Inhaled Apocynin Decreases Reactive Oxygen Species Concentrations in Exhaled Breath Condensate in Mild Asthmatics

Bronchial Asthma Clinical Trial

Official title:

Inhaled Apocynin Decreases Reactive Oxygen Species Concentrations in Exhaled Breath Condensate in Mild Asthmatics

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00992667
• Other study ID #: Nowak-01
• Status: Completed
• Phase: Phase 1
• First received: October 5, 2009
• Last updated: October 8, 2009
• Start date: June 2008
• Est. completion date: November 2008

Study information

• Verified date: October 2009
• Source: Medical Universtity of Lodz
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The aim of the study is to investigate the effect of inhaled apocynin on ROS (reactive oxygen species) and NOS (reactive nitrogen species) synthesis in 10 nonsmoking mild asthmatics. Effects of nebulized apocynin (0.5 mg/ml, 6 ml) are assessed in exhaled breath condensate (EBC) after 30, 60 and 120 minutes.

Description:

The study had a double-blind, placebo-controlled, cross-over design, consisted of 2 visits, separated 30 ± 10 days. If during the first visit the drug was used, in the second visit - placebo or vice versa. Before and after procedure, safety measures (arterial blood pressure, heart rate value, and cough scale) were performed. The effect of a possible inhibitor of ROS formation was performed using corticosteroid-naive asthmatic subjects, which are more prone to oxidative stress than healthy non-smoking subjects. The study protocol was approved by the Ethics Committee of Medical University of Lodz (no. RNN/12/08/KE) and written consent was obtained from every subject prior to the study.

EBC was collected using a modification of the method described previously by Doniec et al.2005. The subjects breathed spontaneously through a mouthpiece for 20 min. Each subject wore a nose clip during this procedure. Approximately 2 ml of condensate was collected and immediately stored at −80°C until the procedure of H2O2, NO2- and NO3- measurement.

6 ml of apocynin of total dose 3 mg (0.5 mg/ml) has been nebulized through the mouthpiece with using of a nose clip.

The H2O2 concentration in EBC was measured according to the method applied previously by Nowak et al.2001. Determination of NO2- and NO3- with Griess solution was performed by micromethod, carried out in 96-well plates, according to Griess' method, modified the method described by Dziedzic et al.2003.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10
• Est. completion date: November 2008
• Est. primary completion date: August 2008
• Accepts healthy volunteers: No
• Gender: All
• Age group: 22 Years to 56 Years

Eligibility

Inclusion Criteria:

• patients suffering from bronchial asthma (mild)

• patients free of any medication at least 7 days before research

• patients had not suffered from any infectious diseases including upper respiratory tract infections for at least 3 months prior to the study

Exclusion Criteria:

• patients suffering from moderate or severe asthma

• patients taking medication 7 or less days before the study

• infectious diseases that had occurred 3 months or less before the study

Related Conditions & MeSH terms

• Asthma
• Bronchial Asthma

Intervention

Drug:
• Apocynin nebulization
6 ml of apocynin of total dose 3 mg (0.5 mg/ml dissolved in sterile 0.9% NaCl as the study drug) has been nebulized for 15-20 min through the mouthpiece with using of a nose clip. A nebulizer Pulmo Aide AP-50 (DeVilbiss; Richmond, VA) was used (mass median aerosol diameter 3.1 mm, output 0.3 ml/min.)

Locations

Country	Name	City	State
Poland	Medical University of Lodz	Lodz	Lodzkie

Sponsors (2)

Lead Sponsor	Collaborator
Medical Universtity of Lodz	Ministry of Science and Higher Education, Poland

Country where clinical trial is conducted

Poland, 

References & Publications (5)

Bateman ED, Hurd SS, Barnes PJ, Bousquet J, Drazen JM, FitzGerald M, Gibson P, Ohta K, O'Byrne P, Pedersen SE, Pizzichini E, Sullivan SD, Wenzel SE, Zar HJ. Global strategy for asthma management and prevention: GINA executive summary. Eur Respir J. 2008 Jan;31(1):143-78. doi: 10.1183/09031936.00138707. — View Citation

Dziedzic B, Mazanowska-Gajdowicz J, Walczewska A, Sarniak A, Nowak D. Comparison of cadmium and enzyme-catalyzed nitrate reduction for determination of NO2-/NO3- in breath condensate. Clin Chim Acta. 2003 Sep;335(1-2):65-74. — View Citation

Horváth I, Hunt J, Barnes PJ, Alving K, Antczak A, Baraldi E, Becher G, van Beurden WJ, Corradi M, Dekhuijzen R, Dweik RA, Dwyer T, Effros R, Erzurum S, Gaston B, Gessner C, Greening A, Ho LP, Hohlfeld J, Jöbsis Q, Laskowski D, Loukides S, Marlin D, Montuschi P, Olin AC, Redington AE, Reinhold P, van Rensen EL, Rubinstein I, Silkoff P, Toren K, Vass G, Vogelberg C, Wirtz H; ATS/ERS Task Force on Exhaled Breath Condensate. Exhaled breath condensate: methodological recommendations and unresolved questions. Eur Respir J. 2005 Sep;26(3):523-48. — View Citation

Nowak D, Kalucka S, Bialasiewicz P, Król M. Exhalation of H2O2 and thiobarbituric acid reactive substances (TBARs) by healthy subjects. Free Radic Biol Med. 2001 Jan 15;30(2):178-86. — View Citation

Peters EA, Hiltermann JT, Stolk J. Effect of apocynin on ozone-induced airway hyperresponsiveness to methacholine in asthmatics. Free Radic Biol Med. 2001 Dec 1;31(11):1442-7. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	blood pressure, peripheral blood differential count, lung functional tests, single breath carbon monoxide diffusing capacity		6 months
Secondary	determination of H2O2, NO2- and NO3- concentrations in exhaled breath condensate, determination of NO2 concentration in serum, blood pressure, peripheral blood differential count, lung functional tests, single breath carbon monoxide diffusing capacity		6 months