Phase 2
Completed N=168
A Phase 2 Safety and Immunogenicity Study for an Anthrax Vaccine Using 3 Schedules and Two Dose Levels
Source: ClinicalTrials.gov NCT01770743 ↗Enrolled (actual)
168
Serious AEs
1.8%
Results posted
Feb 2015
Primary outcomePrimary: Toxin Neutralizing Antibody (TNA) Level at Day 63 — 56.8; 100; 100; 90.2 percentage of participants
Summary
The purpose of this study is to assess the safety and immunogenicity of an anthrax vaccine. The vaccine schedule and dose will also be assessed.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Toxin Neutralizing Antibody (TNA) Level at Day 63 |
56.8; 100; 100; 90.2; 52.4 | — |
| PRIMARY Incidence of Adverse Events |
36; 26; 17; 35; 15 | — |
| PRIMARY Incidence of Serious Adverse Events |
2; 0; 0; 0; 1 | — |
| PRIMARY Incidence of Reactogenicity By Severity |
11; 17; 14; 19; 8; 6 | — |
| PRIMARY Incidence of Clinical Laborabory Abnormalities |
39; 29; 20; 42; 19; 8 | — |
| PRIMARY Incidence of Immunologically Significant Adverse Events of Special Interest |
0; 0; 0; 0; 0 | — |
| SECONDARY TNA Level at Day 42 |
86.5; 100; 94.4; 97.6; 70.0 | — |
| SECONDARY TNA Level at Day 28 |
83.8; 11.1; 94.4; 63.4; 47.6 | — |
| SECONDARY TNA Seroconversion Rate |
63.9; 55.6; 77.8; 22.0; 14.3; 97.3 | — |
Eligibility Criteria
Inclusion Criteria
- Be 18-50 years old
- Be in good health
- Have access to a computer and the internet so you can complete a diary
- Agree to abstain from sex the first 84 days of the study or practice birth control if you are a woman who is able to get pregnant
- Have not donated blood for the previous 8 weeks
Exclusion Criteria
- A known anaphylactic response, severe systemic response, or serious hypersensitivity reaction to a prior immunization.
- A history of latex allergy.
- Have received a shot (vaccine), including flu shots, in the past 6 weeks or plan to get a shot for 4 weeks after the last study shot is given.
- Have previously served in the military any time after 1990 or plan to enlist in the military from Screening through Day 84.
- Prior immunization with anthrax vaccine, recombinant protective antigen (rPA) vaccine, or known exposure to anthrax organisms.
- Have participated in anthrax therapeutic or vaccine studies (monoclonal anti-PA or anthrax immune globulins or anthrax vaccines).
- Participation in any investigational study involving use of a pharmacological intervention within 30 days before the Screening visit or planning to participate in a study requiring dosing through the 12-month safety follow-up telephone call.
- Have a known diagnosis of any immunodeficiency disease including but not limited to: acquired immune deficiency syndrome (AIDS), common variable immunodeficiency disease, immunoglobulin A (IgA) deficiency, or hypogammaglobulinemia.
- Past history of significant autoimmune disease such as rheumatoid arthritis, lupus erythematous, psoriasis in the area of vaccinations, or requires immunotherapy, glomerulonephritis, or autoimmune thyroiditis.
- Have received immunosuppressive therapy with cytotoxic drugs or Rituximab within the past 2 years.
- A history of cytotoxic chemotherapy or radiation therapy.
- Chronic (>10 days) daily oral or parenteral corticosteroid therapy in the past 12 months.
- Any lung disease, including reactive airway disease, which requires the daily use of medications.
- A female currently breastfeeding or with a positive pregnancy test.
- A history of drug or alcohol abuse within 12 months prior to Screening, or a positive result on a urine drug screen for cocaine, marijuana, opiates, methamphetamines, benzodiazepines, or oxycodone.
- Any tattoo or other skin condition in the deltoid region on either arm that may obscure the assessment of the injection sites.
- A medical condition that, in the opinion of the PI or designee, could adversely impact the subject's participation or safety or the conduct of the study.
- Any planned elective in-patient surgery during the study period.
Data sourced from ClinicalTrials.gov (NCT01770743). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.