Assessment of Residual Allergenicity of Grass/Rye Pollen Allergoid Using Skin Prick Testing - Full Text View

Sponsor:	Allergy Therapeutics
Information provided by:	Allergy Therapeutics
ClinicalTrials.gov Identifier:	NCT00104390

Purpose

The purpose of this study is to evaluate the residual allergenicity of Grass MATA (modified pollen allergen tyrosine adsorbate) by skin prick testing. This is done by a comparison of the wheal response after skin prick testing with aqueous native and modified allergen, modified tyrosine adsorbed allergen and Grass MATA MPL (modified tyrosine adsorbed + MPL).

Condition	Intervention	Phase
Type I Hypersensitivity	Biological: Grass MATA MPL	Phase I

Study Type:	Interventional
Study Design:	Allocation: Non-Randomized Endpoint Classification: Pharmacodynamics Study Intervention Model: Single Group Assignment Masking: Single Blind Primary Purpose: Treatment
Official Title:	A Single-blind Phase 1 Study to Assess the Residual Allergenicity of Grass/Rye Pollen Allergoid Using Skin Prick Testing

Resource links provided by NLM:

MedlinePlus related topics: Allergy

U.S. FDA Resources

Further study details as provided by Allergy Therapeutics:

Primary Outcome Measures:

to assess the allergenicity of the modified grass/rye pollen allergoid using skin prick testing

Secondary Outcome Measures:

evaluation for potential late phase reactions
adverse events
clinical labs
vital signs

Estimated Enrollment:	14
Study Start Date:	March 2005
Estimated Study Completion Date:	April 2005

Detailed Description:

Grass MATA MPL has been developed to provide pre-seasonal specific immunotherapy for patients with proven type I hypersensitivity to cross reacting grass pollens.

MPL (Monophosphoryl Lipid A), a purified, detoxified glycolipid derived from the cell wall of Salmonella minnesota, is included in the product formulation as an adjuvant to increase the immunogenic effect of the product and to enhance the switch from an allergen-specific TH2 to a TH1-like T cell profile.

The grass pollen extract is modified with glutaraldehyde to produce the active ingredient, an allergoid. This modification reduces the reactivity of the extract with IgE antibody, thus reducing the risk of side effects. However, a simultaneous reduction in other important immunological properties, such as IgG and T cell reactivities, is not seen.

The modification is greater than 75 %, so that only a small amount of unmodified allergen is remaining in the product. The purpose of this study is to assess residual allergenicity of the modified grass/rye pollen in Grass MATA MPL using skin prick testing.

In this skin prick test, the following test products will be compared:

7 concentrations of aqueous native allergen
aqueous modified allergen
modified tyrosine adsorbed allergen
Grass MATA MPL (modified tyrosine adsorbed + MPL)

Eligibility

Ages Eligible for Study:	18 Years to 50 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

Positive skin prick test to grass and rye pollen allergen extract
Positive skin prick test to positive histamine control
Negative skin prick test to negative control
Specific IgE for grass and rye as documented by a RAST or equivalent test
Females of childbearing potential may enter the study if they have a negative urine pregnancy test and they have been practicing adequate contraception for 3 months prior to the study and continue to do so during the study.

Exclusion Criteria:

History or presence of acute or subacute atopic dermatitis, chronic dermatitis, urticaria factitia, or urticaria due to physical/chemical influence or any other skin conditions which might interfere with the interpretation of skin prick test results
Visual inspection of the forearms indicates potential problems with the conduct or interpretation of the skin prick tests; both forearms must be available for testing
Subject has bronchial asthma or other lower respiratory tract condition (i.e., emphysema, bronchiectasis)
History or presence of diabetes, cancer or any clinically significant cardiac, metabolic, renal, hepatic, gastrointestinal, dermatologic, venereal, hematologic, neurologic or psychiatric diseases or disorders
Any clinically significant abnormal laboratory value at Visit 1
Clinically relevant sensitivity to any common perennial allergen: house dust mites, molds, or epithelia (cat, dog, and horse). Sensitivity will be determined by a skin prick test at Visit 1, a RAST (or equivalent method) at Visit 1, or a documented history of symptoms to perennial allergens. Subjects may be enrolled in the study if they test positive, but have no current or historical symptoms to perennial allergens.
Clinically relevant sensitivity to any common springtime flowering plant: Birch, Oak, Sycamore, Beech, Ash, and Poplar.

Sensitivity will be determined by a skin prick test at Visit 1, a RAST (or equivalent method) at Visit 1, or a documented history of symptoms to springtime (non-grass/rye) allergens. Subjects may be enrolled in the study if they test positive, but have no current or historical symptoms to these springtime allergens.

History of auto-immune diseases or rheumatoid diseases
Subject not allowed to receive adrenalin
Subject has disorder of tyrosine metabolism (i.e., alcaptonuria, tyrosinemia)
Subject with diseases interfering with the immune response and have received medication, which could influence the results of this study
Subject has acute or chronic infection
History of anaphylaxis, including anaphylactic food allergy, insect venom anaphylaxis, exercise or drug induced anaphylaxis
History of angioedema
History of hypersensitivity to the excipients of the study medication
History of immunotherapy with grass allergen extracts
Current therapy with ß-blockers
Currently receiving anti-allergy medication or other drugs with an antihistaminic activity
Subject has a positive drugs of abuse screen at Visit 1
Subject participated in a clinical trial with an investigational drug within the last 3 months
Subject cannot communicate reliably with the Investigator or is not likely to cooperate with the requirements of the study
Subject is pregnant or lactating
Subject received treatment with a preparation containing MPL during the past 12 months
Use of prohibited medications or inadequate washout periods prior to screening

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00104390

Locations

United States, Oregon
Allergy Associates Research Center
Portland, Oregon, United States, 97213

Sponsors and Collaborators

Allergy Therapeutics

Investigators

Principal Investigator:

Michael J. Noonan, MD

Allergy Associates Research Center

More Information

No publications provided

ClinicalTrials.gov Identifier:	NCT00104390 History of Changes
Other Study ID Numbers:	GrassMATAMPL101
Study First Received:	February 28, 2005
Last Updated:	June 9, 2010
Health Authority:	United States: Food and Drug Administration

Keywords provided by Allergy Therapeutics:

allergy
skin prick test
allergoid
allergenicity
specific immunotherapy

Additional relevant MeSH terms:

Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases

ClinicalTrials.gov processed this record on February 12, 2012