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 ...
The management of asthma in the community involves patient education to avoid the triggers, doubling the dose of inhaled steroids and increasing the use of rescue medications during an exacerbation in order to prevent unnecessary hospital visits. This randomized, controlled study looks at whether doubling the dose of inhaled corticosteroid in isolation is effective when asthma deteriorates. (more…)
This study was similar to the study of Harrison and colleagues, which looked at doubling the dose of inhaled corticosteroid dur ...
The guidelines for asthma management recommend the use of regular inhaled corticosteroid in patients with mild persistent asthma, b ...
The role of oral and inhaled corticosteroids in the management of acute asthma is well known. This study compared the effects of in ...
For most patients, asthma is not controlled as defined by guidelines; whether this is achievable has not been prospectively stu ...
Patients with severe persistent asthma who are inadequately controlled despite Global Initiative for Asthma (GINA) 2002 step 4 ther ...
The symptoms of asthma occur together with variations in the diameter of medium- size airways such that it is increasingly difficult to exhale. Narrowing of the airways can occur because of smooth muscle contraction, edema or swelling of the wall, or increased mucus in the airways. However, it is increasingly clear that the pathologic event underlying most cases of asthma is acute inflammation of the airway walls. (more…)
There are other signs and symptoms of asthma. People with asthma can be feeling irritable because of asthma discomfort. Some si ...
IgE plays an important role in allergic asthma. Reducing IgE in the airway mucosa should reduce airway inflammation. Omalizumab has ...
Exercise-induced asthma is a feeling of shortness of breath, with the presence of cough, wheezing, and chest tightness after physic ...
The two strongest risk factors for asthma in childhood are a family history and immediate hypersensitivity to common allergens. ...
Vascular Endothelial Growth Factor (VEGF), originally described as a vascular permeability factor generating tissue oedema, has be ...
Antihistamines have been shown to be effective in seasonal allergic rhinitis and chronic idiopathic urticaria. They improve quality of life scores, acute inflammatory response markers in atopic dermatitis asthma and symptom scores. Newer histamine H1-receptor antagonists may also have an antiplatelet-activating factor effect and are equally effective in seasonal allergic rhinitis. The antileukotrienes were developed in the 1980s. The first compounds of this novel class of anti-asthma drugs were registered in the second half of the 1990s. The mechanism of action of the cysteinyl leukotriene receptor antagonists (LTRAs) is based on counteracting the effects of cysteinyl leukotrienes at their receptor site (CysLT1 receptor) within the airways. (more…)
A variety of proinflammatory cells, mediators, and cytokines orchestrate the development of airway hyperresponsiveness, which r ...
Montelukast has proven efficacy in the treatment of chronic asthma and seasonal allergic rhinitis, but it has not been evaluate ...
Leukotrienes can be found in the airway and urine following both spontaneous exacerbations of asthma and acute exposure to bron ...
Two main strategies have been developed to block the effects of cysteinyl leukotrienes in the airway. One method is to use drug ...
A role for Leukotriene B4 in the induction of airway hyper-responsiveness was explored through the use of transgenic mice defic ...
There have been concurrent increases in the prevalence of obesity and asthma in recent years in New Zealand and other countries. Two cross-sectional surveys performed in 1989 and 2000 were used to test this association in children of mean age 11.7 years. BMI was calculated as weight/height 2 (kg/m 2 ) and obesity and overweight defined according to an international standard. Standard questions were used to measure the prevalence of asthma symptoms. (more…)
This study investigated the possibility of sex-specificity for the association of obesity and asthma using objective measures of Bo ...
There is increasing evidence relating body mass index to the prevalence of asthma and incidence of asthma in children and adult ...
During recent decades there has been extensive epidemiological research to explore the increasing prevalence of asthma and alle ...
The prevalence of asthma increases with increasing levels of Dichlorodiphenyldichloroethylene (DDE). However, the effect of early-l ...
Breast milk contains a variety of bioactive substances, among them soluble CD14 (sCD14), which plays an important role in innat ...
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 ...
Asthma is a continuing problem for healthcare, particularly in the industrialized world. Some 150 million people are estimated to suffer from asthma worldwide, with 5.2 million sufferers in the UK. Hospital admissions for asthma number 69 000 per annum in the UK, including 28 500 children. Approximately 1400 people die from asthma in the UK annually, of whom over 30% are under the age of 65. Asthma costs the UK National Health Service almost £90 million per annum (statistics from Asthma UK, http://www.asthma.org.uk). (more…)
Vascular Endothelial Growth Factor (VEGF), originally described as a vascular permeability factor generating tissue oedema, has be ...
Airway hyper-responsiveness in asthma may involve smooth muscle growth, a manifestation of airway remodelling. The involvement ...
Airway remodelling is considered to be of major importance in the pathology of asthma, with subepithelial basement membrane thi ...
Contact of pathogens with the innate immune system will most frequently occur at epithelia, and the biology of the airway epitheliu ...
Some features seem to be common to severe asthma and Chronic Obstructive Pulmonary Disease with reversibility of airflow limita ...
Parents are usually the ones who are greatly affected, when they see their child having an asthma attack. It bothers them so much especially when they can do nothing but comfort their child. It is certainly very painful for any parent to see their child suffering. The question ‘Do children grow out of asthma?’ is often asked by parents to their child’s physician. (more…)
If you suspect that certain foods trigger wheezing or asthma symptoms in your child, your first action should be a consultation ...
No cure is available for food allergy and food-allergic patients and their families are therefore burdened with the need to con ...
After long-term avoidance of the offending foods, many children outgrow their food allergies. Subsequent periodic challenge wit ...
The most important aspect of managing food allergies in children and babies is to be sure that the developing child has each an ...
Oral allergy syndrome is one form of allergy that body have allergic reaction to fruits and vegetables. Based on statistics fa ...
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. ...