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SA3Ag vaccine

Phase 1

Bacterial Infections | Vaccine | Oncology |Pfizer, Inc.|Trials Updated: Apr 24, 2014

SA3Ag vaccine development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Nov 2009

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment449

FDA Designations

No designations recorded

SA3Ag vaccine clinical trials

SA3Ag vaccine · 1 trial · 5 indications

Phase 1 1
NCT01018641An Evaluation Of Three Dose Levels Of 3-Antigen Staphylococcus Aureus Vaccine (SA3Ag) In Healthy AdultsBacterial Infections
COMPLETED449 Analytics
PHASE1COMPLETED
An Evaluation Of Three Dose Levels Of 3-Antigen Staphylococcus Aureus Vaccine (SA3Ag) In Healthy Adults
Bacterial InfectionsUnlock trial analytics

Study Endpoints

Primary Endpoints

The primary immunogenicity endpoint in stage 1 is antigen-specific antibody levels using an Ig binding assay (Ig titers) 28 days after vaccination at visit 1 in the 50- to 85-year age stratum at each vaccine group (3 SA3Ag dose levels and placebo).
1 month
The primary comparison of interest is a 2-fold increase in Ig titers relative to baseline for each antigen.
1 month

Secondary Endpoints

The secondary immunogenicity endpoints are Ig titers for each antigen (CP5, CP8, and rClfAm) 28 days after vaccination in the 18- to 24-year age stratum at each dose level cohort.
1 month
Ig titers for each antigen 28 days after the booster dose.
7 months
The safety endpoints are solicited and unsolicited AEs, SAEs, and hematologic and urine parameters.
12 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
1EXPERIMENTALSA3Ag in both stage 1 and stage 2
2EXPERIMENTALSA3Ag in stage 1 followed by placebo in stage 2.
3PLACEBO_COMPARATORPlacebo in both stage 1 and stage 2
4EXPERIMENTALSA3Ag in stage 1 and no vaccine in stage 2.
5PLACEBO_COMPARATORPlacebo in stage 1 and no vaccine in stage 2.

Interventions

NameTypeDescription
SA3Ag vaccineBIOLOGICALIn stage 1, each subject will receive 1 injection (0.5 mL) of one of the following doses: Low dose level 10 μg of CP5 and CP8 and 20 μg of rClfAm Mid-dose level 30 μg of CP5 and CP8 and 60 μg of rClfAm High dose level 100 μg of CP5 and CP8 and 200 μg of rClfAm In stage 2 the subject will receive 0.5 mL IM of the same dose level he/she received in stage 1.
Blood drawPROCEDUREBlood for immunogenicity will be taken at timepoints throughout stage 1 and stage 2. Blood for hematology will be done in a select subset of subjects in stage 1.
Colonization swab samplesPROCEDUREColonization swabs will be taken at timepoints throughout stage 1 and stage 2.
SA3Ag followed by PlaceboBIOLOGICALIn stage 1, each subject will receive 1 injection (0.5 mL) of one of the following doses: Low dose level 10 μg of CP5 and CP8 and 20 μg of rClfAm Mid-dose level 30 μg of CP5 and CP8 and 60 μg of rClfAm High dose level 100 μg of CP5 and CP8 and 200 μg of rClfAm In stage 2 the subject will receive one injection of 0.5 mL IM of the placebo.
PlaceboBIOLOGICALIn both stage 1 and stage 2, recipients will receive one injection (0.5 mL) IM of 150 mM (isotonic) NaCl for a total of 2 injections throughout the study.
SA3Ag with no booster in stage 2BIOLOGICALIn stage 1, each subject will receive 1 injection (0.5 mL) of one of the following doses: Low dose level 10 μg of CP5 and CP8 and 20 μg of rClfAm Mid-dose level 30 μg of CP5 and CP8 and 60 μg of rClfAm High dose level 100 μg of CP5 and CP8 and 200 μg of rClfAm In stage 2 the subject will receive no vaccine.
Placebo with no booster in stage 2PROCEDUREIn stage 1, recipients will receive one injection (0.5 mL) IM of 150 mM (isotonic) NaCl. In stage 2 the subject will receive no vaccine.
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Eligibility Criteria

Age Range18 Years to 85 Years
SexALL
Healthy VolunteersYes
Study Sites5

Inclusion Criteria: * Healthy adults aged 18 to 24 years or 50 to 85 years who are available for the entire duration of the study, able to be contacted by phone, and able to complete all study procedures, including completion of an electronic diary (e-diary). * Men and women who are able to have ch...

Countries:Australia
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Frequently asked questions about SA3Ag vaccine

What is the SA3Ag vaccine?

The SA3Ag vaccine is an investigational 3-antigen Staphylococcus aureus vaccine developed by Pfizer, Inc. It is designed to prevent bacterial infections caused by Staphylococcus aureus, including staphylococcal skin infections. It is a vaccine modality and has been studied in healthy adult volunteers.

What is the SA3Ag vaccine used for?

The SA3Ag vaccine is being developed for the prevention of bacterial infections, specifically Staphylococcal infections and Staphylococcal skin infections. It is intended for use in healthy adults. It remains investigational and is not an approved product.

Who makes the SA3Ag vaccine?

The SA3Ag vaccine is developed by Pfizer, Inc., which trades on the New York Stock Exchange under the ticker PFE. Pfizer sponsored the clinical evaluation of the vaccine in healthy adults.

What phase is the SA3Ag vaccine in?

The SA3Ag vaccine is in Phase 1 clinical development. It is investigational and has not been approved by the FDA. The Phase 1 trial evaluating the vaccine has been completed.

What clinical trials is the SA3Ag vaccine in?

The SA3Ag vaccine has been studied in one completed Phase 1 trial, NCT01018641, titled An Evaluation Of Three Dose Levels Of 3-Antigen Staphylococcus Aureus Vaccine (SA3Ag) In Healthy Adults. The trial enrolled 449 healthy adult participants in Australia and was randomized, double-blind, and placebo-controlled.