HIV InfectionsPhase 2NCT00407836
Efficacy Study of T Cell Vaccination in HIV Infection
A Phase 2 study testing T cell vaccination in people with HIV Infections, run by Soroka University Medical Center at 1 site in Israel.
Trial summary
The hallmark of HIV infection and AIDS is the continuous attrition of CD4 T cells. One of the mechanisms that may account for the CD4 attrition , is autoimmunity against the CD4 T cells, caused by autologous immune cells. Read more about this study
- Who is it for?
- Ages 18 to 60 years
- Conditions the study is for
- HIV Infections
- What is being tested?
- T cell vaccination
- Type of treatment
- Vaccines, Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 40 participants
- Where
- 1 siteIsrael
- Study dates
- Nov 2006to Nov 2008
- Phase
- Phase 2
- 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 60 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- CD4 cell counts -from 150 to 450/mm3 and stable for at least 12 months, and treatment with HAART for at least 6 months.
- Positive cell proliferation assay to CD4 molecule
- Low HIV viral load (<400 - 5000 copies/ml) for at least 12 months
- No change of antiretroviral treatment for at least 6 months
- Signed informed consent
Who cannot join
- Concomitant immunosuppressive or antineoplastic treatment as well as chronic systemic glucocorticoid therapy.
- Pregnancy and women without any efficacious contraception.
- Clinically relevant liver disease (AST and/or ALT >2,5x upper limit of normal range, or total bilirubin > 3,5 mg/dl).
- Serum creatinine >1,8mg/dl or creatinine clearance <30ml/min.
- Patients who cannot fully understand the treatment protocol or are unable to sign the informed consent.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Phase II Study of Efficacy, Tolerability and Safety of CD4-Specific T-cell Vaccine in HIV Infection
The hallmark of HIV infection and AIDS is the continuous attrition of CD4 T cells. One of the mechanisms that may account for the CD4 attrition , is autoimmunity against the CD4 T cells, caused by autologous immune cells. Vaccination against autoimmune reactive T cells has been successfully tried in animal models of autoimmune diseases and is now being tried in patients with Multiple Sclerosis. The purpose of the present study is to test this hypothesis in HIV infection. We will vaccinate HIV infected patients in whom specific autoimmune reactivity against CD4 is present , with their own CD4 reactive T cells. Following that, we shall study the patients and find out if the T cell vaccination caused a rise in CD4 T cell levels, and whether it influenced HIV viral load, as well as HIV and CD4 specific immunity.
Read the detailed description
The study will be based on forty HIV infected patients, receiving anti retroviral treatment (HAART), with CD4 levels between 150-350 and HIV plasma viral load < 5000, for at least 12 months and despite continuous anti-retroviral treatment. The patients will be randomly divided into two groups, one that will get the T cell vaccination, and the other that will serve as controls. The T cell vaccine will be prepared from autologous T cells that responded by specific proliferation to recombinant CD4, further expanded in vitro by IL-2, and then fixed by glutaraldehyde. Each vaccine portion will consist of 10,000 such cells suspended in saline and given subcutaneously every three months during the first year of the trial. The outcome measures will be CD4 levels, specific immunity to HIV antigens, immune activation profile and HIV plasma viral loads, determined sequentially during the 24 months of the trial. These outcome measures will be compared between the experimental and the control groups, to determine if this mode of treatment is effective in influencing CD4 levels as an additional mode of treatment during HIV infection.
- Conditions
- HIV Infections
- Being tested
- T cell vaccination
- Keywords
- HIV, CD4 T cell level, CD4 autoimmunity, Viral load, T cell vaccination, HIV Therapeutic Vaccine
- Medical subject headings
- HIV Infections
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
T cell vaccinationBiological
Approximately 10-20 million glutaraldehyde fixed CD4 responsive autologous T cells in 1-2 ml, per vaccine injection.
T cell vaccinationBiological
Approximately 10-20 million autologous CD4 reactive T cells per each vaccine injection
| Study group | Role | What they receive |
|---|---|---|
| Vaccination | Experimental | One arm of open label T cell vaccination in which all participants will receive the T cell vaccine Receives: Biological: T cell vaccination |
What is being measured
The primary outcome is the main question the study is designed to answer.
CD4 T cell levels
Measured: one year follow up
HIV plasma viral load
Measured: one year follow up
Clinical HIV infection
Measured: one year follow up
Secondary outcomes (3)
HIV specific immune responses
Measured: One year follow up
CD4 specific responses
Measured: One year follow up
Immune profile
Measured: One year follow up
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Dec 2006 (estimated)
- Study startNov 2006
- Primary completionNov 2008
- Study completionNov 2008
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for HIV InfectionsStudies of the same condition, open and under way.
- 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 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 40 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Soroka University Medical Center
- Sponsor type
- University, hospital or other
- Investigators
- Klaris Riesenberg, M.D., Study director, Soroka U Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00407836
- Sponsor's protocol ID
- sor444006ctil
- Status last verified
- Nov 2006
- First submitted
- 3 Dec 2006
- Last updated
- 2 Dec 2009
- Results posted
- No
- Data monitoring committee
- No
Publications
Abulafia-Lapid R, Bentwich Z, Keren-Zur Y, Cohen IR, Atlan H. T-cell vaccination against anti-CD4 autoimmunity in HIV-1 infected patients. J Clin Virol. 2004 Dec;31 Suppl 1:S48-54. doi: 10.1016/j.jcv.2004.09.017.
PubMed 15567094Abulafia-Lapid R, Mayan S, Bentwich Z, Keren-Zur Y, Avbramovitz Y, Cohen IR, Atlan H. T-cell vaccination against anti-CD4 autoimmunity in HIV-1 subtypes B and C-infected patients--an extended open trial. Vaccine. 2005 Mar 18;23(17-18):2149-53. doi: 10.1016/j.vaccine.2005.01.054.
PubMed 15755585
Study at a glance
From the registry record, last updated by the sponsor on 2 Dec 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Phase II Study of Efficacy, Tolerability and Safety of CD4-Specific T-cell Vaccine in HIV Infection
- ClinicalTrials.gov ID
- NCT00407836
- Acronym / sponsor ID
- sor444006ctil
- Conditions
- HIV Infections
- Keywords
- HIV, CD4 T cell level, CD4 autoimmunity, Viral load, T cell vaccination, HIV Therapeutic Vaccine
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 40 participants (estimated)
- Lead sponsor
- Soroka University Medical CenterUniversity, hospital or other
- Study start
- Nov 2006
- Primary completion
- Nov 2008 (actual)
- Study completion
- Nov 2008 (actual)
- First posted
- 5 Dec 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.
The hallmark of HIV infection and AIDS is the continuous attrition of CD4 T cells. One of the mechanisms that may account for the CD4 attrition , is autoimmunity against the CD4 T cells, caused by autologous immune cells. Vaccination against autoimmune reactive T cells has been successfully tried in animal models of autoimmune diseases and is now being tried in patients with Multiple Sclerosis. The purpose of the present study is to test this hypothesis in HIV infection. We will vaccinate HIV infected patients in whom specific autoimmune reactivity against CD4 is present , with their own CD4 reactive T cells. Following that, we shall study the patients and find out if the T cell vaccination caused a rise in CD4 T cell levels, and whether it influenced HIV viral load, as well as HIV and CD4 specific immunity.
Detailed description
The study will be based on forty HIV infected patients, receiving anti retroviral treatment (HAART), with CD4 levels between 150-350 and HIV plasma viral load < 5000, for at least 12 months and despite continuous anti-retroviral treatment. The patients will be randomly divided into two groups, one that will get the T cell vaccination, and the other that will serve as controls. The T cell vaccine will be prepared from autologous T cells that responded by specific proliferation to recombinant CD4, further expanded in vitro by IL-2, and then fixed by glutaraldehyde. Each vaccine portion will consist of 10,000 such cells suspended in saline and given subcutaneously every three months during the first year of the trial. The outcome measures will be CD4 levels, specific immunity to HIV antigens, immune activation profile and HIV plasma viral loads, determined sequentially during the 24 months of the trial. These outcome measures will be compared between the experimental and the control groups, to determine if this mode of treatment is effective in influencing CD4 levels as an additional mode of treatment during HIV infection.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Vaccination | Experimental | Biological: T cell vaccinationOne arm of open label T cell vaccination in which all participants will receive the T cell vaccine |
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- CD4 cell counts -from 150 to 450/mm3 and stable for at least 12 months, and treatment with HAART for at least 6 months.
- Positive cell proliferation assay to CD4 molecule
- Low HIV viral load (<400 - 5000 copies/ml) for at least 12 months
- No change of antiretroviral treatment for at least 6 months
- Signed informed consent
Key exclusion criteria (5 listed)
- Concomitant immunosuppressive or antineoplastic treatment as well as chronic systemic glucocorticoid therapy.
- Pregnancy and women without any efficacious contraception.
- Clinically relevant liver disease (AST and/or ALT >2,5x upper limit of normal range, or total bilirubin > 3,5 mg/dl).
- Serum creatinine >1,8mg/dl or creatinine clearance <30ml/min.
- Patients who cannot fully understand the treatment protocol or are unable to sign the informed consent.
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 |
|---|---|---|
| T cell vaccinationApproximately 10-20 million glutaraldehyde fixed CD4 responsive autologous T cells in 1-2 ml, per vaccine injection. | Biological | Vaccination |
| T cell vaccinationApproximately 10-20 million autologous CD4 reactive T cells per each vaccine injection | Biological | Vaccination |
Primary outcome
CD4 T cell levels
Time frame: one year follow up
HIV plasma viral load
Time frame: one year follow up
Clinical HIV infection
Time frame: one year follow up
3 secondary outcomes
HIV specific immune responses
Time frame: One year follow up
CD4 specific responses
Time frame: One year follow up
Immune profile
Time frame: One year follow up
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 2 Dec 2009.
- Results publication: PubMed 15567094Abulafia-Lapid R, Bentwich Z, Keren-Zur Y, Cohen IR, Atlan H. T-cell vaccination against anti-CD4 autoimmunity in HIV-1 infected patients. J Clin Virol. 2004 Dec;31 Suppl 1:S48-54. doi: 10.1016/j.jcv.2004.09.017.
- Results publication: PubMed 15755585Abulafia-Lapid R, Mayan S, Bentwich Z, Keren-Zur Y, Avbramovitz Y, Cohen IR, Atlan H. T-cell vaccination against anti-CD4 autoimmunity in HIV-1 subtypes B and C-infected patients--an extended open trial. Vaccine. 2005 Mar 18;23(17-18):2149-53. doi: 10.1016/j.vaccine.2005.01.054.
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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.
Klaris Riesenberg, M.D. study director
Soroka U Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing T cell vaccination in people with HIV Infections, run by Soroka University Medical Center at 1 site in Israel.
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 5 inclusion and 5 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 2 Dec 2009. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Israel. 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. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
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?
CD4 T cell levels (time frame: one year follow up). The study lists 3 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 NCT00407836, 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 2 Dec 2009.