Active clinical trials for "Rhinitis, Allergic"

The aim of the study is to evaluate the effects of Bilastine on patients' attention and reactivity levels by measuring psychophysical performance at a F1-high speed simulator driving test.

The investigators propose the development of a range of nasal spray challenge models to study the way the nose can respond to different types of nasal challenge that elicit different forms of inflammation. The investigators will carry out nasal challenge with bacterial and viral components and allergens. In this way the nasal upper respiratory tract mucosa is challenged with stimuli of the immune system, causing various types of inflammation. Samples will be taken by blotting the nostril surface and by scraping off tiny surface samples. The nose will be sprayed with a substance that is a single part of a bacteria or virus, or with an allergen. The material delivered by nasal spray is of high purity and is sterile, containing no live bacteria or viruses. The nasal spray substance contains molecular patterns that are recognised as foreign by the immune system, and at the right dose should stimulate the immune system, causing mild nasal inflammation. The study employs noninvasive methods of sampling using absorptive strips. These strips look and feel like tissue paper, and are applied to each nostril for a period of 1 min. A few pinhead-sized tissue samples are taken from inside the nose, using a small disposable sterile plastic probe that has a tiny scoop on its end. In the nasal lining fluid and tissue samples, measurement will taken of a range of molecules and cells that protect against infections and help the immune response. By spraying the nose with a challenge agent in this manner, the nasal immune response can be assessed, which can help us better understand how the human immune system cells and molecules respond to bacteria and viruses. In the future, this may allow the testing of new drugs and vaccines, by seeing if they decrease or stop the inflammation after the nasal challenge.

This study will be a single center, open-label, randomized, single dose, in the fasted condition and 2-way crossover study to evaluate the pharmacokinetics, the safety and tolerability of levocetirizine oral solution 5 mg and cetirizine dry syrup 10 mg in Japanese healthy male subjects. Approximately 20 subjects will receive both treatments of levocetirizine oral solution 5 mg and cetirizine dry syrup 10 mg in the design. Serial pharmacokinetic samples will be collected and safety assessments will be performed following each dose. The primary objective of the study is to demonstrate the bioequivalence of levocetirizine in plasma, when given as levocetirizine oral solution 5 mg relative to cetirizine DS 10 mg in Japanese healthy male subjects.

While allergen specific immunotherapy (SIT) is highly effective for allergic diseases in children, the underlying immunological mechanisms are unclear. Regulatory T (Treg) cells may be crucial in induction of tolerance. Our aim was to investigate the role of CD4+CD25+Foxp3+ T cells and IL-10-secreting type I T regulatory (Tr1) cells in the response to one year of cluster SIT to Dermatophagoides pteronyssinus for allergic rhinitis in children. CD4+CD25+Foxp3+regulatory T cells and IL-10-secreting type I T regulatory (Tr1) cells were analyzed in children allergic to Dermatophagoides pteronyssinus during one year cluster specific immunotherapy (SIT) in a prospective and randomized study. Peripheral blood mononuclear cells (PBMCs) were collected from 25 children receiving SIT and 21 receiving pharmacotherapy. The frequencies of CD4+CD25+Foxp3+ T cells and allergen-specific IL-10+IL-4-, IFN-γ+IL-4-, IL-4+IFN-γ-CD4+ T cells were measured by flow cytometry. Production of IL-4, IFN-r, and IL-10 in supernatants from allergen-stimulated PBMC culture was measured by ELISA. Finally, the suppressive effect of CD4+CD25highTreg cells from both groups was estimated.

The purpose of this study is to see if a new nasal spray can reduce the signs and symptoms of allergic rhinitis (hayfever). Subjects' participation in the study will last approximately 4 to 6 weeks, and each of three study visits during that time will last a few hours. Subjects will be required to have several tests done including allergy and breathing tests. They will be exposed to the item they are allergic to and will have small paper discs put in their noses. Subjects will also have the inside of their noses examined and will be asked questions about the level of their allergy symptoms.

The primary goal of this study is to characterize the pharmacokinetics of doxylamine succinate in children ages 2 to < 18 years. Once characterized, these pediatric pharmacokinetic data will be pooled with historical adult PK data from other studies to assess whether the existing Over-the-Counter (OTC)doses provide comparable systemic drug exposure as that associated with efficacy in adults.

Evaluation of the effect of fluticasone propionate vs placebo applied as nasal spray on the increase of allergen-specific serum IgE levels following nasal exposure to recombinant allergens. Nasal sprays will be applied for four weeks starting two weeks before nasal provocation and serum IgE levels will be followed during eight weeks after nasal provocation.

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.

We hypothesize that specifically selected probiotics can alleviate symptoms of allergy in lactose tolerant individuals. Two strains of probiotics, Lactobacillus rhamnosus GR-1, and Bifidobacterium adolescentis 7007-05 will be used to create a yogurt product. Additionally a non-probiotic yogurt product will also be made as a placebo. Allergy sufferers will be asked to consume one of the two types of yogurts (blinded) for two months. During the two months there will be 3 sampling days, for blood samples and nasal lavage samples. Additionally Mini Rhinoconjunctivitis Quality of Life Questionnaires will be filled out weekly over the two months. After the two months of perceived responses as well sample analysis we should have a better idea of how these specific probiotic effect the immune system and allergies.

Comparative study on clinical efficacy and safety of levocetirizine and desloratadine as measured by the subject's satisfaction/dissatisfaction after one week of treatment