NCT01641991

Assessment of the Immunogenicity and Safety of a Dose-Sparing BioThrax® AVA Schedule

A Randomized Trial for the Assessment of Immunogenicity and Safety of Four Different Dosing Regimens of BioThrax® for Post-Exposure Prophylaxis for Anthrax in Adults

• Status: Completed
• Phase: Phase 4
• Study type: Interventional
• Enrollment: 328 (actual)
• Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) · NIH
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Accepted

Summary

A Phase IV, randomized, multicenter trial to assess the immunogenicity and safety of BioThrax® in varying dose regimens with the primary objective of obtaining information on possible dose-sparing strategies in the event of a major biothreat.

Detailed description

This is a Phase IV, randomized, open-label immunogenicity and safety study to evaluate four dosing regimens of BioThrax® for Post-Exposure Prophylaxis (PEP) for anthrax. BioThrax® will be administered as a subcutaneous (SC) injection for the primary series and will be administered as an intramuscular (IM) injection for the boost. The four dosing regimens are: 0.50mL BioThrax® on Days 0, 14, and 6 month boost; 0.50mL BioThrax® on Days 0, 28 and 6 month boost; 0.50mL BioThrax® on Days 0, 14, 28 and 6 month boost and 0.25mL BioThrax® on Days 0, 14, and 28, 6 month boost with 0.50ml IM Approximately 300 subjects will be randomized 1:1:1:1 to one of the four study arms. Enrollment will be stratified by gender, with approximately equal numbers of males and females (18 through 65 years) enrolled into each dosing regimen. The Primary objective is to evaluate the immunogenicity of the four dosing regimens of BioThrax® using the Toxin Neutralization Assay (TNA). The secondary objective is to evaluate the safety of the four dosing regimens of BioThrax®.

Conditions

• Bacillus Anthracis (Anthrax)

Interventions

Type	Name	Description
BIOLOGICAL	BioThrax®	BioThrax® is a sterile, milky white suspension made from cell free filtrates of microaerophilic cultures of an avirulent, nonencapsulated strain of Bacillus anthracis, will be administered as a 0.50mL IM injection 6 month boost for all groups
BIOLOGICAL	BioThrax®	BioThrax® will be administered as: Arm A: 0.50mL SC injection on Days 0 and 14; Arm B: 0.50mL SC injection on Days 0 and 28; Arm C: 0.50mL SC injection on Days 0, 14 and 28; Arm D: 0.25 mL SC injection on Days 0, 14 and 28.

Timeline

• Start date: 2012-07-01
• Primary completion: 2013-03-01
• Completion: 2013-06-01
• First posted: 2012-07-17
• Last updated: 2014-05-28
• Results posted: 2014-05-28

Locations

4 sites across 1 country: United States