Cytomegalovirus Cell-Mediated Immunity

September 5, 2013 updated by: National Institute of Allergy and Infectious Diseases (NIAID)

Cell-Mediated Immune Responses to Cytomegalovirus gB/MF59 Vaccine

Cytomegalovirus (CMV) is an important cause of illness and occasional deaths in infants who catch the virus before they are born, in newborns, and in children and adults who have weak immune systems. The purpose of this study is to look at how the CMV vaccine works in the blood. This study is being done along with the main CMV gB/MF59 vaccine study that looks at how the overall body reacts to the vaccine. Participants will include up to 100 healthy adolescent female subjects aged 12 to 17 years who were vaccinated in study 04-039 and 100 subjects that were screened for 04-039 to participate as controls. Study procedures will include up to 6 blood draws taken over a 13 month period. Participation will be about 31 months (unless the patient enrolls into the shedding study).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

Cytomegalovirus (CMV) is an important cause of morbidity and occasional mortality in congenitally infected infants and immuno-compromised children and adults, especially human immunodeficiency virus (HIV)-infected individuals and transplant recipients. Newborn infants represent a particularly high-risk group. This study of cell-mediated immune responses to cytomegalovirus GB/MF59 vaccine is a substudy of Division of Microbiology and Infectious Diseases, NIAID, NIH, DHHS (DMID) protocol 04-039, "A Randomized, Double-Blind, Placebo-Controlled, Phase II Study to Assess the Safety and Efficacy of the Cytomegalovirus gB/MF59 Vaccine in Preventing Systemic Cytomegalovirus Infection in Healthy Adolescent Females." This vaccine trial is designed to test the safety and efficacy of the CMV gB/MF59 vaccine. Primary goals of this study are to assess whether injection with 3 doses of the CMV gB/MF59 vaccine induces significant CD4+, CD8+ and/or regulatory T cell immune responses; to evaluate the boosting affect of gB/MF59 on the CMV-specific T cell responses after each of 3 doses of vaccine; to evaluate the persistence of CMV-specific T cell responses after vaccination; and to evaluate CMV-specific T cell responses in subjects that seroconvert during the vaccine trial. New techniques for the enumeration and characterization of antigen specific T cells are now available that will facilitate a precise analysis of the magnitude and functional capacity of influenza virus-specific T cells. All subjects enrolled in the CMV gB/MF59 trial at Vanderbilt and Cincinnati study sites will be eligible for enrollment in the cell-mediated immune response sub-study. Blood draws for assessment of cellular immune response will be obtained in 3 phases. Phase 1, N=50: at visit 1, the initial 100 consented subjects to recruit approximately 50 seropositive subjects (based on a 60 percent seropositive rate). Samples from this phase of the study will be used to establish the optimal conditions for the assay and to compare natural infection with vaccine induced T cell responses. Phase 2, N=50-100: at day 0 (before 1st dose of vaccine), day 30 (before the second dose of vaccine), day 60 (1 month after the second dose of vaccine), day 210 (1 month after the last dose of vaccine), and day 390 (7 months after the last dose of vaccine). Samples from this phase will be used to evaluate the boosting affect of gB/MF59 after each of 3 doses of vaccine and to evaluate the persistence of CMV-specific T cell responses. Phase 3: at each visit (S1-S8) for those subjects that seroconvert (i.e. if subject seroconverts at visit 10 blood will be obtained at visits S1-S8). These samples will be used to compare CMV-specific responses in subjects that either did or did not receive the vaccine and seroconvert during the study. These time points are based on the vaccine study design and the previous work evaluating T cell responses to vaccination 1 month and 6 months after immunization. Researchers will collect 30 ml of blood per draw in this trial enrolling up to 100 healthy adolescent females 12-17 years of age, inclusive. Blood volumes were determined to ensure sufficient numbers of cells to establish stimulation protocols and evaluate cell-mediated immune responses. The study duration will be 43 months. Subject duration will be 31 months, unless the subject seroconverts and enrolls into the shedding study. This study is linked to DMID protocol 04-039.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
165

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
    • Ohio
      • Cincinnati, Ohio, United States, 45229-3026
        • Cincinnati Children's Hospital Medical Center - Infectious Diseases
    • Tennessee
      • Nashville, Tennessee, United States, 37232-0011
        • Vanderbilt University - Pediatric - Infectious Diseases

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

12 years to 17 years (Child)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Sampling Method

Non-Probability Sample

Study Population

A convenience sample of up to 100 healthy participants, ages 12-17 years, who were vaccinated in 04-039. Additionally, 100 screened subjects enrolled to serve as positive/negative controls.

Description

Inclusion Criteria:

  • Parent/legal guardian and subjects who understand and sign the assent as well as consent forms for this study.
  • Subjects who qualify for the Division of Microbiology and Infectious Diseases, NIAID, NIH (DMID) study 04-039, "A Randomized, Double-Blind, Placebo-Controlled, Phase II Study to Assess the Safety and Efficacy of the Cytomegalovirus gB/MF59 Vaccine in Preventing Systemic Cytomegalovirus Infection in Healthy Adolescent," will be eligible for the initial pre-vaccination blood draw.
  • Subjects who meet all inclusion criteria for the DMID 04-039 study and who are vaccinated will be allowed to participate in the remaining portions of this study.

Exclusion Criteria:

All subjects who are ineligible for the main DMID 04-039 study will not be eligible for the cell-mediated immunity sub-study.

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

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Protocol 04-039 subjects
At least 50 and maximum of 100 healthy adolescent female subjects aged 12-17 years who were vaccinated in protocol 04-039 will be enrolled.
Positive and Negative Controls
Approximately 100 screened subjects will be enrolled to serve as positive and negative controls.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Immunogenicity based on cytomegalovirus (CMV) specific cell-mediated immunity.
Time Frame: Measured 30 days after the first dose, 30 days after the second dose, 30 days after the third dose and 7 months after the third dose of vaccine.
Measured 30 days after the first dose, 30 days after the second dose, 30 days after the third dose and 7 months after the third dose of vaccine.

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
National Institute of Allergy and Infectious Diseases (NIAID)

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2006

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 1, 2011

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 1, 2011

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 26, 2008

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 26, 2008

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 29, 2008

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 9, 2013

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 5, 2013

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 06-0043
  • N01AI80007C

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.

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