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Fetal programing

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https://www.readbyqxmd.com/read/28239420/prc2-is-required-for-extensive-reorganization-of-h3k27me3-during-epigenetic-reprogramming-in-mouse-fetal-germ-cells
#1
Lexie Prokopuk, Jessica M Stringer, Kirsten Hogg, Kirstin D Elgass, Patrick S Western
BACKGROUND: Defining how epigenetic information is established in the germline during fetal development is key to understanding how epigenetic information is inherited and impacts on evolution and human health and disease. RESULTS: Here, we show that Polycomb Repressive Complex 2 is transiently localized in the nucleus of mouse fetal germ cells, while DNA methylation is removed from the germline. This coincides with significant enrichment of trimethylated lysine 27 on histone 3 near the nuclear lamina that is dependent on activity of the essential PRC2 catalytic proteins, Enhancer of Zeste 1 and/or 2...
2017: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/28237394/developmental-changes-in-the-balance-of-glycolytic-atp-production-and-oxidative-phosphorylation-in-ventricular-cells-a-simulation-study
#2
Hitomi I Sano, Tamami Toki, Yasuhiro Naito, Masaru Tomita
The developmental program of the heart requires accurate regulation to ensure continuous circulation and simultaneous cardiac morphogenesis, because any functional abnormalities may progress to congenital heart malformation. Notably, energy metabolism in fetal ventricular cells is regulated in a manner that differs from adult ventricular cells: fetal cardiomyocytes generally have immature mitochondria and fetal ventricular cells show greater dependence on glycolytic ATP production. However, although various characteristics of energy metabolism in fetal ventricular cells have been reported, to our knowledge, a quantitative description of the contributions of these factors to fetal ventricular cell functions has not yet been established...
February 22, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28230720/role-of-vitamin-a-retinoic-acid-in-regulation-of-embryonic-and-adult-hematopoiesis
#3
REVIEW
Ana Cañete, Elena Cano, Ramón Muñoz-Chápuli, Rita Carmona
Vitamin A is an essential micronutrient throughout life. Its physiologically active metabolite retinoic acid (RA), acting through nuclear retinoic acid receptors (RARs), is a potent regulator of patterning during embryonic development, as well as being necessary for adult tissue homeostasis. Vitamin A deficiency during pregnancy increases risk of maternal night blindness and anemia and may be a cause of congenital malformations. Childhood Vitamin A deficiency can cause xerophthalmia, lower resistance to infection and increased risk of mortality...
February 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28228403/antenatal-betamethasone-attenuates-the-angiotensin-1-7-mas-receptor-nitric-oxide-axis-in-isolated-proximal-tubule-cells
#4
Yixin Su, Jianli Bi, Victor M Pulgar, Mark C Chappell, James C Rose
We previously reported a sex-specific effect of antenatal treatment with betamethasone (Beta) on sodium (Na(+)) excretion in adult sheep whereby treated males but not females had an attenuated natriuretic response to Ang-(1-7). The present study determined the Na(+) uptake and nitric oxide (NO) response to low dose Ang-(1-7) (1 pM) in renal proximal tubule cells (RPTC) from adult male and female sheep antenatally exposed to Beta or vehicle. Data were expressed as % of basal uptake or area under the curve (AUC) for Na(+) or % of control for NO...
February 22, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28219933/akt-signalling-as-a-mediator-of-cardiac-adaptation-to-low-birth-weight
#5
Kimberley Cw Wang, Kimberley J Botting, Song Zhang, Caroline McMillen, Doug A Brooks, Janna L Morrison
Intrauterine insults, such as poor nutrition and placental insufficiency, can alter cardiomyocyte development and this can have significant long-term implications for heart health. Consequently, epidemiological studies have shown that low birth weight babies have an increased risk of death from cardiovascular disease in adult life. In addition, intrauterine growth restriction can result in increased left ventricular hypertrophy, which is the strongest predictor for poor health outcomes in cardiac patients. The mechanisms responsible for these associations are not clear, but a suboptimal intrauterine environment can program alternative expression of genes such as cardiac IGF-2/H19, IGF-2R and AT1R through either an increase or decrease in DNA methylation or histone acetylation at specific loci...
February 20, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28219116/prevalence-timing-of-diagnosis-and-pregnancy-outcome-of-abdominal-wall-defects-after-the-introduction-of-a-national-prenatal-screening-program
#6
Hanneke Fleurke-Rozema, Karline van de Kamp, Marian Bakker, Eva Pajkrt, Caterina Bilardo, Rosalinde Snijders
OBJECTIVE: To examine prevalence, time of diagnosis and outcome of fetuses with an exomphalos or gastroschisis, diagnosed since the introduction of a national prenatal screening program in 2007. METHODS: A prospective cohort study was undertaken in two fetal medicine units in the Netherlands. Cases were included if the estimated due date was between 2009 and 2013. Outcome measures were gestational age at diagnosis, presence of additional anomalies, and pregnancy outcome...
February 20, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28217832/gestational-protein-restriction-study-of-the-probable-effects-on-cardiac-muscle-structure-and-function-in-adult-rats
#7
Mona G Amer, Nader M Mohamed, Aly A M Shaalan
Intrauterine growth restriction (IUGR) has been linked to heart disease in adulthood. This study aimed to examine the effect of gestational protein restriction during fetal and early postnatal life on the cardiac muscle structure and function in adult offspring. Pregnant female rats were randomly divided into two dietary groups: normal-protein diet (NP) and low-protein diet (LP). Fifteen male offspring from each group were included in the study. Offspring body weights were recorded at birth and monthly from weaning until 24 weeks of age while systolic blood pressure was measured weekly...
February 20, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28215301/neurotrophic-factors-and-maternal-nutrition-during-pregnancy
#8
M Dhobale
Maternal nutrition is one of the major determinants of pregnancy outcome. It has been suggested that reduced intakes or lack of specific nutrients during pregnancy influences the length of gestation, proper placental and fetal growth during pregnancy. Maternal nutrition, particularly micronutrients such as folate and vitamin B12, and long-chain polyunsaturated fatty acids (LCPUFA) are the major determinants of the one carbon cycle and are suggested to be at the heart of intrauterine programming of diseases in adult life...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28213434/malaria-during-pregnancy
#9
Michal Fried, Patrick E Duffy
One hundred and twenty-five million women in malaria-endemic areas become pregnant each year (see Dellicour et al. PLoS Med7: e1000221 [2010]) and require protection from infection to avoid disease and death for themselves and their offspring. Chloroquine prophylaxis was once a safe approach to prevention but has been abandoned because of drug-resistant parasites, and intermittent presumptive treatment with sulfadoxine-pyrimethamine, which is currently used to protect pregnant women throughout Africa, is rapidly losing its benefits for the same reason...
February 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28212315/developmental-programming-of-adult-disease-reprogramming-by-melatonin
#10
REVIEW
You-Lin Tain, Li-Tung Huang, Chien-Ning Hsu
Adult-onset chronic non-communicable diseases (NCDs) can originate from early life through so-called the "developmental origins of health and disease" (DOHaD) or "developmental programming". The DOHaD concept offers the "reprogramming" strategy to shift the treatment from adulthood to early life, before clinical disease is apparent. Melatonin, an endogenous indoleamine produced by the pineal gland, has pleiotropic bioactivities those are beneficial in a variety of human diseases. Emerging evidence support that melatonin is closely inter-related to other proposed mechanisms contributing to the developmental programming of a variety of chronic NCDs...
February 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208659/developmental-origins-of-chronic-kidney-disease-should-we-focus-on-early-life
#11
REVIEW
You-Lin Tain, Chien-Ning Hsu
Chronic kidney disease (CKD) is becoming a global burden, despite recent advances in management. CKD can begin in early life by so-called "developmental programming" or "developmental origins of health and disease" (DOHaD). Early-life insults cause structural and functional changes in the developing kidney, which is called renal programming. Epidemiological and experimental evidence supports the proposition that early-life adverse events lead to renal programming and make subjects vulnerable to developing CKD and its comorbidities in later life...
February 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28202385/long-term-consequences-of-disrupting-adenosine-signaling-during-embryonic-development
#12
REVIEW
Scott A Rivkees, Christopher C Wendler
There is growing evidence that disruption in the prenatal environment can have long-lasting effects on an individual's health in adulthood. Research on the fetal programming of adult diseases, including cardiovascular disease, focuses on epi-mutations, which alter the normal pattern of epigenetic factors such as DNA methylation, miRNA expression, or chromatin modification, rather than traditional genetic alteration. Thus, understanding how in utero chemical exposures alter epigenetics and lead to adult disease is of considerable public health concern...
February 13, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28196661/pediatric-medical-device-development-by-surgeons-via-capstone-engineering-design-programs
#13
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/28194805/fetal-adaptations-in-insulin-secretion-result-from-high-catecholamines-during-placental-insufficiency
#14
Sean W Limesand, Paul J Rozance
Placental insufficiency and intrauterine growth restriction (IUGR) of the fetus affects approximately 8% of all pregnancies and is associated with short- and long-term disturbances in metabolism. In pregnant sheep, experimental models with a small, defective placenta that restricts delivery of nutrients and oxygen to the fetus result in IUGR. Low blood oxygen concentrations increase fetal plasma catecholamine concentrations, which lower fetal insulin concentrations. All of these observations in sheep models with placental insufficiency are consistent with cases of human IUGR...
February 14, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28192175/increased-anxiety-like-phenotype-in-female-guinea-pigs-following-reduced-neurosteroid-exposure-in-utero
#15
Angela L Cumberland, Hannah K Palliser, Gabrielle K Crombie, David W Walker, Jonathan J Hirst
Neurosteroids are essential for aiding proper fetal neurodevelopment. Pregnancy compromises such as preterm birth, prenatal stress and intrauterine growth restriction are associated with an increased risk of developing behavioural and mood disorders, particularly during adolescence. These pathologies involve the premature loss or alteration of trophic steroid hormones reaching the fetus leading to impaired neurodevelopment. While the specific programming mechanisms are yet to be fully elucidated, in adult life, dysfunctions of allopregnanolone action are prevalent in individuals with depression, post-traumatic stress disorder and anxiety disorders...
February 9, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28188771/twin-vaginal-delivery-innovate-or-abdicate
#16
REVIEW
Sarah Rae Easter, Laura Taouk, Jay Schulkin, Julian N Robinson
Neonatal safety data along with national guidelines have prompted renewed interest in vaginal delivery of twins-particularly in the case of the noncephalic second twin. Yet the rising rate of twin cesarean deliveries, coupled with the national decline in operative obstetrics, raise concerns about the availability of providers skilled in twin vaginal birth. Providers are key stakeholders for increasing rates of twin vaginal delivery. We surveyed a group of practicing obstetricians to explore potential barriers to vaginal birth of twins with a focus on delivery of the noncephalic second twin...
February 7, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28188211/cluh-regulates-mitochondrial-metabolism-by-controlling-translation-and-decay-of-target-mrnas
#17
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/28186106/impact-of-dehydroepiandrosterone-sulfate-on-newborn-leukocyte-telomere-length
#18
Han Liu, Guangdi Zhou, Qian Chen, Fengxiu Ouyang, Julian Little, Jun Zhang, Dan Chen
The newborn setting of leukocyte telomere length (LTL) likely has important implications for telomere dynamics over the lifespan. However, its determinants are poorly understood. Hormones play an important role during pregnancy and delivery. We hypothesized that exposure to hormones may impact the fetal telomere biology system. To test this hypothesis, cortisol, estradiol, dehydroepiandrosterone sulfate (DHEAS) and reactive oxygen species (ROS) were measured in cord blood of 821 newborns from a prospective study...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28186000/monitoring-fetal-maturation-objectives-techniques-and-indices-of-autonomic-function
#19
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/28180200/acoustic-radiation-force-impulse-elastosonography-of-placenta-in-maternal-red-blood-cell-alloimmunization-a-preliminary-and-descriptive-study
#20
Orkun Cetin, Erbil Karaman, Harun Arslan, Ibrahim Akbudak, Recep Yıldızhan, Ali Kolusarı
AIMS: Maternal red blood cell alloimmunization is an important cause of fetal morbidity and mortality in the perinatal period, despite well-organized prophylaxis programs. The objective of the study was to evaluate placental elasticity by using Acoustic Radiation Force Impulse (ARFI) in Rhesus (Rh) alloimmunized pregnant women with hydropic and nonhydropic fetuses and to compare those with healthy pregnant women. MATERIAL AND METHODS: This case-control and descriptive study comprised twenty-eight healthy pregnant women, 14 Rh alloimmunized pregnant women with nonhydropic fetuses, and 16 Rh alloimmunized pregnant women with hydropic fetuses in the third trimester of pregnancy...
January 31, 2017: Medical Ultrasonography
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