ClinicalTrials.gg
CompletedNCT03391375Updated Feb 7, 2019

Evaluation of the Effect of Late Boost on HIV-uninfected Vaccines From EV06 Trial

A Phase 1 interventional study of DNA-HIV-PT123 & AIDSVAX B/E in HIV/AIDS, sponsored by EuroVacc Foundation. Completed at 1 site in Uganda. Open to participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-02-07.

Sponsored by EuroVacc Foundation · Phase 1, Interventional, and Prevention

From the registry’s dates

  • Registered 8 months after the study started (first participant enrolled Mar 2017, registered Dec 2017).

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Phase
Phase 1
Study type
Interventional
Enrollment
49
Allocation
Not applicable
Ages
18 Years to 45 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 121 studies in Acquired Immunodeficiency Syndrome with a site in Uganda — 17 open to participants now, 24 under way, 6 of them phase 3. Acquired Immunodeficiency Syndrome · Uganda.

Enrollment
95th of 103
49 · median 380
Started
2017
with 4 others
Phase 1
4 of 121
1 open now
Registered
62nd of 121
by date

Among the 121 studies in Acquired Immunodeficiency Syndrome with a site in Uganda, this one is the 95th largest by enrollment of the 103 interventional ones that give a count, is one of 5 that started in 2017, is one of 4 in phase 1, and was the 62nd registered.

Acquired Immunodeficiency Syndrome

3,037 studies on the registry are indexed under Acquired Immunodeficiency Syndrome; 307 are open to participants now.

Browse Acquired Immunodeficiency Syndrome studies →

Open to participants now

17 of the 121 studies in Acquired Immunodeficiency Syndrome with a site in Uganda are open now. Recruiting first, the newest first:

12 more — sign in →

All 17 open studies →

A study can be open while its sites in Uganda have not opened yet or have stopped. Only those recruiting at a site in Uganda →

Who these studies take

Of the 198 Acquired Immunodeficiency Syndrome studies recruiting now, 118 (60%) set no upper age limit and 67 (34%) stop at 75 or younger; 43 take children under 18; 68 take healthy volunteers.

This study: 18 Years to 45 Years · all sexes · healthy volunteers too.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 121 studies in Acquired Immunodeficiency Syndrome with a site in Uganda, or all of them as a file.
02

Study summary

EV07 is an open label phase I clinical trial to evaluate the effect of late boost on HIV-uninfected vaccinees from EV06 trial.

The outcome of the EV06 trial has shown that the vaccine regimen is safe and well tolerated. Preliminary antibody immunogenicity analysis has demonstrated that the DNA/gp120 protein vaccine regimen induced strong gp120, gp140 and V1V2 region-focused binding IgG and neutralizing antibody responses. There is also preliminary evidence that S. mansoni infection may modulate antibody responses induced by vaccination1.

Based on these preliminary immunogenicity results of the EV06 study, a study with an additional boost with DNA-HIV-PT123 and AIDSVAX®B/E (Late Boost) is warranted in order to better investigate and understand the effects of the late boost on the response rate, magnitude and durability of vaccine induced immune responses.

The primary objective of EV07 is to evaluate the ability of the late boost combination of DNA-HIV-PT123 and AIDSVAX® B/E to enhance the pre-existing vaccine induced antibody responses.

03

Conditions studied

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Participated in the EV06 trial and received all three vaccinations from EV06 trial
  2. uninfected adults, as confirmed by a medical history, physical exam, and laboratory tests during screening
  3. Able and willing to provide written prior to screening
  4. Aged at least 18 at the time of consent
  5. Able and willing to complete screening (about 1 month) and available for the planned follow-up period (6 months)
  6. Willing to undergo HIV testing, risk reduction counselling and receive HIV test results
  7. If female of (unless sterilised), willing to use a non-barrier method from screening through the end of the study. Acceptable contraceptive methods include hormonal contraceptives (injection, transdermal patch, or implant) and intrauterine device (IUD).
  8. If male, willing to use male condoms and not make a woman pregnant from enrolment through the end of the study.
  9. Willing to provide blood, urine and stool samples for laboratory examination

Exclusion criteria

Exclusion Criteria:

  1. -1/2 infection
  2. Symptomatic and asymptomatic malaria infection (presence of malaria parasites on thick blood smear)
  3. acute or chronic illness at the time of randomization.
  4. Any clinically relevant abnormality on history or examination
  5. Use of medication (other than inhaled or topical immunosuppressants)
  6. Receipt of immunoglobulin within past 60 days
  7. Abnormal laboratory values as specified below from blood collected within 42 days prior to randomization:

    1. Hematology

      • \<9.0 g/dL or \<5.59 mmol/L
      • (ANC): \< 1000/mm3 or \< 1.0 x 109/L
      • Absolute Lymphocyte Count (ALC): ≤ 500/mm3 or ≤ 0.5 x 109/L
      • : ≤ 90,000 ≥ 550,000/mm3 or ≤ 90 x 109 ≥ 550 x 109/L
    2. Chemistry

      • Creatinine: > 1. 1 x
      • : >2.6 x ULN
      • ALT: >2.6 x ULN
    3. Urinalysis: abnormal dipstick confirmed by microscopy

      • Protein 2+ or more
      • Blood 2+ or more (not due to menses)
  8. History or evidence of disease.
  9. Positive for surface antigen (HbsAg), positive for antibodies to virus (HCV) or active syphilis.
  10. Receipt of blood or blood products within the previous 6 months
  11. History of severe allergic reactions to any substance requiring hospitalization or emergency medical care (e.g. Steven-Johnson syndrome, bronchospasm or hypotension)
  12. Prior or current participation in another agent trial except to the EV06 trial
  13. Current anti-tuberculosis (TB) prophylaxis or therapy
  14. If female, currently pregnant (positive serum or urine pregnancy test), planning to get pregnant in the next 9 months or lactating
  15. History or evidence of any systemic disease or any acute or chronic illness that, in the opinion of the investigator, may compromise the volunteer's safety or interfere with the evaluation of the safety or immunogenicity of the vaccine

Volunteers will be enrolled regardless of schistosomiasis infection status. Volunteers with high S. mansoni egg count of >2000 eggs per gram of stool at screening will be treated before vaccination. Volunteers with low S mansoni egg count of \<2000 eggs per gram of stool at screening will be asked to forgo treatment until after completion of week 24 visit of the trial. Volunteers with other helminth infections at screening will also receive treatment before vaccination.

Terms in these criteria, in plain language(15)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1
Primary purpose
Prevention
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
49 participants (actual)

Study arms

  • Experimental
    DNA-Protein

    Co-administration of DNA-HIV-PT123 and AIDSVAX B/E at week 0, 4 and 24

    Biological: DNA-HIV-PT123 & AIDSVAX B/E

Interventions

  • BiologicalDNA-HIV-PT123 & AIDSVAX B/E

    DNA-HIV-PT123 encodes clade C ZM96 Gag and gp140, CN54 Pol-Nef; AIDSVAX®B/E is a subtype B (MN) and subtype E (A244) HIV gp120 glycoprotein adsorbed onto aluminium hydroxide gel adjuvant

06

What researchers measure

Primary outcomes

  1. Vaccine induced binding antibody responses

    HIV-specific Env binding Antibody response

    Time frame: week 24

  2. Vaccine induced neutralizing antibody responses

    Neutralizing antibody responses against tier 1 and tier 2 HIV-1 isolates

    Time frame: week 24

  3. Safety and tolerability of the late boost vaccination

    Proportion of volunteers with local and systemic reactogenicity events

    Time frame: 7 days follow-up period after the late boost

  4. Safety and tolerability of the late boost vaccination

    Proportion of volunteers with adverse events

    Time frame: 4-week follow-up period after the late boost

  5. Safety and tolerability of the late boost

    Proportion of volunteers with serious adverse events

    Time frame: Up to 24 weeks

Secondary outcomes

  1. Ability of the late boost combination of DNA-HIV-PT123 and AIDSVAX® B/E to enhance the pre-existing vaccine induced T-cell responses

    HIV-specific CD4 and CD8 T cell responses

    Time frame: Week 2, 12 and 24

07

Study locations

1 site
  • Uganda Virus Research Institute - International AIDS Vaccine Initiative HIV Vaccine Program (UVRI-IAVI)
    Entebbe, Uganda
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Mar 2017 to primary completion in Jan 2018, 9 months.

Of 63 non-industry phase 1 interventional studies under Acquired Immunodeficiency Syndrome, half reached primary completion within 23 months of starting (the median), counting those still running; a quarter within 15 and three quarters within 39. This study's 9 months is below that.

Counting every sponsor, half of 139 studies reached it within 14 months; a quarter within 4 and three quarters within 28.

How these figures are worked out, and which studies are left out of them.

Registered
Dec 11, 2017
First posted
Jan 5, 2018
StartActual
Mar 15, 2017
Primary completionActual
Jan 1, 2018
CompletionActual
Jul 31, 2018
Last update
Feb 7, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 7, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03391375
Lead sponsor
EuroVacc Foundation
Collaborators
MRC/UVRI and LSHTM Uganda Research Unit, International AIDS Vaccine Initiative, Centre Hospitalier Universitaire Vaudois
Responsible party
Sponsor
First posted
Jan 5, 2018
Start date
Mar 15, 2017
Primary completion
Jan 1, 2018
Completion
Jul 31, 2018
Last update
Feb 7, 2019

Study contacts

Pontiano Kaleebu
principal investigator · MRC/UVRI and LSHTM Uganda Research Unit

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2017. You cannot join it, but the record below documents what was studied.

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