Working... Menu

Suitability of a Low Dose Lipopolysaccharide (LPS) Inhalation as a Challenge Model

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: NCT01400568
Recruitment Status : Completed
First Posted : July 22, 2011
Last Update Posted : March 12, 2012
Information provided by:
Fraunhofer-Institute of Toxicology and Experimental Medicine

Brief Summary:
This pilot study is planned to assess the suitability of a low dose Lipopolysaccharide (LPS) inhalation as a challenge model. As LPS effects are based on a different mode of action, this challenge model will provide the possibility to test a wider spectrum of potential drugs in the future. Provided that the LPS response is reproducible, it is planned to test whether a single high dose of inhaled steroid can serve as a positive control in the LPS model. Another major aim of the study is to test a variety of novel tools for the non-invasive assessment of airway inflammation induced by LPS challenge.

Condition or disease Intervention/treatment Phase
Healthy Drug: LPS challenge with nebulized LPS Drug: fluticasone propionate (FP) Not Applicable

Detailed Description:

In this study, airway inflammation will be induced by LPS inhalation. In case a neutrophilic airway inflammation can be safely induced by inhaled LPS, the LPS challenge will be repeated. If neutrophil airway inflammation after LPS challenge is reproducible LPS challenge will be repeated after pre-treatment with a single high dose of inhaled fluticasone propionate.

To determine airway inflammation, the subjects' exhaled breath will be analyzed by different techniques, and blood samples as well as induced sputum will be collected.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 12 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: A Methodological Pilot Study to Assess the Suitability of a Low Dose LPS Inhalation as a Challenge Model in Early Translational Drug Development
Study Start Date : August 2011
Actual Primary Completion Date : January 2012
Actual Study Completion Date : January 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: LPS challenge and fluticasone propionate
In case LPS induced airway inflammation is reproducible, the effect of a single high dose of inhaled fluticasone propionate will be assessed after a 4-week wash-out period.
Drug: LPS challenge with nebulized LPS
20,000 EU of Clinical Center Reference Endotoxine (CCRE) will be applied by an AKITA® Jet Nebulizer under the constant supervision of the site staff.

Drug: fluticasone propionate (FP)
The dosage of FP will be 2 mg. This dosage will be inhaled by 4 puffs of Flutide® forte 500 Diskus® 500 µg / dose according to the package insert.

Primary Outcome Measures :
  1. Induced sputum [ Time Frame: 6 h after the start of LPS challenge ]
    • neutrophil cell count

Secondary Outcome Measures :
  1. lung function [ Time Frame: at the end of each LPS challenge and up to 24 hours ]
    Change of lung function directly at the end of each challenge as well as up to 24 h after the end of exposure compared with baseline

  2. Blood samples [ Time Frame: before and 6 h after the start of LPS challenge ]
    Differential cell count

  3. Exhaled breath [ Time Frame: 3 hours after the start of LPS challenge ]
    Pre-concentrated samples (30 L, 10-15 exhalations) on a specific substrate for later analysis by Gas Chromatorgraphy - Mass Spectrometry (GC-MS) or Smart-Nose and exhaled breath temperature

  4. Induced sputum [ Time Frame: 6 h after the start of LPS challenge ]
    soluble biomarkers such as but not limited to Myeloperioxidase (MPO), Surfactant Protein D (SP-D), Interleukin (IL-8)

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.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Able and willing to give written informed consent
  • Healthy male and female nonsmokers, aged 18 to 55 years, with a history of less than 1 pack year having been nonsmokers for at least the last five years
  • FEV1 ≥ 80 % of predicted, FEV1/FVC ≥ 70 %.
  • Available to complete all study measurements
  • Subjects must be able to produce adequate sputum (≥ 1× 106 total cells, ≥ 50 % cell viability, ≤ 20 % squamous epithelial cells)
  • Negative methacholine challenge (> 8 mg/mL)
  • Women will be considered for inclusion if they are:

Not pregnant, as confirmed by pregnancy test (see flow chart), and not nursing. Of non-child bearing potential (i.e. physiologically incapable of becoming pregnant, including any female who is pre-menarchial or post-menopausal, with documented proof of hysterectomy or tubal ligation, or meets clinical criteria for menopause and has been amenorrhoeic for more than 1 year prior to the screening visit).

Of childbearing potential and using a highly effective method of contraception during the entire study (vasectomised partner, sexual abstinence - the lifestyle of the female should be such that there is complete abstinence from intercourse from two weeks prior to the first dose of study medication until at least 72 hours after treatment -, implants, injectables, combined oral contraceptives, hormonal IUDs or double-barrier methods, i.e. any double combination of IUD, condom with spermicidal gel, diaphragm, sponge, and cervical cap).

Exclusion Criteria:

  • Upper or lower respiratory tract infection in the last four weeks prior to screening
  • Past or present disease, which as judged by the investigator, may affect the outcome of the study. These diseases include, but are not limited to, cardiovascular disease, malignancy, hepatic disease, renal disease, hematological disease, neurological disease, psychiatric disease, endocrine disease, infectious disease, inflammatory disease or pulmonary disease (including but not confined to asthma, tuberculosis, bronchiectasis or cystic fibrosis)
  • Regular intake of any prescribed or over the counter medication. Exceptions include paracetamol for pain relief, oral contraceptive medication, hormonal replacement therapy, dietary and vitamin supplements
  • Any clinically relevant abnormal findings in physical examination, clinical chemistry, hematology, urinalysis, vital signs or ECG at Visit 1, which, in the opinion of the investigator, may either put the subject at risk because of participation in the study, or may influence the results of the study, or the subject's ability to participate in the study.
  • Administration of corticosteroids within the last 2 weeks prior to screening. Administration of topical corticosteroids within the last 2 weeks prior to screening is permitted at the discretion of the investigator.
  • History of drug or alcohol abuse
  • Risk of non-compliance with study procedures
  • Suspected inability to understand the protocol requirements, instructions and study-related restrictions, the nature, scope, and possible consequences of the study.

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): NCT01400568

Layout table for location information
Fraunhofer ITEM
Hannover, Niedersachsen, Germany, 30625
Sponsors and Collaborators
Fraunhofer-Institute of Toxicology and Experimental Medicine
Layout table for investigator information
Principal Investigator: Jens Hohlfeld, MD, Professor Fraunhofer ITEM

Publications automatically indexed to this study by Identifier (NCT Number):
Layout table for additonal information
Responsible Party: Prof. Dr. Jens Hohlfeld, Fraunhofer ITEM Identifier: NCT01400568     History of Changes
Other Study ID Numbers: 11-06 LOPS
First Posted: July 22, 2011    Key Record Dates
Last Update Posted: March 12, 2012
Last Verified: March 2012

Additional relevant MeSH terms:
Layout table for MeSH terms
Anti-Inflammatory Agents
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Asthmatic Agents
Respiratory System Agents
Dermatologic Agents
Anti-Allergic Agents