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Fetal lung maturity

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https://www.readbyqxmd.com/read/29028158/effects-of-intratracheal-budesonide-during-early-postnatal-life-on-lung-maturity-of-premature-fetal-rabbits
#1
Ling Li, Chen Yang, Xiuliang Feng, Yongping Du, Zhihong Zhang, Yueping Zhang
AIM: This study aimed to study the effects of intratracheal instillation of budesonide on lung maturity of premature fetal rabbits. The developmental pattern of pulmonary alveoli in rabbits is similar to that in humans. METHOD: Fetal rabbits were taken out from female rabbits on the 28th day of pregnancy (full term = 31 days) by cesarean section (c-section). The fetal rabbits were divided into four groups: control (normal saline, NS), budesonide (budesonide, BUD), calf pulmonary surfactant for injection (pulmonary surfactant, PS), and calf pulmonary surfactant + budesonide for injection (pulmonary surfactant + budesonide, PS + BUD)...
October 13, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29022513/discrepancies-in-animal-models-of-preterm-birth
#2
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/29018962/the-fetal-lung-to-liver-signal-intensity-ratio-on-magnetic-resonance-imaging-as-a-predictor-of-outcomes-from-isolated-congenital-diaphragmatic-hernia
#3
Masaya Yamoto, Teruo Iwazaki, Kasumi Takeuchi, Kyouhei Sano, Koji Fukumoto, Toshiaki Takahashi, Akiyoshi Nomura, Kei Ooyama, Akinori Sekioka, Yutaka Yamada, Naoto Urushihara
PURPOSE: We investigated the developmental changes in the unaffected contralateral lungs of patients with isolated left-sided congenital diaphragmatic hernia (CDH) using signal intensity ratios on prenatal magnetic resonance imaging (MRI) and determined whether these changes correlated with clinical outcomes. METHODS: We performed 47 fetal MRI screens on 30 patients with isolated left-sided CDH. A cohort of 88 fetuses was selected as the control. We calculated the lung-to-liver signal intensity ratio (LLSIR) using region of interest analysis and compared LLSIR between the groups and between those in the CDH group with good and poor prognoses...
October 10, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/28958716/evaluation-of-alveolar-epithelial-cells-in-the-sheep-model-of-congenital-diaphragmatic-hernia-type-1-alveolar-epithelial-cells-and-histopathological-image-analysis
#4
Juma Obayashi, Kohei Kawaguchi, Junki Koike, Kunihide Tanaka, Yasuji Seki, Hideki Nagae, Shutaro Manabe, Kei Ohyama, Masayuki Takagi, Hiroaki Kitagawa, Kevin C Pringle
BACKGROUND: There are few reports comparing type 1 alveolar epithelial cell development with histopathological image analysis. We investigated these as indicators of maturity in fetal lambs' lungs in a congenital diaphragmatic hernia (CDH) model. METHODS: We created left CDH in 4 fetal lambs at 75 or 76days' gestation (Group A). Controls were 5 sham-operated lambs (Group B); both groups delivered at term. The right lower lung lobe (RLL) and left lower lobe (LLL) were sampled...
September 4, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28950169/lipidomics-of-equine-amniotic-fluid-identification-of-amphiphilic-o-acyl-%C3%AF-hydroxy-fatty-acids
#5
Paul L Wood, Barry A Ball, Kirsten Scoggin, Mats H Troedsson, Edward L Squires
Amniotic fluid is essential for the growth and maturation of the fetus prior to parturition. While our knowledge of human amniotic fluid is extensive, current data for equine amniotic fluid is limited. We therefore undertook a detailed lipidomics analysis of equine amniotic fluid. Using a non-targeted high-resolution mass spectrometric lipidomics analysis of equine amniotic fluid, we were able to characterize a diverse array of individual lipids. This non-biased analytical approach detected, for the first time, the presence of (O-acyl)-ω-hydroxy-fatty acids (OAHFA) with up to 52 carbon chain lengths in amniotic fluid...
September 20, 2017: Theriogenology
https://www.readbyqxmd.com/read/28949968/normalisation-of-surfactant-protein-a-and-b-expression-in-the-lungs-of-low-birth-weight-lambs-by-21-days-old
#6
Jia Yin Soo, Sandra Orgeig, Erin Victoria McGillick, Song Zhang, I Caroline McMillen, Janna L Morrison
Intrauterine growth restriction (IUGR) induced by placental restriction (PR) in the sheep negatively impacts lung and pulmonary surfactant development during fetal life. Using a sheep model of low birth weight (LBW), we found that there was an increase in mRNA expression of surfactant protein (SP)-A, -B and -C in the lung of LBW lambs but no difference in the protein expression of SP-A or -B. LBW also resulted in increased lysosome-associated membrane glycoprotein (LAMP)-3 mRNA expression, which may indicate an increase in either the density of type II Alveolar epithelial cells (AEC) or maturity of type II AECs...
2017: PloS One
https://www.readbyqxmd.com/read/28926341/maternal-plasma-lpcat-1-mrna-correlates-with-lamellar-body-count
#7
Robert A Welch, Maurice-Andre Recanati, Kathryn C Welch, Michael K Shaw
Human lysophosphatidylcholine acyltransferase 1 (hLPCAT1) is a protein which helps produce surfactant in the fetal lung. We previously reported that levels of cell-free fetal mRNA for hLPCAT1 in amniotic fluid are correlated with lamellar body count (LBC) (r2=0.93). This short communication demonstrates that fetal hLPCAT1 mRNA is also present in maternal blood. Its quantity also correlates with amniotic fluid LBC (r2=0.81). Research in maternal plasma hLPCAT1 may assist in understanding fetal and placental maturational processes...
September 19, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28902364/functional-roles-of-c-ebp%C3%AE-and-sumo%C3%A2-modification-in-lung-development
#8
Yuan-Dong Chen, Jiang-Yan Liu, Yan-Min Lu, Hai-Tao Zhu, Wei Tang, Qiu-Xia Wang, Hong-Yan Lu
CCAAT enhancer binding protein alpha (C/EBPα) is a transcription factor regulating the core aspects of cell growth and differentiation. The present study investigated the level and functional role of C/EBPα during the development of the rat lung. C/EBPα protein exhibits a dynamic expression pattern. The correlation between the expression of C/EBPα protein and the content of glycogen during lung maturation was analyzed to understand the function of C/EBPα in lung differentiation. The high expression of C/EBPα coincides with the reduction of glycogen in the fetal lung...
October 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28860525/glucocorticoids-are-lower-at-delivery-in-maternal-but-not-cord-blood-of-obese-pregnancies
#9
Laura I Stirrat, George Just, Natalie Z M Homer, Ruth Andrew, Jane E Norman, Rebecca M Reynolds
Glucocorticoids are vital for lung maturation. We previously showed that cortisol is lower in obese pregnancy. Whether this is maintained at delivery is unknown but is clinically relevant as maternal and cord blood cortisol levels are correlated and offspring of obese are more likely to need neonatal respiratory support. We hypothesized that glucocorticoids are lower in maternal and cord blood at delivery in obese pregnancies. Glucocorticoids (cortisol and corticosterone) and their inactive versions (cortisone and 11-dehydrocorticosterone) were measured by LC-MS/MS in maternal and cord plasma from 259 Caucasian women at delivery (BMI 18-55 kg/m(2))...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28858117/exacerbation-of-primary-intestinal-lymphangiectasia-during-late-pregnancy-and-recovery-after-delivery-a-case-report-and-literature-review
#10
REVIEW
Jianyang Lu, Hongbo Zhai
RATIONALE: Primary intestinal lymphangiectasia (PIL) is a rare disease characterized by dilated intestinal lacteals resulting in lymph leakage into the small bowel lumen. Main clinical features include intermittent diarrhea, hypoproteinemia. Scattered case reports suggested that PIL is compatible to pregnancy, but with increased complications. PATIENT CONCERNS: A 34-year-old woman with endoscopically diagnosed PIL presented to antenatal our clinic at 10 weeks into gestation...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28836410/effect-of-fetal-mouse-lung-tissue-co-culture-on-in-vitro-maturation-of-mouse-immature-oocytes
#11
Masomeh Belbasi, Seyed Gholam Ali Jorsaraei, Maryam Gholamitabar Tabari, Ramzan Khanbabaei
OBJECTIVES: The aim of this study was to evaluate the fetal mouse lung tissue co-culture on in vitro maturation (IVM) of mouse immature oocytes. MATERIALS AND METHODS: In this experimental study, germinal vesicle (GV) oocytes from ovaries of a group of 25 female mice, 6-8 weeks of age, were dissected after being stimulated by 7.5 IU pregnant mare serum gonadotropin (PMSG) through an intraperitoneal (IP) injection. The fetal lung tissues were then prepared and cultured individually...
October 2017: Cell Journal
https://www.readbyqxmd.com/read/28833496/expression-of-nestin-in-embryonic-tissues-and-its-effects-on-clinicopathological-characteristics-of-patients-with-placenta-previa
#12
Yan-Yan Qiao, Ping Chu
In this study, we examined expression of nestin in the spinal cord, lung, kidney, stomach, colon and intestine tissues at different stages of embryos in patients with placenta previa. Fetuses of 75 patients with placenta previa were assigned to case group and 80 fetuses from healthy pregnant women with normal placenta who voluntarily terminated pregnancy to control group. Clinical data of pregnant women were collected at the time of admission. Blood from elbow vein was collected to determine expression of serum nestin...
August 18, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28827121/a-scid-mouse-human-lung-xenograft-model-of-varicella-zoster-virus-infection
#13
Wei Wang, Dequan Pan, Wenkun Fu, Linli Cai, Jianghui Ye, Jian Liu, Che Liu, Xiumin Huang, Yanzhen Lin, Ningshao Xia, Tong Cheng, Hua Zhu
Varicella pneumonia is one of the most serious, potentially life-threatening complications of primary varicella-zoster virus (VZV) infection in adults and immunocompromised individuals. However, studies on the lung pathogenesis of VZV infection as well as development and testing of antivirals have long been hindered by limited access to clinical samples and a lack of suitable animal models. In this study, we report for the first time the use of human lung xenografts in SCID mice for investigating VZV infection...
August 18, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28759122/differential-effects-of-late-gestation-maternal-overnutrition-on-the-regulation-of-surfactant-maturation-in-fetal-and-postnatal-life
#14
Mitchell C Lock, Erin V McGillick, Sandra Orgeig, I Caroline McMillen, Beverly S Mühlhäusler, Song Zhang, Janna L Morrison
With the increasing incidence of obesity worldwide, the proportion of women entering pregnancy overweight or obese has increased dramatically. The fetus of an overnourished mother experiences numerous metabolic changes that may modulate lung development and hence successful transition to air-breathing at birth. We used a sheep model of maternal late gestation overnutrition (LGON; from 115 d gestation, term 147 ± 3 d) to determine the effect of exposure to an increased plane of nutrition in late gestation on lung development in the fetus (at 141 d gestation) and the lamb (30 d after birth)...
July 31, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28735176/reduced-short-term-variation-following-antenatal-administration-of-betamethasone-is-reduced-fetal-size-a-predisposing-factor
#15
Tullio Ghi, Andrea Dall'Asta, Gabriele Saccone, Federica Bellussi, Tiziana Frusca, Pasquale Martinelli, Gianluigi Pilu, Nicola Rizzo
OBJECTIVE: To assess the association between fetal size and the incidence of reduced short-term variability (STV) following bethametasone administration for fetal lung maturity. STUDY DESIGN: This was a retrospective, multicenter, cohort study conducted in two Tertiary University Units. Only uncomplicated singleton pregnancies admitted for threatened preterm labor between 26 and 34 weeks and submitted to betamethasone for fetal lung maturity were included. Delivery occurring within 72h from betamethasone administration represented criteria for exclusion...
July 10, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28693356/contemporary-practice-patterns-in-the-use-of-amniocentesis-for-fetal-lung-maturity
#16
Kevin C Visconti, Emily DeFranco, Beena D Kamath-Rayne
PURPOSE: Fetal lung maturity (FLM) testing has been performed to help direct delivery timing in complex obstetrical conditions. We explored current practice patterns of FLM testing attempting to identify factors affecting its use. MATERIALS AND METHODS: We distributed a 31-question survey to obstetricians and perinatologists that examined practice characteristics potentially affecting FLM usage. Logistic regression measured associations between these factors and test utilization...
July 25, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28627012/effect-of-betamethasone-on-fetal-pulmonary-and-umbilical-artery-doppler-velocimetry-and-relationship-with-respiratory-distress-syndrome-development
#17
Emre Sinan Güngör, Gülşah İlhan, Hüseyin Gültekin, Ali Galip Zebitay, Serdar Cömert, Fatma Ferda Verit
OBJECTIVES: Respiratory distress syndrome (RDS) is a major cause of neonatal morbidity and mortality. It is primarily a disease of premature neonates. The aim of this study was to evaluate the impact of maternal betamethasone administration on the fetal pulmonary arteries (PAs) and umbilical arteries (UAs) and the correlation between RDS development and PA Doppler results. METHODS: Forty singleton pregnancies between 24 and 34 gestational weeks with a diagnosis of preterm birth were included prospectively...
June 19, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28538237/update-on-postnatal-steroids
#18
Henry L Halliday
Antenatal steroid treatment to enhance fetal lung maturity and surfactant treatment to prevent or treat respiratory distress syndrome have been major advances in perinatal medicine in the past 40 years contributing to improved outcomes for preterm infants. Use of postnatal steroids to prevent or treat chronic lung disease in preterm infants has been less successful and associated with adverse neurodevelopmental outcomes. Although early (in the first week of life) postnatal steroid treatment facilitates earlier extubation and reduces the risk of chronic lung disease, it is associated with adverse effects, such as hyperglycemia, hypertension, gastrointestinal bleeding and perforation, hypertrophic cardiomyopathy, growth failure, and cerebral palsy, and cannot be recommended...
2017: Neonatology
https://www.readbyqxmd.com/read/28532833/estimation-of-fetal-lung-development-using-quantitative-analysis-of-ultrasonographic-images-in-normal-canine-pregnancy
#19
T Banzato, G Zovi, C Milani
We investigated the quantitative analysis of sonographic images to predict fetal lung maturity of the canine foetus in normal pregnancy. Twelve bitches were recruited in the present study. Serial ultrasonographic exams were performed at three pre-determined time periods corresponding to the pseudoglandular (40-48 days of pregnancy), canalicular (49-56 days of pregnancy) and saccular phase (57-63 days of pregnancy) of lung development. Mean grey level (MGL) and the standard deviation of the histogram (SDH) of fetal lung and liver sonographic images were measured with dedicated software...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28527483/single-fetal-death-in-monochorionic-twin-pregnancy-co-twin-prognosis-and-neonatal-outcome
#20
Emídio Vale-Fernandes, Joana Dias, Belandina Gil, Alexandra Cadilhe
The incidence of single fetal death in twin pregnancy varies from 0.5% - 6.8%, leaving the surviving fetus with increased morbi-mortality. The prognosis is worse in monochorionic pregnancies. In addressing these cases it should be noted referral to tertiary center with differentiated perinatal support, induction of fetal lung maturation and termination of pregnancy if there's loss of fetal well-being or possibility of maternal complications and suspected neurological sequelae in the surviving fetus. The risk of iatrogenic prematurity should always be weighed with the possible consequences arising from the fetus staying in a hostile uterine environment...
February 27, 2017: Acta Médica Portuguesa
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