The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.
Read our disclaimer for details.
We wish to understand the association of Vitamin A serum levels and Vitamin A receptor number and responsiveness in asthmatics. We believe that Vitamin A receptors may be less prevalent in asthmatics and their responsiveness decreased.
Condition or disease
We wish to define the association of asthma, vitamin A serum levels and vitamin A receptor number and responsiveness on circulating mononuclear cells. Asthma is a complex, heterogenous and often debilitating and potentially deadly disease. The causes for asthma are many, with susceptibility and resistance to treatment is poorly understood. Ultimately, looking at this disease from another angle such as the role of Vitamin A and/or receptors can help us learn more about the pathophysiology and treatment of asthma.
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study:
18 Years to 64 Years (Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Male or female Age 18-64
Patients with previously diagnosed asthma on inhaled corticosteroids, systemic steroids and/or long acting beta agonist (for a period of 6 mo to 5 years)