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https://www.readbyqxmd.com/read/29627593/quantification-of-receptor-activation-by-oxytocin-and-vasopressin-in-endocytosis-coupled-bioluminescence-reduction-assay-using-nanokaz
#1
Isao Kii, Shino Hirahara-Owada, Masataka Yamaguchi, Takashi Niwa, Yuka Koike, Rie Sonamoto, Harumi Ito, Kayo Takahashi, Chihiro Yokoyama, Takuya Hayashi, Takamitsu Hosoya, Yasuyoshi Watanabe
Oxytocin (OXT) and arginine vasopressin (AVP) are structurally similar neuropeptide hormones that function as neurotransmitters in the brain, and have opposite key roles in social behaviors. These peptides bind to their G protein-coupled receptors (OXTR and AVPRs), inducing calcium ion-dependent signaling pathways and endocytosis of these receptors. Because selective agonists and antagonists for these receptors have been developed as therapeutic and diagnostic agents for diseases such as psychiatric disorders, facile methods are in demand for the evaluation of selectivity between these receptors...
April 5, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29514604/efficacy-of-serum-procalcitonin-to-predict-spontaneous-preterm-birth-in-women-with-threatened-preterm-labour-a-prospective-observational-study
#2
Guillaume Ducarme, François Desroys du Roure, Aurélie Le Thuaut, Joséphine Grange, Mathilde Vital, Jérôme Dimet
BACKGROUND: A hypothesis of preterm parturition is that the pathogenesis of spontaneous preterm birth (sPTB) may be associated with an inflammatory process. Based on this theory, we have hypothesized that an inflammatory biomarker, procalcitonin (PCT), may be a good predictive marker of sPTB at the admission for threatened preterm labour (TPL). The present study was aimed to investigate the association between serum PCT and sPTB in women with TPL and to evaluate whether PCT levels may predict sPTB in women with TPL within 7 or 14 days...
March 7, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29443077/contractility-measurements-of-human-uterine-smooth-muscle-to-aid-drug-development
#3
Sarah Arrowsmith, Peter Keov, Markus Muttenthaler, Christian W Gruber
Discovery and characterization of novel pharmaceutical compounds or biochemical probes rely on robust and physiologically relevant assay systems. We describe methods to measure ex vivo myometrium contractility. This assay can be used to investigate factors and molecules involved in the modulation of myometrial contraction and to determine their excitatory or inhibitory actions, and hence their therapeutic potential in vivo. Biopsies are obtained from women undergoing cesarean section delivery with informed consent...
January 26, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29421836/drugs-in-pregnancy-and-lactation-medications-used-in-swiss-obstetrics
#4
Larissa Schenkel, Ana Paula Simões-Wüst, Irene Hösli, Ursula von Mandach
BACKGROUND: In order to improve the safety for drugs in pregnancy and lactation, data on the clinical practice must be collected and validated. METHODS: Data on the medications routinely used were requested from the university hospitals for obstetrics and the non-university perinatal centres in Switzerland and recommendations and guidelines of scientific societies for the various fields of application were sought. RESULTS: Part I: For during pregnancy and the peripartal period respectively, 69 and 21 different active constituents of medications were identified from at least 4 centres...
February 8, 2018: Zeitschrift Für Geburtshilfe und Neonatologie
https://www.readbyqxmd.com/read/29356563/oxytocin-receptor-antagonist-atosiban-in-the-threat-of-preterm-birth-does-it-have-any-effect-on-breastfeeding-in-the-term-newborn
#5
Lucía López Gómez, Miguel A Marín Gabriel, Begoña Encinas, Juan J de la Cruz Troca, Belén Rodríguez Marrodán
AIM: Oxytocin is a hormone involved in the mechanism of breastfeeding, uterine contractions, and social relationships. Atosiban (competitive oxytocin antagonist) is one of the most commonly used tocolytics for the threat of preterm labor in Europe. The aim of this study is to determinate if the administration of atosiban has any influence in the type of feeding in the term newborn at discharge. The secondary objective is to verify its effectiveness for the prevention of preterm delivery and in the possibility of applying treatment to complete lung maturation...
March 2018: Breastfeeding Medicine: the Official Journal of the Academy of Breastfeeding Medicine
https://www.readbyqxmd.com/read/29274352/oxytocin-is-present-in-islets-and-plays-a-role-in-beta-cell-function-and-survival
#6
Shruti Mohan, Dawood Khan, R Charlotte Moffett, Nigel Irwin, Peter R Flatt
Oxytocin is associated mainly with modulating reproductive function. However, studies suggest that oxytocin also plays a role in endocrine pancreatic function. In the present study, islet expression of oxytocin and its related receptor was confirmed in mouse islets as well as cultured rodent and human beta-cells. Oxytocin significantly stimulated glucose-induced insulin secretion from isolated mouse islets. Similar insulinotropic actions were also observed in rodent BRIN BD11 and human 1.1B4 beta-cells. Positive effects of oxytocin on insulin secretion were almost fully annulled by the oxytocin receptor antagonist, atosiban...
February 2018: Peptides
https://www.readbyqxmd.com/read/29184844/effect-of-different-doses-of-oxytocin-on-cardiac-electrophysiology-and-arrhythmias-induced-by-ischemia
#7
Fariba Houshmand, Mahdieh Faghihi, Alireza Imani, Soleiman Kheiri
The onset of acute myocardial ischemia (MI) is accompanied by a rapid increase in electrical instability and often fatal ventricular arrhythmias. This study investigated that whether oxytocin (OT) can modulate ischemia-induced arrhythmias and considered relationships between the severity of arrhythmia and the electrocardiogram parameters during ischemia. OT (0.0001-1 μg) was administrated intraperitoneally 30 min before ischemia. To examine receptor involved, a selective OT-receptor antagonist, atosiban (ATO), was infused 10 min before OT...
October 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/29162434/oxytocin-inhibited-stress-induced-visceral-hypersensitivity-enteric-glial-cells-activation-and-release-of-proinflammatory-cytokines-in-maternal-separated-rats
#8
Shaoxian Xu, Bin Qin, Ameng Shi, Jing Zhao, Xiaoyan Guo, Lei Dong
Visceral hypersensitivity (VH) is a significant contributor to irritable bowel syndrome (IBS). Oxytocin (OT) possesses analgesic effects on the central nervous system (CNS) and attenuates microglial activation, however, little is known about its peripheral effects and involvement in VH of IBS. Reactive enteric glial cells (EGCs) contributes to abnormal motility in gastrointestinal (GI) diseases. The aim of this study was to evaluate the peripheral use of OT to maintain VH and activation of EGCs through involvement of the Toll-like receptor (TLR) 4/MyD88/NF-κB signaling...
January 5, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29143998/oxytocin-mediates-the-beneficial-effects-of-the-exercise-training-on-breast-cancer
#9
Ali Mohammad Alizadeh, Zahra Heydari, Mostafa Rahimi, Behzad Bazgir, Hossein Shirvani, Sadaf Alipour, Yassaman Heidarian, Solmaz Khalighfard, Amin Isanejad
What is the central question of this study? We hypothesized that potential anti-tumour effects of exercise training might be mediated by oxytocin and explored the underlying mechanisms in a mouse model of breast cancer. What is the main finding and its importance? Interval exercise training, by inducing oxytocin secretion, may reduce the activity of the PI3K/Akt and ERK pathways, and consequently, results in a smaller tumour volume in a mouse model of breast cancer. Exercise training can affect the growth of breast tumours...
February 1, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29116677/inhibitory-effects-of-oxytocin-and-oxytocin-receptor-antagonist-atosiban-on-the-activities-of-carbonic-anhydrase-and-acetylcholinesterase-enzymes-in-the-liver-and-kidney-tissues-of-rats
#10
Umit M Kocyigit, Ahmet Şevki Taşkıran, Parham Taslimi, Ahmet Yokuş, Yusuf Temel, İlhami Gulçin
The aim of this study was to investigate the effects of oxytocin (OT), atosiban, which is an OT receptor antagonist, and OT-atosiban chemicals injected to rats on the activities of carbonic anhydrase (CA) and acetylcholinesterase (AChE) enzymes in liver and kidney tissues of rats. For this purpose, four different groups, each consisting of six rats (n = 6), were formed (control group, OT administered group, atosiban administered group, and both OT and atosiban administered group). The rats were necropsied 60 min after intraperitoneal injection of chemicals into the rats...
November 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28985964/the-hemoglobin-derived-peptide-lvv-hemorphin-7-evokes-behavioral-effects-mediated-by-oxytocin-receptors
#11
Kellen Rosa da Cruz, Larissa Córdova Turones, Gabriel Camargo-Silva, Karina Pereira Gomes, Michelle Mendanha Mendonça, Pablinny Galdino, Christielly Rodrigues-Silva, Robson Augusto Souza Santos, Elson Alves Costa, Paulo Cesar Ghedini, Danielle Ianzer, Carlos Henrique Xavier
LVV-hemorphin-7 (LVV-h7) is bioactive peptide resulting from degradation of hemoglobin β-globin chain. LVV-h7 is a specific agonist of angiotensin IV receptor. This receptor belongs to the class of insulin-regulated aminopeptidases (IRAP), which displays oxytocinase activity. Herein, our aims were to assess whether: i) LVV-h7 modifies centrally organized behavior and cardiovascular responses to stress and ii) mechanisms underlying LVV-h7 effects involve activation of oxytocin (OT) receptors, probably as result of reduction of IRAP proteolytic activity upon OT...
September 28, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28813702/tocolysis-for-in-utero-surgery-atosiban-performs-distinctly-better-than-magnesium-sulfate
#12
Nicole Ochsenbein-Kölble, Franziska Krähenmann, Margret Hüsler, Martin Meuli, Ueli Moehrlen, Lucca Mazzone, Peter Biro, Roland Zimmermann
INTRODUCTION: To compare tocolysis with magnesium sulfate versus atosiban regarding the occurrence of short-term preterm labor and maternal side effects during and after open fetal myelomeningocele (MMC) repair. MATERIAL AND METHODS: A prospective nonrandomized cohort study was performed including 30 fetal MMC cases. The first 15 cases (group 1) received magnesium sulfate according to the MOMS protocol. In the following 15 cases (group 2), magnesium sulfate was substituted by atosiban...
August 17, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28774871/enteric-serotonin-and-oxytocin-endogenous-regulation-of-severity-in-a-murine-model-of-necrotizing-enterocolitis
#13
Kara Gross Margolis, Jennifer Vittorio, Maria Talavera, Karen Gluck, Zhishan Li, Alina Iuga, Korey Stevanovic, Virginia Saurman, Narek Israelyan, Martha G Welch, Michael D Gershon
Necrotizing enterocolitis (NEC), a gastrointestinal inflammatory disease of unknown etiology that may also affect the liver, causes a great deal of morbidity and mortality in premature infants. We tested the hypothesis that signaling molecules, which are endogenous to the bowel, regulate the severity of intestinal and hepatic damage in an established murine NEC model. Specifically, we postulated that mucosal serotonin (5-HT), which is proinflammatory, would exacerbate experimental NEC and that oxytocin (OT), which is present in enteric neurons and is anti-inflammatory, would oppose it...
November 1, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28707771/effect-of-vaginal-progesterone-in-tocolytic-therapy-during-preterm-labor-in-twin-pregnancies-secondary-analysis-of-a-placebo-controlled-randomized-trial
#14
Wagner R Hernandez, Rossana P V Francisco, Roberto E Bittar, Ursula T Gomez, Marcelo Zugaib, Maria L Brizot
AIM: Our aim was to investigate the effect of the prophylactic use of vaginal progesterone on the latency period from the initiation of tocolytic therapy to delivery in twin pregnancies with preterm labor. METHODS: This study was a secondary analysis of a randomized, double-blind, placebo-controlled trial of twin pregnancies in mothers who were exposed to a 200 mg vaginal progesterone ovule or a placebo ovule daily from 18 to 34 weeks gestation. Patients who were administered tocolysis with Atosiban because of preterm labor were included...
July 14, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28695395/a-meta-analysis-of-atosiban-supplementation-among-patients-undergoing-assisted-reproduction
#15
Jie Li, Yang Chen, Anran Wang, Haiying Zhang
OBJECTIVES: Evidence for the efficacy of atosiban in improving pregnancy outcomes among patients undergoing assisted reproductive technology (ART) remains inconsistent. METHODS: The PubMed, EMBASE, and CNKI databases were searched using keywords such as 'atosiban', 'infertility', and 'ART'. Studies that explored the efficacy of atosiban in the field of ART for patients with embryo transfer (ET) were included if they evaluated pregnancy outcomes. Combing using subgroups and sensitivity analysis were conducted, and risk ratios (RRs), and 95% confidence intervals (CIs) were calculated...
October 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28587936/intra-hippocampal-microinjection-of-oxytocin-produced-antiepileptic-effect-on-the-pentylenetetrazol-induced-epilepsy-in-rats
#16
Amir Erfanparast, Esmaeal Tamaddonfard, Farzin Henareh-Chareh
BACKGROUND: In addition to its role as a circulating hormone, oxytocin can also act as a neurotransmitter and a neuromodulator within the brain. In this study, we investigated the intra-hippocampal effect of oxytocin on an experimental seizure model induced by pentylenetetrazole (PTZ) in rats. We also used atosiban (oxytocin antagonist), diazepam and flumazenil (gamma-aminobutyric acid or GABA-benzodiazepine receptor agonist and antagonist, respectively) to clarify the involved mechanism...
March 12, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28452086/the-effects-of-nifedipine-and-atosiban-on-perinatal-brain-injury-a-secondary-analysis-of-the-apostel-iii-trial
#17
T A J Nijman, M M Goedhart, C N Naaktgeboren, T R de Haan, D C Vijlbrief, B W Mol, M J N Benders, A Franx, M A Oudijk
OBJECTIVE: Brain injury in prematurely born neonates is strongly associated with poor neurodevelopmental outcome. The aim of our study is to evaluate if nifedipine reduces overall brain injury compared to atosiban in women with threatened preterm birth. METHODS: We performed a secondary analysis of the APOSTEL III-trial (Dutch Clinical Trial Registry, number NTR2947). This was a randomized clinical trial that allocated women with threatened preterm labor between 25-34 weeks of gestation to nifedipine or atosiban...
April 28, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28445928/regulation-of-angiogenic-behaviors-by-oxytocin-receptor-through-gli1-indcued-transcription-of-hif-1%C3%AE-in-human-umbilical-vein-endothelial-cells
#18
Ji Zhu, Huiyan Wang, Xiaoyan Zhang, Yin Xie
Angiogenesis is a dynamic hypoxia-stimulated process playing a key role in tissue growth and repair under various pathophysiological circumstances. Abnormal angiogenesis contributes to the pathogenesis of many human diseases. Oxytocin receptor is a classical G-protein-coupled receptor expressed on endothelial cells. The present study was aimed to investigate how oxytocin receptor regulated the angiogenic behaviors of human umbilical vein endothelial cells (HUVECs). We found that oxytocin at 0.1μM significantly increased cell proliferation, upregulated the mRNA and protein expression of CD31 and vWF (two important endothelial markers), and enhanced the tuber formation capacity in HUVECs...
June 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28444988/inhibitory-action-of-oxytocin-on-spontaneous-contraction-of-rat-distal-colon-by-nitrergic-mechanism-involvement-of-cyclic-gmp-and-apamin-sensitive-k-channels
#19
R Wang, M T Han, X L Lv, Y A Yu, S Q Chai, C M Qu, C Y Liu
AIM: The mechanisms underlying the inhibitory effects of oxytocin (OT) on colon tone are not totally understood. We explore the mechanisms of OT on spontaneous contractility in rat distal colon and identify the mediators involved in this action. METHODS: In rat distal colon strips, mechanical activity was analysed and the production of nitric oxide (NO) in tissue loaded with the fluorochrome DAF-FM was visualized by confocal microscopy. OT receptor (OTR) expression was determined by Western blotting and immunofluorescence...
November 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28422984/the-impact-of-atosiban-on-pregnancy-outcomes-in-women-undergoing-in-vitro-fertilization-embryo-transfer-a-meta-analysis
#20
Qian-Yi Huang, Min-Hua Rong, Ai-Hua Lan, Xiao-Miao Lin, Xing-Gu Lin, Rong-Quan He, Gang Chen, Mu-Jun Li
BACKGROUND: Atosiban is administered to women undergoing in vitro fertilization-embryo transfer (IVF-ET) to improve pregnancy outcomes. However, the results of this treatment were controversial. We conducted this meta-analysis to investigate whether atosiban improves pregnancy outcomes in the women undergoing in vitro fertilization (IVF). METHODS: Databases of PubMed, EMBASE, Web of Science, China BioMedicine, and Google Scholar were systematically searched. Meta-analyses were performed to investigate whether atosiban improves pregnancy outcomes in the women undergoing IVF...
2017: PloS One
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