Clinical trial NCT00848406: A Study to Obtain Normal Values of Inflammatory Variables From Healthy Subjects
Official title: An Observational Study to Obtain Normal Values of Inflammatory Variables in Induced Sputum, Exhaled Breath, and Bronchial Biopsies From Healthy Smoking and Non-smoking Individuals
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Asthma
Copd
Keywords: bronchial
COPD
Asthma
sputum
biopsies
Lead sponsor: University Medical Center Groningen
Sponsor class: OTHER
First posted: 2009-02-20
Enrollment: 120
Sex: ALL
Minimum age (years): 18
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: Healthy individuals

Brief summary: Smoking induces an inflammatory reaction in the airways which can ultimately result in persistent damage and the development of a Chronic Obstructive Pulmonary Disease (COPD). However, not all subjects who smoke end up with COPD. After long-term smoking, approximately 20% of subjects develop COPD. At this time, it is unclear why some subjects develop COPD, whereas others maintain a normal lung function.

In addition, smoking has important consequences in asthma. Patients with asthma who smoke have a more severe asthma and more often experience an asthma exacerbation. In addition, it has been shown that inhaled corticosteroids are less effective in smoking asthmatics.

With this research project, the researchers will investigate the effects of smoking on the airways. To this end, the researchers will compare markers of airway inflammation, lung function and symptoms between healthy smokers and non-smokers of varying age. In addition, the researchers will compare those healthy subjects with patients with asthma and COPD which are characterized in earlier studies.


Eligibility criteria: Inclusion Criteria:

* Have not smoked during the last year.
* Have never smoked for as long as a year.
* Have \< 0.5 packyear.

Exclusion Criteria:

* Persons who used inhaled or oral corticosteroids during \>5 years, or within the last 5 years.
* FEV1 \<1.2 L
* A subject is not eligible to enter and participate if he does not agree that we inform his general practicioner about participation in the study and also about any unexpected finding during the study.
* Upper respiratory tract infection (e.g. colds), within 2 months.
* Pregnancy, or the possibility of being pregnant (i.e. women who do not use adequate anticonception as judged by the investigator).
* Malignancy within the past 5 years (except for squamous or basal cell carcinoma of the skin that has been treated with no evidence of recurrence).
* Signs or symptoms of any other concomitant disease that, in the eyes of the investigator, can interfere with the study results.
* Known recent substance abuse (drug or alcohol).
* Claustrophobia.

Primary outcomes:
measure: parameters for inflammation and remodelling in airway tissue
timeFrame: The duration of the study is estimated on 2 year
Secondary outcomes:
measure: Induced sputum, PC20 AMP, spirometrie, questionnaires, CT scan.
timeFrame: 2 year
Other outcomes:
Locations:
city: Groningen
country: Netherlands
facility: University Medical Centre Groningen
Study officials:
affiliation: University Medical C enter Groningen
name: Maarten van den Berge, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Nair GB, Galban CJ, Al-Katib S, Podolsky R, van den Berge M, Stevens C, Castillo E. An assessment of the correlation between robust CT-derived ventilation and pulmonary function test in a cohort with no respiratory symptoms. Br J Radiol. 2021 Feb 1;94(1118):20201218. doi: 10.1259/bjr.20201218. Epub 2020 Dec 15.
citation: Faiz A, Imkamp K, van der Wiel E, Boudewijn IM, Koppelman GH, Brandsma CA, Kerstjens HAM, Timens W, Vroegop S, Pasma HR, Boersma WG, Wielders P, van den Elshout F, Mansour K, Steiling K, Spira A, Lenburg ME, Heijink IH, Postma DS, van den Berge M. Identifying a nasal gene expression signature associated with hyperinflation and treatment response in severe COPD. Sci Rep. 2020 Oct 15;10(1):17415. doi: 10.1038/s41598-020-72551-0.
citation: Boudewijn IM, Faiz A, Steiling K, van der Wiel E, Telenga ED, Hoonhorst SJM, Ten Hacken NHT, Brandsma CA, Kerstjens HAM, Timens W, Heijink IH, Jonker MR, de Bruin HG, Sebastiaan Vroegop J, Pasma HR, Boersma WG, Wielders P, van den Elshout F, Mansour K, Spira A, Lenburg ME, Guryev V, Postma DS, van den Berge M. Nasal gene expression differentiates COPD from controls and overlaps bronchial gene expression. Respir Res. 2017 Dec 21;18(1):213. doi: 10.1186/s12931-017-0696-5.
citation: Telenga ED, Oudkerk M, van Ooijen PM, Vliegenthart R, Ten Hacken NH, Postma DS, van den Berge M. Airway wall thickness on HRCT scans decreases with age and increases with smoking. BMC Pulm Med. 2017 Feb 1;17(1):27. doi: 10.1186/s12890-017-0363-0.
citation: Hoonhorst SJ, Lo Tam Loi AT, Pouwels SD, Faiz A, Telenga ED, van den Berge M, Koenderman L, Lammers JW, Boezen HM, van Oosterhout AJ, Lodewijk ME, Timens W, Postma DS, Ten Hacken NH. Advanced glycation endproducts and their receptor in different body compartments in COPD. Respir Res. 2016 Apr 26;17:46. doi: 10.1186/s12931-016-0363-2.
citation: Hoonhorst SJ, Lo Tam Loi AT, Hartman JE, Telenga ED, van den Berge M, Koenderman L, Lammers JW, Boezen HM, Postma DS, Ten Hacken NH. Advanced glycation end products in the skin are enhanced in COPD. Metabolism. 2014 Sep;63(9):1149-56. doi: 10.1016/j.metabol.2014.06.006. Epub 2014 Jun 13.
citation: Hoonhorst SJ, ten Hacken NH, Lo Tam Loi AT, Koenderman L, Lammers JW, Telenga ED, Boezen HM, van den Berge M, Postma DS. Lower corticosteroid skin blanching response is associated with severe COPD. PLoS One. 2014 Mar 12;9(3):e91788. doi: 10.1371/journal.pone.0091788. eCollection 2014.