NCT02315703

Safety, Tolerability, and Immunogenicity Study of Homologous Ad26 Mosaic Vector Vaccine Regimens or Heterologous Ad26 Mosaic and MVA Mosaic Vector Vaccine Regimens With Glycoprotein 140 (gp140) for Human Immunodeficiency Virus (HIV) Prevention

A Phase 1/2a Trial to Evaluate the Safety/Tolerability and Immunogenicity of Homologous Ad26 Mosaic Vector Regimens or Ad26 Mosaic and MVA Mosaic Heterologous Vector Regimens, With High-Dose, Low-Dose or no Clade C gp140 Protein Plus Adjuvant for HIV Prevention

• Status: Completed
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 393 (actual)
• Sponsor: Janssen Vaccines & Prevention B.V. · Industry
• Sex: All
• Age: 18 Years – 50 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to assess the safety and tolerability of various regimens containing adenovirus serotype 26-Mosaic -Human Immunodeficiency Virus (Ad26.Mos.HIV), Modified Vaccinia Ankara (MVA)-Mosaic, and/or HIV type 1 Clade C glycoprotein 140 drug product (gp140 DP) components and to compare envelope binding antibody responses between the different vaccine regimens.

Detailed description

This is a multicenter (more than 1 hospital or medical school team work on a study), randomized (the study drug is assigned by chance), parallel group (each group of participants will be treated at the same time), placebo-controlled (study in which the experimental treatment or procedure is compared to a pretend treatment with no drug in it to test if the drug has a real effect), and double-blind (neither physician nor participant knows the treatment that the participant receives) study. All eligible participants will be randomly assigned to receive 1 of the 8 vaccine regimens. Participants will receive study vaccines (Ad26.Mos.HIV, MVA-Mosaic, gp140 DP, and placebo) 4 times as per assigned regimen. The study comprises a Screening Period (up to 4 weeks), a Vaccination Period (participants will be vaccinated at Baseline (Week 0), Week 12, Week 24 and Week 48), and a Follow-up Period (up to 48 weeks). A long-term follow-up period (approximately 2 years after Week 96) will continue for participants randomized to the regimen subsequently selected for future studies, based on analysis of Week 28 data. If Week 28 data are inconclusive, Week 52 data will be considered for regimen selection. If no clear decision can be made, the extended follow-up period could include participants from more than 1 group for assessing durability of immune responses. Participants' safety will be monitored throughout the study.

Conditions

• Healthy

Interventions

Type	Name	Description
BIOLOGICAL	Ad26.Mos.HIV	Recombinant replication-deficient Ad26 vectored vaccine and consists of 3 Ad26 vectors, one containing a mosaic insert of envelop (Env) sequence, and 2 vectors containing mosaic inserts of Gag and Pol sequences (Ad26.Mos.1.Env + Ad26.Mos1.Gag-Pol + Ad26.Mos2.Gag-Pol). Total dose is 5\*10\^10 viral particle per 0.5 milliliter (mL) injection administered intramuscularly.
BIOLOGICAL	MVA-Mosaic	Recombinant live attenuated MVA virus-vectored vaccine that has been genetically engineered to express 2 mosaic Gag, Pol, and Env sequences (Mosaic 1 and Mosaic 2). Total dose is 10\^8 plaque-forming unit per 0.5 mL injection administered intramuscularly.
BIOLOGICAL	gp140 DP Low-dose	The gp140 DP vaccine containing 50 mcg of total protein, mixed with aluminum phosphate adjuvant (0.425 mg aluminum), per 0.5 mL injection administered intramuscularly.
BIOLOGICAL	gp140 DP High-dose	The gp140 DP vaccine containing 250 mcg of total protein, mixed with aluminum phosphate adjuvant, per 0.5 mL injection administered intramuscularly.
DRUG	Placebo	Normal saline, 0.5 mL injection administered intramuscularly.

Timeline

• Start date: 2014-12-22
• Primary completion: 2017-08-29
• Completion: 2022-03-28
• First posted: 2014-12-12
• Last updated: 2025-02-04
• Results posted: 2020-11-04

Locations

12 sites across 5 countries: United States, Rwanda, South Africa, Thailand, Uganda

Regulatory

• FDA-regulated drug study