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Immunogenicity Study of Vacc-4x Versus Placebo in Patients Infected With HIV

A Phase II, Randomized, Double-blind, Multicenter, Immunogenicity Study of Vacc-4x Versus Placebo in Patients Infected With HIV-1 Who Have Maintained an Adequate Response to ART

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00659789
Enrollment
137
Registered
2008-04-16
Start date
2008-08-31
Completion date
2011-06-30
Last updated
2017-02-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

HIV I Infection

Brief summary

Current management of HIV infection includes anti-retroviral therapy (ART). ART cannot cure the infection, making it a life-long treatment that requires sustained patient compliance and imposes significant individual and societal financial burdens on healthcare services. Furthermore, ART side effects often require medication that increases the inconveniences and financial burdens of HIV management. Of further concern is the emergence of viruses resistant to ART that can result in treatment failure. ART-free periods could provide substantial benefit. Vacc-4x is a peptide-based HIV immunotherapy that is proposed for prolongation of ART-free periods. The purpose of this study is to determine whether Vacc-4x immunotherapy can give safe ART-free period.

Detailed description

Current management of HIV infection includes anti-retroviral therapy (ART). ART cannot cure the infection, making it a life-long treatment that requires sustained patient compliance and imposes significant individual and societal financial burdens on healthcare services. Furthermore,ART side effects often require medication that increases the inconveniences and financial burdens of HIV management. Of further concern is the emergence of viruses resistant to ART that can result in treatment failure. ART-free periods could provide substantial benefit. Vacc-4x is a peptide-based HIV immunotherapy that is proposed for prolongation of ART-free periods. The purpose of this study is to determine whether Vacc-4x immunotherapy can give safe ART-free period.

Interventions

Vacc-4x is a peptide-based HIV immunotherapy administered intradermally. Vacc-4x peptides are reconstituted in sterile water.

DRUGSterile water

Sterile water is used in place of Vacc-4x and in place of Leukine

Sponsors

Bionor Immuno AS
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
No

Inclusion criteria

* Age 18-55 * HIV positive at least one year * Clinically stable on ART for at least six months * Documented viral load less than 50 copies/mL for the last six months * Documented prestudy CD4 cell count equal or more than 400x10exp6/L * Nadir CD4 cell count equal or more than 200x10exp6/L * Signed informed consent

Exclusion criteria

* Reported pre-study AIDS-defining illness within the previous year * Malignant disease * On chronic treatment with immuno-suppressive therapy * Unacceptable values of hematology and clinical chemistry parameters * Current chronic infection such as HCV and HBV or active tuberculosis * Pregnant or breastfeeding women * Not using safe contraceptive methods * Participation in other clinical trial * Incapability of compliance

Design outcomes

Primary

MeasureTime frame
Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.From Week 28 to Week 52

Secondary

MeasureTime frameDescription
Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsUp to week 52Brief summary of treatment emergent adverse events or related treatment emergent events and deaths. The intensity of adverse events was described according to the Division of AIDS table for grading severity of adult and pediatric adverse events, 2004.
ImmunogenicityWeek 1, week 18 and week 52Immunogenicity of Vacc-4x evaluated by DTH (Delayed-type Hypersensitivity) reaction. The number of participants showing induration and/or erythema
Effect of Vacc-4x on CD8 CountsWeeks 6,18,24,28,32,36,40,44,48,52.CD8 Count Over Time for subjects who stopped ART at Week 28 and remained off ART until Week 52
Time to Restart of ART for Vacc-4x Subjects Versus PlaceboBetween Week 28 to Week 52Kaplan-Meier Estimate of Time to restart ART (from time coming off ART)
Effects on Vacc-4x on HIV-1 RNAWeeks 24,28,32,36,40,44,48,52.

Countries

Germany, Italy, Spain, United Kingdom, United States

Participant flow

Recruitment details

The first subject was screened on 29 July 2008 and the first immunization was given on 22 August 2008. The last subject completed the study (to Week 52) on 22 June 2010. The last long-term follow-up visit was 07 June 2011.

Pre-assignment details

137 study participants were enrolled. One participant withdrew prior to randomization.

Participants by arm

ArmCount
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ART
Immunization with Vacc-4x (with Leukine®) at Weeks 1, 2, 3, and 4 followed by booster immunizations at Weeks 16 and 18.
92
Placebo Injections (Group II) While on ART
Placebo Vacc-4x (with placebo Leukine®) at Weeks 1, 2, 3, 4, 16 and 18.
43
Total135

Baseline characteristics

CharacteristicVacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTTotalPlacebo Injections (Group II) While on ART
Age, Customized
Age, Categorial
<=18 years
0 Participants0 Participants0 Participants
Age, Customized
Age, Categorial
>=55 years
0 Participants0 Participants0 Participants
Age, Customized
Age, Categorial
Between 15 and 55
92 Participants135 Participants43 Participants
CD4 nadir300 10^6 cells/L298 10^6 cells/L285 10^6 cells/L
Gender
Female
14 Participants19 Participants5 Participants
Gender
Male
78 Participants116 Participants38 Participants
Height175 cm175 cm175 cm
Pre-ART CD4339 10^6 cells/L357 10^6 cells/L370 10^6 cells/L
Pre-ART HIV-1 viral load94810 copies/mL75398 copies/mL25630 copies/mL
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants1 Participants1 Participants
Race (NIH/OMB)
Black or African American
4 Participants9 Participants5 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
88 Participants125 Participants37 Participants
Time since HIV diagnosis (days)3861 days4309 days4480 days
Total time on ART95.5 months108 months112 months

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
91 / 9340 / 42
serious
Total, serious adverse events
4 / 933 / 42

Outcome results

Primary

Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.

Time frame: From Week 28 to Week 52

Population: ITT Population

ArmMeasureGroupValue (NUMBER)
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTProportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects coming off ART at Week 2888 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTProportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects resuming ART between week 28 and 5230 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTProportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects not qualifying for ART interruption0 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTProportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects restarting ART at Week 52/termination12 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTProportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Number of subjects attending Week 28 visit88 participants
Placebo Injections (Group II) While on ART.Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects restarting ART at Week 52/termination7 participants
Placebo Injections (Group II) While on ART.Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Number of subjects attending Week 28 visit40 participants
Placebo Injections (Group II) While on ART.Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects coming off ART at Week 2838 participants
Placebo Injections (Group II) While on ART.Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects not qualifying for ART interruption1 participants
Placebo Injections (Group II) While on ART.Proportion of Subjects Who Require Resumption of ART Between the Interruption of ART at Week 28 and End of Study at Week 52.Subjects resuming ART between week 28 and 5211 participants
Secondary

Effect of Vacc-4x on CD8 Counts

CD8 Count Over Time for subjects who stopped ART at Week 28 and remained off ART until Week 52

Time frame: Weeks 6,18,24,28,32,36,40,44,48,52.

Population: Subject who stopped ART at week 28 and remained off ART until week 52

ArmMeasureGroupValue (MEDIAN)
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 6 (Vacc-4x n=54;placebo n=25)786.0 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 18 (Vacc-4x n=56; placebo n=25)853.5 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 24 (Vacc-4x n=56; placebo n=25)804.0 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 28 (Vacc-4x n=56; placebo n=25)820.5 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 32 (Vacc-4x n=56; placebo n=25)962.0 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 36 (Vacc-4x n=56; placebo n=25)1385.5 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 40 (Vacc-4x n=54; placebo n=25)1252.5 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 44 (Vacc-4x n=56; placebo n=25)1156.0 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 48 (Vacc-4x n=55; placebo n=24)1118.0 cells/µL
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffect of Vacc-4x on CD8 Countsweek 52 (completers) (Vacc-4x n=56;placebo n=25)1064.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 44 (Vacc-4x n=56; placebo n=25)1106.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 6 (Vacc-4x n=54;placebo n=25)865.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 36 (Vacc-4x n=56; placebo n=25)1416.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 18 (Vacc-4x n=56; placebo n=25)897.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 52 (completers) (Vacc-4x n=56;placebo n=25)1047.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 24 (Vacc-4x n=56; placebo n=25)771.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 40 (Vacc-4x n=54; placebo n=25)1253.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 28 (Vacc-4x n=56; placebo n=25)879.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 48 (Vacc-4x n=55; placebo n=24)1217.0 cells/µL
Placebo Injections (Group II) While on ART.Effect of Vacc-4x on CD8 Countsweek 32 (Vacc-4x n=56; placebo n=25)1161.0 cells/µL
Secondary

Effects on Vacc-4x on HIV-1 RNA

Time frame: Weeks 24,28,32,36,40,44,48,52.

ArmMeasureGroupValue (MEAN)Dispersion
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 24 (Vacc-4x n=90; placebo n=41)629.6 copies/mLStandard Deviation 5807.26
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 28 (Vacc-4x n=89; placebo n=40)1351.4 copies/mLStandard Deviation 5710.99
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 32 (Vacc-4x n=88; placebo n=38)192115.0 copies/mLStandard Deviation 361003.4
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 36 (Vacc-4x n=81; placebo n=35)89134.8 copies/mLStandard Deviation 165945.62
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 40 (Vacc-4x n=71; placebo n=32)72705.0 copies/mLStandard Deviation 143582.93
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 44 (Vacc-4x n=63; placebo n=27)44969.7 copies/mLStandard Deviation 65798.22
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 48 (Vacc-4x n=59; placebo n=25)48848.2 copies/mLStandard Deviation 90232.17
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTEffects on Vacc-4x on HIV-1 RNAweek 52 (Vacc-4x n=56; placebo n=24)35219.6 copies/mLStandard Deviation 42181.85
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 52 (Vacc-4x n=56; placebo n=24)67684.0 copies/mLStandard Deviation 67869.61
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 24 (Vacc-4x n=90; placebo n=41)9.2 copies/mLStandard Deviation 22.85
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 40 (Vacc-4x n=71; placebo n=32)76127.8 copies/mLStandard Deviation 81891.91
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 28 (Vacc-4x n=89; placebo n=40)1628.5 copies/mLStandard Deviation 10131.81
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 48 (Vacc-4x n=59; placebo n=25)77219.4 copies/mLStandard Deviation 70851.98
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 32 (Vacc-4x n=88; placebo n=38)205605.2 copies/mLStandard Deviation 383020.31
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 44 (Vacc-4x n=63; placebo n=27)66203.3 copies/mLStandard Deviation 72099.23
Placebo Injections (Group II) While on ART.Effects on Vacc-4x on HIV-1 RNAweek 36 (Vacc-4x n=81; placebo n=35)89211.9 copies/mLStandard Deviation 97983.28
Secondary

Immunogenicity

Immunogenicity of Vacc-4x evaluated by DTH (Delayed-type Hypersensitivity) reaction. The number of participants showing induration and/or erythema

Time frame: Week 1, week 18 and week 52

Population: ITT Population

ArmMeasureGroupValue (NUMBER)
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityErythema week 18 (Vacc-4x n=88; placebo n=41)40 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityErythema week 52 (Vacc-4x n=78;placebo n=36)34 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityErythema week 1 (Vacc-4x n=92;placebo n=43)3 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityInduration week 1 (Vacc-4x n=92; placebo n=433 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityInduration week 18 (Vacc-4x n=88; placebo n=41)27 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityInduration week 52 (Vacc-4x n=78; placebo n=36)26 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityInduration week 52(LOCF) Vacc-4x n=92;placebo n=4330 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTImmunogenicityErythema week 52 (LOCF) Vacc-4x n=92;placebo n=4340 participants
Placebo Injections (Group II) While on ART.ImmunogenicityErythema week 52 (LOCF) Vacc-4x n=92;placebo n=430 participants
Placebo Injections (Group II) While on ART.ImmunogenicityErythema week 18 (Vacc-4x n=88; placebo n=41)0 participants
Placebo Injections (Group II) While on ART.ImmunogenicityInduration week 18 (Vacc-4x n=88; placebo n=41)0 participants
Placebo Injections (Group II) While on ART.ImmunogenicityErythema week 52 (Vacc-4x n=78;placebo n=36)0 participants
Placebo Injections (Group II) While on ART.ImmunogenicityInduration week 52(LOCF) Vacc-4x n=92;placebo n=430 participants
Placebo Injections (Group II) While on ART.ImmunogenicityErythema week 1 (Vacc-4x n=92;placebo n=43)1 participants
Placebo Injections (Group II) While on ART.ImmunogenicityInduration week 52 (Vacc-4x n=78; placebo n=36)0 participants
Placebo Injections (Group II) While on ART.ImmunogenicityInduration week 1 (Vacc-4x n=92; placebo n=431 participants
Secondary

Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and Deaths

Brief summary of treatment emergent adverse events or related treatment emergent events and deaths. The intensity of adverse events was described according to the Division of AIDS table for grading severity of adult and pediatric adverse events, 2004.

Time frame: Up to week 52

Population: Safety Population

ArmMeasureGroupValue (NUMBER)
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Life threatening1 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Severe4 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Mild27 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Life threatening0 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE up to week 52/early termination81 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny TESAE up to week 52/early termination4 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Severe9 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny related TESAE up to week 52/early termination1 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Mild40 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny TEAE leading to treatment discontinuation2 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Moderate54 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTreatment-related TEAE leading to discontinuation2 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Moderate37 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsDeaths0 participants
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTNumber of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny TEAE up to week 52/early termination91 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsDeaths1 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny TEAE up to week 52/early termination40 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Mild13 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Moderate21 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Severe6 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTEAE - Life threatening0 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE up to week 52/early termination24 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Mild19 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Moderate5 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Severe0 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsRelated TEAE - Life threatening0 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny TESAE up to week 52/early termination3 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny related TESAE up to week 52/early termination0 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsAny TEAE leading to treatment discontinuation0 participants
Placebo Injections (Group II) While on ART.Number of Participants With Any Treatment Emergent Adverse Event, Related Treatment Emergent Adverse Events and DeathsTreatment-related TEAE leading to discontinuation0 participants
Secondary

Time to Restart of ART for Vacc-4x Subjects Versus Placebo

Kaplan-Meier Estimate of Time to restart ART (from time coming off ART)

Time frame: Between Week 28 to Week 52

Population: ITT Population

ArmMeasureValue (MEAN)Dispersion
Vacc-4x Immunization (Adjuvant: GM-CSF) (Group I) While on ARTTime to Restart of ART for Vacc-4x Subjects Versus Placebo141.8 daysStandard Deviation 47.4
Placebo Injections (Group II) While on ART.Time to Restart of ART for Vacc-4x Subjects Versus Placebo133.5 daysStandard Deviation 57.27

Source: ClinicalTrials.gov · Data processed: Mar 21, 2026