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Hormones and Behavior

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https://www.readbyqxmd.com/read/28624235/the-effect-of-oxytocin-on-human-directed-social-behaviour-in-dogs-canis-familiaris
#1
REVIEW
Anna Kis, Alin Ciobica, József Topál
The oxytocin system has recently received increasing attention due to its effect on complex human behaviours. In parallel to this, over the past couple of decades, the human-analogue social behaviour of dogs has been intensively studied. Combining these two lines of research (e.g. studying the relationship between dog social behaviour and the oxytocin system) is a promising new research area. The present paper reviews the existing literature on how oxytocin is related to different aspects of human-directed social behaviour in dogs...
June 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28622973/maternal-programming-of-sex-specific-responses-to-predator-odor-stress-in-adult-rats
#2
Sophie St-Cyr, Sameera Abuaish, Shathveekan Sivanathan, Patrick O McGowan
Prenatal stress mediated through the mother can lead to long-term adaptations in stress-related phenotypes in offspring. This study tested the long-lasting effect of prenatal exposure to predator odor, an ethologically relevant and psychogenic stressor, in the second half of pregnancy. As adults, the offspring of predator odor-exposed mothers showed increased anxiety-like behaviors in commonly used laboratory tasks assessing novelty-induced anxiety, increased defensive behavior in males and increased ACTH stress reactivity in females in response to predator odor...
June 13, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28606740/chronic-treatment-with-estradiol-restores-depressive-like-behaviors-in-female-wistar-rats-treated-neonatally-with-clomipramine
#3
Tania Molina Jiménez, Liliana Cadena Landa, Herlinda Bonilla Jaime
Neonatal administration of clomipramine (CMI) induces diverse behavioral and neurochemical alterations in adult male rats that resemble major depression disorder. However, the possible behavioral alterations in adult female rats subjected to neonatal treatment with clomipramine are unknown. Therefore, the aim of this study was to explore the effect of neonatal treatment with CMI on adult female rats in relation to locomotion and behavioral despair during the estrus cycle. Also evaluated was the effect of chronic treatment with E2 on these female CMI rats...
June 9, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28576645/effects-of-developmental-conditions-on-glucocorticoid-concentrations-in-adulthood-depend-on-sex-and-foraging-conditions
#4
Blanca Jimeno, Michael Briga, Simon Verhulst, Michaela Hau
Developmental conditions in early life frequently have long-term consequences on the adult phenotype, but the adult environment can modulate such long-term effects. Glucocorticoid hormones may be instrumental in mediating developmental effects, but the permanency of such endocrine changes is still debated. Here, we manipulated environmental conditions during development (small vs. large brood size, and hence sibling competition) and in adulthood (easy vs. hard foraging conditions) in a full factorial design in zebra finches, and studied effects on baseline (Bas-CORT) and stress-induced (SI-CORT) corticosterone in adulthood...
June 9, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28602941/hormonal-correlates-of-energetic-condition-in-mantled-howler-monkeys
#5
Pedro Américo D Dias, Alejandro Coyohua-Fuentes, Domingo Canales-Espinosa, Roberto Chavira-Ramírez, Ariadna Rangel-Negrín
Hormones have a key role in energy allocation, so their study allows understanding individual metabolic strategies. Because different hormones convey different information on the responses of individuals to energetic demands, a simultaneous analysis of variation in multiple hormones may offer a more reliable picture of metabolic strategies than single hormone assessments. In this study we focused on determining which factors were related to variation in fecal glucocorticoid and thyroid hormone metabolites in wild mantled howler monkeys (Alouatta palliata)...
June 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28576649/anti-androgenic-effects-of-bisphenol-a-on-spatial-memory-and-synaptic-plasticity-of-the-hippocampus-in-mice
#6
Zhaoqing Fang, Qingjie Zhu, Ting Gu, Xiuying Shen, Yang Yang, Yufeng Liang, Zigui Zhang, Xiaohong Xu
Bisphenol-A (BPA) is a common environmental endocrine disruptor. Our recent studies found that exposure to BPA in both adolescent and adulthood sex-specifically impaired spatial memory in male mice. In this study, 11-week-old gonadectomied (GDX) male mice daily received subcutaneous injections of testosterone propionate (TP, 0.5mg/kg), TP and BPA (0.4 and 4mg/kg), or vehicle for 45days. The results of Morris water maze task showed that exposure to BPA did not affect the spatial memory of GDX mice but impaired that of sham (4mg/kg/day) and TP-treated GDX mice (0...
June 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28576648/sex-differences-and-sex-hormones-in-anxiety-like-behavior-of-aging-rats
#7
Emese Domonkos, Veronika Borbélyová, Melinda Csongová, Martin Bosý, Mária Kačmárová, Daniela Ostatníková, Július Hodosy, Peter Celec
Sex differences in the prevalence of affective disorders might be attributable to different sex hormone milieu. The effects of short-term sex hormone deficiency on behavior, especially on anxiety have been studied in numerous animal experiments, mainly on young adult rats and mice. However, sex differences in aged animals and the effects of long-term hypogonadism are understudied. The aim of our study was to analyze sex differences in anxiety-like behavior in aged rats and to prove whether they can be attributed to endogenous sex hormone production in males...
June 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28576646/increase-in-hypothalamic-ampk-phosphorylation-induced-by-prolonged-exposure-to-lps-involves-ghrelin-and-cb1r-signaling
#8
Priscila M S Rivas, Fernanda M V Vechiato, Beatriz C Borges, Rodrigo Rorato, Jose Antunes-Rodrigues, Lucila L K Elias
Acute administration of lipopolysaccharide (LPS) from Gram-negative bacteria induces hypophagia. However, the repeated administration of LPS leads to desensitization of hypophagia, which is associated with increased hypothalamic p-AMPK expression. Because ghrelin and endocannabinoids modulate AMPK activity in the hypothalamus, we hypothesized that these neuromodulators play a role in the reversal of tolerance to hypophagia in rats under long-term exposure to LPS. Male Wistar rats were treated with single (1 LPS, 100μg/kg body weight, ip) or repeated injections of LPS over 6days (6 LPS)...
June 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28596135/administration-of-an-oxytocin-receptor-antagonist-attenuates-sexual-motivation-in-male-rats
#9
D S Blitzer, T E Wells, W R Hawley
In male rats, oxytocin impacts both sexual arousal and certain types of consummatory sexual behaviors. However, the role of oxytocin in the motivational aspects of sexual behavior has received limited attention. Given the role that oxytocin signaling plays in consummatory sexual behaviors it was hypothesized that pharmacological attenuation of oxytocin signaling would reduce sexual motivation in male rats. Sexually experienced Long-Evans male rats were administered either an oxytocin receptor antagonist (L368,899 hydrochloride; 1mg/kg) or vehicle control into the intraperitoneal cavity 40min prior to placement into the center chamber of a three-chambered arena designed to assess sexual motivation...
June 5, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28576650/steroid-metabolism-in-the-brain-from-bird-watching-to-molecular-biology-a-personal-journey
#10
REVIEW
Jacques Balthazart
Since Arnold Adolph Berthold established in 1849 the critical role of the testes in the activation of male sexual behavior, intensive research has identified many sophisticated neurochemical and molecular mechanisms mediating this action. Studies in Japanese quail demonstrated the critical role of testosterone action and of testosterone aromatization in the sexually dimorphic medial preoptic nucleus in the activation of male copulatory behavior. The development of an immunohistochemical visualization of brain aromatase in quail then allowed further refinement in the localization of the sites of neuroestrogens production...
June 4, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28571936/sex-differences-in-the-drinking-response-to-angiotensin-ii-angii-effect-of-body-weight
#11
Jessica Santollo, Ann-Marie Torregrossa, Derek Daniels
Sex differences in fluid intake stimulated by angiotensin II (AngII) have been reported, but the direction of the differences is inconsistent. To resolve these discrepancies, we measured water intake by male and female rats given AngII. Males drank more than females, but when intake was normalized to body weight, the sex difference was reversed. Weight-matched males and females, however, had no difference in intake. Using a linear mixed model analysis, we found that intake was influenced by weight, sex, and AngII dose...
June 3, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28478216/endocrine-differences-among-colour-morphs-in-a-lizard-with-alternative-behavioural-strategies
#12
Madeleine St Clair Yewers, Tim S Jessop, Devi Stuart-Fox
Alternative behavioural strategies of colour morphs are expected to associate with endocrine differences and to correspond to differences in physical performance (e.g. movement speed, bite force in lizards); yet the nature of correlated physiological and performance traits in colour polymorphic species varies widely. Colour morphs of male tawny dragon lizards Ctenophorus decresii have previously been found to differ in aggressive and anti-predator behaviours. We tested whether known behavioural differences correspond to differences in circulating baseline and post-capture stress levels of androgen and corticosterone, as well as bite force (an indicator of aggressive performance) and field body temperature...
June 1, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28558993/estradiol-modulates-the-anorexic-response-to-central-glucagon-like-peptide-1
#13
Calyn B Maske, Christine M Jackson, Sarah J Terrill, Lisa A Eckel, Diana L Williams
Estrogens suppress feeding in part by enhancing the response to satiation signals. Glucagon-like peptide 1 (GLP-1) acts on receptor populations both peripherally and centrally to affect food intake. We hypothesized that modulation of the central GLP-1 system is one of the mechanisms underlying the effects of estrogens on feeding. We assessed the anorexic effect of 0, 1, and 10μg doses of GLP-1 administered into the lateral ventricle of bilaterally ovariectomized (OVX) female rats on a cyclic regimen of either 2μg β-estradiol-3-benzoate (EB) or oil vehicle 30min prior to dark onset on the day following hormone treatment...
May 31, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28576647/testosterone-oxytocin-and-the-development-of-human-parental-care
#14
Ilanit Gordon, Maayan Pratt, Katharina Bergunde, Orna Zagoory-Sharon, Ruth Feldman
The steroid testosterone (T) and neuropeptide oxytocin (OT) have each been implicated in the development of parental care in humans and animals, yet very little research addressed the interaction between these hormones at the transition to parenthood in mothers and fathers. One hundred and sixty mothers and fathers (80 couples) were visited 1 and 6months after the birth of their first child, plasma OT and T were assayed at each time-point, and interactions between each parent and the infant were observed and micro-coded for two key parental behaviors; affectionate touch and parent-infant synchrony...
May 30, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28571937/thermal-modulation-of-anthropogenic-estrogen-exposure-on-a-freshwater-fish-at-two-life-stages
#15
J L Ward, M K Cox, H Schoenfuss
Human-mediated environmental change can induce changes in the expression of complex behaviors within individuals and alter the outcomes of interactions between individuals. Although the independent effects of numerous stressors on aquatic biota are well documented (e.g., exposure to environmental contaminants), fewer studies have examined how natural variation in the ambient environment modulates these effects. In this study, we exposed reproductively mature and larval fathead minnows (Pimephales promelas) to three environmentally relevant concentrations (14, 22, and 65ng/L) of a common environmental estrogen, estrone (E1), at four water temperatures (15, 18, 21, and 24°C) reflecting natural spring and summer variation...
May 29, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28558909/introduction-to-the-special-on-human-competition
#16
David A Edwards, Kathleen V Casto, Pranjal Mehta
No abstract text is available yet for this article.
May 27, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28545898/risk-averse-personalities-have-a-systemically-potentiated-neuroendocrine-stress-axis-a-multilevel-experiment-in-parus-major
#17
Alexander T Baugh, Rebecca A Senft, Marian Firke, Abigail Lauder, Julia Schroeder, Simone L Meddle, Kees van Oers, Michaela Hau
Hormonal pleiotropy-the simultaneous influence of a single hormone on multiple traits-has been hypothesized as an important mechanism underlying personality, and circulating glucocorticoids are central to this idea. A major gap in our understanding is the neural basis for this link. Here we examine the stability and structure of behavioral, endocrine and neuroendocrine traits in a population of songbirds (Parus major). Upon identifying stable and covarying behavioral and endocrine traits, we test the hypothesis that risk-averse personalities exhibit a neuroendocrine stress axis that is systemically potentiated-characterized by stronger glucocorticoid reactivity and weaker negative feedback...
May 26, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28527589/competition-related-testosterone-cortisol-and-perceived-personal-success-in-recreational-women-athletes
#18
Kathleen V Casto, Aileen Rivell, David A Edwards
Thirty-five women participating in one or more intramural flag-football games provided saliva samples before, immediately after, and 10min after competition and completed an after-competition questionnaire appraising their own performance during the game. As seen in other studies of elite athletes, these recreational athletes, on average, showed significant elevations in testosterone (T) and cortisol (C) across the competition period - the "competition effect". In winners and losers, T levels at all time points measured were positively related to athletes' appraisals of their own individual performance...
May 26, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28551168/corrigendum-to-effects-of-developmental-exposure-to-bisphenol-a-and-ethinyl-estradiol-on-spatial-navigational-learning-and-memory-in-painted-turtles-chrysemys-picta-horm-behav-85-2016-48-55
#19
Lindsey K Manshack, Caroline M Conard, Sarah A Johnson, Jorden M Alex, Sara J Bryan, Sharon L Deem, Dawn K Holliday, Mark R Ellersieck, Cheryl S Rosenfeld
No abstract text is available yet for this article.
May 25, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28526234/recommendations-for-the-study-of-women-in-hormones-and-competition-research
#20
Kathleen V Casto, Smrithi Prasad
No abstract text is available yet for this article.
May 23, 2017: Hormones and Behavior
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