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Trevizani M, Leal LL, Rettore JVP, Macedo GC, Alves CCDS, de Castro SBR, do Carmo AMR, da Silva SA, Maranduba CMDC, Silva FDS. Tumor necrosis factor α, and agonist and antagonists of cannabinoid receptor type 1 and type 2 alter the immunophenotype of stem cells from human exfoliated deciduous teeth. EINSTEIN-SAO PAULO 2023; 21:eAO0405. [PMID: 37970951 PMCID: PMC10631756 DOI: 10.31744/einstein_journal/2023ao0405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/19/2023] [Indexed: 11/19/2023] Open
Abstract
OBJECTIVE To verify the involvement of the endocannabinoid system in the immunomodulatory profile of stem cells from human exfoliated deciduous teeth, in the presence or absence of TNF-α, and agonist and antagonists of CB1 and CB2. METHODS Stem cells from human exfoliated deciduous teeth were cultured in the presence or absence of an agonist, anandamide, and two antagonists, AM251 and SR144528, of CB1 and CB2 receptors, with or without TNF-α stimulation. For analysis of immunomodulation, surface molecules linked to immunomodulation, namely human leukocyte antigen-DR isotype (HLA-DR), and programmed death ligands 1 (PD-L1) and 2 (PD-L2) were measured using flow cytometry. RESULTS The inhibition of endocannabinoid receptors together with the proinflammatory effect of TNF-α resulted in increased HLA-DR expression in stem cells from human exfoliated deciduous teeth, as well as, in these cells acquiring an anti-inflammatory profile by enhancing the expression of PD-L1 and PD-L2. CONCLUSION Stem cells from human exfoliated deciduous teeth respond to the endocannabinoid system and TNF-α by altering key immune response molecules. Inhibition of endocannabinoid receptors and TNF-α led to an increase in HLA-DR, PD-L1, and PD-L2 levels in stem cells from human exfoliated deciduous teeth. This study shows the interaction between mesenchymal stromal cells and the immune and endocannabinoid systems.
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Affiliation(s)
- Marizia Trevizani
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - Laís Lopardi Leal
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - João Vitor Paes Rettore
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - Gilson Costa Macedo
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - Caio César de Souza Alves
- Faculdade de Medicina do MucuriUniversidade Federal dos Vales do Jequitinhonha e MucuriTeófilo OtoniMGBrazil Faculdade de Medicina do Mucuri , Universidade Federal dos Vales do Jequitinhonha e Mucuri , Teófilo Otoni , MG , Brazil .
| | - Sandra Bertelli Ribeiro de Castro
- Faculdade de Medicina do MucuriUniversidade Federal dos Vales do Jequitinhonha e MucuriTeófilo OtoniMGBrazil Faculdade de Medicina do Mucuri , Universidade Federal dos Vales do Jequitinhonha e Mucuri , Teófilo Otoni , MG , Brazil .
| | - Antônio Márcio Resende do Carmo
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - Silvioney Augusto da Silva
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - Carlos Magno da Costa Maranduba
- Instituto de Ciências BiológicasUniversidade Federal de Juiz de ForaJuiz de ForaMGBrazil Instituto de Ciências Biológicas , Universidade Federal de Juiz de Fora , Juiz de Fora , MG , Brazil .
| | - Fernando de Sá Silva
- Universidade Federal de Juiz de ForaGovernador ValadaresMGBrazil Universidade Federal de Juiz de Fora , Governador Valadares , MG , Brazil .
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Illesca-Matus R, Ardiles NM, Munoz F, Moya PR. Implications of Physical Exercise on Episodic Memory and Anxiety: The Role of the Serotonergic System. Int J Mol Sci 2023; 24:11372. [PMID: 37511128 PMCID: PMC10379296 DOI: 10.3390/ijms241411372] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023] Open
Abstract
There is a growing interest in investigating the effects of physical exercise on cognitive performance, particularly episodic memory. Similarly, an increasing number of studies in recent decades have studied the effects of physical activity on mood and anxiety disorders. Moreover, the COVID-19 pandemic has raised awareness of the importance of regular physical activity for both mental and physical health. Nevertheless, the exact mechanisms underlying these effects are not fully understood. Interestingly, recent findings suggest that the serotonergic system may play a key role in mediating the effects of physical exercise on episodic memory and anxiety. In this review, we discuss the impact of physical exercise on both episodic memory and anxiety in human and animal models. In addition, we explore the accumulating evidence that supports a role for the serotonergic system in the effects of physical exercise on episodic memory and anxiety.
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Affiliation(s)
- Ricardo Illesca-Matus
- Laboratorio de Neurodinámica Básica y Aplicada, Escuela de Psicología, Pontificia Universidad Católica de Chile, Santiago 8320000, Chile
- Centro de Investigación Avanzada en Educación (CIAE), Universidad de Chile, Santiago 8320000, Chile
| | - Nicolás M Ardiles
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2340000, Chile
- Instituto de Fisiología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2340000, Chile
| | - Felipe Munoz
- Programa de Doctorado en Ciencias e Ingeniería para la Salud, Universidad de Valparaíso, Valparaíso 2340000, Chile
- Instituto de Ciencias de la Salud, Universidad de O'Higgins, Rancagua 2820000, Chile
| | - Pablo R Moya
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2340000, Chile
- Instituto de Fisiología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2340000, Chile
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The Endocannabinoid System and Physical Exercise. Int J Mol Sci 2023; 24:ijms24031989. [PMID: 36768332 PMCID: PMC9916354 DOI: 10.3390/ijms24031989] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/20/2023] Open
Abstract
The endocannabinoid system (ECS) is involved in various processes, including brain plasticity, learning and memory, neuronal development, nociception, inflammation, appetite regulation, digestion, metabolism, energy balance, motility, and regulation of stress and emotions. Physical exercise (PE) is considered a valuable non-pharmacological therapy that is an immediately available and cost-effective method with a lot of health benefits, one of them being the activation of the endogenous cannabinoids. Endocannabinoids (eCBs) are generated as a response to high-intensity activities and can act as short-term circuit breakers, generating antinociceptive responses for a short and variable period of time. A runner's high is an ephemeral feeling some sport practitioners experience during endurance activities, such as running. The release of eCBs during sustained physical exercise appears to be involved in triggering this phenomenon. The last decades have been characterized by an increased interest in this emotional state induced by exercise, as it is believed to alleviate pain, induce mild sedation, increase euphoric levels, and have anxiolytic effects. This review provides information about the current state of knowledge about endocannabinoids and physical effort and also an overview of the studies published in the specialized literature about this subject.
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Bristot V, Poletto G, Pereira DMR, Hauck M, Schneider IJC, Aguiar AS. The effects of exercise on circulating endocannabinoid levels-a protocol for a systematic review and meta-analysis. Syst Rev 2022; 11:98. [PMID: 35585640 PMCID: PMC9115961 DOI: 10.1186/s13643-022-01980-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/12/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Increased circulating endocannabinoids levels are typically associated with aerobic exercise. This phenomenon is associated with a "runner's high," a state of euphoria and well-being experienced after a long exercise. We will provide in this review a transparent and standardized methodology following the PRISMA-P and Cochrane Handbook for Systematic Reviews of Interventions for conducting a systematic review and meta-analysis for synthesizing the available evidence about the effects of physical activity on the circulating levels of AEA and 2-AG endocannabinoids in healthy subjects. METHODS A multi-disciplinary team with basic and clinical expertise in exercise science developed this protocol. PubMed, EMBASE, Web of Science, CINAHL, SPORTDiscus, and Scopus will be the databases. A health sciences librarian was consulted in the development of the research. Search strategies will combine MeSH terms and free text words, including "exercise," "exercise, physical," "exercise training," "physical activity," "endocannabinoids," "2-arachidonoyl-glycerol," "glyceryl 2-arachidonate," "2-AG," "anandamide," "AEA," "n-arachidonoylethanolamide," "adult," "young adult," and "middle-aged." We will select experimental or quasi-experimental studies published through December 2021. The selection of studies, data extraction, assessment of the risk of bias, and the quality of evidence will be carried out in a paired and independent manner, and the consistency will be assessed using the statistics of Cohen Kappa. Methodological quality will be assessed using the Revised Cochrane risk of bias tool for randomized trials (RoB 2) and the Risk Of Bias In Nonrandomized Studies of Interventions (ROBINS-I) risk tool. We will use the Grading of Recommendations Assessment, Development, and Evaluation to assess the quality of the evidence, χ2 and I2 tests for heterogeneity, funnel plots, and the Egger test for publication bias. A meta-analysis for each data comparison will be performed whenever possible to determine the effect of physical activity on endocannabinoids' circulating levels. DISCUSSION This systematic review and meta-analysis will provide an overview of the evidence about physical activity over AEA and 2-AG endocannabinoids, including comparability of variables between studies, critical interpretation of results, and use of accurate statistical techniques. The endocannabinoid is molecules by which muscles communicate with other tissues and organs, mediating the beneficial effects of exercise on health and performance, including increased glucose uptake, improved insulin action, and mitochondrial biogenesis. They are essential to exercise. Thus, this study will review the acute effect of physical exercise on circulating levels of endocannabinoids in healthy individuals. The results of this study will potentially be transferred to doctors, health professionals, and legislators to guide their decision making, as well as will improve future research. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42020202886 .
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Affiliation(s)
- Viviane Bristot
- LABIOEX-Exercise Biology Lab, Department of Health Sciences, UFSC-Federal University of Santa Catarina, Araranguá, SC Brazil
| | - Giorgio Poletto
- LABIOEX-Exercise Biology Lab, Department of Health Sciences, UFSC-Federal University of Santa Catarina, Araranguá, SC Brazil
| | | | - Melina Hauck
- LABIOEX-Exercise Biology Lab, Department of Health Sciences, UFSC-Federal University of Santa Catarina, Araranguá, SC Brazil
| | - Ione Jayce Ceola Schneider
- LABEPI-Epidemiology Lab, Health Science Department and Rehabilitation Post-graduate Program, UFSC-Federal University of Santa Catarina, Araranguá, Santa Catarina Brazil
| | - Aderbal S. Aguiar
- LABIOEX-Exercise Biology Lab, Department of Health Sciences, UFSC-Federal University of Santa Catarina, Araranguá, SC Brazil
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Carreira LD, Matias FC, Campos MG. Clinical Data on Canabinoids: Translational Research in the Treatment of Autism Spectrum Disorders. Biomedicines 2022; 10:biomedicines10040796. [PMID: 35453548 PMCID: PMC9024565 DOI: 10.3390/biomedicines10040796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/23/2022] [Accepted: 03/25/2022] [Indexed: 12/11/2022] Open
Abstract
Translational research made with Cannabis sativa L. and its biocompounds provides data for some targeted diseases, as also symptoms associated with Autism Spectrum Disorders (ASDs). The main compounds ∆9-tetrahydrocannabinol (THC) and cannabidiol (CBD), are capable of modulating the endocannabinoid system since its dysregulation interferes with the pathophysiology of ASDs there are clinical evidence for its potential use in the treatment of the disease. Conventional therapy still has limitations, as it does not always treat the central symptoms, and there are many patients who do not respond to treatment, which demands more research on new therapies. Through the analysis of published literature on this topic, it is verified that cannabinoids, in particular CBD, improves symptoms associated with common comorbidities in ASDs. Some studies also demonstrate the therapeutic potential of these compounds in the treatment of central symptoms of autism. In addition, cannabinoid therapy to ASDs is associated with low adverse effects and a reduction in concomitant medication. Although it appears to be promising, it is essential to do the translation of this data into clinical research and some of its potential and critical gaps are discussed in this review pointing to large-scale and long-term clinical trials that should include more patients and homogeneous samples.
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Affiliation(s)
- Laura D. Carreira
- Observatory of Drug-Herb Interactions, Faculty of Pharmacy, Health Sciences Campus, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal;
| | - Francisca C. Matias
- Coimbra Institute for Biomedical Imaging and Translational Research, Institute of Nuclear Sciences Applied to Health (ICNAS), Health Sciences Campus, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal;
| | - Maria G. Campos
- Observatory of Drug-Herb Interactions, Faculty of Pharmacy, Health Sciences Campus, University of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal;
- Coimbra Chemistry Centre (CQC, FCT Unit 313) (FCTUC), University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
- Correspondence: ; Tel.: +351-239-488-400
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Bailone RL, Fukushima HCS, de Aguiar LK, Borra RC. The endocannabinoid system in zebrafish and its potential to study the effects of Cannabis in humans. Lab Anim Res 2022; 38:5. [PMID: 35193700 PMCID: PMC8862295 DOI: 10.1186/s42826-022-00116-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 02/14/2022] [Indexed: 12/19/2022] Open
Abstract
Zebrafish is considered an unprecedented animal model in drug discovery. A review of the literature presents highlights and elucidates the biological effects of chemical components found in Cannabis sativa. Particular attention is paid to endocannabinoid system (eCB) and its main receptors (CB1 and CB2). The zebrafish model is a promising one for the study of cannabinoids because of the many similarities to the human system. Despite the recent advances on the eCB system, there is still the need to elucidate some of the interactions and, thus, the zebrafish model can be used for that purpose as it respects the 3Rs concept and reduced time and costs. In view of the relevance of cannabinoids in the treatment and prevention of diseases, as well as the importance of the zebrafish animal model in elucidating the biological effects of new drugs, the aim of this study was to bring to light information on the use of the zebrafish animal model in testing C. sativa-based medicines.
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Acute and Chronic Exercise Effects on Human Memory: What We Know and Where to Go from Here. J Clin Med 2021; 10:jcm10214812. [PMID: 34768329 PMCID: PMC8584999 DOI: 10.3390/jcm10214812] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 10/03/2021] [Indexed: 01/23/2023] Open
Abstract
Although the acquisition, storage, and retrieval of memories was once thought to happen within a single memory system with multiple processes operating on it, it is now believed that memory is comprised of both distinct and interacting brain systems [...].
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Cannabis: Neuropsychiatry and Its Effects on Brain and Behavior. Brain Sci 2020; 10:brainsci10110834. [PMID: 33182671 PMCID: PMC7696812 DOI: 10.3390/brainsci10110834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 11/09/2020] [Indexed: 02/07/2023] Open
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Charytoniuk T, Zywno H, Konstantynowicz-Nowicka K, Berk K, Bzdega W, Chabowski A. Can Physical Activity Support the Endocannabinoid System in the Preventive and Therapeutic Approach to Neurological Disorders? Int J Mol Sci 2020; 21:E4221. [PMID: 32545780 PMCID: PMC7352563 DOI: 10.3390/ijms21124221] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 12/14/2022] Open
Abstract
The worldwide prevalence of neurological and neurodegenerative disorders, such as depression or Alzheimer's disease, has spread extensively throughout the last decades, becoming an enormous health issue. Numerous data indicate a distinct correlation between the altered endocannabinoid signaling and different aspects of brain physiology, such as memory or neurogenesis. Moreover, the endocannabinoid system is widely regarded as a crucial factor in the development of neuropathologies. Thus, targeting those disorders via synthetic cannabinoids, as well as phytocannabinoids, becomes a widespread research issue. Over the last decade, the endocannabinoid system has been extensively studied for its correlation with physical activity. Recent data showed that physical activity correlates with elevated endocannabinoid serum concentrations and increased cannabinoid receptor type 1 (CB1R) expression in the brain, which results in positive neurological effects including antidepressant effect, ameliorated memory, neuroplasticity development, and reduced neuroinflammation. However, none of the prior reviews presented a comprehensive correlation between physical activity, the endocannabinoid system, and neuropathologies. Thus, our review provides a current state of knowledge of the endocannabinoid system, its action in physical activity, as well as neuropathologies and a possible correlation between all those fields. We believe that this might contribute to finding a new preventive and therapeutic approach to both neurological and neurodegenerative disorders.
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Affiliation(s)
- Tomasz Charytoniuk
- Department of Physiology, Medical University of Bialystok, 15-089 Białystok, Poland; (H.Z.); (K.K.-N.); (K.B.); (W.B.); (A.C.)
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Moosavi Sohroforouzani A, Shakerian S, Ghanbarzadeh M, Alaei H. Treadmill exercise improves LPS-induced memory impairments via endocannabinoid receptors and cyclooxygenase enzymes. Behav Brain Res 2020; 380:112440. [DOI: 10.1016/j.bbr.2019.112440] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 12/14/2019] [Accepted: 12/15/2019] [Indexed: 12/27/2022]
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Lv W, Wang X, Liu J, Yu P. Eight-Section Brocade Exercises Improve the Sleep Quality and Memory Consolidation and Cardiopulmonary Function of Older Adults With Atrial Fibrillation-Associated Stroke. Front Psychol 2019; 10:2348. [PMID: 31695645 PMCID: PMC6818461 DOI: 10.3389/fpsyg.2019.02348] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 10/02/2019] [Indexed: 12/21/2022] Open
Abstract
Purpose: Poor sleep quality is harmful for everyone and potentially even more harmful for older adults with atrial fibrillation-associated stroke (AFAS). This study aims to explore the effects of eight-section brocade (ESB) on sleep quality, memory, and cardiopulmonary function in the older adults with AFAS. Methods: Older adults with AFAS and sleep disorders were recruited and divided into the ESB (EG, n = 85) and control groups (CG, general exercise, n = 85). EG patients received 60 min ESB exercises 5 times a week for 12 weeks; CG patients received normal exercise. Pittsburgh sleep quality index (PSQI) scores (poor sleepers ≥8 and normal sleepers < 8), memory for word pairs (poor memory ≤ 7 and normal memory > 7), left ventricular posterior wall (LVPW) thickness, and maximum ventilation (MV, to evaluate cardiopulmonary function) values were measured. The correlation between sleep and memory quality was analyzed using PSQI scores and word pairs via the Pearson correlation coefficients test. Adjusted Cox models were used to explore an interaction between PSQI and ESB exercise. Results: After 12-week exercise intervention, ESB improved sleep quality, latency, duration, disturbance and daytime dysfunction when compared to conventional exercise. In similar cases, the MV values in the EG were also higher than that in the CG (p = 0.009). ESB intervention could not affect the cardiac structure and left ventricular ejection fraction. Compared with the CG, the ESB intervention reduced PSQI scores and increased memorized word pairs (p < 0.001 for poor and normal sleepers in both unadjusted and adjusted analysis, p = 0.012 and 0.003 for poor and normal memory). The test of Pearson correlation coefficients showed that PSQI scores were strongly associated with the number of word pairs in both unadjusted and adjusted analyses (p < 0.0001). Conclusion: Eight-section brocade exercise improved sleep quality and memory consolidation and cardiopulmonary function by reducing PSQI scores, increasing word pairs and MV values in the older adults with AFAS.
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Affiliation(s)
- Wei Lv
- Department of Cadre Ward, The First Hospital of Jilin University, Changchun, China
| | - Xinxin Wang
- Department of Cadre Ward, The First Hospital of Jilin University, Changchun, China
| | - Jia Liu
- Department of Cardiovascular Medicine, The First Hospital of Jilin University, Changchun, China
| | - Ping Yu
- Department of Cardiovascular Medicine, The First Hospital of Jilin University, Changchun, China
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Dilley EK, Zou L, Loprinzi PD. The effects of acute exercise intensity on episodic and false memory among young adult college students. Health Promot Perspect 2019; 9:143-149. [PMID: 31249802 PMCID: PMC6588806 DOI: 10.15171/hpp.2019.20] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 03/27/2019] [Indexed: 12/11/2022] Open
Abstract
Background: Previous experimental work demonstrates that acute exercise may enhance episodic memory performance. However, limited research has examined the extent to which acute exercise influences false episodic memory production, and no studies, to date, have examined whether there is an intensity-specific effect of acute exercise on both true episodic and false episodic memories. Thus, the present experiment evaluated the effects of intensity-specific acute exercise on episodic memory and false episodic memory. Methods: A three-arm, parallel, between-group randomized controlled trial was employed in the University setting, with participants (N=60; Mage= 20.8 years) randomized into a moderate intensity exercise group (15-minute bout of treadmill exercise at 50% heart rate reserve), a high intensity exercise group (15-minute bout of treadmill exercise at 80% heart rate reserve), or a control group (time-matched period of sitting). True episodic and false episodic memory were both assessed using 6 word-lists from the Deese-Roediger-McDermott (DRM) paradigm, including both a short-term recall and a delayed memory recognition assessment. Results: For the number of words recalled across each of the 6 lists, there was a significant main effect for list (P<0.001, η2 p=0.15), marginally significant main effect for group (P=0.07, η2 p=0.09), but no list by group interaction effect (P=0.44, η2 p=0.03). Those in the high-intensity exercise group recalled significantly (P<0.05) more words than the control group. For the false episodic word recall, across various lists, high-intensity acute exercise was associated with a greater rate of false episodic memories. For the memory recognition task, there was no main effect for word type (P=0.46, η2 p=0.01), group (P=0.4443, η2 p=.03), word type by group interaction (P=0.44,η2 p=0.03), recall by group interaction (P=0.4441, η2 p=0.04), or word type by recall by group interaction (P=0.32, η2 p=0.04). However, there was a main effect for recall (P<0.001, η2 p=.54)and a word type by recall interaction (P<0.001, η2 p=0.77). Conclusion: These findings suggest that acute high-intensity exercise may enhance true episodic memories, and, possibly, also increase the rate of false episodic memories. We discuss these findings in the context of how different acute exercise intensities may have unique and differential effects on underlying mechanistic processes related to true and false episodic memory.
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Affiliation(s)
- Emma K Dilley
- Exercise & Memory Laboratory, Department of Health, Exercise Science and Recreation Management, The University of Mississippi, University, MS 38677, USA
| | - Liye Zou
- Lifestyle (Mind-Body Movement) Research Center, College of Sport Science, Shenzhen University, Shenzhen 518060, China
| | - Paul D Loprinzi
- Exercise & Memory Laboratory, Department of Health, Exercise Science and Recreation Management, The University of Mississippi, University, MS 38677, USA
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