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Grigsby K, Usmani Z, Anderson J, Ozburn A. Development and implementation of a Dependable, Simple, and Cost-effective (DSC), open-source running wheel in High Drinking in the Dark and Heterogeneous Stock/Northport mice. Front Behav Neurosci 2024; 17:1321349. [PMID: 38288095 PMCID: PMC10823001 DOI: 10.3389/fnbeh.2023.1321349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 12/14/2023] [Indexed: 01/31/2024] Open
Abstract
Maintaining healthy and consistent levels of physical activity (PA) is a clinically proven and low-cost means of reducing the onset of several chronic diseases and may provide an excellent strategy for managing mental health and related outcomes. Wheel-running (WR) is a well-characterized rodent model of voluntary PA; however, its use in biomedical research is limited by economical and methodical constraints. Here, we showcase the DSC (Dependable, Simple, Cost-effective), open-source running wheel by characterizing 24-h running patterns in two genetically unique mouse lines: inbred High Drinking in the Dark line 1 [iHDID-1; selectively bred to drink alcohol to intoxication (and then inbred to maintain phenotype)] and Heterogeneous Stock/Northport (HS/Npt; the genetically heterogeneous founders of iHDID mice). Running distance (km/day), duration (active minutes/day) and speed (km/hour) at 13-days (acute WR; Experiment 1) and 28-days (chronic WR; Experiment 2) were comparable to other mouse strains, suggesting the DSC-wheel reliably captures murine WR behavior. Analysis of 24-h running distance supports previous findings, wherein iHDID-1 mice tend to run less than HS/Npt mice in the early hours of the dark phase and more than HS/Npt in the late hours of dark phase/early light phase. Moreover, circadian actograms were generated to highlight the broad application of our wheel design across disciplines. Overall, the present findings demonstrate the ability of the DSC-wheel to function as a high-throughput and precise tool to comprehensively measure WR behaviors in mice.
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Affiliation(s)
- Kolter Grigsby
- Portland Veterans Affairs Medical Center, Research and Development Service, Portland, OR, United States
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Zaynah Usmani
- Portland Veterans Affairs Medical Center, Research and Development Service, Portland, OR, United States
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Justin Anderson
- Portland Veterans Affairs Medical Center, Research and Development Service, Portland, OR, United States
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Angela Ozburn
- Portland Veterans Affairs Medical Center, Research and Development Service, Portland, OR, United States
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
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Mao X, Grigsby KB, Kelty TJ, Kerr NR, Childs TE, Booth FW. Transcriptomic analysis reveals novel molecular signaling networks involved in low voluntary running behavior after AP-1 inhibition. Neuroscience 2023; 509:173-186. [PMID: 36395916 DOI: 10.1016/j.neuroscience.2022.11.008] [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: 05/23/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022]
Abstract
Understanding the neuro-molecular mechanisms that mediate the quantity of daily physical activity (PA) level is of medical significance, given the tremendous health benefits associated with greater physical activity. Here, we examined the effects of intra-nucleus accumbens (NAc) inhibition of activator protein-1 (AP-1), an important transcriptional factor downstream of cAMP response element binding protein (CREB; a reward-related transcriptional regulator), on voluntary wheel running behavior in wild-type (WT) and low voluntary running (LVR) female rats. Transcriptome analysis of the nucleus accumbens (NAc; a brain region critical for PA reward and motivation) was performed to further determine molecular responses to intra-NAc AP-1 inhibition in these rat lines. Within WT rats, intra-NAc AP-1 inhibition caused a significant decrease in overnight running distance in comparison to control rats (p = 0.009). Transcriptomic and bioinformatic analysis in WT rats identified involvement of gene products that regulate cellular proliferation and development, which were cellular processes regulated by AP-1. In contrast to above decreased WT distances, intra-NAc AP-1 inhibition in LVR rats increased nightly running distance in comparison to LVR control rats (p = 0.0008). Further analysis identified gene products that are associated with regulating intracellular Ca2+ homeostasis, calcium ion binding and neuronal excitability. In short, our study aims to gain a comprehensive understanding of transcriptional profile that was due to AP-1 inhibition in NAc, in which it could not only enhance the knowledge regarding molecular regulatory loops within NAc for modulating voluntary running behavior, but also provide further insights into molecular targets for future investigations.
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Affiliation(s)
- Xuansong Mao
- Department of Biomedical Sciences, University of Missouri, Columbia 65211, MO, USA
| | - Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia 65211, MO, USA
| | - Taylor J Kelty
- Department of Biomedical Sciences, University of Missouri, Columbia 65211, MO, USA
| | - Nathan R Kerr
- Department of Biomedical Sciences, University of Missouri, Columbia 65211, MO, USA
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia 65211, MO, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia 65211, MO, USA; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia 65211, MO, USA; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia 65211, MO, USA; Dalton Cardiovascular Research Center, University of Missouri, Columbia 65211, MO, USA.
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Grigsby KB, Kerr NR, Kelty TJ, Mao X, Childs TE, Booth FW. Acute Wheel-Running Increases Markers of Stress and Aversion-Related Signaling in the Basolateral Amygdala of Male Rats. J Funct Morphol Kinesiol 2022; 8:jfmk8010006. [PMID: 36648898 PMCID: PMC9844436 DOI: 10.3390/jfmk8010006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/18/2022] [Accepted: 12/23/2022] [Indexed: 01/04/2023] Open
Abstract
Physical activity (PA) is a non-invasive, cost-effective means of reducing chronic disease. Most US citizens fail to meet PA guidelines, and individuals experiencing chronic stress are less likely to be physically active. To better understand the barriers to maintaining active lifestyles, we sought to determine the extent to which short- versus long-term PA increases stress- and aversion-related markers in wild-type (WT) and low voluntary running (LVR) rats, a unique genetic model of low physical activity motivation. Here, we tested the effects of 1 and 4 weeks of voluntary wheel-running on physiological, behavioral, and molecular measures of stress and Hypothalamic Pituitary Adrenal (HPA)-axis responsiveness (corticosterone levels, adrenal wet weights, and fecal boli counts). We further determined measures of aversion-related signaling (kappa opioid receptor, dynorphin, and corticotropin releasing hormone mRNA expression) in the basolateral amygdala (BLA), a brain region well characterized for its role in anxiety and aversion. Compared to sedentary values, 1, but not 4 weeks of voluntary wheel-running increased adrenal wet weights and plasma corticosterone levels, suggesting that HPA responsiveness normalizes following long-term PA. BLA mRNA expression of prodynorphin (Pdyn) was significantly elevated in WT and LVR rats following 1 week of wheel-running compared to sedentary levels, suggesting that aversion-related signaling is elevated following short- but not long-term wheel-running. In all, it appears that the stress effects of acute PA may increase molecular markers associated with aversion in the BLA, and that LVR rats may be more sensitive to these effects, providing a potential neural mechanism for their low PA motivation.
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Affiliation(s)
- Kolter B. Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
- Department of Behavioral Neuroscience, Oregon Health & Science University, and VA Portland Health Care System, Portland, OR 97239, USA
- Correspondence: (K.B.G.); (N.R.K.)
| | - Nathan R. Kerr
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
- Correspondence: (K.B.G.); (N.R.K.)
| | - Taylor J. Kelty
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Xuansong Mao
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Thomas E. Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Frank W. Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65211, USA
- Department of Physiology, University of Missouri, Columbia, MO 65211, USA
- Dalton Cardiovascular Center, University of Missouri, Columbia, MO 65211, USA
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Tanner MK, Davis JKP, Jaime J, Moya NA, Hohorst AA, Bonar K, Abrams KA, Jamil N, Han R, Hubert TJ, Brown N, Loetz EC, Greenwood BN. Duration- and sex-dependent neural circuit control of voluntary physical activity. Psychopharmacology (Berl) 2022; 239:3697-3709. [PMID: 36195731 PMCID: PMC9768838 DOI: 10.1007/s00213-022-06243-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 09/20/2022] [Indexed: 10/10/2022]
Abstract
RATIONALE Exercise participation remains low despite clear benefits. Rats engage in voluntary wheel running (VWR) that follows distinct phases of acquisition, during which VWR escalates, and maintenance, during which VWR remains stable. Understanding mechanisms driving acquisition and maintenance of VWR could lead to novel strategies to promote exercise. The two phases of VWR resemble those that occur during operant conditioning and, therefore, might involve similar neural substrates. The dorsomedial (DMS) dorsal striatum (DS) supports the acquisition of operant conditioning, whereas the dorsolateral striatum (DLS) supports its maintenance. OBJECTIVES Here we sought to characterize the roles of DS subregions in VWR. Females escalate VWR and operant conditioning faster than males. Thus, we also assessed for sex differences. METHODS To determine the causal role of DS subregions in VWR, we pharmacologically inactivated the DMS or DLS of adult, male and female, Long-Evans rats during the two phases of VWR. The involvement of DA receptor 1 (D1)-expressing neurons in the DS was investigated by quantifying cfos mRNA within this neuronal population. RESULTS We observed that, in males, the DMS and DLS are critical for VWR exclusively during acquisition and maintenance, respectively. In females, the DMS is also critical only during acquisition, but the DLS contributes to VWR during both VWR phases. DLS D1 neurons could be an important driver of VWR escalation during acquisition. CONCLUSIONS The acquisition and maintenance of VWR involve unique neural substrates in the DS that vary by sex. Results reveal targets for sex-specific strategies to promote exercise.
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Affiliation(s)
- Margaret K Tanner
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Jazmyne K P Davis
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Jennifer Jaime
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Nicolette A Moya
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
- Department of Neuroscience, Northwestern Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Alyssa A Hohorst
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Kelsey Bonar
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Kelsey A Abrams
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
- University of Colorado Anschutz Medical Campus, Cell Biology, Stem Cells, and Development Graduate Program, Aurora, CO, USA
| | - Nashra Jamil
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Rebecca Han
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Troy J Hubert
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
- Department of Psychology, University of Kentucky, Lexington, KY, 40506, USA
| | - Nadja Brown
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Esteban C Loetz
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA
| | - Benjamin N Greenwood
- Department of Psychology, University of Colorado Denver, PO Box 173364, North Classroom Rm. 5005 F, CB 173, Denver, CO, 80217-3364, USA.
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Kanarik M, Grimm O, Mota NR, Reif A, Harro J. ADHD co-morbidities: A review of implication of gene × environment effects with dopamine-related genes. Neurosci Biobehav Rev 2022; 139:104757. [PMID: 35777579 DOI: 10.1016/j.neubiorev.2022.104757] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 06/25/2022] [Accepted: 06/26/2022] [Indexed: 02/07/2023]
Abstract
ADHD is a major burden in adulthood, where co-morbid conditions such as depression, substance use disorder and obesity often dominate the clinical picture. ADHD has substantial shared heritability with other mental disorders, contributing to comorbidity. However, environmental risk factors exist but their interaction with genetic makeup, especially in relation to comorbid disorders, remains elusive. This review for the first time summarizes present knowledge on gene x environment (GxE) interactions regarding the dopamine system. Hitherto, mainly candidate (GxE) studies were performed, focusing on the genes DRD4, DAT1 and MAOA. Some evidence suggest that the variable number tandem repeats in DRD4 and MAOA may mediate GxE interactions in ADHD generally, and comorbid conditions specifically. Nevertheless, even for these genes, common variants are bound to suggest risk only in the context of gender and specific environments. For other polymorphisms, evidence is contradictory and less convincing. Particularly lacking are longitudinal studies testing the interaction of well-defined environmental with polygenic risk scores reflecting the dopamine system in its entirety.
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Affiliation(s)
- Margus Kanarik
- Chair of Neuropsychopharmacology, Institute of Chemistry, University of Tartu, Ravila 14A Chemicum, 50411 Tartu, Estonia
| | - Oliver Grimm
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital, Goethe University, Frankfurt, Germany
| | - Nina Roth Mota
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Andreas Reif
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital, Goethe University, Frankfurt, Germany
| | - Jaanus Harro
- Chair of Neuropsychopharmacology, Institute of Chemistry, University of Tartu, Ravila 14A Chemicum, 50411 Tartu, Estonia; Psychiatry Clinic, North Estonia Medical Centre, Paldiski Road 52, 10614 Tallinn, Estonia.
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Ruiz-Tejada A, Neisewander J, Katsanos CS. Regulation of Voluntary Physical Activity Behavior: A Review of Evidence Involving Dopaminergic Pathways in the Brain. Brain Sci 2022; 12:brainsci12030333. [PMID: 35326289 PMCID: PMC8946175 DOI: 10.3390/brainsci12030333] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/23/2022] [Accepted: 02/26/2022] [Indexed: 02/04/2023] Open
Abstract
Physical activity leads to well-established health benefits. Current efforts to enhance physical activity have targeted mainly socioeconomic factors. However, despite these efforts, only a small number of adults engage in regular physical activity to the point of meeting current recommendations. Evidence collected in rodent models and humans establish a strong central nervous system component that regulates physical activity behavior. In particular, dopaminergic pathways in the central nervous system are among the best-characterized biological mechanisms to date with respect to regulating reward, motivation, and habit formation, which are critical for establishing regular physical activity. Herein, we discuss evidence for a role of brain dopamine in the regulation of voluntary physical activity behavior based on selective breeding and pharmacological studies in rodents, as well as genetic studies in both rodents and humans. While these studies establish a role of dopamine and associated mechanisms in the brain in the regulation of voluntary physical activity behavior, there is clearly need for more research on the underlying biology involved in motivation for physical activity and the formation of a physical activity habit. Such knowledge at the basic science level may ultimately be translated into better strategies to enhance physical activity levels within the society.
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Cadney MD, Hiramatsu L, Thompson Z, Zhao M, Kay JC, Singleton JM, Albuquerque RLD, Schmill MP, Saltzman W, Garland T. Effects of early-life exposure to Western diet and voluntary exercise on adult activity levels, exercise physiology, and associated traits in selectively bred High Runner mice. Physiol Behav 2021; 234:113389. [PMID: 33741375 PMCID: PMC8106885 DOI: 10.1016/j.physbeh.2021.113389] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/02/2021] [Accepted: 03/13/2021] [Indexed: 01/08/2023]
Abstract
Exercise behavior is under partial genetic control, but it is also affected by numerous environmental factors, potentially including early-life experiences whose effects persist into adulthood. We studied genetic and early-life environmental effects on wheel-running behavior in a mouse model that includes four replicate high runner (HR) lines selectively bred for increased voluntary wheel running as young adults and four non-selected control (C) lines. In a full factorial design, mice from each line were granted wheel access or not and administered either standard or Western diet (WD) from weaning (3 weeks old) to 6 weeks of age (sexual maturity). In addition to acute effects, after a washout period of 8 weeks (∼6 human years) in which all mice had standard diet and no wheel access, we found both beneficial and detrimental effects of these early-life exposures. During the first week of treatments, WD increased distance run by 29% in C mice and 48% in HR mice (significant Diet × Linetype interaction), but diet effects disappeared by the third week. Across the three weeks of juvenile treatment, WD significantly increased fat mass (with lean mass as a covariate). Tested as adults, early-life exercise increased wheel running of C mice but not HR mice in the first week. Early-life exercise also reduced adult anxiety-like behavior and increased adult fasted blood glucose levels, triceps surae mass, subdermal fat pad mass, and brain mass, but decreased heart ventricle mass. Using fat mass as a covariate, early-life exercise treatment increased adult leptin concentration. In contrast, early-life WD increased adult wheel running of HR mice but not C mice. Early-life WD also increased adult lean mass and adult preference for Western diet in all groups. Surprisingly, early-life treatment had no significant effect on adult body fat or maximal aerobic capacity (VO2max). No previous study has tested for combined or interactive effects of early-life WD and exercise. Our results demonstrate that both factors can have long-lasting effects on adult voluntary exercise and related phenotypes, and that these effects are modulated by genetic background. Overall, the long-lasting effects of early-life exercise were more pervasive than those of WD, suggesting critical opportunities for health intervention in childhood habits, as well as possible threats from modern challenges. These results may be relevant for understanding potential effects of activity reductions and dietary changes associated with the obesity epidemic and COVID-19 pandemic.
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Affiliation(s)
- Marcell D Cadney
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA
| | - Layla Hiramatsu
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA
| | - Zoe Thompson
- Neuroscience Graduate Program, University of California, Riverside, CA 92521, USA
| | - Meng Zhao
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA
| | - Jarren C Kay
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA
| | - Jennifer M Singleton
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA
| | | | - Margaret P Schmill
- Neuroscience Graduate Program, University of California, Riverside, CA 92521, USA
| | - Wendy Saltzman
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA
| | - Theodore Garland
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA.
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Kelty TJ, Brown JD, Kerr NR, Roberts MD, Childs TE, Cabrera OH, Manzella FM, Miller DK, Taylor GT, Booth FW. RNA-sequencing and behavioral testing reveals inherited physical inactivity co-selects for anxiogenic behavior without altering depressive-like behavior in Wistar rats. Neurosci Lett 2021; 753:135854. [PMID: 33785378 DOI: 10.1016/j.neulet.2021.135854] [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: 11/03/2020] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 11/15/2022]
Abstract
Physical inactivity is positively associated with anxiety and depression. Considering physical inactivity, anxiety, and depression each have a genetic basis for inheritance, our lab used artificial selectively bred low-voluntary running (LVR) and wild type (WT) female Wistar rats to test if physical inactivity genes selected over multiple generations would lead to an anxiety or depressive-like phenotype. We performed next generation RNA sequencing and immunoblotting on the dentate gyrus to reveal key biological functions from heritable physical inactivity. LVR rats did not display depressive-like behavior. However, LVR rats did display anxiogenic behavior with gene networks associated with reduced neuronal development, proliferation, and function compared to WT counterparts. Additionally, immunoblotting revealed LVR deficits in neuronal development and function. To our knowledge, this is the first study to show that by selectively breeding for physical inactivity genes, anxiety-like genes were co-selected. The study also reveals molecular insights to the genetic influences that physical inactivity has on anxiety-like behavior.
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Affiliation(s)
- Taylor J Kelty
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA.
| | - Jacob D Brown
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO 65211, USA
| | - Nathan R Kerr
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Michael D Roberts
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Tom E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Omar H Cabrera
- Department of Psychological Sciences, University of Missouri-St. Louis, St. Louis, MO 63110, USA
| | - Francesca M Manzella
- Department of Psychological Sciences, University of Missouri-St. Louis, St. Louis, MO 63110, USA
| | - Dennis K Miller
- Department of Psychological Sciences, University of Missouri, Columbia, MO 65211, USA
| | - George T Taylor
- Department of Psychological Sciences, University of Missouri-St. Louis, St. Louis, MO 63110, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65211, USA; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO 65211, USA; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO 65211, USA
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Stults-Kolehmainen MA, Blacutt M, Fogelman N, Gilson TA, Stanforth PR, Divin AL, Bartholomew JB, Filgueiras A, McKee PC, Ash GI, Ciccolo JT, Brotnow Decker L, Williamson SL, Sinha R. Measurement of Motivation States for Physical Activity and Sedentary Behavior: Development and Validation of the CRAVE Scale. Front Psychol 2021; 12:568286. [PMID: 33841225 PMCID: PMC8027339 DOI: 10.3389/fpsyg.2021.568286] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 02/22/2021] [Indexed: 01/04/2023] Open
Abstract
Physical activity, and likely the motivation for it, varies throughout the day. The aim of this investigation was to create a short assessment (CRAVE: Cravings for Rest and Volitional Energy Expenditure) to measure motivation states (wants, desires, urges) for physical activity and sedentary behaviors. Five studies were conducted to develop and evaluate the construct validity and reliability of the scale, with 1,035 participants completing the scale a total of 1,697 times. In Study 1, 402 university students completed a questionnaire inquiring about the want or desire to perform behaviors "at the present moment (right now)." Items related to physical activity (e.g., "move my body") and sedentary behaviors (e.g., "do nothing active"). An exploratory structural equation model (ESEM) revealed that 10 items should be retained, loading onto two factors (5 each for Move and Rest). In Study 2, an independent sample (n = 444) confirmed these results and found that Move and Rest desires were associated with stage-of-change for exercise behavior. In Study 3, 127 community-residing participants completed the CRAVE at 6-month intervals over two years- two times each session. Across-session interclass correlations (ICC) for Move (ICC = 0.72-0.95) and Rest (ICC = 0.69-0.88) were higher than when they were measured across 24-months (Move: ICC = 0.53; Rest: ICC = 0.49), indicating wants/desires have state-like qualities. In Study 4, a maximal treadmill test was completed by 21 university students. The CRAVE was completed immediately pre and post. Move desires decreased 26% and Rest increased 74%. Changes in Move and Rest desires were moderately associated with changes in perceived physical fatigue and energy. In Study 5, 41 university students sat quietly during a 50-min lecture. They completed the CRAVE at 3 time points. Move increased 19.6% and Rest decreased 16.7%. Small correlations were detected between move and both perceived energy and tiredness, but not calmness or tension. In conclusion, the CRAVE scale has good psychometric properties. These data also support tenets of the WANT model of motivation states for movement and rest (Stults-Kolehmainen et al., 2020a). Future studies need to explore how desires to move/rest relate to dynamic changes in physical activity and sedentarism.
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Affiliation(s)
- Matthew A. Stults-Kolehmainen
- Digestive Health Multispecialty Clinic, Yale – New Haven Hospital, New Haven, CT, United States
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States
| | - Miguel Blacutt
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States
| | - Nia Fogelman
- Yale Stress Center, Yale School of Medicine, New Haven, CT, United States
| | - Todd A. Gilson
- Department of Kinesiology and Physical Education, Northern Illinois University, DeKalb, IL, United States
| | - Philip R. Stanforth
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Amanda L. Divin
- Department of Health and Human Performance, Northwestern State University, Natchitoches, LA, United States
| | - John B. Bartholomew
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Alberto Filgueiras
- Department of Cognition and Human Development, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Paul C. McKee
- Department of Psychology, Southern Connecticut State University, New Haven, CT, United States
| | - Garrett I. Ash
- Pain, Research, Informatics, Medical Comorbidities and Education Center (PRIME), VA Connecticut Healthcare System, West Haven, CT, United States
- Center for Medical Informatics, Yale School of Medicine, New Haven, CT, United States
| | - Joseph T. Ciccolo
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States
| | - Line Brotnow Decker
- Yale Child Study Center, Yale School of Medicine, New Haven, CT, United States
- Division of Mental Health, Akershus University Hospital, Lørenskog, Norway
| | - Susannah L. Williamson
- Department of Health and Kinesiology, Texas A&M University, College Station, TX, United States
| | - Rajita Sinha
- Yale Stress Center, Yale School of Medicine, New Haven, CT, United States
- Yale Child Study Center, Yale School of Medicine, New Haven, CT, United States
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Kitazawa H, Hasegawa K, Aruga D, Tanaka M. Potential Genetic Contributions of the Central Nervous System to a Predisposition to Elite Athletic Traits: State-of-the-Art and Future Perspectives. Genes (Basel) 2021; 12:genes12030371. [PMID: 33807752 PMCID: PMC8000928 DOI: 10.3390/genes12030371] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/27/2021] [Accepted: 03/01/2021] [Indexed: 02/06/2023] Open
Abstract
Recent remarkable advances in genetic technologies have allowed for the identification of genetic factors potentially related to a predisposition to elite athletic performance. Most of these genetic variants seem to be implicated in musculoskeletal and cardiopulmonary functions. Conversely, it remains unclear whether functions of the central nervous system (CNS) genetically contribute to elite athletic traits, although the CNS plays critical roles in exercise performance. Accumulating evidence has highlighted the emerging implications of CNS-related genes in the modulation of brain activities, including mental performance and motor-related traits, thereby potentially contributing to high levels of exercise performance. In this review, recent advances are summarized, and future research directions are discussed in regard to CNS-related genes with potential roles in a predisposition to elite athletic traits.
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Affiliation(s)
- Hiroya Kitazawa
- Department of Physical Therapy, Health Science University, 7187 Kodachi, Fujikawaguchiko-machi, Minamitsuru-gun, Yamanashi 401-0380, Japan; (H.K.); (D.A.)
| | - Kazuya Hasegawa
- Faculty of Nutritional Sciences, Morioka University, 808 Sunakomi, Takizawa City, Iwate 020-0694, Japan;
| | - Daichi Aruga
- Department of Physical Therapy, Health Science University, 7187 Kodachi, Fujikawaguchiko-machi, Minamitsuru-gun, Yamanashi 401-0380, Japan; (H.K.); (D.A.)
| | - Masashi Tanaka
- Department of Physical Therapy, Health Science University, 7187 Kodachi, Fujikawaguchiko-machi, Minamitsuru-gun, Yamanashi 401-0380, Japan; (H.K.); (D.A.)
- Correspondence: ; Tel.: +81-555-83-5200
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11
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Bernardo B, Joaquim S, Garren J, Boucher M, Houle C, LaCarubba B, Qiao S, Wu Z, Esquejo RM, Peloquin M, Kim H, Breen DM. Characterization of cachexia in the human fibrosarcoma HT-1080 mouse tumour model. J Cachexia Sarcopenia Muscle 2020; 11:1813-1829. [PMID: 32924335 PMCID: PMC7749621 DOI: 10.1002/jcsm.12618] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/22/2020] [Accepted: 07/07/2020] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Cancer cachexia is a complex metabolic disease with unmet medical need. Although many rodent models are available, none are identical to the human disease. Therefore, the development of new preclinical models that simulate some of the physiological, biochemical, and clinical characteristics of the human disease is valuable. The HT-1080 human fibrosarcoma tumour cell line was reported to induce cachexia in mice. Therefore, the purpose of this work was to determine how well the HT-1080 tumour model could recapitulate human cachexia and to examine its technical performance. Furthermore, the efficacy of ghrelin receptor activation via anamorelin treatment was evaluated, because it is one of few clinically validated mechanisms. METHODS Female severe combined immunodeficient mice were implanted subcutaneously or heterotopically (renal capsule) with HT-1080 tumour cells. The cachectic phenotype was evaluated during tumour development, including body weight, body composition, food intake, muscle function (force and fatigue), grip strength, and physical activity measurements. Heterotopic and subcutaneous tumour histology was also compared. Energy balance was evaluated at standard and thermoneutral housing temperatures in the subcutaneous model. The effect of anamorelin (ghrelin analogue) treatment was also examined. RESULTS The HT-1080 tumour model had excellent technical performance and was reproducible across multiple experimental conditions. Heterotopic and subcutaneous tumour cell implantation resulted in similar cachexia phenotypes independent of housing temperature. Tumour weight and histology was comparable between both routes of administration with minimal inflammation. Subcutaneous HT-1080 tumour-bearing mice presented with weight loss (decreased fat mass and skeletal muscle mass/fibre cross-sectional area), reduced food intake, impaired muscle function (reduced force and grip strength), and decreased spontaneous activity and voluntary wheel running. Key circulating inflammatory biomarkers were produced by the tumour, including growth differentiation factor 15, Activin A, interleukin 6, and TNF alpha. Anamorelin prevented but did not reverse anorexia and weight loss in the subcutaneous model. CONCLUSIONS The subcutaneous HT-1080 tumour model displays many of the perturbations of energy balance and physical performance described in human cachexia, consistent with the production of key inflammatory factors. Anamorelin was most effective when administered early in disease progression. The HT-1080 tumour model is valuable for studying potential therapeutic targets for the treatment of cachexia.
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Affiliation(s)
- Barbara Bernardo
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
| | | | - Jeonifer Garren
- Biostatistics, Early Clinical Development, Pfizer Inc., Cambridge, MA, USA
| | - Magalie Boucher
- Drug Safety Research and Development, Pfizer Inc., Groton, CT, USA
| | | | | | - Shuxi Qiao
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
| | - Zhidan Wu
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
| | - Ryan M Esquejo
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
| | - Matthew Peloquin
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
| | - Hanna Kim
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
| | - Danna M Breen
- Internal Medicine Research Unit, Pfizer Inc., Cambridge, MA, USA
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12
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Stults-Kolehmainen MA, Blacutt M, Bartholomew JB, Gilson TA, Ash GI, McKee PC, Sinha R. Motivation States for Physical Activity and Sedentary Behavior: Desire, Urge, Wanting, and Craving. Front Psychol 2020; 11:568390. [PMID: 33240154 PMCID: PMC7677192 DOI: 10.3389/fpsyg.2020.568390] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/16/2020] [Indexed: 12/24/2022] Open
Abstract
To better explain daily fluctuations in physical activity and sedentary behavior, investigations of motivation are turning from social cognitive frameworks to those centered on affect, emotion and automaticity, such as the Affect and Health Behavior Framework (AHBF), Integrated Framework and Affective-Reflective Theory (ART). This shift has necessitated: (a) re-examination of older theories and their constructs, such as drives, needs and tensions and (b) an inspection of competing theories from other fields that also attempt to explain dynamic changes in health behaviors. The Dynamical Model of Desire, Elaborated Intrusion Theory and others commonly share with AHBF the idea that human behavior is driven strongly by desires and/or the similar concepts of wants, urges, and cravings. These affectively-charged motivation states (ACMS) change quickly and may better explain physical activity behavior from one moment to the next. Desires for movement predominantly derive from negative but also positive reinforcement. Data from clinical populations with movement dysfunction or psychiatric disorders provides further evidence of these drivers of movement. Those with Restless Legs Syndrome, akathisia, tic disorders and exercise dependence all report strong urges to move and relief when it is accomplished. Motor control research has identified centers of the brain responsible for wants and urges for muscular movement. Models elaborated herein differentiate between wants, desires, urges and cravings. The WANT model (Wants and Aversions for Neuromuscular Tasks) conceptualizes desires for movement and rest as varying by magnitude, approach or avoidance-orientation (wants versus aversions) and as occupying independent dimensions instead of opposite ends of the same axis. For instance, one hypothetically might be in a state of both high desire for movement and rest simultaneously. Variations in motivation states to move and rest may also be associated with various stress states, like freezing or fight and flight. The first validated instrument to measure feelings of desire/want for movement and rest, the CRAVE Scale (Cravings for Rest and Volitional Energy Expenditure) is already shedding light on the nature of these states. With these advances in theory, conceptual modeling and instrumentation, future investigations may explore the effects of desires and urges for movement and sedentary behavior in earnest.
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Affiliation(s)
- Matthew A. Stults-Kolehmainen
- Bariatric and Minimally Invasive Surgery Program, Yale-New Haven Hospital, New Haven, CT, United States
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States
| | - Miguel Blacutt
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States
| | - John B. Bartholomew
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, TX, United States
| | - Todd A. Gilson
- Department of Kinesiology and Physical Education, Northern Illinois University, DeKalb, IL, United States
| | - Garrett I. Ash
- Pain Research, Informatics, Multi-morbidities, and Education (PRIME), VA Connecticut Healthcare System, West Haven, CT, United States
- Center for Medical Informatics, Yale School of Medicine, New Haven, CT, United States
| | - Paul C. McKee
- Department of Psychology, Southern Connecticut State University, New Haven, CT, United States
| | - Rajita Sinha
- Yale Stress Center, Yale School of Medicine, New Haven, CT, United States
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13
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Grigsby KB, Childs TE, Booth FW. The role of nucleus accumbens CREB attenuation in rescuing low voluntary running behavior in female rats. J Neurosci Res 2020; 98:2302-2316. [PMID: 32725625 DOI: 10.1002/jnr.24698] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 06/30/2020] [Accepted: 07/03/2020] [Indexed: 01/30/2023]
Abstract
Given the integral role of nucleus accumbens (NAc) cAMP response element binding protein (CREB) activity in motivational processes, the goal of the current study was to determine whether blunting chronic NAc CREB activity could rescue the low physical activity motivation of female, low voluntary running (LVR) rats. NAc CREB phosphorylation is elevated in these rats, a state previously attributed to deficits in reward valuation. It was recently shown that overexpression of the upstream CREB inhibitor, protein kinase inhibitor alpha (PKIα), increased LVR nightly running by ~threefold. Therefore, the current study addresses the extent to which NAc CREB attenuation influences female LVR and wild-type (WT) wheel-running behavior. Inducible reductions in NAc neuronal activity using Gi-coupled hM4Di DREADDs increased running behavior in LVR, but not in WT, rats. Similarly, site-directed pharmacological inhibition of NAc CREB activity significantly increased LVR nightly running distance and time by ~twofold, with no effect in WT rats. Finally, environmentally enriched LVR rats exhibit higher levels of running compared to socially isolated rats in what appeared to be a CREB-related manner. Considering the positive outcomes of upstream CREB modulation and environmental enrichment on LVR behavior, we believe that blunting NAc CREB activity has the neuromolecular potential to partially reverse low physical activity motivation, as exemplified by the LVR model. The positive physical activity outcome of early life enrichment adds translatable value to human childhood enrichment and highlights its importance on motivational processes later in life.
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Affiliation(s)
- Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
- Department of Physiology, University of Missouri, Columbia, MO, USA
- Dalton Cardiovascular Center, University of Missouri, Columbia, MO, USA
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14
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Bidirectional Modulation of the Voltage-Gated Sodium (Nav1.6) Channel by Rationally Designed Peptidomimetics. Molecules 2020; 25:molecules25153365. [PMID: 32722255 PMCID: PMC7435778 DOI: 10.3390/molecules25153365] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/14/2020] [Accepted: 07/22/2020] [Indexed: 01/25/2023] Open
Abstract
Disruption of protein:protein interactions (PPIs) that regulate the function of voltage-gated Na+ (Nav) channels leads to neural circuitry aberrations that have been implicated in numerous channelopathies. One example of this pathophysiology is mediated by dysfunction of the PPI between Nav1.6 and its regulatory protein fibroblast growth factor 14 (FGF14). Thus, peptides derived from FGF14 might exert modulatory actions on the FGF14:Nav1.6 complex that are functionally relevant. The tetrapeptide Glu-Tyr-Tyr-Val (EYYV) mimics surface residues of FGF14 at the β8–β9 loop, a structural region previously implicated in its binding to Nav1.6. Here, peptidomimetics derived from EYYV (6) were designed, synthesized, and pharmacologically evaluated to develop probes with improved potency. Addition of hydrophobic protective groups to 6 and truncation to a tripeptide (12) produced a potent inhibitor of FGF14:Nav1.6 complex assembly. Conversely, addition of hydrophobic protective groups to 6 followed by addition of an N-terminal benzoyl substituent (19) produced a potentiator of FGF14:Nav1.6 complex assembly. Subsequent functional evaluation using whole-cell patch-clamp electrophysiology confirmed their inverse activities, with 12 and 19 reducing and increasing Nav1.6-mediated transient current densities, respectively. Overall, we have identified a negative and positive allosteric modulator of Nav1.6, both of which could serve as scaffolds for the development of target-selective neurotherapeutics.
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15
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Krentzel AA, Proaño S, Patisaul HB, Meitzen J. Temporal and bidirectional influences of estradiol on voluntary wheel running in adult female and male rats. Horm Behav 2020; 120:104694. [PMID: 31978389 PMCID: PMC7117976 DOI: 10.1016/j.yhbeh.2020.104694] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 01/17/2020] [Accepted: 01/19/2020] [Indexed: 12/12/2022]
Abstract
The sex steroid hormone 17β-estradiol (estradiol) regulates animal behavior as both a non-rapid hormone signal and as a rapid-acting neuromodulator. By practical necessity, estradiol's divergent temporal actions on rodent behavior are typically studied singularly and in one sex. We hypothesized that estradiol simultaneously acts through both temporal mechanisms to sex-specifically modulate a single behavior; and furthermore, that estradiol action in one temporal domain may regulate action in another. To test this hypothesis, we utilized one of the most robust rat behaviors exhibiting sex differences and estradiol-responsiveness, voluntary wheel running. Adult female and male rats were gonadectomized and exposed to daily repeated estradiol benzoate (EB) injections. Estradiol-sensitive running behavior was continually assessed in both the rapid and non-rapid temporal domains. We found that in female rats, estradiol rapidly decreased voluntary wheel running, but only after prior daily EB injections, supporting the hypothesis that non-rapid estradiol action influences rapid estradiol actions. Males exhibited a similar but less robust response, demonstrating sex-responsiveness. This rapid estradiol-induced decrease in running contrasted to non-rapid estradiol action which overall increased running in both sexes, revealing a bidirectional nature of estradiol's temporal influence. Non-rapid estradiol action also demonstrated sex-responsiveness, as a higher dose of EB was required to induce increased running in males compared to females. These findings indicate that estradiol rapidly, non-rapidly, and bidirectionally modulates wheel running in a sex-responsive manner, and that rapid estradiol action is modulated by non-rapid estradiol action. Overall, these data illustrate estradiol as a pleiotropic sex-responsive neuromodulator of a single behavior across temporal domains.
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Affiliation(s)
- Amanda A Krentzel
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America; W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States of America.
| | - Stephanie Proaño
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America; W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States of America
| | - Heather B Patisaul
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America; W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States of America; Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, United States of America
| | - John Meitzen
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States of America; W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States of America; Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, United States of America; Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
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16
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Swenson S, Blum K, McLaughlin T, Gold MS, Thanos PK. The therapeutic potential of exercise for neuropsychiatric diseases: A review. J Neurol Sci 2020; 412:116763. [PMID: 32305746 DOI: 10.1016/j.jns.2020.116763] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 02/14/2020] [Accepted: 02/28/2020] [Indexed: 02/06/2023]
Abstract
Exercise is known to have a myriad of health benefits. There is much to be learned from the effects of exercise and its potential for prevention, attenuation and treatment of multiple neuropsychiatric diseases and behavioral disorders. Furthermore, recent data and research on exercise benefits with respect to major health crises, such as, that of opioid and general substance use disorders, make it very important to better understand and review the mechanisms of exercise and how it could be utilized for effective treatments or adjunct treatments for these diseases. In addition, mechanisms, epigenetics and sex differences are examined and discussed in terms of future research implications.
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Affiliation(s)
- Sabrina Swenson
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biosciences, State University of New York at Buffalo, Buffalo, NY, USA
| | - Kenneth Blum
- Western Univesity Health Sciences, Graduate College, Pomona, CA, USA
| | | | - Mark S Gold
- Washington University in St. Louis, School of Medicine, St. Louis, MO, USA
| | - Panayotis K Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biosciences, State University of New York at Buffalo, Buffalo, NY, USA; Department of Psychology, State University of New York at Buffalo, Buffalo, NY, USA.
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17
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Grigsby KB, Kovarik CM, Mao X, Booth FW. Medial preoptic estrogen receptor-beta blunts the estrogen receptor-alpha mediated increases in wheel-running behavior of female rats. Behav Brain Res 2020; 379:112341. [PMID: 31711895 DOI: 10.1016/j.bbr.2019.112341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/22/2019] [Accepted: 10/31/2019] [Indexed: 11/17/2022]
Abstract
Estrogens are believed to enhance rodent voluntary wheel-running through medial preoptic (mPOA) estrogen receptor α (ERα) signaling, with little role attributed to estrogen receptor β (ERβ). Systemic ERβ activation has been shown to mitigate ERα driven increases in wheel-running. Therefore, the present goal was to determine whether ERβ signaling in the mPOA plays a similar modulatory role over ERα. We utilized outbred wild-type (WT) and rats selectively bred for low voluntary running (LVR) behavior to address whether mPOA ERβ signaling blunts ERα driven wheel-running behavior and immediate-early gene (Fos, Zif268, and Homer1) mRNA induction. Further, we addressed baseline mPOA mRNA expressions and circulating 17β-estradiol levels between female WT and LVR rats. Following ovariectomy, WT rats reduced running behavior ∼40 %, with no effect in LVR rats. Intra-medial preoptic injection of the ERα-agonist propylpyrazoletriol (PPT) increased wheel-running ∼3.5-fold in WT rats, while injections of the ERβ-agonist diarylpropionitrile (DPN) or a combination of the two agonists had no effect. Similarly, ERα-agonism (PPT) increased Fos and Homer1 induction ∼3-fold in WT and LVR isolated mPOA neurons, with no effect of the ERβ-agonist DPN alone or in combination with PPT, suggesting medial-preoptic ERβ activity may blunt ERα signaling. LVR rats exhibited higher mPOA mRNA expressions of Esr1, Esr2 and Cyp19a1, lower normalized uterine wet weights and lower 17β-estradiol plasma levels compared to WT, suggesting their low running may be due to low circulating estrogen levels. Collectively, these findings highlight mPOA ERβ as a potential neuro-molecular modulator of the estrogenic control of wheel-running behavior.
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Affiliation(s)
- Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States.
| | - Cathleen M Kovarik
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Xuansong Mao
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, United States; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, United States; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
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18
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Won J, Alfini AJ, Weiss LR, Nyhuis CC, Spira AP, Callow DD, Carson Smith J. Caudate Volume Mediates the Interaction between Total Sleep Time and Executive Function after Acute Exercise in Healthy Older Adults. Brain Plast 2019; 5:69-82. [PMID: 31970061 PMCID: PMC6971824 DOI: 10.3233/bpl-190087] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Although both exercise and sleep are significant lifestyle factors in cognitive aging, the interaction of these two factors with respect to cognition remains to be determined. Also, little is known regarding the role of the basal ganglia (BG) in cognitive aging despite its involvement in both sleep and executive function. The primary objective of this study was to investigate the interaction between sleep and acute exercise on executive function performance, and secondarily, to assess if BG volume mediates this interaction. Thirty healthy older adults (65.8±7.3 years) completed 30 minutes of seated rest or moderate-intensity cycling exercise on different days. Structural MRI was used to assess the volumes of BG components including caudate, putamen, and globus pallidus shortly after the experimental conditions. Approximately 90 minutes after each condition, the Stroop task was administered to measure executive function. To examine sleep, participants wore a wrist actigraph for 8.0±3.6 days prior to the first experimental session. Results revealed that while longer total sleep time (TST) was associated with shorter Stroop response time (RT), shorter TST was associated with longer RT after exercise, compared to rest, for both congruent (p = 0.029) and incongruent (p = 0.022) trials. Longer TST was correlated with greater caudate volume, and greater caudate volume was associated with exercise-related improvement in Stroop incongruent RT. Ultimately, we found that the association between longer sleep duration and faster processing speed after acute exercise was mediated by greater caudate volume. These findings suggest that TST is an important factor for acute exercise-induced cognitive improvements in older adults, and that our study is a first step in understanding the interactive effects of these important lifestyle factors in cognitive aging that might simultaneously be addressed to promote healthy cognitive aging. Future studies should examine the interactive effects of sleep and chronic exercise on cognitive function, and whether BG volume might also mediate this interaction.
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Affiliation(s)
- Junyeon Won
- Department of Kinesiology, University of Maryland, College Park, MD, USA
| | - Alfonso J Alfini
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Lauren R Weiss
- Department of Kinesiology, University of Maryland, College Park, MD, USA.,Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, USA
| | - Casandra C Nyhuis
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Adam P Spira
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.,Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA.,Center on Aging and Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Daniel D Callow
- Department of Kinesiology, University of Maryland, College Park, MD, USA.,Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, USA
| | - J Carson Smith
- Department of Kinesiology, University of Maryland, College Park, MD, USA.,Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, USA
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19
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Capri KM, Maroni MJ, Deane HV, Concepcion HA, DeCourcey H, Logan RW, Seggio JA. Male C57BL6/N and C57BL6/J Mice Respond Differently to Constant Light and Running-Wheel Access. Front Behav Neurosci 2019; 13:268. [PMID: 31920578 PMCID: PMC6914853 DOI: 10.3389/fnbeh.2019.00268] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 11/26/2019] [Indexed: 12/22/2022] Open
Abstract
Previous studies have shown that exposure to circadian disruption produces negative effects on overall health and behavior. More recent studies illustrate that strain differences in the behavioral and physiological responses to circadian disruption exist, even if the strains have similar genetic backgrounds. As such, we investigated the effects of constant room-level light (LL) with running-wheel access on the behavior and physiology of male C57BL6/J from Jackson Laboratories and C57BL6/N from Charles River Laboratories mice. Mice were exposed to either a 12:12 light-dark (LD) cycle or LL and given either a standard home cage or a cage with a running-wheel. Following 6 weeks of LD or LL, their response to behavioral assays (open-field, light-dark box, novel object) and measures of metabolism were observed. Under standard LD, C57BL6/J mice exhibited increased locomotor activity and reduced exploratory behavior compared to C57BL6/N mice. In LL, C57BL6/J mice had greater period lengthening and increased anxiety, while C57BL6/N mice exhibited increased weight gain and no change in exploratory behavior. C57BL6/J mice also decreased exploration with running-wheel access while C57BL6/N mice did not. These results further demonstrate that C57BL/6 substrains exhibit different behavioral and physiological responses to circadian disruption and wheel-running access.
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Affiliation(s)
- Kimberly M Capri
- Department of Biological Sciences, Bridgewater State University, Bridgewater, MA, United States.,Department of Mathematics and Statistics, Boston University, Boston, MA, United States
| | - Marissa J Maroni
- Department of Biological Sciences, Bridgewater State University, Bridgewater, MA, United States.,Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Hannah V Deane
- Department of Biological Sciences, Bridgewater State University, Bridgewater, MA, United States
| | - Holly A Concepcion
- Department of Biological Sciences, Bridgewater State University, Bridgewater, MA, United States
| | - Holly DeCourcey
- Department of Biological Sciences, Bridgewater State University, Bridgewater, MA, United States
| | - Ryan W Logan
- Translational Neuroscience Program, Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States.,Center for Systems Neurogenetics of Addiction, The Jackson Laboratory, Bar Harbor, ME, United States
| | - Joseph A Seggio
- Department of Biological Sciences, Bridgewater State University, Bridgewater, MA, United States
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20
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Won J, Alfini AJ, Weiss LR, Callow DD, Smith JC. Brain activation during executive control after acute exercise in older adults. Int J Psychophysiol 2019; 146:240-248. [DOI: 10.1016/j.ijpsycho.2019.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 09/26/2019] [Accepted: 10/08/2019] [Indexed: 11/26/2022]
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21
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Hicks SD, Jacob P, Perez O, Baffuto M, Gagnon Z, Middleton FA. The Transcriptional Signature of a Runner's High. Med Sci Sports Exerc 2019; 51:970-978. [PMID: 30557194 DOI: 10.1249/mss.0000000000001865] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Endorphins, endocannabinoids, monoamines, and neurotrophins have all been implicated in the euphoric response to endurance running, known as a runner's high (RH). The epitranscriptional mechanisms regulating this effect have not been defined. Here, we investigate peripheral micro-ribonucleic acid (miRNA) changes unique to athletes experiencing postrun euphoria, yielding insights into gene networks that control an RH. METHODS A cohort study involving 25 collegiate runners (48% females, age = 20 ± 1 yr) examined salivary RNA levels before and after a long-distance run. Participants were divided into RH and nonrunner's high (NRH) groups based on surveys of four criteria (mood, lost sense of time, run quality, and euphoria). Physiological measures were also recorded (temperature, heart rate, blood pressure, pupillary dilatation, and salivary serotonin). Levels of miRNAs and their messenger RNA targets were compared across pre- and postrun samples from RH and NRH groups with two-way ANOVA. Representation of opioid, gamma-aminobutyic acid (GABA), endocannabinoid, neurotrophin, serotonergic, and dopaminergic pathways was assessed in DIANA miRPath. Pearson's correlation analyses examined relationships between miRNAs and RH indices. RESULTS RH participants (n = 13) demonstrated postrun mydriasis (P = 0.046) and hypothermia (P = 0.043) relative to NRH participants (n = 12) but had no difference in serotonin dynamics (P = 0.88). Six miRNAs (miR-194-5p, miR-4676-3p, miR-4254, miR-4425, miR-1273-3p, miR-6743-5p) exhibited significant effects (false discovery rate P value < 0.05) across pre- or postrun and RH/NRH groups. These miRNAs displayed target enrichment for opioid (P = 2.74E-06) and GABA (P = 0.00016) pathways. miR-1237-3p levels were related with lost sense of time (R = 0.40). Mitogen-activated protein kinase (MAPK11), an endocannabinoid target of miR-1273-3p, was nominally elevated in RH participants (false discovery rate P value = 0.11). CONCLUSIONS Unique dynamics in miRNA concentration occur in athletes with subjective/objective evidence of RH, targeting genes implicated endorphin, endocannabinoid, and GABAergic signaling.
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Affiliation(s)
- Steven D Hicks
- Department of Pediatrics, Penn State College of Medicine, Hershey, PA
| | - Paige Jacob
- Department of Biology, Marist College, Poughkeepsie, NY
| | - Omar Perez
- Department of Biology, Marist College, Poughkeepsie, NY
| | | | - Zofia Gagnon
- Department of Biology, Marist College, Poughkeepsie, NY
| | - Frank A Middleton
- Departments of Neuroscience and Physiology, Biochemistry and Molecular Biology, Pediatrics, and Psychiatry and Behavioral Sciences, SUNY Upstate Medical University, Syracuse, NY
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22
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Greenwood BN. The role of dopamine in overcoming aversion with exercise. Brain Res 2019; 1713:102-108. [DOI: 10.1016/j.brainres.2018.08.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 12/18/2022]
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23
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Grigsby KB, Kelty TJ, Booth FW. Medial habenula maturational deficits associate with low motivation for voluntary physical activity. Brain Res 2018; 1698:187-194. [PMID: 30118717 DOI: 10.1016/j.brainres.2018.08.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 08/11/2018] [Accepted: 08/13/2018] [Indexed: 11/25/2022]
Abstract
The habenula is a small, diencephalic structure comprised of distinct subnuclei which receives inputs from the limbic forebrain and sends projections to various regions in the midbrain, making this region well positioned to influence reward and motivation. Genetic ablation of the dorsal medial habenula is known to decrease voluntary wheel-running in mice. However, the extent to which the medial habenula (MHb) mediates wheel-running motivation in the context of high or low motivation for voluntary physical activity remains to be determined. In so, we utilized 5-week-old female rats selectively bred to voluntarily run high (HVR) or low (LVR) distances in order to determine if inherent differences in medial habenula maturation accompany inherent differences in wheel-running motivation. We report a significantly higher expression of genes associated with MHb development (Brn3a, Nurr1, Tac1, and Kcnip) in HVR versus LVR rats. Furthermore, there was a positive correlation between Brn3a and Nurr1 expression and run distance in HVR, but not LVR rats. Similarly, NeuN and Synapsin 1, markers of neuronal maturation, were higher in HVR compared to LVR rats. Lastly, dendritic density was determined to be higher in the MHb of HVR versus LVR rats, while LVR rats showed a higher percentage of thin spines, suggesting a higher prevalence of immature dendrites in LVR rats. Taken together, the above findings highlight the involvement of MHb in driving the motivation to be physically active. Given pandemic levels of global physical inactivity, the role of the MHb offers a novel potential to improve our global health.
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Affiliation(s)
- Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States.
| | - Taylor J Kelty
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, United States; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, United States; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
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24
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Reddon H, Patel Y, Turcotte M, Pigeyre M, Meyre D. Revisiting the evolutionary origins of obesity: lazy versus peppy-thrifty genotype hypothesis. Obes Rev 2018; 19:1525-1543. [PMID: 30261552 DOI: 10.1111/obr.12742] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/26/2018] [Accepted: 07/01/2018] [Indexed: 12/31/2022]
Abstract
The recent global obesity epidemic is attributed to major societal and environmental changes, such as excessive energy intake and sedentary lifestyle. However, exposure to 'obesogenic' environments does not necessarily result in obesity at the individual level, as 40-75% of body mass index variation in population is attributed to genetic differences. The thrifty genotype theory posits that genetic variants promoting efficient food sequestering and optimal deposition of fat during periods of food abundance were evolutionarily advantageous for the early hunter-gatherer and were positively selected. However, the thrifty genotype is likely too simplistic and fails to provide a justification for the complex distribution of obesity predisposing gene variants and for the broad range of body mass index observed in diverse ethnic groups. This review proposes that gene pleiotropy may better account for the variability in the distribution of obesity susceptibility alleles across modern populations. We outline the lazy-thrifty versus peppy-thrifty genotype hypothesis and detail the body of evidence in the literature in support of this novel concept. Future population genetics and mathematical modelling studies that account for pleiotropy may further improve our understanding of the evolutionary origins of the current obesity epidemic.
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Affiliation(s)
- H Reddon
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada
| | - Y Patel
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada
| | - M Turcotte
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada
| | - M Pigeyre
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada
| | - D Meyre
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada
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25
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Timirci-Kahraman O, Yilmaz U, Yilmaz N, Cevik A, Horozoglu C, Celik F, Gokce MO, Ergen A, Melekoglu A, Zeybek U. A Study of Short- and Long-term mRNA Levels of the Retn, Iapp, and Drd5 Genes in Obese Mice Induced with High-fat Diet. In Vivo 2018; 32:813-817. [PMID: 29936463 DOI: 10.21873/invivo.11312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/26/2018] [Accepted: 03/28/2018] [Indexed: 12/18/2022]
Abstract
BACKGROUND/AIM Adipocyte gene expression is altered in obese individuals through multiple metabolic and biochemical pathways. In this study, we aimed to examine the expression of resistin (Retn), amylin (Iapp), and dopamine receptor domain 5 (Drd5) genes previously suggested to contribute to the pathogenesis of obesity, albeit controversially. We also aimed to determine the effects on short and long-term mRNA levels of these genes in obese mice, induced with high-fat diet (HFD). MATERIALS AND METHODS Two obesity models were created in our study: group T1 (20 mice) was fed with HFD (60% fat) for 3 months, and group T2 (20 mice) was fed with HFD (60% fat) for 6 months. The control group T0 (20 mice) was fed with a diet of 10% kcal fat supplement for 6 months. At the end of the experiment, their adipose tissues were dissected surgically. Tissue samples of each group were pooled for RNA isolation, cDNA synthesis was carried out and the mRNA levels were examined by quantitative real-time polymerase chain reaction. Serum resistin levels were measured using multiplex bead (luminex) technology for validation. RESULTS In T2 mice, the mRNA expression of Retn showed a moderate up-regulation (fold change=8.32; p=0.0019) in the adipose tissues. Iapp expression was also significantly up-regulated (fold change=9.78; p=0.012). Moreover, a 6.36-fold up-regulation for Drd5 was observed in the adipose tissues of T2 mice (p<0.001). At the same time, serum levels of resistin were found to be high in T1 and T2 mice compared to the control group (p<0.001 and p=0.024, respectively). CONCLUSION Our study demonstrated that the mRNA levels of the genetic markers considered to play a role in adipogenesis were different in short- and long-term obesity models formed in C57BL/6J mice using HFD.
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Affiliation(s)
- Ozlem Timirci-Kahraman
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Umit Yilmaz
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Nesibe Yilmaz
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Aydin Cevik
- Department of Experimental Animal Biology and Biomedical Application Techniques, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Cem Horozoglu
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.,Department of Medical Services and Techniques, Istanbul Gelisim University, Istanbul, Turkey
| | - Faruk Celik
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Muhammed Oguz Gokce
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Arzu Ergen
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Abdullah Melekoglu
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Kastamonu University, Kastamonu, Turkey
| | - Umit Zeybek
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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26
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Grigsby KB, Ruegsegger GN, Childs TE, Booth FW. Overexpression of Protein Kinase Inhibitor Alpha Reverses Rat Low Voluntary Running Behavior. Mol Neurobiol 2018; 56:1782-1797. [PMID: 29931508 DOI: 10.1007/s12035-018-1171-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/31/2018] [Indexed: 12/13/2022]
Abstract
A gene was sought that could reverse low voluntary running distances in a model of low voluntary wheel-running behavior. In order to confirm the low motivation to wheel-run in our model does not result from defects in reward valuation, we employed sucrose preference and conditioned place preference for voluntary wheel-access. We observed no differences between our model and wild-type rats regarding the aforementioned behavioral testing. Instead, low voluntary runners seemed to require less running to obtain similar rewards for low voluntary running levels compared to wild-type rats. Previous work in our lab identified protein kinase inhibitor alpha as being lower in low voluntary running than wild-type rats. Next, nucleus accumbens injections of an adenoviral-associated virus that overexpressed the protein kinase inhibitor alpha gene increased running distance in low voluntary running, but not wild-type rats. Endogenous mRNA levels for protein kinase inhibitor alpha, dopamine receptor D1, dopamine receptor D2, and Fos were all only lower in wild-type rats following overexpression compared to low voluntary runners, suggesting a potential molecular and behavioral resistance in wild-type rats. Utilizing a nucleus accumbens preparation, three intermediate early gene mRNAs increased in low voluntary running slices after dopamine receptor agonist SKF-38393 exposure, while wild-type had no response. In summary, the results suggest that protein kinase inhibitor alpha is a promising gene candidate to partially rescue physical activity in the polygenic model of low voluntary running. Importantly, there were divergent molecular responses to protein kinase inhibitor alpha overexpression in low voluntary runners compared to wild-type rats.
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Affiliation(s)
- Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Gregory N Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA.,Division of Endocrinology, Diabetes and Nutrition, Mayo Clinic, Rochester, MN, 55905, USA
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, 65211, USA. .,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, 65211, USA. .,Department of Physiology, University of Missouri, Columbia, MO, 65211, USA. .,Dalton Cardiovascular Center, University of Missouri, Columbia, MO, 65211, USA.
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27
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Mul JD. Voluntary exercise and depression-like behavior in rodents: are we running in the right direction? J Mol Endocrinol 2018; 60:R77-R95. [PMID: 29330149 DOI: 10.1530/jme-17-0165] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 01/11/2018] [Indexed: 12/18/2022]
Abstract
Acute or chronic exposure to stress can increase the risk to develop major depressive disorder, a severe, recurrent and common psychiatric condition. Depression places an enormous social and financial burden on modern society. Although many depressed patients are treated with antidepressants, their efficacy is only modest, underscoring the necessity to develop clinically effective pharmaceutical or behavioral treatments. Exercise training produces beneficial effects on stress-related mental disorders, indicative of clinical potential. The pro-resilient and antidepressant effects of exercise training have been documented for several decades. Nonetheless, the underlying molecular mechanisms and the brain circuitries involved remain poorly understood. Preclinical investigations using voluntary wheel running, a frequently used rodent model that mimics aspects of human exercise training, have started to shed light on the molecular adaptations, signaling pathways and brain nuclei underlying the beneficial effects of exercise training on stress-related behavior. In this review, I highlight several neurotransmitter systems that are putative mediators of the beneficial effects of exercise training on mental health, and review recent rodent studies that utilized voluntary wheel running to promote our understanding of exercise training-induced central adaptations. Advancements in our mechanistic understanding of how exercise training induces beneficial neuronal adaptations will provide a framework for the development of new strategies to treat stress-associated mental illnesses.
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Affiliation(s)
- Joram D Mul
- Department of Endocrinology and MetabolismAcademic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Laboratory of EndocrinologyDepartment of Clinical Chemistry, University of Amsterdam, Amsterdam, the Netherlands
- Netherlands Institute for NeuroscienceRoyal Netherlands Academy of Arts and Sciences (KNAW), Amsterdam, the Netherlands
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28
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Grigsby KB, Kovarik CM, Rottinghaus GE, Booth FW. High and low nightly running behavior associates with nucleus accumbens N-Methyl-d-aspartate receptor (NMDAR) NR1 subunit expression and NMDAR functional differences. Neurosci Lett 2018; 671:50-55. [PMID: 29425730 DOI: 10.1016/j.neulet.2018.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/03/2018] [Accepted: 02/05/2018] [Indexed: 11/19/2022]
Abstract
The extent to which N-Methyl-d-aspartate (NMDA) receptors facilitate the motivation to voluntarily wheel-run in rodents has yet to be determined. In so, we utilized female Wistar rats selectively bred to voluntarily run high (HVR) and low (LVR) nightly distances in order to examine if endogenous differences in nucleus accumbens (NAc) NMDA receptor expression and function underlies the propensity for high or low motivation to voluntarily wheel-run. 12-14 week old HVR and LVR females were used to examine: 1.) NAc mRNA and protein expression of NMDA subunits NR1, NR2A and NR2B; 2.) NMDA current responses in isolated medium spiny neurons (MSNs) and 3.) NMDA-evoked dopamine release in an ex vivo preparation of NAc punches. Expectedly, there was a large divergence in nightly running distance and time between HVR and LVR rats. We saw a significantly higher mRNA and protein expression of NR1 in HVR compared to LVR rats, while seeing no difference in the expression of NR2A or NR2B. There was a greater current response to a 500 ms application of 300 μM of NMDA in medium-spiny neurons isolated from the NAc HVR compared to LVR animals. On average, NMDA-evoked punches (50 μM of NMDA for 10 min) taken from HVR rats retained ∼54% of the dopamine content compared to their bilateral non-evoked sides, while evoked punches from LVR animals showed no statistical decrease in dopamine content compared to their non-evoked sides. Collectively, these data suggest a potential link between NAc NR1 subunit expression as well as NMDA function and the predisposition for nightly voluntary running behavior in rats. In light of the epidemic rise in physical inactivity, these findings have the potential to explain a neuro-molecular mechanism that regulates the motivation to be physically active.
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Affiliation(s)
- Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States.
| | - Cathleen M Kovarik
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - George E Rottinghaus
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, United States; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, United States; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
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29
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Rosenfeld CS. Sex-dependent differences in voluntary physical activity. J Neurosci Res 2017; 95:279-290. [PMID: 27870424 DOI: 10.1002/jnr.23896] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Revised: 07/25/2016] [Accepted: 08/01/2016] [Indexed: 12/12/2022]
Abstract
Numbers of overweight and obese individuals are increasing in the United States and globally, and, correspondingly, the associated health care costs are rising dramatically. More than one-third of children are currently considered obese with a predisposition to type 2 diabetes, and it is likely that their metabolic conditions will worsen with age. Physical inactivity has also risen to be the leading cause of many chronic, noncommunicable diseases (NCD). Children are more physically inactive now than they were in past decades, which may be due to intrinsic and extrinsic factors. In rodents, the amount of time engaged in spontaneous activity within the home cage is a strong predictor of later adiposity and weight gain. Thus, it is important to understand primary motivators stimulating physical activity (PA). There are normal sex differences in PA levels in rodents and humans. The perinatal environment can induce sex-dependent differences in PA disturbances. This Review considers the current evidence for sex differences in PA in rodents and humans. The rodent studies showing that early exposure to environmental chemicals can shape later adult PA responses are discussed. Next, whether there are different motivators stimulating exercise in male vs. female humans are examined. Finally, the brain regions, genes, and pathways that modulate PA in rodents, and possibly by translation in humans, are described. A better understanding of why each sex remains physically active through the life span could open new avenues for preventing and treating obesity in children and adults. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Cheryl S Rosenfeld
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri.,Bond Life Sciences Center University of Missouri, Columbia, Missouri.,Thompson Center for Autism and Neurobehavioral Disorders, University of Missouri, Columbia, Missouri.,Genetics Area Program, University of Missouri, Columbia, Missouri
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30
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Roberts MD, Ruegsegger GN, Brown JD, Booth FW. Mechanisms Associated With Physical Activity Behavior: Insights From Rodent Experiments. Exerc Sport Sci Rev 2017; 45:217-222. [DOI: 10.1249/jes.0000000000000124] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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31
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Booth FW, Roberts CK, Thyfault JP, Ruegsegger GN, Toedebusch RG. Role of Inactivity in Chronic Diseases: Evolutionary Insight and Pathophysiological Mechanisms. Physiol Rev 2017; 97:1351-1402. [PMID: 28814614 PMCID: PMC6347102 DOI: 10.1152/physrev.00019.2016] [Citation(s) in RCA: 364] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 03/06/2017] [Accepted: 03/09/2017] [Indexed: 12/13/2022] Open
Abstract
This review proposes that physical inactivity could be considered a behavior selected by evolution for resting, and also selected to be reinforcing in life-threatening situations in which exercise would be dangerous. Underlying the notion are human twin studies and animal selective breeding studies, both of which provide indirect evidence for the existence of genes for physical inactivity. Approximately 86% of the 325 million in the United States (U.S.) population achieve less than the U.S. Government and World Health Organization guidelines for daily physical activity for health. Although underappreciated, physical inactivity is an actual contributing cause to at least 35 unhealthy conditions, including the majority of the 10 leading causes of death in the U.S. First, we introduce nine physical inactivity-related themes. Next, characteristics and models of physical inactivity are presented. Following next are individual examples of phenotypes, organ systems, and diseases that are impacted by physical inactivity, including behavior, central nervous system, cardiorespiratory fitness, metabolism, adipose tissue, skeletal muscle, bone, immunity, digestion, and cancer. Importantly, physical inactivity, itself, often plays an independent role as a direct cause of speeding the losses of cardiovascular and strength fitness, shortening of healthspan, and lowering of the age for the onset of the first chronic disease, which in turn decreases quality of life, increases health care costs, and accelerates mortality risk.
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Affiliation(s)
- Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri; Geriatrics, Research, Education and Clinical Center (GRECC), VA Greater Los Angeles Healthcare System, Los Angeles, California; Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas; and Cardiovascular Division, Department of Medicine, University of Missouri, Columbia, Missouri
| | - Christian K Roberts
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri; Geriatrics, Research, Education and Clinical Center (GRECC), VA Greater Los Angeles Healthcare System, Los Angeles, California; Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas; and Cardiovascular Division, Department of Medicine, University of Missouri, Columbia, Missouri
| | - John P Thyfault
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri; Geriatrics, Research, Education and Clinical Center (GRECC), VA Greater Los Angeles Healthcare System, Los Angeles, California; Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas; and Cardiovascular Division, Department of Medicine, University of Missouri, Columbia, Missouri
| | - Gregory N Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri; Geriatrics, Research, Education and Clinical Center (GRECC), VA Greater Los Angeles Healthcare System, Los Angeles, California; Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas; and Cardiovascular Division, Department of Medicine, University of Missouri, Columbia, Missouri
| | - Ryan G Toedebusch
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri; Geriatrics, Research, Education and Clinical Center (GRECC), VA Greater Los Angeles Healthcare System, Los Angeles, California; Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas; and Cardiovascular Division, Department of Medicine, University of Missouri, Columbia, Missouri
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32
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Ruegsegger GN, Grigsby KB, Kelty TJ, Zidon TM, Childs TE, Vieira-Potter VJ, Klinkebiel DL, Matheny M, Scarpace PJ, Booth FW. Maternal Western diet age-specifically alters female offspring voluntary physical activity and dopamine- and leptin-related gene expression. FASEB J 2017; 31:5371-5383. [PMID: 28794174 DOI: 10.1096/fj.201700389r] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 07/25/2017] [Indexed: 01/30/2023]
Abstract
Prenatal overnutrition affects development into adulthood and influences risk of obesity. We assessed the transgenerational effect of maternal Western diet (WD) consumption on offspring physical activity. Voluntary wheel running was increased in juvenile (4-7 wk of age), but decreased in adult (16-19 wk of age), F1 female WD offspring In contrast, no wheel-running differences in F1 male offspring were observed. Increased wheel running in juvenile female WD offspring was associated with up-regulated dopamine receptor (DRD)-1 and -2 in the nucleus accumbens (NAc) and with down-regulated Lepr in the ventral tegmental area (VTA). Conversely, decreased wheel running by adult female WD offspring was associated with down-regulated DRD1 in the NAc and with up-regulated Lepr in the VTA. Body fat, leptin, and insulin were increased in male, but not in female, F1 WD offspring. Recombinant virus (rAAV) leptin antagonism in the VTA decreased wheel running in standard diet but not in WD F1 female offspring. Analysis of F2 offspring found no differences in wheel running or adiposity in male or female offspring, suggesting that changes in the F1 generation were related to in utero somatic reprogramming. Our findings indicate prenatal WD exposure leads to age-specific changes in voluntary physical activity in female offspring that are differentially influenced by VTA leptin antagonism.-Ruegsegger, G. N., Grigsby, K. B., Kelty, T. J., Zidon, T. M., Childs, T. E., Vieira-Potter, V. J., Klinkebiel, D. L., Matheny, M., Scarpace, P. J., Booth, F. W. Maternal Western diet age-specifically alters female offspring voluntary physical activity and dopamine- and leptin-related gene expression.
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Affiliation(s)
- Gregory N Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri, USA
| | - Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri, USA
| | - Taylor J Kelty
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri, USA
| | - Terese M Zidon
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, USA
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri, USA
| | - Victoria J Vieira-Potter
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, USA
| | - David L Klinkebiel
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Michael Matheny
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, Florida, USA
| | - Phillip J Scarpace
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, Florida, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri, USA; .,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, USA.,Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri, USA.,Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri, USA
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Ruegsegger GN, Booth FW. Running from Disease: Molecular Mechanisms Associating Dopamine and Leptin Signaling in the Brain with Physical Inactivity, Obesity, and Type 2 Diabetes. Front Endocrinol (Lausanne) 2017; 8:109. [PMID: 28588553 PMCID: PMC5440472 DOI: 10.3389/fendo.2017.00109] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/05/2017] [Indexed: 01/04/2023] Open
Abstract
Physical inactivity is a primary contributor to diseases such as obesity, cardiovascular disease, and type 2 diabetes. Accelerometry data suggest that a majority of US adults fail to perform substantial levels of physical activity needed to improve health. Thus, understanding the molecular factors that stimulate physical activity, and physical inactivity, is imperative for the development of strategies to reduce sedentary behavior and in turn prevent chronic disease. Despite many of the well-known health benefits of physical activity being described, little is known about genetic and biological factors that may influence this complex behavior. The mesolimbic dopamine system regulates motivating and rewarding behavior as well as motor movement. Here, we present data supporting the hypothesis that obesity may mechanistically lower voluntary physical activity levels via dopamine dysregulation. In doing so, we review data that suggest mesolimbic dopamine activity is a strong contributor to voluntary physical activity behavior. We also summarize findings suggesting that obesity leads to central dopaminergic dysfunction, which in turn contributes to reductions in physical activity that often accompany obesity. Additionally, we highlight examples in which central leptin activity influences physical activity levels in a dopamine-dependent manner. Future elucidation of these mechanisms will help support strategies to increase physical activity levels in obese patients and prevent diseases caused by physical inactivity.
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Affiliation(s)
- Gregory N. Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Frank W. Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, United States
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, United States
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
- *Correspondence: Frank W. Booth,
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Mu-opioid receptor inhibition decreases voluntary wheel running in a dopamine-dependent manner in rats bred for high voluntary running. Neuroscience 2016; 339:525-537. [DOI: 10.1016/j.neuroscience.2016.10.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 09/15/2016] [Accepted: 10/03/2016] [Indexed: 01/06/2023]
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Garland T, Cadney MD, Waterland RA. Early-Life Effects on Adult Physical Activity: Concepts, Relevance, and Experimental Approaches. Physiol Biochem Zool 2016; 90:1-14. [PMID: 28051947 PMCID: PMC6397655 DOI: 10.1086/689775] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Locomotion is a defining characteristic of animal life and plays a crucial role in most behaviors. Locomotion involves physical activity, which can have far-reaching effects on physiology and neurobiology, both acutely and chronically. In human populations and in laboratory rodents, higher levels of physical activity are generally associated with positive health outcomes, although excessive exercise can have adverse consequences. Whether and how such relationships occur in wild animals is unknown. Behavioral variation among individuals arises from genetic and environmental factors and their interactions as well as from developmental programming (persistent effects of early-life environment). Although tremendous progress has been made in identifying genetic and environmental influences on individual differences in behavior, early-life effects are not well understood. Early-life effects can in some cases persist across multiple generations following a single exposure and, in principle, may constrain or facilitate the rate of evolution at multiple levels of biological organization. Understanding the mechanisms of such transgenerational effects (e.g., exposure to stress hormones in utero, inherited epigenetic alterations) may prove crucial to explaining unexpected and/or sex-specific responses to selection as well as limits to adaptation. One area receiving increased attention is early-life effects on adult physical activity. Correlational data from epidemiological studies suggest that early-life nutritional stress can (adversely) affect adult human activity levels and associated physiological traits (e.g., body composition, metabolic health). The few existing studies of laboratory rodents demonstrate that both maternal and early-life exercise can affect adult levels of physical activity and related phenotypes. Going forward, rodents offer many opportunities for experimental studies of (multigenerational) early-life effects, including studies that use maternal exposures and cross-fostering designs.
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Affiliation(s)
- Theodore Garland
- Department of Biology, University of California, Riverside, California 92521
| | - Marcell D. Cadney
- Department of Biology, University of California, Riverside, California 92521
| | - Robert A. Waterland
- Departments of Pediatrics and Molecular & Human Genetics, Baylor College of Medicine, USDA/ARS Children’s Nutrition Research Center, Houston, Texas 77030
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Ruegsegger GN, Toedebusch RG, Childs TE, Grigsby KB, Booth FW. Loss of Cdk5 function in the nucleus accumbens decreases wheel running and may mediate age-related declines in voluntary physical activity. J Physiol 2016; 595:363-384. [PMID: 27461471 DOI: 10.1113/jp272489] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 07/20/2016] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Physical inactivity, which drastically increases with advancing age, is associated with numerous chronic diseases. The nucleus accumbens (the pleasure and reward 'hub' in the brain) influences wheel running behaviour in rodents. RNA-sequencing and subsequent bioinformatics analysis led us to hypothesize a potential relationship between the regulation of dendritic spine density, the molecules involved in synaptic transmission, and age-related reductions in wheel running. Upon completion of follow-up studies, we developed the working model that synaptic plasticity in the nucleus accumbens is central to age-related changes in voluntary running. Testing this hypothesis, inhibition of Cdk5 (comprising a molecule central to the processes described above) in the nucleus accumbens reduced wheel running. The results of the present study show that reductions in synaptic transmission and Cdk5 function are related to decreases in voluntary running behaviour and provide guidance for understanding the neural mechanisms that underlie age-dependent reductions in the motivation to be physically active. ABSTRACT Increases in age are often associated with reduced levels of physical activity, which, in turn, associates with the development of numerous chronic diseases. We aimed to assess molecular differences in the nucleus accumbens (NAc) (a specific brain nucleus postulated to influence rewarding behaviour) with respect to wheel running and sedentary female Wistar rats at 8 and 14 weeks of age. RNA-sequencing was used to interrogate transcriptomic changes between 8- and 14-week-old wheel running rats, and select transcripts were later analysed by quantitative RT-PCR in age-matched sedentary rats. Voluntary wheel running was greatest at 8 weeks and had significantly decreased by 12 weeks. From 619 differentially expressed mRNAs, bioinformatics suggested that cAMP-mediated signalling, dopamine- and cAMP-regulated neuronal phosphoprotein of 32 kDa feedback, and synaptic plasticity were greater in 8- vs. 14-week-old rats. In depth analysis of these networks showed significant (∼20-30%; P < 0.05) decreases in cell adhesion molecule (Cadm)4 and p39 mRNAs, as well as their proteins from 8 to 14 weeks of age in running and sedentary rats. Furthermore, Cadm4, cyclin-dependent kinase 5 (Cdk5) and p39 mRNAs were significantly correlated with voluntary running distance. Analysis of dendritic spine density in the NAc showed that wheel access increased spine density (P < 0.001), whereas spine density was lower in 14- vs. 8-week-old sedentary rats (P = 0.03). Intriguingly, intra-NAc injection of the Cdk5 inhibitor roscovitine, dose-dependently decreased wheel running. Collectively, these experiments suggest that an age-dependent loss in synaptic function and Cdk5/p39 activity in the NAc may be partially responsible for age-related declines in voluntary running behaviour.
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Affiliation(s)
| | - Ryan G Toedebusch
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA
| | - Kolter B Grigsby
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, USA.,Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, USA.,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA.,Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, USA
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Park YM, Kanaley JA, Padilla J, Zidon T, Welly RJ, Will MJ, Britton SL, Koch LG, Ruegsegger GN, Booth FW, Thyfault JP, Vieira-Potter VJ. Effects of intrinsic aerobic capacity and ovariectomy on voluntary wheel running and nucleus accumbens dopamine receptor gene expression. Physiol Behav 2016; 164:383-9. [PMID: 27297873 DOI: 10.1016/j.physbeh.2016.06.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 05/18/2016] [Accepted: 06/07/2016] [Indexed: 12/29/2022]
Abstract
UNLABELLED Rats selectively bred for high (HCR) and low (LCR) aerobic capacity show a stark divergence in wheel running behavior, which may be associated with the dopamine (DA) system in the brain. HCR possess greater motivation for voluntary running along with greater brain DA activity compared to LCR. We recently demonstrated that HCR are not immune to ovariectomy (OVX)-associated reductions in spontaneous cage (i.e. locomotor) activity. Whether HCR and LCR rats differ in their OVX-mediated voluntary wheel running response is unknown. PURPOSE To determine whether HCR are protected from OVX-associated reduction in voluntary wheel running. METHODS Forty female HCR and LCR rats (age ~27weeks) had either SHM or OVX operations, and given access to a running wheel for 11weeks. Weekly wheel running distance was monitored throughout the intervention. Nucleus accumbens (NAc) was assessed for mRNA expression of DA receptors at sacrifice. RESULTS Compared to LCR, HCR ran greater distance and had greater ratio of excitatory/inhibitory DA mRNA expression (both line main effects, P<0.05). Wheel running distance was significantly, positively correlated with the ratio of excitatory/inhibitory DA mRNA expression across animals. In both lines, OVX reduced wheel running (P<0.05). Unexpectedly, although HCR started with significantly greater voluntary wheel running, they had greater OVX-induced reduction in wheel running than LCR such that no differences were found 11weeks after OVX between HCROVX and LCROVX (interaction, P<0.05). This significant reduction in wheel running in HCR was associated with an OVX-mediated reduction in the ratio of excitatory/inhibitory DA mRNA expression. CONCLUSION The DA system in the NAc region may play a significant role in motivation to run in female rats. Compared to LCR, HCR rats run significantly more, which associates with greater ratio of excitatory/inhibitory DA mRNA expression. However, despite greater inherent motivation to run and an associated brain DA mRNA expression profile, HCR rats are not protected against OVX-induced reduction in wheel running or OVX-mediated reduction in the ratio of excitatory/inhibitory DA receptor mRNA expression. OVX-mediated reduction in motivated physical activity may be partially explained by a reduced ratio of excitatory/inhibitory DA receptor mRNA expression for which intrinsic fitness does not confer protection.
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Affiliation(s)
- Young-Min Park
- Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
| | - Jill A Kanaley
- Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
| | - Jaume Padilla
- Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA; Child Health, University of Missouri, Columbia, MO, USA; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, USA
| | - Terese Zidon
- Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
| | - Rebecca J Welly
- Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
| | - Matthew J Will
- Psychological Sciences, University of Missouri, Columbia, MO, USA
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | | | - Frank W Booth
- Biomedical Sciences, University of Missouri, Columbia, MO, USA
| | - John P Thyfault
- Department of Molecular Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA
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Hicks JA, Hatzidis A, Arruda NL, Gelineau RR, De Pina IM, Adams KW, Seggio JA. Voluntary wheel-running attenuates insulin and weight gain and affects anxiety-like behaviors in C57BL6/J mice exposed to a high-fat diet. Behav Brain Res 2016; 310:1-10. [PMID: 27154535 DOI: 10.1016/j.bbr.2016.04.051] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 04/11/2016] [Accepted: 04/28/2016] [Indexed: 12/17/2022]
Abstract
It is widely accepted that lifestyle plays a crucial role on the quality of life in individuals, particularly in western societies where poor diet is correlated to alterations in behavior and the increased possibility of developing type-2 diabetes. While exercising is known to produce improvements to overall health, there is conflicting evidence on how much of an effect exercise has staving off the development of type-2 diabetes or counteracting the effects of diet on anxiety. Thus, this study investigated the effects of voluntary wheel-running access on the progression of diabetes-like symptoms and open field and light-dark box behaviors in C57BL/6J mice fed a high-fat diet. C57BL/6J mice were placed into either running-wheel cages or cages without a running-wheel, given either regular chow or a high-fat diet, and their body mass, food consumption, glucose tolerance, insulin and c-peptide levels were measured. Mice were also exposed to the open field and light-dark box tests for anxiety-like behaviors. Access to a running-wheel partially attenuated the obesity and hyperinsulinemia associated with high-fat diet consumption in these mice, but did not affect glucose tolerance or c-peptide levels. Wheel-running strongly increased anxiety-like and decreased explorative-like behaviors in the open field and light-dark box, while high-fat diet consumption produced smaller increases in anxiety. These results suggest that voluntary wheel-running can assuage some, but not all, of the physiological problems associated with high-fat diet consumption, and can modify anxiety-like behaviors regardless of diet consumed.
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Affiliation(s)
- Jasmin A Hicks
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA
| | - Aikaterini Hatzidis
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA
| | - Nicole L Arruda
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA
| | - Rachel R Gelineau
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA
| | - Isabella Monteiro De Pina
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA
| | - Kenneth W Adams
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA
| | - Joseph A Seggio
- Department of Biological Sciences, Bridgewater State University, 24 Park Ave., Bridgewater, MA 02325, USA.
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Ruegsegger GN, Speichinger KR, Manier JB, Younger KM, Childs TE, Booth FW. Hypothalamic Npy mRNA is correlated with increased wheel running and decreased body fat in calorie-restricted rats. Neurosci Lett 2016; 618:83-88. [PMID: 26921453 DOI: 10.1016/j.neulet.2016.02.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/04/2016] [Accepted: 02/21/2016] [Indexed: 01/08/2023]
Abstract
The neuro-molecular mechanisms that regulate the relationship between physical activity level, energy homeostasis regulation, and body fat are unclear. Thus, we aimed to investigate the relationship between mRNAs in the hypothalamic arcuate nucleus (ARC) related to energy homeostasis, wheel running distance, and body fat in ad lib (AL) and calorie-restricted (CR) growing rats. We hypothesized that changes in select mRNAs (Pomc, Cart, Agrp, Npy, Lepr, Insr, Mc4r, Ampk, Sirt1, Sirt3) in CR would be associated with decreases in body fat percentage and increased wheel running behavior. Male Wistar rats were given access to voluntary running wheels at 4 weeks of age and randomized into AL (n=8) and CR (70% of AL; n=7) groups at 5 weeks of age until study termination at 12 weeks of age. Body composition, serum leptin, insulin, and adiponectin, and ARC mRNA expression in AL and CR rats were assessed and correlated with week-12 running distance to examine potential relationships that may exist. By 12 weeks of age, wheel running was increased ∼3.3-fold (p=0.03) while body fat percentage was ∼2-fold lower in CR compared to AL (p=0.001). Compared to AL, ARC Npy mRNA expression was ∼2-fold greater in CR (p=0.02), while Lepr, Insr, Ampk, and Sirt1 mRNA were additionally increased in CR (p<0.05). Significant correlations existed between ARC Npy mRNA levels versus week-12 wheel running distance (r=0.81, p=0.03), body fat (r=-0.93, p<0.01), and between body fat and wheel running (r=-0.83, p=0.02) in CR, but not in AL. These results reveal possible mechanisms by which fat-brain crosstalk may influence physical activity during energy deficit. These data suggest that below a 'threshold' fat content, body fat may drive activity levels, potentially through hypothalamic Npy action.
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Affiliation(s)
- Gregory N Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Katherine R Speichinger
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO 65211, USA
| | - Jacob B Manier
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Kyle M Younger
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO 65211, USA; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65211, USA; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO 65211, USA.
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Bray MS, Loos RJF, McCaffery JM, Ling C, Franks PW, Weinstock GM, Snyder MP, Vassy JL, Agurs-Collins T. NIH working group report-using genomic information to guide weight management: From universal to precision treatment. Obesity (Silver Spring) 2016; 24:14-22. [PMID: 26692578 PMCID: PMC4689320 DOI: 10.1002/oby.21381] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/16/2015] [Accepted: 10/17/2015] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Precision medicine utilizes genomic and other data to optimize and personalize treatment. Although more than 2,500 genetic tests are currently available, largely for extreme and/or rare phenotypes, the question remains whether this approach can be used for the treatment of common, complex conditions like obesity, inflammation, and insulin resistance, which underlie a host of metabolic diseases. METHODS This review, developed from a Trans-NIH Conference titled "Genes, Behaviors, and Response to Weight Loss Interventions," provides an overview of the state of genetic and genomic research in the area of weight change and identifies key areas for future research. RESULTS Although many loci have been identified that are associated with cross-sectional measures of obesity/body size, relatively little is known regarding the genes/loci that influence dynamic measures of weight change over time. Although successful short-term weight loss has been achieved using many different strategies, sustainable weight loss has proven elusive for many, and there are important gaps in our understanding of energy balance regulation. CONCLUSIONS Elucidating the molecular basis of variability in weight change has the potential to improve treatment outcomes and inform innovative approaches that can simultaneously take into account information from genomic and other sources in devising individualized treatment plans.
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Affiliation(s)
- Molly S Bray
- Department of Nutritional Sciences, The University of Texas at AustinAustin, Texas, USA
| | - Ruth JF Loos
- Department of Preventive Medicine, The Charles Bronfman Institute for Personalized Medicine, The Mindich Child Health and Development Institute, The Icahn School of Medicine at Mount SinaiNew York City, New York, USA
| | - Jeanne M McCaffery
- Department of Psychiatry and Human Behavior, Weight Control and Diabetes Research Center, The Alpert Medical School of Brown University/The Miriam HospitalProvidence, Rhode Island, USA
| | - Charlotte Ling
- Department of Clinical Sciences, Skåne University HospitalMalmö, Sweden
| | - Paul W Franks
- Department of Clinical Sciences, Skåne University HospitalMalmö, Sweden
| | | | - Michael P Snyder
- Department of Genetics, Stanford University School of MedicineStanford, California, USA
| | - Jason L Vassy
- Division of General Medicine, Brigham and Women's Hospital and Harvard Medical SchoolBoston, Massachusetts, USA
| | - Tanya Agurs-Collins
- Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of HealthBethesda, Maryland, USA.
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Sex differences in drug addiction and response to exercise intervention: From human to animal studies. Front Neuroendocrinol 2016; 40:24-41. [PMID: 26182835 PMCID: PMC4712120 DOI: 10.1016/j.yfrne.2015.07.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 06/08/2015] [Accepted: 07/10/2015] [Indexed: 02/08/2023]
Abstract
Accumulated research supports the idea that exercise could be an option of potential prevention and treatment for drug addiction. During the past few years, there has been increased interest in investigating of sex differences in exercise and drug addiction. This demonstrates that sex-specific exercise intervention strategies may be important for preventing and treating drug addiction in men and women. However, little is known about how and why sex differences are found when doing exercise-induced interventions for drug addiction. In this review, we included both animal and human that pulled subjects from a varied age demographic, as well as neurobiological mechanisms that may highlight the sex-related differences in these potential to assess the impact of sex-specific roles in drug addiction and exercise therapies.
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Ruegsegger GN, Toedebusch RG, Braselton JF, Roberts CK, Booth FW. Reduced metabolic disease risk profile by voluntary wheel running accompanying juvenile Western diet in rats bred for high and low voluntary exercise. Physiol Behav 2015; 152:47-55. [DOI: 10.1016/j.physbeh.2015.09.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 08/27/2015] [Accepted: 09/01/2015] [Indexed: 12/14/2022]
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Hyatt HW, Toedebusch RG, Ruegsegger G, Mobley CB, Fox CD, McGinnis GR, Quindry JC, Booth FW, Roberts MD, Kavazis AN. Comparative adaptations in oxidative and glycolytic muscle fibers in a low voluntary wheel running rat model performing three levels of physical activity. Physiol Rep 2015; 3:3/11/e12619. [PMID: 26603455 PMCID: PMC4673647 DOI: 10.14814/phy2.12619] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 10/15/2015] [Indexed: 01/06/2023] Open
Abstract
A unique polygenic model of rat physical activity has been recently developed where rats were selected for the trait of low voluntary wheel running. We utilized this model to identify differences in soleus and plantaris muscles of sedentary low voluntary wheel running rats and physically active low voluntary wheel running rats exposed to moderate amounts of treadmill training. Three groups of 28-day-old male Wistar rats were used: (1) rats without a running wheel (SEDENTARY, n = 7), (2) rats housed with a running wheel (WHEEL, n = 7), and (3) rats housed with a running wheel and exercised on the treadmill (5 days/week for 20 min/day at 15.0 m/min) (WHEEL + TREADMILL, n = 7). Animals were euthanized 5 weeks after the start of the experiment and the soleus and plantaris muscles were excised and used for analyses. Increases in skeletal muscle gene expression of peroxisome proliferator-activated receptor gamma coactivator 1 alpha and fibronectin type III domain-containing protein 5 in WHEEL + TREADMILL group were observed. Also, WHEEL + TREADMILL had higher protein levels of superoxide dismutase 2 and decreased levels of oxidative damage. Our data demonstrate that the addition of treadmill training induces beneficial muscular adaptations compared to animals with wheel access alone. Furthermore, our data expand our understanding of differential muscular adaptations in response to exercise in mitochondrial, antioxidant, and metabolic markers.
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Affiliation(s)
- Hayden W Hyatt
- School of Kinesiology, Auburn University, Auburn, Alabama
| | - Ryan G Toedebusch
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
| | - Greg Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
| | | | - Carlton D Fox
- School of Kinesiology, Auburn University, Auburn, Alabama
| | | | - John C Quindry
- School of Kinesiology, Auburn University, Auburn, Alabama
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
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Abstract
Hunger increases physical activity and stamina to support food-directed foraging behaviors, but underlying mechanisms are unclear. In this issue, Fernandes et al. (2015) show that disruption of leptin-regulated STAT3 signaling in midbrain dopamine neurons increases the rewarding effects of running in mice, which could explain the "high" experienced by endurance runners.
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Ruegsegger GN, Toedebusch RG, Will MJ, Booth FW. Mu opioid receptor modulation in the nucleus accumbens lowers voluntary wheel running in rats bred for high running motivation. Neuropharmacology 2015; 97:171-81. [PMID: 26044640 DOI: 10.1016/j.neuropharm.2015.05.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 04/24/2015] [Accepted: 05/19/2015] [Indexed: 01/03/2023]
Abstract
The exact role of opioid receptor signaling in mediating voluntary wheel running is unclear. To provide additional understanding, female rats selectively bred for motivation of low (LVR) versus high voluntary running (HVR) behaviors were used. Aims of this study were 1) to identify intrinsic differences in nucleus accumbens (NAc) mRNA expression of opioid-related transcripts and 2) to determine if nightly wheel running is differently influenced by bilateral NAc injections of either the mu-opioid receptor agonist D-Ala2, NMe-Phe4, Glyo5-enkephalin (DAMGO) (0.25, 2.5 μg/side), or its antagonist, naltrexone (5, 10, 20 μg/side). In Experiment 1, intrinsic expression of Oprm1 and Pdyn mRNAs were higher in HVR compared to LVR. Thus, the data imply that line differences in opioidergic mRNA in the NAc could partially contribute to differences in wheel running behavior. In Experiment 2, a significant decrease in running distance was present in HVR rats treated with 2.5 μg DAMGO, or with 10 μg and 20 μg naltrexone between hours 0-1 of the dark cycle. Neither DAMGO nor naltrexone had a significant effect on running distance in LVR rats. Taken together, the data suggest that the high nightly voluntary running distance expressed by HVR rats is mediated by increased endogenous mu-opioid receptor signaling in the NAc, that is disturbed by either agonism or antagonism. In summary, our findings on NAc opioidergic mRNA expression and mu-opioid receptor modulations suggest HVR rats, compared to LVR rats, express higher running levels mediated by an increase in motivation driven, in part, by elevated NAc opioidergic signaling.
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Affiliation(s)
- Gregory N Ruegsegger
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States.
| | - Ryan G Toedebusch
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States
| | - Matthew J Will
- Department of Psychological Sciences, University of Missouri, Columbia, MO, United States; Christopher Bond Life Sciences Center, University of Missouri, Columbia MO, United States
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States; Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO, United States; Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, United States; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States
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Mobley CB, Fox CD, Ferguson BS, Pascoe CA, Healy JC, McAdam JS, Lockwood CM, Roberts MD. Effects of protein type and composition on postprandial markers of skeletal muscle anabolism, adipose tissue lipolysis, and hypothalamic gene expression. J Int Soc Sports Nutr 2015; 12:14. [PMID: 25792976 PMCID: PMC4365970 DOI: 10.1186/s12970-015-0076-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 02/20/2015] [Indexed: 01/23/2023] Open
Abstract
Background We examined the acute effects of different dietary protein sources (0.19 g, dissolved in 1 ml of water) on skeletal muscle, adipose tissue and hypothalamic satiety-related markers in fasted, male Wistar rats (~250 g). Methods Oral gavage treatments included: a) whey protein concentrate (WPC, n = 15); b) 70:30 hydrolyzed whey-to-hydrolyzed egg albumin (70 W/30E, n = 15); c) 50 W/50E (n = 15); d) 30 W/70E (n = 15); and e) 1 ml of water with no protein as a fasting control (CTL, n = 14). Results Skeletal muscle analyses revealed that compared to CTL: a) phosphorylated (p) markers of mTOR signaling [p-mTOR (Ser2481) and p-rps6 (Ser235/236)] were elevated 2–4-fold in all protein groups 90 min post-treatment (p < 0.05); b) WPC and 70 W/30E increased muscle protein synthesis (MPS) 104% and 74% 180 min post-treatment, respectively (p < 0.05); and c) 70 W/30E increased p-AMPKα (Thr172) 90 and 180-min post-treatment as well as PGC-1α mRNA 90 min post-treatment. Subcutaneous (SQ) and omental fat (OMAT) analyses revealed: a) 70 W/30 W increased SQ fat phosphorylated hormone-sensitive lipase [p-HSL (Ser563)] 3.1-fold versus CTL and a 1.9–4.4-fold change versus all other test proteins 180 min post-treatment (p < 0.05); and b) WPC, 70 W/30E and 50 W/50E increased OMAT p-HSL 3.8–6.5-fold 180 min post-treatment versus CTL (p < 0.05). 70 W/30E and 30 W/70E increased hypothalamic POMC mRNA 90 min post-treatment versus CTL rats suggesting a satiety-related response may have occurred in the former groups. However, there was a compensatory increase in orexigenic AGRP mRNA in the 70 W/30E group 90 min post-treatment versus CTL rats, and there was a compensatory increase in orexigenic NPY mRNA in the 30 W/70E group 90 min post-treatment versus CTL rats. Conclusions Higher amounts of whey versus egg protein stimulate the greatest post-treatment anabolic skeletal muscle response, though test proteins with higher amounts of WPH more favorably affected post-treatment markers related to adipose tissue lipolysis. Electronic supplementary material The online version of this article (doi:10.1186/s12970-015-0076-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christopher Brooks Mobley
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
| | - Carlton D Fox
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
| | - Brian S Ferguson
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
| | - Corrie A Pascoe
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
| | - James C Healy
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
| | - Jeremy S McAdam
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
| | | | - Michael D Roberts
- School of Kinesiology, Molecular and Applied Sciences Laboratory, Auburn University, 301 Wire Road, Office 286, Auburn, AL 36849 USA
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Rabelo P, Almeida T, Guimarães J, Barcellos L, Cordeiro L, Moraes M, Coimbra C, Szawka R, Soares D. Intrinsic exercise capacity is related to differential monoaminergic activity in the rat forebrain. Brain Res Bull 2015; 112:7-13. [DOI: 10.1016/j.brainresbull.2015.01.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 01/03/2015] [Accepted: 01/13/2015] [Indexed: 12/29/2022]
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Salgado S, Kaplitt MG. The Nucleus Accumbens: A Comprehensive Review. Stereotact Funct Neurosurg 2015; 93:75-93. [PMID: 25720819 DOI: 10.1159/000368279] [Citation(s) in RCA: 291] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Accepted: 09/10/2014] [Indexed: 11/19/2022]
Affiliation(s)
- Sanjay Salgado
- Laboratory of Molecular Neurosurgery, Department of Neurological Surgery, Weill Cornell Medical College, New York, N.Y., USA
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Wheel running reduces high-fat diet intake, preference and mu-opioid agonist stimulated intake. Behav Brain Res 2015; 284:1-10. [PMID: 25668514 DOI: 10.1016/j.bbr.2015.02.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 01/29/2015] [Accepted: 02/02/2015] [Indexed: 11/23/2022]
Abstract
The ranges of mechanisms by which exercise affects energy balance remain unclear. One potential mechanism may be that exercise reduces intake and preference for highly palatable, energy dense fatty foods. The current study used a rodent wheel running model to determine whether and how physical activity affects HF diet intake/preference and reward signaling. Experiment 1 examined whether wheel running affected the ability of intracerebroventricular (ICV) μ opioid receptor agonist D-Ala2, NMe-Phe4, Glyol5-enkephalin (DAMGO) to increase HF diet intake. Experiment 2 examined the effects of wheel running on the intake of and preference for a previously preferred HF diet. We also assessed the effects of wheel running and diet choice on mesolimbic dopaminergic and opioidergic gene expression. Experiment 1 revealed that wheel running decreased the ability of ICV DAMGO administration to stimulate HF diet intake. Experiment 2 showed that wheel running suppressed weight gain and reduced intake and preference for a previously preferred HF diet. Furthermore, the mesolimbic gene expression profile of wheel running rats was different from that of their sedentary paired-fed controls but similar to that of sedentary rats with large HF diet consumption. These data suggest that alterations in preference for palatable, energy dense foods play a role in the effects of exercise on energy homeostasis. The gene expression results also suggest that the hedonic effects of exercise may substitute for food reward to limit food intake and suppress weight gain.
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Cocaine-induced locomotor activity in rats selectively bred for low and high voluntary running behavior. Psychopharmacology (Berl) 2015; 232:673-81. [PMID: 25106389 DOI: 10.1007/s00213-014-3698-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 07/28/2014] [Indexed: 02/06/2023]
Abstract
RATIONALE The rewarding effects of physical activity and abused drugs are caused by stimulation of similar brain pathways. Low (LVR) and high (HVR) voluntary running lines were developed by selectively breeding Wistar rats on running distance performance on postnatal days 28-34. We hypothesized that LVR rats would be more sensitive to the locomotor-activating effects of cocaine than HVR rats due to their lower motivation for wheel running. OBJECTIVES We investigated how selection for LVR or HVR behavior affects inherited activity responses: (a) open field activity levels, (b) habituation to an open field environment, and (c) the locomotor response to cocaine. METHODS Open field activity was measured for 80 min on three successive days (days 1-3). Data from the first 20 min were analyzed to determine novelty-induced locomotor activity (day 1) and the habituation to the environment (days 1-3). On day 3, rats were acclimated to the chamber for 20 min and then received saline or cocaine (10, 20, or 30 mg/kg) injection. Dopamine transporter (DAT) protein in the nucleus accumbens was measured via Western blot. RESULTS Selecting for low and high voluntary running behavior co-selects for differences in inherent (HVR > LVR) and cocaine-induced (LVR > HVR) locomotor activity levels. The differences in the selected behavioral measures do not appear to correlate with DAT protein levels. CONCLUSIONS LVR and HVR rats are an intriguing physical activity model for studying the interactions between genes related to the motivation to run, to use drugs of abuse, and to exhibit locomotor activity.
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