- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00685711
Safety of Cat-PAD in Cat Allergic Subjects
August 5, 2008 updated by: Circassia Limited
An Escalating Single Intradermal or Subcutaneous Dose Study in Cat Allergic Subjects to Assess the Safety of Cat-PAD.
Cat allergy is an increasingly prevalent condition, affecting 10-15% of patients with allergic rhinoconjunctivitis and/or asthma.
Cat-PAD is a novel, synthetic, allergen-derived peptide desensitising vaccine, currently being developed for the treatment of cat allergy.
This study will investigate the safety of Cat-PAD administered as increasing single doses.
Study Overview
Detailed Description
This study is designed as a two centre, randomised, placebo-controlled, escalating single dose study in up to 88 cat allergic subjects.
Cohorts of 8 subjects will be enrolled.
Each cohort will undergo screening 14-28 days before treatment and a baseline challenge for EPSR and LPSR to cat allergen injected into the arm 7 days before treatment.
On the treatment day, subjects will be injected either intradermally (into the skin) or subcutaneously (under the skin) with a single dose of Cat-PAD or placebo and safety observations made for 8 h.
After 21 days, subjects will again have cat allergen injected into the arm and the EPSR and LPSR will be recorded.
The dose of Cat-PAD will be increased in successive cohorts, provided that the previous dose tested was well tolerated.
Study Type
Interventional
Enrollment (Actual)
88
Phase
- Phase 2
- Phase 1
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
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Berlin, Germany, D-10117
- Allergy-Centre-Charité
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-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 65 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- A reliable history of rhinoconjunctivitis (sneezing, rhinorrhoea, nasal blockage, itchy/red/sore/watering eyes) or controlled asthma (GINA (2006) classification 1) on exposure to cats for at least 1 year.
- Late-Phase Allergic Skin Reaction (LPSR) to 0.010 HEP units Leti cat allergen eight hours after intradermal injection of greater than 25mm diameter response on single arm.
Exclusion Criteria:
- Subjects with asthma falling under GINA(2006) classification 2 (partly controlled) and 3 (uncontrolled).
- A history of anaphylaxis to cat allergen.
- Subjects with a cat specific IgE >100 kU/L.
- Subjects with an FEV1 <80% of normal.
- Subjects with an acute phase skin response to cat allergen with a weal diameter > 30mm.
- Subjects who suffer from hay fever, and cannot complete the clinical study outside the pollen season.
- Allergen immunotherapy during the last 5 years or Cat Dander immunotherapy ever.
- Use of the following therapies for the periods specified prior to the screening visit will make the subject ineligible for the study: corticosteroids: (depot: 90 days; systemic: 30 days; dermatological, intranasal, inhalational: 15 days); cromones (14 days); antihistamines other than loratadine (nasal and long-acting oral: 10 days; short-acting oral, ocular: 7 days); leukotriene inhibitors (10 days); anticholinergics (7 days); alpha-adrenergic agonists (7 days); tricyclic antidepressants (14 days). If it becomes a medical necessity for a subject to use one of these contraindicated medications during the study this will become an individual stopping criteria.
- Subjects for whom administration of adrenaline is contra-indicated (e.g. subjects with acute or chronic symptomatic coronary heart disease or severe hypertension).
- Subjects being treated with beta-blockers
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: 1
Placebo intradermal n = 2 with each dose level of Cat-PAD.
|
single, escalating dose intradermal and subcutaneous injections of Cat-PAD
|
Experimental: 2
Intradermal injection of increasing single doses of Cat-PAD (0.03, 0.3, 3, 12 nmol) n = 6 per dose level.
Based on review of blinded LPSR, an additional dose of Cat-PAD between 0.03 and 12 nmol may be administered to an additional cohort of 6 subjects.
|
single, escalating dose intradermal and subcutaneous injections of Cat-PAD
|
Placebo Comparator: 3
Placebo subcutaneous n = 2 with each dose level of Cat-PAD.
|
single, escalating dose intradermal and subcutaneous injections of Cat-PAD
|
Experimental: 4
Subcutaneous injection of increasing single doses of Cat-PAD (0.03, 0.3, 3, 12, 20 nmol) n = 6 per dose level.
Based on review of blinded LPSR, an additional dose of Cat-PAD between 0.03 and 20 nmol may be administered to an additional cohort of 6 subjects.
|
single, escalating dose intradermal and subcutaneous injections of Cat-PAD
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Safety and tolerability of Cat-PAD
Time Frame: 0, 7, 21 days
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0, 7, 21 days
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Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Late-Phase Skin Reaction (LPSR) 8 hours after intradermal challenge with whole cat allergen.
Time Frame: Day 21
|
Day 21
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Margitta Worm, MD Professor, Allergy-Centre-Charité
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
January 1, 2008
Primary Completion (Actual)
July 1, 2008
Study Completion (Actual)
July 1, 2008
Study Registration Dates
First Submitted
May 20, 2008
First Submitted That Met QC Criteria
May 23, 2008
First Posted (Estimate)
May 28, 2008
Study Record Updates
Last Update Posted (Estimate)
August 6, 2008
Last Update Submitted That Met QC Criteria
August 5, 2008
Last Verified
August 1, 2008
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- CP001
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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