The Safety and Utility of Skin Testing With XOLAIR® (Omalizumab) and Placebo Omalizumab (Formulation Excipients)

Study Overview
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Brief Summary
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This study enrolled 30 healthy volunteers and 30 patients with atopic asthma, for a total of 60 subjects. The study examined the tolerability of omalizumab and omalizumab excipients in two successive cohorts of subjects, healthy volunteers and patients with allergic asthma without prior exposure to omalizumab, according to a skin test protocol, consisting of a prick skin test and/or intradermal test.

Official Title
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The Safety and Utility of Skin Testing With XOLAIR® (Omalizumab) and Placebo Omalizumab (Formulation Excipients)

Conditions
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Healthy, Asthma

Intervention / Treatment
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* Drug: Cohort I
* Drug: Cohort 2


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: (Applicable to healthy subjects only) Healthy subjects not taking any regular prescription medication, without history of allergy, and considered healthy by the physician (Applicable to asthma patients only) Patients with atopic asthma diagnosed by a physician with asthma and history of positive skin test(s) Physical examination findings within normal limits Body mass index (BMI) between 18 and 30, inclusive Exclusion Criteria: Pregnancy and lactation Current or previous treatment with a biologic agent (e.g., monoclonal antibody) Concurrent disease or condition that would interfere, or for which the treatment might interfere with the conduct of the study, or that would, in the opinion of the investigator, pose an unacceptable risk to individuals in this study History or symptoms of significant psychiatric disease, including but not limited to, depression, schizophrenia, etc. History of drug abuse Participation in an investigational drug or device trial within the last 30 days prior to screening

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Healthy Volunteers<br>Healthy participants were tested sequentially in a skin prick test procedure with positive control (histamine 6 mg/mL), negative control (saline), and 1:1000, 1:100, 1:10 dilution and full concentrations of both omalizumab and omalizumab excipients. | Drug: Cohort I<br>* In sterile water for injection (SWFI), full concentration and 1:1000, 1:100, 1:10 dilutions of 125 mg/mL of standard solution of omalizumab and its excipients. Skin prick test of each dilution concentration of 1:1000, 1:100, 1:10 and full concentration and Intradermal tests of each dilution concentration of 1:1000, 1:100 and 1:10 were followed by 20 minutes of observation. For the skin prick test, participants were tested initially with positive control (histamine 6 mg/mL) and negative control (saline), and with omalizumab and its excipients simultaneously from the lowest concentration. For the intradermal test, participants were tested initially with positive control (histamine 0.1 mg/mL) and negative control (saline), and with omalizumab and its excipients simultaneously from the lowest concentration. Dilutions of omalizumab and its excipients were in SWFI.<br>|
| Experimental: Allergic Asthma Participants<br>Allergic asthma participants were tested sequentially in a skin prick test procedure with positive control (histamine 6 mg/mL), negative control (saline), and a succession of 1:1000, 1:100, 1:10 dilutions and full concentration of both omalizumab and omalizumab excipients. | Drug: Cohort 2<br>* In a saline solution, full concentration and 1:1000, 1:100, 1:10 dilutions of 125 mg/mL of standard solution of omalizumab and its excipients. Skin prick test of each dilution concentration of 1:1000, 1:100, 1:10 and full concentration and Intradermal tests of each dilution concentration of 1:100,000 and 1:10,000 were followed by 20 minutes of observation. For the skin prick test, participants were tested initially by positive control (histamine 6 mg/mL) and negative control (saline), and with omalizumab and its excipients simultaneously from the lowest concentration. For the intradermal test, participants were tested initially with positive control (histamine 0.1 mg/mL) and negative control (saline), and with omalizumab and its excipients simultaneously from the lowest concentration. Dilutions of omalizumab and its excipients were made in saline.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants by of Adverse Events Following a Skin Test Procedure | Skin test procedures were skin prick test or intradermal test. The test started with the lowest concentration. If a positive skin reaction was observed, escalation to the next dilution was stopped. Subjects were observed for 20 minutes following each test; subjects were observed for 1 hour after the last intradermal test. Those with a positive response were observed for an additional 6 hours. Severity refers to the intensity of an AE (mild, moderate or severe). Mild is itching or hives, for example. A severe event requires emergency medical treatment and can result in death. | Up to 7 days following skin testing | 
| Number of Participants Who Experienced a Positive Skin Reaction (Skin Prick Test) | For skin prick, positive control (histamine 6 mg/mL) and negative control (saline) were used. Positive skin reaction was defined as a ≥ 3-mm wheal and/or > 10-mm erythema from negative control. The skin prick test started with the lowest concentration. If a positive skin reaction was observed, escalation to the next dilution was stopped. | on the day of skin test | 
| Number of Participants Who Experienced a Positive Skin Reaction (Intradermal Test in Healthy Volunteers) | For intradermal testing, positive control (histamine 0.1 mg/mL) and negative control (saline) were used. Positive skin reaction was defined as a ≥ 3-mm wheal and/or > 10-mm erythema from negative control. The intradermal test started with the lowest concentration. If a positive skin reaction was observed, escalation to the next dilution was stopped. | on the day of skin test | 
| Number of Participants Who Experienced a Positive Skin Reaction (Intradermal Test in Patients With Allergic Asthma) | For intradermal testing, positive control (histamine 0.1 mg/mL) and negative control (saline) were used. Positive skin reaction was defined as a ≥ 3-mm wheal and/or > 10-mm erythema from negative control. The intradermal test started with the lowest concentration. If a positive skin reaction was observed, escalation to the next dilution was stopped. | on the day of skin test | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Xolair, Asthma, Skin Tests