Measurement of Smoking−Induced Neutrophil Activation

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. Identifier: NCT00159354
Recruitment Status : Completed
First Posted : September 12, 2005
Last Update Posted : May 29, 2015
Information provided by:
Imperial College London

Brief Summary:
Neutrophil involvement in the development of COPD by smokers is well recognised. However not all smokers develop overt lung disease. We have previously shown that uptake of FDG is related to neutrophil activity and can be measured by PET and that uptake is greater in COPD patients than normal subjects. We have also shown that FDG−PET shows inflammatory changes in asymptomatic smokers after cigarette smoking. We plan to investigate the attenuation of this inflammation by steroid tablets and whether FDG PET can demonstrate this. We also wish to establish if similar changes are demonstrated after smoking by COPD patients.

Condition or disease Intervention/treatment Phase
COPD Drug: predisolone Not Applicable

Detailed Description:

Asymptomatic smokers will be recruited by advertisement in newspapers and from posters displayed in the local community.Patients will be recruited from Hammersmith Hospital NHS Trust and local GP surgeries, where we shall display posters. We shall also directly ask patients whom we think may be suitable. This could be at a respiratory clinic, after they attend the lung function department for routine tests, and at GP and practice nurse appointments. After discussing the research outline with the subjects, either in person or by phone, we shall give them the information sheet and ask them to attend for a screening visit. This will be a chance for them to ask more questions, and for us to obtain informed consent. We will then carry out a brief medical examination and routine lung function tests. Providing they fulfil the inclusion criteria we shall then organise the subsequent visits, for 2 scans if they are patients with COPD or 3 if they are asymptomatic smokers. All participants will undergo chest X−ray to exclude other lung disease, unless they have had one in the past year. They must abstain for smoking for at least 12 hours prior to visit, and fast for 4 hours prior to scan. On the first day of attendance they will have a brief medical to assess whether they are clinically stable, and have spirometry and CO monitored, to confirm abstinence. For the scan visits the asymptomatic smokers will take the placebo or prednisolone the previous evening at 10pm and again the next morning with a light breakfast by 7:30am. On 2 scan days they will smoke 2 cigarettes 4h later, 60 minutes prior to scan. The PET scan takes about 90 minutes, and includes blood sampling throughout. They must be able to lie still in the scanner. We will aim to complete the scans at 1−2 week intervals, whilst clinically stable.

The COPD patients will not take prednisolone/placebo, but will either smoke 2 real or dummy cigarettes prior to scan. This protocol is similar to others used previously, which have proved acceptable to COPD patients and healthy smokers.

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 16 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Evaluation of Smoking−Induced Neutrophil Activation as a Potential Biomarker of Response to Therapeutic Interventions in COPD: Proof of Concept Study
Study Start Date : June 2005
Actual Study Completion Date : December 2006

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Smoking

Primary Outcome Measures :
  1. Modification of neutrophil activation

Information from the National Library of Medicine

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:   50 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male smokers >10 pack.year history,
  • FEV1>80% predicted,
  • no relevant medical or mental disorder, able to give informed consent and
  • Patients with COPD,
  • >20 pack.year history,
  • no other active lung disease,
  • FEV1<70%
  • FEV1/VC<70%,
  • no other relevant medical or mental disorder, able to give informed consent

Exclusion Criteria:

  • Female asymptomatic smokers
  • ex−smokers
  • other lung disorder
  • relevant medical or mental illness
  • recent (within 1 month) chest infection
  • diabetes

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00159354

United Kingdom
Hammersmith Campus
London, United Kingdom, W12 0NN
Sponsors and Collaborators
Imperial College London
Principal Investigator: Hazel A Jones, PhD Imperial College London Identifier: NCT00159354     History of Changes
Other Study ID Numbers: FDG-PETsmoking
First Posted: September 12, 2005    Key Record Dates
Last Update Posted: May 29, 2015
Last Verified: November 2007

Keywords provided by Imperial College London:
pulmonary inflammation,
steroid intervention