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The Role of Pollen Starch Granules in Pollen Challenge Studies in the Fraunhofer Environmental Exposure Unit

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: NCT00209365
Recruitment Status : Completed
First Posted : September 21, 2005
Last Update Posted : February 15, 2017
Information provided by:
Fraunhofer-Institute of Toxicology and Experimental Medicine

Brief Summary:
The aim of the study is to explore the contribution of pollen starch granules to the induced symptoms and airway inflammation in patients with allergic rhinitis and mild asthma in a controlled pollen exposure(pollen challenge room at the Fraunhofer ITEM). Starch granules are released from the pollen grains and are considered to be the allergen carriers of the pollen. The hypothesis is proposed that pollen starch granules are important in the induction of airway inflammation and airway hyperresponsiveness.

Condition or disease Intervention/treatment Phase
Asthma Seasonal Allergic Rhinitis Procedure: exposure to grass pollen/starch granules Not Applicable

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Study Type : Interventional  (Clinical Trial)
Enrollment : 24 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double
Primary Purpose: Diagnostic
Study Start Date : September 2005
Actual Study Completion Date : December 2005

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. AMP hyperrespnsiveness

Secondary Outcome Measures :
  1. exhaled NO
  2. FEV1
  3. Rhinomanometry

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • • Male and female subjects, aged 18-55 years. Women will be considered for inclusion if they are:

    • Not pregnant or 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 meet clinical criteria for menopause and have been amenorrhoeic for more than 1 year prior to the screening visit).
    • Of childbearing potential and using an appropriate method of contraception (Oral contraceptive pill or double barrier).
    • Documented history of bronchial asthma first diagnosed at least 6 months prior to the screening visit and currently being treated only with intermittent short-acting beta2-agonist therapy by inhalation. Patients on low dose steroids will be washed out for 4 weeks.
    • FEV1 > 80% of predicted at screening.
    • They have history of allergic rhinitis to grass pollen and a positive skin prick test for Dactylus glomerata pollen at or within 12 months prior to the screening visit.
    • Documented sensitivity to AMP with a provocative concentration of AMP resulting in a 20% fall in FEV1 (PC20 AMP) of <80mg/ml at the screening visit.
    • Non smoker or smokers with a history of less than 10 pack years.
    • Able and willing to give written informed consent to take part in the study.
    • Available to complete all study measurements.

Exclusion Criteria:

  • • History of a respiratory tract infection and/or exacerbation of asthma within 4 weeks before the informed consent and during the study.

    • Any history of life-threatening asthma, defined as an asthma episode that required intubation and/or was associated with hypercapnoea, respiratory arrest or hypoxic seizures.
    • Administration of oral, injectable or dermal corticosteroids within 8 weeks or intranasal and/or inhaled corticosteroids within 4 weeks of the screening visit.
    • Administration of xanthines (including theophylline, but not including caffeine), anticholinergics, cromoglycates and/or long acting beta-agonists within 1 week of the screening visit.
    • Unable to abstain from other medications including non-steroidal anti-inflammatory drugs (NSAIDS), anti-depressant drugs, anti-histamines and anti-asthma, anti-rhinitis or hay fever medication (other than short acting inhaled beta-agonists) and paracetamol (up to 1g paracetamol per day is permitted for the treatment of minor ailments e.g. headache) for 1 week prior to screening and throughout the course of the study.
    • Past or present disease, which as judged by the investigator, may affect the outcome of this study. These diseases include, but are not limited to, cardiovascular disease, malignancy, hepatic disease, renal disease, haematological disease, neurological disease, endocrine disease or pulmonary disease (including but not confined to chronic bronchitis, emphysema, tuberculosis, bronchiectasis or cystic fibrosis). History of MI or CVA are specific contra-indications to AHR testing
    • Known or suspected hypersensitivity or adverse reaction to AMP
    • Subject is undergoing allergen desensitisation therapy
    • There is a risk of non-compliance with study procedures
    • Neurological or psychiatric disease or history of drug or alcohol abuse which would interfere with the subject's proper completion of the protocol assignment

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): NCT00209365

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Fraunhofer ITEM
Hannover, Germany, 30625
Sponsors and Collaborators
Fraunhofer-Institute of Toxicology and Experimental Medicine
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Principal Investigator: Norbert Krug, MD Fraunhofer ITEM

Layout table for additonal information Identifier: NCT00209365    
Other Study ID Numbers: 04/07 Starch granules ITEM
First Posted: September 21, 2005    Key Record Dates
Last Update Posted: February 15, 2017
Last Verified: February 2017
Additional relevant MeSH terms:
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Rhinitis, Allergic
Rhinitis, Allergic, Seasonal
Nose Diseases
Respiratory Tract Diseases
Respiratory Tract Infections
Otorhinolaryngologic Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases