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Immune Response In Children Revaccinated With Pneumococcal Conjugate Vaccine (REPLAY)

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00853749
First Posted: March 2, 2009
Last Update Posted: January 5, 2011
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Collaborator:
Pfizer
Information provided by:
Wyeth is now a wholly owned subsidiary of Pfizer
  Purpose
The primary purpose of this study is to evaluate the immune response to 13-valent pneumococcal conjugate vaccine (13vPnCV) in children who as infants received either a complete series of PnCV versus a combination of PnCV and pneumococcal polysaccharide vaccine (PSV). This study is also intended to evaluate the safety of the 13vPnC.

Condition Intervention Phase
Invasive Pneumococcal Disease Biological: 13-valent pneumococcal conjugate vaccine (13vPnC) Procedure: Blood draw Phase 3

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Official Title: Revaccination With Pneumococcal Conjugate Vaccine - Characterization Of The Immune Response After Polysaccharide

Resource links provided by NLM:


Further study details as provided by Wyeth is now a wholly owned subsidiary of Pfizer:

Primary Outcome Measures:
  • Percentage of Participants Achieving a Predefined Serotype-specific Immunoglobulin G (IgG) Antibody Concentration Greater Than or Equal to ( ≥) 0.35 Micrograms Per Milliliter (Mcg/mL) Measured 1 Month After Vaccination [ Time Frame: Day 28 ]
    Percentage of participants achieving predefined antibody threshold ≥ 0.35 mcg/mL along with the corresponding 95 percent (%) Confidence Interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based on the observed proportion of participants.

  • Percentage of Participants Achieving Opsonophagocytic Assay (OPA) Titers ≥ 1:8 Measured 1 Month After Vaccination [ Time Frame: Day 28 ]
    Percentage of participants achieving OPA along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based on the observed proportion of participants.


Secondary Outcome Measures:
  • Antibody Response Measured 1 Month After Vaccination (Avidity Assay) [ Time Frame: Day 28 ]
    Avidity assay had measurable range of 0.117 to 7.5. Results expressed as avidity index (AI). Geometric mean avidity presented for 3 common pneumococcal serotypes (serotype 6B, 19F, and 23F) and 2 additional pneumococcal serotypes specific to 13vPnC (Serotypes 1 and 5).

  • Antibody Response Measured 1 Month After Vaccination (OPA) [ Time Frame: Day 28 ]
    Antibody response as measured by OPA, 1 month after vaccination. Geometric mean titers (GMTs) calculated using all participants with available data for the specified blood draw. CIs were back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.


Enrollment: 89
Study Start Date: May 2009
Study Completion Date: August 2010
Primary Completion Date: August 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Single
All subjects will receive a single dose of 13vPnC
Biological: 13-valent pneumococcal conjugate vaccine (13vPnC)
0.5 mL intramuscular injection
Procedure: Blood draw
Collection of 10 mL of blood

Detailed Description:
Follow-up measure for the EMEA supporting a Type II variation for Prevenar (PCV7) label
  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   5 Years to 8 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Fully vaccinated children who participated in a previous Wyeth study (Study D139-P506) and received a booster dose of either 23-valent pneumococcal polysaccharide vaccine (PPV23) or pneumococcal conjugate vaccine (PnCV) per the original protocol for that study.
  • Subjects must be in good health as determined by medical history, physical examination and clinical judgment.

Exclusion Criteria:

  • Known allergy to any component of the 7-valent pneumococcal conjugate vaccine (7vPnC) or 13-valent pneumococcal conjugate vaccine (13vPnC).
  • History of documented invasive pneumococcal disease (defined as a positive culture of S. pneumoniae from a normally sterile body site).
  • Any known or suspected disease or dysfunction of the immune system, including: HIV infection, Malignancy, Receipt of immunosuppressive therapy, Sickle cell hemoglobinopathy.
  • Receipt of immune-globulin within the past 3 months.
  • Receipt of either PSV or 7vPnCV since the completion of Study D139-P506.
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00853749


Locations
Iceland
Pfizer Investigational Site
Reykjavik, Iceland, 101
Sponsors and Collaborators
Wyeth is now a wholly owned subsidiary of Pfizer
Pfizer
Investigators
Study Director: Pfizer CT.gov Call Center Pfizer
  More Information

Additional Information:
Responsible Party: Director, Clinical Trial Disclosure Group, Wyeth
ClinicalTrials.gov Identifier: NCT00853749     History of Changes
Other Study ID Numbers: 6096A1-3013
B1851012
First Submitted: February 19, 2009
First Posted: March 2, 2009
Results First Submitted: December 16, 2010
Results First Posted: January 5, 2011
Last Update Posted: January 5, 2011
Last Verified: December 2010

Keywords provided by Wyeth is now a wholly owned subsidiary of Pfizer:
Immune response
pneumococcal conjugate vaccine
polysaccharide

Additional relevant MeSH terms:
Pneumococcal Infections
Streptococcal Infections
Gram-Positive Bacterial Infections
Bacterial Infections
Vaccines
Heptavalent Pneumococcal Conjugate Vaccine
Immunologic Factors
Physiological Effects of Drugs