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systolic functions in neonates

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https://www.readbyqxmd.com/read/29223466/long-term-pulmonary-and-cardiovascular-morbidities-of-neonatal-hyperoxia-exposure-in-mice
#1
Renuka T Menon, Amrit Kumar Shrestha, Corey L Reynolds, Roberto Barrios, Binoy Shivanna
Pulmonary hypertension (PH) frequently occurs in infants with bronchopulmonary dysplasia (BPD), causing increased mortality and right ventricular (RV) dysfunction that persists into adulthood. A first step in developing better therapeutic options is identifying and characterizing an appropriate animal model. Previously, we characterized the short-term morbidities of a model in which C57BL/6J wild-type (WT) mice were exposed to 70% O2 (hyperoxia) during the neonatal period. Here, we aimed to determine the long-term morbidities using lung morphometry, echocardiography (Echo), and cardiac magnetic resonance imaging (cMRI)...
December 7, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29213350/immediate-early-response-gene-x-1-iex-1-mediates-ischemic-preconditioning-induced-cardioprotection-in-rats
#2
Ming-Jiang Xu, Yan Cai, Aijuan Qu, John Y-J Shyy, Wenjing Li, Xian Wang
Reversible myocardial ischemia/reperfusion (I/R) or ischemic preconditioning (IPC) is associated with an immediate genomic response; IPC-induced immediate early genes are associated with reduced infarct size. Because the immediate early response gene X-1 (IEX-1) plays a central role in cell apoptosis, we examine whether IEX-1 exerts protective effects against I/R injury. We found that the IEX-1 mRNA level was increased in the IPC-imposed rat heart. However, it was downregulated in the I/R rat heart, which was prevented by in situ IPC...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29153568/maternal-obesity-and-cardiac-development-in-the-offspring-study-in-human-neonates-and-minipigs
#3
Maria Angela Guzzardi, Tiziana Liistro, Luna Gargani, Lamia Ait Ali, Gennaro D'Angelo, Silvia Rocchiccioli, Federica La Rosa, Alessandra Kemeny, Elena Sanguinetti, Nadia Ucciferri, Mariarosaria De Simone, Antonietta Bartoli, Pierluigi Festa, Piero A Salvadori, Silvia Burchielli, Rosa Sicari, Patricia Iozzo
OBJECTIVES: The aim of this study was to investigate the consequences of maternal overweight on cardiac development in offspring in infants (short term) and minipigs (short and longer term). BACKGROUND: The epidemic of overweight involves pregnant women. The uterine environment affects organ development, modulating disease susceptibility. Offspring of obese mothers have higher rates of cardiovascular events and mortality. METHODS: Echocardiography was performed in infants born to lean and overweight mothers at birth and at 3, 6, and 12 months of age...
November 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29136712/-long-term-outcome-and-prognostic-factors-in-pregnant-women-with-pulmonary-arterial-hypertension-associated-with-congenital-heart-disease
#4
Q T Ou, J K Lu, J Zhang, Y Chen, Q Li, J L Zhang
Objective: To investigate the perinatal outcome, risk factors and long-term outcome of pregnancy complicated with pulmonary arterial hypertension(PAH) and congenital heart diseases (CHD). Methods: Clinical data of 110 pregnant women who were diagnosed as PAH-CHD were retrospectively analyzed in the Department of Obstetrics and Gynecology and Surgical Intensive Care Unit at Beijing Anzhen Hospital from 2004 to 2013. The survival and treatment status were followed up. Results: 110 subjects consisted of 11 mild PAH, 33 moderate and 66 severe ones...
November 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/29127236/structural-and-functional-changes-of-the-pulmonary-vasculature-after-hypoxia-exposure-in-the-neonatal-period-a-new-swine-model-of-pulmonary-vascular-disease
#5
Daphne P M de Wijs-Meijler, Richard W B van Duin, Dirk J Duncker, Urs Scherrer, Claudio Sartori, Irwin K M Reiss, Daphne Merkus
Pulmonary vascular disease (PVD) represents an underestimated and increasing clinical burden in the neonatal period, but also later in life, when exercise-tolerance is decreased. Animal models performing long-term follow-up after a perinatal insult are lacking. This study aimed to develop and characterize a neonatal swine model with hypoxia-induced PVD, during long-term follow-up after re-exposure to normoxia, and to investigate the exercise response in this model. Piglets were exposed to a normoxic (N=10) or hypoxic environment (N=9) for four weeks...
November 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29120452/vascular-aging-and-cardiac-maladaptation-in-growth-restricted-preterm-infants
#6
A Sehgal, B J Allison, S M Gwini, S Menahem, S L Miller, G R Polglase
OBJECTIVE: To assess arterial morphology and mechanics in preterm infants with fetal growth restriction (FGR) compared with those appropriate for gestational age (AGA) in the early neonatal period. STUDY DESIGN: This observational study involved 20 preterm FGR infants (28 to 32 weeks) of gestational age (GA) and birth weight (BW) <10th centile and 20 preterm AGA infants. Vascular ultrasound was performed to measure aortic properties. RESULTS: GA and BW of FGR and AGA infants were 29...
November 9, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29118720/altered-right-ventricular-mechanical-properties-are-afterload-dependent-in-a-rodent-model-of-bronchopulmonary-dysplasia
#7
Jitandrakumar R Patel, Gregory P Barton, Rudolf K Braun, Kara N Goss, Kristin Haraldsdottir, Alexandria Hopp, Gary Diffee, Timothy A Hacker, Richard L Moss, Marlowe W Eldridge
Infants born premature are at increased risk for development of bronchopulmonary dysplasia (BPD), pulmonary hypertension (PH), and ultimately right ventricular (RV) dysfunction, which together carry a high risk of neonatal mortality. However, the role alveolar simplification and abnormal pulmonary microvascular development in BPD affects RV contractile properties is unknown. We used a rat model of BPD to examine the effect of hyperoxia-induced PH on RV contractile properties. We measured in vivo RV pressure as well as passive force, maximum Ca(2+) activated force, calcium sensitivity of force (pCa50) and rate of force redevelopment (ktr) in RV skinned trabeculae isolated from hearts of 21-and 35-day old rats pre-exposed to 21% oxygen (normoxia) or 85% oxygen (hyperoxia) for 14 days after birth...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29115861/postnatal-overnutrition-affects-metabolic-and-vascular-function-reflected-by-physiological-and-histological-changes-in-the-aorta-of-adult-wistar-rats
#8
Gerardo Sánchez-García, Laura Del Bosque-Plata, Enrique Hong
Rigorous nutritional care during early life leads to healthy adulthood. Cardiovascular and metabolic disorders, the most prevalent clinical challenges worldwide, are epidemiologically linked to poor nutritional habits throughout life. We aimed to understand whether postnatal overnutrition (PO) initiated during lactation affects metabolic markers and vascular function later in life. To test this hypothetical effect, we studied a PO Wistar rat model based on adjusting litter size at the third day of age to three pups and eight for the control group (C)...
November 8, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29081323/cardiovascular-adaptation-to-extrauterine-life-after-intrauterine-growth-restriction
#9
Luciana Rodriguez-Guerineau, Miriam Perez-Cruz, María D Gomez Roig, Francisco J Cambra, Juan Carretero, Fredy Prada, Olga Gómez, Fátima Crispi, Joaquim Bartrons
Introduction The adaptive changes of the foetal heart in intrauterine growth restriction can persist postnatally. Data regarding its consequences for early circulatory adaptation to extrauterine life are scarce. The aim of this study was to assess cardiac morphometry and function in newborns with late-onset intrauterine growth restriction to test the hypothesis that intrauterine growth restriction causes cardiac shape and functional changes at birth. METHODS: A comprehensive echocardiographic study was performed in 25 neonates with intrauterine growth restriction and 25 adequate-for-gestational-age neonates...
October 30, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/29081179/-transplantation-of-cardiac-stem-cells-overexpressing-integrin-linked-kinase-improves-cardiac-function-in-a-rat-model-of-acute-myocardial-infarction
#10
J J Li, Y Liu, J Zhao, A Y Li, D M Wang
Objective: To investigate the effect of cardiac stem cells (CSC) overexpressing integrin-linked kinase (ILK-CSC) transplantation on cardiac function after myocardial infarction (MI) and related mechanism. Methods: CSCs were isolated from the hearts of neonatal Sprague-Dawley (SD) rats and ILK-CSC were established by transfecting recombinant adenoviral vector harboring human wild-type ILK cDNA. Forty 8-week-old rats were randomly divided into 4 groups (n=10 each group): sham group, MI plus saline injection group(saline group), MI plus CSC transfected with null vector injection group (Ad-null-CSC group), and MI plus ILK-CSC injection group(ILK-CSC group)...
October 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29045568/loss-of-protein-kinase-novel-1-pkn1-is-associated-with-mild-systolic-and-diastolic-contractile-dysfunction-increased-phospholamban-thr17-phosphorylation-and-exacerbated-ischaemia-reperfusion-injury
#11
Asvi A Francois, Kofo Obasanjo-Blackshire, James E Clark, Andrii Boguslavskyi, Mark R Holt, Peter Parker, Michael S Marber, Richard J Heads
Aims: PKN1 is a stress-responsive protein kinase acting downstream of small GTP-binding proteins of the Rho/Rac family. The aim was to determine its role in endogenous cardioprotection. Methods and Results: Hearts from PKN1 knockout (KO) or wild type (WT) littermate control mice were perfused in Langendorff mode and subjected to global ischemia and reperfusion (I/R). Myocardial infarct size was doubled in PKN1 KO hearts compared to WT hearts. PKN1 was basally phosphorylated on the activation loop Thr778 PDK1 target site which was unchanged during I/R...
October 16, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28973759/down-klinefelter-syndrome-48-xxy-21-in-a-neonate-associated-with-congenital-heart-disease
#12
M A Rodrigues, L F Morgade, L F A Dias, R V Moreira, P D Maia, A F H Sales, P D Ribeiro
Double aneuploidy is considered a rare phenomenon. Herein, we describe a case of double aneuploidy 48,XXY,+21 in a neonate with congenital heart defects. The 28-day-old neonate male (23-year-old mother and 24-year-old father) was admitted to a neonatal intensive care unit owing to congenital heart disease. Echocardiography showed a complete atrioventricular septal defect with Rastelli type B and significant left ventricular failure, moderate atrioventricular valve regurgitation, right-sided heart failure, and preserved systolic function...
September 27, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28954269/the-impact-of-maternal-gestational-hypertension-and-the-use-of-anti-hypertensives-on-neonatal-myocardial-performance
#13
Colm R Breatnach, Cathy Monteith, Lisa McSweeney, Elizabeth C Tully, Fergal D Malone, Etaoin Kent, Anne Doherty, Orla Franklin, Afif El-Khuffash
BACKGROUND: Assessment of myocardial performance in neonates using advanced techniques such as deformation imaging and rotational mechanics has gained considerable interest. The applicability of these techniques for elucidating abnormal myocardial performance in various clinical scenarios is becoming established. We hypothesise that term infants born to mothers with gestational hypertension (GH) may experience impaired performance of the left and right ventricles during the early neonatal period...
September 28, 2017: Neonatology
https://www.readbyqxmd.com/read/28841738/aucubin-protects-against-tgf%C3%AE-1-induced-cardiac-fibroblasts-activation-by-mediating-the-ampk%C3%AE-mtor-signaling-pathway
#14
Yang Xiao, Wei Chang, Qing-Qing Wu, Xiao-Han Jiang, Ming-Xia Duan, Ya-Ge Jin, Qi-Zhu Tang
Fibrosis is a key feature of various cardiovascular diseases and compromises cardiac systolic and diastolic performance. The lack of effective anti-fibrosis drugs is a major contributor to the increasing prevalence of heart failure. The present study was performed to investigate whether the iridoid aucubin alleviates cardiac fibroblast activation and its underlying mechanisms. Neonatal rat cardiac fibroblasts were incubated with aucubin (1, 10, 20, 50 µM) followed by transforming growth factor β1 (TGFβ1, 10 ng/mL) stimulation for 24 h...
August 25, 2017: Planta Medica
https://www.readbyqxmd.com/read/28743382/preoperative-echocardiographic-measures-of-left-ventricular-mechanics-are-associated-with-postoperative-vasoactive-support-in-preterm-infants-undergoing-patent-ductus-arteriosus-ligation
#15
Margaret A Gray, Eric M Graham, Andrew M Atz, Scott M Bradley, Minoo N Kavarana, Shahryar M Chowdhury
OBJECTIVE: Preoperative risk factors associated with poor outcomes after patent ductus arteriosus ligation in preterm infants have not been well defined. The aim of this study was to determine the association between preoperative echocardiographic measures of left ventricular mechanics and postoperative clinical outcomes after patent ductus arteriosus ligation. METHODS: Preterm infants less than 90 days of age with no other significant congenital anomalies who underwent patent ductus arteriosus ligation between 2007 and 2015 were considered for retrospective analysis...
December 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28683514/endocardial-fibroelastosis-of-the-left-ventricle-affects-right-ventricular-performance-in-fetuses-with-hypoplastic-left-heart-syndrome-a-prospective-study-using-m-mode-pw-and-tissue-doppler-techniques
#16
Oliver Graupner, Christian Enzensberger, Larissa Wieg, Jan Degenhardt, Aline Wolter, Markus Khalil, Dietmar Schranz, Can Yerebakan, Astrid Doelle, Johannes Herrmann, Roland Axt-Fliedner
Purpose Myocardial function (MF) of the systemic right ventricle (RV) influences the postnatal course of neonates with hypoplastic left heart syndrome (HLHS). Our study examines whether the presence of endocardial fibroelastosis of the left ventricle (LV EFE) influences MF of the RV in HLHS fetuses. Materials and Methods A prospective study was conducted including 10 controls (group 1), 10 HLHS fetuses with (group 2) and 10 without LV EFE (group 3) - all matched for gestational age. M-mode was used to assess tricuspid plane systolic excursion (TAPSE) and the shortening fraction (SF)...
July 6, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28670382/stretch-activated-channel-piezo1-is-up-regulated-in-failure-heart-and-cardiomyocyte-stimulated-by-angii
#17
Jianlin Liang, Boshui Huang, Guiyi Yuan, Ying Chen, Fasheng Liang, Huayuan Zeng, Shaoxin Zheng, Liang Cao, Dengfeng Geng, Shuxian Zhou
Mechanotransduction is the conversion of extracellular mechanical stimuli into intracellular biochemical signals, and plays an important role in heart responses to its own mechanical environment. Piezo1 as a distinct stretch-activated channel (SAC) in mammal involves in not only vascular remodeling during embryonic development but also arterial remodeling upon to hypertension at adult stage. In the present study, the expression of Piezo1 was up-regulated in failure heart induced by myocardial infarction (MI) by real-time PCR, Western blot and immunohistochemistry analysis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28665930/kidneys-in-5-year-old-preterm-born-children-a-longitudinal-cohort-monitoring-of-renal-function
#18
Rachel Vieux, Marion Gerard, Audrey Roussel, Aïssata Sow, Amelie Gatin, Francis Guillemin, Jean-Michel Hascoet
BackgroundBeing aware of the impact of low birth weight on late-onset hypertension, our aim was to describe systolic blood pressure (sBP) and renal function in 3-5-year-old preterm-born children and to determine which perinatal factors or childhood factors were associated with an altered renal function at 5 years in these children.MethodsThis was a prospective longitudinal cohort study of children born at 27-31 weeks of gestation and included at birth and examined at 3, 4, and 5 years of age. The primary outcome was renal function at 5 years: BP, estimated glomerular filtration rate, and albuminuria...
December 2017: Pediatric Research
https://www.readbyqxmd.com/read/28662946/cardiac-morphology-and-function-in-preterm-growth-restricted-infants-relevance-for-clinical-sequelae
#19
Arvind Sehgal, Beth J Allison, Stella M Gwini, Suzanne L Miller, Graeme R Polglase
OBJECTIVES: To assess cardiac morphology and function in preterm infants with fetal growth restriction (FGR) compared with an appropriate for gestational age cohort, and to ascertain clinical correlation with neonatal sequelae. STUDY DESIGN: With informed consent, 20 infants born between 28 and 32 weeks of gestational age and birthweight (BW) <10th percentile were compared using conventional and tissue Doppler echocardiography with 20 preterm appropriate for gestational age infants...
September 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28590293/pediatric-pulmonary-arterial-hypertension-on-the-eve-of-growing-up
#20
Johannes M Douwes, Rolf M F Berger
PURPOSE OF REVIEW: Current recommendations for diagnosis and treatment of pulmonary arterial hypertension (PAH) during childhood are expert opinion based, because of lacking pediatric data. In recent years, however, important pediatric data have emerged on PAH. RECENT FINDINGS: PAH in children shows similarities as well as differences compared to adults. Neonates and children know specific clinical presentations and a hemodynamic profile that differs from adults with PAH...
September 2017: Current Opinion in Pulmonary Medicine
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