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Nasal nitric oxide

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https://www.readbyqxmd.com/read/27930477/respiratory-and-ocular-symptoms-among-employees-at-swedish-indoor-swimming-pools
#1
Håkan Löfstedt, Jessica Westerlund, Pål Graff, Ing-Liss Bryngelsson, Göte Mölleby, Anna-Carin Olin, Kåre Eriksson, Håkan Westberg
BACKGROUND: This study investigated trichloramine exposure and prevalence of respiratory and ocular symptoms among Swedish indoor swimming pool workers. METHODS: Questionnaires were distributed to pool workers and referents. Lung function and fraction of exhaled nitric oxide (FeNO) were measured before and after work. Exposure to trichloramine and trihalomethanes was measured over work shifts. RESULTS: The mean personal trichloramine exposure was 36 μg/m...
December 2016: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/27892921/an-essential-role-for-bacterial-nitric-oxide-synthase-in-staphylococcus-aureus-electron-transfer-and-colonization
#2
Traci L Kinkel, Smirla Ramos-Montañez, Jasmine M Pando, Daniel V Tadeo, Erin N Strom, Stephen J Libby, Ferric C Fang
Nitric oxide (NO(•)) is a ubiquitous molecular mediator in biology. Many signalling actions of NO(•) generated by mammalian NO(•) synthase (NOS) result from targeting of the haem moiety of soluble guanylate cyclase. Some pathogenic and environmental bacteria also produce a NOS that is evolutionary related to the mammalian enzymes, but a bacterial haem-containing receptor for endogenous enzymatically generated NO(•) has not been identified previously. Here, we show that NOS of the human pathogen Staphylococcus aureus, in concert with an NO(•)-metabolizing flavohaemoprotein, regulates electron transfer by targeting haem-containing cytochrome oxidases under microaerobic conditions to maintain membrane bioenergetics...
November 28, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27884476/systemic-immunization-with-rpotd-reduces-streptococcus-pneumoniae-nasopharyngeal-colonization-in-mice
#3
T R Converso, C Goulart, D Rodriguez, M Darrieux, L C C Leite
Streptococcus pneumoniae (pneumococcus) is a human pathogen that can cause otitis media, pneumonia and, in severe cases, meningitis and bacteremia. The pneumococcus expresses PotD, a protein belonging to the polyamines transporter complex called PotABCD. PotD is a membrane-associated protein that binds polyamines and has been shown to be important for virulence. In this work we demonstrate that subcutaneous immunization with rPotD reduces the bacterial load in the nasal tissue of mice, following intranasal challenge with a type 6B pneumococcus...
November 21, 2016: Vaccine
https://www.readbyqxmd.com/read/27852361/-lower-airway-abnormalities-in-patients-with-allergic-rhinitis
#4
J F Ji, Q P Wang, Y Zhang, Z Y Wang, Y Q Xie, W J Guan, K M Wu, L Xu, W Chen, F Xue, M J Jiang, T Y Wang, N S Zhong
Objective: To investigate the characteristics of lower airway abnormalities in allergic rhinitis(AR) patients without asthma. Methods: Between June 2008 and December 2012, 377 consecutive AR patients and 264 healthy subjects were recruited. All subjects underwent meticulous history taking, nasal examination, allergen skin prick test, blood routine test, serum total immunoglobin E assay, induced sputum cell count and differentials, measurement of fractional exhaled nitric oxide (FeNO) and bronchial challenge test...
November 12, 2016: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/27837378/nasal-nitric-oxide-improved-by-continuous-positive-airway-pressure-therapy-for-upper-airway-inflammation-in-obstructive-sleep-apnea
#5
Satoshi Hamada, Shuji Tatsumi, Yoshiki Kobayashi, Hirotaka Yasuba
PURPOSE: In this report, we examined the association between obstructive sleep apnea (OSA) and upper and lower airway inflammation based on nitric oxide (NO) measurements. METHODS: Study subjects included 51 consecutive participants. Sleep-disordered breathing was evaluated by a type 3 portable monitor and quantified by respiratory disturbance index (RDI). Airway inflammation was noninvasively analyzed by the measurement of nasally and orally exhaled NO; nasal value was presented as nasally exhaled NO minus orally exhaled NO...
November 12, 2016: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/27836958/european-respiratory-society-guidelines-for-the-diagnosis-of-primary-ciliary-dyskinesia
#6
Jane S Lucas, Angelo Barbato, Samuel A Collins, Myrofora Goutaki, Laura Behan, Daan Caudri, Sharon Dell, Ernst Eber, Estelle Escudier, Robert A Hirst, Claire Hogg, Mark Jorissen, Philipp Latzin, Marie Legendre, Margaret W Leigh, Fabio Midulla, Kim G Nielsen, Heymut Omran, Jean-Francois Papon, Petr Pohunek, Beatrice Redfern, David Rigau, Bernhard Rindlisbacher, Francesca Santamaria, Amelia Shoemark, Deborah Snijders, Thomy Tonia, Andrea Titieni, Woolf T Walker, Claudius Werner, Andrew Bush, Claudia E Kuehni
The diagnosis of primary ciliary dyskinesia is often confirmed with standard, albeit complex and expensive, tests. In many cases, however, the diagnosis remains difficult despite the array of sophisticated diagnostic tests. There is no "gold standard" reference test. Hence, a Task Force supported by the European Respiratory Society has developed this guideline to provide evidence-based recommendations on diagnostic testing, especially in light of new developments in such tests, and the need for robust diagnoses of patients who might enter randomised controlled trials of treatments...
November 11, 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/27823578/measuring-nasal-nitric-oxide-in-allergic-rhinitis-patients
#7
V S Nesic, V Z Djordjevic, V Tomic-Spiric, Z R Dudvarski, I A Soldatovic, N A Arsovic
OBJECTIVE: This study aimed to compare two sampling methods for nasal nitric oxide in healthy individuals and allergic rhinitis patients, and to examine the within-subject reliability of nasal nitric oxide measurement. METHODS: The study included 23 allergic rhinitis patients without concomitant asthma and 10 healthy individuals. For all participants, nitric oxide levels were measured non-invasively from the lungs through the mouth (i.e. the oral fractional exhaled nitric oxide) and the nose...
November 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27792747/nasal-airflow-measured-by-rhinomanometry-correlates-with-feno-in-children-with-asthma
#8
I-Chen Chen, Yu-Tsai Lin, Jong-Hau Hsu, Yi-Ching Liu, Jiunn-Ren Wu, Zen-Kong Dai
BACKGROUND: Rhinitis and asthma share similar immunopathological features. Rhinomanometry is an important test used to assess nasal function and spirometry is an important tool used in asthmatic children. The degree to which the readouts of these tests are correlated has yet to be established. We sought to clarify the relationship between rhinomanometry measurements, fractional exhaled nitric oxide (FeNO), and spirometric measurements in asthmatic children. METHODS: Patients' inclusion criteria: age between 5 and 18 years, history of asthma with nasal symptoms, and no anatomical deformities...
2016: PloS One
https://www.readbyqxmd.com/read/27753120/longitudinal-analysis-of-inflammatory-biomarkers-during-acute-rhinosinusitis
#9
Timo J Autio, Timo Koskenkorva, Tuomo K Leino, Petri Koivunen, Olli-Pekka Alho
OBJECTIVE: To illuminate the pathophysiology of acute rhinosinusitis (ARS) with sequential monitoring of inflammatory biomarkers during an ARS episode and to clarify their diagnostic usability in bacterial ARS. STUDY DESIGN: Inception cohort study with 50 conscripts with ARS. METHODS: We collected peripheral blood high-sensitive C-reactive protein (hs-CRP), white blood cell (WBC), procalcitonin, and nasal nitric oxide (nNO) counts at 2 to 3 and 9 to 10 days of symptoms during an ARS episode...
October 18, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27711045/non-invasive-inhaled-nitric-oxide-in-the-treatment-of-hypoxemic-respiratory-failure-in-term-and-preterm-infants
#10
R Sahni, X Ameer, K Ohira-Kist, J-T Wung
OBJECTIVES: Inhaled nitric oxide (iNO) is effective in conjunction with tracheal intubation (TI) and mechanical ventilation (MV) for treating arterial pulmonary hypertension and hypoxemic respiratory failure (HRF) in near-term and term newborns. Non-invasive respiratory support with nasal continuous positive airway pressure (CPAP) is increasingly used to avoid morbidity associated with TI and MV, yet the effectiveness of iNO delivery via nasal CPAP remains unknown. To evaluate the effectiveness of iNO delivered via the bubble nasal CPAP system in term and preterm newborns with HRF...
October 6, 2016: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/27707660/determinants-of-incomplete-asthma-control-in-patients-with-allergic-rhinitis-and-asthma
#11
Asako Oka, Tsunahiko Hirano, Yoshikazu Yamaji, Kosuke Ito, Keiji Oishi, Nobutaka Edakuni, Reo Kawano, Kazuto Matsunaga
BACKGROUND: Characterizing associations between the upper and lower airways is important for asthma management. OBJECTIVES: This study aimed to assess the determinants of incomplete asthma control in patients with allergic rhinitis (AR) and asthma. METHODS: Multiple factors including age, sex, atopy, smoking history, medication use, Asthma Control Questionnaire (ACQ) score, FEV1, fraction of exhaled nitric oxide (Feno), and rhinitis questionnaire score were examined...
October 1, 2016: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/27696764/effects-of-leukotriene-d4-and-histamine-nasal-challenge-on-airway-responsiveness-and-inflammation-in-persistent-allergic-rhinitis-patients
#12
Zheng Zhu, Yanqing Xie, Weijie Guan, Yi Gao, Shu Xia, Rongquan Huang, Nanshan Zhong, Jinping Zheng
Background Both histamine and leukotrienes are implicated in the pathogenesis of allergic rhinitis (AR), although the pattern and severity of the nasal response to these two potent inflammatory mediators may differ, which has not been adequately studied in patients with persistent AR. Objective We sought to compare the differential effects of nasal challenge with leukotriene D4 (LTD4 ) and histamine on the airway response and inflammation in patients with AR. Methods An open-label, crossover study was performed in 25 persistent AR patients (AR group) and 16 healthy subjects (control group)...
October 3, 2016: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/27692400/the-role-of-nasal-fractional-exhaled-nitric-oxide-as-an-objective-parameter-independent-of-nasal-airflow-resistance-in-the-diagnosis-of-allergic-rhinitis
#13
Sachio Takeno, Yutaka Okabayashi, Takashi Kohno, Kouhei Yumii, Katsuhiro Hirakawa
OBJECTIVE: Patients with allergic rhinitis (AR) show augmented activity of nitric oxide (NO) metabolism, similar to those in bronchial asthma (BA). We hypothesized that measurements of nasal fractional exhaled NO (FeNO) could be used as an objective marker to detect the presence of AR. Our objective was to clarify the influence of nasal airflow resistance (NAR) on nasal FeNO levels through an exhalation maneuver in symptomatic AR patients. We also examined the diagnostic test validity of the mean nasal FeNO level for disease discrimination by means of a receiver operating characteristic (ROC) curve analysis...
September 27, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27692146/primary-ciliary-dyskinesia-in-israel-prevalence-clinical-features-current-diagnosis-and-management-practices
#14
Revital Abitbul, Israel Amirav, Hannah Blau, Soliman Alkrinawi, Micha Aviram, David Shoseyov, Lea Bentur, Avraham Avital, Chaim Springer, Moran Lavie, Dario Prais, Husein Dabbah, Nael Elias, Arnon Elizur, Shmuel Goldberg, Avigdor Hevroni, Eitan Kerem, Anthony Luder, Yehudah Roth, Malena Cohen-Cymberknoh, Marta Ben Ami, Avigdor Mandelberg, Galit Livnat, Elie Picard, Joseph Rivlin, Moshe Rotschild, Ruth Soferman, Niki T Loges, Heike Olbrich, Claudius Werner, Alexander Wolter, Martina Herting, Julia Wallmeier, Johanna Raidt, Heymut Omran, Huda Mussaffi
BACKGROUND: Primary Ciliary Dyskinesia (PCD) is rare and its features in Israel have not been described. AIMS: to assess prevalence utilizing state-of-the-art diagnostic techniques, and describe clinical features, diagnostic and management practices in Israel. METHODS: A national multicenter study from 2012 to 2013 recruited patients diagnosed or suspected of having PCD. Diagnosis was verified using: nasal Nitric Oxide (nNO); High-speed Video Microscope Analysis (HVMA); Transmission Electron Microscopy (TEM) of cilia; Immuno-fluorescence staining (IF) for ciliary proteins, and genetic analysis...
October 2016: Respiratory Medicine
https://www.readbyqxmd.com/read/27680603/clinical-phenotype-and-current-diagnostic-criteria-for-primary-ciliary-dyskinesia
#15
Eleonora Dehlink, Claire Hogg, Siobhan B Carr, Andrew Bush
INTRODUCTION: Primary ciliary dyskinesia (PCD) is a rare, mostly autosomal-recessive disorder of motile cilia, characterized by chronic lung disease, rhinosinusitis, hearing impairment, and subfertility. PCD is still often missed or diagnosed late since symptoms overlap with common respiratory complaints, but should be considered if one or more of the cardinal clues are present. AREAS COVERED: We provide an overview on clinical presentations of PCD and clues for when to consider PCD, these include unexplained neonatal respiratory distress, persistent rhinitis from the first days of life, situs anomalies, or otorrhoea following tympanostomy tube insertion...
September 28, 2016: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/27515707/genetic-polymorphism-of-antioxidant-enzymes-in-eosinophilic-and-non-eosinophilic-nasal-polyposis
#16
Abdulvahap Akyigit, Erol Keles, Ebru Onalan Etem, Ibrahim Ozercan, Hatice Akyol, Oner Sakallioglu, Turgut Karlidag, Cahit Polat, Irfan Kaygusuz, Sinasi Yalcin
Chronic rhinosinusitis with nasal polyps (CRSwNP) is a chronic inflammatory disease of the paranasal sinuses, and its pathophysiology is not yet precisely known. It is suggested that oxygen free radicals play an important role in the pathogenesis of nasal polyposis. This study aimed to identify genetic polymorphisms of superoxide dismutase (SOD 2), catalase (CAT), and inducible nitric oxide synthase (iNOS) enzymes in eosinophilic CRSwNP and non-eosinophilic CRSwNP patients; the study also aimed to evaluate the effect of genetic polymorphism of antioxidant enzymes on CRSwNP etiopathogenesis...
August 11, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27514592/primary-ciliary-dyskinesia
#17
REVIEW
Michael R Knowles, Maimoona Zariwala, Margaret Leigh
Primary ciliary dyskinesia (PCD) is a recessive genetically heterogeneous disorder of motile cilia with chronic otosinopulmonary disease and organ laterality defects in ∼50% of cases. The prevalence of PCD is difficult to determine. Recent diagnostic advances through measurement of nasal nitric oxide and genetic testing has allowed rigorous diagnoses and determination of a robust clinical phenotype, which includes neonatal respiratory distress, daily nasal congestion, and wet cough starting early in life, along with organ laterality defects...
September 2016: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/27462149/pulmonary-vascular-effects-of-pulsed-inhaled-nitric-oxide-in-copd-patients-with-pulmonary-hypertension
#18
Bita Hajian, Jan De Backer, Wim Vos, Cedric Van Holsbeke, Francisca Ferreira, Deborah A Quinn, Annemie Hufkens, Rita Claes, Wilfried De Backer
INTRODUCTION: Severe chronic obstructive pulmonary disease (COPD) is often associated with secondary pulmonary hypertension (PH), which worsens prognosis. PH can be lowered by oxygen, but also by inhaled nitric oxide (NO), which has the potential to improve the health status of these patients. NO is an important mediator in vascular reactions in the pulmonary circulation. Oral compounds can act through NO-mediated pathways, but delivering pulsed inhaled NO (iNO) directly to the airways and pulmonary vasculature could equally benefit patients...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27442155/early-inhaled-nitric-oxide-in-preterm-infants-34-weeks-with-evolving-bronchopulmonary-dysplasia
#19
Q Jiang, X Gao, C Liu, D Chen, X Lin, S Xia, D Zhuang, C Yang, W Zhu, L Liu, C Chen, B Sun
OBJECTIVE: To investigate whether early treatment with inhaled nitric oxide (iNO) could prevent bronchopulmonary dysplasia (BPD) in very preterm infants. STUDY DESIGN: A non-randomized, controlled trial was conducted prospectively in 27 neonatal intensive care units over 12 months. Preterm infants with gestational age <34 weeks and after 7 days of life, who received invasive mechanical ventilation (MV) or nasal continuous positive airway pressure for >2 days, were treated either with low-dose iNO (from 5 as initial dose to 2 parts per million as maintenance dose for ⩾7 days, n=162) or as non-placebo control (n=240)...
October 2016: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/27425415/sphenopalatine-ganglion-acupuncture-improves-nasal-ventilation-and-modulates-autonomic-nervous-activity-in-healthy-volunteers-a-randomized-controlled-study
#20
Kuiji Wang, Luquan Chen, Yang Wang, Chengshuo Wang, Luo Zhang
The study aimed to assess the effects of Sphenopalatine ganglion (SPG) acupuncture on nasal ventilation function and autonomic nervous system in health volunteers. 39 healthy subjects were randomly assigned to either active SPG acupuncture group (AA group) or sham-SPG acupuncture group (SA group). All subjects were assessed for self-reported nasal ventilation, nasal patency (nasal airway resistance (NAR) and nasal cavity volume (NCV), exhaled nasal nitric oxide (nNO), and neuropeptides (substance P(SP), vasoactive intestinal peptide (VIP) and neuropeptide Y (NPY)) in nasal secretions at baseline, 30 minutes, 2 hours, and 24 hours after acupuncture...
July 18, 2016: Scientific Reports
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