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https://www.readbyqxmd.com/read/28094875/neuroendocrinology-of-mast-cells-challenges-and-controversies
#1
REVIEW
Theoharis C Theoharides
Mast cells (MC) are hemopoietically-derived tissue immune cells that are ubiquitous in the body, including neuroendocrine organs such as the hypothalamus, pineal, pituitary, ovaries, pancreas and uterus where their action is not well understood. Mast cells have historically been associated with allergies because of their rich content of histamine and tryptase, but more recently with regulation of immunity and inflammation due their synthesis and release of numerous cytokines and chemokines. Mast cells are located perivascularly and express numerous receptors for diverse ligands such as allergens, pathogens, neurotransmitters, neuropeptides and hormones including acetylcholine, calcitonin gene-related peptide (CGRP), corticosteroids, corticotropin-releasing hormone (CRH), β-endorphin, epinephrine, 17β-estradiol, gonadotrophins, hemokinin-A (HKA), leptin, melatonin, neurotensin (NT), parathyroid hormone (PTH), substance P (SP) and vasoactive instestinal peptide (VIP)...
January 17, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28092320/does-a-platelet-transfusion-independently-affect-bleeding-and-adverse-outcomes-in-cardiac-surgery
#2
Fabienne M A van Hout, Esther K Hogervorst, Peter M J Rosseel, Johanna G van der Bom, Mohamed Bentala, Eveline L A van Dorp, Nan van Geloven, Anneke Brand, Nardo J M van der Meer, Leo M G van de Watering
BACKGROUND: Conflicting results have been reported concerning the effect of platelet transfusion on several outcomes. The aim of this study was to assess the independent effect of a single early intraoperative platelet transfusion on bleeding and adverse outcomes in cardiac surgery patients. METHODS: For this observational study, 23,860 cardiac surgery patients were analyzed. Patients who received one early (shortly after cardiopulmonary bypass while still in the operating room) platelet transfusion, and no other transfusions, were defined as the intervention group...
January 16, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28091902/nitrogen-oxide-endothelin-1-and-serotonin-in-the-blood-of-immature-spontaneously-hypertensive-rats
#3
M D Chibireva, G N Aflyatumova, V L Matveeva, D F Bilalova, O I Kuz'mina, D I Sadykova, R R Nigmatullina
Endothelial function is an early and sensitive marker of subclinical increase of BP in children and adolescents. It is associated with an imbalance of the key vasoactive factors (NO, endothelin-1, and serotonin). Immature spontaneously hypertensive rats (SHR line) are characterized by increased plasma concentrations of NO and endothelin-1 (by 14.7% and 2.9 times, respectively) and increased serotonin content in the plasma and platelets (by 2.7 and 2.3 times, respectively) in comparison with Wistar-Kyoto rats...
January 14, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28090305/resolution-of-myelofibrosis-associated-pulmonary-arterial-hypertension-following-allogeneic-hematopoietic-stem-cell-transplantation
#4
Saadia A Faiz, Cezar Iliescu, Juan Lopez-Mattei, Bela Patel, Lara Bashoura, Uday Popat
We present the case of a 62-year-old man with myelofibrosis-associated pulmonary arterial hypertension (PAH) who underwent allogeneic hematopoietic stem cell transplantation with subsequent resolution of disease and PAH. Right heart catheterization was used to guide PAH therapy before and after transplantation. Drug interactions, adverse effects, and renal insufficiency posed clinical challenges for the management of PAH-specific medications after transplantation. PAH improved soon after transplantation, and vasoactive medications were tapered off...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090285/pulmonary-vascular-and-ventricular-dysfunction-in-the-susceptible-patient-2015-grover-conference-series
#5
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/28088475/role-of-some-vasoactive-mediators-in-scorpion-envenomed-children-possible-relation-to-envenoming-outcome
#6
Sahar E M El-DeeK, Ayat A Sayed, Ahmed Y Nassar, Zeynab M Mohey-Eldeen, Hussein M Eldeeb, Abdel-Raheim M A Meki
Scorpion envenomation causes an autonomic storm resulting in changes in the vasoactive mediators' levels which lead to myocardial damage, cardiovascular disturbances, peripheral circulatory failure, pulmonary edema, multi-system-organ-failure and death. The study aimed to determine the circulating levels of adrenaline, noradrenaline, angiotensin converting enzyme (ACE), Angiotensin II (Ang II), kallikrein enzyme, nitric oxide (NO), aldosterone, and electrolytes Na(+), K(+) and Ca(+2) in scorpion envenomed children and to evaluate the potential relation between these vasoactive mediators, the severity of scorpion envenoming and the clinical outcome of envenomed children...
January 11, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28081038/impact-of-hiv-infection-and-antiretroviral-treatment-on-n-terminal-prohormone-of-brain-natriuretic-peptide-as-surrogate-of-myocardial-function
#7
Christopher Schuster, Christina Binder, Robert Strassl, Maximilian C Aichelburg, Emma Blackwell, Noemi Pavo, Michael Ramharter, Martin Hülsmann, Katharina Grabmeier-Pfistershammer, Armin Rieger, Georg Goliasch
OBJECTIVE: Vasoactive cardiovascular hormones such as the N-terminal prohormone of brain natriuretic peptide (NT-proBNP) are produced upon ventricular stretch and play a central role in neurohumoral pathways of the heart regulating cardiovascular remodeling and volume homeostasis. The impact of HIV infection on these neurohumoral pathways of the heart and its potential reversibility by combinations of antiretroviral therapies remain unclear. METHODS: We assessed serum levels of NT-proBNP in 219 antiretroviral therapy-naïve HIV-infected patients with a normal cardiac and renal status at treatment initiation and after attainment of viremic control...
January 28, 2017: AIDS
https://www.readbyqxmd.com/read/28079752/changes-in-dorsal-root-ganglion-gene-expression-in-response-to-spinal-cord-stimulation
#8
Dana M Tilley, David L Cedeño, Courtney A Kelley, Margaret DeMaegd, Ramsin Benyamin, Ricardo Vallejo
BACKGROUND AND OBJECTIVES: Spinal cord stimulation (SCS) has been shown to influence pain-related genes in the spinal cord directly under the stimulating electrodes. There is limited information regarding changes occurring at the dorsal root ganglion (DRG). This study evaluates gene expression in the DRG in response to SCS therapy. METHODS: Rats were randomized into experimental or control groups (n = 6 per group). Experimental animals underwent spared-nerve injury, implantation of lead, and continuous SCS (72 hours)...
January 11, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28074232/vasoactive-actions-of-nitroxyl-hno-are-preserved-in-resistance-arteries-in-diabetes
#9
Marianne Tare, Rushita S R Kalidindi, Kristen J Bubb, Helena C Parkington, Wee-Ming Boon, Xiang Li, Christopher G Sobey, Grant R Drummond, Rebecca H Ritchie, Barbara K Kemp-Harper
Endothelial dysfunction is a major risk factor for the vascular complications of diabetes. Increased reactive oxygen species (ROS) generation, a hallmark of diabetes, reduces the bioavailability of endothelial vasodilators, including nitric oxide (NO·). The vascular endothelium also produces the one electron reduced and protonated form of NO·, nitroxyl (HNO). Unlike NO·, HNO is resistant to scavenging by superoxide anions (·O2(─)). The fate of HNO in resistance arteries in diabetes is unknown. We tested the hypothesis that the vasodilator actions of endogenous and exogenous HNO are preserved in resistance arteries in diabetes...
January 10, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28073873/recurrent-angioedema-associated-with-pharmacological-inhibition-of-dipeptidyl-peptidase-iv
#10
Thorbjørn Hermanrud, Anette Bygum, Eva Rye Rasmussen
Angioedema (AE) of the upper airways is a severe and potentially life-threatening condition. The incidence has been increasing in the past two decades, primarily due to increased use of medications inhibiting the degradation of vasoactive peptides. Acquired angioedema related to angiotensin-converting enzyme inhibitors (ACEI-AAE) is well known, but other pharmaceutical agents also affect the degradation of bradykinin and substance P. We present a middle-aged man with recurrent episodes of severe AE of the oral cavity, hypopharynx and larynx due to pharmacological inhibition of dipeptidyl peptidase IV...
January 10, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28072699/prevention-preferable-to-treatment-3-case-reports-of-patients-experiencing-right-sided-heart-failure-after-ebstein-anomaly-correction
#11
Ming Luo, Jing Lin, Zhen Qin, Lei Du
RATIONALE: Ebstein anomaly is a common congenital heart disease that may induce severe tricuspid regurgitation and dilation of the "atrialized" portion of the right ventricle. Patients who undergo surgery to correct Ebstein anomaly are at high risk of postoperative right-sided heart failure, yet little is known about what pre-, peri-, or postoperative procedures may help reduce this risk. PATIENT CONCERNS: Here, we describe 3 cases of adults with Ebstein anomaly who underwent corrective surgery and in whom right-sided heart failure occurred with severe tricuspid regurgitation detected by transesophageal echocardiography...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28069927/impact-of-altered-cholinergic-tones-on-the-neurovascular-coupling-response-to-whisker-stimulation
#12
Clotilde Lecrux, Claire H Sandoe, Sujaya Neupane, Pascal Kropf, Xavier Toussay, Xin-Kang Tong, María Lacalle-Aurioles, Amir Shmuel, Edith Hamel
Brain imaging techniques that use vascular signals to map changes in neuronal activity rely on the coupling between electrophysiology and hemodynamics, a phenomenon referred to "neurovascular coupling" (NVC). It is unknown whether this relationship remains reliable under altered brain states associated to acetylcholine (ACh) levels, such as attention and arousal, and in pathological conditions like Alzheimer's disease. We therefore assessed the effects of varying ACh tone on whisker evoked-NVC responses in rat barrel cortex, measured by cerebral blood flow (CBF) and neurophysiological recordings (local field potentials, LFPs)...
January 9, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28069789/hypotension-induced-by-the-concomitant-use-of-a-calcium-channel-blocker-and-clarithromycin
#13
Sayako Takeuchi, Yuki Kotani, Toshihide Tsujimoto
In the elderly, calcium-channel blockers are the first-line treatment for hypertension, and macrolides are commonly prescribed antibiotics. Here we report a 78-year-old man taking nifedipine, diltiazem and carvedilol who presented with persistent hypotension and bradycardia after clarithromycin was prescribed. He was diagnosed with drug-induced hypotension and treated with fluid resuscitation and vasoactive agents. His symptoms gradually improved. He was transferred out of the intensive care unit 3 days after hospitalisation...
January 9, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28068636/citrus-leaf-extract-reduces-blood-pressure-and-vascular-damage-in-repeatedly-heated-palm-oil-diet-induced-hypertensive-rats
#14
Hawa Nordin Siti, Yusof Kamisah, Mohd Ishak Nur Iliyani, Suhaila Mohamed, Kamsiah Jaarin
Prolonged consumption of repeatedly heated vegetable oil increases blood pressure. This study aimed to determine the effects of Citrus leaf extract, (CLE) on blood pressure, blood pressure-regulating enzymes and mediators, as well as aortic histomorphometry in heated palm oil induced-hypertension. Male Sprague Dawley rats (n=56) were divided into seven groups; control group was given normal diet and the other groups were fed with palm oil-enriched diet (15% w/w) either fresh (FPO), five-time-heated (5HPO) or ten-time-heated (10HPO) with or without CLE (0...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28067685/association-between-initial-emergency-department-lactate-and-use-of-vasoactive-medication-in-children-with-septic-shock
#15
Michael J Miescier, Roni D Lane, Xiaoming Sheng, Gitte Y Larsen
OBJECTIVES: Current guidelines emphasize early recognition of pediatric septic shock using clinical examination findings. Elevated serum lactate has been associated with increased mortality in adult patients with septic shock. Our objective was to determine the association between the initial serum lactate obtained in the pediatric emergency department (PED) from patients treated for septic shock and the use of vasoactive medication within 24 hours. METHODS: This was a retrospective study from 2008 through 2012 of PED patients at a tertiary care children's hospital...
January 6, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28066953/diabetic-and-idiopathic-gastroparesis-is-associated-with-loss-of-cd206-positive-macrophages-in-the-gastric-antrum
#16
M Grover, C E Bernard, P J Pasricha, H P Parkman, S J Gibbons, J Tonascia, K L Koch, R W McCallum, I Sarosiek, W L Hasler, L A B Nguyen, T L Abell, W J Snape, M L Kendrick, T A Kellogg, T J McKenzie, F A Hamilton, G Farrugia
BACKGROUND: Animal studies have increasingly highlighted the role of macrophages in the development of delayed gastric emptying. However, their role in the pathophysiology of human gastroparesis is unclear. Our aim was to determine changes in macrophages and other cell types in the gastric antrum muscularis propria of patients with diabetic and idiopathic gastroparesis. METHODS: Full thickness gastric antrum biopsies were obtained from patients enrolled in the Gastroparesis Clinical Research Consortium (11 diabetic, 6 idiopathic) and 5 controls...
January 9, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28060929/a-single-vector-platform-for-high-level-gene-transduction-of-central-neurons-adeno-associated-virus-vector-equipped-with-the-tet-off-system
#17
Jaerin Sohn, Megumu Takahashi, Shinichiro Okamoto, Yoko Ishida, Takahiro Furuta, Hiroyuki Hioki
Visualization of neurons is indispensable for the investigation of neuronal circuits in the central nervous system. Virus vectors have been widely used for labeling particular subsets of neurons, and the adeno-associated virus (AAV) vector has gained popularity as a tool for gene transfer. Here, we developed a single AAV vector Tet-Off platform, AAV-SynTetOff, to improve the gene-transduction efficiency, specifically in neurons. The platform is composed of regulator and response elements in a single AAV genome...
2017: PloS One
https://www.readbyqxmd.com/read/28060152/an-elevated-low-cardiac-output-syndrome-score-is-associated-with-morbidity-in-infants-after-congenital-heart-surgery
#18
Kalia P Ulate, Ofer Yanay, Howard Jeffries, Harris Baden, Jane L Di Gennaro, Jerry Zimmerman
OBJECTIVES: To evaluate an empirically derived Low Cardiac Output Syndrome Score as a clinical assessment tool for the presence and severity of Low Cardiac Output Syndrome and to examine its association with clinical outcomes in infants who underwent surgical repair or palliation of congenital heart defects. DESIGN: Prospective observational cohort study. SETTING: Cardiac ICU at Seattle Children's Hospital. PATIENTS: Infants undergoing surgical repair or palliation of congenital heart defects...
January 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28058720/an-observational-study-of-community-acquired-severe-sepsis-comparing-intensive-care-and-non-intensive-care-patients
#19
S T Nygård, S Skrede, N Langeland, H K Flaatten
BACKGROUND: Most studies of sepsis are from intensive care units (ICUs). We aimed to investigate community-acquired severe sepsis in a broader population, in order to compare patients treated in or outside an ICU . METHODS: We performed a 1-year prospective observational study with enrollment of patients from three units; a general ICU, a combined ICU/non-ICU and a medical ward with limited surveillance facilities. Hospital survivors were followed up for 5 years...
January 6, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28056085/vascular-endothelial-over-expression-of-human-soluble-epoxide-hydrolase-tie2-seh-tr-attenuates-coronary-reactive-hyperemia-in-mice-role-of-oxylipins-and-%C3%AF-hydroxylases
#20
Ahmad Hanif, Matthew L Edin, Darryl C Zeldin, Christophe Morisseau, John R Falck, Mohammed A Nayeem
Cytochromes P450 metabolize arachidonic acid (AA) into two vasoactive oxylipins with opposing biologic effects: epoxyeicosatrienoic acids (EETs) and omega-(ω)-terminal hydroxyeicosatetraenoic acids (HETEs). EETs have numerous beneficial physiological effects, including vasodilation and protection against ischemia/reperfusion injury, whereas ω-terminal HETEs induce vasoconstriction and vascular dysfunction. We evaluated the effect of these oxylipins on post-ischemic vasodilation known as coronary reactive hyperemia (CRH)...
2017: PloS One
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