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Progesterone in preterm birth

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https://www.readbyqxmd.com/read/29741588/paternal-developmental-toxicant-exposure-is-associated-with-epigenetic-modulation-of-sperm-and-placental-pgr-and-igf2-in-a-mouse-model
#1
Tianbing Ding, Shilpa Mokshagundam, Paolo F Rinaudo, Kevin G Osteen, Kaylon L Bruner-Tran
Preterm birth (PTB), parturition prior to 37 weeks gestation, is the leading cause of neonatal mortality. The causes of spontaneous PTB are poorly understood; however, recent studies suggest this condition may arise as a consequence of the parental fetal environment. Specifically, we previously demonstrated that developmental exposure of male mice (F1 animals) to the environmental endocrine disruptor 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was associated with reduced sperm quantity/quality in adulthood and control female partners frequently delivered preterm...
May 7, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29738749/the-vaginal-eukaryotic-dna-virome-and-preterm-birth
#2
Kristine M Wylie, Todd N Wylie, Alison G Cahill, George A Macones, Methodius G Tuuli, Molly J Stout
BACKGROUND: Despite decades of attempts to link infectious agents to preterm birth, an exact causative microbe or community of microbes remains elusive. Culture-independent sequencing of vaginal bacterial communities demonstrates community characteristics are associated with preterm birth, although none are specific enough to apply clinically. Viruses are important components of the vaginal microbiome and have dynamic relationships with vaginal bacterial communities. We hypothesized that vaginal eukaryotic DNA viral communities (the "vaginal virome") either alone or in the context of bacterial communities are associated with preterm birth...
May 5, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29732148/effect-of-molecular-hydrogen-on-uterine-inflammation-during-preterm-labour
#3
Tomoko Nakano, Tomomi Kotani, Kenji Imai, Yukako Iitani, Takafumi Ushida, Hiroyuki Tsuda, Hua Li, Akira Iwase, Shinya Toyokuni, Fumitaka Kikkawa
Intrauterine inflammation causes preterm birth and is associated with complications in preterm neonates. Thus, strategies aimed at suppressing inflammation are expected to be effective for reducing the risk of preterm birth and associated complications. Our previous studies demonstrated that molecular hydrogen (H2 ), an anti-inflammatory agent, prevented inflammation-induced impairment in foetal brain and lung tissues in lipopolysaccharide (LPS)-induced rodent models. However, it remains unclear whether H2 is capable of inhibiting preterm labour...
May 2018: Biomedical Reports
https://www.readbyqxmd.com/read/29724668/rationale-for-current-and-future-progestin-based-therapies-to-prevent-preterm-birth
#4
REVIEW
Megan Weatherborn, Sam Mesiano
Preterm birth (PTB) is the leading cause of neonatal morbidity and mortality worldwide. The only medicinal therapy currently recommended to prevent PTB is prophylactic progestin therapy in the form of micronized progesterone (P4) administered daily via vaginal suppository from the 24th to the 34th week of gestation or 17α-hydroxyprogesterone caproate in oil administered weekly from the 16th to the 36th week of gestation via an intramuscular injection. These therapies decrease the risk of PTB in women with an elevated risk of PTB indicated by a history of PTB or by a short cervix measured by sonography at mid-gestation...
April 11, 2018: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29708071/research-progress-of-progesterone-preparations-a-mini-review
#5
Mingzhu Ye, Weisan Pan, Xinggang Yang, Xiaoyu Zhang
BACKGROUND: Progesterone is a sex steroid hormone. Since it was discovered, it had been widely used in the prevention of spontaneous preterm birth, hormone replacement therapy and other gynecological conditions. METHOD: We will review the progesterone preparations based on a comprehensive study of papers and patents from the traditionally preparations up through the very recent literatures. RESULTS: This review mainly concentrates on oral, vaginal and micro delivery systems, involving different ways to prepare progesterone preparations...
April 27, 2018: Current Drug Metabolism
https://www.readbyqxmd.com/read/29703554/the-biological-basis-and-prevention-of-preterm-birth
#6
REVIEW
Gian Carlo Di Renzo, Valentina Tosto, Irene Giardina
The time of birth is a critical determinant of perinatal and long-term outcomes. Preterm birth is still the first cause of infant mortality and morbidity; unfortunately, rates of preterm birth remain high in both high- and low-resource countries, ranging from 5% to 18%. Preterm parturition is a syndrome, which can be induced by various factors such as infection, cervical pathology, uterine overdistension, progesterone deficiency, vascular alterations (utero-placental ischemia, decidual hemorrhage), maternal and fetal stress, allograft reaction, allergic phenomena, and probably other several unknown factors...
February 16, 2018: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29699436/the-association-of-different-progesterone-preparations-with-preterm-birth-prevention
#7
Eyal Krispin, Eran Hadar, Rony Chen, Arnon Wiznitzer, Boris Kaplan
OBJECTIVE: We aimed to compare the efficacy of commonly available progesterone preparations for preterm birth prevention. METHODS: A retrospective cohort study of all women treated with progesterone to prevent preterm birth and delivered in a single university-affiliated tertiary medical-center. Four progesterone preparations were compared: vaginal Endometrin 100 mg twice daily, vaginal Crinone 8% gel 90 mg daily, vaginal Utrogestan 200 mg daily, and intramuscular 17α-hydroxyprogesterone caproate (17-OHPC) 250 mg weekly...
April 26, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29565684/progestogens-and-pregnancy-loss
#8
H J A Carp
Progestational agents are often prescribed to prevent pregnancy loss. Progestogens affect implantation, cytokine balance, natural killer cell activity, arachidonic acid release and myometrial contractility. Progestogens have therefore been used at all stages of pregnancy including luteal-phase support prior to pregnancy, threatened miscarriage, recurrent miscarriage, and to prevent preterm labor. In luteal support, a Cochrane review reported that progestogens were associated with a higher rate of live births or ongoing pregnancy in the progesterone group (odds ratio 1...
March 22, 2018: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/29557230/a-randomised-trial-to-compare-200-mg-micronised-progesterone-effervescent-vaginal-tablet-daily-with-250-mg-intramuscular-17-alpha-hydroxy-progesterone-caproate-weekly-for-prevention-of-recurrent-preterm-birth
#9
Shruti Shambhavi, Rashmi Bagga, Pallavi Bansal, Jasvinder Kalra, Praveen Kumar
For prevention of a recurrent preterm birth (PTB), intramuscular 17-α-hydroxy progesterone caproate (IM 17 OHPC) weekly is recommended. Vaginal progesterone is preferred for women at risk for PTB due to a short cervical length, but may be useful in women with a prior PTB. However, there is no consensus about the optimal vaginal formulation or its efficacy as compared to 17 OHPC to prevent recurrent PTB. We randomised 100 women with a singleton pregnancy between 16 and 24 weeks of gestation and ≥ one prior spontaneous PTB, of a singleton (>16 to <37 weeks of gestation) to receive the 200 mg vaginal progesterone effervescent tablet daily (Group A) or IM 17-OHPC, 250 mg weekly (Group B) till 37 weeks of gestation or delivery...
March 20, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29537316/routine-second-trimester-cervical-length-screening-in-low-risk-women-identified-women-at-risk-of-a-very-preterm-birth-but-did-not-reduce-the-preterm-birth-rate-a-randomised-study-from-india
#10
Siddhidatri Mishra, Rashmi Bagga, Jasvinder Kalra, Vanita Jain, Sourabh Dutta
Women (n = 300) at 'low risk' for a preterm birth (PTB), a singleton pregnancy and for a 16-24 week period of gestation (POG) were randomised to undergo cervical length (CL) measurement by transvaginal sonography (TVS) or not. The aim was to see if routine CL measurement and treatment of a short CL reduced the PTB rate. 'Low risk' was defined by an absence of a prior abortion or PTB of a singleton infant (>16 to <37 weeks) due to a spontaneous preterm labour (PTL) or a preterm pre-labour rupture of membranes (pPROM)...
March 14, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29536576/implementation-of-universal-screening-for-preterm-delivery-by-mid-trimester-cervical-length-measurement
#11
Athena P Souka, Ioannis Papastefanou, Athanasios Pilalis, Dimitrios Kassanos, George Papadopoulos
OBJECTIVES: To assess the feasibility and the results of introducing a policy of universal screening for preterm delivery. METHODS: Transvaginal sonography for cervical length (CL) measurement was performed at 20-24 weeks of gestation. Vaginal progesterone therapy was offered to women with CL ≤ 15mm. RESULTS: 10,969 singleton pregnancies were assessed. The decline rate was 1.32%. Spontaneous preterm delivery at less than 32 weeks (SPD32), less than 34 weeks (SPD34) and less than 37 weeks (SPD37) occurred in 0...
March 14, 2018: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29493064/progesterone-improves-perinatal-neuromotor-outcomes-in-a-mouse-model-of-intrauterine-inflammation-via-immunomodulation-of-the-placenta
#12
Christopher M Novak, Maide Ozen, Michael McLane, Sadiq Alqutub, Ji Yeon Lee, Jun Lei, Irina Burd
To assess the fetal neuroprotective potential of progesterone using a well-validated mouse model of lipopolysaccharide (LPS)-induced intrauterine inflammation (IUI). Embryonic day 17 pregnant mouse dams (n = 69) were randomly allocated to receive 17-hydroxyprogesterone caproate (17-OHPC), micronized progesterone (MP), or vehicle 1 hour prior to intrauterine injection of phosphate-buffered saline (PBS) or LPS. After 6 hours, mice were killed for the collection of placentas and fetal brains, or pregnancy continued for the evaluation of preterm birth (PTB) and offspring neuromotor function...
May 2018: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29463188/progesterone-inhibits-apoptosis-in-fetal-membranes-by-altering-expression-of-both-pro-and-antiapoptotic-proteins
#13
Yuguang Wang, Vikki M Abrahams, Guoyang Luo, Nicholas G Norwitz, Victoria V Snegovskikh, Shu-Wing Ng, Errol R Norwitz
OBJECTIVE: Progesterone supplementation prevents preterm birth (PTB) in some high-risk women, but its mechanism of action is unknown. One-third of PTB is associated with preterm premature rupture of membranes (PPROMs). We have previously shown that progesterone inhibits basal and Tumor Necrosis Factor (TNF) α-induced apoptosis in an explant model of human fetal membranes. This study investigates the molecular mechanisms responsible for progesterone-mediated inhibition of apoptosis in fetal membranes...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29460323/clinical-guidelines-for-prevention-and-management-of-preterm-birth-a-systematic-review
#14
REVIEW
N Medley, B Poljak, S Mammarella, Z Alfirevic
BACKGROUND: Clinical practice guidelines (CPG) endorse multiple strategies to prevent or manage preterm birth (PTB). OBJECTIVES: To summarise CPG recommendations for PTB and identify areas of international consensus. SEARCH STRATEGY: In May 2017 we searched for all CPG relevant to PTB without language restrictions. SELECTION CRITERIA: CPG were eligible if the following criteria were met: (1) the guideline was published or current from June 2013; (2) the guideline recommended practices for the prevention or management of PTB relevant to our prespecified clinical questions for screening, medications or surgery and other interventions; (3) publications on methods of guideline development for eligible CPG were included to enable quality assessment...
February 20, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29431359/risk-of-preterm-birth-with-vaginal-progesterone-in-twin-pregnancies
#15
M Christine Livergood, Amanda Trudell
No abstract text is available yet for this article.
November 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/29422255/prevention-of-spontaneous-preterm-birth-universal-cervical-length-assessment-and-vaginal-progesterone-in-women-with-a-short-cervix-time-for-action
#16
EDITORIAL
Stuart Campbell
No abstract text is available yet for this article.
February 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29408744/the-use-of-antenatal-fetal-magnetic-resonance-imaging-in-the-assessment-of-patients-at-high-risk-of-preterm-birth
#17
REVIEW
L Story, J Hutter, T Zhang, A H Shennan, M Rutherford
Preterm birth, defined as birth occurring prior to 37 weeks gestation is a common obstetric complication affecting 8% of pregnancies and is associated with significant morbidity and mortality. Infection/inflammation has been implicated in both the aetiology of preterm birth itself and associated neonatal pulmonary and neurological morbidity. Treatment options are currently limited to prolongation of the pregnancy using cervical cerclage, pessaries or progesterone or administration of drugs including steroids to promote lung maturity and neuroprotective agents such as magnesium sulphate, the timing of which are highly critical...
March 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29408268/the-development-of-progesterone-loaded-nanofibers-using-pressurized-gyration-a-novel-approach-to-vaginal-delivery-for-the-prevention-of-pre-term-birth
#18
Francis Brako, Bahijja Tolulope Raimi-Abraham, Suntharavathanan Mahalingam, Duncan Q M Craig, Mohan Edirisinghe
Recent evidence has continued to support the applicability of progesterone in preventing preterm birth, hence the development of an appropriate vaginal delivery system for this drug would be of considerable interest. Here, we describe the development of progesterone-loaded bioadhesive nanofibers using pressurized gyration for potential incorporation into a vaginal insert, with a particular view to addressing the challenges of incorporating a poorly water-soluble drug into a hydrophilic nanofiber carrier. Polyethylene oxide and carboxymethyl cellulose were chosen as polymers to develop the carrier systems, based on previous evidence of their yielding mucoadhesive nanofibers using the pressurized gyration technique...
April 5, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29373884/effect-of-progesterone-on-latent-phase-prolongation-in-patients-with-preterm-premature-rupture-of-membranes
#19
Fatemeh Abdali, Simin Taghavi, Shabnam Vazifekhah, Mohammad Naghavi Behzad, Mohammad Mirza Aghazadeh Attari
Preterm premature rupture of membranes (PPROM) is a condition leading to an increased risk of maternal and neonatal morbidity and mortality in pregnant women. To prevent this complication, some studies have proposed using prophylactic progesterone. However, due to lack of sufficient relevant data, there is still need for further studies in this regard. This study was performed to determine the effect of rectal progesterone on the latent phase and maternal and neonatal outcome variables in females with PPROM...
December 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/29329080/intrauterine-inflammatory-activation-functional-progesterone-withdrawal-and-the-timing-of-term-and-preterm-birth
#20
REVIEW
Jeffrey A Keelan
The central role of inflammatory processes in labour and delivery is now well-recognised. However, the biomolecular, immunological and endocrine mechanisms involved in the labour process, and the clinical manifestations of inflammation in pregnancy, are complex, variable and modulated by factors such as aetiology, ethnicity and gestational age. In this review, evidence is presented of the pivotal relationship between progesterone and inflammation in pregnancy in terms of determining the timing of labour and delivery...
February 2018: Journal of Reproductive Immunology
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