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Sampaio OGM, Santos SAAR, Damasceno MDBMV, Joventino LB, Campos AR, Cavalcante MB. Repeated ovarian hyperstimulation promotes depression-like behavior in female mice. Horm Behav 2024; 164:105589. [PMID: 38878492 DOI: 10.1016/j.yhbeh.2024.105589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 06/04/2024] [Accepted: 06/10/2024] [Indexed: 08/20/2024]
Abstract
Controlled ovarian hyperstimulation (COH) is a common step for treating infertile couples undergoing assisted reproductive technologies and in female fertility preservation cycles. In some cases, undergoing multiple COHs is required for couples to conceive. Behavioral changes such as anxiety and depression can be caused by ovulation-inducing drugs. Sex steroids play a role in locomotor activity, behavioral changes, and nociception, specifically during fluctuations and sudden drops in estrogen levels. This study evaluated the effect of repeated ovarian hyperstimulation (ROH) on weight, locomotor activity, anxiety-like and depression-like behavior, and nociception in female mice. The animals were divided into two groups: control (placebo; Control) and treated (ROH; Treatment). Ovulation was induced once weekly for 10 consecutive weeks. Locomotor activity (open field test), anxiety-like behavior (elevated plus maze, hole board, and marble burying tests), depression-like behavior (splash and forced swim tests), and nociception (hot plate and Von Frey tests) were evaluated before and after ROH. Statistical analysis was conducted using two-way analysis of variance to evaluate the effects of ROH, age of mice, and their interaction. The results suggested that ROH contributed to weight gain, increased locomotor activity, and induced depression-like behavior in female mice. Furthermore, the age of the mouse contributed to weight gain, increased locomotor activity, and induced anxiety-like and depression-like behavior in female mice. ROH could change the behavior of female mice, particularly inducing depression-like behavior. Further studies are required to evaluate various COH protocols, specifically with drugs that prevent fluctuations and drastic drops in estrogen levels, such as aromatase inhibitors.
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Affiliation(s)
| | | | | | | | - Adriana Rolim Campos
- Graduate Program in Medical Sciences, Universidade de Fortaleza (UNIFOR), Fortaleza, CE 60.811-905, Brazil; Experimental Biology Center, Universidade de Fortaleza (UNIFOR), Fortaleza, CE 60.811-905, Brazil
| | - Marcelo Borges Cavalcante
- Graduate Program in Medical Sciences, Universidade de Fortaleza (UNIFOR), Fortaleza, CE 60.811-905, Brazil; Medical School, Universidade de Fortaleza (UNIFOR), Fortaleza, CE 60.811-905, Brazil; CONCEPTUS - Reproductive Medicine, Fortaleza, CE 60.170-240, Brazil.
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2
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Mathis V, Wegman-Points L, Pope B, Lee CMJ, Mohamed M, Rhodes JS, Clark PJ, Clayton S, Yuan LL. Estrogen-mediated individual differences in female rat voluntary running behavior. J Appl Physiol (1985) 2024; 136:592-605. [PMID: 38299221 PMCID: PMC11212800 DOI: 10.1152/japplphysiol.00611.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/08/2024] [Accepted: 01/26/2024] [Indexed: 02/02/2024] Open
Abstract
Regular exercise has numerous health benefits, but the human population displays significant variability in exercise participation. Rodent models, such as voluntary wheel running (VWR) in rats, can provide insight into the underlying mechanisms of exercise behavior and its regulation. In this study, we focused on the role of estrogen on VWR in female rats. Female rats run more than males, and we aimed to determine to what extent running levels in females were regulated by estrogen signaling. The running behavior of rats (duration, speed, and total distance run) was measured under normal physiological conditions, ovariectomy (OVX), and estrogen replacement in an OVX background. Results show cyclic variations in running linked to the estrous cycle. Ovariectomy markedly reduced running and eliminated the cyclic pattern. Estrogen replacement through estradiol benzoate (EB) injections and osmotic minipumps reinstated running activity to pre-OVX levels and restored the cyclic pattern. Importantly, individual differences and ranking are preserved such that high versus low runners before OVX remain high and low runners after treatment. Further analysis revealed that individual variation in running distance was primarily caused by rats running different speeds, but rats also varied in running duration. However, it is noteworthy that this model also displays features distinct from estrogen-driven running behavior under physiological conditions, notably a delayed onset and a broader duration of running activity. Collectively, this estrogen causality VWR model presents a unique opportunity to investigate sex-specific mechanisms that control voluntary physical activity.NEW & NOTEWORTHY This study investigates estrogen's role in voluntary wheel running (VWR) behavior in female rats. Female rats exhibit greater running than males, with estrogen signaling regulating this activity. The estrous cycle influences running, whereas ovariectomy reduces it, and estrogen replacement restores it, maintaining individual differences under all conditions. Both running speed and duration contribute to VWR variations. These findings emphasize individual estrogen regulation in female exercise and provide an estrogen replacement animal model for investigating neurobiological underpinnings that drive voluntary exercise behavior.
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Affiliation(s)
- Victoria Mathis
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
| | - Lauren Wegman-Points
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
| | - Brock Pope
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
| | - Chia-Ming Jimmy Lee
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
| | - Merna Mohamed
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
| | - Justin S Rhodes
- Department of Psychology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Peter J Clark
- Department of Food Science and Human Nutrition, Iowa State University, Ames, Iowa, United States
| | - Sarah Clayton
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
| | - Li-Lian Yuan
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, United States
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Contreras CM, Gutiérrez-García AG. Prelimbic and infralimbic responsivity to amygdala input is modified by gonadal hormones in parallel to low anxiety-like behavior in ovariectomized rats. Behav Brain Res 2024; 459:114795. [PMID: 38048910 DOI: 10.1016/j.bbr.2023.114795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/06/2023]
Abstract
Gonadal hormones may influence sexual activity by reducing anxiety. The basolateral amygdala (BLA) and prelimbic (PL) and infralimbic (IL) cortical regions comprise a loop that is related to fear, anxiety, and social behavior. In female ovariectomized rats, actions of estradiol, progesterone, and sequential estradiol and progesterone administration were explored in the open field test (OFT) and plus maze test (PMT) to evaluate signs of anxiety-like behavior. The three hormonal treatments reduced indicators of anxiety in the PMT but did not influence behavior in the OFT. In the same behaviorally tested rats under urethane anesthesia, single-unit extracellular recordings were obtained from the PL and IL during electrical stimulation of the BLA. The analysis of 250 ms peristimulus histograms showed that BLA stimulation produced two kinds of response. A small group of neurons increased their firing rate after BLA stimulation. Most neurons exhibited a reduction of spiking. Neurons that increased their firing rate after BLA stimulation did not show any difference with the hormonal treatments. In neurons that were inhibited by BLA stimulation, estradiol reduced the neuronal firing rate in the PL and IL, and progesterone alone and the sequential administration of estradiol followed by progesterone administration 24 h later (priming) increased the firing rate during the 240 ms before BLA stimulation. Analyses of responsivity of the PL and IL during electrical stimulation of the BLA indicated that estradiol, progesterone, and estradiol followed by progesterone administration 24 h later (priming) reduced inhibitory actions of the BLA on the PL but not IL. In the BLA-IL connection, progesterone exacerbated the inhibitory response. These findings indicate that anxiolytic actions of estradiol, progesterone, and estradiol followed by progesterone administration 24 h later (priming) correspond to lower BLA-PL responsivity. Actions of progesterone on BLA-IL responsivity appear to contribute to sexual activity by interacting with other forebrain structures that are also related to sexual receptivity.
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Affiliation(s)
- Carlos M Contreras
- Unidad Periférica-Xalapa, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Xalapa, Veracruz, Mexico.
| | - Ana G Gutiérrez-García
- Laboratorio de Neurofarmacología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, Mexico
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Ahmed R, Zyla S, Hammond N, Blum K, Thanos PK. The Role of Estrogen Signaling and Exercise in Drug Abuse: A Review. Clin Pract 2024; 14:148-163. [PMID: 38248436 PMCID: PMC10801537 DOI: 10.3390/clinpract14010012] [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: 11/02/2023] [Revised: 12/13/2023] [Accepted: 12/21/2023] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND Discovering how sex differences impact the efficacy of exercise regimens used for treating drug addiction is becoming increasingly important. Estrogen is a hormone believed to explain a large portion of sex differences observed during drug addiction, and why certain exercise regimens are not equally effective between sexes in treatment. Addiction is currently a global hindrance to millions, many of whom are suffering under the influence of their brain's intrinsic reward system coupled with external environmental factors. Substance abuse disorders in the U.S. alone cost billions of dollars annually. REVIEW SUMMARY Studies involving the manipulation of estrogen levels in female rodents, primarily via ovariectomy, highlight its impact regarding drug addiction. More specifically, female rodents with higher estrogen levels during the estrus phase increase cocaine consumption, whereas those in the non-estrus phase (low estrogen levels) decrease cocaine consumption. If estrogen is reintroduced, self-administration increases once again. Exercise has been proven to decrease relapse tendency, but its effect on estrogen levels is not fully understood. CONCLUSIONS Such findings and results discussed in this review suggest that estrogen influences the susceptibility of females to relapse. Therefore, to improve drug-abuse-related treatment, exercise regimens for females should be generated based on key sex differences with respect to males.
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Affiliation(s)
- Rania Ahmed
- Department of Psychology, University at Buffalo, Buffalo, NY 14203, USA;
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
| | - Samuel Zyla
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
| | - Nikki Hammond
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
| | - Kenneth Blum
- Division of Addiction Research Education, Center for Sports, Exercise and Mental Health, Western University Health Sciences, Pomona, CA 91766, USA;
| | - Panayotis K. Thanos
- Department of Psychology, University at Buffalo, Buffalo, NY 14203, USA;
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY 14203, USA; (S.Z.); (N.H.)
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5
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Irvine A, Gaffney MI, Haughee EK, Horton MA, Morris HC, Harris KC, Corbin JE, Merrill C, Perlis ML, Been LE. Elevated estradiol during a hormone simulated pseudopregnancy decreases sleep and increases hypothalamic activation in female Syrian hamsters. J Neuroendocrinol 2023:e13278. [PMID: 37127859 DOI: 10.1111/jne.13278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 03/24/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Sleep disruptions are a common occurrence during the peripartum period. While physical and environmental factors associated with pregnancy and newborn care account for some sleep disruptions, there is evidence that peripartum fluctuations in estrogens may independently impact sleep. However, the impact of these large fluctuations in estrogens on peripartum sleep is unclear because it is difficult to tease apart the effects of estrogens on sleep from effects associated with the growth and development of the fetus or parental care. We therefore used a hormone-simulated pseudopregnancy (HSP) in female Syrian hamsters to test the hypothesis that pregnancy-like increases in estradiol decrease sleep in the absence of other factors. Adult female Syrian hamsters were ovariectomized and given daily hormone injections that simulate estradiol levels during early pregnancy, late pregnancy, and the postpartum period. Home cage video recordings were captured at seven timepoints and videos were analyzed for actigraphy. During "late pregnancy," total sleep time and sleep efficiency were decreased in hormone-treated animals during the white light period compared to pretest levels. Likewise, during "late pregnancy," locomotion was increased in the white light period for hormone-treated animals compared to pretest levels. These changes continued into the "postpartum period" for animals who continued to receive estradiol treatment, but not for animals who were withdrawn from estradiol. At the conclusion of the experiment, animals were euthanized and cFos expression was quantified in the ventral lateral preoptic area (VLPO) and lateral hypothalamus (LH). Animals who continued to receive high levels of estradiol during the "postpartum" period had significantly more cFos in the VLPO and LH than animals who were withdrawn from hormones or vehicle controls. Together, these data suggest that increased levels of estradiol during pregnancy are associated with sleep suppression, which may be mediated by increased activation of hypothalamic nuclei.
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Affiliation(s)
- Abiola Irvine
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Maeve I Gaffney
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Erin K Haughee
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Marité A Horton
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Hailey C Morris
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Kagan C Harris
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Jaclyn E Corbin
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Clara Merrill
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
| | - Michael L Perlis
- Department of Psychiatry, Behavioral Sleep Medicine Program, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Laura E Been
- Department of Psychology, Neuroscience Program, Haverford College, Haverford, Pennsylvania, USA
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6
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Miller CK, Halbing AA, Patisaul HB, Meitzen J. Interactions of the estrous cycle, novelty, and light on female and male rat open field locomotor and anxiety-related behaviors. Physiol Behav 2020; 228:113203. [PMID: 33045240 DOI: 10.1016/j.physbeh.2020.113203] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 01/15/2023]
Abstract
Animal behavior can be modulated by multiple interacting factors. In rodents such as rats, these factors include, among others, the female estrous cycle, exposure to a novel environment, and light. Here, we used the open field test to disassociate differences in behavior resulting from each of these factors by testing the hypothesis that locomotor and anxiety-related behaviors differ between estrous cycle phases in female rats and that novelty and light exposure concurrently influence these behaviors in both female and male rats. Adult female rats were tested twice under red or white light in estrus and diestrus estrous cycle phases. Adult male rats were also tested twice under either red or white light. In females, an interaction between novelty and estrous cycle phase influenced locomotor and anxiety-related behaviors. In males, novelty influenced locomotor and anxiety-related behaviors differentially under red and white light. Light exposure increased anxiety-related behaviors in both males and females, but reduced locomotor behavior only in females. These findings reveal the complexities of behavioral testing and highlight the importance of factors such as the estrous cycle, novelty, and light exposure.
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Affiliation(s)
- Christiana K Miller
- Graduate Program in Biology, North Carolina State University, Raleigh, NC, United States; W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States; Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States.
| | - Amy A Halbing
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States
| | - Heather B Patisaul
- W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States; Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States; Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, United States
| | - John Meitzen
- W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, United States; Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States; Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, United States
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7
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Renczés E, Borbélyová V, Steinhardt M, Höpfner T, Stehle T, Ostatníková D, Celec P. The Role of Estrogen in Anxiety-Like Behavior and Memory of Middle-Aged Female Rats. Front Endocrinol (Lausanne) 2020; 11:570560. [PMID: 33117285 PMCID: PMC7575693 DOI: 10.3389/fendo.2020.570560] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/02/2020] [Indexed: 12/21/2022] Open
Abstract
Aging in women is associated with low estrogen, but also with cognitive decline and affective disorders. Whether low estrogen is causally responsible for these behavioral symptoms is not clear. Thus, we aimed to examine the role of estradiol in anxiety-like behavior and memory in rats at middle age. Twelve-month old female rats underwent ovariectomy (OVX) or were treated with 1 mg/kg of letrozole-an aromatase inhibitor. In half of the OVX females, 10 μg/kg of 17β-estradiol was supplemented daily for 4 weeks. Vehicle-treated sham-operated and OVX females served as controls. For behavioral assessment open field, elevated plus maze and novel object recognition tests were performed. Interaction between ovarian condition and additional treatment had the main effect on anxiety-like behavior of rats in the open field test. In comparison to control females, OVX females entered less frequently into the center zone of the open field (p < 0.01) and showed lower novel object discrimination (p = 0.05). However, estradiol-supplemented OVX rats had higher number of center-zone entries (p < 0.01), spent more time in the center zone (p < 0.05), and showed lower thigmotaxis (p < 0.01) when compared to OVX group. None of the hormonal manipulations affected anxiety-like behavior in the elevated plus maze test significantly, but a mild effect of interaction between ovarian condition and treatment was shown (p = 0.05). In conclusion, ovariectomy had slight negative effect on open-field ambulation and short-term recognition memory in middle-aged rats. In addition, a test-specific anxiolytic effect of estradiol supplementation was found. In contrast, letrozole treatment neither affected anxiety-like behavior nor memory.
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Affiliation(s)
- Emese Renczés
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
| | - Veronika Borbélyová
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
| | - Manuel Steinhardt
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
| | - Tim Höpfner
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
| | - Thomas Stehle
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
| | - Daniela Ostatníková
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
| | - Peter Celec
- Institute of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
- Institute of Pathophysiology, Faculty of Medicine, Comenius University in Bratislava, Bratislava, Slovakia
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
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Eusemann BK, Patt A, Schrader L, Weigend S, Thöne-Reineke C, Petow S. The Role of Egg Production in the Etiology of Keel Bone Damage in Laying Hens. Front Vet Sci 2020; 7:81. [PMID: 32154276 PMCID: PMC7047165 DOI: 10.3389/fvets.2020.00081] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/31/2020] [Indexed: 01/28/2023] Open
Abstract
Keel bone fractures and deviations belong to the most severe animal welfare problems in laying hens and are influenced by several factors such as husbandry system and genetic background. It is likely that egg production also influences keel bone health due to the high demand of calcium for the eggshell, which is, in part, taken from the skeleton. The high estrogen plasma concentration, which is linked to the high laying performance, may also affect the keel bone as sexual steroids have been shown to influence bone health. The aim of this study was to investigate the relationship between egg production, genetically determined high laying performance, estradiol-17ß concentration, and keel bone characteristics. Two hundred hens of two layer lines differing in laying performance (WLA: high performing; G11: low performing) were divided into four treatment groups: Group S received an implant containing a GnRH agonist that suppressed egg production, group E received an implant containing the sexual steroid estradiol-17ß, group SE received both implants, and group C were kept as control hens. Between the 12th and the 62nd weeks of age, the keel bone of all hens was radiographed and estradiol-17ß plasma concentration was assessed at regular intervals. Non-egg laying hens showed a lower risk of keel bone fracture and a higher radiographic density compared to egg laying hens. Exogenous estradiol-17ß was associated with a moderately higher risk of fracture within egg laying but with a lower risk of fracture and a higher radiographic density within non-egg laying hens. The high performing layer line WLA showed a significantly higher fracture risk but also a higher radiographic density compared to the low performing layer line G11. In contrast, neither the risk nor the severity of deviations were unambiguously influenced by egg production or layer line. We assume that within a layer line, there is a strong association between egg production and keel bone fractures, and, possibly, bone mineral density, but not between egg production and deviations. Moreover, our results confirm that genetic background influences fracture prevalence and indicate that the selection for high laying performance may negatively influence keel bone health.
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Affiliation(s)
| | - Antonia Patt
- Institute of Animal Welfare and Animal Husbandry, Friedrich-Loeffler-Institut, Celle, Germany
| | - Lars Schrader
- Institute of Animal Welfare and Animal Husbandry, Friedrich-Loeffler-Institut, Celle, Germany
| | - Steffen Weigend
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Mariensee, Germany
| | - Christa Thöne-Reineke
- Institute of Animal Welfare, Animal Behavior and Laboratory Animal Science, Freie Universität Berlin, Berlin, Germany
| | - Stefanie Petow
- Institute of Animal Welfare and Animal Husbandry, Friedrich-Loeffler-Institut, Celle, Germany
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9
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Miller CK, Krentzel AA, Patisaul HB, Meitzen J. Metabotropic glutamate receptor subtype 5 (mGlu 5) is necessary for estradiol mitigation of light-induced anxiety behavior in female rats. Physiol Behav 2019; 214:112770. [PMID: 31830486 DOI: 10.1016/j.physbeh.2019.112770] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/20/2019] [Accepted: 12/06/2019] [Indexed: 02/07/2023]
Abstract
Anxiety-related behaviors are influenced by steroid hormones such as 17β-estradiol and environmental stimuli such as acute stressors. For example, rats exhibit increased anxiety-related behaviors in the presence, but not the absence, of light. In females, estradiol potentially mitigates these effects. Experiments across behavioral paradigms and brain regions indicate that estradiol action can be mediated via activation of metabotropic glutamate receptors, including Group I subtype five (mGlu5). mGlu5 has been implicated in mediating estradiol's effects upon psychostimulant-induced behaviors, dopamine release and neuron phenotype in striatal regions. Whether estradiol activation of mGlu5 modulates anxiety or locomotor behavior in the absence of psychostimulants is unknown. Here we test if mGlu5 is necessary for estradiol mitigation of light-induced acute anxiety and locomotor behaviors. Ovariectomized adult female rats were pre-treated with either the mGlu5 antagonist MPEP or saline before estradiol or oil treatment. Anxiety and locomotor behaviors were assessed in the presence or absence of white light to induce high and low acute anxiety behavior phenotypes, respectively. In the presence of white light, estradiol treatment mitigated light-induced anxiety-related behaviors but not overall locomotor activity. MPEP treatment blocked estradiol effects upon light-induced anxiety-related behaviors but did not affect overall locomotor activity. In the absence of white light, estradiol or MPEP treatment did not influence anxiety-related behaviors or locomotor activity, consistent with a low anxiety phenotype. These novel findings indicate that mGlu5 activation is necessary for estradiol mitigation of anxiety-related behaviors induced by an acute stressor.
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Affiliation(s)
- Christiana K Miller
- Graduate Program in Biology, North Carolina State University, Raleigh, NC, USA; W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA.
| | - Amanda A Krentzel
- W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA; Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - Heather B Patisaul
- W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA; Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA; Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, USA
| | - John Meitzen
- W.M. Keck Center for Behavioral Biology, North Carolina State University, Raleigh, NC, USA; Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA; Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, USA
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10
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Kabbaj M, Wang Z. Neurobiology of motivated behaviors. Integr Zool 2018; 13:613-615. [PMID: 30251389 DOI: 10.1111/1749-4877.12359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mohamed Kabbaj
- Professor of Biomedical Sciences & Neuroscience Florida State University, Tallahassee, Florida, USA
| | - Zuoxin Wang
- Professor of Psychology & Neuroscience Florida State University, Tallahassee, Florida, USA
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