NCT03220724

Evaluating the Safety and Immunogenicity of EnvSeq-1 and CH505 M5 gp120 Envs Adjuvanted With GLA-SE in Healthy, HIV-Uninfected Adults

A Phase 1 Clinical Trial to Evaluate the Safety and Immunogenicity of EnvSeq-1 and CH505 M5 gp120 Envs Adjuvanted With GLA-SE in Healthy, HIV-Uninfected Adult Participants

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 117 (actual)
• Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) · NIH
• Sex: All
• Age: 18 Years – 50 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to evaluate the safety, tolerability, and immunogenicity of EnvSeq-1 and CH505 M5 gp120 Envs adjuvanted with GLA-SE in healthy, HIV-uninfected adults.

Detailed description

This study will evaluate the safety, tolerability, and immunogenicity of EnvSeq-1 and CH505 M5 gp120 Envs adjuvanted with GLA-SE in healthy, HIV-uninfected adults. The three individual EnvSeq-1 HIV vaccine Envs used in this study are called CH505TF gp120, CH505w53 gp120, and CH505w78 gp120. This study will take place in two parts: Part A and Part B. Participants in Part A will be randomly assigned to one of four groups. Participants in each group will receive CH505TF (admixed with GLA-SE) or placebo by intramuscular (IM) injection at Months 0, 2, 4, 8, and 12. Study researchers will evaluate participant data from Part A of the study prior to enrolling participants into Part B of the study. Researchers will also evaluate data from Part A to determine the dosing for Part B. Participants in Part B will be randomly assigned to one of four groups. Participants in each group will receive IM injections at Months 0, 2, 4, 8. GLA-SE will be admixed with all the CH505 gp120 vaccines. Part B, Group 5 will follow a sequential approach to EnvSeq-1 vaccine administration with administration of the CH505TF vaccine at Month 0, then CH505w53 at Month 2, and CH505w78 at Months 4, and 8. Part B, Group 6 participants will follow an additive approach to EnvSeq-1 administration with administration of the CH505TF vaccine at Month 0; then the CH505TF and CH505w53 vaccines at Month 2; then the CH505TF, CH505w53 and CH505w78 vaccines at Month 4; then the CH505w53 and CH505w78 vaccines at Month 8. Part B, Group 7 participants will receive CH505 M5 at Months 0, 2, 4, and 8. Part B, Group 8 participants will receive placebo injections at each time point. Additional study visits will occur through Month 18 for participants in Part A and through Month 14 for participants in Part B. Visits may include physical examinations and clinical assessments; blood, urine, and stool collection; HIV testing; risk reduction counseling; and interviews/questionnaires. Study staff will contact participants for follow-up health monitoring at Month 24 for participants in Part A and at Month 20 for participants in Part B. Part C will be an open-label study arm using the EnvSeq-1 proteins in sequential administration (CH505TF, CH505w53, and CH505w78 gp120s) at the same dose as in Part B (400 mcg) to allow for in-depth analysis of B cell precursor frequency.

Conditions

• HIV Infections

Interventions

Type	Name	Description
BIOLOGICAL	CH505TF	Administered by intramuscular (IM) injection in the thigh
BIOLOGICAL	CH505w53	Administered by IM injection in the thigh
BIOLOGICAL	CH505w78	Administered by IM injection in the thigh
BIOLOGICAL	CH505 M5	Administered by IM injection in the thigh
BIOLOGICAL	GLA-SE adjuvant	Admixed with all CH505 gp120 proteins
BIOLOGICAL	Placebo	Administered by IM injection in the thigh

Timeline

• Start date: 2017-08-22
• Primary completion: 2023-03-21
• Completion: 2023-03-21
• First posted: 2017-07-18
• Last updated: 2026-03-17
• Results posted: 2023-02-01

Locations

8 sites across 1 country: United States

Regulatory

• FDA-regulated drug study