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Hormones and Behavior

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https://www.readbyqxmd.com/read/29080672/fezf1-is-a-novel-regulator-of-female-sex-behavior-in-mice
#1
Tomaz Büdefeld, Tanja Spanic, Milka Vrecl, Gregor Majdic
Female sexual behavior is a complex process regulated by multiple brain circuits and influenced by sex steroid hormones acting in the brain. Several regions in the hypothalamus have been implicated in the regulation of female sexual behavior although a complete circuitry involved in female sexual behavior is not understood. Fez family zinc finger 1 (Fezf1) gene is a brain specific gene that has been mostly studied in the context of olfactory development, although in a recent study, FEZF1 has been identified as one of the genes responsible for the development of Kallman syndrome...
November 13, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29054796/testosterone-social-status-and-parental-care-in-a-cooperatively-breeding-bird
#2
Alyxandra E Pikus, Sarah Guindre-Parker, Dustin R Rubenstein
The steroid hormone testosterone not only plays an important role in gamete production, but also influences social and aggressive behavior. Testosterone varies seasonally, peaking when competition for mates is high and declining during parental care. Surprisingly, little is known about how testosterone mediates social conflict and parental care behavior in highly social species like cooperative breeders, where group members compete for breeding opportunities and provide parental or alloparental care. We examined how testosterone differs across breeding roles in the tropical cooperatively breeding superb starling, Lamprotornis superbus...
November 13, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29137973/exposure-to-polybrominated-diphenyl-ethers-pbdes-and-child-behavior-current-findings-and-future-directions
#3
REVIEW
Ann M Vuong, Kimberly Yolton, Kim N Dietrich, Joseph M Braun, Bruce P Lanphear, Aimin Chen
Polybrominated diphenyl ethers (PBDEs) are recognized neurotoxicants, but the extent to which PBDEs influence various domains of behavior in children is not fully understood. As such, we reviewed epidemiologic studies published to date to provide an overview of the current state of knowledge on PBDEs' potential role in behavioral development. We identified 19 epidemiologic studies reporting on associations of prenatal and childhood concentrations of PBDEs with behaviors assessed in children from 1 to 12years, including executive function, attention, externalizing and internalizing behaviors, adaptive skills, and social behaviors/Autism Spectrum Disorder (ASD)...
November 11, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29133180/exposure-to-perfluoroalkyl-substances-during-pregnancy-and-child-behaviour-at-5-to-9years-of-age
#4
Birgit Bjerre Høyer, Jens Peter Bonde, Sandra Søgaard Tøttenborg, Cecilia Høst Ramlau-Hansen, Christian Lindh, Henning Sloth Pedersen, Gunnar Toft
We examined associations between prenatal exposure to perfluorohexane sulfonic acid (PFHxS), perfluoroheptanoic acid (PFHpA), perfluorononanoic acid (PFNA), and perfluorodecanic acid (PFDA) - and child behaviour (SDQ-total) and hyperactivity (sub-scale) at 5-9years of age in birth cohorts from Greenland and Ukraine. Pregnancy serum samples (N=1023) were analysed for perfluoroalkyl substances (PFASs) and categorized into tertiles and also used as continuous exposure variables. Problem behaviour and hyperactivity were assessed, using the Strength and Difficulties Questionnaire (SDQ) and categorized as normal/borderline and abnormal...
November 10, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29129624/women-s-preferences-for-men-s-beards-show-no-relation-to-their-ovarian-cycle-phase-and-sex-hormone-levels
#5
Barnaby J W Dixson, Anthony J Lee, Khandis R Blake, Grazyna Jasienska, Urszula M Marcinkowska
According to the ovulatory shift hypothesis, women's mate preferences for male morphology indicative of competitive ability, social dominance, and/or underlying health are strongest at the peri-ovulatory phase of the menstrual cycle. However, recent meta-analyses are divided on the robustness of such effects and the validity of the often-used indirect estimates of fertility and ovulation has been called into question in methodological studies. In the current study, we test whether women's preferences for men's beardedness, a cue of male sexual maturity, androgenic development and social dominance, are stronger at the peri-ovulatory phase of the menstrual cycle compared to during the early follicular or the luteal phase...
November 9, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29129623/alterations-of-brain-volumes-in-women-with-early-life-maltreatment-and-their-associations-with-oxytocin
#6
Emilia L Mielke, Corinne Neukel, Katja Bertsch, Corinna Reck, Eva Möhler, Sabine C Herpertz
Early life maltreatment (ELM) is associated with different neurobiological alterations. Lower oxytocin and altered grey matter volumes (GMV) in brain regions associated with the central oxytocin system, such as the hypothalamus, amygdala, and nucleus accumbens, have been reported in women with ELM. However, the association between peripheral oxytocin and brain morphometry in women with ELM has not been studied yet. We therefore collected blood samples from 33 women with and 25 women without ELM, all without current mental disorders to measure and compare oxytocin levels between the two groups...
November 9, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29128250/sex-specific-hypothalamic-pituitary-gonadal-axis-sensitivity-in-migrating-songbirds
#7
Kristen M Covino, Jodie M Jawor, Sara R Morris, Frank R Moore
In seasonally migratory species, the overlap between the migratory and breeding life history stages is a balance between the physiological and behavioral requirements of each stage. Previous studies investigating the degree to which songbirds prepare for breeding during spring migration have focused on either circulating hormone levels or direct measures of gonadal recrudescence. In this study, we evaluated the phenology of breeding preparation in a long-distance migratory songbird, the Swainson's Thrush (Catharus ustulatus), by assessing hypothalamic-pituitary-gonadal (HPG) axis sensitivity with gonadotropin-releasing hormone (GnRH) bioassays throughout the migratory period...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29111331/mating-and-social-exposure-induces-an-opioid-dependent-conditioned-place-preference-in-male-but-not-in-female-prairie-voles-microtus-ochrogaster
#8
M Ulloa, W Portillo, N F Díaz, L J Young, F J Camacho, V M Rodríguez, R G Paredes
In rodents, sexual stimulation induces a positive affective state that is evaluated by the conditioned place preference (CPP) test. Opioids are released during sexual behavior and modulate the rewarding properties of this behavior. Prairie voles (Microtus ochrogaster) are a socially monogamous species, in which copulation with cohabitation for 6h induces a pair bond. However, the mating-induced reward state that could contribute to the establishment of the long-term pair bond has not been evaluated in this species...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29108778/the-timing-and-duration-of-estradiol-treatment-in-a-rat-model-of-the-perimenopause-influences-on-social-behavior-and-the-neuromolecular-phenotype
#9
Alexandra N Garcia, Christina Depena, Kelsey Bezner, Weiling Yin, Andrea C Gore
This study tested the effects of timing and duration of estradiol (E2) treatment, factors that are clinically relevant to hormone replacement in perimenopausal women, on social behavior and expression of genes in brain regions that regulate these behaviors. Female rats were ovariectomized (OVX) at 1year of age, roughly equivalent to middle-age in women, and given E2 or vehicle for different durations (3 or 6months) and timing (immediately or after a 3-month delay) relative to OVX. Social and ultrasonic vocalization (USV) behaviors were assessed at the 3 and 6month timepoints, and the rats' brains were then used for gene expression profiling in hypothalamus (supraoptic nucleus, paraventricular nucleus), bed nucleus of the stria terminalis, medial amygdala, and prefrontal cortex using a 48-gene qPCR platform...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29080671/sex-differences-and-estradiol-involvement-in-hyperalgesia-and-allodynia-in-an-experimental-model-of-fibromyalgia
#10
Alberto Hernandez-Leon, Yarim Elideth De la Luz-Cuellar, Vinicio Granados-Soto, María Eva González-Trujano, Alonso Fernández-Guasti
Fibromyalgia (FM) is a musculoskeletal chronic pain syndrome. Its prevalence in women is higher than in men possibly by hormonal factors given that symptoms are aggravated during sex hormone-related events, such as the premenstrual period, pregnancy, postpartum or menopause. The aim of the present study was to investigate whether hyperalgesia and allodynia, in reserpine-induced experimental FM, depend on sex, estrous cycle, ovariectomy and replacement with 17β-estradiol. To fulfill this objective, we compared males, intact females with known estrous cycle phases and ovariectomized (OVX) rats treated with 17β-estradiol...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29080670/central-ghrelin-receptor-stimulation-modulates-sex-motivation-in-male-rats-in-a-site-dependent-manner
#11
Lindsay Hyland, Stephanie Rosenbaum, Alexander Edwards, Daniel Palacios, M Dean Graham, James G Pfaus, Barbara Woodside, Alfonso Abizaid
Ghrelin, a hormone produced primarily by the stomach, has been associated with motivational processes that include reward-seeking behaviors. In male laboratory mice, elevation of ghrelin levels enhances some aspects of sexual motivation and behavior, whereas in other experiments with male mice, rats, and other species, ghrelin treatment or food deprivation decreases sexual motivation and/or behavior. The present tested the hypothesis that stimulation of ghrelin receptors in different brain regions have opposite effects on male sexual motivation and behavior...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29079442/effects-of-systemic-estradiol-on-fear-extinction-in-female-rats-are-dependent-on-interactions-between-dose-estrous-phase-and-endogenous-estradiol-levels
#12
Bronwyn M Graham, Elliot Scott
Administering estradiol to females during periods of low endogenous estradiol enhances their ability to extinguish fear, the laboratory basis of exposure therapy for anxiety disorders. It has therefore been proposed that estradiol could be a useful adjunct to enhance exposure therapy outcomes. The present study aimed to clarify the boundary conditions under which estradiol could be used for this purpose, by assessing whether the impact of estradiol, administered systemically prior to extinction training, differs depending on dose and estrous phase in adult female rats...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29127025/effect-of-yolk-corticosterone-on-begging-in-the-yellow-legged-gull
#13
Cristina Daniela Possenti, Marco Parolini, Andrea Romano, Manuela Caprioli, Diego Rubolini, Nicola Saino
Behavioral lateralization is widespread across vertebrates. The development of lateralization is affected by both genetic and environmental factors. In birds, maternal substances in the egg can affect offspring lateralization via activational and/or organizational effects. Corticosterone affects the development of brain asymmetry, suggesting that variation in yolk corticosterone concentration may also influence post-natal behavioral lateralization, a hypothesis that has never been tested so far. In the yellow-legged gull (Larus michahellis), we increased yolk corticosterone concentration within physiological limits and analyzed the direction of lateralization of hatchlings in reverting from supine to prone position ('RTP' response) and in pecking at dummy parental bills to solicit food provisioning ('begging' response)...
November 7, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29030109/social-information-changes-stress-hormone-receptor-expression-in-the-songbird-brain
#14
Jamie M Cornelius, Gillian Perreau, Valerie R Bishop, Jesse S Krause, Rachael Smith, Thomas P Hahn, Simone L Meddle
Social information is used by many vertebrate taxa to inform decision-making, including resource-mediated movements, yet the mechanisms whereby social information is integrated physiologically to affect such decisions remain unknown. Social information is known to influence the physiological response to food reduction in captive songbirds. Red crossbills (Loxia curvirostra) that were food reduced for several days showed significant elevations in circulating corticosterone (a "stress" hormone often responsive to food limitation) only if their neighbors were similarly food restricted...
November 7, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29117505/changes-in-behavior-and-brain-immediate-early-gene-expression-in-male-threespined-sticklebacks-as-they-become-fathers
#15
Molly Kent, Alison M Bell
Motherhood is a period of intense behavioral and brain activity. However, we know less about the neural and molecular mechanisms associated with the demands of fatherhood. Here, we report the results of two experiments designed to track changes in behavior and brain activation associated with fatherhood in male threespined stickleback fish (Gasterosteus aculeatus), a species in which fathers are the sole providers of parental care. In experiment 1, we tested whether males' behavioral reactions to different social stimuli depends on parental status, i...
November 5, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29104009/a-plurality-of-molecular-targets-the-receptor-ecosystem-for-bisphenol-a-bpa
#16
REVIEW
Harry MacKay, Alfonso Abizaid
Bisphenol-A (BPA) is a well-known endocrine disrupting compound (EDC), capable of affecting the normal function and development of the reproductive system, brain, adipose tissue, and more. In spite of these diverse and well characterized effects, there is often comparatively little known about the molecular mechanisms which bring them about. BPA has traditionally been regarded as a primarily estrogenic EDC, and this perspective is often what guides research into the effects of BPA. However, emerging data from in-vitro and in-silico models show that BPA binds with a significant number of hormone receptors, including a number of nuclear and membrane-bound estrogen receptors, androgen receptors, as well as the thyroid hormone receptor, glucocorticoid receptor, and PPARγ...
November 3, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29092774/trkb-is-necessary-for-male-copulatory-behavior-in-the-syrian-hamster-mesocricetus-auratus
#17
Joe C Brague, Clifford Zinn, Dean Granot, Cameron T Feathers, Jennifer M Swann
The magnocellular medial preoptic nucleus (MPN mag), a subdivision of the medial preoptic area (MPOA), plays a critical role in the regulation of copulation in the Syrian hamster; in part by mediating the effects of gonadal steroids. For example, ablation of the MPN mag eliminates mating and testosterone placed in the MPN mag restores mating in castrated males. Testosterone treatment enhances synaptic density and dendritic spines in the MPN mag. Thus, copulatory behaviors are correlated with increases in synaptic morphology in the MPN mag...
October 29, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29107582/perinatal-exposure-to-endocrine-disrupting-compounds-and-the-control-of-feeding-behavior-an-overview
#18
REVIEW
Sabrina N Walley, Troy A Roepke
Endocrine disrupting compounds (EDCs) are ubiquitous environmental contaminants that can interact with steroid and nuclear receptors or alter hormone production. Many studies have reported that perinatal exposure to EDC including bisphenol A, PCB, dioxins, and DDT disrupt energy balance, body weight, adiposity, or glucose homeostasis in rodent offspring. However, little information exists on the effects of perinatal EDC exposure on the control of feeding behaviors and meal pattern (size, frequency, duration), which may contribute to their obesogenic properties...
October 28, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29107581/developmental-estrogen-exposures-and-disruptions-to-maternal-behavior-and-brain-effects-of-ethinyl-estradiol-a-common-positive-control
#19
Mary C Catanese, Laura N Vandenberg
Due of its structural similarity to the endogenous estrogen 17β-estradiol (E2), the synthetic estrogen 17α-ethinyl estradiol (EE2) is widely used to study the effects of estrogenic substances on sensitive organs at multiple stages of development. Here, we investigated the effects of EE2 on maternal behavior and the maternal brain in females exposed during gestation and the perinatal period. We assessed several components of maternal behavior including nesting behavior and pup retrieval; characterized the expression of estrogen receptor (ER)α in the medial preoptic area (MPOA), a brain region critical for the display of maternal behavior; and measured expression of tyrosine hydroxylase, a marker for dopaminergic cells, in the ventral tegmental area (VTA), a brain region important in maternal motivation...
October 28, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29054797/the-effects-of-ovariectomy-and-lifelong-high-fat-diet-consumption-on-body-weight-appetite-and-lifespan-in-female-rats
#20
Takeshi Iwasa, Toshiya Matsuzaki, Kiyohito Yano, Minoru Irahara
In females, ovarian hormones play pivotal roles in metabolic, appetite, and body weight regulation. In addition, it has been reported that ovarian hormones also affect longevity in some species. Recently, it was found that the consumption of a high-fat diet aggravates ovariectomy-associated metabolic dysregulation in female rodents. The aim of this study was to investigate the hypothesis that long-term high-fat diet consumption and ovariectomy interact to worsen body weight regulation and longevity in female rats...
October 24, 2017: Hormones and Behavior
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