Pilot Study of Pioglitazone for the Treatment of Moderate to Severe Asthma in Obese Asthmatics (GLITZ Asthma)
Asthmatics who are significantly overweight tend to have more severe symptoms, more flare ups, and are more likely to have poorly-controlled asthma when compared to other asthmatics.
Researchers believe this occurs because excess adipose tissue (fat) in the body can cause higher-than-normal levels of leptin and lower-than-normal levels of adiponectin in the blood.
The researchers of this study are testing a medication called pioglitazone in overweight asthmatics because they believe it can help regulate leptin and adiponectin and that this may improve symptoms of asthma.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Randomized, Placebo-Controlled Pilot Study of Pioglitazone for the Treatment of Moderate to Severe Asthma in Obese Asthmatics|
- Airway Reactivity [ Time Frame: 12 weeks ]Presence and degree of airway hyperresponsiveness assessed by methacholine challenge test. PC20= Methacholine dose at wich the FEV1 deops by > 20% from pre-methacholine baseline values.
- FEV1 % Predicted [ Time Frame: 12 weeks ]
- Juniper Asthma Control Questionnaire [ Time Frame: 12 weeks ]The Juniper Asthma Control Questionnaire is a validated scale ranging from 0 to 6. Higher scores represent poorer asthma control. Values > 1.5 are compatible with poorly controlled asthma
- Exhaled Nitric Oxide Ppb [ Time Frame: 12 weeks ]
|Study Start Date:||October 2009|
|Study Completion Date:||April 2012|
|Primary Completion Date:||April 2012 (Final data collection date for primary outcome measure)|
|Active Comparator: 1||
pioglitazone tablets: 30 mg/day for 2 weeks; then increased to 45 mg/day until week 12 (approximately 3 months)
Other Name: Actos
|Placebo Comparator: 2||
matching placebo (inert tablet)
Participants in this study will be randomly assigned (like the flip of a coin) to pioglitazone or a placebo (an inactive pill). They will be given study medication to take everyday for 12 weeks (3 months).
Participants will complete a number of asthma-related questionnaires and a variety of pulmonary function tests. Participants will undergo physical exams, an electrocardiogram, and blood sampling to measure leptin, adiponectin, markers of inflammation, blood cell counts, glucose levels, BNP hormone levels, and liver function.
To monitor participants throughout the study, follow-up visits will be done at 2, 6, and 12 weeks after starting study drug. At these visits many of the pulmonary function tests and questionnaires will be repeated.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00634036
|United States, Pennsylvania|
|University of Pittsburgh|
|Pittsburgh, Pennsylvania, United States, 15213|
|United States, Vermont|
|University of Vermont|
|Colchester, Vermont, United States, 05446|
|Principal Investigator:||Fernando Holguin, MD, MPH||University of Pittsburgh|
|Principal Investigator:||Anne E. Dixon, MD||University of Vermont|