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- Klinische proef NCT00634036
Pilot Study of Pioglitazone for the Treatment of Moderate to Severe Asthma in Obese Asthmatics (GLITZ Asthma)
A Randomized, Placebo-Controlled Pilot Study of Pioglitazone for the Treatment of Moderate to Severe Asthma in Obese Asthmatics
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.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
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.
Studietype
Inschrijving (Werkelijk)
Fase
- Fase 2
Contacten en locaties
Studie Locaties
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Pennsylvania
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Pittsburgh, Pennsylvania, Verenigde Staten, 15213
- University of Pittsburgh
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Vermont
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Colchester, Vermont, Verenigde Staten, 05446
- University of Vermont
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
- Asthma diagnosed by a physician at least 1 year prior to study enrollment
- Poorly-controlled asthma at study enrollment
- Non smokers (stopped smoking at least 1 year ago) and limited life-time history of smoking
- Body mass index 30-60
- Responds to methacholine challenge test with PC20 of <16 mg/ml
- On a stable dose of inhaled corticosteroid for at least 4 weeks prior to study entry
- FEV1 >60% predicted
- Able to obtain weekly weights at home
Exclusion Criteria:
- Systemic steroids within the past 4 weeks
- Lung pathology other than asthma
- Other significant non-pulmonary co-morbidities such as: coronary artery disease, peripheral vascular disease, cerebrovascular disease, congestive heart failure with an ejection fraction <50%, liver disease or elevated liver enzymes at baseline, malignancy (excluding non-melanoma skin cancers), AIDS, renal failure with serum creatinine >3.0, or disorders requiring steroid treatment such as vasculitis, lupus, rheumatoid arthritis
- B-type natriuretic peptide (BNP) >400 pg/mL
- Pregnant or lactating
- Currently taking a beta blocker, a CYP2C8 inhibitor or inducer such as gemfibrozil or rifampin, a TZD (thiazolidinedione), or allergic to TZD
- Taking antioxidants or nutritional supplements (stable dose of calcium, vitamin D, or multivitamin is OK)
- Illicit drug use within the past year
- Current/active upper respiratory infection (if active URI, wait until asymptomatic for 1 week to enroll)
- Asthma exacerbation within the past 4 weeks (includes ER, urgent care, or hospital visits due to asthma resulting in an increase in asthma-related medications)
- Undergoing evaluation for sleep apnea, or plans to institute treatment for sleep apnea (patients on a stable treatment regimen for sleep apnea for the last 3 months will be allowed to participate)
- Clinically significant abnormalities present on screening 12-lead electrocardiogram
- Women of childbearing potential using oral contraceptives who are not willing to use a second method of contraception during the study
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Verviervoudigen
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Placebo-vergelijker: 2
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matching placebo (inert tablet)
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Actieve vergelijker: 1
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pioglitazone tablets: 30 mg/day for 2 weeks; then increased to 45 mg/day until week 12 (approximately 3 months)
Andere namen:
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
---|---|---|
Airway Reactivity
Tijdsspanne: 12 weeks
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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.
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12 weeks
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
---|---|---|
FEV1 % Predicted
Tijdsspanne: 12 weeks
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12 weeks
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Juniper Asthma Control Questionnaire
Tijdsspanne: 12 weeks
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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
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12 weeks
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Exhaled Nitric Oxide Ppb
Tijdsspanne: 12 weeks
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12 weeks
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Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Hoofdonderzoeker: Fernando Holguin, MD, MPH, University of Pittsburgh
- Hoofdonderzoeker: Anne E. Dixon, MD, University of Vermont
Publicaties en nuttige links
Algemene publicaties
- Hashimoto Y, Nakahara K. Improvement of asthma after administration of pioglitazone. Diabetes Care. 2002 Feb;25(2):401. doi: 10.2337/diacare.25.2.401. No abstract available.
- Lee KS, Kim SR, Park SJ, Park HS, Min KH, Jin SM, Lee MK, Kim UH, Lee YC. Peroxisome proliferator activated receptor-gamma modulates reactive oxygen species generation and activation of nuclear factor-kappaB and hypoxia-inducible factor 1alpha in allergic airway disease of mice. J Allergy Clin Immunol. 2006 Jul;118(1):120-7. doi: 10.1016/j.jaci.2006.03.021. Epub 2006 May 19.
- Dixon AE, Subramanian M, DeSarno M, Black K, Lane L, Holguin F. A pilot randomized controlled trial of pioglitazone for the treatment of poorly controlled asthma in obesity. Respir Res. 2015 Nov 26;16:143. doi: 10.1186/s12931-015-0303-6.
Nuttige links
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- GLITZ 001
- 00001949
Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .
Klinische onderzoeken op pioglitazone
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Dong-A ST Co., Ltd.VoltooidType 2 diabetesKorea, republiek van
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Emory UniversityVoltooidDiabetische ketoacidose | Ketose-gevoelige diabetes | Ernstige hyperglykemieVerenigde Staten
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National Cancer Institute (NCI)VoltooidPioglitazon Hydrochloride bij het voorkomen van hoofd-halskanker bij patiënten met orale leukoplakieHoofd-halskanker | Orale leukoplakieVerenigde Staten
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Assistance Publique - Hôpitaux de ParisMinistry of Health, FranceNog niet aan het wervenANCA-geassocieerde vasculitis | Snel voortschrijdende glomerulonefritis | Halve maan glomerulonefritis
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University at BuffaloTakeda Pharmaceuticals North America, Inc.Voltooid
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University of Campinas, BrazilWervingMyocardiale reperfusieschadeBrazilië
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University of Texas Southwestern Medical CenterWervingNefrolithiase, urinezuurVerenigde Staten
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West Virginia UniversityWervingBorstkanker | SpierpijnVerenigde Staten
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GlaxoSmithKlineVoltooidNiet-insulineafhankelijke diabetes mellitusVerenigde Staten
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Dokkyo Medical UniversityVoltooidHypertensie | Diabetische nefropathie | Type 2 diabetes | DyslipidemieJapan