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Fetal physiology

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https://www.readbyqxmd.com/read/28199380/the-effects-of-pravastatin-on-the-normal-human-placenta-lessons-from-ex-vivo-models
#1
Adelina Balan, Irit Szaingurten-Solodkin, Shani S Swissa, Valeria Feinshtein, Mahmoud Huleihel, Gershon Holcberg, Doron Dukler, Ofer Beharier
INTRODUCTION: Research in animal models and preliminary clinical studies in humans support the use of pravastatin for the prevention of preeclampsia. However, its use during pregnancy is still controversial due to limited data about its effect on the human placenta and fetus. METHODS: In the present study, human placental cotyledons were perfused in the absence or presence of pravastatin in the maternal reservoir (PraM). In addition, placental explants were treated with pravastatin for 5, 24 and 72 h under normoxia and hypoxia...
2017: PloS One
https://www.readbyqxmd.com/read/28197939/prenatal-counseling-of-fetal-congenital-heart-disease
#2
REVIEW
Caroline K Lee
The field of fetal cardiology has advanced greatly over the last two decades and congenital heart defects can now be identified in utero with a high level of accuracy. Prenatal counseling of parents given the news of a fetal cardiac defect is an important role of the fetal cardiologist. Prenatal counseling is a complex task that requires skill to perform and interpret fetal echocardiograms, an understanding of fetal and postnatal cardiovascular physiology, knowledge of therapeutic and surgical options, and of long-term outcomes including quality of life...
January 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28196661/pediatric-medical-device-development-by-surgeons-via-capstone-engineering-design-programs
#3
Bryan S Sack, Rodolfo A Elizondo, Gene O Huang, Nicolette Janzen, Jimmy Espinoza, Magdalena Sanz-Cortes, Jennifer E Dietrich, Julie Hakim, Eric Richardson, Maria Oden, John Hanks, Balakrishna Haridas, James F Hury, Chester J Koh
BACKGROUND: There is a need for pediatric medical devices that accommodate the unique physiology and anatomy of pediatric patients that is increasingly receiving more attention. However, there is limited literature on the programs within children's hospitals and academia that can support pediatric device development. We describe our experience with pediatric device design utilizing collaborations between a children's hospital and two engineering schools. METHODS: Utilizing the academic year as a timeline, unmet pediatric device needs were identified by surgical faculty and matched with an engineering mentor and a team of students within the Capstone Engineering Design programs at two universities...
February 6, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28192373/cardiac-nuclear-receptors-architects-of-mitochondrial-structure-and-function
#4
Rick B Vega, Daniel P Kelly
The adult heart is uniquely designed and equipped to provide a continuous supply of energy in the form of ATP to support persistent contractile function. This high-capacity energy transduction system is the result of a remarkable surge in mitochondrial biogenesis and maturation during the fetal-to-adult transition in cardiac development. Substantial evidence indicates that nuclear receptor signaling is integral to dynamic changes in the cardiac mitochondrial phenotype in response to developmental cues, in response to diverse postnatal physiologic conditions, and in disease states such as heart failure...
February 13, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28188211/cluh-regulates-mitochondrial-metabolism-by-controlling-translation-and-decay-of-target-mrnas
#5
Désirée Schatton, David Pla-Martin, Marie-Charlotte Marx, Henriette Hansen, Arnaud Mourier, Ivan Nemazanyy, Alberto Pessia, Peter Zentis, Teresa Corona, Vangelis Kondylis, Esther Barth, Astrid C Schauss, Vidya Velagapudi, Elena I Rugarli
Mitochondria are essential organelles that host crucial metabolic pathways and produce adenosine triphosphate. The mitochondrial proteome is heterogeneous among tissues and can dynamically change in response to different metabolic conditions. Although the transcriptional programs that govern mitochondrial biogenesis and respiratory function are well known, posttranscriptional regulatory mechanisms remain unclear. In this study, we show that the cytosolic RNA-binding protein clustered mitochondria homologue (CLUH) regulates the expression of a mitochondrial protein network supporting key metabolic programs required under nutrient deprivation...
February 10, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28186000/monitoring-fetal-maturation-objectives-techniques-and-indices-of-autonomic-function
#6
Dirk Hoyer, Jan Zebrowski, Dirk Cysarz, Hernani Goncalves, Adelina Pytlik, Celia Amorim-Costa, Joao Bernardes, Diogo Ayres-de-Campos, Otto Witte, Ekkehard Schleussner, Lisa Stroux, Christopher Redman, Antoniya Georgieva, Stephen Payne, Gari Clifford, Maria Signorini, Giovanni Magenes, Fernando Andreotti, Hagen Malberg, Sebastian Zaunseder, Igor Lakhno, Uwe Schneider
Monitoring the fetal behavior does not only have implications for acute care but also for identifying developmental disturbances that burden the entire later life. The concept, of "fetal programming", also known as "developmental origins of adult disease hypothesis", e.g. applies for cardiovascular, metabolic, hyperkinetic, cognitive disorders. Since the autonomic nervous system is involved in all of those systems, cardiac autonomic control may provide relevant functional diagnostic and prognostic information...
February 10, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28185343/birth-and-death-evidence-for-the-same-biologic-clock
#7
Mark Phillippe, Shiela M Phillippe
In mammals, there exists a strong correlation between the average life span (in years) and the length of gestation (in days), suggesting that the same biologic clock mechanisms control both of these physiologic events. Life span is determined by a complex sequence of events leading to organismal senescence, and ultimately death. Although multiple biochemical and cellular phenomena are believed to be involved, progressive telomere shortening due to oxidative stress and loss during DNA replication is believed to be an important determinant contributing to aging, senescence, and adult death...
February 10, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28183674/albumin-coatings-by-alternating-current-electrophoretic-deposition-for-improving-corrosion-resistance-and-bioactivity-of-titanium-implants
#8
Sarah Höhn, Annabel Braem, Bram Neirinck, Sannakaisa Virtanen
Although Ti alloys are generally regarded to be highly corrosion resistant, inflammatory conditions following surgery can instigate breakdown of the TiO2 passivation layer leading to an increased metal ion release. Furthermore proteins present in the surrounding tissue will readily adsorb on a titanium surface after implantation. In this paper alternating current electrophoretic deposition (AC-EPD) of bovine serum albumin (BSA) on Ti6Al4V was investigated in order to increase the corrosion resistance and control the protein adsorption capability of the implant surface...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28179808/sex-differences-in-the-developing-brain-as-a-source-of-inherent-risk
#9
Margaret M McCarthy
Brain development diverges in males and females in response to androgen production by the fetal testis. This sexual differentiation of the brain occurs during a sensitive window and induces enduring neuroanatomical and physiological changes that profoundly impact behavior. What we know about the contribution of sex chromosomes is still emerging, highlighting the need to integrate multiple factors into understanding sex differences, including the importance of context. The cellular mechanisms are best modeled in rodents and have provided both unifying principles and surprising specifics...
December 2016: Dialogues in Clinical Neuroscience
https://www.readbyqxmd.com/read/28178290/prenatal-exposure-to-respiratory-syncytial-virus-alters-postnatal-immunity-and-airway-smooth-muscle-contractility-during-early-life-reinfections
#10
Paul M Brown, Terri J Harford, Vandana Agrawal, Belinda Yen-Lieberman, Fariba Rezaee, Giovanni Piedimonte
Maternal viral infections can have pathological effects on the developing fetus which last long after birth. Recently, maternal-fetal transmission of respiratory syncytial virus (RSV) was shown to cause postnatal airway hyperreactivity (AHR) during primary early-life reinfection; however, the influence of prenatal exposure to RSV on offspring airway immunity and smooth muscle contractility during recurrent postnatal reinfections remains unknown. Therefore, we sought to determine whether maternal RSV infection impairs specific aspects of cell-mediated offspring immunity during early-life reinfections and the mechanisms leading to AHR...
2017: PloS One
https://www.readbyqxmd.com/read/28177716/a-role-for-maternally-derived-myokines-to-optimize-placental-function-and-fetal-growth-across-gestation
#11
Chantal Dubé, Céline Aguer, Kristi Adamo, Shannon Bainbridge
Exercise during pregnancy is associated with improved health outcomes for both mother and baby, including a reduced risk of future obesity and susceptibility to chronic diseases. Overwhelming evidence demonstrates a protective effect of maternal exercise against fetal birth weight extremes, reducing the rates of both large- and small-for-gestational-age infants. It is speculated that this protective effect is mediated in part through exercise-induced regulation of maternal physiology and placental development/function...
January 17, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28173875/restored-in-vivo-like-membrane-lipidomics-positively-influence-in-vitro-features-of-cultured-mesenchymal-stromal-stem-cells-derived-from-human-placenta
#12
Alexandros Chatgilialoglu, Martina Rossi, Francesco Alviano, Paola Poggi, Chiara Zannini, Cosetta Marchionni, Francesca Ricci, Pier Luigi Tazzari, Valentina Taglioli, Philip C Calder, Laura Bonsi
BACKGROUND: The study of lipid metabolism in stem cell physiology has recently raised great interest. The role of lipids goes beyond the mere structural involvement in assembling extra- and intra-cellular compartments. Nevertheless, we are still far from understanding the impact of membrane lipidomics in stemness maintenance and differentiation patterns. In the last years, it has been reported how in vitro cell culturing can modify membrane lipidomics. The aim of the present work was to study the membrane fatty acid profile of mesenchymal stromal cells (MSCs) derived from human fetal membranes (hFM-MSCs) and to correlate this to specific biological properties by using chemically defined tailored lipid supplements (Refeed®)...
February 7, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28169502/physiological-adaptation-of-maternal-plasma-volume-during-pregnancy-a-systematic-review-and-meta-analysis
#13
REVIEW
S de Haas, C Ghossein-Doha, S M J van Kuijk, J van Drongelen, M E A Spaanderman
OBJECTIVE: To describe the physiological pattern of gestational plasma volume adjustments in normal singleton pregnancy and compare this with the pattern in pregnancies complicated by pregnancy-induced hypertension, pre-eclampsia or fetal growth restriction. METHODS: We performed a meta-analysis of the current literature on plasma volume adjustments during physiological and complicated pregnancies. Literature was retrieved from PubMed (NCBI) and EMBASE (Ovid) databases...
February 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28165176/cardiotocographic-parameters-in-small-for-gestational-age-fetuses-how-do-they-vary-from-normal-at-different-gestational-ages-a-study-of-11687-fetuses-from-25-to-40-weeks-of-pregnancy
#14
Célia Amorim-Costa, Diogo Ayres de Campos, João Bernardes
AIM: The aim of this study was to assess how cardiotocographic (CTG) parameters differ between small-for-gestational-age (SGA) and normal fetuses at different gestational ages. METHODS: This was a retrospective cross-sectional study using the first antepartum tracing of singleton pregnancies with no malformations. Fetuses with birthweight ≥10th percentile for gestational age and other normal pregnancy outcome criteria (term birth, normal umbilical artery pH and Apgar scores, no intensive care unit admission) were compared with fetuses with birthweight <10th and <3rd percentiles for gestational age (SGA < p10 and SGA < p3, a subgroup of the latter)...
February 6, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28160259/protein-malnutrition-during-fetal-programming-induces-fatty-liver-in-adult-male-offspring-rats
#15
Sabrina Edith Campisano, Stella Maris Echarte, Enrique Podaza, Andrea Nancy Chisari
We evaluated the effects of protein malnutrition on liver morphology and physiology in rats subjected to different malnutrition schemes. Pregnant rats were fed with a control diet or a low protein diet (LPD). Male offspring rats received a LPD during gestation, lactation, and until they were 60 days old (MM group), a late LPD that began after weaning (CM), or a LPD administrated only during the gestation-lactation period followed by a control diet (MC). On day 60, blood was collected and the liver was dissected out...
February 3, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28157383/biomarkers-of-oxidative-stress-in-pregnancy-complications
#16
James Sm Cuffe, Ziheng Calvin Xu, Anthony V Perkins
Pregnancy complications including pre-eclampsia, gestational-diabetes mellitus, preterm birth and intrauterine growth restriction can cause acute and chronic health problems for the mother and lead to fetal loss or dysregulation of infant physiology. The human placenta is susceptible to oxidative stress and oxidative damage in early gestation contributes to the onset of these conditions later in pregnancy. Current methods of predicting pregnancy complications are limited and although a large number of factors are associated with disease progression, few biomarkers have been used to aid in disease diagnosis early in gestation...
February 3, 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/28153654/reduction-of-total-labour-length-through-the-addition-of-parenteral-dextrose-solution-in-induction-of-labor-in-nulliparous-results-of-dextrons-prospective-randomized-controlled-trial
#17
Josianne Paré, Jean-Charles Pasquier, Antoine Lewin, William Fraser, Yves-André Bureau
BACKGROUND: Prolonged labor is a significant cause of maternal and fetal morbidity and very few interventions are known to shorten labor course. Skeletal muscle physiology suggests that glucose supplementation might improve muscle performance in case of prolonged exercise and this situation is analogous to the gravid uterus during delivery. Therefore, it seemed imperative to evaluate the impact of adding carbohydrate supplements on the course of labor. OBJECTIVE(S): To provide evidence as to whether IV glucose supplementation during labor induction in nulliparous women can reduce total duration of active labor...
January 28, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28144955/hypothyroidism-in-utero-stimulates-pancreatic-beta-cell-proliferation-and-hyperinsulinaemia-in-the-ovine-fetus-during-late-gestation
#18
Shelley E Harris, Miles J De Blasio, Melissa A Davis, Amy C Kelly, Hailey M Davenport, F B Peter Wooding, Dominique Blache, David Meredith, Miranda Anderson, Abigail L Fowden, Sean W Limesand, Alison J Forhead
Development of pancreatic beta cell mass before birth is essential for normal growth of the fetus and for long-term control of carbohydrate metabolism in postnatal life. Thyroid hormones are also important regulators of fetal growth, and the present study tested the hypotheses that thyroid hormones promote beta cell proliferation in the fetal ovine pancreatic islets, and that growth retardation in hypothyroid fetal sheep is associated with reductions in pancreatic beta cell mass and circulating insulin concentration in utero...
January 31, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28141546/the-impact-of-psychological-distress-during-pregnancy-on-the-developing-fetus-biological-mechanisms-and-the-potential-benefits-of-mindfulness-interventions
#19
Monica Isgut, Alicia K Smith, Eduardo Schuch Reimann, Omer Kucuk, Joanne Ryan
The in utero environment plays an essential role in shaping future growth and development. Psychological distress during pregnancy has been shown to perturb the delicate physiological milieu of pregnancy, and has been associated with negative repercussions in the offspring, including adverse birth outcomes, long-term defects in cognitive development, behavioral problems during childhood and high baseline levels of stress-related hormones. Fetal epigenetic programming, involving epigenetic processes, may help explain the link between maternal prenatal stress and its negative effects on the child...
January 31, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28135002/ischemia-reperfusion
#20
Theodore Kalogeris, Christopher P Baines, Maike Krenz, Ronald J Korthuis
Ischemic disorders, such as myocardial infarction, stroke, and peripheral vascular disease, are the most common causes of debilitating disease and death in westernized cultures. The extent of tissue injury relates directly to the extent of blood flow reduction and to the length of the ischemic period, which influence the levels to which cellular ATP and intracellular pH are reduced. By impairing ATPase-dependent ion transport, ischemia causes intracellular and mitochondrial calcium levels to increase (calcium overload)...
December 6, 2016: Comprehensive Physiology
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