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Clinical Trial Summary

This is a study of HB-502 and HB-501 alternating 2-vector therapy in people living with human immunodeficiency virus (HIV) who are taking antiretroviral treatment (ART). The benefits of available ART are short-lived and eventually there is a return of rapid HIV replication and higher viral copy number after a period of initial improvement of infection. The study treatment made of HB-502 and HB-501 is designed to train the body to recognize and fight parts from substances found in HIV. This trial studies the safety, tolerability, and ability of HB-502 and HB-501 to stimulate an immune response against HIV in people living with HIV. Participants will receive the study treatment by injection into the muscle every 8 weeks for a duration of 24 weeks, which is followed by another 24 weeks to continue looking closely at the safety profile and anti-HIV immune reaction after the last dose of study treatment.


Clinical Trial Description

This is a first-in-human Phase 1b, randomized, double-blind, placebo-controlled, multicenter study of HB-502 and HB-501 alternating 2-vector therapy in participants with HIV who are in overall good health and on suppressive ART. The study will evaluate the safety, reactogenicity, and immunogenicity of HB-502 and HB-501 alternating 2-vector therapy. HB-502 and HB-501 are genetically engineered replicating vectors based on the arenaviruses Pichinde virus and lymphocytic choriomeningitis virus, respectively. The HB-502 and HB-501 vectors have been engineered to deliver HIV antigens derived from parts of key, immunogenic regions of HIV type 1 (HIV-1) proteins that are highly conserved within HIV-1 clade B variants. The designed immunogens differ from each other by their amino acid sequence allowing for coverage of >80% of circulating HIV-1 viral variants. Two different dose levels (Dose Level 1 and Dose Level 2) of HB-502 and HB-501 alternating 2-vector therapy or placebo will be administered intramuscularly every 8 weeks for 24 weeks (i.e., 4 doses at Weeks 0, 8, 16, and 24), which is followed by a 24-week follow-up period. In total, approximately 30 participants aged 18 to 65 years will be enrolled in this study to receive HB-502 and HB-501 alternating 2-vector therapy or placebo. About 5 Investigators and study sites in the United States are expected to participate in this study. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06430905
Study type Interventional
Source Hookipa Biotech GmbH
Contact General Hookipa Contact
Phone +1 240-367-5320
Email clinicaltrials@hookipapharma.com
Status Not yet recruiting
Phase Phase 1
Start date June 2024
Completion date November 2025

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