Treg cells or regulatory T cells constitute a large population of cellular infiltrate in atopic/allergic inflammation and a dysregulated immune response appears to be an important pathogenetic factor. Cardinal events during allergic inflammation can be classified as activation, organ-selective homing, survival and reactivation, and effector functions of immune system cells. T cells are activated by aeroallergens, food antigens, autoantigens, and bacterial exotoxins superantigens in allergic inflammation. They are under the influence of the skin, lung, or nose-related chemokine network and show organ-selective homing. (more…)
Allergen-specific immunotherapy is highly effective in the treatment of IgE-mediated allergy diseases such as rhinitis, conjunc ...
The induction of immune tolerance and specific immune suppression are essential processes in the control of immune responses. R ...
The intracellular forkhead winged transcription factor Foxp3 (forkhead box P3) appears to be specifically expressed by naturall ...
An emerging concept is that pro-inflammatory signals lead to loss of Regulatory T Cells (Treg) function. Pasare and Medzhitov ( ...
Regulatory T cells Treg (picture above) is the existence of suppressor cells, which limit ongoing immune responses and prevent ...
The intracellular forkhead winged transcription factor Foxp3 (forkhead box P3) appears to be specifically expressed by naturally occurring Treg cells, particularly in mice, although in humans there is evidence of upregulation of Foxp3 in all T cells on activation. Foxp3 is required for the development and function of naturally occurring regulatory t cells (treg) and expression is sufficient to convert non-regulatory CD4+CD25T cells into cells with regulatory activity. Conversion of peripheral CD4+CD25 naive T cells to Foxp3+CD4+CD25 foxp3+ Treg cells can be induced by TGF-ß. In a murine asthma model, these TGF-ß-induced Treg prevented house-dust mite-induced allergic pathogenesis or infection pathogenesis in lungs. A single independent report has suggested that IL-4 and IL-13 also induce Foxp3+CD25+ Treg from CD4+CD25precursors. (more…)
Regulatory T cells Treg (picture above) is the existence of suppressor cells, which limit ongoing immune responses and prevent ...
An emerging concept is that pro-inflammatory signals lead to loss of Regulatory T Cells (Treg) function. Pasare and Medzhitov ( ...
Treg cells or regulatory T cells constitute a large population of cellular infiltrate in atopic/allergic inflammation and a dys ...
The induction of immune tolerance and specific immune suppression are essential processes in the control of immune responses. R ...
Allergen-specific immunotherapy is highly effective in the treatment of IgE-mediated allergy diseases such as rhinitis, conjunc ...
IgE plays an important role in allergic asthma. Reducing IgE in the airway mucosa should reduce airway inflammation. Omalizumab has significant anti-inflammatory effect and reduces serum and airway IgE, but IgE or eosinophils may not be causally linked to airway bronchial hyperresponsiveness to methacholine in mild to moderate asthma. (more…)
Treatment with omalizumab has been shown to reduce serum free IgE concentrations and to have beneficial effects on allergic airway ...
Anti-IgE therapy could be particularly beneficial for patients with concomitant asthma and rhinitis as it targets a common fact ...
Patients with severe persistent asthma who are inadequately controlled despite Global Initiative for Asthma (GINA) 2002 step 4 ther ...
Tumour Necrosis Factor is a pro-inflammatory cytokine implicated in the pathogenesis of asthmatic airway inflammation, hyper-react ...
Tumour necrosis factor alpha (TNF-a) is a major therapeutic target in a range of chronic inflammatory disorders involving neutr ...
Airway hyper-responsiveness in asthma may involve smooth muscle growth, a manifestation of airway remodelling. The involvement of inflammatory cells in the induction of airway smooth muscle growth was studied in vivo and ex vivo in a brown Norway rat model of asthma. Transfer of CD4 + T lymphocytes from ovalbuminsensitized animals induced an increase in airway smooth muscle mass in naive animals upon repeated ovalbumin challenge. Ex vivo, coculture of antigen-stimulated CD4 + T cells and airway smooth muscle cells led to myocyte proliferation and prolonged T-cell survival. (more…)
Vascular Endothelial Growth Factor (VEGF), originally described as a vascular permeability factor generating tissue oedema, has be ...
Toll-like receptors (TLRs) act as receptors for numerous stimuli of immune cells, including bacterial cell wall constituents (l ...
A role for Leukotriene B4 in the induction of airway hyper-responsiveness was explored through the use of transgenic mice defic ...
IgE plays an important role in allergic asthma. Reducing IgE in the airway mucosa should reduce airway inflammation. Omalizumab has ...
Eosinophil infiltration of the mucosa is a feature of asthmatic airways. Their adhesion to bronchial epithelial cells has been ...
Leukotrienes are present in increased amounts in exhaled breath condensate (EBC) in patients with asthma. So far, no data have been reported about leukotriene levels in non-asthmatic patients with Seasonal Allergic Rhinitis. The aim of the study was to find out whether the leukotriene levels in exhaled breath condensate were increased in the non-asthmatic adult patients with Seasonal Allergic Rhinitis both during and after the pollen season in comparison with healthy controls, and to assess changes in leukotriene levels after the pollen season. Twentynine non-asthmatic adult patients with Seasonal Allergic Rhinitis and 50 healthy non-smoking controls underwent measurement of exhaled leukotrienes in the exhaled breath condensate during and after the pollen season. Spirometry, skin-prick tests and total IgE were also evaluated. (more…)
Some features seem to be common to severe asthma and Chronic Obstructive Pulmonary Disease with reversibility of airflow limita ...
A role for Leukotriene B4 in the induction of airway hyper-responsiveness was explored through the use of transgenic mice defic ...
Seasonal allergic rhinitis is stimulated by an allergic reaction of human body to pollen and spores. This is much depending on ...
Adjusting the inhaled glucocorticoid dose based on indices of airway inflammation has been proposed as a means of achieving more ef ...
Treating allergic rhinitis may have a downstream effect on concomitant asthma and this may be due to attenuation of the underlying ...
Otitis media with effusion is a chronic inflammatory disease of the middle ear space characterized by the accumulation of fluid. Previous investigations have suggested that the immunopathological mechanism underlying the development of middle ear effusion in allergy patients largely involves the effects of Th2 mediators. The investigators set out to determine whether the middle ear compartment may be a component of the united airways in allergic disease by comparing the inflammatory profiles of the middle ear with those of the upper airway. Middle ear effusions, torus tubaris (Eustachian tube mucosa at the nasopharyngeal orifice) and adenoidal tissue biopsies were obtained from 45 patients undergoing simultaneous tympanostomy tube placement for Otitis media with effusion and adenoidectomy for adenoid hypertrophy. (more…)
An allergic patient’s history may point the clinician’s assessment to a specific area or organ system during allergy testing. In ge ...
If you have sinusitis, one of the displeasing aspects of sinusitis is dizziness condition that comes with it. Symptoms of sin ...
Perhaps one day you have experienced chronic fatigue, insomnia, tender points and pain in your muscle all over your body? Do no ...
The immunologic mechanisms of sublingual immunotherapy are less established. In Cochrane analysis, the authors concluded that t ...
Treg cells or regulatory T cells constitute a large population of cellular infiltrate in atopic/allergic inflammation and a dys ...
It is clear from the results of large epidemiologic studies that while atopy is a major risk factor for asthma, it is usually not sufficient by itself to drive the disease process to chronicity, as less than 25% of atopics develop persistent asthma. The situation in childhood is further complicated by an additional series of development factors, related to postnatal maturation of respiratory function. (more…)
In the Tucson CRS study, about 50% of young children experienced a period of recurrent wheezing and/or coughing in the first 6 ...
Natural history studies with the following design features provide a firm epidemiologic foundation for risk factor assessments and ...
Atopic Dermatitis is considered to be one of the first manifestations in the atopic march. The aim of this study was to investi ...
Asthma is a complex syndrome rather than a single disease entity. Different phenotypes with varying prognosis and determinants have ...
More severe asthma can persist from childhood into adulthood without remission. Another important tendency in the natural histo ...
After nasal allergen challenge, substance P and CGRP are released into nasal secretions of atopic patients . In allergic rhinitis patients, but not in normal control subjects, exogenous substance P induces nasal obstruction. (more…)
Treatment with omalizumab has been shown to reduce serum free IgE concentrations and to have beneficial effects on allergic airway ...
Nerve fibers containing a variety of neuropeptides, including substance P and CGRP, have been demonstrated in human skin. Intra ...
This method of Acoustic Rhinometry is performed by doing the cross-sectional areas of the nasal measures by sending a sound pulse t ...
Allergic rhinitis is an inflammatory nasal disorder in which a range of different cells participate. A variety of approaches ha ...
Spring has finally arrived. With it comes many form of spring allergies. I am a victim of the year along of and spring allergies. F ...
Sulfur Dioxide
The effects of SO2 have been extensively reviewed. Total emergency room visits for respiratory problems and increased hospital admission rates have been linked with increased ambient exposure to SO2. In children, decreased lung function has been linked to increases in ambient sulfur dioxide levels and the likelihood (more…)
Recent data show that monitoring of exposure to acid aerosols is widespread in North America, the associations in a joint statement ...
The geographical variation in the prevalence of asthma in children does not coincide with variations in air pollution levels. The i ...
Environmental pollution not only makes asthma worse we are, but could make asthma inhalers were less effective. It is the conclu ...
The Misery Of Allergies As a young boy I was one of the kids who had to stay indoors to avoid the misery that came with snee ...
The two strongest risk factors for asthma in childhood are a family history and immediate hypersensitivity to common allergens. ...
Do you have occupational asthma or the condition where your asthma is triggered or even worsen when you are in your office or job? You are not alone in this situation. More than 10 million workers are exposed to allergens agents in their work environment, based on data from the Occupational Safety & Health Administration. Occupational asthma or work asthma or workplace asthma related to job/work is about 15 % from all kind of asthma altogether. Are you one of them? (more…)
Exposure to different gases air pollutants and substances at work is responsible for about one in seven of severe asthma attack ...
About twenty percent of patients who have common allergic rhinitis are also having perennial allergic rhinitis symptoms. This f ...
Have you ever stepped into a crowded elevator, inhaled a whiff of fragrance and suddenly found yourself struggling to breathe? ...
Sinusitis is one inconvenience disease condition that many people had. Many drugs and antibiotics that are prescribed by your docto ...
When seeking information on asthma help, many people first want to know what it is. Then they want to know what is causing them to ...