NCT05553639

HB-302/HB-301 Therapy in Participants With Metastatic Castration-Resistant Prostate Cancer

A Phase 1/2 Study of Replicating Arenavirus-based Vector(s) Encoding Prostate Cancer-Associated Antigens in Participants With Metastatic Castration-Resistant Prostate Cancer

• Status: Terminated
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 12 (actual)
• Sponsor: Hookipa Biotech GmbH · Industry
• Sex: Male
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This is a first-in-human Phase 1/2, multinational, multicenter, open-label study of HB-302/HB-301 alternating 2-vector therapy in participants with metastatic castration-resistant prostate cancer (mCRPC) comprising 2 phases: a Phase 1 Dose Escalation and recommended Phase 2 dose (RP2D) Confirmation, and a Phase 2 Dose Expansion.

Detailed description

This is a first-in-human Phase 1/2, multinational, multicenter, open-label study of HB-302/HB-301 alternating 2-vector therapy in participants with metastatic castration-resistant prostate cancer (mCRPC) comprising 2 phases: a Phase 1 Dose Escalation and recommended Phase 2 dose (RP2D) Confirmation, and a Phase 2 Dose Expansion. The Phase 1 Dose Escalation will evaluate HB-302/HB-301 alternating 2-vector therapy for safety and tolerability, preliminary efficacy and immunogenicity, and determination of a safe recommended Phase 2 dose (RP2D). A confirmatory cohort (or cohorts) will inform the determination of the RP2D. The Phase 2 Dose Expansion will assess HB-302/HB-301 alternating 2-vector therapy at the RP2D defined in the Phase 1 part of the study. Study drugs HB-301 and HB-302 are genetically-engineered replicating vectors based on the arenavirus lymphocytic choriomeningitis virus (LCMV) and arenavirus Pichinde virus (PICV), respectively. HB-301 and HB-302 express the same transgenes encoding 2 prostate cancer-associated antigens: prostatic acid phosphatase (PAP) and prostate specific antigen (PSA). HB-302/HB-301 Alternating 2-vector therapy will be administered intravenously every 3 weeks (Q3W) for the first 5 doses and every 6 weeks (Q6W) from the fifth dose and onward. HB-302 is to be administered first followed 3 or 6 weeks later by HB-301. In total, approximately 70 participants aged 18 years and older will be enrolled in this study to receive HB-302/HB-301 alternating 2-vector therapy. About 40 Investigators and study sites in the United States (US) and Europe are expected to participate in this study.

Conditions

• Prostate Cancer Metastatic

Interventions

Type	Name	Description
BIOLOGICAL	HB-302/HB-301 Alternating 2-Vector Therapy	Alternating Therapy of HB-302 and HB-301. The first 5 doses will be administered every 3 weeks. The 6th dose will be administered 6 weeks after the 5th dose. Subsequent doses will be administered every 6 weeks.

Timeline

• Start date: 2023-05-23
• Primary completion: 2024-04-29
• Completion: 2024-04-29
• First posted: 2022-09-23
• Last updated: 2024-06-12

Locations

10 sites across 1 country: United States

Regulatory

• FDA-regulated drug study