NCT05470400

A Clinical Trial to Evaluate Safety, Tolerability, and Immunogenicity of Adjuvanted HIV-1 Fusion Peptide Conjugate Vaccine Alone or in Prime-Boost Regimens With Adjuvanted HIV-1 Envelope Trimer 4571 and HIV-1 Trimer 6931 Vaccines in Healthy Adults

A Phase 1, Open-Label Clinical Trial to Evaluate Safety, Tolerability, and Immunogenicity of Adjuvanted HIV-1 Fusion Peptide Conjugate Vaccine (VRC-HIVVCP0108-00-VP) Alone or in Prime-Boost Regimens With Adjuvanted HIV-1 Envelope Trimer 4571 (VRC-HIVRGP096-00-VP) and HIV-1 Trimer 6931 (VRC-HIVRGP0106-00-VP) Vaccines in Healthy Adults

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 44 (actual)
• Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) · NIH
• Sex: All
• Age: 18 Years – 50 Years
• Healthy volunteers: Accepted

Summary

This is an open-label, dose-escalation study to examine the safety, tolerability, and immunogenicity of adjuvanted Fusion Peptide Vaccine alone or in prime-boost regimens with adjuvanted Trimer 4571 and Trimer 6931 vaccines in healthy adults. The hypothesis is that the vaccines will be safe, and well tolerated when administered alone, and when co-administered with HIV-1 Trimer 4571, in prime-boost regimens, and will induce detectable immune response.

Detailed description

This study has two parts. Part A will evaluate the safety, tolerability, and immunogenicity of single doses of the FP conjugate, Trimer 4571 and Trimer 6931 vaccines, in a dose-escalation design. Each product must be assessed as safe prior to use in Part B. Trimer 4571 with alum adjuvant has been previously evaluated in humans but will be tested in Part A with Adjuplex. Part B will evaluate the safety, tolerability, and immunogenicity of FP conjugate prime, Trimer 4571 prime, or an FP plus Trimer 4571 prime, all followed by subsequent doses of Trimer 4571, or Trimer 6931, or both alone and then both Trimers combined. Total study duration is 36 months (includes enrollment, planned safety holds and follow-up).

Conditions

• HIV

Interventions

Type	Name	Description
BIOLOGICAL	FP conjugate vaccine (25 mcg)	FP8v1-rTTHC (FP conjugate vaccine) is an HIV-1 fusion peptide conjugated to recombinant tetanus toxoid heavy chain fragment C (rTTHC) via sulfo-SIAB chemical linker. Study vaccines will be admixed with Adjuplex adjuvant and administered intramuscularly (IM) via needle and syringe in two injection sites.
BIOLOGICAL	FP conjugate vaccine (200 mcg)	FP8v1-rTTHC (FP conjugate vaccine) is an HIV-1 fusion peptide conjugated to recombinant tetanus toxoid heavy chain fragment C (rTTHC) via sulfo-SIAB chemical linker. Study vaccines will be admixed with Adjuplex adjuvant and administered intramuscularly (IM) via needle and syringe in two injection sites.
BIOLOGICAL	Trimer 6931 (100 mcg)	HIV-1 Trimer 6931 (Trimer 6931) is a synthetic soluble HIV-1 envelope product that consists of an HIV-1 envelope (Env) trimer variant, derived from consensus clade C sequence (ConC). Study vaccines will be admixed with Adjuplex adjuvant and administered intramuscularly (IM) via needle and syringe in two injection sites.
BIOLOGICAL	Trimer 6931 (200 mcg)	HIV-1 Trimer 6931 (Trimer 6931) is a synthetic soluble HIV-1 envelope product that consists of an HIV-1 envelope (Env) trimer variant, derived from consensus clade C sequence (ConC). Study vaccines will be admixed with Adjuplex adjuvant and administered intramuscularly (IM) via needle and syringe in two injection sites.
BIOLOGICAL	Trimer 4571 (200 mcg)	HIV-1 Trimer 4571 (Trimer 4571) is a synthetic soluble HIV-1 envelope product that consists of an HIV-1 envelope (Env) trimer variant, derived from clade A, strain BG505. Study vaccines will be admixed with Adjuplex adjuvant and administered intramuscularly (IM) via needle and syringe in two injection sites.
BIOLOGICAL	Trimer 4571 (100 mcg)	HIV-1 Trimer 4571 (Trimer 4571) is a synthetic soluble HIV-1 envelope product that consists of an HIV-1 envelope (Env) trimer variant, derived from clade A, strain BG505. Study vaccines will be admixed with Adjuplex adjuvant and administered intramuscularly (IM) via needle and syringe in two injection sites.

Timeline

• Start date: 2022-08-15
• Primary completion: 2024-01-24
• Completion: 2024-01-24
• First posted: 2022-07-22
• Last updated: 2025-03-21
• Results posted: 2025-03-21

Locations

6 sites across 1 country: United States

Regulatory

• FDA-regulated drug study