Immunogenicity, Safety, and Tolerability of rF1V-1018 Vaccine in Adults 18 to 55 Years of Age

Not Applicable

Recruiting

• Conditions: Prevention of Pneumonic Plague Resulting From Aerosol Exposure to Yersenia Pestis
• Interventions: Biological: rF1V-1018

• Registration Number: NCT07207408
• Lead Sponsor: Dynavax Technologies Corporation

Brief Summary

This study will evaluate the immunogenicity, safety, and tolerability of rF1V-1018 vaccine

Detailed Description

This dose-finding study will evaluate the immunogenicity, safety, and tolerability of multiple doses and regimens of rF1V-1018 vaccine in healthy adults. Immunogenicity blood samples will be drawn at several timepoints during the study. Participants will return to the clinic for periodic visits for study specific evaluations including evaluation of immunogenicity and safety. Safety assessments will be done at regular intervals through the end of the trial.

Six dose regimens will be tested in Part 1 of the study. Up to two dose regimens from Part 1 will be chosen for Part 2 of the study.

Study Timeline

• Study Start: 2025-09-11
• Status Verified: 2025-10
• Study First Submitted: 2025-10-02
• Study First Submitted QC: 2025-10-02
• Last Update Submitted: 2025-10-02
• Study First Posted: 2025-10-06
• Last Update Posted: 2025-10-06
• Primary Completion: 2026-05-29
• Study Completion: 2026-10-16

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 148

Inclusion Criteria

1. Adults 18 to 55 years of age
2. Healthy participants or participants with stable pre-existing medical conditions Pre-existing stable medical condition means a participant who: has full capacity of daily activity and no major medication modification within 3 months prior to Day 1; has not undergone surgical or minimally-invasive intervention or had any hospitalization/emergency room visit for the specific medical condition.
3. Able to comply with the protocol schedule and procedures
4. Able and willing to provide written informed consent
5. If female of child-bearing potential and heterosexually active, has practiced adequate contraception for at least 28 days prior to vaccination, has negative pregnancy tests just prior to vaccination, and has agreed to continue adequate contraception through three months following the final trial injection

A premenopausal woman who has at least one of the following is considered not of childbearing potential:

1. Documented hysterectomy
2. Documented bilateral salpingectomy
3. Documented bilateral oophorectomy
4. Documented and current bilateral tubal ligation or occlusion

Exclusion Criteria

1. A history of plague disease or have previously received any plague vaccine

2. Active tuberculosis or other systemic infectious process

3. History of human immunodeficiency virus (HIV), hepatitis B (HBV) or hepatitis C (HCV) infection, or positive test for antibody to HIV, HBV, or HCV

4. History of autoimmune disorder

5. History of sensitivity to any component of trial vaccines

6. Body mass index ≥ 30 kg/m2

7. Has received the following prior to any trial injection:

   a) ≤ 14 days: i) Any licensed or authorized inactivated vaccines (including vaccines containing mRNA or CpG) b) ≤ 28 days: i) Any live vaccine ii) Any investigational medicinal agent c) ≤ 90 days: i) Chronic administration (defined as more than 14 consecutive days in total) of immunosuppressants or other immune-modifying drugs during the period starting 90 days prior to the first trial vaccine administration or planned administration during the trial period. (For corticosteroids, this will mean prednisone ≥20 mg/day, or equivalent). Inhaled, topical, and intraarticular steroids are allowed.

   ii) Granulocyte or granulocyte-macrophage colony stimulating factor iii) Immunoglobulins or any blood products (receipt of certain monoclonal antibodies may on a case-by-case basis be non-exclusionary if approved via consultation with Sponsor Medical Monitor) iv) Antisense oligonucleotides v) Drugs/investigational agents with very long half-lives (defined as ≥ 60 days) (eg, radioactive iodine, amiodarone, liraglutide, nirsevimab, teplizumab, evinacumab, and obinutuzumab) vi) Infusion of blood products d) At any time: DNA plasmids or other genetic therapy intended to integrate permanently into host cells

8. If female is pregnant (known before or established at the time of screening), breastfeeding, or planning breastfeeding or a pregnancy

9. Is undergoing chemotherapy or expected to receive chemotherapy during the trial period; has a diagnosis of cancer within the last 5 years other than squamous cell or basal cell carcinoma of the skin

10. History or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with participation for the full duration of the trial, or is not in the best interest of the participant to participate, in the opinion of the treating investigator

11. Oral temperature ≥ 38°C (≥ 100.4°F) at the time of vaccine administration

12. History of acute myocardial infarction (AMI) or documented coronary artery disease (CAD)

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SEQUENTIAL

Arm && Interventions

Group	Intervention	Description
Arm 1	rF1V-1018	-
Arm 2	rF1V-1018	-
Arm 3	rF1V-1018	-
Arm 4	rF1V-1018	-
Arm 5	rF1V-1018	-
Arm 6	rF1V-1018	-

Primary Outcome Measures

Name	Time	Method
Anti-rF1V antibody level	4 weeks after final study vaccine
Evaluate safety of rF1V-1018	injection reactions through 7 days after each study vaccine, adverse events for 28 days after each study vaccine; SAEs, MAEs, imAESIs through 6 months after the final study vaccine	Evaluate adverse events

Trial Locations

Locations (3)

AMR- Miami; 🇺🇸 Miami, Florida, United States

AMR- El Dorado; 🇺🇸 El Dorado, Kansas, United States

AMR- Las Vegas; 🇺🇸 Las Vegas, Nevada, United States