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Fetal hypoxia

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https://www.readbyqxmd.com/read/28812466/florid-intussusceptive-like-microvascular-dysangiogenesis-in-a-preterm-lung
#1
Monique E De Paepe, Merline Kocheekkaran V Benny, Lauren Priolo, Francois I Luks, Svetlana Shapiro
The cellular mechanisms underlying the microvascular dysangiogenesis of bronchopulmonary dysplasia (chronic lung disease of the newborn) remain largely undetermined. We report unusual pulmonary vascular findings in a 27-week-gestation male newborn who died on the second day of life from intractable respiratory failure, following a pregnancy complicated by prolonged membrane rupture and persistent severe oligohydramnios. As expected, postmortem examination revealed pulmonary hypoplasia (lung/body weight ratio: 2...
September 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28808079/the-impact-of-iugr-on-pancreatic-islet-development-and-%C3%AE-cell-function
#2
Brit H Boehmer, Sean W Limesand, Paul J Rozance
Placental insufficiency is a primary cause of intrauterine growth restriction (IUGR). IUGR increases the risk of developing type 2 diabetes mellitus (T2DM) throughout life, which indicates that insults from placental insufficiency impair β-cell development during the perinatal period because β-cells have a central role in the regulation of glucose tolerance. The severely IUGR fetal pancreas is characterized by smaller islets, less β-cells, and lower insulin secretion. Because of the important associations among impaired islet growth, β-cell dysfunction, impaired fetal growth, and the propensity for T2DM, significant progress has been made in understanding the pathophysiology of IUGR and programing events in the fetal endocrine pancreas...
August 14, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28801981/pregnancy-outcomes-in-mothers-of-offspring-with-inherited-bone-marrow-failure-syndromes
#3
Neelam Giri, Helen D Reed, Pamela Stratton, Sharon A Savage, Blanche P Alter
BACKGROUND: Children with inherited bone marrow failure syndromes (IBMFSs) may be symptomatic in utero, resulting in maternal and fetal problems during the pregnancy. Subsequent pregnancies by their mothers should be considered "high risk". METHODS: We retrospectively analyzed outcomes of 575 pregnancies in 165 unaffected mothers of offspring with Fanconi anemia (FA), dyskeratosis congenita (DC), Diamond-Blackfan anemia (DBA), and Shwachman-Diamond syndrome (SDS) for events noted during pregnancy, labor, and delivery...
August 12, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28798665/maternal-diabetes-alters-expression-of-micrornas-that-regulate-genes-critical-for-neural-tube-development
#4
Seshadri Ramya, Sukanya Shyamasundar, Boon Huat Bay, S Thameem Dheen
Maternal diabetes is known to cause neural tube defects (NTDs) in embryos and neuropsychological deficits in infants. Several metabolic pathways and a plethora of genes have been identified to be deregulated in developing brain of embryos by maternal diabetes, although the exact mechanism remains unknown. Recently, miRNAs have been shown to regulate genes involved in brain development and maturation. Therefore, we hypothesized that maternal diabetes alters the expression of miRNAs that regulate genes involved in biological pathways critical for neural tube development and closure during embryogenesis...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28794104/prenatal-hypoxia-and-placental-oxidative-stress-linkages-to-developmental-origins-of-cardiovascular-disease
#5
Mais M Aljunaidy, Jude S Morton, Christy-Lynn Cooke, Sandra T Davidge
Intrauterine growth restriction (IUGR, a pregnancy complication where the fetus does not reach its genetic growth potential) is a leading cause of fetal morbidity and mortality with a significant impact on population health. IUGR is associated with gestational hypoxia; which can lead to placental oxidative stress and fetal programming of cardiovascular disease. Mitochondria are a major source of placental oxidative stress and may provide a therapeutic target to mitigate the detrimental effects of placental oxidative stress on pregnancy outcomes...
August 9, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28758949/potential-new-non-invasive-therapy-using-artificial-oxygen-carriers-for-pre-eclampsia
#6
REVIEW
Hidenobu Ohta, Maiko Kaga, Heng Li, Hiromi Sakai, Kunihiro Okamura, Nobuo Yaegashi
The molecular mechanisms of pre-eclampsia are being increasingly clarified in animals and humans. With the uncovering of these mechanisms, preventive therapy strategies using chronic infusion of adrenomedullin, vascular endothelial growth factor-121 (VEGF-121), losartan, and sildenafil have been proposed to block narrow spiral artery formation in the placenta by suppressing related possible factors for pre-eclampsia. However, although such preventive treatments have been partly successful, they have failed in ameliorating fetal growth restriction and carry the risk of possible side-effects of drugs on pregnant mothers...
July 30, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28743956/post-hypoxia-invasion-of-the-fetal-brain-by-multidrug-resistant-staphylococcus
#7
Miguel A Zarate, Michelle D Rodriguez, Eileen I Chang, Jordan T Russell, Thomas J Arndt, Elaine M Richards, Beronica A Ocasio, Eva Aranda, Elizabeth M Gordon, Kevin Yu, Josef Neu, Maureen Keller-Wood, Eric W Triplett, Charles E Wood
Herein we describe an association between activation of inflammatory pathways following transient hypoxia and the appearance of the multidrug resistant bacteria Staphylococcus simulans in the fetal brain. Reduction of maternal arterial oxygen tension by 50% over 30 min resulted in a subseiuent significant over-expression of genes associated with immune responses 24 h later in the fetal brain. The activated genes were consistent with stimulation by bacterial lipopolysaccharide; an influx of macrophages and appearance of live bacteria were found in these fetal brains...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28737244/hypoxia-animal-experiments-and-clinical-implications
#8
Yasuyuki Kawagoe, Hiroshi Sameshima
The developing fetus has some unique physiological properties that differ from properties in extra-uterine life. The fetus exists in a hypoxemic condition as a result of the presence of the placenta, which serves as a limiting interface between maternal and fetal circulation. In addition, the fetus is prone to be exposed to uterine contractions, which place it under a further hypoxic burden. Thus, the fetal response to hypoxic insults is important. There has been marked progression in the understanding of fetal physiology since the introduction of the 'chronic preparation model'...
July 24, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28730459/fetal-programming-as-a-predictor-of-adult-health-or-disease-the-need-to-reevaluate-fetal-heart-function
#9
REVIEW
Joana O Miranda, Carla Ramalho, Tiago Henriques-Coelho, José Carlos Areias
Epidemiologic and experimental evidence suggests that adverse stimuli during critical periods in utero permanently alters organ structure and function and may have persistent consequences for the long-term health of the offspring. Fetal hypoxia, maternal malnutrition, or ventricular overloading are among the major adverse conditions that can compromise cardiovascular development in early life. With the heart as a central organ in fetal adaptive mechanisms, a deeper understanding of the fetal cardiovascular physiology and of the echocardiographic tools to assess both normal and stressed pregnancies would give precious information on fetal well-being and hopefully may help in early identification of special risk groups for cardiovascular diseases later in life...
July 20, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28730105/pigment-epithelium-derived-factor-protects-retinal-ganglion-cells-from-hypoxia-induced-apoptosis-by-preventing-mitochondrial-dysfunction
#10
Shu-Wei Tian, Yuan Ren, Jin-Zhi Pei, Bai-Chao Ren, Yuan He
AIM: To investigate the potential of pigment epithelium-derived factor (PEDF) to protect the immortalized rat retinal ganglion cells-5 (RGC-5) exposed to CoCl2-induced chemical hypoxia. METHODS: After being differentiated with staurosporine (SS), RGC-5 cells were cultured in four conditions: control group cells cultured in Dulbecco's modified eagle medium (DMEM) supplemented with 10% fetal bovine serum, 100 µmol/mL streptomycin and penicillin (named as normal conditions); hypoxia group cells cultured in DMEM containing 300 µmol/mL CoCl2; cells in the group protected by PEDF were first pretreated with 100 ng/mL PEDF for 2h and then cultured in the same condition as hypoxia group cells; and PEDF group cells that were cultured in the presence of 100 ng/mL PEDF under normal conditions...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28723885/term-versus-preterm-cord-blood-cells-for-the-prevention-of-preterm-brain-injury
#11
Jingang Li, Tamara Yawno, Amy Sutherland, Jan Loose, Ilias Nitsos, Beth J Allison, Robert Bischof, Courtney A McDonald, Graham Jenkin, Suzanne L Miller
BACKGROUND: White matter brain injury in preterm infants can induce neurodevelopmental deficits. Umbilical cord blood (UCB) cells demonstrate neuroprotective properties, but it is unknown whether cells obtained from preterm versus term cord blood have similar efficacy. This study compared the ability of term cord blood (TCB) versus preterm cord blood (PCB) cells to reduce white matter injury in preterm fetal sheep. METHODS: Hypoxia-ischemia (HI) was induced in fetal sheep (0...
July 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28710827/comparison-of-non-coding-rnas-in-exosomes-and-functional-efficacy-of-human-embryonic-stem-cell-versus-induced-pluripotent-stem-cell-derived-cardiomyocytes
#12
Won Hee Lee, Wenyi Chen, Ning-Yi Shao, Dan Xiao, Xulei Qin, Natalie Baker, Hye Ryeong Michelle Bae, Praveen Shukla, Haodi Wu, Kazuki Kodo, Sang-Ging Ong, Joseph C Wu
BACKGROUND: Both human embryonic stem cell-derived cardiomyocytes (ESC-CMs) and human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) can serve as unlimited cell sources for cardiac regenerative therapy. However, the functional equivalency between human ESC-CMs and iPSC-CMs for cardiac regenerative therapy has not been demonstrated. Here we performed a head-to-head comparison of ESC-CMs and iPSC-CMs in their ability to restore cardiac function in a rat myocardial infarction (MI) model as well as their exosomal secretome...
July 14, 2017: Stem Cells
https://www.readbyqxmd.com/read/28694195/hemoglobins-emerging-roles-in-mental-disorders-metabolical-genetical-and-immunological-aspects
#13
REVIEW
Meric A Altinoz, Bahri Ince
Hemoglobin (Hb) expression in the central nervous system is recently shown. Cooccurences of mental disorders (mainly bipolar disorder (BD) and tic disorders) with β- or α-thalassemia trait or erythrocytosis were witnessed, which may be due to peripheral or central hypoxia/hyperoxia or haplotypal gene interactions. β-Globin genes reside at 11p15.5 close to tyrosine hydroxylase, dopamine receptor DRD4 and Brain Derived Neurotrophic Factor, which involve in psychiatric diseases. α-Globin genes reside at 16p13...
July 8, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28680565/oxidative-injury-of-the-pulmonary-circulation-in-the-perinatal-period-short-and-long-term-consequences-for-the-human-cardiopulmonary-system
#14
Daphne P de Wijs-Meijler, Dirk J Duncker, Dick Tibboel, Ralph T Schermuly, Norbert Weissmann, Daphne Merkus, Irwin K M Reiss
Development of the pulmonary circulation is a complex process with a spatial pattern that is tightly controlled. This process is vulnerable for disruption by various events in the prenatal and early postnatal periods. Disruption of normal pulmonary vascular development leads to abnormal structure and function of the lung vasculature, causing neonatal pulmonary vascular diseases. Premature babies are especially at risk of the development of these diseases, including persistent pulmonary hypertension and bronchopulmonary dysplasia...
March 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28679680/chronic-hypoxia-alters-maternal-uterine-and-fetal-hemodynamics-in-the-term-pregnant-guinea-pig
#15
Shifa Turan, Graham W Aberdeen, Loren P Thompson
Placental hypoxia is associated with maternal hypertension, placental insufficiency and fetal growth restriction. In the pregnant guinea pig, prenatal hypoxia during early gestation inhibits cytotrophoblast invasion of spiral arteries, increases maternal blood pressure and induces fetal growth restriction. This study evaluated the impact of chronic maternal hypoxia on fetal heart structure with 4D echocardiography with spatio-temporal image correlation and tomographic ultrasound (STIC-TUI) and uterine and umbilical artery resistance/pulsatility indices and fetal heart function using pulsed wave Doppler ultrasound...
July 5, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28656697/hypoxia-ischemia-is-not-an-antecedent-of-most-preterm-brain-damage-the-illusion-of-validity
#16
REVIEW
Floyd Gilles, Pierre Gressens, Olaf Dammann, Alan Leviton
Brain injury in preterm newborn infants is often attributed to hypoxia-ischemia even when neither hypoxia nor ischemia is documented, and many causative speculations are based on the same assumption. We review human and animal study contributions with their strengths and limitations, and conclude that - despite all the work done in human fetal neuropathology and developmental models in animals - the evidence remains unconvincing that hypoxemia, in the fetus or newborn infant, contributes appreciably to any encephalopathy of prematurity...
June 28, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28648041/-effects-of-hypoxia-on-the-phenotype-transformation-of-human-dermal-fibroblasts-to-myofibroblasts-and-the-mechanism
#17
B Zhao, F Han, W Zhang, X J Wang, J Zhang, F F Yang, J H Shi, L L Su, D H Hu
Objective: To investigate the effects of hypoxia on the phenotype transformation of human dermal fibroblasts to myofibroblasts and the mechanism. Methods: The third passage of healthy adult human dermal fibroblasts in logarithmic phase were cultured in DMEM medium containing 10% fetal bovine serum for the following five experiments. (1) In experiments 1, 2, and 3, cells were divided into normoxia group and hypoxia group according to the random number table, with 10 dishes in each group. Cells of normoxia group were cultured in incubator containing 21% oxygen, while those of hypoxia group with 1% oxygen...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28637870/cardiac-myocyte-p38%C3%AE-kinase-regulates-angiogenesis-via-myocyte-endothelial-cell-cross-talk-during-stress-induced-remodeling-in-the-heart
#18
Beth A Rose, Tomohiro Yokota, Vishnu Chintalgattu, Shuxun Ren, Luisa Iruela-Arispe, Aarif Y Khakoo, Susumu Minamisawa, Yibin Wang
Stress-induced p38 mitogen-activated protein kinase (MAPK) activity is implicated in pathological remodeling in the heart. For example, constitutive p38 MAPK activation in cardiomyocytes induces pathological features, including myocyte hypertrophy, apoptosis, contractile dysfunction, and fetal gene expression. However, the physiological function of cardiomyocyte p38 MAPK activity in beneficial compensatory vascular remodeling is unclear. This report investigated the functional role and the underlying mechanisms of cardiomyocyte p38 MAPK activity in cardiac remodeling induced by chronic stress...
August 4, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28632735/validity-of-a-minimally-invasive-autopsy-for-cause-of-death-determination-in-stillborn-babies-and-neonates-in-mozambique-an-observational-study
#19
Clara Menendez, Paola Castillo, Miguel J Martínez, Dercio Jordao, Lucilia Lovane, Mamudo R Ismail, Carla Carrilho, Cesaltina Lorenzoni, Fabiola Fernandes, Tacilta Nhampossa, Juan Carlos Hurtado, Mireia Navarro, Isaac Casas, Paula Santos Ritchie, Sonia Bandeira, Sibone Mocumbi, Zara Jaze, Flora Mabota, Khátia Munguambe, Maria Maixenchs, Ariadna Sanz, Inacio Mandomando, Alfons Nadal, Anna Goncé, Carmen Muñoz-Almagro, Llorenç Quintó, Jordi Vila, Eusebio Macete, Pedro Alonso, Jaume Ordi, Quique Bassat
BACKGROUND: Over 5 million stillbirths and neonatal deaths occur annually. Limited and imprecise information on the cause of these deaths hampers progress in achieving global health targets. Complete diagnostic autopsies (CDAs)-the gold standard for cause of death determination-are difficult to perform in most high-burden settings. Therefore, validation of simpler and more feasible methods is needed. METHODS AND FINDINGS: In this observational study, the validity of a minimally invasive autopsy (MIA) method in determining the cause of death was assessed in 18 stillbirths and 41 neonatal deaths by comparing the results of the MIA with those of the CDA...
June 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28626870/the-chicken-or-the-egg-sildenafil-therapy-for-fetal-cardiovascular-dysfunction-during-hypoxic-development-studies-in-the-chick-embryo
#20
Ryan T Sless, Nathaniel E Hayward, Paul M Ryan
No abstract text is available yet for this article.
June 19, 2017: Journal of Physiology
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