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Oxytocin dosing

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https://www.readbyqxmd.com/read/28526519/oxytocin-administration-during-spontaneous-labor-guidelines-for-clinical-practice-chapter-4-oxytocin-efficiency-according-to-implementation-in-insufficient-spontaneous-labor
#1
Bénédicte Coulm, Véronique Tessier
AIM: To describe the optimal procedures for administering oxytocin in cases of insufficient uterine contractility during spontaneous labor and the maternal and fetal monitoring to accompany it. METHODS: Systematic review of the literature by consultation of the Medline, Micromedex, and Cochrane databases, and international guidelines. RESULTS: Oxytocin must be administered only in hospital settings and monitored according to a written departmental protocol...
May 16, 2017: J Gynecol Obstet Hum Reprod
https://www.readbyqxmd.com/read/28526450/the-association-of-single-nucleotide-polymorphisms-in-the-oxytocin-receptor-and-g-protein-coupled-receptor-kinase-6-grk6-genes-with-oxytocin-dosing-requirements-and-labor-outcomes
#2
Chad A Grotegut, Emily Ngan, Melanie E Garrett, Marie Lynn Miranda, Allison E Ashley-Koch, Geeta K Swamy
BACKGROUND: Oxytocin is a potent uterotonic agent that is widely used for induction and augmentation of labor. Oxytocin has a narrow therapeutic index and the optimal dosing for any individual woman varies widely. OBJECTIVE: The objective of this study was to determine if genetic variation in the oxytocin receptor (OXTR) or in the gene encoding G protein-coupled receptor kinase 6 (GRK6), which regulates desensitization of the OXTR, could explain variation in oxytocin dosing and labor outcomes among women being induced near term...
May 16, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28512038/involvement-of-the-oxytocin-system-in-the-nucleus-accumbens-in-the-regulation-of-juvenile-social-novelty-seeking-behavior
#3
Caroline J W Smith, Jazmin N Mogavero, Maxwell T Tulimieri, Alexa H Veenema
Exploration of novel environments, stimuli, and conspecifics is highly adaptive during the juvenile period, as individuals transition from immaturity to adulthood. We recently showed that juvenile rats prefer to interact with a novel individual over a familiar cage mate. However, the neural mechanisms underlying this juvenile social novelty-seeking behavior remain largely unknown. One potential candidate is the oxytocin (OXT) system, given its involvement in various motivated social behaviors. Here, we show that administration of the specific oxytocin receptor antagonist desGly-NH2,d(CH2)5-[Tyr(Me)(2),Thr(4)]OVT reduces social novelty seeking-behavior in juvenile male rats when injected into the nucleus accumbens (10ng/0...
May 13, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28485846/oxytocin-and-migraine-headache
#4
REVIEW
Alexander Tzabazis, Shashi Kori, Jordan Mechanic, James Miller, Conrado Pascual, Neil Manering, Dean Carson, Michael Klukinov, Egilius Spierings, Daniel Jacobs, Jason Cuellar, William H Frey, Leah Hanson, Martin Angst, David C Yeomans
This article reviews material presented at the 2016 Scottsdale Headache Symposium. This presentation provided scientific results and rationale for the use of intranasal oxytocin for the treatment of migraine headache. Results from preclinical experiments are reviewed, including in vitro experiments demonstrating that trigeminal ganglia neurons possess oxytocin receptors and are inhibited by oxytocin. Furthermore, most of these same neurons contain CGRP, the release of which is inhibited by oxytocin. Results are also presented which demonstrate that nasal oxytocin inhibits responses of trigeminal nucleus caudalis neurons to noxious stimulation using either noxious facial shock or nitroglycerin infusion...
May 2017: Headache
https://www.readbyqxmd.com/read/28479288/a-randomized-trial-of-foley-bulb-for-labor-induction-in-premature-rupture-of-membranes-in-nulliparas-flip
#5
Jennifer Mh Amorosa, Joanne Stone, Stephanie H Factor, Whitney Booker, Meredith Newland, Angela Bianco
BACKGROUND: In premature rupture of membranes (PROM) the risk of chorioamnionitis increases with increasing duration of membrane rupture. Decreasing the time from PROM to delivery is associated with lower rates of maternal infection. The American College of Obstetricians and Gynecologists suggests that all women with PROM who do not have a contraindication to vaginal delivery have their labor induced instead of being expectantly managed. While the use of oxytocin for labor induction has been demonstrated to decrease the time to delivery when compared to expectant management, no studies have evaluated the effectiveness of cervical ripening using a Foley bulb to additionally decrease the time to delivery...
May 4, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28476692/oxytocin-administration-during-spontaneous-labor-guidelines-for-clinical-practice-chapter-7-epidural-analgesia-and-use-of-oxytocin-during-spontaneous-labor
#6
Catherine Fischer
OBJECTIVES: To evaluate the association between epidural analgesia and oxytocin use during spontaneous labor. MATERIAL AND METHODS: A systematic review of the literature via the Medline and Cochrane databases. The key words used for this analysis included oxytocin and epidural. The articles selected related only to spontaneous labor. RESULTS: Based on data reflecting at least in part older practices of epidural analgesia that used high quantities of local anesthetic, studies of the effects of epidural analgesia suggest that those epidural methods had little effect on the first stage of labor but prolonged the second stage and increased the rate of instrumental but not cesarean delivery...
May 2, 2017: J Gynecol Obstet Hum Reprod
https://www.readbyqxmd.com/read/28476691/oxytocin-administration-during-spontaneous-labor-guidelines-for-clinical-practice-guidelines-short-text
#7
C Dupont, M Carayol, C Le Ray, C Deneux-Tharaux, D Riethmuller
No abstract text is available yet for this article.
May 2, 2017: J Gynecol Obstet Hum Reprod
https://www.readbyqxmd.com/read/28473291/oxytocin-administration-during-spontaneous-labor-guidelines-for-clinical-practice-chapter-5-maternal-risk-and-adverse-effects-of-using-oxytocin-augmentation-during-spontaneous-labor
#8
https://www.readbyqxmd.com/read/28472396/chronic-activation-of-hypothalamic-oxytocin-neurons-improves-cardiac-function-during-left-ventricular-hypertrophy-induced-heart-failure
#9
Kara Garrott, Jhansi Dyavanapalli, Edmund Cauley, Mary Kate Dwyer, Sarah Kuzmiak-Glancy, Xin Wang, David Mendelowitz, Matthew Kay
AIMS: A distinctive hallmark of heart failure (HF) is autonomic imbalance, consisting of increased sympathetic activity and decreased parasympathetic tone. Recent work suggests that activation of hypothalamic oxytocin (OXT) neurons could improve autonomic balance during HF. We hypothesized that a novel method of chronic selective activation of hypothalamic OXT neurons will improve cardiac function and reduce inflammation and fibrosis in a rat model of HF. METHODS AND RESULTS: Two groups of male Sprague-Dawley rats underwent trans-ascending aortic constriction (TAC) to induce left ventricular (LV) hypertrophy that progresses to HF...
May 2, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28470238/the-application-of-perfluoroheteroaromatic-reagents-in-the-preparation-of-modified-peptide-systems
#10
Diana Gimenez, Caitlin A Mooney, Anica Dose, Graham Sandford, Christopher R Coxon, Steven L Cobb
The perfluoroheteroaromatic reagent pentafluoropyridine has proved to be a highly reactive electrophile, undergoing SNAr arylation reactions in the presence of a range of nucleophilic peptide side chains (i.e. cysteine, tyrosine, serine and lysine) under mild conditions. Moreover, we have shown how one-step peptide-modification using perfluoroheteroaromatics can deliver enhanced proteolytic stability in pharmaceutically-relevant peptides such as oxytocin.
May 16, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28467893/meta-analysis-of-the-effects-of-intranasal-oxytocin-on-interpretation-and-expression-of-emotions
#11
REVIEW
Jenni Leppanen, Kah Wee Ng, Kate Tchanturia, Janet Treasure
Accurate interpretation and appropriate expression of emotions are key aspects of social-cognition. Several mental disorders are characterised by transdiagnostic difficulties in these areas and, recently, there has been increasing interest in exploring the effects of oxytocin on social-emotional functioning. This review consists of 33 studies. Fifteen of the studies included people with autism spectrum disorder, schizophrenia, borderline personality disorder, frontotemporal dementia, anorexia nervosa, bulimia nervosa, post-traumatic stress disorder, depression, and opioid and alcohol dependence...
April 30, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28460894/intravenous-administration-of-oxytocin-in-rats-acutely-decreases-deprivation-induced-chow-intake-but-it-fails-to-affect-consumption-of-palatable-solutions
#12
Anica Klockars, Chloe Brunton, Lu Li, Allen S Levine, Pawel K Olszewski
Despite its limited ability to cross the blood-brain barrier, peripherally administered oxytocin (OT) acutely decreases food intake, most likely via the brainstem and hypothalamic mechanisms. Studies performed to date have focused mainly on the effects of subcutaneous or intraperitoneal OT on the consumption of only solid calorie-dense diets (either standard or high-fat), whereas it is unknown whether, similarly to central OT, peripherally administered peptide reduces intake of calorie-dilute and non-caloric palatable solutions...
April 28, 2017: Peptides
https://www.readbyqxmd.com/read/28456503/novel-oxytocin-receptor-variants-in-laboring-women-requiring-high-doses-of-oxytocin
#13
Erin L Reinl, Zane A Goodwin, Nandini Raghuraman, Grace Y Lee, Erin Y Jo, Beakal M Gezahegn, Meghan K Pillai, Alison G Cahill, Cristina De Guzman Strong, Sarah K England
BACKGROUND: Although oxytocin commonly is used to augment or induce labor, it is difficult to predict its effectiveness because oxytocin dose requirements vary significantly among women. One possibility is that women requiring high or low doses of oxytocin have variations in the oxytocin receptor gene. OBJECTIVES: To identify oxytocin receptor gene variants in laboring women with low and high oxytocin dosage requirements. STUDY DESIGN: Term, nulliparous women requiring oxytocin doses of ≤4 mU/min (low-dose requiring, n = 83) or ≥20 mU/min (high-dose requiring, n = 104) for labor augmentation or induction provided consent to a postpartum blood draw as a source of genomic DNA...
April 26, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28447622/modern-clinical-research-on-lsd
#14
REVIEW
Matthias E Liechti
All modern clinical studies using the classic hallucinogen lysergic acid diethylamide (LSD) in healthy subjects or patients in the last 25 years are reviewed herein. There were five recent studies in healthy participants and one in patients. In a controlled setting, LSD acutely induced bliss, audiovisual synesthesia, altered meaning of perceptions, derealization, depersonalization, and mystical experiences. These subjective effects of LSD were mediated by the 5-HT2A receptor. LSD increased feelings of closeness to others, openness, trust, and suggestibility...
April 27, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28432255/osmotic-activation-of-a-ca-2-dependent-phospholipase-c-pathway-that-regulates-%C3%A2-n-trpv1-mediated-currents-in-rat-supraoptic-neurons
#15
Vimal Bansal, Thomas E Fisher
The magnocellular neurosecretory cells (MNCs) of the hypothalamus regulate body fluid balance by releasing the hormones vasopressin (VP) and oxytocin (OT) in an osmolality-dependent manner. Elevations of external osmolality increase MNC firing and hormone release. MNC osmosensitivity is largely due to activation of a mechanosensitive non-selective cation current that responds to osmotically-evoked changes in MNC volume and is mediated by an N-terminal variant of the TRPV1 channel (∆N TRPV1). We report a novel mechanism by which increases in osmolality may modulate ∆N TRPV1-mediated currents and thus influence MNC electrical behaviour...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28418399/restoring-effects-of-oxytocin-on-the-attentional-preference-for-faces-in-autism
#16
M Kanat, I Spenthof, A Riedel, L T van Elst, M Heinrichs, G Domes
Reduced attentional preference for faces and symptoms of social anxiety are common in autism spectrum disorders (ASDs). The neuropeptide oxytocin triggers anxiolytic functions and enhances eye gaze, facial emotion recognition and neural correlates of face processing in ASD. Here we investigated whether a single dose of oxytocin increases attention to faces in ASD. As a secondary question, we explored the influence of social anxiety on these effects. We tested for oxytocin's effects on attention to neutral faces as compared to houses in a sample of 29 autistic individuals and 30 control participants using a dot-probe paradigm with two different presentation times (100 or 500 ms)...
April 18, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28416501/protocol-for-a-placebo-controlled-within-participants-crossover-trial-evaluating-the-efficacy-of-intranasal-oxytocin-to-improve-pain-and-function-among-women-with-chronic-pelvic-musculoskeletal-pain
#17
Joshua A Rash, Kirsti Toivonen, Magali Robert, Maryam Nasr-Esfahani, John F Jarrell, Tavis S Campbell
INTRODUCTION: This protocol presents the rationale and design for a trial evaluating the efficacy of intranasal oxytocin in improving pain and function among women with chronic pelvic musculoskeletal pain. Oxytocin is a neuropeptide traditionally recognised for involvement in labour, delivery and lactation. Novel evidence suggests that oxytocin decreases pain sensitivity in humans. While oxytocin administration has been reported to lower pain sensitivity among patients experiencing chronic back pain, headache, constipation and colon pain, no research has evaluated the association between intranasal oxytocin and chronic pelvic musculoskeletal pain...
April 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/28402515/oxytocin-differentially-modulates-pavlovian-cue-and-context-fear-acquisition
#18
Juliana Cavalli, Michaela Ruttorf, Mario Rosero Pahi, Francesca Zidda, Herta Flor, Frauke Nees
Background: Fear acquisition and extinction have been demonstrated as core mechanisms for the development and maintenance of mental disorders, with different contributions of processing cues versus contexts. The hypothalamic peptide oxytocin (OXT) may have a prominent role in this context, as it has been shown to affect fear learning. However, investigations have focused on cue conditioning, and fear extinction. Its differential role for cue and context fear acquisition is still not known...
April 11, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28389633/leonurine-attenuates-hyperalgesia-in-mice-with-induced-adenomyosis
#19
Jichan Nie, Xishi Liu
BACKGROUND Adenomyosis, defined as the invasion of endometrial glands and stroma into the myometrium, is a common gynecological disorder. In the present study we report on the effect of leonurine on ICR mice with adenomyosis induced by neonatal tamoxifen. MATERIAL AND METHODS After being treated with tamoxifen for 4, 8, and 12 weeks, we assessed body weight and pain modulation in mice in hotplate tests. The mice were divided into 5 groups: a low-dose leonurine treatment group, a high-dose leonurine treatment group, a valproic acid (VPA) treatment group, a vehicle only treatment group, and a blank control group...
April 8, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28384337/duration-of-labor-and-the-risk-of-severe-postpartum-hemorrhage-a-case-control-study
#20
Lill Trine Nyfløt, Babill Stray-Pedersen, Lisa Forsén, Siri Vangen
OBJECTIVE: Our main objective was to investigate the association between duration of active labor and severe postpartum hemorrhage. We examined the effect of the total duration of active labor, the effect of each stage of active labor, and the gradient effect of duration of labor on severe postpartum hemorrhage. METHODS: A case-control study was generated from a source population of all women admitted for delivery at Oslo University Hospital and Drammen Hospital in Buskerud municipality during the time period January 1, 2008 to December 31, 2011...
2017: PloS One
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