Sublingual Cockroach Safety in Adults With Cockroach Allergy & Perennial Allergic Rhinitis With or Without Asthma

Phase 1

Completed

Conditions: Allergy
Asthma

Interventions: Drug: Glycerinated German cockroach allergenic extract
Drug: Placebo

Registration Number: NCT00434421

Lead Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

Brief Summary: Immunotherapy may help reduce symptoms of allergy and asthma. Problems concerning compliance and adverse events with subcutaneous allergen immunotherapy have generated interest in delivering immunotherapy sublingually (under the tongue). The purpose of this study is to evaluate the safety of a cockroach extract given sublingually to people with perennial (year-round) allergic rhinitis, with or without asthma.

Detailed Description: The prevalence of asthma has dramatically increased in many parts of the world. Currently, there is no effective way to prevent development of allergic rhinitis and asthma and no cure. Sublingual immunotherapy (SLIT), a type of therapy in which allergens are placed under the tongue, may be a way to control and possibly prevent allergic rhinitis and asthma. However, detailed research of this approach is limited.

The purpose of this study is to evaluate the safety and tolerability of a sublingual cockroach extract given to people with perennial allergic rhinitis. Participants in this study will include people both with and without asthma.

Participation in this study will last a little more than 2 weeks. Participants will be stratified by age (oldest to youngest age group) and degree of cockroach sensitivity. Each age group will be enrolled after the previous group's safety data have been reviewed. At study entry (Day 0), participants will receive a dose of placebo and then up to seven incremental doses of cockroach extract at 15-minute intervals while observed by the clinic nurse. Doses will continue to be given until a sign or symptom occurs that indicates the participant is having difficulty tolerating the drug, or until the maximum study dose is reached.

At the Principal Investigator's discretion, participants who were able to achieve the maximum study dose will be invited to continue onto the 2-week treatment course of the study. These participants will return on Days 1 and 2 to the clinic to self-administer the maximum study dose of cockroach extract. After self-administering the maximum study dose, participants will be observed by the clinic nurse for 30 minutes. On Days 3 through 14, participants will take the maximum study dose of cockroach extract daily at home. Participants will be asked to keep a diary and record signs or symptoms experienced after taking each dose.

Skin tests, breathing tests, and blood collection will occur at study screening. At study entry, participants will be taught to use an EpiPen in the event of a severe allergic reaction at any time during the study. A physical exam/fitness assessment will be done at study screening, study entry, and the final visit. Unused extract will be collected at the final visit from participants who entered the 2-week treatment course of the study.

The reference for this study is SCSS (Sublingual Cockroach Safety Study) in the provided citation: Wood RA, Togias A, Wildfire J et al. Development of cockroach immunotherapy by the Inner-City Asthma Consortium. J Allergy Clin Immunol. 2014 Mar;133(3):846-52. PubMed ID: 24184147).

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 28

Inclusion Criteria

Not provided

Exclusion Criteria

Have severe, persistent asthma (according to National Asthma Education and Prevention Program [NAEPP] classification) as evidenced by those who require a dose of greater than 500 mcg of fluticasone/day or equivalent of another inhaled corticosteroid OR who have been hospitalized for asthma within 6 months prior to study entry
Life-threatening asthma exacerbation requiring intubation or mechanical ventilation or resulting in a hypoxic seizure in the 2 years prior to study entry
History of anaphylaxis of Grade 2 or higher as defined in the protocol
Unstable angina, significant arrhythmia, uncontrolled hypertension, or other chronic or immunologic diseases that, in the opinion of the investigator, may interfere with the study or pose additional risk to the patient. More information about this criterion can be found in the protocol.
Taking medications that could induce gastrointestinal reactions during the study. Participants taking such medications must prove to be stable with no side effects for at least 3 months prior to study screening to be considered eligible.
Received an investigational drug in the 30 days prior to study entry OR plan to receive an investigational drug during the study
Received allergen immunotherapy in the 180 days prior to screening or plan to initiate or resume allergen immunotherapy during the study
Taking tricyclic antidepressants or beta-adrenergic blocker drugs
Received omalizumab in the 3 months prior to study screening
Known contraindication to therapy with cockroach extract used in this study
Mental illness that would interfere with the participant's ability to comply to study requirements
History of drug or alcohol abuse that, in the opinion of the investigator, would interfere with the study
Plan to leave study area during the study
Does not primarily speak English, including caretakers of participants when the participant is a child
Cannot perform spirometry
Pregnant or breastfeeding

Study & Design

Study Type: INTERVENTIONAL

Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
German Cockroach Allergen Dosing Group	Glycerinated German cockroach allergenic extract	Glycerinated German Cockroach Allergenic Extract
German Cockroach Allergen Dosing Group	Placebo	Glycerinated German Cockroach Allergenic Extract

Primary Outcome Measures

Name	Time	Method
Proportion of Participants Who Discontinue Study	Initial placebo dose to end of 2-week treatment course (maximum study dose)	Proportion of participants who discontinued study for any reason following initiation of treatment (any participant who receives the initial placebo dose will be considered initiated onto treatment)

Secondary Outcome Measures