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Bacterial InfectionsPhase 1NCT01018641

An Evaluation Of Three Dose Levels Of 3-Antigen Staphylococcus Aureus Vaccine (SA3Ag) In Healthy Adults

A Phase 1 study testing SA3Ag vaccine, Blood draw and Colonization swab samples in people with Bacterial Infections and Staphylococcal Vaccines, run by Pfizer at 5 sites in Australia.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This study is a first-in-human (Phase 1) study using three dose levels of an investigational vaccine directed against Staphylococcus aureus (SA3Ag). This study is primarily designed to assess how safe and well tolerated SA3Ag is, but will also describe the immune response over 12 months elicited by SA3Ag. Read more about this study

Who is it for?
Ages 18 to 85 yearsHealthy volunteers can take part
What is being tested?
SA3Ag vaccine, Blood draw and Colonization swab samples
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
449 participants
Where
5 sitesAustralia
Study dates
Jan 2010to Jul 2011
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 85 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • 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 children, must use a reliable method of birth control for the duration of the study.

Who cannot join

  • Any major illness that would substantially increase the risk associated with participation in the study, or interfere with the evaluation of the study objectives - this is determined by the local physician.
  • Donation of 250 mL or more of blood within the last 3 months.
  • Condition associated with prolonged bleeding time, including subjects taking anticoagulant medication or antiplatelet therapy.
  • Any contraindication to vaccination or vaccine components.
  • Immunocompromised persons and subjects who receive treatment with immunosuppressive therapy.
  • Previous administration of S. aureus vaccination.
Show all 12Show fewer
  • Receipt of blood products or immunoglobulins within 12 months prior to study
  • Participation in another trial (not including observational trials) within the last 30 days.
  • Study site personnel or immediate family members (first-degree relatives).
  • Women who are pregnant (as determined by urine pregnancy test) or breast-feeding.
  • Residence in a nursing home or long-term care facility or requirement for semiskilled nursing care.
  • For subjects aged 65 years or older, a Mini-Mental State Examination (MMSE) score of <=21.

Trial locations and contacts

5 sites in 1 country.

5 sites in 1 country

Australia5 sites
  • Pfizer Investigational Site

    Adelaide, South Australia, 5000

  • Pfizer Investigational Site

    Herston, Queensland, 4029

  • Pfizer Investigational Site

    North Adelaide, South Australia, 5006

  • Pfizer Investigational Site

    Prahran, Victoria, 3004

  • Pfizer Investigational Site

    Subiaco, Western Australia, 6008

Other trials in Australia

About this study

Official title: A Phase 1 Trial To Evaluate The Safety, Tolerability, And Immunogenicity Of 3 Ascending Dose Levels Of A 3-Antigen Staphylococcus Aureus Vaccine (SA3Ag) In Healthy Adults

This study is a first-in-human (Phase 1) study using three dose levels of an investigational vaccine directed against Staphylococcus aureus (SA3Ag). This study is primarily designed to assess how safe and well tolerated SA3Ag is, but will also describe the immune response over 12 months elicited by SA3Ag. Additionally, this study will assess the effect of SA3Ag vaccine on the number of Staphylococcus aureus bacteria that naturally occur on the skin and within the nose and throat.

Being tested
SA3Ag vaccine, Blood draw, Colonization swab samples, SA3Ag followed by Placebo, Placebo
Keywords
Staphylococcus aureus, Vaccine
Medical subject headings
Bacterial Infections, Motor Activity, Staphylococcal Skin Infections, Staphylococcal Infections

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • SA3Ag vaccineBiological

    In 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 drawProcedure or surgery

    Blood 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 samplesProcedure or surgery

    Colonization swabs will be taken at timepoints throughout stage 1 and stage 2.

  • SA3Ag followed by PlaceboBiological

    In 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.

  • Blood drawProcedure or surgery

    Blood 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 samplesProcedure or surgery

    Colonization swabs will be taken at timepoints throughout stage 1 and stage 2.

  • PlaceboBiological

    In 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.

  • Blood drawProcedure or surgery

    Blood 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 samplesProcedure or surgery

    Colonization swabs will be taken at timepoints throughout stage 1 and stage 2.

  • SA3Ag with no booster in stage 2Biological

    In 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.

  • Blood drawProcedure or surgery

    Blood 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 samplesProcedure or surgery

    Colonization swabs will be taken at timepoints throughout stage 1 and stage 2.

  • Placebo with no booster in stage 2Procedure or surgery

    In 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.

  • Blood drawProcedure or surgery

    Blood 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 samplesProcedure or surgery

    Colonization swabs will be taken at timepoints throughout stage 1 and stage 2.

Study groups in NCT01018641
Study groupRoleWhat they receive
1ExperimentalSA3Ag in both stage 1 and stage 2
Receives: Biological: SA3Ag vaccine; Procedure: Blood draw; Procedure: Colonization swab samples
2ExperimentalSA3Ag in stage 1 followed by placebo in stage 2.
Receives: Biological: SA3Ag followed by Placebo; Procedure: Blood draw; Procedure: Colonization swab samples
3Placebo comparatorPlacebo in both stage 1 and stage 2
Receives: Biological: Placebo; Procedure: Blood draw; Procedure: Colonization swab samples
4ExperimentalSA3Ag in stage 1 and no vaccine in stage 2.
Receives: Biological: SA3Ag with no booster in stage 2; Procedure: Blood draw; Procedure: Colonization swab samples
5Placebo comparatorPlacebo in stage 1 and no vaccine in stage 2.
Receives: Procedure: Placebo with no booster in stage 2; Procedure: Blood draw; Procedure: Colonization swab samples

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. 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).

    Measured: 1 month

  2. The primary comparison of interest is a 2-fold increase in Ig titers relative to baseline for each antigen.

    Measured: 1 month

Secondary outcomes (4)
  1. 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.

    Measured: 1 month

  2. Ig titers for each antigen 28 days after the booster dose.

    Measured: 7 months

  3. The safety endpoints are solicited and unsolicited AEs, SAEs, and hematologic and urine parameters.

    Measured: 12 months

  4. OPA titers for each antigen 28 days after vaccination in both age strata at selected dose level cohort(s).

    Measured: 1 month

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted23 Nov 2009 (estimated)
  2. Study startJan 2010
  3. Primary completionJan 2011
  4. Study completionJul 2011

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Care provider, Investigator
Enrolment
449 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01018641
Sponsor's protocol ID
6123K1-1007
Other IDs
B2251002
Status last verified
Apr 2014
First submitted
20 Nov 2009
Last updated
24 Apr 2014
Results posted
No
Data monitoring committee
Yes

Publications

  • Marshall H, Nissen M, Richmond P, Shakib S, Jiang Q, Cooper D, Rill D, Baber J, Eiden J, Gruber WC, Jansen KU, Anderson AS, Zito ET, Girgenti D. Safety and immunogenicity of a booster dose of a 3-antigen Staphylococcus aureus vaccine (SA3Ag) in healthy adults: A randomized phase 1 study. J Infect. 2016 Nov;73(5):437-454. doi: 10.1016/j.jinf.2016.08.004. Epub 2016 Aug 9.

    PubMed 27519620
  • Nissen M, Marshall H, Richmond P, Shakib S, Jiang Q, Cooper D, Rill D, Baber J, Eiden J, Gruber W, Jansen KU, Emini EA, Anderson AS, Zito ET, Girgenti D. A randomized phase I study of the safety and immunogenicity of three ascending dose levels of a 3-antigen Staphylococcus aureus vaccine (SA3Ag) in healthy adults. Vaccine. 2015 Apr 8;33(15):1846-54. doi: 10.1016/j.vaccine.2015.02.024. Epub 2015 Feb 21.

    PubMed 25707693

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing SA3Ag vaccine, Blood draw and Colonization swab samples in people with Bacterial Infections and Staphylococcal Vaccines, run by Pfizer at 5 sites in Australia.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 24 Apr 2014. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 5 sites in Australia. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

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). (time frame: 1 month). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01018641, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Apr 2014.

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