keyword
MENU ▼
Read by QxMD icon Read
search

Mechanism of airway clearance

keyword
https://www.readbyqxmd.com/read/29244804/conditional-knockout-mice-for-the-distal-appendage-protein-cep164-reveal-its-essential-roles-in-airway-multiciliated-cell-differentiation
#1
Saul S Siller, Himanshu Sharma, Shuai Li, June Yang, Yong Zhang, Michael J Holtzman, Wipawee Winuthayanon, Holly Colognato, Bernadette C Holdener, Feng-Qian Li, Ken-Ichi Takemaru
Multiciliated cells of the airways, brain ventricles, and female reproductive tract provide the motive force for mucociliary clearance, cerebrospinal fluid circulation, and ovum transport. Despite their clear importance to human biology and health, the molecular mechanisms underlying multiciliated cell differentiation are poorly understood. Prior studies implicate the distal appendage/transition fiber protein CEP164 as a central regulator of primary ciliogenesis; however, its role in multiciliogenesis remains unknown...
December 15, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29187536/inflammasome-antagonism-by-human-parainfluenza-virus-type-3-c-protein
#2
Niraj K Shil, Swechha M Pokharel, Amiya K Banerjee, Michael Hoffman, Santanu Bose
Human parainfluenza virus type 3 (HPIV3) is a negative-sense single-stranded RNA virus belonging to the paramyxoviridae family. HPIV3 is a lung tropic virus causing airway diseases including pneumonia, croup, and bronchiolitis during infancy and childhood. Activation of inflammasome by pathogens results in production of pro-inflammatory cytokines like IL-1β during infection. Thus, inflammasome mediated pro-inflammatory response plays a critical role in regulating immune response and virus clearance. Inflammasome is a multimeric protein complex triggering caspase-1 activation...
November 29, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29184554/il-17-and-tnf-%C3%AE-are-key-mediators-of-moraxella-catarrhalis-triggered-exacerbation-of-allergic-airway-inflammation
#3
Safa Alnahas, Stefanie Hagner, Hartmann Raifer, Ayse Kilic, Georg Gasteiger, Reinier Mutters, Anne Hellhund, Immo Prinz, Olaf Pinkenburg, Alexander Visekruna, Holger Garn, Ulrich Steinhoff
Alterations of the airway microbiome are often associated with pulmonary diseases. For example, detection of the bacterial pathogen Moraxella catarrhalis in the upper airways is linked with an increased risk to develop or exacerbate asthma. However, the mechanisms by which M. catarrhalis augments allergic airway inflammation (AAI) remain unclear. We here characterized the cellular and soluble mediators of M. catarrhalis triggered excacerbation of AAI in wt and IL-17 deficient as well as in animals treated with TNF-α and IL-6 neutralizing antibodies...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29174453/correlation-of-high-flow-nasal-cannula-outlet-area-with-gas-clearance-and-pressure-in-adult-upper-airway-replicas
#4
REVIEW
Charles P Moore, Ira M Katz, Georges Caillibotte, Warren H Finlay, Andrew R Martin
BACKGROUND: Primary benefits of high flow nasal cannula therapy include washout of carbon dioxide rich exhaled gas and increased airway pressures during tidal breathing. This work reports on the influence of high flow nasal cannula outlet area on upper airways gas clearance and tracheal pressures using measurements in five realistic adult nose-throat airway replicas. METHODS: Two commercial high flow nasal cannulas and one generic nasal cannula of varying size were compared...
November 11, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29163395/role-of-soluble-innate-effector-molecules-in-pulmonary-defense-against-fungal-pathogens
#5
REVIEW
Soledad R Ordonez, Edwin J A Veldhuizen, Martin van Eijk, Henk P Haagsman
Fungal infections of the lung are life-threatening but rarely occur in healthy, immunocompetent individuals, indicating efficient clearance by pulmonary defense mechanisms. Upon inhalation, fungi will first encounter the airway surface liquid which contains several soluble effector molecules that form the first barrier of defense against fungal infections. These include host defense peptides, like LL-37 and defensins that can neutralize fungi by direct killing of the pathogen, and collectins, such as surfactant protein A and D, that can aggregate fungi and stimulate phagocytosis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29156907/the-palliative-care-needs-for-those-advanced-neurology-patients-on-mechanical-ventilator-support
#6
Tsz Kin Kwok
There are mainly two types of needs for the ventilator users with severe neurological diseases: respiratory related needs include mode of ventilation selection, mode of ventilator prescription, maintaining lung recruitment and good airway clearance; non-respiratory related needs include substantial nursing care, adequate nutrition, accessible communication and psychological support. All these are important to maintain the quality of life of these patients.
September 13, 2017: Annals of Palliative Medicine
https://www.readbyqxmd.com/read/29114887/cough-strength-and-expiratory-force-in-aspirating-and-nonaspirating-postradiation-head-and-neck-cancer-survivors
#7
Katherine A Hutcheson, Martha P Barrow, Carla L Warneke, Yiqun Wang, George Eapen, Stephen Y Lai, Denise A Barringer, Emily K Plowman, Jan S Lewin
OBJECTIVE: Expiratory functions that clear aspiration from the airway are compromised in patients with neurogenic dysphagia for whom cough and expiratory force may be impaired by the primary disease process. The relationship between expiratory function, cough, and aspiration is less clear in head and neck cancer (HNC) survivors for whom the disease process does not directly impact the lower respiratory system. Our objective was to compare mechanisms of airway clearance (expiratory force and cough) with aspiration status in postradiated HNC survivors...
November 8, 2017: Laryngoscope
https://www.readbyqxmd.com/read/29109332/hydrogen-enriched-water-eliminates-fine-particles-from-the-lungs-and-blood-by-enhancing-phagocytic-activity
#8
Jieun Choi, Eun Suk An, Young-Hwan Ban, Da Woom Seo, Tae-Su Kim, Sung-Pyo Lee, You Lin, Ehn-Kyoung Choi, Yun-Bae Kim
Particulate matters (PM) are one of the major body burdens leading to diseases. We investigated the capacities of a hydrogen-enriched water (HW) eliminating carbon nanoparticles (CNP) and carbon microparticles (CMP) from the lungs and blood, respectively. In CNP-elimination test, rats were orally administered with purified water (PW) or HW (10 or 30 mL/kg/day) for 10 weeks. At the time point of 4 weeks, the rats were challenged with intratracheal instillation of CNP (4 mg). CNP accumulated in the airways and alveoli, and induced inflammatory lesions...
November 1, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29102290/ion-channels-as-targets-to-treat-cystic-fibrosis-lung-disease
#9
S Lorraine Martin, Vinciane Saint-Criq, Tzyh-Chang Hwang, László Csanády
Lung health relies on effective mucociliary clearance and innate immune defence mechanisms. In cystic fibrosis (CF), an imbalance in ion transport due to an absence of chloride ion secretion, caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) and a concomitant sodium hyperabsorption, caused by dyregulation of the epithelial sodium channel (ENaC), results in mucus stasis which predisposes the lungs to cycles of chronic infection and inflammation leading to lung function decline...
October 25, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/29077094/non-oncogenic-roles-of-tap73-from-multiciliogenesis-to-metabolism
#10
REVIEW
Alice Nemajerova, Ivano Amelio, Jakob Gebel, Volker Dötsch, Gerry Melino, Ute M Moll
The p53 family of transcription factors (p53, p63 and p73) covers a wide range of functions critical for development, homeostasis and health of mammals across their lifespan. Beside the well-established tumor suppressor role, recent evidence has highlighted novel non-oncogenic functions exerted by p73. In particular, p73 is required for multiciliated cell (MCC) differentiation; MCCs have critical roles in brain and airways to move fluids across epithelial surfaces and to transport germ cells in the reproductive tract...
October 27, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29066586/mechanical-insufflation-exsufflation-versus-conventional-chest-physiotherapy-in-children-with-cerebral-palsy
#11
Rasintra Siriwat, Jitladda Deerojanawong, Suchada Sritippayawan, Sumalee Hantragool, Prapasri Cheanprapai
BACKGROUND: The cough mechanism is often impaired in children with quadriplegic spastic cerebral palsy, accounting for the high prevalence of pneumonia and atelectasis requiring prolonged hospitalization. Conventional chest physiotherapy (CPT) is a current technique recommended at the onset of lower-respiratory infections in cerebral palsy. Previous studies have demonstrated the usefulness of mechanical insufflation-exsufflation (MI-E) in children with neuromuscular disease. To date, there has been no study of MI-E in children with quadriplegic spastic cerebral palsy...
October 24, 2017: Respiratory Care
https://www.readbyqxmd.com/read/29057902/trpv4-activation-triggers-protective-responses-to-bacterial-lipopolysaccharides-in-airway-epithelial-cells
#12
Yeranddy A Alpizar, Brett Boonen, Alicia Sanchez, Carole Jung, Alejandro López-Requena, Robbe Naert, Brecht Steelant, Katrien Luyts, Cristina Plata, Vanessa De Vooght, Jeroen A J Vanoirbeek, Victor M Meseguer, Thomas Voets, Julio L Alvarez, Peter W Hellings, Peter H M Hoet, Benoit Nemery, Miguel A Valverde, Karel Talavera
Lipopolysaccharides (LPS), the major components of the wall of gram-negative bacteria, trigger powerful defensive responses in the airways via mechanisms thought to rely solely on the Toll-like receptor 4 (TLR4) immune pathway. Here we show that airway epithelial cells display an increase in intracellular Ca(2+) concentration within seconds of LPS application. This response occurs in a TLR4-independent manner, via activation of the transient receptor potential vanilloid 4 cation channel (TRPV4). We found that TRPV4 mediates immediate LPS-induced increases in ciliary beat frequency and the production of bactericidal nitric oxide...
October 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29035122/homogeneity-of-aerosol-deposition-and-mucociliary-clearance-are-improved-following-ivacaftor-treatment-in-cystic-fibrosis
#13
William D Bennett, Kirby L Zeman, Beth L Laube, Jihong Wu, Gail Sharpless, Peter J Mogayzel, Scott H Donaldson
BACKGROUND: Using planar gamma scintigraphy of inhaled radioaerosols, we have developed new analytical methods for assessing homogeneity of aerosol deposition and time-dependent particle clearance on a pixel-by-pixel basis, and applied them to a therapeutic cystic fibrosis (CF) study. METHODS: At baseline and 1 month after beginning treatment with ivacaftor, a cystic fibrosis transmembrane regulator modulator for CF patients with at least one copy of the G551D mutation (n = 13), initial deposition and subsequent mucociliary clearance (MCC) of radiolabeled particles ((99m)Technetium-sulfur colloid, 5 μm mass median aerodynamic diameter) inhaled under controlled breathing conditions were measured...
October 16, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28982736/an-epoxide-hydrolase-secreted-by-pseudomonas-aeruginosa-decreases-mucociliary-transport-and-hinders-bacterial-clearance-from-the-lung
#14
Kelli L Hvorecny, Emily Dolben, Sophie Moreau-Marquis, Thomas H Hampton, Tamer B Shabaneh, Becca A Flitter, Christopher D Bahl, Jennifer M Bomberger, Bruce D Levy, Bruce A Stanton, Deborah A Hogan, Dean R Madden
The opportunistic pathogen Pseudomonas aeruginosa colonizes the lungs of susceptible individuals by deploying virulence factors targeting host defenses. The secreted CFTR inhibitory factor (Cif) dysregulates the endocytic recycling of CFTR and thus reduces CFTR abundance in host epithelial membranes. We have postulated that the decrease in ion secretion mediated by Cif would slow mucociliary transport and decrease bacterial clearance from the lungs. To test this hypothesis, we explored the effects of Cif in cultured epithelia and in the lungs of mice...
October 5, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28965435/early-rescue-neopuff-for-infants-with-transient-tachypnea-of-newborn-a-randomized-controlled-trial
#15
Amani Mahmoud Osman, Rania Ali El-Farrash, Enas Hussein Mohammed
OBJECTIVE: To examine the efficacy of early continuous positive airway pressure (CPAP), delivered using a T-piece-based infant resuscitator (Neopuff) via a face mask, in reducing the severity and duration of transient tachypnea of the newborn (TTN) as well as testing a hypothesis suggesting that rapid clearance of fetal lung fluid to the circulation via CPAP would increase plasma B-type natriuretic peptide (BNP). METHODS: A randomized controlled trial (NCT01859533) was conducted on 64 late preterm/term neonates, delivered by cesarean section and presented by respiratory distress shortly after birth...
October 16, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28960179/effects-of-orally-ingested-arsenic-on-respiratory-epithelial-permeability-to-bacteria-and-small-molecules-in-mice
#16
Michael W Henderson, Jennifer H Madenspacher, Gregory S Whitehead, Seddon Y Thomas, Jim J Aloor, Kymberly M Gowdy, Michael B Fessler
BACKGROUND: Arsenic exposure via drinking water impacts millions of people worldwide. Although arsenic has been associated epidemiologically with increased lung infections, the identity of the lung cell types targeted by peroral arsenic and the associated immune mechanisms remain poorly defined. OBJECTIVES: We aimed to determine the impact of peroral arsenic on pulmonary antibacterial host defense. METHODS: Female C57BL/6 mice were administered drinking water with 0, 250 ppb, or 25 ppm sodium arsenite for 5 wk and then challenged intratracheally with Klebsiella pneumoniae, Streptococcus pneumoniae, or lipopolysaccharide...
September 28, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28947643/il-1%C3%AE-is-critical-for-resistance-against-highly-virulent-aspergillus-fumigatus-isolates
#17
Alayna K Caffrey-Carr, Caitlin H Kowalski, Sarah R Beattie, Nathan A Blaseg, Chanell R Upshaw, Arsa Thammahong, Hannah E Lust, Yi-Wei Tang, Tobias M Hohl, Robert A Cramer, Joshua J Obar
Heterogeneity amongst Aspergillus fumigatus isolates results in unique virulence potential and inflammatory responses. How these isolates drive specific immune responses and how this affects fungal-induced lung damage and disease outcome is unresolved. We demonstrate that the highly virulent CEA10 strain is able to rapidly germinate within the immune competent lung environment inducing greater lung damage, vascular leakage, and IL-1α release compared to the low virulent Af293 strain that germinates with lower frequency in this environment...
September 25, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28889999/humoral-immune-responses-during-asthma-and-influenza-co-morbidity-in-mice
#18
Laura A Doorley, Kim S LeMessurier, Amy R Iverson, Maneesha Palipane, Amali E Samarasinghe
Humoral immunity serve dual functions of direct pathogen neutralization and enhancement of leukocyte function. Antibody classes are determined by antigen triggers, and the resulting antibodies can contribute to disease pathogenesis and host defense. Although asthma and influenza are immunologically distinct diseases, since we have found that allergic asthma exacerbation promotes antiviral host responses to influenza A virus, we hypothesized that humoral immunity may contribute to allergic host protection during influenza...
December 2017: Immunobiology
https://www.readbyqxmd.com/read/28854668/current-and-future-therapies-for-pseudomonas-aeruginosa-infection-in-patients-with-cystic-fibrosis
#19
Wynne D Smith, Emmanuelle Bardin, Loren Cameron, Claire L Edmondson, Katie V Farrant, Isaac Martin, Ronan A Murphy, Odel Soren, Andrew R Turnbull, Natasha Wierre-Gore, Eric W Alton, Jacob G Bundy, Andrew Bush, Gary J Connett, Saul N Faust, Alain Filloux, Paul S Freemont, Andrew L Jones, Zoltan Takats, Jeremy S Webb, Huw D Williams, Jane C Davies
Pseudomonas aeruginosa opportunistically infects the airways of patients with cystic fibrosis and causes significant morbidity and mortality. Initial infection can often be eradicated though requires prompt detection and adequate treatment. Intermittent and then chronic infection occurs in the majority of patients. Better detection of P. aeruginosa infection using biomarkers may enable more successful eradication before chronic infection is established. In chronic infection P. aeruginosa adapts to avoid immune clearance and resist antibiotics via efflux pumps, β-lactamase expression, reduced porins and switching to a biofilm lifestyle...
August 1, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28831038/caesarean-section-is-associated-with-reduced-perinatal-cytokine-response-increased-risk-of-bacterial-colonization-in-the-airway-and-infantile-wheezing
#20
Sui-Ling Liao, Ming-Han Tsai, Tsung-Chieh Yao, Man-Chin Hua, Kuo-Wei Yeh, Chih-Yung Chiu, Kuan-Wen Su, Shih-Yin Huang, Chuan-Chi Kao, Shen-Hao Lai, Jing-Long Huang
The relationship between cesarean section (CS) and allergic disorders such as asthma and wheezing has been inconsistent, and the mechanisms for their connection remained largely unknown. We aimed to investigate whether CS is associated with infantile wheeze and to explore the connection between CS and several risk factors known to correlate with allergy development. Mononuclear cells were isolated from cord blood and assessed for cytokine responses by ELISA. Bacteria from nasopharyngeal specimens were identified with traditional culture methods...
August 22, 2017: Scientific Reports
keyword
keyword
112625
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"