. Cognitive offloading is value-based decision making: Modelling cognitive effort and the expected value of memory. Cognition 2024; 247:105783. [PMID: 38583321 DOI: 10.1016/j.cognition.2024.105783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/09/2024]
Abstract
How do people decide between maintaining information in short-term memory or offloading it to external reminders? How does this affect subsequent memory? This article presents a simple computational model based on two principles: A) items stored in brain-based memory occupy its limited capacity, generating an opportunity cost; B) reminders incur a small physical-action cost, but capacity is effectively unlimited. These costs are balanced against the value of remembering, which determines the optimal strategy. Simulations reproduce many empirical findings, including: 1) preferential offloading of high-value items; 2) increased offloading at higher memory loads; 3) offloading can cause forgetting of offloaded items ('Google effect') but 4) improved memory for other items ('saving-enhanced memory'); 5) reduced saving-enhanced-memory effect when reminders are unreliable; 6) influence of item-value: people may preferentially offload high-value items and store additional low-value items in brain-based memory; 7) greatest sensitivity to the effort of reminder-setting at intermediate rather than highest/lowest levels of task difficulty; 8) increased offloading in individuals with poorer memory ability. Therefore, value-based decision-making provides a simple unifying account of many cognitive offloading phenomena. These results are consistent with an opportunity-cost model of cognitive effort, which can explain why internal memory feels effortful but reminders do not.
Collapse
Affiliation(s)
- Sam J Gilbert
- Institute of Cognitive Neuroscience, University College London, London, UK.
| |
Collapse
|
24
|
Lamtai M, Benmhammed H, Azirar S, Rezqaoui A, Zghari O, El Hamzaoui A, El Brouzi MY, Chahirou Y, Bikri S, Mesfioui A, El Hessni A. Subchronic Exposure to Mixture of Cadmium, Copper, and Nickel Induces Neurobehavioral Deficits and Hippocampal Oxidative Stress of Wistar Rats. Biol Trace Elem Res 2024:10.1007/s12011-024-04166-9. [PMID: 38578484 DOI: 10.1007/s12011-024-04166-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 03/28/2024] [Indexed: 04/06/2024]
Abstract
The present study was aimed at evaluating the influence of the subchronic exposure of cadmium (Cd), copper (Cu), and nickel (Ni) mixtures on affective behaviors, memory impairment, and oxidative stress (OS) in the hippocampus. Thirty male Wistar rats were divided into 5 equal groups. Group 1 (control) received a saline solution (NaCl 0.9%). Groups 2, 3, and 4 received Cd (0.25 mg/kg), Cu (0.5 mg/kg), and Ni (0.25 mg/kg), respectively, while group 5 received a Cd, Cu, and Ni mixture through intraperitoneal injections for 2 months. After the exposure period, all rats were submitted to behavioral tests. Subsequently, OS markers and histological changes in the rats' hippocampi were assessed. Results showed that a 2-month exposure to the mixtures of metals (MM) has led to higher anxiety-like and depression-like behaviors and cognitive deficits in rats when compared to the control group and the individual metals. Furthermore, the MM induced heightened OS, evidenced by the rise in lipid peroxidation and nitric oxide levels. These effects were accompanied by a decrease in superoxide dismutase and catalase activities in the hippocampus. The histopathological analysis also supported that MM caused a neuronal loss in the CA3 sub-region. Overall, this study underscores that subchronic exposure to the Cd, Cu, and Ni mixture induces an OS status and histological changes in the hippocampus, with important affective and cognitive behavior variations in rats.
Collapse
Affiliation(s)
- Mouloud Lamtai
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco.
| | - Hajar Benmhammed
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Sofia Azirar
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Ayoub Rezqaoui
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Oussama Zghari
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Abdelghafour El Hamzaoui
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Mohamed Yassine El Brouzi
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Yassine Chahirou
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Samir Bikri
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Abdelhalem Mesfioui
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| | - Aboubaker El Hessni
- Laboratory of Biology and Health, Department of Biology, Faculty of Sciences, Ibn Tofail University, Kenitra, Morocco
| |
Collapse
|
25
|
Dama D, Sharma SK. Crebinostat facilitates memory formation. Biochem Biophys Res Commun 2024; 710:149872. [PMID: 38593621 DOI: 10.1016/j.bbrc.2024.149872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/29/2024] [Indexed: 04/11/2024]
Abstract
Protein modifications importantly contribute to memory formation. Protein acetylation is a post-translational modification of proteins that regulates memory formation. Acetylation level is determined by the relative activities of acetylases and deacetylases. Crebinostat is a histone deacetylase inhibitor. Here we show that in an object recognition task, crebinostat facilitates memory formation by a weak training. Further, this compound enhances acetylation of α-tubulin, and reduces the level of histone deacetylase 6, an α-tubulin deacetylase. The results suggest that enhanced acetylation of α-tubulin by crebinostat contributes to its facilitatory effect on memory formation.
Collapse
Affiliation(s)
- Deepti Dama
- National Brain Research Centre, Manesar, 122052, Haryana, India
| | - Shiv K Sharma
- National Brain Research Centre, Manesar, 122052, Haryana, India.
| |
Collapse
|
26
|
Aksoz E, Akyol BA, Korkut O. The role of the cholinergic system in the memory-protecting effects of metformin in a model of scopolamine-induced memory impairment in aged rats. Behav Brain Res 2024; 466:114978. [PMID: 38582410 DOI: 10.1016/j.bbr.2024.114978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/24/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
PURPOSE As the elderly population grows, the prevalence of dementia is also rapidly increasing worldwide. Metformin, an antidiabetic drug, has been shown to have ameliorative effects on impaired cognitive functions in experimental models. However, studies have generally used young animals. Additionally, although it has a major role in Alzheimer's disease (AD) and memory, literature information about the effects of metformin on the cholinergic system is limited. In this study, we investigated the effects of metformin on memory in a model of scopolamine-induced memory impairment in aged rats. We also examined the effects of metformin on the cholinergic system, which is very important in cognitive functions. METHODS Metformin was administered orally to male Wistar rats (20-22 months old) at 100 mg/kg/day for three weeks. Morris water maze (MWM) tests were performed to assess spatial memory. Before the probe test of the MWM test, scopolamine was injected intraperitoneally at a dose of 1 mg/kg. After testing, animals were sacrificed, whole brains were removed, and hippocampus samples were separated for biochemical analysis. RESULTS Impaired memory associated with scopolamine administration was reversed by metformin. In addition, metformin administration ameliorated scopolamine-induced changes in acetylcholine (ACh) levels, acetylcholinesterase (AChE), butyrylcholinesterase (BuChE), and choline acetyltransferase (ChAT) activity. CONCLUSION Our results show that metformin may have protective effects in a scopolamine-induced memory impairment model in aged animals by improving cholinergic function. Metformin shows promise in preventing dementia with its dual cholinesterase inhibition and ChAT activation effect.
Collapse
Affiliation(s)
- Elif Aksoz
- Balikesir University, Faculty of Medicine, Department of Medical Pharmacology, Cagis Campus, Balikesir, Turkey.
| | - Busra Aslan Akyol
- Balikesir University, Institute of Health Sciences, Department of Veterinary Pharmacology and Toxicology, Cagis Campus, Balikesir, Turkey
| | - Oguzhan Korkut
- Balikesir University, Faculty of Medicine, Department of Medical Pharmacology, Cagis Campus, Balikesir, Turkey
| |
Collapse
|
27
|
Sherman ER, Li J, Cahill EN. No impairment of contextual fear memory consolidation by oxytocin receptor antagonism in male rats. Physiol Behav 2024; 279:114545. [PMID: 38580203 DOI: 10.1016/j.physbeh.2024.114545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/11/2024] [Accepted: 04/02/2024] [Indexed: 04/07/2024]
Abstract
Oxytocin is a peptide released into brain regions associated with the processing of aversive memory and threat responses. Given the expression of oxytocin receptors across this vigilance surveillance system of the brain, we investigated whether pharmacological antagonism of the receptor would impact contextual aversive conditioning and memory. Adult male rats were conditioned to form an aversive contextual memory. The effects of peripheral administration of either the competitive antagonist Atosiban or noncompetitive antagonist L-368,899 were compared to saline controls. Oxytocin receptor antagonism treatment did not significantly impact the consolidation of aversive contextual memory in any of the groups. We conclude that peripheral antagonism of oxytocin signalling did not impact the formation of aversive memory.
Collapse
Affiliation(s)
- Emily R Sherman
- Department of Physiology, Development, and Neuroscience, University of Cambridge, CB2 3EB, UK
| | - Jialu Li
- Bristol Medical School, University of Bristol, BS8 1TH, UK
| | - Emma N Cahill
- Department of Physiology, Development, and Neuroscience, University of Cambridge, CB2 3EB, UK; School of Physiology, Pharmacology and Neuroscience, University of Bristol, BS8 1TD, UK.
| |
Collapse
|
28
|
Jung JH, Park JH, Park KH. Comparison of lifestyle, cognitive function, mental health, and quality of life between hospitalized older adults with COVID-19 and non-COVID-19 in South Korea: a cross-sectional study. BMC Geriatr 2024; 24:306. [PMID: 38565998 PMCID: PMC10986076 DOI: 10.1186/s12877-023-04646-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/28/2023] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND The coronavirus disease (COVID-19) pandemic has greatly impacted older adults, resulting in many deaths. The impact of lifestyle and mental health on vulnerable groups, such as older adults, can be large and long lasting. Therefore, this study aimed to investigate the effects of COVID-19 confirmation on cognition, lifestyle, mental health, and quality of life in adults aged 55 years. METHODS The sample consisted of 111 people in the COVID group and 189 people in the non-COVID group aged over 55 years in South Korea. An online survey was conducted between January and May 2022. Participants responded to the following assessment tools: Yonsei Lifestyle Profile, Prospective and Retrospective Memory (PRMQ), Subjective Memory Complaints Questionnaire (SMCQ), Visual Analogue Scale, Patient Health Questionnaire-9 (PHQ-9), Insomnia Severity Index (ISI), Fear of COVID-19 Scale (FCV-19 S), and the World Health Organization Quality of Life Scale abbreviated version (WHOQOL-BREF). Differences in lifestyle, cognition, depression, anxiety, and quality of life were compared between the two groups. RESULTS There were significant differences in physical activity, diet, the total score of the PRMQ, PM (a sub-score of the PRMQ), PHQ-9, Korean version of the ISI (ISI-K), and WHOQOL-BREF scores between the COVID and non-COVID groups. However, there were no significant differences in activity participation, Self-Rating Anxiety Scale (SAS), or FCV-19 S between groups. CONCLUSIONS The study confirms that COVID-19 negatively affects memory, physical activity, diet, quality of life, depression, and insomnia in the older adults. Therefore, this study implicated that prevention and intervention strategies required improving the memory, lifestyle, and mental health of older adults with COVID-19. TRIAL REGISTRATION The study was conducted in accordance with the Declaration of Helsinki, and approved by the Institutional Review Board of Yonsei university in Korea (Registration number: 1041849-202112-SB-226-03, Date of registration: 01042022).
Collapse
Affiliation(s)
- Jae Hyu Jung
- Department of Occupational Therapy, Gyeonggi Provincial Medical Center, Anseong, Korea
| | - Ji-Hyuk Park
- Department of Occupational Therapy, College of Software and Digital Healthcare Convergence, Yonsei University, Wonju, Korea
| | - Kang-Hyun Park
- Department of Occupational Therapy, Baekseok University, Cheonan, Korea.
| |
Collapse
|
29
|
Pasquini J, Firbank MJ, Best L, Foster V, Galley D, Silani V, Ceravolo R, Petrides G, Brooks DJ, Anderson KN, Pavese N. Hypothalamic involvement in multiple system atrophy: A structural MRI study. J Neurol Sci 2024; 460:122985. [PMID: 38581741 DOI: 10.1016/j.jns.2024.122985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/15/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
OBJECTIVE To investigate hypothalamic atrophy and its clinical correlates in multiple system atrophy (MSA) in-vivo. BACKGROUND MSA is characterized by autonomic dysfunction and parkinsonian/cerebellar manifestations. The hypothalamus regulates autonomic and homeostatic functions and is also involved in memory and learning processes. METHODS 11 MSA, 18 Parkinson's Disease (PD) and 18 Healthy Controls (HC) were included in this study. A validated and automated hypothalamic segmentation tool was applied to 3D-T1-weighted images acquired on a 3T MRI scanner. MSA hypothalamic volumes were compared to those of PD and HC. Furthermore, the association between hypothalamic volumes and scores of autonomic, depressive, sleep and cognitive manifestations were investigated. RESULTS Posterior hypothalamus volume was reduced in MSA compared to controls (t = 2.105, p = 0.041) and PD (t = 2.055, p = 0.046). Total hypothalamus showed a trend towards a reduction in MSA vs controls (t = 1.676, p = 0.101). Reduced posterior hypothalamus volume correlated with worse MoCA scores in the parkinsonian (MSA + PD) group and in each group separately, but not with autonomic, sleep, or depression scores. CONCLUSIONS In-vivo structural hypothalamic involvement may be present in MSA. Reduced posterior hypothalamus volume, which includes the mammillary bodies and lateral hypothalamus, is associated with worse cognitive functioning. Larger studies on hypothalamic involvement in MSA and its clinical correlates are needed.
Collapse
Affiliation(s)
- Jacopo Pasquini
- Clinical Ageing Research Unit, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom; Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Michael J Firbank
- Institute of Translational and Clinical Research, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom
| | - Laura Best
- Regional Neurosciences Centre, Royal Victoria Hospital, Belfast, United Kingdom
| | - Victoria Foster
- Clinical Ageing Research Unit, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom
| | - Debra Galley
- Clinical Ageing Research Unit, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom
| | - Vincenzo Silani
- Department of Neurology and Laboratory of Neuroscience, Istituto Auxologico Italiano IRCCS, Milan, Italy; Department of Pathophysiology and Transplantation, Dino Ferrari Center, Università degli Studi di Milano, Milan, Italy
| | - Roberto Ceravolo
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy; Neurodegenerative Diseases Center, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy
| | - George Petrides
- Nuclear Medicine Department, Newcastle Upon Tyne Hospitals NHS Foundation Trust, UK
| | - David J Brooks
- Institute of Translational and Clinical Research, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom; Department of Nuclear Medicine and PET Centre, Institute of Clinical Medicine Aarhus University, Aarhus 8200, Denmark
| | - Kirstie N Anderson
- Regional Sleep Service, Newcastle upon Tyne NHS Hospitals NHS Foundation Trust, UK
| | - Nicola Pavese
- Clinical Ageing Research Unit, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom; Department of Nuclear Medicine and PET Centre, Institute of Clinical Medicine Aarhus University, Aarhus 8200, Denmark.
| |
Collapse
|
30
|
Wen C, Li ZH, Cheng L, Zheng JZ, Wang P, Chen L, You QY, Ding L. LC-MS/MS analysis of Shenghui decoction component and its effect on learning and memory and neuroprotection in sleep deprivation model mice. Fitoterapia 2024; 174:105823. [PMID: 38307137 DOI: 10.1016/j.fitote.2024.105823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/25/2023] [Accepted: 01/11/2024] [Indexed: 02/04/2024]
Abstract
BACKGROUND In recent years, sleep problems have emerged as a significant factor in the development of diseases that influence cognitive function. The inflammatory response may have a role in the neurobiological processes of sleep deprivation, resulting in impairment of memory and learning. Shenghui Decoction (SHD) is a classic formula in Chinese medicine used to treat forgetfulness and insomnia. However, it remains unclear whether the anti-inflammatory effects of SHD are specifically linked to the inhibition of P2X7R and p38MAPK. METHODS Analysis of chemical constituents of Shenghui Decoction based on UPLC-Q-TOF-MS / MS. The learning and memory competency of the mice was assessed using the new object recognition and Morris water maze tests. The morphology of hippocampus neurons was observed using HE staining, and the expression of inflammatory factors was measured using ELISA and immunofluorescence. The expression of P2X7R and p38MAPK in the hippocampus was analyzed via real-time PCR and Western blotting. Additionally, the components absorbed into the bloodstream of SHD were analyzed. RESULTS The study found that SHD contains 47 chemical constituents, including phenolic acids, flavonoids, iridoids, and triterpenoids. In addition, it was observed that SHD significantly improved the learning and memory abilities of the mice. SHD also improved the morphology of hippocampus neurons. The expression of inflammatory factors was decreased in the SHD-treated mice. Additionally, the expression of P2X7R and p38MAPK was decreased in the hippocampus of the SHD-treated mice. Fifteen prototype chemical constituents were detected in blood. CONCLUSIONS The study suggests that SHD could be a viable treatment for cognitive impairments associated with brain inflammation. The therapeutic effects of SHD are likely due to its chemical components, including phenolic acids, flavonoids, iridoids, and triterpenoids. SHD can improve learning and memory impairment caused by sleep deprivation through the P2X7R/p38MAPK inflammatory signaling pathways.
Collapse
Affiliation(s)
- Chun Wen
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Zi-Heng Li
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Li Cheng
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Jun-Zuo Zheng
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Ping Wang
- Institute of Geriatrics, Hubei University of Chinese Medicine, Wuhan, China
| | - Linlin Chen
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Qiu-Yun You
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Li Ding
- School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China.
| |
Collapse
|
31
|
Berbert-Gomes C, Ramos JS, Silveira-Rodrigues JG, Leite DMM, Melo BP, Soares DD. An acute bout of resistance exercise increases BDNF in hippocampus and restores the long-term memory of insulin-resistant rats. Exp Brain Res 2024; 242:901-912. [PMID: 38453752 DOI: 10.1007/s00221-024-06795-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 01/24/2024] [Indexed: 03/09/2024]
Abstract
A sedentary lifestyle, inadequate diet, and obesity are substantial risk factors for Type 2 diabetes mellitus (T2DM) development. A major picture of T2DM is insulin resistance (IR), which causes many impairments in brain physiology, such as increased proinflammatory state and decreased brain-derived neurotrophic factor (BDNF) concentration, hence reducing cognitive function. Physical exercise is a non-pharmacological tool for managing T2DM/IR and its complications. Thus, this study investigated the effects of IR induction and the acute effects of resistance exercise (RE) on memory, neurotrophic, and inflammatory responses in the hippocampus and prefrontal cortex of insulin-resistant rats. IR was induced by a high-fat diet and fructose-rich beverage. Insulin-resistant rats performed acute resistance exercise (IR.RE; vertical ladder climb at 50-100% of the maximum load) or rest (IR.REST; 20 min). Cognitive parameters were assessed by novel object recognition (NOR) tasks, and biochemical analyses were performed to assess BDNF concentrations and inflammatory profile in the hippocampus and prefrontal cortex. Insulin-resistant rats had 20% worse long-term memory (LTM) (p < 0.01) and lower BDNF concentration in the hippocampus (-14.6%; p < 0.05) when compared to non-insulin-resistant rats (CON). An acute bout of RE restored LTM (-9.7% pre vs. post; p > 0.05) and increased BDNF concentration in the hippocampus (9.1%; p < 0.05) of insulin-resistant rats compared to REST. Thus, an acute bout of RE can attenuate the adverse effects of IR on memory and neurotrophic factors in rats, representing a therapeutic tool to alleviate the IR impact on the brain.
Collapse
Affiliation(s)
- Camila Berbert-Gomes
- Exercise Physiology Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais (Universidade Federal de Minas Gerais -UFMG), Belo Horizonte, MG, 31270‑901, Brazil
| | - Júlia S Ramos
- Exercise Physiology Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais (Universidade Federal de Minas Gerais -UFMG), Belo Horizonte, MG, 31270‑901, Brazil
| | - João G Silveira-Rodrigues
- Exercise Physiology Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais (Universidade Federal de Minas Gerais -UFMG), Belo Horizonte, MG, 31270‑901, Brazil
| | - Daniel M M Leite
- Exercise Physiology Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais (Universidade Federal de Minas Gerais -UFMG), Belo Horizonte, MG, 31270‑901, Brazil
| | - Bruno P Melo
- Exercise Physiology Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais (Universidade Federal de Minas Gerais -UFMG), Belo Horizonte, MG, 31270‑901, Brazil
| | - Danusa D Soares
- Exercise Physiology Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais (Universidade Federal de Minas Gerais -UFMG), Belo Horizonte, MG, 31270‑901, Brazil.
| |
Collapse
|
32
|
Ren FF, Hillman CH, Wang WG, Li RH, Zhou WS, Liang WM, Yang Y, Chen FT, Chang YK. Effects of aerobic exercise on cognitive function in adults with major depressive disorder: A systematic review and meta-analysis. Int J Clin Health Psychol 2024; 24:100447. [PMID: 38371396 PMCID: PMC10869919 DOI: 10.1016/j.ijchp.2024.100447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/30/2024] [Indexed: 02/20/2024] Open
Abstract
Background Major Depressive Disorder (MDD) is a highly prevalent psychiatric disorder that impairs the cognitive function of individuals. Aerobic exercise stands out as a promising non-pharmacological intervention for enhancing cognitive function and promoting brain health.While positive impacts of aerobic exercise on executive function in adults with depression have been documented, a comprehensive understanding of its benefits on overall cognitive function, including memory, attention, and processing speed, along with key moderating factors in adults with MDD, remains unexplored. The purpose of the systematic review and meta-analysis was to investigate the effects of aerobic exercise on overall cognitive function in adults with MDD, and to explore whether cognitive sub-domains, aerobic exercise characteristics, and study and sample variables modify the effects of aerobic exercise on cognition. Methods Six English electronic databases (Embase, Cochrane Central, Scopus, APA PsycInfo, PubMed, Web of Science) were searched from inception to 2 April 2023. Randomized trials, including adults aged 18 years or above with a diagnosis of clinical depression, of the effects of aerobic exercise on cognitive function in adults with MDD compared to non-aerobic exercise groups were included. A three-level meta-analysis was conducted utilizing a random-effects model in R. The quality of the studies was evaluated using the Physiotherapy Evidence Database (PEDro) scale. The PROSPERO registration number is CRD42022367350. Results Twelve randomized trials including 945 adults with MDD were included. Results indicated that aerobic exercise significantly improved overall cognitive function (g = 0.21; 95 % confidence intervals [CI] = 0.07, 0.34), and the sub-domains of memory (g = 0.25; 95 % CI = 0.06, 0.44) and executive function (g = 0.12; 95 % CI = 0.04, 0.20). Significant benefits in cognitive function were found from moderate-to-vigorous (mixed) intensity (g = 0.19; 95 % CI = 0.02, 0.37), aerobic exercise conducted 3 times per week (g = 0.23; 95 % CI = 0.10, 0.38), in sessions < 45 min (g = 0.59; 95 % CI = 0.28, 0.90), and 45-60 min (g = 0.16; 95 % CI = 0.07, 0.26), in aerobic exercise intervention ≤ 12 weeks (g = 0. 26; 95 % CI = 0.08, 0.44). Limitations This review only included peer-reviewed English-language studies, which may lead to a language bias. The results of the Egger's test suggested a potential publication bias. Conclusions Aerobic exercise is efficacious in improving overall cognitive function and the sub-domains of memory and executive function in adults with major depressive disorder.
Collapse
Affiliation(s)
- Fei-Fei Ren
- Department of Physical Education, Beijing Language and Culture University, Beijing, China
| | - Charles H. Hillman
- Department of Psychology, Northeastern University, Boston, MA, USA
- Department of Physical Therapy, Movement, and Rehabilitation, Northeastern University, Boston, MA, USA
| | - Wei-Guang Wang
- Department of Physical Education, Beijing Language and Culture University, Beijing, China
| | - Ruei-Hong Li
- Department of Physical Education and Sport Sciences, National Taiwan Normal University, Taipei, Taiwan
| | - Wen-Sheng Zhou
- Department of Physical Education, Jiangsu Second Normal University, Jiangsu, China
| | - Wen-Ming Liang
- Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Yong Yang
- Laboratory of Kinesiology and Rehabilitation, School of Physical Education and Sport, Chaohu University, Anhui, China
| | - Feng-Tzu Chen
- Department of Kinesiology, National Tsing Hua University, Hsinchu, Taiwan
| | - Yu-Kai Chang
- Department of Physical Education and Sport Sciences, National Taiwan Normal University, Taipei, Taiwan
- Social Emotional Education and Development Center, National Taiwan Normal University, Taipei, Taiwan
- Institute for Research Excellence in Learning Science, National Taiwan Normal University, Taipei, Taiwan
| |
Collapse
|
33
|
Reggev N. Motivation and prediction-driven processing of social memoranda. Neurosci Biobehav Rev 2024; 159:105613. [PMID: 38437974 DOI: 10.1016/j.neubiorev.2024.105613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 12/09/2023] [Accepted: 02/28/2024] [Indexed: 03/06/2024]
Abstract
Social semantic memory guides many aspects of behavior. Individuals rely on acquired and inferred knowledge about personal characteristics and group membership to predict the behavior and character of social targets. These predictions then determine the expectations from, the behavior in, and the interpretations of social interactions. According to predictive processing accounts, mnemonic and attentional mechanisms should enhance the processing of prediction-violating events. However, empirical findings suggest that prediction-consistent social events are often better remembered. This mini-review integrates recent evidence from social and non-social memory research to highlight the role of motivation in explaining these discrepancies. A particular emphasis is given to the continuous nature of prediction-(in)consistency, the epistemic tendency of perceivers to maintain or update their knowledge, and the dynamic influences of motivation on multiple steps in prediction-driven social memory. The suggested framework provides a coherent outlook of existing work and offers promising future directions to better understand the ebb and flow of social memoranda.
Collapse
Affiliation(s)
- Niv Reggev
- Department of Psychology, Ben-Gurion University of the Negev, Beer Sheva, Israel; School of Brain and Cognitive Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.
| |
Collapse
|
34
|
Salsano I, Tain R, Giulietti G, Williams DP, Ottaviani C, Antonucci G, Thayer JF, Santangelo V. Negative emotions enhance memory-guided attention in a visual search task by increasing frontoparietal, insular, and parahippocampal cortical activity. Cortex 2024; 173:16-33. [PMID: 38354670 DOI: 10.1016/j.cortex.2023.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 08/18/2023] [Accepted: 12/12/2023] [Indexed: 02/16/2024]
Abstract
Previous literature demonstrated that long-term memory representations guide spatial attention during visual search in real-world pictures. However, it is currently unknown whether memory-guided visual search is affected by the emotional content of the picture. During functional magnetic resonance imaging (fMRI), participants were asked to encode the position of high-contrast targets embedded in emotional (negative or positive) or neutral pictures. At retrieval, they performed a visual search for targets presented at the same location as during encoding, but at a much lower contrast. Behaviorally, participants detected more accurately targets presented in negative pictures compared to those in positive or neutral pictures. They were also faster in detecting targets presented at encoding in emotional (negative or positive) pictures than in neutral pictures, or targets not presented during encoding (i.e., memory-guided attention effect). At the neural level, we found increased activation in a large circuit of regions involving the dorsal and ventral frontoparietal cortex, insular and parahippocampal cortex, selectively during the detection of targets presented in negative pictures during encoding. We propose that these regions might form an integrated neural circuit recruited to select and process previously encoded target locations (i.e., memory-guided attention sustained by the frontoparietal cortex) embedded in emotional contexts (i.e., emotional contexts recollection supported by the parahippocampal cortex and emotional monitoring supported by the insular cortex). Ultimately, these findings reveal that negative emotions can enhance memory-guided visual search performance by increasing neural activity in a large-scale brain circuit, contributing to disentangle the complex relationship between emotion, attention, and memory.
Collapse
Affiliation(s)
- Ilenia Salsano
- Functional Neuroimaging Laboratory, Santa Lucia Foundation IRCCS, Rome, Italy; PhD Program in Behavioral Neuroscience, Sapienza University of Rome, Rome, Italy.
| | - Rongwen Tain
- Campus Center of Neuroimaging, University of California, Irvine, CA, USA
| | - Giovanni Giulietti
- Functional Neuroimaging Laboratory, Santa Lucia Foundation IRCCS, Rome, Italy; SAIMLAL Department, Sapienza University of Rome, Rome, Italy
| | - DeWayne P Williams
- Department of Psychological Science, University of California, Irvine, Irvine, USA
| | | | - Gabriella Antonucci
- Department of Psychology, Sapienza University of Rome, Rome, Italy; Santa Lucia Foundation, IRCCS, Rome, Italy
| | - Julian F Thayer
- Department of Psychological Science, University of California, Irvine, Irvine, USA
| | - Valerio Santangelo
- Functional Neuroimaging Laboratory, Santa Lucia Foundation IRCCS, Rome, Italy; Department of Philosophy, Social Sciences & Education, University of Perugia, Perugia, Italy.
| |
Collapse
|
35
|
Costas-Insua C, Hermoso-López A, Moreno E, Montero-Fernández C, Álvaro-Blázquez A, Maroto IB, Sánchez-Ruiz A, Diez-Alarcia R, Blázquez C, Morales P, Canela EI, Casadó V, Urigüen L, Perea G, Bellocchio L, Rodríguez-Crespo I, Guzmán M. The CB 1 receptor interacts with cereblon and drives cereblon deficiency-associated memory shortfalls. EMBO Mol Med 2024; 16:755-783. [PMID: 38514794 PMCID: PMC11018632 DOI: 10.1038/s44321-024-00054-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 02/26/2024] [Accepted: 03/05/2024] [Indexed: 03/23/2024] Open
Abstract
Cereblon/CRBN is a substrate-recognition component of the Cullin4A-DDB1-Roc1 E3 ubiquitin ligase complex. Destabilizing mutations in the human CRBN gene cause a form of autosomal recessive non-syndromic intellectual disability (ARNSID) that is modelled by knocking-out the mouse Crbn gene. A reduction in excitatory neurotransmission has been proposed as an underlying mechanism of the disease. However, the precise factors eliciting this impairment remain mostly unknown. Here we report that CRBN molecules selectively located on glutamatergic neurons are necessary for proper memory function. Combining various in vivo approaches, we show that the cannabinoid CB1 receptor (CB1R), a key suppressor of synaptic transmission, is overactivated in CRBN deficiency-linked ARNSID mouse models, and that the memory deficits observed in these animals can be rescued by acute CB1R-selective pharmacological antagonism. Molecular studies demonstrated that CRBN interacts physically with CB1R and impairs the CB1R-Gi/o-cAMP-PKA pathway in a ubiquitin ligase-independent manner. Taken together, these findings unveil that CB1R overactivation is a driving mechanism of CRBN deficiency-linked ARNSID and anticipate that the antagonism of CB1R could constitute a new therapy for this orphan disease.
Collapse
Affiliation(s)
- Carlos Costas-Insua
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | - Alba Hermoso-López
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | - Estefanía Moreno
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology and Institute of Biomedicine of the University of Barcelona, University of Barcelona, 08028, Barcelona, Spain
| | - Carlos Montero-Fernández
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | - Alicia Álvaro-Blázquez
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | - Irene B Maroto
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | | | - Rebeca Diez-Alarcia
- Department of Pharmacology, University of the Basque Country/Euskal Herriko Unibertsitatea, 48940, Leioa, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029, Madrid, Spain
- BioBizkaia Health Research Institute, 48903, Barakaldo, Bizkaia, Spain
| | - Cristina Blázquez
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | - Paula Morales
- Instituto de Química Médica, CSIC, 28006, Madrid, Spain
| | - Enric I Canela
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology and Institute of Biomedicine of the University of Barcelona, University of Barcelona, 08028, Barcelona, Spain
| | - Vicent Casadó
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology and Institute of Biomedicine of the University of Barcelona, University of Barcelona, 08028, Barcelona, Spain
| | - Leyre Urigüen
- Department of Pharmacology, University of the Basque Country/Euskal Herriko Unibertsitatea, 48940, Leioa, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029, Madrid, Spain
- BioBizkaia Health Research Institute, 48903, Barakaldo, Bizkaia, Spain
| | | | - Luigi Bellocchio
- Institut National de la Santé et de la Recherche Médicale (INSERM) and University of Bordeaux, NeuroCentre Magendie, Physiopathologie de la Plasticité Neuronale, U1215, 33077, Bordeaux, France
| | - Ignacio Rodríguez-Crespo
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain
| | - Manuel Guzmán
- Department of Biochemistry and Molecular Biology, Instituto Universitario de Investigación Neuroquímica (IUIN), Complutense University, 28040, Madrid, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28029, Madrid, Spain.
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), 28034, Madrid, Spain.
| |
Collapse
|
36
|
Wang L, Yang J. The influence of repeated study and repeated testing on the testing effect and the transfer effect over time. Mem Cognit 2024; 52:476-490. [PMID: 37874486 DOI: 10.3758/s13421-023-01477-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2023] [Indexed: 10/25/2023]
Abstract
Many studies have shown that compared to the restudy condition (RS), retrieval practice (RP) enhances the long-retention memory of retrieved items (i.e., the testing effect), and facilitates later memory of non-retrieved but related items (i.e., the transfer effect). However, previous studies have usually used repeated study and repeated testing, which are included in study-testing cycles. Therefore, it is unclear to what extent the factors of repeated study and repeated testing influence testing and transfer effects over time. In this study, participants studied sentences that described various episodes, then tested a half subset of the original sentences under three conditions (RP, RS, control). After retention intervals of 10 min, 1 day and 7 days, they recalled all of the information in the sentences. The results showed that the testing effect was enhanced by repeated study or repeated testing, while the transfer effect occurred only after both repeated study and repeated testing. Furthermore, repeated study or repeated testing slowed down the forgetting of retrieved items, while the forgetting of non-retrieved items occurred after both repeated study and repeated testing. The testing effect increased over time, but the transfer effect remained relatively stable over time. These results clarified different roles of multiple study repetitions and testing opportunities in the testing effect and the transfer effect, and suggest that the repeated retrieval could be combined with repeated study to optimally promote long-term retention of the memory of tested and non-tested items.
Collapse
Affiliation(s)
- Lingwei Wang
- School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, People's Republic of China
| | - Jiongjiong Yang
- School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, People's Republic of China.
| |
Collapse
|
37
|
Jino K, Miyamoto K, Kanbara T, Unemura C, Horiguchi N, Ago Y. Allosteric inhibition of phosphodiesterase 4D induces biphasic memory-enhancing effects associated with learning-activated signaling pathways. Psychopharmacology (Berl) 2024; 241:805-816. [PMID: 38114603 DOI: 10.1007/s00213-023-06510-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 11/20/2023] [Indexed: 12/21/2023]
Abstract
RATIONALE Phosphodiesterase 4D negative allosteric modulators (PDE4D NAMs) enhance memory and cognitive function in animal models without emetic-like side effects. However, the relationship between increased cyclic adenosine monophosphate (cAMP) signaling and the effects of PDE4D NAM remains elusive. OBJECTIVE To investigate the roles of hippocampal cAMP metabolism and synaptic activation in the effects of D159687, a PDE4D NAM, under baseline and learning-stimulated conditions. RESULTS At 3 mg/kg, D159687 enhanced memory formation and consolidation in contextual fear conditioning; however, neither lower (0.3 mg/kg) nor higher (30 mg/kg) doses induced memory-enhancing effects. A biphasic (bell-shaped) dose-response effect was also observed in a scopolamine-induced model of amnesia in the Y-maze, whereas D159687 dose-dependently caused an emetic-like effect in the xylazine/ketamine anesthesia test. At 3 mg/kg, D159687 increased cAMP levels in the hippocampal CA1 region after conditioning in the fear conditioning test, but not in the home-cage or conditioning cage (i.e., context only). By contrast, 30 mg/kg of D159687 increased hippocampal cAMP levels under all conditions. Although both 3 and 30 mg/kg of D159687 upregulated learning-induced Fos expression in the hippocampal CA1 30 min after conditioning, 3 mg/kg, but not 30 mg/kg, of D159687 induced phosphorylation of synaptic plasticity-related proteins such as cAMP-responsive element-binding protein, synaptosomal-associated protein 25 kDa, and the N-methyl-D-aspartate receptor subunit NR2A. CONCLUSIONS Our findings suggest that learning-stimulated conditions can alter the effects of a PDE4D NAM on hippocampal cAMP levels and imply that a PDE4D NAM exerts biphasic memory-enhancing effects associated with synaptic plasticity-related signaling activation.
Collapse
Affiliation(s)
- Kohei Jino
- Laboratory for Drug Discovery and Disease Research, Shionogi Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-shi, Osaka, 561-0825, Japan
- Department of Cellular and Molecular Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan
| | - Keisuke Miyamoto
- Laboratory for Drug Discovery and Disease Research, Shionogi Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-shi, Osaka, 561-0825, Japan
| | - Tomoe Kanbara
- Laboratory for Drug Discovery and Disease Research, Shionogi Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-shi, Osaka, 561-0825, Japan
| | - Chie Unemura
- Laboratory for Drug Discovery and Disease Research, Shionogi Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-shi, Osaka, 561-0825, Japan
| | - Naotaka Horiguchi
- Laboratory for Drug Discovery and Disease Research, Shionogi Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka-shi, Osaka, 561-0825, Japan.
| | - Yukio Ago
- Department of Cellular and Molecular Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan.
| |
Collapse
|
38
|
Anderson BA. Trichotomy revisited: A monolithic theory of attentional control. Vision Res 2024; 217:108366. [PMID: 38387262 DOI: 10.1016/j.visres.2024.108366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/05/2024] [Accepted: 02/09/2024] [Indexed: 02/24/2024]
Abstract
The control of attention was long held to reflect the influence of two competing mechanisms of assigning priority, one goal-directed and the other stimulus-driven. Learning-dependent influences on the control of attention that could not be attributed to either of those two established mechanisms of control gave rise to the concept of selection history and a corresponding third mechanism of attentional control. The trichotomy framework that ensued has come to dominate theories of attentional control over the past decade, replacing the historical dichotomy. In this theoretical review, I readily affirm that distinctions between the influence of goals, salience, and selection history are substantive and meaningful, and that abandoning the dichotomy between goal-directed and stimulus-driven mechanisms of control was appropriate. I do, however, question whether a theoretical trichotomy is the right answer to the problem posed by selection history. If we reframe the influence of goals and selection history as different flavors of memory-dependent modulations of attentional priority and if we characterize the influence of salience as a consequence of insufficient competition from such memory-dependent sources of priority, it is possible to account for a wide range of attention-related phenomena with only one mechanism of control. The monolithic framework for the control of attention that I propose offers several concrete advantages over a trichotomy framework, which I explore here.
Collapse
Affiliation(s)
- Brian A Anderson
- Texas A&M University, Department of Psychological & Brain Sciences, 4235 TAMU, College Station, TX 77843-4235, United States.
| |
Collapse
|
39
|
Langston JL, Myers TM. Development and characterization of an automated behavioral assessment platform for the Göttingen minipig. Toxicol Lett 2024; 394:128-137. [PMID: 38428545 DOI: 10.1016/j.toxlet.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/07/2024] [Accepted: 02/21/2024] [Indexed: 03/03/2024]
Abstract
The Göttingen minipig is fast becoming the standard for assessing dermal chemical hazards because, like most swine, its skin is predictive of human skin response and because this strain's smaller size makes laboratory manipulations and husbandry easier. Unfortunately, standard behavioral tests and apparatus have not been developed for behavioral assessments of this swine strain. Indeed, computer-controlled automated behavioral testing procedures are much needed. The present research advanced this goal by producing a home-cage behavioral testing system that could accommodate minipigs of various sizes (ages). An aluminum frame housed three levers for recording operant responses, and LEDs above and below each lever served as discriminative stimuli. A commercially available food pellet dispenser was attached to a specialized pellet receptacle capable of measuring pellet retrieval. Two behavioral tests were selected and adapted from our commonly used non-human primate behavioral assessments: delayed match-to-sample (a memory test) and temporal response differentiation (a time-estimation test). Minipigs were capable of learning both tests and attaining stable performance. Next, scopolamine was used to validate the sensitivity of the behavioral tests for gauging behavioral perturbations in this swine strain. Scopolamine dose-effect functions were comparable to those observed in other species, including non-human primates, wherein 37.5 µg/kg of scopolamine (administered intramuscularly) reduced responding approximately 50%. Thus, we were successful in developing the apparatus and automated operant behavioral tests necessary to characterize drug safety in this swine strain. This capability will be valuable for characterizing chemical agent toxicity as well as the safety and efficacy of medical countermeasures.
Collapse
Affiliation(s)
- Jeffrey L Langston
- Pharmaceutical Sciences Department, Medical Toxicology Research Division, United States Army Medical Research Institute of Chemical Defense (USAMRICD), Aberdeen Proving Ground, MD, USA
| | - Todd M Myers
- Pharmaceutical Sciences Department, Medical Toxicology Research Division, United States Army Medical Research Institute of Chemical Defense (USAMRICD), Aberdeen Proving Ground, MD, USA.
| |
Collapse
|
40
|
Lopez MR, Wasberg SMH, Gagliardi CM, Normandin ME, Muzzio IA. Mystery of the memory engram: History, current knowledge, and unanswered questions. Neurosci Biobehav Rev 2024; 159:105574. [PMID: 38331127 DOI: 10.1016/j.neubiorev.2024.105574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/22/2023] [Accepted: 02/03/2024] [Indexed: 02/10/2024]
Abstract
The quest to understand the memory engram has intrigued humans for centuries. Recent technological advances, including genetic labelling, imaging, optogenetic and chemogenetic techniques, have propelled the field of memory research forward. These tools have enabled researchers to create and erase memory components. While these innovative techniques have yielded invaluable insights, they often focus on specific elements of the memory trace. Genetic labelling may rely on a particular immediate early gene as a marker of activity, optogenetics may activate or inhibit one specific type of neuron, and imaging may capture activity snapshots in a given brain region at specific times. Yet, memories are multifaceted, involving diverse arrays of neuronal subpopulations, circuits, and regions that work in concert to create, store, and retrieve information. Consideration of contributions of both excitatory and inhibitory neurons, micro and macro circuits across brain regions, the dynamic nature of active ensembles, and representational drift is crucial for a comprehensive understanding of the complex nature of memory.
Collapse
Affiliation(s)
- M R Lopez
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine and Science, Rochester, MN, United States
| | - S M H Wasberg
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - C M Gagliardi
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - M E Normandin
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA
| | - I A Muzzio
- Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA 52242, USA.
| |
Collapse
|
41
|
Heinen R, Bierbrauer A, Wolf OT, Axmacher N. Representational formats of human memory traces. Brain Struct Funct 2024; 229:513-529. [PMID: 37022435 PMCID: PMC10978732 DOI: 10.1007/s00429-023-02636-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 03/28/2023] [Indexed: 04/07/2023]
Abstract
Neural representations are internal brain states that constitute the brain's model of the external world or some of its features. In the presence of sensory input, a representation may reflect various properties of this input. When perceptual information is no longer available, the brain can still activate representations of previously experienced episodes due to the formation of memory traces. In this review, we aim at characterizing the nature of neural memory representations and how they can be assessed with cognitive neuroscience methods, mainly focusing on neuroimaging. We discuss how multivariate analysis techniques such as representational similarity analysis (RSA) and deep neural networks (DNNs) can be leveraged to gain insights into the structure of neural representations and their different representational formats. We provide several examples of recent studies which demonstrate that we are able to not only measure memory representations using RSA but are also able to investigate their multiple formats using DNNs. We demonstrate that in addition to slow generalization during consolidation, memory representations are subject to semantization already during short-term memory, by revealing a shift from visual to semantic format. In addition to perceptual and conceptual formats, we describe the impact of affective evaluations as an additional dimension of episodic memories. Overall, these studies illustrate how the analysis of neural representations may help us gain a deeper understanding of the nature of human memory.
Collapse
Affiliation(s)
- Rebekka Heinen
- Department of Neuropsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
| | - Anne Bierbrauer
- Department of Neuropsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
- Institute for Systems Neuroscience, Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - Oliver T Wolf
- Department of Cognitive Psychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Nikolai Axmacher
- Department of Neuropsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| |
Collapse
|
42
|
Kadian M, Saini N, Khera A, Kumar A. Neuroprotective mechanism of trans,trans-Farnesol in an ICV-STZ-induced rat model of Alzheimer's pathology. Inflammopharmacology 2024; 32:1545-1573. [PMID: 38308793 DOI: 10.1007/s10787-023-01413-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 12/13/2023] [Indexed: 02/05/2024]
Abstract
BACKGROUND Alzheimer's disease (AD) is a prominent cause of dementia, resulting in neurodegeneration and memory impairment. This condition imposes a considerable public health burden on both patients and their families due to the patients' functional impairments as well as the psychological and financial constraints. It has been well demonstrated that its aetiology involves proteinopathy, mitochondriopathies, and enhanced reactive oxygen species (ROS) generation, which are some of the key features of AD brains that further result in oxidative stress, excitotoxicity, autophagy, and mitochondrial dysfunction. OBJECTIVE The current investigation was created with the aim of elucidating the neurological defence mechanism of trans,trans-Farnesol (TF) against intracerebroventricular-streptozotocin (ICV-STZ)-induced Alzheimer-like symptoms and related pathologies in rodents. MATERIALS AND METHODS The current investigation involved male SD rats receiving TF (25-100 mg/kg, per oral) consecutively for 21 days in ICV-STZ-treated animals. An in silico study was carried out to explore the possible interaction between TF and NADH dehydrogenase and succinate dehydrogenase. Further, various behavioural (Morris water maze and novel object recognition test), biochemical (oxidants and anti-oxidant markers), activities of mitochondrial enzyme complexes and acetylcholinesterase (AChE), pro-inflammatory (tumor necrosis factor-alpha; TNF-α) levels, and histopathological studies were evaluated in specific brain regions. RESULTS Rats administered ICV-STZ followed by treatment with TF (25, 50, and 100 mg/kg) for 21 days had significantly better mental performance (reduced escape latency to access platform, extended time spent in target quadrant, and improved differential index) in the Morris water maze test and new object recognition test models when compared to control (ICV-STZ)-treated groups. Further, TF treatment significantly restored redox proportion, anti-oxidant levels, regained mitochondrial capacities, attenuated altered AChE action, levels of TNF-α, and histopathological alterations in certain brain regions in comparison with control. In in silico analysis, TF caused greater interaction with NADH dehydrogenase and succinate dehydrogenase. CONCLUSION The current work demonstrates the neuroprotective ability of TF in an experimental model with AD-like pathologies. The study further suggests that the neuroprotective impacts of TF may be related to its effects on TNF-α levels, oxidative stress pathways, and mitochondrial complex capabilities.
Collapse
Affiliation(s)
- Monika Kadian
- Pharmacology Division, University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study (UGC-CAS), Panjab University, Chandigarh, 160014, India
| | - Neetu Saini
- Pharmacology Division, University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study (UGC-CAS), Panjab University, Chandigarh, 160014, India
| | - Alka Khera
- Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Anil Kumar
- Pharmacology Division, University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study (UGC-CAS), Panjab University, Chandigarh, 160014, India.
| |
Collapse
|
43
|
Mazerolle M, Rotolo L, Maquestiaux F. Overcoming age differences in memory retrieval by reducing stereotype threat. Mem Cognit 2024; 52:622-631. [PMID: 37973771 DOI: 10.3758/s13421-023-01488-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2023] [Indexed: 11/19/2023]
Abstract
Very little is known about whether and how socioemotional factors influence age differences in associative memory. Here, we tested the hypothesis that reducing the threat induced by age-based stereotypes can reduce age differences in learning performance and strategy. Using an associative learning task, we replicated the classic finding of age differences under a high-threat condition: older adults had longer reaction times than younger adults and were much more reluctant to use memory retrieval. However, age differences were greatly diminished under a low-threat condition. These findings demonstrate that memory retrieval is an ability not entirely lost as individuals age because merely reducing stereotype threat helped restoring it. We conclude that socioemotional factors, such as stereotype threat, should be considered when evaluating younger and older adults' memory performance.
Collapse
Affiliation(s)
- Marie Mazerolle
- Université de Franche-Comté, LINC, MSHE, F-25000, Besançon, France.
| | - Lucas Rotolo
- Université de Franche-Comté, LINC, MSHE, F-25000, Besançon, France
| | - François Maquestiaux
- Université de Franche-Comté, LINC, MSHE, F-25000, Besançon, France
- Univ Rouen Normandie, Normandie Univ, CRFDP UR 7475, F-76000, Rouen, France
| |
Collapse
|
44
|
Yildirim Gökay N, Yücel E. Evaluation of language, attention, and memory skills in children with auditory brainstem implants. Eur Arch Otorhinolaryngol 2024; 281:1683-1692. [PMID: 37851114 DOI: 10.1007/s00405-023-08262-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/25/2023] [Indexed: 10/19/2023]
Abstract
PURPOSE This study aimed to evaluate attention, memory, and language skills in children with auditory brainstem implants and cochlear implants. METHODS This study included 20 children with auditory brainstem implants (ABI) and 20 cochlear implanted (CI) children between the ages of 6 years and 8 years 11 months and their families. "Test of Language Development: Primary (TOLD-P:4)" was used to assess language skills, "STROOP Test, Visual-Aural Digit Span (VADS) test, and Cancellation Test" were used to evaluate attention and memory skills. In addition, the functional outcomes of hearing skills in daily life were scored by "Auditory Behavior in Everyday Life (ABEL) scale". The significance level was determined as 0.05. RESULTS Children with ABI showed lower language skills than children with CI in terms of TOLD-P:4 language test scores, STROOP sub-test completion times, and the VADS and Cancellation test scores (p < 0.05). In addition, statistically significant correlations were found between language, attention, memory skills, and auditory behavior scale. CONCLUSIONS This study is one of the limited numbers of studies investigating cognitive processes in children with ABI. Since attention and memory are correlated with language skills, it is recommended that the development of cognition should be considered in follow-up and intervention approaches of children with ABI and/or CI.
Collapse
Affiliation(s)
- Nuriye Yildirim Gökay
- Department of Audiology, Gazi University Faculty of Health Sciences, 06745, Ankara, Turkey.
| | - Esra Yücel
- Department of Audiology, Hacettepe University, Faculty of Health Sciences, Ankara, Turkey
| |
Collapse
|
45
|
Chiang MK, Lin TC, Lin KH, Chang YC, Hsieh-Li HM, Lai DM. Hyperbaric Oxygen Therapy Attenuated the Motor Coordination and Cognitive Impairment of Polyglutamine Spinocerebellar Ataxia SCA17 Mice. Cerebellum 2024; 23:401-417. [PMID: 36943575 DOI: 10.1007/s12311-023-01548-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/14/2023] [Indexed: 03/23/2023]
Abstract
Spinocerebellar ataxias (SCAs) are a large and diverse group of autosomal-dominant neurodegenerative diseases. No drugs have been approved for these relentlessly progressive and fatal SCAs. Our previous studies indicate that oxidative stress, neuroinflammation, and neuronal apoptosis are elevated in the SCA17 mice, which are the main therapeutic targets of hyperbaric oxygen treatment (HBOT). HBOT is considered to be an alternative and less invasive therapy for SCAs. In this study, we evaluated the HBOT (2.2 ATA for 14 days) effect and the persistence for the management of SCA17 mice and their wild-type littermates. We found HBOT attenuated the motor coordination and cognitive impairment of SCA17 mice and which persisted for about 1 month after the treatment. The results of several biochemistry and liver/kidney hematoxylin and eosin staining show the HBOT condition has no obvious toxicity in the mice. Immunostaining analyses show that the neuroprotective effect of HBOT could be through the promotion of BDNF production and the amelioration of neuroinflammation. Surprisingly, HBOT executes different effects on the male and female SCA17 mice, including the reduction of neuroinflammation and activation of CaMKII and ERK. This study suggests HBOT is a potential alternative therapeutic treatment for SCA17. Accumulated findings have revealed the similarity in disease pathomechanisms and possible therapeutic strategies in polyQ diseases; therefore, HBOT could be an optional treatment as well as the other polyQ diseases.
Collapse
Affiliation(s)
- Meng-Ke Chiang
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Ta-Chun Lin
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | | | - Ya-Chin Chang
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Hsiu Mei Hsieh-Li
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan.
| | - Dar-Ming Lai
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan.
| |
Collapse
|
46
|
Gao M, Turner BM, Sloutsky VM. The Role of Attention in Category Representation. Cogn Sci 2024; 48:e13438. [PMID: 38605457 PMCID: PMC11018344 DOI: 10.1111/cogs.13438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 02/13/2024] [Accepted: 03/18/2024] [Indexed: 04/13/2024]
Abstract
Numerous studies have found that selective attention affects category learning. However, previous research did not distinguish between the contribution of focusing and filtering components of selective attention. This study addresses this issue by examining how components of selective attention affect category representation. Participants first learned a rule-plus-similarity category structure, and then were presented with category priming followed by categorization and recognition tests. Additionally, to evaluate the involvement of focusing and filtering, we fit models with different attentional mechanisms to the data. In Experiment 1, participants received rule-based category training, with specific emphasis on a single deterministic feature (D feature). Experiment 2 added a recognition test to examine participants' memory for features. Both experiments indicated that participants categorized items based solely on the D feature, showed greater memory for the D feature, were primed exclusively by the D feature without interference from probabilistic features (P features), and were better fit by models with focusing and at least one type of filtering mechanism. The results indicated that selective attention distorted category representation by highlighting the D feature and attenuating P features. To examine whether the distorted representation was specific to rule-based training, Experiment 3 introduced training, emphasizing all features. Under such training, participants were no longer primed by the D feature, they remembered all features well, and they were better fit by the model assuming only focusing but no filtering process. The results coupled with modeling provide novel evidence that while both focusing and filtering contribute to category representation, filtering can also result in representational distortion.
Collapse
Affiliation(s)
- Mengcun Gao
- Department of Psychology, The Ohio State University
| | | | | |
Collapse
|
47
|
Fernandes SM, Mendes AJ, Rodrigues PF, Conde A, Rocha M, Leite J. Efficacy and safety of repetitive Transcranial Magnetic Stimulation and transcranial Direct Current Stimulation in memory deficits in patients with Alzheimer's disease: Meta-analysis and systematic review. Int J Clin Health Psychol 2024; 24:100452. [PMID: 38444886 PMCID: PMC10914562 DOI: 10.1016/j.ijchp.2024.100452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/28/2024] [Indexed: 03/07/2024] Open
Abstract
Repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS) are two of the most used non-pharmacological interventions for Alzheimer's Disease (AD). However, most of the clinical trials have focused on evaluating the effects on global cognition and not on specific cognitive functions. Therefore, considering that memory loss is one of the hallmark symptoms of AD, we aim to assess the efficacy and safety of tDCS and rTMS in memory deficits. For that, multilevel random effect models were performed considering the standardized mean difference (SMD) between active and sham stimulation. A total of 19 studies with 411 participants demonstrated positive effects in memory after tDCS (SMD=0.20, p = 0.04) and rTMS (SMD=0.44, p = 0.001). Subgroup analysis revealed that tDCS had greater efficacy when administered in temporal regions (SMD=0.32, p = 0.04), whereas rTMS was superior when applied in frontal regions (SMD=0.61, p < 0.001). Therefore, depending on the brain region of stimulation, both interventions produced a positive effect on memory symptoms in AD patients. Finally, the safety of both techniques was observed in the AD population after the reporting of almost no serious events.
Collapse
Affiliation(s)
- Sara M. Fernandes
- CINTESIS@RISE, CINTESIS.UPT, Portucalense University, 4200-072 Porto, Portugal
| | - Augusto J. Mendes
- Laboratory of Neuroimaging of Aging (LANVIE), University of Geneva, Geneva, Switzerland
- Geneva Memory Center, Department of Rehabilitation and Geriatrics, Geneva University Hospitals, Geneva, Switzerland
| | | | - Ana Conde
- CINTESIS@RISE, CINTESIS.UPT, Portucalense University, 4200-072 Porto, Portugal
| | - Magda Rocha
- CINTESIS@RISE, CINTESIS.UPT, Portucalense University, 4200-072 Porto, Portugal
| | - Jorge Leite
- CINTESIS@RISE, CINTESIS.UPT, Portucalense University, 4200-072 Porto, Portugal
- Brain@Loop Lab
| |
Collapse
|
48
|
Morales-Calva F, Leal SL. Emotional modulation of memorability in mnemonic discrimination. Neurobiol Learn Mem 2024; 210:107904. [PMID: 38423168 DOI: 10.1016/j.nlm.2024.107904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 11/20/2023] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
Although elements such as emotion may serve to enhance or impair memory for images, some images are consistently remembered or forgotten by most people, an intrinsic characteristic of images known as memorability. Memorability explains some of the variability in memory performance, however, the underlying mechanisms of memorability remain unclear. It is known that emotional valence can increase the memorability of an experience, but how these two elements interact is still unknown. Hippocampal pattern separation, a computation that orthogonalizes overlapping experiences as distinct from one another, may be a candidate mechanism underlying memorability. However, these two literatures have remained largely separate. To explore the interaction between image memorability and emotion on pattern separation, we examined performance on an emotional mnemonic discrimination task, a putative behavioral correlate of hippocampal pattern separation, by splitting stimuli into memorable and forgettable categories as determined by a convolutional neural network as well as by emotion, lure similarity, and time of testing (immediately and 24-hour delay). We measured target recognition, which is typically used to determine memorability scores, as well as lure discrimination, which taxes hippocampal pattern separation and has not yet been examined within a memorability framework. Here, we show that more memorable images were better remembered across both target recognition and lure discrimination measures. However, for target recognition, this was only true upon immediate testing, not after a 24-hour delay. For lure discrimination, we found that memorability interacts with lure similarity, but depends on the time of testing, where memorability primarily impacts high similarity lure discrimination when tested immediately but impacts low similarity lure discrimination after a 24-hour delay. Furthermore, only lure discrimination showed an interaction between emotion and memorability, in which forgettable neutral images showed better lure discrimination compared to more memorable images. These results suggest that careful consideration is required of what makes an image memorable and may depend on what aspects of the image are more memorable (e.g., gist vs. detail, emotional vs. neutral).
Collapse
Affiliation(s)
- Fernanda Morales-Calva
- Department of Psychological Sciences, Rice University, BioScience Research Collaborative, Suite 780B, 6500 Main Street, Houston, TX 77030, USA
| | - Stephanie L Leal
- Department of Psychological Sciences, Rice University, BioScience Research Collaborative, Suite 780B, 6500 Main Street, Houston, TX 77030, USA.
| |
Collapse
|
49
|
Johnson HR, Scofield JE, Kostic B. The effect of color on license plate recall. Appl Ergon 2024; 118:104279. [PMID: 38565008 DOI: 10.1016/j.apergo.2024.104279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 03/20/2024] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
Previous research has shown there are particular patterns of license plate designs that are easier to recall. Missouri license plate patterns (AB1-C2D) somewhat diverge from what research suggests works best for recall. The current study examined whether incorporating color into license plates would improve recall, and also whether awareness or explanation of license plate formats would affect recall accuracy. Across two experiments, participants viewed license plate stimuli with and without color and attempted to recall them. The hypothesis was that incorporating color would improve recall, but the hypothesis was not supported. Results also did not show that prior exposure or explanation of formats affected accuracy. Future research should explore additional ways to improve license plate designs that would be easy to implement. Such improvements to license plate design would be useful because efforts to improve the public's awareness of formats would be expensive and likely ineffective.
Collapse
|
50
|
Valipour B, Simorgh S, Mirsalehi M, Moradi S, Taghizadeh-Hesary F, Seidkhani E, Akbarnejad Z, Alizadeh R. Improvement of spatial learning and memory deficits by intranasal administration of human olfactory ecto-mesenchymal stem cells in an Alzheimer's disease rat model. Brain Res 2024; 1828:148764. [PMID: 38242524 DOI: 10.1016/j.brainres.2024.148764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/14/2023] [Accepted: 01/09/2024] [Indexed: 01/21/2024]
Abstract
Mesenchymal stem cells therapy provides a new perspective of therapeutic approaches in the treatment of neurodegenerative diseases. The present study aimed to investigate the effects of intranasally transplanted human "olfactory ecto-mesenchymal stem cells" (OE-MSCs) in Alzheimer's disease (AD) rats. In this study, we isolated OE-MSCs from human olfactory lamina propria and phenotypically characterized them using immunocytochemistry and flow cytometry. The undifferentiated OE-MSCs were transplanted either by intranasal (IN) or intrahippocampal (IH) injection to rat models of AD, which were induced by injecting amyloid-beta (Aβ) intrahippocampally. Behavioral, histological, and molecular assessments were performed after a three-month recovery period. Based on the results, intranasal administration of OE-MSCs significantly reduced Aβ accumulation and neuronal loss, improved learning and memory impairments, and increased levels of BDNF (brain-derived neurotrophic factor) and NMDAR (N-methyl-D-Aspartate receptors) in the AD rat model. These changes were more significant in animals who received OE-MSCs by intranasal injection. The results of this study suggest that OE-MSCs have the potential to enhance cognitive function in AD, possibly mediated by BDNF and the NMDA receptors.
Collapse
Affiliation(s)
- Behnaz Valipour
- Department of Anatomical Sciences, Sarab Faculty of Medical Sciences, Sarab, Iran; Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sara Simorgh
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Marjan Mirsalehi
- ENT and Head and Neck Research Center and Department, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Salah Moradi
- Department of Life Science Engineering, Faculty of New Science and Technology, University of Tehran, Tehran, Iran
| | - Farzad Taghizadeh-Hesary
- ENT and Head and Neck Research Center and Department, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Elham Seidkhani
- Department of Anatomical Sciences, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Zeinab Akbarnejad
- ENT and Head and Neck Research Center and Department, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Rafieh Alizadeh
- ENT and Head and Neck Research Center and Department, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|