Cough and Other Reflexes on Irritation of Airway Mucosa in Man

1996 ◽  
Vol 9 (5-6) ◽  
pp. 285-292 ◽  
Author(s):  
T. Nishino ◽  
Y. Tagaito ◽  
S. Isono
Keyword(s):  
Airway Mucosa

scholarly journals Picornavirus-Induced Airway Mucosa Immune Profile in Asymptomatic Neonates

2015 ◽  
Vol 213 (8) ◽  
pp. 1262-1270 ◽  
Author(s):  
Helene M. Wolsk ◽  
Nilofar V. Følsgaard ◽  
Sune Birch ◽  
Susanne Brix ◽  
Trevor T. Hansel ◽  
...  
Keyword(s):  
Immune Profile ◽  
Airway Mucosa

scholarly journals Characterization of epithelial cells, connective tissue cells and immune cells in human upper airway mucosa by immunofluorescence multichannel image cytometry: a pilot study

2020 ◽  
Author(s):  
Aris I. Giotakis ◽  
Jozsef Dudas ◽  
Rudolf Glueckert ◽  
Daniel Dejaco ◽  
Julia Ingruber ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Chronic Rhinosinusitis ◽  
Immune Cells ◽  
Upper Airway ◽  
Image Cytometry ◽  
Cell Types ◽  
Epithelial Layer ◽  
Double Positive ◽  
Airway Mucosa ◽  
Single Positive

AbstractEpithelial, connective tissue and immune cells contribute in various ways to the pathophysiology of chronic rhinosinusitis (CRS). However, data of their distribution in upper airway mucosa are sparse. We aimed to provide quantitative, purely informative data on the distribution of these cell lineages and their coexpression patterns, which might help identifying, e.g., cells in the epithelium undergoing through epithelial–mesenchymal transition (EMT). For this purpose, we used immunofluorescence multichannel image cytometry (IMIC). We examined fixed paraffin-embedded tissue samples (FFPE) of six patients with chronic rhinosinusitis (CRS) and of three patients without CRS (controls). The direct-conjugated antibodies pancytokeratin, vimentin and CD45/CD18 were used for coexpression analysis in epithelial layer and lamina propria. Image acquisition and analysis were performed with TissueFAXS and StrataQuest, respectively. To distinguish positive from negative expression, a ratio between cell-specific immunostaining intensity and background was developed. Isotype controls were used as negative controls. Per patient, a 4.5-mm2 tissue area was scanned and a median of 14,875 cells was recognized. The most common cell types were cytokeratin-single-positive (26%), vimentin-single-positive (13%) and CD45/CD18-single-positive with CD45/CD18–vimentin-double-positive cells (29%). In the patients with CRS, CD45/CD18-single-positive cells were 3–6 times higher compared to the control patients. In the epithelial layer, cytokeratin–vimentin-double-positive EMT cells were observed 3–5 times higher in the patients with CRS than in the control patients. This study provided quantitative data for the distribution of crucial cell types in CRS. Future studies may focus on the distribution and coexpression patterns of different immune cells in CRS or even cancer tissue.

Role of Dendritic Cells in the Airway Mucosa

2013 ◽  
Vol 33 (1) ◽  
pp. 45
Author(s):  
Seok Hyun Cho
Keyword(s):  
Dendritic Cells ◽  
Airway Mucosa

Effect of neuropeptides released from sensory nerves on blood flow in the rat airway microcirculation

1992 ◽  
Vol 72 (4) ◽  
pp. 1563-1570 ◽  
Author(s):  
G. Piedimonte ◽  
J. I. Hoffman ◽  
W. K. Husseini ◽  
W. L. Hiser ◽  
J. A. Nadel
Keyword(s):  
Blood Flow ◽  
Substance P ◽  
Regional Blood Flow ◽  
Reference Sample ◽  
Left Ventricular ◽  
Sensory Nerves ◽  
Microvascular Blood Flow ◽  
Systemic Injection ◽  
Airway Mucosa ◽  
Stimulation Of

Stimulation of sensory nerves in the airway mucosa causes local release of the neuropeptides substance P and calcitonin gene-related peptide (CGRP). In this study we used a modification of the reference-sample microsphere technique to measure changes in regional blood flow and cardiac output distribution produced in the rat by substance P, CGRP, and capsaicin (a drug that releases endogenous neuropeptides from sensory nerves). Three sets of microspheres labeled with different radionuclides were injected into the left ventricle of anesthetized F344 rats before, immediately after, and 5 min after left ventricular injections of capsaicin, substance P, or CGRP. The reference blood sample was withdrawn from the abdominal aorta and was simultaneously replaced with 0.9% NaCl at 37 degrees C. We found that stimulation of sensory nerves with a low dose of capsaicin causes a large and selective increase in microvascular blood flow in the extrapulmonary airways. The effect of capsaicin is mimicked by systemic injection of substance P but not by CGRP, suggesting that substance P is the main agent of neurogenic vasodilation in rat airways.

Endothelin-1 Increases Airway Mucosa Blood Flow in the Pig

1990 ◽  
pp. 237-241 ◽  
Author(s):  
Régis Matran ◽  
Kjell Alving ◽  
Anette Hemsen ◽  
Jan M. Lundberg
Keyword(s):  
Blood Flow ◽  
Endothelin 1 ◽  
Airway Mucosa

scholarly journals Absorption across the nasal airway mucosa in house dust mite perennial allergic rhinitis

2002 ◽  
Vol 22 (1) ◽  
pp. 55-57
Author(s):  
Lennart Greiff ◽  
Morgan Andersson ◽  
Jenny Svensson ◽  
Per Wollmer ◽  
Stefan Lundin ◽  
...  
Keyword(s):  
Allergic Rhinitis ◽  
House Dust ◽  
House Dust Mite ◽  
Nasal Airway ◽  
Perennial Allergic Rhinitis ◽  
Airway Mucosa ◽  
Dust Mite

Effect of upper airway negative pressure on proprioceptive afferents from the tongue

1999 ◽  
Vol 86 (4) ◽  
pp. 1396-1401 ◽  
Author(s):  
A. Brancatisano ◽  
P. Davis ◽  
T. van der Touw ◽  
J. R. Wheatley
Keyword(s):  
Hypoglossal Nerve ◽  
Upper Airway ◽  
Rapid Onset ◽  
Firing Frequency ◽  
Tongue Muscle ◽  
Airway Mucosa ◽  
Afferent Fibers ◽  
Before And After ◽  
Proprioceptive Afferents ◽  
Passive Stretch

We examined whether receptors in the tongue muscle respond to negative upper airway pressure (NUAP). In six cats, one hypoglossal nerve was cut and its distal end was prepared for single-fiber recording. Twelve afferent fibers were selected for study on the basis of their sensitivity to passive stretch (PS) of the tongue. Fiber discharge frequency was measured during PS of the tongue and after the rapid onset of constant NUAP. During PS of 1–3 cm, firing frequency increased from 17 ± 7 to 40 ± 11 (SE) Hz ( P < 0.01). In addition, 8 of the 12 fibers responded to NUAP (−10 to −30 cmH2O), with firing frequency increasing from 23 ± 9 to 41 ± 9 Hz ( P < 0.001). In two fibers tested, the increase in firing frequency in response to NUAP was not altered by topical anesthesia (10% lignocaine) applied liberally to the entire upper airway mucosa. Our results demonstrate that afferent discharges from the hypoglossal nerve are elicited by 1) stretching of the tongue and 2) NUAP before and after upper airway anesthesia. We speculate that activation of proprioceptive mechanoreceptors in the cat’s tongue provides an additional pathway for the reflex activation of upper airway dilator muscles in response to NUAP, independent of superficially located mucosal mechanoreceptors.

Effect of cold and warm dry air hyperventilation on canine airway blood flow

1987 ◽  
Vol 62 (2) ◽  
pp. 526-532 ◽  
Author(s):  
E. M. Baile ◽  
R. W. Dahlby ◽  
B. R. Wiggs ◽  
G. H. Parsons ◽  
P. D. Pare
Keyword(s):  
Blood Flow ◽  
Left Lung ◽  
Tissue Temperature ◽  
Humid Air ◽  
Dry Air ◽  
Airway Mucosa ◽  
Anesthetized Dogs ◽  
Tracheal Tissue ◽  
Group 2 ◽  
Central Airway

Tracheobronchial blood flow increases with cold air hyperventilation in the dog. The present study was designed to determine whether the cooling or the drying of the airway mucosa was the principal stimulus for this response. Six anesthetized dogs (group 1) were subjected to four periods of eucapnic hyperventilation for 30 min with warm humid air [100% relative humidity (rh)], cold dry air (-12 degrees C, 0% rh), warm humid air, and warm dry air (43 degrees C, 0% rh). Five minutes before the end of each period of hyperventilation, tracheal and central airway blood flow was determined using four differently labeled 15-micron diam radioactive microspheres. We studied another three dogs (group 2) in which 15- and 50-micron microspheres were injected simultaneously to determine whether there were any arteriovenous communications in the bronchovasculature greater than 15 micron diam. After the last measurements had been made, all dogs were killed, and the lungs, including the trachea, were excised and blood flow to the trachea, left lung bronchi, and parenchyma was calculated. Warm dry air hyperventilation produced a consistently greater increase in tracheobronchial blood flow (P less than 0.01) than cold dry air hyperventilation, despite the fact that there was a smaller fall (6 degrees C) in tracheal tissue temperature during warm dry air hyperventilation than during cold dry air hyperventilation (11 degrees C), suggesting that drying may be a more important stimulus than cold for increasing airway blood flow. In group 2, the 15-micron microspheres accurately reflected the distribution of airway blood flow but did not always give reliable measurements of parenchymal blood flow.

A comparison of the effect of inhaled diuretics on airway reflexes in humans and guinea pigs

1992 ◽  
Vol 72 (2) ◽  
pp. 434-438 ◽  
Author(s):  
J. A. Karlsson ◽  
N. B. Choudry ◽  
C. Zackrisson ◽  
R. W. Fuller
Keyword(s):  
Citric Acid ◽  
Guinea Pig ◽  
Airway Obstruction ◽  
Guinea Pigs ◽  
Airway Resistance ◽  
Loop Diuretic ◽  
Airflow Obstruction ◽  
Respiratory Resistance ◽  
Airway Mucosa ◽  
Maximum Inhibition

The effects of nebulized diuretics on citric acid-induced cough and airway obstruction in guinea pigs and capsaicin-induced cough and increase in airway resistance in humans have been studied. Half-maximum inhibition of cough in the guinea pig was produced by 1.3 mM furosemide and 0.25 mM hydrochlorothiazide. Cough was inhibited by 78 +/- 9% by 3 mM furosemide (P less than 0.05) and 89 +/- 11% by 3 mM hydrochlorothiazide (P less than 0.01). At the same time, airway obstruction was inhibited by 50 +/- 9% (P less than 0.001) and 42 +/- 15% (P less than 0.05), respectively. Nebulized furosemide (3 mM) was without effect on the airway obstruction produced by inhaled histamine or acetylcholine in the guinea pigs. Intravenously administered furosemide (270 nmol/kg) did not affect citric acid-induced responses. In humans, aerosolized furosemide (9 mM) and hydrochlorothiazide (3.4 mM) reduced the percent increase in respiratory resistance from 22.1 +/- 3.7 and 15.6 +/- 3.4 to 10.5 +/- 4.9 and 9.4 +/- 3.3%, respectively (P less than 0.05), but were without effect on cough due to capsaicin. Thus both furosemide and hydrochlorothiazide inhibited airway obstruction in the guinea pig and reduced the capsaicin-induced increase in airway resistance in humans. However, whereas coughing was inhibited in the guinea pig, neither drug affected cough in humans. This difference in the action of the loop diuretic and thiazide, which interact differently with Na(+)-K(+)-Cl-transport within the airway mucosa, on the cough and airflow obstruction in guinea pig and humans supports the view that different sensory limbs are involved in these reflexes.(ABSTRACT TRUNCATED AT 250 WORDS)

A MODEL FOR ABSORPTION OF LOW-VOLATILE TOXICANTS BY THE AIRWAY MUCOSA

2001 ◽  
Vol 13 (10) ◽  
pp. 903-929 ◽  
Author(s):  
Per Gerde, Bobby R. Scott
Keyword(s):  
Airway Mucosa
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