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Oxytocin

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https://www.readbyqxmd.com/read/29333632/binding-of-cu-and-cu2-with-peptides-peptides-oxytocin-arg8-vasopressin-bradykinin-angiotensin-i-substance-p-somatostatin-and-neurotensin
#1
Thankan Jayasekharan, Shyam L Gupta, Vikas Dhiman
The intrinsic binding ability of seven natural peptides (oxytocin, arg8 -vasopressin, bradykinin, angiotensin-I, substance-P, somatostatin, and neurotensin) with copper in two different oxidation states (CuI/II ) derived from different Cu+/2+ precursor sources have been investigated for their charge dependent binding characteristics. The peptide-CuI/II complexes, [M - (n-1)H + nCuI ] and [M - (2n-1)H + nCuII ] are prepared/generated by the reaction of peptides with CuI solution/Cu-target and CuSO4 solution, and are analyzed using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS)...
January 15, 2018: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29330007/lost-connections-oxytocin-and-the-neural-physiological-and-behavioral-consequences-of-disrupted-relationships
#2
REVIEW
Tobias T Pohl, Larry J Young, Oliver J Bosch
In humans and rodent animal models, the brain oxytocin system is paramount for facilitating social bonds, from the formation and consequences of early-life parent-infant bonds to adult pair bond relationships. In social species, oxytocin also mediates the positive effects of healthy social bonds on the partners' well-being. However, new evidence suggests that the negative consequences of early neglect or partner loss may be mediated by disruptions in the oxytocin system as well. With a focus on oxytocin and its receptor, we review studies from humans and animal models, i...
January 9, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29326182/variations-in-childbirth-interventions-in-high-income-countries-protocol-for-a-multinational-cross-sectional-study
#3
Anna Seijmonsbergen-Schermers, Ank de Jonge, Thomas van den Akker, Katrien Beeckman, Annick Bogaerts, Monalisa Barros, Patricia Janssen, Lorena Binfa, Eva Rydahl, Lucy Frith, Mechthild Gross, Berglind Hálfdánsdóttir, Deirdre Daly, Jean Calleja-Agius, Patricia Gillen, Anne Britt Vika Nilsen, Eugene Declercq
INTRODUCTION: There are growing concerns about the increase in rates of commonly used childbirth interventions. When indicated, childbirth interventions are crucial for preventing maternal and perinatal morbidity and mortality, but their routine use in healthy women and children leads to avoidable maternal and neonatal harm. Establishing ideal rates of interventions can be challenging. This study aims to describe the range of variations in the use of commonly used childbirth interventions in high-income countries around the world, and in outcomes in nulliparous and multiparous women...
January 10, 2018: BMJ Open
https://www.readbyqxmd.com/read/29324852/real-life-helping-behaviours-in-north-america-a-genome-wide-association-approach
#4
Georg Primes, Martin Fieder
In humans, prosocial behaviour is essential for social functioning. Twin studies suggest this distinct human trait to be partly hardwired. In the last decade research on the genetics of prosocial behaviour focused on neurotransmitters and neuropeptides, such as oxytocin, dopamine, and their respective pathways. Recent trends towards large scale medical studies targeting the genetic basis of complex diseases such as Alzheimer's disease and schizophrenia pave the way for new directions also in behavioural genetics...
2018: PloS One
https://www.readbyqxmd.com/read/29324397/serum-levels-of-cortisol-dehydroepiandrosterone-and-oxytocin-in-children-with-attention-deficit-hyperactivity-disorder-combined-presentation-with-and-without-comorbid-conduct-disorder
#5
Ümit Işık, Ayhan Bilgiç, Aysun Toker, Ibrahim Kılınç
The present study aimed to investigate serum cortisol, dehydroepiandrosterone (DHEA), and oxytocin levels of children with attention-deficit/hyperactivity disorder (ADHD) combined presentation and those diagnosed with ADHD combined presentation and coexisting conduct disorder. A total of 74 drug-naive children with ADHD combined presentation alone, 32 children with ADHD combined presentation + conduct disorder, and 42 healthy controls were included. The severities of ADHD and conduct disorder symptoms were assessed via parent- and teacher-rated questionnaires...
January 2, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29323764/integrative-neuro-humoral-regulation-of-oxytocin-neuron-activity-in-pregnancy-and-lactation
#6
REVIEW
Rachael A Augustine, Alexander J Seymour, Rebecca E Campbell, David R Grattan, Colin H Brown
Oxytocin is required for normal birth and lactation. Oxytocin is synthesised by hypothalamic supraoptic and paraventricular nuclei neurons and is released into the circulation from the posterior pituitary gland. Under basal conditions, circulating oxytocin levels are relatively constant but during birth and lactation, pulsatile oxytocin release triggers rhythmic contraction of the uterus during birth and milk ejection during suckling. Oxytocin levels are principally determined by the pattern of action potential firing that is, in turn, determined by the interplay between the intrinsic properties of the oxytocin neurons, regulation of their excitability by surrounding glia as well as by synaptic drive from their afferent inputs...
January 11, 2018: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29317612/gamma-oscillatory-activity-in-vitro-a-model-system-to-assess-pathophysiological-mechanisms-of-comorbidity-between-autism-and-epilepsy
#7
D Subramanian, E Pralong, R T Daniel, A G Chacko, R Stoop, K S Babu
Autism spectrum disorder (ASD) and temporal lobe epilepsy exhibit remarkable comorbidity, but for reasons not clearly understood. To reveal a common pathophysiological mechanism, we here describe and characterize an in vitro epileptiform activity in the rat hippocampus that exhibits common features with in vivo activity in rodent ASD models. We discovered the development of this activity in the CA1 region of horizontal slices after prolonged interictal-like epileptiform activity in the CA3 region that was provoked by incubation in high potassium artificial cerebrospinal fluid...
January 10, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29310164/re-men-s-sexual-response-to-female-partner-s-intranasal-oxytocin-administration-for-hypoactive-sexual-desire-disorder-an-open-prospective-cohort-study
#8
https://www.readbyqxmd.com/read/29309996/biomarker-discovery-for-disease-status-and-symptom-severity-in-children-with-autism
#9
Ozge Oztan, Lisa P Jackson, Robin A Libove, Raena D Sumiyoshi, Jennifer M Phillips, Joseph P Garner, Antonio Y Hardan, Karen J Parker
Autism spectrum disorder (ASD) is characterized by social impairments and repetitive behaviors, and affects 1 in 68 US children. Despite ASD's societal impact, its disease mechanisms remain poorly understood. Recent preclinical ASD biomarker discovery research has implicated the neuropeptides oxytocin (OXT) and arginine vasopressin (AVP), and their receptors, OXTR and AVPR1A, in animal models. Efforts to translate these findings to individuals with ASD have typically involved evaluating single neuropeptide measures as biomarkers of ASD and/or behavioral functioning...
December 28, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29309759/kinetics-of-oxytocin-and-deaminooxytocin-displacement-from-the-oxtr-receptor-compartment-in-rat-uterus-ex-vivo
#10
Vladimir Pliska, Guido Jutz
The oil immersion method suggested earlier by Kalsner and Nickerson for analysing actions of sympathomimetic drugs in smooth muscle tissues was applied to isometric preparations of rat myometrium stimulated by oxytocin and deaminooxytocin. An exchange of the aqueous medium by mineral oil allows monitoring the displacement of the peptides from their receptor compartment in absence of free diffusion transport between tissue and organ medium. Exponential analysis of the data from the uterotonic decay phase allows several inferences to be drawn: 1) Transport rate constants (roughly equal for the two peptides) are higher than rate constants of (irreversible) elimination from the receptor compartment...
January 5, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29308359/evaluation-of-risk-factors-for-exchange-range-hyperbilirubinemia-and-neurotoxicity-in-neonates-from-hilly-terrain-of-india
#11
Deeksha A Singla, Seema Sharma, Milap Sharma, Sanjeev Chaudhary
Background and Aim: Neonatal hyperbilirubinemia continues to be the most common cause of hospital admissions and readmissions in the neonatal population worldwide and this pattern continues despite attempts to identify neonates at risk of pathological hyperbilirubinemia. Therefore, this study aimed to study the risk factors for severe hyperbilirubinemia in neonates. Materials and Methods: An observational prospective study was undertaken for 1 year in neonates with hyperbilirubinemia requiring double volume exchange transfusion in neonatology unit of a tertiary rural health care hospital...
October 2017: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/29306965/differential-activation-of-arginine-vasopressin-receptor-subtypes-in-the-amygdaloid-modulation-of-anxiety-in-the-rat-by-arginine-vasopressin
#12
Oscar René Hernández-Pérez, Minerva Crespo-Ramírez, Yordanka Cuza-Ferrer, José Anias-Calderón, Limei Zhang, Gabriel Roldan-Roldan, Raúl Aguilar-Roblero, Dasiel O Borroto-Escuela, Kjell Fuxe, Miguel Perez de la Mora
RATIONALE: The amygdala plays a paramount role in the modulation of anxiety and numerous studies have shown that arginine vasopressin (AVP) elicits anxiogenic effects following either its systemic or septal administration. OBJECTIVES: The aim of this paper was to study the involvement of vasopressinergic neurotransmission in the amygdaloid modulation of unconditioned anxiety and to ascertain whether or not AVP receptor subtypes may have a differential role in this modulation...
January 7, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29306689/genetic-variants-in-oxytocin-receptor-gene-oxtr-and-childhood-physical-abuse-collaborate-to-modify-the-risk-of-aggression-in-chinese-adolescents
#13
Yanmei Zhang, Chunxia Wu, Hongjuan Chang, Qiuge Yan, Linguo Wu, Shanshan Yuan, Jingjing Xiang, Wen Hao, Yizhen Yu
BACKGROUND: Accumulating evidence suggests that genetic and environmental factors may influence aggression susceptibility. However, the etiology of aggressive behavior remains unknown. Compared to some extensively studied candidate genes of aggression, very little is known about the OXTR gene. The objective of this study was to determine whether OXTR genetic variants were associated with aggression risk and whether these polymorphisms showed interactive effects with childhood maltreatment on aggression in Chinese adolescents...
December 21, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29306053/cd38-is-required-for-dendritic-organisation-in-visual-cortex-and-hippocampus
#14
Thom P Nelissen, Rosemary A Bamford, Shiro Tochitani, Kamuran Akkus, Aurimas Kudzinskas, Kenichiro Yokoi, Hiroshi Okamoto, Yasuhiko Yamamoto, J Peter H Burbach, Hideo Matsuzaki, Asami Oguro-Ando
Morphological screening of mouse brains with known behavioural deficits can give great insight into the relationship between brain regions and their behaviour. Oxytocin- and CD38-deficient mice have previously been shown to have behavioural phenotypes, such as restrictions in social memory, social interactions, and maternal behaviour. CD38 is reported as an autism spectrum disorder (ASD) candidate gene and these behavioural phenotypes may be linked to ASD. To address whether these behavioural phenotypes relate to brain pathology and neuronal morphology, here we investigate the morphological changes in the CD38-deficient mice brains, with focus on the pathology and neuronal morphology of the cortex and hippocampus, using Nissl staining, immunohistochemistry, and Golgi staining...
January 3, 2018: Neuroscience
https://www.readbyqxmd.com/read/29305879/reproductive-stage-and-sex-dependant-effects-of-neurohypophyseal-nonapeptides-on-gonadotropin-subunit-mrna-expression-in-the-catfish-heteropneustes-fossilis-an-in-vitro-study
#15
A Acharjee, R Chaube, K P Joy
In the present study, in vitroeffects of synthetic vasotocin (VT), isotocin (4Ser, 8Ile- oxytocin; ITb) and the recently cloned IT gene paralog product (8Val-Isotocin, ITa) were studied onthe expression of pituitary gonadotropin (GtH) subunit mRNA levels. In male pituitaries of early (preparatory phase) and late (prespawning phase) recrudescing catfish, Heteropneustes fossilis, VT (10 nM, 100 nM and 1000 nM) stimulated fshβ expression dose-dependently. But in females, the dose-dependent effect was found only in the preparatory phase...
January 3, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29304421/oxytocin-biases-men-to-be-more-or-less-tolerant-of-others-dislike-dependent-upon-their-relationship-status
#16
Weihua Zhao, Xiaole Ma, Jiao Le, Aiqing Ling, Fei Xin, Juan Kou, Yingying Zhang, Ruixue Luo, Benjamin Becker, Keith M Kendrick
The experience of being liked or disliked by others strongly influences our liking for and willingness to socialize with them. The neuropeptide oxytocin is involved in social bonding and can modify social preferences for others dependent upon their characteristics. However, it is unclear whether oxytocin affects individuals' reactions to social evaluations made by others (i.e., being liked or disliked) and if this is influenced by already having a secure partner bond (i.e., being single or in a relationship)...
December 22, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29304391/incidence-and-risk-factors-of-third-and-fourth-degree-perineal-tears-in-a-single-italian-scenario
#17
Matteo Frigerio, Stefano Manodoro, Davide P Bernasconi, Debora Verri, Rodolfo Milani, Patrizia Vergani
OBJECTIVE: This study aimed to evaluate III and IV degree tears rates and related risk factors in a single Italian centre. The secondary goal was to build a predictive model based on identified risk factors. STUDY DESIGN: This was a retrospective cohort study. All vaginal deliveries from 2011 to 2015 in a single Italian University Hospital were analysed. Univariate analysis was applied to evaluate the overall association between each factor and severe tear. Multivariate logistic regression was used to build a predictive model for the absolute risk of severe tear...
December 26, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29302631/oxytocin-monolayer-based-impedimetric-biosensor-for-zinc-and-copper-ions
#18
Kiran Kumar Tadi, Israel Alshanski, Evgeniy Mervinetsky, Gerard Marx, Panayiota Petrou, Karussis M Dimitrios, Chaim Gilon, Mattan Hurevich, Shlomo Yitzchaik
Zinc and copper are essential metal ions for numerous biological processes. Their levels are tightly maintained in all body organs. Impairment of the Zn2+ to Cu2+ ratio in serum was found to correlate with many disease states, including immunological and inflammatory disorders. Oxytocin (OT) is a neuropeptide, and its activity is modulated by zinc and copper ion binding. Harnessing the intrinsic properties of OT is one of the attractive ways to develop valuable metal ion sensors. Here, we report for the first time an OT-based metal ion sensor prepared by immobilizing the neuropeptide onto a glassy carbon electrode...
December 31, 2017: ACS Omega
https://www.readbyqxmd.com/read/29302262/does-anaesthesia-in-mothers-during-delivery-affect-bilirubin-levels-in-their-neonates
#19
Zeinab A El-Kabbany, Nadin N Toaima, Tamer N Toaima, Mona Y Gamal El-Din
Purpose: This study aimed to assess whether different anesthetic techniques and oxytocin use applied during delivery affect transcutaneous bilirubin levels during the first 24 hours in neonates. Methods: A total of 1,044 neonates delivered by either caesarian section (C/S) or normal vaginal delivery (NVD) were included in the study. They were classified into 5 groups as follows: group 1: born by C/S using general anesthesia, group 2: C/S using spinal anaesthesia, group 3: C/S using general anesthesia after failed spinal block, group 4: by NVD without anesthesia, and group 5: oxytocin-induced vaginal delivery without anesthesia...
December 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29300770/oxytocin-is-lower-in-african-american-men-with-diabetes-and-associates-with-psycho-social-and-metabolic-health-factors
#20
Yuval Eisenberg, Lara R Dugas, Arfana Akbar, Bharathi Reddivari, Brian T Layden, Elena Barengolts
OBJECTIVE: Recently, it has been suggested that oxytocin (OT) has a role in metabolism and neuropsychiatry health and disease, and therefore, it may represent a potential therapeutic target. The current study aimed to investigate relationships between OT and glycemic status along with psycho-social and behavioral factors. DESIGN AND METHODS: A total of 92 obese or overweight, African American, male subjects were enrolled in the study. Biometric and biochemical data were collected including oral glucose tolerance testing and urinary OT (measured by ELISA)...
2018: PloS One
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