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Wang J, Huang C, Luo G, Xiao Y, Guo G, Quan D, Zheng H. Reduced sleep quality defines a subtype of obsessive-compulsive disorder with lower Glx levels in the resting thalamus and worse response inhibition. J Psychiatr Res 2024; 173:14-24. [PMID: 38461674 DOI: 10.1016/j.jpsychires.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/29/2024] [Accepted: 03/04/2024] [Indexed: 03/12/2024]
Abstract
BACKGROUND The aim of this study was to investigate the differences between resting and active thalamic neurometabolite levels and inhibitory function in obsessive compulsive disorder (OCD) patients with poor sleep quality (PSQ was defined as Pittsburgh Sleep Quality Index >5 and sleep efficiency ≤85%) compared to OCD patients with good sleep quality (GSQ) and healthy controls (HCs), as well as the relationship of these indices to obsessive compulsive symptoms. METHODS Functional magnetic resonance spectroscopy (fMRS) was used to measure resting and active thalamic neurometabolite levels in 72 subjects (20 HCs and 38 OCD patients included in study analysis). Response inhibition function was measured by the Go-Nogo task before and during MRS recording. Subjective sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI). The symptoms of OCD, anxiety and depression were evaluated using relevant clinical scales. RESULTS OCD patients exhibited significantly reduced Glx/Cr levels in the resting thalamus. The levels of resting thalamic Glu/Cr and Glx/Cr in OCD patients with PSQ were significantly lowest. OCD patients had significantly lower correct rates on Go tasks, higher error rates on Nogo tasks, and longer error average response times (EART) to the Nogo task. OCD patients with PSQ demonstrated the highest Nogo task error rate and the longest EART to Nogo task. Furthermore, PSQI scores exhibited negative correlations with Glu/Cr and Glx/Cr in the resting thalamus. CONCLUSION OCD patients with PSQ demonstrated reduced levels of thalamic resting Glx and more pronounced response inhibitory function impairment. Aberrant neurometabolite levels in critical brain regions, coupled with heightened response inhibition function deficits, may be a neurobiological basis for the PSQ that OCD patients generally exhibit.
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Affiliation(s)
- Jian Wang
- Guangdong Mental Health Center, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510180, China; School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Cigui Huang
- Guangdong Mental Health Center, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510180, China; The Second Clinical School of Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Guowei Luo
- Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, China
| | - Yuqing Xiao
- Guangdong Mental Health Center, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510180, China; The Second Clinical School of Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Guangquan Guo
- Guangdong Mental Health Center, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510180, China
| | - Dongming Quan
- Guangdong Mental Health Center, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510180, China
| | - Huirong Zheng
- Guangdong Mental Health Center, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510180, China; School of Medicine, South China University of Technology, Guangzhou, 510006, China; The Second Clinical School of Medicine, Southern Medical University, Guangzhou, 510515, China.
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Oh H, Berrington A, Auer DP, Babourina-Brooks B, Faas H, Jung JY. A preliminary study of dynamic neurochemical changes in the dorsolateral prefrontal cortex during working memory. Eur J Neurosci 2024; 59:2075-2086. [PMID: 38409515 DOI: 10.1111/ejn.16280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 01/28/2024] [Accepted: 01/30/2024] [Indexed: 02/28/2024]
Abstract
Working memory (WM) is one of the fundamental cognitive functions associated with the dorsolateral prefrontal cortex (DLPFC). However, the neurochemical mechanisms of WM, including the dynamic changes in neurometabolites such as glutamate and GABA in the DLPFC, remain unclear. Here, we investigated WM-related glutamate and GABA changes, alongside hemodynamic responses in the DLPFC, using a combination of functional magnetic resonance spectroscopy (fMRS) and functional magnetic resonance imaging (fMRI). During a WM task, we measured Glx (glutamate + glutamine) and GABA levels using GABA editing MEscher-GArwood Point REsolved Spectroscopy (MEGA-PRESS) sequence and blood-oxygen-level-dependent (BOLD) signal changes. In the DLPFC, we observed elevated Glx levels and increased BOLD signal changes during a 2-back task. Specifically, the Glx levels in the DLPFC were significantly higher during the 2-back task compared with fixation, although this difference was not significant when compared with a 0-back task. However, Glx levels during the 0-back task were higher than during fixation. Furthermore, there was a positive correlation between Glx levels in the DLPFC during the 2-back task and the corresponding BOLD signal changes. Notably, higher Glx increases were associated with increased DLPFC activation and lower WM task performance in individuals. No notable changes in DLPFC GABA levels were observed during WM processing. These findings suggest that the modulation of glutamatergic activity in the DLPFC may play a crucial role in both working memory processing and its associated performance outcomes.
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Affiliation(s)
- Hyerin Oh
- Mental Health & Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, UK
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, UK
| | - Adam Berrington
- Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, UK
| | - Dorothee P Auer
- Mental Health & Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, UK
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, UK
- NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, University of Nottingham, Nottingham, UK
| | - Ben Babourina-Brooks
- Mental Health & Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, UK
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, UK
- NIHR Nottingham Biomedical Research Centre, Queen's Medical Centre, University of Nottingham, Nottingham, UK
| | - Henryk Faas
- Mental Health & Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, UK
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, UK
| | - Je Young Jung
- School of Psychology, University of Nottingham, Nottingham, UK
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Liang Y, Peng X, Meng Y, Liu Y, Zhu Q, Xu Z, Yang J. Effect of acute stress on working memory in pilots: Investigating the modulatory role of memory load. PLoS One 2024; 19:e0288221. [PMID: 38271465 PMCID: PMC10810460 DOI: 10.1371/journal.pone.0288221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 12/07/2023] [Indexed: 01/27/2024] Open
Abstract
Many practitioners, such as pilots, frequently face working memory (WM) demands under acute stress environments, while the effect of acute stress on WM has not been conclusively studied because it is moderated by a variety of factors. The current study investigated how acute stress affects pilots' WM under different memory load conditions. There are 42 pilots conducting the experiments, consisting of 21 stress group participants experiencing the Trier Social Stress Test (TSST) and 21 control group participants experiencing the controlled TSST (C-TSST). Subsequently, both groups performed N-back tasks under three memory load conditions (0-back, 1-back, and 2-back). State Anxiety Inventory (S-AI), heart rate (HR), and salivary cortisol concentrations (SCC) were collected to analyze acute stress induction. The results revealed that (1) the TSST could effectively induce acute stress with higher S-AI, HR, and SCC; (2) higher memory load reduces WM accuracy (ACC) and delays response times (RT); (3) acute stress increases WM ACC under moderate load conditions (1-back task). These results suggest that acute stress may not necessarily impair WM and even improve WM performance under certain memory load conditions. Potential mechanisms of acute stress effects on WM and alternative explanations for the modulatory role of memory load consistent with the emotion and motivation regulation theory are discussed. These findings not only provide insight into the field of acute stress and WM but are also beneficial for pilot training and the development of stress management strategies.
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Affiliation(s)
- Yaowei Liang
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
| | - Xing Peng
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
| | - Yu Meng
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
| | - Yueying Liu
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
| | - Qi Zhu
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
| | - Zhi Xu
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
| | - Jiazhong Yang
- Institute of Aviation Human Factors and Cognitive Neuroscience, College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan, China
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Paltoglou G, Stefanaki C, Chrousos GP. Functional MRI Techniques Suggesting that the Stress System Interacts with Three Large Scale Core Brain Networks to Help Coordinate the Adaptive Response: A Systematic Review. Curr Neuropharmacol 2024; 22:976-989. [PMID: 37533249 PMCID: PMC10845086 DOI: 10.2174/1570159x21666230801151718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/16/2023] [Accepted: 04/06/2023] [Indexed: 08/04/2023] Open
Abstract
OBJECTIVE Synthesis of functional MRI (fMRI) and functional connectivity (FC) analysis data on human stress system (SS) function, as it relates to the dynamic function of the Salience (SN), Default Mode (DMN) and Central Executive (CEN) networks. METHODS Systematic search of Medline, Scopus, Clinical Trials.gov, and Google Scholar databases of studies published prior to September 2022 resulted in 28 full-text articles included for qualitative synthesis. RESULTS Acute stress changes the states of intra-/inter- neural network FCs and activities from those of resting, low arousal state in the SN, DMN and CEN, during which intra- and inter-network FCs and activities of all three networks are low. SS activation is positively linked to the activity of the SN and negatively to that of the DMN, while, in parallel, it is associated with an initial decrease and a subsequent increase of the intra- network FC and activity of the CEN. The FC between the DMN and the CEN increases, while those between the SN and the CEN decrease, allowing time for frontal lobe strategy input and "proper" CEN activity and task decision. SN activation is linked to sensory hypersensitivity, "impaired" memory, and a switch from serial to parallel processing, while trait mindfulness is associated with FC changes promoting CEN activity and producing a "task-ready state". CONCLUSION SS activation is tightly connected to that of the SN, with stress hormones likely potentiating the intra-network FC of the latter, attenuating that of the DMN, and causing a biphasic suppression- to-activation response of the CEN, all adaptive changes favoring proper decisions and survival.
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Affiliation(s)
- George Paltoglou
- University Research Institute of Maternal and Child Health and Precision Medicine, Medical School, National and Kapodistrian University of Athens, “Aghia Sophia” Children's Hospital, Athens 11527, Greece
- Second Department of Pediatrics, School of Medicine, National and Kapodistrian University of Athens, “A. & P. Kyriakou” Children's Hospital, Athens 11527, Greece
- UNESCO Chair on Adolescent Health Care, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - Charikleia Stefanaki
- University Research Institute of Maternal and Child Health and Precision Medicine, Medical School, National and Kapodistrian University of Athens, “Aghia Sophia” Children's Hospital, Athens 11527, Greece
- UNESCO Chair on Adolescent Health Care, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
| | - George P. Chrousos
- University Research Institute of Maternal and Child Health and Precision Medicine, Medical School, National and Kapodistrian University of Athens, “Aghia Sophia” Children's Hospital, Athens 11527, Greece
- UNESCO Chair on Adolescent Health Care, Medical School, National and Kapodistrian University of Athens, Athens 11527, Greece
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Crawford LS, Mills EP, Peek A, Macefield VG, Keay KA, Henderson LA. Function and biochemistry of the dorsolateral prefrontal cortex during placebo analgesia: how the certainty of prior experiences shapes endogenous pain relief. Cereb Cortex 2023; 33:9822-9834. [PMID: 37415068 PMCID: PMC10472490 DOI: 10.1093/cercor/bhad247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/15/2023] [Accepted: 06/17/2023] [Indexed: 07/08/2023] Open
Abstract
Prior experiences, conditioning cues, and expectations of improvement are essential for placebo analgesia expression. The dorsolateral prefrontal cortex is considered a key region for converting these factors into placebo responses. Since dorsolateral prefrontal cortex neuromodulation can attenuate or amplify placebo, we sought to investigate dorsolateral prefrontal cortex biochemistry and function in 38 healthy individuals during placebo analgesia. After conditioning participants to expect pain relief from a placebo "lidocaine" cream, we collected baseline magnetic resonance spectroscopy (1H-MRS) at 7 Tesla over the right dorsolateral prefrontal cortex. Following this, functional magnetic resonance imaging scans were collected during which identical noxious heat stimuli were delivered to the control and placebo-treated forearm sites. There was no significant difference in the concentration of gamma-aminobutyric acid, glutamate, Myo-inositol, or N-acetylaspartate at the level of the right dorsolateral prefrontal cortex between placebo responders and nonresponders. However, we identified a significant inverse relationship between the excitatory neurotransmitter glutamate and pain rating variability during conditioning. Moreover, we found placebo-related activation within the right dorsolateral prefrontal cortex and altered functional magnetic resonance imaging coupling between the dorsolateral prefrontal cortex and the midbrain periaqueductal gray, which also correlated with dorsolateral prefrontal cortex glutamate. These data suggest that the dorsolateral prefrontal cortex formulates stimulus-response relationships during conditioning, which are then translated to altered cortico-brainstem functional relationships and placebo analgesia expression.
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Affiliation(s)
- Lewis S Crawford
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, Sydney 2006, Australia
| | - Emily P Mills
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, Sydney 2006, Australia
| | - A Peek
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, Sydney 2006, Australia
| | | | - Kevin A Keay
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, Sydney 2006, Australia
| | - Luke A Henderson
- School of Medical Sciences (Neuroscience), Brain and Mind Centre, University of Sydney, Sydney 2006, Australia
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Fricke K, Alexander N, Jacobsen T, Krug H, Wehkamp K, Vogel S. The effects of hydrocortisone and yohimbine on human behavior in approach-avoidance conflicts. Psychopharmacology (Berl) 2023; 240:1705-1717. [PMID: 37314480 PMCID: PMC10265560 DOI: 10.1007/s00213-023-06396-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 05/31/2023] [Indexed: 06/15/2023]
Abstract
RATIONALE Balancing approach of positive and avoidance of negative stimuli is essential when faced with approach-avoidance conflicts, e.g., situations with both positive and negative outcomes. This balance is disturbed in several mental disorders, e.g., excessive avoidance in anxiety disorders, and heightened approach in substance use disorders. Since stress is assumed to impact these disorders' etiology and maintenance, it seems crucial to understand how stress influences behavior in approach-avoidance conflicts. Indeed, some studies suggested altered approach-avoidance behavior under acute stress, but the mechanism underlying these effects is unknown. OBJECTIVES Investigate how the pharmacological manipulation of major stress mediators (cortisol and noradrenaline) influences task-based approach-avoidance conflict behavior in healthy individuals. METHODS Ninety-six participants (48 women, 48 men) received either 20mg hydrocortisone, 20mg yohimbine, both, or placebo before performing a task targeting foraging under predation in a fully crossed double-blind between-subject design. Moreover, we investigated effects of gender and endogenous testosterone and estradiol levels on approach-avoidance behavior. RESULTS While biological stress markers (cortisol concentration, alpha amylase activity) indicated successful pharmacological manipulation, behavior in approach-avoidance conflicts was not affected as expected. Although yohimbine administration affected risky foraging latency under predation, we found no main effect of hydrocortisone or their interaction on behavior. In contrast, we found gender differences for almost all behavioral outcome measures, which might be explained by differences in endogenous testosterone levels. CONCLUSIONS The investigated major stress mediators were not sufficient to imitate previously shown stress effects on approach-avoidance conflict behavior. We discuss potential reasons for our findings and implications for future research.
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Affiliation(s)
- Kim Fricke
- Department of Psychology, Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany.
- ICAN Institute for Cognitive and Affective Neuroscience, Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany.
| | - Nina Alexander
- Department of Psychiatry and Psychotherapy, Philipps University Marburg, Rudolf-Bultmann-Str. 8, 35039, Marburg, Germany
| | - Thomas Jacobsen
- Experimental Psychology Unit, Helmut-Schmidt-University/University of the Federal Armed Forces Hamburg, Holstenhofweg 85, 22043, Hamburg, Germany
| | - Henriette Krug
- Faculty of Health Sciences, Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany
| | - Kai Wehkamp
- Faculty of Health Sciences, Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany
| | - Susanne Vogel
- Department of Psychology, Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany
- ICAN Institute for Cognitive and Affective Neuroscience, Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany
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Haass-Koffler CL, Magill M, Cannella N, Brown JC, Aoun EG, Cioe PA, Sinha R, Swift RM, Ciccocioppo R, Leggio L. Mifepristone as a pharmacological intervention for stress-induced alcohol craving: A human laboratory study. Addict Biol 2023; 28:e13288. [PMID: 37369125 PMCID: PMC10313137 DOI: 10.1111/adb.13288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 06/29/2023]
Abstract
Preclinical and clinical work suggests that mifepristone may be a viable treatment for alcohol use disorder (AUD). This was a Phase 1/2, outpatient, cross-over, randomized, double-blind, placebo-controlled trial with non-treatment-seeking individuals with AUD (N = 32). We assessed safety, alcohol craving and consumption, after 1-week mifepristone 600 mg/day administration, in a human laboratory study comprised of a single oral yohimbine administration (32.4 mg), a cue-reactivity procedure and alcohol self-administration. Safety was monitored by adverse events and hemodynamic parameters, alcohol craving by alcohol craving questionnaire and cue-induced saliva output. During the alcohol self-administration, we assessed alcohol pharmacokinetics, subjective effects and consumption. Outcomes were assessed using Generalized Estimating Equations and mediation analysis. Mild-moderate adverse events were reported in both conditions. There was no statistically significant difference between mifepristone and placebo in alcohol pharmacokinetics and subjective effects. Furthermore, blood pressure increased only in the placebo condition after the stress-induced laboratory procedures. Mifepristone, compared to placebo, significantly reduced alcohol craving and increased cortisol levels. Mifepristone-induced cortisol increase was not a mediator of alcohol craving. Mifepristone, compared to placebo, did not reduce alcohol consumption in the laboratory or in a naturalistic setting. This study successfully translated a developed preclinical procedure to a human laboratory study, confirming the safety of mifepristone in people with AUD and providing evidence to its role in reducing alcohol craving under stress procedures. The lack of effects on alcohol drinking may be related to the selection of non-treatment seekers and suggests future treatment-oriented trials should investigate mifepristone in people with AUD.
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Affiliation(s)
- Carolina L. Haass-Koffler
- Center for Alcohol and Addiction Studies, Brown University, Providence, RI, USA
- Department of Psychiatry and Human Behavior, Warren Alpert Medical School, Brown University, Providence, RI, USA
- Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, RI, USA
- Carney Institute for Brain Science, Providence RI, Brown University
| | - Molly Magill
- Center for Alcohol and Addiction Studies, Brown University, Providence, RI, USA
- Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, RI, USA
| | | | - Joshua C. Brown
- Department of Psychiatry, Harvard Medical School, McLean Hospital, Belmont, MA, USA
| | - Elie G. Aoun
- Division of Law, Ethics and Psychiatry, Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York City, NY, USA
| | - Patricia A. Cioe
- Center for Alcohol and Addiction Studies, Brown University, Providence, RI, USA
- Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, RI, USA
| | - Rajita Sinha
- Yale Stress Center, Department of Psychiatry, Department of Neuroscience, Yale School of Medicine, Yale University, New Haven, CT
| | - Robert M. Swift
- Center for Alcohol and Addiction Studies, Brown University, Providence, RI, USA
- Department of Psychiatry and Human Behavior, Warren Alpert Medical School, Brown University, Providence, RI, USA
- Providence Veterans Affairs Medical Center, Providence, RI, USA
| | | | - Lorenzo Leggio
- Center for Alcohol and Addiction Studies, Brown University, Providence, RI, USA
- Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, RI, USA
- Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section, Translational Addiction Medicine Branch, NIDA IRP and NIAAA DICBR, Baltimore and Bethesda, MD, USA
- Medication Development Program, National Institute on Drug Abuse Intramural Research Program, National Institutes of Health, Baltimore, MD, USA
- Division of Addiction Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC, USA
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Moses TE, Gray E, Mischel N, Greenwald MK. Effects of neuromodulation on cognitive and emotional responses to psychosocial stressors in healthy humans. Neurobiol Stress 2023; 22:100515. [PMID: 36691646 PMCID: PMC9860364 DOI: 10.1016/j.ynstr.2023.100515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 12/19/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023] Open
Abstract
Physiological and psychological stressors can exert wide-ranging effects on the human brain and behavior. Research has improved understanding of how the sympatho-adreno-medullary (SAM) and hypothalamic-pituitary-adrenocortical (HPA) axes respond to stressors and the differential responses that occur depending on stressor type. Although the physiological function of SAM and HPA responses is to promote survival and safety, exaggerated psychobiological reactivity can occur in psychiatric disorders. Exaggerated reactivity may occur more for certain types of stressors, specifically, psychosocial stressors. Understanding stressor effects and how the body regulates these responses can provide insight into ways that psychobiological reactivity can be modulated. Non-invasive neuromodulation is one way that responding to stressors may be altered; research into these interventions may provide further insights into the brain circuits that modulate stress reactivity. This review focuses on the effects of acute psychosocial stressors and how neuromodulation might be effective in altering stress reactivity. Although considerable research into stress interventions focuses on treating pathology, it is imperative to first understand these mechanisms in non-clinical populations; therefore, this review will emphasize populations with no known pathology and consider how these results may translate to those with psychiatric pathologies.
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Affiliation(s)
| | | | | | - Mark K. Greenwald
- Corresponding author. Department of Psychiatry and Behavioral Neurosciences, Tolan Park Medical Building, 3901 Chrysler Service Drive, Suite 2A, Detroit, MI, 48201, USA.
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Pasanta D, He JL, Ford T, Oeltzschner G, Lythgoe DJ, Puts NA. Functional MRS studies of GABA and glutamate/Glx - A systematic review and meta-analysis. Neurosci Biobehav Rev 2023; 144:104940. [PMID: 36332780 PMCID: PMC9846867 DOI: 10.1016/j.neubiorev.2022.104940] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/19/2022] [Accepted: 10/30/2022] [Indexed: 11/05/2022]
Abstract
Functional magnetic resonance spectroscopy (fMRS) can be used to investigate neurometabolic responses to external stimuli in-vivo, but findings are inconsistent. We performed a systematic review and meta-analysis on fMRS studies of the primary neurotransmitters Glutamate (Glu), Glx (Glutamate + Glutamine), and GABA. Data were extracted, grouped by metabolite, stimulus domain, and brain region, and analysed by determining standardized effect sizes. The quality of individual studies was rated. When results were analysed by metabolite type small to moderate effect sizes of 0.29-0.47 (p < 0.05) were observed for changes in Glu and Glx regardless of stimulus domain and brain region, but no significant effects were observed for GABA. Further analysis suggests that Glu, Glx and GABA responses differ by stimulus domain or task and vary depending on the time course of stimulation and data acquisition. Here, we establish effect sizes and directionality of GABA, Glu and Glx response in fMRS. This work highlights the importance of standardised reporting and minimal best practice for fMRS research.
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Affiliation(s)
- Duanghathai Pasanta
- Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, London, London SE5 8AB, United Kingdom,Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Jason L. He
- Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, London, London SE5 8AB, United Kingdom
| | - Talitha Ford
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Locked Bag 20000, Geelong, Victoria 3220, Australia,Centre for Human Psychopharmacology, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Georg Oeltzschner
- F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, 700. N. Broadway, 21207, Baltimore, United States,Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 601 N. Wolfe Street, 21205, Baltimore, United States
| | - David J. Lythgoe
- Department of Neuroimaging, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, London, London SE5 8AB, United Kingdom
| | - Nicolaas A. Puts
- Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, London, London SE5 8AB, United Kingdom,MRC Centre for Neurodevelopmental Disorders, New Hunt's House, Guy's Campus, King's College London, London SE1 1UL, London, United Kingdom
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10
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Dekkers AJ, Amaya JM, van der Meulen M, Biermasz NR, Meijer OC, Pereira AM. Long-term effects of glucocorticoid excess on the brain. J Neuroendocrinol 2022; 34:e13142. [PMID: 35980208 PMCID: PMC9541651 DOI: 10.1111/jne.13142] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/11/2022] [Accepted: 04/15/2022] [Indexed: 11/27/2022]
Abstract
The metabolic and cardiovascular clinical manifestations in patients with Cushing's syndrome (CS) are generally well known. However, recent studies have broadened the perspective of the effects of hypercortisolism, showing that both endogenous and exogenous glucocorticoid excess alter brain functioning on several time scales. Consequently, cognitive deficits and neuropsychological symptoms are highly prevalent during both active CS and CS in remission, as well as during glucocorticoid treatment. In this review, we discuss the effects of endogenous hypercortisolism and exogenously induced glucocorticoid excess on the brain, as well as the prevalence of cognitive and neuropsychological deficits and their course after biochemical remission. Furthermore, we propose possible mechanisms that may underly neuronal changes, based on experimental models and in vitro studies. Finally, we offer recommendations for future studies.
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Affiliation(s)
- Alies J. Dekkers
- Department of Medicine, Division of Endocrinology, Pituitary Center and Center for Endocrine TumorsLeiden University Medical CenterLeidenThe Netherlands
- Department of Medicine, Center for Endocrine Tumours LeidenLeiden University Medical CenterLeidenThe Netherlands
| | - Jorge Miguel Amaya
- Department of Medicine, Division of Endocrinology, Pituitary Center and Center for Endocrine TumorsLeiden University Medical CenterLeidenThe Netherlands
| | - Merel van der Meulen
- Department of Medicine, Division of Endocrinology, Pituitary Center and Center for Endocrine TumorsLeiden University Medical CenterLeidenThe Netherlands
- Department of Medicine, Center for Endocrine Tumours LeidenLeiden University Medical CenterLeidenThe Netherlands
| | - Nienke R. Biermasz
- Department of Medicine, Division of Endocrinology, Pituitary Center and Center for Endocrine TumorsLeiden University Medical CenterLeidenThe Netherlands
- Department of Medicine, Center for Endocrine Tumours LeidenLeiden University Medical CenterLeidenThe Netherlands
| | - Onno C. Meijer
- Department of Medicine, Division of Endocrinology, Pituitary Center and Center for Endocrine TumorsLeiden University Medical CenterLeidenThe Netherlands
| | - Alberto M. Pereira
- Department of Endocrinology & MetabolismAmsterdam UMC (AMC)AmsterdamThe Netherlands
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11
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Cho SY, Kwon S, Shin HY, Kim HR, Kim JH, Park S, Ryu CW, Park JM, Edden RAE, Jahng GH. Treatment evaluation of Kami Guibi-tang on participants with amnestic mild cognitive impairment using magnetic resonance imaging on brain metabolites, gamma-aminobutyric acid, and cerebral blood flow. J Appl Clin Med Phys 2021; 22:151-164. [PMID: 34633758 PMCID: PMC8598148 DOI: 10.1002/acm2.13443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 09/09/2021] [Accepted: 09/22/2021] [Indexed: 11/11/2022] Open
Abstract
Purpose To evaluate the effectiveness of Kami Guibi‐tang (KGT) in the treatment of mild cognitive impairment (MCI) using magnetic resonance imaging (MRI) on brain metabolites, neurotransmitter, and cerebral blood flow (CBF). Methods We randomly allocated a total of 30 MCI patients to a KGT (N = 16) or a placebo (N = 14) group and performed MRI scans before and after 24 weeks of treatment. The participants underwent brain magnetic resonance spectroscopy and MRI scans to obtain brain metabolites using Point‐RESolved Spectroscopy (PRESS) single‐voxel spectroscopy, gamma‐aminobutyric acid (GABA) neurotransmitter using Mescher–Garwood PRESS, and CBF using pseudocontinuous arterial spin labeling sequences using a 3.0 Tesla MRI system. We analyzed metabolite and neurotransmitter levels and CBF using repeated‐measure analysis of variance to evaluate between‐subject group effect, within‐subject treatment condition effect, and interaction of group by condition (group x condition). Results The GABA+/creatine (Cr) ratio values were not significantly different between the before and after treatment conditions. The glutamate complex/Cr ratio difference before and after treatment was lower in the KGT group than in the placebo group, but was not statistically significant (p = 0.077). The result of region of interest–based CBF measurement showed that CBF values were significantly lower after treatment at Cluster 2 for the KGT group (p = 0.003) and the placebo group (p = 0.011), at hippocampus for the KGT group (p = 0.004) and the placebo group (p = 0.008), and at the fusiform gyrus for the KGT group (p = 0.002). Furthermore, the absolute CBF difference before and after treatment in the fusiform gyrus was significantly lower in the KGT group than in the placebo group (p = 0.024). Conclusions Although a KGT treatment of 24 weeks showed some significant impact on the level of CBF, the Korean version of the mini‐mental state examination score was not significantly different between before and after treatment conditions, indicating that there was no memory function improvement after treatment in amnestic MCI patients. Therefore, further studies should be performed with a relatively larger population and extending the duration of the KGT treatment.
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Affiliation(s)
- Seung-Yeon Cho
- Stroke and Neurological Disorders Center, Kyung Hee University Hospital at Gangdong, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Sharonkyuhee Kwon
- Department of Biomedical Engineering, Undergraduate School, College of Electronics and Information, Kyung Hee University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Hee-Yeon Shin
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Ha-Ri Kim
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Jeong-Hwa Kim
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Soonchan Park
- Department of Radiology, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Chang-Woo Ryu
- Department of Radiology, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Jung-Mi Park
- Stroke and Neurological Disorders Center, Kyung Hee University Hospital at Gangdong, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Richard A E Edden
- Division of Neuroradiology, Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Geon-Ho Jahng
- Department of Radiology, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
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12
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Schlatter S, Guillot A, Schmidt L, Mura M, Trama R, Di Rienzo F, Lilot M, Debarnot U. Combining proactive transcranial stimulation and cardiac biofeedback to substantially manage harmful stress effects. Brain Stimul 2021; 14:1384-1392. [PMID: 34438047 DOI: 10.1016/j.brs.2021.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/18/2021] [Accepted: 08/21/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Previous studies have identified the dorsolateral prefrontal cortex (dlPFC) as a core region in cognitive emotional regulation. Transcranial direct current stimulations of the dlPFC (tDCS) and heart-rate variability biofeedback (BFB) are known to regulate emotional processes. However, the effect of these interventions applied either alone or concomitantly during an anticipatory stress remains unexplored. OBJECTIVE The study investigated the effect of anodal tDCS and BFB, alone or combined, on psychophysiological stress responses and cognitive functioning. METHODS Following a stress anticipation induction, 80 participants were randomized into four groups and subjected to a 15-min intervention: neutral video viewing (ctrl), left dlPFC anodal tDCS (tdcs), heart-rate variability biofeedback (bfb), or a combined treatment (bfb + tdcs). Participants were then immediately confronted with the stressor, which was followed by an assessment of executive functions. Psychophysiological stress responses were assessed throughout the experiment (heart rate, heart-rate variability, salivary cortisol). RESULTS The tdcs did not modulate stress responses. Compared with both ctrl and tdcs interventions, bfb reduced physiological stress and improved executive functions after the stressor. The main finding revealed that bfb + tdcs was the most effective intervention, yielding greater reduction in psychological and physiological stress responses than bfb. CONCLUSIONS Combining preventive tDCS with BFB is a relevant interventional approach to reduce psychophysiological stress responses, hence offering a new and non-invasive treatment of stress-related disorders. Biofeedback may be particularly useful for preparing for an important stressful event when performance is decisive.
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Affiliation(s)
- Sophie Schlatter
- Inter-University Laboratory of Human Movement Biology-EA 7424, University of Lyon, University Claude Bernard Lyon 1, 69 622, Villeurbanne, France; Centre Lyonnais d'Enseignement par Simulation en Santé (CLESS, high fidelity medical simulation centre), SAMSEI, Lyon, France.
| | - Aymeric Guillot
- Inter-University Laboratory of Human Movement Biology-EA 7424, University of Lyon, University Claude Bernard Lyon 1, 69 622, Villeurbanne, France.
| | - Laura Schmidt
- Université Claude Bernard Lyon 1, Research on Healthcare Performance (RESHAPE), INSERM U1290, Lyon, France; Centre Lyonnais d'Enseignement par Simulation en Santé (CLESS, high fidelity medical simulation centre), SAMSEI, Lyon, France.
| | - Mathilde Mura
- Inter-University Laboratory of Human Movement Biology-EA 7424, University of Lyon, University Claude Bernard Lyon 1, 69 622, Villeurbanne, France.
| | - Robin Trama
- Inter-University Laboratory of Human Movement Biology-EA 7424, University of Lyon, University Claude Bernard Lyon 1, 69 622, Villeurbanne, France.
| | - Franck Di Rienzo
- Inter-University Laboratory of Human Movement Biology-EA 7424, University of Lyon, University Claude Bernard Lyon 1, 69 622, Villeurbanne, France.
| | - Marc Lilot
- Université Claude Bernard Lyon 1, Research on Healthcare Performance (RESHAPE), INSERM U1290, Lyon, France; Hospices Civils de Lyon, Departments of Anaesthesia and Intensive Care, University Claude Bernard Lyon 1, Lyon, France; Centre Lyonnais d'Enseignement par Simulation en Santé (CLESS, high fidelity medical simulation centre), SAMSEI, Lyon, France.
| | - Ursula Debarnot
- Inter-University Laboratory of Human Movement Biology-EA 7424, University of Lyon, University Claude Bernard Lyon 1, 69 622, Villeurbanne, France; Institut Universitaire de France, France.
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13
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Ge Q, Hu X, Ma N, Sun M, Zhang L, Cai Z, Tan R, Lu H. Maternal high-salt diet during pregnancy impairs synaptic plasticity and memory in offspring. FASEB J 2021; 35:e21244. [PMID: 33715195 DOI: 10.1096/fj.202001890r] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 11/11/2022]
Abstract
Excess salt intake harms the brain health and cognitive functions, but whether a maternal high-salt diet (HSD) affects the brain development and neural plasticity of offspring remains unclear. Here, using a range of behavioral tests, we reported that the offspring of maternal HSD subjects exhibited short- and long-term memory deficits, especially in spatial memory in adulthood. Moreover, impairments in synaptic transmission and plasticity in the hippocampus were observed in adult offspring by using in vivo electrophysiology. Consistently, the number of astrocytes but not neurons in the hippocampus of the offspring from the HSD group were significantly decreased, and ERK and AKT signaling pathways involved in neurodevelopment were highly activated only during juvenile. In addition, the expression of synaptic proteins decreased both in juvenile and adulthood, and this effect might be involved in synaptic dysfunction. Collectively, these data demonstrated that the maternal HSD might cause adult offspring synaptic dysfunction and memory loss. It is possibly due to the reduction of astrocytes in juvenile.
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Affiliation(s)
- Qian Ge
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Xiaoxuan Hu
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China.,Department of Human Anatomy and Histo-embryology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Ning Ma
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China.,Department of Human Anatomy and Histo-embryology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Meiqi Sun
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Liyun Zhang
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China.,Department of Human Anatomy and Histo-embryology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Zhenlu Cai
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Ruolan Tan
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China.,Department of Human Anatomy and Histo-embryology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
| | - Haixia Lu
- Department of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, P.R. China
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14
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Schlatter S, Schmidt L, Lilot M, Guillot A, Debarnot U. Implementing biofeedback as a proactive coping strategy: Psychological and physiological effects on anticipatory stress. Behav Res Ther 2021; 140:103834. [PMID: 33743384 DOI: 10.1016/j.brat.2021.103834] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 01/10/2023]
Abstract
Anticipating a stressful situation involves psychophysiological reactions before the occurrence of the overt stress event. The current challenge in the stress domain is to characterize anticipatory stress reactions and how to effectively modulate them. The present study aimed to characterize the anticipation period and evaluate the benefits of a heart-rate variability biofeedback (BFB) intervention designed to manage anticipatory stress. Healthy participants were exposed to an anticipation stress period (15 min) during which they either practised BFB (stress + bfb, n = 15) or watched a neutral video (stress + video, n = 14). Anticipatory stress was effectively induced by the Trier Social Anticipatory Stress (TSAS) protocol, specifically designed for this study. Control participants, without anticipation stress, practised BFB for an equivalent time (ctrl + bfb, n = 15). Subsequently, all participants performed a set of cognitive tasks assessing executive functions. Heart-rate variability (cardiac coherence, standard deviation of the R-R intervals, root mean square of successive difference measure) and the evolution of the perceived psychological state were measured during the anticipation period. Self-reported judgements of how the intervention influenced stress and performance were further assessed. The main result showed that BFB is a relevant proactive stress-coping method. Compared with the stress + video group, participants who practised BFB attained higher cardiac coherence scores. Post-intervention self-reported measures revealed that BFB contributed to reduce psychological stress and increase perceived levels of performance. Together, these findings provide practical guidelines for examining the stress anticipation period by means of the TSAS protocol.
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Affiliation(s)
- Sophie Schlatter
- Univ. Lyon, UCBL-Lyon 1, Laboratoire Interuniversitaire de Biologie de La Motricité, EA 7424, F-69622, Villeurbanne, France.
| | - Laura Schmidt
- Research on Healthcare Performance (RESHAPE), INSERM U1290, Lyon, France
| | - Marc Lilot
- Research on Healthcare Performance (RESHAPE), INSERM U1290, Lyon, France; Hôpital Louis Pradel, Hospices Civils de Lyon, Departments of Anaesthesia and Intensive Care, Lyon, France; Centre Lyonnais d'Enseignement par Simulation en Santé (CLESS, medical simulation centre), University Claude Bernard Lyon 1, 69003, Lyon, France
| | - Aymeric Guillot
- Univ. Lyon, UCBL-Lyon 1, Laboratoire Interuniversitaire de Biologie de La Motricité, EA 7424, F-69622, Villeurbanne, France
| | - Ursula Debarnot
- Univ. Lyon, UCBL-Lyon 1, Laboratoire Interuniversitaire de Biologie de La Motricité, EA 7424, F-69622, Villeurbanne, France; Institut Universitaire de France, France.
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15
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Ano Y, Kita M, Kobayashi K, Koikeda T, Kawashima R. Effects of β-Lactolin on Regional Cerebral Blood Flow within the Dorsolateral Prefrontal Cortex during Working Memory Task in Healthy Adults: A Randomized Controlled Trial. J Clin Med 2021; 10:jcm10030480. [PMID: 33525551 PMCID: PMC7865841 DOI: 10.3390/jcm10030480] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 12/19/2022] Open
Abstract
Epidemiological studies have reported that consumption of dairy products rich in β-lactolin is beneficial for cognitive decline among elderly individuals. Although previous studies have shown that β-lactolin supplementation improves memory function and attention in healthy adults, the mechanism through which β-lactolin affects human brain function has yet to be elucidated. This placebo-controlled randomized double-blind study therefore examined the effects of β-lactolin on human regional cerebral blood flow (rCBF) using near-infrared spectroscopy (NIRS) according to the Consolidated Standards of Reporting Trials guidelines. A total of 114 healthy participants aged between 50 and 75 years with relatively low cognition were randomly allocated into the β-lactolin or placebo groups (n = 57 for both groups) and received supplementation for 6 weeks. After the 6 weeks of supplementation, total hemoglobin during cognitive tasks (Kraepelin and 2-back tasks) was measured using two-channel NIRS to determine rCBF. Accordingly, the β-lactolin group had significantly higher changes in total hemoglobin at the left dorsolateral prefrontal cortex (DLPFC) area measured using the left-side channel during the 2-back tasks (p = 0.027) compared to the placebo group. The present study suggests that β-lactolin supplementation increases rCBF and DLPFC activity during working memory tasks.
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Affiliation(s)
- Yasuhisa Ano
- Kirin Central Research Institute, Kirin Holdings Company, Ltd., 26-1, Muraoka-Higashi 2, Fujisawa Kanagawa 251-8555, Japan; (M.K.); (K.K.)
- Correspondence:
| | - Masahiro Kita
- Kirin Central Research Institute, Kirin Holdings Company, Ltd., 26-1, Muraoka-Higashi 2, Fujisawa Kanagawa 251-8555, Japan; (M.K.); (K.K.)
| | - Keiko Kobayashi
- Kirin Central Research Institute, Kirin Holdings Company, Ltd., 26-1, Muraoka-Higashi 2, Fujisawa Kanagawa 251-8555, Japan; (M.K.); (K.K.)
| | - Takashi Koikeda
- Shiba Palace Clinic, Daiwa A Hamamatsucho 6F, 1-9-10, Hamamatsucho, Minato-ku, Tokyo 105-0013, Japan;
| | - Ryuta Kawashima
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, 4-1 Seiryo, Aoba-ku, Sendai 980-8575, Japan;
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16
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Kim HJ, Bae S, Huh JH, Lee JW, Han DH. Hemodynamic Changes in Response to Aerobic Exercise: Near-infrared Spectroscopy Study. Int J Sports Med 2020; 42:377-385. [PMID: 33075828 DOI: 10.1055/a-1198-8465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study aimed to determine the neurophysiological mechanisms underlying the effects of aerobic exercise, which influence brain O2 consumption, on cognitive enhancement. Sixteen healthy men were asked to complete a 2-back test at rest and after moderate and high-intensity aerobic exercise. During the 2-back test, hemodynamic changes within the prefrontal cortex were assessed using high-density functional near-infrared spectroscopy. Scores of the 2-back test, regardless of the exercise intensity, were positively correlated with the hemodynamic changes within the right and left dorsolateral prefrontal cortex (DLPFC). During an 2-back test, there were differences in the hemodynamic changes within the DLPFC with moderate and high-intensity exercise conditions. In the 2-back condition, the accumulated oxyhemoglobin within the right DLPFC after moderate intensity exercise was 7.9% lower than that at baseline, while the accumulated oxyhemoglobin within the left DLPFC was 14.6% higher than that at baseline after high-intensity exercise. In response to the 2-back test, the accumulated oxygenated hemoglobin within the left DLPFC after high-intensity exercise increased more significantly than that observed after moderate intensity exercise. These results show that the right DLPFC consumes O2 more efficiently in response to moderate intensity aerobic exercise than in response to high-intensity aerobic exercise.
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Affiliation(s)
- Hee Jin Kim
- Department of Psychiatry, College of Medicine, Chung-Ang University, Seoul, Korea (the Republic of)
| | - Sujin Bae
- Department of Psychiatry, College of Medicine, Chung-Ang University, Seoul, Korea (the Republic of)
| | - Jung Hun Huh
- Department of Human Motor Behavior, Chung-Ang University, An-seong, Korea (the Republic of)
| | - Jea Woog Lee
- Department of Information & Technology in Sport, Chung-Ang University, An-seong, Korea (the Republic of)
| | - Doug Hyun Han
- Department of Psychiatry, College of Medicine, Chung-Ang University, Seoul, Korea (the Republic of)
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17
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Abbasi-Habashi S, Ghasemzadeh Z, Rezayof A. Morphine improved stress-induced amnesia and anxiety through interacting with the ventral hippocampal endocannabinoid system in rats. Brain Res Bull 2020; 164:407-414. [PMID: 32937186 DOI: 10.1016/j.brainresbull.2020.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/28/2020] [Accepted: 09/06/2020] [Indexed: 12/15/2022]
Abstract
The present study aimed to investigate the possible role of the ventral hippocampal (VH) cannabinoid CB1 receptors in the improving effect of morphine on stress-induced memory formation impairment and anxiety. A step-through type passive avoidance task and a hole-board test were used to measure memory formation and anxiety-like exploratory behavior, respectively. The results showed that the exposure to 10-min stress immediately after the successful training phase impaired memory formation and also produced anxiogenic-like exploratory behaviour in adult male Wistar rats. Moreover, morphine administration before stress exposure improved the adverse effects of stress on memory formation and exploratory behaviour. After training, intra-VH microinjection of cannabinoid CB1/CB2 receptor agonist, WIN 55,212-2 (0.01-0.05 μg/rat) enhanced the response of an ineffective dose of morphine (0.5 mg/kg for memory; 5 mg/kg for anxiety, i.p.) on memory impairment and anxiogenic-like exploratory behaviour induced by acute stress. Intra-VH microinjection of the higher dose of WIN 55,212-2 alone impaired memory formation. Post-training microinjection of a cannabinoid CB1 receptor antagonist/inverse agonist, AM-251 (100-150 ng/rat) into the VH attenuated the response of an effective dose of morphine (5 mg/kg for memory; 6 mg/kg for anxiety, i.p.) in stress-exposed rats. Taken together, the present results showed that morphine administration could improve stress-induced memory impairment and anxiety in the rats exposed to the inescapable acute stress. Interestingly, the improving effect of morphine on the adverse effect of stress on memory formation and anxiety-like exploratory behaviour may be mediated through the VH endocannabinoid CB1/CB2 receptors mechanism.
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Affiliation(s)
- Sima Abbasi-Habashi
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Zahra Ghasemzadeh
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Ameneh Rezayof
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
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18
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Woodcock EA, Stanley JA, Diwadkar VA, Khatib D, Greenwald MK. A neurobiological correlate of stress-induced nicotine-seeking behavior among cigarette smokers. Addict Biol 2020; 25:e12819. [PMID: 31418989 DOI: 10.1111/adb.12819] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 07/11/2019] [Accepted: 07/14/2019] [Indexed: 02/06/2023]
Abstract
Stress is known to influence smoking relapse. Experimental studies indicate that acute stress increases nicotine-seeking behavior, yet neurobiological mechanisms remain poorly understood. Herein, we investigated disrupted excitatory neural activity in the dorsolateral prefrontal cortex (dlPFC) as a mechanism of stress-induced nicotine-seeking behavior. Non-treatment-seeking cigarette smokers were screened for psychiatric, medical, and neuroimaging contraindications. Using a double-blind, placebo-controlled, randomized crossover design, participants (N = 21) completed two oral-dosing sessions: stress (yohimbine 54 mg + hydrocortisone 10 mg) vs placebo (lactose 54 mg + lactose 10 mg). During each experimental session, working memory proficiency, dlPFC excitatory neural activity, nicotine-seeking behavior, and subjective effects were measured. dlPFC excitatory neural activity was quantified via glutamate modulation during working memory performance using functional proton magnetic resonance spectroscopy. Nicotine-seeking behavior was assayed using a cigarette puffs vs money choice progressive ratio task. Results indicated that yohimbine + hydrocortisone evoked a sustained physiological stress response (elevated heart rate, blood pressure, saliva cortisol, and saliva α-amylase levels; ps < .05). Relative to placebo levels, acute stress increased nicotine-seeking behavior (ps < .05), disrupted dlPFC glutamate modulation (p = .025), and impaired dlPFC function (working memory proficiency; ps < .05). The stress-induced increase in nicotine-seeking behavior was linearly related to the stress-induced disruption of dlPFC glutamate modulation (R2 = 0.24-0.37; ps < .05). These findings suggest that disrupted dlPFC excitatory neural activity is a neurobiological correlate of acute stress-induced nicotine-seeking behavior. These findings further emphasize the central role of the dlPFC in regulating drug-seeking behavior. Future studies are needed to evaluate interventions to improve dlPFC resilience to acute stress effects, including neurostimulation, working memory training, and "anti-stress" medications.
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Affiliation(s)
- Eric A. Woodcock
- Department of Psychiatry Yale University School of Medicine New Haven Connecticut USA
- Department of Psychiatry and Behavioral Neurosciences Wayne State University School of Medicine Detroit Michigan USA
| | - Jeffrey A. Stanley
- Department of Psychiatry and Behavioral Neurosciences Wayne State University School of Medicine Detroit Michigan USA
| | - Vaibhav A. Diwadkar
- Department of Psychiatry and Behavioral Neurosciences Wayne State University School of Medicine Detroit Michigan USA
| | - Dalal Khatib
- Department of Psychiatry and Behavioral Neurosciences Wayne State University School of Medicine Detroit Michigan USA
| | - Mark K. Greenwald
- Department of Psychiatry and Behavioral Neurosciences Wayne State University School of Medicine Detroit Michigan USA
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Gusso D, Reolon GK, Gonzalez JB, Altenhofen S, Kist LW, Bogo MR, Bonan CD. Pyriproxyfen Exposure Impairs Cognitive Parameters and Alters Cortisol Levels in Zebrafish. Front Behav Neurosci 2020; 14:103. [PMID: 32625070 PMCID: PMC7313640 DOI: 10.3389/fnbeh.2020.00103] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 05/25/2020] [Indexed: 12/27/2022] Open
Abstract
Pyriproxyfen is one of the most used larvicides and insecticides; it acts as an analog of juvenile insect hormone (a growth regulator). It is highly toxic during all stages of mosquito development, suppresses metamorphosis, and interferes in insect reproduction and proliferation. Pyriproxyfen and its main metabolite have been shown to affect brain development in rodents. This compound is employed mainly to eliminate outbreaks of the genus Aedes, even in potable water. Despite the increasing number of toxicological studies about larvicides and insecticides-with an indication of continuous use-there have been few studies about the effects of pyriproxyfen in non-target species such as fish. This study evaluated the effects of pyriproxyfen on behavioral, cognitive, and endocrine parameters in zebrafish. We exposed adult zebrafish to different pyriproxyfen (Pestanal®) concentrations (0.125, 0.675, and 1.75 mg/l) for 96 h. We analyzed behavioral parameters, memory, cortisol levels, and gene expression of glucocorticoid receptor (gr) and corticotrophin-releasing factor (crf) after pyriproxyfen exposure. This exposure did not alter locomotion (distance or mean speed), anxiety-like behavior (latency to enter to the top zone of the tank or time in the top zone of the tank), and social or aggressive behavior. However, there was impaired inhibitory avoidance memory at all tested pyriproxyfen concentrations. Cortisol levels were reduced in exposed groups when compared to control or vehicle. However, gr and crf gene expression in pyriproxyfen-treated animals were unaltered when compared to control or vehicle groups. Taken together, these findings indicate that pyriproxyfen may induce cognitive impairment and altered cortisol levels in zebrafish, a non-target species.
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Affiliation(s)
- Darlan Gusso
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Gustavo Kellermann Reolon
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jonas Brum Gonzalez
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Stefani Altenhofen
- Programa de Pos-Graduacao em Medicina e Ciencias da Saude, Escola de Medicina, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Luiza Wilges Kist
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Mauricio Reis Bogo
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
- Programa de Pos-Graduacao em Medicina e Ciencias da Saude, Escola de Medicina, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carla Denise Bonan
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
- Programa de Pos-Graduacao em Medicina e Ciencias da Saude, Escola de Medicina, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
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Schlatter S, Guillot A, Faes C, Saruco E, Collet C, Di Rienzo F, Debarnot U. Acute stress affects implicit but not explicit motor imagery: A pilot study. Int J Psychophysiol 2020; 152:62-71. [DOI: 10.1016/j.ijpsycho.2020.04.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/30/2022]
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Wanke N, Müller JC, Wiedemann K, Schwabe L. (Lack of) Effects of noradrenergic stimulation on human working memory performance. Psychopharmacology (Berl) 2020; 237:3033-3046. [PMID: 32583013 PMCID: PMC7524848 DOI: 10.1007/s00213-020-05590-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 06/11/2020] [Indexed: 11/29/2022]
Abstract
RATIONALE Working memory depends on prefrontal cortex functioning, which is particularly sensitive to levels of noradrenaline. Studies in non-human primates have shown that modest levels of noradrenaline improve working memory, and that higher levels of noradrenaline impair working memory performance. However, research in humans provided inconsistent findings concerning noradrenergic effects on working memory. OBJECTIVE The present study aimed at assessing dose-dependent effects of yohimbine, an alpha-2 adrenoceptor antagonist, on working memory performance in healthy humans. We further aimed to explore a potential interactive effect between noradrenergic arousal and lack of control over aversive events on working memory performance. METHODS We used a double-blind, fully crossed, placebo-controlled, between-subject design. Participants (N = 121) performed an adaptive n-back task before and after oral administration of either a placebo, 20 mg, or 40 mg yohimbine and a manipulation of controllability, during which participants could either learn to avoid electric shocks (controllability groups), had no instrumental control over shock administration (uncontrollability groups), or did not receive any shocks (no-shock control group). RESULTS While no significant results of noradrenergic stimulation through yohimbine were obtained using conventional frequentist analyses, additional Bayesian analyses provided strong evidence for the absence of an association between pharmacological treatment and working memory performance. We further observed no effect of controllability and no interaction between noradrenergic stimulation and the manipulation of controllability. CONCLUSIONS Our results suggest that noradrenergic stimulation through yohimbine does not affect (non-spatial) working memory in healthy human participants.
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Affiliation(s)
- Nadine Wanke
- Department of Cognitive Psychology, University of Hamburg, 20146 Hamburg, Germany
| | | | - Klaus Wiedemann
- Department of Psychiatry, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Lars Schwabe
- Department of Cognitive Psychology, University of Hamburg, 20146, Hamburg, Germany.
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