Cytomegalovirus InfectionPhase 1NCT00370006
Phase 1 Trial of CMV Towne Vaccine in Subjects Previously Received VCL CT02 Vaccine ID or IM
A Phase 1 study testing Towne CMV vaccine in people with Cytomegalovirus Infection, run by University of California, San Francisco.
Trial summary
Objectives of this trial are to: 1. Evaluate the kinetics and magnitude of the CMV-specific immune response post-Towne challenge (3000 pfu) in healthy CMV-seronegative volunteers who received VCL CT02 administered ID or IM 9 to 15 months previously as measured by: 1) ELISA and/or virus-neutralizing antibody titers for… Read more about this study
- Who is it for?
- Ages 18 to 45 yearsHealthy volunteers can take part
- Conditions the study is for
- Cytomegalovirus Infection
- What is being tested?
- Towne CMV vaccine
- Type of treatment
- Vaccines
- How many people
- 10 participants
- Where
- No sites listed yet
- Study dates
- Sep 2006to Aug 2007
- 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 45 years
- All sexes
- Healthy volunteers accepted
- Adult
Inclusion Criteria:18 to 45 years of age at the time of initial enrollment in trial CT02-ID; normal lab values at study entry; good general health; CMV IgG antibody test < 4 times last measured value (i.e., at Week 32 after VCL-CT02 administration in CT02-ID was initiated)
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Exclusion Criteria:CMV seropositive; recent vaccination(s); immunodeficiency; vaccination with investigational CMV vaccine(s) other than VCL-CT02 ; pregnant or breast-feeding
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About this study
Official title: A Phase 1 Clinical Trial to Evaluate the Safety of, and Kinetics and Magnitude of the CMV-Specific Immune Response to, Challenge With a Live Attenuated Strain of CMV (Towne) in Healthy, CMV- Seronegative, Adult Subjects Who Previously Received a CMV Immunotherapeutic Trivalent pDNA Vaccine (VCL CT02) Administered Intradermally or Intramuscularly
Objectives of this trial are to:
- Evaluate the kinetics and magnitude of the CMV-specific immune response post-Towne challenge (3000 pfu) in healthy CMV-seronegative volunteers who received VCL CT02 administered ID or IM 9 to 15 months previously as measured by: 1) ELISA and/or virus-neutralizing antibody titers for gB; 2) T-cell IFN-g ELISPOT; 3) T-cell proliferation assays (CFSE) for IE1, pp65, and/or gB; and possibly 4) cytokine and phenotypic flow cytometry responses to pp65, IE1, and/or gB.
- Evaluate the safety safety of Towne challenge in healthy CMV-seronegative adult subjects who have previously been immunized with a trivalent pDNA CMV vaccine (VCL-CT02) administered intramuscularly (IM) or intradermally (ID).
Our hypothesis is that the immune response to Towne vaccine 3000 pfu challenge after VLC-CT02 priming will be greater than that after Towne vaccination alone (concurrent controls will be administered Towne alone in a concurrent, companion trial).
Read the detailed description
This is a Phase 1, single-center, open-label trial of the live, attenuated Towne CMV vaccine administered as a "challenge" to healthy, CMV-seronegative, adult subjects who previously received the CMV immunotherapeutic trivalent pDNA-based vaccine, VCL-CT02, given by intradermal or intramuscular routes as described in the following table; these subjects have been followed for 32 weeks.
Table 6.1 Subject Distribution Group Formulation Dosing Regimen (day) Dose per Injection(Administered to the deltoid region) Route of Administration Number of Subjects
- VCL-CT02 0, 28, 56 1.0 mg Intramuscular (IM) 6
- VCL-CT02 0, 28, 56 100 μg/injection × 2 injections Intradermal (ID) 11 Total 17
Up to 10 subjects from Groups 1 and 2 will be approached for enrollment in the current protocol. If a subject consents and meets all eligibility criteria, the subject will receive Towne (3000 pfu subcutaneously) between 9 and 15 months after the subject's first dose of VCL-CT02. Safety will be monitored and Both antibody to CMV gB and T-cell responses to CMV antigens will be measured at specified intervals for 252 days post Towne challenge.
- Conditions
- Cytomegalovirus Infection
- Being tested
- Towne CMV vaccine
- Keywords
- cytomegalovirus, vaccine, T cell, antibodies
- Medical subject headings
- Cytomegalovirus Infections
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Towne CMV vaccineBiological
What is being measured
The primary outcome is the main question the study is designed to answer.
CMV-specific immune response post-Towne challenge: gB antibody, T-cell IFN-g ELISPOT, T-cell proliferation assays for IE1, pp65, and/or gB, cytokine and phenotypic flow cytometry responses to pp65, IE1, gB.
Secondary outcomes (1)
Safety of Towne challenge in subjects who have previously been immunized with a trivalent pDNA CMV vaccine (VCL-CT02).
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Aug 2006 (estimated)
- Study startSep 2006
- Study completionAug 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cytomegalovirus InfectionStudies of the same condition, open and under way.
- More trials run by University of California, San FranciscoThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 10 participants
Sponsor and investigators
- Lead sponsor
- University of California, San Francisco
- Sponsor type
- University, hospital or other
- Collaborators
- Vical
- Investigators
- Mark A Jacobson, MD, Principal investigator, University of California, San Francisco
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00370006
- Sponsor's protocol ID
- Jacobson VCL CT-02 IDTC
- Status last verified
- Oct 2006
- First submitted
- 28 Aug 2006
- Last updated
- 11 Jan 2007
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 11 Jan 2007. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1 Clinical Trial to Evaluate the Safety of, and Kinetics and Magnitude of the CMV-Specific Immune Response to, Challenge With a Live Attenuated Strain of CMV (Towne) in Healthy, CMV- Seronegative, Adult Subjects Who Previously Received a CMV Immunotherapeutic Trivalent pDNA Vaccine (VCL CT02) Administered Intradermally or Intramuscularly
- ClinicalTrials.gov ID
- NCT00370006
- Acronym / sponsor ID
- Jacobson VCL CT-02 IDTC
- Conditions
- Cytomegalovirus Infection
- Keywords
- cytomegalovirus, vaccine, T cell, antibodies
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 10 participants
- Lead sponsor
- University of California, San FranciscoUniversity, hospital or other
- Collaborators
- Vical
- Study start
- Sep 2006
- Study completion
- Aug 2007
- First posted
- 30 Aug 2006 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Objectives of this trial are to:
- Evaluate the kinetics and magnitude of the CMV-specific immune response post-Towne challenge (3000 pfu) in healthy CMV-seronegative volunteers who received VCL CT02 administered ID or IM 9 to 15 months previously as measured by: 1) ELISA and/or virus-neutralizing antibody titers for gB; 2) T-cell IFN-g ELISPOT; 3) T-cell proliferation assays (CFSE) for IE1, pp65, and/or gB; and possibly 4) cytokine and phenotypic flow cytometry responses to pp65, IE1, and/or gB.
- Evaluate the safety safety of Towne challenge in healthy CMV-seronegative adult subjects who have previously been immunized with a trivalent pDNA CMV vaccine (VCL-CT02) administered intramuscularly (IM) or intradermally (ID).
Our hypothesis is that the immune response to Towne vaccine 3000 pfu challenge after VLC-CT02 priming will be greater than that after Towne vaccination alone (concurrent controls will be administered Towne alone in a concurrent, companion trial).
Detailed description
This is a Phase 1, single-center, open-label trial of the live, attenuated Towne CMV vaccine administered as a "challenge" to healthy, CMV-seronegative, adult subjects who previously received the CMV immunotherapeutic trivalent pDNA-based vaccine, VCL-CT02, given by intradermal or intramuscular routes as described in the following table; these subjects have been followed for 32 weeks.
Table 6.1 Subject Distribution Group Formulation Dosing Regimen (day) Dose per Injection(Administered to the deltoid region) Route of Administration Number of Subjects
- VCL-CT02 0, 28, 56 1.0 mg Intramuscular (IM) 6
- VCL-CT02 0, 28, 56 100 μg/injection × 2 injections Intradermal (ID) 11 Total 17
Up to 10 subjects from Groups 1 and 2 will be approached for enrollment in the current protocol. If a subject consents and meets all eligibility criteria, the subject will receive Towne (3000 pfu subcutaneously) between 9 and 15 months after the subject's first dose of VCL-CT02. Safety will be monitored and Both antibody to CMV gB and T-cell responses to CMV antigens will be measured at specified intervals for 252 days post Towne challenge.
Study design
- Primary purpose
- Prevention
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
Who may qualify
- Ages
- 18 to 45 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Towne CMV vaccine | Biological | – |
Primary outcome
CMV-specific immune response post-Towne challenge: gB antibody, T-cell IFN-g ELISPOT, T-cell proliferation assays for IE1, pp65, and/or gB, cytokine and phenotypic flow cytometry responses to pp65, IE1, gB.
1 secondary outcome
Safety of Towne challenge in subjects who have previously been immunized with a trivalent pDNA CMV vaccine (VCL-CT02).
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 11 Jan 2007.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Mark A Jacobson, MD principal investigator
University of California, San Francisco
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Towne CMV vaccine in people with Cytomegalovirus Infection, run by University of California, San Francisco.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
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 11 Jan 2007. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. 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?
CMV-specific immune response post-Towne challenge: gB antibody, T-cell IFN-g ELISPOT, T-cell proliferation assays for IE1, pp65, and/or gB, cytokine and phenotypic flow cytometry responses to pp65, IE1, gB.. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 11 Jan 2007.