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Rohit Menon, Thomas Grund, Iulia Zoicas, Ferdinand Althammer, Dominik Fiedler, Verena Biermeier, Oliver J Bosch, Yuichi Hiraoka, Katsuhiko Nishimori, Marina Eliava, Valery Grinevich, Inga D Neumann
Oxytocin (OXT)-mediated behavioral responses to social and stressful cues have extensively been studied in male rodents. Here, we investigated the capacity of brain OXT receptor (OXTR) signaling in the lateral septum (LS) to prevent social fear expression in female mice using the social-fear-conditioning paradigm. Utilizing the activated OXT system during lactation, we show that lactating mice did not express fear 24 hr after social fear conditioning. Supporting the role of OXTR signaling in the LS in attenuation of social fear, synthetic OXT infusion or overexpression of OXTR in the LS diminished social fear expression, whereas constitutive OXTR knockout severely impaired social fear extinction in virgin mice...
March 7, 2018: Current Biology: CB
L Tomova, M Heinrichs, C Lamm
Distinguishing self- from other-related representations plays an important role in social interactions. The neuropeptide oxytocin has been shown to modulate social behavior as well as underlying social cognitions and emotions. However, how exactly oxytocin modulates representations of self and other is still unclear. The present study therefore aimed to assess effects of oxytocin on self-other distinction on two different processing levels (i.e., lower-level imitation-inhibition and higher-level perspective taking) in a male sample (n = 56) by performing a double-blind, placebo-controlled oxytocin administration study...
March 14, 2018: International Journal of Psychophysiology
Morten Møller, Johannes R Busch, Christina Jacobsen, Sissel B Lundemose, Niels Lynnerup, Martin F Rath, Jytte Banner
The morphology and neurophysin expression of the magnocellular accessory neuroendocrine system located in the rostral human hypothalamus is investigated in a series of brains obtained at autopsy. The hypothalami were fixed in formalin and embedded in paraffin, or after cryoprotection, frozen for cryostat sectioning. Paraffin sections were either stained with Luxol Fast blue or immunoreacted for neurophysin I or neurophysin II, the precursor molecule for oxytocin and vasopressin. Further, 50-μm-thick serial cryostat sections were immunoreacted with the same antibodies...
March 16, 2018: Cell and Tissue Research
Ioana Miruna Balmus, Radu Lefter, Alin Ciobica, Iulia Antioch, Daniela Ababei, Romeo Dobrin
INTRODUCTION: Oxytocin (OT) is a well-known neuropeptides which together with vasopressin, melatonin, insulin and other hormones can alter both behavior and physiological or neuronal functions. This growing interest on OT roles is also based on the demonstrated beneficial effects as a stress reliever and a social bonding agent. The association between old age and OT was only vaguely studied. Little or few is known on the effect of the OT hormone on the old body. Hereby, we present our preliminary results in the research on behavioral changes regarding the intraperitoneal administration of OT in aged rats...
March 2018: Psychiatria Danubina
Mariana Fortunata Donadon, Rocio Martin-Santos, Flávia de Lima Osório
Studies have shown that traumatic experiences may affect hormonal systems mediated by the hypothalamic-pituitary-adrenal (HPA) axis and the oxytocinergic system. This effect is the result of long-term impairments in hypothalamic structures and negative feedback mechanisms within the HPA axis, structures that mediate the response to stress. This deregulation reduces the production and release of cortisol and oxytocin (OXT), which may alter stress responses and lead to increased vulnerability to impairments from stressful experiences...
2018: Frontiers in Pharmacology
Tiffany Field
The increasing prevalence of postnatal anxiety highlights the need for summarizing the recent research on this condition to inform screening and intervention efforts. This narrative review of the literature was derived from a search on PubMed and PsycINFO for papers published since 2010. The demographic risk factors for postnatal anxiety include being a young mother, having more education and being employed. Childbirth risk factors include being primiparous in one sample and multiparous in another, caesarean delivery, fear of the birth and of death during delivery, lack of control during labor, low self-confidence for the delivery and the delivery staff, and premature delivery...
March 12, 2018: Infant Behavior & Development
Asim Badar, Zarina Arif, Khursheed Alam
Carbamylation (or carbamoylation) is a non-enzymatic modification of biomolecules mediated by cyanate, a dissociation product of urea. Proteins are more sensitive to carbamylation. Two major sites of carbamylation reaction are: Nα -amino moiety of a protein N-terminus and the Nɛ -amino moiety of proteins' lysine residues. In kidney diseases, urea accumulates and the burden of carbamylation increases. This may lead to alteration in the structure and function of many important proteins relevant in maintenance of homeostasis...
March 15, 2018: IUBMB Life
Dilek Uysal, Hakan Cokmez, Cetin Aydin, Tolga Ciftpinar
Postpartum haemorrhage is the most important cause of maternal morbidity and mortality, especially when all conservative measures, including syntometrine oxytocin and Bakri balloons have failed to accomplish haemostasis and expeditious surgical procedures, such as uterine artery ligation and emergency peripartum hysterectomy (EPH) are required. This retrospective study analysed 31 cases of EPH performed between January 2007 and January 2016 in the Department of Gynecology and Obstetrics of Izmir Ataturk Teaching and Research Hospital...
March 2018: JPMA. the Journal of the Pakistan Medical Association
Akitsugu Konno, Miho Inoue-Murayama, Shinji Yabuta, Akiko Tonoike, Miho Nagasawa, Kazutaka Mogi, Takefumi Kikusui
Drug detection dogs can be trained to locate various prohibited drugs with targeted odors, and they play an important role in the interdiction of drug smuggling in human society. Recent studies provide the interesting hypothesis that the oxytocin system serves as a biological basis for co-evolution between dogs and humans. Here, we offer the new possibility that genetic variation of the canine oxytocin receptor (OXTR) gene may regulate the success of a dog's training to become a drug detection dog. A total of 340 Labrador Retriever dogs that were trained to be drug detection dogs in Japan were analyzed...
March 10, 2018: Journal of Heredity
Clodoaldo Tentes Côrtes, Sonia Maria Junqueira Vasconcellos de Oliveira, Rafael Cleison Silva Dos Santos, Adriana Amorim Francisco, Maria Luiza Gonzalez Riesco, Gilceria Tochika Shimoda
OBJECTIVE: to evaluate the impact of the implementation of evidence-based practices on normal delivery care. METHOD: quasi-experimental, before-and-after intervention study conducted in a public maternity hospital, Amapá. Forty-two professionals and 280 puerperal women were interviewed and data from 555 medical records were analyzed. The study was developed in three phases: baseline audit (phase 1), educational intervention (phase 2) and post-intervention audit (phase 3)...
March 8, 2018: Revista Latino-americana de Enfermagem
Oscar A Klockars, Anica Klockars, Allen S Levine, Pawel K Olszewski
Oxytocin (OT) at acting central nuclei decreases meal size and reduces intake of palatable sweet solutions. It remains largely unclear as to which brain sites mediate OT's effect on palatability versus energy or the combination of those aspects of consumption. Here, we expanded the search for sites that mediate anorexigenic properties of OT by focusing on two subdivisions of the amygdala, its central (CNA) and basolateral (BLA) nuclei. We injected OT directly into the BLA or CNA in rats and assessed intake of standard chow induced by energy deprivation and intake of sweet solutions in nondeprived animals...
March 13, 2018: Neuroreport
Lie Wang, Giri Kumar Chandaka, Robert C Foehring, Joseph C Callaway, William E Armstrong
Oxytocin (OT) neurons exhibit larger afterhyperpolarizations (AHPs) following spike trains during pregnancy and lactation, when these neurons burst and release more OT. Calcium-dependent AHPs mediated by SK channels show this plasticity, and are reduced when the channel is phosphorylated by casein kinase 2 (CK2), and increased when dephosphorylated by protein phosphatase 2A (PP2A), by altering Ca2+ sensitivity. We compared AHP currents in supraoptic OT neurons after CK2 inhibition with 4,5,6,7-tetrabromobenzotriazole (TBB), or PP1-PP2A inhibition with okadaic acid (OA) focusing on the peak current at 100 ms representing the SK-mediated, medium AHP (ImAHP )...
March 14, 2018: Journal of Neurophysiology
Sabrina Krause, Christina Boeck, Anja M Gumpp, Edit Rottler, Katharina Schury, Alexander Karabatsiakis, Anna Buchheim, Harald Gündel, Iris-Tatjana Kolassa, Christiane Waller
Background: Child maltreatment (CM) and attachment experiences are closely linked to alterations in the human oxytocin (OXT) system. However, human data about oxytocin receptor (OXTR) protein levels are lacking. Therefore, we investigated oxytocin receptor (OXTR) protein levels in circulating immune cells and related them to circulating levels of OXT in peripheral blood. We hypothesized reduced OXTR protein levels, associated with both, experiences of CM and an insecure attachment representation. Methods: OXTR protein expressions were analyzed by western blot analyses in peripheral blood mononuclear cells (PBMC) and plasma OXT levels were determined by radioimmunoassay (RIA) in 49 mothers...
2018: Frontiers in Psychology
Janelle A Skinner, Manohar L Garg, Christopher V Dayas, Sasha Fenton, Tracy L Burrows
Context: Oxytocin plays an important hormonal role in the regulation of feeding and energy intake. Objective: The aims of this review were to 1) determine the effects of dietary intake/behaviors on endogenous oxytocin and 2) examine the effect of exogenous oxytocin on dietary intake/behaviors. Data sources: Published studies up to December 2016 were identified through searches of 5 electronic databases. Data extraction: Eligible studies included those in adults that included a measure related to an individual's diet and a measure of oxytocin and the relationship between the 2 outcomes...
March 9, 2018: Nutrition Reviews
Dogukan Yildirim, Sefik Eser Ozyurek
OBJECTIVE: Postpartum hemorrhage is still the most significant cause of maternal mortality and morbidity worldwide. Our aim was to evaluate the effect of timing of oxytocin administration on postpartum hemorrhage incidence in parturients with low-risk for postpartum hemorrhage. STUDY DESIGN: A randomized controlled trial was completed on 343 women at a level-three care hospital. In group 1, 10 IU of oxytocin was injected intramuscularly within the first minute following the delivery of the fetus...
March 9, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Emma D Spikol, Eric Glasgow
Transcriptional control of oxytocinergic cell development influences social, sexual, and appetite related behaviors, and is implicated in disorders such as autism and Prader-Willi syndrome. Mediator 12 (Med12) is a transcriptional coactivator required for multiple facets of brain development including subsets of serotonergic and dopaminergic neurons. We surveyed hormone gene expression within the hypothalamo-pituitary axis of med12 mutant zebrafish embryos with a focus on oxytocin ( oxt ) expression. Some transcripts, such as oxt , vasopressin ( avp ) and corticotrophin releasing hormone ( crh ) are undetectable in the med12 mutant, while others are upregulated or downregulated to varying degrees...
March 12, 2018: Biology Open
Youl-Ri Kim, Jin-Sup Eom, Jennie Leppanen, Monica Leslie, Janet Treasure
BACKGROUND: Bulimia nervosa (BN) is characterized by binge eating and emotional dysregulation including increased negative affectivity (anger, anxiety). The aim of this study was to examine the effect of oxytocin on attentional processes towards anger in patients with BN. METHOD: The study design consisted of a double-blind, placebo-controlled within-subject crossover, single dose experiment. Sixty-four women (31 patients with BN and 33 healthy comparisons) completed self-reported measures to evaluate emotional difficulties and were administered a single dose of intranasal oxytocin (40IU) or placebo followed by a visual probe detection task to examine attentional orienting to angry or happy faces...
March 3, 2018: Psychoneuroendocrinology
Joshua I Rosenbloom, Methodius G Tuuli, Molly J Stout, Omar M Young, Candice L Woolfolk, Julia D López, George A Macones, Alison G Cahill
OBJECTIVE:  To determine the factors associated with severe maternal morbidity in a modern cohort of women laboring at term and to create a prediction model. STUDY DESIGN:  This is a retrospective cohort study of all term, laboring patients with live births at a single tertiary care center from 2004 to 2014. The primary outcome was composite maternal morbidity including organ failure, amniotic fluid embolism, anesthesia complications, sepsis, shock, thrombotic events, transfusion, or hysterectomy...
February 8, 2018: American Journal of Perinatology
Jon Cavanaugh, Aaryn Mustoe, Jeffrey A French
While separation from significant social partners produces a host of neurobiological and behavioral perturbations, including behavioral distress and increased glucocorticoid production, positive social interactions upon reunion are critical for the reestablishment of normative relationship dynamics and the attenuation of the biobehavioral stress response. The hormone oxytocin has critical and pervasive roles in reproductive and behavioral processes across the lifespan, and plays a particularly prominent role in social bonding...
March 11, 2018: American Journal of Primatology
Gökhan Aydogan, Andrea Jobst, Fabian Loy, Sandra Dehning, Peter Zill, Norbert Müller, Martin Kocher
Decision-making in groups is a remarkable and decisive element of human societies. Humans are able to organize themselves in groups, engage in collaborative decision-making processes and arrive at a binding agreement, even in the absence of unanimous consent. However, the transfer of decision-making autonomy requires a willingness to deliberately expose oneself to the decisions of others. A lack of trust in the abilities of others or of the underlying decision-making process, i.e. public trust, can lead to a breakdown of organizations in political or economic domains...
March 8, 2018: Hormones and Behavior
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