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https://www.readbyqxmd.com/read/28411000/meconium-aspiration-or-respiratory-distress-associated-with%C3%A2-meconium-stained-amniotic-fluid
#1
REVIEW
Nestor E Vain, Daniel G Batton
The designation meconium aspiration syndrome (MAS) reflects a spectrum of disorders in infants born with meconium-stained amniotic fluid, ranging from mild tachypnea to severe respiratory distress and significant mortality. The frequency of MAS is highest among infants with post-term gestation, thick meconium, and birth asphyxia. Pulmonary hypertension is an important component in severe cases. Prenatal hypopharyngeal suctioning and postnatal endotracheal intubation and suctioning of vigorous infants are not effective...
April 11, 2017: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28399868/4-5-4-trihydroxychalcone-8-8-ethene-1-2-diyl-dinaphtalene-1-4-5-triol-and-rutin-from-gynura-segetum-inhibit-phagocytosis-lymphocyte-proliferation-cytokine-release-and-nitric-oxide-production-from-phagocytic-cells
#2
Yuandani, Ibrahim Jantan, Khairana Husain
BACKGROUND: Gynura segetum is used traditionally to treat various ailments related to the immune system, which include cancer, inflammation, rheumatism, diabetes, hypertension, and viral infections but little studies have been carried out to validate their ethnopharmacological aspects. In this study the immunosuppressive effects of G. segetum and its constituents were investigated. METHODS: Isolation of compounds from G. segetum leaves was conducted using vacuum liquid chromatography (VLC) and column chromatography (CC)...
April 11, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28389034/nitric-oxide-a-new-possible-biomarker-in-heart-failure-relationship-with-pulmonary-hypertension-secondary-to-left-heart-failure
#3
Roberto Jorge Bonafede, Juan Pablo Calvo, Julia María Valeria Fausti, Sonia Puebla, Adolfo Juan Gambarte, Walter Manucha
Heart failure (HF) is a growing medical problem and it is of interest to study new biomarkers for better characterisation. In this sense, nitric oxide, reactive oxygen species (ROS), NADPH, and superoxide dismutase (SOD) were evaluated, along with their possible predictive value in patients with HF. An analysis was also performed on the potential differences between patients with and without secondary pulmonary hypertension (SPH), considered to have a worse prognosis. A significant decrease of nitric oxide and SOD was noted in HF, whereas ROS and NADPH were increased...
April 5, 2017: Clínica e Investigación en Arteriosclerosis
https://www.readbyqxmd.com/read/28356289/sex-specific-computational-models-of-the-spontaneously-hypertensive-rat-kidneys-factors-affecting-nitric-oxide-bioavailability
#4
Ying Chen, Jennfier C Sullivan, Aurélie Edwards, Anita T Layton
The goals of this study were to (i) develop a computational model of solute transport and oxygenation in the kidney of the female spontaneously hypertensive rat (SHR), and (ii) apply that model to investigate sex differences in nitric oxide (NO) levels in SHR and their effects on medullary oxygenation and oxidative stress. To accomplish these goals, we first measured NO synthase (NOS) NOS1 and NOS3 protein expression levels in the renal microvessels of male and female SHR. We found that the expression of both NOS1 and NOS3 is higher in the renal vasculature of females compared to males...
March 29, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28338370/the-potential-of-stimulating-nitric-oxide-formation-in-the-treatment-of-hypertension
#5
Lucas C Pinheiro, Jose E Tanus-Santos, Michele M Castro
Hypertension is a leading cause of morbidity and mortality worldwide. A major pathophysiological factor contributing to hypertension is reduced nitric oxide (NO) bioavailability. Strategies to address this pathophysiological mechanism could offer significant advantages. Areas covered: In this review we aimed at examining a variety of drugs (statins, beta-adrenergic receptor blockers, calcium channel blockers, angiotensin converting enzyme inhibitors, angiotensin II type-1 receptor blockers) used to treat hypertension and other cardiovascular diseases, particularly with respect to their potential of increasing NO bioavailability and activity in the cardiovascular system...
March 30, 2017: Expert Opinion on Therapeutic Targets
https://www.readbyqxmd.com/read/28331629/congenital-diaphragmatic-hernia-a-review
#6
REVIEW
Praveen Kumar Chandrasekharan, Munmun Rawat, Rajeshwari Madappa, David H Rothstein, Satyan Lakshminrusimha
Congenital Diaphragmatic hernia (CDH) is a condition characterized by a defect in the diaphragm leading to protrusion of abdominal contents into the thoracic cavity interfering with normal development of the lungs. The defect may range from a small aperture in the posterior muscle rim to complete absence of diaphragm. The pathophysiology of CDH is a combination of lung hypoplasia and immaturity associated with persistent pulmonary hypertension of newborn (PPHN) and cardiac dysfunction. Prenatal assessment of lung to head ratio (LHR) and position of the liver by ultrasound are used to diagnose and predict outcomes...
2017: Maternal Health, Neonatology and Perinatology
https://www.readbyqxmd.com/read/28252041/protective-effects-of-nebivolol-from-oxidative-stress-to-prevent-hypertension-related-target-organ-damage
#7
REVIEW
A Coats, S Jain
Hypertension is one of the leading risk factors for morbidity and mortality in patients with cardiovascular and cerebrovascular diseases and renal impairment. It also leads to target organ damage (TOD), which worsens organ function and the patient's clinical status. Reactive oxygen species (ROS)-mediated oxidative stress may contribute significantly to TOD in patients with hypertension. NO (nitric oxide) is a paracrine factor derived from endothelial cells that has been shown to alleviate ROS-mediated oxidative damage...
March 2, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28248201/intravascular-hemolysis-and-the-pathophysiology-of-sickle-cell-disease
#8
REVIEW
Gregory J Kato, Martin H Steinberg, Mark T Gladwin
Hemolysis is a fundamental feature of sickle cell anemia that contributes to its pathophysiology and phenotypic variability. Decompartmentalized hemoglobin, arginase 1, asymmetric dimethylarginine, and adenine nucleotides are all products of hemolysis that promote vasomotor dysfunction, proliferative vasculopathy, and a multitude of clinical complications of pulmonary and systemic vasculopathy, including pulmonary hypertension, leg ulcers, priapism, chronic kidney disease, and large-artery ischemic stroke. Nitric oxide (NO) is inactivated by cell-free hemoglobin in a dioxygenation reaction that also oxidizes hemoglobin to methemoglobin, a non-oxygen-binding form of hemoglobin that readily loses heme...
March 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28214691/dlitiazem-inhibits-the-oxidative-stress-induced-by-angiotensin-ii-through-growth-hormone-secretagogue-receptor-type-1a-in-human-umbilicus-vein-endothelial-cells
#9
Lingyun Zhou, Meng Yang, Shanru Zuo, Xiaofeng Guan, Jianglin Wang, Qingjie Chen, Xiaocong Zuo, Sujie Jia, Ren Guo
Diltiazem has been used for post-transplant hypertension, but the mechanism underlying its protective effect of endothelial cells against angiotensin II (Ang II) - induced impairment remains unclear. Human umbilicus vein endothelial cells (HUVECs) were cultured and divided into seven groups: control, Ang II (10(-6)M), diltiazem (10(-6)M), [D-Lys3]-GHRP-6(25μM), diltiazem (10(-6)M)+Ang II (10(-6)M), losartan (10(-6)M)+Ang II (10(-6)M), [D-Lys3]-GHRP-6 (25μM) + Dil(10(-6)M)+Ang II (10(-6)M) groups. Nitric oxide (NO) production, intracellular reactive oxygen species (ROS) levels, protein and mRNA expressions of endothelial nitric oxide synthase (eNOS) and p47 phox subunit of NADPH were evaluated...
February 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28209797/roles-of-vascular-oxidative-stress-and-nitric-oxide-in-the-pathogenesis-of-atherosclerosis
#10
REVIEW
Ulrich Förstermann, Ning Xia, Huige Li
Major reactive oxygen species (ROS)-producing systems in vascular wall include NADPH (reduced form of nicotinamide adenine dinucleotide phosphate) oxidase, xanthine oxidase, the mitochondrial electron transport chain, and uncoupled endothelial nitric oxide (NO) synthase. ROS at moderate concentrations have important signaling roles under physiological conditions. Excessive or sustained ROS production, however, when exceeding the available antioxidant defense systems, leads to oxidative stress. Animal studies have provided compelling evidence demonstrating the roles of vascular oxidative stress and NO in atherosclerosis...
February 17, 2017: Circulation Research
https://www.readbyqxmd.com/read/28155616/crosstalk-between-oxidative-and-nitrosative-stress-and-arterial-stiffness
#11
Ioana Mozos, Constantin Tudor Luca
Arterial stiffness, the expression of reduced arterial elasticity, is an effective predictor of cardiovascular disorders. Oxidative stress is an imbalance between exposure to toxic reactive oxygen species (ROS) and antioxidant systems. The increase in reactive nitrogen species (RNS) is termed nitrosative stress. We review the main mechanisms and products linking arterial stiffness with oxidative and nitrosative stress in several disorders, focusing on recent experimental and clinical data, and the mechanisms explaining benefits of antioxidant therapy...
February 1, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28150849/from-thrombosis-to-fibrosis-in-chronic-thromboembolic-pulmonary-hypertension
#12
Magdalena L Bochenek, Nico S Rosinus, Mareike Lankeit, Lukas Hobohm, Felix Bremmer, Eva Schütz, Frederikus A Klok, Sven Horke, Christoph B Wiedenroth, Thomas Münzel, Irene M Lang, Eckhard Mayer, Stavros Konstantinides, Katrin Schäfer
The pathomechanisms underlying the development of thrombofibrotic pulmonary artery occlusions in Chronic Thromboembolic Pulmonary Hypertension (CTEPH) are largely unknown. The aim of this study was to allocate distinct cellular processes playing a role in thrombus resolution, such as inflammation, hypoxia, proliferation, apoptosis and angiogenesis, to different stages of thrombofibrotic remodelling. A total of 182 pulmonary endarterectomy (PEA) specimens were collected from 31 CTEPH patients. To facilitate co-localisation, Tissue MicroArrays were prepared and processed for (immuno)-histochemistry and confocal fluorescence microscopy...
April 3, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28116728/isolation-and-culture-of-endothelial-cells-from-large-vessels
#13
Augusto C Montezano, Karla B Neves, Rheure A M Lopes, Francisco Rios
The endothelium, which is at the interface between circulating blood and the vascular wall, comprises a simple squamous layer of cells that lines the inner surface of all blood vessels. Endothelial cells are highly metabolically active and play an important role in many physiological functions, including control of vasomotor tone, blood cell trafficking, vascular permeability, and maintenance of vascular integrity (Mensah, Vascul Pharmacol 46(5):310-314, 2007; Yetik-Anacak and Catravas, Vascul Pharmacol 45(5):268-276, 2006)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28099979/milrinone-pharmacokinetics-and-pharmacodynamics-in-neonates-with-persistent-pulmonary-hypertension-of-the-newborn
#14
Annie Giaccone, Athena F Zuppa, Beena Sood, Meryl S Cohen, Michael L O'Byrne, Ganesh Moorthy, Amit Mathur, Haresh Kirpalani
Objective To describe the pharmacokinetics and pharmacodynamics of milrinone in infants with persistent pulmonary hypertension of the newborn (PPHN) and to explore the impact of age on milrinone disposition. Design Randomized, open label pilot study. Setting Multicenter; level 3 and level 4 neonatal intensive care units. Patients Six infants ≥34 weeks' gestational age and <10 days of life with persistent hypoxemia receiving inhaled nitric oxide. Intervention Intravenous milrinone lactate in one of two dosing regimens: (1) low dose, 20 mcg/kg bolus followed by 0...
January 18, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28090285/pulmonary-vascular-and-ventricular-dysfunction-in-the-susceptible-patient-2015-grover-conference-series
#15
REVIEW
Bradley A Maron, Roberto F Machado, Larissa Shimoda
Pulmonary blood vessel structure and tone are maintained by a complex interplay between endogenous vasoactive factors and oxygen-sensing intermediaries. Under physiological conditions, these signaling networks function as an adaptive interface between the pulmonary circulation and environmental or acquired perturbations to preserve oxygenation and maintain systemic delivery of oxygen-rich hemoglobin. Chronic exposure to hypoxia, however, triggers a range of pathogenetic mechanisms that include hypoxia-inducible factor 1α (HIF-1α)-dependent upregulation of the vasoconstrictor peptide endothelin 1 in pulmonary endothelial cells...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28087333/nicotinamide-nucleotide-transhydrogenase-activity-impacts-mitochondrial-redox-balance-and-the-development-of-hypertension-in-mice
#16
Igor Leskov, Amber Neville, Xinggui Shen, Sibile Pardue, Christopher G Kevil, D Neil Granger, David M Krzywanski
Oxidant stress contributes to the initiation and progression of hypertension (HTN) by enhancing endothelial dysfunction and/or causing perturbations in nitric oxide homeostasis. Differences in mitochondrial function may augment this process and provide insight into why age of onset and clinical outcomes differ among individuals from distinct ethnic groups. We have previously demonstrated that variation in normal mitochondrial function and oxidant production exists in endothelial cells from individuals of Caucasian and African-American ethnicity and that this variation contributes to endothelial dysfunction...
December 16, 2016: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28077855/the-nox2-derived-reactive-oxygen-species-damaged-endothelial-nitric-oxide-system-via-suppressed-bkca-skca-in-preeclampsia
#17
Jie Chen, Qinqin Gao, Lin Jiang, Xueqin Feng, Xiaolin Zhu, Xiaorong Fan, Caiping Mao, Zhice Xu
The endothelial nitric oxide (NO) system may be damaged in preeclampsia; however, the involved mechanisms are unclear. In this study, we used primary human umbilical vein endothelial cells (HUVECs) to evaluate the endothelial NO system in preeclampsia and to determine the underlying mechanisms that are involved. We isolated and cultured HUVECs from normal and preeclamptic pregnancies and evaluated endothelial NO synthase enzyme (eNOS) expression and NO production. Whole-cell K(+) currents and oxidative stress were also determined in normal and preeclamptic HUVECs...
January 12, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28056166/nitric-oxide-for-respiratory-failure-in-infants-born-at-or-near-term
#18
REVIEW
Keith J Barrington, Neil Finer, Thomas Pennaforte, Gabriel Altit
BACKGROUND: Nitric oxide (NO) is a major endogenous regulator of vascular tone. Inhaled nitric oxide (iNO) gas has been investigated as treatment for persistent pulmonary hypertension of the newborn. OBJECTIVES: To determine whether treatment of hypoxaemic term and near-term newborn infants with iNO improves oxygenation and reduces rate of death and use of extracorporeal membrane oxygenation (ECMO), or affects long-term neurodevelopmental outcomes. SEARCH METHODS: We used the standard search strategy of the Cochrane Neonatal Review Group to search the Cochrane Central Register of Controlled Trials (CENTRAL; 2016, Issue 1), MEDLINE via PubMed (1966 to January 2016), Embase (1980 to January 2016) and the Cumulative Index to Nursing and Allied Health Literature (CINAHL; 1982 to January 2016)...
January 5, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28031017/nitric-oxide-signaling-and-the-cross-talk-with-prostanoids-pathways-in-vascular-system
#19
Bruno R Silva, Tiago D Paula, Michele Paulo, Lusiane M Bendhack
BACKGROUND: This review provides an overview of the cellular signaling of nitric oxide (NO) and prostanoids in vascular cells and the possible cross talk between their pathways, mainly in hypertension, since the imbalance of these two systems has been attributed to development of some cardiovascular diseases. It also deals with the modulation of vasodilation induced by NO donors. NO is a well-known second messenger involved in many cellular functions. CONCLUSION: In the vascular system, the NO produced by endothelial NO-synthase (eNOS) or released by NO donors acts in vascular smooth muscle cells, the binding of NO to Fe2+-heme of soluble guanylyl-cyclase (sGC) activates sGC and the production of cyclic guanosine-3-5-monophosphate (cGMP)...
December 28, 2016: Medicinal Chemistry
https://www.readbyqxmd.com/read/28029743/statins-ameliorate-pulmonary-hypertension-secondary-to-left-ventricular-dysfunction-through-the-rho-kinase-pathway-and-nadph-oxidase
#20
I-Chen Chen, Mian-Shin Tan, Bin-Nan Wu, Chee-Yin Chai, Jwu-Lai Yeh, Shah-Hwa Chou, Ing-Jun Chen, Zen-Kong Dai
BACKGROUND: Pulmonary hypertension (PH) is a devastating disorder, for which no therapy is curative. It has been reported that pulmonary vascular remodeling, associated with increasing mean pulmonary arterial pressure and upregulated expression of endothelial nitric oxide synthase (eNOS), endothelin-1 (ET-1), RhoA/RhoH-kinase results in the development of PH. Oxidative stress and the RhoA/Rho-kinase pathway are also thought to be involved in the pathophysiology of PH. Statins are 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (HMG-CoA reductase inhibitors) with pleiotropic effects and are potential agents for the treatment of PH...
December 28, 2016: Pediatric Pulmonology
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