Immunologic Memory (Supp. of ATN 024)

February 27, 2017 updated by: University of North Carolina, Chapel Hill

Correlates of HBV-Specific B Cell Memory Following Vaccination in HIV-Infected Adolescents and HIV-Uninfected Adolescents: A Substudy of ATN 024 and ATN 025

This is an exploratory, laboratory-based evaluation of cellular immune response to immunization with hepatitis B surface antigen in HIV-infected and HIV-uninfected adolescents. This is a substudy of ATN 024 and ATN 025. This substudy will compare cellular immune response in responders and nonresponders to immunization and also evaluate the relationship of these factors to the persistence of known correlates of serologic protection for the hepatitis B virus.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This substudy will enroll volunteers from participants of ATN 024 and ATN 025. Participants in ATN 024 are HIV-infected youths aged 12-24 years while participants in ATN 025 are HIV-uninfected youths aged 12-17 years. These youths must also be negative for HBV core antibody, HBV surface antigen, and HBV surface antibody to be eligible.

Blood will be drawn from study participants prior to immunization, 1 month after completion of primary immunization and at study exit (week 72 for ATN 024 and week 76 for ATN 025) for cytokine assays and enumeration of antibody-secreting cells. In addition, the antibody to HBV surface antigen will be determined 2 and 4 weeks after supplemental immunization in nonresponders to the primary series and at study exit.

This laboratory substudy is designed to evaluate some aspects of cellular immune response to hepatitis B vaccination that are directly related to the generation and durability of antibody response to HBV surface antigen in HIV-infected and HIV-uninfected adolescents. Cytokine production by peripheral mononuclear cells will be determined following in-vitro stimulation, and antibody-secreting cells will be enumerated.

Study Type

Interventional

Enrollment (Actual)

95

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Los Angeles, California, United States, 90027
        • Childrens Hosp of Los Angeles
      • San Franciso, California, United States, 94118
        • University of California at San Francisco
    • District of Columbia
      • Washington, District of Columbia, United States, 20010
        • Children's Hosp Natinal Med Center
    • Louisiana
      • New Orleans, Louisiana, United States, 70112
        • Tulane Med Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

12 years to 25 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Subjects that are eligible for participation in ATN 024 and ATN 025 are eligible for ATN 048. Subjects consented for ATN 024 or ATN 025 should be consented for ATN 048 at the same time. A written informed assent/consent must be obtained from the subject along with written parental/legal guardian permission as determined by the local IRB before any study-related procedures are performed.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: A1: ATN 024 Energix-B Standard Adult Dose
Biological: Engerix B
Standard adult dose for A1; increased adult dose for A2. Doses at Entry, Weeks 4 and 24. Non-responders (<10 IU/mL of antibody at week 28/4 weeks after dose #3) will receive Engerix-B increased adult dose at Week 48.
Other Names:
  • There are no other names.
Experimental: A2: ATN 024 Engerix-B Increased Adult Dose
Biological: Engerix B
Standard adult dose for A1; increased adult dose for A2. Doses at Entry, Weeks 4 and 24. Non-responders (<10 IU/mL of antibody at week 28/4 weeks after dose #3) will receive Engerix-B increased adult dose at Week 48.
Other Names:
  • There are no other names.
Active Comparator: A3: ATN 024 Twinrix Standard Adult Dose
Biological: Twinrix for ATN 024
Standard adult dosage, taken at Entry, Weeks 4 and 24. Non-responders (<10 IU/mL of antibody at week 28/4 weeks after dose #3) will receive Engerix-B increased adult dose at week 48.
Other Names:
  • There are no other names.
Experimental: B1: ATN 025 Recombivax
Biological: Recombivax
Dosage at entry and week 24; non-responders ((<10 IU/mL of antibody at week 28/4 weeks after dose #3) will receive 3rd dose of Recombivax during weeks 48-72.
Other Names:
  • There are no other names.
Experimental: B2: ATN 025 Twinrix
Biological: Twinrix for ATN 025
Doses at Entry and Week 24. Non-responders (<10 IU/mL of antibody at week 28/4 weeks after dose #3) will receive a dose of Recombivax during week 48-72.
Other Names:
  • There are no other names.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
To measure interferon-γ (IFN-γ), interleukin -4 (IL-4), and interleukin-10 (IL-10) production in serologic responders and non-responders.
Time Frame: Before and one month after receipt of primary series of immunization.
Before and one month after receipt of primary series of immunization.
To measure concentration of hepatitis B antibodies in serologic responders and non-responders.
Time Frame: 1, 2, and 4 weeks after supplemental vaccine dose.
1, 2, and 4 weeks after supplemental vaccine dose.
To measure concentration of antibody-secreting cells in serologic responders and non-responders.
Time Frame: Before and one month after receipt of primary series of immunization.
Before and one month after receipt of primary series of immunization.

Secondary Outcome Measures

Outcome Measure
Time Frame
Measure whether the profile of cytokine secretion or the number of antibody-secreting cells can be used as a predictor of anamnestic response to a supplemental vaccine dose following serologic nonresponse to a primary series of immunization.
Time Frame: Prior to immunization, 1 month after primary immunization, at study exit (week 72 for ATN 024; week 76 for ATN 025); at 2 & 4 weeks after supplemental immunization in nonresponders, & at study exit for ATN 024 subjects.
Prior to immunization, 1 month after primary immunization, at study exit (week 72 for ATN 024; week 76 for ATN 025); at 2 & 4 weeks after supplemental immunization in nonresponders, & at study exit for ATN 024 subjects.
To compare the rate of loss of antibody-secreting cells after vaccination through the end of the study in each vaccine arm.
Time Frame: Prior to immunization, 1 month after completion of primary immunization and at study exit.
Prior to immunization, 1 month after completion of primary immunization and at study exit.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of North Carolina, Chapel Hill

Collaborators

National Institute on Drug Abuse (NIDA)
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
National Institute of Mental Health (NIMH)

Investigators

  • Study Chair: Stephen Obaro, MBBS, PhD, ATN

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

August 1, 2005

Primary Completion (Actual)

November 1, 2007

Study Completion (Actual)

November 1, 2007

Study Registration Dates

First Submitted

August 31, 2005

First Submitted That Met QC Criteria

August 31, 2005

First Posted (Estimate)

September 2, 2005

Study Record Updates

Last Update Posted (Actual)

February 28, 2017

Last Update Submitted That Met QC Criteria

February 27, 2017

Last Verified

February 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ATN 048

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Subscribe