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Reguilón MD, Ferrer-Pérez C, Manzanedo C, Miñarro J, Rodríguez-Arias M. Voluntary wheel running during adolescence prevents the increase in ethanol intake induced by social defeat in male mice. Psychopharmacology (Berl) 2023:10.1007/s00213-023-06461-0. [PMID: 37736785 DOI: 10.1007/s00213-023-06461-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 08/29/2023] [Indexed: 09/23/2023]
Abstract
RATIONALE Exposure to social defeat (SD) induces a depressive phenotype, increased ethanol seeking and consumption, accompanied by activation of the neuroinflammatory response. However, a resilient response can be potentiated through physical exercise in the form of voluntary wheel running (VWR) during or after exposure to social stress. Therefore, the aim of this study was to test whether physical exercise during adolescence prior to being exposed to SD can enhance resilience to the increase in ethanol intake. METHODS Male mice had access to VWR during adolescence and the effects of social defeat (4 sessions every 72 h) on oral ethanol self-administration (SA) was evaluated. Based on the social interaction test, mice were classified as resilient or susceptible to depressive-like behavior. Two weeks after the last encounter, mice were subjected to the drinking in the dark and oral ethanol SA paradigms. Mice were then sacrificed to measure brain-derived neurotrophic factor (BDNF) levels in the striatum and hippocampus. RESULTS As expected, susceptible mice increased ethanol intake in the oral SA protocol. However, susceptible mice in the exercise condition did not increase ethanol intake, showing similar consumption and motivation for ethanol than the control and resilient groups. On the other hand, decreased BDNF levels were observed in susceptible mice in both experimental conditions compared to the control groups after ethanol SA. CONCLUSIONS The pre-exposure of VWR prevented the increase in consumption and motivation for ethanol induced by SD in susceptible mice. On the other hand, it appears that VWR did not exhibit any significant long-term effects on BDNF signaling, which is mainly affected in susceptible mice after ethanol intake.
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Affiliation(s)
- Marina D Reguilón
- Unit of Research on Psychobiology of Drug Dependence, Department of Psychobiology, Faculty of Psychology, Universitat de València, Avda. Blasco Ibáñez 21, 46010, Valencia, Spain
| | - Carmen Ferrer-Pérez
- Departmento de Psicología Evolutiva, Facultad de Psicología, Universitat de València, Valencia, Spain
| | - Carmen Manzanedo
- Unit of Research on Psychobiology of Drug Dependence, Department of Psychobiology, Faculty of Psychology, Universitat de València, Avda. Blasco Ibáñez 21, 46010, Valencia, Spain
| | - José Miñarro
- Unit of Research on Psychobiology of Drug Dependence, Department of Psychobiology, Faculty of Psychology, Universitat de València, Avda. Blasco Ibáñez 21, 46010, Valencia, Spain
| | - Marta Rodríguez-Arias
- Unit of Research on Psychobiology of Drug Dependence, Department of Psychobiology, Faculty of Psychology, Universitat de València, Avda. Blasco Ibáñez 21, 46010, Valencia, Spain.
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Meyer C, Schoettner K, Amir S. The effects of circadian desynchronization on alcohol consumption and affective behavior during alcohol abstinence in female rats. Front Behav Neurosci 2022; 16:1044783. [PMID: 36620855 PMCID: PMC9813852 DOI: 10.3389/fnbeh.2022.1044783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022] Open
Abstract
Disruption of circadian rhythmicity distorts physiological and psychological processes and has major consequences on health and well-being. A chronic misalignment within the internal time-keeping system modulates alcohol consumption and contributes to stress-related psychiatric disorders which are known to trigger alcohol misuse and relapse. While there is growing evidence of the deleterious impact of circadian disruption on male physiology and behavior, knowledge about the effect in females remains limited. The present study aims to fill the gap by assessing the relationship between internal desynchronization and alcohol intake behavior in female rats. Female Wistar rats kept under standard 24-h, 22-h light-dark conditions, or chronic 6-h advanced phase shifts, were given intermittent access to 20% alcohol followed by an extended alcohol deprivation period. Alcohol consumption under altered light-dark (LD) conditions was assessed and emotional behavior during alcohol abstinence was evaluated. Internally desynchronization in female rats does not affect alcohol consumption but alters scores of emotionality during alcohol abstinence. Changes in affective-like behaviors were accompanied by reduced body weight gain and estrous irregularities under aberrant LD conditions. Our data suggest that internal desynchronization caused by environmental factors is not a major factor contributing to the onset and progression of alcohol abuse, but highlights the need of maintaining circadian hygiene as a supportive remedy during alcohol rehabilitation.
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Centanni SW, Conley SY, Luchsinger JR, Lantier L, Winder DG. The impact of intermittent exercise on mouse ethanol drinking and abstinence-associated affective behavior and physiology. Alcohol Clin Exp Res 2022; 46:114-128. [PMID: 34773282 PMCID: PMC9152923 DOI: 10.1111/acer.14742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND Negative emotional states are associated with the initiation and maintenance of alcohol use and drive relapse to drinking during withdrawal and protracted abstinence. Physical exercise is correlated with decreased negative affective symptoms, although a direct relationship between drinking patterns and exercise level has not been fully elucidated. METHODS We incorporated intermittent running wheel access into a chronic continuous access, two-bottle choice alcohol drinking model in female C57BL/6J mice. Wheel access was granted intermittently once mice established a preference for alcohol over water. After 6 weeks, alcohol was removed (forced abstinence) and mice were given continuous access to unlocked or locked wheels. Negative affect-like behavior, home cage behavior, and metabolic activity were measured during protracted abstinence. RESULTS Wheel access shifted drinking patterns in the mice, increasing drinking when the wheel was locked, and decreasing drinking when unlocked. Moreover, alcohol preference and consumption were strongly negatively correlated with the amount of running. An assessment of negative affect-like behavior in abstinence via the novelty suppressed feeding and saccharin preference tests (SPT) showed that unlimited wheel access mitigated abstinence-induced latency increases. Mice in abstinence also spent more time sleeping during the active dark cycle than control mice, providing additional evidence for abstinence-induced anhedonia- and depression-like behavior. Furthermore, running wheel access in abstinence decreased dark cycle sleep to comparable alcohol- and wheel-naïve mice. Given the positive impact of exercise and the negative impact of alcohol on metabolic health, we compared metabolic phenotypes of alcohol-abstinent mice with and without wheel access. Wheel access increased energy expenditure, carbon dioxide production, and oxygen consumption, providing a potential metabolic mechanism through which wheel access improves affective state. CONCLUSIONS This study suggests that including exercise in AUD treatment regimens has the potential to reduce drinking, improve affective state during abstinence and could serve as a non-pharmacological approach to prevent the development of an AUD in high-risk individuals.
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Affiliation(s)
- Samuel W. Centanni
- Vanderbilt Center for Addiction Research,,Molecular Physiology & Biophysics, the,Vanderbilt Brain Institute,,Vanderbilt J.F. Kennedy Center for Research on Human Development
| | | | - Joseph R. Luchsinger
- Vanderbilt Center for Addiction Research,,Molecular Physiology & Biophysics, the,Vanderbilt Brain Institute,,Vanderbilt J.F. Kennedy Center for Research on Human Development
| | - Louise Lantier
- Molecular Physiology & Biophysics, the,Vanderbilt J.F. Kennedy Center for Research on Human Development,,Department of Psychiatry and Behavioral Sciences,,Mouse Metabolic Phenotyping Center, Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Danny G. Winder
- Vanderbilt Center for Addiction Research,,Molecular Physiology & Biophysics, the,Vanderbilt Brain Institute,,Vanderbilt J.F. Kennedy Center for Research on Human Development,,Department of Psychiatry and Behavioral Sciences,,Mouse Metabolic Phenotyping Center, Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA
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Reguilón MD, Ferrer-Pérez C, Ballestín R, Miñarro J, Rodríguez-Arias M. Voluntary wheel running protects against the increase in ethanol consumption induced by social stress in mice. Drug Alcohol Depend 2020; 212:108004. [PMID: 32408137 DOI: 10.1016/j.drugalcdep.2020.108004] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 04/06/2020] [Accepted: 04/06/2020] [Indexed: 12/11/2022]
Abstract
Previous studies have shown that exposure to social defeat (SD), a model of social stress, produces a long-term increase in the consumption of ethanol, most likely through an increase in the neuroinflammation response. The aim of the present study was to evaluate whether exposure to physical activity in the form of voluntary wheel running (VWR) could block the increase in ethanol consumption and the neuroinflammatory response induced by social stress. Mice were exposed to either 4 sessions of repeated social defeat (RSD) or a non-stressful experience. During the whole procedure, half of the mice were exposed to controlled physical activity, being allowed 1 h access to a low-profile running wheel three times a week. Three weeks after the last RSD, animals started the oral self-administration (SA) of ethanol (6% EtOH) procedure. Biological samples were taken 4 h after the first and the fourth RSD, 3 weeks after the last RSD, and after the SA procedure. Brain tissue (striatum) was used to determine protein levels of the chemokines fractalkine (CX3CL1) and SDF-1 (CXCL12). RSD induced an increase in ethanol consumption and caused greater motivation to obtain ethanol. The striatal levels of CX3CL1 and CXCL12 were also increased after the last RSD. VWR was able to reverse the increase in ethanol intake induced by social stress and the neuroinflammatory response. In conclusion, our results suggest that VWR could be a promising tool to prevent and reduce the detrimental effects induced by social stress.
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Affiliation(s)
- M D Reguilón
- Department of Psychobiology, Facultad De Psicología, Universitat De Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain
| | - C Ferrer-Pérez
- Department of Psychobiology, Facultad De Psicología, Universitat De Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain
| | - R Ballestín
- Department of Psychobiology, Facultad De Psicología, Universitat De Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain
| | - J Miñarro
- Department of Psychobiology, Facultad De Psicología, Universitat De Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain
| | - M Rodríguez-Arias
- Department of Psychobiology, Facultad De Psicología, Universitat De Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain.
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Suppression of voluntary ethanol intake in mice under constant light and constant darkness. Alcohol 2020; 83:37-46. [PMID: 31175946 DOI: 10.1016/j.alcohol.2019.05.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 05/03/2019] [Accepted: 05/29/2019] [Indexed: 11/22/2022]
Abstract
Seasonal variations in photoperiod are associated with alterations in human mood and behavior. Similarly, manipulation of the environmental lighting regimen can exert pronounced effects on affective behavior in experimental animals. These observations may be due, in part, to light-induced alterations in circadian rhythms, but it seems likely that other, non-circadian factors also contribute. Several studies have shown that voluntary alcohol (ethanol) consumption can be affected by lighting conditions in rodents, suggesting that photoperiodic variation may account for seasonal and geographic patterns of human alcohol consumption. Nevertheless, the existing animal data are somewhat inconsistent, and little work in this area has been performed in mice. In the present study, we monitored circadian activity rhythms and voluntary ethanol consumption under standard 12:12 light-dark (LD) cycles, and in constant light (LL) and constant darkness (DD). Experiment 1 employed male C3H/He inbred mice, while Experiment 2 employed males and females from a genetically heterogeneous line (WSC). Relative to LD conditions, ethanol intake and ethanol preference were reduced under both LL and DD in both experiments. Because similar effects were seen in both LL and DD, neither circadian disruption nor a classical photoperiodic mechanism are likely to account fully for these findings. Instead, we suggest that the absence of circadian entrainment may function as a mild stressor, resulting in reduced ethanol consumption.
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Chronic repeated predatory stress induces resistance to quinine adulteration of ethanol in male mice. Behav Brain Res 2020; 382:112500. [PMID: 31978491 DOI: 10.1016/j.bbr.2020.112500] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/17/2020] [Accepted: 01/20/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Trauma related psychiatric disorders, such as posttraumatic stress disorder (PTSD), and alcohol use disorder (AUD) are highly comorbid illnesses that separately present an opposing, sex-specific pattern, with increased prevalence of PTSD in females and increased prevalence of AUD diagnoses in males. Likewise, PTSD is a risk factor in the development of AUD, with conflicting data on the impact of sex in the comorbid development of both disorders. Because the likelihood of experiencing more than one traumatic event is high, we aim to utilize chronic repeated predatory stress (CRPS) to query the extent to which sex interacts with CRPS to influence alcohol consumption, or cessation of consumption. METHODS Male (n = 16) and female (n = 15) C57BL/6 J mice underwent CRPS or daily handling for two weeks during adolescence (P35-P49) and two weeks during adulthood (P65-P79). Following the conclusion of two rounds of repeated stress, behavior was assessed in the open field. Mice subsequently underwent a two-bottle choice intermittent ethanol access (IEA) assessment (P90-131) with the options of 20 % ethanol or water. After establishing drinking behavior, increasing concentrations of quinine were added to the ethanol to assess the drinking response to adulteration of the alcohol. RESULTS CRPS increased fecal corticosterone concentrations and anxiety-like behaviors in the open field in both male and female mice as compared to control mice that had not been exposed to CRPS. Consistent with previous reports, we observed a sex difference in alcohol consumption such that females consumed more ethanol per gram of body mass than males. In addition, CRPS reduced alcohol aversion in male mice such that higher concentrations of quinine were necessary to reduce alcohol intake as compared to control mice. CRPS did not alter alcohol-related behaviors in female mice. CONCLUSION Collectively, we demonstrate that repeated CRPS can induce anxiety-like behavior in both sexes but selectively influences the response to ethanol adulteration in males.
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Booher WC, Reyes Martínez GJ, Ehringer MA. Behavioral and neuronal interactions between exercise and alcohol: Sex and genetic differences. GENES BRAIN AND BEHAVIOR 2020; 19:e12632. [DOI: 10.1111/gbb.12632] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Winona C. Booher
- Institute for Behavioral GeneticsUniversity of Colorado Boulder Colorado
- Department of Integrative PhysiologyUniversity of Colorado Boulder Colorado
| | - Guillermo J. Reyes Martínez
- Institute for Behavioral GeneticsUniversity of Colorado Boulder Colorado
- Department of Integrative PhysiologyUniversity of Colorado Boulder Colorado
| | - Marissa A. Ehringer
- Institute for Behavioral GeneticsUniversity of Colorado Boulder Colorado
- Department of Integrative PhysiologyUniversity of Colorado Boulder Colorado
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Booher WC, Hoft NR, Ehringer MA. The effect of voluntary wheel running on 129/SvEvTac and C3H/Ibg alcohol consumption. Alcohol 2019; 77:91-99. [PMID: 30616894 DOI: 10.1016/j.alcohol.2018.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/24/2018] [Accepted: 10/20/2018] [Indexed: 12/15/2022]
Abstract
The mesolimbic dopaminergic reward pathway is activated by both alcohol and exercise, suggesting exercise as a possible treatment or preventative method for alcohol-use disorders (AUDs). Prior studies conducted in our lab have demonstrated the hedonic substitution of voluntary alcohol consumption for voluntary wheel running in female C57Bl/6Ibg mice, and a trend in male C57Bl/6Ibg mice. Given the important contribution of genetic background on AUDs, this study aims to assess the effects of voluntary wheel running on voluntary alcohol consumption in two moderate alcohol-consuming strains of mice, C3H/Ibg and 129/SvEvTac. Contrary to our previous studies conducted in C57Bl/6Ibg mice, 129/SvEvTac and male C3H/Ibg mice housed without a wheel consumed significantly more alcohol than mice housed with a free or locked wheel. This suggests that 129/SvEvTac and male C3H/Ibg mice are reducing their alcohol consumption due to an enriched environment and not exercise. Interestingly, the three groups of female C3H/Ibg mice (free wheel, locked wheel, no wheel) did not significantly differ in alcohol consumption, suggesting sex-specific differences in C3H/Ibg mice. In addition, genetic and sex effects were observed for running phenotypes in the presence of alcohol. Female 129/SvEvTac and C57Bl/6Ibg mice ran longer distances than male mice, whereas male and female C3H/Ibg mice did not differ in distance run. C3H/Ibg and female 129/SvEvTav mice with access only to water ran longer distances than mice with access to both alcohol and water. However, this effect was not observed in C57Bl/6Ibg or male 129/SvEvTac mice. The results of this mouse model highlight the importance of genetic background and sex on an animal's response to exercise as an enrichment to reduce voluntary alcohol consumption.
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Archer T, Badgaiyan RD, Blum K. Physical Exercise Interventions for Drug Addictive Disorders. JOURNAL OF REWARD DEFICIENCY SYNDROME AND ADDICTION SCIENCE 2017; 3:17-20. [PMID: 29034367 PMCID: PMC5640325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Trevor Archer
- Department of Psychology, University of Gothenburg, Gothenburg, Sweden,Correspondence to: Trevor Archer, PhD, Department of Psychology, University of Gothenburg, Sweden, Tel: +46 31 7864694, 0704-668623,
| | - Rajendra D. Badgaiyan
- Department of Psychiatry, Wright State University School of Medicine, Dayton, OH, USA
| | - Kenneth Blum
- Departments of Psychiatry and Behavioural Sciences, Keck School of Medicine of USC, Los Angeles, CA, USA
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McGonigle CE, Nentwig TB, Wilson DE, Rhinehart EM, Grisel JE. β-endorphin regulates alcohol consumption induced by exercise restriction in female mice. Alcohol 2016; 53:51-60. [PMID: 27286936 DOI: 10.1016/j.alcohol.2016.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 03/14/2016] [Accepted: 04/25/2016] [Indexed: 10/21/2022]
Abstract
Animal models have long been used to study the mechanisms underlying the complex association between alcohol and stress. Female mice prevented from running on a home-cage activity wheel increase voluntary ethanol consumption. β-endorphin is an endogenous opioid involved in negatively regulating the stress response and has also been implicated in the risk for excessive drinking. The present study investigates the role of β-endorphin in moderating free-choice consumption of ethanol in response to a blocked activity wheel. Female, transgenic mice with varying levels of the opioid peptide were given daily 2-h access to 20% ethanol with rotations on a running wheel blocked on alternate days. Subjects with low β-endorphin exhibited enhanced stress sensitivity by self-administering larger quantities of ethanol on days when wheel running was prevented. β-endorphin levels did not influence voluntary activity on the running wheel. There were genotypic differences in plasma corticosterone levels as well as corticotropin-releasing hormone mRNA content in multiple brain regions associated with the stress response in these free drinking and running subjects. Susceptibility to stress is enhanced in female mice with low levels of β-endorphin, and better understanding of the role for this opioid in mitigating the response to stressors may aid in the development of interventions and treatments for excessive use of alcohol in women.
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Homa LD, Burger LL, Cuttitta AJ, Michele DE, Moenter SM. Voluntary Exercise Improves Estrous Cyclicity in Prenatally Androgenized Female Mice Despite Programming Decreased Voluntary Exercise: Implications for Polycystic Ovary Syndrome (PCOS). Endocrinology 2015; 156:4618-28. [PMID: 26360506 PMCID: PMC4655213 DOI: 10.1210/en.2015-1593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Prenatal androgen (PNA) exposure in mice produces a phenotype resembling lean polycystic ovary syndrome. We studied effects of voluntary exercise on metabolic and reproductive parameters in PNA vs vehicle (VEH)-treated mice. Mice (8 wk of age) were housed individually and estrous cycles monitored. At 10 weeks of age, mice were divided into groups (PNA, PNA-run, VEH, VEH-run, n = 8-9/group); those in the running groups received wheels allowing voluntary running. Unexpectedly, PNA mice ran less distance than VEH mice; ovariectomy eliminated this difference. In ovary-intact mice, there was no difference in glucose tolerance, lower limb muscle fiber types, weight, or body composition among groups after 16 weeks of running, although some mitochondrial proteins were mildly up-regulated by exercise in PNA mice. Before running, estrous cycles in PNA mice were disrupted with most days in diestrus. There was no change in cycles during weeks 1-6 of running (10-15 wk of age). In contrast, from weeks 11 to 16 of running, cycles in PNA mice improved with more days in proestrus and estrus and fewer in diestrus. PNA programs reduced voluntary exercise, perhaps mediated in part by ovarian secretions. Exercise without weight loss improved estrous cycles, which if translated could be important for fertility in and counseling of lean women with polycystic ovary syndrome.
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Affiliation(s)
- Lori D Homa
- Departments of Obstetrics and Gynecology (L.D.H., S.M.M.), Molecular and Integrative Physiology (L.L.B., A.J.C., D.E.M., S.M.M.), and Internal Medicine (D.E.M., S.M.M.), University of Michigan, Ann Arbor, Michigan 48109-5622
| | - Laura L Burger
- Departments of Obstetrics and Gynecology (L.D.H., S.M.M.), Molecular and Integrative Physiology (L.L.B., A.J.C., D.E.M., S.M.M.), and Internal Medicine (D.E.M., S.M.M.), University of Michigan, Ann Arbor, Michigan 48109-5622
| | - Ashley J Cuttitta
- Departments of Obstetrics and Gynecology (L.D.H., S.M.M.), Molecular and Integrative Physiology (L.L.B., A.J.C., D.E.M., S.M.M.), and Internal Medicine (D.E.M., S.M.M.), University of Michigan, Ann Arbor, Michigan 48109-5622
| | - Daniel E Michele
- Departments of Obstetrics and Gynecology (L.D.H., S.M.M.), Molecular and Integrative Physiology (L.L.B., A.J.C., D.E.M., S.M.M.), and Internal Medicine (D.E.M., S.M.M.), University of Michigan, Ann Arbor, Michigan 48109-5622
| | - Suzanne M Moenter
- Departments of Obstetrics and Gynecology (L.D.H., S.M.M.), Molecular and Integrative Physiology (L.L.B., A.J.C., D.E.M., S.M.M.), and Internal Medicine (D.E.M., S.M.M.), University of Michigan, Ann Arbor, Michigan 48109-5622
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