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Dog Hair Extract Study

This study is ongoing, but not recruiting participants.
Sponsor:
Collaborator:
ALK-Abelló A/S
Information provided by:
National Jewish Health
ClinicalTrials.gov Identifier:
NCT01343420
First received: April 26, 2011
Last updated: July 19, 2011
Last verified: July 2011
History of Changes
  Purpose

Liquid allergen extracts contain proteins, such as (but not limited to) tree, weed, cat, cockroach, and nuts, and are used to identify allergies by observing the body's reaction to the introduction of extract underneath the skin. There are a few dog allergen extracts commercially available in the US for allergy testing; however, none of these products are standardized, meaning they are not required to be the same strength. Because some extracts are not as potent (strong) as others, it's possible that some patients' allergies are misdiagnosed. Typically, the most potent (strong), but safe extract should be used so that allergic patients are correctly diagnosed.

The purpose of this study is to compare the safety and potency of an investigational (not approved for use by the United States Food and Drug Administration [FDA]) dog allergen extract with two commercially available dog extracts, which are of differing potencies.


Condition Intervention
Potency of Dog Hair Extract
 Biological: Dog Hair Extract, ALK-Abelló, Inc.

Study Type: Interventional
Study Design: Intervention Model: Factorial Assignment
Masking: Single Blind (Subject)
Official Title: Dog Hair Evaluation Potency by Prick Skin Testing

Resource links provided by NLM:

MedlinePlus related topics: Allergy
U.S. FDA Resources

Further study details as provided by National Jewish Health:

Primary Outcome Measures:
  • End-point dilution giving a positive prick skin test in dog allergic subjects. [ Time Frame: Study Completion ] [ Designated as safety issue: No ]
    The concentration of each allergen extract which produced a 5 mm wheal for each subject will be calculated. From this, the relative potency of each extract will be calculated.


Enrollment: 15
Study Start Date: November 2010
Estimated Study Completion Date: January 2012
Primary Completion Date: April 2011 (Final data collection date for primary outcome measure)
Intervention Details:
    Biological: Dog Hair Extract, ALK-Abelló, Inc.
    ALK-Abelló dog epithelial 1:10w/v glycerin
Detailed Description:

This study is designed to assess the potency of a modified dog hair and dander extract in comparison with the two commercially available dog hair and dander extracts. This is a pilot study to estimate a target strength of dog extract in order to proceed to further studies.

  Eligibility

Ages Eligible for Study:   18 Years to 60 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patients must sign informed consent before completing any study procedure.
  • Age 18 years and ≤60 years.
  • Dog-sensitized patients as indicated by a mean wheal > 5 mm with the AP dog extract.
  • Females of child-bearing potential must have a negative pregnancy test the day of skin testing.
  • Patients who are able to understand the information given and be compliant with the protocol.

Exclusion Criteria:

  • Asthma requiring treatment with medications other than beta-2 inhaled agonists and montelukast inhibitors.
  • Patients with a history of asthma or wheezing with an FEV1 <80%.
  • Subjects who have taken an ocular or nasal antihistamine within 5 days prior to the procedures.
  • Patients who have received any desensitization for dog allergen in the past 5 years.
  • Patients with any past or current clinically significant condition that may affect the patient's participation or the outcome of the study to the discretion of the investigator. These include, but are not limited to, anaphylaxis with cardio-respiratory symptoms, chronic urticaria and angioedema unless related to dog exposure, severe atopic dermatitis, malignancy, cardiovascular, hepatic, renal, hematological, neurological, immunological, and endocrine disease.
  • Subjects taking beta blockers, ace inhibitors, continuous systemic corticotherapy, immunosuppressive drugs or monoamine oxidase inhibitors.
  • Use of H1 antagonists, tricyclic antidepressants and phenothiazines within 5 days prior to the testing.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01343420

Locations
United States, Colorado
National Jewish Health
Denver, Colorado, United States, 80206
Sponsors and Collaborators
National Jewish Health
ALK-Abelló A/S
Investigators
Principal Investigator: Harold Nelson, M.D. National Jewish Health
  More Information

No publications provided

Responsible Party: Harold Nelson, M.D., National Jewish Health
ClinicalTrials.gov Identifier: NCT01343420     History of Changes
Other Study ID Numbers: ALK-Abelló Dog Allergen
Study First Received: April 26, 2011
Last Updated: July 19, 2011
Health Authority: United States: Food and Drug Administration

Keywords provided by National Jewish Health:
Skin tests
Dog Hair
Allergy Extract

ClinicalTrials.gov processed this record on May 22, 2013