About this trial
Phase 1, single center, randomized, double blind, placebo controlled SAD study assessing safety, tolerability, PK, PD, and immunogenicity of HB2198 after a single IV infusion in healthy adults. Four dose levels will be explored with sentinel participants per cohort. Approximately 32 participants (6 HB2198:2 placebo per cohort) will be followed for \~2 months, with extended follow up if B-cell counts remain suppressed.
Eligibility criteria
Qualifiers
18-55 years; Healthy Adults
IgG ≥ 600 mg/dL
Peripheral B cell count within lab normal range
Negative pregnancy test (WOCBP) and protocol specified contraception
Disqualifiers
Clinically significant disease that could affect safety or data
Hypogammaglobulinemia; active/recent significant infection
Chronic antivirals/antimicrobials
Recent major surgery; live vaccine <30 days (inactivated ≥14 days before Day 1 recommended)
Trial design
Treatments tested in this trial
- HB2198, a Tetravalent Bispecific Anti-CD19/CD20 Antibody with Dual Fc Domains
- Placebo comparator: HB2198 Diluent