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Uterine contraction

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https://www.readbyqxmd.com/read/29036279/strong-inhibition-of-neutrophil-sperm-interaction-in-cattle-by-selective-pi3-kinase-inhibitors
#1
Jiwon Hong, Bridget L Dicker, Shakeela N Jayasinghe, Francesca De Gregorio, Hong Tian, Dug Yeo Han, Keith R Hudson
The vast majority of sperm are lost from the female reproductive tract in hours following natural mating or artificial insemination in mammals. Multiple complex processes including uterine contractions, mucus barriers and phagocytosis of sperm by neutrophils have been reported to be involved in the sperm loss, although the contribution of each process is uncertain. If phagocytosis by neutrophils has a significant role in sperm loss, inhibition of neutrophil response to sperm could potentially reduce the dose of sperm required for artificial insemination...
October 4, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29033994/effect-of-dates-in-late-pregnancy-on-the-duration-of-labor-in-nulliparous-women
#2
Masoumeh Kordi, Fatemeh Aghaei Meybodi, Fatemeh Tara, Farzaneh Rashidi Fakari, Mohsen Nemati, Mohammadtaghi Shakeri
BACKGROUND: Long-term delivery is an important significant issue which is associated with mortality and fetal and maternal disorders. Based on the previous studies, consumption of dates affects uterine contractions and duration of delivery processes. This study aimed to study the effect of date consumption in late pregnancy on the duration of delivery processes in nulliparous women in 2013. MATERIALS AND METHODS: This randomized clinical trial was conducted among 182 nulliparous women 18-35 years who presented to OmAlBanin Hospital in Mashhad in 2013...
September 2017: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/29029054/prostaglandin-endoperoxide-synthase-1-ptgs1-mediates-the-timing-of-parturition-in-mice-despite-unhindered-uterine-contractility
#3
Jennifer L Herington, Christine O'Brien, Michael F Robuck, Wei Lei, Naoko Brown, J Chris Slaughter, Bibhash C Paria, Anita Mahadevan-Jansen, Jeff Reese
Cyclooxygenase (COX)-derived prostaglandins stimulate uterine contractions and prepare the cervix for parturition. Prior reports suggest Cox-1 (Ptgs1) knockout (KO) mice exhibit delayed parturition due to impaired luteolysis, yet the mechanism for late-onset delivery remains unclear. Here, we examined key factors for normal onset of parturition to determine whether any could account for the delayed parturition phenotype. Pregnant Cox-1KO mice did not display altered timing of embryo implantation or post-implantation growth...
September 29, 2017: Endocrinology
https://www.readbyqxmd.com/read/29022513/discrepancies-in-animal-models-of-preterm-birth
#4
Clarence R Manuel, Charles R Ashby, Sandra E Reznik
BACKGROUND: Preterm birth (PTB) is a multifactorial syndrome occurring before the 37th week of full-term pregnancy [1]. Babies delivered preterm experience short-term and long-term complications affecting multiple organ systems, and serious maternal complications include hemorrhage and infection. Each year, an estimated 15 million babies are born preterm, and complications from prematurity are the leading cause of death among children up to 5 years of age [2]. With another increase in PTB rates over the last several years, the United States continues to have the highest incidence of any industrialized country [3]...
October 12, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29022481/intra-and-interobserver-variability-of-intrapartum-transperineal-ultrasound-measurements-with-contraction-and-pushing
#5
José A Sainz, Ana Fernández-Palacín, Carlota Borrero, Adriana Aquise, Zenaida Ramos, José A García-Mejido
The aim of this study was to evaluate the inter- and intraobserver correlation of the different intrapartum-transperineal-ultrasound-parameters(ITU) (angle of progression (AoP), progression-distance (PD), head-direction (HD), midline-angle (MLA) and head-perineum distance (HPD)) with contraction and pushing. We evaluated 28 nulliparous women at full dilatation under epidural analgesia. We performed a transperineal ultrasound evaluating AoP and PD in the longitudinal plane, and MLA and HPD in the transverse plane...
October 12, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29020827/the-frequency-and-clinical-significance-of-intra-amniotic-inflammation-in-twin-pregnancies-with-preterm-labor-and-intact-membranes
#6
Kyung Joon Oh, Joon-Seok Hong, Roberto Romero, Bo Hyun Yoon
OBJECTIVE: The objective of this study is to evaluate the frequency and clinical significance of intra-amniotic inflammation in twin pregnancies with preterm labor and intact membranes. STUDY DESIGN: Amniotic fluid (AF) was retrieved from both sacs in 90 twin gestations with preterm labor and intact membranes (gestational age between 20 and 34 6/7 weeks). Preterm labor was defined as the presence of painful regular uterine contractions, with a frequency of at least 2 every 10 min, requiring hospitalization...
October 11, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29016497/discontinuing-oxytocin-infusion-in-the-active-phase-of-labor-a-systematic-review-and-meta-analysis
#7
Gabriele Saccone, Andrea Ciardulli, Jason K Baxter, Joanne N Quiñones, Liany C Diven, Bor Pinar, Giuseppe Maria Maruotti, Pasquale Martinelli, Vincenzo Berghella
OBJECTIVE: To evaluate the benefits and harms of discontinuation of oxytocin after the active phase of labor is reached. DATA SOURCES: Electronic databases (ie, MEDLINE, Scopus, ClinicalTrials.gov, EMBASE, ScienceDirect, the Cochrane Library at the CENTRAL Register of Controlled Trials, Scielo) were searched from their inception until April 2017. METHODS OF STUDY SELECTION: We included all randomized controlled trials comparing discontinuation (ie, intervention group) and continuation (ie, control group) of oxytocin infusion after the active phase of labor is reached, either after induction or augmentation of labor...
October 6, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28970803/high-frequency-stimulation-of-the-pelvic-nerve-inhibits-urinary-voiding-in-anesthetized-rats
#8
Jonathan J Crook, Thelma A Lovick
Urge Urinary Incontinence: "a sudden and uncontrollable desire to void which is impossible to defer" is extremely common and considered the most bothersome of lower urinary tract conditions. Current treatments rely on pharmacological, neuromodulatory, and neurotoxicological approaches to manage the disorder, by reducing the excitability of the bladder muscle. However, some patients remain refractory to treatment. An alternative approach would be to temporarily suppress activity of the micturition control circuitry at the time of need i...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28969013/low-dose-of-dexmedetomidine-as-an-adjuvant-to-bupivacaine-in-cesarean-surgery-provides-better-intraoperative-somato-visceral-sensory-block-characteristics-and-postoperative-analgesia
#9
Yong-Hong Bi, Xiao-Guang Cui, Rui-Qin Zhang, Chun-Yu Song, Yan-Zhuo Zhang
OBJECT: In this study, we aimed to investigate the beneficial effects of dexmedetomidine on somato-visceral sensory block characteristcs, postoperative analgesia and stress response of intrathecal bupivacaine administration in women undergoing cesarean section, and to find out which dose is better. METHODS: Sixty parturients with the American Society of Anesthesiologists (ASA) physical status I or II were anesthetized with intrathecal bupivacaine(10mg) alone or in combination with dexmedetomidine (3 μg and 5 μg) to undergo cesarean section...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28966136/lignocaine-augments-the-in-vitro-uterine-contractions-involving-no-guanylyl-cyclase-dependent-mechanisms
#10
Rashmi Raheja, Hemlata Gupta, Uma Pandey, Shripad B Deshpande
AIMS: Lignocaine is used during intrapartum and postpartum period but there are conflicting reports regarding the effect of lignocaine on uterine contractility. Therefore, this study was undertaken to delineate the effect of lignocaine on uterine contractility and the underlying mechanisms. MAIN METHODS: The in vitro contractions were recorded from the uterine segments obtained from adult rats (in estrous phase) and also from human myometrial tissue. Effect of lignocaine on spontaneous uterine contractions was recorded in the absence or presence of antagonists...
September 28, 2017: Life Sciences
https://www.readbyqxmd.com/read/28964870/hemostasis-and-uterine-contraction-promoting-effect-of-the-extract-from-drugs-in-the-zi-yin-tiao-jing-granule-a-traditional-chinese-compound-preparation
#11
Qing Tang, Sheng Yang, Jie Tong, Xu Li, Junjie Wu, Senhong Wang, Jifen Zhang, Yi Chen, Xiaoyu Xu
ETHNOPHARMACOLOGICAL RELEVANCE: Zi-Yin-Tiao-Jing granule (ZG) is a traditional Chinese medicine compound preparation for perimenopausal dysfunctional uterine bleeding. It is made from 9 Chinese crude drugs based on a modified traditional Chinese prescription recorded in Fu Qingzhu Nvke as Guben Zhibeng Tang. AIM OF THE STUDY: This study aimed to investigate the hemostasis and uterine contraction promoting effect of quality controlled ZG extract on animals as a preclinical study...
September 28, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28954603/matrix-metalloprotease-1-and-elastase-are-novel-uterotonic-agents-acting-through-protease-activated-receptor-1
#12
Scott W Walsh, William H Nugent, Anna V Solotskaya, Charles D Anderson, John R Grider, Jerome F Strauss
Matrix metalloproteinase-1 (MMP-1) and neutrophil elastase are proteolytic enzymes involved in tissue remodeling, but a role for them as uterotonic agents has not been considered. However, both these proteases activate protease-activated receptor 1 (PAR-1) that mediates thrombin-induced contractions. Matrix metalloproteinase-1 and elastase are products of neutrophils that infiltrate intrauterine tissues at the time of labor, so we tested the hypothesis that these proteases might be novel uterotonic agents acting via PAR-1...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28945005/differential-expression-of-myometrial-ap-1-proteins-during-gestation-and-labour
#13
Lubna Nadeem, Tali Farine, Anna Dorogin, Elzbieta Matysiak-Zablocki, Oksana Shynlova, Stephen Lye
Preterm labour (PTL) is a leading cause of perinatal mortality and postnatal morbidity. Contractions of the uterine muscle (myometrium) that determine the onset of labour depend on the expression of contraction-associated proteins (CAPs, i.e. connexin43) regulated by dimeric AP-1 transcription factors. Here, we examined subcellular (by immunoblotting) and tissue expression (by immunohistochemistry) of myometrial AP-1 proteins (cJUN, JUNB, JUND, cFOS, FOSB, FRA1, FRA2) throughout gestation and TL in different species (mouse, rat and human)...
September 25, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28943054/maintaining-and-repeating-tocolysis-a-reflection-on-evidence
#14
REVIEW
Isabelle Dehaene, Lina Bergman, Paula Turtiainen, Alexandra Ridout, Ben Willem Mol, Elsa Lorthe
It is inherent to human logic that both doctors and patients want to suppress uterine contractions when a woman presents in threatened preterm labor. Tocolysis is widely applied in women with threatened preterm labor with a variety of drugs. According to literature, tocolysis is indicated to enable transfer to a tertiary center as well as to ensure the administration of corticosteroids for fetal maturation. There is international discrepancy in the content and the implementation of guidelines on preterm labor...
September 21, 2017: Seminars in Perinatology
https://www.readbyqxmd.com/read/28939933/cellular-mechanics-of-primary-human-cervical-fibroblasts-influence-of-progesterone-and-a-pro-inflammatory-cytokine
#15
Vasudha Shukla, Victoria Barnhouse, William E Ackerman, Taryn L Summerfield, Heather M Powell, Jennifer L Leight, Douglas A Kniss, Samir N Ghadiali
The leading cause of neonatal mortality, pre-term birth, is often caused by pre-mature ripening/opening of the uterine cervix. Although cervical fibroblasts play an important role in modulating the cervix's extracellular matrix (ECM) and mechanical properties, it is not known how hormones, i.e., progesterone, and pro-inflammatory insults alter fibroblast mechanics, fibroblast-ECM interactions and the resulting changes in tissue mechanics. Here we investigate how progesterone and a pro-inflammatory cytokine, IL-1β, alter the biomechanical properties of human cervical fibroblasts and the fibroblast-ECM interactions that govern tissue-scale mechanics...
September 22, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28917726/ovulation-and-fertility-responses-for-sows-receiving-once-daily-boar-exposure-after-weaning-and-ovugel-%C3%A2-followed-by-a-single-fixed-time-post-cervical-artificial-insemination
#16
R R Ulguim, F P Bortolozzo, I Wentz, M Johnston, S K Webel, L Arend, R V Knox
Boar exposure is used to stimulate follicle development and estrus in sows after weaning and also to improve semen uptake and sperm transport with insemination. However, the need and value of boar exposure is uncertain when ovulation induction is used. These studies were designed to determine the effect of daily boar exposure after weaning when used with ovulation induction and fixed time post-cervical artificial insemination (PCAI). In experiment 1, sows were weaned into stalls and assigned to receive 3 min of daily fenceline boar exposure (BE, n = 7) or no boar exposure (NBE, n = 8)...
September 8, 2017: Theriogenology
https://www.readbyqxmd.com/read/28916261/differential-involvement-of-l-and-t-type-ca-2-channels-store-operated-calcium-channel-trpc-and-rho-kinase-signaling-pathway-s-in-pgf2%C3%AE-induced-contractions-in-myometrium-of-non-pregnant-and-pregnant-buffaloes-bubalus-bubalis
#17
Abhishek Sharma, Udayraj P Nakade, Pooja Jaitley, Vipin Sharma, Soumen Choudhury, Satish Kumar Garg
This study unravels the differential involvement of calcium signaling pathway(s) in PGF2α-induced contractions in myometrium of non-pregnant and pregnant buffaloes. Compared to the myometrium of pregnant animals, myometrium of non-pregnant buffaloes was more sensitive to PGF2α-induced contractile effect as manifested by the changes in mean integral tension (MIT) and tonicity. However, phasic contraction was significantly more in myometrium of pregnant animals. The uterotonic effect of PGF2α was dependent on extracellular Ca(2+) and its influx through nifedipine-sensitive L-type Ca(2+) channels both in non-pregnant and pregnant animals, but T-type Ca(2+) channels play an additional role during pregnancy...
September 12, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/28911210/a20-an-essential-component-of-the-ubiquitin-editing-protein-complex-is-a-negative-regulator-of-inflammation-in-human-myometrium-and-foetal-membranes
#18
Martha Lappas
STUDY QUESTION: Does A20 regulate mediators involved in the terminal processes of human labour in primary myometrial and amnion cells? SUMMARY ANSWER: A20 is a nuclear factor-kappa B (NF-κB) responsive gene that acts as a negative regulator of NF-κB-induced expression of pro-labour mediators. WHAT IS KNOWN ALREADY: Inflammation is commonly implicated in spontaneous preterm birth and the processes involved in rupture of foetal membranes and uterine contractions...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28898687/outcomes-of-mifepristone-usage-for-cervical-ripening-and-induction-of-labour-in-full-term-pregnancy-randomized-controlled-trial
#19
Oleg R Baev, Valentina P Rumyantseva, Oleg V Tysyachnyu, Olga A Kozlova, Gennady T Sukhikh
OBJECTIVE: The most commonly used approved indications for mifepristone in obstetrics include: termination of early pregnancy, cervical dilatation prior to abortion, labour induction in case of fetal death in utero. Fewer studies have been conducted on the effect of mifepristone on cervical ripening and induction of labour in term pregnancy with a live fetus. The aim of our study was to evaluate efficacy and safety of mifepristone use for cervical ripening and induction of labour versus expectant management in full-term pregnancy...
October 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28885783/uterine-balloon-tamponade-for-the-management-of-postpartum-haemorrhage-a-challenge-and-an-opportunity-for-better-evidence
#20
O A Viteri, B M Sibai
Postpartum haemorrhage (PPH) is a leading cause of maternal morbidity and mortality worldwide.The most common cause of PPH is uterine atony (80%) of cases, resulting from suboptimal uterine involution and poor contraction of spiral arteries following placental separation. The goal of therapy is timely intervention to prevent haemorrhagic hypovolemic shock, intravascular disseminated coagulopathy, reduced tissue perfusion, and metabolic acidosis. This article is protected by copyright. All rights reserved.
September 8, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
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