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OpenTrials
Completed

NCT Number: NCT02935686

A Safety, Tolerability and Immunogenicity Study of 2 Different Regimens of Tetravalent Ad26.Mos4.HIV Prime Followed by Boost With Tetravalent Ad26.Mos4.HIV Along With Either Clade C gp140 Plus Adjuvant OR With a Combination of Mosaic and Clade C gp140 Plus Adjuvant in Healthy HIV Uninfected Adults

The primary purpose of this study is to assess safety/tolerability of the different vaccine regimens and of a late boost vaccination; and to assess envelope (Env)-binding antibody (Ab) responses of the 2 different vaccine regimens.

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Key information

Conditions

Healthy

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1 / Phase 2

Primary location

Walter Reed Project Clinical Research Center, Kericho, Kenya

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About this study

This is a randomized (study medication assigned by chance), double-blind (neither physician nor participant knows the treatment received), placebo-controlled (placebo is an inactive substance that is compared with a drug to test whether the drug has a real effect in a clinical trial), parallel-group (each treatment group will be treated at the same time), multicenter (more than one clinical site) study in healthy human immunodeficiency virus (HIV)-uninfected adults. The main study will be conducted in 3 phases: a 6-week screening period; a 48-week vaccination period; and a follow-up period to the final main study visit at Week 72. A Long-term Extension (LTE) phase (approximately 3 years after Week 72) will be performed for participants randomized to Group 1 or Group 2, who receive all 4 vaccinations and are negative for HIV infection at Week 72. The approximate duration of the study will be approximately 78 weeks for participants not participating in the LTE phase and approximately 222 weeks for participants participating in the LTE phase but not receiving a late boost vaccination and approximately 246 (12-month follow-up) or 294 (24-month follow-up) weeks for participants receiving a late boost vaccination. Participants safety will be monitored throughout the study.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Participant must be healthy on the basis of medical history, physical examination, and vital signs measurement performed at screening
  • Participants are negative for human immunodeficiency virus (HIV) infection at screening
  • Participants are amenable to HIV-risk reduction counseling and committed to maintaining behavior consistent with low risk of HIV exposure through the last required protocol clinic visit
  • All female participants of childbearing potential must have a negative serum (beta-human chorionic gonadotropin [beta-hCG]) at the screening visit, and a negative urine pregnancy test pre-dose on Day 1
  • Participants are willing/able to adhere to the prohibitions and restrictions specified in the protocol and study procedures
  • Participant must be enrolled in the LTE phase to receive the late boost vaccination

Exclusion criteria

  • Has chronic hepatitis B (measured by hepatitis B surface antigen test) or active hepatitis C (measured by hepatitis C virus [HCV] Ab test; if positive, HCV ribonucleic acid [RNA] polymerase chain reaction (PCR) test will be used to confirm active versus past HCV infection), active syphilis infection, chlamydia, gonorrhea, or trichomonas
  • In the 12 months prior to randomization, participant has a history of newly acquired herpes simplex virus type 2 (HSV-2), syphilis, gonorrhea, non-gonococcal urethritis, chlamydia, pelvic inflammatory disease, trichomonas, mucopurulent cervicitis, epididymitis, proctitis, lymphogranulomavenereum, chancroid, or hepatitis B
  • Participant has had major surgery (eg, requiring general anesthesia) within the 4 weeks before screening, or will not have fully recovered from surgery, or has surgery planned through the course of the study
  • Participant has had a thyroidectomy or active thyroid disease requiring medication during the last 12 months (not excluded: a stable thyroid supplementation)
  • Current or past drug/alcohol use that investigator assesses poses any more than a remotely increased risk of the ability of the participant to comply with the protocol requirements
  • Has been in receipt of any licensed vaccine within 14 days prior to the first dose of study vaccine or placebo, plans to receive within 14 days after the first study vaccination, or plans to receive within 14 days before or after the second, third or fourth vaccination
  • Is a recipient of a prophylactic or therapeutic HIV vaccine candidate at any time, or a recipient of other experimental vaccine(s) within the last 12 months prior to the Day 1 visit (Vaccination 1). For participants who received an experimental vaccine (except HIV vaccine) more than 12 months prior to the Day 1 visit (Vaccination 1), documentation of the identity of the experimental vaccine must be provided to the sponsor, who will determine eligibility on a case-by-case basis

Treatment and study plan

Ad26.Mos4.HIV

Biological

Ad26.Mos4.HIV at a dose of 5*10^10 viral particles (vp), administered intramuscularly.

Clade C gp140 plus adjuvant

Biological

Clade C gp140 vaccine containing 250 mcg of total protein, mixed with aluminum phosphate adjuvant, per 0.5 milliliter (mL) injection administered intramuscularly.

Clade C gp140/Mosaic gp140 plus adjuvant

Biological

Clade C gp140 and Mosaic gp140 (each 125 mcg of total protein) mixed with aluminum phosphate adjuvant, per 0.5 milliliter (mL) injection, administered intramuscularly.

Placebo

Other

Placebo Containing 0.9 percent normal saline, administered intramuscularly.

gp140 HIV Bivalent Vaccine

Biological

gp140 HIV Bivalent Vaccine is adjuvanted protein co-formulation with a dosage strength of 80 mcg Clade C protein, 75 mcg Mosaic protein and 425 mcg aluminum (as aluminum phosphate adjuvant).

Primary outcomes

  1. Main Study: Number of Participants With Solicited Local and Systemic Adverse Events (AEs) for 7 Days Post-vaccination 1

    Time frame: Up to 7 days post-vaccination 1 on Day 1 (up to Day 8)

    Number of participants with solicited local and systemic AEs for 7 days post-vaccination 1 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Solicited AEs were precisely local and systemic events for which the participant is specifically questioned and symptoms of which were noted by participant in their diary. Solicited local AEs included injection site pain/tenderness, erythema, and swelling/induration at the study vaccine injection site. Solicited systemic AEs included fever (temperature measurement), fatigue, headache, nausea, myalgia, and chills.

  2. Main Study: Number of Participants With Solicited Local and Systemic Adverse Events (AEs) for 7 Days Post-vaccination 2

    Time frame: Up to 7 days post vaccination 2 (up to any day from Day 78 to Day 113) (vaccination 2 ranged from Day 78 to 106)

    Number of participants with solicited local and systemic AEs for 7 days post-vaccination 2 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Solicited AEs were precisely local and systemic events for which the participant is specifically questioned and symptoms of which were noted by participant in their diary. Solicited local AEs included injection site pain/tenderness, erythema, and swelling/induration at the study vaccine injection site. Solicited systemic AEs included fever (temperature measurement), fatigue, headache, nausea, myalgia, and chills.

  3. Main Study: Number of Participants With Solicited Local and Systemic Adverse Events (AEs) for 7 Days Post-vaccination 3

    Time frame: Up to 7 days post vaccination 3 (up to any day from Day 162 to Day 197) (vaccination 3 ranged from Day 162 to 190)

    Number of participants with solicited local and systemic AEs for 7 days post-vaccination 3 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Solicited AEs were precisely local and systemic events for which the participant is specifically questioned and symptoms of which were noted by participant in their diary. Solicited local AEs included injection site pain/tenderness, erythema, and swelling/induration at the study vaccine injection site. Solicited systemic AEs included fever (temperature measurement), fatigue, headache, nausea, myalgia, and chills.

  4. Main Study: Number of Participants With Solicited Local and Systemic Adverse Events (AEs) for 7 Days Post-vaccination 4

    Time frame: Up to 7 days post vaccination 4 (up to any day from Day 330 to Day 365) (vaccination 4 ranged from Day 330 to 358)

    Number of participants with solicited local and systemic AEs for 7 days post-vaccination 4 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Solicited AEs were precisely local and systemic events for which the participant is specifically questioned and symptoms of which were noted by participant in their diary. Solicited local AEs included injection site pain/tenderness, erythema, and swelling/induration at the study vaccine injection site. Solicited systemic AEs included fever (temperature measurement), fatigue, headache, nausea, myalgia, and chills.

  5. Main Study: Number of Participants With Unsolicited Adverse Events (AEs) for 28 Days Post-vaccination 1

    Time frame: Up to 28 days post-vaccination 1 on Day 1 (Up to Day 29)

    Number of participants with unsolicited AEs for 28 days post-vaccination 1 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  6. Main Study: Number of Participants With Unsolicited Adverse Events (AEs) for 28 Days Post-vaccination 2

    Time frame: Up to 28 days post vaccination 2 (up to any day from Day 78 to Day 134) (vaccination 2 ranged from Day 78 to 106)

    Number of participants with unsolicited AEs for 28 days post-vaccination 2 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  7. Main Study: Number of Participants With Unsolicited Adverse Events (AEs) for 28 Days Post-vaccination 3

    Time frame: Up to 28 days post vaccination 3 (up to any day from Day 162 to Day 218) (vaccination 3 ranged from Day 162 to 190)

    Number of participants with unsolicited AEs for 28 days post-vaccination 3 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  8. Main Study: Number of Participants With Unsolicited Adverse Events (AEs) for 28 Days Post-vaccination 4

    Time frame: Up to 28 days post vaccination 4 (up to any day from Day 330 to Day 358) (vaccination 4 ranged from Day 330 to 358)

    Number of participants with unsolicited AEs for 28 days post-vaccination 4 were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  9. Main Study: Number of Participants Who Discontinued Study Vaccination Due to AEs

    Time frame: From Baseline (Day 1) up to Week 72

    Number of participants who discontinued study vaccination due to AEs were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment.

  10. Main Study: Number of Participants With Serious Adverse Events (SAEs)

    Time frame: From Baseline (Day 1) up to Week 72

    Number of participants with SAEs were reported. An AE was any untoward medical occurrence in a clinical study administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the study vaccine. An SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly/birth defect; suspected transmission of any infectious agent via a medicinal product or medically important.

  11. Main Study and LTE Study: Number of Participants With Adverse Events of Special Interest (AESIs)

    Time frame: From Baseline (Day 1) up to Week 216

    Number of participants with adverse events of special interest (AESIs) were reported. As planned, confirmed HIV infection was the only event assessed as an AESI. AESIs (including potential AESIs) are significant AEs that are judged to be of special interest because of clinical importance, known or suspected class effects, or based on nonclinical signals. AESIs (including potential AESIs) must be reported to the sponsor within 24 hours of awareness irrespective of seriousness (that is, serious and nonserious AEs) or causality.

  12. Late-boost (LB) Vaccination Phase: Number of Participants Who Discontinued Study Due to AEs

    Time frame: From Week 188 up to end of study (Week 288)

    Number of participants who discontinued study due to AEs were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment.

  13. Late-boost (LB) Vaccination Phase: Number of Participants With Solicited Local and Systemic Adverse Events (AEs) for 7 Days Post Late Boost Vaccination

    Time frame: Up to 7 days post late boost vaccination (up to any day from Day 1317 to Day 1464) (late boost vaccination ranged from Day 1317 to 1457)

    Number of participants with solicited local and systemic AEs for 7 days post late boost vaccination were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Solicited AEs were precisely local and systemic events for which the participant is specifically questioned and symptoms of which were noted by participant in their diary. Solicited local AEs included injection site pain/tenderness, erythema, and swelling/induration at the study vaccine injection site. Solicited systemic AEs included fever (temperature measurement), fatigue, headache, nausea, myalgia, and chills.

  14. Late-boost (LB) Vaccination Phase: Number of Participants With Unsolicited Adverse Events (AEs) for 28 Days Post Late Boost Vaccination

    Time frame: Up to 28 days post late boost vaccination (up to any day from Day 1317 to Day 1485) (late boost vaccination ranged from Day 1317 to 1457)

    Number of participants with unsolicited AEs for 28 post late boost vaccination were reported. An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the treatment. Unsolicited AEs were all AEs for which the participant is not specifically questioned in the participant diary.

  15. Late-boost (LB) Vaccination Phase: Number of Participants With Serious Adverse Events (SAEs)

    Time frame: From Week 188 up to end of study (Week 288)

    Number of participants with SAEs were reported. An AE was any untoward medical occurrence in a clinical study administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the study vaccine. An SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly/birth defect; suspected transmission of any infectious agent via a medicinal product or medically important.

  16. Late-boost (LB) Vaccination Phase: Number of Participants With AESIs of HIV Infection Up to End of Study

    Time frame: From Week 188 up to end of study (Week 288)

    Number of participants with AESIs up to the end of the study were reported. An AE was any untoward medical occurrence in a clinical study administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the study vaccine. AESIs (including potential AESIs) are significant AEs that are judged to be of special interest because of clinical importance, known or suspected class effects, or based on nonclinical signals. AESIs (including potential AESIs) must be reported to the sponsor within 24 hours of awareness irrespective of seriousness (i.e, serious and nonserious AEs) or causality. Confirmed HIV infection was considered an AESI.

  17. Late-boost (LB) Vaccination Phase: Number of Participants With AESIs of Thrombosis With Thrombocytopenia Syndrome (TTS)

    Time frame: Up to 6 months post late boost vaccination (up to any day from Day 1317 to Day 1639) (late boost vaccination ranged from Day 1317 to 1457)

    Number of participants with AESIs of TTS were reported. An AE was any untoward medical occurrence in a clinical study administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the study vaccine. AESIs are significant AEs that are judged to be of special interest because of clinical importance, known or suspected class effects, or based on nonclinical signals. AESIs must be reported to the sponsor within 24 hours of awareness irrespective of seriousness (i.e, serious and nonserious AEs) or causality. Thrombotic events and/or thrombocytopenia were considered as AESIs.

  18. Main Study: Geometric Mean of Envelope (Env) Clade A (92UG037.1), B (1990a), C (Con C), (C97ZA.012), Mos 1 Specific Binding Antibodies (Abs) Responses As Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 28

    Time frame: Week 28

    Geometric mean of Env Clade A (92UG037.1), B (1990a), C (Con C), (C97ZA.012), Mos 1 specific binding Abs responses were assessed using ELISA.

  19. Main Study: Geometric Mean of Envelope (Env) Clade A (92UG037.1), B (1990a), C (Con C), (C97ZA.012), Mos 1 Specific Binding Antibodies (Abs) Responses As Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 52

    Time frame: Week 52

    Geometric mean of Env Clade A (92UG037.1), B (1990a), C (Con C), (C97ZA.012), Mos 1 specific binding Abs responses were assessed using ELISA.

  20. Main Study: Geometric Mean of Envelope (Env) Clade A (92UG037.1) B (1990a), C (Con C), (C97ZA.012), Mos 1 Specific Binding Antibodies (Abs) Responses As Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 72

    Time frame: Week 72

    Geometric mean of Env Clade A (92UG037.1) B (1990a), C (Con C), (C97ZA.012), Mos 1 specific binding Abs responses were assessed using ELISA.

  21. Main Study: Percentage of Responders for Envelope (Env)-Specific Binding Antibody Titers at Week 28

    Time frame: Week 28

    Percentage of responders for envelop (Env) Clade B (SC42261), Clade C (CH505TF), Clade A (9004S), Clade B (RHPA), Clade B (WITO), Clade C (1086C), Clade C (BF1266), CladeAE (conAE), Clade M(Con S)-specific binding antibody titers assessed using enzyme-linked immunosorbent assay (ELISA) were reported. The response was defined as post-baseline value greater than (>) lower limit of quantification (LLOQ) if baseline value less than (<) LLOQ or missing or defined as post-baseline value >3-fold increase from baseline if baseline value greater than or equal to (>=) LLOQ.

  22. Main Study: Percentage of Responders for Envelope (Env)-Specific Binding Antibody Titers at Week 52

    Time frame: Week 52

    Percentage of responders for envelop (Env) Clade B (SC42261), Clade C (CH505TF), Clade A (9004S), Clade B (RHPA), Clade B (WITO), Clade C (1086C), Clade C (BF1266), CladeAE (conAE), Clade M(Con S)-specific binding antibody titers assessed using enzyme-linked immunosorbent assay (ELISA) were reported. The response was defined as post-baseline value greater than (>) lower limit of quantification (LLOQ) if baseline value less than (<) LLOQ or missing or defined as post-baseline value >3-fold increase from baseline if baseline value greater than or equal to (>=) LLOQ.

  23. Main Study: Percentage of Responders for Envelope (Env)-Specific Binding Antibody Titers at Week 72

    Time frame: Week 72

    Percentage of responders for envelop (Env) Clade B (SC42261), Clade C (CH505TF), Clade A (9004S), Clade B (RHPA), Clade B (WITO), Clade C (1086C), Clade C (BF1266), CladeAE (conAE), Clade M(Con S)-specific binding antibody titers assessed using enzyme-linked immunosorbent assay (ELISA) were reported. The response was defined as post-baseline value greater than (>) lower limit of quantification (LLOQ) if baseline value less than (<) LLOQ or missing or defined as post-baseline value >3-fold increase from baseline if baseline value greater than or equal to (>=) LLOQ.

  24. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 192

    Time frame: Week 192

    Geometric mean of Env Mos 1 specific binding Abs response at Week 192 were assessed using ELISA.

  25. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 193

    Time frame: Week 193

    Geometric Mean of Env Mos 1 specific binding Abs response at Week 193 were assessed using ELISA.

  26. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 196

    Time frame: Week 196

    Geometric mean of Env Mos 1 specific binding Abs response at Week 196 were assessed using ELISA.

  27. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 204

    Time frame: Week 204

    Geometric mean of Env Mos 1 specific binding Abs response at Week 204 were assessed using ELISA.

  28. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 216

    Time frame: Week 216

    Geometric mean of Env Mos 1 specific binding Abs response at Week 216 were assessed using ELISA.

  29. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 240

    Time frame: Week 240

    Geometric mean of Env Mos 1 specific binding Abs response at Week 240 were assessed using ELISA.

  30. Late-boost (LB) Vaccination Phase: Geometric Mean of Envelope (Env) Mos 1 Specific Binding Antibodies (Abs) Response as Assessed Using Enzyme-linked Immunosorbent Assay (ELISA) at Week 288

    Time frame: Week 288

    Geometric mean of Env Mos 1 specific binding Abs response at Week 288 were assessed using ELISA.

Secondary outcomes

  1. Main Study: Percentage of Responders of Env-Specific Neutralizing Antibody (nAbs) for Tier 1 Viruses

    Time frame: Weeks 28, 52, and 72 (only for Clade C [MW965])

    Percentage of responders of Env-specific nAbs for tier 1 viruses were reported. Viruses with a Tier 1 neutralization phenotype: Clade C: MW965 and 97ZA012, ZM233M, CE703010010, 2759058, ZM215F, SO431, CE704810053 were used. The response was defined as post-baseline value >LLOQ.

  2. Long-term Extension (LTE) Phase: Percentage of Responders of Env-Specific Neutralizing Antibody (nAbs) for Tier 1 Viruses

    Time frame: From Week 72 to Week 216

    Percentage of responders of Env-specific nAbs for tier 1 viruses were planned to be reported.

  3. Late-boost (LB) Vaccination Phase: Percentage of Responders of Env-Specific Neutralizing Antibody (nAbs) for Tier 1 Viruses

    Time frame: From Week 188 up to end of study (Week 288)

    Percentage of responders of Env-specific nAbs for tier 1 viruses were planned to be reported.

  4. Main Study: Percentage of Responders for Env-Specific Functional Antibody Response (Env ADCP gp140)

    Time frame: Weeks 28, 52, and 72 (Weeks 52 and 72 are only for HIV ENV [gp140 T sortA] C [ZA] F Ab)

    Percentage of responders for Env-specific functional antibody response (Env ADCP gp140) were reported. The response was defined as post-baseline value > limit of detection (LOD) if baseline value <LOD or missing or defined as post-baseline value >3-fold increase from baseline if baseline value >=LOD. The lower limits of detection (LODs) for this assay were 5.16, 6.43, 6.49, 4.32 and 4.28 (phagocytic score) for Clade A (92UG037.1), Clade B (1990a), Clade C (Con C), Clade C (ZA), and Mos1, respectively.

  5. Long-term Extension (LTE) Phase: Percentage of Responders for Env-Specific Functional Antibody Response (Env ADCP gp140)

    Time frame: From Week 72 up to Week 216

    Percentage of responders for Env-specific functional antibody response (Env ADCP gp140) were planned to be reported.

  6. Late-boost (LB) Vaccination Phase: Percentage of Responders for Env-Specific Functional Antibody Response (Env ADCP gp140)

    Time frame: From Week 188 up to end of study (Week 288)

    Percentage of responders for Env-specific functional antibody response (Env ADCP gp140) were planned to be reported.

  7. Main Study: Percentage of Responders for Env-Specific Binding Ab Isotypes (Immunoglobulin [Ig] G1 and IgG3)

    Time frame: Weeks 28, 52, and 72

    Percentage of responders for Env-specific binding Ab isotypes (IgG1 and IgG3) for Clade C (ZA) as assessed using ELISA were reported. The response was defined as post-baseline value >LLOQ if baseline <LLOQ or missing or defined as post-baseline value >3-fold increase from baseline if baseline >=LLOQ. The LLOQs for this assay were 12.3 and 12.4 EC50 for IgG1 and IgG3, respectively. EC50= 50% effective concentration.

  8. Long-term Extension (LTE) Phase: Percentage of Responders for Env-Specific Binding Ab Isotypes (Immunoglobulin [Ig] G1 and IgG3)

    Time frame: From Week 72 up to Week 216

    Percentage of responders for Env-specific binding Ab isotypes IgG1 and IgG3) were planned to be reported.

  9. Late-boost (LB) Vaccination Phase: Percentage of Responders for Env-Specific Binding Ab Isotypes (Immunoglobulin [Ig] G1 and IgG3)

    Time frame: From Week 188 up to end of study (Week 288)

    Percentage of responders for Env-specific binding Ab isotypes IgG1 and IgG3) were planned to be reported.

  10. Main Study: Percentage of Interferon (IFN)-Gamma Peripheral Blood Mononuclear Cell (PBMC) Responders to Mosaic and Potential T-cell Epitope (PTE) Peptide Pools of Env/Group-Specific Antigen (Gag)/ Polymerase (Pol)

    Time frame: Weeks 28, 52, and 72

    Percentage of IFN-gamma PBMC responders to mosaic and PTE peptide pools of Env/Gag/Pol as assessed by ELISpot was reported. The response was defined as post-baseline value >P95 if baseline <P95 or missing or defined as post-baseline value >3-fold increase from baseline if baseline >=P95.

  11. Long-term Extension (LTE) Phase: Percentage of Interferon (IFN)-Gamma Peripheral Blood Mononuclear Cell (PBMC) Responders to Mosaic and Potential T-cell Epitope (PTE) Peptide Pools of Env/Group-Specific Antigen (Gag)/ Polymerase (Pol)

    Time frame: From Week 72 up to Week 216

    Percentage of Interferon (IFN)-Gamma PBMC responders to Mosaic and Potential T-cell Epitope (PTE) Peptide Pools of Env/Group-Specific Antigen (Gag)/ Polymerase (Pol) was planned to be reported.

  12. Late-boost (LB) Vaccination Phase: Percentage of Interferon (IFN)-Gamma Peripheral Blood Mononuclear Cell (PBMC) Responders to Mosaic and Potential T-cell Epitope (PTE) Peptide Pools of Env/Group-Specific Antigen (Gag)/ Polymerase (Pol)

    Time frame: From Week 188 up to end of study (Week 288)

    Percentage of Interferon (IFN)-Gamma PBMC responders to Mosaic and Potential T-cell Epitope (PTE) Peptide Pools of Env/Group-Specific Antigen (Gag)/ Polymerase (Pol) were planned to be reported.

  13. Main Study: Percentage of Responders With Cluster of Differentiation (CD)4+ and CD8+ T-Cell Functionality

    Time frame: Weeks 28, 52, and 72

    Percentage of responders with CD4+ and CD8+ T-cell functionality (cells producing IFN-gamma and /or IL-2) were reported. Intracellular cytokine staining (ICS) was performed to examine the type of T-cell responding to vaccination. Responder definition was based on the Fisher's exact text between cytokine producing cells and non-producing cells in stimulated versus non-stimulated conditions.

  14. Long-term Extension (LTE) Phase: Percentage of Responders With Cluster of Differentiation (CD)4+ and CD8+ T-Cell Functionality

    Time frame: From Week 72 up to Week 216

    Percentage of Responders With Cluster of Differentiation (CD)4+ and CD8+ T-Cell Functionality (cells Producing IFN-Gamma and/or Interleukin [IL-2]) were planned to be reported. Intracellular cytokine staining (ICS) was performed to examine the type of T-cell responding to vaccination. Responder definition was based on the Fisher's exact text between cytokine producing cells and non-producing cells in stimulated versus non-stimulated conditions.

  15. Late-boost (LB) Vaccination Phase: Percentage of Responders With Cluster of Differentiation (CD)4+ and CD8+ T-Cell Functionality

    Time frame: Weeks 192 and 196

    Percentage of responders with CD4+ and CD8+ T-cell functionality (cells producing IFN-gamma and /or IL-2) were reported. Intracellular cytokine staining (ICS) was performed to examine the type of T-cell responding to vaccination. Responder definition was based on the Fisher's exact text between cytokine producing cells and non-producing cells in stimulated versus non-stimulated conditions.

  16. Main Study: Percentage of Participants With T-Cell Development

    Time frame: From Baseline (Day 1) up to Week 72

    Percentage of participants with T-Cell development were planned to be reported.

  17. Long-term Extension (LTE) Phase: Percentage of Participants With T-Cell Development

    Time frame: From Week 72 up to Week 216

    Percentage of participants with T-Cell development were planned to be reported.

  18. Late-boost (LB) Vaccination Phase: Percentage of Participants With T-Cell Development

    Time frame: From Week 188 up to end of study (Week 288)

    Percentage of participants with T-Cell Development were planned to be reported.

Sponsors and collaborators

Lead sponsor

Janssen Vaccines & Prevention B.V.

Industry

Registry information

Official study title

A Randomized, Parallel-group, Placebo-controlled, Double-blind Phase 1/2a Study in Healthy HIV Uninfected Adults to Assess Safety/Tolerability and Immunogenicity of 2 Different Prime/Boost Regimens: Priming With Tetravalent Ad26.Mos4.HIV and Boosting With Tetravalent Ad26.Mos4.HIV and Either Clade C gp140 Plus Adjuvant OR a Combination of Mosaic and Clade C gp140 Plus Adjuvant

Acronym: IPCAVD-012

Important dates

Study start
2017
Primary completion
2023
Study completion
2023
First posted
Oct 17, 2016
Registry last updated
May 25, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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