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Jukema B, Pelgrim T, Spoelder M, Bongers C, Hopman M, Smit K, Rijk M, Venekamp R, Vrisekoop N, Koenderman L. Automated, Point-of-Care mobile flow cytometry: Bringing the laboratory to the sample. Heliyon 2024; 10:e28883. [PMID: 38628748 PMCID: PMC11019183 DOI: 10.1016/j.heliyon.2024.e28883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/25/2024] [Accepted: 03/26/2024] [Indexed: 04/19/2024] Open
Abstract
Background Innate effector cells are very responsive to infectious and inflammatory cues found in damaged and inflamed tissues. Their activation is a potential target to assess the state of the immune system. Unfortunately, these cells are very susceptible for ex-vivo activation, hampering accurate interpretation of flow cytometry data. Whether a brief window exists before ex-vivo activation starts to occur is currently unknown. Aims 1) This study extensively investigated ex-vivo activation of innate effector cells over time. 2) We tested the feasibility of applying a mobile, automated, flow cytometry laboratory for out-of-hospital Point-of-Care analyses to minimize ex-vivo activation bias. Methods 1) Ex-vivo neutrophil, eosinophil and monocyte activation in a blood collection tube over time and the reactivity to a formyl-peptide was investigated in a healthy cohort. 2) To facilitate fast, out-of-hospital analysis, application of the mobile flow cytometry was tested by placing an automated flow cytometer into a van. The stability of the setup was assessed by repetitively measuring laser alignment and fluorescence verification beads. Findings 1) Immediately after venipuncture activation marker expression on neutrophils, eosinophils and monocyte subsets started to change in a time-dependent manner. 2) The mobile flow cytometry laboratory travelled over 3000 km, performing measurements at 19 locations with a median single-person-set-up time of 14 min. The laser alignment and fluorescence were stable during all experiments. Conclusions Accurate flow data of innate immune cells are only obtained when ex-vivo activation is kept to minimum. The use of a mobile, fast, automated, flow cytometry laboratory for out-of-hospital Point-of-Care analyses provides new investigational and diagnostic possibilities outside major hospital flow cytometry laboratories.
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Affiliation(s)
- B.N. Jukema
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - T.C. Pelgrim
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - M. Spoelder
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - C.C.W.G. Bongers
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - M.T.E. Hopman
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - K. Smit
- Department of General Practice and Nursing Science, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - M.H. Rijk
- Department of General Practice and Nursing Science, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - R.P. Venekamp
- Department of General Practice and Nursing Science, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - N. Vrisekoop
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - L. Koenderman
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
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Sun M, Brivio P, Shan L, Docq S, Heltzel LCMW, Smits CAJ, Middelman A, Vrooman R, Spoelder M, Verheij MMM, Buitelaar JK, Boillot M, Calabrese F, Homberg JR, Hanswijk SI. Offspring's own serotonin transporter genotype, independently from the maternal one, increases anxiety- and depression-like behavior and alters neuroplasticity markers in rats. J Affect Disord 2024; 350:89-101. [PMID: 38220097 DOI: 10.1016/j.jad.2024.01.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 01/06/2024] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Abstract
INTRODUCTION Developmental changes due to early life variations in the serotonin system affect stress-related behavior and neuroplasticity in adulthood. These outcomes can be caused both by offspring's own and maternal serotonergic genotype. We aimed to dissociate the contribution of the own genotype from the influences of mother genotype. METHODS Sixty-six male homozygous (5-HTT-/-) and heterozygous (5-HTT+/-) serotonin transporter knockout and wild-type rats from constant 5-HTT genotype mothers crossed with varying 5-HTT genotype fathers were subjected to tests assessing anxiety- and depression-like behaviors. Additionally, we measured plasma corticosterone levels and mRNA levels of BDNF, GABA system and HPA-axis components in the prelimbic and infralimbic cortex. Finally, we assessed the effect of paternal 5-HTT genotype on these measurements in 5-HTT+/- offspring receiving their knockout allele from their mother or father. RESULTS 5-HTT-/- offspring exhibited increased anxiety- and depression-like behavior in the elevated plus maze and sucrose preference test. Furthermore, Bdnf isoform VI expression was reduced in the prelimbic cortex. Bdnf isoform IV and GABA related gene expression was also altered but did not survive false discovery rate (FDR) correction. Finally, 5-HTT+/- offspring from 5-HTT-/- fathers displayed higher levels of anxiety- and depression-like behavior and changes in GABA, BDNF and HPA-axis related gene expression not surviving FDR correction. LIMITATIONS Only male offspring was tested. CONCLUSIONS Offspring's own 5-HTT genotype influences stress-related behaviors and Bdnf isoform VI expression, independently of maternal 5-HTT genotype. Paternal 5-HTT genotype separately influenced these outcomes. These findings advance our understanding of the 5-HTT genotype dependent susceptibility to stress-related disorders.
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Affiliation(s)
- Menghan Sun
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Paola Brivio
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Ling Shan
- Department Neuropsychiatric Disorders, Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands
| | - Sylvia Docq
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Lisa C M W Heltzel
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Celine A J Smits
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Anthonieke Middelman
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Roel Vrooman
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Marcia Spoelder
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands; Department of Molecular Neurobiology, Radboud University Nijmegen, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Michel M M Verheij
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Jan K Buitelaar
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands; Karakter Child and Adolescent Psychiatry University Center, Nijmegen, the Netherlands
| | - Morgane Boillot
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
| | - Francesca Calabrese
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Judith R Homberg
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands.
| | - Sabrina I Hanswijk
- Department of Cognitive Neuroscience, Radboud University Medical Center, Donders Institute for Brain, Cognition, and Behaviour, the Netherlands
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Koopmans L, Spoelder M, Bongers CCWG, Eijsvogels TMH, Hopman MTE. The effect of lesser mealworm protein on exercise-induced muscle damage in active older adults: a randomized controlled trial. J Nutr Health Aging 2024; 28:100204. [PMID: 38460318 DOI: 10.1016/j.jnha.2024.100204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/11/2024]
Abstract
OBJECTIVES We compared the effect of 12 weeks lesser mealworm-based (Alphitobius diaperinus) protein supplementation to whey protein and placebo supplementation on Exercise-Induced Muscle Damage (EIMD) after long-distance walking in older adults. METHODS in this randomized controlled trial, 70 physically active older adults (>60 years) were randomly allocated to the following groups: I) lesser mealworm protein, II) whey protein or III) iso-caloric placebo. Participants received supplements 11 weeks before and 1 week during a 3-day long-distance walking challenge (30-50 km per day). Blood concentrations of creatinine kinase (CK) and lactate dehydrogenase (LDH), handgrip strength and muscle soreness were measured pre-exercise and directly after each walking bout. RESULTS Significant elevations of CK concentrations (103 [76-161] U/l to 758 [342-1104] U/l, p < 0.001) and LDH concentrations (202 [175-220] to 283 [252-339] U/l, p < 0.001) were observed following 7h45 min ± 11 min of walking exercise per day, but the magnitude of this effect did not differ among suppletion groups. Hand grip strength decreased significantly (p < 0.001) while muscle soreness increased (p = 0.002) after the first walking day compared to pre-exercise, with no group differences. CONCLUSION 12-weeks of lesser mealworm-based protein supplementation (30 g/day) does not attenuate exercise induced muscle damage in older adults following three days of prolonged walking exercise in comparison to placebo or whey protein.
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Affiliation(s)
- Lotte Koopmans
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marcia Spoelder
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Primary and Community Care, Radboud University Medical Center, Radboud, The Netherlands
| | - Coen C W G Bongers
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands; School of Sport and Exercise, HAN University of Applied Sciences, Nijmegen, The Netherlands
| | - Thijs M H Eijsvogels
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maria T E Hopman
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands.
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Wolf CJH, Spoelder M, Beurmanjer H, Bulthuis R, Schellekens AFA, Homberg JR. Individual differences in GHB consumption in a new voluntary GHB self-administration model in outbred rats. Psychopharmacology (Berl) 2024; 241:613-625. [PMID: 38334790 PMCID: PMC10884067 DOI: 10.1007/s00213-024-06537-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 01/17/2024] [Indexed: 02/10/2024]
Abstract
BACKGROUND AND PURPOSE The use of the recreational drug gamma-hydroxybutyric acid (GHB) has increased over the past decade, concomitantly leading to a higher incidence of GHB use disorder. Evidence-based treatment interventions are hardly available and cognitive effects of long-term GHB use remain elusive. In order to study the development of GUD and the causal effects of chronic GHB consumption, a GHB self-administration model is required. EXPERIMENTAL APPROACH Long Evans rats had access to GHB in their home cage according to a two-bottle choice procedure for 3 months. Intoxication and withdrawal symptoms were assessed using an automated sensor-based setup for longitudinal behavioral monitoring. Rats were trained in an operant environment according to a fixed ratio (FR) 1, 2, and 4 schedule of reinforcement. Addiction-like behaviors were assessed through progressive ratio-, non-reinforced-, and quinine-adulterated operant tests. In addition, the novel object recognition test and elevated plus maze test were performed before and after GHB self-administration to assess memory performance and anxiety-like behavior, respectively. KEY RESULTS All rats consumed pharmacologically relevant levels of GHB in their home cage, and their intake remained stable over a period of 3 months. No clear withdrawal symptoms were observed following abstinence. Responding under operant conditions was characterized by strong inter-individual differences, where only a subset of rats showed high motivation for GHB, habitual GHB-seeking, and/or continued responding for GHB despite an aversive taste. Male rats showed a reduction in long-term memory performance 3 months after home-cage GHB self-administration. Anxiety-like behavior was not affected by GHB self-administration. CONCLUSION AND IMPLICATIONS The GHB self-administration model was able to reflect individual susceptibility for addiction-like behavior. The reduction in long-term memory performance upon GHB self-administration calls for further research into the cognitive effects of chronic GHB use in humans.
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Affiliation(s)
- Casper J H Wolf
- Donders Institute for Brain, Department of Psychiatry, Radboudumc, Cognition, and Behaviour, Reinier Postlaan 4, 6525 GC, Nijmegen, The Netherlands.
- Donders Institute for Brain Cognition and Behaviour, Department of Cognitive Neuroscience, Radboudumc, 6525 EN, Nijmegen, The Netherlands.
- Nijmegen Institute for Scientist-Practitioners in Addiction (NISPA), 6525 HR, Nijmegen, The Netherlands.
| | - Marcia Spoelder
- Department of Primary and Community Care, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
| | - Harmen Beurmanjer
- Nijmegen Institute for Scientist-Practitioners in Addiction (NISPA), 6525 HR, Nijmegen, The Netherlands
- Behavioural Science Institute, Radboud University, 6525 GD, Nijmegen, The Netherlands
- Novadic-Kentron Addiction Care, 5261 LX, Vught, The Netherlands
| | | | - Arnt F A Schellekens
- Donders Institute for Brain, Department of Psychiatry, Radboudumc, Cognition, and Behaviour, Reinier Postlaan 4, 6525 GC, Nijmegen, The Netherlands
- Nijmegen Institute for Scientist-Practitioners in Addiction (NISPA), 6525 HR, Nijmegen, The Netherlands
| | - Judith R Homberg
- Donders Institute for Brain Cognition and Behaviour, Department of Cognitive Neuroscience, Radboudumc, 6525 EN, Nijmegen, The Netherlands
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Nijdam TM, Jukema BN, de Fraiture EJ, Spijkerman R, Schuijt HJ, Spoelder M, Bongers CC, Hopman MT, Koenderman L, Hietbrink F, van der Velde D. Identification of neutrophil phenotype categories in geriatric hip fracture patients aids in personalized medicine. OTA Int 2023; 6:e291. [PMID: 38152436 PMCID: PMC10750458 DOI: 10.1097/oi9.0000000000000291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/25/2023] [Accepted: 10/08/2023] [Indexed: 12/29/2023]
Abstract
Objectives The number of geriatric hip fracture patients is high and expected to rise in the coming years, and many are frail and at risk for adverse outcomes. Early identification of high-risk patients is crucial to balance treatment and optimize outcome, but remains challenging. Previous research in patients with multitrauma suggested that neutrophil phenotype analysis could aid in early identification of high-risk patients. This pilot study investigated the feasibility and clinical value of neutrophil phenotype analysis in geriatric patients with a hip fracture. Methods A prospective study was conducted in a regional teaching hospital in the Netherlands. At the emergency department, blood samples were collected from geriatric patients with a hip fracture and analyzed using automated flow cytometry. Flow cytometry data were processed using an automated clustering algorithm. Neutrophil activation data were compared with a healthy control cohort. Neutrophil phenotype categories were assessed based on two-dimensional visual assessment of CD16/CD62L expression. Results Blood samples from 45 geriatric patients with a hip fracture were included. Neutrophils showed an increased activation profile and decreased responsiveness to formyl peptides when compared to healthy controls. The neutrophil phenotype of all patients was categorized. The incidence of severe adverse outcome was significantly different between the different categories (P = 0.0331). Moreover, patients with neutrophil phenotype category 0 developed no severe adverse outcomes. Conclusions Using point-of-care fully automated flow cytometry to analyze the neutrophil compartment in geriatric hip fracture patients is feasible and holds clinical value in determining patients at risk for adverse outcome. This study is a first step toward immuno-based precision medicine for identifying geriatric hip fracture patients that are deemed fit for surgery.
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Affiliation(s)
- Thomas M.P. Nijdam
- St. Antonius Ziekenhuis Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
| | - Bernard N. Jukema
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Emma J. de Fraiture
- St. Antonius Ziekenhuis Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
- University Medical Center Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
| | - Roy Spijkerman
- St. Antonius Ziekenhuis Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
| | - Henk Jan Schuijt
- St. Antonius Ziekenhuis Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
| | - Marcia Spoelder
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Coen C.W.G. Bongers
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Maria T.E. Hopman
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Leo Koenderman
- Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Falco Hietbrink
- University Medical Center Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
| | - Detlef van der Velde
- St. Antonius Ziekenhuis Utrecht, Department of Trauma Surgery, Utrecht, the Netherlands
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Spoelder M, Bright Y, Morrison MC, van Kempen V, de Groodt L, Begalli M, Schuijt N, Kruiger E, Bulthuis R, Gross G, Kleemann R, van Diepen JA, Homberg JR. Cognitive Performance during the Development of Diabetes in the Zucker Diabetic Fatty Rat. Cells 2023; 12:2463. [PMID: 37887307 PMCID: PMC10605915 DOI: 10.3390/cells12202463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/30/2023] [Accepted: 10/05/2023] [Indexed: 10/28/2023] Open
Abstract
Increased insulin levels may support the development of neural circuits involved in cognition, while chronic mild inflammation may also result in cognitive impairment. This study aimed to gain more insight into whether cognition is already impacted during adolescence in a genetic rat model for obesity and type 2 diabetes. Visual discrimination learning throughout adolescence and the level of motivation during early adulthood were investigated in Zucker Diabetic Fatty (ZDF) obese and ZDF lean rats using operant touchscreens. Blood glucose, insulin, and lipids were longitudinally analyzed. Histological analyses were performed in the liver, white adipose tissues, and the prefrontal cortex. Prior to the experiments with the genetic ZDF research model, all experimental assays were performed in two groups of outbred Long Evans rats to investigate the effect of different feeding circumstances. Adolescent ZDF obese rats outperformed ZDF lean rats on visual discrimination performance. During the longitudinal cognitive testing period, insulin levels sharply increased over weeks in ZDF obese rats and were significantly enhanced from 6 weeks of age onwards. Early signs of liver steatosis and enlarged adipocytes in white adipose tissue were observed in early adult ZDF obese rats. Histological analyses in early adulthood showed no group differences in the number of prefrontal cortex neurons and microglia, nor PSD95 and SIRT1 mRNA expression levels. Together, our data show that adolescent ZDF obese rats even display enhanced cognition despite their early diabetic profile.
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Affiliation(s)
- Marcia Spoelder
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Yami Bright
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Martine C. Morrison
- Department of Metabolic Health Research, Netherlands Organisation for Applied Scientific Research (TNO), Sylviusweg 71, 2333 CE Leiden, The Netherlands
| | - Veerle van Kempen
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Lilian de Groodt
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Malvina Begalli
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Nikita Schuijt
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Eva Kruiger
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
| | - Ronald Bulthuis
- Metris B.V., Kruisweg 829c, 2132 NG Hoofddorp, The Netherlands
| | - Gabriele Gross
- Medical and Scientific Affairs, Reckitt|Mead Johnson Nutrition Institute, Middenkampweg 2, 6545 CJ Nijmegen, The Netherlands
| | - Robert Kleemann
- Department of Metabolic Health Research, Netherlands Organisation for Applied Scientific Research (TNO), Sylviusweg 71, 2333 CE Leiden, The Netherlands
| | - Janna A. van Diepen
- Medical and Scientific Affairs, Reckitt|Mead Johnson Nutrition Institute, Middenkampweg 2, 6545 CJ Nijmegen, The Netherlands
| | - Judith R. Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands; (Y.B.)
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Spoelder M, Schoofs MCA, Raaphorst K, Lakerveld J, Wagtendonk A, Hartman YAW, van der Krabben E, Hopman MTE, Thijssen DHJ. A positive neighborhood walkability is associated with a higher magnitude of leisure walking in adults upon COVID-19 restrictions: a longitudinal cohort study. Int J Behav Nutr Phys Act 2023; 20:116. [PMID: 37752497 PMCID: PMC10521432 DOI: 10.1186/s12966-023-01512-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 09/07/2023] [Indexed: 09/28/2023] Open
Abstract
BACKGROUND Previous cross-sectional and longitudinal observational studies revealed positive relationships between contextual built environment components and walking behavior. Due to severe restrictions during COVID-19 pandemic lockdowns, physical activity was primarily performed within the immediate living area. Using this unique opportunity, we evaluated whether built environment components were associated with the magnitude of change in walking activity in adults during COVID-19 restrictions. METHODS Data on self-reported demographic characteristics and walking behaviour were extracted from the prospective longitudinal Lifelines Cohort Study in the Netherlands of participants ≥ 18 years. For our analyses, we made use of the data acquired between 2014-2017 (n = 100,285). A fifth of the participants completed the questionnaires during COVID-19 restrictive policies in July 2021 (n = 20,806). Seven spatial components were calculated for a 500m and 1650m Euclidean buffer per postal code area in GIS: population density, retail and service destination density, land use mix, street connectivity, green space density, sidewalk density, and public transport stops. Additionally, the walkability index (WI) of these seven components was calculated. Using multivariable linear regression analyses, we analyzed the association between the WI (and separate components) and the change in leisure walking minutes/week. Included demographic variables were age, gender, BMI, education, net income, occupation status, household composition and the season in which the questionnaire was filled in. RESULTS The average leisure walking time strongly increased by 127 min/week upon COVID-19 restrictions. All seven spatial components of the WI were significantly associated with an increase in leisure walking time; a 10% higher score in the individual spatial component was associated with 5 to 8 more minutes of leisure walking/week. Green space density at the 500m Euclidean buffer and side-walk density at the 1650m Euclidean buffer were associated with the highest increase in leisure walking time/week. Subgroup analysis revealed that the built environment showed its strongest impact on leisure walking time in participants not engaging in leisure walking before the COVID-19 pandemic, compared to participants who already engaged in leisure walking before the COVID-19 pandemic. CONCLUSIONS These results provide strong evidence that the built environment, corrected for individual-level characteristics, directly links to changes observed in leisure walking time during COVID-19 restrictions. Since this relation was strongest in those who did not engage in leisure walking before the COVID-19 pandemic, our results encourage new perspectives in health promotion and urban planning.
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Affiliation(s)
- Marcia Spoelder
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Philips Van Leydenlaan 15, Nijmegen, 6525 EX, The Netherlands.
- Present affiliation: Department of Primary and Community Care, Radboud Institute for Health Sciences, Radboud University Medical Center, Geert Grooteplein Noord 21, Nijmegen, 6525 EZ, The Netherlands.
| | - Merle C A Schoofs
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Philips Van Leydenlaan 15, Nijmegen, 6525 EX, The Netherlands
| | - Kevin Raaphorst
- Department of Geography, Planning and Environment, Institute for Management Research, Radboud University, Nijmegen, The Netherlands
| | - Jeroen Lakerveld
- Amsterdam UMC, Department of Epidemiology and Data Science, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Boelelaan 1089a, Amsterdam, 1081HV, The Netherlands
- Amsterdam Public Health, Health Behaviours and Chronic Diseases, Amsterdam, The Netherlands
- Upstream Team, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Alfred Wagtendonk
- Amsterdam UMC, Department of Epidemiology and Data Science, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Boelelaan 1089a, Amsterdam, 1081HV, The Netherlands
- Amsterdam Public Health, Health Behaviours and Chronic Diseases, Amsterdam, The Netherlands
- Upstream Team, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Yvonne A W Hartman
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Philips Van Leydenlaan 15, Nijmegen, 6525 EX, The Netherlands
| | - Erwin van der Krabben
- Department of Geography, Planning and Environment, Institute for Management Research, Radboud University, Nijmegen, The Netherlands
| | - Maria T E Hopman
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Philips Van Leydenlaan 15, Nijmegen, 6525 EX, The Netherlands
| | - Dick H J Thijssen
- Department of Physiology, Radboud Institute for Health Sciences, Radboud University Medical Center, Philips Van Leydenlaan 15, Nijmegen, 6525 EX, The Netherlands
- Research Institute for Sports and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
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Wolf CJH, Venselaar H, Spoelder M, Beurmanjer H, Schellekens AFA, Homberg JR. An Overview of the Putative Structural and Functional Properties of the GHBh1 Receptor through a Bioinformatics Approach. Life (Basel) 2023; 13:life13040926. [PMID: 37109455 PMCID: PMC10142108 DOI: 10.3390/life13040926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/24/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
The neurotransmitter γ-hydroxybutyric acid (GHB) is suggested to be involved in neuronal energy homeostasis processes, but the substance is also used as a recreational drug and as a prescription medication for narcolepsy. GHB has several high-affinity targets in the brain, commonly generalized as the GHB receptor. However, little is known about the structural and functional properties of GHB receptor subtypes. This opinion article discusses the literature on the putative structural and functional properties of the GHBh1 receptor subtype. GHBh1 contains 11 transmembrane helices and at least one intracellular intrinsically disordered region (IDR). Additionally, GHBh1 shows a 100% overlap in amino acid sequence with the Riboflavin (vitamin B2) transporter, which opens the possibility of a possible dual-function (transceptor) structure. Riboflavin and GHB also share specific neuroprotective properties. Further research into the GHBh1 receptor subtype may pave the way for future therapeutic possibilities for GHB.
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Affiliation(s)
- Casper J. H. Wolf
- Department of Psychiatry, Radboudumc, 6525 GC Nijmegen, The Netherlands
- Department of Cognitive Neuroscience, Donders Institute for Brain Cognition and Behaviour, Radboudumc, 6525 EN Nijmegen, The Netherlands
- Nijmegen Institute for Scientist-Practitioners in Addiction (NISPA), 6525 HR Nijmegen, The Netherlands
| | - Hanka Venselaar
- Center for Molecular and Biomolecular Informatics, Radboudumc, 6525 GA Nijmegen, The Netherlands
| | - Marcia Spoelder
- Department of Primary and Community Care, Radboudumc, 6525 GC Nijmegen, The Netherlands
| | - Harmen Beurmanjer
- Nijmegen Institute for Scientist-Practitioners in Addiction (NISPA), 6525 HR Nijmegen, The Netherlands
- Behavioural Science Institute, Radboud University, 6525 GD Nijmegen, The Netherlands
- Novadic-Kentron Addiction Care, 5261 LX Vught, The Netherlands
| | - Arnt F. A. Schellekens
- Department of Psychiatry, Radboudumc, 6525 GC Nijmegen, The Netherlands
- Nijmegen Institute for Scientist-Practitioners in Addiction (NISPA), 6525 HR Nijmegen, The Netherlands
| | - Judith R. Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain Cognition and Behaviour, Radboudumc, 6525 EN Nijmegen, The Netherlands
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9
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Spoelder M, Koopmans L, Hartman YAW, Bongers CCWG, Schoofs MCA, Eijsvogels TMH, Hopman MTE. Supplementation with Whey Protein, but Not Pea Protein, Reduces Muscle Damage Following Long-Distance Walking in Older Adults. Nutrients 2023; 15:342. [PMID: 36678213 PMCID: PMC9867418 DOI: 10.3390/nu15020342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/13/2023] Open
Abstract
Background: Adequate animal-based protein intake can attenuate exercise induced-muscle damage (EIMD) in young adults. We examined the effects of 13 days plant-based (pea) protein supplementation compared to whey protein and placebo on EIMD in active older adults. Methods: 47 Physically active older adults (60+ years) were randomly allocated to the following groups: (I) whey protein (25 g/day), (II) pea protein (25 g/day) or (III) iso-caloric placebo. Blood concentrations of creatine kinase (CK) and lactate dehydrogenase (LDH), and skeletal muscle mass, muscle strength and muscle soreness were measured prior to and 24 h, 48 h and 72 h after a long-distance walking bout (20−30 km). Results: Participants walked 20−30 km and 2 dropped out, leaving n = 15 per subgroup. The whey group showed a significant attenuation of the increase in EIMD at 24 h post-exercise compared to the pea and placebo group (CK concentration: 175 ± 90 versus 300 ± 309 versus 330 ± 165, p = p < 0.001). No differences in LDH levels, muscle strength, skeletal muscle mass and muscle soreness were observed across groups (all p-values > 0.05). Conclusions: Thirteen days of pea protein supplementation (25 g/day) does not attenuate EIMD in older adults following a single bout of prolonged walking exercise, whereas the whey protein supplementation group showed significantly lower post-exercise CK concentrations.
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Affiliation(s)
| | | | | | | | | | | | - Maria T. E. Hopman
- Radboud Institute for Health Sciences, Department of Physiology, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
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10
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Bijlsma A, Omrani A, Spoelder M, Verharen JPH, Bauer L, Cornelis C, de Zwart B, van Dorland R, Vanderschuren LJMJ, Wierenga CJ. Social Play Behavior Is Critical for the Development of Prefrontal Inhibitory Synapses and Cognitive Flexibility in Rats. J Neurosci 2022; 42:8716-8728. [PMID: 36253083 PMCID: PMC9671579 DOI: 10.1523/jneurosci.0524-22.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 08/12/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
Sensory driven activity during early life is critical for setting up the proper connectivity of the sensory cortices. We ask here whether social play behavior, a particular form of social interaction that is highly abundant during postweaning development, is equally important for setting up connections in the developing prefrontal cortex (PFC). Young male rats were deprived from social play with peers during the period in life when social play behavior normally peaks [postnatal day 21-42] (SPD rats), followed by resocialization until adulthood. We recorded synaptic currents in layer 5 cells in slices from medial PFC of adult SPD and control rats and observed that inhibitory synaptic currents were reduced in SPD slices, while excitatory synaptic currents were unaffected. This was associated with a decrease in perisomatic inhibitory synapses from parvalbumin-positive GABAergic cells. In parallel experiments, adult SPD rats achieved more reversals in a probabilistic reversal learning (PRL) task, which depends on the integrity of the PFC, by using a more simplified cognitive strategy than controls. Interestingly, we observed that one daily hour of play during SPD partially rescued the behavioral performance in the PRL, but did not prevent the decrease in PFC inhibitory synaptic inputs. Our data demonstrate the importance of unrestricted social play for the development of inhibitory synapses in the PFC and cognitive skills in adulthood and show that specific synaptic alterations in the PFC can result in a complex behavioral outcome.SIGNIFICANCE STATEMENT This study addressed the question whether social play behavior in juvenile rats contributes to functional development of the prefrontal cortex (PFC). We found that rats that had been deprived from juvenile social play (social play deprivation - SPD) showed a reduction in inhibitory synapses in the PFC and a simplified strategy to solve a complex behavioral task in adulthood. Providing one daily hour of play during SPD partially rescued the cognitive skills in these rats, but did not prevent the reduction in PFC inhibitory synapses. Our results demonstrate a key role for unrestricted juvenile social play in PFC development and emphasize the complex relation between PFC circuit connectivity and cognitive function.
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Affiliation(s)
- Ate Bijlsma
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Azar Omrani
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
- Department of Translational Neuroscience, University Medical Center Utrecht, 3584 CG, Utrecht, The Netherlands
| | - Marcia Spoelder
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Jeroen P H Verharen
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
- Department of Translational Neuroscience, University Medical Center Utrecht, 3584 CG, Utrecht, The Netherlands
| | - Lisa Bauer
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | - Cosette Cornelis
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Beleke de Zwart
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - René van Dorland
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | - Louk J M J Vanderschuren
- Department of Population Health Sciences, Section Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, 3584 CM, Utrecht, The Netherlands
| | - Corette J Wierenga
- Department of Biology, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
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11
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Schoofs MCA, Bakker EA, de Vries F, Hartman YAW, Spoelder M, Thijssen DHJ, Eijsvogels TMH, Buffart LM, Hopman MTE. Impact of Dutch COVID-19 restrictive policy measures on physical activity behavior and identification of correlates of physical activity changes: a cohort study. BMC Public Health 2022; 22:147. [PMID: 35062927 PMCID: PMC8777413 DOI: 10.1186/s12889-022-12560-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 12/29/2021] [Indexed: 12/22/2022] Open
Abstract
Abstract
Background
Identification of characteristics of individuals that are related to decreases in physical activity (PA) levels during lockdown is needed to develop targeted-interventions. This study aims to evaluate changes in domain-specific (i.e. leisure time, transportation, occupational, and household) and total PA due to the Dutch COVID-19 lockdown, which started on March 15 2020. Furthermore, we aim to identify demographic, health-related, and psychological correlates of these changes.
Methods
Individuals who participated in the Nijmegen Exercise Study during 2017-2019 were invited to this study, which was conducted between April 16 and May 12 2020. Participant characteristics (i.e. age, sex, body mass index (BMI), marital status, education, household composition, and occupation status), living environment (i.e. housing type and degree of urbanization), psychological characteristics (i.e. resilience, outcome expectations, vitality, and mental health), and medical history were collected via an online questionnaire. Short Questionnaire to Assess Health-enhancing physical activity was used to assess PA behavior before and during lockdown. Wilcoxon signed-rank test was used to compare PA levels, in metabolic equivalent of task (MET)-minutes per week (min/wk), before and during lockdown. Multivariable linear regression analyses were performed to examine correlates of PA changes.
Results
4033 participants (57% male; 59 ± 13 years) were included. PA decreased significantly during lockdown with mean ± SD changes of 393 ± 2735 MET-min/wk for total, 133 ± 785 MET-min/wk for transportation, 137 ± 1469 MET-min/wk for occupation, and 136 ± 1942 MET-min/wk for leisure time PA. Household PA did not change significantly. Unemployment, COVID-19-related occupational changes, higher BMI, and living in an apartment or semi-detached/terraced house were significantly related to larger decreases in total and domain-specific PA. Higher vitality was related to smaller decreases in total and domain-specific PA. Higher age was significantly associated with a larger decrease in leisure time PA. Lower education was associated with smaller decreases in transportation and occupational PA compared to higher education.
Conclusion
PA levels significantly reduced during lockdown compared to before lockdown. Declines were observed during transportation and occupation, but were not compensated by an increase in leisure time PA. We identified subgroups that were more susceptible to reductions in domain-specific or total PA levels and should therefore be encouraged to increase their PA levels during lockdown.
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12
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Docq S, Spoelder M, Wang W, Homberg JR. The Protective and Long-Lasting Effects of Human Milk Oligosaccharides on Cognition in Mammals. Nutrients 2020; 12:nu12113572. [PMID: 33233361 PMCID: PMC7700157 DOI: 10.3390/nu12113572] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/19/2020] [Accepted: 11/19/2020] [Indexed: 12/22/2022] Open
Abstract
Over the last few years, research indicated that Human Milk Oligosaccharides (HMOs) may serve to enhance cognition during development. HMOs hereby provide an exciting avenue in the understanding of the molecular mechanisms that contribute to cognitive development. Therefore, this review aims to summarize the reported observations regarding the effects of HMOs on memory and cognition in rats, mice and piglets. Our main findings illustrate that the administration of fucosylated (single or combined with Lacto-N-neoTetraose (LNnT) and other oligosaccharides) and sialylated HMOs results in marked improvements in spatial memory and an accelerated learning rate in operant tasks. Such beneficial effects of HMOs on cognition already become apparent during infancy, especially when the behavioural tasks are cognitively more demanding. When animals age, its effects become increasingly more apparent in simpler tasks as well. Furthermore, the combination of HMOs with other oligosaccharides yields different effects on memory performance as opposed to single HMO administration. In addition, an enhanced hippocampal long-term potentiation (LTP) response both at a young and at a mature age are reported as well. These results point towards the possibility that HMOs administered either in singular or combination forms have long-lasting, beneficial effects on memory and cognition in mammals.
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Affiliation(s)
- Sylvia Docq
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6525 EN Nijmegen, The Netherlands; (S.D.); (M.S.)
| | - Marcia Spoelder
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6525 EN Nijmegen, The Netherlands; (S.D.); (M.S.)
| | - Wendan Wang
- Inner Mongolia Yili Industrial Group, Co., Ltd., Jinshan road 1, Hohhot 010110, China;
| | - Judith R. Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6525 EN Nijmegen, The Netherlands; (S.D.); (M.S.)
- Correspondence: ; Tel.: +31-24-3610906
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13
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Hanswijk SI, Spoelder M, Shan L, Verheij MMM, Muilwijk OG, Li W, Liu C, Kolk SM, Homberg JR. Gestational Factors throughout Fetal Neurodevelopment: The Serotonin Link. Int J Mol Sci 2020; 21:E5850. [PMID: 32824000 PMCID: PMC7461571 DOI: 10.3390/ijms21165850] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/24/2020] [Accepted: 08/11/2020] [Indexed: 12/21/2022] Open
Abstract
Serotonin (5-HT) is a critical player in brain development and neuropsychiatric disorders. Fetal 5-HT levels can be influenced by several gestational factors, such as maternal genotype, diet, stress, medication, and immune activation. In this review, addressing both human and animal studies, we discuss how these gestational factors affect placental and fetal brain 5-HT levels, leading to changes in brain structure and function and behavior. We conclude that gestational factors are able to interact and thereby amplify or counteract each other's impact on the fetal 5-HT-ergic system. We, therefore, argue that beyond the understanding of how single gestational factors affect 5-HT-ergic brain development and behavior in offspring, it is critical to elucidate the consequences of interacting factors. Moreover, we describe how each gestational factor is able to alter the 5-HT-ergic influence on the thalamocortical- and prefrontal-limbic circuitry and the hypothalamo-pituitary-adrenocortical-axis. These alterations have been associated with risks to develop attention deficit hyperactivity disorder, autism spectrum disorders, depression, and/or anxiety. Consequently, the manipulation of gestational factors may be used to combat pregnancy-related risks for neuropsychiatric disorders.
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Affiliation(s)
- Sabrina I. Hanswijk
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Centre, 6525 EN Nijmegen, The Netherlands; (S.I.H.); (M.S.); (M.M.M.V.); (O.G.M.)
| | - Marcia Spoelder
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Centre, 6525 EN Nijmegen, The Netherlands; (S.I.H.); (M.S.); (M.M.M.V.); (O.G.M.)
| | - Ling Shan
- Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Sciences, 1105 BA Amsterdam, The Netherlands;
| | - Michel M. M. Verheij
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Centre, 6525 EN Nijmegen, The Netherlands; (S.I.H.); (M.S.); (M.M.M.V.); (O.G.M.)
| | - Otto G. Muilwijk
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Centre, 6525 EN Nijmegen, The Netherlands; (S.I.H.); (M.S.); (M.M.M.V.); (O.G.M.)
| | - Weizhuo Li
- College of Medical Laboratory, Dalian Medical University, Dalian 116044, China; (W.L.); (C.L.)
| | - Chunqing Liu
- College of Medical Laboratory, Dalian Medical University, Dalian 116044, China; (W.L.); (C.L.)
| | - Sharon M. Kolk
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behavior, Radboud University, 6525 AJ Nijmegen, The Netherlands;
| | - Judith R. Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Centre, 6525 EN Nijmegen, The Netherlands; (S.I.H.); (M.S.); (M.M.M.V.); (O.G.M.)
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14
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Spoelder M, Flores Dourojeanni JP, de Git KCG, Baars AM, Lesscher HMB, Vanderschuren LJMJ. Individual differences in voluntary alcohol intake in rats: relationship with impulsivity, decision making and Pavlovian conditioned approach. Psychopharmacology (Berl) 2017; 234:2177-2196. [PMID: 28417164 PMCID: PMC5486936 DOI: 10.1007/s00213-017-4617-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 03/30/2017] [Indexed: 12/23/2022]
Abstract
RATIONALE Alcohol use disorder (AUD) has been associated with suboptimal decision making, exaggerated impulsivity, and aberrant responses to reward-paired cues, but the relationship between AUD and these behaviors is incompletely understood. OBJECTIVES This study aims to assess decision making, impulsivity, and Pavlovian-conditioned approach in rats that voluntarily consume low (LD) or high (HD) amounts of alcohol. METHODS LD and HD were tested in the rat gambling task (rGT) or the delayed reward task (DRT). Next, the effect of alcohol (0-1.0 g/kg) was tested in these tasks. Pavlovian-conditioned approach (PCA) was assessed both prior to and after intermittent alcohol access (IAA). Principal component analyses were performed to identify relationships between the most important behavioral parameters. RESULTS HD showed more optimal decision making in the rGT. In the DRT, HD transiently showed reduced impulsive choice. In both LD and HD, alcohol treatment increased optimal decision making in the rGT and increased impulsive choice in the DRT. PCA prior to and after IAA was comparable for LD and HD. When PCA was tested after IAA only, HD showed a more sign-tracking behavior. The principal component analyses indicated dimensional relationships between alcohol intake, impulsivity, and sign-tracking behavior in the PCA task after IAA. CONCLUSIONS HD showed a more efficient performance in the rGT and DRT. Moreover, alcohol consumption enhanced approach behavior to reward-predictive cues, but sign-tracking did not predict the level of alcohol consumption. Taken together, these findings suggest that high levels of voluntary alcohol intake are associated with enhanced cue- and reward-driven behavior.
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Affiliation(s)
- Marcia Spoelder
- 0000000120346234grid.5477.1Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584CM Utrecht, The Netherlands ,0000 0004 0444 9382grid.10417.33Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Jacques P. Flores Dourojeanni
- 0000000120346234grid.5477.1Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584CM Utrecht, The Netherlands ,0000000090126352grid.7692.aDepartment of Translational Neuroscience, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kathy C. G. de Git
- 0000000120346234grid.5477.1Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584CM Utrecht, The Netherlands ,0000000090126352grid.7692.aDepartment of Translational Neuroscience, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Annemarie M. Baars
- 0000000120346234grid.5477.1Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584CM Utrecht, The Netherlands
| | - Heidi M. B. Lesscher
- 0000000120346234grid.5477.1Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584CM Utrecht, The Netherlands
| | - Louk J. M. J. Vanderschuren
- 0000000120346234grid.5477.1Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584CM Utrecht, The Netherlands
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15
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Spoelder M, Hesseling P, Styles M, Baars AM, Lozeman-van 't Klooster JG, Lesscher HMB, Vanderschuren LJMJ. Dopaminergic neurotransmission in ventral and dorsal striatum differentially modulates alcohol reinforcement. Eur J Neurosci 2016; 45:147-158. [PMID: 27521051 DOI: 10.1111/ejn.13358] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 07/14/2016] [Accepted: 08/02/2016] [Indexed: 01/18/2023]
Abstract
Dopaminergic neurotransmission in the striatum has been widely implicated in the reinforcing properties of substances of abuse. However, the striatum is functionally heterogeneous, and previous work has mostly focused on psychostimulant drugs. Therefore, we investigated how dopamine within striatal subregions modulates alcohol-directed behaviour in rats. We assessed the effects of infusion of the dopamine receptor antagonist alpha-flupenthixol into the shell and core of the nucleus accumbens (NAcc) and the dorsolateral striatum (DLS) on responding for alcohol under fixed ratio 1 (FR1) and progressive ratio (PR) schedules of reinforcement. Bilateral infusion of alpha-flupenthixol into the NAcc shell reduced responding for alcohol under both the FR1 (15 μg/side) and the PR schedule (3.75-15 μg/side) of reinforcement. Infusion of alpha-flupenthixol into the NAcc core (7.5-15 μg/side) also decreased responding for alcohol under both schedules. By contrast, alpha-flupenthixol infusion into the DLS did not affect FR1 responding, but reduced responding under the PR schedule (15 μg/side). The decreases in responding were related to earlier termination of responding during the session, whereas the onset and rate of responding remained largely unaffected. Together, these data suggest that dopamine in the NAcc shell is involved in the incentive motivation for alcohol, whereas DLS dopamine comes into play when obtaining alcohol requires high levels of effort. In contrast, NAcc core dopamine appears to play a more general role in alcohol reinforcement. In conclusion, dopaminergic neurotransmission acts in concert in subregions of the striatum to modulate different aspects of alcohol-directed behaviour.
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Affiliation(s)
- Marcia Spoelder
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Peter Hesseling
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Matthew Styles
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Annemarie M Baars
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - José G Lozeman-van 't Klooster
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Heidi M B Lesscher
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
| | - Louk J M J Vanderschuren
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, The Netherlands
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16
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Spoelder M, Hesseling P, Baars AM, Lozeman-van ‘t Klooster JG, Rotte MD, Vanderschuren LJMJ, Lesscher HMB. Individual Variation in Alcohol Intake Predicts Reinforcement, Motivation, and Compulsive Alcohol Use in Rats. Alcohol Clin Exp Res 2015; 39:2427-37. [DOI: 10.1111/acer.12891] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/30/2015] [Indexed: 01/24/2023]
Affiliation(s)
- Marcia Spoelder
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
| | - Peter Hesseling
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
| | - Annemarie M. Baars
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
| | - José G. Lozeman-van ‘t Klooster
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
| | - Marthe D. Rotte
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
| | - Louk J. M. J. Vanderschuren
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
- Department of Translational Neuroscience (LJMJV); Brain Center Rudolf Magnus; University Medical Center Utrecht; Utrecht the Netherlands
| | - Heidi M. B. Lesscher
- Faculty of Veterinary Medicine; Department of Animals in Science and Society; Division of Behavioural Neuroscience; Utrecht University; Utrecht the Netherlands
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Spoelder M, Tsutsui KT, Lesscher HMB, Vanderschuren LJMJ, Clark JJ. Adolescent Alcohol Exposure Amplifies the Incentive Value of Reward-Predictive Cues Through Potentiation of Phasic Dopamine Signaling. Neuropsychopharmacology 2015; 40:2873-85. [PMID: 25971592 PMCID: PMC4864623 DOI: 10.1038/npp.2015.139] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 05/01/2015] [Accepted: 05/01/2015] [Indexed: 11/09/2022]
Abstract
Adolescent alcohol use remains a major public health concern due in part to well-established findings implicating the age of onset in alcohol use in the development of alcohol use disorders and persistent decision-making deficits in adults. We have previously demonstrated that moderate adolescent alcohol consumption in rats promotes suboptimal decision making and an associated perturbation in mesolimbic dopamine transmission in adulthood. Dopamine-dependent incentive learning processes are an integral component of value-based decision making and a fundamental element to many theoretical accounts of addiction. Thus we tested the hypothesis that adolescent alcohol use selectively alters incentive learning processes through perturbation of mesolimbic dopamine systems. To assess incentive learning, behavioral and neurochemical measurements were made during the acquisition, maintenance, extinction, and reacquisition of a Pavlovian conditioned approach procedure in adult rats with a history of adolescent alcohol consumption. We show that moderate adolescent alcohol consumption potentiates stimulus-evoked phasic dopamine transmission, measured in vivo by fast-scan cyclic voltammetry, in adulthood and biases individuals toward a dopamine-dependent incentive learning strategy. Moreover, we demonstrate that animals exposed to alcohol in adolescence are more sensitive to an unexpected variation in reward outcomes. This pattern of phasic dopamine signaling and the associated bias in learning may provide a mechanism for the well-documented vulnerability of individuals with early-life alcohol use for alcohol use disorders in adulthood.
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Affiliation(s)
- Marcia Spoelder
- Department of Animals in Science and Society, Division of Behavioral Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Kimberly T Tsutsui
- Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, Washington, USA
| | - Heidi M B Lesscher
- Department of Animals in Science and Society, Division of Behavioral Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Louk J M J Vanderschuren
- Department of Animals in Science and Society, Division of Behavioral Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands,Department of Translational Neuroscience, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jeremy J Clark
- Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, Washington, USA,Department of Psychiatry and Behavioral Sciences, University of Washington, Box 356560, 1959 NW Pacific Street, Seattle, WA 98195, USA, Tel: +1 206 992 0472, Fax: +1 206 543 9520, E-mail:
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Spoelder M, Lesscher HMB, Hesseling P, Baars AM, Lozeman-van t Klooster JG, Mijnsbergen R, Vanderschuren LJMJ. Altered performance in a rat gambling task after acute and repeated alcohol exposure. Psychopharmacology (Berl) 2015. [PMID: 26220611 PMCID: PMC4561076 DOI: 10.1007/s00213-015-4020-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
RATIONALE A bidirectional relationship between alcohol use disorder (AUD) and deficits in impulse control and decision making has been suggested. However, the mechanisms by which neurocognitive impairments predispose to, or result from AUD remain incompletely understood. OBJECTIVES The aim of this study is to gain more insight in the effects of alcohol exposure on decision making and impulse control. We used two modified versions of the rat gambling task (rGT) that differ in the net gain and the punishment magnitude associated with the different response options. METHODS In experiment 1, we assessed the effects of acute alcohol treatment (0-0.8 g/kg) on rGT performance. In experiment 2, we determined the effects of alcohol on rGT acquisition (15 sessions, 0.6 g/kg). Next, these animals were challenged with alcohol (0-1.0 g/kg) prior to rGT sessions. RESULTS Acute alcohol treatment suppressed baseline performance in both rGT versions but only modestly altered decision making. Treatment with alcohol during acquisition increased risky choices in the rGT version that involved larger punishment and blunted the reduction in win-shift behavior during acquisition in both rGT versions. Moreover, rats treated with alcohol during acquisition showed an increase in premature and perseverative responding upon subsequent alcohol challenges (0-1.0 g/kg) and were less sensitive to the behavioral suppressant effects of alcohol. CONCLUSIONS Our results show that repeated alcohol exposure alters decision making during rGT acquisition and reduces the ability to adjust choice behavior on the basis of feedback. In addition, repeated alcohol exposure unmasks its behavioral disinhibitory effects in the rGT. Impaired responsiveness to choice feedback and behavioral disinhibition may contribute to the development of AUD.
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Affiliation(s)
- Marcia Spoelder
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
| | - Heidi M. B. Lesscher
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
| | - Peter Hesseling
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
| | - Annemarie M. Baars
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
| | - José G. Lozeman-van t Klooster
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
| | - Rob Mijnsbergen
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands
| | - Louk J. M. J. Vanderschuren
- />Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, The Netherlands , />Department of Translational Neuroscience, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
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Caprioli D, Sawiak SJ, Merlo E, Theobald DEH, Spoelder M, Jupp B, Voon V, Carpenter TA, Everitt BJ, Robbins TW, Dalley JW. Gamma aminobutyric acidergic and neuronal structural markers in the nucleus accumbens core underlie trait-like impulsive behavior. Biol Psychiatry 2014; 75:115-23. [PMID: 23973096 PMCID: PMC3898085 DOI: 10.1016/j.biopsych.2013.07.013] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 07/08/2013] [Accepted: 07/09/2013] [Indexed: 01/10/2023]
Abstract
BACKGROUND Pathological forms of impulsivity are manifest in a number of psychiatric disorders listed in DSM-5, including attention-deficit/hyperactivity disorder and substance use disorder. However, the molecular and cellular substrates of impulsivity are poorly understood. Here, we investigated a specific form of motor impulsivity in rats, namely premature responding, on a five-choice serial reaction time task. METHODS We used in vivo voxel-based magnetic resonance imaging and ex vivo Western blot analyses to investigate putative structural, neuronal, and glial protein markers in low-impulsive (LI) and high-impulsive rats. We also investigated whether messenger RNA interference targeting glutamate decarboxylase 65/67 (GAD65/67) gene expression in the nucleus accumbens core (NAcbC) is sufficient to increase impulsivity in LI rats. RESULTS We identified structural and molecular abnormalities in the NAcbC associated with motor impulsivity in rats. We report a reduction in gray matter density in the left NAcbC of high-impulsive rats, with corresponding reductions in this region of glutamate decarboxylase (GAD65/67) and markers of dendritic spines and microtubules. We further demonstrate that the experimental reduction of de novo of GAD65/67 expression bilaterally in the NAcbC is sufficient to increase impulsivity in LI rats. CONCLUSIONS These results reveal a novel mechanism of impulsivity in rats involving gamma aminobutyric acidergic and structural abnormalities in the NAcbC with potential relevance to the etiology and treatment of attention-deficit/hyperactivity disorder and related disorders.
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Affiliation(s)
- Daniele Caprioli
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom.
| | - Stephen J Sawiak
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom; Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Emiliano Merlo
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - David E H Theobald
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Marcia Spoelder
- Division Neurobiology of Behaviour, Department of Animals in Science and Society, Utrecht University, Utrecht, The Netherlands
| | - Bianca Jupp
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Valerie Voon
- Cambridgeshire and Peterborough National Health Service Foundation Trust, Cambridge, United Kingdom
| | - T Adrian Carpenter
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom; Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Barry J Everitt
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Trevor W Robbins
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Jeffrey W Dalley
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom; Department of Psychiatry, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
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Fernando ABP, Economidou D, Theobald DE, Zou MF, Newman AH, Spoelder M, Caprioli D, Moreno M, Hipόlito L, Aspinall AT, Robbins TW, Dalley JW. Modulation of high impulsivity and attentional performance in rats by selective direct and indirect dopaminergic and noradrenergic receptor agonists. Psychopharmacology (Berl) 2012; 219:341-52. [PMID: 21761147 PMCID: PMC3249163 DOI: 10.1007/s00213-011-2408-z] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Accepted: 06/18/2011] [Indexed: 12/31/2022]
Abstract
RATIONALE Impulsivity is associated with a number of psychiatric disorders, most notably attention deficit/hyperactivity disorder (ADHD). Drugs that augment catecholamine function (e.g. methylphenidate and the selective noradrenaline reuptake inhibitor atomoxetine) have clinical efficacy in ADHD, but their precise mechanism of action is unclear. OBJECTIVE The objective of this study is to investigate the relative contribution of dopamine (DA) and noradrenaline (NA) to the therapeutic effects of clinically effective drugs in ADHD using rats selected for high impulsivity on the five-choice serial reaction time task (5CSRTT). METHODS We examined the effects of direct and indirect DA and NA receptor agonists and selective DA and NA reuptake inhibitors in rats showing high and low levels of impulsivity on the 5CSRTT (designated high impulsive 'HI' and low impulsive 'LI', respectively). Drugs were administered by systemic injection in a randomized, counterbalanced manner. RESULTS Low doses of quinpirole (a D2/D3 agonist) and sumanirole (a D2 agonist) selectively reduced impulsivity on the 5CSRTT, whilst higher doses resulted in increased omissions and slower response latencies. The NA reuptake inhibitor, atomoxetine, and the alpha-2 adrenoreceptor agonist, guanfacine, dose dependently decreased premature responding. The dopaminergic reuptake inhibitor GBR-12909 increased impulsivity, whereas the nonselective DA and NA reuptake inhibitor methylphenidate had no significant effect on impulsive responses in HI and LI rats. CONCLUSIONS These findings indicate that high impulsivity can be ameliorated in rats by drugs that mimic the effects of DA and NA, just as in ADHD, and that activation of D2/3 receptors selectively decreases high impulsivity on the 5CSRTT.
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Affiliation(s)
- Anushka B. P. Fernando
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK
| | - Daina Economidou
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK
| | - David E. Theobald
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK
| | - Mu-Fa Zou
- Medicinal Chemistry Section, National Institute on Drug Abuse-Intramural Research Program, National Institutes of Health, Baltimore, MD USA
| | - Amy H. Newman
- Medicinal Chemistry Section, National Institute on Drug Abuse-Intramural Research Program, National Institutes of Health, Baltimore, MD USA
| | - Marcia Spoelder
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK
| | - Daniele Caprioli
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK
| | - Margarita Moreno
- Department of Neuroscience and Health Sciences, University of Almeria, Almeria, Spain
| | - Lucia Hipόlito
- Depto. Farmacia i Technologia Farmaceutica, University of Valencia, Valencia, Spain
| | - Albert T. Aspinall
- School of Psychology, The University of St Andrews, St Mary’s College, South Street, St Andrews, Fife, KY16 9JP UK
| | - Trevor W. Robbins
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK
| | - Jeffrey W. Dalley
- Behavioural and Clinical Neuroscience Institute and Department of Experimental Psychology, University of Cambridge, Downing St, Cambridge, CB2 3EB UK ,Department of Psychiatry, University of Cambridge, Addenbrooke’s Hospital, Cambridge, CB2 2QQ UK
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