View clinical trials related to Rhinitis, Allergic.
Filter by:Cysteinyl leukotrienes (CysLTs) play an important role in asthma. CysLTs exert most of their bronchoconstrictive and pro-inflammatory effects through activation of the CysLT1-r. As allergic rhinitis appears to be a predisposing factor in the development of asthma and as CysLT-receptors seem to be implicated in the first steps of asthma manifestations, we think it would be of interest to determine if the CysLT1-r is a key mediator in the progression from allergic rhinitis to asthma. We believe it would be interesting to study the expression of the CysLT1-r Our goal is to assess baseline, as well as variations following allergen bronchoprovocations, in the expression of the CysLT1-r in mild asthmatic subjects compared with non asthmatic subjects with allergic rhinitis. Our hypothesis is that there will be a higher baseline expression of the CysLT1-r in asthmatic subjects compared with allergic rhinitis subjects and that allergen bronchoprovocations will induce an increase in the expression of the CysLT1-r in both groups.
The study objective is to investigate the efficacy of levocetirizine in reducing symptoms associated with seasonal allergic rhinitis and in improving rhinitis-related Quality of Life
This is an 8 day, randomised, double blind, 3-way crossover trial of repeat doses of intranasal GSK256066 and fluticasone propionate in the Vienna Challenge Chamber in subjects with seasonal allergic rhinitis (SAR). Approximately 60 subjects will be selected for enrolment with the intention of acquiring at least 48 evaluable subjects. Laboratory safety assessments, 12-lead electrocardiograph (ECG), vital signs and adverse event enquiries will be made throughout the study. Nasal examination, symptom scores, nasal lavage, nasal scrape and allergen challenge assessments will also be performed at various time points throughout the study.
This study is an 8 day, randomised, double blind, 2-way crossover trial of repeat doses of intranasal GSK256066 and azelastine hydrochloride in the Vienna Challenge Chamber in subjects with seasonal allergic rhinitis (SAR). Laboratory safety assessments, 12-lead electrocardiograph (ECG), vital signs and adverse event enquiries will be made throughout the study. Nasal examination, symptom scores, and allergen challenge assessments will also be performed at various time points throughout the study.
This study is designed to assess the safety and tolerability of single, escalating oral doses and repeat oral doses (7 days, once daily) of GSK835726 in healthy male subjects
This research is being done to study the effects of the drug omalizumab (Xolair) in people with cat allergies. The investigators will use omalizumab to study changes in the cells in the nose, skin and blood that cause allergies. The investigators predict that cells in the blood will be effected before cells in the nose or skin.
The primary objective of this study is to explore the efficacy of Nasonex (mometasone furoate nasal spray) in comparison with placebo in improving the quality of life of subjects with moderate to severe persistent allergic rhinitis and intermittent asthma. A secondary objective is to evaluate the efficacy of Nasonex in relieving the subject's symptoms of allergic rhinitis and asthma.
This study will investigate whether a single dose QAX576 (an interleukin-13 monoclonal antibody) gives protection against a model of hayfever
Asthma is an inflammatory condition of the airways in the lungs that results in obstruction of airflow in those with the condition. The disease continues to be a major worldwide health care problem and its prevalence continues to increase annually. In 2005, 20 million people were diagnosed with asthma. The disease causes significant morbidity and accounts for 5,000 deaths annually. Between 1980 and 1994 the prevalence of asthma increased 74% in the United States and, in children under age 5, the prevalence increased by 160%. The allergic etiology of airway inflammation associated with asthma is established. Bronchial washings of asthmatic subjects are most often characterized by eosinophils, mast cells, and cytokines that are associated with the Th2 (allergic) phenotype. Similarly, IgE plays a pivotal role in airway inflammation of asthmatic subjects when allergens that cross-link IgE bound to mast cells in the airways cause the release of histamine and other inflammatory mediators. The association of asthma and the IgE mediated allergic phenotype is well established and up to 70% of asthmatics also suffer from allergic disease. Adequately treated asthma often has minimal impact of quality of life but diagnosis and proper treatment is often delayed, resulting in increased missed school days, emergency room visits, and otherwise preventable degradation in quality of life. It would therefore be highly useful to identify a biomarker that can be used to assist in the diagnosis of asthma or to identify subjects at higher risk of developing allergic disease or asthma in the future. Efforts at identifying a genetic marker for the early diagnosis of asthma have been unsuccessful, mainly due to the complexity of the pathogenesis of the disease. Atrial natriuretic factor is a pro-hormone precursor for 4 natriuretic peptide hormones including atrial natriuretic peptide (ANP). ANP's effects on the cardiovascular system are well characterized. Less well understood is the role these hormones play in immune regulation. Recent studies have demonstrated a role for ANP in the regulation of immune function: ANP induces release of histamine from mast cells and macrophages, stimulates migration of neutrophils, enhances the cytotoxic activity of natural killer (NK) cells, and stimulates TNF-β production. Human dendritic cells express ANP receptors (GC-a) which polarize CD4+ cells towards a Th2 phenotype. Since allergic rhinitis and asthma are associated with a Th2 phenotype, it is possible that elevated levels of ANP can be used to predict asthma severity or to predict future predilection to atopic disease. There are a number of ANP gene polymorphisms that have been studied and found to be associated with renal disease, heart disease, hypertension and diabetes. Several studies have investigated the potential role of these polymorphisms in cardiovascular disease and have found association between polymorphisms of the ANP gene and left ventricular remodeling, hypertension, renal disease, diabetes, and increased risk of ischemic stroke. To our knowledge, no studies evaluating the role of ANP polymorphisms in allergic disease have been performed. The goal of this research proposal is to evaluate whether ANP levels can be utilized to assist in diagnosis of asthma and in the prediction of asthma severity. Additionally, we will investigate the potential effect of polymorphisms in the ANP gene on asthma severity and thus serve as a useful genetic marker to predict future risk of atopy and asthma.
The purpose of this study is to determine whether olopatadine nasal spray is safe and effective when used for up to one year by patients with perennial allergic rhinitis.